CN212158880U - Device for measuring heat productivity of indoor equipment - Google Patents
Device for measuring heat productivity of indoor equipment Download PDFInfo
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- CN212158880U CN212158880U CN202021204873.1U CN202021204873U CN212158880U CN 212158880 U CN212158880 U CN 212158880U CN 202021204873 U CN202021204873 U CN 202021204873U CN 212158880 U CN212158880 U CN 212158880U
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Abstract
The utility model provides a device for measuring indoor set calorific capacity, include: the measuring box body is a hollow shell, and the surface of the measuring box body is provided with an air supply outlet and an air exhaust outlet; the temperature sensor vertically penetrates through the surface of the measuring box body; the temperature sensor comprises a temperature probe, and the temperature probe is positioned in the measuring box body and used for measuring the internal temperature of the measuring box body; the temperature dial is positioned outside the measuring box body and used for displaying the temperature inside the measuring box body; and the heat conducting piece is used for conducting the measured temperature of the temperature probe to the temperature dial for display. Based on the CRI, the product device can measure the calorific value of the indoor equipment accurately and has certain effectiveness. The depth of the probe of the temperature sensor in the product device, which penetrates into the box body, is adjustable, and the probe of the temperature sensor can be adjusted according to different sizes of equipment to be measured in order to ensure the measurement precision. The temperature sensor line is marked with scales, so that the positioning is convenient.
Description
Technical Field
The utility model relates to a temperature measuring device technical field, in particular to a device for measuring indoor set calorific capacity.
Background
With the continuous development of science and technology, various indoor electric appliances have become the main tools of people's life and work, such as computers, projectors, printers, various household appliances, and the like. The heating of the electrical equipment has certain influence on the indoor thermal environment while the working and life quality is improved. Usually, such electrical devices will indicate their operating power, but there are few records about their exact heating value. When analyzing the indoor thermal environment and predicting the thermal load, the calorific values of various devices are generally averaged or simply estimated in terms of unit area. However, under the trend of accurate control of indoor environment, it becomes a necessary link to accurately grasp the accurate heat productivity of each equipment and process the equipment.
Therefore, in order to improve the accuracy of analysis and prediction of the indoor thermal environment, it is necessary to solve the problem of measuring the calorific value of the equipment. However, the measurement of the heat generation amount of the device is very difficult, and an environmental chamber capable of accurately controlling the temperature and humidity is often required, and complicated processing such as sealing of the heat generation device is required. At present, no device which has high accuracy and can measure or calculate the heat productivity of indoor equipment more conveniently exists.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a device for measuring indoor set calorific capacity solves the problem that indoor set calorific capacity measured the difficulty. The actual heat productivity of the indoor equipment is measured, and the analysis and prediction precision of the indoor thermal environment is improved.
In order to solve the technical problem, the utility model provides a device for measuring indoor set calorific capacity, include:
the device comprises a measuring box body, a control device and a control device, wherein the measuring box body is a hollow shell, and measured equipment is placed in the measuring box body; and
the temperature sensor vertically penetrates through the surface of the measuring box body to have a certain distance from the surface of the measured equipment;
the temperature sensor comprises a temperature probe, the temperature probe is positioned in the measuring box body and is used for measuring the temperature in the measuring box body and calculating the measured temperature to obtain the heat productivity of the measured equipment;
the temperature dial is positioned outside the measuring box body and used for displaying the temperature inside the measuring box body; and
and one end of the heat conducting piece is connected with the temperature probe in a heat conducting manner, and the other end of the heat conducting piece is connected with the temperature dial in a heat conducting manner and used for conducting the measured temperature of the temperature probe to the temperature dial for displaying.
Further, the temperature sensor is connected with the measuring box body in a sliding mode, so that the temperature sensor can move along the surface of the measuring box body.
Furthermore, the heat conducting piece is provided with scale marks which can go deep into the measuring box body.
Furthermore, the number of the temperature sensors is more than or equal to 1, and each temperature sensor vertically penetrates through the surface of the measuring box body to have a certain distance from the surface of the measured equipment.
Furthermore, the measuring box body is of a cube structure, and a temperature sensor transversely penetrates through the measuring box body along the central position of the surface of the measuring box body.
