CN107917499A - A kind of fresh air purified scavenger of no condensation air channel structure and its composition - Google Patents

Abstract

The invention discloses a kind of no condensation air channel structure and its fresh air purified scavenger of composition.This is the integrated formed structure made of polypropylene plastics expanded material without condensation air channel structure, has and the default wall thickness without condensation can be achieved.This includes outdoor fresh air air channel structure and indoor return air air channel structure without condensation air channel structure；Fresh air duct structure is used to transport outdoor fresh air, and indoor return air air channel structure is used to transport indoor return air.This is without condensation air channel structure with fresh air purified scavenger, and by each apparatus connecting of fresh air purified scavenger in the predeterminated position without condensation air channel structure, so that each equipment installation is more simply, conveniently, there is the problem of poorly sealed after also solving each equipment installation.Meanwhile fresh air purified scavenger can also be prevented without condensation air channel structure using this dew condensation phenomenon occurs, improve the performance of fresh air purified scavenger.

Description

A non-condensing air duct structure and a fresh air purifying ventilator composed of the same

technical field

The invention relates to a non-condensing air duct structure, and at the same time relates to a fresh air purification ventilator including the non-condensing air duct structure, belonging to the technical field of fresh air ventilation equipment.

Background technique

Condensation is a phenomenon in which a high-temperature, high-humidity gas liquefies into a liquid on its surface when it reaches the dew point temperature when it encounters a low-temperature object. During the use of the existing fresh air purifying ventilator, there will be condensation, especially at the intersection of the intake and exhaust air from the fresh air inlet to the front section of the heat exchanger and after passing through the heat exchanger to the return air outlet section, and it may be in contact with the environment. Condensation is prone to occur at locations where temperature differences occur.

There are two main hazards of condensation in the fresh air purification ventilator: 1. Condensed water may be blown out from the air outlet and blown into the room to increase the air humidity, causing discomfort to the human body, and dampening the clothes in the room and making the home moldy; 2. Water accumulates inside the air duct, which breeds mildew and bacteria. These bacteria and mold viruses spread all over the home space with the fresh air. If they are inhaled into the human body, they will endanger the health of family members.

In order to solve the condensation problem of the existing fresh air purifying ventilator, a condensate pan and a condensate pipe connected thereto are usually used to discharge the condensation generated inside the fresh air purifying ventilator to the outside. However, there are the following disadvantages: 1. The condensed water pan is small, so that the condensed water pan under the unit cannot completely contain the unit, and the condensed water from the surface cooler will drip out of the pan. In addition, the fan coil and the cold water pipe connection If there is no condensate pan under the manual and electric valves, condensation is more likely to appear at the valve handle and the valve connection. 2. The connection between the condensate pan and the surface cooler is not insulated. Because the surface temperature of the surface cooler is low, if the connection between the condensate pan and the surface cooler is not treated accordingly, a cold bridge will be formed, and condensation will easily occur. Exposure to dripping accidents. 3. The slope of the condensed water pipe is unreasonable, and the condensed water cannot be discharged in a timely and smooth manner, causing the condensed water to accumulate more and more in the condensed water pan, and finally overflow.

Contents of the invention

The primary technical problem to be solved by the present invention is to provide a condensation-free air duct structure.

Another technical problem to be solved by the present invention is to provide a fresh air purifying ventilator comprising the above-mentioned non-condensing air duct structure.

In order to achieve the above object, the present invention adopts the following technical solutions:

According to the first aspect of the embodiments of the present invention, a non-condensation air duct structure is provided, wherein,

The non-condensing air duct structure is an integrally formed structure made of polypropylene plastic foam material, and the non-condensing air duct structure has a preset wall thickness that can realize no condensation;

The non-condensing air duct structure includes an outdoor fresh air duct structure and an indoor return air duct structure; the fresh air duct structure is used to transport outdoor fresh air, and the indoor return air duct structure is used to transport indoor return air.

Preferably, the preset wall thickness is calculated according to the preset cross-sectional area of the non-condensing air duct structure and the value of the air volume flowing through the non-condensing air duct structure.

Preferably, the cross-sectional area of the non-condensing air duct structure includes the cross-sectional area of the outdoor fresh air duct structure and the cross-sectional area of the indoor return air duct structure; The air volume includes the air volume flowing through the outdoor fresh air duct structure and the air volume flowing through the indoor return air duct structure.

Preferably, according to the cross-sectional area of the outdoor fresh air duct structure and the air volume flowing through the outdoor fresh air duct structure, and the cross-sectional area of the indoor return air duct structure and the indoor return air flow Calculate the wind speed flowing through the outdoor fresh air duct structure and the wind speed flowing through the indoor return air duct structure respectively; the wind speed flowing through the outdoor fresh air duct structure and the indoor return air duct structure The wind speed of the wind duct structure is expressed as:

Wherein, when v represents the wind speed flowing through the outdoor fresh air duct structure, Q represents the air volume flowing through the outdoor fresh air duct structure, and S represents the cross-sectional area of the outdoor fresh air duct structure;

When v represents the wind speed flowing through the indoor return air duct structure, Q represents the air volume flowing through the indoor return air duct structure, and S represents the cross-sectional area of the indoor return air duct structure.

