CN215216748U - Evaporative cooling screw low-temperature water chilling unit with siphon oil cooling function - Google Patents
Evaporative cooling screw low-temperature water chilling unit with siphon oil cooling function Download PDFInfo
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- CN215216748U CN215216748U CN202121545964.6U CN202121545964U CN215216748U CN 215216748 U CN215216748 U CN 215216748U CN 202121545964 U CN202121545964 U CN 202121545964U CN 215216748 U CN215216748 U CN 215216748U
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Abstract
The utility model discloses an evaporative cold screw low-temperature water chilling unit with siphon oil cooling, which relates to the technical field of refrigeration equipment and comprises a compressor, an oil separator, an evaporative condenser, an economizer, an oil cooler, a liquid reservoir arranged below the compressor, an evaporator arranged above the liquid reservoir and a siphon column, wherein the bottom end of the siphon column is higher than the oil cooler; the water chilling unit comprises a refrigeration main loop, a refrigeration branch, an oil cooling loop and an oil cooling refrigerator loop. The utility model discloses a vertical siphon post and plate-type oil cooler realize the oil cooling with the cold mode of siphon oil, compare in traditional water-cooling oil cooling, air-cooled oil cooling, freon oil cooling have higher cooling efficiency, can not produce great influence to the environment in work place simultaneously, compare in the horizontal siphon jar greatly reduced the installation degree of difficulty and the quantity of refrigerant, coolant oil, do benefit to the control of cost.
Description
Technical Field
The utility model relates to a refrigeration plant technical field, concretely relates to refrigerating unit for being used for refrigerating and maintaining low temperature environment to appointed space.
Background
With the development of science and technology and the improvement of the living standard of people, in recent years, the logistics cold chain is gradually widely applied, and users are continuously improving and tightening the requirements of the logistics cold chain. The large-scale meat factory refrigeration house is an important component of a logistics cold chain, the temperature of the large-scale meat factory refrigeration house is required to be kept lower than-23 ℃, the environmental protection and safety aspects are comprehensively considered, and the large-scale meat factory refrigeration house is generally realized and kept at a low temperature by using an evaporation cold screw low-temperature water chilling unit.
In the low-temperature water chilling unit with the evaporation cold screw, the temperature of the cooled secondary refrigerant is required to be lower than minus 30 ℃. When the evaporation temperature of the secondary refrigerant meets the requirement, the compression ratio of the compressor in the operation process is larger due to the low evaporation temperature of the secondary refrigerant, and the oil temperature of the refrigeration oil in the compressor and the refrigeration system is higher, so that an oil cooler is required to be additionally arranged for cooling the refrigeration oil.
At present, the existing evaporation cold screw low-temperature water chilling unit generally adopts a horizontal siphon tank as an oil cooler, and the volume of the horizontal siphon tank is very largeThe amount of cooling oil and refrigerant required is also large, and the economy is poor; meanwhile, in order to ensure that the refrigerant in the horizontal siphon tank has enough height difference or the refrigerant has enough static pressure difference to the oil cooler, the horizontal siphon tank needs to be installed outside the water chilling unit and at a higher position, and the general horizontal liquid storage tank needs to be higher than the oil cooler
The height of the bracket leads to inconvenient installation; in addition, the horizontal siphon tank is limited by the self principle of the horizontal siphon tank, the horizontal liquid level inside the horizontal siphon tank is unstable, the problem that the system refrigeration is invalid due to the fact that all refrigerants entering the liquid storage device are liquid refrigerants and possibly gaseous refrigerants enter the liquid storage device and even enter a refrigeration expansion valve at the rear part of the liquid storage device is solved.
SUMMERY OF THE UTILITY MODEL
The utility model discloses just in order to avoid the weak point that above-mentioned prior art exists, provide a cold screw rod low temperature cooling water set of evaporation with siphon oil cooling.
