CN116892965B - Probe structure of temperature and humidity transmitter - Google Patents
Probe structure of temperature and humidity transmitter Download PDFInfo
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- CN116892965B CN116892965B CN202311161174.1A CN202311161174A CN116892965B CN 116892965 B CN116892965 B CN 116892965B CN 202311161174 A CN202311161174 A CN 202311161174A CN 116892965 B CN116892965 B CN 116892965B
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- 239000000523 sample Substances 0.000 title claims abstract description 145
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 118
- 238000007789 sealing Methods 0.000 claims abstract description 75
- 238000011144 upstream manufacturing Methods 0.000 claims description 6
- 239000007921 spray Substances 0.000 claims description 3
- 230000007774 longterm Effects 0.000 abstract description 4
- 238000004378 air conditioning Methods 0.000 abstract description 2
- 238000010438 heat treatment Methods 0.000 abstract description 2
- 238000009423 ventilation Methods 0.000 abstract description 2
- 230000000694 effects Effects 0.000 description 10
- 238000005259 measurement Methods 0.000 description 9
- 230000004044 response Effects 0.000 description 7
- 238000000034 method Methods 0.000 description 5
- 238000005056 compaction Methods 0.000 description 4
- 230000009471 action Effects 0.000 description 3
- 238000001514 detection method Methods 0.000 description 3
- 230000005484 gravity Effects 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 230000002265 prevention Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D11/00—Component parts of measuring arrangements not specially adapted for a specific variable
- G01D11/24—Housings ; Casings for instruments
- G01D11/26—Windows; Cover glasses; Sealings therefor
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D21/00—Measuring or testing not otherwise provided for
- G01D21/02—Measuring two or more variables by means not covered by a single other subclass
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Investigating Or Analyzing Materials By The Use Of Electric Means (AREA)
Abstract
The invention relates to a temperature and humidity transmitter probe structure which is used in the fields of machine room, heating ventilation and air conditioning, building, storage and the like which need to measure the temperature and humidity. The scheme of the invention comprises the following steps: a housing; the plug is arranged in the shell and is in sealing contact with the inner wall of the shell; the through hole is formed on the upper surface; the circuit board can move between a first position and a second position relative to the plug; when the probe chip is at the first position, the tail end of the circuit board is at least partially embedded into the through hole, the through hole is closed, and the probe chip arranged on the circuit board is isolated from the cavity below the plug; and when the probe chip is in the second position, the through hole is closed by a sealing element arranged on the circuit board, and the whole probe chip is positioned below the plug and is isolated from the cavity above the plug. The circuit board can move between a first position and a second position relative to the plug; in the first position, the problem that the accuracy is affected or even damaged due to long-term exposure of the probe chip is avoided. In the second position, external water vapor is prevented from entering the cavity above the plug.
Description
Technical Field
The invention relates to a temperature and humidity transmitter probe structure, which is mainly used in the fields of machine room, heating ventilation and air conditioning, building, storage and the like, which need to measure the temperature and humidity.
Background
As shown in fig. 1 and 2, the structure of the temperature and humidity transmitter probe currently on the market includes: the probe cover 101 and the probe rod 102 are connected through threads and sealed by a waterproof gasket 103; a plug 104 is arranged in the probe, and a circuit board 106 with a probe chip 105 is arranged on the plug, so that on one hand, the plug 104 is used for sealing the inside of a product (the part above the plug), and on the other hand, the plug 104 is used for fixing the probe chip 105 and the circuit board 106; in order to prevent liquid such as rainwater from directly entering the inside of the probe cover, a filter sleeve 107 through which gas can pass but liquid cannot enter from the outside is provided inside the probe cover 101. The filter sleeve 107 is a thicker filter system, and external air enters the probe cover through the filter sleeve 107 slowly, so that the response speed of the product is slow, and the precision is not accurate enough.
If the filter sleeve 107 is not used, the probe chip 105 is basically in a state without any protection due to the air inlet 108, and substances such as rainwater, sundries and the like easily enter the probe cover 101 during storage, transportation and use and are attached to the probe chip 105, so that the measurement accuracy can be affected, and even the probe chip 105 can be damaged.