Preferably, the minimum wall thickness of the outdoor fresh air duct structure to achieve no condensation and the minimum wall thickness of the indoor return air duct structure to achieve no condensation are expressed as:

L＝0.6v ² -7v+33

Wherein, v represents the wind speed flowing through the outdoor fresh air duct structure corresponding to the minimum wall thickness of the outdoor fresh air duct structure that achieves no condensation; or v indicates that the indoor return air duct structure achieves no condensation The wind speed corresponding to the minimum wall thickness flowing through the indoor return air duct structure;

Among the values of the minimum wall thickness of the outdoor fresh air duct structure to achieve no condensation and the minimum wall thickness of the indoor return air duct structure to achieve no condensation, the largest value of the minimum wall thickness is selected as the value The preset wall thickness of the non-condensing air duct structure.

According to the second aspect of the embodiments of the present invention, there is provided a fresh air purifying ventilator, which includes a box made of polypropylene plastic foam material, and the non-condensation air duct structure is arranged inside the box, so that The non-condensing air duct structure is equipped with a primary filter, a return air primary filter, a heat exchanger, a high-efficiency filter, an exhaust fan, a return fan, and a main control device. The exhaust fan and the The return air fans are respectively connected with the main control device.

Preferably, the non-condensing air duct structure is provided with a first volute structure and a second volute structure made of polypropylene plastic foam material for respectively installing the exhaust fan and the return fan. Volute structure.

Preferably, the non-condensing air duct structure is also provided with a PM2.5 filter, a PM2.5 sensor, and a temperature sensor, and the PM2.5 sensor and the temperature sensor are respectively connected to the main control device ;

The box body is provided with a fresh air inlet, a return air outlet, a return air inlet, and a fresh air outlet; the fresh air inlet and the fresh air outlet are correspondingly connected to the outdoor fresh air duct structure, so that the outdoor fresh air enters from the fresh air inlet The outdoor fresh air duct structure is discharged from the fresh air outlet to the room after passing through the primary filter, the PM2.5 filter, the heat exchanger, and the high-efficiency filter in turn;

The return air outlet and the return air inlet are correspondingly connected with the indoor return air duct structure, so that the indoor return air enters the indoor return air duct structure from the return air inlet, and passes through the return air duct in turn. After the air primary effect filter and heat exchanger, it is discharged to the outside from the return air outlet.

Wherein preferably, the primary effect filter, the PM2.5 filter, the return air primary filter, the high efficiency filter and the main control device are respectively installed on the The preset position of the non-condensing air duct structure;

The heat exchanger is installed at a predetermined position of the non-condensing air channel structure through a plurality of chute;

A plurality of the slideways and the chute are respectively connected with the structure of the non-condensing air channel, and the wall thickness and material of the plurality of the slideways and the chute are the same as those of the non-condensing air duct structure. The structure is the same.

Preferably, the heat exchanger is a cross-flow plate-fin total heat exchanger, and the cross-flow plate-fin total heat exchanger includes an air supply channel and an exhaust air channel, and the air supply channel and the indoor The return air duct is structurally connected, and the exhaust duct is structurally communicated with the outdoor fresh air duct.

The non-condensing air duct structure provided by the present invention and the fresh air purifying ventilator composed thereof, on the one hand, the non-condensing air duct structure with preset wall thickness is made of polypropylene plastic foam material, and the non-condensing The wall thickness of the air duct structure realizes no condensation. On the other hand, the non-condensing air duct structure is used on the fresh air purifying ventilator, and each equipment of the fresh air purifying ventilator is plugged into the preset position of the non-condensing air duct structure, so that the installation of each equipment is easier. It is simple and convenient, and also solves the problem of poor sealing after the installation of various equipment. At the same time, the adoption of the non-condensing air duct structure can also prevent condensation from occurring in the fresh air purifying ventilator, thereby improving the performance of the fresh air purifying ventilator.

Description of drawings

Fig. 1 is the schematic diagram of the non-condensing air duct structure provided by the present invention;

Fig. 2 is a schematic diagram of installing the non-condensing air duct structure provided by the present invention in the enthalpy difference laboratory;

Fig. 3 is the curve of the minimum wall thickness of plate B when there is no condensation phenomenon under each air volume and the corresponding wind speed of the fresh air flowing through the outdoor fresh air duct structure in the non-condensing air duct structure provided by the present invention picture;

Fig. 4 is the structural representation of fresh air purifying ventilator provided by the present invention;

Fig. 5 is a schematic diagram of the non-condensing air duct structure in the fresh air purifying ventilator provided by the present invention.

