CN222231740U - Thermometer and Hygrometer - Google Patents

Abstract

The utility model provides a hygrothermograph which comprises a shell, a circuit board and a sealing component, wherein the circuit board and the sealing component are arranged in the shell, the shell is provided with a through hole, a temperature and humidity detection component is integrated on the circuit board and comprises a probe, the probe is opposite to the through hole, the sealing component comprises an abutting piece and a breathable film, the breathable film covers an opening of the through hole in the shell, and two sides of the abutting piece are respectively abutted against the circuit board and the breathable film to fix the breathable film. The shell of the hygrothermograph is provided with a through hole, the probe of the hygrothermograph is arranged in the shell, the probe is right opposite to the through hole, the through hole is covered with a breathable film, the through hole is sealed by the breathable film, so that external water drops, dust and harmful substances are prevented from entering the shell, but water molecules or water vapor can permeate the breathable film, and the probe can conveniently detect the external temperature and humidity.

Description

Hygrothermograph

Technical Field

The utility model belongs to the field of temperature and humidity detection, and particularly relates to a hygrothermograph.

Background

The hygrothermograph is used as an important tool for measuring environmental temperature and humidity, and is widely applied to a plurality of fields such as industry, agriculture, medical treatment, home furnishing and the like. The core component, namely the detection probe, is directly responsible for interacting with the temperature and humidity in the environment and converting the physical quantities into readable data.

Conventional hygrothermographs have some inherent problems in the structural design of the probe, for example, the detection probe of the hygrothermograph is usually designed as a bare type, i.e. directly exposed to the external environment, without or with very simple protective measures. This design, while straightforward, also results in the probe being extremely susceptible to external objects such as water, gas, dust, etc. The water drops can directly infiltrate into the probe to cause circuit short circuit or corrosion to cause failure of the hygrothermograph, dust and particles can cover the surface of the probe to form a layer of barrier layer to influence the accuracy of temperature and humidity detection, and chemical substances and pollutants in the air can react with probe materials to change the physical and chemical characteristics of the probe, so that the detection probe is easy to age in the long-term use process, and the measurement accuracy and the service life of the detection probe are reduced.

Therefore, the traditional hygrothermograph has the defects of easy interference by external environment, unstable detection precision, short service life and the like in the structural design of the probe, and is difficult to meet the requirements of modern application on high-precision and high-stability temperature and humidity measurement.

Disclosure of utility model

The primary object of the present utility model is to solve at least one of the above problems and provide a hygrothermograph.

In order to meet the purposes of the utility model, the utility model adopts the following technical scheme:

One of the objects of the present utility model is to provide a hygrothermograph comprising a housing, a circuit board disposed in the housing and a sealing assembly,

The shell is provided with a through hole,

The temperature and humidity detection assembly is integrated on the circuit board and comprises a probe which is arranged opposite to the through hole,

The sealing assembly comprises an abutting part and a breathable film, the breathable film covers the opening of the through hole in the shell, and two sides of the abutting part are respectively abutted to the circuit board and the breathable film so as to fix the breathable film.

Further, a mounting hole is formed in the abutting piece, the probe is accommodated in the mounting hole, and the probe detects the temperature and the humidity of the external environment through the breathable film.

Further, the two sides of the breathable film cover the through hole and the mounting hole respectively, and the aperture of the mounting hole is larger than or equal to that of the through hole.

Specifically, a plurality of film holes are formed in the breathable film, and the aperture of the film holes is 0.1-10 mu m.

Specifically, the abutting piece is in transition fit or interference fit with the breathable film.

In one embodiment, a supporting frame is further arranged in the housing, the circuit board is arranged on a supporting surface of the supporting frame, the housing comprises a top plate, the through hole is arranged on the top plate, the top plate and the supporting surface are arranged in parallel, and the distance between the top plate and the supporting surface is smaller than or equal to the sum of the thickness of the circuit board and the height of the abutting piece.

