CN210292406U - Evaporative condensation type water chilling unit with liquid cooling device - Google Patents

Evaporative condensation type water chilling unit with liquid cooling device Download PDF

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Publication number
CN210292406U
CN210292406U CN201920919754.5U CN201920919754U CN210292406U CN 210292406 U CN210292406 U CN 210292406U CN 201920919754 U CN201920919754 U CN 201920919754U CN 210292406 U CN210292406 U CN 210292406U
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cooling
pipeline
liquid
outlet
regulating valve
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CN201920919754.5U
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Chinese (zh)
Inventor
章立标
蒋松林
陈绍辉
杨泽
张燊
郑木
汪仁僥
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Zhejiang King Co ltd
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Zhejiang King Co ltd
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Abstract

The utility model discloses an evaporation condensing water chilling unit with a liquid cooling device, which comprises a compressor, an evaporative condenser connected with the outlet of the compressor, a cooling device connected with the outlet of the evaporative condenser, a throttling device connected with the outlet of the cooling device, an evaporator, a first regulating valve and a second regulating valve; the throttling device is connected with the evaporator through a pipeline, a cooling auxiliary road is arranged on the pipeline, and part of the cooling auxiliary road penetrates into the cooling device; the first regulating valve is arranged on the pipeline, and the second regulating valve is arranged on the cooling auxiliary road. The utility model discloses a cooling device's setting effectively realizes improving the super-cooled rate of high-pressure liquid to the cooling of high-pressure liquid, avoids the emergence of the flash distillation condition, effectively improves unit performance and operating stability.

