CN210638906U - A performance testing device for fresh air purifiers providing a micro-positive pressure testing environment - Google Patents

Abstract

The utility model provides a fresh air purifier performance testing device for providing a micro-positive pressure test environment, comprising: a test simulation cabin for simulating an indoor environment in actual use; an upstream pollutant generating device, one end of which is connected to a fresh air purifier prototype At the fresh air inlet, the other end is communicated with the air outside the cabin, which is used to transport the pollutants generated upstream to the test simulation cabin; the auxiliary fan device is connected to the test simulation cabin through connecting pipes, and is used to adjust the test simulation cabin. The pressure difference between the inside and outside of the test chamber; the exhaust system device, one end is connected to the outside air outlet of the fresh air purifier prototype, and the other end is connected to the outside air, which is used to exhaust the air in the test simulation cabin to the outside of the cabin; among them, during the test process The test simulation cabin can maintain a slightly positive pressure state, and the pressure difference between the inside and outside of the test simulation cabin is constant and adjustable between 5-20Pa, which makes the fresh air purifier test close to the working state of actual use and improves the accuracy of the test results. sex and stability.

Description

A performance testing device for fresh air purifiers providing a micro-positive pressure testing environment

technical field

The utility model relates to the field of fresh air purifiers, in particular to a performance testing device for fresh air purifiers that provides a micro-positive pressure test environment.

Background technique

With the continuous improvement of living standards, people put forward higher requirements for a healthy living environment, especially indoor air quality. Affected by the decline of outdoor air quality and the change of temperature and humidity, the doors and windows of workplaces and family living rooms are often closed, and factors such as the gathering of people, the release of pollutants from decoration materials, and poor air mobility can easily cause indoor air pollution. Serious threat to human health.

The fresh air purifier introduces the filtered outdoor fresh air into the room through the fan, and discharges the indoor dirty air to the outdoor, so as to replace the indoor and outdoor air to improve the indoor air quality. At present, the main performance evaluation indicators of fresh air purifiers include fresh air purification efficiency and clean fresh air volume. Among them, the clean fresh air volume is the result of the combined effect of the fresh air purification efficiency and the fresh air volume, which can be used as the basis for determining the applicable area of the fresh air purifier. Generally speaking, the larger the clean fresh air volume, the larger the air purification capacity and applicable area of the fresh air purifier, but the actual purification efficiency of the fresh air purifier still needs to be considered. Therefore, the fresh air purifier manufacturers often only claim the applicable area based on the fresh air volume without considering the actual purification efficiency and other factors, which are incomplete and lack scientific theoretical support and systematic experimental verification.

The performance test device of the existing fresh air purifier ignores the influence of parameters such as the pressure inside and outside the system, the volume of fresh air, the relative position between the indoor air supply and exhaust, and the size of the test space on the indoor pollutant concentration flow field distribution, and the sampling points are all Whether the measured concentration can represent the diffusion and transmission characteristics of pollutants in actual use needs further verification, and the performance of the fresh air purifier cannot be scientifically and systematically simulated and evaluated without the mass balance of pollutants. The determined fresh air purifier is suitable for There is a large error in the area, which can easily lead to problems such as excessive clean fresh air volume, waste of installation cost, floor space and energy consumption, and too low clean fresh air volume to meet the needs of purifying indoor air.

Utility model content

(1) Technical problems to be solved

The utility model provides a performance testing device for a fresh air purifier that provides a micro-positive pressure testing environment, so as to at least partially solve the above-mentioned technical problems.

(2) Technical solutions

According to one aspect of the present utility model, there is provided a fresh air purifier performance testing device that provides a micro-positive pressure testing environment, including:

A test simulation cabin, the test simulation cabin is used to simulate the indoor environment in actual use, and the prototype of the fresh air purifier to be tested is set inside it;

An upstream pollutant generating device, one end of the upstream pollutant generating device is connected to the fresh air inlet of the fresh air purifier prototype through an outside fresh air inlet pipe, and the other end is communicated with the outside air through a pipe, which is used for upstream pollutants. The pollutants are transported to the test simulation cabin;

an auxiliary fan device, the auxiliary fan device is connected to the test simulation cabin through a connecting pipe, and is used to adjust the internal and external pressure difference of the test simulation cabin;

An exhaust system device, one end of the exhaust system device is connected to the outside air outlet of the fresh air purifier prototype through an outside exhaust pipe, and the other end is connected to the outside air through a pipe, which is used for the test simulation cabin. The air is exhausted to the outside of the cabin;

Among them, in the test process, the test simulation cabin can maintain a slightly positive pressure state, the positive pressure difference inside and outside the cabin of the test simulation cabin is constant and adjustable between 5-20Pa, and the fluctuation range does not exceed 2Pa.

