Air handling unit and control system thereof

Abstract

The invention provides an air handling unit and a control system thereof, and relates to the technical field of air conditioning equipment, the air handling unit comprises an air return pipe and an air supply pipe, the air return pipe sleeves the air supply pipe, an air return channel is formed between the air return pipe and the air supply pipe, indoor air is conveyed from the indoor to the outdoor through the air return channel, and outdoor fresh air is conveyed from the outdoor to the indoor through the air supply pipe; an air return fan and an air return valve are sequentially arranged in the air return channel from the input end to the output end of indoor air. An air supply valve, a filter, a cooling coil, a heating coil and an air feeder are sequentially arranged in the air supply pipe from the input end to the output end of outdoor fresh air, and a first telescopic pipe and a second telescopic pipe which can stretch out of the air return pipe are further arranged at the two ends of the air supply pipe correspondingly. Through the compact structural design and the efficient heat exchange mechanism, many problems existing in a traditional air handling unit are effectively solved.

Description

Technical Field

[0001] The present invention relates to the technical field of air conditioning equipment, in particular to an air handling unit and a control system thereof. Background Art

[0002] In the current rapid urbanization process, building environment control has become one of the key factors in improving the quality of life of residents. However, traditional air handling units face many challenges in coping with the space limitations and energy efficiency requirements of modern buildings. These units are generally large in size, not only occupying valuable indoor space, but also causing many inconveniences in installation and maintenance, especially in residential and small office spaces with limited space, where their application is severely restricted. In addition, the lack of heat recovery and reuse of traditional units leads to a large amount of energy being wasted in the process of indoor and outdoor air exchange, which is not in line with the current global energy conservation and emission reduction concept. Summary of the invention

[0003] The present invention aims to provide a compact, high-efficiency and energy-saving air handling unit and a control system thereof to solve the problems existing in traditional air handling units.

[0004] The above technical objectives of the present invention are achieved through the following technical solutions: an air handling unit, comprising a return air duct and a supply air duct, the return air duct is sleeved outside the supply air duct, a return air channel is formed between the two, indoor air is transported from indoor to outdoor through the return air channel, and outdoor fresh air is transported from outdoor to indoor through the supply air duct; The return air duct is provided with a return air fan and a return air valve in sequence from the input end to the output end of the indoor air; The air supply duct is provided with an air supply valve, a filter, a cooling coil, a heating coil and a blower in sequence from the input end to the output end of the outdoor fresh air. The two ends of the air supply duct are also provided with a first telescopic tube and a second telescopic tube that can extend out of the return air duct.

[0005] In some embodiments, a return air grille and a supply air grille are respectively provided on the input ends of the return air duct and the supply air duct.

[0006] In some embodiments, the filter includes a longitudinal filter and a transverse filter, which are sequentially arranged after the air supply valve and before the cooling coil.

[0007] In some embodiments, the air supply duct is composed of a front section tube, a rear section tube and a plurality of heat exchange tubes. The heat exchange tubes connect the front section tube and the rear section tube to form a heat exchange area. The cooling coil, heating coil and air supply fan are all arranged in the rear section tube, and the remaining components are arranged in the front section tube.

[0008] In some embodiments, an air guiding mechanism is provided on the inner wall of the return air duct for guiding the indoor air in the return air channel to the heat exchange tube.

[0009] A control system for an air handling unit, comprising: Air quality monitoring module, used to monitor the concentration of pollutants and harmful gas content in indoor air in real time; Temperature and humidity monitoring module, used to monitor indoor and outdoor temperature and humidity in real time; Intelligent control unit receives and processes data from the monitoring module and automatically adjusts the unit's operating parameters; The actuator responds to the instructions of the intelligent control unit and performs corresponding mechanical actions.

[0010] In some embodiments, a user interaction panel is further included, which is connected to the intelligent control unit and is used to provide a user interface so that the user can set preferred parameters and view real-time status.

