CN215172439U - Throttling device based on shape memory alloy - Google Patents
Throttling device based on shape memory alloy Download PDFInfo
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- CN215172439U CN215172439U CN202120692462.XU CN202120692462U CN215172439U CN 215172439 U CN215172439 U CN 215172439U CN 202120692462 U CN202120692462 U CN 202120692462U CN 215172439 U CN215172439 U CN 215172439U
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Abstract
The utility model discloses a throttling device based on shape memory alloy, which comprises a valve body, a longitudinal length control part and a transverse length control part, wherein a refrigerant channel is arranged in the valve body; the longitudinal length control member includes a longitudinal movement driving assembly and a longitudinal boundary rod as a longitudinal boundary of the refrigerant passage; a longitudinal movement driving assembly connected to the longitudinal boundary rod to drive the longitudinal boundary rod to move longitudinally, thereby controlling a longitudinal length of the refrigerant channel; the transverse length control member includes a transverse displacement drive assembly including a shape memory alloy body and a transverse drive assembly adapted to warm or cool the shape memory alloy body to deform the shape memory alloy body, and a transverse boundary rod as a transverse boundary of the refrigerant passageway, the transverse boundary rod being connected to the shape memory alloy body. The utility model discloses the aperture that can realize the refrigerant passageway is the accurate control under the two-dimentional, improves the execution accuracy of aperture control.
Description
Technical Field
The utility model relates to a throttling arrangement based on shape memory alloy belongs to refrigeration technology field.
Background
At present, in the technical field of refrigeration, a throttling device is an important component in a refrigeration system, and has the function of throttling and depressurizing a high-temperature high-pressure liquid refrigerant flowing out of a condenser to obtain a low-temperature low-pressure two-phase refrigerant fluid, and the throttling device is used for adjusting the flow of the refrigerant entering an evaporator to provide the most suitable refrigeration effect for the system.
The variable displacement compressor controls the displacement of the compressor through a variable displacement valve, the variable displacement valve of the compressor is divided into an internal control valve and an external control valve, and the external control valve is divided into an electromagnetic mode and an electric mode. The electric external control valve is driven by a stepping motor, and the transmission rod moves upwards or downwards by changing the pulse number of the stepping motor. However, the precision of the pulse steps is limited, the precision of the opening degree of the valve is limited, and the valve cannot adapt to certain variable working condition occasions requiring very high precision.
Disclosure of Invention
The utility model aims to solve the technical problem that overcome prior art's defect, provide a throttling arrangement based on shape memory alloy, it can realize the aperture of refrigerant passageway accurate control under the two-dimentional, improves the execution accuracy of aperture control.
In order to solve the technical problem, the technical scheme of the utility model is that: a shape memory alloy based throttle device comprising:
the valve body is internally provided with a refrigerant channel;
a longitudinal length control member including a longitudinal movement drive assembly and a longitudinal boundary rod as a longitudinal boundary of the refrigerant channel; the longitudinal movement driving assembly is connected with the longitudinal boundary rod to drive the longitudinal boundary rod to move longitudinally, so as to control the longitudinal length of the refrigerant channel;
a transverse length control member comprising a transverse movement drive assembly and a transverse boundary rod that serves as a transverse boundary of the refrigerant passageway, the transverse movement drive assembly comprising a shape memory alloy body and a transverse drive assembly adapted to de-heat the shape memory alloy body to deform the shape memory alloy body, the transverse boundary rod being connected to the shape memory alloy body to move transversely upon deformation of the shape memory alloy body to control the transverse length of the refrigerant passageway.
Further, the transverse boundary bar is adapted to at least produce a transverse deformation movement upon contact and continued depression of the longitudinal boundary bar.
Further, the longitudinal movement driving assembly includes a motor and a power transmission mechanism, and the motor is connected to the longitudinal boundary bar through the power transmission mechanism.
Further, the power transmission mechanism is a screw rod and nut pair, the screw rod is connected with an output shaft of the motor, the nut is connected with the longitudinal boundary rod, and a movement limiting mechanism which limits the longitudinal movement of the nut when the motor drives the screw rod to rotate is arranged between the nut and the valve body.
Further, the transverse driving assembly comprises a power supply, the power supply is electrically connected with the shape memory alloy body, and the power supply is suitable for heating the shape memory alloy body and changing the transverse deformation quantity of the shape memory alloy body by changing the voltage of the power supply.
Further, the shape memory alloy body is a spring made of a shape memory alloy material.
Further, the lateral border bar is slidably connected to the valve body.
