Air volume device of range hood measuring system

Abstract

An air volume device of a range hood measuring system comprises a measuring unit pipe body, an air volume adjusting module used for adjusting the air volume and a controller used for controlling the air volume adjusting module to work, and one end of the measuring unit pipe body is provided with an air inlet used for being connected with a range hood to be measured. The other end of the measuring unit pipe body is provided with an air outlet used for being connected with an exhaust fan. The measuring unit pipe body is internally provided with a measuring air channel communicated with the air inlet and the air outlet. The air volume adjusting module covering the cross section of the measuring air duct is arranged in the measuring unit pipe body, and the air volume adjusting module is provided with at least three adjusting nozzles with different opening degree adjusting ranges and unit opening degree adjusting quantities, so that the opening degree of the air duct can be adjusted by superposing the air volumes of the different adjusting nozzles; and wide-range opening adjustment is realized without depending on one adjusting nozzle, so that the accuracy of measured data is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of range hood measurement systems, and particularly relates to an air volume device for a range hood measurement system. Background Technique

[0002] A range hood is a common kitchen appliance used to extract cooking fumes and odors, keeping the kitchen air clean. Its performance directly affects the indoor air quality and the comfort of the kitchen environment. To ensure the safety, effectiveness, and durability of the range hood, comprehensive testing 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 uses a new measurement and control algorithm to measure the air velocity and pressure, detect and compensate the original measured flow value; uses relevant algorithms such as filtering for the sensor signals collected, calculates relevant values, and then calculates the fan performance under different working conditions according to the air velocity, temperature, and pipeline parameters measured by the sensors.

[0004] In the test system of the above patent application, the air volume is adjusted by a remote control electric valve device. However, since the air volume adjustment range during range hood measurement is relatively large, the error in adjusting the air volume by the remote control electric valve device is often relatively large, and the accuracy of the measurement data is not high. Therefore, a device capable of accurately adjusting the air volume needs to be configured for the range hood measurement system. Summary of the Utility Model

[0005] In order to overcome the deficiencies of the prior art, the utility model provides an air volume device for a range hood measurement system.

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

[0007] An air volume device of an oil fume extractor measurement system, comprising a measurement unit pipe body, an air volume adjustment module for adjusting the air volume, and a controller for controlling the operation of the air volume adjustment module. One end of the measurement unit pipe body is provided with an air inlet for connecting the oil fume extractor to be measured, and the other end is provided with an air outlet for connecting an exhaust fan. A measurement air duct communicating the air inlet and the air outlet is provided inside the measurement unit pipe body; the air volume adjustment module is installed inside the measurement unit pipe body, and the air volume adjustment module covers the cross-section of the measurement air duct; the air volume adjustment module includes at least three adjustment nozzles, and the opening adjustment ranges and unit opening adjustment amounts of each adjustment nozzle are different. The total opening of the air volume adjustment module is equal to the sum of the openings of each adjustment nozzle.

[0008] In the present utility model, the air volume adjustment module includes at least one adjustment nozzle with an opening adjustment range of 0 - 10 cm 2 and a unit opening adjustment amount of 1 cm 2 , one adjustment nozzle with an opening adjustment range of 0 - 100 cm 2 and a unit opening adjustment amount of 10 cm 2 , and one adjustment nozzle with an opening adjustment range of 0 - 1000 cm 2 and a unit opening adjustment amount of 100 cm 2 .

[0009] In the present utility model, the adjustment nozzle includes an air inlet flare, an air outlet cylinder, and an adjustment push rod. The air inlet flare is connected to one end of the air outlet cylinder. An inner cavity for gas to flow through is provided inside the air outlet cylinder. A plurality of groups of ventilation holes for gas to flow out are provided on the outer wall of the air outlet cylinder, and each group of ventilation holes is arranged at intervals along the axial direction of the air outlet cylinder. One end of the adjustment push rod is provided with a piston, the piston is arranged inside the inner cavity, and the outer side wall of the piston is closely attached to the inner wall of the air outlet cylinder. The other end of the adjustment push rod extends along the axial direction of the air outlet cylinder and extends out from the other end of the air outlet cylinder. A connection block for connecting an adjustment driving mechanism is provided at the other end of the adjustment push rod, and the adjustment push rod drives the connection block to move axially through the adjustment driving mechanism.

[0010] In the present utility model, there are 10 groups of the ventilation holes, and each group of ventilation holes corresponds to 1 unit opening adjustment amount in the adjustment nozzle.

[0011] In the present utility model, an observation window is provided on the side wall of the measurement unit pipe body. The observation window communicates with the measurement air duct, and the position of the observation window is the same as that of the air volume adjustment module.

