CN108007592B

CN108007592B - Temperature measuring device with filtering device

Info

Publication number: CN108007592B
Application number: CN201711222475.5A
Authority: CN
Inventors: 李明守
Original assignee: Individual
Current assignee: Individual
Priority date: 2017-11-28
Filing date: 2017-11-28
Publication date: 2021-08-27
Anticipated expiration: 2037-11-28
Also published as: CN108007592A

Abstract

The invention discloses a temperature measuring device with a filtering device, which comprises a temperature sensor, a control circuit and a mechanical filtering device. The filtering device comprises a columnar energy storage part and a flaky first fin part. At least one surface of the energy accumulating portion is provided with a first fin portion which is in thermal contact with and fixed to the energy accumulating portion. The energy storage part is provided with a blind hole-shaped temperature measuring part extending along the axial direction of the energy storage part; the temperature sensor is assembled with the temperature measuring part and detects the temperature of the blind end part of the temperature measuring part. The temperature measuring device can filter the ultralow frequency disturbance signal through the assembled mechanical filter device, and accurately detects the temperature of the fluid, so that disturbance signal interference is avoided in the heat application treatment, the fluctuation range of the fluid temperature is extremely small, the fluid temperature is easy to be stabilized at a set value, the consumed time is short, and the energy consumption is favorably saved.

Description

Temperature measuring device with filtering device

Technical Field

The invention relates to a temperature measuring device, in particular to a temperature measuring device with a filtering device, which is applied to temperature signal detection and belongs to the field of temperature signal detection.

Background

The fluid is heated, refrigerated and the like, the temperature distribution is uneven, a natural convection flow field is generated under the action of gravity, a large number of advection, turbulence and turbulence areas exist in the fluid, and the temperature distribution of the fluid is uneven. The fluid with uneven temperature distribution flows to generate disturbance interference signals on the temperature detection points to form ultralow frequency disturbance signals with the period reaching the order of several minutes, and the electronic filter is difficult to filter, so that the temperature measuring device in the prior art cannot accurately measure the temperature of the fluid. Therefore, it is highly desirable to develop a temperature measuring device with a filtering device, which can filter the ultra-low frequency disturbance signal to accurately measure the temperature, so that the fluid temperature can be more easily stabilized at the set value.

Disclosure of Invention

Aiming at the problems in the prior art, the invention aims to provide a temperature measuring device with a filtering device, which is applied to temperature signal measurement and has the function of filtering ultralow frequency disturbance signals, so that the ultralow frequency disturbance signals are filtered to accurately measure the temperature, and the temperature of the fluid is easily stabilized at a set value.

The technical scheme of the invention is as follows:

the utility model provides a temperature measuring device with filter equipment, its design point lies in: the temperature measuring device comprises a temperature sensor, a mechanical filtering device and a control circuit, wherein the mechanical filtering device is suitable for filtering ultralow frequency disturbance signals, and the control circuit is suitable for acquiring and processing temperature signals; the filtering device at least comprises a columnar energy storage part and a sheet-shaped first fin part, wherein a plurality of first fin parts are arranged on at least one surface of the energy storage part, the first fin parts are in thermal contact with the energy storage part, and the first fin parts and the energy storage part are fixed; the energy storage part is internally provided with a blind hole-shaped temperature measuring part extending along the axial direction of the energy storage part and is suitable for the temperature sensor to detect the temperature of the blind end part of the temperature measuring part; the temperature sensor is assembled with the temperature measuring part of the filter device so as to detect the temperature of the blind end part of the temperature measuring part.

In application, the invention also has the following further optional technical scheme.

Alternatively, the first fin portions fixed to at least one surface of the energy accumulating portion are arranged along the axial direction of the energy accumulating portion, and the first fin portions are uniformly arranged around the axis of the energy accumulating portion.

Optionally, a second annular fin part which is perpendicular to the axis of the energy storage part and surrounds the energy storage part along the circumferential direction is further arranged on the side surface of the energy storage part, the second annular fin part is in thermal contact with the side surface of the energy storage part, and the second annular fin part is fixed with the side surface of the energy storage part; the second fin part sequentially penetrates through the first fin part, and the second fin part is in thermal contact with and fixed to the first fin part; furthermore, one of the second fins is located at the blind end of the thermometric part.

Optionally, the first fin portion is arranged perpendicular to a corresponding surface of the energy accumulating portion; alternatively, the first fin portion is arranged obliquely to the corresponding surface of the energy accumulating portion.

Optionally, the first fin portion is a planar sheet; alternatively, the first fin portion may be a curved sheet.

Optionally, the free edge side of the first fin part is rotated relative to the fixed edge side by a preset angular displacement to form a twisted sheet-like structure, and the area of the orthographic projection of the first fin part on the surface fixed with the first fin part is increased.

Optionally, slits are respectively arranged on the first fin part and the second fin part; further, the slits on the two adjacent first fin portions are arranged in a staggered manner, and the slits on the two adjacent second fin portions are arranged in a staggered manner.

