CN111412707A - Water cooling device - Google Patents
Water cooling device Download PDFInfo
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- CN111412707A CN111412707A CN202010259020.6A CN202010259020A CN111412707A CN 111412707 A CN111412707 A CN 111412707A CN 202010259020 A CN202010259020 A CN 202010259020A CN 111412707 A CN111412707 A CN 111412707A
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 557
- 238000001816 cooling Methods 0.000 title abstract description 69
- 239000000498 cooling water Substances 0.000 claims abstract description 94
- 238000003860 storage Methods 0.000 claims description 100
- 238000005192 partition Methods 0.000 claims description 62
- 230000000875 corresponding effect Effects 0.000 description 10
- 239000010865 sewage Substances 0.000 description 8
- 238000000034 method Methods 0.000 description 6
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- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- FGUUSXIOTUKUDN-IBGZPJMESA-N C1(=CC=CC=C1)N1C2=C(NC([C@H](C1)NC=1OC(=NN=1)C1=CC=CC=C1)=O)C=CC=C2 Chemical compound C1(=CC=CC=C1)N1C2=C(NC([C@H](C1)NC=1OC(=NN=1)C1=CC=CC=C1)=O)C=CC=C2 FGUUSXIOTUKUDN-IBGZPJMESA-N 0.000 description 2
- 238000003723 Smelting Methods 0.000 description 2
- 238000005520 cutting process Methods 0.000 description 2
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- 230000004888 barrier function Effects 0.000 description 1
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Classifications
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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
- F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
- F25D17/00—Arrangements for circulating cooling fluids; Arrangements for circulating gas, e.g. air, within refrigerated spaces
- F25D17/02—Arrangements for circulating cooling fluids; Arrangements for circulating gas, e.g. air, within refrigerated spaces for circulating liquids, e.g. brine
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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
- F25B1/00—Compression machines, plants or systems with non-reversible cycle
-
- 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
-
- 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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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Devices That Are Associated With Refrigeration Equipment (AREA)
Abstract
The invention discloses a cold water device, which comprises a main water delivery pipe, wherein one end of the main water delivery pipe is connected with a water delivery port of a water tank, and the other end of the main water delivery pipe is divided into three paths and is respectively connected with a first compressor, a second compressor and a third compressor; the water outlets of the first compressor, the second compressor and the third compressor are all connected with a water return port of the water tank; a water using loop is formed between the water tank and the water using equipment by utilizing the cooling water conveying pipe and the cooling water return pipe; a main pump is arranged on the water delivery main pipe, and a standby pump is arranged on the water return main pipe; according to the invention, the plurality of compressors are connected with the water tank to form the cooling system, the water tank is connected with the water utilization equipment to form the cold water output system, the cooling system is utilized to cool the cooling water, the cold water output system outputs the cooling water to the water utilization equipment, and the cooling system and the cold water output system are mutually independent, so that the stable operation of the device is ensured; the cooling system is provided with a plurality of compressors and main and standby pump combinations, so that the cooling capacity of the water cooling device is effectively improved, and the fault tolerance rate of the device is high.
Description
Technical Field
The invention belongs to the technical field of refrigeration, and particularly relates to a cold water device.
Background
In a metallurgical plant or a laboratory, some special equipment or devices need cooling water with stable temperature, continuous supply and lower than 5 ℃, and the working environment of the equipment or the devices is higher in temperature and full of dust; for example: cooling moulds, condensers for taking dust samples from the smelting furnace, crystallizers for forced cooling of the melt, usually with temporary or low-intensity use of cooling water, possibly with water coolers.
Field and literature investigations show that: 1) the power of a common water chiller is between 1P and 3P, and the higher power needs to be customized, so that the cost is high; 2) one water chiller is generally provided with only one compressor, and if the actual temperature of water is high, the compressor is difficult to provide strong cooling in a short time; 3) generally, a simple logic switch is adopted for control, namely the actual temperature of water reaches a preset control temperature, and a compressor is started to operate; but the temperature is reduced below the preset temperature, the compressor is closed; the mode is not accurate in water temperature control, and has large power consumption and large loss on the compressor; 4) if the water cooler is damaged in the using process, the water cooler gives an alarm and cannot work normally, so that equipment using water is burnt or the experiment fails completely; 5) when the whole water temperature is higher (>45 ℃), the rapid cooling can not be realized.
From the above, the existing water chiller has limitations in use, has low cooling capacity, high cooling cost and no effective control of cold water temperature, and cannot meet the water demand under complex and severe conditions. The present invention therefore provides a water chilling apparatus that meets the above needs.
Disclosure of Invention
Aiming at the technical problems in the prior art, the invention provides a water cooling device and a control method thereof, and aims to solve the technical problems that the existing water cooling machine in a metallurgical industry field or a laboratory is low in cooling capacity, high in cooling cost and incapable of effectively controlling the temperature of cold water.
In order to achieve the purpose, the invention adopts the technical scheme that:
the invention provides a cold water device, which comprises a water tank, a first compressor, a second compressor, a third compressor, a main pump, a standby pump, a comprehensive control console, a main water delivery pipe, three branch water delivery pipes, a cooling water delivery pipe, a cooling water return pipe, three branch water return pipes and a main water return pipe;
one end of the main water delivery pipe is connected with a water delivery port of the water tank, the other end of the main water delivery pipe is divided into three paths, one path is connected with a water inlet of the first compressor through one water delivery branch pipe, the second path is connected with a water inlet of the second compressor through the second water delivery branch pipe, and the third path is connected with a water inlet of the third compressor through the third water delivery branch pipe; the water outlets of the first compressor, the second compressor and the third compressor are respectively connected with one end of a water return branch pipe, the other ends of the three water return branch pipes are combined and then connected with one end of a water return main pipe, and the other end of the water return main pipe is connected with a water return port of the water tank;
one end of the cooling water pipe is connected with a cooling water outlet of the water tank, and the other end of the cooling water pipe is connected with a water inlet of water using equipment; the water outlet of the water using equipment is connected with the cooling water return port of the water tank through a cooling water return pipe; a main pump is arranged on the water delivery main pipe, and a standby pump is arranged on the water return main pipe; the water tank, the first compressor, the second compressor, the third compressor, the main pump and the standby pump are all electrically connected with the comprehensive control console.
