CN111237568A - Reduce equalizer tube structure of interior steam content of temperature control workspace - Google Patents

Abstract

The invention provides a pressure equalizing pipe structure for reducing the water vapor content in a temperature control working space, comprising: a confluence end; a suction end and an exhaust end connected with the confluence end; Air valve assembly and exhaust valve assembly; when the external atmospheric pressure is greater than the pressure in the temperature-controlled workspace, the exhaust valve assembly is closed; and when the first pressure difference between the external atmospheric pressure and the pressure in the temperature-controlled workspace is greater than or less than the first When the preset threshold value is set, the suction valve assembly is opened or closed respectively; when the pressure in the temperature control work space is greater than the external atmospheric pressure, the suction valve assembly is closed; and when the second pressure difference between the pressure in the temperature control work space and the atmospheric pressure is greater than or less than the second preset threshold, the exhaust valve assembly is opened or closed, respectively. The embodiment of the present invention can reduce the water vapor of the outside air entering the working space, and reduce the air dew point temperature, thereby reducing the amount of frost and condensation on the surface of the test sample during the heating process.

Description

A pressure equalizing tube structure for reducing the water vapor content in the temperature control working space

technical field

The invention relates to the technical field of uniform collimation, in particular to a pressure equalizing tube structure for reducing the water vapor content in a temperature-controlled working space.

Background technique

The descriptions in this section merely provide background information related to the present disclosure and do not constitute prior art.

Pressure changes in the workspace are further caused by temperature changes in the temperature-controlled workspace (eg, the interior space of an environmental chamber). In order to balance the pressure in the working space, it is usually necessary to set up a pressure balance pipe, that is, a pressure equalizing pipe.

The pressure balance pipe is communicated with the outside atmosphere. Usually, in the temperature balance stage, there is a certain positive or negative pressure at the pressure equalizing nozzle in the working space, which will cause the fresh air outside the box to enter the working space, and the water vapor outside the box will continue to enter the box. Under low temperature conditions, water vapor will continuously enter the working space and store on the surface of the evaporator in the form of frost. In the heating stage, the frost stored on the surface of the evaporator turns into water vapor and enters the working space, thereby causing the relative humidity in the box to increase and the dew point temperature to rise. In the heating stage, due to the hysteresis of the surface temperature of the test sample, the surface temperature of the sample will be lower than the dew point temperature in the working space, which will cause more frost and condensation on the surface of the test sample, which will affect the accuracy of the test. It should be noted that the above description of the technical background is only for the convenience of clearly and completely describing the technical solutions of the present invention and facilitating the understanding of those skilled in the art. It should not be assumed that the above-mentioned technical solutions are well known to those skilled in the art simply because these solutions are described in the background section of the present invention.

SUMMARY OF THE INVENTION

Based on the aforementioned defects of the prior art, the embodiment of the present invention provides a pressure equalizing pipe structure for reducing the water vapor content in the temperature control working space, aiming at reducing the water vapor of the outside air entering the working space, reducing the air dew point temperature, thereby reducing the heating process The amount of frost and condensation on the surface of the test sample.

In order to achieve the above objects, the present invention provides the following technical solutions.

A pressure equalizing tube structure for reducing water vapor content in a temperature-controlled workspace, comprising:

The confluence end has a confluence channel for communicating with the temperature control working space;

a suction end connected with the confluence end, the suction end has a suction channel, the suction channel has a suction port communicated with the outside atmosphere, and a suction inlet communicated with the confluence channel;

a suction valve assembly, arranged in the suction passage and between the suction port and the suction inlet;

an exhaust end connected to the confluence end, the exhaust end has an exhaust passage, and the exhaust passage has an exhaust port communicated with the outside atmosphere and an exhaust outlet communicated with the confluence channel;

an exhaust valve assembly disposed in the exhaust passage and between the exhaust port and the exhaust outlet;

When the external atmospheric pressure is greater than the pressure in the temperature-controlled work space, the exhaust valve assembly is in a closed state; and when the first pressure difference between the external atmospheric pressure and the pressure in the temperature-controlled work space is greater than a first preset When a threshold value is set, the suction valve assembly is in an open state; when the first differential pressure value is less than a first preset threshold value, the suction valve assembly is in a closed state;

When the pressure in the temperature-controlled working space is greater than the outside atmospheric pressure, the suction valve assembly is in a closed state; and when the second pressure difference between the pressure in the temperature-controlled working space and the outside atmospheric pressure is greater than a second preset threshold When the exhaust valve assembly is in an open state; when the second differential pressure value is smaller than a second preset threshold value, the exhaust valve assembly is in a closed state.

