CN211371447U

CN211371447U - Thermal actuator

Info

Publication number: CN211371447U
Application number: CN201922277405.0U
Authority: CN
Inventors: 杨永安; 黄成军; 郭桂梅; 丛萌
Original assignee: Tianjin University of Commerce
Current assignee: Tianjin University of Commerce
Priority date: 2019-12-17
Filing date: 2019-12-17
Publication date: 2020-08-28
Anticipated expiration: 2029-12-17

Abstract

The utility model discloses a thermal actuator aims at providing one kind and relies on the temperature change and the displacement that produces changes as drive power and realizes the thermal actuator of drive action. 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 cavity is filled with high-pressure saturated liquid, the acting force of the high-pressure saturated liquid on the piston changes along with the temperature change, the elastic force of the spring is balanced with the acting force of the high-pressure saturated liquid on the piston, and therefore 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

Thermal actuator

Technical Field

The utility model relates to a thermal actuator which realizes the driving action by the driving force generated by the liquid in the high-pressure saturation state along with the 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.

SUMMERY OF THE UTILITY MODEL

The utility model aims at the technical defect who exists among the prior art, and provide a displacement that relies on temperature variation and produce and change as drive power and realize the heating power final controlling element of drive action.

For realizing the utility model discloses a technical scheme that the purpose adopted is:

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 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 butane, isobutane, difluoroethane, tetrafluoroethane or 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 beneficial effects of the utility model are that:

1. the utility model discloses a thermal execution device utilizes the normal pressure or the negative pressure that evaporation or condensation of high pressure saturated state liquid intracavity liquid produced as power, and the drive push rod removes the function such as opening and close that realizes air supply direction, fire prevention valve, need not any power equipment, simple structure, convenient to use.

2. When the utility model discloses a heating power final controlling element is used for sunshade shutter, can get into indoor heat energy and daylighting volume according to weather conditions automatically regulated every day, can reduce the building energy consumption, has reduced the air conditioner energy consumption in the air conditioning room.

3. The utility model discloses a thermal actuator uses different high pressure saturated state liquid and different spring cooperations can adjust the size of displacement, is convenient for adapt to different operation requirements.

Drawings

Fig. 1 is a schematic structural diagram of a thermal actuator according to the present invention.

Detailed Description

The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.

The utility model discloses a thermal actuator's structural schematic diagram is shown in fig. 1, including pressure-bearing sealed container, piston 3, push rod 5, spring 4, piston 3 arranges in the pressure-bearing sealed container and will pressure-bearing sealed container internal partitioning becomes high pressure saturated state liquid chamber 7 and spring chamber 6, it has high pressure saturated state liquid to fill in the high pressure saturated state liquid chamber 7, be provided with in the spring chamber 6 spring 4, push rod 5 one end with 3 fixed connection of piston, the other end passes spring 4 reaches pressure-bearing sealed container is connected with the 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

70 degree fire prevention valve is commonly used in air conditioner air supply, on the ventilation system pipeline, normally open at ordinary times, use the utility model discloses a thermal execution device, the end of push rod 5 is connected with the valve block as driven body's fire prevention valve, when the conflagration takes place, air current temperature risees, butane liquid heat absorption evaporation in the pressure-bearing sealed container, the container internal pressure risees and no longer changes until reaching behind the saturation pressure that corresponds, the pressure increase of effect on the piston, the spring is compressed to spring force and butane lateral pressure balance till, the push rod position also takes place positive displacement along with the spring compression, make the fire prevention valve close completely when outside temperature reachs 70 degrees. 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

To some sunshine rooms or domestic shutter, use the utility model discloses a heating power push rod device, the push rod end links to each other with the valve block as being driven the shutter, and the temperature of every day different hours is different, and the angle of shutter can be adjusted to the heating power push rod, plays functions such as sunshade, adjusts luminance, ventilates. 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, a plurality of improvements and decorations can be made without departing from the principle of the present invention, and these improvements and decorations should also be regarded as the protection scope of the present invention.

Claims

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 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. A thermal actuator according to claim 1 or 2, wherein the high pressure saturated liquid is butane, isobutane, difluoroethane, tetrafluoroethane or 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.