A hot air supply system and a control method thereof

Abstract

The application provides a heating air system and a control method thereof, wherein the system comprises: an air conditioner indoor unit which is assembled on an indoor wall, a return air inlet of the air conditioner indoor unit being communicated with an indoor space, an air outlet of the air conditioner indoor unit being assembled and connected with an air duct assembly, and an extension line of an outlet of the air duct assembly being perpendicular to the indoor ground; in a working state, air flow sent out by the air conditioner indoor unit is sent out through the air duct assembly, and wall type air supply air flow is formed along the indoor wall, and the wall type air supply air flow is diffused to form a hot air lake after touching the indoor ground. The application solves the problem that the existing technology is difficult to send hot air to a personnel space in an up air supply mode. The hot air can be directly sent to a lower part of a room at low loss and the rising of hot air flow is effectively inhibited, so that the hot air flow is well extended and diffused in a horizontal direction.

Description

Technical Field

[0001] This invention relates to the field of heating, ventilation, and air conditioning (HVAC), and more particularly to a heating air system and its control method, which is especially applicable to residential and office building spaces. Background Technology

[0002] When using heating units for heating in winter, it is essential to establish a good airflow organization. The form of "airflow organization" is a crucial factor affecting the indoor ventilation and air conditioning effects, determining the distribution of fresh air, heat, humidity, and indoor pollutant concentrations. A reasonable airflow organization should effectively improve indoor air quality, create a comfortable thermal and humid environment, and effectively eliminate the feeling of drafts while consuming less energy.

[0003] There are two types of airflow organization patterns: traditional mixed ventilation based on the principle of dilution (such as...). Figure 1 ); Modern displacement ventilation powered by buoyancy control (such as Figure 2 ).

[0004] Traditional mixed-ventilation air conditioning units based on the dilution principle commonly suffer from excessive vertical temperature gradients indoors during winter, resulting in overly warm head areas and cold feet. Secondly, the work area in mixed-ventilation systems is typically located in a return or exhaust air environment, leading to relatively poor hygiene. Finally, improper airflow organization results in poor ventilation efficiency, reduced energy utilization, and is detrimental to energy conservation.

[0005] When displacement ventilation is used for hot air supply, because the system supply air velocity is relatively low (0.1-0.3 m / s), and the supply air temperature is higher than the ambient air temperature, the airflow will rise evenly in the active area without spreading. Therefore, it can be concluded that displacement ventilation can only be effectively applied when the supply air temperature is lower than the indoor air temperature. Summary of the Invention

[0006] The purpose of this invention is to provide a heating air system and its control method, which solves the problem that the existing upward air supply method is difficult to deliver hot air to the personnel space; it can deliver hot air directly to the lower part of the room with low loss and effectively suppress the rise of hot air flow, ensuring good extension and diffusion effect of hot air flow in the horizontal direction.

[0007] To achieve the above objectives, the present invention provides a heating air system, comprising: an air conditioning indoor unit, wherein the air conditioning indoor unit is mounted on an indoor wall, the return air vent of the air conditioning indoor unit is connected to the indoor space, and the air outlet of the air conditioning indoor unit is connected to an air duct assembly, wherein the extension line of the outlet of the air duct assembly is perpendicular to the indoor floor.

[0008] In operation, the airflow delivered by the indoor unit of the air conditioner is sent out through the air duct assembly and forms a wall-mounted airflow along the indoor wall. After the wall-mounted airflow touches the indoor floor, it diffuses to form a hot air lake.

[0009] Compared to existing air conditioner indoor units, the direct blowing of hot air during winter can cause problems such as dryness of the nasal mucosa and oral mucosa; and the hot air blown out directly to the upper part of the room can cause temperature differences throughout the space, namely, a huge vertical temperature difference between the feet and the head and feet.