In one embodiment, the shell comprises a shell body and a bottom cover which are assembled, a convex edge is arranged on the edge of the bottom cover, an annular groove is arranged on the convex edge,

The shell comprises a plurality of side plates, the side plates are sequentially connected and arranged around the edge of the bottom cover, the opening of the annular groove faces the side plates, the annular groove is matched with the side plates to form a sealing annular hole, and a flexible sealing element is correspondingly arranged in the sealing annular hole.

In one embodiment, the shell comprises a shell body and a decorative cover, an assembly groove is formed in a top plate of the shell body, the decorative cover is arranged in the assembly groove, at least one ultrasonic line is arranged between the decorative cover and the assembly groove, the ultrasonic line is melted through ultrasonic waves, and the decorative cover is connected with the assembly groove after condensation.

Specifically, still be equipped with power supply unit in the shell, power supply unit includes the battery compartment, the battery compartment with the circuit board electricity is connected.

Specifically, the circuit board is integrated with a control unit, the control unit is electrically connected with the temperature and humidity assembly, the temperature and humidity assembly outputs temperature and humidity signals obtained by detection of the probe to the control unit, and the control unit converts the temperature and humidity signals into temperature and humidity information.

The present utility model has many advantages over the prior art, including but not limited to:

On one hand, the shell of the hygrothermograph is provided with the through hole, the probe is arranged in the shell, the probe faces the through hole, the through hole is covered with the breathable film, and the breathable film is used for preventing external water drops, dust and large-particle harmful substances from invading into the shell, so that electronic devices of the hygrothermograph, especially the probe, are protected, and therefore, the interference of the external environment is avoided, the detection precision is improved, the service life is prolonged, and the breathable film can penetrate through water molecules or water vapor, so that the probe arranged in the shell can detect temperature and humidity data of the external environment.

On the other hand, the abutting piece abuts the breathable film on the shell, so that the breathable film cannot fall from the through hole, the breathable film can well cover the through hole, the structural stability of the hygrothermograph is maintained, and the breathable film can continuously block water drops, dust and large-particle harmful substances to protect electronic devices inside the hygrothermograph.

Drawings

The foregoing and/or additional aspects and advantages of the utility model will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings, in which:

Fig. 1 is a schematic perspective view of a hygrothermograph according to an exemplary embodiment of the present utility model.

Fig. 2 is an exploded view of a hygrothermograph according to an exemplary embodiment of the present utility model.

Fig. 3 is a schematic circuit diagram of a hygrothermograph according to an exemplary embodiment of the present utility model.

Fig. 4 is a schematic view of a part of a hygrothermograph according to an exemplary embodiment of the present utility model.

Fig. 5 is a schematic structural view of a decorative cover of a hygrothermograph according to an exemplary embodiment of the present utility model.

Fig. 6 is a schematic structural view of a housing of a hygrothermograph according to an exemplary embodiment of the present utility model.

FIG. 7 is a schematic cross-sectional view of a hygrothermograph of an exemplary embodiment of the present utility model.

Fig. 8 is an enlarged view of a portion a of fig. 7.

Fig. 9 is an enlarged view of a portion B of fig. 7.

Detailed Description

Embodiments of the present utility model are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are exemplary only for explaining the present utility model and are not to be construed as limiting the present utility model.

As used herein, the singular forms "a", "an", "the" and "the" are intended to include the plural forms as well, unless expressly stated otherwise, as understood by those skilled in the art. It will be further understood that the terms "comprises" and/or "comprising," when used in this specification, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof. It will be understood that when an element is referred to as being "connected" or "coupled" to another element, it can be directly connected or coupled to the other element or intervening elements may also be present. Further, "connected" or "coupled" as used herein may include wirelessly connected or wirelessly coupled. The term "and/or" as used herein includes all or any element and all combination of one or more of the associated listed items.

It will be understood by those skilled in the art that all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this utility model belongs unless defined otherwise. It will be further understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the prior art and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein.

