CN110953401A - Thermal actuator - Google Patents
Thermal actuator Download PDFInfo
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- CN110953401A CN110953401A CN201911303242.7A CN201911303242A CN110953401A CN 110953401 A CN110953401 A CN 110953401A CN 201911303242 A CN201911303242 A CN 201911303242A CN 110953401 A CN110953401 A CN 110953401A
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- pressure
- piston
- spring
- sealed container
- push rod
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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
- F16K17/00—Safety valves; Equalising valves, e.g. pressure relief valves
- F16K17/36—Safety valves; Equalising valves, e.g. pressure relief valves actuated in consequence of extraneous circumstances, e.g. shock, change of position
- F16K17/38—Safety valves; Equalising valves, e.g. pressure relief valves actuated in consequence of extraneous circumstances, e.g. shock, change of position of excessive temperature
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
- F24D19/00—Details
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Air-Flow Control Members (AREA)
Abstract
The invention discloses a thermal actuator, and aims to provide a thermal actuator which realizes driving action by using displacement change generated by temperature change as driving force. The device comprises a pressure-bearing sealed container, a piston, a push rod and a spring, wherein the piston is arranged in the pressure-bearing sealed container and divides the interior of the pressure-bearing sealed container into a high-pressure saturated liquid cavity and a spring cavity; the high-pressure saturated liquid in the pressure-bearing sealed container generates acting force to the piston along with the temperature change, and the elastic force of the spring is balanced with the acting force of the high-pressure saturated liquid to the piston, so that the piston and a push rod connected with the piston are driven to displace to drive a driven body. The device utilizes the pressure that high pressure saturated state liquid evaporation or condensation produced as power, need not any power equipment, simple structure, convenient to use.
Description
Technical Field
The invention relates to a thermal actuator which realizes driving action by means of driving force generated by liquid in a high-pressure saturated state along with temperature change.
Background
In daily life, the air supply direction of the air conditioner louver is often required to be adjusted, the fire damper is opened and closed, the louver is opened and closed, and the opening of the valves such as cooling and heating are required to be adjusted.
The louver at the air supply end of the air conditioner is generally divided into a fixed type and an adjustable type, wherein the adjustable type is that the louver is driven by a motor to rotate to adjust the air supply direction; the fixed type can not realize the change of the air supply angle because the louver can not rotate. For the adjustable shutter, as the driving motor consumes electric energy, the electric leakage risk is also faced when the shutter works in a humid environment; for the fixed shutter, because the fixed shutter can not change the air supply angle of the air conditioner, the airflow organization can not change along with the change of seasons, the conditions that people can be easily sick by direct blowing of the airflow in summer and the room can not be rapidly heated by side blowing of the airflow in winter occur.
An electric fire damper is usually arranged on a pipeline of an air supply and ventilation system of an air conditioner, when the temperature reaches 70 ℃, a temperature sensor receives a signal, then an electric actuator acts to close a valve, the general cost is high, and when a power system is closed, a state that the electric actuator cannot be closed can occur; when the temperature of airflow is higher than 70 ℃, a temperature fuse acts, the valve is closed by spring force, and the valve needs to be manually reset, so that the use is inconvenient.
For some sunlight rooms or household sun-shading shutters, manual operation, electric remote control or full-automatic operation are generally available. The manual sun-shading shutter only has two states of opening or closing generally, cannot change the opening degree along with the change of the outdoor environment, is not beneficial to indoor lighting and needs to be operated by personnel, and has great limitation; the electrically remote-controlled shutter can manually change the angle of the shutter according to the change of the outdoor environment, but also needs to be operated by a person and consumes electric energy; the full-automatic intelligent control system for the shutter can automatically adjust the heat energy entering the room according to the weather conditions every day, but has large initial investment and needs to consume a large amount of electric energy.
Disclosure of Invention
The invention aims to provide a thermal actuator which realizes driving action by using displacement change generated by temperature change as driving force, aiming at the technical defects in the prior art.
