Gas Purification Machine

Abstract

The present invention discloses a gas purification integrated machine, comprising an air intake unit, a power unit and an exhaust unit, wherein the power unit connects the air intake unit and the exhaust unit so that the gas purification integrated machine is cylindrical as a whole. The gas purification integrated machine of the present invention has the effects of small size, light weight, high efficiency, large air volume, simple and convenient installation and disassembly, and reduced noise. Moreover, the inverted T-shaped limitation of the traditional range hood "vertical column + horizontal wind collecting hood" is also lifted.

Description

Technical Field

[0001] The invention relates to a gas purification integrated machine, and in particular to an oil fume purification integrated machine. Background Art

[0002] As residents' income and consumption levels increase, their life concepts and health awareness increase, and their attention and requirements for indoor and outdoor environments are also increasing. Under the condition that the outdoor environment remains unchanged, the main sources of indoor pollution are harmful gases such as formaldehyde released by furniture, building materials, and architectural coatings, as well as particulate matter such as dust. However, harmful gases can be reduced or eliminated by purchasing high-quality building materials and coatings, and the impact of dust on the human body can be reduced by increasing indoor humidity and cleaning frequently. However, another source of indoor pollution, the kitchen, is often overlooked.

[0003] In the past, the fumes produced by cooking in the kitchen were not given enough attention. In recent years, with the improvement of living standards and cognitive levels, people have paid more and more attention to environmental protection and health issues in the kitchen. Due to the eating habits of Chinese people, the main source of pollution in the kitchen comes from the fume emissions when cooking. Therefore, the most direct way to eliminate kitchen fumes is to buy a range hood with strong suction power to eliminate the fumes produced by cooking as much as possible. Therefore, in recent years, the main features of the mainstream mid-to-high-end range hoods on the market are: strong suction and low noise; trying to increase the size of the range hood to meet the purpose of purifying fumes and reducing noise. At present, the main way for traditional range hood brands to increase the suction power of the range hood is to increase the size of the existing fan to increase the air extraction volume per unit time. However, the disadvantage of doing so is that it directly leads to the increasing size and weight of the range hood. At the same time, house construction requires weight reduction, and a large number of light walls are used. This means that when the weight of the range hood increases, the bearing capacity of the wall is decreasing, which makes the wall-mounted range hood a safety hazard. In addition, the huge size of the range hood occupies a large part of the kitchen space. Since the structure of the current traditional mainstream range hood is basically an inverted T-shaped structure of "vertical column + horizontal wind collection hood", the design of the kitchen interior decoration (such as cabinets, etc.) must accommodate the structure of the range hood, which greatly limits the flexibility and personalized development of kitchen decoration.

[0004] In summary, from the perspectives of market development needs, architectural development trends, and kitchen decoration, there are currently three main contradictions:

[0005] 1. Contradictions caused by market demand: As the suction power of the range hood increases, its weight also increases;

[0006] 2. Contradictions caused by the development trend of buildings: the contradiction between increasingly heavy range hoods and the decreasing bearing capacity of walls;

[0007] 3. Contradictions caused by kitchen decoration: the contradiction between the configuration of traditional range hoods and the needs of flexibility and personalized development.

[0008] Therefore, there is a demand for an all-in-one oil fume purification machine that can solve at least one of the above three contradictions. Summary of the invention

[0009] The above requirements are met by the integrated gas purifier according to the present invention. The integrated gas purifier according to the present invention is characterized in that it includes an air intake unit, a power unit and an exhaust unit, wherein the power unit connects the air intake unit and the exhaust unit so that the integrated gas purifier is cylindrical as a whole.

[0010] Preferably, the air intake unit allows gas to enter and is capable of filtering the gas.

[0011] Preferably, the power unit comprises a motor and a fan impeller, and the motor drives the fan impeller to rotate so as to draw gas into the air through the air intake unit.

[0012] Preferably, the exhaust unit is configured to completely exhaust the filtered gas back to the source of the gas before it enters the intake unit.

[0013] Preferably, the exhaust unit has an air outlet channel and a first-layer exhaust hole, and the air outlet channel is configured to allow a first portion of the filtered gas to be discharged through the first-layer exhaust hole.