The utility model provides a hygrothermograph, wherein a through hole is formed in a shell of the hygrothermograph, a probe of the hygrothermograph is arranged in the shell and is opposite to the through hole, a breathable film is covered on the through hole, the through hole is sealed by the breathable film so as to prevent external water drops, dust and harmful substances from entering the shell, and air and water molecules can penetrate through the breathable film so as to facilitate the probe to detect the external temperature and humidity.

In an exemplary embodiment of the present utility model, referring to fig. 1 and 2, the hygrothermograph 100 includes a housing 110, a circuit board 120 and a sealing assembly, wherein the circuit board 120 and the sealing assembly are disposed in the housing 110.

Referring to fig. 3, the circuit board 120 is integrated with a temperature and humidity detecting assembly 140 and a control unit 151, and the control unit 151 is electrically connected with the temperature and humidity detecting assembly 140. The temperature and humidity detection assembly 140 comprises a temperature and humidity detection circuit 141 and a probe 142, the probe 142 comprises a temperature detection element 143 and a humidity detection element 144, and the temperature detection element 143 and the humidity detection element 144 are respectively and electrically connected with the temperature and humidity detection circuit 141.

After the temperature detecting element 143 detects and acquires a temperature signal, the temperature and humidity detecting component 140 outputs the temperature signal to the control unit 151, the control unit 151 converts the temperature signal into temperature information, the humidity detecting element 144 detects and acquires a humidity signal, the temperature and humidity detecting component 140 outputs the humidity signal to the control unit 151, and the control unit 151 converts the humidity signal into humidity information.

Referring to fig. 1, 2 and 8, a through hole 1111 is formed in the housing 110, and external air can enter the housing 110 through the through hole 1111. The probe 142 is disposed opposite to the through hole 1111, so that the probe 142 can rapidly detect temperature and humidity data of the external environment. In the present embodiment, the housing 110 includes a top plate 111, and the through hole 1111 is provided in the top plate 111. The circuit board 120 is disposed parallel to the top plate 111, and the probe 142 is disposed opposite to the through hole 1111.

The sealing assembly includes a gas permeable membrane 131 and an abutting part 132, the through hole 1111 includes two openings, the opening formed in the housing 110 is referred to as a first opening 1112, the gas permeable membrane 131 covers the first opening 1112, that is, the gas permeable membrane 131 seals the first opening 1112, so as to prevent water drops, dust and harmful substances in the external environment from entering the housing 110 through the first opening 1112, and protect the circuit on the circuit board 120, especially protect the probe 142.

The breathable film 131 is provided with a plurality of film holes (not shown), and the aperture of the film holes is 0.1-10 μm. Because the pore diameter of the membrane pores is 0.1-10 μm, the harmful substances of water drops, dust and large particles cannot pass through the membrane pores, so that the harmful substances of water drops, dust and large particles are prevented from entering the housing 110 by the ventilation membrane 131, thereby protecting the electronic circuit of the hygrothermograph 100.

In addition, the water drops are a whole, and interaction force exists among water molecules in the water drops, so that the water molecules in the water drops are closely connected together to form a relatively stable whole. This allows the water droplets to maintain their form in a normal state without spontaneously dispersing into individual water molecules, so that when the water droplets are dropped on the air-permeable membrane 131, the water molecules on the water droplets are not separated from the water droplets, and it can be understood that the water molecules on the water droplets also do not penetrate the air-permeable membrane 131 and enter the housing 110.

However, the water molecules or the water vapor in the air are in a free state, and the volume of the water molecules or the water vapor is smaller, so that the water molecules or the water vapor in the external environment can enter the housing 110 through the membrane hole, so that the probe 142 can detect the external humidity conveniently.

Thus, water drops, dust and large-particle harmful substances can be prevented by the air-permeable membrane 131, but water molecules or water vapor of the external environment can enter the housing 110 through the air-permeable membrane 131 so that the probe 142 can detect the external humidity.

