Gas pretreatment device for PN analyzer

Abstract

The utility model relates to the technical field of PN analysis, and provides a gas pretreatment device for a PN analyzer, the gas pretreatment device and a rear cover plate are integrally arranged, the gas pretreatment device comprises a filter and a volatile particle remover, the rear cover plate is provided with a filter cavity for placing the filter, and the volatile particle remover is arranged in the filter cavity. And the volatile particle remover is arranged on the outer wall of the filter cavity. The filter is arranged in the filter cavity, the volatile particle remover is arranged outside the filter cavity, and the air suction fans are arranged at the positions, connected with the heat dissipation blocks, of the air inlet end and the air outlet end of the volatile particle remover. The hot air emitted by the volatile particle remover is absorbed into the filter cavity for heating the filter cavity, so that the problem of instrument blockage caused by icing of water vapor in the filter under the low-temperature condition is solved. And the problem of environmental adaptability of the analyzer is solved by utilizing the heat dissipation of the volatile particle remover.

Description

Technical Field

[0001] This utility model relates to the field of PN analysis technology, and in particular to a gas pretreatment device for a PN analyzer. Background Technology

[0002] In recent years, with the increase in the number of motor vehicles, motor vehicle emissions have gradually become the main source of air pollution. Especially in some large cities and densely populated areas in the east, mobile sources contribute as much as 20%-40% to the concentration of fine particulate matter. At the same time, since most motor vehicles drive in densely populated areas, exhaust emissions directly threaten human health. In order to better control motor vehicle emissions, motor vehicle PN analyzers are used to analyze the concentration of particulate matter in exhaust emissions. However, most of the current motor vehicle PN analyzers are developed based on DC technology, and their operating environment is basically 0-45°C and 80% humidity. They cannot meet the requirements for use in the cold conditions in northern China, and the instruments are prone to failure in the high temperature and high humidity environment in the south. The main reasons are: (1) When the temperature is too low, the water vapor inside the filter exposed outside the instrument will freeze, which will cause the instrument to become blocked; (2) Because there is a high temperature heating component (volatile particulate remover, abbreviated as VPR) inside the instrument, the instrument is prone to heat generation, and the high temperature environment will lead to a decrease in the high temperature adaptability of the instrument; (3) The motor vehicle PN analyzer based on DC technology uses the high voltage discharge principle to charge PN particles, which is prone to failure in the high humidity environment. Utility Model Content

[0003] To solve the above problems, this utility model provides the following technical solution:

[0004] This invention provides a gas pretreatment device for a PN analyzer. The PN analyzer includes a housing, which comprises a front cover, an upper cover, a rear cover, and a bottom plate. The gas pretreatment device is integrally formed with the rear cover and includes a filter and a volatile particulate remover. The rear cover has a filter chamber for housing the filter, and the volatile particulate remover is disposed on the outer wall of the filter chamber. Currently, filters are exposed outside the PN analyzer. When the temperature is too low, the water vapor inside the filter freezes, causing instrument blockage. The volatile particulate remover easily generates heat, and the combined effect in high-temperature environments reduces the instrument's high-temperature adaptability. Therefore, this application provides a filter chamber on the rear cover, into which the filter is placed, and the volatile particulate remover is disposed on the outer wall of the filter chamber. The heat generated by the volatile particulate remover provides heat to the filter, solving the problem of instrument blockage caused by water vapor freezing inside the filter at low temperatures. It also makes reasonable use of the heat generated by the volatile particulate remover, solving the problem of reduced PN analyzer adaptability due to high temperatures caused by the volatile particulate remover. In addition, the volatile particulate remover provides heat to dry the humidity of the heated filter chamber and the air inlet of the filter, thereby enhancing the filter's adaptability to humid environments.

[0005] Furthermore, the opening of the filter chamber is located on the outside of the rear cover plate, which facilitates filter replacement.

[0006] Furthermore, the cavity opening is provided with a cavity opening cover. One end of the cavity opening cover is rotatably connected to the rear cover plate, and the other end of the cavity opening cover may be provided with a buckle. Alternatively, a buckle may be provided at the cavity opening, and a buckle may be provided at the other end of the cavity opening cover, allowing the cavity opening cover to be fixed through the cooperation of the buckle and the buckle. Magnets may also be provided on both the cavity opening cover and the cavity opening for magnetic attraction. A door lock may also be provided on the cavity opening cover to lock it in place, or other methods may be used to fix the cavity opening cover. When the filter needs to be replaced, the cavity opening cover can be opened directly for replacement.

