CN108508152A - Air quality detector - Google Patents
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- CN108508152A CN108508152A CN201810281505.8A CN201810281505A CN108508152A CN 108508152 A CN108508152 A CN 108508152A CN 201810281505 A CN201810281505 A CN 201810281505A CN 108508152 A CN108508152 A CN 108508152A
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- 238000009413 insulation Methods 0.000 claims abstract description 9
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 claims abstract description 8
- 230000005855 radiation Effects 0.000 claims abstract description 7
- 238000001514 detection method Methods 0.000 claims description 7
- 238000010438 heat treatment Methods 0.000 abstract description 5
- 230000000694 effects Effects 0.000 abstract description 4
- 238000005259 measurement Methods 0.000 description 5
- 238000000034 method Methods 0.000 description 3
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical group [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 238000004378 air conditioning Methods 0.000 description 1
- 238000012937 correction Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
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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
- G01N33/0027—General constructional details of gas analysers, e.g. portable test equipment concerning the detector
- G01N33/0031—General constructional details of gas analysers, e.g. portable test equipment concerning the detector comprising two or more sensors, e.g. a sensor array
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Abstract
本申请公开了一种空气质量检测仪，包括：设有进风通道及出风通道的壳体，进风通道与出风通道相互隔离；设置于所述壳体内、用于固定电器元件的主板；设置于所述进风通道的入口处的温湿度传感器。本申请由于壳体的进风通道与出风通道相互隔离，将温湿度传感器至于进风通道入口处，使其远离内部发热器件及出风通道；进风通道内壁设置的锡箔层及海绵层，既阻隔了向内部的热辐射，又降低了进风通道内壁向温湿度传感器的热传导效率；壳体内设置用于隔热的双层真空套管，套管沿壳体内壁一圈设置，增加了信号线的长度，降低信号线与壳体内的热传导效应，同时套管首端及尾端形成与外界环境相同的气流，进一步减低信号线对温湿度传感器的影响。
The application discloses an air quality detector, comprising: a housing provided with an air inlet channel and an air outlet channel, the air inlet channel and the air outlet channel are isolated from each other; a main board arranged in the housing for fixing electrical components ; The temperature and humidity sensor arranged at the entrance of the air inlet channel. In this application, since the air inlet channel and the air outlet channel of the shell are isolated from each other, the temperature and humidity sensor is placed at the entrance of the air inlet channel to keep it away from the internal heating device and the air outlet channel; the tin foil layer and sponge layer set on the inner wall of the air inlet channel, It not only blocks the heat radiation to the inside, but also reduces the heat conduction efficiency from the inner wall of the air inlet channel to the temperature and humidity sensor; the housing is equipped with a double-layer vacuum sleeve for heat insulation, and the sleeve is arranged along the inner wall of the housing, increasing the The length of the signal line reduces the heat conduction effect between the signal line and the housing, and at the same time, the head and tail of the bushing form the same airflow as the external environment, further reducing the influence of the signal line on the temperature and humidity sensor.
Description
技术领域technical field
本申请涉及室内空气处理领域，尤其涉及一种空气质量检测仪。The application relates to the field of indoor air treatment, in particular to an air quality detector.
背景技术Background technique
室内空气调节系统而言，温湿度不仅是监测环境的重要参数，同时为其他气体传感器的测量结果修正提供支持，因此环境的温湿度准确测定至关重要。但是温湿度传感器易受到监测仪内部电子元器件、电池、电源芯片运转发热的影响，测量结果往往与被测环境的真实情况存在一定差异，导致测量结果不准确。现有的空气质量检测仪主要通过软件及硬件两种方式解决这一问题，软件方面，通过对设备发热规律的分析，拟定温湿度回归公式，但是这种方法不但大大增加设备标定成本，且无法预测设备实际运行下的发热变化，无法精准的修正温湿度的测量值；硬件方面，将温湿度传感器与监测仪主体分离，安装在设备电源导线上，避免设备发热的影响，但这种方式使得温湿度传感器成为游离于主体之外的外露模块，使得设备整体结构零散，严重影响设备安装和使用。For indoor air conditioning systems, temperature and humidity are not only important parameters for monitoring the environment, but also provide support for the correction of measurement results of other gas sensors. Therefore, accurate determination of the temperature and humidity of the environment is very important. However, the temperature and humidity sensor is easily affected by the heat generated by the electronic components, batteries, and power chips inside the monitor. The measurement results are often different from the real situation of the measured environment, resulting in inaccurate measurement results. Existing air quality detectors mainly solve this problem through software and hardware. In terms of software, the temperature and humidity regression formula is drawn up through the analysis of the heating rules of the equipment. However, this method not only greatly increases the cost of equipment calibration, but also cannot It is impossible to accurately correct the measured value of temperature and humidity by predicting the heat change under the actual operation of the equipment. In terms of hardware, the temperature and humidity sensor is separated from the main body of the monitor and installed on the power supply wire of the equipment to avoid the influence of equipment heat. The temperature and humidity sensor becomes an exposed module free from the main body, making the overall structure of the device fragmented, seriously affecting the installation and use of the device.
