CN218380003U - Oil cooling system for refrigerating system and refrigerating system - Google Patents
Oil cooling system for refrigerating system and refrigerating system Download PDFInfo
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- CN218380003U CN218380003U CN202222517105.7U CN202222517105U CN218380003U CN 218380003 U CN218380003 U CN 218380003U CN 202222517105 U CN202222517105 U CN 202222517105U CN 218380003 U CN218380003 U CN 218380003U
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- 238000001816 cooling Methods 0.000 title claims abstract description 137
- 239000003921 oil Substances 0.000 claims abstract description 183
- 238000005057 refrigeration Methods 0.000 claims abstract description 85
- 239000010687 lubricating oil Substances 0.000 claims abstract description 43
- 238000005507 spraying Methods 0.000 claims abstract description 19
- 239000003507 refrigerant Substances 0.000 claims description 115
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 79
- 239000000498 cooling water Substances 0.000 claims description 19
- 239000007921 spray Substances 0.000 claims description 19
- 239000002826 coolant Substances 0.000 claims description 18
- 238000009434 installation Methods 0.000 abstract description 12
- 238000005516 engineering process Methods 0.000 abstract description 2
- 239000007788 liquid Substances 0.000 description 46
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 40
- 229910021529 ammonia Inorganic materials 0.000 description 20
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 description 15
- 230000009471 action Effects 0.000 description 13
- 238000001704 evaporation Methods 0.000 description 13
- 230000008020 evaporation Effects 0.000 description 13
- 230000000694 effects Effects 0.000 description 6
- WGCNASOHLSPBMP-UHFFFAOYSA-N hydroxyacetaldehyde Natural products OCC=O WGCNASOHLSPBMP-UHFFFAOYSA-N 0.000 description 6
- 230000008859 change Effects 0.000 description 5
- 238000006243 chemical reaction Methods 0.000 description 5
- 238000000034 method Methods 0.000 description 5
- 230000008569 process Effects 0.000 description 5
- 230000009286 beneficial effect Effects 0.000 description 4
- 230000005484 gravity Effects 0.000 description 4
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 2
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 2
- 238000009833 condensation Methods 0.000 description 2
- 230000005494 condensation Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000010354 integration Effects 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000010734 process oil Substances 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 239000011780 sodium chloride Substances 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000001050 lubricating effect Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000010913 used oil Substances 0.000 description 1
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Abstract
The utility model relates to a refrigeration technology field provides an oil cooling system and refrigerating system for refrigerating system, and oil cooling system includes: the system comprises an evaporative condenser, an oil cooler, an oil heat exchange pipeline and a first heat exchange pipe; the evaporative condenser comprises a box body, a second heat exchange tube and a spraying device, wherein the second heat exchange tube and the spraying device are sequentially arranged in the box body along the height direction of the box body; the first heat exchange tube is arranged in the box body, the oil cooler is arranged outside the box body, and the first heat exchange tube, the oil heat exchange pipeline and the oil cooler form a first refrigerating working medium cooling loop for cooling lubricating oil in the oil cooler; the second heat exchange tube, the compressor and the evaporator form a second refrigerating medium cooling loop for cooling a heat source of the refrigerating system, and the oil cooling system is independently arranged, so that the installation of an oil heat exchange pipeline is facilitated, and the cooling efficiency of lubricating oil is improved.
Description
Technical Field
The utility model relates to a refrigeration technology field especially relates to an oil cooling system and refrigerating system for refrigerating system.
Background
The compressor is an important part in a refrigeration system, lubricating oil plays roles of lubricating, sealing, cooling and the like in the compressor, and the lubricating oil is important for stable operation of the compressor. The heating temperature of the lubricating oil rises, the high-temperature lubricating oil carried by the exhaust gas of the compressor can be reused after being cooled and filtered, and the cooling of the lubricating oil is an important link in the work of the compressor.
Among refrigeration systems, the most commonly used oil cooling systems mainly include a water-cooled oil cooling system, an air-cooled oil cooling system, and a thermosiphon oil cooling system. The water-cooled oil cooling system needs to be separately provided with a cooling tower to cool water and is commonly used in a shipborne cold room cold storage; the air-cooled oil cooling system has larger cooling equipment size and is used for a refrigerating system with smaller refrigerating capacity; the thermosiphon oil cooling system is the most common oil cooling mode in the refrigeration system, but the installation requirement is higher, and the siphon tank, the oil cooler and the evaporative condenser need to meet the appropriate height difference, and the pipeline structure is complicated, and the cooling efficiency is not good.
SUMMERY OF THE UTILITY MODEL
The utility model provides an oil cooling system and refrigerating system for there is the not good problem of cooling efficiency in oil cooling system in solving current refrigerating system.
In a first aspect, the present invention provides an oil cooling system for a refrigeration system, including: the system comprises an evaporative condenser, an oil cooler, an oil heat exchange pipeline and a first heat exchange pipe;
the evaporative condenser comprises a box body, a second heat exchange tube and a spraying device, wherein the second heat exchange tube and the spraying device are sequentially arranged in the box body along the height direction of the box body;
the first heat exchange tube is arranged in the box body, the oil cooler is arranged outside the box body, and the first heat exchange tube, the oil heat exchange pipeline and the oil cooler form a first refrigerating working medium cooling loop for cooling lubricating oil in the oil cooler;
the second heat exchange tube is used for being connected with the compressor and the evaporator, and the second heat exchange tube, the compressor and the evaporator form a second refrigerating working medium cooling loop for cooling a heat source of the refrigerating system.