Description

Evaporative condensation type water chilling unit with liquid cooling device
Technical Field
The utility model belongs to the technical field of refrigeration machinery, especially, relate to a take evaporation condensing cooling water set of liquid cooling device.
Background
The evaporative condensation type water chilling unit with the liquid cooling device combines the advantages of water-cooling and air-cooling water chilling units, air and circulating water are used as cooling media, the high-temperature and high-pressure gas refrigerant discharged by a compressor is directly condensed by using the evaporation latent heat of the circulating cooling water of the evaporative condenser, and the intermediate heat exchange link in the cooling water of the water chilling unit is eliminated, so that the condensation temperature can be reduced by 4-5 ℃ compared with that of the water chilling unit, and the power consumption of a cooling water pump can be saved.
Compared with a conventional water cooling system (a water cooling unit, a cooling water pump and a cooling tower), the unit refrigeration energy efficiency can be improved by about 20%; compared with an air cooling unit, the unit refrigeration energy efficiency can be improved by about 60 percent, so that the unit is the host type with the highest energy efficiency ratio in the existing refrigeration and air-conditioning system, and the defects of high condensation temperature and low refrigeration energy efficiency of the conventional air cooling and water cooling unit can be well overcome.
Just because the condensation temperature of the conventional evaporative condensing water chilling unit with the liquid cooling device is low, and the heat exchange pipe diameter of the evaporative condenser is relatively thick so as to facilitate liquid drainage, the supercooling degree of the high-pressure liquid at the outlet of the evaporative condenser is approximately zero. And when the high-pressure saturated liquid from the liquid reservoir passes through the drying filter, the stop valve, the electromagnetic valve and the high-pressure liquid pipe, local resistance and on-way resistance are inevitably generated, so that the saturated liquid generates a flash evaporation phenomenon, and part of the saturated liquid is changed into saturated gas.
Meanwhile, under the influence of air flow organization, refrigerant distribution uniformity and circulating cooling water distribution uniformity, the high-pressure gas refrigerant in the partial loop of the evaporative condenser is not completely condensed into saturated liquid, and the gas inevitably enters a high-pressure liquid path.
Because the volume of the saturated gas is about 40 times of that of the saturated liquid, once a gas refrigerant carried in the high-pressure liquid enters the throttling device, the flow of the refrigerant is seriously influenced, so that the evaporation temperature of a unit is reduced, and the refrigerating capacity and the refrigerating energy efficiency are seriously attenuated; meanwhile, the flash evaporation gas can also cause unstable flow of the liquid refrigerant supplied to the evaporator from the throttling device, even generate the problem of intermittent liquid supply, generate greater risks for the performance of the unit and the running reliability of the compressor, and therefore the stability of the unit is poor.
SUMMERY OF THE UTILITY MODEL
The utility model discloses an overcome prior art not enough, provide an evaporation condensation formula cooling water set of taking liquid cooling device who avoids the flash distillation condition to appear.
In order to achieve the above purpose, the utility model adopts the following technical scheme: an evaporation condensing type water chilling unit with a liquid cooling device comprises a compressor, an evaporative condenser connected with an outlet of the compressor, a cooling device connected with an outlet of the evaporative condenser, a throttling device connected with an outlet of the cooling device, an evaporator, a first regulating valve and a second regulating valve; the throttling device is connected with the evaporator through a pipeline, a cooling auxiliary road is arranged on the pipeline, and part of the cooling auxiliary road penetrates into the cooling device; the first regulating valve is arranged on the pipeline, and the second regulating valve is arranged on the cooling auxiliary road. The utility model discloses a cooling device's setting effectively realizes cooling to high-pressure liquid, improves the super-cooled rate of high-pressure liquid, avoids the high-pressure liquid of reservoir export because of the local resistance of parts such as drier-filter, solenoid valve under the not enough condition of super-cooled rate, has avoided the flash distillation that the on-the-way resistance of refrigeration pipeline between reservoir to the throttling arrangement causes and leads to the condition of seriously influencing unit refrigerating output and refrigeration efficiency, effectively improves unit performance and operating stability; through the setting of first governing valve and second governing valve, effectively adjust the refrigerant flow of major loop and cooling auxiliary road respectively, further strengthen the cooling effect, stop the emergence of the flash distillation condition.
A liquid storage device and a drying filter are sequentially arranged between the evaporative condenser outlet cooling devices; the mechanical impurities in the filter unit are effectively removed, and simultaneously, the moisture in the refrigerant is removed.
Pressure difference exists between the joint of the cooling auxiliary road and the pipeline and the joint of the pipeline and the evaporator, and a part of the medium conveyed in the pipeline can enter the cooling auxiliary road; ensuring the normal working process.