Preferably, the suction end includes: a suction pipe connected to the confluence end and in communication with the confluence end passage, and a suction cap detachably connected to the outer end of the suction pipe; the suction pipe The opening of the outer end of the pipe forms the suction inlet, and the suction inlet is provided on the bottom wall of the suction cap.

Preferably, the inner wall of the suction cap is necked inward at a position close to the suction port to form a suction necking channel, and an end of the suction necking channel forms a suction stop step, the The suction stop step tops and fixes the outer end of the suction pipe;

The suction valve assembly includes:

The annular support seat and the annular magnetic element are pressed between the suction stop step and the outer end of the suction pipe, and the annular support seat is located on the annular magnetic element and the suction pipe between the outer ends;

A first disc blocking piece and a first disc magnetic element arranged in the suction necking channel and between the suction stop step limit and the annular magnetic element, the first The disc blocking piece is located between the first disc magnetic element and the suction stop step; the first disc blocking piece and the first disc magnetic element can be in the suction necking channel The center moves in the axial direction and is limited by the suction stop step;

Wherein, the polarity of the annular magnetic element facing the first disk magnetic element is the same as the polarity of the first disk magnetic element facing the annular magnetic element, and the first preset threshold is the magnetic repulsion force between the annular magnetic element and the first disk magnetic element.

Preferably, when the suction valve assembly is in a closed state, the first disc blocking piece is fixed on the suction stop step and blocks the suction port; when the suction valve When the assembly is in an open state, the first disc blocking piece is spaced from the suction stop step, and the suction port is opened.

Preferably, the diameters of the first disc blocking piece and the first disc magnetic element are larger than the inner diameter of the suction port but smaller than the inner diameter of the suction necking channel, so that the first disc seals the A suction gap is formed between the sheet, the first disk magnetic element and the inner wall of the suction necking channel; when the suction valve assembly is in an open state, the suction port is connected to the suction gap through the suction gap. The suction cap communicates.

Preferably, a suction ring cavity communicating with the suction cap is provided in the suction necking passage, and a suction grille is arranged on the inner wall of the suction necking passage, and the suction grille communicates with the suction cap. the suction ring cavity and the suction port; when the suction valve assembly is in an open state, the suction port communicates with the suction cap through the suction grille and the suction ring cavity.

Preferably, the exhaust end includes: an exhaust pipe connected to the confluence end and in communication with the confluence end channel, and an exhaust cap detachably connected to the outer end of the exhaust pipe; the exhaust pipe The outer end of the pipe is opened to form the exhaust outlet, and the exhaust outlet is an exhaust grille arranged on the side wall of the exhaust cap.

Preferably, the inner wall of the exhaust cap is necked inward to form an exhaust stopper step, the exhaust stopper step is spaced apart from the outer end of the exhaust pipe, and the end of the exhaust stopper step is The portion does not exceed the inner end of the exhaust grill;

The exhaust valve assembly includes:

a disk support seat and a second disk magnetic element fixed on the exhaust stopper step, the disk support seat is located between the second disk magnetic element and the exhaust stopper step;

a second disk blocking piece and a third disk magnetic element located in the exhaust cap and between the second disk magnetic element and the outer end of the exhaust pipe, the third disk The magnetic element is located between the second disc blocking piece and the outer end of the exhaust pipe; the second disc blocking piece and the third disc magnetic element can move axially in the exhaust cap and limited by the outer end of the exhaust pipe;

Wherein, the polarity of the second disk magnetic element facing the third disk magnetic element is the same as the polarity of the third disk magnetic element facing the second disk magnetic element, and the third disk magnetic element has the same polarity. The two preset thresholds are the magnetic repulsion force between the second disk magnetic element and the third disk magnetic element.

Preferably, when the exhaust valve assembly is in a closed state, the second disc blocking sheet is fixed on the outer end of the exhaust pipe and blocks the exhaust outlet; when the exhaust valve assembly is in a closed state In the open state, the second disc blocking sheet is spaced from the outer end of the exhaust pipe, and the exhaust outlet is opened.

