Method for evaluating the suitability of an auxiliary fan, exhaust fume system, device and program product

Abstract

The disclosure provides a kind of adaptability evaluation method of auxiliary fan, smoke exhaust system, equipment and program product, auxiliary fan is connected in series with extractor hood by smoke exhaust pipeline, and the adaptability evaluation method includes: obtaining the first power and gear of extractor hood when auxiliary fan is closed, obtains the second power of extractor hood when auxiliary fan is opened under the same gear;Obtain the corresponding relationship of the power and air volume of extractor hood corresponding to the gear;According to the first power and the corresponding relationship, the first air volume is calculated, and the second air volume is calculated according to the second power and the corresponding relationship;If it meets the judgment condition, then auxiliary fan meets the adaptability of extractor hood.The performance of auxiliary fan is evaluated by adaptability, so that auxiliary fan that meets the adaptability requirement can reduce the smoke exhaust resistance of extractor hood in high resistance smoke exhaust scene, thereby avoiding the substantial increase of extractor fan speed, and further avoiding the substantial increase of working noise, reducing the motor temperature rise, and increasing the service life of extractor fan.

Description

TECHNICAL FIELD

[0001] The present disclosure relates to the technical field of household appliances, and in particular to a method for evaluating the adaptability of an auxiliary fan, an exhaust system, a device, and a program product. BACKGROUND

[0002] Some residences have difficulty in exhausting oil fumes due to poor exhaust passages and high resistance. At present, in order to solve this difficulty, the working capacity is improved by increasing the speed of the fan in the oil fume extractor, so as to ensure that the working air volume of the oil fume extractor is not too small. However, the following defects exist:

[0003] (1) Increasing the speed of the fan will greatly increase the working noise;

[0004] (2) Increasing the speed of the fan will greatly increase the working current, increase the temperature rise of the motor, and reduce the service life. SUMMARY

[0005] The technical problem to be solved by the present disclosure is to overcome the defects in the prior art that the working capacity is improved by increasing the speed of the fan in the oil fume extractor, and to provide a method for evaluating the adaptability of an auxiliary fan, an exhaust system, a device, and a program product.

[0006] The present disclosure solves the above technical problems by the following technical solutions:

[0007] The present disclosure provides a method for evaluating the adaptability of an auxiliary fan, the auxiliary fan being connected in series with an oil fume extractor through an exhaust duct, the method comprising:

[0008] obtaining a first power and a gear position of the oil fume extractor when the auxiliary fan is closed, and obtaining a second power of the oil fume extractor when the auxiliary fan is opened at the same gear position;

[0009] obtaining a corresponding relationship between the power and the air volume of the oil fume extractor corresponding to the gear position;

[0010] calculating a first air volume according to the first power and the corresponding relationship, and calculating a second air volume according to the second power and the corresponding relationship;

[0011] If the judgment condition is met, the auxiliary fan meets the adaptability with the oil fume extractor.

[0012] Optionally, the corresponding relationship is measured for the same type of oil fume extractor without an auxiliary fan.

[0013] Optionally, the judgment condition comprises:

[0014] The difference between the second air volume and the first air volume is greater than or equal to a preset first threshold value, and a ratio of the difference to the first air volume is greater than or equal to a preset second threshold value when the gear is a highest speed gear.

[0015] Optionally, the judgment condition further comprises:

[0016] The difference is greater than or equal to a preset third threshold value when the gear is a short-time speed-up gear.

[0017] The third threshold value is less than the first threshold value.

[0018] Optionally, the judgment condition further comprises:

[0019] The fluctuation of the second power in a preset time period is less than a preset fourth threshold value.

[0020] Optionally, the adaptability evaluation method further comprises:

[0021] When the fluctuation is greater than or equal to the fourth threshold value, if the auxiliary fan is a variable-speed fan and the difference is greater than or equal to a preset fifth threshold value when the gear is a highest speed gear, the input power of the auxiliary fan is lowered, and it is detected again whether the judgment condition is met.

[0022] The fifth threshold value is greater than the first threshold value.

[0023] Optionally, the lowering of the input power of the auxiliary fan comprises:

[0024] The input power of the auxiliary fan is lowered by a preset ratio, or the input power of the auxiliary fan is lowered by a preset power increment.

[0025] The disclosure also provides a smoke exhaust system, comprising: an extractor hood and an auxiliary fan.