Detailed ways

The technical content of the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

The non-condensing air duct structure provided by the present invention improves the existing air duct structure of the fresh air purifying ventilator according to the characteristics of the EPP (Expanded polypropylene-EPP, polypropylene plastic foaming material) material, effectively preventing the air duct from Condensation occurs in the structure. Apply the non-condensing air duct structure to the fresh air purifying ventilator to avoid condensation in the fresh air purifying ventilator.

Among them, the EPP material is a high-performance high-crystalline polymer/gas composite material with closed-cell independent cell structure and low thermal conductivity. It is best used as a heat insulation material and buoyancy material. At the same time, the EPP material has very good toughness and appropriate hardness, and has excellent cushioning performance in a large load range. Therefore, the non-condensing air duct structure made of EPP material not only has good thermal insulation performance, which can prevent the occurrence of condensation, but also has the advantages of light weight, low cost, good heat preservation effect, strong and reliable features.

The fresh air purifying ventilator with this non-condensing air duct structure does not need additional accessories such as condensate pans and condensate pipes connected to it, and does not need to perform insulation treatment on the fresh air purifying ventilator, making the fresh air purifying ventilator The structure of the air machine is simpler and the cost is lower. At the same time, the adoption of the non-condensation air duct structure also solves the problem of unsatisfactory anti-condensation effect of the existing fresh air purifying ventilator.

The non-condensing air duct structure provided by the present invention is an integrally formed structure made of EPP material, and the non-condensing air duct structure includes an outdoor fresh air duct structure and an indoor return air duct structure. Among them, the fresh air duct structure is used to transport outdoor fresh air, and the indoor return air duct structure is used to transport indoor return air. The outdoor fresh air duct structure and the indoor return air duct structure have preset wall thicknesses, and the wall thicknesses of the outdoor fresh air duct structure and the indoor return air duct structure are used to achieve no condensation. According to the preset cross-sectional area of the non-condensing air duct structure and the value of the air volume flowing through the non-condensing air duct structure, the minimum wall thickness for the outdoor fresh air duct structure and the indoor return air duct structure to achieve no condensation can be obtained . It can be seen that the wall thickness of the non-condensing air duct structure is the key to avoiding the condensation phenomenon.

Hereinafter, with reference to FIGS. 1 to 3 and Tables 1 and 2, how to obtain the minimum wall thickness of the non-condensing air duct structure to achieve no condensation will be described in detail.

In one embodiment of the invention, as shown in Figure 1, EPP materials are used to make non-condensing air duct structures with wall thicknesses of 5mm, 10mm, 15mm, 20mm, 25mm and 30mm respectively, and the non-condensing air duct structures are tested. The tightness of the structure (whether there is air leakage on the outer wall of the non-condensing air duct structure); the non-condensing air duct structure includes outdoor fresh air duct structure 1 and indoor return air duct structure 2, and outdoor fresh air duct structures with different wall thicknesses 1 has the same cross-sectional area, and indoor return air duct structures 2 with different wall thicknesses also have the same cross-sectional area.

Since the non-condensing air channel structure is mainly used to realize the non-condensing effect under the heating working condition (I), the heating working condition (II) and the cooling working condition. In addition, the cooling working condition is similar to the heating working condition (I), and the heating working condition (II) is condensation in shutdown state, so the occurrence of condensation is far less serious than that of the heating working condition (I). Taking the thermal working condition (I) as an example, experiments were carried out on non-condensing air duct structures with different wall thicknesses, and the minimum wall thickness for non-condensing air duct structures without condensation was obtained through analysis.

As shown in Figure 2, non-condensing air duct structures with wall thicknesses of 5mm, 10mm, 15mm, 20mm, 25mm and 30mm were installed in the enthalpy difference laboratory, and according to the national standard GB/T21087-2007 "Air-air energy The recovery device was tested. Under the heating condition (I), the condensed water dripping of plate A (wall plate), plate B (wall plate) and plate C (wall plate) were recorded respectively, as shown in Table 1. Among them, "/" means that under the air volume, the wall thickness of a certain wall plate cannot meet the requirements of the test, so the test of the wall plate under this air volume is abandoned. Since the test uses a visual inspection method to judge whether there is condensed water dripping inside the tested wall panel chamber, as shown in Table 1, the condensed water dripping of A board (wall board), B board (wall board) and C board (wall board) The conditions include the following situations: Ⅰ means no mist and no dripping, Ⅱ means condensed water but no dripping, Ⅲ means condensed water and dripping.