Furthermore, the surface of the measuring box body is provided with an air supply outlet and an air outlet, and the air supply outlet and the air outlet are arranged in equal sizes.
Furthermore, the air supply temperature at the air supply port is the temperature of the constant temperature environment in which the measuring box is arranged.
Furthermore, holes are formed in the surface of the measuring box body respectively and used for enabling the temperature sensor to penetrate through the surface of the measuring box body.
Has the advantages that:
1. based on the CRI, the product device can measure the calorific value of the indoor equipment accurately and has certain effectiveness.
2. The depth of the probe of the temperature sensor in the product device, which penetrates into the box body, is adjustable, and the probe of the temperature sensor can be adjusted according to different sizes of equipment to be measured in order to ensure the measurement precision.
3. The temperature sensor line is marked with scales, so that the positioning is convenient.
Drawings
Fig. 1 is a schematic structural diagram of the device for measuring the heat productivity of indoor equipment according to the present invention;
fig. 2 is a schematic structural diagram of the temperature sensor of the present invention.
Legend: 1. a measuring box body; 11. an air supply outlet; 12. an air outlet; 13. an aperture; 2. a temperature sensor; 21. a temperature probe; 22. a temperature dial; 23. a heat conductive member; 2-1. a first temperature sensor; 2-2. a second temperature sensor; 2-3. a third temperature sensor; 2-4. a fourth temperature sensor; 2-5. a fifth temperature sensor; 3. a measured device.
Detailed Description
The embodiments of the present disclosure are described in detail below with reference to the accompanying drawings.
The embodiments of the present disclosure are described below with specific examples, and other advantages and effects of the present disclosure will be readily apparent to those skilled in the art from the disclosure in the specification. It is to be understood that the described embodiments are merely illustrative of some, and not restrictive, of the embodiments of the disclosure. The disclosure may be embodied or carried out in various other specific embodiments, and various modifications and changes may be made in the details within the description without departing from the spirit of the disclosure. It is to be noted that the features in the following embodiments and examples may be combined with each other without conflict. All other embodiments, which can be derived by a person skilled in the art from the embodiments disclosed herein without making any creative effort, shall fall within the protection scope of the present disclosure.
As shown in fig. 1 and 2, the utility model discloses a device for measuring calorific capacity of indoor unit, include: a measuring box 1, a temperature sensor 2 and a measured device 3.
The measuring box body 1 is a hollow shell, the top cover and the side wall of the measuring box body 1 can be opened and/or closed and connected, the measured equipment 3 is placed at the center of the bottom in the measuring box body 1 by opening the top cover of the measuring box body 1, and the surface of the measuring box body 1 is provided with an air supply opening 11 and an air exhaust opening 12. The temperature of the air supplied to the air supply port 11 is the temperature of the constant temperature environment in which the measurement case 1 is placed.
The surface of the measuring box body 1 is respectively provided with a hole 13. The temperature sensor 2 vertically penetrates through the surface of the measuring box 1 to a certain distance from the surface of the measured equipment 3 through a hole 13.
The temperature sensor 2 includes a temperature probe 21, a temperature dial 22, and a heat conductive member 23.
The temperature probe 21 is located inside the measurement box 1, and is used for measuring the temperature inside the measurement box 1, and calculating the measured temperature to obtain the heat productivity of the measured device 3.
A temperature dial 22 is located outside the measurement housing 1 for displaying the temperature inside the measurement housing 1.
The heat conducting piece 23 is connected with the temperature probe 21 at one end in a heat conducting manner, and is connected with the temperature dial 22 at the other end in a heat conducting manner, and is used for conducting the measured temperature of the temperature probe 21 to the temperature dial 22 for displaying.
The temperature sensor 2 is slidably connected to the measurement housing 1 such that the temperature sensor 2 can move along the surface of the measurement housing 1. When the temperature probe 21 of the temperature sensor 2 goes deep into the measuring box 1, the position of the temperature probe 21 is adjusted according to different sizes of the measured equipment 3, and the measuring precision is ensured by adjusting the position of the temperature probe 21.