Preferably, the diameters of the second disc blocking sheet and the third disc magnetic element are larger than the inner diameter of the exhaust outlet and smaller than the inner diameter of the exhaust cap, so that the second disc blocking sheet, the third An exhaust gap is formed between the three-disk magnetic element and the inner wall of the exhaust cap; when the exhaust valve assembly is in an open state, the exhaust outlet passes through the exhaust gap and the exhaust cap Connected.

The pressure equalizing pipe structure for reducing the water vapor content in the temperature control working space according to the embodiment of the present invention utilizes the relationship between the repulsion force between the magnetic poles and the differential pressure force to control the opening and closing states of the valve assemblies in the suction end and the exhaust end. When the pressure in the temperature working space is greater than the exhaust pressure threshold or less than the suction pressure threshold, the pressure equalizing pipe will exhaust or inhale, which can reduce the outside air entering the temperature working space, so as to balance the pressure and reduce the water vapor in the working space. content, and further reduce the frosting and condensation phenomenon of the specimen in the heating stage. In addition, the pressure equalizing pipe for reducing the water vapor content in the temperature control working space according to the embodiment of the present invention has a simple structure and is convenient for installation and maintenance.

With reference to the following description and drawings, specific embodiments of the invention are disclosed in detail, indicating the manner in which the principles of the invention may be employed. It should be understood that embodiments of the present invention are not thereby limited in scope.

Features described and/or illustrated for one embodiment may be used in the same or similar manner in one or more other embodiments, in combination with, or in place of features of other embodiments .

It should be emphasized that the term "comprising/comprising" when used herein refers to the presence of a feature, integer, step or component, but does not exclude the presence or addition of one or more other features, integers, steps or components.

Description of drawings

The drawings described herein are for explanatory purposes only and are not intended to limit the scope of the present disclosure in any way. In addition, the shapes and proportions of the components in the figures are only schematic and are used to help the understanding of the present invention, and do not specifically limit the shapes and proportions of the components of the present invention. Under the teachings of the present invention, those skilled in the art can select various possible shapes and proportions according to specific conditions to implement the present invention. In the attached image:

1 is a three-dimensional schematic diagram of a pressure-equalizing pipe structure for reducing water vapor content in a temperature-controlled workspace according to an embodiment of the present invention;

Fig. 2 is the exploded structure schematic diagram of the pressure equalizing pipe structure for reducing the water vapor content in the temperature control working space according to the embodiment of the present invention;

3 is a schematic structural diagram when both the suction valve assembly and the exhaust valve assembly in the pressure equalizing pipe structure for reducing the water vapor content in the temperature control working space according to the embodiment of the present invention are in a closed state;

4 is a schematic structural diagram of the suction valve assembly in the pressure equalizing pipe structure for reducing the water vapor content in the temperature control working space according to an embodiment of the present invention when it is in an open state;

5 is a schematic structural diagram of the exhaust valve assembly in the pressure equalizing pipe structure for reducing the water vapor content in the temperature control working space according to an embodiment of the present invention when the exhaust valve assembly is in an open state.

Detailed ways

In order to make those skilled in the art better understand the technical solutions of the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described The embodiments are only some of the embodiments of the present invention, but not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative work shall fall within the protection scope of the present invention.

It should be noted that when an element is referred to as being "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for the purpose of illustration only and do not represent the only embodiment.

Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terms used herein in the description of the present invention are for the purpose of describing specific embodiments only, and are not intended to limit the present invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

In this specification, the direction away from the ground of the environmental test box with the top-suction air duct structure according to the embodiment of the present invention is defined as "up" under normal use. On the contrary, the direction pointing to the ground is defined as "up". "Down". The user-facing directions are defined as "front and back", and the user's left and right hand directions are defined as "left and right". Also, in the description of the present invention, unless otherwise specified, "plurality" means two or more.

