Device for measuring air volume and air pressure of smoke exhaust ventilator

Abstract

An air volume and air pressure measuring device for a smoke exhaust ventilator comprises a measuring unit pipe body, an air volume adjusting module used for adjusting the air volume, a first air pressure measuring module used for measuring the working air pressure of the smoke exhaust ventilator, a second air pressure measuring module used for measuring the air pressure difference of the two sides of the air volume adjusting module, and a controller used for controlling the measuring device to work. The air volume adjusting module, the first air pressure measuring module and the second air pressure measuring module are all in circuit connection with the controller. The first wind pressure measuring module and the second wind pressure measuring module are arranged in the measuring unit pipe body, so that the measuring equipment can measure the wind pressure increment which can be provided by the range hood relative to the atmospheric pressure when the range hood works, and can measure the variation of the wind pressure under different wind volume resistances, thereby obtaining a performance curve of the range hood, and improving the performance of the range hood. The performance curve can accurately reflect the performance of the range hood.

Description

Technical Field

[0001] The utility model belongs to the technical field of range hood measurement equipment, and particularly relates to a range hood air volume and air pressure measurement equipment. Background Art

[0002] A range hood is a common kitchen appliance used to extract oil fumes and odors generated during cooking and keep the kitchen air clean. Its performance directly affects the indoor air quality and the comfort of the kitchen environment. In order to ensure the safety, effectiveness, and durability of the range hood, comprehensive detection is required, so a range hood measurement system is needed.

[0003] As shown in the Chinese patent application document with the patent application number 202210196736.5 in the prior art measurement system, it discloses an automatic test system for the performance of a range hood fan. The device mainly includes: a remote control electric valve device, a filter amplifier, a threshold comparison circuit, an air velocity sensor, a temperature sensor, and a pressure gauge. The method adopts a new measurement and control algorithm, which can measure the air velocity and pressure, detect and compensate the original measured flow value, adopt relevant algorithms such as filtering for the sensor signals collected, calculate relevant values, and then calculate the fan performance under different working conditions according to the air velocity, temperature measured by the sensor, and pipeline parameters.

[0004] In the test system of the above patent application, the pressure value inside the test pipe section is measured by a pressure gauge, and at the same time, the atmospheric pressure value is measured by setting an atmospheric pressure gauge outside the test pipe section. The two are compared to obtain the increment of the air pressure of the range hood. The air volume and air pressure curve obtained in this way is affected by the change factor of the atmospheric pressure value, and there is a certain error. Moreover, this error value is affected by the environment and is uncontrollable. Therefore, when the measurement unit conducts the performance test of the range hood through this measurement system, it cannot control the measurement accuracy and it is difficult to form a measurement standard. Summary of the Utility Model

[0005] In order to overcome the deficiencies of the prior art, the utility model provides a range hood air volume and air pressure measurement equipment.

[0006] The technical solution adopted by the utility model to solve its technical problems is:

[0007] An air volume and air pressure measurement device for a range hood, comprising a measuring unit pipe body, an air volume adjustment module for adjusting the air volume, a first air pressure measurement module for measuring the working air pressure of the range hood, a second air pressure measurement module for measuring the air pressure difference on both sides of the air volume adjustment module, and a controller for controlling the operation of the measurement device. The air volume adjustment module, the first air pressure measurement module, and the second air pressure measurement module are all connected to the controller circuit. The measuring unit pipe body includes a range hood flange connecting plate, a front measuring pipe body, a rear measuring pipe body, and an exhaust pipe connecting section that are connected in sequence. The first air pressure measurement module is arranged on the outside of the front measuring pipe body and is communicated with the inside of the front measuring pipe body. The air volume adjustment module is arranged between the front measuring pipe body and the rear measuring pipe body. The second air pressure measurement module has two air pressure measurement points, which are respectively arranged on both sides of the air volume adjustment module.

[0008] In the present utility model, the first air pressure measurement module includes a first pressure-taking air pipe, which is arranged around the outside of the front measuring pipe body and is close to one end of the range hood flange connecting plate. The first pressure-taking air pipe is communicated with the inside of the front measuring pipe body.

[0009] In the present utility model, the controller is electrically connected to two pressure sensors. One of the pressure sensors is arranged inside the first pressure-taking air pipe for collecting the air pressure value of the first pressure-taking air pipe. The other pressure sensor is exposed to the external air for collecting the atmospheric pressure value.

