# US 2014/0150490 A1 · Evaporator and turbo chiller including the same > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2014/0150490 A1 - Document ID: US20140150490A1 - Status: Published application - Kind: A1 - Application number: 14/091,260 - Filed: 2013-11-26 - Published: 2014-06-05 - Earliest claimed: 2012-11-30 - Assignees: LG Electronics Inc. - Inventors: Jungho KANG - Web page: https://patentgrep.com/patent/US20140150490A1 ## CPC - F25B 39/028: {having distributing means} - F25B 1/053: of turbine type - F28D 3/04: Distributing arrangements - F28D 5/02: in which the evaporating medium flows in a continuous film or trickles freely over the conduits - F25B 2339/024: Evaporators with refrigerant in a vessel in which is situated a heat exchanger - F25B 2339/047: Water-cooled condensers - F28D 2021/0064: {Vaporizers, e.g. evaporators} - F25B: REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS - F28D: HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT (fluid heaters having heat generating means and heat transferring means F24H; furnaces F27; details of heat-exchange apparatus of general) ## Abstract An evaporator and a turbo chiller including the evaporator are provided. The evaporator may be a falling film evaporator which may distribute refrigerant to a heat pipe uniformly and which may also control two-phase flow by lowering dynamic pressures of gas refrigerant and liquid refrigerant, and separate the liquid refrigerant and the gas refrigerant from each other to enhance heat exchange efficiency. ## Claims ### Claim 1 An evaporator, comprising: a distribution device comprising a first refrigerant inlet, a second refrigerant inlet and a plurality of flow channels; and a heat pipe configured to guide a flow of chilled water for heat exchange with refrigerant distributed by the distribution device, wherein the distribution device comprises: a first plate that receives refrigerant from the first and second refrigerant inlets, the first plate comprising a first plurality of flow channels that extend in a longitudinal direction of the distribution device; and a second plate that receives refrigerant from the first plate, the second plate comprising a second plurality of flow channels that extend in a width direction of the distribution device. ### Claim 2 (depends on 1) The evaporator of claim 1, wherein the first plurality of flow channels formed in the first plate comprises: at least one first flow channel that extends from the first refrigerant inlet toward the second refrigerant inlet, in a longitudinal direction of the first plate; and at least one second flow channel that extends from the second refrigerant inlet toward the first refrigerant inlet, in the longitudinal direction of the first plate. ### Claim 3 (depends on 2) The evaporator of claim 2, wherein a refrigerant flow direction in the at least one first flow channel is opposite a refrigerant flow direction in the at least one second flow channel. ### Claim 4 (depends on 3) The evaporator of claim 3, wherein the at least one first flow channel comprises a plurality of first flow channels and the at least one second flow channel comprises a plurality of second flow channels, and wherein the plurality of first flow channels and the plurality of second flow channels are alternately arranged such that one second flow channel is provided between two neighboring first flow channels. ### Claim 5 (depends on 2) The evaporator of claim 2, further comprising a plurality of first flow holes provided in the first plate to discharge refrigerant from the at least one first flow channel and the at least one second flow channel to the second plate. ### Claim 6 (depends on 2) The evaporator of claim 2, wherein the second plurality of flow channels formed in the second plate comprises: at least one third flow channel extending in a width direction of the first plate; and at least one fourth flow channel extending in the width direction of the first plate, wherein a refrigerant flow direction in the third flow channel is opposite a refrigerant flow direction in the fourth channel. ### Claim 7 (depends on 6) The evaporator of claim 6, wherein the at least one third flow channel comprises a plurality of third flow channels and the at least one fourth flow channel comprises a plurality of fourth flow channels, and wherein the plurality of third flow channels and the plurality of fourth flow channels are alternately arranged such that one fourth flow channel is provided between two neighboring third flow channels. ### Claim 8 (depends on 7) The evaporator of claim 7, further comprising a plurality of second flow holes provided in the second plate to discharge refrigerant from the plurality of third flow channels and the plurality of fourth flow channels. ### Claim 9 (depends on 7) The evaporator of claim 7, wherein the at least one first flow channel has a “∩” shape and the at least one fourth flow channel has a “∪” shape. ### Claim 10 (depends on 1) The evaporator of claim 1, further comprising a separation device configured to provide refrigerant to the distribution device, wherein the separation device comprises: a housing having a refrigerant inlet, at least one gas refrigerant outlet and a liquid refrigerant outlet; and a baffle plate provided between the liquid refrigerant outlet and the refrigerant inlet, wherein the baffle plate is positioned within the housing such that a gas-liquid refrigerant mixture drawn into the