The utility model discloses a solve technical problem and adopt following technical scheme: an evaporative cold screw low-temperature water chilling unit with siphon oil cooling comprises a compressor, an oil separator, an evaporative condenser, an economizer, an oil cooler, a liquid reservoir arranged below the compressor, an evaporator arranged above the liquid reservoir and a siphon column, wherein the bottom end of the siphon column is higher than the oil cooler;
the water chilling unit comprises a refrigeration main loop, a refrigeration branch, an oil cooling loop and an oil cooling refrigerator loop;
a refrigeration main loop: a compressor exhaust valve of the compressor is communicated with an oil separator inlet of the oil separator, an oil separator outlet of the oil separator is communicated with an evaporative condenser inlet of the evaporative condenser, and a pipeline between the oil separator outlet and the evaporative condenser inlet is sequentially communicated with a constant pressure valve and an oil content outlet stop check valve; an evaporative condenser outlet of the evaporative condenser is communicated with a siphon column liquid inlet pipe of the siphon column, and a siphon column liquid inlet valve is communicated on a pipeline between the evaporative condenser outlet and the siphon column liquid inlet pipe; a main liquid outlet pipe of a siphon column of the siphon column is communicated with a liquid reservoir liquid inlet valve of the liquid reservoir, a liquid reservoir liquid outlet valve of the liquid reservoir is communicated with an economizer liquid inlet of the economizer, a pipeline between the liquid reservoir liquid outlet valve and the economizer liquid inlet is sequentially communicated with a drying filter barrel or a drying filter element, a liquid tube liquid viewing mirror and a liquid tube ball valve, a liquid reservoir exhaust valve is arranged at the top of the liquid reservoir, and two liquid reservoir safety valves are communicated and arranged through a liquid reservoir three-way valve; an economizer liquid outlet of the economizer is communicated with an evaporator inlet of the evaporator, and a main electromagnetic valve of a liquid pipe and a main expansion valve are sequentially communicated on a pipeline between the economizer liquid outlet and the evaporator inlet; an evaporator outlet of the evaporator is communicated with a compressor suction valve of the compressor, and a pipeline between the evaporator outlet and the compressor suction valve is sequentially communicated with a pressure maintaining joint and a gas return pipe exhaust valve;
a refrigeration branch circuit: the economizer expansion valve is characterized in that an economizer liquid pipe filter, an economizer liquid pipe sight glass, an economizer liquid pipe electromagnetic valve and an economizer expansion valve are sequentially communicated, an economizer liquid pipe filter inlet of the economizer liquid pipe filter is communicated to a pipeline between the liquid pipe ball valve and the economizer liquid inlet, an economizer expansion valve outlet of the economizer expansion valve is communicated with an economizer air inlet of the economizer, and an economizer air outlet of the economizer is communicated with a compressor economizer valve of the compressor;
an oil cooling circuit: an oil separation outlet valve at the bottom of the oil separator is communicated with an oil cooler inlet of the oil cooler, an oil cooler outlet of the oil cooler is communicated with a compressor oil return valve of the compressor, and an oil mixing valve, an oil way ball valve, an oil way electromagnetic valve, an oil way filter and an oil way oil sight glass are sequentially communicated and arranged on a pipeline between the cooler outlet and the compressor oil return valve; a compressor exhaust valve of the compressor is communicated with an oil separator inlet of the oil separator; the oil mixing valve is a three-way valve and is also communicated with a pipeline between the oil content oil outlet valve and a liquid inlet of the oil cooler, an oil drain valve is also communicated and arranged on a pipeline between the oil way electromagnetic valve and the oil way filter, and a pressure maintaining joint and a high-pressure sensor are also communicated and arranged on a pipeline between the compressor exhaust valve and the oil content oil outlet valve;
oil cooling refrigerator circuit: a siphon column liquid outlet pipe of the siphon column is communicated with an oil cooler air inlet of the oil cooler, and a siphon column refrigeration auxiliary path valve, a siphon column refrigeration auxiliary path filter barrel filter element, a siphon column refrigeration auxiliary path valve and a siphon column refrigeration auxiliary path liquid viewing mirror are sequentially communicated and arranged on a pipeline between the siphon column liquid outlet pipe and the oil cooler air inlet;
an air outlet of the oil cooler is communicated with a second air return pipe of a siphon column of the siphon column, and a first air return pipe of the siphon column is communicated with an evaporative condenser inlet of the evaporative condenser.
Preferably, still include the siphon post balance tube of siphon post with the reservoir balanced valve at reservoir top, the main drain pipe of siphon post with reservoir feed liquor valve intercommunication.