As shown in FIG. 1 to FIG. 5 , an embodiment of the present invention provides a pressure equalizing pipe structure for reducing the water vapor content in a temperature-controlled working space, which may include:

The confluence end 1 has a confluence channel 101 for communicating with the temperature control working space;

The suction end 2 connected to the confluence end 1, the suction end 2 has a suction channel 201, and the suction channel 201 has a suction port 202 communicated with the outside atmosphere, and a suction inlet 203 communicated with the confluence channel 101;

The suction valve assembly 3 is arranged in the suction passage 201 and is located between the suction port 202 and the suction inlet 203;

The exhaust end 4 connected to the confluence end 1, the exhaust end 4 has an exhaust passage 401, the exhaust passage 401 has an exhaust port 402 communicated with the outside atmosphere, and an exhaust outlet 403 communicated with the confluence passage 101;

The exhaust valve assembly 5 is arranged in the exhaust passage 401 and is located between the exhaust port 402 and the exhaust outlet 403;

When the external atmospheric pressure is greater than the pressure in the temperature-controlled working space, the exhaust valve assembly 5 is in a closed state; and when the first pressure difference between the external atmospheric pressure and the pressure in the temperature-controlled working space is greater than the first preset threshold, the suction valve The assembly 3 is in an open state; when the first differential pressure value is less than the first preset threshold, the suction valve assembly 3 is in a closed state;

When the pressure in the temperature-controlled workspace is greater than the outside atmospheric pressure, the suction valve assembly 3 is in a closed state; and when the second pressure difference between the pressure in the temperature-controlled workspace and the outside atmospheric pressure is greater than the second preset threshold, the exhaust valve The assembly 5 is in an open state; when the second differential pressure value is smaller than the second preset threshold, the exhaust valve assembly 5 is in a closed state.

As shown in FIG. 1 , the structure of the pressure equalizing tube in the embodiment of the present invention is similar to the three-way structure. One end (the confluence end 1) is used to communicate with the temperature control working space, and the other two ends (the suction end 2 and the exhaust end 4) are used for suction and exhaust, respectively. Wherein, the confluence end 1 can be composed of a single pipe body, which can be connected with the equipment that constitutes or defines the temperature control work space, such as an environmental test box, by means of screw connection, plug connection, clip connection, etc., and realizes the confluence channel 101 and the temperature Controls the connectivity of the workspace.

The suction end 2 and the exhaust end 4 may be formed by combining corresponding pipe bodies and cap bodies respectively. Specifically, as shown in FIGS. 1 and 2 , the suction end 2 may include a suction pipe 204 connected to the confluence end 1 and communicated with the confluence channel 101 , and a suction cap detachably connected to the outer end of the suction pipe 204 205. The suction cap 205 can be in the shape of a groove shell with one end open, and can be detachably connected to the suction pipe 204 through threads. The suction channel 201 is formed by butting the inner space of the suction pipe 204 and the suction cap 205 . In addition, the outer end of the suction pipe 204 is opened to form the suction inlet 203 , and the suction inlet 202 is provided on the bottom wall of the suction cap 205 . Wherein, both the suction port 202 and the suction inlet 203 may be circular openings.

Likewise, the exhaust end 4 may include an exhaust pipe 404 connected with the confluence end 1 and communicated with the confluence passage 101 , and an exhaust cap 405 detachably connected with the outer end of the exhaust pipe 404 . The exhaust cap 405 can also be in the shape of a groove shell with one end open, which can be detachably connected to the exhaust pipe 404 through threads. The exhaust pipe 404 and the inner space of the exhaust cap 405 are butted to form the exhaust passage 401 . In addition, the outer end of the exhaust pipe 404 is opened to form an exhaust outlet 403 , and the exhaust port 402 is an exhaust grille provided on the side wall of the exhaust cap 405 . Wherein, the exhaust outlets 403 can also be circular openings, and the exhaust grille can be a plurality of elongated strip-shaped openings, and the plurality of elongated strip-shaped openings are evenly arranged on the side wall of the exhaust cap 405 in the circumferential direction .

The pressure-equalizing tube structure of the embodiment of the present invention can use the principle of homopolar repulsion of magnetic elements to close or open the pressure-equalizing tube tee. Specifically, as shown in FIG. 2 , the inner wall of the suction cap 205 is necked inward at a position close to the suction port 202 to form a suction necking channel 206 , and the end of the suction necking channel 206 forms a suction stopper Step, the suction stop step tops the outer end of the suction pipe 204 .

