CN104454119A - Constant-temperature control device for engine cooling liquid and control method of constant-temperature control device - Google Patents
Constant-temperature control device for engine cooling liquid and control method of constant-temperature control device Download PDFInfo
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- CN104454119A CN104454119A CN201410743427.0A CN201410743427A CN104454119A CN 104454119 A CN104454119 A CN 104454119A CN 201410743427 A CN201410743427 A CN 201410743427A CN 104454119 A CN104454119 A CN 104454119A
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- thermostatically
- pipeline
- controlled equipment
- engine coolant
- controller
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
- F01P7/00—Controlling of coolant flow
- F01P7/14—Controlling of coolant flow the coolant being liquid
- F01P7/16—Controlling of coolant flow the coolant being liquid by thermostatic control
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Combined Controls Of Internal Combustion Engines (AREA)
Abstract
The invention discloses a constant-temperature control device for engine cooling liquid and a control method of the constant-temperature control device. The device comprises a controller and a heat exchanger. The water inlet of the heat exchanger is connected with the cooling water inlet of the constant-temperature control device, the first water outlet of the heat exchanger is connected with the cooling water outlet of the constant-temperature control device, and a cooling water in-out circulating loop. A first one-way electronic valve is further disposed on a pipeline connecting the cooling water outlet of the constant-temperature control device and the first water outlet of the heat exchanger. An engine cooling liquid inlet is connected with an engine cooling liquid outlet through a proportional regulating valve to form a cooling liquid circulation loop. The cooling water inlet pipeline of the constant-temperature control device, an expansion water tank, the proportional regulating valve, the engine cooling liquid inlet pipeline, the engine cooling liquid outlet pipeline, the second water outlet pipeline of the heat exchanger and the cooling liquid emptying port pipeline of the constant-temperature control device form a pollution discharge circulation loop.
Description
Technical field
The present invention relates to the test conditions safeguards system that the test of a kind of vehicular engine is indispensable, particularly relate to a kind of thermostatically-controlled equipment for engine coolant and controlling method thereof.
Background technique
Motor can carry out in test the complex working condition tests such as instantaneous conditions, mixed flow regime, exhaust gas analysis, the change of engine power and altering a great deal of engine heat load, the rotating speed instantaneous variation of motor is large simultaneously, and the temperature of the cooling liquid therefore in constant temperature system and flow are also constantly changes.
For ensureing the accuracy that engine parameter measures, when entering motor to process of the test cooling liquid, temperature must be carried out constant, truly to measure the various performance parameters of motor within the limits prescribed, and motor itself does not possess the constant control function of temperature, so can only be supported by external condition safeguards system.
Summary of the invention
For solving the problem, the invention provides a kind of thermostatically-controlled equipment for engine coolant and controlling method thereof, engine outlet coolant temperature can be made to remain on a setting value, such as 80 ± 2 DEG C, temperature is made to produce less fluctuation, and there is supplementary cooling water function automatically, when making engine work, cooling liquid can keep temperature constant after flowing through this device in certain tolerance, wherein, cooling water circulation water route uses tap water, cycle of engine water route can use antifreeze liquid or tap water, cooling water and cooling liquid is used to distinguish.
For achieving the above object, the present invention takes following concrete scheme:
For a thermostatically-controlled equipment for engine coolant, comprising:
Controller; And
Heat exchanger, its water intake is connected with the cooling water intake of thermostatically-controlled equipment, and the first water outlet of described heat exchanger is connected with the cooling water outlet of thermostatically-controlled equipment, forms cooling water turnover circulation loop;
The pipeline that the cooling water outlet of described thermostatically-controlled equipment is connected with heat exchanger first water outlet is also provided with the first Unidirectional solenoid valve; And
Ratio adjusting valve; Wherein, engine coolant water intake is connected by described ratio adjusting valve with engine coolant water outlet, forms liquid circulation loop; The pipeline that the water outlet of described ratio adjusting valve is connected with engine coolant water intake is provided with a temperature transducer;
The cooling water intake of thermostatically-controlled equipment is connected with the 3rd port of ratio adjusting valve, wherein, the cooling water intake pipeline of thermostatically-controlled equipment, ratio adjusting valve, engine coolant water inlet conduit, engine coolant water outlet pipeline, the second water outlet pipeline of heat exchanger and the cooling liquid evacuation port pipeline of thermostatically-controlled equipment, form blowdown circulation loop;
The pipeline that the cooling water intake of described thermostatically-controlled equipment is connected with the 3rd port of ratio adjusting valve is provided with the second Unidirectional solenoid valve and swelling water tank; The pipeline that described second Unidirectional solenoid valve is connected with swelling water tank is also connected with the 4th port of heat exchanger.