[0011] In some embodiments, an adaptive learning module is also included, which is connected to the intelligent control unit and is used to optimize the control strategy according to historical data and user habits.

[0012] Compared with the prior art, the present invention has the following beneficial effects: The present invention adopts a nested structure, and sets the return air duct outside the supply air duct, which greatly reduces the space required for the unit, making the unit more suitable for installation environments with limited space. This design not only reduces the requirements for installation space, but also improves space utilization, making the indoor layout more flexible and changeable.

[0013] The present invention realizes the transfer of heat (or cold) from the exhaust gas to the fresh air through comprehensive heat exchange between the return air channel and the air supply pipe, achieving the effect of pre-cooling or pre-heating. This design reduces the workload of the subsequent cooling coil and heating coil, improves energy efficiency, directly reduces operating costs, and conforms to the environmental protection trend of energy conservation and emission reduction.

[0014] The close arrangement of the indoor air output end and the fresh air input end of the present invention realizes the direct backflow of part of the indoor air, cleverly utilizes the residual temperature of the indoor air, helps balance the initial temperature of the fresh air, reduces the need for drastic temperature adjustment of the fresh air, and further achieves energy-saving effects. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the overall structure of the unit of the present invention; Figure 2 The figure is a schematic diagram of the air path distribution of the unit of the present invention in the working state; Figure 3 It is a detailed structural diagram of the return air duct of the unit of the present invention; Figure 4 It is a detailed structural diagram of the air supply duct of the unit of the present invention.

[0016] In the figure: 1. return air duct; 101. return air grille; 102. return air valve; 103. air guide mechanism; 104. return air fan; 2. supply air duct; 201. front section pipe; 202. heat exchange pipe; 203. rear section pipe; 2011. first telescopic pipe; 2012. supply air grille; 2013. supply air valve; 2014. longitudinal filter; 2015. transverse filter; 2031. cooling coil; 2032. heating coil; 2033. supply air fan; 2034. second telescopic pipe; 3. wall. DETAILED DESCRIPTION

[0017] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limiting the present invention.

[0018] In the description of the present invention, it should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0019] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0020] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0021] like Figure 1-4As shown, this embodiment provides an air handling unit, including a return air duct 1 and a supply air duct 2. The return air duct 1 is mounted on the outside of the supply air duct 2, and a return air channel is formed between the two. The indoor air is transported from the indoor to the outdoor through the return air channel, and the outdoor fresh air is transported from the outdoor to the indoor through the supply air duct 2. The return air duct 1 is mounted on the outside of the supply air duct 2 in this unit. This nested structure significantly reduces the space required for the unit. Compared with the traditional separate return air and supply air system, the present invention achieves miniaturization while maintaining efficient air handling capabilities, and is very suitable for installation environments with limited space, such as residential houses, small offices, etc. This feature not only reduces the requirements for installation space, but also improves space utilization, making the indoor layout more flexible and changeable.

[0022] In the return air channel, a return air fan 104 and a return air valve 102 are arranged in sequence from the input end to the output end of the indoor air. In the air supply pipe 2, an air supply valve 2013, a filter, a cooling coil 2031, a heating coil 2032 and a blower 2033 are arranged in sequence from the input end to the output end of the outdoor fresh air. The two ends of the air supply pipe 2 are also provided with a first telescopic pipe 2011 and a second telescopic pipe 2034 that can extend out of the return air pipe 1. In the process of indoor air being discharged to the outside through the return air channel, the entire air supply pipe 2 is wrapped inside, forming a natural heat exchange area. In this way, the heat (or coldness) of the exhaust gas can be effectively transferred to the newly entered fresh air, achieving the effect of pre-cooling or pre-heating, thereby reducing the workload of the subsequent cooling coil 2031 and the heating coil 2032. This design not only improves the energy utilization efficiency, but also directly reduces the operating cost, which is in line with the current environmental protection trend of energy conservation and emission reduction.