The suction valve assembly 3 may include: a ring support seat 301 , a ring magnetic element 302 , a first disk blocking piece 303 and a first disk magnetic element 304 . The annular support seat 301 and the annular magnetic element 302 are pressed between the suction stop step and the outer end of the suction pipe 204, and the annular support 301 is located outside the annular magnetic element 302 and the suction pipe 204. between the ends. The first disc blocking piece 303 and the first disc magnetic element 304 are arranged in the suction necking channel 206 and between the suction stop step limit and the annular magnetic element 302, the first disc blocking piece 303 is located between the first disc magnetic element 304 and the suction stop step. Also, the first disc blocking piece 303 and the first disc magnetic element 304 can move in the axial direction in the suction necking channel 206 and are limited by the suction stop step.

That is to say, the annular support seat 301 and the annular magnetic element 302 are fixed, while the first disc blocking piece 303 and the first disc magnetic element 304 can move in the suction channel 201 . In addition, the annular support seat 301 , the annular magnetic element 302 , the first disk magnetic element 304 and the first disk blocking piece 303 are sequentially arranged in the suction channel 201 from the inside to the outside.

The polarity of the annular magnetic element 302 facing the first disk magnetic element 304 is the same as the polarity of the first disk magnetic element 304 facing the annular magnetic element 302 , and the first preset threshold is the annular magnetic element 302 Magnetic repulsion with the first disc magnetic element 304 .

Therefore, when the suction valve assembly 3 is in the closed state, the first disc blocking piece 303 can be pushed to the outside under the action of the magnetic repulsion force between the annular magnetic element 302 and the first disc magnetic element 304, And finally the top is fixed on the suction stop step, so as to block the suction port 202 . When the suction valve assembly 3 is in the open state, the first disc blocking piece 303 is spaced from the suction stop step, and the suction port 202 is opened at this time.

Specifically, the diameters of the first disc blocking piece 303 and the first disc magnetic element 304 are larger than the inner diameter of the suction port 202 but smaller than the inner diameter of the suction necking channel 206 . In this way, a suction gap is formed between the first disc blocking piece 303 , the first disc magnetic element 304 and the inner wall of the suction necking channel 206 . In this way, when the suction valve assembly 3 is in an open state, the suction port 202 can communicate with the suction cap 205 through the suction gap.

Further, the suction necking channel 206 may be provided with a suction ring cavity 207 communicating with the suction cap 205 , and the inner wall of the suction necking channel 206 is provided with a suction ring connecting the suction ring cavity 207 and the suction port 202 . Grille 208. When the suction valve assembly 3 is in an open state, the suction port 202 can communicate with the suction cap 205 through the suction grille 208 and the suction ring cavity 207 . In this way, the suction area can be increased and the suction efficiency can be improved.

Continuing to refer to FIG. 2 , the inner wall of the exhaust cap 405 is necked inward to form an exhaust stopper step, the exhaust stopper step is spaced apart from the outer end of the exhaust pipe 404 , and the end of the exhaust stopper step is not beyond the inner end of the exhaust grille.

Likewise, the exhaust valve assembly 5 may include: a disc supporting seat 501 , a second disc magnetic element 502 , a second disc blocking piece 503 and a third disc magnetic element 504 . The disk support seat 501 and the second disk magnetic element 502 are fixed on the exhaust stop step, and the disk support seat 501 is located between the second disk magnetic element 502 and the exhaust stop step. The second disc blocking piece 503 and the third disc magnetic element 504 are provided in the exhaust cap 405 between the second disc magnetic element 502 and the outer end of the exhaust pipe 404, and the third disc magnetic element 504 is located in the exhaust cap 405. Between the second disc blocking piece 503 and the outer end of the exhaust pipe 404 . Also, the second disc blocking piece 503 and the third disc magnetic element 504 can move in the axial direction in the exhaust cap 405 and are limited by the outer end of the exhaust pipe 404 .

That is to say, the disk support base 501 and the second disk magnetic element 502 are fixed, while the second disk blocking piece 503 and the third disk magnetic element 504 can move in the exhaust channel 401 . In addition, the second disc blocking piece 503 , the third disc magnetic element 504 , the second disc magnetic element 502 and the disc support seat 501 are sequentially arranged in the exhaust passage 401 from the inside to the outside.