[0014] Preferably, the first layer of exhaust holes is configured such that the first portion of the filtered gas is discharged in the form of a jet and the jet is at an angle to the horizontal plane.

[0015] Preferably, the exhaust unit also has a second layer of exhaust holes, and the air outlet channel is configured so that a second part of the filtered gas is discharged from the second layer of exhaust holes, wherein the second part is larger than the first part; and the second layer of exhaust holes is configured so that a discharge speed from the second layer of exhaust holes is lower than a discharge speed from the first layer of exhaust holes.

[0016] Preferably, the exhaust unit also has a third layer of exhaust holes, the air outlet channel is configured so that the third part of the filtered gas is discharged from the third layer of exhaust holes, and the third layer of exhaust holes is configured so that the third part of the filtered gas is discharged in the form of a jet and the jet forms a certain angle with the horizontal plane.

[0017] Preferably, the exhaust unit is configured to completely exhaust the filtered gas to the outside of a source of the gas before the gas enters the intake unit.

[0018] Preferably, the blade tips and blade roots of the fan impeller blades have different installation angles.

[0019] Compared with the fan for traditional range hoods, the present invention has the advantages of small size, light weight, high efficiency, large air volume, simple and convenient installation and disassembly, and reduced noise. Moreover, it also removes the inverted T-shaped limitation of the traditional range hood "vertical column + horizontal wind collecting hood", and can be integrated / personalized design of oil fume, purification, and kitchen. The kitchen does not need to dig a flue or install a smoke pipe, so as not to affect the overall design of the kitchen. The filter membrane can be replaced in time according to the actual use situation, and the used filter can be thrown away, which greatly improves the problem of secondary pollution of the range hood. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is an exploded view of the oil fume purification integrated machine of the present invention.

[0021] Figure 2 It is a side view of the oil fume purification integrated machine of the present invention (placed horizontally).

[0022] Figure 3 It is an axial cross-sectional view of the oil fume purification integrated machine of the present invention.

[0023] Figure 4 It is a perspective view of the power unit of the oil fume purification integrated machine of the present invention.

[0024] Figure 5 It is a front view of the exhaust outer cover and the exhaust top cover of the oil fume purification integrated machine of the present invention in an assembled state.

[0025] Figure 6 It is an exploded view of the air intake unit of the oil fume purification integrated machine of the present invention.

[0026] Figure 7 Schematic diagram of an embodiment of a fan impeller of the present invention. DETAILED DESCRIPTION

[0027] The oil fume purification integrated machine of the present invention is further described below with reference to the accompanying drawings and through embodiments.

[0028] like Figure 1 As shown, according to one embodiment of the present invention, the oil fume purification integrated machine includes a brushless DC motor 101, a fan impeller 103, a fan casing 105, an air intake front cover outer cover 107, an air intake front cover inner cover 109, a filter membrane 111, an air intake front cover outer cover magnetic sheet 113, an air intake front cover inner cover magnetic sheet 115, an exhaust outer cover 117, an exhaust outer cover inner fairing upper part 119, an exhaust outer cover inner fairing lower part 121, and an exhaust top cover 123.

[0029] Figure 2 After assembly Figure 1Front view of the all-in-one oil fume purification machine (placed horizontally). Figure 3 It is cut along the longitudinal axis Figure 2 The cross-sectional view of the oil fume purification machine shown in FIG. Figure 2 and Figure 3 It can be seen that the oil fume purification integrated machine according to the present invention is from left to right (see Figure 2 View) includes an intake unit, a power unit and an exhaust unit in sequence.