[0012] In the present utility model, at least three scale bars are further provided inside the measurement unit pipe body. Each adjustment nozzle is provided with one scale bar, and the scale bar extends along the moving direction of the adjustment push rod.

[0013] In the present utility model, a pointer pointing to the scale bar is provided on the outer side wall of the connecting block.

[0014] In the present utility model, a wind speed sensor is provided at one end of the air outlet cylinder connecting to the air inlet expansion opening, and both the adjusting nozzle and the wind speed sensor are electrically connected to the controller through a circuit.

[0015] In the present utility model, a plurality of supporting foot plates are provided at the bottom of the measuring unit pipe body, and the plurality of supporting foot plates are arranged at intervals along the axial direction of the measuring unit pipe body.

[0016] In the present utility model, the top of the supporting foot plate is an arc-shaped structure that fits the outer side wall of the measuring unit pipe body, the bottom of the supporting foot plate is a supporting plate surface bent along the horizontal plane, and a vertical supporting plate surface is provided between the arc-shaped structure and the supporting plate surface.

[0017] The beneficial effects of the present utility model are as follows: By arranging an air volume adjustment module covering the cross-section of the measuring air duct inside the measuring unit pipe body, and at the same time, the air volume adjustment module is provided with at least three adjusting nozzles with different opening adjustment ranges and unit opening adjustment amounts, so that the opening adjustment of the air duct can be achieved by superimposing the air volumes of different adjusting nozzles, without relying on a single adjusting nozzle to achieve a large range of opening adjustment, thereby improving the accuracy of the measurement data. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall structure of the air volume device in this embodiment;

[0019] Figure 2 It is a schematic diagram of the structure of the air volume adjustment module in this embodiment;

[0020] Figure 3 It is a schematic diagram of the connection of the controller in this embodiment;

[0021] Figure 4 It is a schematic diagram of the structure of the adjusting nozzle in this embodiment;

[0022] Figure 5 It is a schematic diagram of the structure of the supporting foot plate in this embodiment. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0023] 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 in conjunction with the accompanying drawings in the embodiments of the present utility model.

[0024] It should be noted that if there are directional indications involved in the embodiments of the present utility model (such as up, down, left, right, front, back, top, bottom, inside, outside, vertical, horizontal, longitudinal, counterclockwise, clockwise, circumferential, radial, axial...), then such directional indications are only used to explain the relative positional relationship, movement conditions, etc. between components in a certain specific posture (as shown in the attached drawings). If this specific posture changes, then the directional indications will also change accordingly.

[0025] In addition, if there are descriptions involving "first" or "second" in the embodiments of the present utility model, then such descriptions of "first" or "second" are only for descriptive purposes and cannot be understood as indicating or implying their 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 ability of those of ordinary skill in the art to implement. When the combination of technical solutions results in contradictions or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection required by the present utility model.

[0026] As Figures 1 to 5 shown, this embodiment discloses an air volume device of a range hood measurement system, including a measurement unit pipe body 1, an air volume adjustment module 2 for adjusting the air volume size, and a controller 3 for controlling the operation of the air volume adjustment module 2. One end of the measurement unit pipe body 1 is provided with an air inlet 11 for connecting the range hood to be measured, and the other end is provided with an air outlet 12 for connecting an exhaust fan. The exhaust fan is used to form a negative pressure on the side of the air volume adjustment module 2 facing away from the air inlet 11; a measurement air duct 13 communicating the air inlet 11 and the air outlet 12 is provided inside the measurement unit pipe body 1; the air volume adjustment module 2 is installed inside the measurement unit pipe body 1, and the air volume adjustment module 2 covers the cross-section of the measurement air duct 13; the air volume adjustment module 2 includes at least three adjustment nozzles 21, and the opening adjustment ranges and unit opening adjustment amounts of each adjustment nozzle 21 are different. The total opening of the air volume adjustment module 2 is equal to the sum of the openings of each adjustment nozzle 21.

[0027] In this embodiment, the air volume adjustment module 2 includes at least one adjustment nozzle 21 with an opening adjustment range of 0 - 10 cm 2 and a unit opening adjustment amount of 1 cm 2 an adjustment nozzle 21 with an opening adjustment range of 0 - 100 cm 2 and a unit opening adjustment amount of 10 cm 2 an adjustment nozzle 21 with an opening adjustment range of 0 - 1000 cm 2 and a unit opening adjustment amount of 100 cm 2Adjusting nozzle 21; at this time, the opening adjustment range of the air volume adjustment module 2 is 0 to 1110 cm 2 , by setting the adjusting nozzles 21 with different opening adjustment ranges, it is possible to increase the opening adjustment range of the air volume adjustment module 2 and ensure the adjustment accuracy at the same time. When the air volume adjustment module 2 is adjusted, an adjustment of 1 cm 2 , 10 cm 2 and 100 cm 2 of the unit opening adjustment amount can be achieved, and the adjustment is more convenient and rapid.

