Thermostat

Abstract

The thermostat comprises an upper frame and a lower frame, and the upper frame is connected with the lower frame. The exhaust mechanism comprises a gas channel and a floating assembly used for opening or blocking the gas channel, the floating assembly comprises at least two floating ball structures which are in linkage with each other, one floating ball is used for blocking the exhaust hole, the other floating balls are located in the cooling liquid area and driven to act through buoyancy, and therefore cooling liquid exhaust and sealing switching is achieved; a control mechanism including a main valve and a bypass valve provided to open and close the radiator-side outlet and the bypass outlet, respectively, and to control the flow rate; the two pressure sensors are arranged on the two guide rods respectively, located above the large floating balls and used for detecting pressure signals of the large floating balls on the two sides. By means of the linkage structure of the large floating ball and the small floating ball, the exhaust efficiency is improved, the floating balls can be prevented from blocking gas exhaust, and the sealing performance of plugging is improved while it is guaranteed that cooling liquid is exhausted smoothly.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of engines, and particularly relates to a thermostat. BACKGROUND

[0002] The thermostat is an automatic temperature regulating device, and its main function is to control the circulation path of the engine coolant, so as to ensure that the engine operates at an appropriate temperature. Specifically, the thermostat changes the circulation range of the coolant by adjusting the coolant flow entering the radiator, so as to adjust the heat dissipation capacity of the cooling system. When the engine is cold started, the thermostat is closed, and the coolant forms a small circulation in the engine, which helps the engine to quickly warm up; when the engine reaches the normal working temperature, the thermostat is opened, and the coolant starts to flow through the radiator for large circulation, so as to effectively dissipate heat and prevent the engine from overheating. Since the coolant in the pipeline may entrain gas, the gas will affect the flow of the coolant, thereby reducing the cooling efficiency of the thermostat on the engine, and even causing local overheating, so the exhaust structure is usually provided on the thermostat.

[0003] In the prior art, the exhaust structure mostly utilizes the buoyancy of the floating ball to realize automatic plugging, for example, in CN223177625U, the first gas pipe is sleeved with the second gas pipe, the floating ball is arranged in the first gas pipe, the gas enters the first gas pipe when the coolant flows and is discharged through the exhaust hole, and when the gas is exhausted, the floating ball floats to plug the exhaust hole, so as to realize exhaust and prevent coolant leakage; for example, in CN222184920U, the rolling body is movably arranged in the exhaust passage and can be moved to different positions under the action of gravity or water pressure, so as to form a gap to discharge the gas when exhaust is needed, and to block the passage when the coolant circulates, thereby effectively improving the error prevention level.

[0004] However, the existing exhaust structure still has some problems. First, the existing exhaust mechanism only relies on the gravity and buoyancy of the floating ball or the rolling body to realize opening and closing, and the plugging effect depends on the flow state of the coolant, so the sealing reliability is limited, and problems such as incomplete exhaust or incomplete plugging are prone to occur. Secondly, the floating ball is located in the exhaust passage, which itself will hinder the gas discharge path, thereby affecting the exhaust efficiency. In addition, the existing structure mostly lacks feedback capability for the exhaust state, and cannot judge whether the exhaust is completed or not, nor can it issue a prompt or take a linkage measure in abnormal conditions (such as floating ball jamming, poor exhaust), so the exhaust effect and working stability of the thermostat still need to be improved in long-term operation or complex working conditions. SUMMARY

[0005] In view of the problems in the prior art, the present application provides a thermostat with an exhaust structure, which improves the exhaust efficiency through a floating assembly, avoids the hindrance of the floating ball itself to the gas discharge, and improves the sealing performance while ensuring smooth exhaust of the coolant.

[0006] To achieve the above object, the technical scheme of the present application is as follows: A thermostat comprises: An upper frame; A lower frame connected with the upper frame; An exhaust mechanism comprising a gas passage and a floating assembly for opening or blocking the gas passage, the gas passage being an exhaust hole arranged on one side of the upper frame, the floating assembly comprising at least two ball structures connected with each other, one of which is used to block the exhaust hole, and the other is located in the cooling liquid area and is driven to move by the buoyancy, so as to realize the switching between the exhaust and sealing of the cooling liquid; A control mechanism comprising a main valve and a bypass valve arranged to open and close the radiator side outlet and the bypass outlet respectively and control the flow, the main valve being arranged to close the radiator side outlet when abutting against the bottom of the upper frame; A fixed arm symmetrically arranged below the upper frame, the fixed arm being used to fix the lower frame and the control mechanism.