Disclosure of Invention
The invention aims to solve the problems and provides a temperature and humidity transmitter probe structure.
In order to achieve the above purpose, the present invention is realized by the following technical scheme: a temperature and humidity transmitter probe structure, comprising: a housing; the plug is arranged in the shell and is in sealing contact with the inner wall of the shell; the through hole is formed on the upper surface; the circuit board can move between a first position and a second position relative to the plug;
when the probe chip is at the first position, the tail end of the circuit board is at least partially embedded into the through hole, the through hole is closed, and the probe chip arranged on the circuit board is isolated from a cavity below the plug; and when the probe chip is at the second position, the through hole is closed by a sealing piece arranged on the circuit board, and the whole probe chip is positioned below the plug and is isolated from the cavity above the plug.
In an initial state (for example, a factory state), the circuit board is arranged at the first position, the tail end of the circuit board is at least partially embedded into the through hole, and the circuit board is matched with the rubber plug, so that the probe chip is isolated from a cavity below the plug; therefore, when the temperature and humidity transmitter is not used (for example, in the processes of storage, transportation and the like), the probe chip and the circuit board are sealed inside, so that the temperature and humidity transmitter can be effectively protected, and the problem that the accuracy of the probe chip is affected or even damaged due to long-term exposure is avoided as much as possible. In the use state, the circuit board is arranged at the second position, the through hole is closed by the sealing element, and the whole probe chip is positioned below the plug and isolated from the cavity above the plug; therefore, the probe chip is ensured to be capable of being in contact with external air for measurement, and meanwhile external water vapor is prevented from entering the cavity above the plug as much as possible.
Preferably, the probe structure further comprises: the input end of the screw rod is connected with a power source; one end of the push rod is embedded with a push rod nut in threaded connection with the output end of the screw rod, and the other end of the push rod is connected with the circuit board so as to force the circuit board to move between a first position and a second position relative to the plug.
Therefore, the screw rod nut structure is utilized to convert the rotation of a power source (such as a motor) into the linear reciprocating motion of the push rod, and then the circuit board is driven to move, so that the structure is simple.
Preferably, the housing comprises a probe rod and a probe cover in threaded connection.
Preferably, the plug includes: a body substantially annular; the sealing part is basically annular, is integrally formed on the upper end surface of the body, at least partially stretches into the probe rod and is in sealing contact with the inner wall of the probe rod;
in the second position, the sealing element is at least partially embedded in the annular sealing part, the end face of the sealing element is in sealing contact with the upper end face of the body, and the side face of the sealing element is in sealing contact with the annular sealing part.
When the circuit board is at the second position, the temperature and humidity transmitter is in a working state, better sealing is needed, and the sealing element is embedded into the annular sealing part, so that the annular sealing part can be better supported and extruded, and the sealing performance between the outer surface of the annular sealing part and the inner wall of the probe rod is better; meanwhile, the sealing contact between the end part of the sealing element and the body is utilized to realize the first-stage sealing at the position of the through hole, and the sealing contact between the side surface of the sealing element and the annular sealing part is utilized to realize the second-stage sealing at the position of the through hole, so that the possibility that water vapor enters the cavity above the plugging head through the through hole can be further reduced.
Preferably, the inner wall of the probe cover is tapped with an internal thread, and a step part is formed at the tail end of the internal thread; the end part of the probe rod presses the edge part of the body to the step part.
Therefore, the plug can be fixed on the shell by utilizing the threaded assembly of the probe cover and the probe rod, and a structural member is not required to be additionally arranged for fixing the plug; meanwhile, the compaction sealing of the end part of the probe rod and the plug body and the compaction sealing of the step part and the plug body can be utilized, so that the joint of the probe cover and the probe rod is sealed again, and the sealing effect is improved.
Preferably, the size of the end of the circuit board gradually increases along the movement direction from the first position to the second position. Therefore, when the circuit board moves from the second position to the first position, a certain force can be generated between the plug and the circuit board, and the sealing effect between the plug and the circuit board is ensured.