Furthermore, the system also comprises a water supply control valve, wherein the water supply control valve is arranged on the water delivery main pipe and is arranged between the water tank and the main pump, and the water supply control valve is electrically connected with the comprehensive control console.
The water supply system further comprises a first emergency partition valve, a second emergency partition valve and a third emergency partition valve, wherein the first emergency partition valve is arranged on one of the water delivery branch pipes, the second emergency partition valve is arranged on the second water delivery branch pipe, and the third emergency partition valve is arranged on the third water delivery branch pipe; the first emergency partition valve, the second emergency partition valve and the third emergency partition valve are all electrically connected with the comprehensive control console.
Further, the main pump and the backup pump have the same operating power.
Further, the water tank comprises a tank body, a middle partition plate and a water supply pump; the middle clapboard is vertically arranged in the box body to divide the box body into a first water storage space and a second water storage space; the center of the middle clapboard is provided with an overflowing hole, and the first water storage space is communicated with the second water storage space through the overflowing hole;
the water delivery port and the cooling water outlet are arranged at the top of the first water storage space, and the water supply pump is arranged at the bottom of the first water storage space, is arranged in the middle of the box body and is communicated with the cooling water outlet through a pipeline; the water return port and the cooling water return port are both arranged at the top of the second water storage space;
the top of the second water storage space is also provided with a water supply port which is connected with a water source through a pipeline; and a sewage draining outlet is arranged at the bottom of the second water storage space and is connected with a sewage draining system through a pipeline.
Furthermore, the water tank also comprises two temperature measuring devices, wherein one temperature measuring device is arranged on the side plate of the first water storage space, and the other temperature measuring device is arranged on the bottom plate of the first water storage space; the output ends of the two temperature measuring devices are electrically connected with the comprehensive control console.
Further, the middle partition plate comprises a partition plate body and an overflowing baffle plate, the partition plate body is vertically fixed in the box body, the box body is divided into a first water storage space and a second water storage space by the partition plate body, and the volume ratio of the first water storage space to the second water storage space is 2: 1;
the overflowing hole is arranged in the center of the partition plate body, the overflowing baffle is obliquely arranged on the overflowing hole, the upper edge of the overflowing baffle is connected with the upper edge of the overflowing hole, and the lower edge of the overflowing baffle is flush with the lower edge of the overflowing hole; the overflowing baffle inclines towards the second water storage space, and the included angle between the overflowing baffle and the vertical direction is 45 degrees.
Furthermore, the overflowing holes are circular holes or square holes, and the diameter or the side length of each overflowing hole is 1/15-1/10 of the height of the box body.
Furthermore, the first compressor, the second compressor and the third compressor are controlled in a PID control mode or a logic switch control mode.
Compared with the prior art, the invention has the beneficial effects that:
the invention provides a cold water device, which is characterized in that a plurality of compressors are connected with a water tank to form a cooling system, the water tank is connected with water utilization equipment to form a cold water output system, the cooling system is used for cooling water, the cold water output system outputs the cooling water to the water utilization equipment, and the water after heat exchange flows back to the cooling system; the cooling system and the cold water output system are mutually independent, so that the stable operation of the device is ensured; the cooling system is provided with a plurality of compressors and main and standby pump combinations, so that multi-stage efficient cooling is realized, the cooling capacity of the water cooling device is improved, and the fault tolerance of the device is high; by arranging the comprehensive control console, automatic or manual adjustment of the device is met.
Furthermore, through setting up urgent partition valve, when a certain compressor breaks down and can't operate, the integrated control platform can let corresponding urgent partition valve can cut off this way water supply and send out the police dispatch newspaper, and every urgent partition valve control a compressor does not influence the operation of other compressors, has avoided the emergence of incident, has improved the security performance of device.
Furthermore, the main pump and the standby pump adopt water pumps with the same power, so that when the main pump breaks down, the standby pump can be accurately and timely started, and the safety risk of the device is reduced.
Furthermore, a middle partition plate is arranged in a tank body of the water tank, and the tank body is divided into two water storage spaces with the volume ratio of 1:2 through the middle partition plate; the cooling water cooled by the compressor and the hot water after heat exchange of the water using equipment can be pre-mixed in the second water storage space, the mixed water enters the first water storage space to be mixed for the second time, the temperature of the cooling water is more uniform after the secondary mixing, and then the cooling water enters the cold water output system and the cooling system to be utilized, so that the stability of the system is improved; the instability of the water temperature after the compressor is cooled is avoided, and the temperature of the cooling water is ensured to meet the water temperature of the water using equipment.
Furthermore, the overflowing hole is arranged in the center of the middle partition plate, so that cold water and hot water are enabled to enter the first water storage space for secondary mixing after primary mixing in the second water storage space, stability of water temperature in the first water storage space is guaranteed, and cooling water entering the water using equipment is enabled to meet temperature requirements.
Furthermore, the flow passing plate is arranged on the partition plate body, so that water is enabled to enter the first water storage space from the second water storage space from the lower inclined direction to the upper inclined direction, and after a mixing cycle is completed in the first water storage space, the water is pumped to water utilization equipment through the water supply pump; the temperature uniformity of the cooling water entering the water-using equipment is ensured to be higher.
Further, the overflowing hole is circular or square, and the diameter or the side length of the overflowing hole is set to be 1/15-1/10 of the height of the water tank; the cold water and the hot water can enter the first water storage space after being fully mixed in the second water storage space, the formation of the first water storage space can be realized, the vertical circulation is realized, and the uniformity of the cooling water is improved.
Furthermore, according to different cooling requirements, the PID control or the logic switch is correspondingly adopted to control the operation of the compressor, so that the cooling efficiency of the device is improved, the production cost is reduced, and the fault tolerance rate of the system is higher.