[0026] The air inlet of the auxiliary fan is in communication with the air outlet of the extractor hood through a smoke exhaust duct.

[0027] The auxiliary fan is evaluated by the aforementioned adaptability evaluation method of the auxiliary fan and meets the adaptability.

[0028] The disclosure also provides an electronic device, comprising a memory, a processor, and a computer program stored in the memory and used for running on the processor, wherein the processor implements the aforementioned adaptability evaluation method of the auxiliary fan when executing the computer program.

[0029] The disclosure also provides a computer program product, comprising a computer program, wherein the computer program is executed by a processor to implement the aforementioned adaptability evaluation method of the auxiliary fan.

[0030] The above-mentioned preferred conditions can be combined arbitrarily to obtain preferred examples of the present disclosure.

[0031] The positive progress effect of the present disclosure is that the performance of the auxiliary fan is assisted by the adaptability evaluation, so that the auxiliary fan meeting the adaptability requirement can reduce the exhaust resistance of the range hood in the high-resistance exhaust scene, thereby avoiding the range hood fan speed from being greatly increased, further avoiding the working noise from being greatly increased, reducing the motor temperature rise, and increasing the service life of the range hood fan. BRIEF DESCRIPTION OF DRAWINGS

[0032] Figure 1 A flowchart of an adaptability evaluation method of an auxiliary fan provided for an example 1 of the present disclosure is shown in the figure.

[0033] Figure 2 A module schematic diagram of an exhaust system provided for an example 2 of the present disclosure is shown in the figure.

[0034] Figure 3 A structure schematic diagram of an electronic device provided for an example 3 of the present disclosure is shown in the figure. DETAILED DESCRIPTION

[0035] The present disclosure will be further described below by way of examples, but the present disclosure is not limited in the scope of the examples.

[0036] In the examples of the present disclosure, the prefix words such as "first", "second" are only used to distinguish different description objects, and have no limiting effect on the position, order, priority, quantity or content of the described objects. The use of ordinal words such as ordinal words in the examples of the present disclosure does not constitute a limitation on the described objects, and the description of the described objects should be seen in the context of the claims or examples, and should not constitute an unnecessary limitation because of the use of such prefix words. In addition, in the description of the examples, unless otherwise stated, the meaning of "a plurality of" is two or more.

[0037] Example 1

[0038] Figure 1 A flowchart of an adaptability evaluation method of an auxiliary fan provided for an example of the present disclosure is shown in the figure, the auxiliary fan and the range hood are connected in series through the exhaust duct, the air inlet of the auxiliary fan is communicated with the air outlet of the range hood, and the adaptability evaluation method comprises:

[0039] S11, obtaining the first power and the gear of the range hood when the auxiliary fan is closed, and obtaining the second power of the range hood when the auxiliary fan is opened under the same gear.

[0040] S12, obtaining the corresponding relationship between the power and the air volume of the range hood corresponding to the gear.

[0041] S13, the first air volume is calculated according to the first power and corresponding relationship, and the second air volume is calculated according to the second power and corresponding relationship.

[0042] S14, if the judgment condition is met, the auxiliary fan meets the adaptability of the range hood.

[0043] Wherein, the complex fan with insufficient performance will increase the exhaust resistance of the range hood, and the user needs to judge whether the pipeline fan selected on the market can be installed as an auxiliary fan in the exhaust system and adapt to the range hood in the current kitchen environment.

[0044] The adaptability problem refers to the fact that not any auxiliary fan can benefit the range hood to better exhaust smoke. If the air volume of the auxiliary fan itself at a static pressure of 0 (working air volume) is lower than the working air volume expected to be reached by the series system, according to the principle of mass conservation: the air volume at each point in the series system must be the same, then in this case the auxiliary fan can still produce additional air volume higher than its limit performance, which is actually due to the additional work of the range hood. Therefore, in the above case, the addition of the auxiliary fan will actually increase the back-end resistance of the range hood, and cannot achieve the effect of auxiliary exhaust.

[0045] The adapted auxiliary fan can reduce the back-end exhaust resistance of the range hood, increase the ventilation of the exhaust system without changing the user's habits, that is, after installing the auxiliary fan, the user does not need to change his habits, and still only needs to operate the range hood, and the auxiliary fan will start and stop with the opening or closing of the range hood.