[0007] Preferably, the floating assembly comprises a horn air pipe, a small ball and two large balls, the horn air pipe being arranged below the side of the upper frame and being communicated with the exhaust hole, the small ball being located in the horn air pipe, and the two large balls being symmetrically arranged outside the horn air pipe, the small ball being connected with the large balls arranged on both sides through a connecting rod, the large ball being sleeved on a guide rod and being movable up and down along the guide rod, when the large ball moves up and down, the small ball is driven to move up and down, and the opening of the horn air pipe and the exhaust hole is blocked and released, the inner diameter of the exhaust hole being smaller than the diameter of the small ball, the guide rod being arranged along the vertical central axis of the large ball, the upper end of the guide rod being fixed to the upper frame, and the lower end of the guide rod being provided with a limiting piece for limiting the up and down stroke of the large ball.

[0008] Preferably, two pressure sensors are further arranged on the guide rods above the large balls, respectively, for detecting the pressure signals of the large balls on both sides, when the pressure sensors detect the pressure signals applied by the large balls, the control mechanism is sent a control signal for adjusting the response speed of the control mechanism to realize the control logic of exhausting first and then adjusting the temperature when judging that the exhaust is completed, and when the pressure signals on both sides are inconsistent, a fault alarm is triggered.

[0009] Preferably, the control mechanism comprises a piston part, the piston part being driven to move by the volume change of an internal medium, when the pressure sensor detects the exhaust completion state, a mechanical limiting mechanism or a hydraulic damping mechanism is triggered to release, so that the internal medium can drive the main valve to open the full stroke, thereby realizing the control logic of exhausting first and then adjusting the temperature in the physical structure.

[0010] Preferably, the inner medium of the piston part is paraffin wax, which expands when heated to push the push rod to drive the main valve and the bypass valve to act.

[0011] Preferably, the main valve and the bypass valve are reset by a main valve spring and a bypass valve spring, the main valve spring is located between the main valve and the lower frame, one end of the main valve spring abuts against the main valve, and the other end of the main valve spring abuts against the lower frame; the bypass valve spring is located between the lower frame and the bypass valve, one end of the bypass valve spring abuts against the lower frame, and the other end of the bypass valve spring abuts against the bypass valve.

[0012] Preferably, the control mechanism is an electronic temperature control valve, and the signal output by the pressure sensor is processed by a controller and used to adjust the opening rate or opening limit of the electronic temperature control valve.

[0013] Preferably, the small floating ball is made of a dense wear-resistant material, and an elastic sealing layer is arranged on the surface of the small floating ball to enhance the plugging effect on the exhaust hole; the large floating ball is made of a light hollow structural material to provide sufficient buoyancy and maintain stable operation in the high-temperature cooling liquid.

[0014] Preferably, the side wall of the horn air pipe is provided with an axially extending guide groove, the connecting rod passes through the guide groove and extends out of the horn air pipe to be connected with the two large floating balls, so as to ensure that the connecting rod can move synchronously during the up-down movement of the large floating balls.

[0015] Preferably, the lower part of the horn air pipe is flared to abut against and limit the large floating ball.

[0016] The present application has the following beneficial effects: (1) Compared with the prior art, the present application has significant advantages in the exhaust performance. Through the arrangement of the floating assembly, the direct obstruction of the single floating ball to the gas flow during exhaust can be avoided, so that the exhaust of the gas in the cooling liquid is more smooth. The large floating ball can provide greater buoyancy, and the buoyancy acts on the small floating ball through the connecting rod, so that the small floating ball is more closely attached when plugging the exhaust hole, thereby improving the sealing effect of plugging. At the same time, the elastic sealing layer is arranged on the surface of the small floating ball, which further improves the sealing property when plugging the exhaust hole by floating up, and prevents the leakage of the cooling liquid. In addition, the lower part of the horn air pipe is designed to be flared, and the floating ball can be located in the flared part under the action of gravity during the exhaust process, so as not to obstruct the gas exhaust passage, and to ensure the smoothness of the exhaust process, and the guide groove structure of the horn air pipe ensures the stable movement of the floating ball and the connecting rod, thereby further improving the efficiency and reliability of the exhaust process.

