A suction performance test system and a suction performance test method for a smoke machine

Abstract

The present invention discloses a suction performance testing system and a suction performance testing method for a range hood. The suction performance testing system includes an oil fume generating device, an oil fume filtering device, a weighing device, and a processing device. The oil fume filtering device includes a connecting pipe, a filter, and a fan. The filter is communicated with the discharge port of the range hood through the connecting pipe. The filter is used for filtering the oil fume discharged through the discharge port, and the fan is used for adjusting the back pressure of the discharge port. The processing device is used for calculating the oil fume particle escape rate of the range hood according to the mass of the oil fume generated by the oil fume generating device, and the masses of the range hood, the connecting pipe, and the filter before and after sucking the oil fume. It is more accurate than the sampling method. Moreover, by adjusting the back pressure of the discharge port through the fan, it is possible to avoid excessive back pressure at the discharge port caused by setting the filter, making the testing process of the suction performance testing system closer to the actual use situation of the range hood, and further improving the accuracy of calculating the oil fume particle escape rate.

Description

Technical Field

[0001] The present invention relates to the technical field of testing kitchen appliances, and particularly relates to a suction performance testing system and a suction performance testing method for a range hood. Background Art

[0002] As the main source of pollutants in a residence, the problem of how to remove the pollutants generated during the cooking process has attracted much attention. In order to reduce the concentration level of pollutants in the kitchen, local exhaust in the kitchen has become the main solution. As a device that can effectively reduce the pollutant concentration, the range hood is widely used in urban residences. However, the suction performance of the range hood is not clearly and intuitively disclosed in the range hood standard, and whether there is smoke leakage mainly depends on visual inspection.

[0003] The inventors of the present application have found in long-term research and development that currently, generally, sampling points are set, and the oil fume particle escape rate of the range hood is calculated by counting the weight of the adsorbed substances at the sampling points, etc., to reflect the suction performance of the range hood. However, affected by factors such as the installation position of the range hood and the air flow organization in the kitchen, it is easy to cause uneven dispersion of the escaped oil fume particles, and the oil fume particle escape rate obtained by sampling is inaccurate. Summary of the Invention

[0004] The present invention provides a suction performance testing system and a suction performance testing method for a range hood to solve the technical problem of inaccurate testing of the suction performance of the range hood in the prior art.

[0005] To solve the above technical problem, a technical solution adopted by the present invention is to provide a suction performance testing system for a range hood, including:

[0006] An oil fume generating device for generating oil fume to be sucked by the range hood to be tested;

[0007] An oil fume filtering device including a connecting pipe, a filter, and a fan. The filter is communicated with the discharge port of the range hood through the connecting pipe. The filter is used to filter the oil fume discharged through the discharge port, and the fan is used to adjust the back pressure of the discharge port;

[0008] A weighing device for weighing the range hood, the connecting pipe, and the filter before and after sucking the oil fume respectively;

[0009] A processing device for calculating the oil fume particle escape rate of the range hood according to the mass of the oil fume generated by the oil fume generating device and the masses of the range hood, the connecting pipe, and the filter before and after sucking the oil fume.

[0010] In a specific embodiment, the fan is used to adjust the back pressure of the discharge port to 0 to 350 Pa.

[0011] In a specific embodiment, the suction performance testing system further includes a heating element, which is used to heat and dry at least one of the range hood, the connecting pipe, and the filter after the range hood sucks the cooking fume.

[0012] In a specific embodiment, the fan is disposed on a side of the filter away from the discharge port, and the heating element is disposed between the filter and the fan.

[0013] In a specific embodiment, the suction performance testing system further includes a filter pipe, which includes a first pipe section and a second pipe section that are detachably connected. The fan is disposed in the first pipe section, the filter is disposed in the second pipe section, and the second pipe section is communicated with the connecting pipe.

[0014] In a specific embodiment, a buckle is disposed in the first pipe section, and the filter is detachably fixed in the first pipe section through the buckle.