According to the utility model provides an oil cooling system for refrigerating system, the oil heat transfer pipeline includes first pipeline and second pipeline;
one end of the first pipeline is connected with an outlet of the first heat exchange pipe, and the other end of the first pipeline is connected with a refrigerating medium inlet of the oil cooler; one end of the second pipeline is connected with a refrigerating medium outlet of the oil cooler, and the other end of the second pipeline is connected with an inlet of the first heat exchange pipe.
According to the utility model provides a pair of an oil cooling system for refrigerating system, first pipeline includes first district section and the second district section that connects gradually, first district section with at least one of second district section sets up along vertical direction.
According to the utility model provides an oil cooling system for refrigerating system, the second pipeline includes the third section and the fourth section that connect gradually; at least one of the third section and the fourth section is disposed in a vertical direction.
According to the utility model provides a pair of an oil cooling system for refrigerating system, the top of box is equipped with the fan, first heat exchange tube is located the fan with between the spray set.
According to the utility model provides a pair of an oil cooling system for refrigerating system, oil cooling system still includes the coolant pump of year, the coolant pump of year is located oil heat exchange pipeline is last, the coolant pump of year is used for the drive coolant in the first refrigeration working medium cooling circuit flows.
According to the utility model provides a pair of an oil cooling system for refrigerating system, first heat exchange tube is located spray set's below, spray set can with the cooling water spray to first heat exchange tube.
According to the utility model provides a pair of an oil cooling system for refrigerating system, first heat exchange tube is located the top of second heat exchange tube.
According to the oil cooling system for the refrigerating system, the evaporative condenser further comprises a water supply assembly;
the water supply assembly comprises a water supply pipeline and a circulating water pump, one end of the water supply pipeline is connected with the bottom of the box body, the other end of the water supply pipeline is connected with the top of the box body, and the circulating water pump is arranged on the water supply pipeline.
In a second aspect, the present invention provides a refrigeration system, including an oil cooling system for a refrigeration system.
The utility model provides an oil cooling system and refrigerating system for refrigerating system, first heat exchange tube and second heat exchange tube are located in the box, and first heat exchange tube, oil heat transfer pipeline and oil cooler form first refrigeration working medium cooling circuit, and first refrigeration working medium circulates in first refrigeration working medium cooling circuit, realizes the cooling to lubricating oil; the second heat exchange tube, the compressor and the evaporator form a second refrigerating medium cooling loop, and the second refrigerating medium circularly flows in the second refrigerating medium cooling loop to cool a heat source of the refrigerating system. The oil cooling system is independently arranged, so that the installation of an oil heat exchange pipeline is facilitated, and the cooling efficiency of lubricating oil is improved.
Drawings
In order to more clearly illustrate the technical solutions of the present invention or the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
FIG. 1 is a schematic diagram of an oil cooling system for a refrigeration system according to the present invention;
fig. 2 is a second schematic structural diagram of an oil cooling system for a refrigeration system according to the present invention;
FIG. 3 is a third schematic view of an oil cooling system for a refrigeration system according to the present invention;
reference numerals: 1: an evaporative condenser; 101: a box body; 102: a second heat exchange tube; 1021: an inlet of the second heat exchange tube; 1022: an outlet of the second heat exchange tube; 103: a spraying device; 104: a reservoir; 105: a fan; 106: a water supply line; 107: a water circulating pump; 2: an oil cooler; 3: a first pipeline; 4: a second pipeline; 5: a first heat exchange tube; 501: an inlet of the first heat exchange tube; 502: an outlet of the first heat exchange tube; 6: a coolant pump.
Detailed Description
To make the objects, technical solutions and advantages of the present invention clearer, the drawings of the present invention are combined to clearly and completely describe the technical solutions of the present invention, and obviously, the described embodiments are some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.
An oil cooling system for a refrigeration system according to an embodiment of the present invention will be described with reference to fig. 1 to 3.
As shown in fig. 1, an embodiment of the present invention provides an oil cooling system for a refrigeration system, including: the system comprises an evaporative condenser 1, an oil cooler 2, an oil heat exchange pipeline and a first heat exchange pipe 5; the evaporative condenser 1 comprises a box body 101, a second heat exchange pipe 102 and a spraying device 103, wherein the second heat exchange pipe 102 and the spraying device 103 are sequentially arranged in the box body 101 along the height direction of the box body 101; the first heat exchange tube 5 is arranged in the box body 101, the oil cooler 2 is arranged outside the box body 101, and the first heat exchange tube 5, the oil heat exchange pipeline and the oil cooler 2 form a first refrigerating medium cooling loop for cooling lubricating oil in the oil cooler 2; the second heat exchange tube 102 is used for connecting with the compressor and the evaporator, and the second heat exchange tube 102, the compressor and the evaporator form a second refrigerant cooling loop for cooling a heat source of the refrigeration system.
