CN101470451B - Cooling system used for electric power apparatus and its control method - Google Patents
Cooling system used for electric power apparatus and its control method Download PDFInfo
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- CN101470451B CN101470451B CN2007103078385A CN200710307838A CN101470451B CN 101470451 B CN101470451 B CN 101470451B CN 2007103078385 A CN2007103078385 A CN 2007103078385A CN 200710307838 A CN200710307838 A CN 200710307838A CN 101470451 B CN101470451 B CN 101470451B
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Abstract
A cooling system for electric devices comprises a water tank (6), a water pump (1), at least one temperature sensor (15) and a controller (16), and the water tank (6) is provided with a liquid outlet and a liquid inlet, wherein the cooling system further comprises an external environmental temperature sensor (13) which is electrically connected with an input end of the controller (16) to detect temperature of the external environment, the controller (16) controls the rotary speed of the water pump (1) through the temperature values detected by the external environmental temperature sensor (13) and at least one temperature sensor (15). Further, the controller (16) can realize real-time monitoring for the overall cooling system and can perform self-adaptive adjustment on working state of the cooling system according the external environment temperature in any situation, thereby significantly reducing energy consumption in the cooling system. Besides, the invention further provides a control method of the cooling system for electric devices.
Description
Technical field
The present invention relates to a kind of cooling system and control method thereof, more particularly, relate to a kind of cooling system and control method thereof that electric device is lowered the temperature of being used for.
Background technology
Cooling system is an indispensable ingredient in the electric device; For example; In vehicle, it is overheated to prevent device that cooling system is used to regulate the temperature of devices such as the engine, motor, AC/DC convertor of vehicle, thereby guarantee the reliability and the security of vehicle '.
The automobile cooling system to motor car engine and the cooling of automotive wheels wheel among existing cooling system such as the CN2649395Y has proposed to control through temperature the running of cooling package.This cooling system comprises other cooling packages and controllers such as at least one temperature sensing device, water tank, water pump and fan; Wherein temperature sensing device is used to detect the temperature at vehicle wheel wheel place; And detected said temperature is input in the controller, controller is controlled water pump and fan according to this temperature.But this cooling system can not carry out self-adaptation according to ambient temperature to be regulated.Like this; When ambient temperature was very high, existing cooling system often can not provide enough cooling effects, thereby caused too high reliability and the security that jeopardizes vehicle of local temperature; In addition; When ambient temperature was very low, existing cooling system is work as usual but, thereby caused very severe energy waste.
Summary of the invention
In order to overcome existing cooling system problem that exist and that can not regulate duty according to ambient temperature adaptively,, the present invention can regulate cooling system and the control method thereof that duty effectively improves cooling effectiveness adaptively according to ambient temperature thereby providing a kind of.
The present invention provides a kind of cooling system that is used for electric device; Comprise water tank, water pump, at least one temperature sensor and controller, said water tank has liquid outlet and liquid inlet, links to each other through pipeline between the liquid outlet of said water tank and the water pump; At least one temperature sensor is electrically connected with the input end of controller; The output terminal of controller is electrically connected with water pump, and water pump is used for regulating the flow velocity of the liquid coolant of cooling system, and at least one temperature sensor is used to detect the cooling system internal temperature; And detected temperature sent to controller; Wherein, said cooling system also comprises the ambient temperature sensor, and this ambient temperature sensor is electrically connected with the input end of said controller to be used to detect ambient temperature; And detected temperature sent to controller, controller is used for controlling according to ambient temperature sensor and the detected temperature value of at least one temperature sensor the rotating speed of water pump.
The present invention also provides a kind of control method that is used for the cooling system of electric device, and wherein, said control method may further comprise the steps: detect ambient temperature and said cooling system internal temperature; Confirm to make the dutycycle of water pump operation according to detected ambient temperature and said cooling system internal temperature in the control signal of optimum speed; Generation has the control signal of this dutycycle and passes through the rotating speed of this signal controlling water pump.
Cooling system provided by the invention can in time obtain the detected cooling system temperature inside of at least one temperature sensor in ambient temperature and the system through controller; The temperature that detects through this multiple spot is the temperature regime of reaction cooled internal system and external environment condition more exactly; And pass through said temperature and its threshold separately; Confirm the pairing temperature range of said temperature; Thereby find pairing dutycycle and the final rotating speed of regulating water pump through control signal that makes water pump operation in the control signal of optimum speed in this interval with this dutycycle; This shows; Can realize real-time monitoring through controller, and all can carry out the self-adaptation adjusting to the duty of cooling system under the situation arbitrarily, thereby improve the cooling effect of said cooling system according to ambient temperature to whole cooling system.In addition, the cooling system that is used for electric device provided by the present invention has only increased the ambient temperature sensor on the basis of traditional cooling system, and the number of devices of being added is less, thereby helps the stable operation of system.
