CN116614999A - Dual-circulation cooling device and cooling method for charging gun - Google Patents
Dual-circulation cooling device and cooling method for charging gun Download PDFInfo
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- CN116614999A CN116614999A CN202310582144.1A CN202310582144A CN116614999A CN 116614999 A CN116614999 A CN 116614999A CN 202310582144 A CN202310582144 A CN 202310582144A CN 116614999 A CN116614999 A CN 116614999A
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- 238000001816 cooling Methods 0.000 title claims abstract description 84
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 302
- 239000007788 liquid Substances 0.000 claims abstract description 152
- 239000000110 cooling liquid Substances 0.000 claims abstract description 144
- 230000017525 heat dissipation Effects 0.000 claims abstract description 27
- 230000009977 dual effect Effects 0.000 claims description 11
- 238000012360 testing method Methods 0.000 claims description 7
- 238000000034 method Methods 0.000 claims description 5
- 238000001514 detection method Methods 0.000 claims description 4
- 239000013589 supplement Substances 0.000 claims description 4
- 238000005259 measurement Methods 0.000 claims description 3
- 238000004064 recycling Methods 0.000 claims 1
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 description 11
- 229920002545 silicone oil Polymers 0.000 description 10
- 238000001914 filtration Methods 0.000 description 7
- 239000000243 solution Substances 0.000 description 5
- 238000009423 ventilation Methods 0.000 description 5
- 238000013461 design Methods 0.000 description 4
- 238000004334 fluoridation Methods 0.000 description 4
- WGCNASOHLSPBMP-UHFFFAOYSA-N hydroxyacetaldehyde Natural products OCC=O WGCNASOHLSPBMP-UHFFFAOYSA-N 0.000 description 4
- 238000002156 mixing Methods 0.000 description 4
- 239000012535 impurity Substances 0.000 description 3
- 238000009825 accumulation Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000005192 partition Methods 0.000 description 2
- 230000005855 radiation Effects 0.000 description 2
- 238000012546 transfer Methods 0.000 description 2
- 208000019901 Anxiety disease Diseases 0.000 description 1
- 230000036506 anxiety Effects 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 239000002826 coolant Substances 0.000 description 1
- 239000012809 cooling fluid Substances 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
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Classifications
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K7/00—Constructional details common to different types of electric apparatus
- H05K7/20—Modifications to facilitate cooling, ventilating, or heating
- H05K7/20218—Modifications to facilitate cooling, ventilating, or heating using a liquid coolant without phase change in electronic enclosures
- H05K7/20272—Accessories for moving fluid, for expanding fluid, for connecting fluid conduits, for distributing fluid, for removing gas or for preventing leakage, e.g. pumps, tanks or manifolds
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L53/00—Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles
- B60L53/10—Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles characterised by the energy transfer between the charging station and the vehicle
- B60L53/14—Conductive energy transfer
- B60L53/16—Connectors, e.g. plugs or sockets, specially adapted for charging electric vehicles
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L53/00—Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles
- B60L53/30—Constructional details of charging stations
- B60L53/302—Cooling of charging equipment
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K7/00—Constructional details common to different types of electric apparatus
- H05K7/20—Modifications to facilitate cooling, ventilating, or heating
- H05K7/20218—Modifications to facilitate cooling, ventilating, or heating using a liquid coolant without phase change in electronic enclosures
- H05K7/20281—Thermal management, e.g. liquid flow control
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/70—Energy storage systems for electromobility, e.g. batteries
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/7072—Electromobility specific charging systems or methods for batteries, ultracapacitors, supercapacitors or double-layer capacitors
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02T90/10—Technologies relating to charging of electric vehicles
- Y02T90/12—Electric charging stations
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- Engineering & Computer Science (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Power Engineering (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
Abstract
The invention provides a double-circulation cooling device and a cooling method of a charging gun, comprising the following steps: the device comprises a water pump, a water diversion unit, a liquid storage unit and a heat dissipation unit. The water pump comprises a first water pump and a second water pump. The first water pump, the water diversion unit and the liquid storage unit are sequentially connected to form a first circulating system. The second water pump, the heat radiating unit and the liquid storage unit are sequentially connected to form a second circulating system. The first circulation system and the second circulation system exchange working medium and heat in the liquid storage unit. The cooling liquid of the double-circulation cooling system used by the invention can flow through the working units of the circulation cooling system through a plurality of loops, and the liquid storage unit is skillfully used as a working medium and heat exchange place between the first circulation and the second circulation, the flow of the cooling liquid in the liquid storage unit is switched to different loops, the water resistance of the cooling liquid flowing through the loops is small, the running pressure of components in each loop is small, and the reliability of the cooling device of the charging gun is greatly improved.
Description
Technical Field
The invention belongs to the technical field of cooling, and particularly relates to the field of cooling of a charging gun.
Background
Along with the rapid growth of new energy vehicles, great impact is brought to the traditional fuel vehicle market, in order to solve the problem of journey anxiety of the last short plate of the new energy vehicles, many manufacturers push 500KW, 600KW and 800KW super charging piles, and compared with the early quick charging, engineers further improve the early quick charging piles in order to solve the problems of thermal runaway and excessively heavy charging guns during the quick charging, and begin to radiate heat of the charging guns and cables by adopting a liquid cooling method.
The existing charging gun adopts a liquid-cooled single-circulation cooling system, and cooling liquid directly flows through all working units of the circulation cooling system only through one loop, so that the circulation route is long, the number of the working units is numerous, water resistance in the circulation system is overlarge, the operation pressure is high, and damage to some working units in the system is easy to cause. The existing liquid cooling charging gun cooling device adopting a double-circulation system and a multi-circulation system mostly uses valves such as electromagnetic valves, check valves and the like to switch the flow directions of pipelines, and as long as any valve element fails, the whole cooling device cannot normally operate, so that the reliability of the cooling device is greatly reduced.