Specifically, the evaporative condenser 1 includes a box 101, a second heat exchange tube 102 and a spraying device 103, the second heat exchange tube 102 and the spraying device 103 are sequentially arranged in the box 101 along a height direction of the box 101, a top of the box 101 is open, a fan 105 is installed at the top of the box 101, and the fan 105 may be an axial flow fan. The spray device 103 is connected to a water supply line 106, the water supply line 106 is used for supplying cooling water to the spray device 103, and the spray device 103 sprays the cooling water to the second heat exchange pipe 102. The bottom of the tank 101 is provided with a water reservoir 104, and the water reservoir 104 is used for storing cooling water.
The oil cooler 2 is located outside the case 101 and spaced from the case 101 while having a height difference between the oil cooler 2 and the first heat exchanging pipe 5, and the oil cooler 2 is located below the first heat exchanging pipe 5 in a vertical direction. The oil cooler 2 is provided with a refrigeration working medium inlet, a refrigeration working medium outlet, an oil inlet and an oil outlet, a refrigeration working medium pipeline is arranged inside the oil cooler 2, the two ends of the refrigeration working medium pipeline are provided with the refrigeration working medium inlet and the refrigeration working medium outlet, the refrigeration working medium filled in the refrigeration working medium pipeline is a refrigerant or a secondary refrigerant, and when the refrigeration working medium is the refrigerant, the refrigerant is defined as a first refrigerant.
The structure of the oil heat exchange pipeline is not particularly limited, for example, the oil heat exchange pipeline comprises a first pipeline 3 and a second pipeline 4 which are arranged at intervals. The first heat exchange tube 5 is arranged in the box body 101, one end of the first pipeline 3 is connected with an outlet 502 of the first heat exchange tube, and the other end of the first pipeline 3 is connected with a refrigerating working medium inlet of the oil cooler 2; one end of the second pipeline 4 is connected with a refrigerating medium outlet of the oil cooler 2, and the other end of the second pipeline 4 is connected with an inlet 501 of the first heat exchange pipe. Therefore, a first refrigerating working medium cooling loop is formed among the first heat exchange tube 5, the first pipeline 3, the oil cooler 2 and the second pipeline 4, and a first refrigerant circularly flows in the first refrigerating working medium cooling loop and can cool lubricating oil in the oil cooler 2.
An oil path of the compressor is connected with the oil cooler 2, one port of the oil path is connected with an oil inlet of the oil cooler 2, one port of the oil path is connected with an oil outlet of the oil cooler 2, lubricating oil in the oil path flows into the oil cooler 2 from an oil inlet of the oil cooler 2, high-temperature lubricating oil in the oil cooler 2 can exchange heat with a first refrigerant in a refrigeration working medium pipeline, the high-temperature lubricating oil is cooled, and the temperature is reduced.
An inlet 1021 of the second heat exchange tube is connected with an exhaust port of the compressor, an outlet 1022 of the second heat exchange tube is connected with the evaporator, and the evaporator is connected with an air inlet of the compressor. Therefore, a second refrigeration working medium cooling loop is formed among the second heat exchange tube 102, the evaporator and the compressor, and a second refrigerant circularly flows in the second refrigeration working medium cooling loop to absorb heat of a heat source of the refrigeration system, so that the refrigeration effect is achieved.
The operation of the oil cooling system will be described in detail below. The cooling water in the reservoir 104 is pumped by a circulating water pump 107 along a water supply line 106 to the spray device 103, and the spray device 103 has a plurality of nozzles through which the cooling water is sprayed onto the surface of the second heat exchange pipe 102 to form a thin water film. The fan 105 rotates to make the air entering the box 101 move from bottom to top in the vertical direction, and the water film on the surface of the second heat exchange pipe 102 is evaporated by the fast flowing air. The gas-state second refrigerant with high temperature and high pressure is discharged from the exhaust port of the compressor, the gas-state second refrigerant enters the second heat exchange tube 102 from the inlet 1021 of the second heat exchange tube, the gas-state second refrigerant is cooled and condensed into liquid-state second refrigerant under the action of water film evaporation and rapid air flow, the liquid-state second refrigerant flows out from the outlet 1022 of the second heat exchange tube, the liquid-state second refrigerant flows into the evaporator after flowing through the throttling valve, the evaporator absorbs heat of a heat source of the refrigeration system, the conversion of the second refrigerant between the liquid state and the gas state is realized, and the refrigeration effect of the heat source of the refrigeration system is achieved.
High-temperature lubricating oil discharged by the compressor is separated by the oil separator and then flows into the oil cooler 2 from an oil inlet of the oil cooler 2, the liquid first refrigerant in the oil cooler 2 exchanges heat with the high-temperature lubricating oil in the oil cooler 2, the lubricating oil is cooled, and the temperature is reduced. The first refrigerant in a partial liquid state absorbs the heat of the lubricating oil and is converted into the first refrigerant in a gaseous state, the first refrigerant in a liquid state flows in the first pipeline 3, and the first refrigerant in a gas-liquid mixed state flows in the second pipeline 4. The pure liquid first refrigerant flowing in the first pipeline 3 has a density difference with the gas-liquid mixed first refrigerant flowing in the second pipeline 4, the gaseous first refrigerant in the oil cooler 2 flows along the second pipeline 4 to enter the first heat exchange pipe 5 under the action of the density difference, the gaseous first refrigerant exchanges heat with air flowing at a high speed outside the first heat exchange pipe 5 and is converted into the liquid first refrigerant, the liquid first refrigerant flows through an outlet 502 of the first heat exchange pipe and flows into the oil cooler 2 under the action of gravity, and therefore the lubricating oil is cooled by the conversion of the first refrigerant between the liquid state and the gaseous state.
