Warm air device suitable for special-shaped columns with air purification function

Abstract

The invention discloses a warm air device suitable for special-shaped columns and having an air purification function, including an L-shaped baffle located at a right-angled gap of a column, a supporting plate is provided on the column at the bottom of the L-shaped baffle, a dust collecting plate close to the side wall of the column is placed on the supporting plate, and an L-shaped chamber surrounded by the L-shaped baffle and the dust collecting plate close to the two side walls of the column constitutes a hot air flow channel: the dust collecting plate is composed of a plate frame, a cooling plate embedded in the inner side of the plate frame, and an activated carbon plate on the outer side, and the cooling plate close to the side wall of the column is a coil structure connected to an external refrigeration device through a connecting water pipe; a semi-elliptical heat source is provided in the L-shaped baffle below the dust collecting plate, and an air inlet is provided on the L-shaped baffle close to the semi-elliptical heat source; a fan-shaped wind slot with a height of 10 to 15 cm is extended outward in the horizontal direction at the top of the L-shaped baffle with a side length of the column as a radius, and an air outlet is provided on the outer side of the fan-shaped wind slot. The invention is simple in structure and practical, making the indoor airflow organization more reasonable.

Description

Technical Field

[0001] The invention relates to a warm air device used in a large space environment such as a large shopping mall, and in particular to a warm air device suitable for special-shaped columns and having an air purification function. Background Art

[0002] The heating device is an important device for providing heat indoors. When the heating device is used to heat the room in winter, due to the influence of the buoyancy of the heated air, the warm air provided by the heating device has a tendency to accumulate in the upper part of the room. The air outlet of the traditional heating device is generally set at the upper part of the room, so that a large amount of heat is accumulated in the upper space of the room, which cannot be well utilized, resulting in energy waste. In addition, the work and activity area of ​​personnel is often located in the return air or exhaust air environment, with poor sanitary conditions and low air supply efficiency. With the development of cities, tall indoor spaces (such as various large commercial activity centers, shopping malls, etc.) are increasing. For these tall indoor spaces, the above problems are particularly serious. The range of tall spaces that need to be heated is only the lower personnel activity area, while the upper area does not need to be heated. However, under the action of air thermal buoyancy, the air temperature in the upper part of the room is too high, and the resulting ineffective heating energy consumption is often very high. Moreover, the temperature distribution of hot upper and cold lower is contrary to the temperature distribution required for human thermal comfort, and a good heating effect cannot be achieved. Most tall and large-space buildings are equipped with support columns, which are located inside the building, evenly distributed and generally unobstructed. If a warm air device is combined with such support columns for low-level air supply, it can not only make the air supply more uniform and the sanitary conditions better, but also save energy and better meet the thermal comfort requirements of the human body. The cross-section of the current support columns is mostly circular or rectangular. It is slightly simple to design and install a warm air device on support columns with regular shapes such as cylinders or rectangles, but for support columns with special structures such as T-shaped or cross-shaped, the design of the warm air device is more complicated.

[0003] At the same time, when people use heating devices, in addition to certain requirements for energy saving and comfort, they also pay great attention to the quality of the air supplied. About 2.1 million people die each year worldwide due to the increase in particulate matter concentration. PM 2.5If the concentration increases by an average of 10 μg / m³ in one or two days, the total mortality rate will increase by 1.1% and 2.3% respectively. Particles deposited in the respiratory tract can cause emphysema, asthma, pneumoconiosis and other diseases, so inhalable particulate matter has been listed as a primary human carcinogen. Therefore, it is necessary for the heating device to have an air purification function. However, the existing suspended particle removal technology often has a low removal rate for small particles, and small particles are the most harmful type of particulate matter to the human body. The "Black Magic Dust" phenomenon on the vertical wall above the near-wall heat source provides a new idea for the removal of small particles. The so-called "Black Magic Dust" refers to the phenomenon that a large number of stains appear on the surface of indoor walls in a short period of time. The near-wall heat source itself radiates heat and is close to the wall, so that a high-speed, high-temperature area is formed above it, and particles are more likely to be deposited on the rear vertical wall. In recent years, although there are some methods of dust removal using this phenomenon, the technology is still immature and the dust collection area has not been subdivided and strengthened. Moreover, most of the devices involved have relatively simple functions and the dust removal principle is not clear enough, resulting in high costs and high energy consumption. Summary of the invention

[0004] The object of the present invention is to provide a heating device suitable for special-shaped columns and having an air purification function. The heating device is mainly designed for T-shaped, L-shaped or cross-shaped columns to make it more practical.