Optionally, the temperature measuring device further includes a casing, a display screen, and a key assembly adapted to control the on/off and parameter setting of the temperature measuring device, the display screen is assembled with the casing and located in the front shell of the casing, the key assembly and the control circuit are disposed in the casing, and the keys of the key assembly protrude from the surface of the casing through corresponding through holes on the casing.

Optionally, the material of the filter device is any one of silver, copper, aluminum and silicon carbide.

The other technical scheme of the invention is as follows:

the utility model provides a temperature measuring device that has filter equipment based on thing networking which design point lies in: the system comprises a mobile terminal, the Internet of things, a temperature sensor, a control circuit suitable for temperature signal acquisition and processing and a filtering device suitable for filtering ultralow frequency disturbance signals; the filter device at least comprises a columnar energy storage part and a first fin part in a sheet shape, wherein the first fin part is arranged on at least one surface of the energy storage part, the first fin part is in thermal contact with the energy storage part, and the first fin part and the energy storage part are fixed; the energy storage part is internally provided with a blind hole-shaped temperature measuring part extending along the axis direction of the energy storage part, and the temperature measuring part is suitable for the temperature sensor to measure the temperature of the blind end part of the energy storage part; the temperature sensor is assembled with the temperature measuring part of the filter device so as to detect the temperature of the blind end part of the temperature measuring part; the control circuit and the mobile terminal are respectively provided with a network unit, the network unit of the mobile terminal is in communication connection with the network unit of the control circuit through the Internet of things, and the mobile terminal is suitable for acquiring the temperature signal detected by the temperature measuring device and setting parameters of the temperature signal.

A natural convection flow field is formed in fluid with uneven temperature distribution, disturbance interference signals are generated by the flow of the fluid on temperature detection, particularly ultralow frequency disturbance signals with the period of up to several minutes, when the temperature of the fluid is detected by a temperature measuring device in the prior art, the temperature of the fluid is detected, the ultralow frequency disturbance signals are also detected, the ultralow frequency disturbance signals are difficult to filter by an electronic filter, the temperature measuring device cannot accurately detect the temperature of the fluid, the disturbance influence of the disturbance signals in the heating, refrigerating and other heat treatment processes causes the temperature of the fluid to fluctuate greatly, the fluid is difficult to be stabilized at a preset value of the temperature, the consumed time is long, and the energy consumption is high.

Compared with the prior art, the invention has the following beneficial effects:

the temperature measuring device is provided with the mechanical filtering device, the filtering device can filter the ultralow frequency disturbance signal generated by the flow of the fluid on the temperature detection, and accurately detect the temperature of the fluid, so that the interference influence of the disturbance signal is avoided in the heat treatment processes of heating, refrigeration and the like, the fluctuation range of the temperature of the fluid is small, the fluid is more easily stabilized at a preset temperature value, the consumed time is short, and the energy consumption is saved.

The temperature measuring device based on the Internet of things comprises the mobile terminal, the detecting device is provided with the mechanical filtering device, on one hand, ultralow frequency disturbing signals generated by the flow of fluid on the temperature detection can be filtered, the temperature of the fluid can be accurately detected, no disturbing signal influence exists in the heat treatment process, the temperature of the fluid can be more easily stabilized at a set value, on the other hand, the temperature of the detected fluid can be obtained from the temperature measuring device through the Internet of things based on the mobile terminal, the parameter setting is carried out on the temperature measuring device, the operation of the Internet of things is realized, and the working efficiency is improved.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without inventive labor.

Fig. 1 is a schematic diagram of a temperature measuring device with a filter device in an embodiment.

Fig. 2 is a perspective view of a filter device.

Fig. 3 is a schematic semi-sectional view of the filter apparatus of fig. 2.

Fig. 4 is a perspective view of another filter device.

Fig. 5 is a schematic top view of the filter device of fig. 4.

Fig. 6 is a graph of temperature signals directly detected by the temperature sensor.

Fig. 7 is a graph of the temperature signal detected by the temperature sensor equipped with the filter device.

Fig. 8 is a schematic diagram of a temperature measuring device with a filtering device based on the internet of things in the embodiment.

The temperature measuring device comprises a filter device 10, an energy storage part 11, a first fin part 12, a second fin part 12', a temperature measuring part 13, a slit 15, a temperature sensor 20, a control circuit 30, a display screen 40, a key assembly 50 and a shell 60.

Detailed Description

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application. The directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present invention are only used to explain the relative positional relationship between the components, the movement, etc. in a specific posture (as shown in the drawings), and if the specific posture is changed, the directional indication is changed accordingly.