In the embodiment of the present invention, the first heat exchange tube 5 and the second heat exchange tube 102 are disposed in the box body 101, the first heat exchange tube 5, the oil heat exchange pipeline and the oil cooler 2 form a first refrigeration working medium cooling loop, and the first refrigerant circularly flows in the first refrigeration working medium cooling loop to cool the lubricating oil; the second heat exchange tube 102, the compressor and the evaporator form a second refrigerating medium cooling loop, a second refrigerant circularly flows in the second refrigerating medium cooling loop, cooling of a heat source of the refrigerating system is achieved, the oil cooling system is independently arranged, installation of an oil heat exchange pipeline is facilitated, and meanwhile cooling efficiency of lubricating oil is improved.
As shown in fig. 1, 2 and 3, in an alternative embodiment, the oil-heat exchange circuit comprises a first circuit 3 and a second circuit 4; one end of the first pipeline 3 is connected with an outlet 502 of the first heat exchange pipe, and the other end of the first pipeline is connected with a refrigerating medium inlet of the oil cooler 2; one end of the second pipeline 4 is connected with a refrigerating medium outlet of the oil cooler 2, and the other end is connected with an inlet 501 of the first heat exchange pipe.
Specifically, a first heat exchange tube 5 is arranged in the box body 101, one end of a first pipeline 3 is connected with an outlet 502 of the first heat exchange tube, and the other end of the first pipeline 3 is connected with a refrigerating medium inlet of the oil cooler 2; one end of the second pipeline 4 is connected with a refrigerating medium outlet of the oil cooler 2, and the other end of the second pipeline 4 is connected with an inlet 501 of the first heat exchange pipe. A first refrigerant cooling circuit is thus formed between the first heat exchanger tube 5, the first line 3, the oil cooler 2 and the second line 4.
The first pipeline 3 and the second pipeline 4 are arranged at intervals, the first pipeline 3 and the second pipeline 4 enable a proper height difference to be formed between the first heat exchange pipe 5 and the oil cooler 2, the pipeline structure is simple, and the structure of the oil cooling system is compact and integrated.
In an alternative embodiment, the first conduit 3 comprises a first section and a second section connected in series, at least one of the first section and the second section being arranged in a vertical direction.
Specifically, the first section may be disposed horizontally, the second section may be disposed vertically, one end of the first section is connected to the outlet 502 of the first heat exchange tube, the other end of the first section is connected to one end of the second section, and the other end of the second section is connected to the refrigerant inlet of the oil cooler 2. The second section is arranged vertically, so that the liquid first refrigeration working medium can smoothly flow to the oil cooler 2 under the action of gravity.
Further, one end of the first section is detachably connected with the outlet 502 of the first heat exchange tube, the other end of the first section is detachably connected with one end of the second section, and the other end of the second section is detachably connected with the refrigerant inlet of the oil cooler 2. The detachable connection is beneficial to the convenience of installation and detachment and is convenient to maintain.
In an alternative embodiment, the second conduit 4 comprises a third section and a fourth section connected in series; at least one of the third section and the fourth section is disposed in a vertical direction.
Specifically, the third section may be horizontally disposed, the fourth section may be vertically disposed, one end of the third section is connected to the inlet 501 of the first heat exchange tube, the other end of the third section is connected to one end of the second section, and the other end of the second section is connected to the refrigerant outlet of the oil cooler 2.
Further, one end of the third section is detachably connected with the inlet 501 of the first heat exchange tube, the other end of the third section is detachably connected with one end of the fourth section, and the other end of the fourth section is detachably connected with the refrigerant outlet of the oil cooler 2. The detachable connection is beneficial to the convenience of installation and detachment and is convenient to maintain.
Further, the first heat exchange tube 5 has a serpentine shape, and in the vertical direction, the outlet 502 of the first heat exchange tube is located below the inlet 501 of the first heat exchange tube, and the first section is located below the third section. Under the condition that the second section and the fourth section are both vertically arranged, the pipeline is facilitated to be compact.
Further, the pipe diameter size of the second pipeline 4 is larger than that of the first pipeline 3, the pipe diameter of the second pipeline 4 is larger, smooth flowing of the gaseous first refrigerant is facilitated, the pipe diameter of the first pipeline 3 is smaller, and smooth flowing of the liquid first refrigerant is met.
In an alternative embodiment, as shown in fig. 1, a blower 105 is provided on the top of the box 101, and the first heat exchanging pipe 5 is provided between the blower 105 and the spraying device 103.
Specifically, the top of box 101 is equipped with the fan, and the quantity of fan sets up according to actual demand, and first heat exchange tube 5 installs in spray set 103's top and is located the below of fan 105. The oil cooler 2 and the first heat exchange tube 5 have a height difference, and the value of the height difference is set according to actual requirements. The first heat exchange pipe 5 is positioned above the spray device 103, and the second heat exchange pipe 102 is positioned below the spray device 103.