Preferably, the probe cover further comprises: the first water guide inclined plane is integrally formed on the side wall of the probe cover; the first water guide port is positioned at the downstream side of the first water guide inclined plane;
the second water guide inclined plane is integrally formed on the side wall of the probe cover, and the upstream side of the second water guide inclined plane is positioned below the first water guide opening; the second water guide port is positioned at the downstream side of the second water guide inclined plane; the third water guide inclined plane is integrally formed on the side wall of the probe cover, and the upstream side of the third water guide inclined plane is positioned below the second water guide opening; and the third water guide port is positioned at the downstream side of the third water guide inclined plane.
The first water guide inclined plane, the first water guide mouth, the second water guide inclined plane, the second water guide mouth, the third water guide inclined plane and the third water guide mouth are utilized to form a stepped structure, so that on one hand, large water molecules can be discharged to the outside along the stepped structure under the action of gravity, and the water can not be accumulated in the stepped structure, thereby better assisting the water prevention of products, keeping the detection part clean and tidy, and prolonging the service life; on the other hand, compared with the vertical air inlet structure adopted in the prior art, even under the weather of strong wind and heavy rain, the rainwater is difficult to enter the inside through the stepped structure to be attached to the probe chip without using the filter sleeve, but the external air can directly enter the inside through the stepped structure, so that the sensor has faster response speed and more accurate measurement result compared with the sensor which enters the sensor after passing through the filter sleeve in the prior art.
Preferably, waterproof spray is sprayed on the side wall of the probe cover, the first water guide inclined plane, the second water guide inclined plane and the third water guide inclined plane, so that macromolecular water can be discharged more quickly.
Preferably, a water outlet is formed in the side wall of the probe cover and corresponds to the downstream side of the second water guide inclined plane and/or the third water guide inclined plane, and the water drainage effect and the air inlet effect are better.
Preferably, the probe cover further comprises a plurality of water outlets positioned at the tail end of the probe cover, so that water drainage is smoother.
The invention has the beneficial effects that:
1. the circuit board can move between a first position and a second position relative to the plug; in the initial state, the circuit board is arranged at the first position, the tail end of the circuit board is at least partially embedded into the through hole, and the circuit board is matched with the rubber plug, so that the probe chip is isolated from a cavity below the plug; so, when not using temperature and humidity transmitter (for example in-process such as storage, transportation), probe chip and circuit board are sealed in inside, even do not set up the filter sleeve, also can obtain effectual protection, avoid the probe chip to receive the problem that the precision receives the influence even damages because of exposing for a long time as far as possible. In the use state, the circuit board is arranged at the second position, the through hole is closed by the sealing element, and the whole probe chip is positioned below the plug and isolated from the cavity above the plug; therefore, the probe chip is ensured to be capable of being in contact with external air for measurement, and meanwhile external water vapor is prevented from entering the cavity above the plug as much as possible.
2. Compared with the prior art, the method omits a filter sleeve, and has faster response speed and more accurate measurement result.
3. The first water guide inclined plane, the first water guide mouth, the second water guide inclined plane, the second water guide mouth, the third water guide inclined plane and the third water guide mouth are utilized to form a stepped structure, so that on one hand, large water molecules can be discharged to the outside along the stepped structure under the action of gravity, and the water can not be accumulated in the stepped structure, thereby better assisting the water prevention of products, keeping the detection part clean and tidy, and prolonging the service life; on the other hand, compared with the vertical air inlet structure adopted in the prior art, even under the weather of strong wind and heavy rain, the rainwater is difficult to enter the inside through the stepped structure to be attached to the probe chip without using the filter sleeve, but the external air can directly enter the inside through the stepped structure, so that the sensor has faster response speed and more accurate measurement result compared with the sensor which enters the sensor after passing through the filter sleeve in the prior art.
4. The probe cover with the same size as the original structure can be adopted to quickly replace the original structure, and the replacement cost is low. The novel structure has good popularization and use values, and good economic and social benefits can be generated after wide popularization and application.
Drawings
Fig. 1 is a schematic diagram of a probe in the background of the invention.
Fig. 2 is a schematic diagram of the internal structure of a probe according to the background art of the invention.
Fig. 3 is a schematic view of a probe according to the present invention.