Description of drawings
Fig. 1 is the structural representation that is used for the cooling system of electric device provided by the invention;
Fig. 2 is the structural representation of the circuit control section of the cooling system that is used for electric device of a preferred embodiment of the invention;
Fig. 3 is applied to the synoptic diagram that is electrically connected of electric device cooling for the cooling system that is used for electric device with a preferred embodiment of the invention;
Fig. 4 is the process flow diagram of the control method of the cooling system that is used for electric device of a preferred embodiment of the invention.
Embodiment
As shown in Figure 1; The present invention provides a kind of cooling system that is used for electric device; Comprise water tank 6, water pump 1, at least one temperature sensor 15 and controller 16, said water tank 6 has liquid outlet and liquid inlet, links to each other through pipeline 17 between the liquid outlet of said water tank 6 and the water pump 1; At least one temperature sensor 15 is electrically connected with the input end of controller 16; The output terminal of controller 16 is electrically connected with water pump 1, and water pump 1 is used for regulating the flow velocity of the liquid coolant of cooling system, and at least one temperature sensor 15 is used to detect the cooling system internal temperature; And detected temperature sent to controller 16; Wherein, said cooling system also comprises ambient temperature sensor 13, and this ambient temperature sensor 13 is electrically connected to be used to detect ambient temperature with the input end of said controller 16; And detected temperature sent to controller 16, controller 16 is used for controlling according to ambient temperature sensor 13 and at least one temperature sensor 15 detected temperature value the rotating speed of water pump 1.
Said water tank 6 is used for containing a year liquid coolant, can for ease of daily servicing, be preferably the water tank that adopts the water tank main body with separable tank lid for having the closed container of water tank main body, liquid inlet and liquid outlet arbitrarily.Said water pump 1 is used for controlling the flow velocity of the liquid coolant of cooling system, thereby the control cooling system is to the cooling intensity of each power device that need lower the temperature.Said water pump 1 can be a water pump arbitrarily, when said cooling system is applied to vehicle, is preferably the employing centrifugal pump.Said pipeline 17 can be for having any pipeline of diversion function.
Said at least one temperature sensor 15 and ambient temperature sensor 13 can be temperature sensor arbitrarily; At least one temperature sensor 15 is used to detect the cooling system temperature inside, and ambient temperature sensor 13 is used to detect the temperature of external environment.This at least one temperature sensor 15 can comprise second temperature sensor 8 that is used to detect first temperature sensor 7 of the inner maximum temperature of cooling system and/or is used to detect the inner minimum temperature of cooling system; A preferred embodiment of the invention; As shown in Figure 3; In order to make detected temperature value can reflect cooling system temperature inside situation more accurately, this at least one temperature sensor 15 is preferably and comprises first temperature sensor 7 and second temperature sensor 8 that is positioned at the water tank liquid outlet that is positioned at the water tank liquid inlet.As known in those skilled in the art; When liquid coolant when each electric device that need be lowered the temperature and final of flowing through flows into the liquid inlet of water tank 6, the temperature of liquid coolant reaches mxm., therefore; It is generally acknowledged that the temperature at the liquid inlet place of water tank 6 represented the maximum temperature in the whole cooling system; And the temperature of the liquid coolant of the liquid outlet of from water tank 6, flowing through is minimum, therefore, it is generally acknowledged that the temperature at the liquid outlet place of water tank 6 has been represented the minimum temperature in the whole cooling system.This shows, be installed on first temperature sensor 7 of above-mentioned position and temperature that second temperature sensor 8 is collected and can represent maximum temperature and minimum temperature in the said cooling system respectively.In addition, ambient temperature sensor 13 is placed in the external environment so that gather the temperature value of external environment in real time.
Said controller 16 can be commercially available for having the control element of numerical value comparing function arbitrarily, also can be with the realization of simply programming of single-chip microcomputer, computing machine, vehicle electronic control unit.As shown in Figure 2; In order more effectively to control the rotating speed of water pump 1; A preferred embodiment of the invention; Said controller 16 comprises microprocessor 11, signal generator 10 and the signal amplifier 9 of series connection successively, and the output terminal of signal amplifier 9 is electrically connected with water pump 1, and the input end of microprocessor 11 is electrically connected with ambient temperature sensor 13 with at least one temperature sensor 15 respectively.Microprocessor 11 is used for the actual temperature value according at least one temperature sensor 15 that receives and 13 detections of ambient temperature sensor; The temperature range that finds this actual temperature value to fall into; And search out corresponding with this temperature range dutycycle that makes the control signal of the optimum speed that water pump 1 runs on water pump 1; Signal generator 10 is used to generate the control signal with the specified dutycycle of microprocessor 11, and signal amplifier 9 is used for this control signal is amplified the rotating speed with control water pump 1.A preferred embodiment of the invention, said microprocessor 11 are electrically connected with first temperature sensor 7 and second temperature sensor 8 respectively.
