CN111855893B - Air quality detection device - Google Patents
Air quality detection device Download PDFInfo
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- CN111855893B CN111855893B CN201910349445.3A CN201910349445A CN111855893B CN 111855893 B CN111855893 B CN 111855893B CN 201910349445 A CN201910349445 A CN 201910349445A CN 111855893 B CN111855893 B CN 111855893B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/0004—Gaseous mixtures, e.g. polluted air
- G01N33/0009—General constructional details of gas analysers, e.g. portable test equipment
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating
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Abstract
The invention relates to an air quality detection device, which comprises a shell, wherein the interior of the shell is divided into an air inlet area close to the bottom of the shell, an air outlet area close to the top of the shell and an air flow channel for communicating the air inlet area and the air outlet area; the air inlet group is arranged on the shell and is close to the bottom of the shell, and at least comprises a first air hole and a second air hole which are respectively communicated with the air inlet area, the distance between the first air hole and the top of the shell is larger than the distance between the second air hole and the top of the shell, and the area of the air hole allowing air to pass through of the first air hole is larger than the area of the air hole allowing air to pass through of the second air hole; the exhaust port group is arranged on the shell, is adjacent to the top of the shell and is communicated with the exhaust area; the air quality detection module is fixedly arranged in the shell and driven to act so as to detect air components; when the air quality detection module acts to generate heat energy, the heat energy enables the air in the shell to be heated, the flow rate of the air passing through the first air hole is smaller than that of the air passing through the second air hole, and the heated air naturally rises, flows to the air exhaust area through the air flow channel and flows out of the shell from the air exhaust port group.
Description
Technical Field
The present invention relates to an air quality detection device, and more particularly, to an air quality detection device capable of achieving air circulation and convection inside a machine body without using a fan.
Background
With the development of industry and the increase of population, air pollution is becoming more and more serious, and the real-time monitoring of air quality becomes more and more important, and a plurality of air quality improving products appear on the market, such as: although some air quality improving products have built-in detectors, the air quality improving products are limited by volume, weight and power supply configuration, and the products of the type cannot perform comprehensive detection and state display aiming at the air quality at will. Accordingly, related air quality monitoring products are also emerging as a function of demand.
The existing air quality monitor generally includes a fan to enhance the air circulation inside the machine body. For example, an air quality monitor is disclosed in chinese patent application No. 201420357615.5 entitled "air detector". This patent discloses an air detector, including having open-ended casing 1000, casing 1000 indent is equipped with air inlet cavity 1100, and air inlet cavity 1100's bottom is seted up with external communicating air intake 1200, is provided with a frame seat 3000 in the casing 1000, and frame seat 3000 is formed with the clearance that is used for the air-out with the open end of casing 1000 to the messenger flows from this clearance from the oral siphon that air intake 1200 got into. The rack seat 3000 is provided with a core assembly for detecting and analyzing air quality and a battery 4000 for supplying power, the core assembly comprises a detection assembly, and the detection assembly comprises an air supply assembly 2110 and an air detection assembly arranged adjacent to the air supply assembly 2110. The air supply assembly 2110 comprises a fan 2111 and a fan seat 2112 for installing and supporting the fan 2111, the fan 2111 is powered by the battery 4000, the fan 2111 rotates, air flows in from the air inlet 1200, is blown by the fan 2111 and is conveyed to the air detection assembly for corresponding detection.
The problem of above-mentioned structure lies in, will produce the noise when the fan operation, is being used for air monitor real-time supervision, and the volume of its background operation will cause the influence to the user, and the fan power consumption is great, and the user must pay attention to the electric quantity constantly whether sufficient, moreover, if the fan has to some extent to damage or when breaking down, its change and the not ordinary user know or can't change even for when the fan damages, air monitor wholly will not normally operate.
Therefore, how to provide a silent, low-power consumption and stable air quality monitor, so that the user cannot feel the product operation when the air quality monitor operates in the background, the power consumption is reduced, and the overall operation is stable, is a problem to be overcome urgently.
Disclosure of Invention
In view of the above-mentioned problems, the present invention provides an air quality detecting device capable of achieving air circulation and convection inside a machine body without a fan, so as to solve the problems of noise, energy consumption and instability caused by the fan.
