CN112041547A - Thermostat assembly with valve balancing to minimize friction between valve structure and housing - Google Patents
Thermostat assembly with valve balancing to minimize friction between valve structure and housing Download PDFInfo
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- CN112041547A CN112041547A CN201980029100.8A CN201980029100A CN112041547A CN 112041547 A CN112041547 A CN 112041547A CN 201980029100 A CN201980029100 A CN 201980029100A CN 112041547 A CN112041547 A CN 112041547A
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- nest
- spring
- valve structure
- thermostat
- housing
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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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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K31/00—Actuating devices; Operating means; Releasing devices
- F16K31/002—Actuating devices; Operating means; Releasing devices actuated by temperature variation
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K31/00—Actuating devices; Operating means; Releasing devices
- F16K31/02—Actuating devices; Operating means; Releasing devices electric; magnetic
- F16K31/025—Actuating devices; Operating means; Releasing devices electric; magnetic actuated by thermo-electric means
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
- G05D23/00—Control of temperature
- G05D23/01—Control of temperature without auxiliary power
- G05D23/02—Control of temperature without auxiliary power with sensing element expanding and contracting in response to changes of temperature
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
- G05D23/00—Control of temperature
- G05D23/01—Control of temperature without auxiliary power
- G05D23/02—Control of temperature without auxiliary power with sensing element expanding and contracting in response to changes of temperature
- G05D23/021—Control of temperature without auxiliary power with sensing element expanding and contracting in response to changes of temperature the sensing element being a non-metallic solid, e.g. elastomer, paste
- G05D23/022—Control of temperature without auxiliary power with sensing element expanding and contracting in response to changes of temperature the sensing element being a non-metallic solid, e.g. elastomer, paste the sensing element being placed within a regulating fluid flow
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Automation & Control Theory (AREA)
- Fluid Mechanics (AREA)
- Temperature-Responsive Valves (AREA)
Abstract
The present invention relates to a thermostat assembly (1) that minimizes friction between the outer surface of the valve structure (20) and the inner surface of the thermostat housing (10) by providing a means of balancing during movement of the valve structure, thereby avoiding the spring (15) element as an undesirable factor that affects the pressure drop and response time of the thermostat. In the present invention, two springs (15) are provided at positions where the valve structure (20) and the housing (10) oppose each other. The two oppositely disposed springs (15) thus allow a balanced displacement of the valve structure (20) throughout the thermostat interior space (10.1), thereby preventing corrosion of the moving surfaces. In addition, the invention provides that the spring (15) element is arranged outside the cooling liquid, thereby preventing the spring (15) element from being an obstacle to the flow of the cooling liquid in the entire thermostat interior space (10.1). Also, here, since there is no direct contact between the spring (15) element and the heat sensitive container (31), the response time of the present invention is short.
Description
Technical Field
The present invention relates to a thermostat assembly that minimizes friction between the outer surface of a tubular valve and the inner surface of a housing by providing dynamic balancing of the valve.
In particular, the present invention relates to a valve structure having minimal friction and minimal coolant leakage as the valve structure moves within the housing by means of two return springs located at all times in the thermostat interior space to provide dynamic balancing of the valve structure.
Background
In internal combustion engines, temperature control of the coolant is critical to maintaining vehicle performance. The temperature of the engine/engine parts in the vehicle can be indirectly controlled by temperature control of the coolant.
Temperature control of the coolant is provided by an engine cooling system in the vehicle. The most important issue in an engine cooling system is the thermostat assembly which determines the flow ratio between the radiator outlet and the bypass outlet from the temperature value of the inlet coolant flowing out of the engine outlet and vice versa (i.e. determines the flow ratio between the radiator outlet and the bypass outlet from the temperature value of the outlet coolant flowing into the engine inlet).