Therefore, in the related art, the cooling system of the charging gun has the problem of unreliable operation, and the cooling requirement of the super charging pile cannot be met.
Disclosure of Invention
The invention aims to solve the technical problem of low reliability of a cooling device in the related art by providing a double-circulation cooling device for a charging gun.
In order to solve the technical problems, the present invention is thus implemented, and provides a dual-cycle cooling device for a charging gun, comprising: the device comprises a water pump, a water diversion unit, a liquid storage unit and a heat dissipation unit;
the water pump comprises a first water pump and a second water pump;
the first water pump, the water diversion unit and the liquid storage unit are sequentially connected to form a first circulation system, the liquid storage unit is used for storing cooling liquid, and the first water pump is used for driving the cooling liquid to flow in the first circulation system;
the second water pump, the heat radiating unit and the liquid storage unit are sequentially connected to form a second circulating system, and the second water pump is used for driving the cooling liquid to flow in the second circulating system;
the first circulation system and the second circulation system exchange working medium and heat in the liquid storage unit.
Further, the liquid storage unit comprises a box body, a first circulating water outlet, a first circulating water return port, a second circulating water outlet and a second circulating water return port, wherein the other ends of the first circulating water outlet, the first circulating water return port, the second circulating water outlet and the second circulating water return port are all connected with the box body;
one end of the first circulating water outlet is connected with the first water pump;
one end of the first circulating water return port is connected with the water diversion unit;
one end of the second circulating water outlet is connected with the second water pump;
one end of the second circulating water return port is connected with the heat radiating unit.
Further, the tank includes a first circulation chamber, a second circulation chamber, a first water return passage, and a second water return passage;
the box body is provided with a shared chamber outside the first circulating chamber and the second circulating chamber, and the first circulating chamber and the second circulating chamber are communicated with the shared chamber;
the two ends of the first water return passage are respectively communicated with the first circulating water return port and the first circulating chamber, and the first circulating water outlet is communicated with the first circulating chamber; the two ends of the second water return passage are respectively communicated with the second circulating water return port and the second circulating chamber, and the second circulating water outlet is communicated with the second circulating chamber.
Further, the connection part of the first water return passage and the first circulation chamber is not higher than the preset liquid minimum level of the tank body, the connection part of the second water return passage and the second circulation chamber is not higher than the preset liquid minimum level of the tank body, the highest point of the connection parts of the first circulation chamber and the second circulation chamber and the common chamber is lower than the preset minimum level of the tank body, and the lowest point of the connection parts of the first circulation chamber and the second circulation chamber and the common chamber is not lower than the bottom of the tank body.
Further, the box body also comprises a liquid filling port and a liquid level system;
the liquid adding port is arranged on the surface of the box body and is used for being connected with a device for adding cooling liquid so as to supplement the cooling liquid into the box body by the device;
the liquid level system comprises a liquid level sensor and an early warning assembly, wherein a detection site of the liquid level sensor is positioned at the lowest liquid level of preset liquid of the box body; the early warning component is connected with the liquid level sensor.
Further, the dual-circulation cooling device of the charging gun further comprises a filtering unit, one end of the filtering unit is connected with the heat radiating unit, and the other end of the filtering unit is connected with the first circulation water return port.
Further, the height of the first circulating water outlet is higher than that of the second circulating water outlet, and the second circulating water outlet is flush with the bottom of the box body.
Further, the water diversion unit comprises a water diversion device and a charging gun cooling pipe;
the water separator comprises a water separator water outlet and a water separator water return port;
the charging gun cooling pipe comprises a charging gun liquid outlet and a charging gun liquid return port;
one end of the water outlet of the water separator is connected with the liquid storage unit, and the other end of the water outlet of the water separator is connected with the liquid outlet of the charging gun; one end of the water return port of the water separator is connected with the first water pump, and the other end of the water return port of the water separator is connected with the liquid return port of the charging gun.
Further, the dual-circulation cooling device of the charging gun further comprises a temperature sensor and a control unit, wherein the temperature sensor is installed on the liquid storage unit, the water return port of the water separator and the heat dissipation unit, and the control unit is connected with the temperature sensor.
Further, the heat dissipation unit comprises a fan and a radiator, one end of the radiator is connected with the liquid storage unit, the other end of the radiator is connected with the second water pump, and the fan is used for driving outside air to pass through the radiator.
Further, the cooling liquid can be water, glycol solution, silicone oil or electronic fluoridation liquid.
The invention also discloses a double-circulation cooling method of the charging gun, which comprises the following steps:
when the cooling liquid used by the double-circulation cooling device of the charging gun is electronic fluorinated liquid or glycol water solution:
when the charging gun starts to work, the first circulation system is started, after a preset time period is operated, when T2 is more than N1 and T2 is more than T1, the second circulation system starts to work, and the heat radiating unit is started;
when the charging gun stops working and T2 is less than N1, the first circulation system stops working; when the delta T is more than or equal to a ℃, the second circulation system still operates according to a preset program, and the larger the delta T is, the larger the power of the second circulation system is; when delta T is less than adeg.C, the second circulation system is closed;
when the cooling liquid used by the charge gun double-circulation cooling device is silicone oil:
when the charging gun starts to work, the first circulation system is started, after a preset time period is operated, when T2 is more than N2 and T2 is more than T1, the second circulation system starts to work, and the heat dissipation unit starts to dissipate heat;
whether the charging gun works or not, when the delta T is more than or equal to a ℃ and the T1 is more than N2, the second circulation system operates according to a preset program, and the larger the delta T is, the larger the power of the second circulation system is; when delta T is less than adeg.C, the second circulation system is closed; when T1 is less than N2, the first water pump is intermittently started to generate heat, so that N2-bdeg.C is less than T1 and less than N2+bdeg.C;
t1 is the temperature of the cooling liquid in the liquid storage unit;
t2 is the temperature of the cooling liquid flowing through the water return port of the water separator;
t6 is the temperature of the air outside the heat radiating unit;
n1 is a set temperature, and is a critical temperature when the heat radiating unit is started to radiate heat;
n2 is the optimal working temperature of the cooling liquid, is the target working temperature when the heat dissipation unit is started to dissipate heat, and N2 is matched through test measurement and cannot be changed at will;
Δt is the difference between the temperature of the cooling liquid in the common chamber and the temperature of the air outside the heat dissipating unit, and Δt=t1 to T6
a is the contrast temperature of delta T, and the matching is tested by a test;
b is the fluctuation value of the optimal working temperature of the cooling liquid, and is set according to different cooling liquids.