[0017] (2) In the control and safety aspects, the present application realizes real-time monitoring and feedback of the exhaust state by setting a pressure sensor on the guide rod, ensures the control logic of "exhausting first and then adjusting temperature", and effectively avoids the temperature control lag caused by air resistance. At the same time, by comparing the pressure signals of the two large floating balls, when there is inconsistency, an alarm can be triggered to identify faults such as jamming, tilting or uneven exhaust, significantly improving the safety and reliability of the system. In addition, the control mechanism can use either a paraffin expansion structure or an electronic temperature control valve structure. The former can adjust the rhythm of valve opening through mechanical limiting or hydraulic damping, and the latter can accurately adjust the opening rate or limit value by the controller, ensuring the flexibility and compatibility of the system under different working conditions.

[0018] (3) The overall structure of the present application is compact and reasonable, and the cooperation of the guide rod, the limiting piece, the connecting rod and the horn air pipe ensures the smooth movement and stable operation of the floating ball. The large floating ball is made of light hollow material, and the small floating ball is made of dense wear-resistant material, both of which can work stably for a long time in a high-temperature cooling liquid environment, significantly prolonging the service life of the thermostat. Without significantly increasing the number of components, the present application simultaneously realizes multiple functions such as efficient exhaust, reliable sealing, monitoring and feedback, intelligent linkage, etc., and has strong practical value and promotion significance. BRIEF DESCRIPTION OF DRAWINGS

[0019] One or more embodiments are illustrated by way of example with reference to the accompanying drawings, which are schematic and not intended to be limiting of the embodiments, and in which like reference numerals refer to like elements in the drawings and in which: the drawings do not limit the proportion.

[0020] Figure 1 The structure schematic diagram of the thermostat shown in the embodiment of the present application; Figure 2 The top view of the thermostat shown in the embodiment of the present application; Figure 3 Another angle structure schematic diagram of the thermostat shown in the embodiment of the present application; Figure 4 The exhaust structure schematic diagram shown in the embodiment of the present application; Figure 5 The state schematic diagram of the release exhaust hole of the exhaust structure shown in the embodiment of the present application; Figure 6 The state schematic diagram of the plugging exhaust hole of the exhaust structure shown in the embodiment of the present application; Reference numerals: 1 - upper frame; 2 - lower frame; 3 - exhaust mechanism; 31 - trumpet air pipe; 32 - small float ball; 33 - large float ball; 34 - exhaust hole; 35 - connecting rod; 36 - guide rod; 37 - limiting piece; 38 - guide slot; 4 - control mechanism; 41 - main valve; 42 - bypass valve; 43 - piston part; 44 - main valve spring; 45 - bypass valve spring; 5 - fixed arm; 6 - pressure sensor. DETAILED DESCRIPTION

[0021] For the purpose of promoting the understanding of the present application, the present application will be described in greater detail below with reference to the drawings and specific embodiments. It should be noted that when an element is referred to as being "fixed to" another element, it can be directly on the other element or one or more intervening elements can be present therebetween. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or one or more intervening elements can be present therebetween. The terms "vertical", "horizontal", "left", "right", "inner", "outer" and similar terms used in the description are for the purpose of illustration only. In the description of the present application, the terms "first", "second" are used only for the purpose of description and should not be construed as indicating relative importance or implying the number of the technical features indicated. Thus, unless otherwise specified, the features defined with "first", "second" can explicitly or implicitly include one or more of the features; the meaning of "plurality" is two or more. The term "include" and any variation thereof means non-exclusive inclusion, and one or more other features, integers, steps, operations, units, components and / or combinations thereof can be present or added.

[0022] In addition, unless otherwise explicitly specified and limited, the terms "mount", "connect", "connection" should be understood broadly, for example, it can be fixed connection, or detachable connection, or integrally connected; it can be mechanical connection, or electrical connection; it can be directly connected, or indirectly connected through intermediate medium, or internal communication of two elements. All technical and scientific terms used in the specification have the same meaning as understood by the person skilled in the art to which the present application belongs. The terms used in the specification of the present application are only for the purpose of describing the specific embodiments and are not used to limit the present application. The term "and / or" used in the specification includes any and all combinations of one or more related listed items.

[0023] In addition, the technical features involved in the different embodiments of the present application described below can be combined with each other as long as there is no conflict.