As shown in Figure 2; Said microprocessor 11 comprises the comparison means 18 and mapping device 19 that is one another in series; The input end of comparison means 18 also is electrically connected with ambient temperature sensor 13 with at least one temperature sensor 15 respectively, and the output terminal of mapping device 19 also is electrically connected with signal generator 10.Comparison means 18 is used for the actual temperature value that at least one temperature sensor 15 and ambient temperature sensor 13 are detected is compared with its predetermined temperature threshold separately; And the temperature range that finds said actual temperature value thus and fallen into; Mapping relations between the dutycycle of the control signal when presetting ambient temperature and/or cooling system internal temperature and water pump 1 in the mapping device 19 and running on optimum speed, these mapping relations are used for confirming concerning one to one between the dutycycle of said temperature range and said control signal when making water pump 1 run on optimum speed.According to an embodiment of the invention; Said comparison means 18 comprises first comparer 20, second comparer 21 and the 3rd comparer 22; Be respectively applied for first temperature sensor 7, second temperature sensor 8 and ambient temperature sensor 13 detected temperature values are compared with its predetermined temperature threshold separately; Thereby confirm the pairing temperature range of detected temperature value; And from mapping device 19, seek corresponding mapping relations according to this temperature range; Thereby obtain the dutycycle that control water pump 1 runs on the control signal of optimum speed, and control-signals generator 10 produces the control signal with this dutycycle, and the said control signal after amplifying through signal amplifier 9 comes final control water pump 1 to run on optimum speed.
Mapping relations in the said mapping device 19 can be preset in the mapping device 19 through computing machine 12; So that mapping device 19 is regulated the rotating speed of water pump 1 in view of the above; Pulse-length modulation (PWM) technology of wherein, recently regulating motor speed through the duty that changes control signal is for conventionally known to one of skill in the art.Mapping relations in the mapping device 19 can be demarcated through lot of test; For example, if the optimum working temperature of cooling system is about 40 ℃, working as ambient temperature so is 20-25 ℃; The maximum temperature of internal system is 60 ℃; When minimum temperature is 30 ℃,, can search out the tachometer value that makes the water pump 1 of internal system temperature stabilization about 40 ℃ through test; Wherein, The optimum working temperature of said cooling system can be for by the optimum working temperature of the electric device that this cooling system cooled off, and when this electric device that is cooled when being a plurality of, can choose temperature value is minimum in the optimum working temperature of these a plurality of electric devices that temperature optimum working temperature as system.Certainly, the rotating speed combination of satisfying the water pump 1 of above-mentioned condition has multiple, but through actual test, can find wherein one group of tachometer value of power saving the most, is optimum speed.
The pulse signal that is used for PWM is produced by signal generator 10, and said signal generator 10 is used under the control of microprocessor 11, producing the control signal with given dutycycle, and this signal generator 10 can be for producing the signal generator of pulse signal arbitrarily.
Said signal amplifier 9 is used for the control signal that signal generator 10 produces is amplified, so that the control signal after this amplification can be controlled the motor speed of said water pump 1.Said signal amplifier 9 can adopt any one circuit with voltage amplification function or device, for example, and the amplifier that can adopt integrated operational amplifier or constitute by special transistor device.For the stability of system and realize easy, be preferably the partial pressure types biasing common emitter amplifying circuits control water pumps 1 that adopt two to constitute by igbt (IGBT).The principle of work of partial pressure type biasing common emitter amplifying circuit is conventionally known to one of skill in the art, repeats no more at this.
Between the dutycycle of said temperature range and the control signal when making water pump 1 run on optimum speed one to one the method for building up of relation comprise: set and be used to divide the first temperature threshold S1 and the second temperature threshold S2 corresponding to the temperature range of first temperature sensor, 7 detected temperature; The first temperature threshold S1 is that the second temperature threshold S2 is the 120%-150% of the optimum working temperature of cooling system in the scope of optimum working temperature ± 5% of cooling system; Setting is used to divide the 3rd temperature threshold S3, the 4th temperature threshold S4 and the 5th temperature threshold S5 corresponding to the temperature range of second temperature sensor, 8 detected temperature; 80% of the optimum working temperature of 50%≤S3 of the optimum working temperature of cooling system≤cooling system; 95% of the optimum working temperature of 80%＜S4 of the optimum working temperature of cooling system＜cooling system, 105% of the optimum working temperature of 95%≤S5 of the optimum working temperature of cooling system≤cooling system; Setting is used to divide the ambient temperature threshold value S6 corresponding to the temperature range of the ambient temperature of ambient temperature sensor 13, and said ambient temperature threshold value S6 is 3-8 degree centigrade a plurality of values of being spaced apart in-15-45 degree centigrade scope; Set three temperature ranges that different S1 and S2 divide, four temperature ranges that S3, S4 and S5 divided, the pairing dutycycle that makes water pump 1 run on the control signal of optimum speed of the various combination in a plurality of intervals that S6 divided.