Compared with the prior art, the invention has the beneficial effects that:
the invention adopts a double-circulation cooling device of a charging gun, which comprises a first circulation system formed by sequentially connecting a first water pump, a water diversion unit and a liquid storage unit, and a second circulation system formed by sequentially connecting a second water pump, a heat dissipation unit and the liquid storage unit, wherein the first circulation system and the second circulation system exchange working media and heat in the liquid storage unit. The cooling liquid of the double-circulation cooling system used by the invention can flow through the working units of the circulation cooling system through a plurality of loops, and the liquid storage unit is skillfully used as a working medium and heat exchange place between the first circulation and the second circulation, the flow of the cooling liquid in the liquid storage unit is switched to different loops, the water resistance of the cooling liquid flowing through the loops is small, the running pressure of components in each loop is small, the pipeline flow direction is switched without adopting valves such as electromagnetic valves and check valves, the components in the circulation backflow are not easy to damage, the reliability of the charging gun cooling device is greatly improved, and the application requirements of the super charging pile can be more met.
Drawings
FIG. 1 is a schematic diagram of a dual cycle cooling device of a charging gun according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of a liquid storage device according to an embodiment of the invention;
fig. 3 is a front view of the structure of the case in the embodiment of the present invention.
In the drawings, each reference numeral denotes: 1. a water pump; 11. a first water pump; 12. a second water pump; 2. a water dividing unit; 21. a water separator; 211. a water outlet of the water separator; 212. a water return port of the water knockout drum; 22. a charging gun cooling tube; 221. a charging gun liquid outlet; 222. a liquid return port of the charging gun; 3. a liquid storage unit; 31. a case; 311. a first circulation chamber; 312. a second circulation chamber; 313. a common chamber; 314. a circular opening; 315. a liquid adding port; 316. a first water return passage; 317. a second water return passage; 32. a liquid level system; 33. a first circulating water outlet; 34. a first circulation water return port; 35. a second circulating water outlet; 36. a second circulation water return port; 4. a heat radiation unit; 41. a blower; 42. a heat sink; 5. and a filtering unit.
Detailed Description
The present invention will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present invention more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.
Examples:
in this embodiment, as shown in fig. 1, a dual circulation cooling device for a charging gun includes a water pump 1, a water dividing unit 2, a liquid storage unit 3, and a heat radiating unit 4. Wherein the water pump 1 comprises a first water pump 11 and a second water pump 12.
The first water pump 11, the water diversion unit 2 and the liquid storage unit 3 are sequentially connected to form a first circulation system, the liquid storage unit 3 is used for storing cooling liquid, and the first water pump 11 is used for driving the cooling liquid to flow in the first circulation system. The second water pump 12, the heat dissipation unit 4 and the liquid storage unit 3 are sequentially connected to form a second circulation system, and the second water pump 12 is used for driving the cooling liquid to flow in the second circulation system.
The first circulation system and the second circulation system exchange working medium and heat in the liquid storage unit 3.
The first circulation system is responsible for driving the cooling liquid in the first circulation system to flow through the external charging gun cooling pipe 22 to take away the heat of the charging gun, specifically, as shown in fig. 1, the water diversion unit 2 in the first circulation system is connected with the external charging gun, the cooled cooling liquid flows out of the liquid storage unit 3 and flows through the water diversion unit 2 under the driving of the first water pump 11, the water diversion unit 2 is connected with the external charging gun, the cooled cooling liquid further flows through the charging gun to cool the charging gun, the temperature of the cooling liquid flowing out of the charging gun rises, and the high-temperature cooling liquid returns to the liquid storage unit 3 again through the water diversion unit 2. The high-temperature cooling liquid returned to the liquid storage unit 3 enters the second circulation system for cooling.
The second circulation system is responsible for circulating cooling the cooling liquid in the liquid storage unit 3, specifically, as shown in fig. 1, under the driving of the second water pump 12, the cooling liquid flows out of the liquid storage unit 3, and the cooling liquid is cooled by the heat dissipation unit 4 and finally returns to the liquid storage unit 3. The cooled cooling liquid returned to the liquid storage unit 3 enters the first circulation system again, and the work of the first circulation system is repeated, so that the external charging gun is cooled.
The first circulation system separates the device that the water resistance is big in rifle that charges and the second circulation system, and the cooling liquid that is responsible for cooling the rifle that charges flows through the water resistance greatly reduced of first circulation system, has reduced the rifle that charges and has exploded the pipe and leak the risk in succession. In addition, originally, the cooling fluid of single circulation system flows through all devices, and the double circulation system distributes the devices in two circulation systems, so that the water resistance of each circulation is greatly reduced, and the reliability of the cooling device is higher. The double circulation is not interfered with each other, the water pump 1 can independently operate, the liquid storage unit 3 is used as a double circulation working medium exchange and heat exchange tool, a one-way valve and an electromagnetic valve are omitted, parts are reduced, the cost is reduced, and the reliability of the cooling device is higher.
In other embodiments, the arrangement order of the components in the first circulation system and the second circulation system may be different, and specifically, in the first circulation system, the arrangement order of the components along the flowing direction of the cooling liquid may be that the first water pump 11, the water diversion unit 2 and the liquid storage unit 3 are sequentially arranged; alternatively, the water dividing unit 2, the first water pump 11, and the liquid storage unit 3 are arranged in this order. In the second circulation system, the arrangement sequence of the components along the flowing direction of the cooling liquid may be that the second water pump 12, the heat radiating unit 4 and the liquid storage unit 3 are arranged in sequence; alternatively, the heat radiating unit 4, the second water pump 12, and the liquid storage unit 3 are arranged in this order.