As an embodiment of the present invention, a temperature measuring device with a filter device, as shown in fig. 1, includes a mechanical filter device 10, a temperature sensor 20, and a temperature measuring device body; the temperature measuring device body comprises a control circuit 30, a display screen 40, a key assembly 50 and a shell 60. The control circuit 30 is disposed on the circuit board, and the control circuit 30 is adapted to operate the temperature sensor 20 to collect a temperature signal of the fluid and process the collected temperature signal, such as performing conventional processes of amplifying, electronically filtering, a/D converting, and shaping the temperature signal, so as to obtain a digital temperature signal. The filter device 10 is composed of at least a columnar energy accumulating portion 11 and a first fin portion 12 in a sheet shape, as shown in fig. 2 and 3. The energy storage part 11 is in a cylindrical shape and is vertically arranged, a plurality of first fin parts 12 are arranged on at least one surface of the energy storage part 11, the plurality of first fin parts 12 are in thermal contact with the surface of the energy storage part 11, and the first fin parts 12 and the energy storage part 11 are fixed. The energy storage part 11 is provided with a temperature measuring part 13 suitable for temperature measurement, as shown in fig. 1 and fig. 3, the temperature measuring part 13 is a round blind hole-shaped structure extending along the axis direction of the energy storage part 11 and suitable for a temperature sensor to measure the temperature of the blind end part of the energy storage part, the blind end part is positioned in the energy storage part 11 and is slightly affected by disturbance interference, the filtering effect is favorably improved, and the temperature of the part is used as the temperature of the fluid. The filter device 10 is used for filtering an ultra-low frequency disturbing signal existing in a fluid, wherein the period of the disturbing signal is as high as more than 1 minute, for example, the period can reach several minutes, and the electronic filter is extremely difficult to filter. The housing 60 may alternatively be a hollow shell-like structure in the shape of a hexahedral box, and as shown in fig. 1, the shell surface closest to the reader is referred to as the front shell portion of the housing. Control circuit 30 and key assembly 50 are mounted inside housing 60. The display screen 40 is mounted on the front shell of the casing 60, located above the front shell, and electrically connected with the control circuit 30; the keys of the key assembly 50 protrude from a predetermined through hole of the front case portion located below the casing 60 and protrude therefrom to be pressed by a user, as shown in fig. 1. The packaging structure of the temperature sensor 20 is adapted to the blind hole of the temperature measuring part 13, and can be packaged into a cylindrical structure, and the sensing part of the temperature sensor 20 for detecting temperature is packaged at the top end part of the cylindrical structure. The temperature sensor 20 is assembled with the temperature measuring unit 13 of the filter device 10, and as shown in fig. 1, the temperature sensor 20 is located in a blind hole as the temperature measuring unit 13, and the temperature sensing unit of the temperature sensor 20 is attached to a bottom surface portion of a blind end portion constituting the temperature measuring unit 13 (i.e., a top surface portion of the temperature measuring unit 13 shown in fig. 2) to detect the temperature of the blind end portion, that is, measure the temperature inside the energy storage unit 11 as the temperature of the fluid to be measured, which is advantageous in improving the filtering effect. The temperature sensor 20 is fixed with the filter device 10, and the temperature sensor 20 is electrically connected with the control circuit 30 through a lead. The material of the filtering device is copper, and any one of silver, aluminum and silicon carbide or a combination of two or more of the materials can be selected.

As shown in fig. 2 and 3, the mechanical filter device 10 includes an energy storage portion 11 and a first fin portion 12, the first fin portion 12 and the energy storage portion 11 are fixed, and a temperature measuring portion 13 suitable for temperature measurement is disposed on the energy storage portion 11. The energy storage part 11 is cylindrical and vertically arranged, and the axis of the energy storage part 11 is vertical to the horizontal plane. The energy accumulating portion 11 is provided with a first fin portion 12 on at least one surface thereof, for example, the energy accumulating portion 11 is provided with a plurality of first fin portions 12 on an upper surface thereof, the plurality of first fin portions 12 are arranged along an axial direction of the energy accumulating portion 11, the first fin portions 12 are perpendicular to the upper surface of the energy accumulating portion 11, the first fin portions 12 are in thermal contact with the upper surface of the energy accumulating portion 11, and the first fin portions 12 and the energy accumulating portion 11 are fixed. The plurality of first fin portions 12 are arranged radially and uniformly around the axis of the energy accumulating portion 11, and the first fin portions 12 are arranged in the radial direction of the energy accumulating portion 11. The radially uniform arrangement is understood to be an equiangular pitch distribution, i.e., the angular distances between any two adjacent first fin portions 12 are equal with respect to the axis of the energy accumulating portion 11. Further, a plurality of first fin portions 12 are disposed on a side surface of the energy accumulating portion 11, the plurality of first fin portions 12 are arranged along an axial direction of the energy accumulating portion 11, the plurality of first fin portions 12 are uniformly arranged in a radial shape around the axis of the energy accumulating portion 11, the first fin portions 12 are arranged along a radial direction of the energy accumulating portion 11, the plurality of first fin portions 12 are in thermal contact with the side surface of the energy accumulating portion 11, the first fin portions 12 and the energy accumulating portion 11 are fixed, and the first fin portions 12 are perpendicular to the side surface of the energy accumulating portion 11. The above-described manner of fixing the energy accumulating portion 11 and the first fin portion 12 may alternatively be integrally formed, or may be fixed by welding. The energy storage part 11 is provided with a temperature measuring part 13 suitable for temperature measurement, as shown in fig. 3, the temperature measuring part 13 is a blind hole-shaped structure extending along the axial direction of the energy storage part 11, the upper end of the temperature measuring part is a blind end, and the temperature measuring part is suitable for the temperature sensor 20 to measure the temperature of the blind end serving as the temperature measuring part 13. The blind end part is positioned in the energy storage part 11, the influence of fluid disturbance is minimal, the filtering effect is good, and the temperature of the blind end part is taken as the temperature of the fluid. The first fin portion 12 is a planar sheet. The energy storage part 11 having a cylindrical shape may be replaced by an energy storage part 11 having a polygonal prism shape, such as a triangular prism or a quadrangular prism. The first fin portion 12 may be a curved sheet, such as an arc, and the first fin portion 12 may be perpendicular to the surface of the energy accumulating portion 11, i.e., a tangent plane of a curved surface element fixed to the energy accumulating portion 11 may be perpendicular to the surface of the energy accumulating portion 11.