Sensing the temperature of the inlet coolant from the engine outlet is important to determine the operating conditions and cooling requirements of the engine. A wax-based thermal actuator in the thermostat assembly can detect an inlet temperature value through its heat-sensitive receptacle. When the inlet coolant temperature value is lower than the first threshold value, the inlet coolant flowing out of the engine outlet continues to flow from the inlet to the bypass outlet via a bypass circuit including the engine passage, the water pump and the thermostat assembly. At this temperature value below the first threshold value, the thermal actuator is continuously maintained in the fully closed position, so that the valve structure is also continuously maintained in the fully closed position. The valve structure allows coolant to flow from the inlet to the bypass outlet when the thermal actuator is in a fully closed position, while preventing coolant from flowing from the inlet to the radiator outlet by closing only the radiator outlet passage window. When the inlet coolant temperature value is above the first threshold, the waxy material in the temperature sensitive container begins to expand as the temperature of the coolant increases due to heat transfer between the coolant in the thermostat interior space and the wax in the temperature sensitive container. The expansion of the waxy material causes the piston to move forward as directed by the actuator. However, due to the force exerted by the sleeve portion of the actuator on the sleeve seat of the valve structure, forward movement of the piston end is restricted causing the thermal actuator to move rearwardly, and thus the valve structure, to move rearwardly as well. During the rearward movement of the valve structure, the spring element that wraps around the heat sensitive container portion of the thermal actuator is compressed, causing the spring to store potential energy. When the heat sensitive element is in this partially open position, the valve structure allows the coolant to flow from the inlet to the bypass outlet and the radiator outlet. When the inlet coolant temperature value is equal to or greater than the second threshold value, the thermo-element opens to its maximum point (full rearward movement), so that the valve structure also opens to the maximum. When the heat sensitive element is in this fully open position, the valve structure allows the coolant to flow from the inlet to the radiator outlet and prevents the coolant from flowing from the inlet to the bypass outlet by closing only the bypass outlet channel windows. When the inlet coolant temperature value is above the second threshold, inlet coolant from the engine outlet flows from the inlet to the radiator outlet only after passing through a heat exchange circuit including the engine passage, the radiator passage, the water pump, and the thermostat assembly.
When the coolant temperature value from the engine outlet falls below a second threshold, the piston begins to move rearward. The stored potential energy of the spring element is used to move the valve structure towards its first position (fully closed position).
The tubular valve structure is movable back and forth within the thermostat interior space due to a clearance between the outer surface of the valve structure and the inner surface of the thermostat body (housing). However, the gap is provided to be relatively small in order to prevent leakage through the gap. As a result, conventional thermostat assemblies having a tubular valve structure can be susceptible to corrosion occurring on the outer surface of the valve structure and the inner surface of the thermostat body due to unbalanced movement of the valve structure within the thermostat interior space. The presence of the return spring causes the valve element to exhibit unbalanced forward and rearward movement in the thermostat interior space. In addition, since the spring usually wraps the heat sensitive container of the thermal actuator, complete contact between the heat sensitive part and the coolant can be avoided. This results in a reduced heat transfer between the cooling liquid and the wax within the heat sensitive container. Thereby increasing the response time of the thermostat to temperature changes. Also, a spring wrapped around the heat sensitive container of the thermal actuator provides resistance against the flow of coolant. Thus, the spring impedes the flow of coolant through the interior of the thermostat, thereby causing an increase in the pressure drop of the coolant.
Document US2013200167 a1 provides a thermostat assembly comprising a return spring that wraps a heat-sensitive container of an actuator. The return spring can therefore cause unbalanced movement of the valve structure. And the return spring located in the coolant flow path can cause an undesirable pressure drop, thereby reducing the efficiency of the cooling system. In addition, the return spring that wraps the heat sensitive portion of the heat sensitive element is an obstacle to heat transfer between the wax compound and the coolant in the heat sensitive portion.
Document US7302919B2 mentions a solution for preventing leakage of cooling liquid caused by a gap between the valve structure and the thermostat body. Wherein a conventional valve structure and perforated layer are used to provide a seal between the various structures. However, this approach, while addressing the leakage problem, can result in difficult movement of the valve structure throughout the thermostat interior space. Moreover, this is an expensive solution.
Thus, none of the inventions reduces the friction between the outer surface of the valve structure and the inner surface of the thermostat body by controlling the balance of valve movement, thereby preventing the spring element from becoming an undesirable factor that affects the thermostat pressure drop and response time.
Disclosure of Invention
It is an object of the present invention to minimize the friction between the outer surface of the valve structure and the inner surface of the thermostat body by providing a balance of valve motion, thereby preventing the spring element from becoming an undesirable factor affecting the thermostat's pressure drop and response time.
The present invention provides a thermostat assembly comprising: the valve comprises a shell, a valve structure, an actuator, a shell closing part and two springs which are respectively positioned in two oppositely arranged spring nests.
The thermostat assembly provided by the present invention may also have a feature wherein the actuator is a thermal actuator.
