[go: up one dir, main page]

DK180804B1 - Cooling system and a method for operating a cooling system - Google Patents

Cooling system and a method for operating a cooling system Download PDF

Info

Publication number
DK180804B1
DK180804B1 DKPA202070232A DKPA202070232A DK180804B1 DK 180804 B1 DK180804 B1 DK 180804B1 DK PA202070232 A DKPA202070232 A DK PA202070232A DK PA202070232 A DKPA202070232 A DK PA202070232A DK 180804 B1 DK180804 B1 DK 180804B1
Authority
DK
Denmark
Prior art keywords
suction gas
heat exchanger
tank
evaporator
compressor
Prior art date
Application number
DKPA202070232A
Other languages
Danish (da)
Inventor
Clarence Larsen Flemming
Original Assignee
Mayekawa Europe Nv
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Mayekawa Europe Nv filed Critical Mayekawa Europe Nv
Priority to DKPA202070232A priority Critical patent/DK180804B1/en
Priority to EP21737556.7A priority patent/EP4136395A1/en
Priority to US17/918,640 priority patent/US20230143388A1/en
Priority to PCT/DK2021/050111 priority patent/WO2021209111A1/en
Publication of DK202070232A1 publication Critical patent/DK202070232A1/en
Application granted granted Critical
Publication of DK180804B1 publication Critical patent/DK180804B1/en

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B39/00—Evaporators; Condensers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
    • F28D7/00—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall
    • F28D7/02—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits being helically coiled
    • F28D7/026—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits being helically coiled the conduits of only one medium being helically coiled and formed by bent members, e.g. plates, the coils having a cylindrical configuration
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F5/00—Air-conditioning systems or apparatus not covered by F24F1/00 or F24F3/00, e.g. using solar heat or combined with household units such as an oven or water heater
    • F24F5/0007—Air-conditioning systems or apparatus not covered by F24F1/00 or F24F3/00, e.g. using solar heat or combined with household units such as an oven or water heater cooling apparatus specially adapted for use in air-conditioning
    • F24F5/001—Compression cycle type
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B39/00—Evaporators; Condensers
    • F25B39/02—Evaporators
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B40/00—Subcoolers, desuperheaters or superheaters
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B40/00—Subcoolers, desuperheaters or superheaters
    • F25B40/02—Subcoolers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
    • F28D7/00—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall
    • F28D7/10—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits being arranged one within the other, e.g. concentrically
    • F28D7/12—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits being arranged one within the other, e.g. concentrically the surrounding tube being closed at one end, e.g. return type
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
    • F28D9/00—Heat-exchange apparatus having stationary plate-like or laminated conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall
    • F28D9/0012—Heat-exchange apparatus having stationary plate-like or laminated conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the apparatus having an annular form
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B2339/00—Details of evaporators; Details of condensers
    • F25B2339/02—Details of evaporators
    • F25B2339/024—Evaporators with refrigerant in a vessel in which is situated a heat exchanger
    • F25B2339/0241—Evaporators with refrigerant in a vessel in which is situated a heat exchanger having plate-like elements
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B2400/00—General features or devices for refrigeration machines, plants or systems, combined heating and refrigeration systems or heat-pump systems, i.e. not limited to a particular subgroup of F25B
    • F25B2400/23—Separators

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Development (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
  • Devices That Are Associated With Refrigeration Equipment (AREA)

Abstract

The present invention relates to a cooling system with at least one heat exchanger for heating the suction gas between the evaporator and the compressor inlet, which heat exchanger is heated by the refrigerant liquid. It is the object to achieve dry suction gas from a flooded evaporator. It is an object to achieve heat exchange with a minimum flow restriction. The objects can be fulfilled by a heat exchanger comprising a circulating path for the suction gas and for the refrigerant liquid. Hereby can be achieved that the circulating path forms a highly effective heat exchanger. The circulating path can be achieved with a very large heat-transmitting surface. The circulation of the suction gas will force liquid particles in the suction gas to be forced outside in the circulating path and in that way come in direct thermal contact with the surface that separates the suction gas with the refrigerant liquid.

