CN113790384A - Lubricating oil cooling system and heat pump unit - Google Patents
Lubricating oil cooling system and heat pump unit Download PDFInfo
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- CN113790384A CN113790384A CN202111054088.1A CN202111054088A CN113790384A CN 113790384 A CN113790384 A CN 113790384A CN 202111054088 A CN202111054088 A CN 202111054088A CN 113790384 A CN113790384 A CN 113790384A
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- lubricating oil
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16N—LUBRICATING
- F16N39/00—Arrangements for conditioning of lubricants in the lubricating system
- F16N39/02—Arrangements for conditioning of lubricants in the lubricating system by cooling
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- 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
- F25B30/00—Heat pumps
- F25B30/02—Heat pumps of the compression type
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- 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
- F25B31/00—Compressor arrangements
- F25B31/002—Lubrication
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- 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
- F25B41/00—Fluid-circulation arrangements
- F25B41/30—Expansion means; Dispositions thereof
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- 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
- F25B49/00—Arrangement or mounting of control or safety devices
- F25B49/02—Arrangement or mounting of control or safety devices for compression type machines, plants or systems
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- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
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Abstract
The invention discloses a lubricating oil cooling system and a heat pump unit, relates to the technical field of heat pump units, and solves the problems that the cooling system in the prior art cannot guarantee the cooling effect of lubricating oil and the reliability of the heat pump unit is influenced. The lubricating oil cooling system comprises an oil tank and a cooling assembly, wherein a first outlet of the oil tank is connected with an inlet of a part to be lubricated, and a first inlet of the oil tank is also connected with an outlet of the part to be lubricated; the cooling assembly is independently arranged relative to the heat pump body, the cooling assembly and the oil tank form a cooling loop, the cooling assembly and/or the oil tank are/is used for supplying cooling media or water to flow through, and the flowing cooling media or water and lubricating oil lubricated by the part to be lubricated directly or indirectly exchange heat in the oil tank or the cooling assembly. According to the lubricating oil cooling system, the temperature of the lubricating oil can be controlled within a reasonable range through the cooling assembly which is independently arranged relative to the heat pump body, and the cooling effect on the lubricating oil is ensured.
Description
Technical Field
The invention relates to the technical field of heat pump units, in particular to a lubricating oil cooling system and a heat pump unit comprising the lubricating oil cooling system.
Background
In a centrifugal heat pump unit, when a lubricating system works, lubricating oil lubricates a compressor bearing and takes away a large amount of heat generated by the compressor bearing, so that the temperature of the lubricating oil rises, in order to ensure the reliability of the lubricating system, the lubricating oil needs to be cooled, in the prior art, the lubricating oil is often cooled by a refrigerant, a liquid refrigerant is generally taken from the bottom of a condenser, and the refrigerant enters an oil tank after throttling to cool the lubricating oil.
Fig. 1 shows a schematic diagram of a prior art lubricating oil cooling system. As shown in fig. 1, in the centrifugal heat pump unit, the lubricant in the oil tank 101 is pressurized by the oil pump 201, enters the portion 202 to be lubricated (i.e. the compressor bearing) for lubrication, takes away the heat generated during the operation of the compressor bearing, and then returns to the oil tank 101, so that the temperature of the lubricant in the oil tank 101 is increased; in the prior art, lubricating oil is cooled by a refrigerant of a heat pump unit, a high-temperature liquid refrigerant is generally taken from the bottom of a condenser 203 and enters an oil tank 101 through throttling of a throttle valve, the refrigerant is evaporated and directly exchanges heat with the lubricating oil, the temperature of the lubricating oil is reduced, and an evaporated gaseous refrigerant returns to an evaporator 204. When the outlet water temperature of the condenser 203 and the evaporator 204 of the centrifugal heat pump unit is higher, the temperature of the liquid refrigerant obtained from the bottom of the condenser 203 is also higher, when the high-temperature liquid refrigerant is throttled by the throttle valve, latent heat is released, wherein most of cold energy is consumed to reduce the temperature of the refrigerant, and the rest of the cold refrigerant is used for lubricating oil cooling, at the moment, the lubricating oil cooling effect is poor, overtemperature and high-temperature protection occur, the unit cannot normally operate, and the reliability of the unit is influenced.
Therefore, there is an urgent need for improvement of the lubricating oil cooling system of the heat pump unit.
Disclosure of Invention
One of the purposes of the invention is to provide a lubricating oil cooling system and a heat pump unit, and solve the technical problems that in the prior art, the lubricating oil is cooled by a refrigerant led out from a condenser of the heat pump unit, the cooling effect of the lubricating oil cannot be guaranteed, and the reliability of the unit is influenced. The various technical effects that can be produced by the preferred technical solution of the present invention are described in detail below.