[0010] By adding an air duct assembly, the hot air generated by the indoor unit of the air conditioner is diverted and sprayed onto the indoor floor. At the same time, the hot air diffuses along the indoor floor and rises to the upper part of the indoor space, making the temperature difference of the entire space relatively small and the people in a more comfortable environment.

[0011] The hot air lake that spreads further across the indoor floor ensures user comfort, keeping them away from the air conditioner's indoor unit while still providing a pleasant indoor environment.

[0012] In summary, the presence of the air duct assembly reduces the air supply height, effectively suppressing the upward flow of hot air, while not occupying too much room space.

[0013] In a preferred embodiment of the invention, the air duct assembly is mounted on the upper area of ​​any wall in the room.

[0014] This solution specifies the exact installation location of the air duct assembly. Since the air duct assembly fills the entire indoor space with the hot air generated by the indoor unit of the air conditioner, it is placed in the upper area of ​​the center of the wall. This saves installation space and improves the efficiency of hot air diffusion. In the center area, the sides and bottom are heated more evenly.

[0015] In addition, placing it in the upper area of ​​the center position ensures that there are no obstructions around the air duct assembly, making it easy to assemble and allowing for better airflow guidance during use.

[0016] In a preferred embodiment of the present invention, the air duct assembly is a ventilation duct, which is a telescopic structure, and the outlet of the ventilation duct is adjusted to be 1.1-3m from the indoor ground.

[0017] The retractable structure allows for adjustment of the distance between the ventilation duct outlet and the indoor floor as needed. This is crucial for achieving optimal hot air diffusion efficiency under different spatial conditions and wind speed adjustments.

[0018] The hot air attachment distance in the air lake area is adjusted by adjusting the height of the air outlet from the ground. The relationship between the hot air attachment distance x in the air lake area and the height h of the air outlet is: x = 7.5 * h^(-0.8), h ∈ [1.1,3](R 2 =0.99, where R² is the coefficient of determination, a statistic that measures the goodness of fit. 2 The closer the value is to 1, the better the curve fit.

[0019] After the air jet adheres to the wall, the airflow continues to flow downwards along the wall and extends to the ground. As the reverse pressure gradient increases, the main body of the jet separates from the vertical wall and, after impacting the ground, extends forward along the floor in a radial flow manner, forming an "air lake area".

[0020] In a preferred embodiment of the present invention, the vertical distance S between the central axis of the ventilation duct and the interior wall, and the width d of the air outlet of the ventilation duct, satisfy the ratio of 0.5 ≤ S / d ≤ 2. This design allows the delivered airflow to form a wall-mounted airflow that adheres to the interior wall, further reducing its mixing with indoor polluted air or cold air, and improving the quality of the delivered air. The adhesion effect decreases as the value of s / d increases. When s / d < 2, an approximately fully adhered jet can be formed, and the minimum value of s / d is 0.5; therefore, it is recommended to satisfy 0.5 ≤ S / d ≤ 2.

[0021] In a preferred embodiment of the present invention, the ventilation duct includes a rectangular tube, one end of which is connected to the air outlet of the indoor unit of the air conditioner via an elbow.

[0022] The elbow design facilitates changing the airflow direction from the outlet of the original air conditioner indoor unit; it also serves as a mechanical connection component for assembling the air conditioner indoor unit and the ventilation duct.

[0023] A method for controlling heating air, comprising:

[0024] Get the current distance between the user and the air outlet of the indoor unit of the air conditioner, and set it to L;

[0025] Get the current user's activity time within the activity area and set it as t;

[0026] The distance L and time t mentioned above are sent to the controller, which dynamically adjusts the height h of the outlet of the air duct assembly from the indoor ground based on the obtained values.

[0027] In a preferred embodiment of the present invention, an adjustment model for distance L and height h is established, wherein the adjustment model h = (L / 7.5)^(-1.25).

[0028] This adjustment model is obtained based on numerical simulation. The air lake hot air attachment distance x at different air supply heights h is obtained through simulation, and the relational expression between x and h is fitted in the origin software as x = 7.5 * h^(-0.8). By inverse deduction, the relational expression between the current distance L of the user from the air outlet of the air conditioner indoor unit and the air supply height h that needs to be controlled is h = (L / 7.5)^(-1.25).