[0024] Please refer to Figures 1-6 The embodiment discloses a thermostat, comprising: The upper frame 1 and the lower frame 2, the upper frame 1 as the main support part of the thermostat, is located in the upper part of the device, plays a role in fixing and installing other components, the upper frame 1 is connected with the lower frame 2, the lower frame 2 as the bottom frame, supports the operation of the whole thermostat, so that the valve and other components can work stably.

[0025] The exhaust mechanism 3, the exhaust mechanism 3 includes a gas passage and a floating assembly for opening or blocking the gas passage. The gas passage is an exhaust hole 34 arranged on one side of the upper frame 1, and the floating assembly includes at least two ball structures that are connected to each other, one of which is used to block the exhaust hole 34, and the other is located in the cooling liquid area and is driven to move by buoyancy, so as to realize the switching of cooling liquid exhaust and sealing. The structure design of the exhaust mechanism 3 enables the exhaust hole 34 to be automatically opened and closed under different liquid level conditions. When the cooling liquid level rises, the ball in the cooling liquid area is lifted by the buoyancy and drives the other ball to move towards the exhaust hole 34, so that the exhaust hole 34 is sealed and the exhaust is stopped. Through the linkage of two or more balls, the exhaust process is smooth and the sealing is reliable, avoiding the problem of single ball shaking or noise caused by air flow impact, significantly improving the exhaust stability and sealing life.

[0026] The control mechanism 4 includes a main valve 41 and a bypass valve 42. The main valve 41 and the bypass valve 42 are arranged to open and close the radiator side outlet and the bypass outlet respectively and control the flow. The main valve 41 closes the radiator side outlet when it is in abutment with the bottom of the upper frame 1. The control mechanism 4 can use a paraffin driven piston part 43 to drive the valve body to move, or use an electronic temperature control method to achieve precise control. In the paraffin expansion driving form, the paraffin is heated and expanded to push the push rod to move, and then drive the main valve 41 and the bypass valve 42 to open and close, and reset through the main valve spring 44 and the bypass valve spring 45. In the electronic temperature control form, the controller can adjust the opening rate or limit value of the main valve 41 and the bypass valve 42 according to the sensing signal, to realize more flexible temperature control logic.

[0027] The fixed arm 5 is symmetrically arranged below the upper frame 1, and is used to fix the lower frame 2 and the control mechanism 4, to ensure the stability of the whole structure, and to maintain the relative positional relationship between the exhaust mechanism 3 and the control mechanism 4 without deviation under the working conditions of cooling liquid flow and vibration.

[0028] Further, the exhaust mechanism 3 includes a horn air pipe 31, a small floating ball 32 and two large floating balls 33. The horn air pipe 31 is arranged below the side of the upper frame 1 and communicates with the exhaust hole 34, the small floating ball 32 is located in the horn air pipe 31, and the two large floating balls 33 are symmetrically arranged outside the horn air pipe 31. The small floating ball 32 is connected with the large floating balls 33 arranged on both sides through connecting rods 35, the large floating balls 33 are sleeved on guide rods 36 and can move up and down along the guide rods 36, when the large floating balls 33 move up and down, the small floating ball 32 is driven to move up and down, the opening of the horn air pipe 31 and the exhaust hole 34 is blocked and released, and the inner diameter of the exhaust hole 34 is smaller than the diameter of the small floating ball 32. Through such a linkage structure, the gas in the cooling liquid can be smoothly discharged, and at the same time after the cooling liquid is filled, the large floating balls 33 push the small floating ball 32 to tightly block the exhaust hole 34 under the action of the buoyancy, realizing the function of preventing the cooling liquid from leaking. Since the large floating balls 33 themselves can provide greater buoyancy, the buoyancy acts on the small floating ball 32 through the connecting rods 35, so that the small floating ball 32 is more closely blocked when blocking the exhaust hole 34, which significantly improves the sealing effect and avoids the leakage problem caused by the pressure fluctuation of the cooling liquid. In addition, the lower part of the horn air pipe 31 is designed as an expanded opening, and the floating ball can be stably positioned in the expanded opening under the action of gravity during the exhaust process, which does not hinder the smoothness of the exhaust passage, so as to ensure the smooth exhaust of the gas and further improve the exhaust efficiency. These structure designs cooperate with each other, so that the exhaust process is more efficient and reliable.