Further, the throttling device based on the shape memory alloy also comprises a temperature sensor which is suitable for acquiring a temperature signal of the shape memory alloy body so as to know the transverse deformation quantity of the shape memory alloy body.
The utility model also provides a method of throttling arrangement control channel aperture based on shape memory alloy, the step of method includes:
the transverse deformation of the shape memory alloy body is changed by transversely moving the driving component, and the longitudinal displacement of the longitudinal boundary rod is changed by longitudinally moving the driving component, so that the position opening of the refrigerant channel is accurately controlled.
Further, the method also comprises the following steps:
obtaining the current position opening degree of the refrigerant channel: acquiring the temperature of the shape memory alloy body to know the transverse deformation amount of the shape memory alloy body; the driving source of the longitudinal movement driving component is a motor, and the longitudinal displacement of the longitudinal boundary rod is known by collecting the pulse number input into the motor.
After the technical scheme is adopted, the utility model discloses a shape memory alloy body combines with electrodynamic type external control valve, the spring and the motor that use shape memory alloy material to make are regarded as the drive element of two dimensions respectively, shape memory alloy body can have corresponding temperature feedback device (temperature sensor) simultaneously, the pulse through the temperature of feedback and motor driver input motor can obtain the current position aperture of refrigerant passageway, thereby can be well through the pulse number of control mains voltage and input motor, change the horizontal deformation volume of shape memory alloy body and the vertical displacement volume of vertical boundary pole, the realization is to the accurate control of the position aperture of refrigerant passageway. The utility model discloses both improved the execution precision of throttling arrangement aperture control on original basis, also had the feedback function to control effect, had advantages such as with low costs, precision height, good reliability simultaneously.
Drawings
Fig. 1 is a schematic structural diagram of a throttling device based on a shape memory alloy according to the present invention.
Detailed Description
In order that the present invention may be more readily and clearly understood, the following detailed description of the present invention is provided in connection with the accompanying drawings.
Example one
As shown in fig. 1, a shape memory alloy based throttle device comprises:
a refrigerant channel 7 is arranged in the valve body 3;
a longitudinal length control part including a longitudinal movement driving assembly and a longitudinal boundary rod 8 as a longitudinal boundary of the refrigerant passage 7; a longitudinal movement driving assembly connected to the longitudinal boundary rod 8 to drive the longitudinal boundary rod 8 to move longitudinally, thereby adjusting the longitudinal length of the refrigerant channel 7;
a transverse length control member comprising a transverse movement drive assembly and a transverse boundary rod 6 as a transverse boundary of the refrigerant passage 7, the transverse movement drive assembly comprising a shape memory alloy body and a transverse drive assembly adapted to de-heat the shape memory alloy body to deform the shape memory alloy body, the transverse boundary rod 6 being connected to the shape memory alloy body to move transversely upon deformation of the shape memory alloy body to adjust the transverse length of the refrigerant passage 7.
The shape memory alloy material is a special functional material integrating perception and drive, and has peculiar shape memory effect and super-elasticity besides the strength, plasticity, ductility and conductivity of metal, namely, after the shape memory alloy at low temperature deforms under the action of external force, if the shape memory alloy is heated to a temperature exceeding the phase transformation point of the shape memory alloy, the shape memory alloy can recover to the shape of the state before deformation; and under the action of external force, it can produce strain which is far greater than its elastic limit strain quantity, and after the strain is unloaded, it can be automatically restored to original state. Aiming at the characteristics of the shape memory alloy material, the opening degree of the valve port can be changed by controlling the voltage and changing the temperature of the shape memory alloy material, and the position feedback of the throttling device can be carried out according to the temperature.
In the present embodiment, the refrigerant channel 7 is rectangular, and its one longitudinal boundary is a longitudinal boundary rod 8, the other longitudinal boundary may be the valve body 3, its one lateral boundary is a lateral boundary rod 6, and the other lateral boundary may be the valve body.
The transverse border bar 6 is adapted to at least undergo transverse deformation movement upon contact and continued depression of the longitudinal border bar 8, and the transverse border bar 6 may be made of a flexible material such that the transverse border bar 6 is compressed by the longitudinal border bar 8 and is transversely deformed under compression by the longitudinal border bar 8; the original length can be recovered under the action of the solution of external force.
Specifically, as shown in fig. 1, the longitudinal movement driving assembly may be a structure including a motor 1 and a power transmission mechanism 2, and the motor 1 is connected to the longitudinal boundary bar 8 through the power transmission mechanism 2.