It should be noted that the fins 12 on the upper surface of the energy storage portion 11 may also be arranged in parallel and uniformly distributed, which may be understood as an equidistant distribution, i.e. the distance between any two adjacent fins 12 is equal. The surfaces of the fin portions 12 and the energy accumulating portion 11 at the joint are perpendicular to each other, and the fin portions 12 are perpendicular to the upper surface of the energy accumulating portion 11. The fin portion 12 may be inclined to the upper surface of the energy accumulating portion 11, and an included angle between the fin portion 12 and the upper surface of the energy accumulating portion 11, for example, an included angle of 10 to 20 degrees, may be understood as an included angle between a plane direction of the fin portion 12 and a plane direction of the surface of the energy accumulating portion 11, that is, an included angle between two normal lines (this is a common expression of an included angle between two normal lines). The inclined arrangement of the fin portion 12 is beneficial to optimizing the thermal process effect of the fluid and the filtering device, and the filtering effect and the miniaturization of the filtering device are improved.

The fluid is subjected to heat treatment, such as heating, refrigeration and the like, the temperature distribution of the fluid is uneven, the fluid with uneven temperature distribution generates natural convection under the action of gravity, a large number of horizontal flow regions, turbulent flow regions and turbulent flow regions are formed in the fluid, and the position distribution of a fluid temperature field is particularly like hilly landforms and is not smooth. The flow of the fluid generates disturbance signals for detecting the temperature, particularly ultralow frequency disturbance signals with the period reaching the order of several minutes, and the electronic filter is difficult to filter, so that the temperature signals detected by the temperature sensor contain a large number of disturbance signals, the temperature of the fluid cannot be accurately measured, and the disturbance signals interfere and influence in the heat treatment process, so that the temperature of the fluid fluctuates greatly, the fluid is difficult to be stabilized at a set value of the temperature, the temperature is stabilized at the set value for a long time, and the energy consumption is increased.

The filtering principle of the filtering device 10 is as follows: the energy storage part 11 is used for storing heat energy, absorbing temperature disturbance signals generated by fluid flow through complex heat transfer processes of heat absorption, heat storage, heat release and the like, particularly ultra-low frequency disturbance signals with the period up to the order of several minutes, and enabling the temperature sensor to accurately detect the temperature of the fluid. For example, the fluid slowly flows to the filter device 10 of the detection device, and along with the flow of the fluid, when the temperature peak fluid smooths the filter device, the fluid with higher temperature is in thermal contact with the first fin portion 12 of the filter device and exchanges heat, the first fin portion 12 absorbs heat, the temperature of the end portion of the first fin portion 12 rises, and transfers heat to the energy storage portion 11, the energy storage portion 11 absorbs heat, and the local temperature at the connection portion with the first fin portion 12 rises, because the energy storage portion 11 has heat storage capacity, the heat brought by the temperature peak fluid is absorbed and stored, a temperature field is re-established, the temperature of the outer boundary of the filter device 10 is higher than the temperature inside the energy storage portion 11, the temperature of the blind end portion serving as the temperature measurement portion 13 does not rise obviously, and the temperature at the position is still in a stable state; when the filtering wave device is stroked by fluid with a temperature wave trough, the fluid with a lower temperature is in thermal contact with the first fin part 12 of the filtering device and exchanges heat, the first fin part 12 releases heat, the temperature of the end part of the first fin part 12 is reduced, the energy storage part 11 transmits heat to the fluid through the first fin part 12, the local temperature of the connection part with the first fin part 12 is reduced, as the energy storage part 11 stores heat energy, the heat is gradually released along with the arrival of the fluid with the temperature wave trough, a temperature field is reestablished, the temperature of the outer boundary of the filtering device 10 is lower than the temperature in the energy storage part 11, the temperature of the blind end part serving as the temperature measuring part 13 is not obviously reduced, and the temperature of the position is still in a stable state; by such circulation, the filtering device repeatedly reconstructs the temperature field through a thermal process, but the temperature of the blind end part serving as the temperature measuring part 13 has no obvious change, and the filtering device filters disturbance temperature signals generated when the fluid with uneven temperature distribution flows through complex heat transfer processes such as heat absorption, heat storage, heat release and the like, so that the temperature of the fluid is accurately detected. The filtering device has a certain volume, the volume of the energy storage part 11 and the first fin part 12 is related to the specific heat capacity of the material, the fluctuation amplitude of the fluid disturbance temperature signal and the frequency of the disturbance signal, generally speaking, the smaller the specific heat capacity, the larger the fluctuation amplitude and the lower the frequency of the disturbance signal, the larger the volume of the energy storage part 11 is, and conversely, the smaller the volume of the energy storage part 11 is. The total volume of the filtering device, the structure of the energy storage part and the structure of the first fin part can be measured in an experimental mode, and on the premise of meeting the filtering requirement, the required material is minimum, the volume is minimum, the filtering device is not a technical scheme which needs protection, and detailed description is omitted.