Description

DK 180804 B1 1 Cooling system and a method for operating a cooling system Field of the Invention The present invention relates to a cooling system comprising at least one compressor, at least one condenser, at least one pressure reduction means such as an expansion valve, at least one evaporator, at least one heat exchanger for heating the suction gas between the evaporator and the compressor inlet, which heat exchanger is heated by the refrig- erant liquid, the heat exchanger comprises a circulating path for the suction gas and for the refrigerant liquid.
Background of the Invention US 6,523,365 B2 discloses an accumulator with an internal heat exchanger for use in an air conditioning or refrigeration system having a compressor, a condenser, an expan- sion device, and an evaporator. In operation, the accumulator is placed in the system so high pressure, high temperature refrigerant flowing from the condenser and low pres- sure, low temperature refrigerant flowing from the evaporator simultaneously enters and flows through the heat exchanger disposed in the accumulator, whereby the low pressure, low temperature refrigerant absorbs heat and thereby cools the high pressure, high temperature refrigerant. In one embodiment, the heat exchanger comprises a tube having at least one high temperature channel and one low temperature channel extend- ing through the interior of the tube. In a second embodiment, the heat exchanger com- prises a single spirally wound coaxial tube having an outer tube and an inner tube posi- tioned within the outer tube. In a third embodiment, the heat exchanger comprises a plurality of coaxial tubes, each coaxial tube having an outer tube and an inner tube po- sitioned in the outer tube wherein the inner tubes are fluidly connected. GB 2386939 discloses a cooling system comprising an internal heat exchanger, for use in an air conditioning or refrigeration system having a compressor, a condenser, an ex- pansion device, and an evaporator, is placed in the system so that in operation high pressure, high temperature refrigerant flowing from the condenser and low pressure, low temperature refrigerant flowing from the evaporator simultaneously enter and flow through the heat exchanger disposed in the accumulator whereby the low pressure, low
DK 180804 B1 2 temperature refrigerant absorbs heat and thereby cools the high pressure, high temper- ature refrigerant.
The heat exchanger comprises a single helically wound coaxial tube having an outer tube and an inner tube positioned within the outer tube.
Fins may be used to separate the respective tubes.
Hot refrigerant from the condenser flows through the inner tube.
A vapour conduit or J-tube positioned underneath a deflector may be used to return gaseous refrigerant to the compressor.
The heat exchanger do not provide an optimal heat transfer is clearly limited by flow restriction, e.g. due to the construction of the heat exchanger.
Object of the Invention It is the first object of the present invention to achieve dry suction gas from a flooded evaporator.
It is a further object of the present invention to achieve heat exchange with a minimum flow restriction.
It is a further object of the present invention to achieve evaporation of liquid contained in the suction gas.
Description of the Invention The objects can be fulfilled by a system as disclosed in the opening paragraph in which the circulating path is formed in a tank by a number of direction plates, which tank further comprises a heat exchanger formed as a plate heat exchanger.
Hereby can be achieved that the circulating path forms a highly effective heat ex- changer.
Of course, the circulating path must be formed so that there is a separation between the suction gas and the refrigerant liquid.
The circulating path can be achieved with a very large heat-transmitting surface.
The circulation of the suction gas will force liquid particles in the suction gas to be forced outside in the circulating path and in that way come in direct thermal contact with the surface that separates the suction gas with the refrigerant liquid.
Hereby can be achieved that all liquid particles contained in the suction gas will be evaporated during the passage of the circulating path.
By this highly effective evaporation of liquid particles in the suction gas, it is possible to use flooded evaporators, which can be totally flooded because afterwards the suction gas is leaving the evaporator.