[0005] To achieve the above purpose, the present invention can adopt the following technical solutions:

[0006] The heating device suitable for special-shaped columns and having an air purification function described in the present invention comprises an L-shaped baffle plate located at a right-angle gap of the column and placed 15 to 35 cm away from the two side walls of the column, the height of the L-shaped baffle plate is 1 to 2 meters, and its two longitudinal sides extend toward the side walls of the column and are connected to the side walls of the column, a supporting plate is horizontally arranged on the side walls of the column at the bottom of the L-shaped baffle plate, a dust collecting plate close to the side walls of the column is placed on the supporting plate, and an L-shaped chamber surrounded by the L-shaped baffle plate and the dust collecting plates respectively close to the two side walls of the column constitutes a hot air flow channel: the dust collecting plate consists of a plate frame and a The invention is composed of a cooling plate and an activated carbon plate on the outside, and the cooling plate close to the side wall of the column is a coil structure connected to an external refrigeration device through a connecting water pipe; in the L-shaped baffle located below the dust collecting plate, semi-elliptical heat sources are horizontally arranged with the side lengths of the two side walls of the column as the major axis, and an air inlet is provided on the L-shaped baffle close to the semi-elliptical heat source, and a filter and an induced draft fan are sequentially provided on the air inlet; at the top of the L-shaped baffle, a fan-shaped wind groove with a height of 10-15 cm is extended outward in the horizontal direction with the side length of one side wall of the column as the radius, and an air outlet is provided on the outer side of the fan-shaped wind groove.

[0007] In order to improve the purification effect of the hot air flow, the dust collecting plate is composed of an upper dust collecting plate, a middle dust collecting reinforcement plate and a lower dust collecting plate stacked in sequence from top to bottom, and the cooling plate temperature of the upper dust collecting plate, the middle dust collecting reinforcement plate and the lower dust collecting plate and the surface roughness of the activated carbon plate are all different.

[0008] The height setting method of the upper dust collecting plate, the middle dust collecting reinforcement plate and the lower dust collecting plate is:

[0009] The first step is to establish a one-dimensional coordinate system. The origin of the coordinate system is a point on the outermost bottom edge of the dust collecting plate facing the L-shaped baffle. The axis is perpendicular to the bottom edge and points toward the ceiling. The height of the dust collecting plate is , divide the dust collecting plate into n (n ≥ 10 and is an integer) equal-height L-shaped strips along the positive direction of the x-axis. The height of each L-shaped strip is , the coordinates of the first L-shaped strip area , No. i L-shaped strip area range coordinates ( and is an integer), in this case, the dust collecting plate is regarded as a smooth vertical plate with uniform surface roughness;

[0010] The second step is to use FLUENT calculation software to simulate the flow field, temperature field and particle movement trajectory of the heating device;

[0011] The third step is to extract the number of particles N deposited on the surface of each L-shaped strip area in the simulated particle motion trajectory. i ( and is an integer);

[0012] Step 4: Take The corresponding area is the dust collection reinforcement area, which corresponds to the middle dust collection reinforcement plate. The area whose x coordinate is less than the lower limit of the dust collection reinforcement area is the lower dust collection area, which corresponds to the lower dust collection plate. The area whose x coordinate is greater than the upper limit of the dust collection reinforcement area is the high dust collection area, which corresponds to the upper dust collection plate.

[0013] The roughness of the activated carbon plate surface of the upper dust collecting plate is 30~50μm, the roughness of the activated carbon plate surface on the outer side of the middle dust collecting reinforcement plate is >100μm, and the roughness of the activated carbon plate surface on the outer side of the lower dust collecting plate is 50~100μm; the cooling plate temperature of the upper and lower dust collecting plates is 18~20℃, and the cooling plate temperature of the middle dust collecting reinforcement plate is 7~8℃.