[0029] In a preferred embodiment of the present invention, when t > t1, the current distance L is fed back to the controller, denoted as x0, and the h value that triggered the previous adjustment action is denoted as x1. When x0 < x1, the air duct assembly rotates upward; when x0 > x1, the air duct assembly moves downward and rotates; when x0 = x1, the air duct assembly remains stationary; when t ≤ t1, the h value is not fed back to the controller.

[0030] Furthermore, the value of t1 is 3min < t1 < 5min. The value of t1 can be 3min, 3.5min, or it can also be selected as 4min, 5min, etc., and is specifically set according to actual needs. The purpose of setting this time is to adjust the height of the outlet of the air duct assembly from the indoor ground at any time within a certain time, so as to better achieve the optimal utilization of energy.

[0031] During the specific working process, the human body recognition sensor 6 senses the position L of the human body from the air outlet and the time t since the last action of the human body, and feeds x back to the controller (single-chip microcomputer) 7. The built-in program of the controller is h = (x / 7.5)^(-1.25), and the obtained h value is fed back to the driver 8. The driver 8 controls the rotation of the bearing 10 of the stepping motor 9. The rotation of the bearing 10带动 the height of the corrugated hose 11, adjusts the height of the air supply outlet from the ground to h, and then meets the requirement of the attachment distance of x.

[0032] Specifically, the height of the corrugated hose 11 from the ground in the natural vertical state is 1.2m.

[0033] When t > t1, the current x is fed back to the controller 7, denoted as x0. The x value that triggered the previous adjustment action is denoted as x1.

[0034] When x0 < x1, the bearing 10 rotates to the left. When x0 = x1, the air duct assembly remains stationary. When x0 > x1, the bearing 10 rotates to the right.

[0035] When t ≤ t1, the x value is not fed back to the controller 7.

[0036] The value of t1 is 3min < t1 < 5min.

[0037] Compared with the prior art, the beneficial effects of the present invention are:

[0038] Compared to traditional top-side air supply, this invention helps to suppress the rise of hot airflow, delivering the maximum amount of hot air from the air conditioner to the work area (where the user is located) in winter. The longer attachment length solves the problem of hot air not being able to reach the feet in winter and the huge vertical temperature difference between the head and feet. At the same time, it ensures the freshness, oxygen content and cleanliness of the air in the work area, which is beneficial to the health of personnel, and avoids problems such as dryness of the nasal mucosa and oral mucosa caused by direct hot air blowing.

[0039] In addition, this invention achieves the energy-saving requirements of the air conditioning system, and the hot air pool formed has a wide coverage area, ensuring the air freshness and comfort of all working areas while reducing air conditioning energy consumption. Attached Figure Description

[0040] Figure 1 This is the first airflow diffusion method in the prior art;

[0041] Figure 2 This is the second airflow diffusion method in the prior art;

[0042] Figure 3 A is a schematic diagram illustrating the first method of effectively suppressing the upward flow of hot air according to the present invention; Figure 3 B is a second schematic diagram illustrating the effective suppression of the upward flow of hot air according to the present invention. Figure 3 C is a third schematic diagram illustrating the effective suppression of the upward flow of hot air according to the present invention;

[0043] Figure 4 This is an assembly diagram of the system of the present invention;

[0044] Figure 5 This is a diagram showing the operating state of the system of the present invention;

[0045] Figure 6 This is a schematic diagram of the various parameters of the system of the present invention;

[0046] Figure 7 This is a detailed assembly structure diagram of the indoor air conditioner of the present invention;

[0047] Figure 8 The working state of the indoor air conditioner of the present invention Figure 1 ;

[0048] Figure 9 The working state of the indoor air conditioner of the present invention Figure 2 ;

[0049] Figure 10 This relates the attachment distance x and height h in this invention.