In order to more intuitively display the filtering effect, the inventor designs a simulation temperature field to illustrate the filtering performance of the filtering device. A plurality of parallel heating rods are uniformly arranged on the experiment platform along the horizontal plane direction, the heating power of each heating rod is the same, and the heating rods heat air fluid to form a wavy temperature field. When the temperature distribution of the air fluid is stable, the temperature sensor slowly moves above the heating rod along the horizontal direction vertical to the heating rod at a uniform speed so as to simulate the air fluid to flow to a detection point of the temperature sensor and generate a disturbance signal for the detection point. The temperature signal directly detected by the temperature sensor is shown in fig. 5, which includes the temperature signal of the air fluid and the disturbance signal of the temperature. The fluctuation amplitude of the temperature disturbance signal is as high as 2.9 ℃, and the fluctuation amplitude is very large; the period of the temperature disturbance signal is as high as 2.0 minutes, belongs to the ultralow frequency disturbance signal and is difficult to filter by an electronic filter device. The filtering device and the temperature sensor are assembled, the temperature sensor moves uniformly in the same direction at the same height from the heating rod and at the same speed, and the temperature signal curve detected by the temperature sensor through the filtering device is as shown in fig. 6, so that the fluctuation amplitude of the temperature signal is extremely small and less than 0.3 ℃, namely the filtering device has a strong filtering effect on ultralow frequency disturbance signals, and the temperature sensor can detect the temperature of the fluid more accurately. In addition, the filter device can be optimized and designed in an experimental mode, so that the filter device is matched with the ultralow frequency disturbing signal to be filtered, if the ultralow frequency disturbing signal is matched with the fluctuation amplitude and the fluctuation period of the ultralow frequency disturbing signal, the temperature signal detected by the filter device almost does not comprise the disturbing signal of the temperature, the temperature of the fluid can be detected more accurately, and the optimized design of the filter device is not a protection point of the invention and is not detailed.

As an alternative, the difference from the filtering apparatus 10 is that a second fin portion 12 'is disposed on a side surface of the energy accumulating portion 11, the second fin portion 12' is perpendicular to an axis of the energy accumulating portion 11, and the second fin portion 12 'forms a ring-shaped sheet structure around the axis of the energy accumulating portion 11 along a circumference of the side surface thereof, that is, the second fin portion 12' is ring-shaped, such as circular ring-shaped. The second fin unit 12 ' is inserted through the first fin units 12 fixed to the energy storage unit 11 side surface in this order, the first fin units 12 are in thermal contact with the second fin unit 12 ', and the second fin unit 12 ' is fixed to the first fin unit 12. In addition, one of the second fin portions 12 'is located at the blind end of the temperature measuring portion 13, and it is understood that the second fin portion 12' is coplanar with the blind end of the temperature measuring portion 13, i.e., has the same height as the blind end. The second fin portion 12 ' is in contact with the side surface of the energy accumulating portion 11, and as shown in fig. 2 and 3, the second fin portion 12 ' is in sufficient thermal contact with the side surface of the energy accumulating portion 11, and the second fin portion 12 ' is fixed to the side surface of the energy accumulating portion 11. The second fin portion 12' is disposed perpendicular to the side surface of the energy accumulating portion 11. The improvement can improve the filtering effect of the temperature measuring device provided with the filtering device, and is beneficial to the miniaturization of the filtering device.

As an alternative, the difference between the above-mentioned filtering device 10 and the above-mentioned energy storage part 11 is that a plurality of first fin portions 12 are provided on the lower surface of the energy storage part 11, as shown in fig. 2 and 3, the plurality of first fin portions 12 are uniformly arranged in a radial shape around the axis of the energy storage part 11, the first fin portions 12 are attached to the lower surface of the energy storage part 11, the fin portions 12 are in sufficient thermal contact with the lower surface of the energy storage part 11, the fin portions 12 are fixed to the energy storage part 11, and the fin portions 12 are perpendicular to the lower surface of the energy storage part 11. Therefore, the energy accumulating part 11 is located in the middle of the space defined by the outer boundaries of the fin parts 12, the temperature measuring part 13 is located in the middle of the space, and the blind hole end (i.e., the temperature detecting part) as the temperature measuring part 13 is located in the center of the energy accumulating part 11. By the design, the filtering effect of the filtering device is improved, the more important assembling mode of the filtering device is more flexible, the influence of the assembling mode on the filtering effect is very small, and the filtering device is convenient to assemble and install.

