CN114018467A - Voltage stabilizer - Google Patents

Voltage stabilizer Download PDF

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Publication number
CN114018467A
CN114018467A CN202111211419.8A CN202111211419A CN114018467A CN 114018467 A CN114018467 A CN 114018467A CN 202111211419 A CN202111211419 A CN 202111211419A CN 114018467 A CN114018467 A CN 114018467A
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CN
China
Prior art keywords
static pressure
pressure
air inlet
box
pressure box
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN202111211419.8A
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Chinese (zh)
Inventor
李宏波
韦韬
陈鑫
吴尚晏
姚腾飞
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Gree Electric Appliances Inc of Zhuhai
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Gree Electric Appliances Inc of Zhuhai
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Gree Electric Appliances Inc of Zhuhai filed Critical Gree Electric Appliances Inc of Zhuhai
Priority to CN202111211419.8A priority Critical patent/CN114018467A/en
Publication of CN114018467A publication Critical patent/CN114018467A/en
Pending legal-status Critical Current

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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
    • G01L19/00—Details of, or accessories for, apparatus for measuring steady or quasi-steady pressure of a fluent medium insofar as such details or accessories are not special to particular types of pressure gauges
    • G01L19/0007—Fluidic connecting means
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
    • G01L19/00—Details of, or accessories for, apparatus for measuring steady or quasi-steady pressure of a fluent medium insofar as such details or accessories are not special to particular types of pressure gauges
    • G01L19/06—Means for preventing overload or deleterious influence of the measured medium on the measuring device or vice versa
    • G01L19/0627—Protection against aggressive medium in general
    • G01L19/0636—Protection against aggressive medium in general using particle filters
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
    • G01L19/00—Details of, or accessories for, apparatus for measuring steady or quasi-steady pressure of a fluent medium insofar as such details or accessories are not special to particular types of pressure gauges
    • G01L19/06—Means for preventing overload or deleterious influence of the measured medium on the measuring device or vice versa
    • G01L19/0627—Protection against aggressive medium in general
    • G01L19/0654—Protection against aggressive medium in general against moisture or humidity
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
    • G01L19/00—Details of, or accessories for, apparatus for measuring steady or quasi-steady pressure of a fluent medium insofar as such details or accessories are not special to particular types of pressure gauges
    • G01L19/06—Means for preventing overload or deleterious influence of the measured medium on the measuring device or vice versa
    • G01L19/0681—Protection against excessive heat

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Measuring Fluid Pressure (AREA)

Abstract

The invention relates to a pressure stabilizing device, which separates a pressure taking port of a differential pressure sensor from the external environment through a static pressure box and a static pressure pipe. Furthermore, the static pressure pipe extending from the pressure taking port of the differential pressure sensor to the static pressure box increases an airflow path, so that airflow entering the pressure taking port is more stable, vortex is avoided, the stability of the airflow is improved, and the problem of great numerical change of the differential pressure sensor caused by unstable airflow is solved. The pressure taking port of the differential pressure sensor is isolated from the external environment through the static pressure box and the static pressure pipe, so that the wind speed between the outside and the pressure sensor is stable, the wind speed attenuation is obvious, and the measurement precision is improved.