[0028] Specifically, the adjusting nozzle 21 includes an air inlet flaring 211, an air outlet cylinder 212 and an adjusting push rod 213. The air inlet flaring 211 is connected to one end of the air outlet cylinder 212. The air outlet cylinder 212 is provided with an inner cavity through which gas can flow. The outer wall of the air outlet cylinder 212 is provided with multiple groups of ventilation holes 214 for gas to flow out. Each group of ventilation holes 214 is arranged at intervals along the axial direction of the air outlet cylinder 212. One end of the adjusting push rod 213 is provided with a piston 215. The piston 215 is arranged in the inner cavity. The outer side wall of the piston 215 is closely attached to the inner wall of the air outlet cylinder 212. The other end of the adjusting push rod 213 extends along the axial direction of the air outlet cylinder 212 and extends out from the other end of the air outlet cylinder 212. The other end of the adjusting push rod 213 is provided with a connecting block 216 for connecting the adjusting drive mechanism 217. The adjusting push rod 213 drives the connecting block 216 to move axially through the adjusting drive mechanism 217, thereby driving the piston 215 to move axially along the inner cavity, changing the position of the piston 215, and changing the number of ventilation holes 214 ventilated in the air outlet cylinder 212, so as to achieve the effect of air volume adjustment. Preferably, 10 groups of ventilation holes 214 are provided, and each group of ventilation holes 214 corresponds to 1 unit opening adjustment amount in the adjusting nozzle 21. When the adjusting nozzle 21 adjusts the air volume opening, it only needs to push the piston 215 axially to change the position of the piston 215, so as to control the connection and closing of the corresponding ventilation holes 214. The control structure is simplified, the accuracy is improved, and there is basically no problem of adjustment failure.

[0029] Furthermore, in order to facilitate the measurement personnel to observe and determine the adjustment situation of the adjusting nozzle 21, an observation window 14 is provided on the side wall of the measuring unit pipe body 1. The observation window 14 communicates with the measuring air duct 13, and the position of the observation window 14 corresponds to the position of the air volume adjustment module 2, so that the measurement personnel can clearly see through the observation window 14 whether the adjusting nozzle 21 makes corresponding adjustments and whether the adjustment actions are completed, etc.

[0030] Further, in order to facilitate the measurement personnel to quickly understand the air volume adjustment state of each adjustment nozzle 21, at least three scale bars 6 are further provided inside the measuring unit pipe body 1. Each adjustment nozzle 21 is provided with a scale bar 6. The scale bar 6 extends along the moving direction of the adjustment push rod 213. A pointer 7 pointing to the scale bar 6 is provided on the outer side wall of the connecting block 216. The measurement personnel can see the position of the scale bar 6 pointed by the pointer 7 corresponding to each adjustment nozzle 21 through the observation window 14, and accurately read the air volume adjustment state of the adjustment nozzle 21.

[0031] In this embodiment, a wind speed sensor 4 is provided at one end of the air outlet cylinder 212 connected to the air inlet flaring 211. Both the adjustment nozzle 21 and the wind speed sensor 4 are electrically connected to the controller 3. The controller 3 controls the air volume opening adjustment of the adjustment nozzle 21. The wind speed signal monitored by the wind speed sensor 4 is transmitted into the controller 3. The controller 3 calculates the air volume value measured by the range hood through the air volume opening adjustment amount, wind speed and time of the adjustment nozzle 21.

[0032] In this embodiment, in order to facilitate the installation and fixation of the measuring unit pipe body 1, a plurality of support foot plates 5 are provided at the bottom of the measuring unit pipe body 1. The plurality of support foot plates 5 are arranged at intervals along the axial direction of the measuring unit pipe body 1. The top of the support foot plate 5 is an arc-shaped structure 51 that fits the outer side wall of the measuring unit pipe body 1. The bottom of the support foot plate 5 is a supporting plate surface 52 bent along the horizontal plane. A vertical supporting plate surface 53 is provided between the arc-shaped structure 51 and the supporting plate surface 52. By providing the support foot plates 5, the measuring unit pipe body 1 can be stably installed on the chassis or the ground, so as to ensure stable data during measurement of the air volume device, and further ensure accurate measurement data of the range hood.