[0050] Figure 11 This illustrates the relationship between the attachment distance x and the height h in a specific embodiment of the present invention.

[0051] Figure 12 This is a temperature simulation cloud map under the environment of Embodiment 4 of the present invention;

[0052] Figure 13 This is a temperature simulation cloud map from Embodiment 4 of the present invention (without forming a wall-mounted airflow).

[0053] Figure 14 This is a temperature simulation cloud map under the environment of Embodiment 5 of the present invention;

[0054] Figure 15 This is a temperature simulation cloud map under the environment of Embodiment 6 of the present invention;

[0055] Figure 16 This is a temperature simulation cloud map under the environment of Embodiment 7 of the present invention;

[0056] Figure 17 This is a temperature simulation cloud map under the environment of Embodiment 8 of the present invention;

[0057] Figure 18 This is a temperature simulation cloud map under the environment of Embodiment 9 of the present invention;

[0058] Figure 19 This is a temperature simulation cloud map under the environment of Embodiment 10 of the present invention;

[0059] Figure 20 This is a temperature simulation cloud map under the environment of Embodiment 11 of the present invention;

[0060] Figure 21 This is a temperature simulation cloud map under the environment of Embodiment 12 of the present invention. Detailed Implementation

[0061] The present invention will now be described in detail with reference to the embodiments shown in the accompanying drawings. However, it should be noted that these embodiments are not intended to limit the present invention. Equivalent changes or substitutions in function, method, or structure made by those skilled in the art based on these embodiments are all within the scope of protection of the present invention.

[0062] A heating air supply system includes: an indoor air conditioning unit, which is mounted on an indoor wall, with its return air vent connected to an indoor space, and its air outlet connected to an exhaust duct assembly, the extension line of the exhaust duct assembly's outlet perpendicular to the indoor floor; in operation, the airflow delivered by the indoor air conditioning unit is sent out through the exhaust duct assembly and forms a wall-mounted airflow along the indoor wall, which diffuses upon contact with the indoor floor to form a hot air lake.

[0063] Compared to existing air conditioner indoor units, which suffer from problems like dryness of the nasal and oral mucosa caused by direct hot air blowing during winter, and the significant temperature difference between the feet and head-to-toe areas caused by the hot air rising directly to the upper part of the room, the newly added air duct assembly diverts and sprays the hot air generated by the air conditioner indoor unit onto the floor. Simultaneously, the hot air diffuses along the floor and rises to the upper part of the room, resulting in a smaller temperature difference and a more comfortable environment. Furthermore, the hot air lake formed by the diffusion of hot air across the floor further ensures user comfort, allowing them to enjoy a pleasant indoor environment while staying away from the air conditioner indoor unit.

[0064] The aforementioned hot air lake can deliver hot air directly to the lower part of the room with low loss and effectively suppress the rise of hot airflow. This is because the air jet has a high velocity and low static pressure near the side wall, while the static pressure is high further away from the side wall. Under the action of the pressure difference, the air jet bends towards the side wall and adheres to the wall (see below). Figure 3 A, Figure 3 B and Figure 3 C). Compared to mixed ventilation, the entrainment of indoor air by the supply airflow is less in this case than in mixed ventilation. Therefore, the velocity decay of the supply airflow is slower, and the resistance to the thermal buoyancy of the hot air is stronger. In this invention, further, an air supply duct is added to reduce the air supply height, further reducing the entrainment of the supply air jet, slowing down the velocity decay of the supply air jet, and suppressing the rise of the hot airflow.

[0065] Example 1:

[0066] Reference Figure 4 , Figure 5 As shown, in this embodiment, a heating air system includes: an indoor air conditioning unit 4, which is mounted on an indoor wall. The return air vent 5 of the indoor air conditioning unit is connected to the indoor space. The air outlet 1 of the indoor air conditioning unit is connected to an air duct assembly. The extension line of the outlet of the air duct assembly is perpendicular to the indoor floor. In operation, the airflow delivered by the indoor air conditioning unit is sent out through the air duct assembly and forms a wall-mounted airflow along the indoor wall. The wall-mounted airflow diffuses after touching the indoor floor to form a hot air lake.