The high-pressure high-temperature gas refrigerant discharged by the compressor enters an evaporative condenser, heat is discharged to air and circulating cooling water and then condensed into high-pressure liquid, then the high-pressure liquid enters a cooling device through a liquid storage device and a drying filter, the high-pressure liquid is cooled by low-temperature low-pressure gas-liquid refrigerant in a cooling auxiliary road and then becomes high-pressure supercooled liquid, the high-pressure supercooled liquid enters a throttling device and is throttled and reduced in pressure to form low-temperature low-pressure gas-liquid refrigerant, then most of the low-temperature low-pressure gas-liquid refrigerant flows through a regulating valve and then enters an evaporator, and.
The cooling auxiliary road is provided with an auxiliary road throttling device, so that the effect of throttling and depressurizing high-pressure liquid passing through the cooling auxiliary road into low-temperature low-pressure gas-liquid refrigerant is better, and the coolant medium passing through the cooling auxiliary road can be gasified into low-pressure gas.
The evaporator comprises a barrel, end covers arranged at two ends of the barrel, a water inlet and a water outlet arranged on the end covers, a tube plate arranged in the barrel, a deflection piece, heat exchange tubes penetrating the tube plate and the deflection piece, a gas inlet and a gas outlet arranged on the barrel, and a buffer device for guiding gas entering the barrel from the gas inlet; through the arrangement of the buffer device, the impact force of gas rushing into the barrel from the air inlet cannot directly act on the heat exchange tube, the impact force of the gas on the heat exchange tube is reduced, the damage rate of the heat exchange tube is reduced, and the service life of equipment is prolonged.
The utility model discloses a cooling device's setting effectively realizes the cooling to high-pressure liquid, improves high-pressure liquid's super-cooled rate, and the high-pressure liquid of avoiding reservoir export leads to the condition of seriously influencing unit refrigeration capacity and refrigeration efficiency because of the local resistance of parts such as drier-filter, solenoid valve under the not enough condition of super-cooled rate, has avoided the flash distillation that the on-the-way resistance of reservoir to refrigeration pipeline arouses between the throttling arrangement, effectively improves unit performance and operating stability.
Drawings
Fig. 1 is a schematic structural diagram of a first embodiment of the present invention.
Fig. 2 is a schematic structural diagram of a second embodiment of the present invention.
Fig. 3 is a schematic structural diagram of the evaporator of the present invention.
Fig. 4 is an exploded view of the evaporator according to the present invention.
Fig. 5 is a schematic structural view of the evaporator of the present invention after the end cap is removed.
Fig. 6 is a side view of fig. 5.
Fig. 7 is a partially enlarged view of fig. 6.
Fig. 8 is a schematic structural view of the first buffer member of the present invention.
Fig. 9 is a schematic structural view of a second buffer member according to the present invention.
Fig. 10 is a schematic structural view of the baffle of the present invention.
Detailed Description
As shown in fig. 1-10, an evaporative condensing water chilling unit with a liquid cooling device comprises a compressor 1, an evaporative condenser 2, a cooling device 3, a throttling device 5, an evaporator 8, a first regulating valve and a second regulating valve, wherein the evaporative condenser 2 is connected with an outlet of the compressor, the cooling device 3 is connected with an outlet of the evaporative condenser, the throttling device 5 is connected with an outlet of the cooling device, and the throttling device 5 and the evaporator 8 are connected through a pipeline, so that the above components form a main loop; the first regulating valve is arranged on a pipeline, a cooling auxiliary road 12 is connected to the pipeline, the cooling auxiliary road 12 is connected with an evaporator, the cooling auxiliary road partially penetrates into the cooling device 3, and the second regulating valve is arranged on the cooling auxiliary road 12; the above-mentioned compressor 1, evaporative condenser 2, cooling device 3, throttling device 5, evaporator 8, first regulating valve and second regulating valve are respectively a compressor, an evaporative condenser, a water cooler, a throttle valve, an evaporator and a regulating valve purchased from the market, and the structure and principle are not described again.
Furthermore, an electromagnetic valve 4 is arranged between the main path outlet of the cooling device 3 and the throttling device 5, so that the phenomenon that when the compressor is stopped, a large amount of high-pressure liquid refrigerant in the evaporative condenser, the cooling device and the high-pressure liquid pipe enters the evaporator through the throttling device, and the compressor is seriously compressed when restarted is avoided; a liquid storage device 20 and a drying filter 30 are sequentially arranged between the cooling devices 3 at the outlet of the evaporative condenser 2, the liquid storage device is used for collecting high-pressure liquid condensed by the evaporative condenser, and the drying filter is used for filtering mechanical impurities of the unit and removing water in a refrigerant; in other embodiments, the cooling auxiliary road 12 is provided with an auxiliary road throttling device 11; the electromagnetic valve, the liquid storage device and the dry filter are all obtained by direct purchase on the market and are not described again; the auxiliary road throttling device is a throttling valve purchased from the market, and the structure and the principle are not described in detail.