In summary, the cold water device according to the present invention includes a cooling system and a cold water output system, the cooling system is configured to cool cooling water, the cold water output system is configured to output the cooling water to a water utilization device, and simultaneously, the cooling water after heat exchange flows back to the cooling system through a water return system; directly connecting the comprehensive control console with three compressors, three emergency isolating valves, a main pump, a standby pump, a water supply control valve and a temperature measuring device; the comprehensive control console can receive the feedback signals of the equipment and output corresponding action instructions according to the feedback signals, so that the on-off control of the three compressors, the three emergency isolating valves, the main pump, the standby pump, the water supply pump and the water supply control valve is realized, the automatic operation of the cold water device is realized, when the cold water device breaks down, the automatic regulation and the feedback can be realized, and the use convenience is improved; the main pump is arranged on the water delivery main pipe, the standby pump is arranged on the water return main pipe, and the main pump and the standby pump adopt water pumps with the same power; when the main pump fails and stops running, the standby pump can quickly replace the main pump to work and maintain the running of the cold water device; because the water in the water tank is pumped from bottom to top, when the main pump and the backup pump are installed at the same position, once the main pump stops running, the water gathered by the section of pipeline is reduced, and the backup pump possibly has the risk of being incapable of being started; the standby pump is arranged at the rear section of the water outlet of the compressor, so that the residual water of the compressor can ensure the normal starting of the standby pump, and the stable operation of the system is ensured; when the main pump breaks down, the standby pump is started at full power, and the opening degree of the standby pump is not controlled by the regulation of the comprehensive control console.
The emergency partition valve is arranged on each water delivery branch pipe, and the water inlet of one compressor is correspondingly controlled through one emergency partition valve, so that the independent control of the compressors is realized, and the influence on the operation of other compressors is avoided; when the cold water device works in a severe environment, dust or heat radiation can cause that a certain compressor cannot rotate or cannot discharge heat, at the moment, the compressor fails, and accidents can be caused by continuous operation; after the comprehensive control console can receive the fault signal, sending out instructions for cutting off the water supply of the compressor and stopping the operation of the compressor, controlling the corresponding emergency isolating valve to be closed, stopping the water supply and stopping the rotation of the compressor; meanwhile, the comprehensive control console can send out a fault alarm to a user to prompt the user to emergently remove the compressor fault.
The invention adopts the technical scheme that the middle partition plate is arranged in the tank body of the water tank, and the tank body is divided into two water storage spaces by the middle partition plate; in the second water storage space, the cooling water cooled by the compressor is pre-mixed with the hot water after heat exchange of the water equipment, the mixed water enters the first water storage space for secondary mixing, the temperature of the cooling water is more uniform after secondary mixing, and then the cooling water enters the cold water output system and the cooling system for utilization, so that the stability of the system is improved; the instability of the water temperature after the compressor is cooled is avoided, and the temperature of the cooling water is ensured to meet the water temperature of the water using equipment.
According to the invention, the overflowing hole is arranged in the center of the middle partition plate, the cooling water cooled by the compressor and the hot water subjected to heat exchange by the water using equipment have certain kinetic energy after entering the water tank, and if the overflowing hole is arranged at the upper end of the middle partition plate, the cold water and the hot water can directly enter the first water storage space without being fully mixed; if the overflowing hole is positioned at the bottom of the middle partition plate, cold water and hot water can be fully mixed in the second water storage space, and the fully mixed water enters the first water storage space through the overflowing hole at the bottom and is immediately pumped to water utilization equipment by the water supply pump, so that secondary mixing in the first water storage space cannot be realized; therefore, the overflowing hole is formed in the center of the middle partition plate, cold water and hot water can be mixed in the first water storage space for the second time after being mixed in the second water storage space for the first time, the stability of the water temperature in the first water storage space is guaranteed, and the cooling water entering the water using equipment is guaranteed to meet the temperature requirement.
According to the invention, the overflow plate is arranged on the partition plate body, the overflow baffle is downwards arranged at the overflow hole in an angle of 45 degrees, and the lower edge of the overflow baffle is flush with the lower edge of the overflow hole; the purpose of the method is as follows: water enters the first water storage space from the second water storage space in a downward and upward inclined manner, and is pumped to water utilization equipment through a water supply pump after a mixing cycle is completed in the first water storage space; the temperature uniformity of the cooling water entering the water-using equipment is ensured to be higher; if the lower edge of the overflow baffle is long and even touches the bottom of the water tank, the processing difficulty of the device is increased, and the device is not economical.
Drawings
FIG. 1 is a block diagram of a water chilling apparatus according to the present invention;
FIG. 2 is a schematic view of a water tank of a water chilling apparatus according to the present invention;
FIG. 3 is a schematic view of the working flow of a water chiller according to the present invention under PID control;
fig. 4 is a flow chart of the operation of the water cooling device controlled by the logic switch according to the present invention.
The system comprises a water tank 1, a first compressor 2, a second compressor 3, a third compressor 4, a water supply control valve 5, a main pump 6, a first emergency cut-off valve 7, a second emergency cut-off valve 8, a third emergency cut-off valve 9, a standby pump 10, water utilization equipment 11, a comprehensive console 12, a water source 13, a sewage discharge system 14, a main water delivery pipe 15, a branch water delivery pipe 16, a cooling water delivery pipe 17, a cooling water return pipe 18, a branch water return pipe 19 and a main water return pipe 20; 101, 102, a middle partition plate, 103, a water supply pump, 104, an overflowing hole and 105, a temperature measuring device; 1011 water delivery port, 1012 water return port, 1013 cooling water outlet, 1014 cooling water return port, 1015 water supply port, 1016 sewage outlet and 1017 cable hole; 1021 separator body, 1022 flow barrier.
Detailed Description
The present invention will be described in further detail with reference to specific embodiments.
As shown in fig. 1-2, the present invention provides a water cooling device, which comprises a water tank 1, a first compressor 2, a second compressor 3, a third compressor 4, a water supply control valve 5, a main pump 6, a first emergency cut-off valve 7, a second emergency cut-off valve 8, a third emergency cut-off valve 9, a standby pump 10, a comprehensive console 12, a water source 13, a sewage system 14, a main water pipe 15, three branch water pipes 16, a cooling water pipe 17, a cooling water return pipe 18, three branch water return pipes 19 and a main water return pipe 20.
One end of the main water delivery pipe 15 is connected with a water delivery port 1011 of the water tank 1, the main pump 6 is arranged on the main water delivery pipe 15, and a water supply control valve 5 is arranged between the main pump 6 and the water tank 1; the other end of the main water delivery pipe 15 is divided into three paths, wherein one path is connected with the water inlet of the first compressor 2 through one branch water delivery pipe 16, and the first emergency partition valve 7 is arranged on the branch water delivery pipe 16; the second path is connected with a water inlet of a second compressor 3 through a second water delivery branch pipe 16, and a second emergency partition valve 7 is arranged on the second water delivery branch pipe 16; the third path is connected with the water inlet of the third compressor 4 through a third water delivery branch pipe 16, and the third emergency partition valve 8 is arranged on the third water delivery branch pipe 16.