Further, the test simulation cabin is also provided with:

The air return pipe in the cabin is connected to the air inlet in the cabin of the prototype fresh air purifier to be tested, and is used to send the air in the cabin into the prototype fresh air purifier;

The air supply pipe in the cabin is connected to the air supply port in the cabin of the fresh air purifier prototype, and is used for sending the air purified by the fresh air purifier prototype to the test simulation cabin; the air supply pipe in the cabin is provided with:

The air supply pipe regulating valve in the cabin is used to adjust the static pressure of the air supply port in the fresh air purification engine room by adjusting the opening degree of the valve;

The static pressure measurement point of the air supply port in the cabin is used to monitor the static pressure of the air supply port in the fresh air purification engine room.

Further, the test simulation cabin is also provided with:

a stirring fan, the stirring fan is fixedly connected to the inner top surface of the test simulation cabin, and is used for improving the fluidity of the air in the test simulation cabin;

The concentration measuring point in the cabin, the concentration measuring point in the cabin is used to monitor the concentration of pollutants in the experimental simulation cabin;

The test simulates the pressure differential pressure measuring points inside and outside the cabin, and the test simulated pressure differential pressure measuring points inside and outside the cabin are used for the single-point method to test the pressure difference inside and outside the simulated cabin;

The pollutant injection port in the cabin is used to realize the occurrence of the initial concentration of the pollutant background in the test simulation cabin.

Further, the auxiliary fan device includes:

Auxiliary fan, the auxiliary fan is an exhaust fan, connected to the connecting pipe, and used to adjust the pressure difference inside and outside the test simulation cabin, so that the pressure difference inside and outside the test simulation cabin can be maintained at a constant value;

Auxiliary fan control valve, the auxiliary fan control valve is installed in the connecting pipe, and is used to maintain the test simulation cabin in a slightly positive pressure state by adjusting the size of the valve opening.

Further, the auxiliary fan further includes a frequency converter, which is used to adjust the air volume according to the change of the pressure difference outside the simulated cabin.

Further, the upstream pollutant generating device includes a particulate filter, a gaseous pollutant purification device, a humidifier, a blower, a pollutant injection device, a flow meter, a static pressure measuring point at the fresh air inlet, a fresh air upstream concentration measuring point and a cabin, which are arranged in sequence. Outside fresh air intake duct; among them,

The particulate filter and the gaseous pollutant purification device are arranged at the air inlet outside the cabin to ensure the cleanliness of the air intake outside the cabin and the requirement that the concentration of the test target pollutants is controllable;

The humidifier is used to ensure the humidity of the air intake outside the cabin;

The blower is fixedly connected in the fresh air intake duct connected to the test simulation cabin to compensate for the loss of fresh air intake volume caused by the increased wind resistance caused by the installation of the duct;

The pollutant injection device is used to generate the upstream concentration of the fresh air inlet of the fresh air purifier prototype to simulate outdoor atmospheric pollution;

The flow meter is fixed in the fresh air intake pipe outside the test simulation cabin, and is used to read the fresh air intake air volume of the fresh air purifier prototype;

The static pressure measurement point of the fresh air inlet and the fresh air upstream concentration measurement point are all set on the fresh air inlet pipe near the air inlet of the fresh air purifier.

Further, the exhaust system device includes:

The static pressure measurement point of the air outlet outside the cabin is arranged on the air outlet outside the cabin at the air outlet outside the cabin of the prototype of the fresh air purifier, and is used to monitor the pressure of the air outlet of the fresh air purifier;

The outside exhaust pipe regulating valve, which is installed at a predetermined position in the outside exhaust pipe pipe, is used to adjust the opening of the outside exhaust pipe regulating valve to adjust the fresh air purifier The size of the exhaust air volume.

Further, the exhaust system device also includes:

The exhaust pipe of the test simulation cabin is connected to the exhaust pipe outside the cabin through the regulating valve of the exhaust pipe outside the cabin;

The pressure measuring point in the exhaust duct of the experimental simulation cabin is set in the exhaust duct of the experimental simulation cabin to monitor the resistance in the exhaust duct of the fresh air purifier.

Further, the pressure measurement points in the test simulation cabin exhaust duct and the static pressure measurement points of the air outlet outside the cabin are tested by static pressure ring.