[0014] To facilitate cleaning and installation, the activated carbon plate of the upper dust collecting plate, the activated carbon plate of the middle dust collecting reinforcement plate and the activated carbon plate of the lower dust collecting plate are all assembled from multiple pieces.

[0015] The L-shaped baffle is also formed by splicing multiple pieces.

[0016] In order to make the structure more compact while ensuring the heating effect, the width of the semi-elliptical heat source at the center is 10-30 cm.

[0017] The advantages of the present invention are simple structure and practicality. It can be reasonably combined with indoor T-shaped, L-shaped or cross-shaped supporting columns of special structures, "adapting to local conditions", greatly saving floor space. At the same time, since the distribution of the supporting columns is generally more uniform, the indoor air flow organization can be more reasonable. If it is a T-shaped supporting column, a set of the warm air device of the present invention can be installed at two right-angle gaps of the supporting column respectively. If it is a cross-shaped supporting column, a set of the warm air device of the present invention can be installed at four right-angle gaps. Of course, it can also be installed according to the actual position of the supporting column.

[0018] During actual installation, it can be installed at the bottom of the supporting column to achieve low-level air supply and directly deliver warm air into the area where people move. Since the air outlet is not attached to the ground, it will not blow up dust on the ground, making the sanitary conditions of the warm air delivered into the room better, thereby improving the air supply efficiency and air quality. This low-level air supply can also achieve a temperature distribution with warmth in the lower part of the room and cold in the upper part, which is consistent with the vertical temperature distribution required for human thermal comfort, allowing people to have a better heating experience. Delivering warm air from the area where people move can improve the utilization rate of warm air, avoid the accumulation of hot air in the upper area of ​​the space as soon as it is delivered into the room, save ineffective heating energy consumption, and have good energy-saving benefits.

[0019] The present invention utilizes the characteristics of forming a high-speed, high-temperature area on the upper part of the near-wall heat source to remove dust, which can achieve good particle removal effect, especially for small particles (such as PM 2.5 ) removal efficiency is high; the activated carbon plate embedded in the dust collecting plate frame can not only adsorb particulate matter, but also effectively remove gaseous pollutants such as formaldehyde in the air, achieving a good air purification effect; the present invention scientifically divides the dust collecting plate into different areas according to the probability of particle deposition, and sets activated carbon plates with different surface roughness in different areas in a targeted manner. The area with a large deposition probability adopts an activated carbon plate with a large surface roughness, which can strengthen the particle collection effect in a targeted manner, while saving money and materials, avoiding the problem of material waste and increased air flow resistance caused by setting a uniform roughness; at the same time, the temperature of the cooling plate of the middle dust collecting reinforcement plate (dust collecting reinforcement area) is set relatively low, which ensures the temperature difference between the air in the hot air channel and the dust collecting plate, and achieves a good particle deposition effect. The temperature of the upper and lower cooling plates is set relatively high, and the high-temperature chilled water provided by the natural cold source can be used, which is more energy-saving and environmentally friendly. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a structural schematic diagram of the present invention.

[0021] Figure 2 yes Figure 1 AA zoom view.

[0022] Figure 3 yes Figure 1 Top view of the .

[0023] Figure 4 yes Figure 1 Structural diagram of the middle dust collecting plate.

[0024] Figure 5 yes Figure 4 BB direction view. DETAILED DESCRIPTION

[0025] The present invention is described in detail below by taking a cross-shaped support column as an example, and the same is true for T-shaped and L-shaped columns. In actual design and manufacturing, it is also necessary to consider the position of the column. If the column is located in the middle area of ​​the room, the heating device can be installed at each right-angle gap of the column. If the column is located close to the wall, the heating device can be installed only at one or two right-angle gaps on the inside (personnel activity area).