The dutycycle of the control signal when said water pump 1 runs on optimum speed is to make detected internal temperature values reach under the prerequisite of optimum working temperature of cooling system the dutycycle of the control signal of the rotating speed of the water pump 1 that power consumption is minimum.Wherein, A preferred embodiment of the invention; The detection of the optimum working temperature of said cooling system is preferably through first temperature sensor 7 realizes; The dutycycle that is the control signal of said water pump 1 when running on optimum speed is to make first temperature sensor, 7 detected temperature values reach under the prerequisite of optimum working temperature of cooling system the dutycycle of the control signal of the rotating speed of the water pump 1 that power consumption is minimum.
In addition; In order to be the liquid coolant cooling in the water tank 6 better; So that the temperature of the liquid coolant that flows out from the liquid outlet of water tank 6 effectively reduces and can be more effectively to each electric device cooling circulation next time, a preferred embodiment of the invention, said cooling system also comprises fan 14; This fan 14 is positioned near the water tank 6, and is electrically connected with the output terminal of signal amplifier 9 in the controller 16.Fan 14 can be for having the electric fan of a plurality of blades arbitrarily, and be preferably on the position that is placed near water tank 6 bottoms.
Said controller 16 comprises microprocessor 11, signal generator 10 and the signal amplifier 9 of series connection successively; The output terminal of signal amplifier 9 is electrically connected with fan 14; The input end of microprocessor 11 is electrically connected with ambient temperature sensor 13 with at least one temperature sensor 15 respectively; Microprocessor 11 is used for according to the temperature value that receives at least one temperature sensor 15 and 13 detections of ambient temperature sensor; The dutycycle of the control signal when searching out the optimum speed that makes fan 14 run on this fan 14; Signal generator 10 is used to generate the control signal with the specified dutycycle of microprocessor 11, and signal amplifier 9 is used for this control signal is amplified the rotating speed with control fan 14.The optimum speed of said fan 14 is to make detected internal temperature values reach under the prerequisite of optimum working temperature of cooling system the dutycycle of the control signal of the fan 14 that power consumption is minimum.
In addition; Said cooling system is identical with the control principle of the rotating speed of water pump 1 to other principles of the control of the rotating speed of fan 14; The predetermined temperature threshold that is applied in the mapping relations of fan 14 can be provided with separately; It is provided with principle with the above, is easy operation, is preferably to use the predetermined temperature threshold identical with water pump 1.Likewise; Said cooling system can search out the dutycycle corresponding to the control signal of the optimum speed of fan 14 through mapping device 19 according to the result of temperature comparison; And producing control signal with this dutycycle through signal generator 10, this control signal is amplified the rotating speed that fan 14 is finally controlled in the back through signal amplifier 9.
Said each predetermined temperature threshold and revocable can change according to the difference of the factors such as performance, environment for use and control accuracy of selecting for use device.When said cooling system is applied to vehicle, a preferred embodiment of the invention, the example of said mapping relations is as shown in table 1.
In addition; Said mapping relations can be set up between inner each accurate temperature value and fan 14 and/or water pump 1 rotating speed constantly of external environment and cooling system mapping relations one to one; Also can set suitable temperature range, thereby set up between this temperature range and the said rotating speed mapping relations one to one according to said external environment and cooling system temperature inside variation range.In order between the stability of control accuracy and system, to be able to balance, to be preferably according to temperature range and to set said mapping relations.Said mapping relations can be set up the mapping relations of dutycycle of the pairing control signal of optimum speed of said ambient temperature, at least one cooling system temperature inside and fan 14 and water pump 1; In addition; Can also set up through said temperature and detect the mapping relations of controlling the rotating speed of fan 14 or water pump 1 separately; In order to obtain best cooling effect, be preferably foundation detects the rotating speed of controlling fan 14 and water pump 1 simultaneously according to said temperature mapping relations.
