Air quality detection module and air purifier

Abstract

The utility model discloses an air quality detection module and an air purifier, and relates to the technical field of air purifiers, specifically, the air quality detection module comprises a sensor assembly; the sensor box is used for fixedly installing the sensor assembly, an air inlet channel and an air outlet channel are arranged in the sensor box, and the air inlet channel and the air outlet channel are used for communicating the external environment with an air inlet and an air outlet of the sensor assembly respectively; according to the air quality detection module and the air purifier, the air inlet channel and the air outlet channel are arranged on the sensor box, and the gap for communicating the negative pressure space in the air purifier is arranged between the air outlet channel and the air outlet of the sensor assembly, so that even if the air outlet of the sensor assembly is in continuous negative pressure, the air quality can be detected; therefore, the air flow in the external environment is driven to quickly enter the sensor assembly through the air inlet channel, and the detection precision of the sensor assembly is ensured.

Description

TECHNICAL FIELD

[0001] The utility model relates to air purifier technical field, more specifically, relate to a kind of air quality detection module.In addition, the utility model further relates to a kind of air purifier comprising the air quality detection module described above. BACKGROUND

[0002] Current market air purifier is with PM2.5 air quality detector.PM 2.5 sensor is divided into laser and infrared two categories.Laser precision (±10%), high cost;Infrared has cost advantage, but precision is low, about ±30%, and is easily influenced by external environment and machine structure, bring the large deviation of data.

[0003] Wherein the reason that infrared sensor precision is worse than laser sensor precision is mainly, the flow of the airflow detected in infrared sensor mainly depends on the heat of internal heating resistor, makes internal hot air float through air outlet, and then internal negative pressure is formed, attracts external air to enter, but in actual use, since sensor is mostly in the inside of air purifier, there is greater distance between the air inlet of sensor and external environment, and the negative pressure in sensor is not enough to attract the airflow in external environment to enter the detection position of sensor, causes the precision of infrared sensor to drop;

[0004] And laser sensor has independent fan inside, actively drives sensor internal airflow to flow, and then can drive external air to enter the detection position of sensor, and then precision is higher than infrared sensor, but the cost of laser sensor is much higher than infrared sensor.

[0005] Summarized above, how to solve the problem that external environment airflow cannot enter infrared sensor, leading to the precision of infrared sensor to drop, is the problem that the present technical personnel in the field urgently solves. Utility model content

[0006] Therefore, the utility model aims at providing a kind of air quality detection module, by setting up air inlet channel and air outlet channel on sensor box, and setting up the gap of the negative pressure space of air purifier inside leading air between air outlet of air outlet channel and sensor assembly, even if sensor assembly air outlet place continues negative pressure, and then drive external environment airflow to enter sensor assembly inside quickly through air inlet channel, and then guarantee the detection precision of sensor assembly.

[0007] Another purpose of the utility model is to provide a kind of air purifier comprising the air quality detection module described above, with the same technical features, can solve the same technical problems.

[0008] In order to realize the above-mentioned purpose, the utility model provides the following technical scheme:

[0009] An air quality detection module for detecting ambient air quality in an air purifier, comprising:

[0010] a sensor assembly;

[0011] a sensor box for fixedly mounting the sensor assembly, and having an air inlet channel and an air outlet channel arranged therein, the air inlet channel and the air outlet channel being used for connecting the ambient environment with an air inlet and an air outlet of the sensor assembly, respectively;

[0012] a sealing gasket arranged between the sensor box and the sensor assembly, and used for sealing the joint between the air inlet channel and the air inlet of the sensor assembly, and sealing the joint between the air outlet channel and the air outlet of the sensor assembly;

[0013] wherein the sealing gasket is provided with a notch at the position of the air outlet of the sensor assembly, and used for connecting the air outlet of the sensor assembly with a negative pressure space inside the air purifier.

[0014] Preferably, the sensor box is provided with a ventilation channel at the position close to the air outlet of the sensor assembly, and the ventilation channel connects the ambient environment with the negative pressure space inside the air purifier.

[0015] Preferably, the sealing gasket at the position of the notch edge forms a semi-enclosed structure for the joint between the air outlet channel and the air outlet of the sensor assembly, and the open area of the notch is directed towards the open end of the ventilation channel.