Fig. 4 is a schematic view of the internal structure of the probe (the circuit board is in the first position) according to the present invention.
Fig. 5 is a partial enlarged view of fig. 4.
Fig. 6 is another enlarged partial view of fig. 4.
Fig. 7 is a schematic view of the internal structure of the probe (circuit board in the second position) according to the present invention.
Fig. 8 is a partial enlarged view of fig. 7.
Fig. 9 is a cross-sectional view of a plug of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the following description will be made in detail with reference to the technical solutions in the embodiments of the present invention, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by a person skilled in the art without any inventive effort, are intended to be within the scope of the present invention, based on the embodiments of the present invention.
As shown in fig. 3-9, the probe structure of the temperature and humidity transmitter in this embodiment includes a housing 1, a plug 2, a circuit board 3, a probe chip 4 and a sealing member 5.
The shell 1 is of a hollow structure, one end of the shell is connected with a temperature and humidity transmitter body (not shown in the figure), and a plurality of air inlets are formed in the other end of the shell, so that external air enters the shell 1 and contacts with the probe chip 4 in the shell 1 to measure parameters such as temperature, humidity and the like. In some implementations, the housing 1 is integral. In other practical applications, for easy installation, the housing 1 is of a split structure, and in this embodiment, the housing 1 includes a probe rod 1-1 and a probe cover 1-2 that are screwed together. Specifically, the outer surface of the tail end of the probe rod 1-1 is provided with external threads, the inner wall of the probe cover 1-2 is provided with internal threads matched with the external threads, the external threads and the internal threads are connected through threads, and a waterproof gasket 1-3 is arranged between the external threads and the internal threads, so that rainwater is prevented from entering the shell 1 from the joint of the external threads and the internal threads, and the waterproof performance of a product is improved.
The plug 2 is arranged in the shell 1 and is in sealing contact with the inner wall of the shell 1; because probe structure one end is connected with temperature and humidity transmitter body (not shown in the figure), through set up end cap 2 in casing 1, separate casing 1 inner space into two parts, when guaranteeing that probe chip 4 can with external contact, can effectively avoid external water, steam to get into the temperature and humidity transmitter body through casing 1 inside cavity. The plug 2 is provided with a through hole 2-1.
A circuit board 3 movable between a first position and a second position with respect to the plug 2; the specific implementation mode can be as follows: a push rod 7 is arranged in the shell 1, one end of the push rod is embedded with a push rod nut 7-1, and the other end of the push rod is connected with the circuit board 3; a screw rod 6 in threaded connection with the push rod nut 7-1 is provided, the input end of the screw rod is connected with a power source (such as a motor and not shown in the figure), the rotation of the power source is converted into linear reciprocating motion of the push rod 7 by utilizing a screw rod nut structure, and the circuit board 3 is driven to move between a first position and a second position, so that the structure is simple.
As shown in fig. 4 and 5, when the circuit board 3 is in the first position, the tail end of the circuit board 3 is at least partially embedded into the through hole 2-1, and the through hole 2-1 is closed by matching the circuit board 3 with the rubber plug 2, so that the probe chip 4 is isolated from a cavity below the plug 2; thus, when the temperature and humidity transmitter is not used (for example, in the processes of storage, transportation and the like), the probe chip 4 and the circuit board 3 are sealed inside, and even if a filter sleeve is not arranged, the probe chip 4 can be effectively protected, and the problem that the precision is affected or even damaged due to long-term exposure of the probe chip 4 is avoided as much as possible. As shown in fig. 7 and 8, when the circuit board 3 is in the second position, the sealing member 5 disposed on the circuit board 3 seals the through hole 2-1, and the probe chip 4 is wholly located below the plug 2 and isolated from the cavity above the plug 2; in this way, the probe chip 4 is ensured to be capable of being in contact with external air for measurement, and meanwhile, external water vapor is prevented from entering the cavity above the plug 2 as much as possible.
Compared with the prior art, the structure design omits a filter sleeve on one hand, so that the product has faster response speed and more accurate measurement result; on the other hand when not using temperature and humidity transmitter (for example in the process of storage, transportation etc.), probe chip 4 and circuit board 3 are sealed in inside, can obtain effectual protection, avoid probe chip 4 to receive the problem that the precision receives the influence even damages because of exposing for a long time as far as possible.