In the embodiment, the power transmission mechanism 2 can adopt a screw-nut pair, the screw is connected with an output shaft of the motor 1, the nut is connected with the longitudinal boundary rod 8, and a movement limiting mechanism which limits the longitudinal movement of the nut when the motor 1 drives the screw to rotate is arranged between the nut and the valve body 3; the motor 1 may be a stepping motor, and in other embodiments, the longitudinal movement driving assembly may be implemented by using an air cylinder, and the air cylinder drives the longitudinal boundary rod 8 to longitudinally extend and retract.
In this embodiment, the transverse driving assembly may be a structure including a power source 4, the power source 4 is electrically connected to the shape memory alloy body, the power source 4 is adapted to heat the shape memory alloy body and change the transverse deformation amount of the shape memory alloy body by changing the voltage of the power source 4.
In particular, the shape memory alloy body is a spring 5 made of a shape memory alloy material.
In particular, the transverse boundary rod 6 is slidingly connected to the valve body 3.
Specifically, the temperature sensor is suitable for acquiring a temperature signal of the shape memory alloy body so as to know the transverse deformation quantity of the shape memory alloy body. The temperature sensor receives the temperature of the shape memory alloy body and transmits a temperature signal to the controller, and the controller converts the received temperature signal into a power supply voltage and further converts the power supply voltage into deformation displacement of the shape memory alloy body, so that the feedback of the transverse opening degree of the refrigerant channel 7 is obtained.
In the present embodiment, the refrigerant flows in the refrigerant channel 7 perpendicularly to the surface of fig. 1, and its outer boundary is constituted by the longitudinal boundary bars 8 and the transverse boundary bars 6. When the refrigerant flow of the system needs to be changed, the pulse signal input into the motor 1 is controlled to be changed, and the motor 1 pushes the longitudinal boundary rod 8 to make vertical (longitudinal) displacement through the power transmission mechanism 2, so that the longitudinal length of the refrigerant channel 7 is changed; the voltage of the power supply 4 is controlled to change the current heat effect strength of the spring 5, so that the temperature and the deformation quantity of the spring are changed, the spring 5 pushes the transverse boundary rod 6 to move transversely, the transverse length of the refrigerant channel 7 is changed, the refrigerant flow in the refrigerant channel 7 is accurately adjusted, and when the longitudinal boundary rod 8 moves downwards to be in contact with the transverse boundary rod 6, the transverse boundary rod 6 is stressed and compressed and can slide horizontally along the bottom of the longitudinal boundary rod 8; when the longitudinal border bar 8 is moved upwards, the transverse border bar 6 is stretched and still slides horizontally along the bottom of the longitudinal border bar 8. Meanwhile, the flow area of the refrigerant passage 7 is calculated according to the pulse signal input to the motor 1 and the temperature signal of the spring 5, so that a feedback value of the opening degree of the throttling device is obtained. When the flow of the refrigerant needs to be reduced, the pulse number input into the motor 1 and the voltage of the power supply 4 are increased according to the target flow, the longitudinal boundary rod 8 moves downwards and compresses the transverse boundary rod 6, the transverse boundary rod 6 is pushed by the spring 5 to move leftwards, and the reduction of the flow area of the refrigerant channel 7 is realized; on the contrary, when the refrigerant flow needs to be increased, the pulse number of the motor 1 and the voltage of the power supply 4 are reduced, the longitudinal boundary rod 8 and the transverse boundary rod 6 move upwards and rightwards respectively, the sectional area of the refrigerant channel 7 is increased, and the increase of the refrigerant flow is realized.
Example two
In one embodiment, a method for controlling opening of a passage in a throttling device based on a shape memory alloy includes the steps of:
the transverse deformation amount of the shape memory alloy body is changed by transversely moving the driving assembly, and the longitudinal displacement amount of the longitudinal boundary rod 8 is changed by longitudinally moving the driving assembly, so that the accurate control of the position opening of the refrigerant channel 7 is realized.
The method also comprises the following steps:
obtaining the current position opening degree of the refrigerant passage 7: acquiring the temperature of the shape memory alloy body to know the transverse deformation amount of the shape memory alloy body; the driving source of the longitudinal movement driving component is the motor 1, and the longitudinal displacement of the longitudinal boundary rod 8 is known by collecting the pulse number input into the motor 1.
The above-mentioned embodiments further explain in detail the technical problems, technical solutions and advantages solved by the present invention, and it should be understood that the above only is a specific embodiment of the present invention, and is not intended to limit the present invention, and any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the scope of the present invention.