A preferred embodiment of the invention; When ambient temperature is 20-25 ℃; When the optimum working temperature of said cooling system is 38 ℃, search out in the cooling system as shown in table 1 the mapping relations of first temperature sensor 7, second temperature sensor 8 and fan 14 and water pump 1 rotating speed through a large amount of tests.Wherein first temperature sensor, 7 detected temperature values can be used for determining whether needing to start fan 14; Because first temperature sensor, 7 detected temperature can be represented the inner maximum temperature of cooling system approx; Therefore when first temperature sensor, 7 detected temperature are lower than the optimum working temperature of cooling system; Necessity that fan 14 does not just work on; Thereby the dutycycle of the control signal that this moment can be through will controlling fan 14 rotating speeds is set at 0 and controls fan 14 and shut down.Because second temperature sensor, 8 detected temperature can be represented the inner minimum temperature of cooling system approx; Therefore when second temperature sensor, 8 detected temperature are lower than zero degrees celsius; Explain that this moment cooling system internal temperature is very low, no longer need high-intensity cooling, thus can be preferentially the dutycycle of control signal through will controlling fan 14 rotating speeds be set at 0 and control fan 14 and shut down and control water pump 1 low-speed running; And when second temperature sensor, 8 detected temperature are lower than ambient temperature; Can stop the running of fan 14 equally, and make water pump 1 low-speed running, for example; The dutycycle of the control signal of the rotating speed of water pump 1 is set at greater than 0 less than 0.25; When second temperature sensor, 8 detected temperature are higher than zero degrees celsius or are higher than ambient temperature, just control the rotating speed of fan 14 and water pump 1 according to being stored in corresponding mapping relations in the mapping device 19, can realize preferable cooling effect thus.In addition; When detected ambient temperature value during greater than the optimum working temperature value of cooling system; Can preferentially control fan 14 and water pump 1 in this cooling system to run up; For example; The dutycycle of the control signal of the rotating speed of control fan 14 and water pump 1 is set at respectively between the 0.65-0.8, just controls the rotating speed of fan 14 and water pump 1 during less than the optimum working temperature value of cooling system, can realize preferable cooling effect thus according to being stored in corresponding mapping relations in the mapping device 19 until the ambient temperature value that is detected.Mapping relations when ambient temperature is 20-25 ℃ are as shown in table 1, in like manner, also can set up ambient temperature less than 20 ℃ and mapping relations during greater than 25 ℃.
The present invention also provides a kind of control method that is used for the cooling system of electric device, and wherein, said control method may further comprise the steps: detect ambient temperature and said cooling system internal temperature; Confirm to make water pump 1 to run on the dutycycle of the control signal of optimum speed according to detected ambient temperature and said cooling system internal temperature; Generation has the control signal of this dutycycle and passes through the rotating speed of this signal controlling water pump 1.
Table 1
| First temperature sensor, 7 temperature (℃) | Second temperature sensor, 8 temperature (℃) | Make |
Make |
| ?≤38 | ?≤38 | 0 | 0.20 |
| ＞38 and＜45 | ?＜30 | 0.30 | 0.35 |
| ＞38 and＜45 | >=30 and<=35 | 0.50 | 0.50 |
| ＞38 and＜45 | ?≥35 | 0.60 | 0.65 |
| ?≥45 | ?＜30 | 0.45 | 0.80 |
| ?≥45 | >=30 and<=35 | 0.55 | 0.75 |
| ?≥45 | ?≥35 | 0.75 | 0.70 |
The dutycycle of the control signal of said optimum speed is to make detected internal temperature values reach under the prerequisite of optimum working temperature of cooling system the dutycycle of the control signal of the rotating speed of the water pump 1 that power consumption is minimum.Wherein, In the optimum working temperature of at least one electric device that the optimum working temperature of said cooling system equals to be cooled off by this cooling system minimum one; And a preferred embodiment of the invention; The detection of the optimum working temperature of said cooling system is preferably through first temperature sensor 7 realizes; The dutycycle that is the control signal of said water pump 1 when running on optimum speed is to make first temperature sensor, 7 detected temperature values reach under the prerequisite of optimum working temperature of cooling system the dutycycle of the control signal of the rotating speed of the water pump 1 that power consumption is minimum.
In addition, said control method is further comprising the steps of: confirm to make fan 14 to run on the dutycycle of the control signal of optimum speed according to detected ambient temperature and said cooling system internal temperature; Generation has the control signal of this dutycycle and passes through the rotating speed of this signal controlling fan 14.
The dutycycle of the control signal of said optimum speed is to make detected internal temperature values reach under the prerequisite of optimum working temperature of cooling system the dutycycle of the control signal of fan 14 rotating speeds that power consumption is minimum.
Said temperature range and make water pump 1 and/or the dutycycle of the control signal of fan 14 when running on optimum speed between one to one the method for building up of relation comprise: set and be used to divide the first temperature threshold S1 and the second temperature threshold S2 corresponding to the temperature range of first temperature sensor, 7 detected temperature; The first temperature threshold S1 is that the second temperature threshold S2 is the 120%-150% of the optimum working temperature of cooling system in the scope of optimum working temperature ± 5% of cooling system; Setting is used to divide the 3rd temperature threshold S3, the 4th temperature threshold S4 and the 5th temperature threshold S5 corresponding to the temperature range of second temperature sensor, 7 detected temperature; 80% of the optimum working temperature of 50%≤S3 of the optimum working temperature of cooling system≤cooling system; 95% of the optimum working temperature of 80%＜S4 of the optimum working temperature of cooling system＜cooling system, 105% of the optimum working temperature of 95%≤S5 of the optimum working temperature of cooling system≤cooling system; Setting is used to divide the ambient temperature threshold value S6 corresponding to the temperature range of the ambient temperature of ambient temperature sensor 13, and said ambient temperature threshold value S6 is 3-8 degree centigrade a plurality of values of being spaced apart in-15-45 degree centigrade scope; Set three temperature ranges that different S1 and S2 divide, four temperature ranges that S3, S4 and S5 divided, the pairing dutycycle that makes water pump 1 run on the control signal of optimum speed of the various combination in a plurality of intervals that S6 divided.