[0029] In addition, the guide rod 36 is arranged along the vertical center axis of the large floating ball 33, the upper end is fixed to the upper frame 1, and the lower end is provided with a limiting piece 37 for limiting the up-down stroke of the large floating ball 33. Such a structure ensures that the movement direction of the large floating ball 33 is consistent with the guide rod 36, avoiding deviation or inclination under the disturbance or pressure fluctuation of the cooling liquid, so that the large floating ball 33 can stably transfer the buoyancy to the small floating ball 32, realizing reliable blocking and releasing of the exhaust hole 34. At the same time, the upper end fixed to the upper frame 1 and the limiting piece 37 at the lower end limit the up-down stroke of the large floating ball 33, so as to ensure that the exhaust mechanism 3 can maintain a stable and smooth working state under different working conditions, further improving the reliability and durability of the entire thermostat.

[0030] The embodiment also includes two pressure sensors 6 arranged on the two guide rods 36 above the large floating ball 33 for detecting the pressure signals of the large floating balls 33 on both sides. Specifically, when the pressure sensors 6 detect the pressure signals applied by the large floating balls 33, the control signals are sent to the control mechanism 4 to adjust the response speed of the control mechanism 4 when judging the completion of exhaust, so as to realize the control logic of exhaust first and then temperature adjustment; when the pressure signals on both sides are inconsistent, a fault alarm is triggered. Through such design, the pressure sensors 6 can monitor the stress state of the large floating ball 33 in real time, and when the gas in the coolant is completely exhausted, the large floating ball 33 floats up and forms a stable pressure. The sensor 6 detects the signal and can trigger the control mechanism 4 in time to make it enter the normal temperature adjustment stage, avoiding the temperature control lag caused by residual gas in the cooling system. At the same time, when the pressure signals of the large floating balls 33 on both sides deviate, it can be judged whether the exhaust mechanism 3 has the fault conditions of tilting, jamming or unbalanced exhaust, and the alarm device is triggered to prompt the user to repair in time, so as to improve the safety and reliability of the whole thermostat and ensure the stable operation of the engine cooling system under various working conditions.

[0031] In the embodiment, the small floating ball 32 is connected with the large floating balls 33 arranged on both sides through the connecting rod 35, and the horizontal line where the connecting rod 35 is located coincides with the horizontal center axis of the large floating ball 33, so that the large floating ball 33 can stably and symmetrically transmit the buoyancy to the small floating ball 32 when it floats up and down, ensuring the reliability of its action. However, the connecting rod 35 can be designed eccentrically when connecting the small floating ball 32, that is, the position of the connecting rod 35 can be appropriately offset downward relative to the horizontal center axis of the small floating ball 32, which can prevent the sealing contact line of the connecting rod 35 and the small floating ball 32 from being too close when plugging the exhaust hole 34, thereby avoiding affecting the sealing effect due to structural interference or uneven stress. Through such eccentric design, the small floating ball 32 can obtain more sufficient fitting space at the exhaust hole 34, so that the elastic sealing layer can be uniformly stressed, thereby improving the reliability of plugging.

[0032] In one embodiment, the control mechanism 4 includes a piston part 43 that drives the main valve 41 and the bypass valve 42 to move through the volume change of the internal medium, and when the exhaust completion state is detected by the pressure sensor 6, the release of the mechanical limiting mechanism or the hydraulic damping mechanism is triggered to enable the internal medium to drive the main valve 41 to fully open, thereby physically realizing the logic of "exhausting first and then adjusting temperature". Through this design, the piston part 43 is limited or damped before complete exhaust, and can only move a limited stroke, thereby avoiding the main valve 41 from being fully opened in advance when there is still gas in the coolant, causing uneven cooling; and when the exhaust is completed, the piston part 43 can only exert full driving force to push the main valve 41 to normally operate after the release triggered by the feedback signal of the pressure sensor 6, thereby realizing the logical optimization of the cooling process. Preferably, the internal medium of the piston part 43 is paraffin, which pushes the push rod to drive the main valve 41 and the bypass valve 42 to operate when it expands by heating. This design utilizes the stability and controllability of paraffin thermal expansion to make the valve opening and closing accurately change with temperature, thereby ensuring the flexible adjustment of the engine cooling system at different temperatures.