Description

Voltage stabilizer
Technical Field
The invention relates to the technical field of measuring devices, in particular to a voltage stabilizing device.
Background
The pressure maintaining system in the P3 level biological environmental control laboratory is a core system for ensuring the normal operation of the whole laboratory, and the system aims at: the requirements of pressure values and pressure gradients of all functional partitions required by a b2 type of a three-level animal biological safety laboratory are met, the pressure values and the pressure gradients under different working conditions and technological processes are guaranteed to be stable, the fluctuation of the pressure values is less than or equal to +/-10 pa, and the pressure gradients are greater than 10 pa. The existing pressure systems employ multiple differential pressure sensors to ensure completion of the above objectives.
The differential pressure sensor is composed of a conversion element and a sensitive element. Wherein the conversion element is the part of the sensor which converts the measured quantity sensed or responded by the sensitive element into an electric signal suitable for transmission or measurement; a sensitive element refers to a portion of the sensor that is capable of directly sensing or responding to a measurement being measured. The field observation shows that differential pressure sensor output signal is unstable, gets the pressure port at first and is in the external world, and its pressure source itself is just an unstable pressure, and external environment disturbance is great, and wind blows when getting pressure port department and can arouse the disturbance, and under the adverse circumstances condition simultaneously, dust dregs deposit in the air is in the pipeline, and in the rainwater injection pipe, sensitive element can not directly experience pressure among the leading to the fact differential pressure sensor to pressure detection shows unstable problem.
Disclosure of Invention
In view of the above, the present invention provides a pressure stabilizer, so as to solve the problem in the prior art that the pressure measuring port of the pressure difference sensor in the bio-environmental control laboratory is in the external environment for a long time, and is greatly interfered by the external environment, and pressure fluctuation is frequent, which results in frequent pressure difference display fluctuation.
According to a first aspect of an embodiment of the present invention, there is provided a voltage stabilizing device including:
the bottom of the static pressure box is provided with an air inlet port;
the static pressure pipe extends into the static pressure box from the pressure taking port of the differential pressure sensor, the air inlet of the static pressure pipe is arranged in the static pressure box in a non-contact mode, and the air outlet of the static pressure pipe is covered on the pressure taking port of the differential pressure sensor.
Preferably, the air inlet port of the static pressure box is covered with a filter screen.
Preferably, the static pressure pipe is a vertical elbow, the part of the static pressure pipe outside the static pressure box is a horizontal section, and the part extending into the static pressure box is a vertical section;
the air inlet is arranged on the vertical section, and the air outlet is arranged on the horizontal section.
Preferably, the air inlet is towards the bottom of the static pressure box; alternatively, the first and second electrodes may be,
the air inlet faces the top of the static pressure box.
Preferably, if the air inlet is towards the bottom of the static pressure box, the air inlet is separated from the bottom of the static pressure box by a first preset distance; alternatively, the first and second electrodes may be,
and if the air inlet faces the top of the static pressure box, the air inlet and the top of the static pressure box are separated by a second preset distance.
Preferably, the horizontal section is provided with an external thread near the air outlet, and the external thread is matched with an internal thread at a pressure tapping port of the differential pressure sensor.
Preferably, a flow equalizing plate is arranged in the horizontal section.
Preferably, the flow equalizing plate is circular, and a plurality of circular ventilation holes are uniformly distributed on the flow equalizing plate; and/or the presence of a gas in the gas,
the flow equalizing plate is vertically arranged in the horizontal section.
Preferably, the plenum box is rectangular.
Preferably, the voltage stabilizing apparatus further includes:
and the fixed bracket is used for supporting the static pressure box.
The technical scheme provided by the embodiment of the invention can have the following beneficial effects:
pressure taking port of the pressure difference sensor is isolated from the external environment through the static pressure box and the static pressure pipe, and the air inlet port is arranged at the bottom of the static pressure box, so that rainwater can be prevented from being injected and dust dregs can be prevented from being deposited, corrosive or overheated medium is prevented from being contacted, and interference of the external environment on pressure measurement of the pressure difference sensor is reduced.
Furthermore, the static pressure pipe extending from the pressure taking port of the differential pressure sensor to the static pressure box increases an airflow path, so that airflow entering the pressure taking port is more stable, vortex is avoided, the stability of the airflow is improved, and the problem of great numerical change of the differential pressure sensor caused by unstable airflow is solved. The pressure taking port of the differential pressure sensor is isolated from the external environment through the static pressure box and the static pressure pipe, so that the wind speed between the outside and the pressure sensor is stable, the wind speed attenuation is obvious, and the measurement precision is improved.
It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the invention, as claimed.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and together with the description, serve to explain the principles of the invention.
Fig. 1 is a schematic structural diagram illustrating a voltage stabilization device according to an exemplary embodiment;
FIG. 2 is a schematic diagram of a filter screen according to an exemplary embodiment;
FIG. 3 is a schematic diagram of the structure of a flow equalization plate shown in accordance with an exemplary embodiment.
Detailed Description
Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, like numbers in different drawings represent the same or similar elements unless otherwise indicated. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present invention. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the invention, as detailed in the appended claims.
Fig. 1 is a schematic structural diagram illustrating a voltage stabilization device according to an exemplary embodiment, which, as shown in fig. 1, includes:
the static pressure box 6 is provided with an air inlet port 1 at the bottom;
the static pressure pipe 7 extends into the static pressure box 6 from the pressure taking port 3 of the differential pressure sensor 4, the air inlet of the static pressure pipe is arranged in the static pressure box 6 in a non-contact mode, and the air outlet of the static pressure pipe is covered on the pressure taking port 3 of the differential pressure sensor 4.