[0046] Since the change of the back-end resistance of the range hood will cause the change of the power of the range hood, the degree of resistance change can be judged, and then it can be judged whether the auxiliary fan works.

[0047] The following two different scenes of range hood operating power need to be compared to give the judgment:

[0048] Scene one, the exhaust system has no auxiliary fan, at this time only the range hood works to resist the resistance of the flue.

[0049] Scene two, the auxiliary fan is connected to the exhaust system, and runs simultaneously with the range hood, and should run at rated power.

[0050] The power of the range hood can be measured by a power meter. The current of the range hood can also be measured by a current meter, and since the voltage is determined, the power of the range hood can be calculated according to the current * voltage.

[0051] Each gear of the range hood corresponds to a range hood power P and air volume Q corresponding relationship P=f(Q). The first power is P1, the first air volume is Q1, the second power is P2, the second air volume is Q2, P1=f(Q1), P2=f(Q2).

[0052] If the judgment condition is not met all the time, the auxiliary fan does not meet the adaptability to the range hood.

[0053] In this embodiment, the performance of the auxiliary fan is evaluated through adaptability, so that the auxiliary fan meeting the adaptability requirement can reduce the smoke exhaust resistance of the range hood in a high-resistance smoke exhaust scene, thereby avoiding a substantial increase in the fan speed of the range hood, further avoiding a substantial increase in the working noise, reducing the motor temperature rise, and increasing the service life of the range hood fan.

[0054] In one embodiment, the corresponding relationship is measured for the same model of range hood without an auxiliary fan.

[0055] In one embodiment, the judgment condition includes:

[0056] When the gear is the highest speed gear, the difference between the second air volume and the first air volume is greater than or equal to a preset first threshold, and the ratio of the difference to the first air volume is greater than or equal to a preset second threshold.

[0057] Wherein, the range hood power P2 in scene two is different from the range hood power P1 in scene one, after the auxiliary fan is connected and runs, the rear-end resistance of the range hood is reduced, and the air volume is increased from Q1 to Q2, that is, f -1 (P2)-f -1 (P1)≥ the first threshold, which is to ensure that the air volume increase realized by the auxiliary fan is sufficient to significantly improve the smoke suction effect.

[0058] When the rear-end resistance of the range hood is large, after the auxiliary fan is connected, the noise change is not obvious; otherwise, if the rear-end resistance is not large and the auxiliary fan is still installed, the noise will increase significantly. And the working air volume of the range hood decreases with the increase of the rear-end resistance, so the smaller the working air volume f -1 (P1) in scene one is, the more suitable it is to install the auxiliary fan; and the larger the working air volume change f -1 (P2)-f -1 (P1) after the auxiliary fan is installed, the higher the user tolerance is; in combination with the above two points, there is the requirement: [f -1 (P2)-f -1 (P1)] / f -1 (P1)≥ the second threshold.

[0059] The first threshold and the second threshold can be set according to the actual situation, for example, the first threshold is set to 2 m 3 / min, and the second threshold is set to 0.18.

[0060] In one embodiment, the judgment condition further includes:

[0061] When the gear is the short-time speed-up gear, the difference is greater than or equal to a preset third threshold.

[0062] wherein the third threshold value is less than the first threshold value.

[0063] wherein the performance of the range hood in the short-time speed-up gear is higher than that in the highest speed gear, so for a specific fan, the auxiliary effect of the range hood in the short-time speed-up gear is lower than that in the highest speed gear, but the air volume of the series connection system is necessarily higher than that of the series connection system in the highest speed gear.

[0064] This shows that as long as the highest speed gear meets the requirements, the air volume of the series connection system in the short-time speed-up gear also meets the requirements.

[0065] But it also needs to meet f -1 (P2)-f -1 (P1)≥ the third threshold value is to ensure that the auxiliary fan performance still has a margin, avoiding the situation that the auxiliary fan performance leads to an increase in the back-end resistance of the range hood.

[0066] The third threshold value can be set according to actual conditions, for example, the third threshold value is set to 0.5 m 3 / min.

[0067] In one embodiment, the judgment condition further includes:

[0068] The fluctuation of the second power in the preset time period is less than a preset fourth threshold value.

[0069] wherein the power of the range hood and the auxiliary fan in the starting period is a dynamic process, so before comparing the power of the range hood before and after the series connection fan, it is necessary to ensure that the value used for comparison and judgment is stable.