housing via the refrigerant inlet impinges on the baffle plate. ### Claim 11 (depends on 10) The evaporator of claim 10, wherein the baffle plate is positioned at a height within the housing between the at least one gas refrigerant outlet and the liquid refrigerant outlet. ### Claim 12 (depends on 10) The evaporator of claim 10, further comprising a plurality of orifices provided in the bathe plate, wherein a portion of a liquid refrigerant separated from the gas-liquid refrigerant mixture passes through the plurality of orifices and flows to the liquid refrigerant outlet and the remaining liquid refrigerant overflows the baffle plate and flows toward the liquid refrigerant outlet. ### Claim 13 (depends on 10) The evaporator of claim 10, wherein the separation device further comprises at least one lateral wall provided between the refrigerant inlet and the at least one gas refrigerant outlet, wherein gas refrigerant separated from the gas-liquid refrigerant mixture is guided toward the at least one gas refrigerant outlet, along the at least one lateral wall. ### Claim 14 (depends on 13) The evaporator of claim 13, wherein the at least one lateral wall comprises: a first lateral wall positioned adjacent to the gas refrigerant outlet, the first lateral wall having a first hole formed therein; and a second lateral wall positioned adjacent to the refrigerant inlet, the second lateral wall having a second hole formed therein, at a different height than that of the first hole. ### Claim 15 (depends on 14) The evaporator of claim 14, wherein a flow direction of the gas refrigerant guided from the baffle plate along the second lateral wall is opposite a flow direction of the gas refrigerant guided from the second lateral wall along the first lateral wall toward the at least one gas refrigerant outlet. ### Claim 16 (depends on 14) The evaporator of claim 14, wherein the first hole is provided adjacent to the gas refrigerant outlet and the second hole is provided adjacent to the liquid refrigerant outlet. ### Claim 17 (depends on 16) The evaporator of claim 16, wherein the baffle plate is positioned at a vertical height within the housing that is between the first hole and the second hole. ### Claim 18 A chilling system, comprising: a compressor comprising an impeller compressing a refrigerant; a condenser performing heat exchange between refrigerant received from the compressor and chilled water; an evaporator performing heat exchange between the chilled water and refrigerant discharged from the condenser, the evaporator comprising a distribution device and a heat pipe in which the chilled water for heat exchange with refrigerant distributed by the distribution device flows; and an expansion valve provided between the condenser and the evaporator, wherein the distribution device comprises: a first plate comprising a first plurality of low channels extending in a longitudinal direction of the distribution device; and a second plate comprising a second plurality of flow channels extending a width direction of the distribution device to guide refrigerant received from the first plate therethrough. ### Claim 19 (depends on 18) The system of claim 18, wherein the first plate comprises: a first refrigerant inlet; a second refrigerant inlet; at least one first flow channel extending in a longitudinal direction of the first plate from the first refrigerant inlet toward the second refrigerant inlet; and at least one second flow channel extending in the longitudinal direction of the first plate from the second refrigerant inlet toward the first refrigerant inlet, and wherein the second plate comprises: at least one third flow channel extending in a width direction of the first plate; and at least one fourth flow channel extending in the width direction of the first plate ### Claim 20 (depends on 19) The system of claim 19, wherein a refrigerant flow direction in the at least one first flow channel is opposite a refrigerant flow direction in the at least one second flow channel, and a refrigerant flow direction in the at least one third flow channel is opposite a refrigerant flow direction in the at least one fourth flow channel, and wherein the refrigerant flow directions in the first and second flow channels are orthogonal to the refrigerant flow directions in the third and fourth flow channels. ### Claim 21 A chilling system including an evaporator, the system comprising: a compressor comprising an impeller compressing a refrigerant; a condenser performing heat exchange between refrigerant received from the compressor and chilled water; and an expansion valve provided between the condenser and the evaporator, wherein the evaporator comprises: a separation device, comprising: a housing; a refrigerant inlet, at least one gas refrigerant outlet and a liquid refrigerant outlet provided at the housing; and a baffle plate provided in the housing, positioned between the liquid refrigerant outlet and the refrigerant inlet such that refrigerant drawn into the housing via the refrigerant inlet impinges on the baffle plate; a distribution device connected to the liquid refrigerant outlet of the separation device and configured to distribute liquid refrigerant received from the separation device sequentially in a longitudinal direction and a width direction of the distribution device; and a pipe configured to guide chilled water heat exchange with the liquid refrigerant distributed by the distribution device.