Further, the exhaust ducts outside the cabin and the exhaust air of the auxiliary fans are connected to the exhaust ducts of the experimental simulation cabin, and the exhaust ducts of the experimental simulation cabins are provided with filtering devices to filter and exhaust the air.

(3) Beneficial effects

It can be seen from the above technical solutions that the utility model provides a performance testing device for fresh air purifiers in a micro-positive pressure test environment, which has at least one of the following beneficial effects:

(1) The pressure difference inside and outside the test simulation cabin can be automatically adjusted by the auxiliary fan device, and the pressure difference between the inside and outside of the test simulation cabin is constant at a certain value between 5-20Pa, so as to ensure that the test simulation cabin is in a state of slight positive pressure, and simulate the indoor environment during actual use. The external pressure difference prevents the outside air from infiltrating into the cabin during the test process and interferes with the performance test or the actual use of the fresh air purifier;

(2) There are regulating valves and pressure measuring points in the air supply and outside air outlet pipes of the fresh air purification engine room. By monitoring the pressure measuring points, the regulating valve can make the fresh air purifier reach the rated working state;

(3) There are static pressure measuring points in the fresh air intake duct outside the fresh air purification engine room and in the exhaust duct of the test simulation cabin to monitor the pressure in the pipeline and adjust it to reduce the interference caused by the increase of resistance due to the installation of the pipeline during the test process;

(4) A blower and a flow meter are installed in the upstream pollutant generating device of the fresh air purifier. The blower can be used to compensate the fresh air intake of the fresh air blower, so that it can reach the working state of actual use during the test. The flow meter monitors the fresh air intake of the fresh air purifier in real time. The air volume ensures the stable air volume and wind speed, so that the upstream target pollutant concentration occurs stably, and the accuracy and stability of the test results are improved.

Description of drawings

FIG. 1 is a schematic structural diagram of a fresh air purifier performance testing device that provides a micro-positive pressure testing environment according to an embodiment of the present invention.

[Description of the main components of the embodiment of the present utility model in the accompanying drawings]

1. Test simulation cabin; 2. Upstream pollutant generating device; 3. Auxiliary fan device; 4. Exhaust system device; 5. Fresh air purifier prototype; 6. Test bench; 7. Stirring fan; Point C; 9. Test point P3 for the pressure difference between inside and outside the cabin; 10. The pollutant input port in the cabin; 11. The air supply pipe in the cabin; 12. The air return pipe in the cabin; 13. The static pressure measurement of the air supply port in the cabin Point P2; 14. Control valve of air supply pipe in the cabin; 15. Fresh air intake pipe outside the cabin; 16. Particulate matter filter; 17. Gaseous pollutant purification device; 18. Humidifier; Device; 21. Flowmeter; 22. Static pressure measuring point P1 at the fresh air inlet; 23. Upstream concentration measuring point C1; 24. Connecting pipeline; 25. Auxiliary fan; ; 28. The static pressure measuring point P5 of the air outlet outside the cabin; 29. The regulating valve of the outside exhaust pipe; 30. The exhaust pipe of the test simulation cabin; 31. The pressure measuring point P4 of the exhaust pipe of the test simulation cabin.

Detailed ways

The utility model provides a performance testing device for a fresh air purifier that provides a micro-positive pressure test environment, which is used to simulate the process of the fresh air purifier providing fresh air in a micro-positive pressure environment during actual use, and the performance of the fresh air purifier through the performance of the fresh air purifier. The test device can obtain the actual fresh air purification efficiency, clean fresh air volume and other parameters of the fresh air purifier to be tested, and calculate the applicable area of the fresh air purifier under the load of outdoor pollutants and indoor pollutants based on the pollutant mass balance.

Before describing the solution to the problem, it is helpful to define the definitions of some specific words. "Micro-positive pressure" is a concept mainly aimed at fresh air systems, and its parallel concept is negative pressure fresh air systems, both of which belong to forced ventilation. The purification principle of the micro-positive pressure fresh air system is that under the action of the fan, the outdoor air is continuously sucked into the fresh air system, and filtered by various filters to remove harmful substances such as particulate matter in the outdoor atmosphere, and clean air is sent indoors , so that the indoor pressure is higher than the outdoor, and the indoor dirty air is discharged to the outdoor through the ventilator or various building gaps, thereby improving the indoor air quality. Micro negative pressure fresh air refers to the continuous discharge of indoor dirty air to the outside through the fan, so that the indoor air forms a negative pressure. Under the action of this pressure, the outdoor fresh air enters the air through the wall-type air inlet or the window-type air inlet. The device is directly introduced into the room, thereby improving the indoor air quality. Compared with the micro negative pressure fresh air, the micro positive pressure fresh air has higher purification efficiency, more uniform air purification, and easier control of indoor temperature distribution.