[0030] The air intake unit includes an air intake front cover outer cover 107, an air intake front cover inner cover 109 and a filter membrane 111. The air intake front cover outer cover 107 is generally a cylindrical shape with two ends open, and is provided with a plurality of holes for gas to flow in and reduce noise at the same time. The air intake front cover inner cover 109 is generally a bottomed cylindrical shape, and is provided with a plurality of holes on the side wall and the bottom wall of the cylinder for gas to flow in. Of course, the reverse is also possible, that is, the air intake front cover outer cover is generally a bottomed cylindrical shape, and the air intake front cover inner cover is generally a cylindrical shape with two ends open. The air intake front cover inner cover 109 also includes a connecting portion opposite to the bottom wall for, on the one hand, connecting the air intake front cover outer cover 107; on the other hand, connecting to the power unit. During assembly, the air intake front cover outer cover 107 is sleeved on the outside of the air intake front cover inner cover 109 and connected to the connecting portion of the air intake front cover inner cover 109. In a non-limiting preferred embodiment, the air intake front cover outer cover 107 is connected to the air intake front cover inner cover 109 by magnetic connection of the magnetic sheet 113 thereon and the magnetic sheet 115 on the air intake front cover inner cover 109. Of course, those skilled in the art can think of other suitable connection methods. In the assembled state, a filter membrane 111 is provided between the air intake front cover outer cover 107 and the air intake front cover inner cover 109 to filter the inhaled oil smoke. The filter membrane 111 is preferably oil smoke cotton. However, those skilled in the art can think of other suitable filter materials. Figure 6 An exploded view of the air intake unit is shown.

[0031] The power unit includes a brushless DC motor 101, a fan impeller 103 and a fan casing 105. The fan casing 105 coaxially holds the brushless DC motor 101 and the fan impeller 103 so that the brushless DC motor 101 can be directly connected to the fan impeller 103 and drive the fan impeller 103 to rotate in the fan casing 105. In the present invention, the motor can also be other types of motors, but must still meet the requirements of high power density. The outer surface of the fan casing 105 is provided with a connecting portion for engaging with the connecting portion of the air intake front cover inner cover 109 to connect the fan casing 105 with the air intake front cover inner cover 109. Preferably, the fan casing 105 is connected to the air intake front cover inner cover 109 by threads. Figure 4 A perspective view of the assembled power unit is shown. Figure 4As can be seen in the figure, the bracket of the fan casing 105 for supporting the brushless DC motor 101 includes a swept-back support structure, and the horizontal angle is preferably 60°. This swept-back design has a noise reduction effect. The blade roots and blade tips of the fan impeller 103 of the present invention adopt different twist angles (i.e., installation angles) and efficient blade shape design, so that under the condition of the same air volume, the overall size is smaller and the weight is lighter. Figure 7 , which shows an embodiment of a fan impeller 103. In this embodiment, the fan impeller 103 includes an impeller hub 103-1 and a plurality of blades 103-2. The plurality of blades 103-2 are attached to the impeller hub 103-1 at the blade root. The chord length of the blade tip section blade profile of the blade 103-2 is a preset value l, and the maximum thickness of the blade tip section blade profile is a preset value n; the chord length of the blade root section blade profile of the blade 103-2 is a preset value k, and the maximum thickness of the blade root section blade profile is a preset value e. Preferably, the blade 103-2 is configured so that l is less than k and n is less than e; and the chord length and maximum thickness of any section between the tip and the root are between l and k and between n and e, respectively. The number of blades of the fan impeller 103 depends on the air volume requirement, and preferably the number of blades is between 10 and 15. The installation angle of the blade can be calculated according to actual needs. Preferably, the installation angle of the blade can be determined as follows.

[0032]

[0033]

[0034] v 周向 =ωr

[0035] In the above formulas, S is the air flow area, unit: m 2 ; d is the diameter relative to the impeller axis, unit is m; V is the air flow (i.e. air volume), unit is m 3 / s; v is the air velocity, in m / s; ω is the fan rotation angular velocity, r is the radius relative to the impeller axis, in m. The subscript "exhaust" refers to the airflow discharged from the fan, and the subscript "circumferential" refers to the circumferential direction of the fan blade tip.

[0036] Preferably, the initial value of the angle of attack is selected to be zero, so that the installation angles of the blade root and the blade tip at zero angle of attack can be calculated as follows:

[0037]

[0038]

[0039] Among them, θ 叶尖_0 is the installation angle of the blade tip at zero angle of attack, θ 叶根_0is the installation angle of the blade root at zero angle of attack. The other variables and subscripts have the same meanings as above. By changing the value of the angle of attack in a certain step size, after multiple optimization iterations and adjustments of the installation angle of the blade tip and blade root, and considering the coupling effect between the installation angle and the above-mentioned swept back design, a reasonable installation angle range can be finally obtained. More preferably, the blade tip installation angle θ 叶尖 The range is 32°~38°; the blade root installation angle θ 叶根 The range is 51°~60°.