The rest of the liquid that is contained in the suction gas will afterwards be evaporated in the heat exchanger.
In that way, the pending patent application
DK 180804 B1 3 discloses a system where evaporators can be used one hundred percent, because they can be totally flooded. In prior art cooling systems flooded evaporators are only flooded up to max 80-90% in systems operating with piston compressors.
In a preferred embodiment for the invention the circulating path can be formed in a tank by a number of direction plates for generating a circulating path, which tank further comprises a heat exchanger formed as a plate heat exchanger. Hereby can be achieved that the directing plates forces the suction gas to circulate inside a heat exchanger. The circulation of the suction gas forces liquid particles in the suction gas into contact with the heat exchanger. In a preferred embodiment for the invention can the circulating path can be formed in a tank, which tank comprises a hollow screw. Inside the hollow screw is the refrigerant liquid adapted to circulate outside the hollow screw is the suction gas adapted to circu- late. Hereby can be achieved that the hollow screw has a very large surface. The screw can be formed so that the suction gas is entering the screw in the top and the suctions gas has to follow the screw with several turns into the bottom of a tank. The suction gas will therefore follow the circulating path defined by the screw. Inside the screw is the warm refrigeration liquid circulating, which is coming directly from the condenser. All liquid particles that will come in touch with the hollow screw will be heated and in that way there will be performed evaporation. Because the hollow screw is extremely long, it is possible to evaporate liquid particles up to more than 10% in the suction gas. Hereby is achieved that evaporators can be totally flooded and in that way evaporators can be very effective. In a further preferred embodiment for the invention the tank can comprise an inlet for the refrigerant liquid and an outlet for the refrigerant liquid, which tank comprises an inlet for the suction gas and an outlet for the suction gas. Hereby can be achieved that the tank containing the hollow screw is connected to the evaporator for inlet of suction gas and connected to the suction side of the compressor at the outlet of the suction gas. Further, the tank is connected to the condenser and liquid refrigerant is sent from the tank through an expansion valve to the evaporator.
DK 180804 B1 4 In a further preferred embodiment for the invention the tank can comprise an oil outlet. Hereby can be achieved that oil drops that is collected in the suction gas flows into the tank and circulates outside the hollow screw, where the oil drops will flow at the outside of the screw and probably these oil particles will follow the screw downwards and end in the bottom of the tank. From the bottom of the tank, oil can in different way be trans- ported back to the compressor, where oil is needed for lubrication. Some cooling sys- tems will include a pump that can perform the transport of the oil back to the compres- sor. In large evaporator systems, where for example screw compressors are used, oil separation and return of oil is very important.
The object can also be fulfilled by a method for operating a cooling system as previous disclosed, where the compressor generates pressure in a refrigerant gas, which gas is condensed in a condenser to a refrigerant liquid, which liquid is sent to at least one evaporator through a pressure reduction means such as an expansion valve, where a heat exchanger for heating the suction gas is placed between the evaporator and the com- pressor inlet, which heat exchanger is heated by the refrigerant liquid, where the heat exchanger forces the suction gas into a circulating path for the suction gas, and the heat exchanger forces the refrigerant liquid to heat the suction gas.
Hereby can be achieved that a highly effective evaporation of liquid gas particles con- tained in the suction gas will be evaporated. By use of a highly effective heat exchanger it is possible to use a totally to flood evaporators. Even if there are several percentages of liquid particles in the suction gas, these liquid particles will be evaporated in the circulating path for the suction gas. The gas is circulating easily, but liquid particles will be forced in contact with the walls, and if the walls are in contact with the liquid refrig- erant, a slight heating is performed which will evaporate the liquid particles in the suc- tion gas.