It should be understood that the arrangement order of the respective components of the first circulation system and the arrangement order of the respective components of the second circulation system do not affect each other, that is, any arrangement order of the respective components of the first circulation system may be combined with any arrangement order of the respective components of the second circulation system, so long as the two circulation systems share one liquid storage unit 3.
In this embodiment, only the first circulation system and the second circulation system are adopted to form a dual circulation system, and in other embodiments, more circulation systems, such as a three-circulation system, a four-circulation system and other multiple circulation systems, can be adaptively added.
Further, the liquid storage unit 3 includes a first circulation water outlet 33, a first circulation water return 34, a second circulation water outlet 35, a second circulation water return 36, and a tank 31. As shown in fig. 2, one end of the first circulating water outlet 33 is connected to the first water pump 11, one end of the first circulating water return port 34 is connected to the water diversion unit 2, one end of the second circulating water outlet 35 is connected to the second water pump 12, one end of the second circulating water return port 36 is connected to the heat dissipation unit 4, and the other ends of the first circulating water outlet 33, the first circulating water return port 34, the second circulating water outlet 35 and the second circulating water return port 36 are all connected to the box 31.
In other embodiments, the first circulation water outlet 33 and the first circulation water return 34 may be different from each other in connection with other components of the first circulation system, specifically, one end of the first circulation water outlet 33 may be connected to the first water pump 11, and one end of the first circulation water return 34 may be connected to the water diversion unit 2; alternatively, one end of the first circulation water outlet 33 may be connected to the water dividing unit 2, and the first circulation water return 34 may be connected to the first water pump 11.
In other embodiments, the second circulation water outlet 35 and the second circulation water return port 36 may be different from each other in connection with other components of the second circulation system, specifically, one end of the second circulation water outlet 35 may be connected to the second water pump 12, and one end of the second circulation water return port 36 may be connected to the heat dissipation unit 4; alternatively, one end of the second circulation water outlet 35 may be connected to the heat radiating unit 4, and the second circulation water return 36 may be connected to the second water pump 12.
Further, the tank 31 includes a first circulation chamber 311, a second circulation chamber 312, a first water return passage 316, and a second water return passage 317;
as shown in fig. 2, the tank 31 has a common chamber 313 located outside the first circulation chamber 311 and the second circulation chamber 312, the first circulation chamber 311 and the second circulation chamber 312 are both communicated with the common chamber 313, two ends of the first water return path 316 are respectively communicated with the first circulation water return port 34 and the first circulation chamber 311, and the first circulation water outlet 33 is communicated with the first circulation chamber 311; two ends of the second water return channel 317 are respectively communicated with the second circulating water return port 36 and the second circulating chamber 312, and the second circulating water outlet 35 is communicated with the second circulating chamber 312.
In this embodiment, the case 31 is a regular quadrangular prism, the first circulation chamber 311 is a cuboid chamber formed by jointly splicing a partition plate and an inner wall of the case 31, the second circulation chamber 312 is also a cuboid chamber formed by jointly splicing a partition plate and an inner wall of the case 31, the first circulation chamber 311 and the second circulation chamber 312 are both arranged at the bottom of the case 31 and are respectively located at two diagonal positions of the case 31, a space is reserved between the first circulation chamber 311 and the second circulation chamber 312, and the length extension directions of the first circulation chamber 311 and the second circulation chamber 312 are parallel to each other and are parallel to one side edge of the bottom surface of the case 31. One end of the first circulation chamber 311 is provided with a circular opening 314 at a distance from the inner wall of the box 31, one end of the second circulation chamber 312 is provided with a circular opening 314 at a distance from the inner wall of the box 31, the circular opening 314 of the first circulation chamber 311 and the circular opening 314 of the second circulation chamber 312 are oriented differently, the diameter of the circular opening 314 is larger than the diameter of the first circulation water outlet 33 and the second circulation water outlet 35, and the edge length of the cuboid chamber exceeds the diameter of the circular opening 314 by more than 2 times. The first circulation chamber 311 and the second circulation chamber 312 are arranged at opposite angles at intervals, and the directions of the opened circular openings 314 are different, so that the design avoids that the high-temperature cooling liquid and the low-temperature cooling liquid in different chambers are mixed together too quickly, the heat transfer temperature difference between the cooling liquid entering the heat dissipation unit 4 from the box 31 and the air is low, and the cooling efficiency is reduced.
The purpose of the circular opening 314 having a larger diameter than the first and second circulation water outlets 33 and 35 is to prevent the circular opening 314 from having a smaller cross-sectional area than the cross-sectional area of the flow interface of the cooling liquid in the first and second circulation systems, and to avoid that the flow rate of the cooling liquid flowing into the common chamber 313 is too small, and the cooling liquid in the common chamber 313 cannot be sufficiently mixed. The allowance design of the sizes of the first circulation chamber 311 and the second circulation chamber 312 not only does not affect the water supplement and pressure stabilization of the water pump 1, but also minimizes the water resistance generated by the first circulation chamber 311 and the second circulation chamber 312. Under the condition that the external temperature is lower, the second circulation system is not needed to cool the cooling liquid when the charging is just started, only the first circulation system is operated, the cooling liquid flowing into the first circulation chamber 311 from the first circulation water return port 34 can be fully mixed with the existing cooling liquid in the box body 31 through the circular opening 314, the cold accumulation effect can be achieved through the design, and the severe fluctuation of the water temperature is avoided.
