JP3215117U - Internal heat insulation structure of measuring device - Google Patents

Abstract

An internal heat insulating structure of a measuring device is provided. A housing 10 includes an internal space 100 and a first shielding wall 11 and a second shielding wall 12 provided in the internal space, and the first shielding wall and the second shielding wall define the first space. The space 101, the second space 102, and the third space 103 formed between the first shielding wall and the second shielding wall are divided, and the third space does not communicate with the first space and the second space. The electronic module 20 is disposed in the first space and includes a circuit board and a heat generating electronic element combined with the circuit board. The sensor element 30 is disposed in the second space and is electrically connected to the circuit board. The air blocking layer 40 is located in the third space and blocks the heat generated from the heat generating electronic element from being transmitted to the sensor element. According to this, the accuracy at the time of measurement of the sensor element is maintained. [Selection] Figure 6

Description

  The present invention relates to a measuring apparatus, and more particularly to an internal heat insulating structure of the measuring apparatus.

  Usually, the measurement apparatus includes a housing, a circuit board fixed in the housing, an electronic component such as a microprocessor provided on the circuit board, and a sensor element electrically connected to the circuit board. Among these, the sensor element is provided as a measurement element such as a temperature sensor. During the operation process of the measuring apparatus, heat generated from the internal electronic components may affect the accuracy of the sensor element, leading to measurement errors.

  At present, the measurement error of the measuring apparatus is mostly reduced by correction by software. However, if the heat storage time is too long, an error value that is outside the specification is generated in the method of correcting the measurement error due to the sensor element by software. Furthermore, not only the loss of accuracy of the sensor due to heat storage but also the measurement apparatus can generate different flow fields inside the housing due to the difference in the arrangement angle. Therefore, when the measured value is corrected with the same software even though the heat distribution in the casing is different, there is a very large error between the corrected numerical value and the actual environment numerical value.

  Therefore, how to avoid the loss of accuracy of the sensor element due to the heat storage of the measuring device and the difference in the arrangement position became a motivation for the inventor.

  An object of the present invention is to provide an internal heat insulation structure of a measuring device in which loss of accuracy of a sensor element due to heat storage of the measuring device or a difference in arrangement position is avoided.

  In order to achieve the above object, the present invention relates to an internal heat insulating structure of a measuring apparatus including a housing, an electronic module, a sensor element, and an air blocking layer. The housing includes an internal space, and a first shielding wall and a second shielding wall provided in the internal space, and the first shielding wall and the second shielding wall define the internal space as the first space, the second space, and the second space. The first space is divided into a third space formed between the shielding wall and the second shielding wall, and the third space does not communicate with the first space and the second space. An electronic module is disposed in the first space and includes a circuit board and a heat generating electronic element combined with the circuit board. The sensor element is disposed in the second space and is electrically connected to the circuit board. The air blocking layer is located in the third space and blocks heat generated from the heat generating electronic element from being transmitted to the sensor element.

  Compared with the prior art, the internal heat insulating structure of the measuring device according to the present invention is provided with a first shielding wall, a second shielding wall, and an air shielding layer located between the first shielding wall and the second shielding wall. Air has an extremely large physical property of heat insulation, which forms a heat-insulating protective layer. Therefore, the heat generated from the heat generating electronic element is blocked by the air blocking layer and is not transmitted to the sensor element. The air blocking layer is not only capable of blocking the heated air from being transmitted to the sensor element by convection. Since the heat conduction coefficient of air itself is lower than that of a conventional heat insulating material, it is possible to minimize the influence of the heating element on the sensor element even in heat transfer. Therefore, the influence on the measurement accuracy of the sensor element due to heat storage is avoided.

FIG. 1 is a perspective view showing an appearance of a measuring apparatus according to the present invention. FIG. 2 is an exploded perspective view showing a part of the measuring apparatus according to the present invention. FIG. 3 is an exploded perspective view showing another part of the measuring apparatus according to the present invention. FIG. 4 is a perspective view showing the assembly of the measuring device according to the present invention. FIG. 5 is a sectional view from one side of the measuring apparatus according to the present invention. FIG. 6 is a sectional view from the other side of the measuring apparatus according to the present invention.

  The details and technical contents of the present invention will be described as follows in combination with the drawings. However, the drawings are for reference and explanation, and are not intended to limit the present invention.