In a preferred embodiment for the invention the suction gas can be forced into the cir- culating path at the outside of a hollow screw, and inside the hollow screw the refriger- ant liquid can be forced to circulate. Hereby can be achieved that the hollow screw can be formed with a very large surface. The suction gas will follow the circulating path defined by the screw. Inside the screw warm refrigerant liquid can be circulating, which is coming directly from the condenser. All liquid particles that will come in touch with
DK 180804 B1 the hollow screw will be heated and in that way there will be performed evaporation. Because the hollow screw is extremely long, it is possible to evaporate liquid particles up to more than 10% in the suction gas. Hereby is achieved that evaporators can be totally flooded and in that way be very effective. 5 Description of the Drawing Fig. 1 shows a cooling system. Fig. 2 shows a sectional view of a small section of the tank. Fig. 3a shows a possible embodiment for a cooling system. Fig. 3b shows a possible embodiment for a cooling system. Fig. 4 shows a sectional view of a section of a tank. Detailed Description of the Invention Fig. 1 shows a cooling system as disclosed in US 6,523,365 B2. Fig. 1 shows a cooling system 2 with a compressor 4, which compressor has an inlet 5. The outlet from the compressor leads to a condenser 8, from which condenser refrigerant liquid is sent to a heat exchanger 18 placed in a tank 24. From the tank 24 refrigerant liquid 10 is sent through tubes to a pressure reduction means 14, probably formed as an expansion valve
16. From the expansion valve 16, refrigerant liquid is sent to at least one evaporator 12. From the evaporator 12, the suction gas 20 is sent to the heat exchanger 18. From the heat exchanger 18, the suction gas is sent to the compressor inlet 5. Fig. 2 shows a sectional view of a small section of the tank 24. The sectional view is only to show the principles. Fig. 2 shows an inlet 10 for liquid refrigerant to a tube 32 to the inner 28 of the hollow screw 26. An outlet 34 shows that the liquid refrigerant is sent further in the system. Outside 30 the hollow screw 26, the suction gas is circulating, which has an inlet 36 and an outlet 38. The suction gas is forced to circulate along the hollow screw downwards. The tank can comprise an oil outlet 40. Figs. 3a and 3b are partly overlapping and disclose a possible embodiment for a cooling system 102. The figures show a compressor module 104 with a compressor inlet line
105. The compressor module 104 has a pressure outlet 107, which is connected to a condenser 108. The condenser 108 is connected to a tank 124 via a pressure line 132,
DK 180804 B1 6 where the liquid refrigerant is passing a circulating path inside the tank 124. The liquid refrigerant leaves the tank 124 to a line 134, and the liquid refrigerant is sent to an expansion valve 116, before the expanded refrigerant is sent to the evaporator 112. From the evaporator 112 the suction gas is sent to a pressure line 136 into the tank 124 and into a circulating path 122 placed inside the tank 124. In the tank 124 the suction gas is slightly heated by the liquid refrigerant that is passing through the line 132 to the line
134. The suction gas is leaving the tank by a connection 138, where the suction gas 105 is sent into the compressor. The tank 124 comprises an oil outlet 140 connected to an oil valve 142. Further is indicated an oil valve 144 connected to the evaporator 112. The two oil lines are connected to a valve lock 146. The outlet from the valve lock 146 goes into an oil ejector 150, where the line 152 is connecting into the oil sump 181. The oil ejector 150 is further connected to a line 148, which is directly connected to the pressure line 107 internally in the compressor module 104. The evaporator 112 comprises an evaporator customer outlet 160. Further, the evaporator 112 is connected to an evapo- rator customer inlet 162. The condenser 108 comprises a cooling media inlet 164 and a cooling media outlet 166. The cooling media inlet 164 is connected to a magnetic valve 168 and further to a cooling media pump 170. Further, line 172 is connecting the cooling media to the compressor 104, first to pass through an oil cooler 180. Further, the cooling media is sent into the compressor pump device 184 and to the electrical motor 