Fan system of air conditioner and lampblack all-in-one machine and control method of fan system

Abstract

According to the draught fan control system based on the oil fume amount and the working method thereof, the working environment of an air conditioner and oil fume all-in-one machine in the daily use process is not always in a large-oil-fume environment, when the oil fume amount is large, oil fume needs to fully pass through a filtering layer to adsorb large and small molecules in the oil fume, and when the oil fume amount is small, the oil fume needs to fully pass through the filtering layer to adsorb large and small molecules in the oil fume. In the prior art, the air conditioner and oil smoke all-in-one machine still needs to be started to achieve cooling circulation of indoor air, and at the moment, a filter material can block airflow pumped by a fan, so that the circulation efficiency is reduced. According to the draught fan control system based on the oil smoke amount and the working method of the draught fan control system, a sensor is arranged in an equipment oil smoke channel to detect the molecular weight in the oil smoke, and when it is judged that the oil smoke amount is smaller than a threshold value, the rotating speed of a draught fan is increased to suck a light filter material from a mounting frame, so that the filter material is kept in a suspended state; therefore, the air can pass through the oil smoke channel more smoothly, and the indoor air circulation efficiency is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of equipment control, and in particular to a fan system of an air-conditioner and range hood integrated machine and a control method thereof. Background Art

[0002] The kitchens of the catering service industry usually need to install air conditioners and range hoods to reduce the high temperature and oil smoke generated by multiple stoves. However, the oil smoke emitted by the catering service industry is a complex organic waste gas with a large air volume, low concentration, oily sticky particles, and high water vapor. On the one hand, oil stains are very easy to adhere to the air conditioner, resulting in a decrease in the cooling effect. On the other hand, the range hood will take away the cold air when discharging the oil smoke through the pipe, increasing the energy consumption of the air conditioner.

[0003] Therefore, the air conditioner and range hood integrated machine based on the condensation principle has emerged. It condenses the air, condenses and removes large oil molecules, and at the same time cools the air, so that the indoor air can be circulated internally.

[0004] Since the contact time between air and the condensation component is short, some oil fume molecules will continue to rise. In order to prevent oil fume molecules from entering the air circulation path, a filter plate is usually set on the path to further remove oil molecules. However, in daily use, the working environment is not always in a large amount of oil fume. When the amount of oil fume is large, the oil fume needs to fully pass through the filter layer to absorb large and small molecules in the air. When the amount of oil fume is small and the air-conditioning oil fume integrated machine still needs to be turned on to realize the cooling circulation of indoor air, the filter material will block the airflow drawn by the fan, resulting in reduced circulation efficiency. Summary of the invention

[0005] In view of the shortcomings of the prior art, the present invention proposes a fan system for an air-conditioning and range hood integrated machine and a control method thereof, which can automatically increase the fan speed according to the amount of indoor oil smoke to suck up the lighter filter material from the mounting frame and keep it in a suspended state, thereby allowing air to pass through the oil smoke channel more smoothly, thereby improving the indoor air circulation efficiency and reducing energy consumption.

[0006] The present invention proposes a fan system for an air-conditioning and range hood integrated machine, comprising a shell, an air suction channel formed in the shell, a fan is provided at the upper end of the air suction channel, a condensing device is provided at the bottom of the air suction channel, a supporting edge is provided on the inner side wall of the air suction channel, at least one filter plate is mounted on the supporting edge, the area of ​​the filter plate is smaller than the cross-sectional area of ​​the air suction channel, a gravity sensor is provided on the supporting edge, and an oil fume sensor is provided between the filter plate and the condensing device.

[0007] A second aspect of the present invention provides a control method for the fan system as described above, comprising the following steps:

[0008] Obtaining the power information of the fan and the cross-sectional area of ​​the air suction channel, and constructing a force curve of the filter plate under different air volumes;

[0009] Acquire first weight information of the filter plate in an initial state and calculate a critical force value of the filter plate in a suspended state, and acquire the suspension power corresponding to the fan according to the critical force value;

[0010] In response to a power-on signal, collecting the oil smoke concentration information inside the air suction channel and the second weight information of the filter plate, and calculating the compensation power according to the second weight information;

[0011] Determine whether the oil fume concentration is greater than a preset oil fume threshold. When the oil fume concentration is greater than the oil fume threshold, control the fan to output at normal power; when the oil fume concentration is less than the oil fume threshold, control the fan to output at the sum of the suspension power and the compensation power.