[0040] Through such a blade design, the fan efficiency can be improved by 6% under the same size and the same electrical power input; or, under the same size and electrical power input, the new configuration fan can increase the air volume by at least 6% compared with the traditional power fan.

[0041] The fan impeller 103 can be made of plastic, aluminum alloy and other materials, and processed by precision casting and other processes, which has the advantages of low cost and simple processing and manufacturing. Because it is integrally formed, there are no redundant parts.

[0042] The exhaust unit includes an exhaust outer cover 117 , an exhaust outer cover inner fairing upper part 119 , an exhaust outer cover inner fairing lower part 121 and an exhaust top cover 123 . Figure 5 The exhaust hood 117 and exhaust cap 123 are shown assembled together. Figure 5It can be seen that the exhaust outer cover 117 includes a constriction, a truncated cone-shaped expansion portion and a cylindrical portion from bottom to top. The constriction has a connection portion for connecting the exhaust unit to the connection portion of the outer surface of the fan casing 105, preferably by threaded connection, so as to connect the exhaust unit to the power unit. As a result, the connection portion of the outer surface of the fan casing 105 is simultaneously connected to the connection portion of the constriction and the connection portion of the air intake front cover inner cover 109, thereby forming a sealed connection between the exhaust outer cover 117 and the air intake front cover inner cover 109. A first layer of exhaust holes 501 is provided around the truncated cone-shaped expansion portion. A second layer of exhaust holes 503 is provided around the outer periphery of the cylindrical portion. In this embodiment, the second layer of exhaust holes is composed of four groups of exhaust holes evenly spaced apart in the circumferential direction. Each of the second layer of exhaust holes is formed as a rectangular slit hole elongated along the longitudinal axis direction of the exhaust unit. Preferably, each group of exhaust holes has 6 rectangular slit holes. Holes of other shapes are also feasible. In addition, it is conceivable that more or less than four groups of exhaust holes may be included, and each group of exhaust holes may include more or less than 6 rectangular slit holes. The exhaust top cover 123 is connected to the end of the exhaust cover 117 opposite to the constriction, and includes a third layer of exhaust holes 505. The third layer of exhaust holes is arranged around the side edge of the exhaust top cover 123, and each hole in the third layer of exhaust holes is configured to discharge gas in the form of a jet at a certain angle to the horizontal plane. In the embodiment shown for a smokeless duct, that is, the air after flowing through the oil fume purification integrated machine is directly discharged into the kitchen, and the exhaust top cover 123 basically closes the corresponding end of the exhaust cover 117, allowing only gas to be discharged from the third layer of exhaust holes. However, in an embodiment with a smoke duct, the exhaust top cover 123, the first to second layers of holes and the filter membrane 111 can be omitted.

[0043] Refer to Figure 3 The exhaust unit's exhaust hood inner fairing upper part 119 and exhaust hood inner fairing lower part 121 are fixed in the exhaust hood 117 so that together with the exhaust top cover 123, the air outlet channel of the oil fume purification integrated machine of the present invention is designed as a three-layer structure.

[0044] Among them, the lower fairing part 121 in the exhaust outer cover separates the first layer structure of the air outlet channel from the second layer structure of the air outlet channel. In the first layer structure of the air outlet channel, the gas passing through the fan impeller 103 is directly discharged from the first layer exhaust hole. One of the functions of the first layer exhaust hole is to discharge a part of the clean air that flows through the fan impeller 103 after purifying the oil fume, and the second function is to eject this part of the clean air in the form of a jet and at a certain angle to the horizontal plane, forming an air jet barrier to prevent the oil fume that is not sucked in from below from spreading upward and escaping, so that the oil fume that may spread and escape is sucked into the air intake front cover 107 again, so as to achieve the purpose of sucking out the oil fume as much as possible. Preferably, this part of clean air accounts for about 10% to 30% of the total amount of air flowing through the fan impeller 103. This volume flow ratio is achieved by designing the lower fairing part 121 in the exhaust outer cover.