As shown in fig. 8 and 9, as a preferred implementation of the present embodiment, the plug includes:
the body 2-2 is basically annular, and the through hole 2-1 penetrates through the body 2-2;
the sealing part 2-3 is basically annular, is integrally formed on the upper end surface of the body 2-2, at least partially stretches into the probe rod 1-1 and is in sealing contact with the inner wall of the probe rod 1-1;
in said second position, the seal 5 is at least partially embedded in the annular seal 2-3 and has its end face in sealing contact with the upper end face of the body 2-2 and its side face in sealing contact with the annular seal 2-3.
When the circuit board 3 is at the second position, the temperature and humidity transmitter is in a working state, better sealing is needed, the sealing element 5 is at least partially embedded into the annular sealing part 2-3, and better support and extrusion can be given to the annular sealing part 2-3, so that the sealing performance between the outer surface of the annular sealing part 2-3 and the inner wall of the probe rod 1-1 is better; meanwhile, the sealing contact between the end part of the sealing piece 5 and the body 2-2 is utilized to realize the first-stage sealing of the position of the through hole 2-1, the sealing contact between the side surface of the sealing piece 5 and the annular sealing part 2-3 is utilized to realize the second-stage sealing of the position of the through hole 2-1, the possibility that water vapor enters the cavity above the plug 2 through the through hole 2-1 can be further reduced, and a better waterproof sealing effect is achieved. In order to further improve the sealing effect of the side face of the seal member 5 with the annular seal portion 2-3, an annular projection is formed on the side wall of the seal member 5 in this embodiment.
As shown in fig. 8, the inner wall of the probe cover 1-2 is tapped with an internal thread, and a step part 1-2-1 is formed at the end of the internal thread; the end part of the probe rod 1-1 presses the edge part of the body 2-2 to the step part 1-2-1. The plug 2 can be fixed on the shell 1 by utilizing the threaded assembly of the probe cover 1-2 and the probe rod 1-1, and no structural member is required to be additionally arranged to fix the plug 2; meanwhile, the compaction sealing of the end part of the probe rod 1-1 and the plug body 2-2 and the compaction sealing of the step part 1-2-1 and the plug body 2-2 can be utilized to realize the further sealing of the joint of the probe cover 1-2 and the probe rod 1-1, so that the sealing effect is improved.
The size of the end of the circuit board 3 gradually increases along the movement direction from the first position to the second position. Therefore, when the circuit board 3 moves from the second position to the first position, a certain force can be generated between the plug 2 and the circuit board 3, and the sealing effect between the plug and the circuit board is ensured.
As shown in fig. 6, as still another preferred embodiment of the present example,
the probe cover 1-2 further comprises:
the first water guide inclined plane 1-2-2 is integrally formed on the side wall of the probe cover 1-2;
the first water guide port 1-2-3 is positioned at the downstream side of the first water guide inclined plane 1-2-2; the specific implementation mode can be as follows: one end of the first water guide inclined plane 1-2-2 is connected with the inner wall of the probe cover 1-2 (integrally formed), and a gap is reserved between the other end of the first water guide inclined plane and the inner wall of the probe cover 1-2 to form the first water guide mouth 1-2-3; of course, within the scope of the choice of the person skilled in the art, the realizations may also be: the first water guiding inclined plane 1-2-2 is connected with the inner wall of the probe cover 1-2, and a plurality of through holes are formed on the downstream side of the first water guiding inclined plane 1-2 (the downstream side of the first water guiding inclined plane is an inclined plane, and the downstream side of the first water guiding inclined plane is the downstream side of the flow direction when water flows on the first water guiding inclined plane) as the first water guiding ports 1-2-3;
the second water guiding inclined plane 1-2-4 is integrally formed on the side wall of the probe cover 1-2, and the upstream side of the second water guiding inclined plane is positioned below the first water guiding mouth 1-2-3, so that water flowing out through the first water guiding mouth 1-2-3 falls onto the second water guiding inclined plane 1-2-4;
the second water guide port 1-2-5 is positioned at the downstream side of the second water guide inclined plane 1-2-4; the specific implementation manner is the same as that of the first water guide port 1-2-3, and the detailed description is omitted.