Under normal circumstances, the positive pressure value generated by the micro positive pressure fresh air system is between a few Pa and tens of Pa. The size of the positive pressure value is related to the air output of the fresh air system and the sealing of the building. Usually the positive pressure value is proportional to the square of the air outlet volume, and the better the sealing performance, the greater the positive pressure value can be provided.

In order to make the purpose, technical solutions and advantages of the present utility model more clearly understood, the present utility model will be further described in detail below in conjunction with specific embodiments and with reference to the accompanying drawings.

Certain embodiments of the present invention will be described more fully hereinafter with reference to the accompanying drawings, some but not all embodiments of which are shown. Indeed, various embodiments of the invention may be embodied in many different forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that the invention will satisfy applicable legal requirements.

In an exemplary embodiment of the present invention, a performance testing device for fresh air purifiers that provides a micro-positive pressure testing environment is provided.

FIG. 1 is a schematic structural diagram of a fresh air purifier performance testing device for providing a micro-positive pressure testing environment according to an embodiment of the present disclosure. As shown in FIG. 1 , the performance testing device for the fresh air purifier provided in the micro positive pressure test environment in the present disclosure includes a test simulation cabin 1 , an upstream pollutant generating device 2 , an auxiliary fan device 3 , an exhaust system device 4 and the installation of a prototype of the fresh air purifier. 5 of the test bench 6. Through the auxiliary fan device 3, the requirement that the internal and external pressure difference be stabilized in a slightly positive pressure state in the test of the purification performance of the fresh air purifier is completed.

Among them, the fresh air purifier prototype adopts the two-way flow fresh air purifier model as the test example object, and this test device can be used for performance testing including but not limited to this type of fresh air purifier. The fresh air purifier prototype 5 is fixed on the test bench 6 in the test simulation cabin 1, the fresh air intake pipe 15 outside the cabin, the exhaust air pipe 27 outside the cabin (with the adjustment valve 29 for the exhaust pipe outside the cabin), and the air supply pipe in the cabin. 11 (with the cabin air supply pipe regulating valve 14), the cabin return air pipe 12 is connected to the prototype 5 of the fresh air purifier to be tested; among them, the outside fresh air intake pipe 15, the outside cabin exhaust pipe 27, the cabin air supply The diameter of the air pipe of the pipe 11 and the air return pipe 12 in the cabin is generally 150-200mm.

Specifically, the upstream pollutant generating device 2 is connected to the air inlet of the fresh air purifier through the fresh air intake pipe 15 outside the cabin, and communicates with the outside of the cabin through the pipe, and the pollutants generated upstream enter the downstream test through the fresh air intake pipe 15 outside the cabin. The test simulation cabin 1 of the device; the outside air enters the prototype 5 from the air inlet of the fresh air purifier for purification; the cabin air supply pipe 11 in the test simulation cabin 1 is connected to the fresh air supply in the cabin of the fresh air purifier prototype 5. , send the purified air to the simulation cabin; the cabin return air duct 12 in the test simulation cabin 1 is connected to the return air outlet of the fresh air purifier, and the used air in the cabin is returned to the prototype 5 to complete the air circulation in the cabin ; The exhaust system device 4 is connected to the exhaust port of the fresh air purifier prototype 5 through the outside exhaust pipe 27, and is connected to the outside of the cabin through the pipe, and the air in the test simulation cabin 1 can be discharged to the outside of the cabin through the exhaust system device 4 .

In order to enable the fresh air purifier to simulate the actual application situation, the fresh air purifier performance test device is also provided with a static pressure measurement point P2 of the air supply port in the cabin, a static pressure measurement point P1 of the fresh air outlet outside the cabin, and a static pressure pressure of the air outlet outside the cabin. Measuring point P5, pressure measuring point P4 in the exhaust duct of the test simulation cabin. Among them, P2 is set in the connecting pipe of the air supply port in the fresh air purification engine room. By monitoring the P2 pressure measurement point, the static pressure at the outlet of the fresh air purification machine air supply port can reach the nominal outlet static pressure value, simulating the actual installation air supply volume; P1 is set in the fresh air The fresh air inlet outside the cabin is connected to the pipeline, and the resistance of the fresh air intake duct outside the cabin can be monitored by monitoring the pressure measurement point P1 to ensure the fresh air intake; On the air outlet, the pressure of the air outlet of the fresh air purifier can be monitored by monitoring the pressure measuring point P5 to ensure the exhaust air volume; the pressure measuring point P4 in the exhaust duct of the experimental simulation cabin is set in the exhaust duct of the experimental simulation cabin to monitor the fresh air The internal resistance of the exhaust duct of the purifier prevents the pipeline resistance from being too large and the exhaust air volume being too small.