[0033] In this embodiment, the main valve 41 and the bypass valve 42 are reset by the main valve spring 44 and the bypass valve spring 45. The main valve spring 44 is located between the main valve 41 and the lower frame 2, one end of which abuts against the main valve 41 and the other end of which abuts against the lower frame 2. The bypass valve spring 45 is located between the lower frame 2 and the bypass valve 42, one end of which abuts against the lower frame 2 and the other end of which abuts against the bypass valve 42. The arrangement of the springs not only ensures that the main valve 41 and the bypass valve 42 can be reset in time in the case of paraffin cooling contraction or failure, but also provides additional resilience to improve the stability and durability of the mechanism, thereby ensuring that the thermostat always maintains good response performance in long-term use.

[0034] In another embodiment, the control mechanism 4 is an electronic temperature control valve, and the signal output by the pressure sensor 6 is processed by the controller to adjust the opening rate or opening limit of the electronic temperature control valve. In this way, the pressure sensor 6 can provide a clear feedback signal after the exhaust process is completed, and the controller can adjust the opening rhythm of the electronic temperature control valve according to the signal, so that the valve action is delayed after the exhaust is completed, thereby avoiding the influence of residual gas in the coolant on the accuracy of temperature control. Unlike the mechanical response of paraffin expansion, the electronic temperature control valve is driven by an electrical signal, and the adjustment is more flexible and accurate. It can quickly change the opening rate or set the limit of the opening under different working conditions to achieve fine control of the coolant flow. This structure enables the thermostat to dynamically adjust according to the engine load and cooling demand while ensuring the logic of "exhausting first and then adjusting temperature", thereby significantly improving the intelligent level and use reliability of the system.

[0035] In this embodiment, the small floating ball 32 is made of a dense wear-resistant material, and an elastic sealing layer is arranged on the surface of the small floating ball 32 to enhance the sealing effect of the exhaust hole 34; the large floating ball 33 is made of a lightweight hollow structural material to provide sufficient buoyancy and maintain stable operation in the high-temperature cooling liquid. Such a design makes the small floating ball 32 not easy to wear during movement and long-term repeated opening and closing, and the elastic sealing layer covering the surface can form a flexible fit at the exhaust hole 34, thereby maintaining reliable sealing when the cooling liquid pressure fluctuates, avoiding cooling liquid leakage. The large floating ball 33 adopts a lightweight hollow material, which can not only reduce the overall weight, but also generate a larger buoyancy in the cooling liquid. Through the action of the connecting rod 35 on the small floating ball 32, the small floating ball 32 is more tightly sealed when sealing the exhaust hole 34, which improves the sealing performance. At the same time, the temperature-resistant properties of the material ensure long-term stability in the high-temperature environment of the engine, thereby prolonging the service life of the thermostat and improving the overall reliability of the exhaust mechanism 3.

[0036] In addition, the side wall of the trumpet air pipe 31 is provided with an axially extending guide groove 38, and the connecting rod 35 extends outside the trumpet air pipe 31 and is connected with the two large floating balls 33 through the guide groove 38, so as to ensure that the connecting rod 35 can move synchronously during the upward and downward movement of the large floating ball 33, and the lower flared portion of the trumpet air pipe 31 abuts against and limits the large floating ball 33. The arrangement of the guide groove 38 enables the connecting rod 35 to maintain linear motion under the driving of the floating ball, without interference or deviation in the interior of the trumpet air pipe 31, thereby ensuring the stable and reliable linkage between the small floating ball 32 and the large floating ball 33. When the large floating ball 33 floats up and down, the small floating ball 32 can accurately control the opening and closing of the exhaust hole 34 through the synchronous transmission of the connecting rod 35, avoiding the problems of jamming or deviation. At the same time, the flared portion of the lower part of the trumpet air pipe 31 forms an additional contact limiting point when the large floating ball 33 moves downward, which not only physically restricts the movement range of the large floating ball 33 to prevent abnormal stress on the connecting rod 35 caused by excessive sinking, but also ensures that the exhaust passage is always unobstructed, avoiding the large floating ball 33 hindering the gas discharge in the downward state, thereby further improving the efficiency and safety of the exhaust process.