186, from which electrical motor 186 the cooling media in a line 174 return to the cooling media outlet 166. Internally in the compressor block 104, a pressure sensor 188 and a temper- ature sensor 190 are further indicated. Further are indicated an oil sump 181 and an oil line 182 towards the compressor head covers 184. Further, at the pressure outlet of the compressor is indicated a pressure sensor 192, a temperature sensor 194, and a pressure switch 196. In operation a system as disclosed in figs. 3a and 3b, there will of course be an electronic control system, which at least are connected to the different sensors and also send con- trol signals to all the different electronic valves. The electronic device comprises a var- iable frequency drive 187 in order to generate variable frequencies to the motor. In that way, the motor and also the compressor will be able to operate with different capacity. This can be very important if the load of the cooling system varies. The evaporator outlet 160 could in fact be connected to a plurality of cooling devices, for example in a supermarket. Because the evaporator is formed as a heat exchanger, the media flowing
DK 180804 B1 7 in the connection 160 could be quite different from the refrigerant operating in the cool- ing system. Probably, the media in the line 160 could be carbon dioxide, which could be used as cooling media in for example a supermarket or in a production of for example meat. Other possibilities to send to the heat exchanger in the evaporator could be a brine, which is a salt contained in water, which can be a highly effective cooling media, for example inside the building. Fig. 4 shows a sectional view of a section of a tank 24. The heat exchanger 18 forms a plate heat exchanger with liquid refrigerant flowing inside the volume 26. The suction gas 20 is circulating around the inner tube 38 and the gas is forced to circulate by direc- tion plates 23. The circulating path 22 is formed in a tank 24, by a number of direction plates for generating a circulating path 22. The tank 24 further comprises a heat ex- changer 18 formed as a plate heat exchanger.
In operation the suction gas in the tank 24 will be let in at the top (fig. 2) and the inlet can be placed tangential to the wall of the tank 24, whereby a circulating starts. The circulation is further achieved by direction plates 23. The circulation of the suction gas results in that all liquid particles such as non-evaporated drops of refrigerant or drops of oil are forced into the heat exchanger 18. In the heat exchanger 18 the temperature 20 of the liquid refrigerant 10 will start evaporation of the liquid drops of refrigerant. The tank is so effective that flooded evaporators can be full flooded because this system can accept up to 10 % liquid in the suction gas.
A preferred refrigerant could be ammonia, but other media could also be used, for ex- ample carbon dioxide.
List of reference signs: Cooling system (2) Compressor (4) Compressor inlet (5) Condenser (8) Refrigerant liquid (10)
DK 180804 B1 8 Evaporator (12) Pressure reduction means (14) Expansion valve (16) Heat exchanger (18) Suction gas (20)
Circulating path (22) Directing plates (23) Formed in a tank (24) Hollow screw (26)
Inside (28) the hollow screw (26) Outside (30) the hollow screw (26) Inlet (32) for the refrigerant liquid (10) Outlet (34) for the refrigerant liquid (10) Inlet (36) for the suction gas (20)
Outlet (38) for the suction gas (20) Oil outlet (40) Cooling system (102) Compressor (104)
Compressor inlet (105) Compressor outlet (107) Condenser (108) Evaporator (112) Expansion valve (116)
Circulating path (122) Formed in a tank (124) Inlet (132) for the refrigerant liquid (10) Outlet (134) for the refrigerant liquid (10) Inlet (136) for the suction gas (20)
Outlet (138) for the suction gas (20) Oil outlet (140) Oil valve (142) Oil valve (144)
DK 180804 B1 9 Oil valve block (146) Line for pressured gas (148) Oil ejector (150) Oil return line (152)
Evaporator customer outlet (160) Evaporator customer inlet (162) Cooling media inlet (164)
Cooling media outlet (166) Magnetic valve (168)
Colling media pump (170) Cooling media compressor inlet (172) Cooling media compressor outlet (174) Oil cooler (180) Oil sump (181)
Compressor oil inlet (182) Compressor head covers (184) Electro motor (186) Variable frequency drive (187) Pressure sensor (188)
Temperature sensor (190) Pressure sensor (192) Temperature sensor (194) Pressure switch (196)