[0067] Compared to existing air conditioner indoor units, the direct blowing of hot air during winter can cause problems such as dryness of the nasal mucosa and oral mucosa; and the hot air blown out directly to the upper part of the room can cause temperature differences throughout the space, namely, a huge vertical temperature difference between the feet and the head and feet.

[0068] By adding an air duct assembly, the hot air generated by the indoor unit of the air conditioner is diverted and sprayed onto the indoor floor. At the same time, the hot air diffuses along the indoor floor and rises to the upper part of the indoor space, making the temperature difference of the entire space relatively small and the people in a more comfortable environment. The hot air lake formed by the diffusion of the indoor floor further ensures the comfort of the users, who are away from the indoor unit of the air conditioner and enjoy a good indoor environment at the same time.

[0069] In summary, the presence of the air duct assembly reduces the air supply height, effectively suppressing the upward flow of hot air, while not occupying too much room space.

[0070] Furthermore, the air duct assembly is installed in the upper area of ​​any wall in the room. This solution provides the specific installation location of the air duct assembly. Since the air duct assembly fills the entire indoor space with the hot air generated by the indoor unit of the air conditioner, it is placed in the upper area of ​​the center of the wall. This saves installation space and can improve the efficiency of hot air diffusion. In the central area, the sides and bottom are heated more evenly.

[0071] In addition, placing it in the upper area of ​​the center position ensures that there are no obstructions around the air duct assembly, making it easy to assemble and allowing for better airflow guidance during use.

[0072] Furthermore, the aforementioned air duct assembly adopts a ventilation duct 2, which is a telescopic structure, allowing the outlet of the ventilation duct to be adjusted to be 1.1-3m from the indoor floor. The ventilation duct 2 can be connected to the indoor air conditioning unit 4 via a bend 3.

[0073] Ventilation duct 2 adopts a telescopic structure, which can adjust the distance between the outlet of the ventilation duct and the indoor floor according to actual needs. Because under different space conditions and different wind speed adjustments, it is crucial to adopt an appropriate distance to achieve better hot air diffusion efficiency.

[0074] Example 2:

[0075] In this embodiment, the hot air attachment distance in the air lake area is adjusted by adjusting the height of the air outlet from the ground. The relationship between the hot air attachment distance x in the air lake area and the height h of the air outlet is: x = 7.5 * h^(-0.8), h ∈ [1.1,3](R 2 =0.99, where R² is the coefficient of determination, a statistic that measures the goodness of fit. 2 The closer the value is to 1, the better the curve fit.

[0076] After the air jet adheres to the wall, the airflow continues to flow downwards along the wall to the ground. As the reverse pressure gradient increases, the jet body separates from the vertical wall and, upon impacting the ground, extends forward along the floor in a radial flow pattern, forming an "air lake area" (one side of the impact zone). (See below) Figure 6 )

[0077] Reference Figure 6 As shown, the vertical distance S between the central axis of the ventilation duct and the interior wall, and the width d of the air outlet of the ventilation duct, satisfy the ratio 0.5 ≤ S / d ≤ 2. This design allows the delivered airflow to form a wall-mounted airflow that adheres to the interior wall, further reducing its mixing with indoor polluted air or cold air, and improving the quality of the delivered air. The adhesion effect decreases as the value of s / d increases. When s / d < 2, an approximately fully adhered jet can be formed. The minimum value of s / d is 0.5; therefore, it is recommended to satisfy 0.5 ≤ S / d ≤ 2.

[0078] Example 3:

[0079] Based on the technical solutions described in Embodiments 1 and 2.