As an alternative, the difference with the filtering device 10 is that the first fin portion 12 is provided with one or more elongated slits 15, as shown in fig. 4 and 5, which can be understood as the length of the slit is much greater than the width thereof, for example, the length-width ratio is greater than 10 times. Furthermore, the first fin portion 12 may be provided with a notch, which is understood to have a comparable aspect ratio, such as a ratio of 1-2; a gap between the slit and the gap may also be provided. The slits 15 in any two adjacent first fin portions 12 are offset from each other as shown in fig. 4 and 5, and it can be understood that an orthographic projection of the slit 15 in one first fin portion 12 on the other first fin portion 12 does not overlap the slit 15 at any position on the other first fin portion 12. The second fin portion 12 'is provided with a plurality of elongated slits 15, and as shown in fig. 4 and 5, the slits 15 are uniformly distributed in the second fin portion 12' and are respectively located between the two leading first fin portions 12, and the slits 15 are radially distributed with respect to the energy accumulating portion 11. The slits 15 in the first fin portion 12 and the second fin portion 12' are advantageous for improving the response of the filter device to temperature and improving the filtering effect, particularly for filtering disturbance signals at ultra-low frequencies.

As an alternative, the difference from the filtering apparatus 10 is that the free side of the first fin portion 12 is rotated by a predetermined angular displacement relative to the fixed side to form a twisted sheet structure, so as to increase the area of the orthographic projection of the first fin portion 12 on the surface fixed with the first fin portion. For example, the first fin portion 12 on the upper surface of the energy accumulating portion 11 is twisted, and it is understood that the free edge side of the top portion of the first fin portion 12 is rotated by a predetermined angular displacement, for example, an angular displacement of 5 degrees, with respect to the fixed edge side on the bottom portion thereof, to form a twisted sheet (not shown in the drawings), and the orthographic projection area of the first fin portion 12 on the upper surface of the energy accumulating portion is increased, and the orthographic projection area may be made to cover the upper surface of the energy accumulating portion 11 as needed. For example, the first fin portion 12 located on the side surface of the energy accumulating portion 11 may be twisted, and it is understood that the free edge side of the first fin portion 12 located on the outer side is rotated by a predetermined angular displacement, for example, 8 degrees, with respect to the fixed edge side located on the inner side, to form a twisted sheet (not shown in the drawings), and the orthographic projection area of the first fin portion 12 on the side surface of the energy accumulating portion 11 is increased, and the orthographic projection area may be made to cover the side surface of the energy accumulating portion 11 according to design requirements. By the arrangement, the flowing path of the fluid flowing to the energy storage part is changed, the thermal action process of the fluid, the first fin part and the energy storage part is enhanced, and the filtering effect of the filtering device is optimized.

In a specific application, the filter device 10 can be assembled and fixed with the temperature measuring device body according to requirements, and is understood to be a one-piece structure. For example, room temperature control: the temperature measuring device with the filter device is electrically connected with a controller of the air conditioner, detects the room temperature and maintains the temperature of the room temperature at a set value. In this case, the temperature measuring device with a filter device equipped with the filter device 10 is installed indoors, detects the temperature of the indoor air, and the controller of the air conditioner acquires the temperature and controls the operation of the air conditioner, such as cooling. When the room temperature is higher than the set value, the air conditioner is operated to blow out cold air, the indoor air is cooled, the temperature distribution of the air is uneven, a large number of advection, turbulence and turbulent flow areas are generated, a convection flow field is formed, the convection flow field generates temperature interference signals for temperature detection, if the temperature sensor directly detects the temperature of the air, temperature signals containing the disturbance signals are detected, and the fluctuation amplitude of the detected temperature signals is large. If the controller of the air conditioner operates the air conditioner to run and refrigerate based on the temperature signal directly detected by the temperature sensor, the detected disturbance signal is amplified due to thermal inertia delay of an air conditioning system, so that the indoor air generates a large temperature fluctuation amplitude, such as a temperature amplitude of 3-5 ℃, and the temperature of the indoor air is difficult to be stabilized at a set value, and the temperature is stabilized at the set value for a long time, such as 3-5 minutes, so that the energy consumption is increased. The temperature measuring device with the filtering device is adopted to collect the temperature of indoor air, the temperature sensor is assembled with the filtering device 10, the filtering device 10 filters air convection to generate disturbance signals, the temperature of the air is accurately detected, the controller of the air conditioner controls the air conditioner to operate on the basis of the temperature signals detected by the temperature measuring device, disturbance signal interference is avoided, the temperature fluctuation range of the air is extremely small, the temperature of the air is more easily stabilized at a set value, the consumed time is shorter, and energy consumption is favorably saved.