According to the objective of the present invention, an air quality detecting device is provided, which comprises a housing, wherein the housing is hollow and is divided into an air inlet area, an air outlet area and an air flow channel for communicating the air inlet area and the air outlet area, the air inlet area is close to the bottom of the housing, the air outlet area is close to the top of the housing, and the air flow channel is arranged between the air inlet area and the air outlet area; the air inlet group is arranged on the shell and is adjacent to the bottom of the shell, and the air inlet group at least comprises a first air hole and a second air hole which are respectively communicated with the air inlet area, so that external environment air can enter the air inlet area through the first air hole and the second air hole; the distance between the first air hole and the top of the shell is larger than that between the second air hole and the top of the shell, and the area of the air hole allowing air to pass through of the first air hole is larger than that of the air hole allowing air to pass through of the second air hole; the exhaust port group is arranged on the shell and is close to the top of the shell, and the exhaust port group is communicated with the exhaust area, so that the air in the exhaust area can flow out of the shell through the exhaust port group; the air quality detection module is fixedly arranged in the shell and is adjacent to the air inlet area and the airflow channel in the shell, and the air quality detection module is driven to act so as to detect the air components passing through the air quality detection module; when the air quality detection module acts to generate heat energy, the heat energy enables the air entering the shell through the first air hole and the second air hole to be heated, and the flow rate of the air passing through the first air hole is smaller than that of the air passing through the second air hole; the air after temperature rise naturally rises to flow to the air exhaust area through the air flow channel and flows out of the shell from the air exhaust port group.
Preferably, in the air quality detecting apparatus, a total area of the air inlet set allowing air to pass through is 2-4 times a total area of the air outlet set allowing air to pass through.
Preferably, in the air quality detection apparatus, the number of the air inlet groups is two, and the two air inlet groups are respectively disposed at two opposite sides of the housing, so that the first air inlet and the second air inlet of the two air inlet groups are oppositely disposed and respectively communicated with the air intake area, and external ambient air can enter the air intake area through the first air inlet and the second air inlet of each air inlet group.
Preferably, in the air quality detection apparatus, the air inlet set further includes a third air hole, a distance between the third air hole and the top of the housing is smaller than a distance between the second air hole and the top of the housing, and an area of the third air hole allowing air to pass through is smaller than an area of the second air hole allowing air to pass through.
Preferably, in the air quality detecting apparatus, a flow rate of the air passing through the first air hole is smaller than a flow rate of the air passing through the second air hole, so that a region of the air inlet region adjacent to the first air hole forms a relatively high pressure region, and a region of the air inlet region adjacent to the second air hole forms a relatively low pressure region, and further the air passing through the first air hole pushes the air passing through the second air hole and located in the relatively low pressure region from the relatively high pressure region, so as to accelerate the air located in the relatively low pressure region to enter the airflow channel and flow to the air exhaust region, and then flow out of the housing from the air outlet set.
Preferably, in the air quality detection apparatus, a maximum aperture of the second air hole of the air inlet set is 40% to 90% of a maximum aperture of the first air hole.
Preferably, in the air quality detection apparatus, the first air hole has an oblong shape or a circular shape.
Preferably, in the air quality detecting apparatus, the air quality detecting module at least includes one or a combination of a dust detecting element, a formaldehyde detecting element, a carbon monoxide detecting element, a VOC detecting element, and a temperature/humidity detecting element.
Preferably, in the air quality detecting apparatus, when the number of the detecting elements of the air quality detecting module is equal to or greater than two, the positions of the detecting elements inside the casing are arranged according to the size of the heat generated by the respective operations, and the detecting element with the larger generated heat is disposed above the detecting element with the smaller generated heat.
Preferably, in the air quality detection apparatus, a temperature/humidity detection element of the air quality detection module is adjacent to the air inlet set to detect air flowing from the air inlet set.
Preferably, the air quality detection device further comprises a power supply module, and the power supply module drives the air quality detection module to operate; the power supply module at least comprises a battery or a USB interface which can be connected with an external power supply.