[0080] The aforementioned ventilation duct 2 includes a rectangular tube body, one end of which is connected to the air outlet of the indoor air conditioning unit via an elbow 3. The elbow design facilitates changing the airflow direction from the original air outlet of the indoor air conditioning unit; it also serves as a mechanical connection component for assembling the indoor air conditioning unit and the ventilation duct.

[0081] Based on the descriptions of Embodiments 1, 2, and 3, a heating air control method includes:

[0082] Get the current distance between the user and the air outlet of the indoor unit of the air conditioner, and set it to L;

[0083] Get the current user's activity time within the activity area and set it as t;

[0084] The distance L and time t mentioned above are sent to the controller, which dynamically adjusts the height h of the outlet of the air duct assembly from the indoor ground based on the obtained values.

[0085] Reference Figure 8 , Figure 9 as well as Figure 10 , Figure 11As shown, an adjustment model of the distance L and the height h is established, and the adjustment model is h = (L / 7.5)^(-1.25). This adjustment model is obtained based on numerical simulation. By adjusting the height of the air supply outlet from the ground, the hot air attachment distance in the air area is adjusted. According to the numerical simulation results, the hot air attachment distance x at different air supply heights h is obtained. The relationship between x and h is fitted in the origin software as: x = 7.5 * h^(-0.8), h ∈ [1.1, 3] (R 2 = 0.99, where R2 is the determination coefficient, which is a statistic for measuring the goodness of fit. The closer the value of R 2 is to 1, the better the curve fitting degree.) This formula reflects the true and objective law between the air supply height and the corresponding hot air attachment distance.

[0086] In the actual usage logic, the distance L between the user and the air outlet of the air conditioner is the value x that the hot air needs to attach to. Therefore, the air supply height h that the air outlet of the air conditioner needs to satisfy is deduced from L. Then the relationship between L and h is the same as the relationship between x and h. Replace x in the formula x = 7.5 * h^(-0.8) with L, and we get h = (L / 7.5)^(-1.25).

[0087] More specifically, when t > t1, the current distance L is fed back to the controller, denoted as x0, and the h value that triggered the previous adjustment action is denoted as x1. When x0 < x1, the air duct assembly rotates upward; when x0 > x1, the air duct assembly rotates downward and translates; when t ≤ t1, the h value is not fed back to the controller.

[0088] The value of t1 is 3 min < t1 < 5 min, and 3.5 min, 4 min, 5 min, etc. can also be selected, which is specifically set according to actual requirements. The purpose of setting this time is to adjust the height of the outlet of the air duct assembly from the indoor ground at any time within a certain time to better achieve the optimal utilization of energy.

[0089] Referring to Figure 7 As shown, in the specific working process, the human body recognition sensor 6 senses the position L of the human body from the air outlet and the time t since the last human body movement, and feeds back the hot air attachment distance x in the air area to the controller (a single-chip microcomputer is used in this embodiment) 7. The built-in program of the controller is h = (x / 7.5)^(-1.25), and the obtained air supply height h value is fed back to the driver 8. The driver 8 controls the stepping motor 9 to rotate the bearing 10, and the rotation of the bearing 10带动 the height of the corrugated hose 11, adjusts the height of the air supply outlet from the ground to h, and then meets the requirement of the attachment distance of x.

[0090] When t > t1, the current distance L is fed back to the controller, denoted as x0, and the h value that triggered the last adjustment action is denoted as x1. When x0 < x1, the air duct assembly rotates upward; when x0 > x1, the air duct assembly rotates downward and translates; when t ≤ t1, the h value is not fed back to the controller. Here, the value of t1 is 3min < t1 < 5min.

[0091] Specifically, the ventilation duct can use a corrugated hose 11, and the height of the corrugated hose 11 from the ground in its natural vertical state is 1.2m. The setting of 1.2m conforms to the distance in the normal working state.