Claims (6)

DK 180804 B1 10 PATENTKRAVDK 180804 B1 10 PATENTKRAV 1. Et kølesystem (2) omfattende mindst en kompressor (4), mindst en kondensator (8), mindst et trykreducerende middel (14), såsom en ekspansionsventil (16), mindst en for- damper (12), mindst en varmeveksler (18) til opvarmning af udsugningsgassen (20) mellem fordamperen (12) og kompressorindløb (5), hvilken varmeveksler (18) omfatter en cirkulationsbane (22) til sugegassen (20) og for kølevæsken (10), kendetegnet ved at cirkulationsbanen (22) er dannet i en tank (24) ved brug af et antal af retningsplader, hvilken tank (24) yderligere omfatter en varmeveksler formet som en pladevarmeveks- ler.A cooling system (2) comprising at least one compressor (4), at least one condenser (8), at least one pressure reducing means (14), such as an expansion valve (16), at least one evaporator (12), at least one heat exchanger ( 18) for heating the exhaust gas (20) between the evaporator (12) and the compressor inlet (5), which heat exchanger (18) comprises a circulation path (22) for the suction gas (20) and for the coolant (10), characterized in that the circulation path (22) is formed in a tank (24) using a plurality of directional plates, the tank (24) further comprising a heat exchanger shaped as a plate heat exchanger. 2. Kølesystem i følge krav 1, kendetegnet ved, at tanken (24) omfatter en hul skrue (26), inden i (28) den hule skrue (26) er kølevæsken (10) tilpasset til at cirkulere, uden på (30) den hule skrue (26) er sugegassen (20) tilpasset til at cirkulere.Cooling system according to claim 1, characterized in that the tank (24) comprises a hollow screw (26), inside (28) the hollow screw (26) the coolant (10) is adapted to circulate, on the outside (30) the hollow screw (26) is the suction gas (20) adapted to circulate. 3. Kølesystem i følge krav 1 eller 2, kendetegnet ved, at tanken (24) omfatter et indløb (32) til kølevæsken (10) og et udløb (34) til kølevæsken (10), hvilken tank (24) omfatter et indløb (36) til sugegassen (20) og et udløb (38) til sugegassen (20).Cooling system according to claim 1 or 2, characterized in that the tank (24) comprises an inlet (32) for the coolant (10) and an outlet (34) for the coolant (10), which tank (24) comprises an inlet ( 36) to the suction gas (20) and an outlet (38) to the suction gas (20). 4. Kølesystem i følge et hvilket som helst af kravene 1-3, kendetegnet ved, at tanken (24) omfatter et olieudløb (40).Cooling system according to any one of claims 1-3, characterized in that the tank (24) comprises an oil outlet (40). 5. Fremgangsmåde til drift af et kølesystem som beskrevet i kravene 1-4, hvori kom- pressoren (4) generer tryk i en kølemiddelgas (6), hvilken kølemiddelgas (6) er konden- seret i en kondensator (8) til en kølevæske (10), hvilken kølevæske (10) er videreført til mindst en fordamper (12) gennem et trykreducerende middel (14), såsom en ekspansi- onsventil (16), hvori en varmeveksler (18) til opvarmning af sugegassen (20) er placeret mellem fordamperen (12) og kompressorindløbet (5), hvilken varmeveksler (18) er op- varmet af kølevæsken (10) kendetegnet ved, at varmeveksleren (18) tvinger sugegas- sen ind i en cirkulationsbane (22) til sugegas (20), og varmeveksleren (18) tvinger kø- levæsken (10) til at opvarme sugegassen (20).A method of operating a refrigeration system as described in claims 1-4, wherein the compressor (4) generates pressure in a refrigerant gas (6), which refrigerant gas (6) is condensed in a condenser (8) for a coolant (10), which coolant (10) is passed to at least one evaporator (12) through a pressure reducing means (14), such as an expansion valve (16), in which a heat exchanger (18) for heating the suction gas (20) is located between the evaporator (12) and the compressor inlet (5), which heat exchanger (18) is heated by the coolant (10), characterized in that the heat exchanger (18) forces the suction gas into a circulation path (22) for suction gas (20), and the heat exchanger (18) forces the coolant (10) to heat the suction gas (20). DK 180804 B1 11DK 180804 B1 11 6. Fremgangsmade i fglge krav 5, kendetegnet ved, at sugegassen (20) er tvunget ind i cirkulationsbanen (22) uden på (30) den hule skrue (26), og kølevæsken (10) er tvunget til at cirkulere inden i (28) den hule skrue (26).Method according to claim 5, characterized in that the suction gas (20) is forced into the circulation path (22) outside (30) the hollow screw (26), and the coolant (10) is forced to circulate inside (28). ) the hollow screw (26).
DKPA202070232A 2020-04-15 2020-04-15 Cooling system and a method for operating a cooling system DK180804B1 (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
DKPA202070232A DK180804B1 (en) 2020-04-15 2020-04-15 Cooling system and a method for operating a cooling system
EP21737556.7A EP4136395A1 (en) 2020-04-15 2021-04-15 Heat exchanger system
US17/918,640 US20230143388A1 (en) 2020-04-15 2021-04-15 Heat exchanger system
PCT/DK2021/050111 WO2021209111A1 (en) 2020-04-15 2021-04-15 Heat exchanger system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DKPA202070232A DK180804B1 (en) 2020-04-15 2020-04-15 Cooling system and a method for operating a cooling system