[0010] In the present utility model, the second air pressure measurement module includes a second pressure-taking air pipe and a third pressure-taking air pipe. The second pressure-taking air pipe is arranged around the outside of the front measuring pipe body and is close to one end of the air volume adjustment module. The third pressure-taking air pipe is arranged around the outside of the rear measuring pipe body and is close to one end of the air volume adjustment module. The second pressure-taking air pipe and the third pressure-taking air pipe are respectively communicated with the front measuring pipe body and the rear measuring pipe body.

[0011] In the present utility model, the two air pressure measurement points of the second air pressure measurement module are respectively arranged inside the second pressure-taking air pipe and the third pressure-taking air pipe, for respectively collecting the air pressure values inside the second pressure-taking air pipe and the third pressure-taking air pipe, and transmitting them to the controller.

[0012] In the present utility model, several supporting feet are provided at the bottom of the measuring unit pipe body, and the several supporting feet are arranged at intervals along the axial direction of the measuring unit pipe body.

[0013] In the present utility model, the top of the supporting foot is an arc-shaped structure that fits the outer wall of the measuring unit pipe body. The bottom of the supporting foot is a supporting plate surface that is bent along the horizontal plane. A vertical supporting plate surface is provided between the arc-shaped structure and the supporting plate surface.

[0014] In the present utility model, a storage platform is fixedly provided at the top of the tube body of the measuring unit.

[0015] In the present utility model, the storage platform includes a storage board surface and several support frames. The several support frames are arranged at intervals along the axial direction of the tube body of the measuring unit. The bottom of the support frame is fixedly connected to the outer wall of the top of the tube body of the measuring unit, and the top of the support frame is fixedly connected to the bottom of the storage board surface.

[0016] The beneficial effects of the present utility model are as follows: By arranging a first wind pressure measuring module and a second wind pressure measuring module in the tube body of the measuring unit, the measuring device can measure the wind pressure increment that the range hood can provide relative to the atmospheric pressure during operation, and at the same time can measure the change in wind pressure under different air volume resistances, so as to obtain the performance curve of the range hood. This performance curve can accurately reflect the performance of the range hood and is not affected by the atmospheric pressure in the air. The influence of different air volume resistances on the performance of the range hood can be calculated through the wind pressure difference on both sides of the air volume adjustment module, and the performance curve of the range hood can be obtained more accurately. Moreover, this test method can realize standardized testing, which is convenient for different testing units to use the same standard for comparison. Description of the Drawings

[0017] Figure 1 It is the circuit connection schematic diagram of the controller of this embodiment;

[0018] Figure 2 It is the structural schematic diagram of the measuring device of this embodiment;

[0019] Figure 3 It is the structural schematic diagram of the tube body of the measuring unit of this embodiment;

[0020] Figure 4 It is the structural schematic diagram of the support foot plate of this embodiment. Detailed Embodiment

[0021] To make the objectives, technical solutions, and advantages of the embodiments of the present utility model clearer, the technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model.

[0022] It should be noted that if there are directional indications (such as up, down, left, right, front, back, top, bottom, inside, outside, vertical, horizontal, longitudinal, counterclockwise, clockwise, circumferential, radial, axial...) involved in the embodiments of the present utility model, then the directional indications are only used to explain the relative positional relationship and movement conditions between components in a certain specific posture (as shown in the drawings). If this specific posture changes, then the directional indications will also change accordingly.

[0023] In addition, if the description of "first" or "second" etc. is involved in the embodiments of the present utility model, such description of "first" or "second" etc. is only for descriptive purposes and cannot be construed as indicating or implying its relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions between various embodiments can be combined with each other, but it must be based on the fact that those of ordinary skill in the art can implement it. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the protection scope required by the present utility model.