[0015] In a specific embodiment, the cooking fume generating device includes a cooking stove, a liquid container, a delivery pipe communicated with the liquid container, and a flow controller disposed on the delivery pipe. The flow controller is used to deliver a preset volume of liquid from the liquid container to the cooking stove through the delivery pipe, so that the cooking stove converts the liquid into the cooking fume by heating.

[0016] In a specific embodiment, the cooking fume generating device further includes a flow meter and a resetter. The flow controller is used to stop delivering the liquid when the flow meter shows that the volume of the liquid reaches a preset value, and the resetter is used to reset the flow meter after each test is completed.

[0017] To solve the above technical problems, another technical solution adopted by the present invention is to provide a method for testing the suction performance of a range hood, including:

[0018] Weigh the range hood, the connecting pipe, and the filter to be tested;

[0019] Connect the discharge port of the range hood to the filter through the connecting pipe;

[0020] Control the fan to adjust the back pressure of the discharge port;

[0021] Control the cooking fume generating device to generate the cooking fume sucked by the range hood;

[0022] Weigh the range hood, the connecting pipe, and the filter after sucking the cooking fume;

[0023] Calculate the oil fume particle escape rate of the range hood according to the mass of the oil fume generated by the oil fume generating device and the masses of the range hood, the connecting pipe, and the filter before and after sucking the oil fume.

[0024] In a specific embodiment, the steps of calculating the oil fume particle escape rate of the range hood include:

[0025] Calculate the oil fume particle escape rate through the following formula:

[0026] η=(N - G Y -G L -G J ) / N×100%,

[0027] where N is the mass of the oil fume, and G Y , G L , G J are the weight increases of the range hood, the connecting pipe, and the filter respectively.

[0028] The suction performance test system of the range hood of the present invention includes an oil fume generating device, an oil fume filtering device, a weighing device, and a processing device. The oil fume generating device is used to generate oil fume for the range hood to be tested to suck. The oil fume filtering device includes a connecting pipe, a filter, and a fan. The filter is connected to the discharge port of the range hood through the connecting pipe. The filter is used to filter the oil fume discharged through the discharge port. The fan is used to adjust the back pressure of the discharge port. The weighing device is used to weigh the range hood, the connecting pipe, and the filter before and after sucking the oil fume respectively. The processing device is used to calculate the oil fume particle escape rate of the range hood according to the mass of the oil fume generated by the oil fume generating device and the masses of the range hood, the connecting pipe, and the filter before and after sucking the oil fume. The oil fume particle escape rate calculated by the weighing method is more accurate than the sampling method. And by adjusting the back pressure of the discharge port through the fan, it can avoid the back pressure of the discharge port being too large caused by setting the filter, making the test process of the suction performance test system closer to the actual use situation of the range hood, and can further improve the accuracy of calculating the oil fume particle escape rate. Description of the Drawings

[0029] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained according to these drawings, where:

[0030] Figure 1 is a schematic structural diagram of an embodiment of the suction performance test system of the range hood of the present invention;

[0031] Figure 2It is a schematic structural diagram of an oil fume filtering device in an embodiment of the suction performance test system of the range hood of the present invention;

[0032] Figure 3 It is an exploded structural diagram of an oil fume filtering device in an embodiment of the suction performance test system of the range hood of the present invention;

[0033] Figure 4 It is a schematic flow diagram of an embodiment of the suction performance test method of the range hood of the present invention. Detailed implementation manners

[0034] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present invention.

[0035] The terms "first" and "second" in this application are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. In the description of this application, the meaning of "a plurality" is at least two, such as two, three, etc., unless otherwise specifically defined. In addition, the terms "include" and "have" and any variations thereof are intended to cover non-exclusive inclusion. For example, a process, method, system, product or device that includes a series of steps or units is not limited to the listed steps or units, but optionally further includes steps or units not listed, or optionally further includes other steps or units inherent to these processes, methods, products or devices. The term "and / or" is only a description of the association relationship of associated objects, indicating that three relationships can exist. For example, A and / or B can represent: A exists alone, A and B exist simultaneously, and B exists alone. In addition, the character " / " in this article generally represents an "or" relationship between the associated objects before and after.