Preferably, the system further comprises a measurement and control branch consisting of a high pressure meter, a high-low pressure meter and a low pressure meter which are sequentially communicated, and two ends of the measurement and control branch are respectively communicated to a pipeline between the compressor exhaust valve and the oil outlet valve and a pipeline between the compressor suction valve and the muffler exhaust valve and the compressor suction valve through pressure maintaining joints.
Preferably, the compressor is a semi-closed asymmetric double-screw compressor special for low temperature.
Preferably, the evaporator is a shell and tube dry evaporator, and an internal thread red copper heat exchange tube is arranged in the evaporator in a penetrating mode.
Preferably, the liquid reservoir is a horizontal liquid reservoir.
Preferably, the oil cooler is a plate oil cooling heat exchanger and is made of stainless steel.
Preferably, the economizer is a plate heat exchanger and is made of stainless steel.
The utility model provides a cold screw rod low temperature cooling water set of evaporation with siphon oil cooling has following beneficial effect:
1. the utility model adopts the vertical siphon column and the plate oil cooler to realize oil cooling in a siphon oil cooling mode, has higher cooling efficiency compared with the traditional water cooling oil cooling, air cooling oil cooling and Freon oil cooling, can not generate larger influence on the environment of a work site, greatly reduces the installation difficulty and the consumption of refrigerant and cooling oil compared with a horizontal siphon tank, and is beneficial to the control of cost;
2. the utility model adopts the vertical small siphon column, has small volume, small occupied space, no need of special cooling water pipeline and good applicability;
3. the utility model discloses compact structure, easy and simple to handle, the pipe connection degree of difficulty is low, is suitable for indoor location, has good practicality.
Drawings
FIG. 1 is a schematic diagram of the present invention;
fig. 2 is a schematic diagram of the circuit and flow direction between the evaporative condenser, siphon column and reservoir of the present invention;
FIG. 3 is a schematic view of the structure of the present invention;
fig. 4 is a schematic top view of the present invention;
fig. 5 is a schematic diagram of the structure of the right side of the present invention.
In the figure:
1. 1.1 parts of a compressor, 1.2 parts of a compressor exhaust valve, 1.3 parts of a compressor oil return valve, 1.4 parts of a compressor economizer valve; 2. an oil separator, 2.1, an oil separating and discharging valve, 2.2, an oil separator inlet, 2.3 and an oil separator outlet; 3. a constant pressure valve; 4. an oil outlet cut-off check valve; 5. evaporative condenser, 5.1, evaporative condenser inlet, 5.2, evaporative condenser outlet; 6. a siphon column liquid inlet valve; 7. 7.1 parts of siphon column, 7.2 parts of siphon column liquid inlet pipe, 7.2 parts of siphon column first air return pipe, 7.3 parts of siphon column second air return pipe, 7.4 parts of siphon column balance pipe, 7.5 parts of siphon column main liquid outlet pipe, 7.6 parts of siphon column liquid outlet pipe; 8. the device comprises a liquid storage device, 8.1 liquid outlet valves of the liquid storage device, 8.2 balance valves of the liquid storage device, 8.3 liquid inlet valves of the liquid storage device, 8.4 exhaust valves of the liquid storage device, 8.5 three-way valves of the liquid storage device, 8.6 safety valves of the liquid storage device; 9. drying the filter vat; 10. drying the filter element; 11. a liquid tube sight glass; 12. a liquid pipe ball valve; 13. an economizer; 13.1, an economizer liquid inlet, 13.2, an economizer liquid outlet, 13.3, an economizer gas inlet, 13.4 and an economizer gas outlet; 14. a liquid tube main solenoid valve; 15. a main expansion valve; 16. evaporator, 16.1, evaporator inlet, 16.2, evaporator outlet; 17. the oil cooler, 17.1, oil cooler inlet, 17.2, oil cooler outlet, 17.3, oil cooler air inlet, 17.4, oil cooler air outlet; 18. an oil mixing valve; 19. an oil path ball valve; 20. an oil path solenoid valve; 21. an oil path filter; 22. an oil circuit oil sight glass; 23. an economizer liquid tube filter; 24. the liquid level is viewed from the liquid tube of the economizer; 25. an economizer liquid tube solenoid valve; 26. an economizer expansion valve; 27. a pressure maintaining joint; 28. a gas return pipe exhaust valve; 29. a high pressure gauge; 30. high and low voltage control; 31. a low pressure gauge; 32. a high pressure sensor; 33. an oil drain valve; 34. a siphon column refrigeration auxiliary path valve; 35. a siphon column refrigeration bypass filter barrel; 36. a siphon column refrigeration auxiliary filter barrel filter element; 37. a siphon column refrigeration auxiliary road liquid sight glass; 40. an electric cabinet.