In order to achieve the purpose, the invention provides the following technical scheme:
the lubricating oil cooling system comprises an oil tank and a cooling assembly, wherein a first outlet of the oil tank is connected with an inlet of a part to be lubricated, and a first inlet of the oil tank is also connected with an outlet of the part to be lubricated; the cooling assembly is arranged independently relative to the heat pump body, the cooling assembly and the oil tank form a cooling loop, the cooling assembly and/or the oil tank are/is used for allowing a refrigerant or water to flow through, and the flowing refrigerant or water and lubricating oil lubricated on a part to be lubricated perform direct or indirect heat exchange in the oil tank or the cooling assembly.
According to a preferred embodiment, the cooling assembly comprises a cooling condenser, a throttle valve and a cooling compressor, wherein the throttle valve is arranged between an outlet of the cooling condenser and a second inlet of the oil tank, the cooling compressor is arranged between a second outlet of the oil tank and an inlet of the cooling condenser, and the cooling condenser, the throttle valve, the oil tank and the cooling compressor are used for circulating a cooling medium and directly exchanging heat with lubricating oil lubricated by a part to be lubricated in the oil tank by utilizing the circulating cooling medium.
According to a preferred embodiment, the refrigerant circulating in the cooling condenser, the throttle valve, the oil tank and the cooling compressor is of the same type as the refrigerant circulating in the heat pump body.
According to a preferred embodiment, the cooling assembly comprises a cooling condenser, a throttle valve, a cooling compressor and a cooling heat exchange coil, wherein the cooling heat exchange coil is arranged in the oil tank, the throttle valve is arranged between an outlet of the cooling condenser and an inlet of the cooling heat exchange coil, the cooling compressor is arranged between the outlet of the cooling heat exchange coil and the inlet of the cooling condenser, the throttle valve, the cooling heat exchange coil and the cooling compressor are used for circulating refrigerants, and indirect heat exchange is carried out on the cooling heat exchange coil by utilizing the circulating refrigerants and lubricating oil after lubricating a part to be lubricated.
According to a preferred embodiment, the refrigerant circulating in the cooling condenser, the throttle valve, the cooling heat exchange coil and the cooling compressor is the same as or different from the refrigerant circulating in the heat pump body.
According to a preferred embodiment, the cooling assembly comprises a cooling condenser, a throttle valve, a cooling compressor and a shell-and-tube oil cooler, wherein the shell-tube oil cooler is arranged between the oil tank and the part to be lubricated and is connected with the first inlet of the shell-tube oil cooler, the first outlet of the shell-and-tube oil cooler is connected with the first inlet of the oil tank, the throttle valve is arranged between the outlet of the cooling condenser and the second inlet of the shell-and-tube oil cooler, the cooling compressor is arranged between the second outlet of the shell-and-tube oil cooler and the inlet of the cooling condenser, and the cooling condenser, the throttle valve, the shell-and-tube oil cooler and the cooling compressor are used for circulating refrigerant, and the circulating refrigerant and the lubricating oil lubricated by the part to be lubricated carry out indirect heat exchange at the shell and tube oil cooler.
According to a preferred embodiment, the refrigerant circulating in the cooling condenser, the throttle valve, the shell-and-tube oil cooler and the cooling compressor is of the same or different type as the refrigerant circulating in the heat pump body.
According to a preferred embodiment, the cooling assembly comprises a water evaporation oil cooler, the water evaporation oil cooler is arranged between the oil tank and the part to be lubricated, an inlet of the water evaporation oil cooler is connected with the part to be lubricated, an outlet of the water evaporation oil cooler is connected with a first inlet of the oil tank, the water evaporation oil cooler is used for supplying water for circulation, and the circulated water and the lubricating oil lubricated by the part to be lubricated perform indirect heat exchange at the water evaporation oil cooler.
According to a preferred embodiment, the water evaporation oil cooler comprises a circulating water tank, a circulating water pump, a lubricating oil coil and an evaporation fan, wherein an inlet of the lubricating oil coil is connected with a part to be lubricated, and an outlet of the lubricating oil coil is connected with a first inlet of the oil tank; the circulating water tank is arranged at the bottom of the water evaporation oil cooler, the lubricating oil coil is arranged above the circulating water tank, a flow dividing part is also arranged above the lubricating oil coil, the circulating water pump is arranged between the circulating water tank and the flow dividing part, the circulating water tank, the circulating water pump and the flow dividing part are used for supplying water for circulation, and the circulating water and the lubricating oil lubricated by the part to be lubricated perform indirect heat exchange at the lubricating oil coil by utilizing the circulated water; the evaporation fan is arranged on the side face of the lubricating oil coil and enables the evaporation fan to supply air to the surface of the lubricating oil coil.
The heat pump unit comprises a heat pump body and a lubricating oil cooling system, wherein the lubricating oil cooling system is the lubricating oil cooling system in any technical scheme of the invention.