发明内容Contents of the invention
本发明提供一种空气质量检测仪，诣在解决现有空气质量检测仪温湿度传感器受内部元器件影响，导致测量不准确的问题。The invention provides an air quality detector, aiming to solve the problem that the temperature and humidity sensor of the existing air quality detector is affected by internal components, resulting in inaccurate measurement.
一种空气质量检测仪，包括：An air quality detector, comprising:
壳体，所述壳体设有进风通道及出风通道，所述进风通道与出风通道相互隔离；A casing, the casing is provided with an air inlet channel and an air outlet channel, and the air inlet channel and the air outlet channel are isolated from each other;
主板，所述主板设置于所述壳体内，用于固定电器元件；a main board, the main board is arranged in the housing for fixing electrical components;
温湿度传感器，所述温湿度传感器设置于所述进风通道的入口处。A temperature and humidity sensor, the temperature and humidity sensor is arranged at the entrance of the air inlet channel.
所述的空气质量检测仪，其中，所述主板上还设有PM2.5检测装置，所述 PM2.5检测装置设有进气口及出气口，所述进气口及出气口分别与所述进风通道及出风通道对接，所述PM2.5检测装置正对所述进气口处设有导流风扇。The air quality detector, wherein, the main board is also provided with a PM2.5 detection device, the PM2.5 detection device is provided with an air inlet and an air outlet, and the air inlet and the air outlet are respectively connected to the The air inlet channel and the air outlet channel are butted, and the PM2.5 detection device is provided with a diversion fan directly opposite the air inlet.
所述的空气质量检测仪，其中，所述温湿度传感器固定于所述进风通道内壁上，所述温湿度传感器与所述进风通道内壁之间还设有用于隔热的海绵层。The air quality detector, wherein the temperature and humidity sensor is fixed on the inner wall of the air inlet passage, and a sponge layer for heat insulation is also provided between the temperature and humidity sensor and the inner wall of the air inlet passage.
所述的空气质量检测仪，其中，所述海绵层与所述进风通道内壁之间设有用于反射热辐射的锡箔层。The air quality detector, wherein, a tin foil layer for reflecting heat radiation is provided between the sponge layer and the inner wall of the air inlet channel.
所述的空气质量检测仪，其中，所述温湿度传感器与所述主板通过信号线电连接，所述外壳内壁设有用于布线的套管。The air quality detector, wherein, the temperature and humidity sensor is electrically connected to the main board through a signal line, and the inner wall of the housing is provided with a sleeve for wiring.
所述的空气质量检测仪，其中，所述套管为双层真空隔热套管。The air quality detector, wherein, the casing is a double-layer vacuum insulation casing.
所述的空气质量检测仪，其中，所述隔热管沿着所述壳体内壁环绕一周设置。The air quality detector, wherein, the heat insulation pipe is arranged around the inner wall of the casing.
所述的空气质量检测仪，其中，所述套管首端与所述进风通道连通，尾端与所述出风通道连通。The air quality detector, wherein, the first end of the bushing communicates with the air inlet channel, and the tail end communicates with the air outlet channel.
所述的空气质量检测仪，其中，所述进风通道临近所述进气口处的侧壁设有使得进风通道向内收口的折边，所述套管的首端与所述折边相对设置。The air quality detector, wherein, the side wall of the air inlet passage adjacent to the air inlet is provided with a folded edge that makes the air inlet passage close inward, and the head end of the sleeve is connected to the folded edge. relative settings.
