Adaptability evaluation method of auxiliary fan, smoke exhaust system, equipment and program product

Abstract

The invention provides an suitability evaluation method of an auxiliary fan, a smoke exhaust system, equipment and a program product, the auxiliary fan and a range hood are connected in series through a smoke exhaust pipeline, the suitability evaluation method comprises the following steps: obtaining a first power and a gear of the range hood when the auxiliary fan is closed, and obtaining a second power of the range hood when the auxiliary fan is started at the same gear; the corresponding relation between the power of the range hood and the air volume corresponding to the gear is obtained; first air volume is calculated according to the first power and the corresponding relation, and second air volume is calculated according to the second power and the corresponding relation; and if the judgment condition is met, the auxiliary fan meets the adaptability of the range hood. The performance of the auxiliary fan is evaluated through the suitability, so that the auxiliary fan meeting the suitability requirement can reduce the smoke exhaust resistance of the range hood in a high-resistance smoke exhaust scene, the rotating speed of the fan of the range hood is prevented from being greatly increased, the working noise is further prevented from being greatly increased, the temperature rise of the motor is reduced, and the smoke exhaust efficiency is improved. And the service life of the range hood fan is prolonged.

Description

Technical Field

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

[0002] Some houses have difficulty exhausting smoke from range hoods due to poor exhaust passages and high resistance. At present, in order to solve this problem, the speed of the fan in the range hood is increased to improve the working capacity and ensure that the working air volume of the range hood is not too small. However, there are the following defects:

[0003] (1) Increasing the fan speed will significantly increase the operating noise;

[0004] (2) Increasing the fan speed will significantly increase the operating current, increase the motor temperature rise and reduce the service life. Summary of the invention

[0005] The technical problem to be solved by the present disclosure is to overcome the defect of the prior art in which the working capacity is improved by increasing the rotation speed of the fan in the range hood, and to provide an auxiliary fan adaptability evaluation method, a smoke exhaust system, a device and a program product.

[0006] The present invention solves the above technical problems through the following technical solutions:

[0007] The present disclosure provides a method for evaluating the adaptability of an auxiliary fan, wherein the auxiliary fan is connected in series with a range hood through a smoke exhaust duct, and the method for evaluating the adaptability includes:

[0008] Acquire a first power and a gear position of the range hood when the auxiliary fan is turned off, and acquire a second power of the range hood when the auxiliary fan is turned on at the same gear position;

[0009] Obtaining a corresponding relationship between the range hood power and the air volume corresponding to the gear position;

[0010] A first air volume is calculated based on the first power and the corresponding relationship, and a second air volume is calculated based on the second power and the corresponding relationship;

[0011] If the judgment condition is met, the auxiliary fan meets the compatibility with the range hood.

[0012] Optionally, the corresponding relationship is obtained by measuring a range hood of the same model without an auxiliary fan.

[0013] Optionally, the judgment condition includes:

[0014] 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.

[0015] Optionally, the judgment condition also includes:

[0016] When the gear is a short-time upshift gear, the difference is greater than or equal to a preset third threshold;

[0017] The third threshold is smaller than the first threshold.

[0018] Optionally, the judgment condition also includes:

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

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

[0021] When the fluctuation is greater than or equal to the fourth threshold, if the auxiliary fan is an adjustable speed fan and the gear is at the highest speed gear and the difference is greater than or equal to the preset fifth threshold, the input power of the auxiliary fan is lowered, and whether the judgment condition is met is re-detected;

[0022] Wherein, the fifth threshold is greater than the first threshold.

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

[0024] The input power of the auxiliary fan is reduced according to a preset ratio, or the input power of the auxiliary fan is reduced according to a preset power increment.

[0025] The present disclosure also provides a smoke exhaust system, the smoke exhaust system comprising: a range hood and an auxiliary fan;

[0026] The air inlet of the auxiliary fan is connected to the air outlet of the range hood through a smoke exhaust duct;

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

[0028] The present disclosure also provides an electronic device, including a memory, a processor, and a computer program stored in the memory and used to run on the processor, and the processor implements the aforementioned auxiliary fan adaptability assessment method when executing the computer program.

[0029] The present disclosure also provides a computer program product, including a computer program, which implements the aforementioned auxiliary fan adaptability assessment method when executed by a processor.