[0012] A further technical solution of the embodiment of the present invention is that when the power information of the fan and the cross-sectional area of ​​the air suction channel are obtained and the force curve of the filter plate under different air volumes is constructed, it also includes:

[0013] The exhaust speed V of the fan at different powers is obtained, and the wind pressure generated by the fan is calculated according to the following formula:

[0014]

[0015] Among them, p d is the wind pressure, ρ is the air density, v is the wind speed in the air suction channel, Q is the current air volume of the fan, and A is the cross-sectional area of ​​the air suction channel;

[0016] The windward area S of the filter plate is obtained, and the first suction force F exerted on the filter plate is calculated according to the following formula:

[0017]

[0018] The force curve of the filter plate is established with the air volume Q as the horizontal axis and the first suction force F as the vertical axis.

[0019] A further technical solution of an embodiment of the present invention is that the first weight information of the filter plate in the initial state is obtained and the critical force value of the filter plate in the suspended state is calculated, and the suspension power corresponding to the fan is obtained according to the critical force value, and further includes:

[0020] The upward displacement distance of the filter plate when suspended is preset to be x, and the second suction force F' required for the filter plate to be in a suspended state after the filter plate is displaced upward by x is calculated;

[0021] The corresponding air volume Q is obtained according to the second suction force F' and the force curve, and the fan is controlled to output at the corresponding power.

[0022] A further technical solution of the embodiment of the present invention is that at least three oil fume sensors are arranged at intervals in the air suction channel to collect oil fume information inside the oil fume channel, and further includes:

[0023] The oil fume sensor collects oil fume concentrations at at least three locations, and an average value of the oil fume concentrations at at least three locations collected is used as the oil fume concentration information in the air suction channel.

[0024] A further technical solution of the embodiment of the present invention is that wind speed sensors are provided on the upper side and the lower side of the filter plate, and further includes:

[0025] The first wind speed and the second wind speed at both ends of the filter plate are collected, and the difference between the first wind speed and the second wind speed is calculated. When the difference is greater than a threshold of a preset value, the fan performs an air volume increase operation.

[0026] A further technical solution of the embodiment of the present invention is to calculate the compensation power according to the second weight information; and further include:

[0027] The second weight information of the filter plate is collected, the difference between the second weight information and the first weight information is calculated, and the compensation power is calculated according to the difference.

[0028] A further technical solution of the embodiment of the present invention is that it also includes:

[0029] When the second weight information is higher than a preset replacement threshold, a consumable replacement warning is issued.

[0030] A further technical solution of the embodiment of the present invention is that it also includes:

[0031] The temperature information of the condensing plate is obtained, and when the temperature information enters a preset temperature range, the fan is restricted to output at normal power.

[0032] A further technical solution of the embodiment of the present invention is that the selection of the temperature range further includes:

[0033] The condensation efficiency of oil smoke at different temperatures is obtained through experiments, and the temperature value when the condensation efficiency is 80% is used as the dividing point to divide the temperature of the condensation plate into at least two intervals.

[0034] Compared with the prior art, the present invention has the following advantages:

[0035] The embodiment of the present invention obtains accurate suspension by setting a sensor in the oil fume passage of the equipment to detect the molecular weight in the oil fume through pre-inputting the effect of the suction generated by the fan with different powers on the filter plate. When it is judged that the amount of oil fume is less than the threshold value, the fan speed is increased to suck up the lighter filter material from the mounting frame to keep it in a suspended state, thereby allowing the air to pass through the oil fume passage more smoothly and improving the indoor air circulation efficiency.

