Small-size large-stroke thermostat and temperature control valve adjusting method

Abstract

The invention discloses a small-size large-stroke thermostat and a temperature control valve adjusting method, and belongs to the technical field of temperature adjustment and control. The small-size large-stroke thermostat comprises a temperature sensing assembly, a connecting assembly and a pushing assembly. One end of the temperature sensing assembly is hermetically connected with one end of the connecting assembly, and the other end of the connecting assembly is hermetically connected with one end of the pushing assembly; the temperature sensing assembly pushes a medium in the connecting assembly to move through temperature changes, and further pushes the pushing assembly to be tightly pressed with or separated from a valve rod in the temperature adjusting valve. The size of the temperature sensing assembly is reduced through the phase change characteristic of the temperature sensing wax, the precision is improved in cooperation with the low compression ratio of the connecting assembly, the installation difficulty is remarkably reduced, and the temperature sensor is suitable for temperature precise control scenes.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of temperature regulation control, in particular to a small-volume large-stroke thermostat and a temperature control valve adjustment method. BACKGROUND

[0002] A traditional temperature regulating valve is composed of a regulating valve and a thermostat, wherein the thermostat is composed of a temperature sensing rod, a capillary tube, a working cylinder, a piston rod, a spring and the like. The temperature sensing rod is filled with liquid glycerin as a temperature sensing medium, which is used to expand by heat. However, the thermal expansion coefficient of the glycerin is small, so that the volume of the temperature sensing rod is large, and the installation position is harsh, and the engineering design and construction are difficult.

[0003] A low-temperature thermostat is disclosed in a Chinese patent with publication number CN207038275U, which includes a low-temperature refrigerator arranged to cool an interior of a cryogen container within the low-temperature thermostat, the low-temperature refrigerator being arranged inside a refrigerator jacket, and the low-temperature thermostat further includes a conduit controlled by a passive temperature-sensitive valve to selectively provide a first path for cryogen gas flow through the refrigerator jacket, the passive temperature-sensitive valve being controlled in dependence on a temperature of cryogen gas supplied from the refrigerator jacket to the passive temperature-sensitive valve. The above-mentioned device has a large volume, which is difficult to install quickly and has a harsh requirement for the installation position. SUMMARY

[0004] The present application is to solve the above-mentioned prior art, improve the installation efficiency of the thermostat, and reduce the requirement for the installation position.

[0005] The technical solution adopted by the present application is as follows: A small-volume large-stroke thermostat, comprising a temperature sensing assembly, a connecting assembly and a pushing assembly; One end of the temperature sensing assembly is sealingly connected to one end of the connecting assembly, and the other end of the connecting assembly is sealingly connected to one end of the pushing assembly; The temperature sensing assembly pushes the medium in the connecting assembly to move by temperature change, and further pushes the pushing assembly to press or separate from the valve rod inside the temperature regulating valve.

[0006] By adopting the technical scheme, the temperature sensing assembly, the connecting assembly and the pushing assembly are assembled in series in a sealed connection mode at one end to form a continuous functional chain of temperature sensing, medium transmission and valve rod driving. The compact modular assembly relationship makes the functional boundaries of each component clear, and the temperature sensing assembly focuses on temperature sensing, the connecting assembly focuses on medium transmission and the pushing assembly focuses on valve rod driving, which not only reduces the redundant structure occupying space and realizes small size design, but also avoids the risk of medium leakage through sealed connection, thereby improving the overall working stability and installation adaptability of the thermostat without complex space layout.

[0007] Further, the temperature sensing assembly comprises a temperature sensing shell, a temperature sensing medium and an expansion diaphragm; The temperature sensing shell is filled with the temperature sensing medium and is packaged by the expansion diaphragm, and a first pushing assembly is arranged between the expansion diaphragm and the connecting assembly, wherein the first pushing assembly comprises a support one, a cavity, a sliding rod one and a top rod; The temperature sensing shell is mounted at the bottom of the top rod, the sliding rod one is in contact with the top rod, and the sliding rod one is slidably mounted in the inside of the support one along the length direction of the support one; The cavity is arranged in the inside of the support one at the top of the sliding rod one, a sealing sheet is arranged between the cavity and the sliding rod one, and the cavity is in communication with the connecting assembly.