Preferably, the air quality detection apparatus further includes a display element, the display element is connected to the air quality detection module, and at least a portion of the display element is exposed outside the housing to display the air quality status.
Preferably, the air quality detecting device further includes a control component, the control component is connected to the air quality detecting module, and at least a portion of the control component is exposed outside the housing to control the operation of the air quality detecting module.
As described above, the air quality detection apparatus according to the present invention has the following advantages:
(1) the setting of the fan is cancelled, the self heating of the air detection module and the configuration relation of each detection element are adopted, the convection velocity of air flow in the machine body is further accelerated, the air circulation is increased, and meanwhile, the noise is reduced and the operation stability of the detection device is improved.
(2) The air inlet is optimized, the aperture of the air inlet is gradually reduced from bottom to top, so that pressure difference is generated in the area, adjacent to the air inlet, of the machine body, air flow in the area of the air inlet tends to flow upwards, the air flow traction speed is increased, the whole air inlet can uniformly and effectively enter air, and the air flow and the detection effect of the air detection module are promoted.
Drawings
Fig. 1 is a schematic perspective view of an air quality detection apparatus according to the present invention.
Fig. 2 is a perspective view of the air quality detecting apparatus of fig. 1 from another perspective.
Fig. 3 is an exploded perspective view of the air quality detecting apparatus of fig. 1.
Fig. 4 is a perspective view of the air quality detecting apparatus with the front case removed.
Fig. 5 is a side view of the base.
Fig. 6 is a cross-sectional view taken along line X-X of the air quality detecting apparatus of fig. 4.
Fig. 7 is an enlarged view of a portion a of fig. 6.
Fig. 8 is a schematic perspective view of an air quality detecting apparatus according to another embodiment of the invention.
Fig. 9 is an exploded perspective view of the air quality detecting device of fig. 8.
Fig. 10 is a perspective view of the air quality detecting apparatus of fig. 8 with a front case removed.
Fig. 11 is a cross-sectional view of the air quality detecting apparatus of fig. 8 taken along the line Y-Y.
[ description of symbols ]
1. 1' air quality detection device
10. 10' shell
10a, 10a ' front shell 10b, 10b ' rear shell 10c, 10c ' base
11. 11' air intake zone
12. 12' air flow channel
13. 13' exhaust area
20. 20' air inlet group
21. 21' first air inlet group
L1 first layer 211, 211' first air hole R1 Aperture
L2 second layer 212, 212' second air hole R2 Aperture
L3 third layer 213, 213' third air hole R3 Aperture
L4 fourth layer 214, 214' fourth air hole R4 Aperture
22. 22' second air inlet group
221. 221 'first air hole 222, 222' second air hole
223. 223 ' third air hole 224, 224' fourth air hole
30. 30' exhaust port group
40. 40' air detection module
41. 41' dust detecting element 42 Formaldehyde detecting element
43 carbon monoxide detecting element 44, 44' VOC detecting element
45 'temperature and humidity detection element 46, 46' circuit board
50. 50' power supply module
51. 51 'USB interface 52' battery
60. 60' display assembly
70. 70' control assembly
71 touch key module 72 human-machine interface
71 'Induction touch spring 72' touch button
Detailed Description
In order to more clearly illustrate the present invention, preferred embodiments are described in detail below with reference to the accompanying drawings. Referring to fig. 1 to 7, a preferred embodiment of an air quality detecting device 1 of the present invention is shown for detecting and displaying various air quality data. As shown in fig. 3, the air quality detecting apparatus 1 includes a hollow housing 10, and an air detecting module 40, a power supply module 50, a display module 60, and a control module 70 disposed inside the housing 10.