[0023] Moreover, the unit realizes direct reflux of part of the indoor air by setting the indoor air output end and the fresh air input end close to each other. This means that when the indoor air is discharged, part of the air will naturally mix into the fresh air supply duct 2, and then be sent into the room after mixing with the fresh air. This design cleverly utilizes the residual temperature of the indoor air to help balance the initial temperature of the fresh air, reduces the need for large-scale temperature adjustment of the fresh air, and again reduces the burden on the coil, achieving additional energy saving effects.

[0024] In addition, the unit adjusts the distance between the fresh air output and input ends and the indoor air input and output ends by adjusting the extension and retraction of the first telescopic tube 2011 and the second telescopic tube 2034, so as to adjust the degree of mutual influence between the indoor air and the fresh air during the input and output process. The closer the indoor air output end and the fresh air input end are, the more exhausted indoor air will be sent back into the room along with the fresh air. The extension length of the first telescopic tube 2011 can be adjusted according to the indoor carbon dioxide concentration. When the unit is working, the second telescopic tube 2034 at the fresh air output end can be adjusted to the longest to maximize the distance between the fresh air output end and the indoor air input end, so as to avoid the fresh air just input being drawn away along with the return air, resulting in a waste of fresh air. When the unit is to be installed or transported, the first telescopic tube 2011 and the second telescopic tube 2034 can be completely retracted to reduce the occupied space.

[0025] In summary, this unit not only significantly improves the air handling efficiency through its compact structural design, efficient heat exchange mechanism, innovative temperature balance strategy and flexible telescopic pipe adjustment function, but also greatly reduces energy consumption, enhances the adaptability and practicality of the system, and provides users with an air handling solution that is both efficient and energy-saving.

[0026] In some embodiments, Figure 3-4 As shown, a return air grille 101 and a supply air grille 2012 are respectively provided on the input ends of the return air duct 1 and the supply air duct 2; The return air grille 101 is located at the input end of the return air duct 1, and its main function is to filter and guide the indoor air into the return air channel. The design of the return air grille 101 can prevent large particles of dust, debris, etc. from entering the unit, thereby protecting the components inside the unit from damage and extending the service life of the unit. At the same time, the return air grille 101 can also effectively guide the airflow, ensuring that the indoor air can smoothly enter the return air channel, and improving the air handling efficiency of the unit.

[0027] The air supply grille 2012 is located at the input end of the air supply pipe 2, and its function is to filter and guide the outdoor fresh air into the air supply pipe 2. The air supply grille 2012 can also block large particles of impurities in the outdoor air to ensure the quality of the fresh air entering the room. In addition, the air supply grille 2012 can also adjust the speed and direction of the fresh air entering, so that the fresh air can be evenly distributed to every corner of the room, improving the indoor air quality and comfort.

[0028] The synergistic effect of the return air grille 101 and the air supply grille 2012 realizes the precise control of the indoor and outdoor air exchange process. By adjusting the opening of the grille, the indoor and outdoor air exchange volume can be flexibly adjusted to meet different usage requirements. For example, when the indoor air quality is poor, the opening of the return air grille 101 can be increased to increase the indoor air discharge volume; when the outdoor air quality is good, the opening of the air supply grille 2012 can be increased to increase the intake volume of fresh air. This flexible adjustment method not only improves the adaptability of the unit, but also further reduces energy consumption.

[0029] In summary, the arrangement of the return air grille 101 and the supply air grille 2012 not only protects the components inside the unit, improves the air handling efficiency of the unit and the indoor air quality, but also realizes the precise control of the indoor and outdoor air exchange process and reduces energy consumption. These technical effects together constitute an important part of the air handling unit of the present invention, providing users with an efficient, energy-saving and comfortable air handling solution.