The polarity of the second disk magnetic element 502 facing the third disk magnetic element 504 is the same as the polarity of the third disk magnetic element 504 facing the second disk magnetic element 502, and the second preset threshold is the first Magnetic repulsion force between the second disk magnetic element 502 and the third disk magnetic element 504 .

Therefore, when the exhaust valve assembly 5 is in the closed state, the second disc blocking piece 503 can be pushed inward under the action of the magnetic repulsion force between the second disc magnetic element 502 and the third disc magnetic element 504 It moves and is finally fixed on the outer end of the exhaust pipe 404 , thereby blocking the exhaust outlet 403 . When the exhaust valve assembly 5 is in the open state, the second disc blocking piece 503 is spaced from the outer end of the exhaust pipe 404, thereby opening the exhaust outlet 403.

Specifically, the diameters of the second disc blocking piece 503 and the third disc magnetic element 504 are larger than the inner diameter of the exhaust outlet 403 but smaller than the inner diameter of the exhaust cap 405 . In this way, an exhaust gap is formed between the second disc blocking piece 503 , the third disc magnetic element 504 and the inner wall of the exhaust cap 405 . In this way, when the exhaust valve assembly 5 is in the open state, the exhaust outlet 403 communicates with the exhaust cap 405 through the exhaust gap.

As shown in Figure 3, in a specific implementation scenario, when the pressure in the temperature-controlled workspace is balanced with the outside atmospheric pressure (including the pressure in the temperature-controlled workspace being equal to the outside atmospheric pressure, and the pressure in the temperature-controlled workspace being equal to the outside atmospheric pressure) The pressure difference of atmospheric pressure is small), the first disc blocking sheet 303 is fixed on the suction stop step under the action of the magnetic repulsion between the ring magnetic element 302 and the first disc magnetic element 304 to block the suction The air port 202; the second disc blocking piece 503 is fixed on the outer end of the exhaust pipe 404 under the action of the magnetic repulsion force between the second disc magnetic element 502 and the third disc magnetic element 504 to block the exhaust gas Exit 403. At this time, both the intake valve assembly 3 and the exhaust valve assembly 5 are in a closed state.

As shown in Figure 4, in another specific implementation scenario, when the pressure in the temperature control workspace is lower than the outside atmospheric pressure, and the pressure difference between the outside atmospheric pressure and the pressure in the temperature workspace (the first pressure difference) When it is greater than the opening threshold value of the intake valve assembly, the first differential pressure force overcomes the magnetic repulsion force between the annular magnetic element 302 and the first disc magnetic element 304, so that the first disc blocking sheet 303 and the first disc The disk magnetic element 304 is pushed inward, and the suction port 202 is unblocked and opened. In this way, the outside air can enter the temperature working space through the air inlet 202, so as to achieve the purpose of balancing the pressure. When the first differential pressure value is smaller than the magnetic repulsion force between the ring magnetic element 302 and the first disk magnetic element 304, the first disk blocking piece 303 and the first disk magnetic element 304 are in the ring magnetic element Under the action of the magnetic repulsion force between the magnetic element 302 and the first disk magnetic element 304 , it is pushed outward and is fixed against the suction stop step, and the suction port 202 is blocked.

As shown in Figure 5, in another specific implementation scenario, when the external atmospheric pressure is lower than the pressure in the temperature working space, and the pressure difference (the second pressure difference) between the pressure in the temperature working space and the outside atmospheric pressure is greater than the exhaust pressure When the opening threshold of the air valve assembly 5 is reached, the second differential pressure force overcomes the magnetic repulsion force between the second disk magnetic element 502 and the third disk magnetic element 504, so that the second disk blocking plate 503 and the third disk magnetic element 504 are closed. The three-disk magnetic element 504 is pushed to the outside, and the exhaust outlet 403 is unblocked and opened. In this way, the air in the temperature working space can enter the outside atmosphere through the exhaust outlet 403, so as to achieve the purpose of balancing the pressure. And when the second pressure difference value is smaller than the magnetic repulsion force between the second disk magnetic element 502 and the third disk magnetic element 504, the second disk blocking piece 503 and the third disk magnetic element 504 are in the second Under the action of the magnetic repulsion force between the disk magnetic element 502 and the third disk magnetic element 504, the disk magnetic element 502 and the third disk magnetic element 504 are pushed inward to push against the outer end of the exhaust pipe 404, and the exhaust outlet 403 is blocked.