The following describes the operation of the air-cooling type oil cooling system. The first refrigerant flowing in the first refrigeration working medium cooling loop is Freon or ammonia and the like, and the second refrigerant flowing in the second refrigeration working medium cooling loop is Freon or ammonia and the like. The circulating water pump 107 sucks cooling water from the water reservoir 104, the cooling water is pressurized and conveyed to the spraying device 103, the cooling water is sprayed to the surface of the second heat exchange pipe 102 through the nozzle to form a water film, the fan 105 rotates to accelerate the flow of air in the box body 101, the water film is evaporated under the action of fast flowing air, and heat is absorbed in the evaporation process. The high-temperature and high-pressure gaseous second refrigerant discharged by the compressor enters the second heat exchange tube 102 through the inlet 1021 of the second heat exchange tube, the gaseous second refrigerant is cooled and condensed into a liquid second refrigerant under the action of external water film evaporation and rapid air flow, the liquid second refrigerant flows out from the outlet 1022 of the second heat exchange tube, and the liquid second refrigerant flows into the evaporator after flowing through the throttle valve, so that the conversion of the second refrigerant between the liquid state and the gaseous state is realized, and the refrigeration effect on a heat source of a refrigeration system is achieved.
High temperature lubricating oil that compressor exhaust carried flows into oil cooler 2 in by the oil inlet of oil cooler 2, and the heat transfer of liquid first refrigerant in the oil cooler 2 and the high temperature lubricating oil in the oil cooler 2, liquid first refrigerant evaporation change into gaseous first refrigerant, and the heat of lubricating oil is absorbed in the evaporation process, and lubricating oil is cooled, and the temperature reduces, and low temperature lubricating oil is in the compressor by oil-out backward flow of oil cooler 2. The first refrigerant in a liquid state flows in the first pipeline 3, the first refrigerant in a gas-liquid mixed state flows in the second pipeline 4, specifically, the first refrigerant in a gas-liquid mixed state flows in the lower half part of the vertical section of the second pipeline 4, the first refrigerant in a gaseous state flows in the upper half part and the horizontal section of the vertical section of the second pipeline 4, the first refrigerant in a pure liquid state flowing in the first pipeline 3 and the first refrigerant in a gas-liquid mixed state flowing in the second pipeline 4 have a density difference, and the first refrigerant in a gaseous state in the oil cooler 2 flows along the second pipeline 4 under the density difference between the first pipeline 3 and the second pipeline 4 and enters the first heat exchange tube 5 from the inlet 501 of the first heat exchange tube under the action of the density difference between the first pipeline 3 and the second pipeline 4. The gaseous first refrigerant flowing into the first heat exchange tube 5 exchanges heat with air rapidly flowing outside the first heat exchange tube 5 and is condensed into a liquid first refrigerant, and the liquid first refrigerant flows into the oil cooler 2 along the first pipeline 3 under the action of gravity after flowing through the outlet 502 of the first heat exchange tube, so that the lubricating oil is circularly cooled.
In the embodiment of the present invention, a height difference is formed between the first heat exchange tube 5 and the oil cooler 2, a circulation loop of the first refrigerant is constructed by the first heat exchange tube 5, the first pipeline 3, the oil cooler 2 and the second pipeline 4, and a siphon tank is not required to be separately provided, so that the requirement for the installation height difference between the evaporative condenser 1 and the oil cooler 2 is reduced compared with the conventional siphon oil cooling system; meanwhile, the system pipeline is simplified, and the compactness and the integration of the whole structure are facilitated. According to the thermosiphon principle, the first refrigerant circulates in the first refrigerant cooling circuit without a drive pump and without external additional mechanical power input. The first refrigeration working medium cooling loop and the second refrigeration working medium cooling loop are mutually independent, the high-pressure liquid supply flow regulation of the refrigeration system cannot be influenced by the cooling load change of the lubricating oil, and the high-pressure liquid supply flow of the refrigeration system is stable. In addition, the first refrigerant flowing in the first refrigeration working medium cooling loop can use different kinds of Freon, and the refrigerant ammonia which is the same as the second refrigerant is avoided, so that the ammonia filling amount of the whole refrigeration system is reduced, the requirement of the related ammonia filling amount is met, and the ammonia reduction requirement is realized.
In an alternative embodiment, as shown in fig. 2, the oil cooling system further comprises a coolant pump 6, the coolant pump 6 is disposed in the oil heat exchange line, and the coolant pump 6 is used for driving coolant in the first refrigerant cooling circuit to flow.
Specifically, a coolant pump 6 is arranged on the first pipeline 3, the oil cooler 2, the first pipeline 3, the second pipeline 4, the coolant pump 6 and the first heat exchange pipe 5 form a first refrigeration working medium cooling loop, a first refrigeration working medium flowing in the first refrigeration working medium cooling loop is a coolant, and the coolant is water, saline water or other alcohol solutions. The description will be given by taking the coolant as an ethylene glycol solution.