[0036] See Figure 1 and Figure 2, an embodiment of the suction performance test system 10 of the smoke machine of the present invention includes an oil fume generating device 100, an oil fume filtering device 200, a weighing device (not shown in the figure), and a processing device (not shown in the figure). The oil fume generating device 100 is used to generate the oil fume to be sucked by the smoke machine 20 to be tested. The oil fume filtering device 200 includes a connecting pipe 210, a filter 220, and a fan 230. The filter 220 is communicated with the discharge port (not marked in the figure) of the smoke machine 20 through the connecting pipe 210. The filter 220 is used to filter the oil fume discharged through the discharge port. The fan 230 is used to adjust the back pressure of the discharge port. The weighing device is used to weigh the smoke machine 20, the connecting pipe 210, and the filter 220 before and after sucking the oil fume respectively. The processing device is used to calculate the oil fume particle escape rate of the smoke machine 20 according to the mass of the oil fume generated by the oil fume generating device 100 and the masses of the smoke machine 20, the connecting pipe 210, and the filter 220 before and after sucking the oil fume. The oil fume particle escape rate calculated by the weighing method is more accurate than the sampling method. And by adjusting the back pressure of the discharge port through the fan 230, it is possible to avoid the back pressure of the discharge port being too large caused by setting the filter 220, making the test process of the suction performance test system 10 closer to the actual use situation of the smoke machine 20, and further improving the accuracy of calculating the oil fume particle escape rate.

[0037] In this embodiment, the oil fume generating device 100 includes a cooking stove 110, a liquid container 120, a delivery pipe 130 communicated with the liquid container 120, and a flow controller 140 arranged on the delivery pipe 130. The flow controller 140 is used to deliver a preset volume of liquid from the liquid container 120 to the cooking stove 110 through the delivery pipe 130, so that the cooking stove converts the liquid into oil fume by heating, and the amount of generated oil fume can be accurately controlled by controlling the volume of the liquid, thereby making the test process more accurate.

[0038] In this embodiment, the oil fume generating device 100 may further include a flow meter (not shown in the figure) and a resetter (not shown in the figure). The flow meter is used to display the flow rate of the liquid in the delivery pipe 130. The flow controller 140 is used to stop delivering the liquid when the flow meter shows that the volume of the liquid reaches the preset value. The resetter is used to reset the flow meter after each test is completed, so that the flow meter can start measuring again during the next test, making the control process more simple and accurate.

[0039] In this embodiment, the fan 230 is used to adjust the back pressure of the discharge port to 0 to 350 Pa, such as 0, 100 Pa, or 350 Pa, etc., which can make the test process of the suction performance test system 10 closer to the actual use situation of the smoke machine 20 and improve the accuracy of the test results.

[0040] In this embodiment, the filter 220 can be a high-efficiency filter, which can filter most or all of the oil fumes in the air discharged by the range hood 20, so that the oil fume particle escape rate of the range hood 20 can be calculated by weighing.

[0041] In this embodiment, the suction performance test system 10 can further include a heating element 240, which is used to heat and dry at least one of the range hood 20, the connecting pipe 210 and the filter 220 after sucking oil fumes, which can improve the evaporation speed of moisture in the range hood 20, the connecting pipe 210 and the filter 220, avoid the influence of moisture on the test data, and improve the efficiency and accuracy of the suction performance test of the range hood 20.

[0042] In this embodiment, the fan 230 is arranged on the side of the filter 220 away from the discharge port, and the heating element 240 is arranged between the filter 220 and the fan 230 and is used to heat the filter 220. By arranging the heating element 240 between the filter 220 and the fan 230, it can be avoided that oil fumes adhere to the heating element 240, affecting the heating effect and service life of the heating element 240.