As shown in fig. 1 to 3, the housing 10 may be assembled by a plurality of outer shells, in this embodiment, the housing 10 is assembled by an upper front shell 10a, a rear shell 10b and a lower base 10c, an air inlet set 20 is disposed on the base 10c, in this embodiment, the air inlet set 20 includes a first air inlet set 21 and a second air inlet set 22 respectively disposed on two side edges of the base 10c, and mutually corresponding slots are respectively disposed on the top of the front shell 10a and the top of the rear shell 10b, and after the front shell 10a and the rear shell 10b are butted, the mutually corresponding slots respectively form through holes to form a complete air outlet set 30; the assembled shell 10 forms a space inside, and the space inside can be divided into an air inlet area 11 adjacent to the bottom of the shell 10 and located in the base 10c, an air outlet area 13 adjacent to the top of the shell 10 and located in the front shell 10a and the rear shell 10b, and an air flow channel 12 communicating the air inlet area 11 and the air outlet area 13; the air intake area 11 is communicated with the air inlet set 20, so that external ambient air can enter the air intake area 11 inside the casing 10 through the air inlet set 20, and the air exhaust area 13 is communicated with the air outlet set 30, so that air in the air exhaust area 13 inside the casing 10 can flow out of the casing 10 through the air outlet set 30.
Referring to fig. 5 to 7, the detailed structure of the first air inlet group 21 on the base 10c side in the air inlet group 20 will be described below. The first air inlet set 21 of the present embodiment is composed of a plurality of air holes, wherein the plurality of air holes are arranged layer by layer, the apertures of the air holes located in the same layer are the same, and the layer of air holes farthest from the top of the housing 10 is defined as a first layer L1, the layer of air holes next farthest from the top of the housing 10 is defined as a second layer L2, and so on, in the present embodiment, the third layer L3 and the fourth layer L4 are further included, but not limited thereto. The air holes are arranged according to the following rules: the smaller the (average) pore size of the air holes closer to the top of the case 10 (the smaller the area of the air holes allowing air to pass therethrough), the larger the (average) pore size of the air holes farther from the top of the case 10 (the larger the area of the air holes allowing air to pass therethrough), that is, in the present embodiment, the horizontal hole diameters of the air holes 211, 212, 213, 214 located in the respective layers L1, L2, L3, L4 are uniform, however, the vertical (largest) aperture R1 of the first air holes 211 in the first layer L1 is larger than the vertical (largest) aperture R2 of the second air holes 212 in the second layer L2, the vertical (largest) aperture R2 of the second air holes 212 in the second layer L2 is larger than the vertical (largest) aperture R3 of the third air holes 213 in the third layer L3, and the vertical (largest) aperture R3 of the third air holes 213 in the third layer L3 is larger than the vertical (largest) aperture R4 of the fourth air holes 214 in the fourth layer L4. The vertical (largest) pore size R2 of the second pores 212 is about 40% to 90% of the vertical (largest) pore size R1 of the first pores 211, the vertical (largest) pore size R3 of the third pores 213 is about 40% to 90% of the vertical (largest) pore size R2 of the second pores 212, and the vertical (largest) pore size R4 of the fourth pores 214 is about 40% to 90% of the vertical (largest) pore size R3 of the third pores 213. The first air holes 211, the second air holes 212 and the third air holes 213 are substantially oblong with the vertical apertures gradually decreasing, and the fourth air holes 214 are substantially circular with the vertical apertures being the smallest and equal to the horizontal apertures, as shown in fig. 5, but the shapes of the air holes are not limited thereto. The second air inlet group 22 located on the other side of the base 10c is disposed corresponding to the first air inlet group 21 and has the same structure, the second air inlet group 22 is also formed by arranging a plurality of air holes layer by layer, and also includes a first air hole 221 located on the first layer, a second air hole 222 located on the second layer, a third air hole 223 located on the third layer, a fourth air hole 224 located on the fourth layer, and the like, and the aperture change of the second air hole is the same as that of the first air inlet group 21, which is not described herein again.
The air outlet group 30 located at the top of the housing 10 is composed of a plurality of elongated through holes, and the total area of the air inlet group 20 allowing air to pass therethrough is about 2 to 4 times the total area of the air outlet group 30 allowing air to pass therethrough.