The first water return channel 316 and the second water return channel 317 can be 2 hoses, the upper part of the tank body 31 is air, the lower part is cooling liquid, after the first water return channel 316 and the second water return channel 317 are additionally arranged, the cooling liquid flowing out of the first circulating water return port 34 and the second circulating water return port 36 can enter the liquid level of the cooling liquid of the tank body 31, so that bubbles generated by the impact of the liquid and the air are avoided, and cavitation of the water pump 1 by the bubbles is avoided.
It should be appreciated that in other embodiments, the first circulation chamber 311 and the second circulation chamber 312 may be formed not only in a rectangular parallelepiped shape, but also in a sphere or other cavity having a shape that blocks the diffusion of the cooling liquid around. The first circulation chamber 311 and the second circulation chamber 312 may be directly connected to the common chamber 313 through an organic film or a ceramic film, or may be connected to the common chamber 313 through a liquid switching valve, so long as the flow rate of the cooling liquid when the first circulation chamber 311 and the second circulation chamber 312 are connected to the common chamber 313 is ensured to be greater than the flow rate of the cooling liquid when the cooling liquid is exchanged between the first circulation system and the second circulation system, and the connection modes of the first circulation chamber 311 and the second circulation chamber 312 to the common chamber 313 may be different according to the temperature or other properties of the cooling liquid entering the first circulation chamber 311 and the second circulation chamber 312. The first water return passage 316 and the second water return passage 317 are not limited to passages of different materials such as hoses and hard tubes, and may be passages having good sealing properties.
In the present embodiment, specifically, the circulation process of the cooling liquid in the tank 31 by the first circulation system is as follows: the cooling liquid flowing out of the first circulating water return port 34 directly enters the first circulating chamber 311 through the first water return passage 316, a circular opening 314 is formed in the first circulating chamber 311 to exchange working medium with the cooling liquid outside the first circulating chamber 311, and after the first water pump 11 of the first circulating system is started, the cooling liquid in the first circulating chamber 311 can be driven to flow into the first circulating water outlet 33, so that the cooling liquid in the first circulating chamber 311 enters the first circulating system to work. Because the cooling liquid flowing out of the first circulation water return port 34 is the cooling liquid cooled by the second circulation system, the temperature of the cooling liquid entering the first circulation chamber 311 is low, the cooling liquid in the first circulation chamber 311 and the existing cooling liquid in the box 31 are slowly mixed through the circular opening 314 on the first circulation chamber 311, and thus the mixing degree of the cooling liquid cooled by the second circulation system and the existing cooling liquid in the box 31 can be reduced. Meanwhile, the design that the cooling liquid in the first circulation chamber 311 can be directly driven to flow into the first circulation water outlet 33 shortens the distance from the cooled cooling liquid to the first circulation water outlet 33, avoids the temperature rise of the cooled cooling liquid in the mixing and conveying processes, and further improves the cooling efficiency of the charging gun.
The second circulation system circulates the coolant in the tank 31 as follows: the cooling liquid flowing out of the second circulation water return port 36 directly enters the second circulation chamber 312 through the second water return channel 317, only one circular opening 314 in the second circulation chamber 312 exchanges working medium with the cooling liquid outside the second circulation chamber 312, and after the water pump 1 of the second circulation system is started, the cooling liquid in the second circulation chamber 312 can be driven to flow into the second circulation system. The cooling liquid entering the second circulation chamber 312 is the high-temperature cooling liquid flowing back after passing through the first circulation system, the temperature of the cooling liquid outside the second circulation chamber 312 is low, the high-temperature cooling liquid in the second circulation chamber 312 and the existing cooling liquid in the box 31 are slowly mixed through the circular opening 314, and thus the mixing degree of the high-temperature cooling liquid flowing back into the box 31 and the existing cooling liquid in the box 31 can be reduced. After the second water pump 12 is started, the cooling liquid in the second circulation chamber 312 can directly flow into the second circulation water outlet 35, and the cooling liquid enters the second circulation system through the second circulation water outlet 35 to cool down, because the mixing degree of the high-temperature cooling liquid in the second circulation chamber 312 and the existing cooling liquid is low, the temperature difference between the cooling liquid and the surrounding air is large when the cooling liquid flows through the second circulation system, the heat dissipation efficiency of the heat dissipation unit 4 is improved due to the high heat transfer temperature difference, the cooling efficiency of the cooling liquid is faster, and the cooling efficiency of the charging gun is further improved.
Further, as shown in fig. 2, the tank 31 further includes a filling port 315 and a liquid level system 32.
The liquid adding opening 315 is arranged on the surface of the box body 31, and the liquid adding opening 315 is used for being connected with a device for adding cooling liquid so as to supplement the cooling liquid into the box body 31. The liquid level system 32 comprises a liquid level sensor and an early warning component, wherein a detection site of the liquid level sensor is positioned at the lowest liquid level of preset liquid of the box 31; the early warning assembly is connected with the liquid level sensor.
In other embodiments, in particular, the filling port 315 may be provided with a filling port cover that can be freely detached, and the filling port cover may be a ventilation valve that is in communication with the atmosphere, or may be a plug that is completely sealed from the atmosphere. When the added cooling liquid is not easy to evaporate, the ventilation valve can be selected as a liquid filling port cover, when the temperature of the cooling liquid flowing into the box body 31 is too high, the air pressure of the box body 31 is increased, when the ventilation valve is selected as the liquid filling port cover, air above the box body 31 can be discharged into the atmosphere through the ventilation valve, and when the temperature of the cooling liquid in the box body 31 is reduced, the air enters the box body 31 through the ventilation valve, so that the problem that the air pressure in the box body 31 is unstable due to the large temperature change in the box body 31 is solved. However, when the easily-evaporated cooling liquid such as the electronic fluoridation liquid is selected, a plug type liquid filling cover is needed, the plug is only opened when the cooling liquid is added, the liquid filling opening 315 is connected with equipment for adding the cooling liquid, the liquid filling opening 315 is plugged by the plug after the addition is finished, and otherwise, the easily-evaporated cooling liquid is evaporated quickly.