The technical scheme adopted for realizing the purpose of the invention is as follows:
a thermal actuator comprises a pressure-bearing sealed container, a piston, a push rod and a spring, wherein the piston is arranged in the pressure-bearing sealed container and divides the interior of the pressure-bearing sealed container into a high-pressure saturated liquid cavity and a spring cavity, the high-pressure saturated liquid cavity is used for filling high-pressure saturated liquid, the spring is arranged in the spring cavity, one end of the push rod is fixedly connected with the piston, and the other end of the push rod penetrates through the spring and the pressure-bearing sealed container to be connected with a driven body; the high-pressure saturated liquid loaded in the pressure-bearing sealed container generates acting force on the piston along with the temperature change, and the elastic force of the spring is balanced with the acting force of the high-pressure saturated liquid on the piston, so that the piston and a push rod connected with the piston are driven to generate displacement, and the driven body is driven; when the filled high-pressure saturated liquid reaches a high-pressure saturated state, the maximum or minimum position of the driven body is corresponded.
The spring is perpendicular to the piston and fixedly connected with the piston.
The high-pressure saturated liquid is one or a combination of more of butane, isobutane, difluoroethane, tetrafluoroethane and propane.
The pressure-bearing sealed container comprises a container body with an opening at one side, and the opening side of the container body is sealed by a sealing plate to form the sealed container.
The piston is connected with the push rod through threads or welding.
Compared with the prior art, the invention has the beneficial effects that:
1. the thermal execution device of the invention uses the positive pressure or the negative pressure generated by the evaporation or the condensation of the liquid in the liquid cavity in the high-pressure saturated state as the power to drive the push rod to move so as to realize the functions of air supply direction, opening and closing of the fire damper and the like, does not need any electric equipment, and has simple structure and convenient use.
2. When the thermal execution device is used for the sun blind, the heat energy and the lighting quantity entering the room can be automatically adjusted according to the weather condition every day, so that the energy consumption of the building can be reduced, and the energy consumption of the air conditioner in an air-conditioned room is reduced.
3. The thermal actuator can adjust the displacement by applying different high-pressure saturated state liquids and matching different springs, and is convenient to adapt to different use requirements.
Drawings
Fig. 1 is a schematic structural diagram of a thermal actuator according to the present invention.
Detailed Description
The invention is described in detail below with reference to the figures and specific examples.
The structure schematic diagram of the thermal actuator is shown in fig. 1, and the thermal actuator comprises a pressure-bearing sealed container, a piston 3, a push rod 5 and a spring 4, wherein the piston 3 is arranged in the pressure-bearing sealed container and divides the interior of the pressure-bearing sealed container into a high-pressure saturated liquid cavity 7 and a spring cavity 6, the high-pressure saturated liquid cavity 7 is used for filling high-pressure saturated liquid, the spring 4 is arranged in the spring cavity 6, one end of the push rod 5 is fixedly connected with the piston 3, and the other end of the push rod 5 penetrates through the spring 4 and the pressure-bearing sealed container to be connected with a driven body. The acting force of the high-pressure saturated liquid loaded in the pressure-bearing sealed container on the piston 3 is changed along with the temperature change, and the elastic force of the spring 4 is balanced with the acting force of the high-pressure saturated liquid on the piston 3, so that the piston and a push rod connected with the piston are driven to displace, and the driven body is driven to generate corresponding action. When the filled high-pressure saturated liquid reaches a high-pressure saturated state, the maximum or minimum position of the driven body is corresponded.
In this embodiment, the spring 4 is perpendicular to the piston 3 and is fixedly connected to the piston 3. The spring 4 and the piston 3 can be connected by bonding or welding.
In this embodiment, the pressure-bearing sealed container includes a container body 2 with an opening on one side, and the opening side of the container body 2 is sealed by a sealing plate 1 to form a sealed container. Wherein, the piston 3 and the push rod 5 can be connected by screw thread or welding.
The high-pressure saturated liquid in the pressure-bearing sealed container can be filled in a factory or by a user. The high pressure saturated liquid filling may be workplace specific. The high-pressure saturated liquid is selected according to the working environment, and preferably one or a combination of more of butane, isobutane, difluoroethane, tetrafluoroethane and propane is used.