The air detecting module 40 is fixed inside the casing 10 and can be driven by the power supply module 50 also fixed inside the casing 10 to detect the air composition and state passing through the air quality detecting module 40. In the present embodiment, the air detection module 40 includes a dust detection element 41, a formaldehyde detection element 42, a carbon monoxide detection element 43, a VOC detection element 44, and a circuit board 46; as shown in fig. 4 and 6, the circuit board 46 is disposed in the air intake area 11 and spans over a portion of the air flow channel 12, the formaldehyde detecting element 42, the carbon monoxide detecting element 43, and the VOC detecting element 44 are disposed in the air intake area 11 and adjacent to the air inlet set 20, and the dust detecting element 41 is disposed in the air flow channel 12 at a middle position. The power supply module 50 includes a USB interface 51 disposed adjacent to the rear shell 10b, and the rear shell 10b has an opening corresponding to the USB interface 51 for connecting the USB interface 51 with an external power source such as: the commercial power system, the portable power supply and the like.
The casing 10 is further provided with a display component 60, and the display component 60 is coupled to the air quality detection module 40, which is represented by a liquid crystal display module in this embodiment; the display unit 60 can simply display the status of the air quality, and prompt the user to provide the air quality information affecting the health of the human body.
The control component 70 is coupled to the air quality detecting module 40, in the present embodiment, the control component 70 is composed of a touch key module 71 and a human-machine interface 72, wherein the human-machine interface 72 is represented by a button disposed in the front housing 10a and recessed inward, but not limited thereto, and may also be an outward protruding or printed button, the touch key module 71 is disposed in the housing 10 and configured corresponding to each button of the human-machine interface 72, and a user can operate the human-machine interface 72 to trigger the touch key module 71, so as to control actions of the air quality detecting module 40, such as opening, closing, and adjusting a display state.
Referring to fig. 6 and 7, the functions of the structural designs of the air quality detecting device 1 and the flowing conditions of the air flow inside the housing 10 during the operation thereof will be described. The user sees through the USB transmission line and is connected USB interface 51 with external power supply to operation control assembly 70 makes air quality detection module 40 begin to act, because each detecting element all can generate heat at the during operation, make the air around each detecting element heated, because the density of hot-air is less than cold air, based on the hot-air rising principle, the air after the heating upwards moves, below air will rise in order to fill up the vacancy of leaving over at this moment, cause the air to present the trend of upwards flowing, so make casing 10 inside begin to produce the thermal convection. Furthermore, considering the difference of the heat generation amount of each detecting element in operation and the mutual influence of the heat convection principle, the present embodiment further performs the configuration of each detecting element according to the design principle that the element with larger heat generation amount is higher and the element with smaller heat generation amount is lower, for example: since the dust detecting element 41 generates a larger amount of heat than other detecting elements when operating, in this embodiment, the dust detecting element 41 is disposed above the other detecting elements, and other detecting elements are disposed below the dust detecting element 41, for example: a formaldehyde detecting element 42, a carbon monoxide detecting element 43, and a VOC detecting element 44; this configuration accelerates the convective velocity of the airflow inside the housing 10, following the tendency of thermal convection.
After the hot air starts to rise, it will flow along the air flow path 12 to the exhaust area 13, and finally leave the housing 10 through the exhaust port group 30. At the same time, the external ambient air will enter the housing 10 from the first and second air inlet sets 21, 22 to fill the internal void; since the variation of the aperture size of each of the air holes of the first and second air inlet sets 21, 22 (i.e. the variation of the area of the air holes allowing the air to pass) causes the flow rate of the air passing through the first air holes 211, 221 to be smaller than the flow rate of the air passing through the second air holes 212, 222, according to Bernoulli's Law, the constant relationship among the three exists among the air flow rate, the difference between high and low, and the flow field pressure, and in the state that the difference between high and low is not changed, the pressure is high when the flow rate is low, and the pressure is low when the flow rate is high, so that the area of the air inlet area 11 adjacent to the first air holes 211, 221 forms a relatively high pressure area due to the relatively slow air flow rate, the area of the air inlet area 11 adjacent to the second air holes 212, 222 forms a relatively low pressure area due to the relatively fast air flow rate, and the pressure difference is formed between the two areas, so that the air passing through the first air holes 211, 221 is driven to flow from the relatively high pressure area to the relatively low pressure area, thereby pushing the air that has passed through the second air holes 212 and 222 and is located at the relatively low pressure area and accelerating the air located at the relatively low pressure area into the air flow channel 12, as shown in fig. 7. It can be understood that, due to the variation trend of the aperture, the flow rate of the air passing through the second air holes 212 and 222 is also smaller than that of the air passing through the third air holes 213 and 223, so that the area of the air inlet area 11 adjacent to the second air holes 212 and 222 forms a relatively high pressure area, and the area of the air inlet area 11 adjacent to the third air holes 213 and 223 forms a relatively low pressure area, and a pressure difference is formed therebetween, so that the air passing through the second air holes 212 and 222 pushes the air passing through the third air holes 213 and 223 to flow upward, and thus the air passing through the third air holes 213 and 223 also pushes the air passing through the fourth air holes 214 and 224 to flow upward. The gradual change design of the aperture of the air hole enables the outside air to be easily pushed upwards after entering the air inlet group 20, the air naturally has the tendency of flowing upwards, and the whole air inlet group 20 can uniformly and effectively enter the air due to the fact that the air flow traction speed is increased.