In the description of the present invention, it is to be understood that the terms indicating orientation or positional relationship are based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplification of description, and do not indicate or imply that the equipment or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate the position or positional relationship based on the position or positional relationship shown in the drawings, or the position or positional relationship which is usually placed when the product of the present invention is used, and are only for convenience of description and simplification of the description, but do not indicate or imply that the device or element referred to must have a specific position, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.
Furthermore, the terms "horizontal", "vertical", "overhang" and the like do not imply that the components are required to be absolutely horizontal or overhang, but may be slightly inclined. For example, "horizontal" merely means that the direction is more horizontal than "vertical" and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.
In the present disclosure, unless otherwise expressly stated or limited, the first feature may comprise both the first and second features directly contacting each other, and also may comprise the first and second features not being directly contacting each other but being in contact with each other by means of further features between them. Also, the first feature being above, on or above the second feature includes the first feature being directly above and obliquely above the second feature, or merely means that the first feature is at a higher level than the second feature. A first feature that underlies, and underlies a second feature includes a first feature that is directly under and obliquely under a second feature, or simply means that the first feature is at a lesser level than the second feature.
Claims (8)
1. A shape memory alloy based throttling device, comprising:
the refrigerant valve comprises a valve body (3), wherein a refrigerant channel (7) is arranged in the valve body (3);
a longitudinal length control means comprising a longitudinal movement drive assembly and a longitudinal boundary rod (8) as a longitudinal boundary of the refrigerant channel (7); the longitudinal movement driving assembly is connected with the longitudinal boundary rod (8) to drive the longitudinal boundary rod (8) to move longitudinally, so as to adjust the longitudinal length of the refrigerant channel (7);
a transverse length control member comprising a transverse movement drive assembly and a transverse boundary rod (6) as a transverse boundary of the refrigerant channel (7), the transverse movement drive assembly comprising a shape memory alloy body and a transverse drive assembly adapted to warm or cool the shape memory alloy body to deform the shape memory alloy body, the transverse boundary rod (6) being connected to the shape memory alloy body to move transversely upon deformation of the shape memory alloy body to adjust the transverse length of the refrigerant channel (7).
2. The shape memory alloy-based restriction device of claim 1,
the transverse boundary bar (6) is adapted to at least produce a transverse deformation movement upon contact and continued depression of the longitudinal boundary bar (8).
3. The shape memory alloy-based restriction device of claim 1,
the longitudinal movement driving assembly comprises a motor (1) and a power transmission mechanism (2), and the motor (1) is connected with the longitudinal boundary rod (8) through the power transmission mechanism (2).
4. The shape memory alloy-based restriction device of claim 3,
the power transmission mechanism (2) is a screw rod and nut pair, the screw rod is connected with an output shaft of the motor (1), the nut is connected with the longitudinal boundary rod (8), and a movement limiting mechanism which limits the longitudinal movement of the nut when the motor (1) drives the screw rod to rotate is arranged between the nut and the valve body (3).
5. The shape memory alloy-based restriction device of claim 1,
the transverse driving assembly comprises a power supply (4), the power supply (4) is electrically connected with the shape memory alloy body, the power supply (4) is suitable for heating the shape memory alloy body, and the transverse deformation quantity of the shape memory alloy body is changed by changing the voltage of the power supply (4).
6. The shape memory alloy-based restriction device of claim 1,
the shape memory alloy body is a spring (5) made of a shape memory alloy material.
7. The shape memory alloy-based restriction device of claim 1,
the transverse boundary rod (6) is connected to the valve body (3) in a sliding manner.
8. The shape memory alloy-based restriction device of claim 1,
the temperature sensor is suitable for acquiring a temperature signal of the shape memory alloy body so as to know the transverse deformation quantity of the shape memory alloy body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202120692462.XU CN215172439U (en) | 2021-04-06 | 2021-04-06 | Throttling device based on shape memory alloy |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202120692462.XU CN215172439U (en) | 2021-04-06 | 2021-04-06 | Throttling device based on shape memory alloy |
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| CN215172439U true CN215172439U (en) | 2021-12-14 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113028095A (en) * | 2021-04-06 | 2021-06-25 | 常州天目智能科技有限公司 | Throttling device based on shape memory alloy and method for controlling opening degree of channel |
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- 2021-04-06 CN CN202120692462.XU patent/CN215172439U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113028095A (en) * | 2021-04-06 | 2021-06-25 | 常州天目智能科技有限公司 | Throttling device based on shape memory alloy and method for controlling opening degree of channel |
| CN113028095B (en) * | 2021-04-06 | 2024-06-18 | 常州天目智能科技有限公司 | Throttling device based on shape memory alloy and method for controlling opening of channel |
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