[0007] Furthermore, when the cavity cover is placed on the cavity, the plane on which the cavity cover is located is flush with the plane on the outer side of the rear cover plate.

[0008] Furthermore, heat dissipation blocks are fitted at both the inlet and outlet ends of the volatile particulate remover to accelerate the heat dissipation of the volatile particulate remover.

[0009] Furthermore, the filter chamber is provided with a fan placement hole, and an air intake fan is provided in the fan placement hole. The air intake fan is configured to draw the hot air emitted by the heat sink into the filter chamber. Specifically, the air intake fan is set close to the heat sink to maximize the intake of the hot air emitted by the heat sink into the filter chamber and provide heat to the filter.

[0010] Furthermore, the filter chamber is provided with a connector placement hole for placing a filter connector.

[0011] Furthermore, the rear cover plate is also equipped with a power switch socket to provide power to the PN analyzer.

[0012] Furthermore, the rear cover plate is also provided with a communication interface for communication connection with external instruments.

[0013] Furthermore, the rear cover is also equipped with a fan to dissipate heat from the PN analyzer housing, and the fan is also equipped with a dust filter to prevent dust from entering the fan.

[0014] This utility model has the following beneficial effects:

[0015] (1) This utility model places the filter inside the filter cavity and the volatile particle remover outside the filter cavity. A suction fan is provided at the inlet and outlet of the volatile particle remover where heat dissipation blocks are connected. The hot air emitted by the volatile particle remover is absorbed into the filter cavity to heat the filter cavity, thus solving the problem of instrument blockage caused by water vapor freezing inside the filter at low temperatures.

[0016] (2) The volatile particle remover in this utility model provides heat to dry the humidity of the heated filter chamber and the air inlet of the filter, thereby enhancing the filter's adaptability to humidity environment;

[0017] (3) This utility model solves the environmental adaptability problem of the analyzer by utilizing the heat dissipation of the volatile particle remover itself without increasing the cost of the existing analyzer.

[0018] (4) By connecting heat sinks and suction fans to both the inlet and outlet of the volatile particulate remover, this utility model can help dissipate heat, reduce the internal temperature of the volatile particulate remover, and improve its high-temperature adaptability. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the front structure of the placement plate in this utility model.

[0020] Figure 2 This is a schematic diagram of the front structure of the placement plate when the baffle is in the open state in this utility model.

[0021] Figure 3 A schematic diagram of the back structure of the placement plate of this utility model. Detailed Implementation

[0022] The specific embodiments of this utility model are described in detail below with reference to the accompanying drawings. It should be noted that the embodiments are only specific descriptions of the utility model and should not be regarded as limitations on the utility model. The purpose of the embodiments is to enable those skilled in the art to better understand and reproduce the technical solution of this utility model. The protection scope of this utility model should still be determined by the scope defined in the claims.

[0023] like Figure 1-3 As shown, this utility model provides a gas pretreatment device for a PN analyzer. The PN analyzer includes a housing, which includes a front cover plate, an upper cover plate, a rear cover plate 1, and a bottom plate. The gas pretreatment device is integrally formed with the rear cover plate 1. The gas pretreatment device includes a filter 2 and a volatile particle remover 3. The rear cover plate 1 is provided with a filter chamber 11 for placing the filter 2. The volatile particle remover 3 is disposed on the outer wall of the filter chamber 11. Currently, filters are exposed outside the PN analyzer. When the temperature is too low, the water vapor inside the filter freezes, causing instrument blockage. The volatile particulate remover (VPL) is prone to generating heat, and the cumulative effect of high temperatures reduces the instrument's high-temperature adaptability. Therefore, this application provides a filter chamber 11 on the rear cover plate 1. The filter 2 is placed inside the filter chamber 11, and the VPL 3 is placed on the outer wall of the filter chamber 11. The heat generated by the VPL 3 provides heat to the filter 2, solving the problem of instrument blockage caused by water vapor freezing inside the filter 2 at low temperatures. It also makes reasonable use of the heat generated by the VPL 3, solving the problem of reduced PN analyzer adaptability due to high temperatures caused by the VPL 3. Furthermore, the heat provided by the VPL 3 can also dry the humidity of the heated filter chamber and the filter's clean air inlet, thereby enhancing the filter's adaptability to humidity environments.

