A kind of electronic thermostat that has automatic fast shut-off function
Technical field
The utility model relates to a kind of electronic thermostat, particularly a kind of electronic thermostat that has automatic fast shut-off function.
Background technique
At present the thermostat that uses in the engine-cooling system mainly is waxtype thermostat, is to realize control for the big short circle of thermostat by its inner wax formula element according to its temperature characteristic.When coolant temperature was low, wax formula element then presented solid state, the thermostat major cycle in the cooling system that kills engine this moment, and the cooling liquid short circle of only flowing through is so that engine water temperature reaches operating temperature as early as possible.When coolant temperature further promotes, make wax formula element progressively from solid-state liquefy, volume increases, and the mechanical component that drives in the thermostat is opened the major cycle path, makes high temperature coolant begin the to flow through radiator of motor.
The thermostat of this structure, the most important point is exactly to rely on the realization of wax formula heat responsive element for the control of each path of thermostat, and this type of heat responsive element is slower with the dynamic characteristic of temperature, be that wax slowly melts after temperature increase, therefore speed of response is slow, and when engine water temperature progressively is reduced under the normal working temperature, because the wax element is longer to the reaction time of solid by liquid, can not realize the effect of fast shut-off major cycle path.
The model utility content
In order to overcome the defective of prior art, the utility model provides a kind of electronic thermostat that has automatic fast shut-off function, thereby makes the work fast and reliable of thermostat.
The utility model is achieved by the following technical solution:
A kind of electronic thermostat that has automatic fast shut-off function, comprise controller, and cooling liquid entrance, first cooling liquid outlet, second cooling liquid outlet and the 3rd cooling liquid outlet, described cooling liquid entrance and the 3rd cooling liquid outlet place all are equipped with the switch type solenoid valve, and described first cooling liquid outlet and the second cooling liquid outlet place all are equipped with the proportion expression solenoid valve;
Described first cooling liquid outlet is used for linking to each other with engine radiator, and described second cooling liquid outlet is used for linking to each other with engine cooling water jacket; Described controller all links to each other with engine water temperature sensor, switch type solenoid valve and proportion expression solenoid valve.
Further, the 3rd cooling liquid outlet links to each other with throttle system or the air-conditioning system of motor.
Further, described controller is single-chip microcomputer.
The electronic thermostat that has automatic fast shut-off function described in the utility model links to each other with engine radiator by first cooling liquid outlet, thereby realizes the major cycle path of cooling liquid; Link to each other with engine cooling water jacket by second cooling liquid outlet, namely realize the short circle of engine coolant.Throttle system or the air-conditioning system of motor can be led to as reserved passageway in the 3rd cooling liquid outlet place.Controller is collected from the signal of motor cooling-water temperature sensor, and when the temperature of cooling-water temperature sensor was lower than the normal working temperature value, controller was closed the switch type solenoid valve at cooling liquid ingress and the 3rd cooling liquid outlet place.When the temperature of cooling-water temperature sensor reaches or is higher than normal working temperature, then open the switch type solenoid valve at cooling liquid ingress and the 3rd cooling liquid outlet place.
No matter what working state motor is in, as long as the cooling liquid water temperature is low excessively, the whole electronic thermostat passage of fast shut-off allows cooling liquid be in short circle all the time automatically, reaches the proper functioning level up to water temperature.Adopt the state that technique scheme can highly effective control engine interior coolant flow, by this type of electronic thermostat control, can reach the better state of work of engine-cooling system that allows.The utility model preferably adopts single-chip microcomputer as controller simultaneously, and cost is low, and is easy to use.
Description of drawings
Fig. 1 is the structural drawing of electronic thermostat described in the utility model.
Embodiment
The utility model is described in more detail below in conjunction with the drawings and specific embodiments.
As shown in Figure 1, the utility model provides a kind of electronic thermostat that has automatic fast shut-off function, comprise controller 5, and cooling liquid entrance 4, first cooling liquid outlet 1, second cooling liquid outlet 2 and the 3rd cooling liquid outlet 3, described cooling liquid entrance 4 and the 3rd cooling liquid outlet 3 places all are equipped with switch type solenoid valve 6, and described first cooling liquid outlet 1 and second cooling liquid outlet, 2 places all are equipped with proportion expression solenoid valve 7; First cooling liquid outlet 1 links to each other with engine radiator, and second cooling liquid outlet 2 links to each other with engine cooling water jacket; Described controller 5 all links to each other with engine water temperature sensor, switch type solenoid valve 6 and proportion expression solenoid valve 7.The 3rd cooling liquid outlet 3 can lead to throttle system or the air-conditioning system of motor as reserved passageway.In order to reduce cost, controller described in the present embodiment 5 is single-chip microcomputer.
Single-chip microcomputer is controlled the switch type solenoid valve 6 at cooling liquid ingress 4 and the 3rd cooling liquid outlet 3 places simultaneously, controls the proportion expression solenoid valve at first cooling liquid outlet, 1 place and second cooling liquid outlet, 2 places.Single-chip microcomputer is collected from the signal of cooling-water temperature sensor, according to self judgment rule, and the opening and closing of the switch type solenoid valve 6 at control cooling liquid ingress 4 and the 3rd cooling liquid outlet 3 places; Control the unlatching ratio of first cooling liquid outlet, 1 place and second cooling liquid outlet, 2 place's proportion expression solenoid valves 7.When motor was in hot machine state, the single-chip microcomputer of this electronic thermostat just cut out, and allows cooling liquid be in the short circle state all the time, can reach normal working temperature fast to impel engine water temperature.Adopt the state that technique scheme can highly effective control engine interior coolant flow, by this type of electronic thermostat control, can reach the better state of work of engine-cooling system that allows.
The utility model not only is confined to above-mentioned embodiment; persons skilled in the art are according to the disclosed content of the utility model; can adopt other multiple embodiment to implement the utility model; therefore; every employing project organization of the present utility model and thinking; do some simple designs that change or change, all fall into the scope of the utility model protection.