This device comprises further: the computer unit intercomed mutually with controller; Drive Protecting Circuit, its control signal receiving controller drives the opening and closing of the first Unidirectional solenoid valve and the second Unidirectional solenoid valve;
With the analog output module of controller communication, be that analog output is to controller for conversion temperature sensor collection signal; And
The operation input unit be connected with controller, for the liquid level minimum in swelling water tank and the coolant temperature predetermined value operation input entering motor; And text display.
The float type level switch of the liquid level detected in swelling water tank is provided with in described swelling water tank.
The pipeline that described ratio adjusting valve is connected with temperature transducer is provided with the first pressure gauge of the pressure for Real Time Observation cooling water circulation loop.
The pipeline that the cooling water intake of described thermostatically-controlled equipment is connected with the water intake of heat exchanger is provided with the second pressure gauge of the pressure for observing engine coolant circulation loop.
The pipeline that described ratio adjusting valve is connected with engine coolant water intake is provided with a recycle pump.
For a thermostatically-controlled equipment for engine coolant, its controlling method, comprises the following steps:
S10: initialization, computer unit setting swelling water tank liquid level minimum and the coolant temperature predetermined value entering motor;
S20: the swelling water tank liquid level signal that float type level switch detects exports controller to, and the coolant temperature entering motor that temperature transducer detects also exports controller to through analog output module;
S30: the signal received by controller compares with swelling water tank liquid level minimum and the coolant temperature predetermined value entering motor respectively;
S40: controller controls the opening and closing of the second Unidirectional solenoid valve and the first Unidirectional solenoid valve by Drive Protecting Circuit, and the opening and closing angle of two of control ratio modulating valve water intakes.
The detailed process of described step S40 is:
When the liquid level signal of the swelling water tank that controller receives is lower than the swelling water tank liquid level minimum set, controller opens the second Unidirectional solenoid valve by Drive Protecting Circuit, close the first Unidirectional solenoid valve simultaneously, cooling water is successively by cooling water inlet pipe road and second Unidirectional solenoid valve of motor thermostatically-controlled equipment, enter swelling water tank, realize system fluid infusion;
When the coolant temperature value of the motor that the temperature transducer that controller receives detects is not equal to predetermined value, controller control ratio modulating valve, entered the ratio of motor by the cooling liquid in the cooling water in pid algorithm resize ratio modulating valve intake pipe and another intake pipe, reach and control engine coolant constant temperature.
Beneficial effect of the present invention:
(1) cooling liquid constant thermal apparatus of the present invention is stable and reliable for performance, and reply working conditions change can realize quick response, and steady state controling precision all reaches ± 2 DEG C, and temperature fluctuation is little, and has and automatically supplement cooling liquid function;
(2) ratio adjusting valve has been placed in motor Inner eycle water route, outer circulation road is in normally open all the time, when temperature transducer detects temperature variation by the aperture of control system control ratio modulating valve, realize the quick response that heat turns cold operating mode, fast response time, control accuracy is high;
(3) PID can be realized for different motor to regulate, as regulated static difference, temperature fluctuation amplitude, the temperature stabilization process time of actual value and setting value;
(4) devise blowdown loop to realize the blowdown of water degradation or long-term not used time and empty function.
Accompanying drawing explanation
Fig. 1 is a) inside configuration schematic diagram of the present invention;
Fig. 1 b) be the schematic diagram of water outlet of the present invention and water intake;
Fig. 2 is basic cooling liquid of the present invention and cooling water circulation piping diagram;
Fig. 3 is that circulation loop of the present invention comprises recycle pump and manometric circulation loop figure;
Fig. 4 is control principle drawing of the present invention.
In figure: 1, controller, 2, swelling water tank, 3, heat exchanger, 4, ratio adjusting valve, 5, the first Unidirectional solenoid valve, the 6, second Unidirectional solenoid valve, 7, temperature transducer, 8, liquid-level switch, 9, recycle pump, the 10, first pressure gauge, the 11, second pressure gauge, 12, support; A, engine coolant water intake, B, engine coolant water outlet, C, cooling water intake, D, cooling water outlet, E, cooling liquid evacuation port.