The water outlets of the first compressor 2, the second compressor 3 and the third compressor 4 are respectively connected with one ends of three water return branch pipes 19, the other ends of the three water return branch pipes 19 are combined and then connected with one end of a water return main pipe 20, the standby pump 10 is arranged on the water return main pipe 20, and the other end of the water return main pipe 20 is connected with a water return port 1012 of the water tank 1.
One end of the cooling water pipe 17 is connected with a cooling water outlet 1013 of the water tank 1, and the other end is connected with a water inlet of the water using equipment 11; the water outlet of the water utilization device 11 is connected with a cooling water return port 1014 of the water tank 1 through a cooling water return pipe 18.
A water supply pump 103, a first compressor 2, a second compressor 3, a third compressor 4, a water supply control valve 5, a main pump 6, a first emergency block valve 7, a second emergency block valve 8, a third emergency block valve 9 and a standby pump 10 in the water tank 1 are all electrically connected with a comprehensive console 12, and the comprehensive console 12 is used for controlling the opening and closing and operation state adjustment of the water supply pump 103, the first compressor 2, the second compressor 3, the third compressor 4, the water supply control valve 5, the main pump 6, the first emergency block valve 7, the second emergency block valve 8, the third emergency block valve 9 and the standby pump 10; the main pump 6 and the backup pump 10 have the same operation power.
The integrated control platform 12 comprises a P L C mainboard, a lower computer receiving chip and a display screen, wherein the lower computer receiving chip is used for receiving operation information of the first compressor 2, the second compressor 3, the third compressor 4, the water supply control valve 5, the main pump 6, the first emergency block valve 7, the second emergency block valve 8, the third emergency block valve 9, the standby pump 10 and the water supply pump 103, then the operation information is fed back to a logic unit of the P L C mainboard, the logic unit performs operation after receiving signals, corresponding control instructions are output according to operation results, on-off and operation state adjustment of the first compressor 2, the second compressor 3, the third compressor 4, the water supply control valve 5, the main pump 6, the first emergency block valve 7, the second emergency block valve 8, the third emergency block valve 9, the standby pump 10 and the water supply pump 103 are achieved, the operation information and the adjusted results are transmitted to the display screen, and a user can perform manual operation according to information on the display screen.
The water tank 1 comprises a tank body 101, a middle partition plate 102, a water supply pump 103 and two temperature measuring devices 105; the middle partition plate 102 is vertically arranged in the tank body 101 and divides the tank body 101 into a first water storage space and a second water storage space; preferably, the volume ratio of the first water storage space to the second water storage space is 2: 1; an overflowing hole 104 is arranged in the center of the middle partition plate 102, and the first water storage space is communicated with the second water storage space through an overflowing hole 105; the water delivery port 1011 and the cooling water outlet 1013 are disposed at the top of the first water storage space, and the water supply pump 103 is disposed on the bottom plate of the first water storage space and is disposed in the middle of the tank 101; the water outlet of the water supply pump 103 is communicated with the cooling water outlet 1013 through a pipeline, the water inlet of the water supply pump 103 is arranged downwards near the side of the middle partition plate 102, and the water supply pump 103 is electrically connected with the summation console 12; the water return port 1012, the cooling water return port 1014 and the water supply port 1015 are all arranged at the top of the second water storage space, and the water supply port 1015 is connected with the water source 13 through a pipeline; a drain 1016 is provided at the bottom of the second water storage space, and the drain 1016 is connected to the sewage system 14 through a pipe.
The two temperature measuring devices 105 are respectively arranged on the side plate and the bottom plate of the first water storage space of the water tank, and the output ends of the two temperature measuring devices 105 are electrically connected with the comprehensive control console 12; one of the temperature measuring devices 105 is arranged on the side plate of the first water storage space and is used for measuring the water temperature at 1/2 position of the upper and lower major circulation of the upper and lower cooling water in the first water storage space and transmitting the water temperature information to the integrated control console 12; the other temperature measuring device 105 is arranged on the bottom plate of the first water storage space and is used for measuring the water temperature at 3/4 position of the upper and lower major circulation of the upper and lower cooling water in the first water storage space and transmitting the water temperature information to the comprehensive control console 12; the average value of the water temperatures measured by the two temperature measuring devices 105 is the actual temperature of the cooling water in the first water storage space; by arranging the two temperature measuring devices, the temperature of the prepared cooling water supplied by the water tank can be read more accurately and objectively, and the measurement error is effectively reduced.
The two temperature measuring devices 105 are temperature measuring thermocouples, one temperature measuring thermocouple is arranged on a side plate of the first water storage space, the other temperature measuring thermocouple is arranged on a bottom plate of the first water storage space, the output end of the temperature measuring thermocouple is connected with the input end of the integrated control console connection 12 through an electric wire, cable holes 1017 are respectively arranged on the side plate and the bottom plate of the first water storage space, the electric wire is connected with the corresponding temperature measuring thermocouples after penetrating through the cable holes 1017, and waterproof treatment is carried out on the electric wire after the cable holes 1017 penetrate through the rubber rings and glue; because the cable hole at the bottom of the box body bears higher water pressure, the cable hole 1017 at the bottom of the first water storage space is processed into a funnel shape with a large upper part and a small lower part, and is blocked from the inside; the preferred temperature thermocouple uses a water temperature every 2 seconds.
The middle partition plate 102 comprises a partition plate body 1021 and an overflowing baffle 1022, wherein the partition plate body 1021 is vertically fixed in the box body 101; the overflowing hole 104 is arranged in the center of the partition body 1021, the overflowing baffle 1022 is obliquely arranged on the overflowing hole 104, the upper edge of the overflowing baffle 1022 is connected with the upper edge of the overflowing hole 104, and the lower edge of the overflowing baffle 1022 is flush with the lower edge of the overflowing hole 104; the overflowing baffle 1022 inclines towards the second water storage space, and the included angle between the overflowing baffle 1022 and the vertical direction is 45 degrees; the overflowing hole 105 is a circular hole or a square hole, and the diameter or the side length of the overflowing hole 105 is 1/15-1/10 of the height of the box body 101.