[0024] like Figure 1-2 As shown, the filter chamber 11 has an opening 111 on the outside of the rear cover plate 1. An opening cover 112 is provided at the opening 111. One end of the opening cover 112 is rotatably connected to the rear cover plate 1, and the other end of the opening cover 112 can have a buckle. Alternatively, the opening 111 can have a slot, and the other end of the opening cover can also have a slot. The opening cover 112 is fixed by the cooperation of the buckle and the slot. Magnets can also be provided on the opening cover and the chamber, allowing for magnetic fixation. A door lock 113 can also be provided on the opening cover 112 to lock it to the opening 111, or other methods can be used to fix the opening cover 112. When the filter 2 needs to be replaced, the opening cover 112 can be opened directly for replacement. When the opening cover 112 is on the opening 111, the plane of the opening cover 112 is flush with the plane of the outer side of the rear cover plate 1.

[0025] like Figure 3 As shown, heat dissipation blocks 4 are fitted on both the air inlet and outlet of the volatile particulate remover 3 to accelerate the heat dissipation of the volatile particulate remover 3.

[0026] The filter chamber 11 is provided with a fan mounting hole 114, and an intake fan 5 is installed inside the fan mounting hole 114. The intake fan 5 is configured to draw the hot air emitted by the heat sink 4 into the filter chamber 11. Specifically, the intake fan 5 is positioned close to the heat sink 4 to maximize the intake of the hot air emitted by the heat sink 4 into the filter chamber 11, thereby providing heat to the filter 2. The filter chamber 11 is also provided with a connector mounting hole 115 for accommodating a filter connector.

[0027] The rear cover plate 1 is also equipped with a power switch socket 6 to provide power to the PN analyzer; a communication interface 7 for communication connection with external instruments; and a fan 8 to dissipate heat from the PN analyzer housing. The fan 8 is also equipped with a dust filter 9 to prevent dust from entering the fan.

[0028] Although preferred embodiments of this application have been described, those skilled in the art, upon learning the basic inventive concept, can make other changes and modifications to these embodiments. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments as well as all changes and modifications falling within the scope of this application.

[0029] It should be noted that any technical features not described in detail in this utility model can be implemented by any existing technology.

Claims

1. A gas pretreatment device for a PN analyzer, the PN analyzer comprising a housing, the housing including a front cover plate, an upper cover plate, a rear cover plate, and a bottom plate, characterized in that, The gas pretreatment device is integrally formed with the rear cover plate. The gas pretreatment device includes a filter and a volatile particle remover. The rear cover plate is provided with a filter chamber for placing the filter, and the volatile particle remover is disposed on the outer wall of the filter chamber.

2. The gas pretreatment device for a PN analyzer according to claim 1, characterized in that, The opening of the filter chamber is located on the outside of the rear cover plate.

3. A gas pretreatment device for a PN analyzer according to claim 2, characterized in that, The cavity opening is provided with a cavity opening cover, one end of which is rotatably connected to the rear cover plate.

4. A gas pretreatment device for a PN analyzer according to claim 3, characterized in that, When the cavity cover is placed on the cavity opening, the plane of the cavity cover is flush with the plane of the outer side of the rear cover plate.

5. A gas pretreatment device for a PN analyzer according to claim 1, characterized in that, Both the inlet and outlet ends of the volatile particle remover are fitted with heat sinks.

6. A gas pretreatment device for a PN analyzer according to claim 5, characterized in that, The filter chamber is provided with a fan placement hole, and an air intake fan is provided in the fan placement hole. The air intake fan is configured to draw the hot air emitted by the heat sink into the filter chamber.

7. A gas pretreatment device for a PN analyzer according to claim 1, characterized in that, The filter chamber is provided with a connector placement hole, which is used to place the filter connector.

8. A gas pretreatment device for a PN analyzer according to claim 1, characterized in that, The rear cover plate is also equipped with a power switch socket.

9. A gas pretreatment device for a PN analyzer according to claim 1, characterized in that, The rear cover is also equipped with a communication interface.

10. A gas pretreatment device for a PN analyzer according to claim 1, characterized in that, The rear cover is also equipped with a fan, and the fan is also equipped with a dustproof net.

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