Since there are static pressure measuring points in the fresh air intake duct outside the fresh air purification engine room and in the exhaust duct of the test simulation cabin, the pressure in the pipeline is monitored and adjusted, which can reduce the interference caused by the increased resistance of the installed pipeline during the test process.

In this embodiment, in addition to the prototype 5, the air supply pipe 11 in the cabin, and the air return pipe 12 in the cabin, the test simulation cabin 1 is also provided with a stirring fan 7, a concentration measuring point C8 in the cabin, and inside and outside the test simulation cabin. Differential pressure measurement point P3 9, cabin pollutant injection port 10, cabin air supply port static pressure measurement point P2 13. Specifically, the cabin air supply pipe 11 is provided with a cabin air supply pipe regulating valve 14, which is used to adjust the size of the static pressure of the air supply port in the fresh air purification cabin by adjusting the size of the valve opening; the stirring fan 7 is fixedly connected On the top surface of the test simulation cabin 1, it is used to improve the fluidity of the air inside the test simulation cabin 1, so that the internal polluted gas during the test process is evenly filled into the space of the test simulation cabin 1; the pollutant injection port 10 in the cabin is fixed to the cabin. In the inner corner, it is used to test the occurrence of the initial concentration of pollutants in the simulation cabin 1; during the test, the concentration measurement point C and the pressure measurement point P3 in the test simulation cabin 1 are arranged in a predetermined position, and the concentration measurement point C is used for the test. In order to test the attenuation of pollutants in the cabin, the pressure measuring point is used to test the pressure difference P3 inside and outside the test simulation cabin 1, and then the auxiliary fan device 3 is used to adjust the size of P3.

In addition, the outside air exhaust pipe 27 and the outside fresh air intake pipe 15 are fixedly connected to the bulkhead of the test simulation cabin 1, and a sampling/sample feeding port is opened.

The auxiliary fan device 3 is connected to the test simulation cabin 1 through a connecting pipe 24 , and the auxiliary fan device 3 includes a connecting pipe 24 , an auxiliary fan 25 and an auxiliary fan regulating valve 26 . Among them, the connecting pipe 24 is used to connect the test simulation cabin 1 and the auxiliary fan 25. The general material is a hard pipe to reduce wind resistance; the auxiliary fan 25 is an exhaust fan, which is used to adjust the pressure difference P3 inside and outside the test simulation cabin 1. By adjusting the auxiliary fan 25 air volume, maintain the pressure difference inside and outside the test simulation cabin 1 as a constant value, reach the micro-positive pressure test condition, and test the pressure difference inside and outside the cabin with a single point method; the auxiliary fan regulating valve 26 is installed in the connecting pipe 24, through Adjust the size of the valve opening to meet the requirements of the air volume in the test simulation cabin 1, so as to adjust the size of the pressure difference between the inside and outside of the test simulation cabin 1.

Further, the auxiliary fan 25 has a frequency converter, which can adjust the exhaust air volume in time according to the change of the pressure difference outside the simulated cabin. It is always in a slightly positive pressure state; combined with the above-mentioned adjustment of the opening of the auxiliary fan control valve 26, the combination of the two methods can ensure that the test simulation cabin is in a slightly positive pressure state, so that the pressure difference inside and outside the test simulation cabin can reach the above-mentioned constant and slight pressure. positive pressure state.

The upstream pollutant generating device 2 includes a particulate filter 16, a gaseous pollutant purification device 17, a humidifier 18, a blower 19, a pollutant injection device 20, a flow meter 21, a static pressure measuring point P1 22 at the fresh air inlet, and a fresh air inlet. The upstream concentration measuring point 23 and the fresh air intake duct 15 outside the cabin.