The heat conducting member 23 is provided with scale marks which can penetrate into the measuring box 1. The distance from the temperature probe 21 to the measured equipment 3 can be accurately mastered through the scale layer, and the positioning is convenient.
The number of the temperature sensors 2 is more than or equal to 1, and each temperature sensor 2 vertically penetrates through the surface of the measuring box body 1 to have a certain distance from the surface of the measured equipment 3.
When the measuring box body 1 is of a cube structure, the number of the temperature sensors 2 is 5, the temperature sensors are respectively a first temperature sensor 2-1, a second temperature sensor 2-2, a third temperature sensor 2-3, a fourth temperature sensor 2-4 and a fifth temperature sensor 2-5, and the temperature sensors 2 transversely penetrate through the central position of the surface of the measuring box body 1. In the embodiment, the length, width and height of the measurement box 1 are respectively 1m, 1m and 1m, the box is made of heat-insulating aluminum alloy materials, holes 13 are formed in the positions, which are 0.25m away from the bottom and are equidistant from the left side and the right side, of each surface of the measurement box 1 except the bottom surface, and a temperature sensor 2 which is composed of a temperature dial 22, a temperature probe 21 and a heat conducting piece 23 with the length of 0.5m is just vertically arranged on the surface in a penetrating mode. The above parameters are set in order to obtain accurate device heating value.
The air supply opening 11 and the air exhaust opening 12 are arranged in equal size. The dimensions of the air supply opening 11 and the air discharge opening 12 in this embodiment are 0.2m long and 0.1m wide, respectively.
The technical scheme of measuring the calorific value of the Indoor equipment is mainly that a small-sized thermal environment is constructed by using the product device on the basis of the contribution Ratio CRI (contribution Ratio of index) of the Indoor environment, the required equipment to be measured 3 is placed in the thermal environment, and the actual calorific value of the equipment is measured through sensor data and CRI.
For a forced convection dominant flow field, the thermal factor m is at xiThe CRI calculation for a point is as follows:
wherein
xiSpace coordinate
θn: neutral temperature, i.e. indoor design temperature
θm,o: heat factor m heat dissipation (or heat absorption) QmRoom temperature at uniform diffusion
Δθm,o＝θm,o-θn: temperature difference between uniform diffusion temperature and neutral temperature
θm(xi): heat factor m heat dissipation (or heat absorption) Q obtained by CFD calculationmRear xiPoint temperature
Δθm(xi)＝θm(xi)-θn: heat factor m heat dissipation (or heat absorption) QmRear xiTemperature difference between point temperature and neutral temperature
Cp: specific heat capacity of indoor air
ρ: density of air
F: air delivery
The specific implementation mode is as follows:
the accurate heat generation amount of one device placed in a room is 500W, and the heat generation amount is estimated to be between 480W and 550W according to the indicated device power. The box body is placed in a constant temperature environment, the temperature is 22 ℃, and the internal temperature of the box body, namely the neutral temperature, is 27 ℃.
Assuming that the device heating value is 480W, the CFD simulation calculation conditions are shown in table 1.
TABLE 1 calculation of simulation conditions
At this time, the total temperature at each monitoring point in the total temperature field and the temperature difference between each thermal factor and the neutral temperature are shown in table 2, the temperature of each point under the control of only the device heating value can be obtained according to the linear characteristic of the temperature field, and the CRI of each monitoring point can be calculated by substituting the temperature into formula (1), and is summarized in table 2.
TABLE 2 temperature rise (simulation) of each thermal factor to each monitoring point
In practice, the total temperature at each monitoring point inside the box and the temperature difference between each thermal factor and the neutral temperature are measured as shown in table 3, the air supply temperature is still 22 ℃ of the constant temperature environment, the temperature of each point under the control of the equipment heating value can be obtained according to the linear characteristic of the temperature field, the temperature and the known CRI of each point are substituted into the formula (1), the actual heating value of the equipment is obtained through calculation, and the actual heating value is summarized in table 3.