The lubricating oil cooling system and the heat pump unit provided by the invention at least have the following beneficial technical effects:
the lubricating oil cooling system comprises an oil tank and a cooling assembly, wherein the oil tank is used for storing lubricating oil; the relative heat pump body of cooling module independently sets up, and cooling module and oil tank form cooling circuit, cooling module and/or oil tank are used for supplying refrigerant or rivers to circulate, and utilize the refrigerant or water of circulation and treat that lubricating oil after the lubrication of lubricated portion carries out direct or indirect heat transfer in oil tank or cooling module, because the relative heat pump body of cooling module independently sets up, but make the refrigerant or the water of utilizing circulation in the cooling module can not be influenced by refrigerant temperature in the heat pump body when cooling lubricating oil, thereby can be with lubricating oil temperature control at reasonable within range, guarantee the cooling effect to lubricating oil.
The heat pump unit comprises the lubricating oil cooling system of any technical scheme, and the lubricating oil cooling system can control the temperature of the lubricating oil within a reasonable range, so that the cooling effect on the lubricating oil is ensured, the lubricating reliability of the lubricating oil on the heat pump body can be ensured, the stable operation of the heat pump body is ensured, and the reliability of the heat pump body is improved.
The lubricating oil cooling system and the heat pump unit solve the technical problems that in the prior art, the lubricating oil is cooled by the refrigerant led out from the condenser of the heat pump unit, the cooling effect of the lubricating oil cannot be guaranteed, and the reliability of the unit is influenced.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a schematic diagram of a prior art lubricating oil cooling system;
FIG. 2 is a schematic view of a first preferred embodiment of the oil cooling system of the present invention;
FIG. 3 is a schematic view of a second preferred embodiment of the oil cooling system of the present invention;
FIG. 4 is a schematic view of a third preferred embodiment of the oil cooling system of the present invention;
FIG. 5 is a schematic view of a preferred embodiment of the shell and tube oil cooler of the present invention;
FIG. 6 is a schematic view of a fourth preferred embodiment of a lubricating oil cooling system of the present invention.
In the figure: 101. an oil tank; 102. cooling the condenser; 103. a throttle valve; 104. cooling the compressor; 105. cooling the heat exchange coil; 106. a shell-and-tube oil cooler; 1061. a heat exchange pipe; 1062. a lubricating oil inlet; 1063. a lubricant outlet; 1064. a cooling refrigerant inlet; 1065. a cooling refrigerant outlet; 107. a water evaporation oil cooler; 1071. a circulating water tank; 1072. a water circulating pump; 1073. a lubricating oil coil; 1074. an evaporation fan; 201. an oil pump; 202. a portion to be lubricated; 203. a condenser; 204. an evaporator.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be described in detail below. It is to be understood that the described embodiments are merely exemplary of the invention, and not restrictive of the full scope of the invention. All other embodiments, which can be derived by a person skilled in the art from the examples given herein without any inventive step, are within the scope of the present invention.
The lubricating oil cooling system and the heat pump unit of the present invention will be described in detail with reference to fig. 2 to 6 and examples 1 and 2 of the specification.
Example 1
This embodiment will explain the lubricating oil cooling system of the present invention in detail.
The lubricating oil cooling system of the present embodiment includes an oil tank 101 and a cooling unit, as shown in fig. 2 to 6. Preferably, the first outlet of the oil tank 101 is connected to the inlet of the portion to be lubricated 202, and the first inlet of the oil tank 101 is also connected to the outlet of the portion to be lubricated 202. More preferably, the first outlet of the oil tank 101 is connected with the inlet of the portion to be lubricated 202 through an oil pump 201, and the first inlet of the oil tank 101 is further connected with the outlet of the portion to be lubricated 202, so as to pump the lubricating oil in the oil tank 101 to the portion to be lubricated 202 through the oil pump 201 and return the lubricating oil lubricated by the portion to be lubricated 202 to the oil tank 101, as shown in fig. 2 to 4 and 6. Preferably, the cooling assembly is independently arranged relative to the heat pump body, the cooling assembly and the oil tank 101 form a cooling loop, the cooling assembly and/or the oil tank 101 are used for allowing a cooling medium or water to flow through, and the flowing cooling medium or water and the lubricating oil lubricated by the part to be lubricated 202 perform direct or indirect heat exchange in the oil tank 101 or the cooling assembly, as shown in fig. 2 to 4 and fig. 6.
The lubricating oil cooling system of the embodiment comprises an oil tank 101 and a cooling assembly, wherein the oil tank 101 is used for storing lubricating oil; because the cooling assembly is independently arranged relative to the heat pump body, the lubricating oil can be cooled by utilizing the circulating refrigerant or water in the cooling assembly without being influenced by the temperature of the refrigerant in the heat pump body, so that the temperature of the lubricating oil can be controlled within a reasonable range, and the cooling effect on the lubricating oil is ensured. The lubricating oil cooling system of this embodiment promptly has solved and has utilized the refrigerant that draws from the condenser of heat pump set itself to advance the cooling to lubricating oil among the prior art, can not ensure the cooling effect of lubricating oil, influences the problem of unit reliability.