[0030] In some embodiments, Figure 4 As shown, the filter includes a longitudinal filter 2014 and a transverse filter 2015, which are sequentially arranged after the air supply valve 2013 and before the cooling coil 2031; The longitudinal filter 2014 is located after the air supply valve 2013, and its main function is to initially filter larger particles and impurities in the outdoor fresh air. Since the outdoor air often contains impurities such as dust, pollen, and leaf fragments, if these impurities directly enter the unit, they will not only affect the normal operation of the unit, but also may damage sensitive components such as the cooling coil 2031 and the heating coil 2032. The setting of the longitudinal filter 2014 effectively blocks these large particles and impurities, protects the components inside the unit, and extends the service life of the unit.

[0031] Following the longitudinal filter 2014 is the transverse filter 2015, whose main function is to further refine and filter the tiny particles and harmful gases in the outdoor fresh air. As the problem of air pollution becomes increasingly serious, the outdoor air may contain tiny particles such as PM2.5 and PM10, as well as harmful gases such as sulfur dioxide and nitrogen oxides. If these tiny particles and harmful gases enter the room, they will have a serious impact on human health. The design of the transverse filter 2015 uses high-efficiency filter materials, which can effectively remove these tiny particles and harmful gases and ensure the quality of the fresh air entering the room.

[0032] The combination of the longitudinal filter 2014 and the transverse filter 2015 realizes double filtration of outdoor fresh air, greatly improving the filtration efficiency. This double filtration design not only ensures the quality of fresh air entering the room, but also reduces the frequency of cleaning and maintenance of the internal parts of the unit, reducing the cost of use.

[0033] In some embodiments, Figure 4 As shown, the air supply pipe 2 is composed of a front section pipe 201, a rear section pipe 203, and a plurality of heat exchange pipes 202 arranged between the front section pipe 201 and the rear section pipe 203 for connecting the two. The cooling coil 2031, the heating coil 2032, and the air supply fan 2033 are all arranged in the rear section pipe 203, and the other components are all arranged in the front section pipe 201; These heat exchange tubes 202 not only bear the task of connecting the front section tube 201 and the rear section tube 203, but more importantly, they form an effective heat exchange area. When the indoor air is discharged to the outside through the return air channel, the heat or cold of the exhaust gas can be transferred to the newly incoming fresh air through the heat exchange tubes 202, achieving the effect of pre-cooling or pre-heating. This design not only improves the energy efficiency, but also directly reduces the workload of the subsequent cooling coil 2031 and heating coil 2032, thereby reducing the operating cost.

[0034] Moreover, key components such as the cooling coil 2031, the heating coil 2032 and the blower 2033 are centrally arranged in the rear section pipe 203, while components such as the filter and the air supply valve 2013 are arranged in the front section pipe 201. This functional zoning design makes the air treatment process inside the unit more orderly. After being purified by the filter, the fresh air directly enters the rear section pipe 203 for heat exchange and air supply treatment, reducing unnecessary flow paths and eddy current phenomena, thereby improving air treatment efficiency. Moreover, components such as the blower 2033 that generate noise and vibration are centrally arranged in the rear section pipe 203, and isolated from the front section pipe 201 by the heat exchange pipe 202. This design effectively reduces the noise and vibration level during the operation of the unit. This not only improves the user's comfort, but also reduces the interference of the unit to the surrounding environment.

[0035] In some embodiments, Figure 3 As shown, an air guide mechanism 103 is provided on the inner wall of the return air duct 1. The air guide mechanism 103 is used to guide the indoor air in the return air channel to the heat exchange tube 202. The design of the air guide mechanism 103 enables the indoor air to be orderly guided to the heat exchange tube 202 when flowing in the return air channel. In this way, the heat or cold of the exhaust gas can be more fully transferred to the newly entered fresh air, thereby improving the heat exchange efficiency. This design not only helps to pre-cool or pre-heat the fresh air, but also reduces the workload of the subsequent cooling coil 2031 and the heating coil 2032, further reducing energy consumption.