The abutting piece 132 is disposed in the housing 110, and the abutting piece 132 is configured to abut the air permeable membrane 131 on the top plate 111, so that the air permeable membrane 131 can stably cover the first opening 1112 without falling from the first opening 1112, and thus the air permeable membrane 131 can well block water drops, dust and large-particle harmful substances in the external environment.

The abutting piece 132 is disposed on the circuit board 120, and the circuit board 120 is disposed parallel to the top plate 111 at intervals. The two sides of the contact member 132 are respectively contacted with the circuit board 120 and the air permeable membrane 131, that is, the air permeable membrane 131 is contacted with the top plate 111.

Specifically, referring to fig. 4 and 6, the circuit board 120 includes a first surface 121, the top plate 111 includes a second surface 1113, the first surface 121 and the second surface 1113 are disposed opposite to each other, the first opening 1112 is disposed on the second surface 1113, and the probe 142 is disposed on the first surface 121. Referring to fig. 8 again, the two ends of the abutting piece 132 are respectively abutted against the first surface 121 and the second surface 1113, so that the abutting piece 132 can be stably disposed in the housing 110, and the abutting piece 132 can stably abut the air permeable membrane 131 against the second surface 1113, and the air permeable membrane 131 cannot fall from the first opening 1112, so as to maintain the structural stability of the hygrothermograph 100.

The abutment 132 is in transition fit or interference fit with the air permeable membrane 131 to eliminate the gap between the air permeable membrane 131 and the second surface 1113, so that water drops, dust and large-particle harmful substances in the external environment cannot enter the housing 110 through the gap between the air permeable membrane 131 and the second surface 1113, thereby protecting the electronic devices in the housing 110.

In an exemplary embodiment of the present utility model, referring to fig. 2, 4 and 8, a mounting hole 1321 is provided in the abutment member 132, the mounting hole 1321 is a through hole, and two openings of the mounting hole 1321 are a second opening and a third opening 1323, respectively. The abutment 132 is disposed on the first surface 121, and the first surface 121 closes the second opening. The abutting piece 132 abuts against the second surface 1113 to abut the air-permeable membrane 131 against the second surface 1113, so that the air-permeable membrane 131 closes the third opening 1323.

The mounting hole 1321 has a hole diameter greater than or equal to the hole diameter of the through hole 1111 such that the area of the third opening 1323 is greater than or equal to the area of the first opening 1112. When the mounting hole 1321 is abutted against the through hole 1111, the first opening 1112 is located in the third opening 1323, or the first opening 1112 and the third opening 1323 are overlapped, so that the abutting member 132 can well abut the air permeable membrane 131 against the second surface 1113.

The third opening 1323 of the mounting hole 1321 is also covered by the air-permeable film 131 covering the first opening 1112, so that an air-permeable closed space is formed by surrounding the mounting hole 1321, the first surface 121 and the air-permeable film 131. Referring to fig. 4 and 8, the probe 142 is disposed in the mounting hole 1321, that is, the probe 142 is disposed in the air-permeable closed space. When external water molecules or water vapor enter the air-permeable closed space through the film holes on the air-permeable film 131, the water molecules or water vapor cannot further invade the housing 110 due to the blocking of the mounting holes 1321 and the first surface 121, so as to protect the electronic devices of the hygrothermograph 100.

In one embodiment, the abutment 132 is made of a silicone material that is a gas impermeable material such that water molecules or water vapor cannot permeate out of the mounting hole 1321 and the circuit board 120 into the housing 110. Moreover, the abutting piece 132 further has a buffering function, when the top plate 111 receives an external force, the external force can be buffered by the abutting piece 132 made of a silica gel material, so that the hygrothermograph 100 is prevented from being damaged by an external force.