[0033] 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 device of an oil fume extractor measurement system, characterized in that: It includes a measuring unit pipe body (1), an air volume adjustment module (2) for adjusting the air volume, and a controller (3) for controlling the operation of the air volume adjustment module (2). One end of the measuring unit pipe body (1) is provided with an air inlet (11) for connecting the range hood to be measured, and the other end is provided with an air outlet (12) for connecting the exhaust fan. Inside the measuring unit pipe body (1), there is a measuring air duct (13) communicating the air inlet (11) and the air outlet (12). The air volume adjustment module (2) is installed inside the measuring unit pipe body (1), and the air volume adjustment module (2) covers the cross-section of the measuring air duct (13). The air volume adjustment module (2) includes at least three adjustment nozzles (21), and the opening adjustment ranges and the unit opening adjustment amounts of each adjustment nozzle (21) are different. The total opening of the air volume adjustment module (2) is equal to the sum of the openings of each adjustment nozzle (21).

2. The air volume device of a range hood measurement system according to claim 1, characterized in that: The air volume adjustment module (2) includes at least one adjustment nozzle (21) with an opening adjustment range of 0 to 10 cm 2 and a unit opening adjustment amount of 1 cm 2 an adjustment nozzle (21) with an opening adjustment range of 0 to 100 cm 2 and a unit opening adjustment amount of 10 cm 2 and an adjustment nozzle (21) with an opening adjustment range of 0 to 1000 cm 2 and a unit opening adjustment amount of 100 cm 2 of the adjustment nozzle (21).

3. The air volume device of a range hood measurement system according to claim 2, characterized in that: The adjustment nozzle (21) includes an air inlet flare (211), an air outlet cylinder (212), and an adjustment push rod (213). The air inlet flare (211) is connected to one end of the air outlet cylinder (212). An inner cavity for gas to flow through is provided inside the air outlet cylinder (212). Multiple groups of ventilation holes (214) for gas to flow out are provided on the outer wall of the air outlet cylinder (212). Each group of ventilation holes (214) is arranged at intervals along the axial direction of the air outlet cylinder (212). One end of the adjustment push rod (213) is provided with a piston (215). The piston (215) is arranged inside the inner cavity. The outer side wall of the piston (215) is closely attached to the inner wall of the air outlet cylinder (212). The other end of the adjustment push rod (213) extends along the axial direction of the air outlet cylinder (212) and extends out from the other end of the air outlet cylinder (212). A connecting block (216) for connecting the adjustment driving mechanism (217) is provided at the other end of the adjustment push rod (213). The adjustment push rod (213) drives the connecting block (216) to move axially through the adjustment driving mechanism (217).

4. The air volume device of an oil fume exhaust system according to claim 3, characterized in that: There are 10 groups of the ventilation holes (214), and each group of ventilation holes (214) corresponds to 1 unit opening adjustment amount in the adjustment nozzle (21).

5. The air volume device of a range hood measurement system according to claim 3, characterized in that: An observation window (14) is provided on the side wall of the measuring unit pipe body (1). The observation window (14) communicates with the measuring air duct (13), and the position of the observation window (14) is related to the position of the air volume adjustment module (2).

6. The air volume device of an oil fume exhaust system according to claim 5, characterized in that: At least three scale bars (6) are further provided inside the measuring unit pipe body (1). Each adjustment nozzle (21) is provided with a scale bar (6). The scale bar (6) extends along the moving direction of the adjustment push rod (213).

7. The air volume device of a range hood measurement system according to claim 6, characterized in that: A pointer (7) pointing to the scale bar (6) is provided on the outer side wall of the connecting block (216).

8. The air volume device of a range hood measurement system according to claim 3, characterized in that: A wind speed sensor (4) is provided at the end of the air outlet cylinder (212) connected to the air inlet flare (211). Both the adjustment nozzle (21) and the wind speed sensor (4) are electrically connected to the controller (3).

9. The air volume device of an oil fume exhaust system according to claim 1, characterized in that: Several support feet (5) are provided at the bottom of the measuring unit pipe body (1). The several support feet (5) are arranged at intervals along the axial direction of the measuring unit pipe body (1).

10. The air volume device of an oil fume extractor measurement system according to claim 9, characterized in that: The top of the supporting foot plate (5) is an arc-shaped structure (51) that fits the outer side wall of the measuring unit pipe body (1). The bottom of the supporting foot plate (5) is a supporting plate surface (52) bent along the horizontal plane. A vertically arranged supporting plate surface (53) is provided between the arc-shaped structure (51) and the supporting plate surface (52).

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