The pressure equalizing pipe structure for reducing the water vapor content in the temperature control working space according to the embodiment of the present invention utilizes the relationship between the repulsive force between the magnetic poles and the differential pressure force to control the switching states of the valve assemblies in the suction end 2 and the exhaust end 4 , when the pressure in the temperature working space is greater than the exhaust pressure threshold or less than the suction pressure threshold, the pressure equalizing pipe will exhaust or inhale, which can reduce the outside air entering the temperature working space, so as to achieve the effect of balancing the pressure and reduce the working pressure. The space water vapor content further reduces the frosting and condensation of the specimen during the heating stage. In addition, the pressure equalizing pipe for reducing the water vapor content in the temperature control working space according to the embodiment of the present invention has a simple structure and is convenient for installation and maintenance.

Any numerical value recited herein includes all values of the lower value and the upper value in one unit increments from the lower value to the upper value, there being a separation of at least two units between any lower value and any higher value That's it. For example, if the number of components or process variables (eg, temperature, pressure, time, etc.) are stated to have values from 1 to 90, preferably from 21 to 80, more preferably from 30 to 70, the purpose is to illustrate that the The specification also explicitly lists values such as 15 to 85, 22 to 68, 43 to 51, 30 to 32, and the like. For values less than 1, one unit is appropriately considered to be 0.0001, 0.001, 0.01, 0.1. These are merely examples of what is intended to be express, and all possible combinations of numerical values recited between the lowest value and the highest value are considered to be expressly set forth in this specification in a similar fashion.

Unless otherwise stated, all ranges include the endpoints and all numbers between the endpoints. "About" or "approximately" used with a range applies to both endpoints of the range. Thus, "about 20 to 30" is intended to cover "about 20 to about 30," including at least the indicated endpoints.

The above are only a few embodiments of the present invention, and those skilled in the art can make various changes or modifications to the embodiments of the present invention without departing from the spirit and scope of the present invention according to the contents disclosed in the application documents.

Claims (10)

