System in a Network Node for Regulating Temperature of Electronic Equipment
A system in a radio network node for regulating temperature of electronic equipment comprises the electronic equipment and a heat exchanger unit ( 200 ), comprising an evaporator unit ( 202 ), a condenser unit ( 203 ), and a first pipe ( 204 ). The first pipe ( 204 ) is arranged to connect the evaporator unit ( 202 ) and the condenser unit ( 203 ). A second fluid is flowable from the condenser unit ( 203 ) to the evaporator unit ( 202 ) in the first pipe ( 204 ). Furthermore, the system comprises a heater unit ( 201 ) arranged at the first pipe ( 204 ) and arranged to heat the second fluid in the first pipe ( 204 ) such that flow in the first pipe ( 204 ) is restricted. Furthermore, an arrangement ( 160 ) for restricting flow in a heat exchanger unit is provided.
1 - 5 . (canceled)
6 . A system in a radio network node for regulating the temperature of electronic equipment within the radio network node, the system comprising:
a flow generating device enclosed along with the electronic equipment within a closed space, wherein the flow generating device is configured to circulate a first fluid within the closed space for transferring heat between the electronic equipment and the first fluid,
a heat exchanger unit configured to transfer heat between the first fluid and a second fluid circulated within the heat exchanger unit, the heat exchanger unit comprising an evaporator unit, a condenser unit, and a first and a second pipe, wherein the evaporator unit is at least partly located within the closed space, wherein the condenser unit is at least partly located outside the closed space, wherein the first and second pipes are configured to connect the evaporator unit and the condenser unit within a loop, wherein the condenser unit is configured to condense the second fluid into a liquid phase for flow of condensed second fluid from the condenser unit to the evaporator unit via the first pipe, and wherein the evaporator unit is configured to evaporate the second fluid into a gaseous phase for flow of evaporated second fluid from the evaporator unit to the condenser unit via the second pipe, and
a heater unit arranged at the first pipe and configured to heat and at least partially evaporate the second fluid in the first pipe to thereby create in the first pipe a flow of evaporated second fluid, in gaseous phase, in a direction opposite the flow of condensed second fluid, in liquid phase, wherein the flow of evaporated second fluid in the first pipe regulates the flow of condensed second fluid in the first pipe and indirectly regulates the temperature of the electronic equipment.
7 . The system according to claim 6 , wherein the second fluid is a refrigerant fluid.
8 . The system according to claim 6 , wherein the heat exchanger unit comprises a thermosiphon.
9 . The system according to claim 6 , wherein the network node is a radio base station.
10 . The system according to claim 6 , further comprising a controller configured to control the heater unit and to thereby regulate the extent to which the heater unit evaporates the second fluid in the first pipe.
11 . A heat exchanger unit configured to regulate the temperature of electronic equipment, wherein heat from the electronic equipment is transferred to a first fluid and wherein the heat exchanger unit is configured to transfer heat from the first fluid to a second fluid circulated within the heat exchanger unit, the heat exchanger unit comprising:
an evaporator unit, a condenser unit, and a first and a second pipe, wherein the first and second pipes are configured to connect the evaporator unit and the condenser unit within a loop, wherein the condenser unit is configured to condense the second fluid into a liquid phase for flow of condensed second fluid from the condenser unit to the evaporator unit via the first pipe, and wherein the evaporator unit is configured to evaporate the second fluid into a gaseous phase for flow of evaporated second fluid from the evaporator unit to the condenser unit via the second pipe, and
a heater unit arranged at the first pipe and configured to heat and at least partially evaporate the second fluid in the first pipe to thereby create in the first pipe a flow of evaporated second fluid, in gaseous phase, in a direction opposite the flow of condensed second fluid, in liquid phase, wherein the flow of evaporated second fluid in the first pipe regulates the flow of condensed second fluid in the first pipe and indirectly regulates the temperature of the electronic equipment.
12 . The heat exchanger unit according to claim 11 , wherein the second fluid is a refrigerant fluid.
13 . The heat exchanger unit according to claim 11 , wherein the heat exchanger unit comprises a thermosiphon.
14 . The heat exchanger unit according to claim 11 , further comprising a controller configured to control the heater unit and to thereby regulate the extent to which the heater unit evaporates the second fluid in the first pipe.