In addition, said method is further comprising the steps of: when detected cooling system internal temperature is lower than zero degrees celsius or is lower than ambient temperature, stop the operation of fan 14, and make the water pump slow running.When detected ambient temperature value was higher than the optimum working temperature of cooling system, control water pump 1 and fan 14 were to run up.
Above-mentioned cooling system internal temperature is first temperature sensor, 7 detected temperature values and/or second temperature sensor, 8 detected temperature values.
A preferred embodiment of the invention, said method is further comprising the steps of: with the control signal amplification that is generated and with the control signal control water pump 1 after amplifying and/or the rotating speed of fan 14.
Following a preferred embodiment of the invention is described the workflow of cooling system of the present invention.As shown in Figure 4; When said cooling system is applied to PHEV; This cooling system is used for carrying out heat interchange with the heat sink of motor-driven control module 2, AC/DC convertor 3, generator 4 and the motor 5 constant power devices of vehicle, to realize cooling to said power device.Computing machine 12 is used in the mapping device 19 of microprocessor 11, presetting required mapping relations.Said cooling system at first detects through first temperature sensor 7 and 8 pairs of temperature of second temperature sensor of ambient temperature sensor 13, internal system; Microprocessor 11 judges whether first temperature sensor, 7 detected temperature values are lower than zero degrees celsius or are lower than ambient temperature sensor 13 detected ambient temperatures afterwards; When temperature sensor 7 detected temperature values are higher than zero degrees celsius and ambient temperature sensor 13 detected ambient temperatures; Microprocessor 11 continues to judge whether said detected ambient temperature is higher than the optimum working temperature of cooling system; When detected ambient temperature value is lower than the optimum working temperature of cooling system; Microprocessor 11 is compared the actual temperature value of detected cooling system internal temperature and ambient temperature with its predetermined temperature threshold separately; With the temperature range that finds said actual temperature to fall into; And this comparative result sent to mapping device 19; After mapping device 19 is received this comparative result; Search out through mapping relations according to this temperature range and to control the dutycycle that water pump 1 and fan 14 run on the control signal of optimum speed separately respectively this moment, microprocessor 11 control-signals generator 10 produce two control signals with said dutycycle respectively afterwards, and amplify through 9 pairs of said two control signals of signal amplifier; Finally control water pump 1 and the optimum speed operation of fan 14 in the cooling system respectively, thereby realized the self-adaptation adjusting of cooling system according to ambient temperature and internal system temperature variation with expectation separately through the control signal after this amplification.
Claims (17)
1. cooling system that is used for electric device; Comprise water tank (6), water pump (1), at least one internal temperature sensor (15) and controller (16); Controller (16) comprises microprocessor (11), signal generator (10) and the signal amplifier (9) of series connection successively; The output terminal of signal amplifier (9) is electrically connected with water pump (1); The input end of microprocessor (11) is electrically connected with at least one internal temperature sensor (15), and said water tank (6) has liquid outlet and liquid inlet, links to each other through pipeline (17) between the liquid outlet of said water tank (6) and the water pump (1); Water pump (1) is used for regulating the flow velocity of the liquid coolant of cooling system; At least one internal temperature sensor (15) is used to detect the cooling system internal temperature, and detected temperature is sent to microprocessor (11), it is characterized in that; Said cooling system also comprises ambient temperature sensor (13); This ambient temperature sensor (13) is electrically connected with the input end of said microprocessor (11) being used to detect ambient temperature, and detected temperature is sent to microprocessor (11), and microprocessor (11) is used for according to the actual temperature value of at least one internal temperature sensor (15) that receives with ambient temperature sensor (13) detection; The temperature range that finds this actual temperature value to fall into; And search out corresponding with this temperature range dutycycle that makes the control signal of the optimum speed that water pump (1) runs on water pump (1), and signal generator (10) is used for generating the control signal with dutycycle that microprocessor (11) found, and signal amplifier (9) is used for this control signal is amplified the rotating speed with control water pump (1); Said optimum speed is to make detected internal temperature values reach under the prerequisite of optimum working temperature of cooling system the rotating speed of the water pump (1) that power consumption is minimum.
2. the cooling system that is used for electric device according to claim 1 is characterized in that, said signal amplifier (9) is the partial pressure type biasing common emitter amplifying circuit that comprises igbt.