In one embodiment, referring to fig. 2, 3 and 7, a supporting frame 161 is further disposed in the housing 110, the housing 110 further includes a bottom cover 112, the bottom cover 112 is disposed opposite to the top plate 111, and the supporting frame 161 is disposed on the bottom cover 112. The support 161 is provided with a support surface 1611, the support surface 1611 is disposed opposite to the second surface 1113 of the top plate 111, and the circuit board 120 is disposed on the support surface 1611. The supporting surface 1611 is parallel to the second surface 1113, and a distance between the supporting surface 1611 and the second surface 1113 is smaller than or equal to a sum of a thickness of the circuit board 120 and a height of the abutting piece 132, so that the abutting piece 132 is in transition fit or interference fit with the second surface 1113, and the abutting piece 132 can stably abut the air permeable membrane 131 on the second surface 1113.

In one embodiment, referring to fig. 2 and 9, the housing 110 includes a shell 118 and the bottom cover 112, and the bottom cover 112 is fastened to the shell 118. The edge of the bottom cover 112 is provided with a convex edge 1121, and the convex edge 1121 extends along the edge of the bottom cover 112 to form a convex edge 1121 with a ring structure. An annular groove 1122 is provided on the convex edge 1121, and the annular groove 1122 extends along the extending direction of the convex edge 1121 to form the annular groove 1122 of an annular structure.

The housing 118 further includes a plurality of side plates 113, and the plurality of side plates 113 are sequentially connected to each other along the edge of the bottom cover 112. The openings of the annular grooves 1122 are disposed toward the side plates 113, and the annular grooves 1122 cooperate with the plurality of side plates 113 to form the sealing ring holes 114. The seal ring 114 is internally provided with a flexible seal member 171, and the flexible seal member 171 is arranged in an extending manner along the extending direction of the seal ring 114, so that the flexible seal member 171 forms an annular structure. External water drops or moisture are prevented from entering the case 110 through the gap between the case 118 and the bottom cover 112 by the flexible seal 171 to protect the electronics of the hygrothermograph 100.

In one embodiment, in conjunction with fig. 7, a power module is further disposed in the housing 110, and the power module includes a battery compartment 152, where the battery compartment 152 is electrically connected to the circuit on the circuit board 120, and the battery compartment 152 may house a battery 153, and the battery 153 supplies power to the circuit on the circuit board 120 via the battery compartment 152. By removing the bottom cover 112, a battery 153 may be installed or replaced for the battery compartment 152.

In one embodiment, the top plate 111 described in connection with fig. 2 further includes a third face 1114, the third face 1114 being disposed opposite the second face 1113, and the third face 1114 being disposed outside the housing 110. The top plate 111 is further provided with an assembly groove 115, and the assembly groove 115 is recessed from the third face 1114 toward the second face 1113. The housing 110 is further provided with a decorative cover 116, the decorative cover 116 is assembled in the assembly groove 115, and the aesthetic degree of the hygrothermograph 100 is improved by arranging the decorative cover 116.

In a further embodiment, referring to fig. 2 and fig. 5, at least one ultrasonic line 117 is disposed between the decorative cover 116 and the bottom of the assembly groove 115, and the ultrasonic line 117 is melted by the high-frequency vibration of the ultrasonic wave, so that the melted ultrasonic line 117 is respectively fused with the decorative cover 116 and the bottom of the assembly groove 115, and after the melted ultrasonic line 117 is cooled and solidified, the decorative cover 116 and the assembly groove 115 are respectively and fixedly connected, so that the decorative cover 116 and the assembly groove 115 can be stably connected.

In this embodiment, an ultrasonic line (referred to as a first ultrasonic line 1171) is provided on the decorative cover 116, and the first ultrasonic line 1171 extends along the edge of the decorative cover 116 to form a ring-shaped structure. An ultrasonic line (referred to as a second ultrasonic line 1172) is provided on the fitting groove 115, and the second ultrasonic line 1172 extends along the edge of the groove bottom of the fitting groove 115 to form a ring-shaped structure. The decorative cover 116 can be firmly connected with the fitting groove 115 by the first ultrasonic line 1171 and the second ultrasonic line 1172. Preferably, a plurality of ultrasonic lines may be further disposed on the decorative cover 116, so that the decorative cover 116 is further firmly connected with the assembly groove 115.