1. a pressure equalizing tube structure that reduces the water vapor content in the temperature control working space, is characterized in that, comprises: The confluence end has a confluence channel for communicating with the temperature control working space; a suction end connected with the confluence end, the suction end has a suction channel, the suction channel has a suction port communicated with the outside atmosphere, and a suction inlet communicated with the confluence channel; a suction valve assembly, arranged in the suction passage and between the suction port and the suction inlet; an exhaust end connected to the confluence end, the exhaust end has an exhaust passage, and the exhaust passage has an exhaust port communicated with the outside atmosphere and an exhaust outlet communicated with the confluence channel; an exhaust valve assembly disposed in the exhaust passage and between the exhaust port and the exhaust outlet; When the external atmospheric pressure is greater than the pressure in the temperature-controlled work space, the exhaust valve assembly is in a closed state; and when the first pressure difference between the external atmospheric pressure and the pressure in the temperature-controlled work space is greater than a first preset When a threshold value is set, the suction valve assembly is in an open state; when the first differential pressure value is less than a first preset threshold value, the suction valve assembly is in a closed state; When the pressure in the temperature-controlled working space is greater than the outside atmospheric pressure, the suction valve assembly is in a closed state; and when the second pressure difference between the pressure in the temperature-controlled working space and the outside atmospheric pressure is greater than a second preset threshold When the exhaust valve assembly is in an open state; when the second differential pressure value is smaller than a second preset threshold value, the exhaust valve assembly is in a closed state. 2 . The pressure equalizing pipe structure according to claim 1 , wherein the suction end comprises: a suction pipe connected to the confluence end and in communication with the confluence end passage, and a suction pipe connected to the confluence end. 3 . The suction cap is detachably connected to the outer end of the suction pipe; the opening of the outer end of the suction pipe forms the suction inlet, and the suction port is arranged on the bottom wall of the suction cap. 3 . The pressure equalizing pipe structure according to claim 2 , wherein the inner wall of the suction cap is necked inward at a position close to the suction port to form a suction necking channel, and the suction neck is formed. 4 . A suction stop step is formed at the end of the necking passage, and the suction stop step tops and fixes the outer end of the suction pipe; The suction valve assembly includes: The annular support seat and the annular magnetic element are pressed between the suction stop step and the outer end of the suction pipe, and the annular support seat is located on the annular magnetic element and the suction pipe between the outer ends; A first disc blocking piece and a first disc magnetic element arranged in the suction necking channel and between the suction stop step limit and the annular magnetic element, the first The disc blocking piece is located between the first disc magnetic element and the suction stop step; the first disc blocking piece and the first disc magnetic element can be in the suction necking channel The center moves in the axial direction and is limited by the suction stop step; Wherein, the polarity of the annular magnetic element facing the first disk magnetic element is the same as the polarity of the first disk magnetic element facing the annular magnetic element, and the first preset threshold is the magnetic repulsion force between the annular magnetic element and the first disk magnetic element. 4. The pipe pressing structure according to claim 3, wherein when the suction valve assembly is in a closed state, the first disc blocking piece is fixed on the suction stop step and The suction port is blocked; when the suction valve assembly is in an open state, the first disc blocking piece is spaced from the suction stop step, and the suction port is opened. 5. The pressure tube structure according to claim 3, wherein the diameter of the first disc blocking piece and the first disc magnetic element is larger than the inner diameter of the suction port but smaller than the suction neck Therefore, a suction gap is formed between the first disc blocking piece, the first disc magnetic element and the inner wall of the suction necking channel; when the suction valve assembly is in the open state When , the suction port communicates with the suction cap through the suction gap. 6. The pressure tube structure according to claim 3 or 5, wherein a suction ring cavity communicated with the suction cap is provided in the suction necking passage, and the suction necking passage is provided with a suction ring cavity. The inner wall is provided with a suction grille, and the suction grille communicates with the suction ring cavity and the suction port; when the suction valve assembly is in an open state, the suction port passes through the suction The grille and the suction ring cavity are communicated with the suction cap. 7 . The pressure equalizing pipe structure according to claim 1 , wherein the exhaust end comprises: an exhaust pipe connected to the confluence end and in communication with the confluence end passage, and an exhaust pipe connected to the exhaust pipe. 8 . The outer end of the exhaust pipe is detachably connected to the exhaust cap; the outer end opening of the exhaust pipe forms the exhaust outlet, and the exhaust outlet is an exhaust grille arranged on the side wall of the exhaust cap. 8 . The pressure equalizing pipe structure according to claim 7 , wherein the inner wall of the exhaust cap is necked inward to form an exhaust stopper step, and the exhaust stopper step and the exhaust pipe have a gap. The outer ends are spaced apart, and the end of the exhaust stop step does not exceed the inner end of the exhaust grill; The exhaust valve assembly includes: a disk support seat and a second disk magnetic element fixed on the exhaust stopper step, the disk support seat is located between the second disk magnetic element and the exhaust stopper step; a second disk blocking piece and a third disk magnetic element located in the exhaust cap and between the second disk magnetic element and the outer end of the exhaust pipe, the third disk The magnetic element is located between the second disc blocking piece and the outer end of the exhaust pipe; the second disc blocking piece and the third disc magnetic element can move axially in the exhaust cap and limited by the outer end of the exhaust pipe; Wherein, the polarity of the second disk magnetic element facing the third disk magnetic element is the same as the polarity of the third disk magnetic element facing the second disk magnetic element, and the third disk magnetic element has the same polarity. The two preset thresholds are the magnetic repulsion force between the second disk magnetic element and the third disk magnetic element. 9 . The pressure pipe structure according to claim 8 , wherein when the exhaust valve assembly is in a closed state, the second disc blocking sheet is fixed on the outer end of the exhaust pipe and seals the exhaust pipe. 10 . The exhaust outlet is blocked; when the exhaust valve assembly is in an open state, the second disc blocking sheet is spaced from the outer end of the exhaust pipe, and the exhaust outlet is opened. 10 . The pressure pipe structure according to claim 8 , wherein the diameter of the second disc blocking piece and the third disc magnetic element is larger than the inner diameter of the exhaust outlet and smaller than the diameter of the exhaust cap. 11 . the inner diameter, so that an exhaust gap is formed between the second disc blocking piece, the third disc magnetic element and the inner wall of the exhaust cap; when the exhaust valve assembly is in an open state, the exhaust valve An air outlet communicates with the exhaust cap through the exhaust gap.

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