Table 1 Under the heating condition (I), the condensed water dripping situation of A board, B board and C board

It can be seen from Table 1 that the A plates with wall thicknesses of 5mm, 10mm, 15mm, 20mm, 25mm and 30mm have air volumes of 150m ³ /h, 300m ³ /h, 500m ³ /h, 700m ³ /h and 1000m ³ /h respectively. Under all conditions, there was no temperature change and no condensation.

Under the same wall thickness, the condensation phenomenon of board B and C decreases with the increase of air volume; and the condensation phenomenon of board B and C decreases with the increase of wall thickness under the same air volume .

In actual production, the non-condensing air duct structure is made of EPP material, so that the wall thickness of all the wall panels of the non-condensing air duct structure must be consistent. Therefore, the A-plate, B-plate and C-plate can be selected The panel with the most obvious condensation phenomenon is analyzed, and the minimum wall thickness for the non-condensation air duct structure to achieve no condensation is obtained. In the case of condensed water dripping on boards A, B and C, the condensation phenomenon on board B is the most obvious, so the following table 1 will be used to analyze board B.

Since Table 1 is for the outdoor fresh air duct structure 1 and the indoor return air duct structure 2 of the non-condensing air duct structure, the cross-sectional area of the test is 200mmx300mm, and the A board (wall board) and B board (wall board) are obtained. plate) and C plate (wall plate), and the outdoor fresh air duct structure 1 and the indoor return air duct structure 2 share the B plate, therefore, the outdoor fresh air duct structure 1 or the indoor return air duct Taking structure 2 as an example, analyze board B. The following takes the outdoor fresh air duct structure 1 as an example to analyze the board B. Among them, the wind speed of the fresh air flowing through the outdoor fresh air duct structure can be expressed as:

Among them, Q represents the air volume flowing through the outdoor fresh air duct structure, and S represents the cross-sectional area of the outdoor fresh air duct structure.

In Table 1, select the minimum wall thickness of plate B when there is no condensation phenomenon under each air volume, and calculate the wind speed of fresh air flowing through the outdoor fresh air duct structure corresponding to each minimum wall thickness.

Specifically, it can be seen from Table 1 that when the air volume is 150m ³ /h, the minimum wall thickness when no condensation occurs is 30mm; when the air volume is 300m ³ /h, the minimum wall thickness when no condensation occurs The thickness is 25mm; when the air volume is 500m ³ /h, the minimum wall thickness when no condensation occurs is 20mm; when the air volume is 700m ³ /h, the minimum wall thickness when no condensation occurs is 20mm; In the case of an air volume of 1000m ³ /h, the minimum wall thickness when there is no condensation phenomenon is 15mm; the air volume flowing through the outdoor fresh air duct structure and the cross-sectional area of the outdoor fresh air duct structure corresponding to each minimum wall thickness Substitute into formula (1), since in the present invention, the air volume is m ³ /h, so it is necessary to convert the air volume into wind speed. The wind speed of the fresh air flowing through the outdoor fresh air duct structure corresponding to each minimum wall thickness can be obtained from the formula (1), as shown in Table 2.

wind speed m/s 4.63 3.24 2.31 1.39 0.69 Wall thickness mm 15 20 20 25 30

Table 2 wall thickness - wind speed comparison table

As shown in Figure 3, the graph of each minimum wall thickness and the corresponding wind speed of the fresh air flowing through the outdoor fresh air duct structure, the formula can be obtained:

L＝0.6v ² -7v+33 (2)

Among them, L represents the minimum wall thickness (unit: mm) for the non-condensing air duct structure to achieve non-condensing, and v represents the wind speed (unit: m/s) flowing through the non-condensing air duct structure.

In order to facilitate practical application, in fact, the calculated minimum wall thickness of the non-condensing air duct structure to achieve non-condensing is generally rounded.

To sum up, by bringing the preset cross-sectional area of the non-condensing air duct structure and the value of the air volume flowing through the non-condensing air duct structure into formula (1), the wind speed flowing through the non-condensing air duct structure can be obtained, The minimum wall thickness of the non-condensing air duct structure to achieve non-condensing can be obtained by bringing the obtained wind speed flowing through the non-condensing air duct structure into the formula (2).

For example, assuming that the cabinet-type fresh air purification ventilator is designed to flow through the non-condensing air duct structure with an air volume of 300m ³ /h, while the design size of the outdoor fresh air duct structure is about 200mmx330mm, the design of the indoor return air duct structure The size is about 60mmx330mm; into the formula (1) and formula (2) respectively, the minimum wall thickness of the outdoor fresh air duct structure to achieve no condensation is 25mm, and the minimum wall thickness of the indoor return air duct structure to achieve no condensation is 20mm, because in actual production, the wall thickness of all the wall panels of the non-condensing air duct structure must be consistent, so the minimum wall thickness of the outdoor fresh air duct structure and the indoor return air duct structure to achieve no condensation is selected The wall thickness with a larger value is the minimum wall thickness for the non-condensation air duct structure to achieve non-condensation.