3. cooling system according to claim 1; It is characterized in that; Said microprocessor (11) comprises comparison means (18) and the mapping device (19) that is one another in series; The input end of comparison means (18) is electrically connected with at least one internal temperature sensor (15) and ambient temperature sensor (13) respectively; The output terminal of mapping device (19) is electrically connected with signal generator (10); Comparison means (18) is used for the actual temperature value that at least one internal temperature sensor (15) and ambient temperature sensor (13) are detected is compared with its predetermined temperature threshold separately; And the temperature range that finds said actual temperature value thus and fallen into, presetting the mapping relations between the dutycycle of ambient temperature and/or cooling system internal temperature and the control signal of water pump (1) when running on optimum speed in the mapping device (19), these mapping relations are used for confirming concerning one to one between said temperature range and the said dutycycle that makes the control signal of water pump (1) when running on optimum speed.
4. cooling system according to claim 3 is characterized in that, said at least one internal temperature sensor (15) comprises first temperature sensor (7) that is positioned at liquid inlet and second temperature sensor (8) that is positioned at liquid outlet; Said temperature range and make between the dutycycle of the control signal of water pump (1) when running on optimum speed one to one that the method for building up of relation comprises: set and be used for dividing the first temperature threshold S1 and the second temperature threshold S2 corresponding to the temperature range of the detected temperature of first temperature sensor (7); The first temperature threshold S1 is that the second temperature threshold S2 is the 120%-150% of the optimum working temperature of cooling system in the scope of optimum working temperature ± 5% of cooling system;
Setting is used for dividing the 3rd temperature threshold S3, the 4th temperature threshold S4 and the 5th temperature threshold S5 corresponding to the temperature range of the detected temperature of second temperature sensor (8); 80% of the optimum working temperature of 50%≤S3 of the optimum working temperature of cooling system≤cooling system; 95% of the optimum working temperature of 80%＜S4 of the optimum working temperature of cooling system＜cooling system, 105% of the optimum working temperature of 95%≤S5 of the optimum working temperature of cooling system≤cooling system;
Setting is used for dividing the ambient temperature threshold value S6 corresponding to the temperature range of the ambient temperature of ambient temperature sensor (13), and said ambient temperature threshold value S6 is 3-8 degree centigrade a plurality of values of being spaced apart in-15-45 degree centigrade scope;
Set three temperature ranges that different S1 and S2 divide, four temperature ranges that S3, S4 and S5 divided, the pairing dutycycle that makes water pump (1) run on the control signal of optimum speed of the various combination in a plurality of intervals that S6 divided.
5. according to claim 3 or the 4 described cooling systems that are used for electric device; It is characterized in that; The dutycycle of the control signal of said water pump (1) when running on optimum speed is to make detected internal temperature values reach under the prerequisite of optimum working temperature of cooling system the dutycycle of the control signal of the rotating speed of the water pump (1) that power consumption is minimum.
6. according to any described cooling system that is used for electric device among the claim 1-4; It is characterized in that; Said cooling system also comprises fan (14); This fan (14) is positioned near the water tank (6), and is electrically connected with the output terminal of controller (16), and said controller (16) also is used for controlling according to ambient temperature sensor (13) and the detected temperature value of at least one internal temperature sensor (15) rotating speed of fan (14).
7. the cooling system that is used for electric device according to claim 6; It is characterized in that; Said controller (16) comprises microprocessor (11), signal generator (10) and the signal amplifier (9) of series connection successively; The output terminal of signal amplifier (9) is electrically connected with fan (14); The input end of microprocessor (11) is electrically connected with at least one internal temperature sensor (15) and ambient temperature sensor (13) respectively; Microprocessor (11) is used for according to receiving the temperature value that at least one internal temperature sensor (15) and ambient temperature sensor (13) detect; The dutycycle of the control signal when searching out the optimum speed that makes fan (14) run on this fan (14), signal generator (10) are used for generating the control signal with the specified dutycycle of microprocessor (11), and signal amplifier (9) is used for this control signal is amplified the rotating speed with control fan (14).
8. the cooling system that is used for electric device according to claim 7; It is characterized in that; The dutycycle of the control signal of said fan (14) when running on optimum speed is to make detected internal temperature values reach under the prerequisite of optimum working temperature of cooling system the dutycycle of the control signal of the fan (14) that power consumption is minimum.
9. according to any described cooling system that is used for electric device in claim 4 or 8; It is characterized in that in the optimum working temperature of at least one electric device that the optimum working temperature of said cooling system equals to be cooled off by this cooling system minimum one.
10. a control method that is used for the cooling system of electric device is characterized in that, said control method may further comprise the steps: detect ambient temperature and said cooling system internal temperature; According to the actual temperature value that obtains through detection ambient temperature and said cooling system internal temperature; The temperature range that finds this actual temperature value to fall into, and search out corresponding with this temperature range dutycycle that makes the control signal of the optimum speed that water pump (1) runs on water pump (1); Generation has the control signal of this dutycycle and passes through the rotating speed of this signal controlling water pump (1); Said optimum speed is to make detected internal temperature values reach under the prerequisite of optimum working temperature of cooling system the rotating speed of the water pump (1) that power consumption is minimum.