Detailed Description
To make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the embodiments of the present invention are combined to clearly and completely describe the technical solution in the embodiments 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 efforts belong to the protection scope of the present invention.
As shown in fig. 1 to 5, the structural relationship is: the oil cooler comprises a compressor 1, an oil separator 2, an evaporative condenser 5, an economizer 13, an oil cooler 17, a liquid reservoir 8 arranged below the compressor 1 and an evaporator 16 arranged above the liquid reservoir 8, wherein the economizer 13 and the oil cooler 17 are in a two-in two-out structure, liquid inlets of the economizer and the oil cooler are both positioned above a liquid outlet, and an air inlet is both positioned below an air outlet; the oil cooler also comprises a siphon column 7, and the height of the bottom end of the siphon column 7 is higher than that of the oil cooler 17;
the water chilling unit comprises a refrigeration main loop, a refrigeration branch, an oil cooling loop and an oil cooling refrigerator loop;
a refrigeration main loop: a compressor exhaust valve 1.1 of the compressor 1 is communicated with an oil separator inlet 2.2 of the oil separator 2, an oil separator outlet 2.3 of the oil separator 2 is communicated with an evaporative condenser inlet 5.1 of the evaporative condenser 5, and a pipeline between the oil separator outlet 2.3 and the evaporative condenser inlet 5.1 is sequentially communicated with a constant pressure valve 3 and an oil content outlet stop check valve 4; an evaporative condenser outlet 5.2 of the evaporative condenser 5 is communicated with a siphon column liquid inlet pipe 7.1 of a siphon column 7, and a siphon column liquid inlet valve 6 is communicated on a pipeline between the evaporative condenser outlet 5.2 and the siphon column liquid inlet pipe 7.1; a main liquid outlet pipe 7.5 of a siphon column 7 is communicated with a liquid reservoir liquid inlet valve 8.3 of a liquid reservoir 8, a liquid reservoir liquid outlet valve 8.1 of the liquid reservoir 8 is communicated with an economizer liquid inlet 13.1 of an economizer 13, a pipeline between the liquid reservoir liquid outlet valve 8.1 and the economizer liquid inlet 13.1 is sequentially communicated with a drying filter barrel 9 or a drying filter core 10, a liquid tube liquid viewing mirror 11 and a liquid tube ball valve 12, a liquid reservoir exhaust valve 8.4 is arranged at the top of the liquid reservoir 8, and two liquid reservoir safety valves 8.6 are communicated and arranged through a liquid reservoir three-way valve 8.5; an economizer liquid outlet 13.2 of the economizer 13 is communicated with an evaporator inlet 16.1 of the evaporator 16, and a main liquid pipe electromagnetic valve 14 and a main expansion valve 15 are sequentially communicated on a pipeline between the economizer liquid outlet 13.2 and the evaporator inlet 16.1; an evaporator outlet 16.2 of the evaporator 16 is communicated with a compressor suction valve 1.2 of the compressor 1, and a pipeline between the evaporator outlet 16.2 and the compressor suction valve 1.2 is sequentially communicated with a pressure maintaining joint 27 and a gas return pipe exhaust valve 28;
a refrigeration branch circuit: an economizer liquid pipe filter 23, an economizer liquid pipe liquid sight glass 24, an economizer liquid pipe electromagnetic valve 25 and an economizer expansion valve 26 are sequentially communicated, an economizer liquid pipe filter inlet of the economizer liquid pipe filter 23 is communicated to a pipeline between the liquid pipe ball valve 12 and the economizer liquid inlet 13.1, an economizer expansion valve outlet of the economizer expansion valve 26 is communicated with an economizer air inlet 13.3 of the economizer 13, and an economizer air outlet 13.4 of the economizer 13 is communicated with a compressor economizer valve 1.4 of the compressor 1;