The spring seats disposed in opposition described above include:
-two housing spring nests arranged in a direction perpendicular to the inner surface of said housing, with equal spacing from each other;
-two corresponding housing spring seats, parallel to the bottom appendage of said housing spring nest, extending towards the inner space;
-two valve body spring nests arranged in a direction perpendicular to the outer surface of said valve structure, with equal spacing from each other;
two corresponding valve body spring seats, which are parallel top appendages of the above-mentioned valve body spring nest and extend towards the interior space.
The thermostat assembly of the present invention further comprises:
-a bypass nest and a radiator nest arranged on the valve structure;
two closing elements arranged to be adapted to the dimensions of the bypass nest and the radiator nest.
The thermostat assembly of the present invention further comprises:
-a bypass O-ring nest portion disposed on said bypass nest;
-a radiator O-ring nest portion disposed on said radiator nest.
The thermostat assembly of the present invention further includes a closure member O-ring nest portion disposed on an inner surface of the closed circuit passage.
Drawings
FIG. 1 is a side cross-sectional view of a thermostat in a fully closed position and an enlarged partial view of a gap between an outer surface of a valve structure and an inner surface of a thermostat body in an embodiment of the present invention;
FIG. 2a is a side cross-sectional view of a thermostat housing containing a valve structure in a fully open position in an embodiment of the invention;
FIG. 2b is a side cross-sectional view of the thermostat assembly in a fully open position in an embodiment of the present invention;
FIG. 3 is a front cross-sectional view of the thermostat assembly in a fully closed position and a close-up view of the gap between the outer surface of the valve structure and the inner surface of the thermostat body in an embodiment of the present invention;
FIG. 4 is a front cross-sectional view of the thermostat assembly in a fully open position in an embodiment of the present invention;
FIG. 5 is an exploded perspective view of a thermostat assembly in an embodiment of the invention;
fig. 6 is a front cross-sectional view of a thermostat assembly according to a second embodiment of the invention, with the thermal actuator in a fully closed position and coolant flowing only from the inlet to the bypass outlet via the bypass circuit. When the thermal actuator is in a fully closed position, an O-ring element located below the radiator outlet window of the valve surface seals against the radiator outlet passage window;
fig. 7 is a front cross-sectional view of a thermostat assembly according to a second embodiment of the invention, with the thermal actuator in a fully open position and coolant flowing only from the inlet to the radiator outlet via the heat exchange circuit. When this thermal actuator is in the fully open position, an O-ring element located above the radiator outlet window of the valve surface seals against the bypass outlet passage window. Also shown in this figure is an enlarged view of a portion of the valve structure between the thermostat body and the valve structure, where it can be seen that the O-ring element fills the gap to prevent leakage;
fig. 8 is a side sectional view of a thermostat assembly in a second embodiment of the invention. As shown in the drawing, two spring elements are used in the second embodiment;
FIG. 9 is an exploded perspective view of a thermostat assembly in a second embodiment of the invention;
FIG. 10 is a schematic view of a conventional thermostat assembly having a single spring encasing a heat sensitive container in an actuator.
1 thermostat assembly
10 casing
10.1. Thermostat interior space
11 inlet
12 bypass outlet
12.1. Bypass outlet passage window
13 radiator outlet
13.1 radiator outlet passage window
14 casing spring nest
14.1. Casing spring seat
15 spring
20 valve structure
21. -valve inlet
22 bypass outlet window of valve body
23 valve body radiator outlet window
24 bypass nest
24.1. Bypass O-shaped ring nest
25 radiator nest
25.1. O-shaped ring nest of radiator
26. -O-ring
27 closure
27.1. O-shaped ring nest of closing part
28 sleeve base
29 valve body spring nest
29.1. Valve spring seat
30 thermal actuator
31 Heat sensitive container
32 piston
33 Sleeve
40 casing end cover
41 piston seat
50 gap
Detailed Description
The present invention relates to a thermostat assembly (1) that minimizes friction between the outer surface of the valve structure and the inner surface of the thermostat body by providing a balance of valve motion, thereby preventing the spring element from becoming an undesirable factor that affects thermostat pressure drop and response time.