The dustproof devices are arranged at the air inlets of the first compressor 2, the second compressor 3 and the third compressor 4, so that the influence of dust on the compressors caused by the working of a cold water device in a severe environment is avoided, and the stable operation of the compressors is ensured.
The first compressor 2, the second compressor 3 and the third compressor 4 are compressors with the same or different power, and when the field cooling water demand is random and the use power of the compressors cannot be determined, the operation control of the compressors is carried out by adopting a PID control mode; specifically, when there is no cooling water demand on site, the entire cooling system remains operating at very low power; when the cooling water on site is in low demand, a low-power compressor is adopted for operation; when the on-site cooling water is in high demand, the energy consumption and the equipment loss rate can be effectively reduced by adopting a mode of full-power operation of a high-power compressor or all compressors and adopting a PID control mode.
When the following three conditions are satisfied: 1) the field available power range is less than 2.5 KW; 2) the field use power is fixed, for example, only three requirements of 0W, 750W or 1500W are required; 3) the service time and the shutdown time of the compressor are less than 1: 1; the method is characterized in that a logic switch is adopted to control the operation of the compressors, when the logic switch is adopted to control, the rated powers of the first compressor, the second compressor and the third compressor are combined from small to large, namely the rated power of the first compressor is smaller than the rated power of the second compressor and smaller than the rated power of the third compressor, the specific power can be matched according to requirements, and energy can be saved by adopting the method.
Four control temperatures are set in the comprehensive control console of the invention and represent the control levels of the system to the compressor and the water supply flow, when the actual temperature of the cooling water in the first water storage space sequentially exceeds the control values, the system can gradually increase the rotating speed of the compressor and the opening degree of the water supply control valve so as to adjust the cooling intensity; when the actual temperature of the cooling water in the first water storage space sequentially exceeds the control value, the system can close or open the corresponding compressor to adjust the cooling intensity; the four control temperatures include a first control temperature T1A second control temperature T2A third control temperature T3And a fourth control temperature T4Wherein, T1The safety range is defined as follows, the system only keeping the lowest frequency of operation, T1-T2A low warning value; t is2-T3A medium warning value; t is3-T4High early warning values; greater than T4An unacceptable state; wherein, T1＝T+ΔT、T2＝T+2ΔT、T3＝T+3ΔT、T4The value of Δ T is set mainly based on the requirement of temperature control accuracy, and may be generally 0.2 to 2 ℃.
As shown in fig. 3, when the PID is used to control the water cooling device, the logic operation flow is as follows:
a. starting a system, starting a water supply control valve, starting three compressors, performing self-checking, and then performing PID control, wherein the three compressors maintain the lowest power operation;
b. obtaining the average value of the readings of the two temperature measuring devices, namely the water temperature of the first water storage space, and judging whether the average value of the readings of the temperature measuring devices is less than the first control temperature T1When the average value of the readings of the temperature measuring device is less than the first control temperature T1During the operation, PID adjustment is carried out on the water supply control valve and the three compressors, the water supply control valve maintains the lowest flow, and the three compressors maintain the lowest power operation;
c. when the average value of the readings of the temperature measuring device is more than or equal to the first control temperature T1Time, judgeWhether the average value of the readings of the temperature measuring device is at T1-T2When the average value of the readings of the temperature measuring device is at T1-T2During the operation, performing PID adjustment on the water supply control valve and the first compressor, and adjusting the opening of the water supply control valve and the rotating speed of the first compressor to enable the operating power of the first compressor to be greater than the rotating speed of the first compressor in the step b and less than the rotating speed of the first compressor in the step d;
d. when the average value of the readings of the temperature measuring device is not at T1-T2In the middle, whether the average value of the readings of the temperature measuring device is at T or not is judged2-T3When the average value of the readings of the temperature measuring device is at T2-T3During the operation, performing PID adjustment on the water supply control valve, the first compressor and the second compressor, and adjusting the opening of the water supply control valve and the rotating speeds of the first compressor and the second compressor to enable the operating power of the first compressor and the second compressor to be larger than the rotating speed of the first compressor in the step c and smaller than the rotating speed of the first compressor in the step e;
e. when the average value of the readings of the temperature measuring device is not at T2-T3In the middle, whether the average value of the readings of the temperature measuring device is at T or not is judged3-T4When the average value of the readings of the temperature measuring device is at T3-T4During the operation, performing PID (proportion integration differentiation) adjustment on the water supply control valve, the first compressor, the second compressor and the third compressor, and adjusting the opening of the water supply control valve and the rotating speeds of the first compressor, the second compressor and the third compressor to enable the operating power of the first compressor, the second compressor and the third compressor to be larger than the rotating speed of the first compressor in the step d and smaller than the rotating speed of the first compressor in the step f;
f. when the average value of the readings of the temperature measuring device is not at T3-T4In the middle, the opening degree of the water supply control valve is adjusted to be maximum, the full-power operation of the three compressors is kept, and after the operation of one machine is delayed for time, whether the average value of the readings of the temperature measuring device is in T or not is judged again3-T4To (c) to (d);
g. when the average value of the readings of the temperature measuring device is at T3-T4BetweenDuring the operation, performing PID adjustment on the water supply control valve, the first compressor, the second compressor and the third compressor, and adjusting the opening of the water supply control valve and the rotating speeds of the first compressor, the second compressor and the third compressor to enable the operating power of the first compressor to be greater than the operating power of the first compressor in the step d and less than the full power of the first compressor;
h. and (b) step (g).