The operation of another air-cooling type oil cooling system will be described below. The circulating water pump 107 sucks cooling water from the water reservoir 104, the cooling water is pressurized and conveyed to the spraying device 103, the cooling water is sprayed to the surface of the second heat exchange pipe 102 through the nozzle to form a water film, the fan rotates to accelerate the flow of air in the box body 101, the water film is evaporated under the action of fast flowing air, and heat is absorbed in the evaporation process. The high-temperature high-pressure gaseous second refrigerant discharged by the compressor enters the second heat exchange tube 102 through the inlet 1021 of the second heat exchange tube, the gaseous second refrigerant is cooled and condensed into a liquid second refrigerant under the action of water film evaporation and rapid air flow, the liquid second refrigerant flows out from the outlet 1022 of the second heat exchange tube, and the liquid second refrigerant flows into the evaporator after flowing through the throttle valve, so that the conversion of the second refrigerant between the liquid state and the gaseous state is realized, and the refrigeration effect of a heat source of a refrigeration system is achieved.
High-temperature lubricating oil carried by compressor exhaust flows into the oil cooler 2 from an oil inlet of the oil cooler 2, glycol solution in the oil cooler 2 exchanges heat with the high-temperature lubricating oil in the oil cooler 2, and high-temperature glycol solution after heat exchange is driven by the coolant-carrying pump 6 to flow along the second pipeline 4 and enter the first heat exchange tube 5 from an inlet 501 of the first heat exchange tube. The high-temperature glycol solution in the first heat exchange tube 5 exchanges heat with air flowing fast outside the first heat exchange tube 5 to be converted into low-temperature glycol solution, the low-temperature glycol solution flows out from an outlet 502 of the first heat exchange tube under the drive of the coolant carrying pump 6, enters the oil cooler 2 along the first pipeline 3, and is cooled by the circulating flow of the glycol solution.
A circulation loop of the secondary refrigerant is constructed by the first heat exchange tube 5, the third pipeline, the secondary refrigerant pump 6, the first pipeline 3, the oil cooler 2 and the second pipeline 4, a siphon tank is not needed, and compared with a traditional siphon oil cooling system, the requirement on the installation height between the evaporative condenser 1 and the oil cooler 2 is reduced; meanwhile, the system pipeline is simplified, and the compactness and the integration of the whole structure are facilitated. The first refrigeration working medium cooling loop and the second refrigeration working medium cooling loop are mutually independent, and the high-pressure liquid supply flow regulation of the refrigeration system cannot be influenced by the cooling load change of the lubricating oil. In addition, the first refrigeration working medium flowing in the first refrigeration working medium cooling loop does not use ammonia, so that the ammonia of the refrigerant which is the same as that of the second refrigerant is avoided, the ammonia filling amount of the whole refrigeration system is reduced, the requirement of the related ammonia filling amount is met, and the ammonia reducing requirement is realized.
The secondary refrigerant can be water, saline water or other alcohol solutions, is rich in source and is easy to fill in the refrigerating working medium pipeline of the oil cooler 2. The oil cooler 2 can accomplish filling of secondary refrigerant in the workshop of making, the installation scene only need to the pipeline connect can, easy standardized production uses the later stage to be convenient for maintain the maintenance.
In an alternative embodiment, as shown in fig. 3, the first heat exchange pipe 5 is provided below the shower device 103, and the shower device 103 can spray cooling water to the first heat exchange pipe 5.
Specifically, the first heat exchanging pipe 5 and the second heat exchanging pipe 102 are installed below the spray device 103, and there is a height difference between the oil cooler 2 and the first heat exchanging pipe 5. The first heat exchange pipe 5 and the second heat exchange pipe 102 can be arranged in parallel; the first heat exchanging pipe 5 can also be positioned above the second heat exchanging pipe 102 and below the spraying device 103.
The first heat exchange tube 5, the first pipeline 3, the oil cooler 2 and the second pipeline 4 form a first refrigeration working medium cooling loop, and a first refrigerant flowing in the first refrigeration working medium cooling loop is Freon or ammonia and the like.
The operation of the evaporation cooling type oil cooling system will be described below. The circulating water pump 107 sucks cooling water from the water reservoir 104, the cooling water is pressurized and conveyed to the spraying device 103, the cooling water is sprayed to the surface of the first heat exchange pipe 5 and the surface of the second heat exchange pipe 102 through the nozzles to form a water film, and the fan 105 rotates to accelerate the flow of air in the box body 101.
The water film on the surface of the second heat exchange tube 102 evaporates under the action of the fast flowing air, and absorbs heat in the evaporation process. The high-temperature and high-pressure gaseous second refrigerant discharged by the compressor enters the second heat exchange tube 102 through the inlet 1021 of the second heat exchange tube, the gaseous second refrigerant is cooled and condensed into a liquid second refrigerant under the action of external water film evaporation and rapid air flow, the liquid second refrigerant flows out from the outlet 1022 of the second heat exchange tube, and the liquid second refrigerant flows into the evaporator after flowing through the throttle valve, so that the conversion of the second refrigerant between the liquid state and the gaseous state is realized, and the refrigeration effect on a heat source of a refrigeration system is achieved.