[0016] Preferably, the surface of the sealing gasket is provided with a through hole, and the two ends of the through hole are connected with the air inlet channel and the air inlet of the sensor assembly, respectively, and the cross-sectional area of the through hole is not less than the cross-sectional area of the air inlet channel and the air inlet of the sensor assembly.

[0017] Preferably, the sensor box is fixedly provided with a decorative cover outside, and the surface of the decorative cover is provided with a plurality of groups of communication holes for connecting the ambient environment with the channels on the surface of the sensor box.

[0018] An air purifier comprising the air quality detection module according to any one of the preceding claims.

[0019] Preferably, the air purifier further comprises a relatively fixed housing, an air inlet bottom plate and an impeller shell.

[0020] The impeller shell forms a first negative pressure cavity inside, and the area surrounded by the outer wall of the impeller shell, the air inlet bottom plate and the housing forms a second negative pressure cavity.

[0021] A negative pressure channel is arranged between the first negative pressure cavity and the second negative pressure cavity for connection, and the notch connects the second negative pressure cavity with the air outlet of the sensor assembly.

[0022] Preferably, the different side inner walls of the negative pressure channel are respectively provided with a plurality of groups of protrusions for changing the airflow direction and flow rate in the negative pressure channel.

[0023] Compared with the prior art, the air quality detection module has at least the following beneficial effects:

[0024] 1. A notch is arranged between the air outlet of the sensor assembly and the air outlet channel, and the notch is communicated with the negative pressure space inside the air purifier, so that the air outlet of the sensor assembly is continuously under negative pressure, thereby enabling external airflow to continuously pass through the air inlet of the sensor assembly, and thereby improving the detection accuracy of the sensor.

[0025] 2. The notch is arranged on the sealing gasket, that is, the size of the notch can be changed by cutting the sealing gasket, that is, the conduction amount of the air outlet of the sensor assembly and the negative pressure space inside the air purifier can be changed, so that the size of the notch can be quickly adjusted according to the requirements during design, and thereby the negative pressure at the air outlet of the sensor assembly can be adjusted.

[0026] 3. The air inlet channel is arranged in the sensor box, and the air inlet channel and the air inlet of the sensor assembly are sealed by the sealing gasket, so that the airflow of the external environment can quickly enter the sensor assembly through the air inlet channel without escaping, and the airflow inside the air purifier cannot enter the sensor assembly through the air inlet of the sensor assembly, thereby ensuring that the data measured by the sensor assembly is the real data of the external environment. BRIEF DESCRIPTION OF DRAWINGS

[0027] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiment or prior art description. Obviously, the drawings in the following description are only embodiments of the present application, and for those skilled in the art, other drawings can also be obtained without creative labor on the basis of the provided drawings.

[0028] Figure 1 Structure diagram of the air quality detection module provided by the present application;

[0029] Figure 2 Structure diagram of the air quality detection module provided by the present application from another perspective;

[0030] Figure 3 Sectional view of the air quality detection module provided by the present application;

[0031] Figure 4 Parts explosion view of the air quality detection module provided by the present application;

[0032] Figure 5The utility model provides an assembly diagram of air purifier internal detection module provided by the utility model,

[0033] Figure 6 The utility model provides the structure diagram of air inlet bottom plate provided by the utility model,

[0034] Figure 7 The utility model provides the top view of air inlet bottom plate provided by the utility model.

[0035] In the drawing,

[0036] 1, decorative cover,

[0037] 2, sensor box, 21, air inlet channel, 22, air outlet channel, 23, ventilation channel,

[0038] 3, sensor assembly,

[0039] 4, gasket, 41, notch,

[0040] 5, air inlet bottom plate, 51, negative pressure channel, 52, protrusion,

[0041] 6, impeller shell. DETAILED DESCRIPTION

[0042] The technical scheme in the embodiments of the utility model will be described clearly and completely below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the utility model.

[0043] The core of the utility model is to provide an air quality detection module, by setting up air inlet channel and air outlet channel on sensor box, and setting up the notch of the air purifier internal negative pressure space guide air between the air outlet of air outlet channel and sensor assembly, even if the sensor assembly air outlet place continues negative pressure, and then drive the outside environment airflow to enter the sensor assembly inside quickly through air inlet channel, and then guarantee the detection precision of sensor assembly.