The liquid level sensor can be a contact type or a non-contact type liquid level sensor and the like, can be selected according to the type of the used cooling liquid, presets the highest liquid level and the lowest liquid level of the cooling liquid in the box body 31, when the cooling liquid in the box body 31 is lower than the lowest liquid level or higher than the highest liquid level, the liquid level sensor outputs a liquid level signal, the early warning component receives the liquid level signal and outputs a prompt tone, and in other embodiments, the early warning component can be connected with the display screen to output liquid level information. The liquid level system 32 and the liquid filling port 315 can ensure that a constant range of cooling liquid exists in the tank 31, namely, the highest liquid level of the cooling liquid is lower than the heights of the first circulating water return port 34 and the second circulating water return port 36, and the lowest liquid level of the cooling liquid is higher than the heights of the first circulating water outlet 34 and the second circulating water outlet 36, so that the influence of too little or too much cooling liquid on the circulation of the cooling liquid of the cooling device is avoided.
Further, the connection between the first water return channel 316 and the first circulation chamber 311 is not higher than the preset lowest liquid level of the tank 31, the connection between the second water return channel 317 and the second circulation chamber 312 is not higher than the preset lowest liquid level of the tank 31, the highest point of the first circulation chamber 311 and the second circulation chamber 312 at the connection with the common chamber 313 is lower than the preset lowest liquid level of the tank 31, and the lowest point of the first circulation chamber 311 and the second circulation chamber 312 at the connection with the common chamber 313 is not lower than the bottom of the tank 31.
As shown in fig. 3, in this embodiment, the first circulation chamber 311 and the second circulation chamber 312 are both in a cuboid shape, the top of the first circulation chamber 311 is connected to the first water return path 316 through a pagoda joint, the top of the second circulation chamber 312 is connected to the second water return path 317 through a pagoda joint, the connection positions of all the pagoda joints are not higher than the lowest liquid level of the preset liquid of the tank 31, the highest point of the connection positions of the first circulation chamber 311 and the second circulation chamber 312 with the common chamber 313 is lower than the lowest liquid level preset by the tank 31, and thus, gas cannot enter the first circulation chamber 311 and the second circulation chamber 312, bubbles cannot be generated in the operation process of the first circulation system and the second circulation system, the normal operation of the first circulation system and the second circulation system is ensured, and the operation risk of the double circulation cooling device is reduced.
Further, as shown in fig. 1, the dual-circulation cooling device of the charging gun further comprises a filtering unit 5, wherein one end of the filtering unit 5 is connected to the heat dissipation unit 4, and the other end is connected to the first circulation water return port 34.
In the present embodiment, specifically, the filter unit 5 selects a Y-filter that is installed near the return water port and above the highest liquid level. The inside of the filter is air, and the cooling liquid is influenced by gravity to flow into the box 31, so that the cooling liquid is in open circulation, closed circulation or closed circulation completely isolated from the atmosphere, and when the impurities are too much, the filter can be directly replaced when the filter is required to be replaced or the filter screen in the filter is required to be replaced, the cooling liquid is not required to be emptied, and the leakage of the cooling liquid is not required to be worried.
In other embodiments, the filter unit 5 may also select a straight-through pipe filter, a T-pipe filter, a duplex switching filter, or other filters with pipe filtering function.
Further, as shown in fig. 3, the height of the first circulation water outlet 33 is higher than that of the second circulation water outlet, and the second circulation water outlet 35 is flush with the bottom of the tank 31.
The first circulation system is connected with the charging gun, the charging gun and a cable thereof are subjected to severe service environments such as dragging, bending, rolling of vehicles and the like in actual use, meanwhile, the cross section area of the charging gun cable is usually smaller, and if impurity particles entering the first circulation system are too large, the charging gun cable can be blocked and the like. Therefore, the height of the first circulating water outlet 33 is higher than that of the second circulating water outlet 35, and the second circulating water outlet 35 is arranged at the lowest position of the box body 31, so that impurities generated in the circulation of the cooling liquid can be led to the second circulating system, and the first circulating system is indirectly protected.
Further, the water diversion unit 2 comprises a water diversion device 21 and a charging gun cooling pipe 22;
as shown in fig. 1, the water separator 21 includes a water separator water outlet 212 and a water separator water return port 211, and the charging gun cooling pipe 22 includes a charging gun liquid outlet 221 and a charging gun liquid return port 222. One end of the water separator water outlet 212 is connected with the liquid storage unit 3, and the other end is connected with the charging gun liquid outlet 221; one end of the water return port 211 of the water separator is connected to the first water pump 11, and the other end is connected to the liquid return port 222 of the charging gun.
The first water pump 11 is started, the cooling liquid sequentially flows through the first circulating water outlet 33, the water separator water outlet 212, the charging gun liquid outlet 221, the charging gun liquid return port 222, the water separator water return port 211 and the liquid storage unit 3, and the water separator 21 is independently connected with the charging gun cooling pipe 22, so that the water resistance of a circulating system is greatly reduced, and the risk of pipe explosion and leakage of the charging gun is reduced.
Further, the dual-cycle cooling device of the charging gun further comprises a temperature sensor and a control unit, wherein the temperature sensor is installed in each of the liquid storage unit 3, the water return port 211 of the water separator and the heat dissipation unit 4, and the control unit is connected to the temperature sensor.
In other embodiments, a temperature sensor also connected to the control unit may be installed at the water knockout drum water outlet 211, the second circulation water return 36 and the second circulation water outlet 35 for fault detection of the dual circulation cooling device.
Further, as shown in fig. 1, the heat dissipating unit 4 includes a fan 41 and a radiator 42, one end of the radiator 42 is connected to the liquid storage unit 3, and the other end is connected to the second water pump 12, and the fan 41 is used for driving the outside air to pass through the radiator 42. In other embodiments, heat dissipation methods such as water cooling may be used in addition to air cooling.
Further, the cooling liquid can be water, glycol solution, silicone oil, electronic fluoridation liquid.