[0024] As Figures 1 to 4 shown, this embodiment discloses an air volume and air pressure measurement device for a range hood, including a measurement unit pipe body 1, an air volume adjustment module 2 for adjusting the air volume size, a first air pressure measurement module 3 for measuring the working air pressure of the range hood, a second air pressure measurement module 4 for measuring the air pressure difference on both sides of the air volume adjustment module 2, and a controller 5 for controlling the operation of the measurement device. The air volume adjustment module 2, the first air pressure measurement module 3, and the second air pressure measurement module 4 are all electrically connected to the controller 5; the measurement unit pipe body 1 includes a range hood flange connecting plate 11, a front measurement pipe body 12, a rear measurement pipe body 13, and an exhaust pipe connection section 14 that are connected in sequence. The range hood flange connecting plate 11 is used to connect the range hood to be measured, and the exhaust pipe connection section 14 is used to sleeve the exhaust pipe; the first air pressure measurement module 3 is arranged outside the front measurement pipe body 12 and is communicated with the inside of the front measurement pipe body 12; the air volume adjustment module 2 is arranged between the front measurement pipe body 12 and the rear measurement pipe body 13. The second air pressure measurement module 4 is provided with two air pressure measurement points, which are respectively arranged on both sides of the air volume adjustment module 2 to measure the pressure difference of the gas after passing through the air volume adjustment module 2, so as to calculate the change in the air pressure performance of the range hood under different resistance conditions controlled by the air volume adjustment module 2. In this embodiment, by arranging the first air pressure measurement module 3 and the second air pressure measurement module 4 in the measurement unit pipe body 1, the measurement device can measure the air pressure increment that the range hood can provide relative to the atmospheric pressure during operation, and at the same time can measure the change in air pressure under different air volume resistances, so as to obtain the performance curve of the range hood. This performance curve can accurately reflect the performance of the range hood and is not affected by the atmospheric pressure in the air. The influence of different air volume resistances on the performance of the range hood can be calculated through the air pressure difference on both sides of the air volume adjustment module 2. The performance curve of the range hood can be obtained more accurately, and this test method can achieve standardized testing, which is convenient for different testing units to use the same standard for comparison.

[0025] In this embodiment, the first air pressure measurement module 3 includes a first pressure-taking air pipe 31. The first pressure-taking air pipe 31 is disposed around the outer side of the front measurement pipe body 12 and near one end of the range hood flange connection plate 11. The first pressure-taking air pipe 31 is communicated with the inside of the front measurement pipe body 12. The controller 5 is electrically connected to two pressure sensors. One of the pressure sensors is disposed inside the first pressure-taking air pipe 31 for collecting the air pressure value of the first pressure-taking air pipe 31. The other pressure sensor is exposed to the external air for collecting the atmospheric pressure value. By comparing the air pressure value of the first pressure-taking air pipe 31 with the atmospheric pressure value, the air pressure increment that the range hood can provide relative to the atmospheric pressure during operation can be calculated.

[0026] In this embodiment, the second air pressure measurement module 4 includes a second pressure-taking air pipe 41 and a third pressure-taking air pipe 42. The second pressure-taking air pipe 41 is disposed around the outer side of the front measurement pipe body 12 and near one end of the air volume adjustment module 2. The third pressure-taking air pipe 42 is disposed around the outer side of the rear measurement pipe body 13 and near one end of the air volume adjustment module 2. The second pressure-taking air pipe 41 and the third pressure-taking air pipe 42 are respectively communicated with the front measurement pipe body 12 and the rear measurement pipe body 13. Two air pressure measurement points of the second air pressure measurement module 4 are respectively disposed inside the second pressure-taking air pipe 41 and the third pressure-taking air pipe 42, so as to respectively collect the air pressure values inside the second pressure-taking air pipe 41 and the third pressure-taking air pipe 42 and transmit them to the controller 5. By calculation, it can be known that under different resistance conditions of the range hood, the air pressure performance change curve thereof.

[0027] In this embodiment, in order to facilitate the installation and fixation of the measurement unit pipe body 1, a plurality of support feet 6 are provided at the bottom of the measurement unit pipe body 1. The plurality of support feet 6 are arranged at intervals along the axial direction of the measurement unit pipe body 1. The top of the support foot 6 is an arc-shaped structure 61 that fits the outer side wall of the measurement unit pipe body 1. The bottom of the support foot 6 is a support plate surface 62 bent along the horizontal plane. A vertical support plate surface 63 is provided between the arc-shaped structure 61 and the support plate surface 62. By providing the support feet 6, the measurement unit pipe body 1 can be stably installed on the chassis or the ground, so as to ensure the stability of the data during measurement of the air volume device, and further ensure the accuracy of the measurement data of the range hood.

[0028] In this embodiment, in order to further optimize the space utilization at the top of the measuring unit tube body 1, a storage platform 7 is fixedly provided at the top of the measuring unit tube body 1. Instruments required for measurement or products to be tested can be placed on the storage platform 7, which is convenient for observing test data or conducting product tests. The storage platform 7 includes a storage board surface 71 and several support frames 72. The several support frames 72 are arranged at intervals along the axial direction of the measuring unit tube body 1. The bottom of the support frame 72 is fixedly connected to the outer wall of the top of the measuring unit tube body 1, and the top of the support frame 72 is fixedly connected to the bottom of the storage board surface 71. For the convenience of processing, the structure of the support frame 72 is the same as that of the supporting foot plate 6, and only needs to be installed and fixed relatively up and down during installation, so as to reduce the installation difficulty of the measuring device.