It should be noted that, according to the technical solution provided by this embodiment, applicable scenarios include but are not limited to: pressure differential measurements for stationary bio-environmental laboratories (e.g., bio-environmental laboratories installed indoors), and pressure differential measurements for mobile bio-environmental laboratories (e.g., bio-environmental laboratories installed on vehicles).
The biological environmental control laboratory can be a P3 grade biological environmental control laboratory.
In particular practice, the plenum 6 may be of various shapes, including but not limited to: round, raindrop, square, diamond, rectangular, etc. The rectangular static pressure box shown in fig. 1 is only an example, and does not represent that the technical solution provided by the present embodiment can only be realized by the rectangular static pressure box, and the rectangular static pressure box is within the protection scope of the present embodiment as long as the function of the static pressure box in the present embodiment can be realized.
It should be noted that, in the actual use process, the pressure stabilizing device provided by this embodiment may be provided with a single fixing bracket for supporting the plenum box, so that the bottom of the plenum box can be suspended into the air; a fixed bracket can be welded at the bottom of the static pressure box and used for supporting the static pressure box so that the bottom of the static pressure box can be suspended to enter air; in addition, according to the requirement, a fixed bracket can be welded on the wall surface for bearing the static pressure box (similar to the installation of an outdoor unit of an air conditioning room), or a foldable and telescopic fixed bracket can be welded on a vehicle for bearing the static pressure box.
It can be understood that the technical scheme that this embodiment provided, through static pressure case and static pressure pipe with differential pressure sensor's pressure taking mouth and external environment keep apart, because the air inlet port sets up in the bottom of static pressure case, so can prevent that the rainwater from pouring into and dust dregs deposit, prevent corrosivity or overheated medium contact, reduced external environment to differential pressure sensor pressure measurement's interference.
Furthermore, the static pressure pipe extending from the pressure taking port of the differential pressure sensor to the static pressure box increases an airflow path, so that airflow entering the pressure taking port is more stable, vortex is avoided, the stability of the airflow is improved, and the problem of great numerical change of the differential pressure sensor caused by unstable airflow is solved. The pressure taking port of the differential pressure sensor is isolated from the external environment through the static pressure box and the static pressure pipe, so that the wind speed between the outside and the pressure sensor is stable, the wind speed attenuation is obvious, and the measurement precision is improved.
In a specific practice, the inlet port of the static pressure box 6 is covered with a filter screen 2, see fig. 2.
It can be understood that the arrangement of the filter screen can further filter dust dregs in the air, improve the cleanliness of the air entering the static pressure box and reduce the interference of the external environment.
In particular practice, the static tube can be of various shapes, for example, arcuate, linear, creased (e.g., 30 °, 45 °, 60 °, etc.).
Preferably, the static pressure pipe 7 is a vertical elbow, the part of the static pressure pipe 7 outside the static pressure box 6 is a horizontal section, and the part extending into the static pressure box 6 is a vertical section;
the air inlet is arranged on the vertical section, and the air outlet is arranged on the horizontal section.
It can be understood that the static pressure pipe selects the vertical elbow, and because the vertical elbow has the right angle turn, the air vortex can effectively be got rid of at the right angle turn to the air that gets into the static pressure pipe for the air current that gets into the pressure mouth is more stable, improves the stability of air current, and the great problem of differential pressure sensor numerical value change that further reduces to lead to because of the air current is unstable takes place.
In a specific practice, if the static pressure pipe 7 is a vertical bend, the air inlet is directed towards the bottom of the static pressure box 6; alternatively, the air inlet is directed towards the top of the plenum box 6 (as shown in fig. 1).
It can be understood that, because the air inlet port is arranged at the bottom of the static pressure box, the air entering the static pressure box flows towards the bottom of the static pressure box, and therefore, the air inlet is towards the bottom of the static pressure box; alternatively, the air inlet can be directed toward the top of the plenum box to allow air to enter the plenum.
However, if the air inlet is toward the top of the static pressure box 6, the air flow path can be further increased, the air flow vortex entering the static pressure pipe 7 can be further reduced, and the stability of the air flow can be improved.
In a specific practice, if the air inlet is directed toward the bottom of the static pressure box 6, the air inlet is spaced from the bottom of the static pressure box 6 by a first preset distance; alternatively, the first and second electrodes may be,
if the air inlet faces the top of the static pressure box 6, the air inlet is spaced from the top of the static pressure box 6 by a second preset distance.
It can be understood that the air inlet of the static pressure tube must be spaced a first predetermined distance from the bottom of the static pressure box when the air inlet is directed toward the bottom of the static pressure box to ensure that the air inlet of the static pressure tube is not blocked by the static pressure box and air can enter; when the air inlet of the static pressure pipe faces the top of the static pressure box, the air inlet of the static pressure pipe must be separated from the top of the static pressure box by a second preset distance so as to ensure that the air inlet of the static pressure pipe is not blocked by the static pressure box and can enter air.
In a specific practice, the first preset distance and/or the second preset distance are set according to user needs, or set according to historical experience values, or set according to experimental data.
As described above, the technical solution provided by this embodiment is applicable to scenarios including but not limited to: pressure differential measurements for stationary bio-environmental laboratories (e.g., bio-environmental laboratories installed indoors), and pressure differential measurements for mobile bio-environmental laboratories (e.g., bio-environmental laboratories installed on vehicles).
When the technical scheme that this embodiment provided, when being applicable to the pressure differential measurement of portable biological environmental control laboratory, because biological environmental control laboratory need remove, so need consider the detachability of this kind of pressure stabilizer that this embodiment provided to in transportation, also need avoid causing the damage of pressure taking mouthful when the transportation simultaneously.