The invention also provides a double-circulation cooling method of the charging gun, which comprises the following steps of:
when the cooling liquid used by the double-circulation cooling device of the charging gun is low-viscosity cooling liquid, such as electronic fluoridation liquid and glycol water solution:
when the charging gun starts to work, the first circulation system is started, after a preset time period is operated, when T2 is more than N1 and T2 is more than T1, the second circulation system starts to work, and the heat radiating unit 4 is started;
when the charging gun stops working and T2 is less than N1, the first circulation system stops working; when the delta T is more than or equal to 3 ℃, the second circulation system still operates according to a preset program, and the larger the delta T is, the larger the power of the second circulation system is; when delta T is less than adeg.C, the second circulation system is closed;
when the cooling liquid used by the double-circulation cooling device of the charging gun is high-viscosity cooling liquid such as silicone oil:
when the charging gun starts to work, the first circulation system is started, after a preset time period is operated, when T2 is more than N2 and T2 is more than T1, the second circulation system starts to work, and the heat dissipation unit 4 starts to dissipate heat;
whether the charging gun works or not, when the delta T is more than or equal to a ℃ and the T1 is more than N2, the second circulation system operates according to a preset program, and the larger the delta T is, the larger the power of the second circulation system is; when delta T is less than 3 ℃, the second circulation system is closed; when T1 is less than N2, the first water pump 11 is intermittently started to generate heat, so that N2-b ℃ is less than T1 and less than N2 plus b ℃;
t1 is the temperature of the cooling liquid in the liquid storage unit 3;
t2 is the temperature of the cooling liquid flowing through the water return port 211 of the water separator;
t6 is the temperature of the air outside the heat dissipation unit 4;
n1 is a set temperature, and is a critical temperature when the heat dissipation unit 4 is started to dissipate heat;
n2 is the optimal working temperature of the cooling liquid, is the target working temperature when the heat dissipation unit 4 is started to dissipate heat, and N2 is matched through test measurement and cannot be changed at will;
Δt is the difference between the temperature of the cooling liquid in the liquid storage unit 3 and the temperature of the air outside the heat radiation unit 4, Δt=t1 to T6;
a is the contrast temperature of delta T, and the matching is tested by a test;
b is the fluctuation value of the optimal working temperature of the cooling liquid, and is set according to different cooling liquids.
In this embodiment, when the charging gun starts to operate, the logic determination for T1/T2/T6 starts when the predetermined period of time for which the first circulation system operates after the start is 5-10 s. Wherein T1 is specifically the temperature of the cooling liquid in the common chamber 313, and T6 is the temperature of the air inlet of the fan 41 in the heat dissipating unit 4. Delta t=t1 to T6 is the difference between the temperature of the cooling liquid in the common chamber 313 and the temperature of the air inlet of the fan 41, when delta T is greater than or equal to 3 ℃, the temperature difference between the cooling liquid to be cooled in the common chamber 313 and the air around the radiator 42 is too large, at this time, the second circulation system should be started to cool the cooling liquid, so as to improve the cooling efficiency of the dual-circulation cooling device of the charging gun, and in other embodiments, the optimal temperature range of 2 to 3 ℃ is the optimal temperature range of a, and specific numerical values are determined according to multiple tests of different cooling liquids used.
In this embodiment, the electronic fluorinated liquid and the ethylene glycol aqueous solution are low-viscosity cooling liquids whose dynamic viscosity is slow with temperature change, and the silicone oil is low-viscosity cooling liquid whose dynamic viscosity is large with temperature change, so when the silicone oil is used as the cooling liquid, the silicone oil is kept to work at the optimum working temperature N2, so that the low circulation efficiency of the silicone oil in the circulation system is avoided, specifically, the silicone oil temperature in the liquid storage unit 3 fluctuates in the range of N2±b ℃, b=5 ℃, i.e., N2±5 ℃. When the external temperature is lower, high-viscosity cooling liquid such as silicone oil needs to be heated to the optimal working temperature, only one circulation loop is arranged in the single-circulation cooling system, the cooling liquid inevitably flows through the heat radiating unit, so that the temperature rising speed of the cooling liquid is reduced or can not rise to the optimal working temperature.
In other embodiments, T3/T4/T5 may be detected, and when the second circulation system is turned on for a period of time, if T4 is greater than T6, T5 is greater than T6, and the difference between T4 and T5 is very small, it may be determined that the heat dissipating unit 4 fails, and the fan 41 may be damaged or the heat dissipating unit 4 may not be able to cool the liquid effectively due to dust accumulation on the heat dissipating unit 42. T3 is the temperature of the cooling liquid at the water outlet 211 of the water separator, T4 is the temperature of the cooling liquid at the second circulating water return port 36, and T5 is the temperature of the cooling liquid at the second circulating water outlet 35.
The foregoing description of the preferred embodiments of the invention is not intended to be limiting, but rather is intended to cover all modifications, equivalents, and alternatives falling within the spirit and principles of the invention.
Claims (10)
1. The double-circulation cooling device of the charging gun comprises a water pump, a water diversion unit, a liquid storage unit and a heat dissipation unit, and is characterized in that,
the water pump comprises a first water pump and a second water pump;
the first water pump, the water diversion unit and the liquid storage unit are sequentially connected to form a first circulation system, the liquid storage unit is used for storing cooling liquid, and the first water pump is used for driving the cooling liquid to flow in the first circulation system;
the second water pump, the heat radiating unit and the liquid storage unit are sequentially connected to form a second circulating system, and the second water pump is used for driving the cooling liquid to flow in the second circulating system;
the first circulation system and the second circulation system exchange working medium and heat in the liquid storage unit.
2. The dual-circulation cooling device of the charging gun according to claim 1, wherein the liquid storage unit comprises a box body, a first circulation water outlet, a first circulation water return port, a second circulation water outlet and a second circulation water return port, and the other ends of the first circulation water outlet, the first circulation water return port, the second circulation water outlet and the second circulation water return port are all connected with the box body;
one end of the first circulating water outlet is connected with the first water pump;
one end of the first circulating water return port is connected with the water diversion unit;
one end of the second circulating water outlet is connected with the second water pump;
one end of the second circulating water return port is connected with the heat radiating unit.