[0030] On the basis of being in accordance with the common sense in the art, the above-mentioned preferred conditions can be arbitrarily combined to obtain the preferred embodiments of the present disclosure.

[0031] The positive progressive effect of the present disclosure is that by adaptability evaluating the performance of the auxiliary fan, the auxiliary fan that meets the adaptability requirements can reduce the exhaust resistance of the range hood in a high-resistance exhaust scenario, thereby avoiding a substantial increase in the range hood fan speed, and further avoiding a substantial increase in working noise, reducing the motor temperature rise, and increasing the service life of the range hood fan. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 A flowchart of a method for evaluating the adaptability of an auxiliary fan provided in Example 1 of the present disclosure;

[0033] Figure 2 A schematic diagram of a module of a smoke exhaust system provided in Example 2 of the present disclosure;

[0034] Figure 3 A schematic diagram of the structure of an electronic device provided in Embodiment 3 of the present disclosure. DETAILED DESCRIPTION

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

[0036] Prefixes such as "first" and "second" are used in the embodiments of the present disclosure only 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 prefixes such as ordinal numbers to distinguish description objects in the embodiments of the present disclosure does not constitute a limitation on the described objects. For the statement of the described objects, please refer to the description in the context of the claims or embodiments, and no unnecessary limitation should be constituted due to the use of such prefixes. In addition, in the description of the present embodiment, unless otherwise specified, the meaning of "plurality" is two or more.

[0037] Example 1

[0038] Figure 1 A flowchart of a method for evaluating the adaptability of an auxiliary fan provided by an exemplary embodiment of the present disclosure, wherein the auxiliary fan and the range hood are connected in series through a smoke exhaust duct, and the air inlet of the auxiliary fan is connected to the air outlet of the range hood. The method for evaluating the adaptability includes:

[0039] S11, obtaining a first power and a gear position of the range hood when the auxiliary fan is turned off, and obtaining a second power of the range hood when the auxiliary fan is turned on at the same gear position.

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

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

[0042] S14. If the judgment condition is met, the auxiliary fan meets the compatibility with the range hood.

[0043] Among them, complex fans with insufficient performance will increase the smoke exhaust resistance of the range hood. It is necessary to help users determine whether the duct fan they choose on the market can be installed as an auxiliary fan in the smoke exhaust system and adapt to the range hood in the current kitchen environment.

[0044] The adaptability problem means that not every auxiliary fan can help the range hood to exhaust smoke better. If the air volume (working air volume) of the auxiliary fan itself when the static pressure is 0 is lower than the working air volume expected to be achieved by the series system, according to the principle of conservation of mass: 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 done by the range hood. Therefore, in the above case, the addition of the auxiliary fan will instead lead to an increase in the rear end resistance of the range hood, and will not achieve the effect of auxiliary smoke exhaust.

[0045] The adaptive auxiliary fan can reduce the exhaust resistance at the rear end of the range hood and increase the ventilation volume 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 usage habits and still only needs to operate the range hood. The auxiliary fan will start and stop as the range hood is opened or closed.

[0046] Since changes in the resistance at the rear end of the range hood will cause changes in the power of the range hood, the degree of resistance change can be used to determine whether the auxiliary fan is working.

[0047] The operating power of the range hood in the following two different scenarios is required and compared to make a judgment:

[0048] Scenario 1: There is no auxiliary fan in the smoke exhaust system. At this time, only the smoke exhaust fan is used to resist the resistance of the flue.

[0049] Scenario 2: The auxiliary fan is connected to the smoke exhaust system and runs simultaneously with the smoke exhaust fan 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 an ammeter. Since the voltage is fixed, the power of the range hood can be calculated based on the current*voltage.

[0051] Each gear of the range hood corresponds to a corresponding relationship P=f(Q) between the range hood power P and the air volume 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 conditions are still not met, the auxiliary fan is not compatible with the range hood.

[0053] In this embodiment, the performance of the auxiliary fan is evaluated by adaptability, so that the auxiliary fan that meets the adaptability requirements can reduce the exhaust resistance of the range hood in a high-resistance exhaust scenario, thereby avoiding a substantial increase in the range hood fan speed, and further avoiding a substantial increase in 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 obtained by measuring the range hood of the same model without an auxiliary fan.