[0008] By adopting the technical scheme, the temperature sensing assembly is packaged with the temperature sensing medium by the temperature sensing shell, and the expansion diaphragm is sealed in cooperation with the first pushing assembly linkage. Through the change of temperature, the state of the temperature sensing medium is changed, so that the expansion or contraction of the temperature sensing medium is more accurate in the process of converting into mechanical displacement. Specifically, the temperature sensing shell is directly mounted at the bottom of the top rod, and the expansion diaphragm can directly push the top rod when deformed. The sliding rod one is in contact with the top rod and slides along the support one, so that the slight deformation of the diaphragm is transmitted to the linear sliding of the sliding rod one through the top rod. The top of the sliding rod one and the cavity of the support one are sealed by the sealing sheet, so as to ensure that only the medium in the cavity is compressed when the sliding rod one slides, without leakage, thereby efficiently converting the sensing signal of temperature change into a medium pressure signal, laying a reliable foundation for the subsequent connecting assembly to transmit power.

[0009] Further, the connecting assembly comprises a capillary tube and a pushing medium, and the pushing medium is made of liquid; One end of the capillary tube is in sealed communication with the cavity in the inside of the support one, and the temperature sensing medium is filled in the cavity and the capillary tube.

[0010] By adopting this technical solution, the connection assembly utilizes a capillary tube connecting the cavity and the liquid driving medium. The slender structure of the capillary tube and the incompressibility of the liquid medium resolve the contradiction between small size and large stroke. On the one hand, the capillary tube can be flexibly arranged within a limited space, such as by bending and extending, which reduces the requirements for installation location. On the other hand, the liquid driving medium does not freeze at low temperatures and does not vaporize at high temperatures, ensuring continuous transmission of pressure between the cavity and the capillary tube, thereby amplifying the tiny pressure changes in the temperature sensing component into a large stroke drive for the driving component.

[0011] Furthermore, the temperature sensing housing is made of brass, the temperature sensing medium is made of the temperature sensing wax, the expansion diaphragm is made of rubber, and the pushing medium is made of glycerin.

[0012] By adopting the above technical solution, the brass shell has fast heat conduction and can quickly sense the pipeline temperature. The temperature-sensitive wax has a large phase change and volume change. The rubber diaphragm has good elasticity and can accurately transmit the expansion force. The glycerin has strong chemical stability, which not only ensures the sensitivity of temperature perception, but also enhances the reliability of power transmission, ultimately improving the service life and working accuracy of the thermostat.

[0013] Furthermore, the other end of the capillary is connected to the second pushing component, and the second pushing component includes a slide rod 2, a support 2 and a joint; the support 2 is sealed and connected to the capillary, the slide rod 2 is arranged inside the support 2, and the joint is slidably arranged at the bottom of the support 2 along the length direction of the support 2, the slide rod 2 is in contact with the joint, and the sealing sheet is arranged between the slide rod 2 and the joint.

[0014] By adopting this technical solution, the second pusher assembly, connected to Support 2 via a capillary tube, slidably mounted on Slide 2, and with the connector in contact with Slide 2, more efficiently converts hydraulic power transmitted by the connection assembly into valve stem displacement. The capillary tube is sealed in contact with Support 2, ensuring leak-free transmission of glycerin pressure to Support 2. As Slide 2 slides along Support 2, it directly pushes the connector into contact with the valve stem, eliminating any additional transmission losses. A sealing gasket between Slide 2 and the connector further prevents glycerin leakage, converting hydraulic power into mechanical displacement of Slide 2, thereby achieving a long-stroke actuation of the valve stem.

[0015] The present invention further discloses a temperature control valve adjustment method, which is characterized in that the opening degree of the temperature control valve is adjusted by using a small-volume, large-stroke thermostat to adjust the temperature, and the method includes the following steps: S1. The temperature sensing component senses the temperature change of the pipeline, triggering the expansion or contraction of the temperature sensing medium; S2. The volume change of the temperature-sensing medium is transmitted to the driving medium within the connecting assembly through the first pushing assembly; S3. The pressure is transmitted to the second pushing assembly through the capillary tube; S4. The second pushing assembly converts the pressure into displacement, pushing the internal valve stem of the temperature regulating valve to move.