The purpose of the engine cooling system is to maintain the temperature of the engine within a suitable temperature range during cruising. The efficiency of a vehicle engine is directly related to the cooling performance of the cooling system of the vehicle. It is important to remove excess heat build-up on the engine and engine components. The most important component of the cooling system is the thermostat assembly (1), which thermostat assembly (1) can judge the cooling need on the basis of the temperature value of the engine coolant coming from the inlet (11) of the engine channel. The temperature value of the coolant flowing out is detected by a heat sensitive container (31) part of a heat actuator (30) located in the inner space of the thermostat.
The thermostat assembly (1) requires a micrometer-sized gap (50) (acceptable leakage) between the outer surface of the valve structure (20) and the inner surface of the housing (10) for the valve structure (20) to be guided by the thermal actuator (30) within the thermostat interior space (10.1), although the gap (50) is not preferred for its sealing properties. Conventional thermostat assemblies having a single spring that encases a heat sensitive container in the actuator can cause corrosion of the interior surface of the housing due to unbalanced movement of the valve structure throughout the interior volume of the thermostat. The presence of corrosion means that the gap becomes progressively larger, and the amount of leakage begins to exceed acceptable levels. In addition, in conventional thermostat assemblies of this type, the spring portion that surrounds the heat sensitive container blocks heat transfer between the coolant from the inlet and the wax compound located within the heat sensitive container. This results in an increase in the response time of the thermostat assembly, which in turn causes a decrease in the cooling performance of the thermostat assembly. Moreover, the spring element located at the center position of the valve element blocks the flow of the cooling liquid. This results in an increased pressure drop of the cooling fluid through the inner space of the thermostat, which in turn reduces the efficiency of the cooling system.
The thermostat assembly (1) provided in this embodiment includes a housing having an inlet (11)Casing (10)A bypass outlet (12), a radiator outlet (13), two housing spring nests (14) and corresponding two housing spring seats (14.1), having a valve inlet (21)Valve structure (20)A valve body bypass outlet window (22), a valve body radiator outlet window (23), a sleeve seat (28), two valve body spring nests (29), two corresponding valve body spring seats (29.1) and a spring nest arranged between the housing spring nest (14) and the valve body spring nestTwo springs (15)Actuator, having a piston seat (41) portionShell end cap (40)。
In this embodiment, various actuators may be used, such as electric actuators, thermal actuators, wax-based thermal actuators, and the like. In a preferred embodiment of the present invention, the actuator is a thermal actuator (30). The thermal actuator (30) has a heat-sensitive container (31), a piston (32), and a sleeve (33) portion.
In order to avoid the problems caused by the application of the single spring, the two springs (15) are arranged at opposite positions and between the valve structure (20) and the housing (10). The two opposing springs (15) thus avoid the formation of corrosion on the moving surfaces by allowing a balanced movement of the valve structure (20) within the thermostat interior space (10.1).
As shown in fig. 2a, the housing (10) has two housing spring nests (14) arranged vertically on the inner surface of the housing with equal spacing and a corresponding housing spring seat (14.1) as a horizontal bottom attachment, which housing spring seat (14.1) extends towards the housing interior. The valve structure (20) has two valve body spring nests (29) arranged vertically on the outer surface of the valve structure with equal clearance and a corresponding valve body spring seat (29.1) as a horizontal top attachment, which valve body spring seat (29.1) extends towards the housing interior space. Each housing spring nest (14) coincides with a corresponding valve body spring nest (29). Therefore, the housing spring nest (14), the corresponding housing spring seat (14.1), the valve body spring nest (29) and the corresponding valve body spring seat (29.1) are matched to form the spring nest. In a preferred embodiment of the invention, each spring nest is opposite to each other, arranged in the middle of the channel between the bypass outlet (12) and the radiator outlet (13).
Fig. 1 shows a side sectional view of the thermostat assembly (1) in a fully closed position. The oppositely disposed spring nest and the oppositely disposed springs (15) can be seen. In addition, the enlarged view shows the clearance (50) between the inner surface of the housing (10) and the outer surface of the valve body spring seat (29.1). The presence of the gap (50) allows the valve structure (20) to move forward and backward in the thermostat interior space (10.1).