Preferably, the horizontal section is provided with an external thread (see the wave section on 7 in fig. 1) near the air outlet, and the external thread is matched with the internal thread at the pressure taking port 3 of the differential pressure sensor 4.
When the pressure stabilizing device provided by the embodiment needs to be used, the air outlet of the static pressure pipe is screwed into the pressure taking port, and the other end of the static pressure pipe is arranged in the static pressure box and supports the static pressure box through the fixing bracket, so that the static pressure pipe can be fixed; when the pressure stabilizing device provided by the embodiment needs to be disassembled, the air outlet of the static pressure pipe is screwed out of the pressure taking port, and the static pressure box and the static pressure pipe can be stored together by removing the fixing support at the other end of the static pressure pipe in the static pressure box.
It can be understood that this kind of voltage regulator device that this embodiment provided, simple structure, dismantlement convenience, the transportation of being convenient for remove, can be suitable for the differential pressure measurement under the multiple scene, user experience is good, the satisfaction is high.
In particular practice, a flow equalization plate 5 may also be provided within the horizontal section.
Preferably, referring to fig. 3, the flow equalizing plate 5 is circular, and a plurality of circular ventilation holes are uniformly distributed on the flow equalizing plate; and/or the flow equalizing plate 5 is vertically arranged in the horizontal section.
It can be understood that the arrangement of the flow equalizing plate enables the air flow in the static pressure pipe to be more stable, further avoids the generation of vortex, further improves the stability and cleanliness of the air flow, and further prevents the problem of large numerical change of the differential pressure sensor caused by uneven air flow speed.
It can be understood that the flow equalizing plate is vertically arranged in the horizontal section, so that the flow equalizing plate has the largest contact area with air, and the air flow stabilizing effect is improved.
Under the normal condition, differential pressure sensor directly contacts with external environment through getting pressure port and carries out the measurement of pressure differential, calculates the difference through external pressure and indoor pressure, gets the measurement that air velocity and the flow direction of pressure port department can influence pressure differential. The wind pressure is the pressure of wind on a plane vertical to the direction of the airflow, and the wind pressure relation w is obtained according to the Bernoulli equationp＝0.5r0v2Wherein w ispRepresenting wind pressure, r0Represents the air density, v2Representing the square of the wind speed, since the air density varies in the same regionNot so much, the wind speed is a key factor influencing the wind pressure. If the pressure taking port is directly contacted with the outdoor environment, when wind blows outdoors, the numerical value of the differential pressure sensor is changed greatly and does not meet the requirements of relevant specifications. Therefore, if the wind speed can be reduced at the position of the pressure intake, the pressure at the pressure intake can be stabilized.
The technical scheme that this embodiment provided sets up the air inlet port through the bottom of static pressure case, covers the filter screen on the air inlet port, so can prevent that rainwater from pouring into and dust dregs deposit, prevent corrosivity or overheated medium contact to avoid differential pressure sensor to get the jam of pressure port, improve the cleanliness factor of air current. In consideration of the design of the pipe section form, the vertical elbow is matched with the static pressure box, so that the attenuation of the air flow speed is facilitated. Furthermore, the flow equalizing plate is arranged in the vertical bent pipe, so that stable conveying of air flow in the pipe is realized, the generation of vortex in the pipe is avoided, the stability of the air flow is improved, and the purpose of stabilizing the air pressure at the pressure taking port is further realized.
It is understood that the same or similar parts in the above embodiments may be mutually referred to, and the same or similar parts in other embodiments may be referred to for the content which is not described in detail in some embodiments.
It should be noted that the terms "first," "second," and the like in the description of the present invention are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. Further, in the description of the present invention, the meaning of "a plurality" means at least two unless otherwise specified.
Any process or method descriptions in flow charts or otherwise described herein may be understood as representing modules, segments, or portions of code which include one or more executable instructions for implementing specific logical functions or steps of the process, and alternate implementations are included within the scope of the preferred embodiment of the present invention in which functions may be executed out of order from that shown or discussed, including substantially concurrently or in reverse order, depending on the functionality involved, as would be understood by those reasonably skilled in the art of the present invention.
It should be understood that portions of the present invention may be implemented in hardware, software, firmware, or a combination thereof. In the above embodiments, the various steps or methods may be implemented in software or firmware stored in memory and executed by a suitable instruction execution system. For example, if implemented in hardware, as in another embodiment, any one or combination of the following techniques, which are known in the art, may be used: a discrete logic circuit having a logic gate circuit for implementing a logic function on a data signal, an application specific integrated circuit having an appropriate combinational logic gate circuit, a Programmable Gate Array (PGA), a Field Programmable Gate Array (FPGA), or the like.
It will be understood by those skilled in the art that all or part of the steps carried by the method for implementing the above embodiments may be implemented by hardware related to instructions of a program, which may be stored in a computer readable storage medium, and when the program is executed, the program includes one or a combination of the steps of the method embodiments.
In addition, functional units in the embodiments of the present invention may be integrated into one processing module, or each unit may exist alone physically, or two or more units are integrated into one module. The integrated module can be realized in a hardware mode, and can also be realized in a software functional module mode. The integrated module, if implemented in the form of a software functional module and sold or used as a stand-alone product, may also be stored in a computer readable storage medium.
The storage medium mentioned above may be a read-only memory, a magnetic or optical disk, etc.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art within the scope of the present invention.