[0044] Another core of the utility model is to provide an air purifier including the above-mentioned air quality detection module, with the same technical features, can solve the same technical problems.

[0045] Please refer to Figures 1-4 An air quality detection module for detecting ambient air quality in an air purifier, comprising:

[0046] Sensor assembly 3,

[0047] The sensor box 2 is used to fix the sensor assembly 3, and it is provided with an air inlet channel 21 and an air outlet channel 22 inside. The air inlet channel 21 and the air outlet channel 22 are respectively used to connect the external environment with the air inlet and air outlet of the sensor assembly 3.

[0048] The sealing gasket 4 is disposed between the sensor box 2 and the sensor assembly 3 to seal the seam between the air inlet channel 21 and the air inlet of the sensor assembly 3, and to seal the seam between the air outlet channel 22 and the air outlet of the sensor assembly 3.

[0049] The sealing gasket 4 has a notch 41 at the air outlet of the sensor assembly 3, which is used to connect the air outlet of the sensor assembly 3 with the negative pressure space inside the air purifier.

[0050] like Figures 1-4 As shown, the sensor assembly 3 is installed inside the sensor box 2, which facilitates the installation of the sensor assembly 3 and the air purifier. Since the sensor box 2 can be directly fixed to the outer shell of the air purifier, the actual installation position of the sensor assembly 3 is close to the external environment, which facilitates the introduction of airflow from the external environment to the detection position inside the sensor assembly 3. This ensures that the detection result of the sensor assembly 3 is equal to the actual value of the external environment, thus ensuring the effectiveness of the detection.

[0051] Meanwhile, an air inlet channel 21 is provided inside the sensor box 2, and the air inlet channel 21 is directly connected to the air inlet of the sensor assembly 3, so that the airflow of the external environment can directly enter the test position of the sensor assembly 3 through the air inlet channel 21, thereby ensuring that the sensor assembly 3 detects the airflow of the external environment. At the same time, a sealing gasket 4 is added to improve the sealing of the connection between the air inlet channel 21 and the air inlet of the sensor assembly 3.

[0052] Furthermore, an air outlet channel 22 is provided inside the sensor box 2 and is connected to the air outlet of the sensor assembly 3. This allows the airflow after the sensor assembly 3 has been tested to be discharged to the outside of the air purifier through the air outlet channel 22. At the same time, a sealing gasket 4 is added to seal the connection between the air outlet of the sensor assembly 3 and the air outlet channel 22. However, a notch 41 is provided at this sealed position, so that the air outlet of the sensor assembly 3 can be connected to the negative pressure space inside the air purifier through the notch 41. This makes the air outlet of the sensor assembly 3 in a negative pressure state, which accelerates the exhaust of gas from the sensor assembly 3 and accelerates the gas flow rate at the air inlet of the sensor assembly 3. This allows the airflow from the external environment to quickly enter the sensor assembly 3 through the air inlet channel 21, which is equivalent to the function of an active fan inside the laser sensor, thereby effectively improving the detection accuracy of the infrared sensor.

[0053] Furthermore, the conductive cross section of the notch 41 directly affects the negative pressure at the air outlet of the sensor assembly 3, which directly affects the airflow velocity inside the sensor assembly 3. Therefore, during the design and production process, it is only necessary to cut the sealing gasket 4 and change the size of the notch 41 to adjust the airflow velocity inside the sensor assembly 3. Compared with other design changes, it has the advantages of low cost and easy implementation.

[0054] In some embodiments, a ventilation channel 23 is provided at the position of the sensor box 2 near the air outlet of the sensor assembly 3, and the ventilation channel 23 connects the external environment and the negative pressure space inside the air purifier.

[0055] like Figure 2 As shown, the sensor box 2 is also equipped with a ventilation channel 23, which connects the negative pressure space inside the air purifier with the external environment to balance the internal and external air pressure.

[0056] In some embodiments, the sealing gasket 4 at the edge of the notch 41 forms a semi-enclosed structure to the seam between the air outlet 22 and the air outlet of the sensor assembly 3, and the open area of ​​the notch 41 faces the opening end of the ventilation channel 23.