[0070] The starting period usually does not last long, so a stable value can generally be obtained quickly, but when the auxiliary fan or the range hood has a stall, surge or other problems, the series connection system will always be unable to operate stably. The reason may not be due to insufficient performance of the auxiliary fan, but it is also a manifestation of poor adaptability.

[0071] If the stable range hood power value that meets the requirements cannot be obtained, it is also determined that the auxiliary fan is not adapted to the range hood.

[0072] The fourth threshold value can be set according to actual conditions, for example, the fourth threshold value is set to 1%.

[0073] The preset time period can be set according to actual conditions, for example, the test of the power of the range hood is performed every 3 seconds, and the duration of the preset time period is set to 15 seconds, and the calculation of the mean value can be performed every 15 seconds.

[0074] In one embodiment, the adaptability evaluation method further includes:

[0075] When the fluctuation is greater than or equal to the fourth threshold value, if the auxiliary fan is a variable-speed fan and the gear is the highest speed gear, and the difference is greater than or equal to a preset fifth threshold value, the input power of the auxiliary fan is lowered, and whether the judgment condition is met is re-detected.

[0076] The fifth threshold value is greater than the first threshold value.

[0077] The fifth threshold value can be set according to actual conditions, for example, the fifth threshold value is set to 3 m 3 / min.

[0078] In one embodiment, the input power of the auxiliary fan is lowered, including:

[0079] The input power of the auxiliary fan is lowered by a preset ratio, or the input power of the auxiliary fan is lowered by a preset power increment.

[0080] The preset ratio can be set according to actual conditions, for example, the input power of the auxiliary fan is lowered to 0.95 times the original input power each time.

[0081] The preset power increment can be set according to actual conditions, for example, the preset power increment is -10 W.

[0082] Embodiment 2

[0083] Figure 2 A module schematic diagram of a smoke exhaust system is provided for an exemplary embodiment of the present disclosure, the system comprising: an extractor hood 1 and an auxiliary fan 2, 0 in the figure represents a kitchen environment, and 4 represents an external environment.

[0084] The air inlet of the auxiliary fan 2 is communicated with the air outlet of the extractor hood 1 through a smoke exhaust duct.

[0085] The auxiliary fan 2 is evaluated by the adaptability evaluation method of the auxiliary fan in embodiment 1 and meets the adaptability.

[0086] The components are connected through a smoke pipe, and the auxiliary fan and the smoke machine form a series relationship.

[0087] The extractor hood and the auxiliary fan can be controlled by a controller or a signal processor.

[0088] In this embodiment, the performance of the auxiliary fan is evaluated by adaptability, so that the auxiliary fan that meets the adaptability requirement can reduce the smoke exhaust resistance of the extractor hood in a high-resistance smoke exhaust scene, thereby avoiding a large increase in the speed of the extractor hood fan, further avoiding a large increase in the working noise, reducing the motor temperature rise, and increasing the service life of the extractor hood fan.

[0089] Embodiment 3

[0090] Figure 3This is a schematic diagram of the structure of an electronic device according to an example embodiment of the present disclosure. The electronic device includes a memory, a processor, and a computer program stored in the memory and used to run on the processor. When the processor executes the computer program, it implements the auxiliary fan adaptability evaluation method described in any of the above embodiments. Figure 3 The electronic device 90 shown is merely an example and should not impose any limitation on the functionality and scope of use of the embodiments disclosed herein.

[0091] like Figure 3 As shown, the electronic device 90 can be manifested as a general-purpose computing device, such as a server device. The components of the electronic device 90 may include, but are not limited to: at least one processor 91, at least one memory 92, and a bus 93 connecting different system components (including memory 92 and processor 91).

[0092] Bus 93 includes a data bus, an address bus, and a control bus.

[0093] The memory 92 may include volatile memory, such as random access memory (RAM) 921 and / or cache memory 922, and may further include read-only memory (ROM) 923.

[0094] The memory 92 may also include a program tool 925 (or utility) having a set (at least one) program module 924, including but not limited to: an operating system, one or more application programs, other program modules, and program data, each or some combination of these examples may include an implementation of a network environment.

[0095] The processor 91 executes various functional applications and data processing by running computer programs stored in the memory 92, such as the auxiliary fan adaptability evaluation method provided in any of the above embodiments.