According to the property of the liquid in the high-pressure saturated state, the temperature and the pressure of the liquid in the saturated state correspond to each other one by one, the saturated liquid is evaporated or steam is condensed along with the change of the temperature, the pressure of the liquid in the high-pressure saturated state in the pressure-bearing sealed container is changed along with the change of the temperature, so that the acting force of the liquid in the high-pressure saturated state on the piston 3 is changed, the spring 4 is stretched or compressed, the piston 4 is displaced, the position of the piston 4 driving the push rod 5 is changed, the push rod 5 driving the driven body to perform corresponding actions until the forces on two sides of the piston 4 are balanced, the displacement of the push rod 5 is stopped, and the driven body stops acting. The angle of the shutter or the opening and closing state of the valve can be changed according to the position change of the push rod 5.
Table 1 lists the pressure values at 0 ℃ to 50 ℃ for several high pressure saturated liquids that are common.
Table 1: pressure values of several high-pressure saturated liquids at 0-50 deg.C
Unit: bar
| Temperature/. degree.C | Butane | Isobutane | Difluoroethane | Tetrafluoroethane | Propane |
| 0 | 1.03 | 1.59 | 2.67 | 2.92 | 4.71 |
| 10 | 1.48 | 2.22 | 3.74 | 4.15 | 6.32 |
| 20 | 2.06 | 3.04 | 5.15 | 5.72 | 8.32 |
| 30 | 2.81 | 4.07 | 6.91 | 7.70 | 10.74 |
| 40 | 3.75 | 5.36 | 9.12 | 10.16 | 13.65 |
| 50 | 4.91 | 6.91 | 11.82 | 13.17 | 17.11 |
The present invention will be described in detail below with reference to butane as an example.
Example 1: application in multi-vane regulating valve
Butane liquid is filled in a high-pressure saturated liquid cavity of the pressure-bearing sealed container, the working interval of the butane is 16-40 ℃, a proper spring is selected to be combined with the butane liquid, the tail end of the push rod 5 is provided with a split multi-blade adjusting valve, and the driven body is a valve plate of the multi-blade adjusting valve. The air outlet temperature is low when the air conditioner operates in summer, butane feels temperature reduction and condensation, the pressure in the pressure-bearing sealed container is reduced until the pressure reaches corresponding saturated pressure and is not changed, the pressure acting on the piston is reduced, the spring 4 extends until the force is balanced with the pressure of the butane side, the position of the push rod is subjected to negative displacement along with the extension of the spring, so that the valve plate of the split multi-leaf regulating valve is changed in the vertical direction, airflow tissues are blown downwards against the wall, and the comfort of a human body is improved; the air outlet temperature is higher when the air conditioner operates in winter, the butane liquid absorbs heat and evaporates after the temperature is raised, the pressure in the pressure-bearing sealed container does not change until the pressure reaches the corresponding saturated pressure, the pressure acting on the piston is increased, the spring is compressed until the spring force is balanced with the pressure of the butane side, the position of the push rod is positively displaced along with the compression of the spring, the force acts on the piston to push the push rod to be displaced until the spring force is balanced with the pressure, at the moment, the valve plate of the double-leaf regulating valve is in a vertical state, the air flow organization blows downwards vertically, and the room can be rapidly heated.
Example 2: application in 70-degree fire damper
The 70-degree fire-proof valve is commonly used on pipelines of an air supply and ventilation system of an air conditioner and is normally opened at ordinary times, when the thermal actuating device is used, the tail end of a push rod 5 is connected with a valve plate of the fire-proof valve serving as a driven body, when a fire disaster happens, the temperature of airflow rises, butane liquid in a pressure-bearing sealed container absorbs heat and evaporates, the pressure in the container does not change until reaching corresponding saturated pressure, the pressure acting on a piston increases, a spring is compressed until the spring force is balanced with the pressure of the butane side, the position of the push rod also generates positive displacement along with the compression of the spring, and when the external temperature reaches 70 degrees, the fire-proof. When a fire disaster is extinguished, the temperature of the air flow is reduced, butane steam in the pressure-bearing sealed container is condensed, the pressure in the container is reduced, the spring is extended, the push rod is in negative displacement, and the fire-proof valve is opened.