High-temperature lubricating oil that compressor exhaust carried flows into oil cooler 2 in by the oil inlet of oil cooler 2, and liquid first refrigerant exchanges heat with the high-temperature lubricating oil in the oil cooler 2, and the evaporation of liquid first refrigerant turns into gaseous first refrigerant, and the heat of lubricating oil is absorbed in the evaporation process, and lubricating oil is cooled, and the temperature reduces, and low temperature lubricating oil is in the compressor by oil-out backward flow of oil cooler 2. The liquid first refrigerant flows in the first pipeline 3, the gas-liquid mixed first refrigerant flows in the second pipeline 4, the pure liquid first refrigerant flowing in the first pipeline 3 has a density difference with the gas-liquid mixed first refrigerant flowing in the second pipeline 4, and the gas first refrigerant in the oil cooler 2 flows along the second pipeline 4 under the effect of the density difference between the first pipeline 3 and the second pipeline 4 and enters the first heat exchange tube 5 from the inlet 501 of the first heat exchange tube. The gaseous first refrigerant flowing into the first heat exchange tube 5 exchanges heat with air and water films rapidly flowing outside the first heat exchange tube 5 through evaporation and then is condensed into a liquid first refrigerant, and the liquid first refrigerant flows into the oil cooler 2 along the first pipeline 3 under the action of gravity after flowing through the outlet 502 of the first heat exchange tube, so that the circulating cooling of the lubricating oil is realized.
The first heat exchange tube 5 and the oil cooler 2 have a height difference, a circulation loop of the first refrigerant is constructed through the first heat exchange tube 5, the first pipeline 3, the oil cooler 2 and the second pipeline 4, a siphon tank is not needed, and compared with a traditional siphon oil cooling system, the requirement on the installation height difference between the evaporative condenser 1 and the oil cooler 2 is reduced; meanwhile, the system pipeline is simplified, and the compactness and the simplification of the whole structure are facilitated. According to the thermosiphon principle, the first refrigerant circulates in the first refrigerant cooling circuit without a drive pump and without external additional mechanical power input. The first refrigeration working medium cooling loop and the second refrigeration working medium cooling loop are mutually independent, and the high-pressure liquid supply flow regulation of the refrigeration system cannot be influenced by the cooling load change of the lubricating oil. In addition, the first refrigerant flowing in the first refrigeration working medium cooling loop can use different kinds of Freon, and the refrigerant ammonia which is the same as the second refrigerant is avoided, so that the ammonia filling amount of the whole refrigeration system is reduced, the requirement of the related ammonia filling amount is met, and the ammonia reduction requirement is realized.
In an alternative embodiment, as shown in fig. 3, the first heat exchange tube 5 is disposed above the second heat exchange tube 102.
Specifically, the first heat exchange tube 5 is arranged above the second heat exchange tube 102, which is beneficial to the overall layout of the system, the height difference between the first heat exchange tube 5 and the oil cooler 2, and the smooth flow of the first refrigerant in the first refrigerant cooling circuit.
As shown in fig. 1, 2 and 3, in an alternative embodiment, the evaporative condenser 1 further comprises a water supply assembly; the water supply assembly comprises a water supply pipeline 106 and a circulating water pump 107, one end of the water supply pipeline 106 is connected with the bottom of the box body 101, the other end of the water supply pipeline 106 is connected with the top of the box body 101, and the circulating water pump 107 is arranged on the water supply pipeline 106.
Specifically, the water supply assembly includes a water supply line 106 and a circulation water pump 107, the water supply line 106 includes a water supply pipe and a water return pipe, and the circulation water pump 107 is installed between the water supply pipe and the water return pipe. The circulating water pump 107 is arranged at an interval with the bottom of the box body 101, one end of the water return pipe is communicated with the water reservoir 104 in the box body 101, and the other end of the water return pipe is communicated with an inlet of the circulating water pump 107. One end of the water supply pipe communicates with the outlet of the circulating water pump 107, and the other end of the water supply pipe communicates with the shower device 103. The circulating water pump 107 pumps the cooling water in the reservoir 104 to the spraying device 103 along the water return pipe and the water supply pipe, so that the circulating flow of the cooling water is realized, and the first heat exchange pipe 5 and the second heat exchange pipe 102 are sprayed.
The spray device 103 includes a plurality of nozzles, which are arranged at intervals. The plurality of nozzles may be disposed at intervals in the longitudinal direction of the case 101, or the plurality of nozzles may be disposed at intervals in the width direction of the case 101, or the plurality of nozzles may be disposed at intervals in both the longitudinal direction and the width direction of the case 101. The plurality of nozzles are beneficial to the spraying uniformity, so that the formation of water films on the surfaces of the first heat exchange tube 5 and the surface of the second heat exchange tube 102 is facilitated, the condensation efficiency of the first refrigerant in the first heat exchange tube 5 and the condensation efficiency of the second refrigerant in the second heat exchange tube 102 are facilitated to be guaranteed, and the stable operation of the refrigerating system is facilitated.
The embodiment of the utility model provides a still provide a refrigerating system, refrigerating system includes foretell oil cooling system.