Claims (10)

1. A voltage stabilization device, comprising:
the bottom of the static pressure box is provided with an air inlet port;
the static pressure pipe extends into the static pressure box from the pressure taking port of the differential pressure sensor, the air inlet of the static pressure pipe is arranged in the static pressure box in a non-contact mode, and the air outlet of the static pressure pipe is covered on the pressure taking port of the differential pressure sensor.
2. The voltage stabilization device according to claim 1,
and a filter screen is covered on the air inlet port of the static pressure box.
3. The voltage stabilization device according to claim 1,
the static pressure pipe is a vertical bent pipe, the part of the static pressure pipe outside the static pressure box is a horizontal section, and the part extending into the static pressure box is a vertical section;
the air inlet is arranged on the vertical section, and the air outlet is arranged on the horizontal section.
4. The voltage stabilization device according to claim 3,
the air inlet faces the bottom of the static pressure box; alternatively, the first and second electrodes may be,
the air inlet faces the top of the static pressure box.
5. The voltage stabilization device according to claim 4,
if the air inlet faces the bottom of the static pressure box, the air inlet and the bottom of the static pressure box are separated by a first preset distance; alternatively, the first and second electrodes may be,
and if the air inlet faces the top of the static pressure box, the air inlet and the top of the static pressure box are separated by a second preset distance.
6. The voltage stabilization device according to claim 4,
and the horizontal section is provided with an external thread close to the air outlet, and the external thread is matched with the internal thread at the pressure taking port of the differential pressure sensor.
7. The voltage stabilization device according to claim 4,
and a flow equalizing plate is arranged in the horizontal section.
8. The voltage stabilization device according to claim 7,
the flow equalizing plate is circular, and a plurality of circular ventilation holes are uniformly distributed in the flow equalizing plate; and/or the presence of a gas in the gas,
the flow equalizing plate is vertically arranged in the horizontal section.
9. The voltage stabilization device according to any one of claims 1 to 8,
the static pressure box is rectangular.
10. The voltage stabilizer according to claim 9, characterized by further comprising:
and the fixed bracket is used for supporting the static pressure box.
CN202111211419.8A 2021-10-18 2021-10-18 Voltage stabilizer Pending CN114018467A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202111211419.8A CN114018467A (en) 2021-10-18 2021-10-18 Voltage stabilizer

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202111211419.8A CN114018467A (en) 2021-10-18 2021-10-18 Voltage stabilizer

Publications (1)

Publication Number Publication Date
CN114018467A true CN114018467A (en) 2022-02-08

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CN202111211419.8A Pending CN114018467A (en) 2021-10-18 2021-10-18 Voltage stabilizer

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