[0043] In other embodiments, the heating element 240 can also be arranged between the filter 220 and the discharge port, which can improve the drying speed of the heating element 240 for the filter 220, and the weight gain of the heating element 240 needs to be included when calculating the oil fume particle escape rate.

[0044] In this embodiment, the drying temperature of the heating element 240 is 80°C to 120°C, such as 80°C, 100°C or 120°C, etc., and the drying time is 40 minutes to 60 minutes, such as 40 minutes, 50 minutes or 60 minutes, etc., which can achieve the rapid drying of the range hood 20, the connecting pipe 210 or the filter 220, and improve the efficiency of the suction performance test.

[0045] In other embodiments, the moisture can also be evaporated by leaving the range hood 20, the connecting pipe 210 and the filter 220 standing still. The standing time is 120 minutes to 150 minutes, such as 120 minutes, 135 minutes or 150 minutes, etc., which can make the moisture in the range hood 20, the connecting pipe 210 and the filter 220 evaporate sufficiently, avoid the influence of moisture on the test data, and improve the accuracy of the suction performance test of the range hood 20.

[0046] See also Figure 3, in this embodiment, the suction performance testing system 10 further includes a filter pipe 250. The filter pipe 250 includes a first pipe section 251 and a second pipe section 252. The fan 230 is disposed inside the first pipe section 251, and the filter 220 is disposed inside the second pipe section 252. The second pipe section 252 communicates with the connecting pipe 210, and the first pipe section 251 and the second pipe section 252 are detachably connected, which facilitates the disassembly and assembly of the filter 220 and the cleaning of the inside of the filter pipe 250.

[0047] In other embodiments, the connecting pipe 210 and the filter pipe 250 may also be integrally provided, and the weight gain of the filter pipe 250 and the filter 220 disposed inside the filter pipe 250 can be directly measured, thereby reducing the number of weighings, making the calculation process simpler, with a smaller calculation amount, and thus being able to reduce the calculation time and improve the efficiency of the suction performance test.

[0048] In this embodiment, the second pipe section 252 may be sleeved inside the first pipe section 251, and the outer diameter of the second pipe section 252 may be slightly larger than the inner diameter of the first pipe section 251, so that the first pipe section 251 and the second pipe section 252 can be fixedly connected by an interference fit.

[0049] In other embodiments, the outer diameter of the second pipe section 252 may also be smaller than or equal to the inner diameter of the first pipe section 251, and the first pipe section 251 and the second pipe section 252 may be fixedly connected by means of screw connection, snap connection or magnetic attraction, etc.

[0050] In this embodiment, a snap 253 may be provided inside the first pipe section 251, and the filter 220 is detachably fixed inside the first pipe section 251 through the snap 253, making the disassembly and assembly of the filter 220 more convenient.

[0051] In other embodiments, the filter 220 may also be fixed inside the first pipe section 251 by other detachable means such as Velcro, magnetic attraction, etc., which are not limited herein.

[0052] In this embodiment, the suction performance testing system 10 may further include an exhaust pipe 260. The exhaust pipe 260 communicates with the filter pipe 250 and the outside respectively, and is used to discharge the gas filtered by the filter pipe 250 to the outside.

[0053] In this embodiment, the exhaust pipe 260 and the filter pipe 250 may be fixedly connected by means of screw connection, snap connection or magnetic attraction, etc.

[0054] See Figures 1 to 4 , the embodiment of the suction performance testing method of the cigarette machine of the present invention includes:

[0055] S310. Weigh the cigarette machine 20, the connecting pipe 210 and the filter 220 to be tested.

[0056] In this embodiment, a platform scale, a weighing scale, etc. can be used to weigh the range hood 20, the connecting pipe 210, and the filter 220 to be tested.

[0057] In this embodiment, an automatic handling device (not shown in the figure) can be used to place the range hood 20, the connecting pipe 210, and the filter 220 to be tested on a scale for weighing respectively, so as to make the test process more automated and intelligent.