Since the existing fresh air purification ventilators include wall-mounted, cabinet-type, ceiling-mounted, etc., in combination with Figures 4 to 5 below, and taking the cabinet-type fresh air purifier as an example, the air purifiers including the non-condensing air duct structure The structure and principle of the fresh air purification ventilator are described in detail.

As shown in FIG. 4 and FIG. 5 , the present invention also provides a fresh air purifying ventilator comprising the above-mentioned non-condensing structure. The fresh air purifying ventilator includes a box body 3 made of EPP material. In order to ensure the appearance of the fresh air purifying ventilator, sheet metal parts can be covered outside the box body 3, and the sheet metal parts can also be used to realize connection and fixation. role. The non-condensing air duct structure 4 provided by the present invention made of EPP material is arranged inside the box body 3, and the non-condensing air duct structure 4 is provided inside the non-condensing air duct structure 4. The first volute structure 141 and the second volute structure 151 of the blower fan 14 and the return air fan 15; the cold can be avoided by setting the first volute structure 141 and the second volute structure 151 on the non-condensing air duct structure 4. Condensation occurs due to heat exchange.

As shown in Figure 4, a primary filter 5, a PM2.5 filter 6, a return air primary filter 16, a heat exchanger 7, a high-efficiency filter device 8 and main control device 9, wherein the primary filter 5, PM2.5 filter 6, return air primary filter 16, heat exchanger 7, and high efficiency filter 8 are installed in the non-condensing air duct structure 4 In the outdoor fresh air duct structure 401, the main control device 9 is installed in the indoor return air duct structure 402 of the non-condensing air duct structure 4, and the heat exchanger 7 is connected to the outdoor fresh air duct structure 401 and the indoor return air duct respectively. Structure 402 is connected.

As shown in Figures 4 and 5, a fresh air inlet 10, a return air outlet 11, a return air inlet, and a fresh air outlet 12 are arranged on the box body 3, and the fresh air inlet 10 and the fresh air outlet 12 are correspondingly communicated with the outdoor fresh air duct structure 401, It is used to make the outdoor fresh air enter the outdoor fresh air duct structure 401 from the fresh air inlet 10, pass through the primary filter 5 and the PM2.5 filter 6 in the outdoor fresh air duct structure 401 in sequence, and then enter the heat exchanger 7 , after being filtered by the high-efficiency filter 8, it is discharged into the room from the fresh air outlet 12. The return air outlet 11 and the return air inlet are correspondingly connected with the indoor return air duct structure 402, and are used to make the indoor return air enter the indoor return air duct structure 402 from the return air inlet, and pass through the return air primary filter 16 in turn. , After the heat exchanger 7, it is discharged to the outside from the return air outlet 11.

As shown in Figure 5, in order to facilitate the installation of primary filter 5, PM2.5 filter 6, return air primary filter 16, and high efficiency filter 8, multiple strip-shaped For the slideway, a plurality of strip-shaped slideways are integrated with the non-condensing air duct structure 4 , and the wall thickness and material are the same as those of the non-condensing air duct structure 4 . The shapes and sizes of the plurality of bar-shaped slides correspond to the side walls in contact with the primary filter 5, the PM2.5 filter 6, the return air primary filter 16, and the high-efficiency filter 8, and, after repeated Experiments show that the size of the strip slideway is 1 mm larger than the size of the side wall of the filter in contact with the strip slideway, which is not only convenient for installing each filter, but also does not cause the problem of poor sealing. Specifically referring to Fig. 4 and Fig. 5, the first slideway 25 that is used to install the primary effect filter 5 is to adopt the EPP material to make the integrated molding structure, when installing the primary effect filter 5, only need to put the primary effect filter 5 After the side wall is aligned with the first slideway 25, the primary effect filter 5 is promoted to move along the first slideway 25, and the primary effect filter 5 is moved until the side walls of the primary effect filter 5 are all aligned with the first slideway 25. Sticking, thereby completing the assembly process of primary effect filter 5. When the primary effect filter 5 needs to be maintained, it is only necessary to pull the primary effect filter 5 along the first slideway 25 and get final product. Similarly, the second slideway 26 for installing the PM2.5 filter 6, the third slideway 28 for installing the high-efficiency filter 8 and the fifth slideway 24 for installing the return air primary effect filter 16 also adopt EPP material is made of one-piece structure. When installing PM2.5 filter 6, return air primary filter 16 and high efficiency filter 8, you only need to install PM2.5 filter 6, return air primary filter 16 and high efficiency filter After the sidewall of filter 8 is respectively aligned with second slideway 26, the fifth slideway 24 and the third slideway 28, promote PM2.5 filter 6, return air primary effect filter 16 and high efficiency filter 8, make The PM2.5 filter 6, the return air primary effect filter 16 and the high efficiency filter 8 are correspondingly moved along the second slideway 26, the fifth slideway 24 and the third slideway 28, and the PM2.5 filter 6, the return air The primary effect filter 16 and the high efficiency filter 8 move to the PM2.5 filter 6, the side walls of the return air primary effect filter 16 and the high efficiency filter 8 are all connected with the second slideway 26, the fifth slideway 24 and the third slideway. The slideway 28 is firmly attached, thereby completing the assembly process of the PM2.5 filter 6, the return air primary filter 16 and the high efficiency filter 8. When it is necessary to maintain the PM2.5 filter 6, the return air primary filter 16 and the high efficiency filter 8, it is only necessary to slide the PM2.5 filter 6, the return air primary filter 16 and the high efficiency filter 8 along the second slide Road 26, the fifth slideway 24 and the third slideway 28 can be pulled out. Multiple slides are used to complete the assembly of primary filter 5, PM2.5 filter 6, return air primary filter 16 and high efficiency filter 8. This process does not require any installation parts, which is more convenient for primary filter 5. Disassemble and assemble PM2.5 filter 6, return air primary filter 16 and high efficiency filter 8.