According to a preferred embodiment, the cooling assembly comprises a cooling condenser 102, a throttle valve 103 and a cooling compressor 104, as shown in fig. 2. Preferably, the throttle valve 103 is disposed between the outlet of the cooling condenser 102 and the second inlet of the oil tank 101, the cooling compressor 104 is disposed between the second outlet of the oil tank 101 and the inlet of the cooling condenser 102, and the cooling condenser 102, the throttle valve 103, the oil tank 101, and the cooling compressor 104 are configured to allow a refrigerant to flow therethrough, and to directly exchange heat with the lubricating oil lubricated by the portion to be lubricated 202 in the oil tank 101 by the flowing refrigerant, as shown in fig. 2. More preferably, the refrigerant flowing through the cooling condenser 102, the throttle valve 103, the oil tank 101, and the cooling compressor 104 is the same type as the refrigerant flowing through the heat pump main body.
Referring to fig. 2, the lubricating oil cooling system of the preferred embodiment of the present invention cools the lubricating oil by: the oil pump 201 pumps the lubricating oil in the oil tank 101 to the part to be lubricated 202, lubricates the part to be lubricated 202 with the lubricating oil, and returns the lubricating oil lubricated by the part to be lubricated 202 to the oil tank 101; the cooling condenser 102, the throttle valve 103, the oil tank 101 and the cooling compressor 104 are used for circulation of cooling medium, the cooling compressor 104 compresses the gaseous refrigerant flowing out of the oil tank 101, the gaseous refrigerant enters the cooling condenser 102, the gaseous refrigerant is condensed into liquid in the cooling condenser 102, then the liquid refrigerant is throttled by the throttle valve 103 and enters the oil tank 101, the liquid refrigerant is evaporated in the oil tank 101 and directly exchanges heat with lubricating oil to reduce the temperature of the lubricating oil, and the evaporated gaseous refrigerant is compressed by the cooling compressor 104 and enters the next cycle. The arrows in fig. 2 indicate the flow direction of the refrigerant and the lubricant.
The lubricating oil cooling system of the preferred technical scheme of this embodiment utilizes the refrigerant of circulation and the lubricating oil of treating lubricated portion 202 lubrication back to carry out direct heat transfer, need not any heat transfer part, has the effectual advantage of heat transfer. On the other hand, the refrigerant and the lubricating oil are directly heat-exchanged, and there may be a problem that the lubricating oil entrains the refrigerant, and in the preferred technical scheme of this embodiment, the refrigerant circulating in the cooling condenser 102, the throttle valve 103, the oil tank 101 and the cooling compressor 104 is the same as the refrigerant circulating in the heat pump body in type, so that the problem that the refrigerant entrained in the lubricating oil flows to the heat pump body to affect the performance of the heat pump body can be avoided.
According to a preferred embodiment, the cooling assembly includes a cooling condenser 102, a throttle valve 103, a cooling compressor 104, and a cooling heat exchange coil 105, as shown in FIG. 3. Preferably, the cooling heat exchange coil 105 is disposed in the oil tank 101, the throttle valve 103 is disposed between an outlet of the cooling condenser 102 and an inlet of the cooling heat exchange coil 105, the cooling compressor 104 is disposed between an outlet of the cooling heat exchange coil 105 and an inlet of the cooling condenser 102, and the cooling condenser 102, the throttle valve 103, the cooling heat exchange coil 105 and the cooling compressor 104 are configured to circulate a cooling medium, and indirectly exchange heat with the lubricating oil lubricated by the portion to be lubricated 202 at the cooling heat exchange coil 105 by using the circulating cooling medium, as shown in fig. 3. More preferably, the refrigerant circulating through the cooling condenser 102, the throttle valve 103, the cooling heat exchange coil 105, and the cooling compressor 104 is the same as or different from the refrigerant circulating through the heat pump body. The cooling heat exchange coil 105 of the preferred technical scheme of this embodiment can be a light-removing pipe, or a high-efficiency heat exchange pipe with heat exchange teeth on the outer wall and the inner wall of the pipe.