The third water guiding inclined plane 1-2-6 is integrally formed on the side wall of the probe cover 1-2, and the upstream side of the third water guiding inclined plane is positioned below the second water guiding mouth 1-2-5, so that water flowing out through the second water guiding mouth 1-2-5 falls on the third water guiding inclined plane 1-2-6;
the third water guide port 1-2-7 is positioned at the downstream side of the third water guide inclined plane 1-2-6; the specific implementation manner is the same as that of the first water guide port 1-2-3, and the detailed description is omitted.
The first water guide inclined plane 1-2-2, the first water guide opening 1-2-3, the second water guide inclined plane 1-2-4, the second water guide opening 1-2-5, the third water guide inclined plane 1-2-6 and the third water guide opening 1-2-7 are utilized to form a stepped structure, so that on one hand, large water molecules can be discharged to the outside along the stepped structure under the action of gravity and cannot accumulate in the stepped structure, the product is better assisted in waterproof, the detection part (probe chip) can be kept clean and tidy, and the service life is prolonged; on the other hand, compared with the vertical air inlet structure adopted in the prior art, even under the condition of heavy wind and heavy rain, the rainwater is difficult to enter the inside through the stepped structure to be attached to the probe chip 4 without using the filtering sleeve, but the external air can directly enter the inside through the stepped structure, so that the device has faster response speed and more accurate measurement result compared with the prior art.
In order to enable macromolecular water to be discharged faster, the waterproof spray is sprayed on the side wall of the probe cover 1-2, the first water guide inclined plane 1-2-2, the second water guide inclined plane 1-2-4 and the third water guide inclined plane 1-2-6.
In order to obtain better drainage effect and air intake effect, the side wall of the probe cover 1-2 is provided with water outlets 1-2-8 corresponding to the second water guiding inclined plane 1-2-4 and/or the downstream side of the third water guiding inclined plane 1-2-6; the probe cover 1-2 also comprises a plurality of water outlet holes 1-2-9 positioned at the tail end of the probe cover 1-2.
In practical application, in the initial stage, the circuit board 3 and the rubber plug 2 are matched to realize primary sealing, and the probe chip 4 and the circuit board 3 are sealed inside, so that the probe chip 4 can be effectively protected. After the temperature and humidity transmitter product is electrified, the circuit board 3 is driven by a power source (such as a motor, not shown in the figure) to move downwards, the probe chip 4 is integrally moved to the lower part of the plug 2 from the first position to the second position and isolated from a cavity above the plug 2, and a sealing piece 5 on the circuit board 3 is matched with the plug 2 to realize sealing, so that external water vapor is prevented from entering the cavity above the plug 2 as much as possible, as shown in fig. 7 and 8; meanwhile, external air can enter the probe through the stepped structure on the probe cover 1-2, the water outlets 1-2-8 and the water outlets 1-2-9, and is in direct contact with the probe chip 4, so that the response speed is higher, and the external temperature and humidity are accurately reflected. After the temperature and humidity transmitter product is powered off, under the drive of a power source (such as a motor, not shown in the drawing), the circuit board 3 moves upwards, and moves from the second position to the first position, as shown in fig. 4 and 5, the probe chip 4 and the circuit board 3 are sealed inside, and even if a filter sleeve is not arranged, the temperature and humidity transmitter product can be effectively protected, and the problem that the precision of the probe chip 4 is affected or even damaged due to long-term exposure is avoided as far as possible.
The foregoing examples of the various embodiments are provided to further aid in understanding the aspects of the present invention and are not intended to limit the technical aspects of the present invention, although the present invention has been described in detail with reference to the foregoing examples, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the invention.