As shown in Figure 5, in order to facilitate the installation of the heat exchanger 7, a plurality of chute 27 can be set on the non-condensing air duct structure 4, and the plurality of chute 27 is connected with the non-condensing air duct structure 4, and the wall The thickness and material are the same as those of the non-condensing air duct structure 4 . The position, shape and size of the chute 27 are matched with the heat exchanger 7. Similarly, after repeated experiments, the size of the plurality of chute 27 is greater than the size of the corner of the heat exchanger 7 in contact with the chute 27 1 mm is the best, which not only facilitates the installation of the heat exchanger 7, but also prevents the problem of poor sealing. Align the heat exchanger 7 with multiple chutes 27, push the heat exchanger 7, and move the heat exchanger 7 until the corners of the heat exchanger 7 are all firmly attached to the multiple chutes 27, thereby completing the installation of the heat exchanger 7. Assembly process. When the heat exchanger 7 needs to be maintained, it is only necessary to pull the heat exchanger 7 out along the plurality of slide grooves 27 . Therefore, the assembling process of the heat exchanger 7 is completed by using a plurality of sliding grooves 27 without using any installation parts, and it is more convenient to disassemble and assemble the heat exchanger 7 .

The heat exchanger 7 is preferably a cross-flow plate-fin total heat exchanger made of heat-exchanging paper, and the cross-flow plate-fin total heat exchanger operates on the principle of cross-flow heat exchange of air with different temperatures and humidity , and two adjacent heat exchange plates form an air supply or exhaust channel, and the air supply channel and the exhaust channel are perpendicular to each other. Wherein, the air supply channel communicates with the indoor return air duct structure 402, and the exhaust air channel communicates with the outdoor fresh air duct structure 401, the indoor return air passes through one side of the heat exchange plate and the outdoor fresh air passes through the other side of the heat exchange plate, thus The temperature is transferred from the higher side to the lower side through the heat exchange plate, and the humidity is transferred from the larger side to the smaller side through the heat exchange plate, so as to achieve the temperature of the indoor return air and the outdoor fresh air and humidity. This process does not need to consume large power consumption, which reduces the cost of household electricity consumption. At the same time, the cross-flow plate-fin total heat exchanger also has antibacterial and antifungal properties, for example, it has a bactericidal effect on Escherichia coli, Staphylococcus aureus, Hepatitis bacillus, and Candida albicans.

As shown in Figures 4 and 5, in order to facilitate the installation of the main control device 9, a fourth slideway 29 can be provided on the non-condensation air duct structure 4, and the fourth slideway 29 is integrated with the non-condensation air duct structure 4 , and the wall thickness and material are the same as those of the non-condensing air duct structure 4. The shape and size of the fourth slideway 29 are matched with one side of the main control device 9. Similarly, through repeated experiments, the size of the fourth slideway 29 is greater than that of the main control device 9 in contact with the fourth slideway 29. The size of the side wall 1mm is the best, so that not only is it convenient to install the main control device 9, but also the problem of poor sealing will not occur. Align the main control device with the fourth slideway 29, push the main control device 9, so that all the side walls of the main control device 9 are firmly attached to the fourth slideway 29, thereby completing the assembly process of the main control device 9. When the main control device 9 needs to be removed, the main control device 9 only needs to be pulled out along the fourth slideway 29 . Therefore, using the fourth chute 29 to complete the assembly process of the main control device 9 does not require any installation parts, which makes it easier to disassemble the main control device 9 .