Through the setting of first governing valve for there is local resistance in the pipeline on the position of first governing valve, and still has the pipeline pressure drop between throttling arrangement and the evaporimeter, thereby there is pressure differential between cooling accessory 12 and the pipe connection department and pipeline and the 8 junctions of evaporimeter, at the course of the work, makes the low temperature low pressure liquid refrigerant of pipeline internal transport enter into part extremely in the cooling accessory 12, carry out the heat transfer with the higher high-pressure liquid of temperature in the cooling device main road, absorb high-pressure liquid heat and cool down into high-pressure supercooled liquid with high-pressure liquid and evaporate into low-pressure gas after, then reentrant evaporimeter casing, in order to realize the cooling to high-pressure liquid.
The first regulating valve is used for regulating the pressure difference between the refrigerant pressure at the outlet of the throttling device and the refrigerant pressure of the shell of the evaporator, and when the first regulating valve is closed, the pressure difference is increased, so that the refrigerant pressure difference between the joint of the cooling auxiliary path 12 and the pipeline and the shell of the evaporator is correspondingly increased, and the refrigerant flow passing through the cooling auxiliary path is improved; on the contrary, the refrigerant pressure difference between the joint of the cooling auxiliary path 12 and the pipeline and the shell of the evaporator is correspondingly reduced, so that the flow of the refrigerant flowing through the cooling device auxiliary path is reduced; the second regulating valve is used for regulating the flow of the low-temperature and low-pressure refrigerant entering the auxiliary circuit of the cooling device, the flow of the refrigerant is increased when the second regulating valve is opened greatly, and the flow of the refrigerant is reduced when the second regulating valve is closed.
The specific working principle is as follows: the high-pressure high-temperature gas refrigerant discharged by a compressor enters an evaporative condenser when the unit operates, the high-pressure high-temperature gas refrigerant discharges heat to air and circulating cooling water and is condensed into high-pressure liquid, then the high-pressure liquid enters a main path of a cooling device through a liquid storage device and a drying filter, the high-pressure liquid enters a throttling device and is throttled and decompressed into low-temperature low-pressure gas-liquid refrigerant, then most of the low-temperature low-pressure gas-liquid refrigerant flows through a regulating valve and enters a distributor in the evaporator, the low-temperature low-pressure gas-liquid refrigerant is uniformly distributed to an axial shell space of the evaporator, exchanges heat with chilled water with relatively high temperature in a heat exchange tube, the chilled water is cooled, absorbs the heat of the chilled water and is vaporized into low-pressure gas, and then the chilled water returns to the compressor, the above steps are repeated.
Specifically, the evaporator 8 includes a metal cylinder 81, two end covers 82 respectively welded and fixedly connected with two ends of the cylinder, a water inlet and a water outlet respectively arranged on the two end covers, a tube plate 84 arranged in the cylinder, a baffle 85, a heat exchange tube 86 penetrating the tube plate and the baffle, a gas inlet 87 and a gas outlet 88 arranged on the cylinder, and a buffer device for guiding gas entering the cylinder 81 from the gas inlet 87; preferably, the air inlet 87 and the air outlet 88 are both obliquely arranged; the buffer device comprises a first buffer component arranged corresponding to the position of the air inlet 87 and a second buffer component arranged on the side part of the first buffer component; the first buffer component comprises a buffer plate 91 which can generate elastic deformation under the impact of gas, a positioning part 92 connected with the buffer plate and a positioning groove 93 which is arranged on the inner wall of the cylinder and into which the positioning part is inserted; the buffer plate 91 is made of stainless steel, the thickness of the buffer plate is 1-3cm, the buffer plate is arranged at the position below the outlet of the air inlet, one end of the buffer plate 91 is connected with the positioning part, and the other end of the buffer plate is bent downwards to form an arc-shaped drainage part 911; the positioning part is made of metal and comprises an inserting plate and a connecting arm 922 for connecting the inserting plate 921 and the buffer plate, wherein the inserting plate 921 is in an arc-shaped structure, the upper end of the connecting arm is fixedly connected with the inserting plate, and the lower end of the connecting arm is fixedly connected with the end part of the buffer plate; one end of the positioning groove is sealed, the other end of the positioning groove is communicated with the end face of the barrel, and after the baffle is installed, the positioning part can be inserted into the positioning groove in an aligning way, so that the buffer plate is installed; the baffle 85 comprises a central shaft 851 and a baffle 852 arranged on the central shaft, wherein the baffle 852 is arranged in a spiral structure, and the shape of the end of the buffer plate, which is contacted with the baffle, is preferably matched with the surface of the baffle, so that no gap exists between the buffer plate and the surface of the baffle.