[0036] In addition, during daily use, oil smoke will be adsorbed on the filter plate, causing the weight of the filter plate to increase. The fan is made to further output compensation power to ensure that the filter plate can still be suspended under different weights. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0038] Figure 1 A schematic flow chart of a method for controlling a fan system of an air-conditioning and range hood integrated machine according to an embodiment of the present invention;

[0039] Figure 2 It is a schematic diagram of the process of obtaining the force curve in the present invention. DETAILED DESCRIPTION

[0040] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0041] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", "third", "fourth", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0042] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0043] See also Figure 1 to Figure 2 An embodiment of the present invention discloses a fan system of an air conditioner and a range hood integrated machine, comprising a shell, an air suction channel formed in the shell, a fan is provided at the upper end of the air suction channel, a condensing device is provided at the bottom of the air suction channel, a supporting edge is provided on the inner side wall of the air suction channel, at least one filter plate is mounted on the supporting edge, the area of ​​the filter plate is smaller than the cross-sectional area of ​​the air suction channel, a gravity sensor is provided on the supporting edge, and a fume sensor is provided between the filter plate and the condensing device.

[0044] Specifically, the air suction channel can be vertical or inclined. In this embodiment, the air suction channel is preferably vertical up and down to ensure that the suction force generated by the fan on the filter plate in the air suction channel is opposite to the weight of the fan itself. Since the area of ​​the filter plate is smaller than the cross-sectional area of ​​the air suction channel, when the filter plate is placed on the supporting edge, the oil fume air rising from the bottom must pass through the filter plate. When the filter plate is suspended in the air suction channel, the gap between the filter plate and the supporting edge can allow air to pass quickly, thereby reducing obstruction.

[0045] In order to achieve suspension of the filter plate, the second aspect of the present invention proposes a control method applied to the fan system as described above, comprising the following steps:

[0046] 101. Obtaining power information of the fan and the cross-sectional area of ​​the air suction channel, and constructing a force curve of the filter plate under different air volumes;

[0047] Specifically, when the power information of the fan and the cross-sectional area of ​​the air suction channel are obtained and the force curve of the filter plate under different air volumes is constructed, the method further includes:

[0048] The exhaust speed V of the fan at different powers is obtained, and the wind pressure generated by the fan is calculated according to the following formula:

[0049]

[0050] Among them, p d is the wind pressure, ρ is the air density, v is the wind speed in the air suction channel, Q is the current air volume of the fan, and A is the cross-sectional area of ​​the air suction channel;

[0051] Those skilled in the art will know that the air volume of a fan can be obtained based on the performance parameters of the fan or actual measurements. If the air volume is not directly given, it can be estimated by parameters such as the fan speed and impeller diameter. In actual production, fan manufacturers usually provide fan-related instruction documents for reference, and obtain different air volumes corresponding to different fan speeds at different powers through experiments.

[0052] The windward area S of the filter plate is obtained, and the first suction force F exerted on the filter plate is calculated according to the following formula:

[0053]

[0054] The force curve of the filter plate is established with the air volume Q as the horizontal axis and the first suction force F as the vertical axis.

[0055] Among them, in this embodiment, the windward area of ​​the filter plate is maximized by vertically arranging the air suction channel, which can effectively utilize the vertical suction force generated by the fan on the filter plate and reduce the energy consumption of the equipment.

[0056] 102 obtains first weight information of the filter plate in an initial state and calculates a critical force value of the filter plate in a suspended state, and obtains the corresponding suspension power of the fan according to the critical force value;

[0057] Specifically, obtaining the suspension power includes the following steps:

[0058] The upward displacement distance of the filter plate when suspended is preset to be x, and the second suction force F' required for the filter plate to be in a suspended state after the filter plate is displaced upward by x is calculated;

[0059] Among them, the upward displacement distance is preferably 1cm to 5cm. Those skilled in the art can understand that in order to make the filter plate rise, the second suction force F' is greater than the first suction force F and needs to be obtained through multiple experiments. When the suction force of the fan increases, the filter plate moves upward at a uniform speed under the combined action of the second suction force F', air resistance and gravity and finally floats still.

[0060] The corresponding air volume Q is obtained according to the second suction force F' and the force curve, and the fan is controlled to output at the corresponding power.

[0061] Among them, since the power information of the fan has been obtained, after determining the air volume Q corresponding to the second suction force through the force curve, the corresponding power can be quickly queried and output.

[0062] 103, in response to the power-on signal, collecting the oil smoke concentration information inside the air suction channel and the second weight information of the filter plate, and calculating the compensation power according to the second weight information;

[0063] Specifically, at least three oil fume sensors are arranged at intervals in the air suction channel, and the oil fume sensors collect oil fume concentrations at at least three locations, and an average value of the collected oil fume concentrations at at least three locations is used as the oil fume concentration information in the air suction channel.