所述的空气质量检测仪，其中，所述进风通道与所述出风通道相垂直设置，或位于所述壳体两侧开口呈反方向设置。The air quality detector, wherein, the air inlet channel is arranged perpendicular to the air outlet channel, or the openings on both sides of the housing are arranged in opposite directions.
本发明所给出的一种空气质量检测仪，其壳体的进风通道与出风通道相互隔离，将温湿度传感器至于进风通道入口处，使其远离内部发热器件且避免受到出风通道热风的影响；进风通道内壁设置的锡箔层及海绵层，既阻隔了向内部的热辐射，又降低了进风通道内壁向温湿度传感器的热传导效率，避免壳体对温湿度传感器造成干扰；壳体内设置用于隔热的双层真空套管，套管沿壳体内壁一圈设置，增加了信号线的长度，降低信号线与壳体内的热传导效应，同时套管首端及尾端分别与进风通道及出风通道连通，另套管两端保持气压差，使得其内部形成与外界环境相同的气流，进一步减低信号线对温湿度传感器的影响。In the air quality detector provided by the present invention, the air inlet channel and the air outlet channel of the housing are isolated from each other, and the temperature and humidity sensor is placed at the entrance of the air inlet channel to keep it away from the internal heating device and avoid being affected by the air outlet channel. The influence of hot air; the tin foil layer and sponge layer set on the inner wall of the air inlet channel not only block the heat radiation to the inside, but also reduce the heat conduction efficiency from the inner wall of the air inlet channel to the temperature and humidity sensor, and avoid the shell from causing interference to the temperature and humidity sensor; The housing is equipped with a double-layer vacuum sleeve for heat insulation. The sleeve is arranged along the inner wall of the housing, which increases the length of the signal line and reduces the heat conduction effect between the signal line and the housing. At the same time, the head end and tail end of the sleeve are respectively It is connected with the air inlet channel and the air outlet channel, and the air pressure difference is maintained at both ends of the casing, so that the same airflow as the external environment is formed inside, and the influence of the signal line on the temperature and humidity sensor is further reduced.
附图说明Description of drawings
图1为空气质量检测仪的结构示意图；Fig. 1 is the structural representation of air quality detector;
图2为图1中内部结构的局部剖视图。Fig. 2 is a partial cross-sectional view of the internal structure in Fig. 1 .
具体实施方式Detailed ways
下面通过具体实施方式结合附图对本申请作进一步详细说明。The present application will be described in further detail below through specific embodiments in conjunction with the accompanying drawings.
本实施例所提供的空气质量检测仪，如图1-图2所示，包括，壳体1及设置于壳体1内部的主板(图中未示出)。壳体1设有进风通道2及出风通道3，主板上固定有PM2.5传感器4、控制芯片、电源等电器元件。其中，进风通道2 与出风通道3相互密封隔离，进风通道2的入口处设置有温湿度传感器5。进风通道2与出风通道3相互隔离，避免壳体1内部与外部混风。将温湿度传感器5 至于进风通道2入口处，使其远离内部发热器件(主板及其上设置的电器元件)，避免受到出风通道3流出的热风干扰。The air quality detector provided in this embodiment, as shown in FIGS. 1-2 , includes a housing 1 and a main board (not shown) disposed inside the housing 1 . The casing 1 is provided with an air inlet channel 2 and an air outlet channel 3, and PM2.5 sensor 4, control chip, power supply and other electrical components are fixed on the main board. Wherein, the air inlet passage 2 and the air outlet passage 3 are sealed and isolated from each other, and a temperature and humidity sensor 5 is arranged at the entrance of the air inlet passage 2 . The air inlet passage 2 and the air outlet passage 3 are isolated from each other, so as to avoid air mixing inside and outside the casing 1 . Put the temperature and humidity sensor 5 at the entrance of the air inlet channel 2, so that it is far away from the internal heating device (the main board and the electrical components arranged on it), and avoid being disturbed by the hot air flowing out of the air outlet channel 3.
PM2.5传感器4具有一个进气口41及出气口42，进气口41与进风通道2 连通，出气口42与出风通道3连通。其中，进气口41正对进风通道2处设有导流风扇(图中未示出)，这样，在导流风扇的作用下，外空气依次通过进风通道2、进气口41出气口42、出风通道3形成一个循环风道(如图中箭头所示)，对壳体1内的元器件起到散热的作用。The PM2.5 sensor 4 has an air inlet 41 and an air outlet 42 , the air inlet 41 communicates with the air inlet channel 2 , and the air outlet 42 communicates with the air outlet channel 3 . Wherein, the air inlet 41 is provided with a diversion fan (not shown in the figure) facing the air inlet passage 2, so that, under the action of the diversion fan, the outside air passes through the air inlet passage 2 and the air inlet 41 successively. The air port 42 and the air outlet channel 3 form a circulating air channel (as shown by the arrow in the figure), which can dissipate heat from the components in the housing 1 .