[0036] This embodiment also proposes a control system for an air handling unit, which includes: Air quality monitoring module, used to monitor the concentration of pollutants and harmful gas content in indoor air in real time; Temperature and humidity monitoring module, used to monitor indoor and outdoor temperature and humidity in real time to ensure accurate temperature and humidity control; The intelligent control unit receives and processes the data from the monitoring module, and automatically adjusts the working parameters of the air handling unit according to the preset algorithm and user settings, including but not limited to the opening of the return air valve 102 and the supply air valve 2013, the telescopic length of the first telescopic tube 2011 and the second telescopic tube 2034, and the working status of the cooling coil 2031 and the heating coil 2032 and the speed of the supply air fan 2033; The actuator responds to the instructions of the intelligent control unit and performs corresponding mechanical actions to achieve efficient operation of the air handling unit; In this control system, the air quality monitoring module uses high-precision sensors to monitor the concentration of pollutants such as PM2.5, PM10, carbon dioxide, formaldehyde and harmful gas content in indoor air in real time, ensuring the accuracy and real-time nature of the data. The temperature and humidity monitoring module uses precise temperature and humidity sensors to monitor the temperature and humidity changes indoors and outdoors in real time, providing accurate temperature and humidity data support for the intelligent control unit.

[0037] As the core of the control system, the intelligent control unit receives and processes data from the monitoring module, and automatically adjusts the working parameters of the air handling unit according to the preset advanced algorithm and the preferences set by the user. For example, when the indoor air quality is poor, the intelligent control unit will increase the opening of the return air valve 102 to increase the discharge volume of indoor air, and adjust the opening of the air supply valve 2013 to introduce more fresh air; at the same time, according to the difference in indoor and outdoor temperature and humidity, the intelligent control unit will accurately control the working state of the cooling coil 2031 and the heating coil 2032, as well as the speed of the air supply fan 2033 to maintain the balance of indoor temperature and humidity. In addition, the intelligent control unit can also flexibly adjust the distance between the fresh air output and input ends and the indoor air input and output ends according to the telescopic length of the first telescopic tube 2011 and the second telescopic tube 2034 to optimize the exchange efficiency of indoor and outdoor air.

[0038] As the execution component of the control system, the actuator responds to the instructions of the intelligent control unit and performs corresponding mechanical actions. For example, according to the instructions of the intelligent control unit, the actuator will adjust the opening of the return air valve 102 and the air supply valve 2013 to control the exhaust of indoor air and the introduction of fresh air; at the same time, the actuator will also adjust the telescopic length of the first telescopic tube 2011 and the second telescopic tube 2034 to optimize the working performance of the air handling unit. In addition, the actuator can also control the working state of the cooling coil 2031, the heating coil 2032 and the speed of the air supply fan 2033 to ensure the efficient operation of the air handling unit.

[0039] In summary, the control system realizes intelligent management of air handling units by real-time monitoring of key parameters such as indoor air quality, temperature and humidity, and automatically adjusting the working parameters of air handling units according to preset algorithms and user settings. This intelligent control method not only improves air handling efficiency, but also greatly reduces energy consumption and enhances the adaptability and practicality of the system. At the same time, the control system can also be personalized according to the actual needs and preferences of users, providing users with an air handling solution that is both efficient and comfortable.

[0040] In some embodiments, the control system further includes a user interaction panel, which is connected to the intelligent control unit and is used to provide a user interface, allowing the user to set preference parameters and view real-time status; through the panel, the user can easily set various preference parameters, such as the desired indoor temperature, humidity, air quality level, etc. These preference parameters will be transmitted to the intelligent control unit in real time as an important basis for adjusting the working parameters of the air handling unit. At the same time, the user interaction panel can also display key data such as the quality, temperature and humidity of the current indoor air, as well as the working status of the air handling unit in real time, so that the user can understand the actual condition of the indoor environment at any time.