[0016] By adopting the above technical scheme, the transmission path of temperature change from the sensing signal to the valve stem action is clear and controllable. Each step is linked, the temperature sensing medium expands to trigger medium transmission, the medium transmission triggers hydraulic power, the hydraulic power triggers valve stem displacement, avoiding the response delay or action jam caused by the multi-path transmission of the traditional thermostat, and significantly improving the real-time and accuracy of temperature regulation.

[0017] Further, in step S1, the temperature sensing assembly senses the pipeline temperature through a temperature sensing shell made of brass; When the temperature rises, the temperature sensing wax filled in the temperature sensing shell melts and expands, pushing the rubber expansion diaphragm to deform in the direction of the first pushing assembly; When the temperature decreases, the temperature sensing wax solidifies and shrinks, and the expansion diaphragm resets.

[0018] By adopting the above technical scheme, the rapid heat conduction of the brass shell shortens the temperature sensing delay, the phase change characteristics of the solid and liquid temperature sensing wax provide stable volume change to avoid performance degradation caused by material fatigue, and the elastic deformation of the rubber diaphragm accurately transmits the expansion force. The assembly of the three ensures that the thermostat can sense and trigger accurately in time when the temperature fluctuates.

[0019] Further, in step S2, the deformed expansion diaphragm pushes the top rod to move along the length direction, and the top rod drives the sliding rod one to slide in the support one; The top of the sliding rod one and the cavity in the support one are sealed by a sealing piece, and when the sliding rod one slides, the pushing medium in the cavity is compressed to generate hydraulic power applied to the second pushing assembly.

[0020] By adopting the above technical scheme, the process of converting the small deformation of the diaphragm into medium pressure is more efficient. The direct contact between the top rod and the sliding rod one without intermediate transmission components reduces the force transmission loss; when the sliding rod one slides along the support one, the sealing piece and the cavity are sealed only to compress the medium without leakage, so that the expansion force of the diaphragm is converted into the pressure of the medium in the cavity, providing a stable pressure source for the subsequent capillary transmission power.

[0021] Further, in step S3, the glycerol compressed in the cavity is transmitted to the support two of the second pushing assembly through the capillary tube; One end of the capillary tube is in sealed communication with the cavity, and the other end of the capillary tube is in sealed communication with the support two, forming a continuous hydraulic power transmission path.

[0022] By adopting the technical scheme, the two ends of the capillary are sealed with the cavity and the support two respectively, so that pressure loss caused by connection gap during glycerol transmission is avoided; the liquid property of glycerol enables the pressure in the cavity to be completely transmitted to the support two, so that the second pushing assembly can timely receive power signal, and the response speed of the thermostat is improved.

[0023] Further, in the step S4, the glycerol hydraulic power in the support two pushes the slide rod two to slide along the length direction of the support two, and the slide rod two pushes the joint to contact with the valve rod in the temperature control valve; When the temperature decreases, the glycerol pressure is released, and the slide rod two and the joint are reset under the backflow of the glycerol, and drive the valve rod of the temperature control valve to reset.

[0024] By adopting the technical scheme, the conversion of hydraulic power to mechanical displacement is more direct. The slide rod two directly contacts with the joint, and when the slide rod two is pushed to slide by the glycerol pressure, the joint synchronously pushes the valve rod, and the displacement synchronization is high; when the glycerol backflows, the slide rod two and the joint are reset under the pressure release of the medium, which not only simplifies the structure, but also ensures that the valve rod can be reset in time when the temperature decreases, and the precise adjustment of the opening degree of the temperature control valve is realized.