an oil cooling circuit: an oil separation outlet valve 2.1 at the bottom of the oil separator 2 is communicated with an oil cooler inlet 17.1 of the oil cooler 17, an oil cooler outlet 17.2 of the oil cooler 17 is communicated with a compressor oil return valve 1.3 of the compressor 1, and an oil mixing valve 18, an oil way ball valve 19, an oil way electromagnetic valve 20, an oil way filter 21 and an oil way oil sight glass 22 are sequentially communicated and arranged on a pipeline between the cooler outlet 17.2 and the compressor oil return valve 1.3; a compressor exhaust valve 1.1 of the compressor 1 is communicated with an oil separator inlet 2.2 of the oil separator 2; the oil mixing valve 18 is a three-way valve and is also communicated with a pipeline between the oil separating and discharging valve 2.1 and a liquid inlet 17.1 of the oil cooler, an oil drain valve 33 is also communicated with a pipeline between the oil way electromagnetic valve 20 and the oil way filter 21, and a pressure maintaining joint 27 and a high pressure sensor 32 are also communicated with a pipeline between the compressor exhaust valve 1.1 and the oil separating and discharging valve 2.1;
oil cooling refrigerator circuit: a siphon column liquid outlet pipe 7.6 of the siphon column 7 is communicated with an oil cooler air inlet 17.3 of the oil cooler 17, and a siphon column refrigeration auxiliary path valve 34, a siphon column refrigeration auxiliary path filter barrel 35, a siphon column refrigeration auxiliary path filter barrel filter core 36, a siphon column refrigeration auxiliary path valve 34 and a siphon column refrigeration auxiliary path liquid viewing mirror 37 are sequentially communicated and arranged on a pipeline between the siphon column liquid outlet pipe 7.6 and the oil cooler air inlet 17.3;
an oil cooler air outlet 17.4 of the oil cooler 17 is communicated with a siphon column second air return pipe 7.3 of the siphon column 7, and a siphon column first air return pipe 7.2 of the siphon column 7 is communicated with an evaporative condenser inlet 5.1 of the evaporative condenser 5.
Preferably, the device also comprises a siphon column balance pipe 7.4 of the siphon column 7 and a reservoir balance valve 8.2 at the top of the reservoir 8, and a main liquid outlet pipe 7.5 of the siphon column is communicated with the reservoir liquid inlet valve 8.2.
Preferably, the system further comprises a measurement and control branch consisting of a high pressure meter 29, a high-low pressure controller 30 and a low pressure meter 31 which are sequentially communicated, and two ends of the measurement and control branch are respectively communicated to a pipeline between the compressor exhaust valve 1.1 and the oil outlet valve 2.1 and a pipeline between the compressor suction valve 1.2 and the muffler exhaust valve 28 and the compressor suction valve 1.2 through pressure maintaining joints 27.
Preferably, the compressor 1 is a semi-closed asymmetric twin-screw compressor dedicated for low temperature.
Preferably, the evaporator 16 is a shell-and-tube dry evaporator, and an internal thread red copper heat exchange tube is arranged in the evaporator.
Preferably, the reservoir 8 is a horizontal reservoir.
Preferably, the oil cooler 17 is a plate oil cooling heat exchanger, made of stainless steel.
Preferably, the economizer 13 is a plate heat exchanger, made of stainless steel.
When in specific use, the working principle is as follows:
main refrigeration circuit:
the mixture of the high-temperature high-pressure refrigerant gas and the refrigeration oil flows out from the compressor exhaust valve 1.1, then enters the oil separator 2 from the oil separator inlet 2.2, and is separated into the high-temperature high-pressure refrigerant gas and the liquid refrigeration oil in the oil separator 2.
High-temperature and high-pressure refrigerant gas flows out from an outlet 2.3 of the oil separator, sequentially flows through a constant pressure valve 3 and an oil content outlet stop check valve 4, enters an evaporative condenser 5 from an evaporative condenser inlet 5.1, and is condensed into refrigerant liquid in the evaporative condenser 5.
Refrigerant liquid flows out from an outlet 5.2 of the evaporative condenser, flows through a siphon column liquid inlet valve 6, enters a siphon column 7 from a siphon column liquid inlet pipe 7.1, then flows out from a main liquid outlet pipe 7.5 of the siphon column, enters a liquid storage device 8 from a liquid storage device liquid inlet valve 8.3, flows out from a liquid storage device liquid outlet valve 8.1, sequentially flows through a drying filter barrel 9, a drying filter core 10, a liquid pipe liquid viewing mirror 11 and a liquid pipe ball valve 12, and enters an economizer 13 from an economizer liquid inlet 13.1; in the economizer 13, an internal channel is communicated between the economizer liquid inlet 13.1 and the economizer liquid outlet 13.2, the channel is a heat release channel, refrigerant liquid flows in the channel to form a high-temperature heat release end in the economizer 13, and heat release is carried out to form super-cooling refrigerant liquid.