As shown in fig. 4, when the logic switch is used to control the water cooling device, the logic operation flow is as follows:
a. starting a system, starting a water supply control valve, starting three compressors and carrying out self-checking;
b. obtaining the average value of the readings of the two temperature measuring devices, namely the water temperature of the first water storage space, and judging whether the average value of the readings of the temperature measuring devices is less than the first control temperature T1(ii) a When the average value of the readings of the temperature measuring device is less than the first control temperature T1If so, starting the first compressor;
c. when the average value of the readings of the temperature measuring device is more than or equal to the first control temperature T1Then, whether the average value of the readings of the temperature measuring device is at T or not is judged1-T2When the average value of the readings of the temperature measuring device is at T1-T2When the first compressor is started, the second compressor is started;
d. when the average value of the readings of the temperature measuring device is not at T1-T2In the middle, whether the average value of the readings of the temperature measuring device is at T or not is judged2-T3When the average value of the readings of the temperature measuring device is at T2-T3When the first compressor is started, the first compressor and the third compressor are started;
e. when the average value of the readings of the temperature measuring device is not at T2-T3In the middle, whether the average value of the readings of the temperature measuring device is at T or not is judged3-T4When the average value of the readings of the temperature measuring device is at T3-T4When the first compressor is started, the second compressor and the third compressor are started;
f. when the average value of the readings of the temperature measuring device is not at T3-T4When the power is not enough, the three compressors are started to run at full power;after running a machine for a delay time, judging again whether the average value of the readings of the temperature measuring device is at T3-T4To (c) to (d);
g. when the average value of the readings of the temperature measuring device is at T3-T4When the first compressor is started, the second compressor and the third compressor are started;
h. and (b) step (g).
When the logic switch control is adopted, the working frequencies of the first compressor, the second compressor and the third compressor are fixed frequencies, and only two options are switched; the power or the rotating speed among the three compressors is different, and when the logical switch is controlled, the power of the three compressors is combined according to small, medium and large; assuming that the rated power of the first, second, and third compressors is 1, 2, and 3, respectively, the power of step c is 1+2 to 3, the power of step d is 1+3 to 4, the power of step e is 2+3 to 5, and the power of step f is 1+2+3 to 6, which are sequentially increased to cope with the rising control temperature.
Principle of operation
The invention relates to a cold water device which comprises a cooling system and a cold water output system, wherein the cooling system is used for cooling water, the cold water output system is used for outputting the cooling water to water utilization equipment, and meanwhile, the cooling water after heat exchange flows back to the cooling system through a return water system.
In the cooling system, a main pump is connected with a water tank through a water delivery main pipe, a water supply control valve is arranged on the water delivery main pipe, water to be cooled in the water tank is pumped by the main pump, the water to be cooled is divided into three paths after being pumped by the main pump, and the water to be cooled enters a corresponding compressor for cooling after passing through an emergency isolating valve respectively; after cooling water is cooled by the compressor, the cooling water flows out from a water outlet of the compressor, enters the return main pipe after passing through the return branch pipe, and returns to the water tank after passing through a standby pump on the return main pipe; the water supply port on the water tank is connected with a water source through a pipeline, and water supplement to the cooling system is realized.
In the cold water output system, the water supply pump is arranged at the bottom of the first water storage space, the water supply pump extracts cooling water in the first water storage space, the cooling water enters the water utilization equipment through the cooling water pipe and then exchanges heat, and the cooling water after exchanging heat can flow to the second water storage space through the cooling water return pipe.
In the invention, a comprehensive control console is directly connected with three compressors, three emergency isolating valves, a main pump, a standby pump, a water supply control valve and a temperature measuring device; the comprehensive control console can receive the feedback signals of the equipment, and outputs corresponding action instructions according to the feedback signals, so that the on-off control of the three compressors, the three emergency isolating valves, the main pump, the standby pump, the water supply pump and the water supply control valve is realized, the automatic operation of the water cooling device is realized, when the water cooling device breaks down, the water cooling device can be automatically adjusted and fed back, and the use convenience is improved.
According to the water cooling device, the main pump and the standby pump are arranged, the main pump is arranged on the water delivery main pipe, the standby pump is arranged on the water return main pipe, and the main pump and the standby pump adopt water pumps with the same power; when the main pump fails and stops running, the standby pump can quickly replace the main pump to work and maintain the running of the cold water device; because the water in the water tank is pumped from bottom to top, when the main pump and the backup pump are installed at the same position, once the main pump stops running, the water gathered by the section of pipeline is reduced, and the backup pump possibly has the risk of being incapable of being started; the standby pump is arranged at the rear section of the water outlet of the compressor, so that the residual water of the compressor can ensure the normal starting of the standby pump, and the stable operation of the system is ensured; when the main pump breaks down, the standby pump is started at full power and is not controlled by the regulation of the comprehensive control console.
According to the invention, the emergency partition valve is arranged on each water delivery branch pipe, and the water inlet of one compressor is correspondingly controlled through one emergency partition valve, so that the independent control of the compressors is realized, and the influence on the operation of other compressors is avoided; when the cold water device works in a severe environment, dust or heat radiation can cause that a certain compressor cannot rotate or cannot discharge heat, at the moment, the compressor fails, and accidents can be caused by continuous operation; after the comprehensive control console can receive the fault signal, sending out instructions for cutting off the water supply of the compressor and stopping the operation of the compressor, controlling the corresponding emergency isolating valve to be closed, stopping the water supply and stopping the rotation of the compressor; meanwhile, the comprehensive control console can send out a fault alarm to a user to prompt the user to emergently remove the compressor fault.
The cooling system and the cold water output system are arranged independently, and when one system of the cooling system and the cold water output system breaks down, the normal operation of the other system cannot be influenced in a short time; in the prior art, after a cold water system provides cooling water for water utilization equipment, the cooling water directly enters a compressor after heat exchange, flows to a water tank after being compressed and refrigerated by the compressor, and is simultaneously interrupted when a water pump in the compressor fails; or the water supply cannot be stopped when the compressor fails to operate, which can cause serious safety accidents; the cooling system and the cold water output system are arranged independently, so that independent water supply for the compressor and the water using equipment is realized, the safety of the device is effectively improved, and the stable operation of the cold water device is ensured; the cooling system and the cold water output system are arranged independently, so that the running efficiency of the cold water device is effectively improved, and the cooling efficiency of the cooling system can be designed independently; generally, the water consumption of the water consumption equipment is different from that of the cooling system, and if the water consumption equipment and the cooling system are incorporated into the same system, the flow rate is not compatible; in the invention, the flow of the two is independently controlled, so that the system efficiency is higher; meanwhile, the cooling system and the cold water output system are arranged independently, so that the complexity of the cold water device is reduced, the equipment is convenient to repair and replace, and the equipment maintenance time is reduced.