On the main control device 9, a PM2.5 sensor 13 and a temperature sensor (not shown) are installed at the position facing the return air inlet, and the exhaust fan 14, the return air fan 15, the PM2.5 sensor 13 and the temperature sensor are respectively Connect with the main control device 9. An inspection door is installed on the casing 3, and a display screen is installed on the inspection door, and the display screen is connected with the main control device 9.

The main control device 9 can adopt a PCB main board to supply power to the electrical equipment and the display screen in the box body 3 through the PCB main board, and cooperate with the display screen to complete the control process of each device in the box body 3 . The display screen can adopt a touch screen controller, which can be connected with a wireless network terminal, and can implement local or remote control. Display function, PM2.5 content display function, sleep function, temperature and humidity value display function, also has "purification", "strong cleaning" and "ultra-clean" functions; you can choose multiple time periods every day to set and adjust the air volume, and can automatically switch.

To sum up, in the process of assembling each equipment of this fresh air purification ventilator, each equipment only needs to be plugged into the preset position of the non-condensing air duct structure. When a certain equipment needs to be repaired or cleaned, directly The device can be removed from the preset position; therefore, the fresh air purifying ventilator adopting the non-condensation air duct structure provided by the present invention can not only prevent the occurrence of condensation, but also make the installation of each device easier, It is convenient, and at the same time, it also solves the problem of loose sealing after the installation of various equipment, and improves the performance of the fresh air purification ventilator.

The working process of the fresh air purifying ventilator provided by the present invention is: the outdoor fresh air enters the outdoor fresh air duct structure 401 through the fresh air inlet 10, and at the same time, the indoor return air enters the indoor return air duct structure 402 through the return air inlet, and enters the indoor return air duct structure 402. The outdoor fresh air in the outdoor fresh air duct structure 401 is filtered through the primary filter 5 and the PM2.5 filter 6 in sequence, and then enters the second channel of the heat exchanger 7; The return air enters the first channel of the heat exchanger 7, and the indoor return air and the outdoor fresh air perform total heat exchange, and the heated outdoor fresh air flows out from the heat exchanger 7, and after being filtered by the high-efficiency filter 8, it passes through the exhaust fan 14 And discharge to indoor from fresh air outlet 12. The indoor return air is then discharged through the heat exchanger 7, then passed through the return air blower 15 and discharged to the outside from the return air outlet 11. During this process, since the outdoor fresh air filtering process and the indoor return air discharge process both take place in the non-condensing air duct structure, and because the non-condensing air duct structure adopts the smallest non-condensing wall thickness, it is avoided to Condensation occurs at the junction of the inlet and exhaust air to the front section of the heat exchanger and the return air outlet section after passing through the heat exchanger. At the same time, all the installation parts of the fresh air purification ventilator are also arranged in the non-condensation air duct structure, which avoids the temperature difference caused by the contact between the installation parts and the outside, effectively prevents the "cold bridge" phenomenon, and fundamentally eliminates condensation occur.

The non-condensing air duct structure and the fresh air purifying ventilator provided by the present invention, on the one hand, use EPP materials to make the non-condensing air duct structure with a preset wall thickness, and utilize the non-condensing air duct structure The wall thickness achieves no condensation. On the other hand, the non-condensing air duct structure is used on the fresh air purifying ventilator, and each equipment of the fresh air purifying ventilator is plugged into the preset position of the non-condensing air duct structure, so that the installation of each equipment is easier. It is simple and convenient, and also solves the problem of poor sealing after the installation of various equipment. At the same time, the adoption of the non-condensing air duct structure can also prevent condensation from occurring in the fresh air purifying ventilator, thereby improving the performance of the fresh air purifying ventilator.

The non-condensing air duct structure provided by the present invention and the fresh air purifying ventilator composed of it have been described in detail above. For those skilled in the art, any obvious changes made to it without departing from the essential spirit of the present invention will fall within the protection scope of the patent right of the present invention.

Claims (10)

1. one kind is without condensation air channel structure, it is characterised in that：

The no condensation air channel structure is integrated formed structure, the no condensation air passage made of polypropylene plastics expanded material Structure, which has, can be achieved the default wall thickness without condensation；

The no condensation air channel structure includes outdoor fresh air air channel structure and indoor return air air channel structure；The fresh air duct structure For transporting outdoor fresh air, the indoor return air air channel structure is used to transport indoor return air.

2. as claimed in claim 1 without condensation air channel structure, it is characterised in that：

The default wall thickness is according to the sectional area of default no condensation air channel structure and flows through the air quantity number of no condensation air channel structure Value is calculated.

3. as claimed in claim 2 without condensation air channel structure, it is characterised in that：

The sectional area of the no condensation air channel structure includes the sectional area of the outdoor fresh air air channel structure and the indoor return air The sectional area of air channel structure；The air quantity for flowing through no condensation air channel structure includes the wind for flowing through the outdoor fresh air air channel structure Measure and flow through the air quantity of the indoor return air air channel structure.