Claims (10)
1. A temperature and humidity transmitter probe structure, characterized by comprising:
a housing (1);
the plug (2) is arranged in the shell (1) and is in sealing contact with the inner wall of the shell (1); the through hole (2-1) is arranged on the upper part;
a circuit board (3) movable between a first position and a second position relative to the plug (2);
when in the first position, the tail end of the circuit board (3) is at least partially embedded into the through hole (2-1), the through hole (2-1) is closed, and the probe chip (4) arranged on the circuit board (3) is isolated from a cavity below the plug (2); when the probe chip is in the second position, a sealing piece (5) arranged on the circuit board (3) seals the through hole (2-1), and the probe chip (4) is wholly positioned below the plug (2) and isolated from a cavity above the plug (2);
the shell (1) comprises a probe rod (1-1) and a probe cover (1-2) which are connected through threads;
the probe cover (1-2) further comprises:
a first water guiding inclined plane (1-2-2) arranged on the side wall of the probe cover (1-2);
a first water guide port (1-2-3) located on the downstream side of the first water guide slope (1-2-2);
a second water guiding inclined plane (1-2-4) which is arranged on the side wall of the probe cover (1-2) and the upstream side of which is positioned below the first water guiding mouth (1-2-3);
a second water guide port (1-2-5) positioned on the downstream side of the second water guide inclined surface (1-2-4);
the plug (2) comprises:
a body (2-2) which is substantially annular;
a sealing part (2-3) which is basically annular and is arranged on the upper end surface of the body (2-2);
in said second position, the seal (5) is at least partially embedded in the annular seal (2-3).
2. The temperature and humidity transmitter probe structure of claim 1, further comprising:
the input end of the screw rod (6) is connected with a power source;
and one end of the push rod (7) is embedded with a push rod nut (7-1) in threaded connection with the output end of the screw rod (6), and the other end of the push rod is connected with the circuit board (3) so as to force the circuit board (3) to move between a first position and a second position relative to the plug (2).
3. The temperature and humidity transmitter probe structure according to claim 1, wherein the sealing part (2-3) is integrally formed on the upper end surface of the body (2-2), at least partially stretches into the probe rod (1-1) and is in sealing contact with the inner wall of the probe rod (1-1);
in the second position, the sealing element (5) is at least partially embedded in the annular sealing part (2-3), the end face of the sealing element is in sealing contact with the upper end face of the body (2-2), and the side face of the sealing element is in sealing contact with the annular sealing part (2-3).
4. A temperature and humidity transmitter probe structure according to claim 3, wherein an inner thread is tapped on the inner wall of the probe cover (1-2), and a step part (1-2-1) is formed at the end of the inner thread; the edge part of the body (2-2) is pressed on the step part (1-2-1) by the end part of the probe rod (1-1).
5. The temperature and humidity transmitter probe structure according to claim 1, wherein the size of the tail end of the circuit board (3) gradually increases along the movement direction from the first position to the second position.
6. The temperature and humidity transmitter probe structure according to claim 1, wherein the first water guiding inclined plane (1-2-2) is integrally formed on the side wall of the probe cover (1-2); the second water guiding inclined plane (1-2-4) is integrally formed on the side wall of the probe cover (1-2).
7. The temperature and humidity transmitter probe structure according to claim 1, wherein the probe cover (1-2) further comprises:
the third water guide inclined plane (1-2-6) is integrally formed on the side wall of the probe cover (1-2), and the upstream side of the third water guide inclined plane is positioned below the second water guide opening (1-2-5);
and a third water guide port (1-2-7) positioned on the downstream side of the third water guide inclined surface (1-2-6).
8. The temperature and humidity transmitter probe structure according to claim 7, wherein waterproof spray is sprayed on the side wall of the probe cover (1-2), the first water guide inclined plane (1-2-2), the second water guide inclined plane (1-2-4) and the third water guide inclined plane (1-2-6).
9. The temperature and humidity transmitter probe structure according to claim 7, wherein the side wall of the probe cover (1-2) is provided with a water outlet (1-2-8) corresponding to the second water guiding inclined plane (1-2-4) and/or the downstream side of the third water guiding inclined plane (1-2-6).
10. The temperature and humidity transmitter probe structure according to claim 1, wherein the probe cover (1-2) further comprises a plurality of water outlets (1-2-9) at the tail end of the probe cover (1-2).
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