  Please refer to FIGS. These are a perspective view showing the external appearance of the measuring apparatus according to the present invention, an exploded perspective view showing a part of the measuring apparatus, an exploded perspective view showing another part of the measuring apparatus, and a diagram showing the assembly of the measuring apparatus. The present invention relates to an internal heat insulating structure of the measuring apparatus 1 including a housing 10, an electronic module 20, a sensor element 30, and an air blocking layer 40 (see FIG. 6). The electronic module 20 and the sensor element 30 are built in the housing 10, and the air blocking layer 40 is provided between the electronic module 20 and the sensor element 30. As a result, heat generated during operation of the electronic module 20 is blocked from being transmitted to the sensor element 30, thereby avoiding a situation where the sensor element 30 is affected by temperature and loses accuracy during measurement. The The details of the internal heat insulation structure of the measuring device 1 will be described later.

  The housing 10 includes an internal space 100 and a first shielding wall 11 and a second shielding wall 12 provided in the internal space 100. The first shielding wall 11 and the second shielding wall 12 form the internal space 100 between the first space 101, the second space 102, and the first shielding wall 11 and the second shielding wall 12. Dividing into a third space 103. The third space 103 does not communicate with either the first space 101 or the second space 102. Preferably, a plurality of support ribs 111 are provided on one side surface of the first shielding wall 11 in order to strengthen the supporting force of the first shielding wall 11.

  In the present embodiment, the housing 10 includes a first housing 10a and a second housing 10b that are combined with each other. The casing 10 is provided with a plurality of heat radiation holes 13. Further, the first space 101, the second space 102, and the third space 103 communicate with the outside through the heat radiating holes 13 so that the internal space 100 can radiate heat.

  The electronic module 20 is disposed in the first space 101. The electronic module 20 includes a circuit board 21 and at least one heat generating electronic element 22 combined with the circuit board 21.

  Further, the sensor element 30 is disposed in the second space 102 and is electrically connected to the circuit board 21. In one embodiment of the present invention, the sensor element 30 is a temperature sensor. Further, the sensor element 30 is provided close to one side of the casing 10 in the second space 102 so as to easily measure the external temperature.

  The air blocking layer 40 (see FIG. 6) is located in the third space 103. During operation of the electronic module 20, heat generated from the heat generating electronic element 22 is blocked by the air blocking layer 40, so that it is not transmitted to the sensor element 30. In other words, the air blocking layer 40 is stationary air that fills between the first shielding wall 11 and the second shielding wall 12. Air has an extremely large physical property of heat insulation, which forms a heat-insulating protective layer.

  The air blocking layer 40 is not only capable of blocking heat from being transferred to the sensor element 30 by convection. Since the heat conduction coefficient of air itself is lower than that of a conventional heat insulating material, it is possible to minimize the influence of the heating element on the sensor element even in heat transfer.

  In addition, the internal heat insulation structure of the measuring device 1 according to the present invention is provided by providing the air blocking layer 40 to block the heated air from being transmitted to the sensor element 30 by convection. Therefore, only the heat conduction path is left between the heat generating electronic element 22 and the sensor element 30, and it is possible to avoid the measurement accuracy loss of the sensor element 30 due to thermal convection. Therefore, the measurement result of the sensor element 30 does not change depending on how the measurement apparatus 1 is arranged.

  Reference is made to FIGS. 5 and 6 which are sectional views from two directions in the measuring apparatus 1 of the present invention. As shown in the figure, the internal heat insulating structure of the measuring apparatus 1 according to the present invention further includes a first flexible body 50 and a second flexible body 60. Preferably, the first flexible body 50 and the second flexible body 60 are made of foam or rubber.

  More specifically, the first shielding wall 11 includes a first partition plate 11a provided in the first housing 10a and two first support plates 11b provided in the second housing 10b. One side of the first flexible body 50 is provided on the first partition plate 11a, and the opposite side of the first flexible body 50 is sandwiched between the two first support plates 11b.

  Further, the second shielding wall 12 includes two second support plates 12a provided in the first housing 10a and a second partition plate 12b provided in the second housing 10b. In addition, one side of the second flexible body 60 is provided on the second partition plate 12b, and the opposite side of the second flexible body 60 is sandwiched between the two second support plates 12a. .

  Specifically, the first shielding wall 11 and the second shielding wall 12 are each U-shaped. The first shielding wall 11 and the second shielding wall 12 surround the inner wall surface of the housing 10. Preferably, the said 1st shielding wall 11 is located inside the said 2nd shielding wall 12 at intervals in parallel.