[0025] The present application has the following beneficial effects: 1. The present application directly contacts and assembles the temperature sensing shell, the expansion diaphragm of the temperature sensing assembly and the first pushing assembly, the temperature sensing shell is installed at the bottom of the top rod, the expansion diaphragm contacts with the top rod, the slide rod one slides along the support one, the intermediate link of temperature sensing to mechanical displacement transmission is reduced, force loss is avoided, the expansion of the temperature sensing medium can be efficiently converted into linear sliding of the slide rod one, and the sensitivity of temperature response is improved; 2. The present application is sealed and communicated with the cavity of the connecting assembly and the support two of the second pushing assembly, the two ends of the capillary are sealed and connected with the cavity and the support two respectively, a continuous hydraulic power transmission path is constructed, the liquid glycerol transmits pressure in the capillary without leakage, the incompressibility of the liquid is used to enlarge the stroke, and the capillary is flexibly adapted to small space installation through the slender structure; 3. The present application is contact type assembled by the slide rod two and the joint of the second pushing assembly, the slide rod two directly contacts with the joint, the joint contacts with the valve rod of the temperature control valve, the hydraulic power is directly converted into displacement of the valve rod, the gap or jamming problem in the traditional transmission is avoided, the slide rod two is ensured to synchronously push the valve rod when sliding, and the precision and real-time of the temperature control valve adjustment is improved; 4. The application is equipped with a temperature sensing assembly and a first push assembly in elastic linkage, the expansion diaphragm deforms to push the ejector rod, the ejector rod drives the sliding rod one to slide, the sliding rod one is sealed with the cavity through the sealing sheet, both the elastic deformation of the expansion diaphragm and the sealing sheet prevent the medium leakage, ensure the stable pressure when the sliding rod one compresses the glycerol in the cavity, and strengthen the reliability of power transmission and the stability of long-term use. BRIEF DESCRIPTION OF DRAWINGS

[0026] Figure 1 It is a structural schematic diagram of the application; Figure 2 It is a method flowchart of the application; Figure 3 It is a working principle diagram of the application; Figure 4 It is a temperature and valve rod compression distance relationship diagram of the application.

[0027] Among them, 1-temperature sensing assembly; 11-temperature sensing shell; 12-temperature sensing medium; 13-expansion diaphragm; 2-connection assembly; 21-capillary; 22-pushing medium; 3-pushing assembly; 31-first pushing assembly; 311-sliding rod one; 312-support one; 313-cavity; 314-ejector rod; 32-second pushing assembly; 321-sliding rod two; 322-support two; 323-joint; 33-sealing sheet. DETAILED DESCRIPTION

[0028] The application will be further described in detail below in combination with the drawings and specific preferred embodiments.

[0029] In the description of the application, it should be understood that the terms "left side", "right side", "upper part", "lower part" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and "first", "second" and the like do not represent the importance of the parts, so it cannot be understood as a limitation on the application. The specific dimensions used in the embodiments are only for the purpose of illustrating the technical solutions and do not limit the protection scope of the application.

[0030] REFERENCE Figure 1It can be known that the small-volume large-stroke thermostat based on the application is formed by a temperature sensing assembly 1, a first pushing assembly 31, a connecting assembly 2 and a second pushing assembly 32, wherein the temperature sensing assembly 1 is composed of a temperature sensing shell 11, a temperature sensing medium 12 and an expansion diaphragm 13, the temperature sensing shell 11 is filled with the temperature sensing medium 12 and is sealed by the expansion diaphragm 13, the temperature sensing shell 11 is installed at the bottom of a top rod 314 of the first pushing assembly 31, the top rod 314 is in contact with a sliding rod 311, the sliding rod 311 is slidably installed in a support 312 along the length direction of the support 312, the top of the sliding rod 311 forms a cavity 313 in the support 312, the cavity 313 and the sliding rod 311 are sealed by a sealing piece 33, one end of a capillary tube 21 of the connecting assembly 2 is in sealed communication with the cavity 313 in the support 312, the other end of the capillary tube 21 is in sealed communication with a support 322 of the second pushing assembly 32, the capillary tube 21 and the cavity 313 are filled with a liquid pushing medium 22, glycerin, the support 322 of the second pushing assembly 32 is provided with a sliding rod 321, the sliding rod 321 is in contact with a joint 323 which can slide along the length direction of the support 322, and the sliding rod 321 and the joint 323 are also provided with the sealing piece 33, as a whole, the temperature sensing assembly 1 is adjacent to the first pushing assembly 31 through the expansion diaphragm 13, the cavity 313 of the first pushing assembly 31 is in communication with the support 322 of the second pushing assembly 32 through the capillary tube 21, a series sealed assembly structure of the temperature sensing assembly 1, the first pushing assembly 31, the connecting assembly 2 and the second pushing assembly 32 is formed, finally the joint 323 of the second pushing assembly 32 is in contact with an inner valve rod of a temperature regulating valve and linkage, the opening and closing of the temperature regulating valve is controlled, so that the temperature is adjusted.