[0057] like Figure 2 As shown, one end of the ventilation channel 23 is close to the air outlet of the sensor assembly 3. That is, the negative pressure space inside the air purifier will attract outside air to enter through the ventilation channel 23, and the airflow in the ventilation channel 23 will flow through the gap 41, forming a low pressure area at the gap 41, which in turn makes the air outlet of the sensor assembly 3 negative pressure, thereby driving the gas flow in the sensor assembly 3.

[0058] In some embodiments, a through hole is provided on the surface of the sealing gasket 4, and the two ends of the through hole are respectively connected to the air inlet channel 21 and the air inlet of the sensor assembly 3. The cross-sectional area of ​​the through hole is not less than the cross-sectional area of ​​the air inlet channel 21 and the air inlet of the sensor assembly 3.

[0059] like Figure 4 As shown, the sealing gasket 4 is pasted on the outer surface of the sensor assembly 3 and has a through hole inside to expose the air inlet and outlet of the sensor assembly 3. The sealing gasket 4 located at the air inlet of the sensor assembly 3 completely surrounds the air inlet, effectively ensuring the sealing around the air inlet. The cross-sectional area of ​​the through hole is not less than the cross-sectional area of ​​the air inlet and the air inlet channel 21, thereby avoiding the sealing gasket 4 from increasing the air intake resistance of the sensor assembly 3.

[0060] The sealing gasket 4 located at the air outlet of the sensor assembly 3 partially surrounds the air outlet, forming a gap 41 at the unenclosed position. The gap 41 connects to the negative pressure space inside the air purifier and faces the opening end of the ventilation channel 23. With the help of the airflow from the opening of the ventilation channel 23, a negative pressure zone is formed at the gap 41.

[0061] In some embodiments, a decorative cover 1 is fixedly provided on the outside of the sensor box 2. The surface of the decorative cover 1 is provided with a plurality of connecting holes for connecting the external environment and the surface of the sensor box 2.

[0062] like Figure 4 As shown, due to the structural limitations of the sensor component 3, the air inlet channel 21, the ventilation channel 23, and the air outlet channel 22 have different opening positions and cross-sectional areas, which reduces their aesthetics. Therefore, by adding a decorative cover 1 and setting regularly arranged and uniformly sized connecting holes on the decorative cover 1, the air inlet channel 21, the air outlet channel 22, and the ventilation channel 23 can be connected, thereby improving the overall aesthetics of the module.

[0063] In addition to the air quality detection modules disclosed in the above embodiments, this utility model also provides an air purifier that includes the above-described air quality detection modules.

[0064] In some embodiments, it also includes a relatively fixed outer casing, an air inlet base plate 5, and an impeller casing 6;

[0065] A first negative pressure chamber is formed inside the impeller housing 6, and a second negative pressure chamber is formed in the area enclosed by the outer wall of the impeller housing 6, the air inlet base plate 5, and the outer shell.

[0066] A negative pressure channel 51 is provided between the first negative pressure chamber and the second negative pressure chamber for communication, and a notch 41 connects the second negative pressure chamber and the air outlet of the sensor assembly 3.

[0067] like Figure 5 As shown, the impeller housing 6 is installed inside the outer shell, and the closed area of ​​the air inlet base plate 5 blocks the bottom of the outer shell. The ventilation area of ​​the air inlet base plate 5 shields the bottom of the impeller housing 6. The impeller is installed inside the impeller housing 6. When the impeller rotates, it can drive the external airflow through the filter screen and filter element below the air inlet base plate 5 and then enter the impeller housing 6 through the ventilation area of ​​the air inlet base plate 5.

[0068] At this time, a negative pressure channel 51 is set between the first negative pressure chamber inside the impeller housing 6 and the second negative pressure chamber outside the impeller housing 6. This allows the gas in the second negative pressure chamber to enter the first negative pressure chamber through the negative pressure channel 51, thereby making the second negative pressure chamber also negative. The second negative pressure chamber is the negative pressure area that is connected to the air outlet of the sensor assembly 3. By setting the negative pressure channel 51 and designing the structure of the negative pressure channel 51, the airflow that directly enters the inner cavity of the impeller housing 6 without being filtered by the filter screen or filter element can be reduced.