In summary, according to the hygrothermograph disclosed by the utility model, the through hole of the shell is provided with the breathable film so as to prevent external water drops, dust and large-particle harmful substances from entering the shell, so that the electronic device of the hygrothermograph is protected, but the breathable film can enable water molecules or water vapor with small volume to permeate, and a probe facing the through hole can detect the temperature and the humidity of an external environment.

The above description is only illustrative of the preferred embodiments of the present utility model and of the principles of the technology employed. It will be appreciated by persons skilled in the art that the scope of the utility model referred to in the present utility model is not limited to the specific combinations of the technical features described above, but also covers other technical features formed by any combination of the technical features described above or their equivalents without departing from the inventive concept described above. Such as the above-mentioned features and the features having similar functions (but not limited to) of the utility model.

Although the subject matter has been described in language specific to structural features and/or methodological acts, it is to be understood that the subject matter defined in the appended claims is not necessarily limited to the specific features or acts described above. Rather, the specific features and acts described above are example forms of implementing the claims.

Claims (10)

1. A thermometer and hygrometer, comprising a housing, a circuit board and a sealing assembly arranged in the housing, The housing is provided with a through hole, The circuit board is integrated with a temperature and humidity detection component, and the temperature and humidity detection component includes a probe, and the probe is arranged directly opposite to the through hole. The sealing component comprises a contact piece and a breathable membrane. The breathable membrane covers the opening of the through hole in the housing. Two sides of the contact piece respectively contact the circuit board and the breathable membrane to fix the breathable membrane. 2. The thermometer and hygrometer according to claim 1, characterized in that a mounting hole is provided in the abutment member, and the mounting hole accommodates the probe so that the probe detects the temperature and humidity of the external environment through the breathable membrane. 3. The thermometer and hygrometer according to claim 2, characterized in that two sides of the breathable membrane cover the through hole and the mounting hole respectively, and the aperture of the mounting hole is greater than or equal to the aperture of the through hole. 4. The thermometer and hygrometer according to claim 1, characterized in that the air permeable membrane is provided with a plurality of membrane holes, and the pore size of the membrane holes is 0.1-10 μm. 5. The thermometer and hygrometer according to any one of claims 1 to 3, characterized in that the abutment member and the breathable membrane have a transition fit or an interference fit. 6. The thermometer and hygrometer as described in claim 1 or 2 is characterized in that a support frame is also provided in the shell, the circuit board is arranged on the support surface of the support frame, the shell includes a top plate, the through hole is arranged on the top plate, the top plate is arranged parallel to the support surface, and the distance between the top plate and the support surface is less than or equal to the sum of the thickness of the circuit board and the height of the abutment. 7. The thermometer and hygrometer according to claim 1, characterized in that the housing comprises a shell and a bottom cover assembled together, a convex edge is provided on the edge of the bottom cover, and an annular groove is provided on the convex edge, The shell includes a plurality of side plates, which are connected and arranged in sequence around the edge of the bottom cover, the opening of the annular groove faces the side plate, the annular groove cooperates with the plurality of side plates to form a sealing ring hole, and a flexible sealing member is correspondingly arranged in the sealing ring hole. 8. The thermometer and hygrometer according to claim 1 is characterized in that the outer shell includes a shell and a decorative cover, a mounting groove is provided on the top plate of the shell, the decorative cover is arranged in the mounting groove, at least one ultrasonic line is provided between the decorative cover and the mounting groove, the ultrasonic line is melted by ultrasonic wave, and the decorative cover and the mounting groove are connected after condensation. 9. The thermometer and hygrometer as claimed in claim 1, characterized in that a power supply component is also provided in the housing, the power supply component includes a battery compartment, and the battery compartment is electrically connected to the circuit board. 10. The thermometer and hygrometer according to claim 1 is characterized in that a control unit is integrated on the circuit board, the control unit is electrically connected to the temperature and humidity component, the temperature and humidity component outputs the temperature and humidity signals obtained by the probe detection to the control unit, and the control unit converts the temperature and humidity signals into temperature and humidity information.