[0031] In one embodiment, when the pipeline temperature rises, the brass temperature sensing shell 11 in the temperature sensing assembly 1 quickly senses the temperature change, the temperature sensing wax filled in the temperature sensing shell 11 is melted and expanded from solid state, and the expansion diaphragm 13 made of rubber is deformed to the first pushing assembly 31; Since the top of the sliding rod 311 and the cavity 313 of the support 312 are sealed by the sealing piece 33, the sliding of the sliding rod 311 will compress the glycerin pushing medium 22 in the cavity 313 to generate hydraulic power; the compressed glycerin is transmitted to the support 322 of the second pushing assembly 32 through the capillary tube 21 of the connecting assembly 2, the two ends of the capillary tube 21 are in sealed communication with the cavity 313 and the support 322 respectively, and a continuous hydraulic transmission path is formed; the glycerin hydraulic power in the support 322 pushes the sliding rod 321 to slide along the length direction of the support 322, the sliding rod 321 further pushes the joint 323 in contact with the sliding rod 321, so that the joint 323 is in contact with the inner valve rod of the temperature regulating valve and applies a pushing force, thereby increasing the displacement of the valve rod and adjusting the opening degree of the temperature control valve, such as increasing the flow to reduce the temperature; When the temperature decreases, the temperature-sensitive wax solidifies and shrinks from liquid, the expansion diaphragm 13 resets, the slide rod one 311 resets under the action of the diaphragm resilience, the glycerol pressure in the cavity 313 is released; the glycerol returns to the cavity 313 through the capillary tube 21, the pressure in the support two 322 decreases, the slide rod two 321 and the joint 323 reset under the action of the glycerol return, the temperature control valve stem resets, and the opening degree of the valve is reduced, such as reducing the flow, to maintain the temperature.

[0032] The application further discloses a temperature control valve adjusting method, which adjusts the opening degree of the temperature control valve through the small-volume large-stroke thermostat, so as to adjust the temperature, and comprises the following steps: S1. The temperature sensing assembly 1 senses the change of the pipeline temperature, and triggers the expansion or shrinkage of the temperature-sensitive medium 12; S2. The volume change of the temperature-sensitive medium 12 is transmitted to the pushing medium 22 in the connecting assembly 2 through the first pushing assembly 31; S3. The pushing medium 22 transmits the pressure to the second pushing assembly 32 through the capillary tube 21; S4. The second pushing assembly 32 converts the pressure into displacement, and pushes the internal valve stem of the temperature adjusting valve to move.

[0033] In an embodiment, referring to Figure 2 It can be known that, in step S1, the temperature sensing assembly 1 senses the change of the pipeline temperature in real time through the temperature sensing shell 11 made of brass, when the temperature increases: the temperature-sensitive wax filled in the temperature sensing shell 11 gradually melts from solid, the intermolecular distance expands, the volume expands, and the expansion diaphragm 13 made of rubber deforms to the direction of the first pushing assembly 31, that is, the direction of the jacking rod 314 is extruded; When the temperature decreases: the temperature-sensitive wax solidifies and shrinks from liquid, the volume decreases, and the expansion diaphragm 13 resets and rebounds away from the jacking rod 314 after losing the expansion thrust; In step S2, the deformation of the expansion diaphragm 13 directly triggers mechanical transmission, the deformed expansion diaphragm 13 pushes the jacking rod 314 to move along the length direction, the jacking rod 314 is pushed forward when the temperature increases, and the jacking rod 314 moves backward after the expansion diaphragm 13 resets when the temperature decreases, the jacking rod 314 drives the slide rod one 311 to slide along the length direction in the support one 312, and the slide rod one 311 is in contact with the jacking rod 314 and moves synchronously with the jacking rod. Since the top of the slide rod one 311 and the cavity 313 in the support one 312 are sealed by the sealing sheet 33, the sliding of the slide rod one 311 compresses the pushing medium 22, that is, glycerol, in the cavity 313, so that the hydraulic power is generated in the glycerol, the slide rod one compresses the glycerol forward when the temperature increases, and the slide rod one resets to release the glycerol pressure when the temperature decreases.