[0041] In some embodiments, the control system also includes an adaptive learning module, which is connected to the intelligent control unit and is used to continuously optimize the control strategy according to historical data and user habits, improve system performance and user satisfaction; the adaptive learning module can continuously collect and analyze historical data during the operation of the air handling unit, including but not limited to changes in indoor and outdoor temperature and humidity, air quality fluctuations, user-set preference parameters, and the working status of the unit, etc., and process the above data through AI model training. The adaptive learning module can identify the user's habits and demand patterns, such as the user's preferred indoor temperature and humidity range, sensitivity to air quality, and daily activity patterns. Based on these analysis results, the adaptive learning module will continuously adjust and optimize the control strategy of the intelligent control unit. For example, if the user often adjusts the indoor temperature within a certain time period, the adaptive learning module will learn this habit and automatically adjust the working parameters of the unit in the future time period to meet the user's comfort preferences in advance. Similarly, if the user has high requirements for air quality, the adaptive learning module will strengthen the control of fresh air introduction and air purification to ensure that the indoor air is always maintained at the user's expected level.

[0042] This specific embodiment is merely an explanation of the present invention and is not a limitation of the present invention. After reading this specification, those skilled in the art may make non-creative modifications to the present embodiment as needed. However, as long as they are within the scope of the claims of the present invention, they are protected by the patent law.

Claims

1. An air handling unit, comprising a return air duct (1) and an air supply duct (2), characterized in that: The return air duct (1) is sleeved on the outside of the supply air duct (2), and a return air channel is formed between the two. Indoor air is transported from indoors to outdoors through the return air channel, and outdoor fresh air is transported from outdoors to indoors through the supply air duct (2); A return air fan (104) and a return air valve (102) are arranged in sequence from the input end to the output end of the indoor air in the return air passage; An air supply valve (2013), a filter, a cooling coil (2031), a heating coil (2032) and an air supply fan (2033) are sequentially arranged in the air supply duct (2) from the input end to the output end of the outdoor fresh air. A first telescopic tube (2011) and a second telescopic tube (2034) capable of extending outside the return air duct (1) are also respectively arranged at both ends of the air supply duct (2).

2. An air handling unit according to claim 1, characterized in that: A return air grille (101) and a supply air grille (2012) are respectively arranged on the input ends of the return air duct (1) and the supply air duct (2).

3. An air handling unit according to claim 1, characterized in that: The filter comprises a longitudinal filter (2014) and a transverse filter (2015), which are arranged in sequence after the air supply valve (2013) and before the cooling coil (2031).

4. An air handling unit according to claim 1, characterized in that: The air supply pipe (2) is composed of a front section pipe (201), a rear section pipe (203) and a plurality of heat exchange pipes (202); the heat exchange pipe (202) connects the front section pipe (201) and the rear section pipe (203) to form a heat exchange area; the cooling coil (2031), the heating coil (2032) and the air supply fan (2033) are all arranged in the rear section pipe (203), and the remaining components are arranged in the front section pipe (201).

5. An air handling unit according to claim 4, characterized in that: An air guide mechanism (103) is provided on the inner wall of the return air duct (1) for guiding the indoor air in the return air channel to the heat exchange tube (202).

6. A control system for an air handling unit, the system being based on the air handling unit according to any one of claims 1 to 5, characterized in that: include: Air quality monitoring module, used to monitor the concentration of pollutants and harmful gas content in indoor air in real time; Temperature and humidity monitoring module, used to monitor indoor and outdoor temperature and humidity in real time; Intelligent control unit receives and processes data from the monitoring module and automatically adjusts the unit's operating parameters; The actuator responds to the instructions of the intelligent control unit and performs corresponding mechanical actions.

7. The control system of an air handling unit according to claim 6, characterized in that: A user interaction panel is also included, which is connected to the intelligent control unit and is used to provide a user interface so that the user can set preferred parameters and view real-time status.

8. The control system of an air handling unit according to claim 6, characterized in that: It also includes an adaptive learning module, which is connected to the intelligent control unit and is used to optimize the control strategy based on historical data and user habits.

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