3. The dual cycle cooling device of a charge gun of claim 2, wherein the housing includes a first cycle chamber, a second cycle chamber, a first water return passage, and a second water return passage;
the box body is provided with a shared chamber outside the first circulating chamber and the second circulating chamber, and the first circulating chamber and the second circulating chamber are communicated with the shared chamber;
the two ends of the first water return passage are respectively communicated with the first circulating water return port and the first circulating chamber, and the first circulating water outlet is communicated with the first circulating chamber; the two ends of the second water return passage are respectively communicated with the second circulating water return port and the second circulating chamber, and the second circulating water outlet is communicated with the second circulating chamber.
4. A dual cycle cooling device of a charging gun according to claim 3, wherein the junction of the first water return passage and the first cycle chamber is not higher than the preset minimum liquid level of the tank, the junction of the second water return passage and the second cycle chamber is not higher than the preset minimum liquid level of the tank, and the highest point of the junction of the first cycle chamber and the second cycle chamber and the common chamber is lower than the preset minimum liquid level of the tank.
5. The dual cycle cooling device of a charging gun of claim 2, wherein the tank further comprises a liquid filling port and a liquid level system;
the liquid adding port is arranged on the surface of the box body and is used for being connected with a device for adding cooling liquid so as to supplement the cooling liquid into the box body by the device;
the liquid level system comprises a liquid level sensor and an early warning assembly, wherein a detection site of the liquid level sensor is positioned at the lowest liquid level of preset liquid of the box body; the early warning component is connected with the liquid level sensor.
6. The dual cycle cooling device of a charging gun according to claim 2, further comprising a filter unit, wherein one end of the filter unit is connected to the heat dissipation unit, and the other end is connected to the first water recycling port.
7. The dual cycle cooling device of a charging gun of claim 2, wherein the first cycle water outlet is higher than the second cycle water outlet, and the second cycle water outlet is flush with the bottom of the tank.
8. The dual cycle cooling device of a charging gun according to claim 1, wherein the water diversion unit comprises a water diversion device and a charging gun cooling tube;
the water separator comprises a water separator water outlet and a water separator water return port;
the charging gun cooling pipe comprises a charging gun liquid outlet and a charging gun liquid return port;
one end of the water outlet of the water separator is connected with the liquid storage unit, and the other end of the water outlet of the water separator is connected with the liquid outlet of the charging gun; one end of the water return port of the water separator is connected with the first water pump, and the other end of the water return port of the water separator is connected with the liquid return port of the charging gun.
9. The dual cycle cooling device of a charging gun according to claim 8, further comprising a temperature sensor and a control unit, wherein the temperature sensor is installed in the liquid storage unit, the water return port of the water separator and the heat dissipation unit, and the control unit is connected to the temperature sensor.
10. A method for cooling a charging gun in a double circulation manner, which is characterized by being used for the charging gun double circulation cooling device in claim 8; the double-circulation cooling method of the charging gun comprises the following steps:
when the cooling liquid used by the charge gun double-circulation cooling device is low-viscosity cooling liquid:
when the charging gun starts to work, the first circulation system is started, after a preset time period is operated, when T2 is more than N1 and T2 is more than T1, the second circulation system starts to work, and the heat radiating unit is started;
when the charging gun stops working and T2 is less than N1, the first circulation system stops working; when the delta T is more than or equal to a ℃, the second circulation system still operates according to a preset program, and the larger the delta T is, the larger the power of the second circulation system is; when delta T is less than adeg.C, the second circulation system is closed;
when the cooling liquid used by the charge gun double-circulation cooling device is high-viscosity cooling liquid:
when the charging gun starts to work, the first circulation system is started, after a preset time period is operated, when T2 is more than N2 and T2 is more than T1, the second circulation system starts to work, and the heat dissipation unit starts to dissipate heat;
whether the charging gun works or not, when the delta T is more than or equal to a ℃ and the T1 is more than N2, the second circulation system operates according to a preset program, and the larger the delta T is, the larger the power of the second circulation system is; when delta T is less than adeg.C, the second circulation system is closed; when T1 is less than N2, the first water pump is intermittently started to generate heat, so that N2-bdeg.C is less than T1 and less than N2+bdeg.C;
t1 is the temperature of the cooling liquid in the liquid storage unit;
t2 is the temperature of the cooling liquid flowing through the water return port of the water separator;
t6 is the temperature of the air outside the heat radiating unit;
n1 is a set temperature, and is a critical temperature when the heat radiating unit is started to radiate heat;
n2 is the optimal working temperature of the cooling liquid, is the target working temperature when the heat dissipation unit is started to dissipate heat, and N2 is matched through test measurement and cannot be changed at will;
Δt is the difference between the temperature of the cooling liquid in the liquid storage unit and the temperature of the air outside the heat dissipation unit, and Δt=t1 to T6;
a is the contrast temperature of delta T, and the matching is tested by a test;
b is the fluctuation value of the optimal working temperature of the cooling liquid, and is set according to different cooling liquids.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310582144.1A CN116614999A (en) | 2023-05-22 | 2023-05-22 | Dual-circulation cooling device and cooling method for charging gun |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310582144.1A CN116614999A (en) | 2023-05-22 | 2023-05-22 | Dual-circulation cooling device and cooling method for charging gun |
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| CN116614999A true CN116614999A (en) | 2023-08-18 |
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| CN202310582144.1A Pending CN116614999A (en) | 2023-05-22 | 2023-05-22 | Dual-circulation cooling device and cooling method for charging gun |
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| Country | Link |
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| CN (1) | CN116614999A (en) |
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- 2023-05-22 CN CN202310582144.1A patent/CN116614999A/en active Pending
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