Among them, the static pressure measuring point P122 of the fresh air inlet and the fresh air upstream concentration measuring point 23 are all arranged on the pipeline near the air inlet of the fresh air purifier; the particulate filter 16 and the gaseous pollutant purifying device 17 are arranged at the outside air inlet, It is used to ensure that the air entering the air outside the cabin is clean, to ensure the requirements of the test target pollutant concentration, and to improve the accuracy of the test; the humidifier 18 is used to ensure the humidity of the air entering the air outside the cabin. In this embodiment, the test requirements The relative humidity is (50±10)%; the blower 19 is fixedly connected in the fresh air intake duct outside the test simulation cabin 1 to ensure the fresh air intake outside the cabin to purify the fresh air and compensate for the increased wind resistance of the fresh air caused by the installation of the duct If the resistance of the air inlet pipe is too large, the blower 19 can be used to compensate, and the static pressure measurement point P1 is also guaranteed to be 0-2Pa; The pollutant generator can stably generate pollutants with a relatively constant concentration, thereby simulating the pollution of the outdoor atmospheric environment; the flow meter 21 is fixed in the fresh air inlet duct outside the test simulation cabin, and is used to read the fresh air If the fresh air intake volume of the purifier is unstable or lower than the rated value, the blower can be adjusted to ensure that the intake air volume is stable and reaches the rated state; at the same time, the stable fresh air intake volume outside the cabin can also ensure the stable occurrence of the upstream target pollutant concentration. , to ensure the true validity of the test. Further, the air intake volume can be used to calculate the purification performance of the fresh air purifier.

The air exhaust system device 4 includes an air exhaust pipe 27 outside the cabin, a static pressure measuring point P5 28 at the air outlet outside the cabin, a regulating valve 29 for the air exhaust pipe outside the cabin, an air exhaust duct 30 in the test simulation cabin, and the inside of the air exhaust pipe in the experimental simulation cabin. Pressure measuring point P4 31. Among them, the air exhaust pipe 27 outside the cabin is connected to the air outlet of the prototype 5, and the pollutants in the test simulation cabin 1 are discharged to the outside of the cabin; the pressure measurement points include two static pressure measurement points P5 and P4, and P5 is set in the outer exhaust of the cabin. The air duct 27 is the static pressure of the exhaust outlet of the fresh air purifier, which is generally set at -40Pa; P4 is 1 atmosphere pressure (single point test); P4 and P5 are both tested with a static pressure ring.

The outside exhaust pipe regulating valve 29 is installed at the corresponding position in the pipe of the outside exhaust pipe 27, and the size of the exhaust air volume of the fresh air purifier can be adjusted by adjusting the opening degree of the outside exhaust pipe regulating valve 29. The size of the static pressure at the outlet of the fresh air purifier makes the fresh air supply in the cabin reach the actual installation effect of the fresh air purifier, and simulates the actual application situation. Especially during the test, the test simulation cabin should be in a state of slight positive pressure.

Further, the exhaust duct 27 outside the fresh air purification cabin and the exhaust air of the auxiliary fan 25 are connected to the exhaust duct 30 of the test simulation cabin. To avoid environmental pollution, a filter device can be installed in the exhaust duct 30 to filter and exhaust air.

By using the fresh air purifier performance testing device that provides a micro-positive pressure test environment, the corresponding concentration tests of outdoor pollutants and indoor pollutants can be respectively given for the purification efficiency. When testing outdoor pollutants, the background of the test simulation cabin should be passed through, and the target pollutants should be stably generated at the fresh air inlet (upstream) outside the fresh air purification machine cabin. When the pollutant purification efficiency is tested, only the background concentration is introduced into the test simulation cabin, and the inlet of the fresh air fan does not need to be introduced into the pollutant. 2) times shall prevail, and the test time can be determined according to the replacement or dilution capacity of the fresh air purifier.

So far, the embodiments of the present invention have been described in detail with reference to the accompanying drawings. It should be noted that, in the accompanying drawings or the text of the description, the implementations that are not shown or described are in the form known to those of ordinary skill in the technical field, and are not described in detail. In addition, the above definitions of various elements and methods are not limited to various specific structures, shapes or manners mentioned in the embodiments, and those of ordinary skill in the art can simply modify or replace them.

It should also be noted that the directional terms mentioned in the embodiments, such as "up", "down", "front", "rear", "left", "right", etc., only refer to the directions of the drawings, not It is used to limit the protection scope of the present invention. Throughout the drawings, the same elements are denoted by the same or similar reference numbers. Conventional structures or constructions will be omitted when it may cause confusion in the understanding of the present invention.

Moreover, the shapes and sizes of the components in the figures do not reflect the actual size and proportion, but merely illustrate the contents of the embodiments of the present invention. Furthermore, in the claims, any reference signs placed between parentheses shall not be construed as limiting the claim.

Unless known to the contrary, the numerical parameters set forth in the specification and attached claims are approximations that can vary depending upon the desired properties sought to be obtained from the teachings of the present disclosure. Specifically, all numbers used in the specification and claims to indicate compositional contents, reaction conditions, etc., should be understood as being modified by the word "about" in all cases. In general, the meaning expressed is meant to include a change of ±10% in some embodiments, a change of ±5% in some embodiments, a change of ±1% in some embodiments, and a change of ±1% in some embodiments. Example ±0.5% variation.