[0092] Embodiment 4:

[0093] This embodiment is a numerical simulation. The selected room size is 10m × 4m × 2.8m, the air supply outlet size is 0.64m × 0.05m, and the height of the air supply outlet from the ground is 2.4m; the return air outlet size is 0.7m × 0.2m, the air supply speed is 5.24m / s, and the air supply temperature is 40°C. The attachment length is 3.8m.

[0094] Combined with Figure 12 and Figure 13 In the figure, different shaded colors represent different temperatures. See the temperature scale at the upper part of the figure. The darker the color, the lower the temperature. The following figure is the mixed ventilation simulation cloud diagram under the same working conditions. Comparing with the embodiments in the present invention, it can be seen that in the mixed ventilation, the upper part of the room is hot and the lower part is cold, while in the present invention, the hot air can be directly sent to the lower part of the room, and the temperature in the lower part of the room is higher.

[0095] Embodiment 5:

[0096] This embodiment conducts actual tests in the laboratory. The room size: 7m × 5.2m × 2.7m; the air supply outlet size is 0.64m × 0.05m; the height of the air supply outlet from the ground is 2.3m; the return air outlet size is 0.7m × 0.2m, the air supply speed is 5.20m / s, and the air supply temperature is 40°C. The measured attachment length is 4.0m. After the machine is turned on for 77 minutes, the vertical temperature difference at the most unfavorable point in the room is 2.44°C.

[0097] Embodiment 6:

[0098] This embodiment is a numerical simulation, and the selected room size is 10m × 4m × 2.8m, the air supply outlet size is 0.64m × 0.05m, and the height of the air supply outlet from the ground is 1.8m; the return air outlet size is 0.7m × 0.2m, the air supply speed is 5.24m / s, and the air supply temperature is 40°C. The attachment length is 4.5m.

[0099] Embodiment 7:

[0100] This embodiment is a numerical simulation. The room dimensions are selected as 10m × 4m × 2.8m, the air supply outlet size is 0.64m × 0.05m, the air supply outlet height from the ground is 1.2m, the return air outlet size is 0.7m × 0.2m, the air supply velocity is 5.24m / s, and the air supply temperature is 40℃. The attachment length is 6.5m.

[0101] Example 8:

[0102] This embodiment is a numerical simulation. The room dimensions are selected as 10m × 4m × 2.8m, the air supply outlet size is 0.64m × 0.05m, the air supply outlet height from the ground is 1.1m, the return air outlet size is 0.7m × 0.2m, the air supply velocity is 5.24m / s, and the air supply temperature is 40℃. The attachment length is 6.5m.

[0103] Example 9:

[0104] This embodiment is a numerical simulation. The room dimensions are selected as 10m × 4m × 2.8m, the air supply outlet size is 0.64m × 0.05m, the air supply outlet height from the ground is 1.0m, the return air outlet size is 0.7m × 0.2m, the air supply velocity is 5.24m / s, and the air supply temperature is 40℃. The attachment length is 6.4m.

[0105] Example 10:

[0106] This embodiment is a numerical simulation. The room dimensions are selected as 10m × 4m × 2.8m, the air supply outlet size is 0.64m × 0.05m, the air supply outlet height from the ground is 0.9m, the return air outlet size is 0.7m × 0.2m, the air supply velocity is 5.24m / s, and the air supply temperature is 40℃. The attachment length is 5.5m.

[0107] Example 11:

[0108] This embodiment is a numerical simulation. The room dimensions are selected as 10m × 4m × 2.8m, the air supply outlet size is 0.64m × 0.05m, the air supply outlet height from the ground is 0.6m, the return air outlet size is 0.7m × 0.2m, the air supply velocity is 5.24m / s, and the air supply temperature is 40℃. The attachment length is 6.0m.

[0109] Example 12:

[0110] This embodiment is a numerical simulation. The room dimensions are selected as 10m × 4m × 2.8m, the air supply outlet size is 0.64m × 0.05m, the air supply outlet height from the ground is 0.3m, the return air outlet size is 0.7m × 0.2m, the air supply velocity is 5.24m / s, and the air supply temperature is 40℃. The attachment length is 7.1m.