Referring to fig. 3, the lubricating oil cooling system of the preferred embodiment of the present invention cools the lubricating oil by: the oil pump 201 pumps the lubricating oil in the oil tank 101 to the part to be lubricated 202, lubricates the part to be lubricated 202 with the lubricating oil, and returns the lubricating oil lubricated by the part to be lubricated 202 to the oil tank 101; the cooling condenser 102, the throttle valve 103, the cooling heat exchange coil 105 and the cooling compressor 104 are used for circulation of cooling medium, the cooling compressor 104 compresses the gaseous refrigerant flowing out of the cooling heat exchange coil 105, the gaseous refrigerant enters the cooling condenser 102, the gaseous refrigerant is condensed into liquid in the cooling condenser 102, the liquid refrigerant is throttled by the throttle valve 103 and then enters the cooling heat exchange coil 105, the liquid refrigerant evaporates in the cooling heat exchange coil 105, indirect heat exchange is performed between the wall of the cooling heat exchange coil 105 and lubricating oil in the oil tank 101, the temperature of the lubricating oil is reduced, and the evaporated gaseous refrigerant is compressed by the cooling compressor 104 and enters the next cycle. The arrows in fig. 3 indicate the flow direction of the refrigerant and the lubricant.
The lubricating oil cooling system of the preferred technical scheme of this embodiment, adopt independent refrigeration cycle refrigerant to carry out the heat exchange with the lubricating oil in the oil tank 101 through the pipe wall of cooling heat transfer coil 105 is indirect, reduce the temperature of lubricating oil, because adopt cooling heat transfer coil 105 to carry out indirect heat transfer, realized that the refrigerant that circulates among the cooling unit is totally independent with heat pump set main refrigeration (heating) system, the two can not cause mutual interference, can make the refrigerant that circulates among cooling condenser 102, choke valve 103, cooling heat transfer coil 105 and the cooling compressor 104 the same with the refrigerant type that circulates among the heat pump body or different. In the preferred technical scheme of this embodiment, the types of the refrigerant flowing through the cooling condenser 102, the throttle valve 103, the cooling heat exchange coil 105 and the cooling compressor 104 may be the same as or different from the type of the refrigerant flowing through the heat pump body, so that the refrigerant flowing through the cooling assembly has high flexibility and wide range of selection, and meanwhile, the appliances such as the cooling condenser 102, the throttle valve 103 and the cooling compressor 104 have wide selection spaces.
According to a preferred embodiment, the cooling assembly includes a cooling condenser 102, a throttle valve 103, a cooling compressor 104, and a shell and tube oil cooler 106, as shown in FIG. 4. Preferably, the shell-and-tube oil cooler 106 is disposed between the oil tank 101 and the portion to be lubricated 202, the first inlet of the shell-and-tube oil cooler 106 is connected to the portion to be lubricated 202, the first outlet of the shell-and-tube oil cooler 106 is connected to the first inlet of the oil tank 101, the throttle valve 103 is disposed between the outlet of the cooling condenser 102 and the second inlet of the shell-and-tube oil cooler 106, the cooling compressor 104 is disposed between the second outlet of the shell-and-tube oil cooler 106 and the inlet of the cooling condenser 102, and the cooling condenser 102, the throttle valve 103, the shell-and-tube oil cooler 106 and the cooling compressor 104 are configured to circulate a refrigerant, and indirectly exchange heat between the circulated refrigerant and the lubricating oil lubricated by the portion to be lubricated 202 at the shell-and-tube oil cooler 106, as shown in fig. 4. More preferably, the refrigerant flowing through the cooling condenser 102, the throttle valve 103, the shell-and-tube oil cooler 106, and the cooling compressor 104 is the same as or different from the refrigerant flowing through the heat pump main body.
Referring to fig. 4 and 5, the lubricating oil cooling system of the preferred embodiment cools the lubricating oil as follows: the oil pump 201 pumps the lubricating oil in the oil tank 101 to the part to be lubricated 202, the part to be lubricated 202 is lubricated by the lubricating oil, and the lubricating oil lubricated by the part to be lubricated 202 enters the heat exchange tube 1061 of the shell-and-tube oil cooler 106 through the first inlet (i.e. the lubricating oil inlet 1062) of the shell-and-tube oil cooler 106; meanwhile, the cooling condenser 102, the throttle valve 103, the shell-and-tube oil cooler 106 and the cooling compressor 104 are used for cooling medium circulation, the cooling compressor 104 compresses a gaseous refrigerant flowing out of the shell-and-tube oil cooler 106, the gaseous refrigerant enters the cooling condenser 102, the gaseous refrigerant is condensed into a liquid state in the cooling condenser 102, the liquid refrigerant is throttled by the throttle valve 103 and then enters the shell-and-tube oil cooler 106 through a second inlet (namely a cooling refrigerant inlet 1064) of the shell-and-tube oil cooler 106, the liquid refrigerant is immersed in the heat exchange tube 1061, in the shell-and-tube oil cooler 106, the liquid refrigerant outside the heat exchange tube 1061 is evaporated and changed into the gaseous refrigerant, heat is absorbed, indirect heat exchange is carried out with lubricating oil in the shell-and-tube oil cooler 106 through the tube wall of the shell-and-tube oil cooler 106, and the temperature of the lubricating oil is reduced; the lubricant oil with the lowered temperature flows out of the shell-and-tube oil cooler 106 through the first outlet (i.e., the lubricant oil outlet 1063) of the shell-and-tube oil cooler 106 and returns to the oil tank 101, and the evaporated gaseous refrigerant flows out of the shell-and-tube oil cooler 106 through the second outlet (i.e., the cooling refrigerant outlet 1065) of the shell-and-tube oil cooler 106 and is compressed by the cooling compressor 104, and then enters the next cycle. The arrows in fig. 4 and 5 indicate the flow direction of the refrigerant and the lubricant.