[0026] like Figures 1 to 3 As shown, the warm air device suitable for special-shaped columns and having an air purification function described in the present invention comprises an L-shaped baffle plate 2 located at a right-angled gap of a column 1 and placed 15 to 35 cm away from the two side walls of the column. The height of the L-shaped baffle plate 2 is 1 to 2 meters, and its two longitudinal sides extend toward the side walls of the column and are connected to the side walls of the column. For easy installation, the L-shaped baffle plate 2 can be formed by splicing multiple pieces; a supporting plate 3 is horizontally arranged on the side wall of the column at the bottom of the L-shaped baffle plate 2, and a dust collecting plate 4 is placed on the supporting plate 3, which is close to the side wall of the column. The L-shaped chamber surrounded by the L-shaped baffle plate 2 and the dust collecting plates 4 respectively close to the two side walls of the column 1 constitutes a hot air flow channel: the present invention The dust collecting plate 4 is composed of a plate frame 4.1, a cooling plate 4.2 embedded in the inner side of the plate frame 4.1, and an activated carbon plate 4.3 on the outer side. The cooling plate 4.2 close to the side wall of the column is a coil structure connected to an external refrigeration device through a connecting water pipe; in the L-shaped baffle 2 located below the dust collecting plate 4, a semi-elliptical heat source 5 is horizontally arranged with the side length of the two side walls of the column as the major axis. In order to ensure the heating effect of the cold air and make the structure as compact as possible, in actual production, the width of the center of the semi-elliptical heat source 5 can be adjusted within the range of 10 to 30 cm; an air inlet is opened on the L-shaped baffle 2 close to the semi-elliptical heat source 5 (the air inlet can be adjusted according to the Figure 2The arrangement is shown in the figure, that is, air inlets are arranged at both ends of the L-shaped baffle 2, and the air inlet can also be arranged in the middle of the L-shaped baffle 2), and a filter 6 and an induced draft fan 7 are arranged on the air inlet in sequence; at the top of the L-shaped baffle 2, a fan-shaped wind groove 8 with a radius of 10-15 cm extending outward in the horizontal direction is formed with the side length of one side wall of the column as the radius, and an air outlet 9 is opened on the outer surface of the fan-shaped wind groove 8, and a wind direction angle adjustment plate of a shutter structure can be installed at the air outlet. If necessary, some air outlets can be closed to achieve directional air supply.

[0027] like Figures 4 and 5 As shown, in order to improve the dust accumulation effect of the dust collecting plate, the dust collecting plate 4 of the present invention is composed of an upper dust collecting plate, a middle dust collecting reinforcement plate and a lower dust collecting plate stacked in sequence from top to bottom, and the cooling plate temperatures of the upper dust collecting plate, the middle dust collecting reinforcement plate and the lower dust collecting plate and the surface roughness of the activated carbon plate are all different: the roughness of the surface of the activated carbon plate of the upper dust collecting plate is 30~50μm, the roughness of the surface of the activated carbon plate of the middle dust collecting reinforcement plate is >100μm, and the roughness of the surface of the activated carbon plate of the lower dust collecting plate is 50~100μm; correspondingly, the cooling plate temperatures of the upper and lower dust collecting plates are 18~20℃, and the cooling plate temperature of the middle dust collecting reinforcement plate is 7~8℃.

[0028] In actual production, since the temperature of the cooling plates inside the upper and lower dust collecting plates is relatively high, in order to save energy and reduce energy consumption, the cold water flowing out of the cooling coils of the middle dust collecting reinforcement plate can be directly introduced into the cooling coils inside the upper and lower dust collecting plates, and then returned to the refrigeration device to reduce the investment in refrigeration equipment; or only the cooling coils inside the middle dust collecting reinforcement plate can be introduced into the cooling water with a lower temperature produced by the refrigeration equipment, while the cooling coils inside the upper and lower dust collecting plates can be introduced into the cooling water with a higher temperature provided by a natural cold source (such as tap water), which is not only energy-saving and environmentally friendly, but also can improve the performance coefficient of the refrigeration equipment.

[0029] When the air heated by the heat source passes through the hot air flow channel, under the action of thermal phoresis, the rough surface of the activated carbon plate can not only adsorb particulate matter in the hot air, but also effectively remove gaseous pollutants such as formaldehyde in the hot air, thereby ensuring the cleanliness of the warm air blown out from the air outlet 9 and achieving a good air purification effect.