[0111] The data from Examples 4-12 have been summarized in the following table:

[0112]

[0113]

[0114] In summary, Examples 4-12 demonstrate that this solution completely solves the problem of existing air supply methods failing to deliver hot air to occupied spaces. It allows hot air to be delivered directly to the lower part of the room with minimal loss, effectively suppressing the upward movement of hot air and ensuring good horizontal diffusion of the hot airflow.

[0115] The detailed descriptions listed above are merely specific descriptions of feasible embodiments of the present invention, and are not intended to limit the scope of protection of the present invention. All equivalent embodiments or modifications made without departing from the spirit of the present invention should be included within the scope of protection of the present invention.

[0116] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0117] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A heating air system, characterized in that, include: An air conditioning indoor unit is mounted on an indoor wall. The return air vent of the indoor unit communicates with the indoor space, and the air outlet of the indoor unit is connected to an exhaust duct assembly. The extension line of the exhaust duct assembly's outlet is perpendicular to the indoor floor. The exhaust duct assembly is mounted on the upper part of any wall within the room. The exhaust duct assembly uses a ventilation duct, which is telescopic, allowing the outlet of the ventilation duct to be adjusted to 1.1-3 meters from the indoor floor. The vertical distance S between the central axis of the ventilation duct and the indoor wall, and the width d of the ventilation duct's air outlet, satisfy the ratio 0.5 ≤ S / d ≤ 2. The heating air system is equipped with a monitoring component and a controller. The monitoring component obtains the distance between the user and the air conditioning indoor unit and records it in the controller. The controller can dynamically adjust the height of the exhaust duct assembly's outlet from the indoor floor based on the current distance of the user from the air outlet of the indoor unit and the user's activity time within the activity area. The heating air control method of the heating air system includes: Get the current distance between the user and the air outlet of the indoor unit of the air conditioner, and set it to L; Get the current user's activity time within the activity area and set it as t; The distance L and time t mentioned above are sent to the controller, which dynamically adjusts the height h of the outlet of the air duct assembly from the indoor ground based on the obtained values. When t>t1, the current distance L is fed back to the controller and recorded as x0. The distance L that triggered the adjustment action last time is recorded as x1. When x0<x1, the air duct assembly rotates upward; when x0>x1, the air duct assembly translates and rotates downward; when x0=x1, the air duct assembly remains stationary; when t≤t1, no L value is fed back to the controller. Where t1 is a set constant.

2. The heating air system according to claim 1, characterized in that, The air supply surface formed by the ventilation duct is larger than the air supply surface of the air outlet of the indoor unit of the air conditioner.

3. A heating air system according to claim 1, characterized in that, The ventilation duct includes a rectangular tube, one end of which is connected to the air outlet of the indoor air conditioning unit via an elbow.

4. A method for controlling the heating air supply of a heating air supply system according to any one of claims 1 to 3, characterized in that, include: Get the current distance between the user and the air outlet of the indoor unit of the air conditioner, and set it to L; Get the current user's activity time within the activity area and set it as t; The distance L and time t mentioned above are sent to the controller, which dynamically adjusts the height h of the outlet of the air duct assembly from the indoor ground based on the obtained values.

5. A heating air control method according to claim 4, characterized in that, Establish an adjustment model for distance L and height h, wherein the adjustment model is h=(L / 7.5)^(-1.25).

6. A heating air control method according to claim 4 or 5, characterized in that, When t>t1, the current distance L is fed back to the controller and denoted as x0. The distance L that triggered the adjustment action last time is recorded as x1. When x0<x1, the air duct assembly rotates upward; when x0>x1, the air duct assembly moves downward and rotates; when x0=x1, the air duct assembly remains stationary; when t≤t1, no L value is fed back to the controller. Here, t1 is a set constant.

7. A heating air control method according to claim 6, characterized in that, The value of t1 is 3 minutes. <t1<5min。

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