It should be noted that the position of the air conditioner relative to the temperature measuring point, the air supply mode, the air supply size, the indoor object, the indoor space size, and the like of the air conditioner all generate disturbance influence on the indoor temperature field, so that a large number of advection field regions, turbulence field regions, and turbulence field regions are generated in the indoor air, which causes the temperature field distribution of the indoor air to be uneven, and the position of the temperature field is very uneven, such as hilly landscape. The air flow of the above-mentioned configuration temperature field generates a temperature interference signal to the detection point at a fixed position, the period of the temperature interference signal is related to the flow rate of the air, the period is from several seconds to several minutes, the frequency is very low, the temperature interference signal is nominally an ultra-low frequency temperature interference signal, and the electronic filter is extremely difficult to filter. The temperature measuring device with the filtering device can well filter the ultralow frequency interference signal, realize accurate temperature measurement, avoid large fluctuation amplitude of room temperature caused by the over-regulation of an air conditioner system, easily stabilize the room temperature at a set value, consume shorter time and be beneficial to saving energy consumption.

In a specific application, the mechanical filter device 10 may be configured separately from the temperature measuring device body, as required, which may be understood as a split structure. For example, heating a liquid: the temperature measuring device with the filtering device is electrically connected with the controller of the heater, and the liquid is heated, so that the temperature of the liquid is maintained at a set value. In this case, the temperature measuring device body is disposed outside the liquid, the temperature sensor equipped with the filter device 10 is disposed in the liquid, and the temperature of the liquid is detected. After the liquid is heated, the temperature distribution is uneven, a convection flow field is generated, the liquid flow generates a disturbance signal for detecting the temperature, if the temperature sensor directly detects the temperature, the disturbance signal is detected, the fluctuation amplitude of the detected temperature signal is large, the controller of the heater controls the heater to heat based on the temperature signal directly detected by the temperature sensor, and the disturbance signal is amplified due to the thermal inertia delay of the system, so that the liquid generates large temperature fluctuation amplitude, such as 3-5 ℃ fluctuation amplitude, the temperature of the liquid is difficult to be stabilized at a set value, and long time is required, such as 2-4 minutes, and the energy consumption is increased; the filter device 10 is assembled on the temperature sensor of the temperature measuring device, the filter device 10 filters ultralow frequency disturbance signals generated by liquid flow, the temperature of the liquid is accurately detected, the heater is controlled by the controller of the heater to heat based on the temperature signals detected by the detection device, disturbance signals do not interfere, the temperature fluctuation range of the liquid is extremely small, the temperature of the liquid is conveniently stabilized at a set value, the consumed time is short, if 0.5-1.0 minute is needed, and the energy consumption is favorably saved.

It should be noted that the shape, the installation position, the structure of the container, etc. of the heater all generate disturbance influence on the liquid temperature field, so that a advection field region, a turbulence field region and a turbulence field region are generated in the liquid, and the temperature field of the liquid is not uniformly distributed and is very uneven, thereby forming a liquid flow field. The flow of the liquid generates temperature interference signals to detection points in the liquid, the period of the temperature interference signals is related to the flow rate of the liquid, the period is from several seconds to several minutes, the frequency is very low, the temperature interference signals are called ultra-low frequency disturbance signals, and an electronic filtering device is extremely difficult to filter.

As another embodiment of the present invention, a technical content different from the above-described embodiment will be mainly described in this embodiment.

A temperature measuring device with a filtering device based on the internet of things, as shown in fig. 8 and fig. 1, the temperature measuring device includes a mechanical filtering device 10, a temperature sensor 20, a control circuit 30, a display screen 40, a key assembly 50, a mobile terminal 70 and the internet of things 80. The filtering device 10 is used for filtering an ultra-low frequency disturbing signal generated in the fluid to be measured. The control circuit 30 is adapted for temperature signal acquisition, processing and manipulation data transmission. The filter device 10 is composed of at least a columnar energy accumulating portion 11 and a first fin portion 12 in a sheet shape, as shown in fig. 2 and 3. The energy storage part 11 is in a cylindrical shape and is vertically arranged, a plurality of first fin parts 12 are arranged on at least one surface of the energy storage part 11, the plurality of first fin parts 12 are in thermal contact with the surface of the energy storage part 11, and the first fin parts 12 and the energy storage part 11 are fixed. The energy storage part 11 is provided with a temperature measuring part 13 suitable for temperature measurement, as shown in fig. 1, the temperature measuring part 13 is a blind hole-shaped structure extending downwards along the axis direction of the energy storage part 11, and is suitable for a temperature sensor to measure the temperature of a blind end serving as the temperature measuring part 13, the blind end is located inside the energy storage part 11, the influence of fluid disturbance is minimal, and the filtering effect is good. The temperature sensor 20 may be a cylindrical structure, that is, the cylindrical structure of the temperature sensor 20 is matched with the temperature measuring part 13, and the sensing part of the temperature sensor 20 for detecting temperature is sealed at the top end of the cylindrical structure, as shown in fig. 1. The temperature sensor 20 is assembled with the temperature measuring part 13 of the filter device 10, the temperature sensor 20 is located in the temperature measuring part 13, and the temperature sensing part of the temperature sensor 20 is attached to the blind end part (i.e., the top surface part of the temperature measuring part 13 shown in fig. 2) constituting the temperature measuring part 13 to detect the temperature of the blind end part, i.e., the internal temperature of the energy storage part 11. The blind end of the temperature measuring part 13 is positioned in the energy storage part 11, is slightly influenced by fluid disturbance, has good filtering effect and is favorable for accurately measuring the temperature of the fluid. The control circuit 30 is internally provided with a network unit, is suitable for establishing communication connection between the control circuit and the internet of things 80, and is used for controlling signal and data transmission; the mobile terminal 70 is provided with a built-in network unit, which is suitable for establishing communication connection between the mobile terminal and the internet of things 80, and is used for controlling signal and data transmission. The network unit of the mobile terminal 70 establishes communication connection with the network unit of the control circuit 30 through the internet of things 80, and is suitable for mutual signal transmission between the mobile terminal 70 and the control circuit 30, the mobile terminal 70 obtains a temperature signal detected by the measuring device and sets parameters of the measuring device, and the measuring device can be controlled to start and stop through the mobile terminal 70, so that internet of things control is realized, convenience is provided for users, and the working efficiency is improved.