[0030] At the same time, the present invention designs the activated carbon plate of the upper dust collecting plate, the activated carbon plate of the middle dust collecting reinforcement plate and the activated carbon plate of the lower dust collecting plate to be assembled from multiple pieces. After being used for a period of time, a certain amount of pollutants will be adsorbed on the activated carbon plate. At this time, the L-shaped baffle 2 can be removed, and the activated carbon plate 4.3 can be removed from the plate frame 4.1 for cleaning and exposure, and then installed. This is very convenient and ensures the removal effect of particulate matter and gaseous pollutants such as formaldehyde.

[0031] In order to ensure the purification effect of particulate matter in the hot air flow, the method for setting the height of the upper dust collecting plate, the middle dust collecting reinforcement plate and the lower dust collecting plate in the present invention is as follows:

[0032] The first step is to establish a one-dimensional coordinate system. The origin of the coordinate system is a point on the outermost bottom edge of the dust collecting plate facing the L-shaped baffle. The axis is perpendicular to the bottom edge and points to the ceiling. The height of the dust collecting plate is , divide the dust collecting plate into n (n ≥ 10 and is an integer) equal-height L-shaped strip areas along the positive direction of the x-axis. The height of each L-shaped strip area is , the coordinates of the first L-shaped strip area , No. i L-shaped strip area range coordinates ( and is an integer), in which case the dust collecting plate is regarded as a smooth vertical plate with uniform surface roughness;

[0033] The second step is to use FLUENT calculation software to simulate the flow field, temperature field and particle movement trajectory of the heating device;

[0034] The third step is to extract the number of particles N deposited on the surface of each L-shaped strip area in the simulated particle motion trajectory. i ( and is an integer);

[0035] Step 4: Take The corresponding area is the dust collection reinforcement area, which corresponds to the middle dust collection reinforcement plate. The area whose x coordinate is less than the lower limit of the dust collection reinforcement area is the lower dust collection area, which corresponds to the lower dust collection plate. The area whose x coordinate is greater than the upper limit of the dust collection reinforcement area is the high dust collection area, which corresponds to the upper dust collection plate.

[0036] For example, a heating device with air purification function manufactured by the method of the present invention has a height of 1.5 meters. It is fixedly installed on the ground at a corner of a cross-shaped column with a cross-sectional size of 0.7m*0.7m. The height of the central axis of the air outlet is 1.47m, the wind speed of the air outlet is 3m / s, the power of the heat source is 2000W (excluding the solid width of the cross-shaped column, a semi-elliptical electric heating plate is laid according to a side length of 30cm, and the width at the center of the elliptical electric heating plate is 10cm), and the dust collecting plate height is 1.45m. The division of the dust collection enhancement area, the lower dust collection area and the upper dust collection area is carried out according to the above method, wherein the dust collecting plate is divided into 10 equal-area L-shaped strip areas of equal height along the x direction, and the height of each L-shaped strip area is 0.145m. The discrete phase model in the FLUENT calculation software is used to calculate the particle phase, and a total of 4000 monodisperse spherical particles with a particle size of 2.5μm are tracked. The calculation results of the number of particles deposited on the surface of each L-shaped annular area are as follows:

[0037]

[0038] Calculated , then the 1st, 2nd, and 3rd blocks meet , then the x-coordinate range of the dust collection enhancement zone is Since there is no region with an x-coordinate less than the lower limit of the dust collection enhancement zone, the lower dust collection zone is not set in this embodiment, and the x-coordinate range of the upper dust collection zone is .

[0039] The surface roughness of the activated carbon plate in the dust collection reinforcement zone is set to 110μm, and the surface roughness of the upper activated carbon plate is set to 50μm. Chilled water is introduced into the cooling plate to make the temperature of the cooling plate in the reinforcement zone reach 7°C, and the temperature of the upper cooling plate reaches 18°C. According to calculations, the removal rate of 2.5μm particles using this warm air device reaches 79.95%. Compared with the existing technology, its small particle removal ability has reached a higher level. The height of the central axis of the air outlet is 1.47m, which is located in the human body's breathing zone. The warm air is directly sent to the personnel activity area to avoid the warm air from being polluted after flowing in the indoor space. The air outlet is not attached to the ground and will not blow up the dust on the ground, so that the sanitary conditions of the warm air are better, the air supply efficiency and air quality are improved, and the ineffective heating energy consumption is saved at the same time.