The subcooled refrigerant liquid flows out from the economizer liquid outlet 13.2, sequentially flows through the liquid pipe main electromagnetic valve 14 and the main expansion valve 15, enters the evaporator 16 from the evaporator inlet 16.1, and is subjected to heat absorption and evaporation in the evaporator 16 to form low-temperature and low-pressure refrigerant gas.
The low-temperature and low-pressure refrigerant gas flows out of the evaporator 16 through the evaporator outlet 16.2, then enters the compressor 1 through the compressor suction valve 1.2, and is compressed into high-temperature and high-pressure refrigerant gas in the compressor 1.
A refrigeration branch circuit:
after flowing through the liquid pipe ball valve 12, part of the refrigerant liquid in the main refrigeration loop enters the branched refrigeration branch, and after sequentially flowing through the economizer liquid pipe filter 23, the economizer liquid pipe liquid sight glass 24, the economizer liquid pipe electromagnetic valve 25 and the economizer expansion valve 26 in the refrigeration branch, the refrigerant liquid enters the economizer 13 from the economizer air inlet 13.3;
an inner channel is communicated between the economizer air inlet 13.3 and the economizer air outlet 13.4 in the economizer 13 and is a heat absorption channel, refrigerant liquid flows in the channel to form a low-temperature heat absorption end in the economizer 13, and the refrigerant gas is formed by heat absorption expansion and gasification.
Refrigerant gas flows out of the economizer outlet 13.4 and then enters the compressor 1 through the compressor economizer valve 1.4 to be compressed and then returns to the main refrigeration loop.
An oil cooling circuit:
the mixture of the high-temperature high-pressure refrigerant gas and the refrigeration oil flows out from the compressor exhaust valve 1.1, then enters the oil separator 2 from the oil separator inlet 2.2, and is separated into the high-temperature high-pressure refrigerant gas and the liquid refrigeration oil in the oil separator 2.
The liquid refrigeration oil is discharged by an oil outlet valve 2.1 and enters an oil cooler 17 through a liquid inlet 17.1 of the oil cooler; in the oil cooler 17, an internal channel is communicated between the oil cooler liquid inlet 17.1 and the oil cooler liquid outlet 17.2, the channel is an oil heat release channel, and liquid refrigeration oil flows in the channel to release heat to become low-temperature liquid refrigeration oil;
the low-temperature liquid refrigeration oil flows out from the liquid outlet 17.2 of the oil cooler, sequentially flows through the oil mixing valve 18, the oil way ball valve 19, the oil way electromagnetic valve 20, the oil way filter 21 and the oil way liquid viewing mirror 22, and then reenters the compressor 1 through the oil return valve 1.3 of the compressor.
Oil cooling refrigerator circuit:
part of the refrigerant liquid flowing into the siphon column 7 is shunted and flows out by a siphon column liquid outlet pipe 7.6, sequentially flows through a siphon column refrigeration auxiliary circuit valve 34, a siphon column refrigeration auxiliary circuit filter barrel 35, a siphon column refrigeration auxiliary circuit filter barrel filter element 36, a siphon column refrigeration auxiliary circuit valve 34 and a siphon column refrigeration auxiliary circuit liquid sight glass 37, and then enters the oil cooler 17 through an oil cooler air inlet 17.3;
an internal channel is communicated between the cooler air inlet 17.3 and the cooler air outlet 17.4 in the oil cooler 17, and the channel is an oil heat absorption channel, and refrigerant liquid flows in the channel to absorb heat and gasify to form refrigerant gas.
Refrigerant gas flows out from an air outlet 17.4 of the oil cooler, enters the siphon column 7 from a second air return pipe 7.3 of the siphon column, then flows out from a first air return pipe 7.2 of the siphon column, is introduced into the evaporator 5 from an inlet 5.1 of the evaporative condenser, is condensed into refrigerant liquid in the evaporator 5, and enters the main refrigeration loop.