After entering the housing 10, the external ambient air passes through the detecting element located in the air inlet region 11, and flows upward under the action of the aforementioned pressure difference, then passes through the formaldehyde detecting element 42, the carbon monoxide detecting element 43, and the VOC detecting element 44 located in the air flow channel 12, and then passes through the dust detecting element 41 located above, and each detecting element 41, 42, 43, and 44 detects the passing air, and the detection result is displayed on the display component 60, so that the user can inspect the air quality state. Meanwhile, the air passing through the air detection module 40 is heated again, and based on the principle of hot air rising, the air rises again and passes through the exhaust area 13 and leaves the housing 10 through the exhaust port group 30, and the external ambient air below enters the housing 10 through the air inlet group 20 for compensation, so that the circulation is performed, and the air inside the housing 10 is well convected without stagnation and the like. Furthermore, as can be seen from the principle of Stack Effect, under the condition that the distance height between the air inlet and the air outlet and the average internal operating temperature are approximately unchanged, the flow rate is proportional to the area of the air inlet and the air outlet, the flow rate is increased by about 27% when the ratio of the area of the air inlet to the area of the air outlet is 2 times, and the flow rate is increased by about 37% when the ratio of the area of the air inlet to the area of the air outlet is 4 times; in the present embodiment, the total area of the air inlet set 20 for allowing air to pass through is adjusted to be 2 to 4 times of the total area of the air outlet set 30 for allowing air to pass through, so as to increase the flow rate of air passing through the inside of the casing 10 and increase the convection velocity inside and outside the casing 10.
In general, based on the self-heating of the air detection module 40, the arrangement relationship of the detection elements, the optimization of the structure of the air inlet set 20, and the design of the difference between the area of the air inlet set 20 allowing air to pass through and the area of the air outlet set 30 allowing air to pass through, the air flow inside the housing 10 of the overall air quality detection device 1 and the detection function of the air detection module 40 can be promoted, and the noise and damage risk caused by installing an electric fan can be reduced, thereby increasing the operation stability of the detection device.
Referring to fig. 8 to 11, a housing 10 ', an air inlet set 20 ' and an air outlet set 30 ' on the housing 10 ', a display unit 60 ' and a control unit 70 ' of the air quality detecting device 1 ' according to another preferred embodiment of the present invention are substantially the same as those of the previous embodiments, and this embodiment aims to provide another selection of the air detecting module 40 ' and the power supply module 50 '. In this embodiment, the air detection module 40 ' includes a dust detection element 41 ', a VOC detection element 44 ', a temperature and humidity detection element 45 ', and a circuit board 46 '; as shown in fig. 10 and 11, the circuit board 46 ' is disposed in the air intake area 11 ' and adjacent to the bottom of the base 10c ', the VOC detecting element 44 ' and the temperature/humidity detecting element 45 ' are disposed in the air intake area 11 ' and adjacent to the air inlet set 20 ', and the dust detecting element 41 ' is disposed in the air flow channel 12 ' and at an upper position. The power supply module 50 ' includes a USB interface 51 ' disposed adjacent to the rear shell 10b ', and the rear shell 10b ' has an opening corresponding to the USB interface 51 ' for connecting the USB interface 51 ' with an external power source, wherein the power supply module 50 ' of the present embodiment further includes a battery 52 ' disposed inside the casing 10 and adjacent to the front shell 10a ', and the battery 52 ' can be a rechargeable battery such as a lithium battery, and is used as a power source of the air quality detecting device 1 '. In addition, the control component 70 'includes a sensing touch spring 71' and a touch button 72 ', wherein the sensing touch spring 71' is disposed in the housing 10 'and coupled to the air detection module 40', and the touch button 72 'is disposed in the front housing 10 a' for being operated by a user to trigger the sensing touch spring 71 'to drive the air detection module 40'.