The evaporative condenser 1 comprises a tank 101, a second heat exchange pipe 102, a spray device 103 and a water supply assembly. The top of the box 101 is provided with a fan 105, and the bottom of the box 101 is provided with a water reservoir 104. The second heat exchange tube 102 and the first heat exchange tube 5 are arranged in the box body 101, the first heat exchange tube 5, the oil heat exchange pipeline and the oil cooler 2 form a first refrigerating working medium cooling loop, the first refrigerating working medium can be a refrigerant or a secondary refrigerant, and the first refrigerating working medium circularly flows in the first refrigerating working medium cooling loop to cool lubricating oil. The second heat exchange tube 102, the compressor and the evaporator form a second refrigeration working medium cooling loop, and a second refrigerant circularly flows in the second refrigeration working medium cooling loop to realize cooling of a heat source of the refrigeration system. The first refrigerating medium cooling loop and the second refrigerating medium cooling loop are arranged independently, and the cooling efficiency of the lubricating oil is improved.
The first heat exchange tube 5 and the oil cooler 2 have a height difference, a first refrigeration working medium circulation loop is constructed through the first heat exchange tube 5, the first pipeline 3, the oil cooler 2 and the second pipeline 4, a siphon tank is not needed, and compared with a traditional siphon oil cooling system, the requirement on the installation height between the evaporative condenser 1 and the oil cooler 2 is reduced; meanwhile, the system pipeline is simplified, and the compactness and the simplification of the whole structure are facilitated.
The first refrigerant circularly flows in the first refrigerating working medium cooling loop without being provided with a driving pump and without external additional mechanical power input. The first refrigeration working medium cooling loop and the second refrigeration working medium cooling loop are mutually independent, and the high-pressure liquid supply flow regulation of the refrigeration system cannot be influenced by the cooling load change of the lubricating oil. In addition, the first refrigerant flowing in the first refrigeration working medium cooling loop can use Freon, the refrigerant ammonia which is the same as the second refrigerant is avoided, the ammonia filling amount of the whole refrigeration system is reduced, the requirement of the related ammonia filling amount is met, and the ammonia reducing requirement is realized.
The oil cooler 2 can accomplish filling of first refrigerant or secondary refrigerant in the workshop of making, the installation scene only need to the pipeline connect can, easy standardized production uses the later stage to be convenient for maintain the maintenance.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art will understand that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention in its corresponding aspects.
Claims (10)
1. An oil cooling system for a refrigeration system, comprising: the system comprises an evaporative condenser, an oil cooler, an oil heat exchange pipeline and a first heat exchange pipe;
the evaporative condenser comprises a box body, a second heat exchange tube and a spraying device, wherein the second heat exchange tube and the spraying device are sequentially arranged in the box body along the height direction of the box body;
the first heat exchange tube is arranged in the box body, the oil cooler is arranged outside the box body, and the first heat exchange tube, the oil heat exchange pipeline and the oil cooler form a first refrigerating working medium cooling loop for cooling lubricating oil in the oil cooler;
the second heat exchange tube is used for being connected with the compressor and the evaporator, and the second heat exchange tube, the compressor and the evaporator form a second refrigerating working medium cooling loop for cooling a heat source of the refrigerating system.
2. The oil cooling system for a refrigeration system of claim 1, wherein the oil heat exchange circuit includes a first circuit and a second circuit;
one end of the first pipeline is connected with an outlet of the first heat exchange pipe, and the other end of the first pipeline is connected with a refrigerating medium inlet of the oil cooler; one end of the second pipeline is connected with a refrigerating medium outlet of the oil cooler, and the other end of the second pipeline is connected with an inlet of the first heat exchange pipe.
3. The oil cooling system for a refrigeration system according to claim 2, wherein the first pipe includes a first section and a second section connected in series, at least one of the first section and the second section being disposed in a vertical direction.
4. The oil cooling system for a refrigeration system according to claim 2, wherein the second pipe includes a third section and a fourth section connected in series; at least one of the third section and the fourth section is disposed in a vertical direction.
5. The oil cooling system for a refrigerating system as recited in any one of claims 1 to 4, wherein a blower is provided at a top of the tank, and the first heat exchanging pipe is provided between the blower and the shower device.
6. The oil cooling system for a refrigeration system of claim 5, further comprising a coolant pump disposed in the oil heat exchange circuit, the coolant pump configured to drive coolant flow in the first refrigerant cooling circuit.
7. The oil cooling system for a refrigeration system according to any one of claims 1 to 4, wherein the first heat exchange pipe is provided below the spray device, and the spray device is capable of spraying cooling water to the first heat exchange pipe.
8. The oil cooling system for a refrigerating system as recited in claim 7, wherein the first heat exchanging pipe is provided above the second heat exchanging pipe.
9. The oil cooling system for a refrigerating system as recited in claim 1, wherein the evaporative condenser further comprises a water supply assembly;
the water supply assembly comprises a water supply pipeline and a circulating water pump, one end of the water supply pipeline is connected with the bottom of the box body, the other end of the water supply pipeline is connected with the top of the box body, and the circulating water pump is arranged on the water supply pipeline.
10. A refrigeration system comprising an oil cooling system for a refrigeration system according to any one of claims 1 to 9.
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CN202222517105.7U CN218380003U (en) | 2022-09-22 | 2022-09-22 | Oil cooling system for refrigerating system and refrigerating system |
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CN202222517105.7U CN218380003U (en) | 2022-09-22 | 2022-09-22 | Oil cooling system for refrigerating system and refrigerating system |
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