  Thus, when the first housing 10a and the second housing 10b are assembled, the first partition plate 11a, the first support plate 11b, the first flexible body 50, the second support plate 12a, and the second partition plate 12b. And the second flexible body 60 is combined to realize a design for isolating the still air layer. Thereby, air in a stationary state is enclosed between the first shielding wall 11 and the second shielding wall 12 to form the air shielding layer 40. In addition, since the first shielding wall 11 is provided, the third space 103 does not communicate with the first space 101. Furthermore, since the second shielding wall 12 is provided, the third space 103 does not communicate with the second space 102.

  As described above, since the heat generated from the heat generating electronic element 22 is blocked by the air blocking layer 40 during the operation of the electronic module 20, it is not transmitted to the sensor element 30. In addition, the air blocking layer 40 can block the heated air from being transmitted to the sensor element 30 by convection, and the heat transfer from the heating element 22 to the sensor element 30 is also affected. Can be minimized.

  The above are only preferred embodiments of the present invention, and do not limit the scope of the claims of the present invention. In addition, any equivalent modifications based on the gist of the present invention belong to the claims of the present invention.

DESCRIPTION OF SYMBOLS 1 Measuring apparatus 10 Housing | casing 10a 1st housing | casing 10b 2nd housing | casing 100 Internal space 101 1st space 102 2nd space 103 3rd space 11 1st shielding wall 11a 1st partition plate 11b 1st support plate 111 Support rib 12 2nd shielding wall 12a 2nd support plate 12b 2nd partition plate 13 Heat radiation hole 20 Electronic module 21 Circuit board 22 Heating electronic element 30 Sensor element 40 Air shielding layer 50 1st flexible body 60 2nd flexible body

Claims (15)

An internal space, and a first shielding wall and a second shielding wall provided in the internal space, the first shielding wall and the second shielding wall comprising the internal space, the first space, the second space, and the A housing that is divided into a third space formed between the first shielding wall and the second shielding wall, and the third space does not communicate with the first space and the second space;
An electronic module disposed in the first space and including a circuit board and at least one heat generating electronic element combined with the circuit board;
A sensor element disposed in the second space and electrically connected to the circuit board, and located in the third space, blocks heat from the heat generating electronic element from being transmitted to the sensor element. An internal heat insulating structure of the measuring device including an air blocking layer.   The internal heat insulating structure of the measurement apparatus according to claim 1, wherein the housing includes a first housing and a second housing combined with each other.   The internal heat insulating structure of the measurement apparatus according to claim 2, wherein the first shielding wall includes a first partition plate provided in the first housing and two first support plates provided in the second housing.   The first flexible body further includes one side of the first flexible body provided on the first partition plate, and the opposite side of the first flexible body is sandwiched between the two first support plates. The internal heat insulation structure of the measuring apparatus according to claim 3.   The internal heat insulating structure of the measuring apparatus according to claim 4, wherein the first flexible body is made of foam or rubber.   The internal heat insulating structure of the measuring apparatus according to claim 2, wherein the second shielding wall includes two second support plates provided in the first housing and a second partition plate provided in the second housing.   A second flexible body is further included, and one side of the second flexible body is provided on the second partition plate, and the opposite side of the second flexible body is sandwiched between the two second support plates. The internal heat insulation structure of the measuring apparatus according to claim 6.   The internal heat insulating structure of the measuring apparatus according to claim 7, wherein the second flexible body is made of foam or rubber.   The internal heat insulation structure of the measuring apparatus according to claim 1, wherein each of the first shielding wall and the second shielding wall is U-shaped.   The internal heat insulating structure of the measuring apparatus according to claim 1, wherein the first shielding wall and the second shielding wall respectively surround an inner wall surface of the housing.   The internal heat insulation structure of the measuring apparatus according to claim 10, wherein the first shielding wall is positioned inside the second shielding wall with a space in parallel.   The internal heat insulating structure of the measuring apparatus according to claim 1, wherein a plurality of support ribs are provided on one side surface of the first shielding wall.   The measuring apparatus according to claim 1, wherein the housing is provided with a plurality of heat radiation holes, and the first space, the second space, and the third space communicate with the outside through the heat radiation holes, respectively. Internal heat insulation structure.   The internal heat insulating structure of the measuring apparatus according to claim 1, wherein the sensor element is a temperature sensor, and the temperature sensor is provided close to one side of the housing in the second space.   The internal heat insulating structure of the measuring apparatus according to claim 1, wherein the sensor element is provided close to one side of the housing in the second space.

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