4. as claimed in claim 3 without condensation air channel structure, it is characterised in that：

According to the sectional area of the outdoor fresh air air channel structure and the air quantity for flowing through the outdoor fresh air air channel structure, and the room The sectional area of interior return airway structure calculates and flows through the outdoor respectively with the air quantity for flowing through the indoor return air air channel structure The wind speed of fresh air duct structure and the wind speed for flowing through the indoor return air air channel structure；Flow through the outdoor fresh air air channel structure Wind speed is represented as with the wind speed for flowing through the indoor return air air channel structure：

<mrow> <mi>v</mi> <mo>=</mo> <mfrac> <mi>Q</mi> <mrow> <mi>S</mi> <mo>*</mo> <mn>3600</mn> </mrow> </mfrac> </mrow>

Wherein, when v represents to flow through the wind speed of the outdoor fresh air air channel structure, Q represents to flow through the outdoor fresh air air passage knot The air quantity of structure, S represent the sectional area of the outdoor fresh air air channel structure；

When v represents to flow through the wind speed of the indoor return air air channel structure, Q represents to flow through the wind of the indoor return air air channel structure Amount, S represent the sectional area of the indoor return air air channel structure.

5. as claimed in claim 4 without condensation air channel structure, it is characterised in that：

Minimum wall thickness (MINI W.) and the indoor return air air channel structure of the outdoor fresh air air channel structure realization without condensation are realized without condensation Minimum wall thickness (MINI W.) be represented as：

L=0.6v²-7v+33

Wherein, v represents that realizing that the minimum wall thickness (MINI W.) without condensation is corresponding with the outdoor fresh air air channel structure flows through the outdoor The wind speed of fresh air duct structure；Or v represents to realize that the minimum wall thickness (MINI W.) without condensation is corresponding with the indoor return air air channel structure The wind speed for flowing through the indoor return air air channel structure；

Realized in minimum wall thickness (MINI W.) of the outdoor fresh air air channel structure realization without condensation and the indoor return air air channel structure without solidifying In the numerical value of the minimum wall thickness (MINI W.) of dew, the numerical value of the minimum wall thickness (MINI W.) of maximum is chosen as described in the no condensation air channel structure Default wall thickness.

6. a kind of fresh air purified scavenger, it is characterised in that including the babinet made of polypropylene plastics expanded material, the case Body be internally provided with Claims 1 to 5 described in any one without condensation air channel structure, inside the no condensation air channel structure It is provided with primary filter, return air primary filter, heat exchanger, high efficiency particulate air filter, exhaust fan, return air fan, master control dress Put, the exhaust fan and the return air fan are connected with the master control set respectively.

7. fresh air purified scavenger as claimed in claim 6, it is characterised in that：

The no condensation air channel structure, which is internally provided with, to be made of polypropylene plastics expanded material and is respectively used to install the row The first volute structure and the second volute structure of wind wind turbine, the return air fan.

8. fresh air purified scavenger as claimed in claim 7, it is characterised in that：

PM2.5 filters, PM2.5 sensors, temperature sensor are additionally provided with inside the no condensation air channel structure, it is described PM2.5 sensors and the temperature sensor are connected with the master control set respectively；

Fresh air inlet, return air outlet, return air inlet, fresh air outlet are provided with the babinet；The fresh air inlet and described new Wind outlet correspondence is connected with the outdoor fresh air air channel structure so that outdoor fresh air enters described outdoor new from the fresh air inlet Wind air channel structure, and after the primary filter, the PM2.5 filters, successively through the heat exchanger, the efficient mistake After filter, interior is drained into from fresh air outlet；

Return air outlet and return air inlet correspondence are connected with the indoor return air air channel structure so that indoor return air is from institute Return air inlet is stated to enter in the indoor return air air channel structure, and successively through the return air primary filter, the heat exchanger Afterwards, outdoor is drained into from return air outlet.

9. fresh air purified scavenger as claimed in claim 8, it is characterised in that：

The primary filter, the PM2.5 filters, the return air primary filter, the high efficiency particulate air filter and the master Control device is installed on the predeterminated position of the no condensation air channel structure by multiple slideways respectively；

The heat exchanger is installed on the predeterminated position of the no condensation air channel structure by multiple sliding slots；

Multiple slideways and the sliding slot are connected with the no condensation air channel structure respectively, and multiple slideways and institute The wall thickness for stating sliding slot is identical with the equal and described no condensation air channel structure of material.

10. fresh air purified scavenger as claimed in claim 9, it is characterised in that：

The heat exchanger is distributary plate-fin total-heat exchanger, the distributary plate-fin total-heat exchanger include intake adit and Air exhaust passage, the intake adit are connected with the indoor return air air channel structure, the air exhaust passage and the outdoor fresh air wind Road fabric connectivity.