[0034] In step S3, the compressed glycerol is transmitted to the second pushing assembly 32 through the capillary tube 21 of the connecting assembly 2, one end of the capillary tube 21 is in sealed communication with the cavity 313 of the support one 312, and the other end is in sealed communication with the support two 322 of the second pushing assembly 32, forming a continuous hydraulic transmission path, through which the compressed glycerol in the cavity 313 flows into the inside of the support two 322, and the hydraulic power is transmitted from the first pushing assembly 31 to the second pushing assembly 32; In step S4, the hydraulic power finally acts on the valve rod of the temperature control valve to realize opening degree adjustment: When the temperature rises: the glycerol hydraulic power in the support two 322 pushes the slide rod two 321 to slide along the length direction of the support two 322 and advances forward, the slide rod two 321 further pushes the joint 323 in contact with it, so that the joint 323 contacts the valve rod inside the temperature control valve and applies a pushing force, thereby increasing the displacement of the valve rod and adjusting the opening degree of the temperature control valve, such as increasing the flow to reduce the temperature; When the temperature decreases: the temperature sensing wax shrinks to reset the expansion diaphragm 13, the slide rod one 311 resets to release the glycerol pressure in the cavity 313, the glycerol returns to the cavity 313 through the capillary tube 21, and the pressure in the support two 322 decreases; the slide rod two 321 and the joint 323 move backward under the action of glycerol return, and drive the temperature control valve rod to reset, thereby reducing the opening degree of the valve, such as reducing the flow to maintain the temperature; The temperature sensing medium 12 of the application is temperature sensing wax, and different temperature range temperature sensing wax is selected according to environmental needs, including low temperature temperature sensing wax, medium temperature temperature sensing wax and high temperature temperature sensing wax.

[0035] In one embodiment, referring to Figure 3 It can be known that the pushing medium in the capillary tube 21 is replaced by glycerol, after the diesel engine is started, the engine oil circulates in the diesel engine to absorb the heat generated during operation, the temperature gradually rises, and then is transmitted to the engine oil heat exchanger through the engine oil pipeline for preliminary heat exchange to reduce the temperature; at this time, the temperature sensing assembly 1 of the small volume thermostat senses the temperature change of the engine oil in real time, when the engine oil temperature rises to 65 DEG C, the special temperature sensing medium 12 in the temperature sensing assembly 1 melts into liquid state under heat, the intermolecular distance expands to cause volume expansion, the slide rod one 311 is driven to move by the top rod 314, the glycerol in the capillary tube 21 and the cavity 313 is compressed, the glycerol is transmitted to the second pushing assembly 32 through the capillary tube 21, the slide rod two 321 and the temperature control water valve rod are driven to move, and the temperature control water valve is opened by 20%, allowing a certain amount of coolant to pass through to cool; When the temperature further rises to 75 DEG C, the temperature sensing medium 12 continues to expand, the slide rod one 311 continues to compress the glycerol, the second pushing assembly 32 drives the temperature control water valve to be fully opened, and the flow of the coolant is increased to strengthen the cooling effect; The coolant flows to the intercooler through the temperature control water valve, and is circulated in the intercooler and related pipelines by the intercooler water pump to take away heat and dissipate heat through the intercooler radiator. Finally, through the linkage mechanism of temperature sensing, medium transmission, pressure conversion and valve rod driving, the dynamic balance control of the engine oil temperature in the range of 65-75°C is realized.