[0058] In this embodiment, the weighing data of the range hood 20, the connecting pipe 210, and the filter 220 to be tested can be sent to the processing device by means of wireless transmission, etc., so as to make the test process more automated and intelligent.

[0059] S320. Connect the discharge port of the range hood 20 to the filter 220 through the connecting pipe 210.

[0060] In this embodiment, the connecting pipe 210 can be fixedly connected to the range hood 20 and the filter 220 through detachable means such as threaded connection and snap fasteners.

[0061] S330. Control the fan 230 to adjust the back pressure of the discharge port.

[0062] In this embodiment, a pressure sensor (not shown in the figure) can be provided at the discharge port of the range hood 20, which can detect the back pressure value of the discharge port. When the suction performance test starts, the speed of the fan 230 is gradually increased. When the difference between the back pressure value detected by the pressure sensor and the back pressure value of the discharge port during normal use of the range hood 20 is less than a preset threshold, the increase in the speed of the fan 230 is stopped. At this time, the speed of the fan 230 is the preset speed, and the fan 230 is kept rotating at the preset speed until the suction performance test ends.

[0063] In other embodiments, the preset speed of the fan 230 can also be tested before the suction performance test starts. After the suction performance test starts, the fan 230 directly starts and operates at the preset speed, which can further improve the accuracy of the suction performance test.

[0064] S340. Control the oil fume generating device 100 to generate the oil fume sucked by the range hood.

[0065] In this embodiment, the oil fume can be generated by heating the water-oil mixture with the cooking stove 110.

[0066] S350. Weigh the range hood 20, the connecting pipe 210, and the filter 220 after sucking the oil fume;

[0067] S360. Calculate the oil fume particle escape rate of the range hood 20 according to the mass of the oil fume generated by the oil fume generating device 100 and the masses of the range hood 20, the connecting pipe 210, and the filter 220 before and after sucking the oil fume.

[0068] In this embodiment, the mass of the cooking fume can be obtained according to the mass of the liquid that generates the cooking fume.

[0069] The escape rate of cooking fume particles calculated by the weighing method is more accurate than that by the sampling method. Moreover, by adjusting the back pressure of the discharge port through the blower 230, it is possible to avoid excessive back pressure at the discharge port caused by setting the filter 220, making the test process of the suction performance test system 10 closer to the actual use situation of the range hood 20, and further improving the accuracy of calculating the escape rate of cooking fume particles.

[0070] In this embodiment, the steps of calculating the escape rate of cooking fume particles of the range hood 20 according to the mass of the cooking fume generated by the cooking fume generating device 100 and the masses of the range hood 20, the connecting pipe 210, and the filter 220 before and after sucking the cooking fume include:

[0071] Calculate the escape rate of cooking fume particles through the following formula:

[0072] η=(N - G Y - G L - G J ) / N×100%,

[0073] where N is the mass of the cooking fume, and G Y , G L , G J are the weight increases of the range hood 20, the connecting pipe 210, and the filter 220 respectively.

[0074] Specifically, the mass N of the cooking fume is equal to the mass of the liquid that generates the cooking fume. And through the preset volume V of the liquid, N = V×ρ can be obtained, where ρ is the density of the liquid, which can be 0.90 to 0.94, such as 0.90, 0.92, or 0.94, etc.

[0075] Before sucking the cooking fume, the mass of the range hood 20 can be measured as G Y1 , the mass of the connecting pipe 210 can be measured as G L1 , and the mass of the filter 220 can be measured as G J1 . After sucking the cooking fume, the mass of the range hood 20 can be measured as G Y2 , the mass of the connecting pipe 210 can be measured as G L2 , and the mass of the filter 220 can be measured as G J2 . Then, the weight increase G Y of the range hood 20 can be obtained as G Y2 - G Y1 , the weight increase G L of the connecting pipe 210 is G L2 - G L1, , and the weight increase G J of the filter 220 is G J2 - GJ1 。

[0076] The calculation method of the present application is simple and has a small amount of calculation. It can quickly calculate the escape rate of oil fume particles according to the test results, improve the efficiency of the suction performance test of the range hood 20, and thus can more clearly and intuitively disclose the suction performance of the range hood 20.