Further, the buffer device further comprises a plurality of metal support members 94 connected with the buffer plate, one side of each metal support member 94 is fixedly connected with the buffer plate, one side is in a structure of an arc 941, and a rubber layer 942 is arranged on the arc 941; the center of the arc 941 is connected to the inner wall of the cylinder, and a gap is formed between the two ends of the arc 941 and the inner wall of the cylinder; the upper surface of the buffer board 91 is fixedly connected with an arched metal cover plate 912 through welding, the inner wall of the cover plate is fixedly connected with an anti-collision layer 913 in an adhering manner, and the anti-collision layer 913 is made of rubber; the support piece stably supports the buffer plate, so that the buffer plate is prevented from being excessively deformed when being impacted by gas, and can be quickly reset after being deformed, and the service life of the buffer plate is prolonged; and because a part of clearance exists between the cambered surface of the supporting piece and the inner wall of the cylinder body, the supporting piece can slightly swing in the cylinder body when the buffer plate is impacted, so that better buffer is generated for gas, and the turbulent state of the gas is more sufficient; moreover, the rubber layer is arranged on the cambered surface, so that the support piece can not generate sound due to impact with the inner wall of the cylinder body in the swinging process, and the noise of equipment can be avoided; the heat exchange tubes corresponding to the upper part of the buffer plate can be set to be of a U-shaped structure, so that the heat exchange tubes only have the condition that a small part of the end part of each heat exchange tube is positioned above the buffer plate, and the cover plate can shield the part of the heat exchange tube to avoid direct impact of gas on the part; under this kind of structure for the quantity of heat exchange tube need not to reduce, guarantees heat exchange efficiency, and the heat exchange tube that is located the buffer board top also can not suffer the impact, prolongs the life of heat exchange tube.
When the gas at the air inlet enters the cylinder, the gas is firstly impacted on the buffer plate, and then part of the gas is impacted on the second buffer part under the rebound of the buffer plate, so that the gas is dispersed to be in a more disordered state through twice impact, and then the gas is contacted with the heat exchange tube, the heat exchange tube is ensured to be only subjected to extremely small impact force, and the heat exchange tube is protected; secondly, the running speed of the gas is slowed down due to partial disorder of the gas flow direction, and the gas flows more slowly in the cylinder body in an initial stage compared with the traditional mode, so that the contact time between the gas and the end part of the heat exchange tube is prolonged, and the heat exchange effect is enhanced; moreover, because the gas is disturbed, the dispersion area of the gas in the cylinder at the initial stage is increased, and the heat exchange efficiency between the initial stage and the heat exchange tube is further enhanced; the buffer plate has certain deformation capacity, so that when gas impacts the buffer plate, the buffer plate is deformed to a certain degree, the surface of the buffer plate becomes an uneven surface, and the turbulent flow dispersion effect on the gas is better; the drainage portion is to playing the effect of guide for partial gas flows forward fast under the direction of drainage portion, thereby has avoided gas by the condition of excessive turbulent flow, has guaranteed that gas still has the motion trend of mainstream, makes gas maintain normal velocity of flow in the barrel, guarantees heat exchange efficiency.
The second buffer component comprises a flow distribution plate 101, a limiting piece 102 connected with the flow distribution plate and a limiting groove 103 arranged on the inner wall of the cylinder body and used for inserting the limiting piece, the flow distribution plate 101 is made of stainless steel, and the longitudinal section of the flow distribution plate is arranged in a wavy structure; the limiting piece is made of metal, the limiting groove is formed in the barrel, the shape of the limiting groove is matched with that of the limiting piece, and after the baffle piece is installed, the limiting portion can be inserted into the limiting groove in an aligning mode, so that the flow distribution plate can be installed.
The inner wall of the cylinder 81 is provided with two guide rails 811 and a plurality of supporting foot groups connected with the guide rails, the plurality of supporting foot groups are uniformly distributed along the length direction of the guide rails, each supporting foot group comprises two inclined supporting feet 812 respectively arranged at the left side and the right side of the guide rails, one end of each inclined supporting foot is fixedly connected with the inner wall of the cylinder, and the other end of each inclined supporting foot is fixedly connected with the guide rails; a strip-shaped groove 853 and a triangular groove 854 are arranged on the baffle plate 852 at positions corresponding to the guide rails, and the triangular groove is communicated with the strip-shaped groove; when the device is installed, the strip-shaped groove 853 is used for the guide rail 811 to pass through, and the triangular groove 854 is used for the diagonal brace to pass through; preferably, the left and right side walls of the triangular groove are respectively bonded and fixedly connected with a triangular rubber block 855;
the installation of the baffle is positioned through the slide rail, so that the U-shaped heat exchange tube is positioned between the buffer plate and the baffle plate after the baffle is installed; the supporting legs support the guide rail, so that the guide rail is firmly connected with the barrel; the rubber block has deformability to guarantee that it can not cause the influence to the assembly of baffling piece, and baffling piece installation completion back, the rubber block can seal the triangular groove, avoids gaseous direct passing through from the triangular groove, guarantees that all gas in the barrel all flow under the guide of baffling board, contacts with the heat exchange tube.