Fig. 2a shows a valve structure (20) within a housing (10) that does not contain other components within the thermostat. The thermostat is now in a fully closed position which only allows coolant to flow through the bypass circuit. As shown in this figure, the bypass outlet passage window (12.1) on the side of the housing (10) coincides with the valve body bypass outlet window (22) on the side of the valve structure (20) when the thermostat is in the fully closed position. Fig. 3 shows a front sectional view of the thermostat in the fully closed position, in which view it can be seen that the bypass outlet channel window (12.1) coincides with the valve body bypass outlet window (22). As shown in fig. 3, when the thermostat is in the fully closed position, the radiator outlet passage window (13.1) located at the side of the housing (10) does not coincide with the valve body radiator outlet window (23) located at the side of the valve structure (20). Therefore, during the period in which the temperature of the coolant entering from the engine outlet via the inlet (11) is lower than the first threshold value, the inflowing coolant flows only from the inlet (11) to the bypass outlet (12).
Fig. 2b shows a side sectional view of the thermostat assembly (1) of the invention in a fully open position. This fully open position of the thermostat only allows the coolant to flow through the entire heat exchange circuit. As shown, the bypass outlet passage window (12.1) located to the side of the housing (10) is not coincident with the valve body bypass outlet window (22) located to the side of the valve structure (20) when the thermostat is in the fully open position. As shown in the front sectional view of the thermostat in the fully open position shown in fig. 4, the radiator outlet passage window (13.1) at the side of the housing (10) coincides with the valve body radiator outlet window (23) at the side of the valve structure (20) when the thermostat is in the fully open position. Therefore, during the period in which the temperature of the coolant entering from the engine outlet via the inlet (11) is greater than or equal to the second threshold value, the inflowing coolant flows only from the inlet (11) to the radiator outlet (13).
During the change of position of the valve structure (20) from fully closed to fully open, oppositely disposed springs (15) nested in oppositely disposed spring nests are compressed. Thereby causing the oppositely disposed springs (15) to store potential energy. During the change of the position of the valve structure (20) from the fully open to the fully closed position, the potential energy stored by the spring (15) drives the valve structure (20) to move to the fully closed position by pushing the valve structure (20) from below the valve body spring seat (29.1).
Fig. 10 shows a conventional thermostat assembly having only a single spring encasing a heat sensitive container portion. Unlike conventional thermostat assemblies having only a single spring encasing a heat sensitive container portion, the present invention provides for balancing the valve structure (20) during movement by embedding two oppositely disposed springs in opposing spring nests. Thus, the valve structure movement balance provided by the present invention can prevent contact between the inner surface of the housing (10) and the outer surface of the valve structure (20) by preserving the above-mentioned gap (50) during movement of the valve structure. Thus, the present invention controls the leakage amount within an acceptable range by preventing the formation of corrosion (increase in the size of the gap) across the moving surface. In addition, unlike conventional thermostat assemblies having only a single spring encasing a heat sensitive container portion, the present invention avoids the spring (15) element from being an obstacle to the flow of coolant in the thermostat interior space (10.1) by locating the spring (15) outside the coolant. Thus, the oppositely disposed springs (15) disposed outside the valve structure (20) do not become a negative factor in the pressure drop and efficiency of the cooling system. Also, unlike conventional thermostat assemblies having only a single spring encasing a heat sensitive reservoir portion, the present invention avoids the spring (15) element as an obstruction to heat transfer between wax compounds in the heat sensitive reservoir (31) in the thermal actuator (30) and coolant flowing from the engine outlet into the inlet (11). The present invention provides a short response time (i.e. high cooling performance) due to the absence of direct contact between the spring (15) element and the heat sensitive container (31), as opposed to the direct contact between the spring and the heat sensitive container in conventional thermostat assemblies. Fig. 5 shows an exploded perspective view of a thermostat assembly in a first embodiment.
Fig. 9 shows an exploded perspective view of a thermostat assembly in a second embodiment. The thermostat assembly (1) in the second embodiment described above comprises a valve structure (20) which, during the fully closed position and the fully open position, respectively, of the thermal actuator (30), due to its part exhibiting spring characteristics compared to the bypass outlet passage window (12.1) and the radiator outlet passage window (13.1), makes the valve structure (20) seal the bypass outlet passage window (12.1) and the radiator outlet passage window (13.1) by compensating for a gap (50) between an outer surface of the valve structure (20) and an inner surface of the housing (10). Therefore, the sealing property can be ensured while the gap (50) is maintained.