Publications (2)

Publication Number Publication Date
DK202070232A1 DK202070232A1 (en) 2021-10-29
DK180804B1 true DK180804B1 (en) 2022-04-05

Family

ID=76796871

Family Applications (1)

Application Number Title Priority Date Filing Date
DKPA202070232A DK180804B1 (en) 2020-04-15 2020-04-15 Cooling system and a method for operating a cooling system

Country Status (4)

Country Link
US (1) US20230143388A1 (en)
EP (1) EP4136395A1 (en)
DK (1) DK180804B1 (en)
WO (1) WO2021209111A1 (en)

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6523365B2 (en) * 2000-12-29 2003-02-25 Visteon Global Technologies, Inc. Accumulator with internal heat exchanger
US6463757B1 (en) * 2001-05-24 2002-10-15 Halla Climate Controls Canada, Inc. Internal heat exchanger accumulator
DE10348141B3 (en) * 2003-10-09 2005-02-03 Visteon Global Technologies, Inc., Dearborn Inner heat exchanger for high pressure cooling medium providing dual function as accumulator and cooling medium collector
CN100529598C (en) * 2004-07-09 2009-08-19 谷俊杰 Refrigeration system
FR2940419B1 (en) * 2008-12-22 2010-12-31 Valeo Systemes Thermiques COMBINED DEVICE COMPRISING AN INTERNAL HEAT EXCHANGER AND AN ACCUMULATOR, AND PROVIDED WITH A MULTIFUNCTIONAL INTERNAL COMPONENT
US20130299143A1 (en) * 2011-12-29 2013-11-14 Contitech Kuehner Gmbh & Cie. Kg Internal heat exchanger
US10429105B1 (en) * 2013-09-24 2019-10-01 National Technology & Engineering Solutions Of Sandia, Llc Heating and cooling devices, systems and related method
CN204923592U (en) * 2015-09-01 2015-12-30 南京冷德节能科技有限公司 Forced recirculation formula evaporimeter

Also Published As

Publication number Publication date
US20230143388A1 (en) 2023-05-11
EP4136395A1 (en) 2023-02-22
DK202070232A1 (en) 2021-10-29
WO2021209111A1 (en) 2021-10-21

Similar Documents

Publication Publication Date Title
AU2021212117B2 (en) Active/Passive Cooling System
KR101568200B1 (en) Multichannel heat exchanger with dissimilar tube spacing
US12127380B2 (en) Active/passive cooling system
KR20110100905A (en) Chiller
CA2631474A1 (en) Flow control of refrigerant
CN110462300B (en) Modular water side economizer for air cooled chiller
JP4595654B2 (en) Refrigeration cycle equipment
DK180804B1 (en) Cooling system and a method for operating a cooling system
US9243650B2 (en) Fin array for use in a centrifugal fan
CN109642760B (en) Refrigerant distributor for falling film evaporator
CN215951835U (en) Water chilling unit and refrigeration equipment
JP2018159496A (en) Condenser for compression refrigerator
KR102910547B1 (en) Active/Passive Cooling System
KR102417161B1 (en) Vapor compression cycle apparatus and water treatment system having the same
KR100581565B1 (en) Refrigerant Distribution Unit of Evaporator
JP2007057177A (en) Vapor compression type refrigerating cycle device
US20220307741A1 (en) Condenser
KR200267159Y1 (en) refrigeration system
Gardner Introduction to Industrial Refrigeration
KR20000045938A (en) Evaporative cooling type condenser
KR20140035640A (en) Evaporator and refrigerating machine using there of
KR19990034525A (en) Condenser of refrigerator
KR20240138139A (en) Refrigerant circulation device and refrigerant circulation method for lowering the receiver temperature of the refrigeration cycle system
GB2093535A (en) Means for cooling oil in a hermetic compressor
KR0176887B1 (en) Evaporator of refrigeration cycle

Legal Events

Date Code Title Description
PAT Application published

Effective date: 20211016

PME Patent granted

Effective date: 20220405