[0036] In one embodiment, referring to Figure 3 and Figure 4 It can be seen that in actual application, the temperature sensing wax is used as the temperature sensing medium 12, and the glycerol is used as the driving medium 22. In the temperature range of 60-70°C, the temperature and the compression distance of the valve rod are positively correlated, that is, as the temperature rises, the compression distance of the valve rod generally shows an upward trend. However, the increasing amplitude is different in different temperature ranges. In the initial stage (60-63°C), the compression distance of the valve rod increases slowly, and the compression distance increases relatively small for each 1°C increase in temperature, such as from 60°C to 61°C, the compression distance only increases from 0 to 1.2 mm; in the middle stage (63-69°C), the growth rate of the compression distance of the valve rod is significantly larger, the curve slope increases, and the influence of temperature on the compression distance of the valve rod is more significant, for example, between 63 and 64°C, the compression distance increases from 2.69 mm to 4.32 mm; in the later stage (69-70°C), the compression distance of the valve rod gradually slows down, and the curve tends to be flat, and between 69 and 70°C, the compression distance increases from 12.35 mm to 12.50 mm, indicating that the compression of the valve rod approaches a certain stable state or the change rate becomes smaller when approaching 70°C.

[0037] Working principle: through special temperature sensing wax filled in brass temperature sensing shell 11, when the temperature rises, the temperature sensing wax melts from solid to liquid, the intermolecular distance expands, resulting in linear relationship between temperature and volume expansion in a certain range, which drives the rubber expansion diaphragm 13 to deform to the first push assembly 31 direction; when the temperature decreases, the temperature sensing wax solidifies from liquid to solid and shrinks, and the expansion diaphragm 13 resets. The deformation of the expansion diaphragm 13 triggers the conversion of mechanical transmission and hydraulic pressure, and the deformed diaphragm expansion diaphragm 13 drives the top rod 314 to move, and the top rod drives the sliding rod one 311 to slide in the support one 312, which compresses the glycerol in the sealed cavity 313 to generate hydraulic power, and the compressed glycerol is transmitted to the support two 322 of the second push assembly 32 through the capillary tube 21; the hydraulic power drives the sliding rod two 321 to slide, and the sliding rod two drives the valve stem in the temperature control valve through the joint 323 to realize opening degree adjustment, when the temperature rises, the valve stem displacement increases to expand the opening degree, and when the temperature decreases, the glycerol backflow makes the valve stem reset to reduce the opening degree. Compared with the traditional thermostat, the liquid glycerol has small thermal expansion coefficient, which needs large volume temperature sensing rod, resulting in harsh installation position. The present application utilizes the phase change characteristics of temperature sensing wax, the stroke increases by 1mm when the temperature rises by 1℃, which realizes small volume and large stroke adjustment, and cooperates with the low compression ratio characteristics of glycerol, the compression coefficient is about 5.1x10⁻ 4 Pa⁻¹ at room temperature, which reduces the stroke error and improves the precision; at the same time, the heat sensitive part is small in shape, which can be adapted to various pipelines, significantly reduces the installation difficulty and the limitation of engineering design and construction, and has wider application scenarios.

[0038] The above describes the preferred embodiments of the present application, but the present application is not limited to the specific details in the above embodiments, and various equivalent transformations can be made to the technical solutions of the present application within the technical concept of the present application, which all belong to the protection scope of the present application.

Claims

1. A small-volume, large-stroke thermostat, characterized by: It includes a temperature sensing component (1), a connecting component (2) and a pushing component (3); One end of the temperature sensing component (1) is sealedly connected to one end of the connecting component (2), and the other end of the connecting component (2) is sealedly connected to one end of the pushing component (3); The temperature sensing component (1) drives the medium in the connecting component (2) to move through temperature changes, and further drives the pushing component (3) to be pressed against or separated from the valve stem inside the temperature regulating valve.

2. The small-volume, large-stroke thermostat according to claim 1, characterized in that: The temperature sensing component (1) comprises a temperature sensing housing (11), a temperature sensing medium (12) and an expansion diaphragm (13); The interior of the temperature sensing housing (11) is filled with the temperature sensing medium (12) and is encapsulated by the expansion diaphragm (13); a first pushing component (31) is provided between the expansion diaphragm (13) and the connecting component (2); the first pushing component (31) includes a support (312), a cavity (313), a sliding rod (311) and a push rod (314); The temperature sensing housing (11) is mounted on the bottom of the top rod (314), the sliding rod (311) contacts the top rod (314), and the sliding rod (311) is slidably mounted inside the support (312) along the length direction of the support (312); The top of the sliding rod 1 (311) is located inside the support 1 (312), and the cavity (313) is provided. A sealing sheet (33) is provided between the cavity (313) and the sliding rod 1 (311). The cavity (313) is connected to the connecting component (2).