Claims (5)

1. The utility model provides a take liquid cooling device's evaporation condensing cooling water set which characterized in that: the device comprises a compressor (1), an evaporative condenser (2) connected with an outlet of the compressor, a cooling device (3) connected with an outlet of the evaporative condenser, a throttling device (5) connected with an outlet of the cooling device, an evaporator (8), a first regulating valve and a second regulating valve; the throttling device (5) is connected with the evaporator (8) through a pipeline, a cooling auxiliary path (12) is arranged on the pipeline, and part of the cooling auxiliary path penetrates into the cooling device (3); the first regulating valve is arranged on the pipeline, and the second regulating valve is arranged on the cooling auxiliary road (12).
2. The evaporative condensing water chilling unit with a liquid cooling device according to claim 1, characterized in that: a liquid storage device (20) and a drying filter (30) are sequentially arranged between the outlet cooling devices (3) of the evaporative condenser (2).
3. The evaporative condensing water chilling unit with a liquid cooling device according to claim 1, characterized in that: pressure difference exists between the joint of the cooling auxiliary road (12) and the pipeline and the joint of the pipeline and the evaporator (8), and a part of medium conveyed in the pipeline can enter the cooling auxiliary road (12).
4. The evaporative condensing water chilling unit with a liquid cooling device according to claim 1, characterized in that: and a cooling auxiliary road (12) is provided with an auxiliary road throttling device (11).
5. The evaporative condensing water chilling unit with a liquid cooling device according to claim 1, characterized in that: evaporator (8) include barrel (81), locate end cover (82) at barrel both ends, locate water inlet and delivery port on the end cover, locate tube sheet (84) in the barrel, baffling piece (85), wear to locate heat exchange tube (86) on tube sheet and the baffling piece, locate air inlet (87) and gas outlet (88) on the barrel and be used for carrying out the buffer of drainage to the gas that air inlet (87) department entered into to barrel (81).
CN201920919754.5U 2019-06-18 2019-06-18 Evaporative condensation type water chilling unit with liquid cooling device Active CN210292406U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201920919754.5U CN210292406U (en) 2019-06-18 2019-06-18 Evaporative condensation type water chilling unit with liquid cooling device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201920919754.5U CN210292406U (en) 2019-06-18 2019-06-18 Evaporative condensation type water chilling unit with liquid cooling device

Publications (1)

Publication Number Publication Date
CN210292406U true CN210292406U (en) 2020-04-10

Family

ID=70097304

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201920919754.5U Active CN210292406U (en) 2019-06-18 2019-06-18 Evaporative condensation type water chilling unit with liquid cooling device

Country Status (1)

Country Link
CN (1) CN210292406U (en)

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