Refrigerant gas formed by the absorption and thermal expansion of refrigerant liquid in the oil cooler 17 and low-temperature liquid refrigerant oil formed by the heat release of the liquid refrigerant oil both generate differential pressure circulating power in the oil cooler 17 according to the density change, thereby ensuring the flow of carriers in a loop and improving the cooling efficiency.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
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, it should be understood by those skilled in the art 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 (8)
1. The utility model provides an evaporation cold screw low temperature cooling water set with siphon oil cooling, includes compressor (1), oil separator (2), evaporative condenser (5), economic ware (13), oil cooler (17), install in reservoir (8) below compressor (1) and install in evaporimeter (16) above reservoir (8), its characterized in that: the oil cooler also comprises a siphon column (7), and the height of the bottom end of the siphon column (7) is higher than that of the oil cooler (17);
the water chilling unit comprises a refrigeration main loop, a refrigeration branch, an oil cooling loop and an oil cooling refrigerator loop;
a refrigeration main loop: a compressor exhaust valve (1.1) of the compressor (1) is communicated with an oil separator inlet (2.2) of the oil separator (2), an oil separator outlet (2.3) of the oil separator (2) is communicated with an evaporative condenser inlet (5.1) of the evaporative condenser (5), and a pipeline between the oil separator outlet (2.3) and the evaporative condenser inlet (5.1) is sequentially communicated with a constant pressure valve (3) and an oil outlet stop check valve (4); an evaporative condenser outlet (5.2) of the evaporative condenser (5) is communicated with a siphon column liquid inlet pipe (7.1) of the siphon column (7), and a siphon column liquid inlet valve (6) is communicated on a pipeline between the evaporative condenser outlet (5.2) and the siphon column liquid inlet pipe (7.1); a main siphon column liquid outlet pipe (7.5) of the siphon column (7) is communicated with a liquid reservoir liquid inlet valve (8.3) of the liquid reservoir (8), a liquid reservoir liquid outlet valve (8.1) of the liquid reservoir (8) is communicated with an economizer liquid inlet (13.1) of the economizer (13), a drying filter barrel (9) or a drying filter element (10), a liquid tube liquid viewing mirror (11) and a liquid tube ball valve (12) are sequentially communicated and arranged on a pipeline between the liquid reservoir liquid outlet valve (8.1) and the economizer liquid inlet (13.1), a liquid reservoir exhaust valve (8.4) is arranged at the top of the liquid reservoir (8), and two liquid reservoir safety valves (8.6) are communicated and arranged through a liquid reservoir three-way valve (8.5); an economizer liquid outlet (13.2) of the economizer (13) is communicated with an evaporator inlet (16.1) of the evaporator (16), and a main electromagnetic valve (14) and a main expansion valve (15) of a liquid pipe are sequentially communicated and arranged on a pipeline between the economizer liquid outlet (13.2) and the evaporator inlet (16.1); an evaporator outlet (16.2) of the evaporator (16) is communicated with a compressor suction valve (1.2) of the compressor (1), and a pressure maintaining joint (27) and an air return pipe exhaust valve (28) are sequentially communicated and arranged on a pipeline between the evaporator outlet (16.2) and the compressor suction valve (1.2);
a refrigeration branch circuit: an economizer liquid pipe filter (23), an economizer liquid pipe liquid sight glass (24), an economizer liquid pipe electromagnetic valve (25) and an economizer expansion valve (26) are sequentially communicated, an economizer liquid pipe filter inlet of the economizer liquid pipe filter (23) is communicated to a pipeline between the liquid pipe ball valve (12) and the economizer liquid inlet (13.1), an economizer expansion valve outlet of the economizer expansion valve (26) is communicated with an economizer air inlet (13.3) of the economizer (13), and an economizer air outlet (13.4) of the economizer (13) is communicated with a compressor economizer valve (1.4) of the compressor (1);