11. control method according to claim 10; It is characterized in that; The dutycycle of the control signal of said optimum speed is to make detected internal temperature values reach under the prerequisite of optimum working temperature of cooling system the dutycycle of the control signal of the rotating speed of the water pump (1) that power consumption is minimum.
12. method according to claim 10; It is characterized in that; Said method is further comprising the steps of: according to the actual temperature value that obtains through detection ambient temperature and said cooling system internal temperature; The temperature range that finds this actual temperature value to fall into, and search out the make fan (14) corresponding with this temperature range and run on the dutycycle of the control signal of optimum speed; Generation has the control signal of this dutycycle and passes through the rotating speed of this signal controlling fan (14).
13. control method according to claim 12; It is characterized in that; The dutycycle of the control signal of said optimum speed is to make detected internal temperature values reach under the prerequisite of optimum working temperature of cooling system the dutycycle of the control signal of the rotating speed of the fan (14) that power consumption is minimum.
14., it is characterized in that in the optimum working temperature of at least one electric device that the optimum working temperature of said cooling system equals to be cooled off by this cooling system minimum one according to claim 11 or 13 described control methods.
15. according to any described method among the claim 10-13; It is characterized in that; Said cooling system internal temperature is detected temperature value of first temperature sensor (7) and/or the detected temperature value of second temperature sensor (8), said temperature range and make water pump (1) and/or the dutycycle of the control signal of fan (14) when running on optimum speed between one to one the relation method for building up comprise:
Setting is used for dividing the first temperature threshold S1 and the second temperature threshold S2 corresponding to the temperature range of the detected temperature of first temperature sensor (7); The first temperature threshold S1 is that the second temperature threshold S2 is the 120%-150% of the optimum working temperature of cooling system in the scope of optimum working temperature ± 5% of cooling system;
Setting is used for dividing the 3rd temperature threshold S3, the 4th temperature threshold S4 and the 5th temperature threshold S5 corresponding to the temperature range of the detected temperature of second temperature sensor (8); 80% of the optimum working temperature of 50%≤S3 of the optimum working temperature of cooling system≤cooling system; 95% of the optimum working temperature of 80%＜S4 of the optimum working temperature of cooling system＜cooling system, 105% of the optimum working temperature of 95%≤S5 of the optimum working temperature of cooling system≤cooling system;
Setting is used for dividing the ambient temperature threshold value S6 corresponding to the temperature range of the ambient temperature of ambient temperature sensor (13), and said ambient temperature threshold value S6 is 3-8 degree centigrade a plurality of values of being spaced apart in-15-45 degree centigrade scope;
Set three temperature ranges that different S1 and S2 divide, four temperature ranges that S3, S4 and S5 divided, the pairing dutycycle that makes water pump (1) run on the control signal of optimum speed of the various combination in a plurality of intervals that S6 divided.
16., it is characterized in that said method is further comprising the steps of: with the control signal amplification that is generated and with the control signal control water pump (1) after amplifying and/or the rotating speed of fan (14) according to any described method among the claim 10-13.
17., it is characterized in that said method is further comprising the steps of according to any described method among the claim 10-13:
When detected cooling system internal temperature is lower than zero degrees celsius or is lower than ambient temperature, stop the running of fan (14), and make water pump (1) low-speed running;
When detected ambient temperature value was higher than the optimum working temperature of cooling system, control water pump (1) and fan (14) were to run up.
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| CN2007103078385A CN101470451B (en) | 2007-12-28 | 2007-12-28 | Cooling system used for electric power apparatus and its control method |
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| CN101973204B (en) * | 2010-10-26 | 2013-01-16 | 上海瑞华(集团)有限公司 | Circulatory cooling device and method of pure electric vehicle |
| CN102777367B (en) * | 2012-08-20 | 2016-01-06 | 武汉理工大学 | With the automobile electronic water pump controller of multiple interfaces |
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| CN107237762A (en) * | 2017-06-30 | 2017-10-10 | 北京长安汽车工程技术研究有限责任公司 | Control method, control system, cooling circuit and the electric car of water pump |
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| CN109710001A (en) * | 2018-12-06 | 2019-05-03 | 芜湖市努尔航空信息科技有限公司 | A kind of aerogenerator monitoring temperature and regulating system |
| CN111375096A (en) * | 2018-12-28 | 2020-07-07 | 上海微创心力医疗科技有限公司 | Cooling system and catheter pump system |
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| CN111109187B (en) * | 2020-01-16 | 2022-04-12 | 成都工贸职业技术学院 | Transportation and preservation device and method for dormant living bodies |
| CN114179403B (en) * | 2022-02-15 | 2022-05-20 | 深圳市博盛新材料有限公司 | Battery diaphragm manufacturing system of rechargeable battery and manufacturing method thereof |
| CN116512950B (en) * | 2023-06-26 | 2023-09-12 | 毫厘机电(苏州)有限公司 | Control method, device and computer program product of charging gun cooling equipment |
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