温湿度传感器5固定在进风通道2临近入口处的内壁上，为了降低进风通道2内壁对其产生热干扰，进风通道2内壁上设有锡箔层21，锡箔层21表面固定有海绵层22，温湿度传感器5固定于海绵层22表面。锡箔层21能够将来自进风通道内壁的热辐射及时反射出去，海绵层22阻隔了进风通道2与温湿度传感器5之间的热传导效应，这样从间接的热辐射及直接的热传导两种形式上降低了进风通道2对温湿度传感器的干扰，使其与外界环境保持一致。The temperature and humidity sensor 5 is fixed on the inner wall near the entrance of the air inlet channel 2. In order to reduce the thermal interference on the inner wall of the air inlet channel 2, a tin foil layer 21 is arranged on the inner wall of the air inlet channel 2, and a sponge layer is fixed on the surface of the tin foil layer 21. 22. The temperature and humidity sensor 5 is fixed on the surface of the sponge layer 22. The tin foil layer 21 can reflect the heat radiation from the inner wall of the air inlet channel in time, and the sponge layer 22 blocks the heat conduction effect between the air inlet channel 2 and the temperature and humidity sensor 5, so that two forms of indirect heat radiation and direct heat conduction The interference of the air inlet channel 2 on the temperature and humidity sensor is reduced, so that it is consistent with the external environment.
温湿度传感器5通过信号线51与主板电连接，传统的布线方式无法避免的出现信号线51的铜芯将主板的温度传递至温湿度传感器5，使其测量结果出现偏差。为了解决这一问题，本实施例沿着壳体1内壁设置一圈用于布线的套管6，该套管6为双层真空隔热套管，其内壁为内部抽真空的双层结构，具有极低的热传导率。套管6将信号线51与壳体1内部隔离开来，避免热量传递至信号线 5。The temperature and humidity sensor 5 is electrically connected to the main board through the signal line 51, and the copper core of the signal line 51 cannot avoid the traditional wiring method to transmit the temperature of the main board to the temperature and humidity sensor 5, causing deviations in the measurement results. In order to solve this problem, a sleeve 6 for wiring is arranged along the inner wall of the housing 1 in this embodiment. The sleeve 6 is a double-layer vacuum heat insulation sleeve, and its inner wall is a double-layer structure with internal vacuum. Has extremely low thermal conductivity. The sleeve 6 isolates the signal line 51 from the inside of the housing 1 to prevent heat transfer to the signal line 5.
套管6首端61穿过进风通道2的一个侧壁与进风通道2连通，尾端62穿过出风通道3的侧壁与出风通道3连通。主板上用于连接温湿度传感器5的接线端子52穿过出风通道3并固定在其内壁上，信号线51的接线端由出风通道穿出并与该接线端子52电连接。由于位于出风通道3内的信号线51及接线端子52均贴附在出风通道3的内壁表面，因而不会对排风起到干扰。进风通道2 另一个侧壁临近进气口41处向内弯折的折边23，使得进风通道在此处形成与进气口41大小相适应的缩口。套管6的首端61设置在与该折边23相对应的另一侧内壁上，这样，当气流通过缩口向进气口41汇聚时就产生一部分风量，使得部分气流从套管6的首端61进入，并在套管6内部绕壳体1内壁一周再从套管 6的尾端62排入出风通道3。由于套管6的两端分别与进风通道2及出风通道3 连通，使得套管6两端形成与进风通道2及出风通道3相同的气压差，这样套管6内就形成较为动力稳定的循环气流，且该循环气流能够带走套管6内部微弱的热量，使套管6与外部环境的温湿度基本保持一致，使得套管6内的信号线51无法对温湿度传感器5产生影响。The head end 61 of the sleeve 6 communicates with the air inlet channel 2 through a side wall of the air inlet channel 2 , and the tail end 62 communicates with the air outlet channel 3 through a side wall of the air outlet channel 3 . The connection terminal 52 on the main board for connecting the temperature and humidity sensor 5 passes through the air outlet channel 3 and is fixed on the inner wall thereof. Since the signal wires 51 and the connection terminals 52 in the air outlet channel 3 are attached to the inner wall surface of the air outlet channel 3 , they will not interfere with the exhaust air. The other side wall of the air inlet passage 2 is the inwardly bent flange 23 adjacent to the air inlet 41 , so that the air inlet passage forms a constriction suitable for the size of the air inlet 41 here. The head end 61 of sleeve pipe 6 is arranged on the other side inner wall corresponding to this flange 23, like this, just produces a part of air volume when air-flow converges to air inlet 41 through constriction, makes part of air-flow from sleeve pipe 6 The head end 61 