The thermostat assembly (1) in the second embodiment described above includes: a housing (10) having an inlet (11), a bypass outlet (12), a radiator outlet (13), two housing spring nest (14) sections, two springs (15), a valve structure (20) having a valve inlet (21), a valve body bypass outlet window (22), a valve body radiator outlet window (23), a bypass nest (24), a bypass O-ring nest (24.1), a radiator nest (25), a radiator O-ring nest (25.1), a sleeve seat (28), two valve body spring nests (29), two O-rings (26), two closures (27) having closure O-ring nests (27.1), a thermal actuator (40) having a heat sensitive container (31), a piston (32), a sleeve (33) section, and a housing end cap (40) having a piston seat (41) section.
The thermostat assembly (1) in the second embodiment allows the heat-sensitive container (31) of the thermal actuator (30) to detect the true value of the engine coolant by preventing leakage occurring between the valve structure (20) and the housing (10) due to the portion thereof exhibiting spring characteristics compared to the bypass outlet passage window (12.1) and the radiator outlet passage window (13.1) when the thermal actuator (30) is in the fully closed position and the fully open position, respectively, thereby allowing proper temperature control of the engine cooling system.
A valve structure (20) according to a second embodiment of the present invention includes: a bypass nest (24), a radiator nest (25), a radiator O-ring nest (25.1), two O-rings (26), two closures (27) with closure O-ring nests (27.1) and valve inlets (21), a valve body bypass outlet window (22), a valve body radiator outlet window (23), a sleeve seat (28) and two valve body spring nests (29). The bypass nest (24) is disposed above the valve body bypass outlet window (22), and the radiator nest (25) is disposed below the valve body radiator outlet window (23). The positions of these nests are adjusted according to the sealing requirements of the thermostat assembly (1) in the fully closed position and in the fully open position. In order to provide a convenient shielding for the O-ring (26), the bypass O-ring nest (24.1) and the radiator O-ring nest (25.1) are respectively arranged in the bypass nest (24) and the radiator nest (25). Likewise, the closure (27) provided in a form which facilitates the bypass nest (24) and the radiator O-ring nest (25) has a closure O-ring nest (27.1) formed by the superposition of the bypass O-ring nest (24.1) and the radiator O-ring nest (25.1). The O-ring (26) is embedded in the bypass O-ring nest (24.1) and the radiator O-ring nest (25.1). Then, the closing member (27) is inserted between the O-rings (26) to close the bypass nest (24) and the radiator nest (25).
Similarly, the top of the valve structure (20) of the second embodiment of the invention also has the sleeve seat (28), and the sleeve (33) of the thermal actuator (30) is partially arranged on the sleeve seat (28). Due to the above-mentioned shape of the sleeve seat (28), the valve structure (20) can be guided by the backward movement of the heat-sensitive container (31) of the thermal actuator (30) when the thermostat assembly (1) changes from the fully closed position to the fully open position. Thus, rearward movement of the thermal actuator (30) causes rearward movement of the valve structure. Vice versa, when the thermostat assembly (1) changes from the fully closed position to the fully open position, the spring (15) embedded in the valve body spring nest (29) can return the valve structure (20) to its initial position.
In the second embodiment of the invention, the gap (50) between the outer surface of the valve structure (20) and the inner surface of the housing (10) is eliminated at the bypass outlet passage window (12.1) due to the resilient feature formed by the insertion of an O-ring (26) between the bypass O-ring nest (24.1) of the bypass nest (24) and the closure O-ring nest (27.1) of the closure (27). Thus, when the thermostat is in the fully open position, only the gap (50) at the bypass outlet passage window (12.1) is eliminated, preventing leakage of cooling liquid from the thermostat interior space to the bypass outlet (12). In fig. 7, it can be seen how the gap (50) at the bypass outlet passage window (12.1) is partially eliminated by the above-mentioned resilient feature, while the portion of the gap (50) located between the valve structure (20) and the housing (10) still allows the valve structure (20) to move.
In the second embodiment shown in fig. 6, in which the thermostat assembly (1) is in the fully closed position, the gap (50) between the outer surface of the valve structure (20) and the inner surface of the housing (10) is eliminated at the radiator outlet passage window (13.1) due to the resilient feature formed by the insertion of an O-ring (26) between the radiator O-ring nest (25.1) of the radiator nest (25) and the closure O-ring nest (27.1) of the closure (27). Thus, when the thermostat is in the fully closed position, only the gap (50) at the radiator outlet passage window (13.1) is eliminated, preventing leakage of coolant from the thermostat interior space to the radiator outlet (13).