Embodiment
As Fig. 1 a) and Fig. 1 b) shown in, a kind of thermostatically-controlled equipment for engine coolant, comprise heat exchanger 3, swelling water tank 2, first Unidirectional solenoid valve 5, second Unidirectional solenoid valve 6, ratio adjusting valve 4, temperature transducer 7 and controller 1, these parts are all arranged on support 12; Five import and export of this device are respectively: engine coolant water inlet A, engine coolant water outlet B, cooling water outlet C, cooling cooling water intake D, cooling liquid evacuation port E.
Embodiment one:
As shown in Figure 2, for a thermostatically-controlled equipment for engine coolant, comprise heat exchanger 3, its water intake is connected with the cooling water intake C of thermostatically-controlled equipment, first water outlet is connected with the cooling water outlet D of thermostatically-controlled equipment, forms cooling water turnover circulation loop; The pipeline that the cooling water outlet D of described thermostatically-controlled equipment is connected with heat exchanger 3 first water outlet is also provided with the first Unidirectional solenoid valve 5;
Engine coolant water inlet A is connected by a ratio adjusting valve 4 with engine coolant water outlet B, forms liquid circulation loop; The pipeline that the water outlet of described ratio adjusting valve 4 is connected with engine coolant water inlet A is provided with a temperature transducer 7;
The cooling water water inlet C mouth of thermostatically-controlled equipment is connected with another water intake of ratio adjusting valve 4, and its pipeline connected is respectively equipped with the second Unidirectional solenoid valve 6 and swelling water tank 2; The pipeline that second Unidirectional solenoid valve 6 is connected with swelling water tank 2 is connected with the 4th port of heat exchanger 3; Wherein, the cooling water intake C pipeline of thermostatically-controlled equipment, swelling water tank 2, ratio adjusting valve 4, engine coolant water inlet A pipeline, engine coolant water outlet B pipeline, the second water outlet pipeline of heat exchanger 3 and the cooling liquid evacuation port E pipeline of thermostatically-controlled equipment, form blowdown circulation loop;
Controller 1, it controls the second Unidirectional solenoid valve 6, first Unidirectional solenoid valve 5 and ratio adjusting valve 4 respectively; And the computer unit to intercom with controller 1 phase.
Embodiment two:
As shown in Figure 3, this device is serially connected with the first pressure gauge 10 between ratio adjusting valve 4 and the pipeline of temperature transducer 7, for the pressure of Real Time Observation cooling water circulation loop; The second pressure gauge 11 is serially connected with, for the pressure of Real Time Observation engine coolant circulation loop between the water intake C and the pipeline of heat exchanger 3 water intake of cooling water.
Engine coolant water inlet A pipeline, engine coolant water outlet B pipeline and ratio adjusting valve 4 form liquid circulation loop, set water temperature is provided to motor, and entering motor by engine coolant water inlet A by pipeline, engine water outlet enters thermostatically controlled device by engine coolant water outlet B;
Cooling water enters thermostatically controlled device by the cooling water intake of thermostatically-controlled equipment, cooling water intake C pipeline, heat exchanger 3, second Unidirectional solenoid valve 6 and cooling water outlet D pipeline form cooling water turnover circulation loop, cooling capacity is provided, realizes heat and turn cold operating mode;
The cooling water intake C pipeline of thermostatically-controlled equipment, swelling water tank 2, ratio adjusting valve 4, engine coolant water inlet conduit A, engine coolant water outlet pipeline B, the second water outlet pipeline of heat exchanger 3 and the cooling liquid evacuation port E pipeline of thermostatically-controlled equipment, form blowdown circulation loop; When cooling liquid evacuation port E opens, the cooling liquid in swelling water tank 2, heat exchanger 3 and system pipeline all can be discharged along with tube runs, realizes blowdown, empties function.
As shown in Figure 4, controlling method of the present invention, comprises the following steps:
S10: initialization, computer unit setting swelling water tank liquid level minimum and the coolant temperature predetermined value entering motor;
S20: the swelling water tank liquid level signal that float type level switch detects exports controller to, and the coolant temperature entering motor that temperature transducer detects also exports controller to through analog output module;
S30: the signal received by controller compares with swelling water tank liquid level minimum and the coolant temperature predetermined value entering motor respectively;
S40: controller controls the opening and closing of the second Unidirectional solenoid valve and the first Unidirectional solenoid valve by Drive Protecting Circuit, and the opening and closing angle of two of control ratio modulating valve water intakes.