Example 3: application on louver window
For some sunlight rooms or household sun-shading shutters, the tail end of the push rod is connected with a valve plate serving as a driven shutter, the temperature at different times of the day is different, the angle of the shutter can be adjusted through the heat push rod, and the functions of sun shading, dimming, ventilation and the like are achieved. The outdoor air temperature is slightly low in the morning, the thermal push rod device keeps the louver at the open position, the indoor space is in a good lighting and ventilation state, along with the change of the time, the air temperature rises, the liquid in the pressure-bearing sealed container absorbs heat and evaporates, the pressure in the container rises, the pressure acting on the piston increases, the spring is compressed until the spring force and the butane side pressure are balanced, the push rod position also generates positive displacement along with the compression of the spring, the angle of the louver changes, the lighting quantity changes, when the positive noon is reached, the air temperature reaches the peak value, the louver is completely closed, until the afternoon, the air temperature slowly drops, the liquid in the pressure-bearing sealed container condenses and releases heat, the pressure in the container drops, the pressure acting on the piston decreases, the spring extends, the push rod negatively displaces, the angle.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.
Claims (5)
1. A thermal actuator is characterized by comprising a pressure-bearing sealed container, a piston, a push rod and a spring, wherein the piston is arranged in the pressure-bearing sealed container and divides the interior of the pressure-bearing sealed container into a high-pressure saturated liquid cavity and a spring cavity, the high-pressure saturated liquid cavity is used for filling high-pressure saturated liquid, the spring is arranged in the spring cavity, one end of the push rod is fixedly connected with the piston, and the other end of the push rod penetrates through the spring and the pressure-bearing sealed container to be connected with a driven body; the high-pressure saturated liquid loaded in the pressure-bearing sealed container generates acting force on the piston along with the temperature change, and the elastic force of the spring is balanced with the acting force of the high-pressure saturated liquid on the piston, so that the piston and a push rod connected with the piston are driven to generate displacement, and the driven body is driven; when the filled high-pressure saturated liquid reaches a high-pressure saturated state, the maximum or minimum position of the driven body is corresponded.
2. A thermal actuator according to claim 1, wherein the spring is arranged perpendicular to the piston and is fixedly connected to the piston.
3. The thermal actuator according to claim 1 or 2, wherein the high pressure saturated liquid is one or a combination of butane, isobutane, difluoroethane, tetrafluoroethane and propane.
4. A thermal actuator as claimed in claim 1 or 2, wherein the pressure-tight sealed container comprises a container body with an opening at one side, and the opening side of the container body is sealed by a sealing plate to form a sealed container.
5. A thermal actuator according to claim 1 or 2, wherein the piston is screwed or welded to the push rod.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911303242.7A CN110953401A (en) | 2019-12-17 | 2019-12-17 | Thermal actuator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911303242.7A CN110953401A (en) | 2019-12-17 | 2019-12-17 | Thermal actuator |
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| Publication Number | Publication Date |
|---|---|
| CN110953401A true CN110953401A (en) | 2020-04-03 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911303242.7A Pending CN110953401A (en) | 2019-12-17 | 2019-12-17 | Thermal actuator |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111678192A (en) * | 2020-06-08 | 2020-09-18 | 熊群英 | From type of ventilating heat preservation wall for bathing place |
| CN112075269A (en) * | 2020-08-07 | 2020-12-15 | 宁波工程学院 | Automatic ventilation system of greenhouse shed |
| CN114321574A (en) * | 2021-12-13 | 2022-04-12 | 中铁二局集团建筑有限公司 | Monitoring device for water level monitoring |
-
2019
- 2019-12-17 CN CN201911303242.7A patent/CN110953401A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111678192A (en) * | 2020-06-08 | 2020-09-18 | 熊群英 | From type of ventilating heat preservation wall for bathing place |
| CN112075269A (en) * | 2020-08-07 | 2020-12-15 | 宁波工程学院 | Automatic ventilation system of greenhouse shed |
| CN114321574A (en) * | 2021-12-13 | 2022-04-12 | 中铁二局集团建筑有限公司 | Monitoring device for water level monitoring |
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