The invention adopts the technical scheme that a middle clapboard is arranged in a box body of a water tank, and the box body is divided into two water storage spaces by the middle clapboard; in the second water storage space, the cooling water cooled by the compressor is pre-mixed with the hot water after heat exchange of the water equipment, the mixed water enters the first water storage space for secondary mixing, the temperature of the cooling water is more uniform after secondary mixing, and then the cooling water enters the cold water output system and the cooling system for utilization, so that the stability of the system is improved; the instability of the water temperature after the compressor is cooled is avoided, and the temperature of the cooling water is ensured to meet the water temperature of the water using equipment.
According to the invention, the overflowing hole is arranged in the center of the middle partition plate, the cooling water cooled by the compressor and the hot water subjected to heat exchange by the water using equipment have certain kinetic energy after entering the water tank, and if the overflowing hole is arranged at the upper end of the middle partition plate, the cold water and the hot water can directly enter the first water storage space without being fully mixed; if the overflowing hole is positioned at the bottom of the middle partition plate, cold water and hot water can be fully mixed in the second water storage space, and the fully mixed water enters the first water storage space through the overflowing hole at the bottom and is immediately pumped to water utilization equipment by the water supply pump, so that secondary mixing in the first water storage space cannot be realized; therefore, the overflowing hole is formed in the center of the middle partition plate, cold water and hot water can be mixed in the first water storage space for the second time after being mixed in the second water storage space for the first time, the stability of the water temperature in the first water storage space is guaranteed, and cooling water entering the water using equipment is guaranteed to meet the temperature requirement.
According to the invention, the overflow plate is arranged on the partition plate body, the overflow baffle is downwards arranged at the overflow hole in an angle of 45 degrees, and the lower edge of the overflow baffle is flush with the lower edge of the overflow hole; the purpose of the method is as follows: water enters the first water storage space from the second water storage space in a downward and upward inclined manner, and is pumped to water utilization equipment through a water supply pump after a mixing cycle is completed in the first water storage space; the temperature uniformity of the cooling water entering the water-using equipment is ensured to be higher; if the lower edge of the overflow baffle is long and even touches the bottom of the water tank, the processing difficulty of the device is increased, and the device is not economical.
The overflowing hole is circular or square, and the diameter or side length of the overflowing hole is 1/15-1/10 of the height of the water tank; the reason is that the intermediate partition plate cannot effectively delay the uniform mixing due to the overlarge overflowing hole, and cannot achieve the purpose of pre-uniform mixing; in the experiment, when the diameter or the side length is larger than 1/8 of the height of the water tank, the effect of pre-mixing is obviously deteriorated; when the diameter or the side length is larger than the height of the water tank and reaches 1/3, the middle partition plate loses the function; when the overflowing hole is too small, the speed of the passing water column is high, the flow field can be in a turbulent flow state, and the first water storage space of the water tank is not favorable for forming up-down large circulation; secondly, the turbulent flow field enables the water pump to pump more air, and the cooling efficiency of the compressor and the water-consuming equipment is reduced, and the equipment safety is not facilitated.
For the setting of the size of the overflowing hole, when the size of the overflowing hole cannot be determined, the size can be determined through running tests; the test method comprises the following steps: respectively arranging three different intermediate partition plates, wherein the sizes of overflowing holes are 1/5, 1/9 and 1/13, operating a cold water device, supplying a water using device which can stably consume cooling water, and observing temperature values of a water tank caused by different overflowing holes; and then drawing a corresponding curve of the temperature and the size, finding the minimum value of the curve which is the most reasonable size of the overflowing hole, and if a smooth curve cannot be drawn, automatically increasing the test points.
In the invention, the water delivery main pipe is arranged at the upper left corner of the box body, the water supply pump is arranged at the middle part of the box body, and the water inlet of the water supply pump is arranged at the lower right part, therefore, the invention has the advantages that: the requirement of the cooling system on the uniformity of water temperature is not high, the incoming water can be continuously cooled as long as the compressor is operated, and the continuous refrigeration of the system and the output of cooling water are not influenced; the water supply pump is arranged at the tail end of the upper and lower major circulation of the first water storage space in the water tank, and the water temperature at the tail end is the highest in uniformity degree.
In the invention, the water source and the sewage system are not connected with the comprehensive console because: when the movable water chiller is used, the water source and a sewage system are usually separated, and the arrangement of an automatic switch has no practical significance; when the water is drained, if the water is separated from the power supply, the automatic control cannot be closed or started; even if water sources exist, if the external water pressure is unstable, once the automatically controlled electromagnetic valve is out of control, the water enters or is drained too much, and safety accidents can be caused.
Examples
In this embodiment, when the cooling water is supplied to the high-temperature condenser by using the water cooling device, the high-temperature condenser is used for collecting volatile substances escaping from reactants under the protection of nitrogen and in a smelting environment of 1200 ℃.
When the temperature of the input cooling water is controlled by a system, the room temperature is 36 ℃, and the target temperature of the high-temperature condenser is 300 ℃; at this temperature, the condensation temperature of such volatile substances is indicated. The ratio of the collected substances is shown in table 1, and the condenser temperature is shown in table 2.
TABLE 1 theoretical weight loss, actual weight loss and collected quantities of the smelted material
TABLE 2 temperature in the center of the condenser, number 1 as an example, reaction time 10min
Theoretically, the lower the temperature of the condenser, the closer to 100% the condensed matter collected; the cold water system provides cooling water for the collector aiming at the set temperature, so that the collection rate is basically maintained to be more than 90%, and the cooling effect is good, as shown in table 1. The equipment can automatically adjust the water supply amount according to the target temperature, so that the target temperature is maintained in a certain range; in the case shown in table 2, the average fluctuation rate of the condenser temperature was 96.87%, indicating that the cooling system is very precise in controlling the temperature.
The flow of the cold water device can be automatically or manually adjusted, the cold water device can work under high load for a long time, and the cold water device is relatively low in manufacturing cost and movable; the cooling function and the cooling water output function are realized by two independent systems, and the cooling system can be controlled by a PID (proportion integration differentiation) or a logic switch. The combination of multiple compressors and the main and standby pumps can continue to operate and maintain on line under the condition that a certain unit is damaged, and the use of cooling water is not influenced. The invention can realize a multi-stage powerful water cooling system and can provide cooling water with stable temperature and adjustable flow for water-consuming equipment; the water cooling device can be moved, can be used for a long time under severe conditions, is easy to maintain, has high system fault tolerance rate, and can continue to work and maintain on line when a fault occurs.
