CN1041989A - Thermostat - Google Patents

Abstract

The thermoregulator that control cooling water circulation loop, adjusting cooling water temperature are all arranged in the automobile.Mainly use two kinds of liquid and wax formulas in the Hyundai Motor.They all have the shortcoming that poor reliability, life-span are short, the processed complex cost is high.The present invention is exactly for overcoming the shortcoming of traditional thermostat, the thermostat of new generation that utilizes marmem to be developed into.It mainly is to utilize shape-memory alloy wire spring and backspring and other parts of setting deformation temperature, when water temperature is higher than setting temperature, leads to the valve open of radiator, shuts the valve in the water route of straight-through water pump simultaneously.Situation was opposite when temperature was lower than setting temperature.

Description

Thermostat

In the cooling system of automobile, most all be equipped with the control cooling water flow to thermostat.Its objective is that whether the control cooling water will pass through radiator heat-dissipation, finally guarantees the water temperature of cooling water.Hyundai Motor mainly contains two kinds of liquid-type and wax formulas with thermostat, and referring to volumes such as " auto parts machinery knowledge " Chen Jinyuan, People's Transportation Press publishes.Identical but the structure difference of their effect.Liquid thermostat mainly is to enclose ethanol 2/3(or other easy evaporating liquid in cylinder) and the mixed solution of water 1/3.This liquid is easily evaporation expansion when being heated, and so just can close the side valve door in the valve on opening, and plays the control water route.This thermostat is comparatively responsive to the working pressure in the cooling system, functional reliability is poor, the life-span is short, process for machining and manufacturing is complicated, the cost height, there is a temp-sensitive apparatus at the center of waxtype thermostat, and the wax during normal temperature in the temp-sensitive apparatus becomes solid, and wax melted gradually and becomes liquid when temperature raise, its volumetric expansion, by the particular design in the temp-sensitive apparatus, make expansive force become thrust and make valve open, lower valve is closed the effect of also having played the control water route.Though it is better than liquid-type thermostat to a certain extent, but its reliability, life-span are all undesirable, make still complexity and manufacture cost height.Characteristics, the present invention according to present thermostat utilize functional material-marmem, it is not high to environmental requirement to design, reliable operation, the life-span is long, cost is low new-type thermostat.

The design's thought is to utilize the characteristics of marmem in the setting temperature distortion, shape-memory alloy wire spring and backspring are placed on the both sides of a dividing plate, when temperature was higher than the deformation temperature of marmem, the shape-memory alloy wire spring expanded, and its compression backspring makes a valve open simultaneously, a valve closing, when low temperature, the deliquescing of shape-memory alloy wire spring, backspring compresses it, the valve of opening is shut, and the former valve of shutting reopens.

Its concrete structure as shown in the figure, Fig. 1, Fig. 2 are for replacing the design of waxtype thermostat, Fig. 3, Fig. 4, Fig. 5 are depicted as the design that can replace the liquid-type thermostat.Their design principle is the same, just structure is slightly different, 1 is that axis, 2 is shell in Fig. 1, thermostat shown in Figure 2, when water temperature is low, shape-memory alloy wire spring 5 is soft, and backspring 6 is compressed the shape-memory alloy wire spring, goes up valve 4 like this and closes, lower valve 3 lifts, and cooling water can only flow away as shown in Figure 1 from the water route under the lower valve.When the water temperature of cooling water exceeded the deformation temperature of shape-memory alloy wire, shape-memory alloy wire spring 5 began to expand.It drives axis 1, and compression backspring 6 drives upper and lower valve and all walks downwards, and at this moment lower valve is blocked the water route under the valve gradually.Last valve 4 is opened gradually, and cooling water finally can not flow away from the water route under the following valve 3 and flow out by last valve, and at this moment water just just can flow back to water pump as shown in Figure 2 through behind the radiator heat-dissipation.When the cooling water temperature step-down, the deformation temperature of low marmem, it will get back to the dress attitude of Fig. 1.Thermostat has just been finished the effect of the flow direction of control water like this.Fig. 3, Fig. 4, Fig. 5 be for replacing the structural representation of liquid-type thermostat, when water temperature is low as shown in Figure 3, shape-memory alloy wire spring deliquescing at this moment, backspring 6 is compressed the shape-memory alloy wire spring.Go up like this that valve 4 is in the state of closing with shell 2 and the side valve door 13 by axis 1 and last valve one because open at side through hole the position, cooling water flows directly into water pump by side through hole and hole outer water channel.When water temperature raises and exceeds the deformation temperature of marmem, shape-memory alloy wire spring 5 begins to expand, it is being with by axis 1 and is going up valve 4, side valve door 13 and lower stop piece 11 make progress together, lower stop piece compression backspring 6 upwards, side valve door 13 can be blocked side through hole 12 at last like this, and the edge of going up valve 4 and shell the path cooling water occurred and can't flow out and can only flow out from last valve from side through hole and make cooling water enter radiator by pipeline, flow into water pump then, its state as shown in Figure 4, wherein upper bracket 8, and lower support frame 10 its structures as shown in Figure 5.After water temperature reduced again, because the deliquescing of shape-memory alloy wire spring, backspring made it be compressed the state shown in Figure 3 that comes back to again.So just finished controlled water flow to effect.

In a word, this different novel thermostat is the novel thermostat that can replace traditional product fully.It has not high to environmental requirement, working stability is reliable, the characteristics of durable in use and lower manufacture cost, be old product can't be obtained.

9 is upper steam vent among the figure, and 7 is sleeve pipe.

Claims (1)

1, a kind of automobile-used thermostat is made of shape-memory alloy wire spring, backspring and shell, is primarily characterized in that:

A. shape-memory alloy wire spring and backspring are enclosed within on the axis, respectively in the both sides of a dividing plate,

B. fixing valve on the axis, making it along with axis moves up and down,

C. the memory alloy wire spring is the expanded by heating formula.

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