It should be noted that, in this embodiment, the dust detecting element 41 ' is disposed above the VOC detecting element 44 ' and the temperature/humidity detecting element 45 ' according to the design principle that the elements with larger heat generation amount are higher, so as to accelerate the heat convection trend. And because the temperature and humidity detecting element 45 ' is arranged in the area adjacent to the air inlet group 20 ', the air entering from the air inlet group 20 ' can be immediately detected by the temperature and humidity detecting element 45 ', so that the temperature and humidity data are ensured not to be distorted due to heating, the above configuration meets the action requirements of each detecting element, and the whole air quality detecting device 1 ' has high response speed and accuracy. Furthermore, the battery 52 'is used as the power source of the device, so that the air quality detection device 1' can be portable, and the battery 52 'can be charged when being connected with an external power source through the USB interface 51', thereby prolonging the operation time when being carried out.
Referring to fig. 11, the flow of the air flow inside the housing 10 'when the air quality detecting device 1' is operated will be described. The user operates the control assembly 70 ' to start the operation of the air quality detecting module 40 ', the detecting elements 41 ', 44 ', 45 ' of the air quality detecting module 40 ' operate and gradually generate heat energy, the heat energy heats the air around the detecting elements 41 ', 44 ', 45 ', the hot air rises away from the surrounding areas of the detecting elements 41 ', 44 ', 45 ' due to the rising principle of the hot air, the air below fills up the left gap, so as to generate an upward air flow, so that the hot air finally leaves the housing 10 ' from the exhaust area 13 ' through the exhaust port group 30 ', and the external ambient air enters the intake area 11 ' of the housing 10 ' from the first intake port group 21 ' and the second intake port group 22 ', and the air passes through the air holes 211 ', 212 ', 213 ', 214 ', 221 ', 222 ', 223 ', 224 ', in the same way as the previous embodiment, because of the difference in aperture (i.e., the area of the air holes allowing air to pass through) between the air holes of the different layers, a velocity difference is generated between the air in the different layers, and thus a pressure difference is generated, because the air pressure in the lower layer is relatively higher and the air pressure in the upper layer is relatively lower, the air in the lower layer pushes the air in the upper layer to move upward toward the airflow channel 12 ', and at the same time, the air passes through the detecting elements 41 ', 44 ', 45 ' of the air quality detecting module 40 ' to be detected, and the detection result of the air quality detecting module 40 ' is displayed on the display unit 60 ' for the user to detect the air quality state. The air passing through the air quality detecting module 40 'is heated again, the hot air rises and the air below fills up, so that an upward airflow is generated again, and the ambient air below enters the housing 10' through the air inlet set 20 ', and circulates, so that the air inside the housing 10' flows well.
The detailed description of the preferred embodiments is provided only for the convenience of illustrating the technical contents of the present invention, and the present invention is not limited to the above embodiments in a narrow sense, and various modifications made without departing from the spirit of the present invention and the scope of the following claims are included in the scope of the present invention.