Furthermore, the word "comprising" does not exclude the presence of elements or steps not listed in a claim. The word "a" or "an" preceding an element does not exclude the presence of a plurality of such elements.

The ordinal numbers such as "first", "second", "third", etc. used in the description and the claims are used to modify the corresponding elements, which themselves do not mean that the elements have any ordinal numbers, nor do they Representing the order of a certain element and another element, or the order in the manufacturing method, the use of these ordinal numbers is only used to clearly distinguish an element with a certain name from another element with the same name.

Those skilled in the art will understand that the modules in the device in the embodiment can be adaptively changed and arranged in one or more devices different from the embodiment. The modules or units or components in the embodiments may be combined into one module or unit or component, and further they may be divided into multiple sub-modules or sub-units or sub-assemblies. All features disclosed in this specification (including accompanying claims, abstract and drawings) and any method so disclosed may be employed in any combination, unless at least some of such features and/or procedures or elements are mutually exclusive. All processes or units of equipment are combined. Each feature disclosed in this specification (including accompanying claims, abstract and drawings) may be replaced by alternative features serving the same, equivalent or similar purpose, unless expressly stated otherwise. Also, in a unit claim enumerating several means, several of these means can be embodied by one and the same item of hardware.

Similarly, it will be appreciated that in the above description of exemplary embodiments of the invention, various features of the invention are sometimes grouped together into a single Examples, figures, or descriptions thereof. However, this method of disclosure should not be construed to reflect an intention that the claimed invention requires more features than are expressly recited in each claim. Rather, as the following claims reflect, disclosed aspects lie in less than all features of a single foregoing disclosed embodiment. Thus, the claims following the Detailed Description are hereby expressly incorporated into this Detailed Description, with each claim standing on its own as a separate embodiment of this invention.

The specific embodiments described above further describe the purpose, technical solutions and beneficial effects of the present invention in detail. It should be understood that the above are only specific embodiments of the present invention, and are not intended to limit the present invention. In the utility model, any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims (10)