[0045] The upper fairing part 119 in the exhaust outer cover separates the second layer structure of the air outlet channel from the third layer structure of the air outlet channel. The second layer structure of the air outlet channel is configured to guide a portion of the clean air to be discharged through the second layer exhaust holes. One of the functions of this layer of exhaust holes is to discharge part of the clean air flowing through the fan impeller 103; the second function is to blow directly at the person, so as to at least partially dispel the oil smoke overflowing to the person's face, and further keep the air in the local environment where the person breathes clean. Preferably, this part of the air flow accounts for about 50% to 80% of the total amount of air flowing through the fan impeller 103. The amount of air discharged from this layer of exhaust holes is relatively large, but because the second layer of exhaust holes has a larger opening area, the flow rate is relatively low to ensure that there is no discomfort when blowing on the face of the person.

[0046] The third layer structure of the air outlet passage is defined between the fairing upper part 119 in the exhaust outer cover and the exhaust top cover 123. The gas flowing through the third layer structure of the air outlet passage is discharged through the third layer exhaust hole. The gas discharged in this way has two functions: first, it discharges the remaining clean air flowing through the fan impeller 103; second, since it is discharged in the form of a jet, it further captures all possible overflowing oil smoke, so as to confine all the oil smoke near the air intake front cover, so that the oil smoke can be captured through the air intake front cover.

[0047] During operation, oil smoke enters through the air intake front cover outer cover 107, passes through the filter membrane 111, and the dirt in the oil smoke is adsorbed on the filter membrane 111, and then flows to the fan impeller 103 through the air intake front cover inner cover 109. In addition to the function of purifying oil smoke, this structure also has a good noise reduction effect due to the many holes.

[0048] Preferably, the oil fume purification integrated machine according to the present invention may also include other functions, such as lighting, filter membrane replacement reminder, intelligent control system, etc.

[0049] Compared with the traditional fan, the integrated oil fume purifier according to the present invention has a smaller size, lighter weight and lower noise while meeting the requirements of large suction. In addition, the integrated oil fume purifier according to the present invention is cylindrical as a whole, thereby eliminating the constraints brought by the inverted T-shaped design of the traditional range hood.

[0050] It can be known from the above disclosed contents that the integrated purification machine according to the present invention can be used not only in the field of kitchen fume purification, but also in other applications requiring gas purification.

[0051] The above is only a preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed by the present invention should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. A gas purification integrated machine, characterized in that: The invention comprises an air intake unit, a power unit and an exhaust unit, wherein the power unit connects the air intake unit and the exhaust unit so that the gas purification integrated machine is cylindrical as a whole; the exhaust unit is configured to completely discharge the filtered gas back to the source of the gas before entering the air intake unit; the exhaust unit has an air outlet channel and a first-layer exhaust hole, and the air outlet channel is configured to discharge a first part of the filtered gas through the first-layer exhaust hole; The first layer of exhaust holes is configured so that the first part of the filtered gas is discharged in the form of a jet and the jet forms a certain angle with the horizontal plane; the exhaust unit also has a second layer of exhaust holes, and the air outlet channel is configured so that the second part of the filtered gas is discharged from the second layer of exhaust holes, wherein the second part is larger than the first part; and the second layer of exhaust holes is configured so that the discharge speed from the second layer of exhaust holes is lower than the discharge speed from the first layer of exhaust holes; the exhaust unit also has a third layer of exhaust holes, the air outlet channel is configured so that the third part of the filtered gas is discharged from the third layer of exhaust holes, and the third layer of exhaust holes is configured so that the third part of the filtered gas is discharged in the form of a jet and the jet forms a certain angle with the horizontal plane.

2. The gas purification integrated machine according to claim 1, characterized in that: The air intake unit allows gas to enter and is capable of filtering the gas.

3. The gas purification integrated machine according to claim 1, characterized in that: The power unit includes a motor and a fan impeller, and the motor drives the fan impeller to rotate to draw gas through the air intake unit.

4. The gas purification integrated machine according to claim 1, characterized in that: The exhaust unit is configured to completely exhaust the filtered gas to the outside of a source of the gas before the gas enters the intake unit.

5. The gas purification integrated machine according to claim 3, characterized in that: The blade tips and blade roots of the fan impeller blades have different installation angles.

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