| Total temperature | Air supply | Wall surface | CRI | Device | Q | |
| S1 | 7.96 | -5 | -1.29 | -0.44 | 14.25 | 495.74 |
| S2 | 9.47 | -5 | -1.42 | -0.48 | 15.89 | 495.60 |
| S3 | 3.63 | -5 | -1.18 | -0.40 | 9.81 | 499.90 |
| S4 | 4.82 | -5 | -1.42 | -0.48 | 11.24 | 495.93 |
| S5 | 3.79 | -5 | -1.43 | -0.49 | 10.22 | 499.68 |
TABLE 3 temperature rise (actual) of each thermal factor to each monitoring point
According to the calculation results, the calculated heating value is very close to the actual heating value, and the calculation results can be applied within the error allowable range, namely, the method for reversely calculating the heating value of the equipment by utilizing the product device based on the CRI has certain effectiveness, and the accurate equipment heating value can be basically obtained.
The above description is for illustrative purposes only and is not intended to limit the present invention, and any modifications, equivalent substitutions, improvements, etc. that do not depart from the spirit and principles of the present invention should be construed as within the scope of the present invention.
Claims (8)
1. An apparatus for measuring a heat generation amount of an indoor device, comprising:
the device comprises a measuring box body (1), wherein the measuring box body (1) is a hollow shell, and a measured device (3) is placed in the measuring box body (1); and
the temperature sensor (2) vertically penetrates through the surface of the measuring box body (1) and has a certain distance to the surface of the measured equipment (3);
the temperature sensor (2) comprises a temperature probe (21), the temperature probe (21) is positioned in the measuring box body (1) and is used for measuring the internal temperature of the measuring box body (1), and the measured temperature is calculated to obtain the heat productivity of the measured equipment (3);
the temperature dial plate (22), the temperature dial plate (22) is located outside the measuring box body (1) and is used for displaying the temperature inside the measuring box body (1); and
the temperature measuring device comprises a heat conducting piece (23), wherein one end of the heat conducting piece (23) is connected with the temperature probe (21) in a heat conducting mode, the other end of the heat conducting piece (23) is connected with the temperature dial (22) in a heat conducting mode, and the heat conducting piece is used for conducting the measured temperature of the temperature probe (21) to the temperature dial (22) to be displayed.
2. The device for measuring heat generation of indoor units according to claim 1, wherein the temperature sensor (2) is slidably connected to the measuring box (1) such that the temperature sensor (2) is movable along the surface of the measuring box (1).
3. The apparatus for measuring the heating value of indoor units according to claim 1, wherein the heat conducting member (23) is provided with graduation marks which can be deeply inserted into the measuring box (1).
4. The device for measuring the heat productivity of indoor units as claimed in claim 1, wherein the number of the temperature sensors (2) is more than or equal to 1, and each temperature sensor (2) vertically penetrates through the surface of the measuring box body (1) to have a certain distance to the surface of the measured equipment (3).
5. The apparatus for measuring heat generation amount of indoor unit according to claim 1, wherein the measuring box (1) is a cube structure, and the temperature sensor (2) is transversely penetrated along the center position of the surface of the measuring box (1).
6. The device for measuring the heat productivity of indoor units as claimed in claim 1, wherein the measuring box (1) is provided with an air supply outlet (11) and an air exhaust outlet (12) on the surface, and the air supply outlet (11) and the air exhaust outlet (12) are arranged in equal size.
7. The device for measuring the heat generation amount of indoor equipment according to claim 6, wherein the temperature of the air supplied at the air supply outlet (11) is the temperature of the constant temperature environment in which the measurement case (1) is placed.
8. The device for measuring the heat productivity of indoor units as claimed in claim 1, wherein the measuring box (1) is provided with holes (13) on the surface, and the holes (13) are used for allowing the temperature sensor (2) to penetrate through the surface of the measuring box (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021204873.1U CN212158880U (en) | 2020-06-28 | 2020-06-28 | Device for measuring heat productivity of indoor equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021204873.1U CN212158880U (en) | 2020-06-28 | 2020-06-28 | Device for measuring heat productivity of indoor equipment |
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| Publication Number | Publication Date |
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| CN212158880U true CN212158880U (en) | 2020-12-15 |
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| CN202021204873.1U Active CN212158880U (en) | 2020-06-28 | 2020-06-28 | Device for measuring heat productivity of indoor equipment |
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| CN (1) | CN212158880U (en) |
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