[0077] The above are only the embodiments of the present invention, and do not limit the patent scope of the present invention accordingly. Any equivalent structure or equivalent process transformation made by using the content of the specification and drawings of the present invention, or directly or indirectly applied in other related technical fields, shall be equally included in the patent protection scope of the present invention.

Claims

1. A smoke extraction performance test system for a range hood. It is characterized in that include: A fume generating device, used to generate fume for the hood to be tested to draw in; An oil fume filtering device, comprising a connecting pipe, a filter and a fan, wherein the filter is connected to the exhaust port of the exhaust fan through the connecting pipe, the filter is used to filter the oil fume discharged through the exhaust port, and the fan is used to adjust the back pressure of the exhaust port; A weighing device, used to weigh the range hood, the connecting pipe and the filter before and after the oil fume is sucked out; The processing device is used to calculate the escape rate of the oil fume particles of the range hood according to the mass of the oil fume generated by the oil fume generating device, the mass of the range hood, the connecting pipe and the filter before and after sucking the oil fume.

2. The suction performance testing system according to claim 1, It is characterized in that The fan is used to adjust the back pressure of the discharge port to 0 to 350 Pa.

3. The suction performance testing system according to claim 1, It is characterized in that The suction performance testing system further includes a heating element, and the heating element is used to heat and dry at least one of the hood, the connecting pipe and the filter after the oil smoke is sucked.

4. The suction performance testing system according to claim 3, It is characterized in that The fan is arranged on a side of the filter away from the discharge port, and the heating element is arranged between the filter and the fan.

5. The suction performance testing system according to claim 1, It is characterized in that The suction performance testing system further includes a filter tube, which includes a first pipe section and a second pipe section that are detachably connected, the fan is arranged in the first pipe section, the filter is arranged in the second pipe section, and the second pipe section is connected to the connecting pipe.

6. The suction performance testing system according to claim 5, It is characterized in that A buckle is arranged in the first pipe section, and the filter is detachably fixed in the first pipe section through the buckle.

7. The suction performance testing system according to claim 1, It is characterized in that The oil fume generating device includes a stove, a liquid container, a delivery pipe connected to the liquid container, and a flow controller arranged on the delivery pipe. The flow controller is used to deliver a preset volume of liquid from the liquid container to the stove through the delivery pipe, so that the stove converts the liquid into the oil fume by heating.

8. The suction performance testing system according to claim 7, It is characterized in that The oil fume generating device further includes a flow meter and a resetter, wherein the flow controller is used to stop delivering the liquid when the flow meter shows that the volume of the liquid reaches a preset value, and the resetter is used to reset the flow meter after each test is completed.

9. A method for testing the suction performance of a range hood. It is characterized in that The method comprises: Weigh the range hood, connecting pipe and filter to be tested; Connecting the exhaust port of the range hood to the filter via a connecting pipe; Controlling the fan to adjust the back pressure of the discharge port; Controlling the oil fume generating device to generate the oil fume sucked by the range hood; Weigh the range hood, the connecting pipe, and the filter after sucking the cooking fume; Calculate the cooking fume particle escape rate of the range hood according to the mass of the cooking fume generated by the cooking fume generating device and the masses of the range hood, the connecting pipe, and the filter before and after sucking the cooking fume.

10. The suction performance test method according to claim 9, wherein, the steps of calculating the cooking fume particle escape rate of the range hood include: calculating the cooking fume particle escape rate through the following formula: η = (N - G Y - G L - G J ) / N × 100%, Wherein, N is the mass of the fume, G Y , G L , G J are the weight increases of the range hood, the connecting pipe, and the filter respectively.

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