Under the action of gravity, the fluid with uneven temperature distribution generates natural convection, and a large number of horizontal flow regions, turbulent flow regions and turbulent flow regions are formed in the fluid, so that the position distribution of a fluid temperature field is particularly like a hilly landform, and is uneven in height. The flow of the fluid generates disturbance signals on the temperature detection point, particularly ultralow frequency disturbance signals with the period reaching the order of several minutes, and the electronic filter is difficult to filter and cannot accurately measure the temperature of the fluid. The detected ultra-low frequency disturbance signal is responded by heating devices such as a heater, an air conditioner and the like, and the disturbance signal is amplified into temperature fluctuation with large fluctuation amplitude, so that the fluid temperature is difficult to be stabilized at a set value, long time is required for stabilizing the temperature at the set value, and the energy consumption is increased.

Compared with the prior art, the invention has the following remarkable technical progress.

The foregoing shows and describes the general principles, essential features, and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the foregoing description only for the purpose of illustrating the principles of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the invention as defined by the appended claims, specification, and equivalents thereof.

Claims

1. A temperature measuring device with a filter device is characterized in that: the temperature measuring device comprises a temperature sensor, a mechanical filtering device and a control circuit, wherein the mechanical filtering device is suitable for filtering ultralow frequency disturbance signals, and the control circuit is suitable for acquiring and processing temperature signals; the filtering device at least comprises a columnar energy storage part and a sheet-shaped first fin part, wherein a plurality of first fin parts are arranged on at least one surface of the energy storage part, the first fin parts are in thermal contact with the energy storage part, and the first fin parts and the energy storage part are fixed; the energy storage part is internally provided with a blind hole-shaped temperature measuring part extending along the axial direction of the energy storage part and is suitable for the temperature sensor to detect the temperature of the blind end part of the temperature measuring part; the temperature sensor is assembled with the temperature measuring part of the filter device so as to detect the temperature of the blind end part of the temperature measuring part.

2. The temperature measuring device with a filter device according to claim 1, wherein: the first fin parts fixed on at least one surface of the energy storage part are arranged along the axial direction of the energy storage part and are uniformly arranged around the axis of the energy storage part.

3. The temperature measuring device with a filter device according to claim 1, wherein:

the side surface of the energy storage part is also provided with a second annular fin part which is perpendicular to the axis of the energy storage part and surrounds the energy storage part along the circumferential direction, the second fin part is in thermal contact with the side surface of the energy storage part, and the second fin part is fixed with the side surface of the energy storage part; the second fin portion sequentially penetrates the first fin portion, and the second fin portion is in thermal contact with and fixed to the first fin portion.

4. The temperature measuring device with a filter device according to claim 1, wherein: the first fin part is arranged perpendicular to the corresponding surface of the energy storage part; alternatively, the first fin portion is arranged obliquely to the corresponding surface of the energy accumulating portion.

5. The temperature measuring device with a filter device according to claim 4, wherein: the first fin part is in a planar sheet shape; alternatively, the first fin portion may be a curved sheet.

6. The temperature measuring device with a filter device according to claim 1, wherein: the free edge side of the first fin part rotates relative to the fixed edge side by a preset angular displacement to form a twisted sheet-shaped structure, and the area of the orthographic projection of the first fin part on the fixed surface of the first fin part is increased.

7. The temperature measuring device with a filter device according to any one of claims 1 to 6, wherein: slits are respectively arranged on the first fin part and the second fin part; the slits on the two adjacent first fin parts are arranged in a staggered mode, and the slits on the two adjacent second fin parts are arranged in a staggered mode.

8. The temperature measuring device with a filter device according to any one of claims 1 to 6, wherein: the temperature measuring device further comprises a shell, a display screen and a key assembly suitable for controlling the startup and shutdown of the temperature measuring device and setting parameters, the display screen and the shell are assembled and located on the front shell of the shell, the key assembly and the control circuit are arranged in the shell, and keys of the key assembly protrude out of the surface of the shell through corresponding through holes in the shell.

9. The temperature measuring device with a filter device according to claim 8, wherein: the material of the filtering device is any one of silver, copper, aluminum and silicon carbide.