[0037] In this embodiment, during the exhaust process, due to the action of gravity, the large floating ball 33 and the small floating ball 32 are located below, and the large floating ball 33 is double-limited by the limiting piece 37 and the lower flared part of the trumpet air pipe 31, so that its movement range is effectively restricted, thereby ensuring that the small floating ball 32 remains stable in the flared part and does not shake with the airflow fluctuation, so that the small floating ball 32 can accurately be located below the exhaust hole 34 without blocking the exhaust, and will not move irregularly due to the rapid passage of gas. Compared with the prior art which only relies on the gravity of the small floating ball itself to maintain the position, it is easy to be impacted by the airflow and collide in the exhaust passage and produce noise, the design of the present application significantly reduces the interference of the airflow on the floating ball, not only improves the stability and quietness of the exhaust, but also improves the comfort and reliability of the whole thermostat during use. In addition, the trumpet air pipe 31 adopts a tapered design along the airflow direction, so that the gas entering the exhaust passage is guided by the gradually reduced cross-sectional area when passing through, thereby accelerating the flow rate and forming a pressure difference, guiding the gas to be quickly concentrated in the direction of the exhaust hole 34 and discharged. This structure is equivalent to the application of Venturi effect in fluid mechanics, which not only can significantly reduce the gas flow resistance, but also can avoid the generation of turbulent flow and turbulence, so that the gas in the cooling liquid is discharged more smoothly and efficiently, while maintaining the stability and reliability of the exhaust process.

[0038] In summary, the present application provides a thermostat, which comprises an upper frame 1, a lower frame 2, an exhaust mechanism 3, a control mechanism 4, a fixed arm 5 and a pressure sensor 6, etc. The exhaust mechanism 3 comprises a gas passage and a floating assembly for opening or blocking the gas passage, the floating assembly comprising a trumpet air pipe 31, a small floating ball 32 and two large floating balls 33, the small floating ball 32 being linked with the large floating balls 33 through connecting rods 35, the large floating balls 33 being sleeved on guide rods 36 and realizing stable movement through limiting pieces 37, realizing smooth gas discharge before the cooling liquid is filled, and tightly blocking the exhaust hole 34 through the buoyancy effect after the cooling liquid is filled, thereby preventing the cooling liquid from leaking. The control mechanism 4 can adopt a main valve 41 driven by a piston part 43 and a bypass valve 42 to realize cooling liquid flow path switching, or an electronic temperature control valve for intelligent adjustment, to ensure efficient cooling of the engine under different working conditions. The present application provides additional buoyancy of the large floating ball 33 to the small floating ball 32, so that the blocking of the exhaust hole 34 is more tight and reliable, and the sealing effect is significantly improved in cooperation with the elastic sealing layer on the surface of the small floating ball 32. The pressure sensor 6 monitors the force state of the floating ball in real time, triggers the "exhaust first and temperature adjustment later" logic control after the exhaust is completed, and triggers a fault alarm when the signals on both sides are inconsistent, thereby effectively avoiding temperature control lag and system hazards caused by air blockage, and improving the safety and reliability of the whole thermostat.

[0039] The application has compact and reasonable overall structure, realizes multiple functions such as exhaust, sealing, monitoring and intelligent linkage under the premise of not significantly increasing the number of parts, overcomes the problems of unstable float ball exhaust, poor sealing effect and lack of feedback mechanism in the prior art. The technical scheme not only improves the working efficiency and safety of the engine cooling system, but also has positive significance for the development of the thermostat in intelligence, reliability and durability, and can play a wide application value and promotion prospect in the field of automobile engine cooling.

[0040] The above examples are only used to illustrate the technical solutions of the present application, but not to limit it; under the idea of the present application, the technical features in the above examples or different examples can also be combined, the steps can be implemented in any order, and there are many other changes of different aspects of the present application as described above, which are not provided in details for simplicity; although the present application has been described in detail with reference to the foregoing examples, those skilled in the art should understand that the technical solutions recorded in the foregoing examples can still be modified, or some technical features can be replaced by equivalents; and these modifications or replacements do not make the essence of the corresponding technical solution deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A thermostat characterized by comprising: The application relates to a cooling device for cooling liquid, which comprises the following components: an upper frame (1); a lower frame (2) connected with the upper frame (1); an exhaust mechanism (3) comprising a gas passage and a floating assembly for opening or blocking the gas passage, wherein the gas passage is an exhaust hole (34) arranged on one side of the upper frame (1), the floating assembly comprises at least two floating ball structures which are connected with each other, one of the floating ball structures is used for blocking the exhaust hole (34), and the other floating ball structures are located in a cooling liquid area and are driven to move by buoyancy, so that the cooling liquid exhaust and sealing switching are realized; a control mechanism (4) comprising a main valve (41) and a bypass valve (42), wherein the main valve (41) and the bypass valve (42) are arranged to open and close a radiator side outlet and a bypass outlet respectively and control flow, and the main valve (41) closes the radiator side outlet when abutting against the bottom of the upper frame (1); a fixing arm (5) symmetrically arranged below the upper frame (1), which is used for fixing the lower frame (2) and the control mechanism (4).