[0064] Since the range hood absorbs a large amount of oil smoke in daily use, a large amount of oil stains will accumulate on the filter plate. The oil stains will not only further block the air from passing through the filter plate, but also increase the weight of the filter plate, resulting in the fan being unable to suck up the filter plate when outputting the preset suspension power. Therefore, this embodiment proposes calculating the compensation power according to the second weight information, and further includes:

[0065] The second weight information of the filter plate is collected, the difference between the second weight information and the first weight information is calculated, and the compensation power is calculated according to the difference.

[0066] Among them, since the weight of the oil pollution usually has little effect, calculating the compensation power by difference method can improve the accuracy of the oil pollution weight measurement, thereby outputting the required compensation power more precisely.

[0067] 104 determines whether the oil smoke concentration is greater than a preset oil smoke threshold. When the oil smoke concentration is greater than the oil smoke threshold, the fan is controlled to output at normal power; when the oil smoke concentration is less than the oil smoke threshold, the fan is controlled to output at the sum of the suspension power and the compensation power.

[0068] Specifically, normal power refers to the power at which the fan can normally perform oil fume purification operations and will not suck up the condensation plate. The setting of the oil fume concentration threshold can be set according to actual needs.

[0069] In this embodiment, in order to more accurately detect whether the air in the air duct is unobstructed, at least one wind speed sensor is provided on the upper and lower sides of the filter plate, and the first wind speed and the second wind speed on the upper and lower sides of the filter plate are respectively collected by the wind speed sensor, and the difference between the first wind speed and the second wind speed is calculated. When the difference is greater than a threshold value of a preset value, the fan performs an air volume increase operation. When the difference between the first wind speed and the second wind speed is too large, it can be determined that the filter plate is not in a suspended state, and the filter plate is sucked up by increasing the air volume of the fan.

[0070] Specifically, the air volume increase operation is to increase the power of the fan according to a preset value to increase the fan speed, thereby increasing the air volume output by the fan. Those skilled in the art can know that the precondition for the air volume increase operation is that the oil smoke concentration is also less than the oil smoke threshold to prevent the oil smoke from directly entering the circulation channel.

[0071] Preferably, in this embodiment, when the second weight information is higher than a preset replacement threshold, it can be determined that a large amount of oil has accumulated on the filter plate. At this time, the filtering effect of the filter plate is greatly weakened, and a consumable replacement warning is issued to prompt the user to replace consumables to maintain the oil fume filtering effect.

[0072] In this embodiment, preferably, the temperature information of the condensing plate is obtained, and when the temperature information enters a preset temperature range, the fan is limited to output at normal power. Since the temperature of the condensing plate is related to the temperature of the indoor internal circulation, the temperature of the condensing plate will rise after the user adjusts the temperature. At the same time, when the condensing plate is in use, it is affected by oil stains and the high-temperature oil smoke air below, and the temperature rises further, resulting in the inability to fully condense the oil smoke passing through. Therefore, when the temperature reaches a certain threshold, ensuring that the fan outputs at normal power can prevent the filter plate from floating and rising, causing the oil smoke to enter the indoor circulation.

[0073] Specifically, the selection of the temperature interval includes the following steps:

[0074] The condensation efficiency of oil smoke at different temperatures is obtained through experiments, and the temperature value when the condensation efficiency is 80% is used as the dividing point to divide the temperature of the condensation plate into at least two intervals. It is known to those skilled in the art that as the temperature rises, the condensation efficiency decreases, so the high temperature interval is selected as the value for limiting the fan.

[0075] The embodiment of the present invention obtains accurate suspension by setting a sensor in the oil fume passage of the equipment to detect the molecular weight in the oil fume through pre-inputting the effect of the suction generated by the fan with different powers on the filter plate. When it is judged that the amount of oil fume is less than the threshold value, the fan speed is increased to suck up the lighter filter material from the mounting frame to keep it in a suspended state, thereby allowing the air to pass through the oil fume passage more smoothly and improving the indoor air circulation efficiency.