[0069] In some embodiments, the inner walls of different sides of the negative pressure channel 51 are provided with a number of protrusions 52, which are used to change the airflow direction and velocity in the negative pressure channel 51.

[0070] like Figure 6 and Figure 7As shown, the negative pressure channel 51 is transversely arranged on the air inlet bottom plate 5, and functions to guide the air in and out of the impeller shell 6, and irregular protrusions 52 are arranged on the inner wall of the negative pressure channel 51, such as protrusions 52 arranged on the inner walls of different sides respectively, which affect the flow direction of the air in the negative pressure channel 51, increase the flow resistance, and further reduce the air passing amount.

[0071] The various embodiments are described in a progressive manner in the specification, and each embodiment focuses on the differences from other embodiments, and the same or similar parts between various embodiments can be referred to each other.

[0072] The air quality detection module and the air purifier provided by the utility model are introduced in detail. The principle and implementation mode of the utility model are described by applying specific examples in this paper. The above embodiment is only used to help understand the method and core idea of the utility model. It should be pointed out that for ordinary skilled persons in the technical field, the utility model can be improved and modified without departing from the principle of the utility model, and these improvements and modifications also fall within the protection scope of the utility model claim.

Claims

1. An air quality detection module for detecting ambient air quality inside an air purifier, characterized in that, The application relates to an air quality detection module. The application comprises: a sensor assembly (3); a sensor box (2) for fixedly mounting the sensor assembly (3), and internally provided with an air inlet channel (21) and an air outlet channel (22) for respectively connecting an external environment with air inlets and air outlets of the sensor assembly (3); a sealing gasket (4) arranged between the sensor box (2) and the sensor assembly (3) for sealing joints between the air inlet channel (21) and the air inlets of the sensor assembly (3) and between the air outlet channel (22) and the air outlets of the sensor assembly (3); 2. The air quality detection module of claim 1, wherein, wherein the sealing gasket (4) is provided with a notch (41) at a position of the air outlets of the sensor assembly (3) for guiding the air outlets of the sensor assembly (3) and a negative pressure space inside the air purifier.

3. The air quality detection module of claim 2, wherein, The sensor box (2) is provided with a ventilation channel (23) at a position close to the air outlets of the sensor assembly (3), and the ventilation channel (23) connects the external environment with the negative pressure space inside the air purifier.

4. The air quality detection module of claim 1, wherein, The sealing gasket (4) at the edge position of the notch (41) forms a semi-enclosed structure for the joints between the air outlet channel (22) and the air outlets of the sensor assembly (3), and the open area of the notch (41) faces the open end of the ventilation channel (23).

5. The air quality detection module of any one of claims 1-4, wherein, The sealing gasket (4) is provided with a through hole on the surface, and the two ends of the through hole guide the air inlets of the air inlet channel (21) and the sensor assembly (3) respectively, and the cross-sectional area of the through hole is not less than the cross-sectional area of the air inlets of the air inlet channel (21) and the sensor assembly (3).

6. An air cleaner characterized by comprising: The sensor box (2) is externally fixedly provided with a decorative cover (1), and the decorative cover (1) is provided with a plurality of groups of communication holes on the surface for connecting the external environment with the channels on the surface of the sensor box (2).

7. The air cleaner of claim 6, wherein, The application further comprises the air quality detection module according to any one of claims 1-5. The application further comprises a relatively fixed shell, an air inlet bottom plate (5) and an impeller shell (6); The impeller shell (6) internally forms a first negative pressure cavity, and a region surrounded by the outer wall of the impeller shell (6), the air inlet bottom plate (5) and the shell forms a second negative pressure cavity; 8. The air cleaner of claim 7, wherein, A negative pressure channel (51) for connection is arranged between the first negative pressure cavity and the second negative pressure cavity, and the notch (41) guides the air outlets of the sensor assembly (3) and the second negative pressure cavity. A plurality of groups of protrusions (52) are arranged on different inner walls of the negative pressure channel (51) for changing the airflow direction and flow rate in the negative pressure channel (51).

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