The heat exchange tube 1061 of the preferred technical solution of this embodiment may be a light-removing tube, or an efficient heat exchange tube with heat exchange teeth on the outer wall and the inner wall of the tube.
In the lubricating oil cooling system of the preferred technical scheme of this embodiment, the independent refrigeration cycle refrigerant is adopted to indirectly exchange heat with the lubricating oil in the heat exchange tube 1061 of the shell-and-tube oil cooler 106 through the tube wall of the shell-and-tube oil cooler 106, so as to reduce the temperature of the lubricating oil, and the shell-and-tube oil cooler 106 is adopted to indirectly exchange heat, so that the refrigerant circulating in the cooling assembly is completely independent from the main refrigeration (heating) system of the heat pump unit, and the refrigerant and the main refrigeration (heating) system do not interfere with each other, and the types of the refrigerant circulating in the cooling condenser 102, the throttle valve 103, the shell-and-tube oil cooler 106 and the cooling compressor 104 can be the same as or different from the refrigerant circulating in the heat pump body. In the preferred technical scheme of this embodiment, the types of the refrigerant flowing through the cooling condenser 102, the throttle valve 103, the shell-and-tube oil cooler 106 and the cooling compressor 104 may be the same as or different from the type of the refrigerant flowing through the heat pump body, so that the refrigerant flowing through the cooling assembly has high flexibility and a wide range of selection, and meanwhile, the appliances such as the cooling condenser 102, the throttle valve 103 and the cooling compressor 104 have wide selection spaces.
According to a preferred embodiment, the cooling assembly comprises a water evaporation oil cooler 107, as shown in fig. 6. Preferably, the water evaporation oil cooler 107 is disposed between the oil tank 101 and the portion to be lubricated 202, an inlet of the water evaporation oil cooler 107 is connected to the portion to be lubricated 202, an outlet of the water evaporation oil cooler 107 is connected to the first inlet of the oil tank 101, the water evaporation oil cooler 107 is used for supplying water to circulate, and indirect heat exchange is performed between the circulating water and the lubricating oil lubricated by the portion to be lubricated 202 at the water evaporation oil cooler 107, as shown in fig. 6. More preferably, the water evaporation oil cooler 107 comprises a circulating water tank 1071, a circulating water pump 1072, a lubricating oil coil 1073 and an evaporation fan 1074, wherein an inlet of the lubricating oil coil 1073 is connected with the part to be lubricated 202, and an outlet of the lubricating oil coil 1073 is connected with a first inlet of the oil tank 101; the circulating water tank 1071 is arranged at the bottom of the water evaporation oil cooler 107, the lubricating oil coil 1073 is arranged above the circulating water tank 1071, a flow dividing part is further arranged above the lubricating oil coil 1073, the circulating water pump 1072 is arranged between the circulating water tank 1071 and the flow dividing part, the circulating water tank 1071, the circulating water pump 1072 and the flow dividing part are used for supplying water for circulation, and the circulating water and the lubricating oil lubricated by the part to be lubricated 202 are used for indirectly exchanging heat at the lubricating oil coil 1073; the evaporation fan 1074 is provided on the side surface of the lubricating oil coil 1073, and causes the evaporation fan 1074 to blow air to the surface of the lubricating oil coil 1073, as shown in fig. 6. Particularly preferably, the evaporation fan 1074 is disposed behind the lubricating oil coil 1073.
Referring to fig. 6, the lubricating oil cooling system of the preferred embodiment of the present invention cools the lubricating oil by: the oil pump 201 pumps the lubricating oil in the oil tank 101 to the part to be lubricated 202, the part to be lubricated 202 is lubricated by the lubricating oil, and the lubricating oil lubricated by the part to be lubricated 202 enters the lubricating oil coil 1073 of the water evaporation oil cooler 107; circulating water tank 1071, circulating water pump 1072 and reposition of redundant personnel portion are used for the water circulation, circulating water pump 1072 sends the water pump in the circulating water tank 1071 to water evaporation oil cooler 107 top, and be several tributaries through reposition of redundant personnel, water soaks the lubricating oil coil 1073 surface along the tributary, evaporating fan 1074 sets up in the rear of lubricating oil coil 1073, evaporating fan 1074 supplies air to lubricating oil coil 1073 surface, the water of soakage to lubricating oil coil 1073 surface evaporates rapidly, take away the heat, make the lubricating oil in lubricating oil coil 1073 obtain the cooling, the lubricating oil after the cooling gets back to in the oil tank 101 through lubricating oil coil 1073's export, get into next circulation. The arrows in fig. 6 indicate the flow direction of the refrigerant and the lubricant.