[0076] In addition, during daily use, oil smoke will be adsorbed on the filter plate, causing the weight of the filter plate to increase. The fan is made to further output compensation power to ensure that the filter plate can still be suspended under different weights.

[0077] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A fan system for an air conditioner and range hood, comprising a housing, a suction channel formed in the housing, a fan disposed at the upper end of the suction channel, and a condensing device disposed at the bottom of the suction channel, characterized in that: A supporting edge is provided on the inner wall of the suction channel, at least one filter plate is mounted on the supporting edge, the area of ​​the filter plate is smaller than the cross-sectional area of ​​the suction channel, a gravity sensor is provided on the supporting edge, and an oil fume sensor is provided between the filter plate and the condensing device.

2. A control method for a fan system according to claim 1, characterized in that: The following steps are involved: Obtaining the power information of the fan and the cross-sectional area of ​​the air suction channel, and constructing a force curve of the filter plate under different air volumes; Acquire first weight information of the filter plate in an initial state and calculate a critical force value of the filter plate in a suspended state, and acquire the suspension power corresponding to the fan according to the critical force value; In response to a power-on signal, collecting the oil smoke concentration information inside the air suction channel and the second weight information of the filter plate, and calculating the compensation power according to the second weight information; Determine whether the oil fume concentration is greater than a preset oil fume threshold. When the oil fume concentration is greater than the oil fume threshold, control the fan to output at normal power; when the oil fume concentration is less than the oil fume threshold, control the fan to output at the sum of the suspension power and the compensation power.

3. The control method according to claim 2, characterized in that: When the power information of the fan and the cross-sectional area of ​​the air suction channel are obtained and the force curve of the filter plate under different air volumes is constructed, the method further includes: The exhaust speed V of the fan at different powers is obtained, and the wind pressure generated by the fan is calculated according to the following formula: Among them, p d is the wind pressure, ρ is the air density, v is the wind speed in the air suction channel, Q is the current air volume of the fan, and A is the cross-sectional area of ​​the air suction channel; The windward area S of the filter plate is obtained, and the first suction force F exerted on the filter plate is calculated according to the following formula: The force curve of the filter plate is established with the air volume Q as the horizontal axis and the first suction force F as the vertical axis.

4. The control method according to claim 2, characterized in that: The step of obtaining the first weight information of the filter plate in the initial state and calculating the critical force value of the filter plate in the suspended state, and obtaining the suspension power corresponding to the fan according to the critical force value, further includes: The upward displacement distance of the filter plate when suspended is preset to be x, and the second suction force F' required for the filter plate to be in a suspended state after the filter plate is displaced upward by x is calculated; The corresponding air volume Q is obtained according to the second suction force F' and the force curve, and the fan is controlled to output at the corresponding power.

5. The control method according to claim 2, characterized in that: At least three of the oil fume sensors are arranged at intervals in the air suction channel to collect oil fume information inside the oil fume channel, and further include: The oil fume sensor collects oil fume concentrations at at least three locations, and an average value of the collected oil fume concentrations at at least three locations is used as the oil fume concentration information in the air suction channel.

6. The control method according to claim 2, characterized in that: Wind speed sensors are arranged on the upper and lower sides of the filter plate, and further include: The first wind speed and the second wind speed at both ends of the filter plate are collected, and the difference between the first wind speed and the second wind speed is calculated. When the difference is greater than a threshold of a preset value, the fan performs an air volume increase operation.

7. The control method according to claim 2, characterized in that: Calculating the compensation power according to the second weight information; and further comprising: The second weight information of the filter plate is collected, the difference between the second weight information and the first weight information is calculated, and the compensation power is calculated according to the difference.

8. The control method according to claim 2, characterized in that: Also includes: When the second weight information is higher than a preset replacement threshold, a consumable replacement warning is issued.

9. The control method according to claim 2, characterized in that: Also includes: The temperature information of the condensing plate is obtained, and when the temperature information enters a preset temperature range, the fan is restricted to output at normal power.

10. The control method according to claim 9, characterized in that: The selection of the temperature range also includes: The condensation efficiency of oil smoke at different temperatures is obtained through experiments, and the temperature of the condensation plate is divided into at least two intervals with the temperature value when the condensation efficiency is 80% as the dividing point.

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