[0055] In one embodiment, the judgment conditions include:

[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] Among them, the range hood power P2 in scenario 2 is different from the range hood power P1 in scenario 1. After the auxiliary fan is connected and running, the rear end resistance of the range hood is reduced, and the air volume increases from Q1 to Q2, that is, f -1 (P2)-f -1 (P1) ≥ the first threshold, the purpose of which is to ensure that the increase in air volume achieved by the auxiliary fan is sufficient to significantly improve the smoking effect.

[0058] When the rear end resistance of the range hood is relatively large, the noise does not change significantly after the auxiliary fan is connected; otherwise, if the rear end resistance is not large and the auxiliary fan is still installed, the noise will increase significantly. The working air volume of the range hood decreases as the rear end resistance increases. So the working air volume f in scenario 1 -1 The smaller (P1) is, the more suitable it is to install an auxiliary fan; and after installing an auxiliary fan, the change in working air volume f -1 (P2)-f -1 The larger (P1) is, the higher the user tolerance is. Combining the above two points, we have the requirement: [f -1 (P2)-f -1 (P1)] / f -1 (P1)≥second threshold.

[0059] The first threshold and the second threshold can be set according to actual conditions. For example, the first threshold is set to 2m 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 a short-time up-speed gear, the difference is greater than or equal to a preset third threshold.

[0062] The third threshold is smaller than the first threshold.

[0063] Among them, the performance of the range hood in the short-time speed-up gear is higher than that in the highest speed gear. Therefore, for a specific fan, its auxiliary effect on 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 system must always be higher than the air volume of the series system in the highest speed gear.

[0064] This shows that as long as the requirements can be met at the highest speed, the air volume of the series system can also meet the requirements at the short-term speed increase.

[0065] But it is also necessary to satisfy f -1 (P2)-f -1 The reason why (P1) ≥ the third threshold is to ensure that the auxiliary fan still has a performance margin to avoid the situation in which the rear end resistance of the range hood is increased.

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

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

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

[0069] The power of the range hood and the auxiliary fan is a dynamic process during the startup period. Therefore, before comparing the power of the range hood before and after the series fan is connected, it is necessary to ensure that the value used for comparison and judgment is stable.

[0070] The startup period usually does not last long, so the stable value can be obtained quickly. However, if the auxiliary fan or the range hood has problems such as stall or surge, the series system will not be able to operate stably. The reason may not be due to the insufficient performance of the auxiliary fan, but it is also a manifestation of poor adaptability.

[0071] If it is impossible to obtain a range hood power value that meets the stability requirements, it is also determined that the auxiliary fan is not suitable for the range hood.

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

[0073] The preset time period can be set according to actual conditions. For example, the range hood power is tested every 3 seconds, and the duration of the preset time period is set to 15 seconds, and the average value can be calculated every 15 seconds.

[0074] In one embodiment, the suitability assessment method further includes:

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

[0076] Among them, the fifth threshold is greater than the first threshold.

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

[0078] In one embodiment, lowering the input power of the auxiliary fan includes:

[0079] The input power of the auxiliary fan is reduced according to a preset ratio, or the input power of the auxiliary fan is reduced according to a preset power increment.

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

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

[0082] Example 2

[0083] Figure 2 A module schematic diagram of a smoke exhaust system provided by an exemplary embodiment of the present disclosure, the system comprises: a range hood 1 and an auxiliary fan 2, wherein 0 represents a kitchen environment, and 4 represents an external environment.

[0084] The air inlet of the auxiliary fan 2 is connected to the air outlet of the range 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] Among them, various components are connected through smoke pipes, and the auxiliary fan and the smoke exhaust fan form a series relationship.

[0087] The range 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 requirements can reduce the exhaust resistance of the range hood in a high-resistance exhaust scenario, thereby avoiding a substantial increase in the range hood fan speed, and further avoiding a substantial increase in working noise, reducing the motor temperature rise, and increasing the service life of the range hood fan.

[0089] Example 3

[0090] Figure 3This is a structural schematic diagram of an electronic device shown in 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, and when the processor executes the computer program, the auxiliary fan adaptability assessment method described in any of the above embodiments is implemented. Figure 3 The electronic device 90 shown is only an example and should not bring any limitation to the functions and scope of use of the embodiments of the present disclosure.

[0091] like Figure 3 As shown, the electronic device 90 may be in the form of a general-purpose computing device, for example, it may be 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 the memory 92 and the processor 91).