Claims (12)
1. An air quality detection device, comprising:
the shell is hollow and is divided into an air inlet area, an air exhaust area and an air flow channel for communicating the air inlet area with the air exhaust area, the air inlet area is close to the bottom of the shell, the air exhaust area is close to the top of the shell, and the air flow channel is arranged between the air inlet area and the air exhaust area;
at least one air inlet group, which is arranged on the shell and is close to the bottom of the shell, and at least comprises a first air hole and a second air hole which are respectively communicated with the air inlet area, so that the external ambient air can enter the air inlet area through the first air hole and the second air hole; the distance between the first air hole and the top of the shell is greater than the distance between the second air hole and the top of the shell, the area of the air hole allowing air to pass through of the first air hole is greater than the area of the air hole allowing air to pass through of the second air hole, and the first air hole and the second air hole are arranged on the same side of the shell;
the air outlet group is arranged on the shell and is close to the top of the shell, and the air outlet group is communicated with the air exhaust area, so that the air in the air exhaust area can flow out of the shell through the air outlet group;
the air quality detection module is fixedly arranged in the shell and is adjacent to the air inlet area and the airflow channel in the shell, and the air quality detection module is driven to act so as to detect the air components passing through the air quality detection module;
when the air quality detection module acts to generate heat energy, the heat energy enables the air entering the shell through the first air hole and the second air hole to be heated, and the flow rate of the air passing through the first air hole is smaller than that of the air passing through the second air hole; the air after temperature rise naturally rises to flow to the air exhaust area through the air flow channel and flows out of the shell from the air exhaust port group;
the air passing through the first air hole has a flow rate smaller than that of the air passing through the second air hole, so that a relatively high pressure area is formed in the area of the air inlet area adjacent to the first air hole, and a relatively low pressure area is formed in the area of the air inlet area adjacent to the second air hole, so that the air passing through the first air hole is pushed from the relatively high pressure area to the air passing through the second air hole and located in the relatively low pressure area, so as to accelerate the air located in the relatively low pressure area to enter the air flow channel and flow to the air exhaust area, and then flow out of the shell from the air outlet group.
2. The air quality detection device of claim 1, wherein the total area of the set of air inlets that allows air to pass through is 2-4 times the total area of the set of air outlets that allows air to pass through.
3. The air quality detecting apparatus as claimed in claim 1, wherein the number of the inlet sets is two, and the two inlet sets are respectively disposed at two opposite sides of the housing, such that a first inlet set and a second inlet set of the two inlet sets are oppositely disposed and respectively communicated with the air inlet area, and external ambient air can enter the air inlet area through the first inlet set and the second inlet set of each inlet set.
4. The air quality detecting apparatus according to claim 1, wherein the air inlet set further comprises a third air hole, the distance between the third air hole and the top of the housing is smaller than the distance between the second air hole and the top of the housing, and the area of the third air hole allowing air to pass through is smaller than the area of the second air hole allowing air to pass through.
5. The air quality detecting device of claim 1, wherein the maximum aperture of the second air hole of the air inlet set is 40% -90% of the maximum aperture of the first air hole.
6. The air quality detecting apparatus according to claim 1, wherein the first air hole has an oblong or circular shape.
7. The air quality detecting device of claim 1, wherein the air quality detecting module comprises one or a combination of a dust detecting element, a formaldehyde detecting element, a carbon monoxide detecting element, a VOC detecting element and a temperature/humidity detecting element.
8. The air quality detecting device according to claim 7, wherein when the number of the detecting elements of the air quality detecting module is equal to or greater than two, the positions of the detecting elements inside the housing are arranged according to the magnitude of the heat generated by the respective operations, and the detecting element generating the heat with the larger amount is disposed above the detecting element generating the heat with the smaller amount.
9. The air quality detecting device of claim 7, wherein the temperature/humidity detecting element of the air quality detecting module is adjacent to the air inlet set to detect air flowing in from the air inlet set.
10. The air quality detecting device of claim 1, further comprising a power module, wherein the power module drives the air quality detecting module to operate; wherein, the power supply module at least comprises a battery or a USB interface which can be connected with an external power supply.
11. The air quality detecting device of claim 1, further comprising a display element, wherein the display element is connected to the air quality detecting module, and at least a portion of the display element is exposed outside the housing to display the air quality status.
12. The air quality detecting apparatus according to claim 1, further comprising a control element, the control element being connected to the air quality detecting module, and at least a portion of the control element being exposed outside the housing to control the operation of the air quality detecting module.
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| CN201910349445.3A CN111855893B (en) | 2019-04-28 | 2019-04-28 | Air quality detection device |
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| CN201910349445.3A CN111855893B (en) | 2019-04-28 | 2019-04-28 | Air quality detection device |
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| CN111855893A (en) | 2020-10-30 |
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