The lubricating oil cooling system of the preferred technical scheme of this embodiment adopts water evaporation cooling lubricating oil, utilizes water evaporation heat absorption to take away lubricating oil heat, need not to set up independent refrigeration cycle system, does not relate to independent gaseous state sealed, control simple, safe and reliable, can effectively realize the cooling of lubricating oil. On the other hand, the lubricating oil cooling system of the preferred technical scheme of this embodiment indirectly exchanges heat with the lubricating oil in the lubricating oil coil 1073 through the pipe wall of the lubricating oil coil 1073 of the water evaporation oil cooler 107, reduces the temperature of the lubricating oil, and because the lubricating oil coil 1073 is used for indirect heat exchange, the complete independence of water and the main refrigeration (heating) system of the heat pump unit is realized, and the two systems cannot cause mutual interference.
Example 2
This embodiment will explain the heat pump unit of the present invention in detail.
The heat pump unit of this embodiment includes heat pump body and lubricating oil cooling system. Preferably, the lubricating oil cooling system is the lubricating oil cooling system according to any one of the embodiments 1. More preferably, the portion to be lubricated 202 is a compressor bearing. The heat pump body can be the same as the structure in the prior art, and the detailed description is omitted.
The heat pump unit of this embodiment, including the lubricating oil cooling system of any one of technical scheme in embodiment 1, because lubricating oil cooling system can be with lubricating oil temperature control in reasonable within range, guarantee the cooling effect to lubricating oil to can guarantee lubricating oil to the lubricated reliability of heat pump body, ensure heat pump body steady operation, improve the reliability of heat pump body. The heat pump unit of this embodiment promptly has solved and has utilized the refrigerant that draws from the condenser of heat pump unit itself to advance the cooling to lubricating oil among the prior art, can not ensure the cooling effect of lubricating oil, influences the technical problem of unit reliability.
In the description of the present invention, it is to be noted that, unless otherwise specified, "a plurality" means two or more; the terms "upper", "lower", "left", "right", "inner", "outer", "front", "rear", "head", "tail", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are only for convenience in describing and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and thus, should not be construed as limiting the invention. Furthermore, the terms "first," "second," "third," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; may be directly connected or indirectly connected through an intermediate. The specific meaning of the above terms in the present invention can be understood as appropriate to those of ordinary skill in the art.
The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention, and all the changes or substitutions should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the appended claims.
Claims (10)
1. A lubrication oil cooling system, characterized by comprising an oil tank (101) and a cooling assembly, wherein a first outlet of the oil tank (101) is connected with an inlet of a part to be lubricated (202), and a first inlet of the oil tank (101) is also connected with an outlet of the part to be lubricated (202);
the cooling assembly is independently arranged relative to the heat pump body, the cooling assembly and the oil tank (101) form a cooling loop, the cooling assembly and/or the oil tank (101) are/is used for allowing a cooling medium or water to flow through, and the flowing cooling medium or water and lubricating oil lubricated by the part to be lubricated (202) perform direct or indirect heat exchange in the oil tank (101) or the cooling assembly.
2. Lubricating oil cooling system according to claim 1, characterised in that the cooling package comprises a cooling condenser (102), a throttle valve (103) and a cooling compressor (104), wherein the throttle valve (103) is arranged between the outlet of the cooling condenser (102) and the second inlet of the oil tank (101), the cooling compressor (104) is arranged between the second outlet of the oil tank (101) and the inlet of the cooling condenser (102), and
the cooling condenser (102), the throttle valve (103), the oil tank (101) and the cooling compressor (104) are used for circulating cooling medium, and the circulating cooling medium and lubricating oil lubricated by the part to be lubricated (202) directly exchange heat in the oil tank (101).
3. The oil cooling system according to claim 2, wherein the cooling medium circulating in the cooling condenser (102), the throttle valve (103), the oil tank (101) and the cooling compressor (104) is of the same type as the cooling medium circulating in the heat pump body.
4. The lubrication oil cooling system according to claim 1, wherein the cooling assembly comprises a cooling condenser (102), a throttle valve (103), a cooling compressor (104) and a cooling heat exchange coil (105), wherein the cooling heat exchange coil (105) is arranged within the oil tank (101), the throttle valve (103) is arranged between an outlet of the cooling condenser (102) and an inlet of the cooling heat exchange coil (105), the cooling compressor (104) is arranged between an outlet of the cooling heat exchange coil (105) and an inlet of the cooling condenser (102), and
the cooling condenser (102), the throttle valve (103), the cooling heat exchange coil (105) and the cooling compressor (104) are used for circulating a cooling medium, and indirect heat exchange is carried out on lubricating oil lubricated by the part to be lubricated (202) at the cooling heat exchange coil (105) by utilizing the circulating cooling medium.