3. The small-volume, large-stroke thermostat according to claim 2, characterized in that: The connecting component (2) comprises a capillary tube (21) and a pushing medium (22), wherein the pushing medium (22) is made of liquid; One end of the capillary tube (21) is sealed and connected to the cavity (313) inside the support (312), and the temperature sensing medium (12) is filled in the cavity (313) and the capillary tube (21).

4. The small-volume, large-stroke thermostat according to claim 3, characterized in that: The temperature sensing housing (11) is made of brass, the temperature sensing medium (12) is made of temperature sensing wax, the expansion diaphragm (13) is made of rubber, and the pushing medium (22) is made of glycerin or water.

5. The small-volume, large-stroke thermostat according to claim 3, characterized in that: The other end of the capillary (21) is connected to the second pushing component (32), and the second pushing component (32) includes a second slide bar (321), a second support (322) and a joint (323); the second support (322) is sealed and connected to the capillary (21), the second slide bar (321) is arranged inside the second support (322), and the joint (323) is slidably arranged at the bottom of the second support (322) along the length direction of the second support (322), the second slide bar (321) is in contact with the joint (323), and the sealing sheet (33) is arranged between the second slide bar (321) and the joint (323).

6. A temperature control valve adjustment method, characterized in that: The method of adjusting the opening degree of a temperature control valve and thus adjusting the temperature by using the small-volume, large-stroke thermostat according to any one of claims 1 to 5 comprises the following steps: S1. The temperature sensing component (1) senses the temperature change of the pipeline and triggers the temperature sensing medium (12) to expand or contract; S2. The volume change of the temperature-sensing medium (12) is transmitted to the pushing medium (22) in the connecting component (2) through the first pushing component (31); S3. The pushing medium (22) transmits the pressure to the second pushing component (32) through the capillary (21); S4. The second pushing component (32) converts the pressure into displacement, pushing the internal valve stem of the temperature regulating valve to move.

7. The temperature control valve adjustment method according to claim 6, characterized in that: In step S1, the temperature sensing component (1) senses the pipeline temperature through the temperature sensing housing (11) made of brass; When the temperature rises, the temperature-sensitive wax filled in the temperature-sensitive housing (11) melts and expands from the solid state, pushing the expansion diaphragm (13) made of rubber material to deform in the direction of the first pushing component (31); When the temperature drops, the temperature-sensitive wax solidifies and contracts from the liquid state, and the expansion diaphragm (13) is reset.

8. The temperature control valve adjustment method according to claim 6, characterized in that: In step S2, the expansion diaphragm (13) is deformed to push the push rod (314) to move along the length direction, and the push rod (314) drives the sliding rod (311) to slide in the support (312); The top of the slide rod 1 (311) and the cavity (313) inside the support 1 (312) are sealed by a sealing sheet (33). When the slide rod 1 (311) slides, the pushing medium (22) in the cavity (313) is compressed to generate hydraulic power that is applied to the second pushing component (32).

9. The temperature control valve adjustment method according to claim 8, characterized in that: In the step S3, the compressed glycerin in the cavity (313) is transferred to the second support (322) of the second pushing component (32) through the capillary (21); One end of the capillary tube (21) is in sealed communication with the cavity (313), and the other end of the capillary tube (21) is in sealed communication with the second support (322), thereby forming a continuous hydraulic power transmission path.

10. The temperature control valve adjustment method according to claim 6, characterized in that: In the step S4, the glycerin hydraulic power in the support 2 (322) pushes the slide 2 (321) to slide along the length direction of the support 2 (322), and the slide 2 (321) pushes the joint (323) to contact the valve stem inside the temperature control valve; When the temperature drops, the glycerin pressure is released, and the second slide rod (321) and the joint (323) return to their original positions under the action of glycerin backflow, driving the temperature control valve stem to reset.

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