2. Thermostat according to claim 1, characterized in that The floating assembly comprises a horn air pipe (31), a small floating ball (32) and two large floating balls (33), the horn air pipe (31) is arranged below one side of the upper frame (1) and communicates with the exhaust hole (34), the small floating ball (32) is located in the horn air pipe (31), the two large floating balls (33) are symmetrically arranged outside the horn air pipe (31), the small floating ball (32) is connected with the large floating balls (33) arranged on the two sides through connecting rods (35), the large floating balls (33) are sleeved on guide rods (36) and can move up and down along the guide rods (36), when the large floating balls (33) move up and down, the small floating ball (32) is driven to move up and down, the opening of the horn air pipe (31) connected with the exhaust hole (34) is blocked and released, and the inner diameter of the exhaust hole (34) is smaller than the diameter of the small floating ball (32); the guide rods (36) are arranged along the vertical central axes of the large floating balls (33), the upper ends of the guide rods (36) are fixed to the upper frame (1), and the lower ends of the guide rods (36) are provided with limiters (37) for limiting the up-and-down stroke of the large floating balls (33).

3. Thermostat according to claim 2, characterized in that Two pressure sensors (6) are further arranged on the two guide rods (36) above the large floating balls (33) and are used for detecting the pressure signals of the large floating balls (33) on the two sides, when the pressure sensors (6) detect the pressure signals applied by the large floating balls (33), the control mechanism (4) is sent with a control signal for adjusting the response speed of the control mechanism (4) when the exhaust is completed, so that the control logic of pre-exhaust and post-temperature adjustment is realized; when the pressure signals on the two sides are inconsistent, a fault alarm is triggered.

4. Thermostat according to claim 3, characterized in that The control mechanism (4) includes a piston part (43) which drives the main valve (41) and bypass valve (42) to move by volume change of internal medium, when the exhaust completion state is detected by the pressure sensor (6), the release of mechanical limiting mechanism or hydraulic damping mechanism is triggered, so that the internal medium can drive the main valve (41) to open full stroke, thereby realizing the physical structure of exhaust before temperature regulation.

5. Thermostat according to claim 4, characterized in that The internal medium of the piston part (43) is paraffin, which expands when heated to push the push rod to drive the main valve (41) and bypass valve (42) to act.

6. Thermostat according to claim 5, characterized in that The main valve (41) and bypass valve (42) are reset by the main valve spring (44) and bypass valve spring (45), the main valve spring (44) is located between the main valve (41) and the lower frame (2), one end abuts against the main valve (41), and the other end abuts against the lower frame (2); the bypass valve spring (45) is located between the lower frame (2) and the bypass valve (42), one end abuts against the lower frame (2), and the other end abuts against the bypass valve (42).

7. The thermostat of claim 3 wherein, The control mechanism (4) is an electronic temperature control valve, and the signal output by the pressure sensor (6) is processed by the controller to adjust the opening rate or opening limit of the electronic temperature control valve.

8. The thermostat of claim 2, wherein The small floating ball (32) is made of dense wear-resistant material, and an elastic sealing layer is arranged on the surface of the small floating ball (32) to enhance the sealing effect of the exhaust hole (34); the large floating ball (33) is made of light hollow structural material to provide sufficient buoyancy and maintain stable operation in high-temperature cooling liquid.

9. Thermostat according to claim 8, characterized in that The side wall of the horn air pipe (31) is provided with an axially extending guide groove (38), the connecting rod (35) passes through the guide groove (38) and extends out of the horn air pipe (31) to be connected with the two large floating balls (33), so as to ensure that the connecting rod (35) can move synchronously during the up-down movement of the large floating balls (33).

10. Thermostat according to claim 9, characterized in that The lower part of the horn air pipe (31) is flared to abut against and limit the large floating ball (33).

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