The detailed process of described step S40 is:
When the liquid level signal of the swelling water tank that controller receives is lower than the swelling water tank liquid level minimum set, controller opens the second Unidirectional solenoid valve by Drive Protecting Circuit, close the first Unidirectional solenoid valve simultaneously, cooling water is successively by cooling water inlet pipe road and second Unidirectional solenoid valve of motor thermostatically-controlled equipment, enter swelling water tank, realize system fluid infusion;
When the coolant temperature value of the motor that the temperature transducer that controller receives detects is not equal to predetermined value, controller control ratio modulating valve, entered the ratio of motor by the cooling liquid in the cooling water in pid algorithm resize ratio modulating valve intake pipe and another intake pipe, reach and control engine coolant constant temperature.
Claims (8)
1. for a thermostatically-controlled equipment for engine coolant, it is characterized in that, comprising:
Controller; And
Heat exchanger, its water intake is connected with the cooling water intake of thermostatically-controlled equipment, and the first water outlet of described heat exchanger is connected with the cooling water outlet of thermostatically-controlled equipment, forms cooling water turnover circulation loop;
The pipeline that the cooling water outlet of described thermostatically-controlled equipment is connected with heat exchanger first water outlet is also provided with the first Unidirectional solenoid valve; And
Ratio adjusting valve; Wherein, engine coolant water intake is connected by described ratio adjusting valve with engine coolant water outlet, forms liquid circulation loop; The pipeline that the water outlet of described ratio adjusting valve is connected with engine coolant water intake is provided with a temperature transducer;
The cooling water intake of thermostatically-controlled equipment is connected with the 3rd port of ratio adjusting valve, wherein, the cooling water intake pipeline of thermostatically-controlled equipment, ratio adjusting valve, engine coolant water inlet conduit, engine coolant water outlet pipeline, the second water outlet pipeline of heat exchanger and the cooling liquid evacuation port pipeline of thermostatically-controlled equipment, form blowdown circulation loop;
The pipeline that the cooling water intake of described thermostatically-controlled equipment is connected with the 3rd port of ratio adjusting valve is provided with the second Unidirectional solenoid valve and swelling water tank; The pipeline that described second Unidirectional solenoid valve is connected with swelling water tank is also connected with the 4th port of heat exchanger.
2. a kind of thermostatically-controlled equipment for engine coolant as claimed in claim 1, it is characterized in that, this device comprises further: the computer unit intercomed mutually with controller; Drive Protecting Circuit, its control signal receiving controller drives the opening and closing of the first Unidirectional solenoid valve and the second Unidirectional solenoid valve;
With the analog output module of controller communication, be that analog output is to controller for conversion temperature sensor collection signal; And
The operation input unit be connected with controller, for the liquid level minimum in swelling water tank and the coolant temperature predetermined value operation input entering motor; And text display.
3. a kind of thermostatically-controlled equipment for engine coolant as claimed in claim 1, is characterized in that, is provided with the float type level switch of the liquid level detected in swelling water tank in described swelling water tank.
4. a kind of thermostatically-controlled equipment for engine coolant as claimed in claim 1, it is characterized in that, the pipeline that described ratio adjusting valve is connected with temperature transducer is provided with the first pressure gauge of the pressure for Real Time Observation cooling water circulation loop.
5. a kind of thermostatically-controlled equipment for engine coolant as claimed in claim 1, it is characterized in that, the pipeline that the cooling water intake of described thermostatically-controlled equipment is connected with the water intake of heat exchanger is provided with the second pressure gauge of the pressure for observing engine coolant circulation loop.
6. a kind of thermostatically-controlled equipment for engine coolant as claimed in claim 1, it is characterized in that, the pipeline that described ratio adjusting valve is connected with engine coolant water intake is provided with a recycle pump.
7. a controlling method for the thermostatically-controlled equipment for engine coolant as described in any one of claim 1-6, is characterized in that, comprise the following steps:
S10: initialization, computer unit setting swelling water tank liquid level minimum and the coolant temperature predetermined value entering motor;
S20: the swelling water tank liquid level signal that float type level switch detects exports controller to, and the coolant temperature entering motor that temperature transducer detects also exports controller to through analog output module;
S30: the signal received by controller compares with swelling water tank liquid level minimum and the coolant temperature predetermined value entering motor respectively;
S40: controller controls the opening and closing of the second Unidirectional solenoid valve and the first Unidirectional solenoid valve by Drive Protecting Circuit, and the opening and closing angle of two of control ratio modulating valve water intakes.