5. The oil cooling system according to claim 4, wherein the cooling medium circulating in the cooling condenser (102), the throttle valve (103), the cooling heat exchange coil (105) and the cooling compressor (104) is of the same type or different type as the cooling medium circulating in the heat pump body.
6. Lubricating oil cooling system according to claim 1, characterised in that the cooling assembly comprises a cooling condenser (102), a throttle valve (103), a cooling compressor (104) and a shell-and-tube oil cooler (106), wherein the shell-and-tube oil cooler (106) is arranged between the oil tank (101) and the portion to be lubricated (202) and connects a first inlet of the shell-and-tube oil cooler (106) with the portion to be lubricated (202), a first outlet of the shell-and-tube oil cooler (106) is connected with a first inlet of the oil tank (101),
the throttle valve (103) is disposed between an outlet of the cooling condenser (102) and a second inlet of the shell-and-tube oil cooler (106), the cooling compressor (104) is disposed between a second outlet of the shell-and-tube oil cooler (106) and an inlet of the cooling condenser (102), and
the cooling condenser (102), the throttle valve (103), the shell-and-tube oil cooler (106) and the cooling compressor (104) are used for circulating a cooling medium, and indirect heat exchange is carried out on the lubricating oil lubricated by the part to be lubricated (202) at the shell-and-tube oil cooler (106) by utilizing the circulating cooling medium.
7. The oil cooling system according to claim 6, wherein the cooling refrigerant circulating in the cooling condenser (102), the throttle valve (103), the shell-and-tube oil cooler (106) and the cooling compressor (104) is of the same type as or different from the type of the cooling refrigerant circulating in the heat pump body.
8. Lubricating oil cooling system according to claim 1, characterised in that the cooling assembly comprises a water evaporation oil cooler (107), the water evaporation oil cooler (107) being arranged between the oil tank (101) and the part to be lubricated (202) and connecting the inlet of the water evaporation oil cooler (107) with the part to be lubricated (202), the outlet of the water evaporation oil cooler (107) being connected with the first inlet of the oil tank (101), and that the cooling assembly comprises a water evaporation oil cooler (107), the outlet of which is connected with the first inlet of the oil tank (101), and
the water evaporation oil cooler (107) is used for supplying water for circulation, and indirect heat exchange is carried out on the lubricating oil lubricated by the part to be lubricated (202) and the circulating water at the water evaporation oil cooler (107).
9. The oil cooling system according to claim 8, wherein the water evaporation oil cooler (107) comprises a circulation water tank (1071), a circulation water pump (1072), a lubricating oil coil (1073) and an evaporation fan (1074), wherein the inlet of the lubricating oil coil (1073) is connected to the part to be lubricated (202) and the outlet of the lubricating oil coil (1073) is connected to the first inlet of the oil tank (101);
the circulating water tank (1071) is arranged at the bottom of the water evaporation oil cooler (107), the lubricating oil coil (1073) is arranged above the circulating water tank (1071), a shunting part is further arranged above the lubricating oil coil (1073), the circulating water pump (1072) is arranged between the circulating water tank (1071) and the shunting part, the circulating water tank (1071), the circulating water pump (1072) and the shunting part are used for supplying water for circulation, and the circulating water and the lubricating oil lubricated by the part to be lubricated (202) are used for indirectly exchanging heat at the lubricating oil coil (1073); the evaporation fan (1074) is provided on the side surface of the lubricating oil coil (1073) and causes the evaporation fan (1074) to blow air to the surface of the lubricating oil coil (1073).
10. A heat pump unit comprising a heat pump body and a lubricating oil cooling system, wherein the lubricating oil cooling system is as claimed in any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111054088.1A CN113790384A (en) | 2021-09-09 | 2021-09-09 | Lubricating oil cooling system and heat pump unit |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111054088.1A CN113790384A (en) | 2021-09-09 | 2021-09-09 | Lubricating oil cooling system and heat pump unit |
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| Publication Number | Publication Date |
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| CN113790384A true CN113790384A (en) | 2021-12-14 |
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| CN202111054088.1A Pending CN113790384A (en) | 2021-09-09 | 2021-09-09 | Lubricating oil cooling system and heat pump unit |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116608602A (en) * | 2023-07-20 | 2023-08-18 | 荏原冷热系统（中国）有限公司 | Centrifugal unit and control method thereof |
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2021
- 2021-09-09 CN CN202111054088.1A patent/CN113790384A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116608602A (en) * | 2023-07-20 | 2023-08-18 | 荏原冷热系统（中国）有限公司 | Centrifugal unit and control method thereof |
| CN116608602B (en) * | 2023-07-20 | 2023-10-13 | 荏原冷热系统（中国）有限公司 | Centrifugal unit and control method thereof |
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