1. a fresh air purifier performance testing device providing a micro-positive pressure test environment is characterized in that, comprising: A test simulation cabin (1), the test simulation cabin (1) is used to simulate the indoor environment during actual use to measure the actual fresh air effect obtained, and a fresh air purifier prototype (5) to be tested is arranged inside; An upstream pollutant generating device (2), one end of the upstream pollutant generating device (2) is connected to the fresh air inlet of the fresh air purifier prototype (5) through an outside fresh air inlet pipe (15), and the other end is connected to the fresh air inlet of the fresh air purifier prototype (5) The pipeline is communicated with the air outside the cabin, and is used to transport the pollutants generated upstream to the test simulation cabin (1); an auxiliary fan device (3), the auxiliary fan device (3) is connected to the test simulation cabin (1) through a connecting pipe (24), and is used for adjusting the internal and external pressure difference of the test simulation cabin (1); An air exhaust system device (4), one end of the air exhaust system device (4) is connected to the outboard air outlet of the fresh air purifier prototype (5) through an outside air exhaust pipe (27), and the other end is connected through a pipe Outside air, which is used to discharge the air in the test simulation cabin (1) to the outside of the cabin; Among them, during the test, the test simulation cabin (1) can maintain a slightly positive pressure state, and the positive pressure difference between the inside and outside of the test simulation cabin (1) is constant and adjustable between 5-20Pa, and the fluctuation does not exceed 2Pa. 2. The fresh air purifier performance testing device according to claim 1, is characterized in that, is also provided with in described test simulation cabin (1): The air return pipe (12) in the cabin is connected to the air inlet in the cabin of the prototype fresh air purifier (5) to be tested, and is used to send the air in the cabin into the prototype fresh air purifier (5); The air supply pipe (11) in the cabin is connected to the air supply port in the cabin of the fresh air purifier prototype (5), and is used for sending the air purified by the fresh air purifier prototype (5) to the test simulation cabin (1); The air supply pipe (11) in the cabin is provided with: The air supply pipe regulating valve (14) in the cabin is used to adjust the static pressure of the air supply port in the fresh air purification engine room by adjusting the opening degree of the valve; The static pressure measuring point (13) of the air supply port in the cabin is used to monitor the static pressure of the air supply port in the fresh air purification engine room. 3. The fresh air purifier performance testing device according to claim 1, is characterized in that, is also provided with in described test simulation cabin (1): a stirring fan (7), the stirring fan (7) is fixedly connected to the inner top surface of the test simulation cabin (1), for improving the fluidity of the air inside the test simulation cabin (1); A concentration measuring point (8) in the cabin, the concentration measuring point (8) in the cabin is used to monitor the concentration of pollutants in the test simulation cabin (1); The pressure measuring point (9) of the pressure difference inside and outside the test simulation cabin is used for the single-point method to test the pressure difference inside and outside the test simulation cabin (1); The pollutant injection port (10) in the cabin is used to realize the occurrence of the initial concentration of the pollutant background in the test simulation cabin (1). 4. The fresh air purifier performance testing device according to claim 1, wherein the auxiliary fan device (3) comprises: An auxiliary fan (25), which is an exhaust fan, is connected to the connecting pipe (24), and is used to adjust the pressure difference between the inside and outside of the test simulation cabin (1), so that the pressure difference between the inside and outside of the test simulation cabin (1) is adjusted. maintain a constant value; Auxiliary fan control valve (26), the auxiliary fan control valve (26) is installed in the connecting pipe (24), and is used to maintain the slightly positive pressure state of the test simulation cabin (1) by adjusting the size of the valve opening. 5 . The fresh air purifier performance testing device according to claim 1 , wherein the auxiliary fan ( 25 ) further comprises a frequency converter, which is used to adjust the air volume according to the change of the pressure difference outside the simulated cabin. 6 . 6. The fresh air purifier performance testing device according to claim 1, characterized in that the upstream pollutant generating device (2) comprises a particulate filter (16), a gaseous pollutant purifying device (17), a humidifier that are arranged in sequence (18), a blower (19), a pollutant release device (20), a flow meter (21), a static pressure measurement point of the fresh air inlet (22), a concentration measurement point upstream of the fresh air (23), and an outside fresh air intake duct ( 15); wherein, The particulate filter (16) and the gaseous pollutant purification device (17) are arranged at the air inlet outside the cabin, and are used to clean the air intake outside the cabin to ensure the requirements of the test target pollutant concentration; The humidifier (18) is used to change the humidity of the air intake outside the cabin; The blower (19) is fixedly connected in the fresh air intake duct (15) connected to the test simulation cabin (1), so as to compensate for the loss of fresh air intake air volume caused by the increased wind resistance caused by the installation of the duct; The pollutant injection device (20) is used to generate the upstream concentration of the fresh air air inlet of the fresh air purifier prototype (5) to simulate the pollution of the outdoor atmospheric environment; The flow meter (21) is fixed in the fresh air intake pipe (15) outside the test simulation cabin, and is used to read the fresh air intake volume of the fresh air purifier prototype (5); The static pressure measuring point (22) at the fresh air inlet and the fresh air upstream concentration measuring point (23) are both arranged on the fresh air inlet pipe (15) near the fresh air purifier's air inlet. 7. The fresh air purifier performance testing device according to claim 1, wherein the exhaust system device (4) comprises: The static pressure measurement point (28) of the air outlet outside the cabin is arranged on the air outlet pipe (27) outside the cabin at the air outlet outside the cabin of the fresh air purifier prototype (5), and is used for monitoring the exhaust air of the fresh air purifier (5). tuyere pressure; An external exhaust pipe regulating valve (29), the external exhaust pipe regulating valve (29) is installed in a predetermined position in the pipeline of the external exhaust pipe (27), and is used for adjusting the valve by adjusting the external exhaust pipe (29) The size of the opening degree, adjust the size of the exhaust air volume of the fresh air purifier. 8. The fresh air purifier performance testing device according to claim 7, wherein the exhaust system device (4) further comprises: an exhaust duct (30) of the experimental simulation cabin, connected to the outer exhaust duct (27) through the outer exhaust duct regulating valve (29); The pressure measuring point (31) in the exhaust duct of the experimental simulation cabin is arranged in the exhaust duct (30) of the experimental simulation cabin, and is used for monitoring the resistance in the exhaust duct of the fresh air purifier. 9. The fresh air purifier performance testing device according to claim 1 is characterized in that, the pressure measurement point (31) in the test simulation cabin exhaust duct and the static pressure measurement point (28) of the air outlet outside the cabin all adopt static pressure measurement points (28). Compression ring test. 10. The fresh air purifier performance testing device according to claim 1, characterized in that, the exhaust air of the outside air exhaust pipe (27) and the auxiliary fan (25) is connected to the test simulation cabin exhaust air pipe (30). ), the exhaust duct (30) of the test simulation cabin is provided with a filter device to filter and exhaust the air.

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