In fig. 8 a side sectional view of the thermostat assembly (1) in a second embodiment is shown. The sectional view corresponds to a fully closed position of the thermal actuator (30), that is to say, of the thermostat assembly (1). As shown, the cooling fluid flows only from the inlet (11) to the bypass outlet (12). At this time, since an elastic feature is formed by inserting an O-ring (26) between the radiator O-ring nest (25.1) of the radiator nest (25) and the closure O-ring nest (27.1) of the closure (27), a gap (50) between the outer surface of the valve structure (20) and the inner surface of the housing (10) is eliminated at the radiator outlet passage window (13.1). Thus, when the thermostat is in the fully closed position, only the gap (50) at the radiator outlet passage window (13.1) is eliminated, preventing leakage of coolant from the thermostat interior space to the radiator outlet (13).
In fig. 9 an exploded perspective view of the thermostat assembly (1) of the second embodiment is shown. Firstly, the bypass O-ring nest (24.1) and the radiator O-ring nest (25.1) are embedded with O-rings (26), and then a closed-circuit channel is inserted between the bypass O-ring nest and the radiator O-ring nest. After the valve structure (20) is installed, the valve structure (20) is locked by a spring (15) located in an inner space formed by the housing (10) and the valve structure (20) so that the valve structure (20) is embedded in the inner space of the housing (10). Then, the thermal actuator (30) is inserted on the top end portion of the housing (20), that is, the sleeve (33) portion of the thermal actuator (30) is disposed on the sleeve seat (28), the sleeve seat (28) being disposed on the valve structure (20). Finally, the housing end cap (40) with the piston seat (41) is mounted on the housing (10) so that the other components are retained inside the thermostat. The end of the piston (32) is arranged in the piston seat (41), which piston seat (41) is present in the form of a complete component of the thermostat assembly (1). The heat sensitive container (31) of the thermal actuator (30) is partially moved rearwardly due to the forward movement of the piston (32) being prevented by the piston seat (41), thereby causing the valve structure (20) to move rearwardly while the thermal actuator (30) changes from the fully closed position to the fully open position.
Claims (7)
1. A thermostat assembly (1) comprising:
a housing (10);
a valve structure (20);
an actuator;
a housing end cap (40);
it is characterized by also comprising:
two spring (15) elements located in two oppositely arranged spring nests.
2. A thermostat assembly (1) according to claim 1,
the opposing spring nests have:
two housing spring nests (14) arranged in a direction perpendicular to the inner surface of the housing (10) with equal spacing from each other,
two corresponding housing spring seats (14.1) which are parallel bottom attachments of the housing spring nest (14) and extend towards the interior space,
two valve structure spring nests (15) arranged in a direction perpendicular to the outer surface of the valve structure (20) with equal spacing from each other,
two corresponding valve structure spring seats (15.1) are parallel top appendages of the valve structure spring nest (15) and extend towards the interior space.
3. A thermostat assembly (1) according to claim 1 or 2, characterized by further comprising:
a bypass nest (24) and a radiator nest (25) arranged on the valve structure (20);
two closing elements (27) adapted to the dimensions of the bypass nest (24) and the radiator nest (25).
4. A thermostat assembly (1) according to claim 3, further comprising:
a bypass O-ring nest (24.1) portion arranged on the bypass nest (24),
and the part of the radiator O-shaped ring nest (25.1) is arranged on the radiator nest (25).
5. The thermostat assembly (1) according to claim 4, further comprising:
and a closure O-ring nest (27.1) portion disposed on an inner surface of the closure (27).
6. A thermostat assembly (1) according to any one of claims 3-5, characterized by further comprising:
two O-rings (26) embedded in the bypass O-ring nest (24.1) and the radiator O-ring nest (25.1) and closed by the closure (27) located within the closure O-ring nest (27.1).
7. A thermostat assembly (1) according to any one of claims 1-6, characterized in that:
the actuator is a thermal actuator (30).