8. the controlling method of a kind of thermostatically-controlled equipment for engine coolant as claimed in claim 7, it is characterized in that, the detailed process of described step S40 is:
When the liquid level signal of the swelling water tank that controller receives is lower than the swelling water tank liquid level minimum set, controller opens the second Unidirectional solenoid valve by Drive Protecting Circuit, close the first Unidirectional solenoid valve simultaneously, cooling water is successively by cooling water inlet pipe road and second Unidirectional solenoid valve of motor thermostatically-controlled equipment, enter swelling water tank, realize system fluid infusion;
When the coolant temperature value of the motor that the temperature transducer that controller receives detects is not equal to predetermined value, controller control ratio modulating valve, entered the ratio of motor by the cooling liquid in the cooling water in pid algorithm resize ratio modulating valve intake pipe and another intake pipe, reach and control engine coolant constant temperature.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410743427.0A CN104454119A (en) | 2014-12-08 | 2014-12-08 | Constant-temperature control device for engine cooling liquid and control method of constant-temperature control device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410743427.0A CN104454119A (en) | 2014-12-08 | 2014-12-08 | Constant-temperature control device for engine cooling liquid and control method of constant-temperature control device |
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| CN104454119A true CN104454119A (en) | 2015-03-25 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410743427.0A Pending CN104454119A (en) | 2014-12-08 | 2014-12-08 | Constant-temperature control device for engine cooling liquid and control method of constant-temperature control device |
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| CN (1) | CN104454119A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108979835A (en) * | 2018-09-05 | 2018-12-11 | 福州新亭宣机电技术有限公司 | A kind of diesel engine water device for cooling and water-cooling method |
| CN109854429A (en) * | 2019-03-11 | 2019-06-07 | 北京百度网讯科技有限公司 | Heating system for engine coolant |
| CN112291989A (en) * | 2019-07-24 | 2021-01-29 | 鸿富锦精密电子(天津)有限公司 | Cooling device |
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| US5950576A (en) * | 1998-06-30 | 1999-09-14 | Siemens Canada Limited | Proportional coolant valve |
| CN2900807Y (en) * | 2006-05-26 | 2007-05-16 | 广西玉柴机器股份有限公司 | Temperature controller for engine cooling liquid |
| CN201679553U (en) * | 2010-05-20 | 2010-12-22 | 南通力达环保设备有限公司 | Temperature control system for cooling water of engine |
| CN102817695A (en) * | 2011-11-30 | 2012-12-12 | 凯迈(洛阳)机电有限公司 | Constant temperature, constant pressure and constant flow device of cooling liquid |
| CN204386715U (en) * | 2014-12-08 | 2015-06-10 | 济南工拓机电设备有限公司 | For the thermostatically-controlled equipment of engine coolant |
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2014
- 2014-12-08 CN CN201410743427.0A patent/CN104454119A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5950576A (en) * | 1998-06-30 | 1999-09-14 | Siemens Canada Limited | Proportional coolant valve |
| CN2900807Y (en) * | 2006-05-26 | 2007-05-16 | 广西玉柴机器股份有限公司 | Temperature controller for engine cooling liquid |
| CN201679553U (en) * | 2010-05-20 | 2010-12-22 | 南通力达环保设备有限公司 | Temperature control system for cooling water of engine |
| CN102817695A (en) * | 2011-11-30 | 2012-12-12 | 凯迈(洛阳)机电有限公司 | Constant temperature, constant pressure and constant flow device of cooling liquid |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108979835A (en) * | 2018-09-05 | 2018-12-11 | 福州新亭宣机电技术有限公司 | A kind of diesel engine water device for cooling and water-cooling method |
| CN108979835B (en) * | 2018-09-05 | 2024-02-13 | 福建林丰科技有限公司 | Water cooling device and water cooling method for diesel engine |
| CN109854429A (en) * | 2019-03-11 | 2019-06-07 | 北京百度网讯科技有限公司 | Heating system for engine coolant |
| CN109854429B (en) * | 2019-03-11 | 2022-11-18 | 北京百度网讯科技有限公司 | Heating system for engine coolant |
| CN112291989A (en) * | 2019-07-24 | 2021-01-29 | 鸿富锦精密电子(天津)有限公司 | Cooling device |
| CN112291989B (en) * | 2019-07-24 | 2022-04-29 | 富联精密电子(天津)有限公司 | Cooling device |
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Application publication date: 20150325 |