an oil cooling circuit: an oil separation and outlet valve (2.1) at the bottom of the oil separator (2) is communicated with an oil cooler liquid inlet (17.1) of the oil cooler (17), an oil cooler liquid outlet (17.2) of the oil cooler (17) is communicated with a compressor oil return valve (1.3) of the compressor (1), and an oil mixing valve (18), an oil way ball valve (19), an oil way electromagnetic valve (20), an oil way filter (21) and an oil way oil viewing mirror (22) are sequentially communicated and arranged on a pipeline between the cooler liquid outlet (17.2) and the compressor oil return valve (1.3); a compressor exhaust valve (1.1) of the compressor (1) is communicated with an oil separator inlet (2.2) of the oil separator (2); the oil mixing valve (18) is a three-way valve and is also communicated with a pipeline between the oil content oil outlet valve (2.1) and the oil cooler liquid inlet (17.1), an oil drain valve (33) is also communicated and arranged on the pipeline between the oil way electromagnetic valve (20) and the oil way filter (21), and a pressure maintaining joint (27) and a high pressure sensor (32) are also communicated and arranged on the pipeline between the compressor exhaust valve (1.1) and the oil content oil outlet valve (2.1);
oil cooling refrigerator circuit: a siphon column liquid outlet pipe (7.6) of the siphon column (7) is communicated with an oil cooler air inlet (17.3) of the oil cooler (17), and a siphon column refrigeration auxiliary path valve (34), a siphon column refrigeration auxiliary path filter barrel (35), a siphon column refrigeration auxiliary path filter barrel filter core (36), a siphon column refrigeration auxiliary path valve (34) and a siphon column refrigeration auxiliary path liquid viewing mirror (37) are sequentially communicated and arranged on a pipeline between the siphon column liquid outlet pipe (7.6) and the oil cooler air inlet (17.3);
an oil cooler air outlet (17.4) of the oil cooler (17) is communicated with a siphon column second air return pipe (7.3) of the siphon column (7), and a siphon column first air return pipe (7.2) of the siphon column (7) is communicated with an evaporative condenser inlet (5.1) of the evaporative condenser (5).
2. The evaporative cold screw cryogenic water chiller with siphon oil cooling as claimed in claim 1, wherein: still include siphon post balance pipe (7.4) of siphon post (7) with reservoir balance valve (8.2) at reservoir (8) top, siphon post owner drain pipe (7.5) with reservoir feed liquor valve (8.3) intercommunication.
3. The evaporative cold screw cryogenic water chiller with siphon oil cooling as claimed in claim 1, wherein: the device is characterized by further comprising a measurement and control branch consisting of a high-pressure meter (29), a high-low pressure controller (30) and a low-pressure meter (31) which are sequentially communicated, wherein two ends of the measurement and control branch are respectively communicated to a pipeline between the compressor exhaust valve (1.1) and the oil outlet valve (2.1) and a pipeline between the compressor suction valve (1.2) and the air return pipe exhaust valve (28) and the compressor suction valve (1.2) through pressure maintaining connectors (27).
4. The evaporative cold screw cryogenic water chiller with siphon oil cooling as claimed in claim 1, wherein: the compressor (1) is a semi-closed asymmetric double-screw compressor special for low temperature.
5. The evaporative cold screw cryogenic water chiller with siphon oil cooling as claimed in claim 1, wherein: the evaporator (16) is a shell and tube dry evaporator, and an internal thread red copper heat exchange tube is arranged in the evaporator in a penetrating mode.
6. The evaporative cold screw cryogenic water chiller with siphon oil cooling as claimed in claim 1, wherein: the liquid storage device (8) is a horizontal liquid storage device.
7. The evaporative cold screw cryogenic water chiller with siphon oil cooling as claimed in claim 1, wherein: the oil cooler (17) is a plate oil cooling heat exchanger and is made of stainless steel.
8. The evaporative cold screw cryogenic water chiller with siphon oil cooling as claimed in claim 1, wherein: the economizer (13) is a plate heat exchanger and is made of stainless steel.
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| CN202121545964.6U CN215216748U (en) | 2021-07-08 | 2021-07-08 | Evaporative cooling screw low-temperature water chilling unit with siphon oil cooling function |
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| CN202121545964.6U CN215216748U (en) | 2021-07-08 | 2021-07-08 | Evaporative cooling screw low-temperature water chilling unit with siphon oil cooling function |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115900137A (en) * | 2022-11-21 | 2023-04-04 | 珠海格力电器股份有限公司 | Oil cooling system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115900137A (en) * | 2022-11-21 | 2023-04-04 | 珠海格力电器股份有限公司 | Oil cooling system |
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