Applications Claiming Priority (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| TR2018/06754 | 2018-05-14 | ||
| TR201806754 | 2018-05-14 | ||
| TR2019/05307 | 2019-04-09 | ||
| TR2019/05307A TR201905307A1 (en) | 2019-04-09 | 2019-04-09 | THERMOSTAT ASSEMBLY THAT MINIMIZES FRICTION BETWEEN VALVE AND BODY BY BALANCING VALVE MOVEMENT |
| PCT/TR2019/050303 WO2019245508A2 (en) | 2018-05-14 | 2019-05-08 | Thermostat assembly minimizing friction between valve and frame by providing balance of valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112041547A true CN112041547A (en) | 2020-12-04 |
Family
ID=68982757
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201980029100.8A Pending CN112041547A (en) | 2018-05-14 | 2019-05-08 | Thermostat assembly with valve balancing to minimize friction between valve structure and housing |
Country Status (6)
| Country | Link |
|---|---|
| CN (1) | CN112041547A (en) |
| CZ (1) | CZ2020618A3 (en) |
| DE (1) | DE112019002478T5 (en) |
| HU (1) | HUP2000429A1 (en) |
| IL (1) | IL277922A (en) |
| WO (1) | WO2019245508A2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TR201914833A2 (en) * | 2019-09-30 | 2021-04-21 | Kirpart Otomotiv Parcalari Sanayi Ve Ticaret A S | A THERMOSTAT DEVICE THAT PROVIDES CONSTANT OUTPUT TEMPERATURE BY AUTONOMOUS ADJUSTING THE MIXING RATIO |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2930276A1 (en) * | 1979-07-26 | 1981-02-05 | Grohe Armaturen Friedrich | Thermostatically controlled mixer valve - uses two bimetallic spring washer stacks and double taper valve piston |
| DE4009949A1 (en) * | 1990-03-28 | 1991-10-02 | Behr Thomson Dehnstoffregler | Thermostat valve regulator for vehicle IC engine - has expanding capsule moving slide to displace valve pin |
| CN1247273A (en) * | 1998-09-07 | 2000-03-15 | 久世义一 | Electronic controlled cooling system of automotive engine for preventing global from becoming warm |
| WO2005068799A1 (en) * | 2004-01-16 | 2005-07-28 | Itw Automotive Products Gmbh & Co. Kg | Thermostat valve arrangement |
| CN1697946A (en) * | 2003-04-04 | 2005-11-16 | 日本恒温装置株式会社 | Thermostat |
| EP2104015A2 (en) * | 2008-03-17 | 2009-09-23 | Behr Thermot-tronik GmbH | Thermostatic valve with integrated bypass valve |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100482868B1 (en) * | 2001-08-23 | 2005-04-14 | 현대자동차주식회사 | Thermostat for shortening warm up time |
-
2019
- 2019-05-08 CN CN201980029100.8A patent/CN112041547A/en active Pending
- 2019-05-08 CZ CZ2020618A patent/CZ2020618A3/en unknown
- 2019-05-08 DE DE112019002478.7T patent/DE112019002478T5/en active Granted
- 2019-05-08 WO PCT/TR2019/050303 patent/WO2019245508A2/en active Application Filing
- 2019-05-08 HU HU2000429A patent/HUP2000429A1/en unknown
-
2020
- 2020-10-11 IL IL277922A patent/IL277922A/en unknown
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2930276A1 (en) * | 1979-07-26 | 1981-02-05 | Grohe Armaturen Friedrich | Thermostatically controlled mixer valve - uses two bimetallic spring washer stacks and double taper valve piston |
| DE4009949A1 (en) * | 1990-03-28 | 1991-10-02 | Behr Thomson Dehnstoffregler | Thermostat valve regulator for vehicle IC engine - has expanding capsule moving slide to displace valve pin |
| CN1247273A (en) * | 1998-09-07 | 2000-03-15 | 久世义一 | Electronic controlled cooling system of automotive engine for preventing global from becoming warm |
| CN1697946A (en) * | 2003-04-04 | 2005-11-16 | 日本恒温装置株式会社 | Thermostat |
| WO2005068799A1 (en) * | 2004-01-16 | 2005-07-28 | Itw Automotive Products Gmbh & Co. Kg | Thermostat valve arrangement |
| EP2104015A2 (en) * | 2008-03-17 | 2009-09-23 | Behr Thermot-tronik GmbH | Thermostatic valve with integrated bypass valve |
Also Published As
| Publication number | Publication date |
|---|---|
| IL277922A (en) | 2020-11-30 |
| CZ2020618A3 (en) | 2021-04-14 |
| HUP2000429A1 (en) | 2021-03-29 |
| WO2019245508A3 (en) | 2020-03-19 |
| WO2019245508A2 (en) | 2019-12-26 |
| DE112019002478T5 (en) | 2021-02-25 |
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