The above description is only illustrative of the preferred embodiments of the present invention, and any structural changes, improvements, modifications, etc. made without departing from the principle of the present invention are deemed to be within the scope of the present invention.
Claims (9)
1. A cold water device is characterized by comprising a water tank (1), a first compressor (2), a second compressor (3), a third compressor (4), a main pump (6), a standby pump (10), a comprehensive control console (12), a water delivery main pipe (15), three water delivery branch pipes (16), a cooling water delivery pipe (17), a cooling water return pipe (18), three water return branch pipes (19) and a water return main pipe (20);
one end of the main water delivery pipe (15) is connected with a water delivery port (1011) of the water tank (1), the other end of the main water delivery pipe (15) is divided into three paths, one path is connected with a water inlet of the first compressor (2) through one water delivery branch pipe (16), the second path is connected with a water inlet of the second compressor (3) through the second water delivery branch pipe (16), and the third path is connected with a water inlet of the third compressor (4) through the third water delivery branch pipe (16); the water outlets of the first compressor (2), the second compressor (3) and the third compressor (4) are respectively connected with one end of a water return branch pipe (19), the other ends of the three water return branch pipes (19) are combined and then connected with one end of a water return main pipe (20), and the other end of the water return main pipe (20) is connected with a water return port (1012) of the water tank (1);
one end of the cooling water pipe (17) is connected with a cooling water outlet (1013) of the water tank (1), and the other end is connected with a water inlet of the water using equipment (11); a water outlet of the water using equipment (11) is connected with a cooling water return port (1014) of the water tank (1) through a cooling water return pipe (18); a main pump (6) is arranged on the water delivery main pipe (15), and a standby pump (10) is arranged on the water return main pipe (20); the water tank (1), the first compressor (2), the second compressor (3), the third compressor (4), the main pump (6) and the standby pump (10) are all electrically connected with the comprehensive control console (12).
2. A cold water plant according to claim 1, further comprising a water supply control valve (5), the water supply control valve (5) being arranged on the water main (15) and between the water tank (1) and the main pump (6), the water supply control valve (5) being electrically connected to the integrated control console (12).
3. A cold water device according to claim 1, further comprising a first emergency shut-off valve (7), a second emergency shut-off valve (8) and a third emergency shut-off valve (9), the first emergency shut-off valve (7) being arranged in one of the water delivery branches (16), the second emergency shut-off valve (8) being arranged in the second water delivery branch (16), the third emergency shut-off valve (9) being arranged in the third water delivery branch (16); the first emergency partition valve (7), the second emergency partition valve (8) and the third emergency partition valve (9) are electrically connected with the comprehensive control console (12).
4. A cold water plant according to claim 1, wherein the main pump (6) and the back-up pump (10) are operated at the same power.
5. A cold water device according to claim 1, wherein the water tank (1) comprises a tank body (101), an intermediate partition (102) and a water supply pump (103); the middle clapboard (102) is vertically arranged in the box body (101) and divides the box body (101) into a first water storage space and a second water storage space; the center of the middle clapboard (102) is provided with an overflowing hole (105), and the first water storage space is communicated with the second water storage space through the overflowing hole (105);
the water delivery port (1011) and the cooling water outlet (1013) are arranged at the top of the first water storage space, the water supply pump (103) is arranged at the bottom of the first water storage space, is arranged in the middle of the box body (101), and is communicated with the cooling water outlet (1013) through a pipeline; the water return port (1012) and the cooling water return port (1014) are both arranged at the top of the second water storage space;
the top of the second water storage space is also provided with a water supply port (1015), and the water supply port (1015) is connected with a water source (13) through a pipeline; the bottom of the second water storage space is provided with a drain outlet (1016), and the drain outlet (1016) is connected with a drain system (14) through a pipeline.
6. A cold water device according to claim 5, wherein the water tank (1) further comprises two temperature measuring devices (105), one of the temperature measuring devices (105) is arranged on the side plate of the first water storage space, and the other temperature measuring device (105) is arranged on the bottom plate of the first water storage space; the output ends of the two temperature measuring devices (105) are electrically connected with the comprehensive control console (12).
7. A cold water device according to claim 5, wherein the middle partition (102) comprises a partition body (1021) and an overflow baffle (1022), the partition body (1021) is vertically fixed in the tank body (101), the partition body (1021) divides the tank body (101) into a first water storage space and a second water storage space, and the volume ratio of the first water storage space to the second water storage space is 2: 1;
the overflowing hole (104) is arranged in the center of the partition plate body (1021), the overflowing baffle (1022) is obliquely arranged on the overflowing hole (104), the upper edge of the overflowing baffle (1022) is connected with the upper edge of the overflowing hole (104), and the lower edge of the overflowing baffle (1022) is flush with the lower edge of the overflowing hole (104); the overflowing baffle (1022) inclines towards the second water storage space, and the included angle between the overflowing baffle (1022) and the vertical direction is 45 degrees.
8. A cold water device according to claim 5, wherein the overflowing hole (105) is a circular hole or a square hole, and the diameter or the side length of the overflowing hole (105) is 1/15-1/10 of the height of the tank body (101).
9. A cold water plant according to claim 1, characterized in that the first compressor (2), the second compressor (3) and the third compressor (4) are controlled by PID control or by logic on-off control.
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| CN204806782U (en) * | 2015-06-21 | 2015-11-25 | 德州天工制冷电器有限公司 | Novel low temperature water tank |
| CN207610453U (en) * | 2017-10-26 | 2018-07-13 | 天津万事达印铁包装容器有限公司 | Workshop cooling water feed system |
| CN209978475U (en) * | 2019-04-18 | 2020-01-21 | 巨石集团有限公司 | Impregnating compound refrigerating system |
| CN210128526U (en) * | 2019-05-23 | 2020-03-06 | 合肥丰蓝电器有限公司 | Water-cooling unit for multi-path liquid supply at different temperatures |
| CN210197600U (en) * | 2019-06-18 | 2020-03-27 | 福建省建筑设计研究院有限公司 | Secondary pump variable flow chilled water system with energy storage device |
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