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

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

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

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

[0096] The electronic device 90 may also communicate with one or more external devices 94 (e.g., keyboards, pointing devices, etc.). Such communication may be performed via an input / output (I / O) interface 95. Furthermore, the electronic device 90 may also communicate with one or more networks (e.g., local area networks (LANs), wide area networks (WANs), and / or public networks, such as the Internet) via a network adapter 96. As shown, the network adapter 96 communicates with other modules of the electronic device 90 via a bus 93. It should be understood that, although not shown in the figure, other hardware and / or software modules may be used in conjunction with the 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, etc.

[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, this division is merely exemplary and not mandatory. In fact, according to the embodiments of the present disclosure, the features and functions of two or more units / modules described above can be embodied in one unit / module. Conversely, the features and functions of one unit / module described above can be further divided into multiple units / modules to be embodied.

[0098] Example 4

[0099] The embodiments of the present disclosure further provide a computer program product, including a computer program, which, when executed by a processor, implements any of the above-mentioned methods for evaluating the adaptability of the auxiliary fan.

[0100] Among them, 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, and the program code can be executed completely on the user device, partially on the user device, as an independent software package, partially on the user device and partially on a remote device, or completely 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 example, and the protection scope of the present disclosure is defined by the appended claims. Those skilled in the art may make various changes or modifications to these embodiments without departing from the principles and essence of the present disclosure, but these changes and modifications all fall within the protection scope of the present disclosure.

Claims

1. A method for evaluating the adaptability of an auxiliary fan, characterized in that: The auxiliary fan and the range hood are connected in series via a smoke exhaust duct, and the adaptability evaluation method includes: Acquire a first power and a gear position of the range hood when the auxiliary fan is turned off, and acquire a second power of the range hood when the auxiliary fan is turned on at the same gear position; Obtaining a corresponding relationship between the range hood power and the air volume corresponding to the gear position; A first air volume is calculated based on the first power and the corresponding relationship, and a second air volume is calculated based on the second power and the corresponding relationship; If the judgment condition is met, the auxiliary fan meets the compatibility with the range hood.

2. The adaptability evaluation method of the auxiliary fan according to claim 1, characterized in that: The corresponding relationship is obtained by measuring the range hood of the same model without an auxiliary fan.

3. The adaptability evaluation method of the auxiliary fan according to claim 1, characterized in that: The judgment conditions include: 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.

4. The adaptability evaluation method of the auxiliary fan according to claim 3, characterized in that: The judgment conditions also include: When the gear is a short-time upshift gear, the difference is greater than or equal to a preset third threshold; The third threshold is smaller than the first threshold.

5. The adaptability evaluation method of the auxiliary fan according to claim 3, characterized in that: The judgment conditions also include: The fluctuation of the second power within a preset time period is less than a preset fourth threshold.

6. The adaptability evaluation method of the auxiliary fan according to claim 5, characterized in that: The adaptability assessment method further includes: When the fluctuation is greater than or equal to the fourth threshold, if the auxiliary fan is an adjustable speed fan and the gear is at the highest speed gear and the difference is greater than or equal to the preset fifth threshold, the input power of the auxiliary fan is lowered, and whether the judgment condition is met is re-detected; Wherein, the fifth threshold is greater than the first threshold.

7. The adaptability evaluation method of the auxiliary fan according to claim 6, characterized in that: The step of lowering the input power of the auxiliary fan comprises: The input power of the auxiliary fan is reduced according to a preset ratio, or the input power of the auxiliary fan is reduced according to a preset power increment.

8. A smoke exhaust system, characterized in that: The smoke exhaust system includes: a range hood and an auxiliary fan; The air inlet of the auxiliary fan is connected to the air outlet of the range hood through a smoke exhaust duct; The auxiliary fan is evaluated by the adaptability evaluation method for the auxiliary fan according to any one of claims 1 to 7 and meets the adaptability.

9. An electronic device comprising a memory, a processor, and a computer program stored in the memory and used to run on the processor, characterized in that: When the processor executes the computer program, the adaptability assessment method for the auxiliary fan according to any one of claims 1 to 7 is implemented.

10. A computer program product, comprising a computer program, characterized in that When the computer program is executed by a processor, the auxiliary fan adaptability assessment method according to any one of claims 1 to 7 is implemented.

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