[0029] The above are only the preferred embodiments of the present invention. As long as the technical solutions that achieve the purpose of the present invention by basically the same means fall within the protection scope of the present invention.

Claims

1. An air volume and air pressure measuring device for a range hood, characterized in that: It includes a measuring unit pipe body (1), an air volume regulating module (2) for regulating the air volume, a first wind pressure measuring module (3) for measuring the working wind pressure of the range hood, a second wind pressure measuring module (4) for measuring the wind pressure difference on both sides of the air volume regulating module (2), and a controller (5) for controlling the operation of the measuring device. The air volume regulating module (2), the first wind pressure measuring module (3), and the second wind pressure measuring module (4) are all electrically connected to the controller (5). The measuring unit pipe body (1) includes a range hood flange connecting plate (11), a front measuring pipe body (12), a rear measuring pipe body (13), and an exhaust pipe connecting section (14) that are connected in sequence. The first wind pressure measuring module (3) is arranged outside the front measuring pipe body (12) and is internally connected to the front measuring pipe body (12). The air volume regulating module (2) is arranged between the front measuring pipe body (12) and the rear measuring pipe body (13). The second wind pressure measuring module (4) has two wind pressure measuring points, and the two wind pressure measuring points are respectively arranged on both sides of the air volume regulating module (2).

2. The air volume and air pressure measuring device for a range hood according to claim 1, characterized in that: The first wind pressure measuring module (3) includes a first pressure-taking air pipe (31). The first pressure-taking air pipe (31) is arranged around the outside of the front measuring pipe body (12) and near one end of the range hood flange connecting plate (11). The first pressure-taking air pipe (31) is internally connected to the front measuring pipe body (12).

3. The air volume and air pressure measuring device for a range hood according to claim 2, characterized in that: The controller (5) is electrically connected to two pressure sensors. One of the pressure sensors is arranged inside the first pressure-taking air pipe (31) for collecting the air pressure value of the first pressure-taking air pipe (31). The other pressure sensor is exposed to the outside air for collecting the atmospheric pressure value.

4. The air volume and air pressure measuring device for a range hood according to claim 1, wherein: The second wind pressure measuring module (4) includes a second pressure-taking air pipe (41) and a third pressure-taking air pipe (42). The second pressure-taking air pipe (41) is arranged around the outside of the front measuring pipe body (12) and near one end of the air volume regulating module (2). The third pressure-taking air pipe (42) is arranged around the outside of the rear measuring pipe body (13) and near one end of the air volume regulating module (2). The second pressure-taking air pipe (41) and the third pressure-taking air pipe (42) are respectively connected to the front measuring pipe body (12) and the rear measuring pipe body (13).

5. The air volume and air pressure measuring device for a range hood according to claim 4, characterized in that: The two wind pressure measuring points of the second wind pressure measuring module (4) are respectively arranged inside the second pressure-taking air pipe (41) and the third pressure-taking air pipe (42), respectively collecting the wind pressure values inside the second pressure-taking air pipe (41) and the third pressure-taking air pipe (42), and transmitting them to the controller (5).

6. The air volume and air pressure measuring device for a range hood according to claim 1, characterized in that: Several supporting feet plates (6) are arranged at the bottom of the measuring unit pipe body (1). The several supporting feet plates (6) are arranged at intervals along the axial direction of the measuring unit pipe body (1).

7. An air volume and air pressure measuring device for a range hood according to claim 6, characterized in that: The top of the supporting feet plate (6) is an arc-shaped structure (61) that fits the outer wall of the measuring unit pipe body (1). The bottom of the supporting feet plate (6) is a supporting plate surface (62) bent along the horizontal plane. There is a vertically arranged supporting plate surface (63) between the arc-shaped structure (61) and the supporting plate surface (62).

8. The air volume and air pressure measuring device for a range hood according to claim 1, characterized in that: A storage platform (7) is fixedly arranged at the top of the measuring unit pipe body (1).

9. The air volume and air pressure measuring device for a range hood according to claim 8, wherein: The storage platform (7) includes a storage board surface (71) and a plurality of support frames (72). The plurality of support frames (72) are arranged at intervals along the axial direction of the measuring unit tube body (1). The bottom of the support frame (72) is fixed to the outer wall of the top of the measuring unit tube body (1), and the top of the support frame (72) is fixed to the bottom of the storage board surface (71).

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