Claims

1. A heating device suitable for special-shaped columns and having an air purification function, characterized in that: The heating device comprises an L-shaped baffle (2) located at a right-angle gap of the column (1) and 15 to 35 cm away from the two side walls of the column. The height of the L-shaped baffle (2) is 1 to 2 meters, and its two longitudinal sides extend toward the side walls of the column and are connected to the side walls of the column. A support plate (3) is horizontally arranged on the side wall of the column at the bottom of the L-shaped baffle (2), and a dust collecting plate (4) is placed on the support plate (3) and is close to the side wall of the column. The L-shaped chamber surrounded by the L-shaped baffle (2) and the dust collecting plates (4) respectively close to the two side walls of the column (1) constitutes a hot air flow channel: the dust collecting plate (4) is composed of a plate frame (4.1) and a cooling plate (4.2) embedded in the inner side of the plate frame (4.1) and an active plate on the outer side. The cooling plate (4.2) is a coil structure connected to an external refrigeration device via a water pipe; in the L-shaped baffle (2) located below the dust collecting plate (4), a semi-elliptical heat source (5) is horizontally arranged with the side length of the two side walls of the column as the major axis, and an air inlet is provided on the L-shaped baffle (2) close to the semi-elliptical heat source (5), and a filter (6) and an induced draft fan (7) are arranged on the air inlet in sequence; at the top of the L-shaped baffle (2), a fan-shaped air slot (8) with a height of 10 to 15 cm is extended outward in the horizontal direction with the side length of one side wall of the column as the radius, and an air outlet (9) is provided on the outer side of the fan-shaped air slot (8); The dust collecting plate (4) is composed of an upper dust collecting plate, a middle dust collecting reinforcing plate and a lower dust collecting plate which are stacked in sequence from top to bottom, and the upper dust collecting plate, the middle dust collecting reinforcing plate and the lower dust collecting plate have different cooling plate temperatures and different surface roughnesses of the activated carbon plates; The height setting method of the upper dust collecting plate, the middle dust collecting reinforcement plate and the lower dust collecting plate is: The first step is to establish a one-dimensional coordinate system. The origin of the coordinate system is a point on the outermost bottom edge of the dust collecting plate facing the L-shaped baffle. The positive axis is perpendicular to the bottom edge and points to the ceiling. The height of the dust collecting plate is . The dust collecting plate is divided into n (n ≥ 10 and is an integer) L-shaped strips of equal height and area along the positive direction of the x-axis. The height of each L-shaped strip is , the coordinates of the first L-shaped strip area , No. i L-shaped strip area range coordinates ( and is an integer), in which case the dust collecting plate is regarded as a smooth vertical plate with uniform surface roughness; The second step is to use FLUENT calculation software to simulate the flow field, temperature field and particle movement trajectory of the heating device; The third step is to extract the number of particles N deposited on the surface of each L-shaped strip area in the simulated particle motion trajectory. i ( and is an integer); Step 4: Take The corresponding area is the dust collection enhancement area, which corresponds to the middle dust collection enhancement plate. The area with an x ​​coordinate less than the lower limit of the dust collection enhancement area is the lower dust collection area, which corresponds to the lower dust collection plate. The area with an x ​​coordinate greater than the upper limit of the dust collection enhancement area is the high dust collection area, which corresponds to the upper dust collection plate. The activated carbon plate of the upper dust collecting plate, the activated carbon plate of the middle dust collecting reinforcement plate and the activated carbon plate of the lower dust collecting plate are all assembled from multiple pieces; The L-shaped baffle (2) is formed by splicing together multiple pieces.

2. The heating device suitable for special-shaped columns and having air purification function according to claim 1, characterized in that: The roughness of the activated carbon plate surface of the upper dust collecting plate is 30~50μm, the roughness of the activated carbon plate surface on the outer side of the middle dust collecting reinforcement plate is >100μm, and the roughness of the activated carbon plate surface on the outer side of the lower dust collecting plate is 50~100μm; the cooling plate temperature of the upper and lower dust collecting plates is 18~20℃, and the cooling plate temperature of the middle dust collecting reinforcement plate is 7~8℃.

3. The heating device suitable for special-shaped columns and having air purification function according to claim 1, characterized in that: The width of the semi-elliptical heat source (5) at the center is 10 to 30 cm.

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