enters, and goes around the inner wall of the casing 1 in the casing 6 and then discharges into the air outlet channel 3 from the tail end 62 of the casing 6 . Because the two ends of the sleeve pipe 6 communicate with the air inlet passage 2 and the air outlet passage 3 respectively, the two ends of the sleeve pipe 6 form the same air pressure difference as the air inlet passage 2 and the air outlet passage 3, so that a comparatively small air pressure is formed in the sleeve pipe 6. Dynamic and stable circulating air flow, and the circulating air flow can take away the weak heat inside the bushing 6, so that the temperature and humidity of the bushing 6 and the external environment are basically consistent, so that the signal line 51 in the bushing 6 cannot control the temperature and humidity sensor 5 make an impact.
为了避免出风通道3排出的气流再度被进风通道2吸入，影响温湿度传感器5的准确检测，进风通道2与出风通道3相垂直设置，或分别位于可以两侧开口方向相反设置。In order to prevent the airflow discharged from the air outlet channel 3 from being inhaled again by the air inlet channel 2 and affect the accurate detection of the temperature and humidity sensor 5, the air inlet channel 2 and the air outlet channel 3 are arranged perpendicular to each other, or they can be located at opposite directions of openings on both sides.
本发明所给出的一种空气质量检测仪，其壳体的进风通道与出风通道相互隔离，将温湿度传感器至于进风通道入口处，使其远离内部发热器件且避免受到出风通道热风的影响；进风通道内壁设置的锡箔层及海绵层，既阻隔了向内部的热辐射，又降低了进风通道内壁向温湿度传感器的热传导效率，避免壳体对温湿度传感器造成干扰；壳体内设置用于隔热的双层真空套管，套管沿壳体内壁一圈设置，增加了信号线的长度，降低信号线与壳体内的热传导效应，同时套管首端及尾端分别与进风通道及出风通道连通，另套管两端保持气压差，使得其内部形成与外界环境相同的气流，进一步减低信号线对温湿度传感器的影响。In the air quality detector provided by the present invention, the air inlet channel and the air outlet channel of the housing are isolated from each other, and the temperature and humidity sensor is placed at the entrance of the air inlet channel to keep it away from the internal heating device and avoid being affected by the air outlet channel. The influence of hot air; the tin foil layer and sponge layer set on the inner wall of the air inlet channel not only block the heat radiation to the inside, but also reduce the heat conduction efficiency from the inner wall of the air inlet channel to the temperature and humidity sensor, and avoid the shell from causing interference to the temperature and humidity sensor; The housing is equipped with a double-layer vacuum sleeve for heat insulation. The sleeve is arranged along the inner wall of the housing, which increases the length of the signal line and reduces the heat conduction effect between the signal line and the housing. At the same time, the head end and tail end of the sleeve are respectively It is connected with the air inlet channel and the air outlet channel, and the air pressure difference is maintained at both ends of the casing, so that the same airflow as the external environment is formed inside, and the influence of the signal line on the temperature and humidity sensor is further reduced.
以上内容是结合具体的实施方式对本申请所作的进一步详细说明，不能认定本申请的具体实施只局限于这些说明。对于本申请所属技术领域的普通技术人员来说，在不脱离本申请发明构思的前提下，还可以做出若干简单推演或替换。The above content is a further detailed description of the present application in conjunction with specific implementation modes, and it cannot be considered that the specific implementation of the present application is limited to these descriptions. For those of ordinary skill in the technical field to which the present application belongs, some simple deduction or replacement can also be made without departing from the inventive concept of the present application.
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Application publication date: 20180907 |