[0096] Electronic device 90 can also communicate with one or more external devices 94 (e.g., keyboard, pointing device, etc.). This communication can be performed through input / output (I / O) interface 95. Furthermore, electronic device 90 can also communicate with one or more networks (e.g., local area network (LAN), wide area network (WAN), and / or public network, such as the Internet) via network adapter 96. As shown, network adapter 96 communicates with other modules of electronic device 90 via bus 93. It should be understood that, although not shown in the figure, other hardware and / or software modules can be used in conjunction with electronic device 90, including but not limited to: microcode, device drivers, redundant processors, external disk drive arrays, RAID (disk array) systems, tape drives, and data backup storage systems.

[0097] It should be noted that although several units / modules or sub-units / modules of the electronic device are mentioned in the above detailed description, such division is merely exemplary and not mandatory. In fact, according to embodiments of the present disclosure, features and functions of two or more units / modules described above can be embodied in one unit / module. Conversely, features and functions of one unit / module described above can be further divided into units / modules for embodiment.

[0098] Embodiment 4

[0099] The embodiments of the present disclosure further provide a computer program product comprising a computer program which, when executed by a processor, implements the auxiliary fan adaptability evaluation method of any one of the above.

[0100] Wherein, the program code for executing the computer program product of the present disclosure can be written in any combination of one or more programming languages, which can be executed entirely on the user device, partially on the user device, as an independent software package, partially on the user device and partially on the remote device, or entirely on the remote device.

[0101] Although the specific embodiments of the present disclosure are described above, those skilled in the art should understand that this is only an illustration, and the protection scope of the present disclosure is defined by the appended claims. Those skilled in the art can make various changes or modifications to these embodiments without departing from the principles and essence of the present disclosure, and such changes and modifications all fall within the protection scope of the present disclosure.

Claims

1. A method of evaluating the fitness of an auxiliary fan, characterized by, The auxiliary fan is connected with the range hood through the exhaust duct, and the adaptability evaluation method comprises: obtaining the first power and the gear of the range hood when the auxiliary fan is closed, and obtaining the second power of the range hood when the auxiliary fan is opened at the same gear; obtaining the corresponding relationship between the power and the air volume of the range hood corresponding to the gear; calculating the first air volume according to the first power and the corresponding relationship, and calculating the second air volume according to the second power and the corresponding relationship; if the judgment condition is met, the auxiliary fan meets the adaptability with the range hood; the judgment condition comprises: when the gear is the highest speed gear, the difference between the second air volume and the first air volume is greater than or equal to the first preset threshold, and the ratio of the difference to the first air volume is greater than or equal to the second preset threshold; the judgment condition further comprises: when the gear is the short-time speed-up gear, the difference is greater than or equal to the third preset threshold; wherein the third threshold is less than the first threshold; the judgment condition further comprises: the fluctuation of the second power within the preset time period is less than the fourth preset threshold.

2. The method of evaluating the adaptability of an auxiliary fan according to claim 1, wherein The corresponding relationship is measured under the condition of no auxiliary fan for the same type of range hood.

3. The method of claim 1, wherein, The adaptability evaluation method further comprises: when the fluctuation is greater than or equal to the fourth threshold, if the auxiliary fan is a variable speed fan and the difference is greater than or equal to the fifth preset threshold when the gear is the highest speed gear, the input power of the auxiliary fan is adjusted downward, and whether the judgment condition is met is detected again; wherein the fifth threshold is greater than the first threshold.

4. The method of evaluating the adaptability of an auxiliary fan according to claim 3, wherein The input power of the auxiliary fan is adjusted downward, comprising: adjusting the input power of the auxiliary fan downward by a preset ratio, or adjusting the input power of the auxiliary fan downward by a preset power increment.

5. A smoke evacuation system characterized by, The exhaust system comprises: a range hood and an auxiliary fan; the air inlet of the auxiliary fan is communicated with the air outlet of the range hood through the exhaust duct; the auxiliary fan is evaluated by the adaptability evaluation method of the auxiliary fan according to any one of claims 1-4 and meets the adaptability.

6. An electronic device comprising a memory, a processor, and a computer program stored on the memory for running on the processor, characterized in that, The processor executes the computer program to realize the adaptability evaluation method of the auxiliary fan according to any one of claims 1-4.

7. A computer program product comprising a computer program, characterized in that, The computer program is executed by the processor to realize the adaptability evaluation method of the auxiliary fan according to any one of claims 1-4.

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