Air mixing device, air temperature and humidity regulating device and total efficiency air conditioner

Abstract

The application relates to air conditioner technology and discloses a mixing device, an air temperature and humidity regulating device and a full-effect air conditioner. The mixing device comprises a fresh air inlet channel, an air outlet channel, a return air channel and an airflow mixing channel. One end of the fresh air inlet channel is used for connecting a fresh air fan, the other end of the fresh air inlet channel is connected with a right air inlet end of the airflow mixing channel, the air outlet channel is connected with a left air outlet end of the airflow mixing channel, the airflow mixing channel is formed between two airflow guide surfaces arranged oppositely, the airflow guide surfaces are formed by corresponding contour lines stretched along the front-back direction, and the contour lines are one section or the whole section of a curve satisfying the following polar equation: R 2 =A1 2 * cos2theta; the return air channel penetrates the lower airflow guide surface at the lower end upwards and is communicated with the airflow mixing channel, and the airflow mixing channel is configured to be capable of sucking air in the return air channel when the air flows from the right air inlet end to the left air outlet end. The mixing device has the advantages of small volume and good mixing uniformity.

Description

Technical Field

[0001] This invention relates to the field of air conditioning technology, and in particular to a mixer, an air temperature and humidity control device, and an all-in-one air conditioner. Background Technology

[0002] All-in-one air conditioners can regulate indoor air quality by introducing fresh air. When there is a large temperature difference between indoors and outdoors, directly introducing fresh outdoor air into the room will cause a significant change in the supply air temperature, resulting in discomfort for users. Chinese patent document CN215929771U discloses a mixing component and an air conditioner with the mixing component. It adopts an air mixing channel based on a traditional three-way structure (that is, the fluids in two pipes are merged into another pipe for mixing) to first mix the fresh air with the indoor return air, and then send it into the room through the air outlet. This solution can improve the user discomfort caused by directly introducing fresh air to a certain extent. However, since the airflow guiding surface of the air mixing channel in this solution is almost entirely a simple planar structure, there is a problem of uneven air mixing, resulting in uneven air temperature at different locations of the air outlet, and the user experience still needs to be improved.

[0003] Furthermore, most existing central air conditioning systems do not include a fresh air system. If the air mixer described in the aforementioned literature is used to mix the introduced fresh air with the indoor return air, the problem of uneven temperature at different locations of the air outlet will also exist. In addition, in order to effectively mix the fresh air and return air, the actual thickness and dimensions of such air mixers are often large. When applied in a residential environment, the air mixer will also occupy a large amount of indoor ceiling space, affecting the aesthetics of the decoration and the user experience. Summary of the Invention

[0004] One of the objectives of this invention is to provide a small-sized air mixer that can uniformly mix multiple streams of air.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] The air mixer includes a fresh air intake channel, an air outlet channel, a return air channel, and an airflow mixing channel. One end of the fresh air intake channel is used to connect to a fresh air fan, and the other end of the fresh air intake channel is connected to the right air intake end of the airflow mixing channel. The air outlet channel is connected to the left air outlet end of the airflow mixing channel.

[0007] The airflow mixing channel is formed between two airflow guiding surfaces arranged one above the other, and the airflow guiding surfaces are formed by stretching corresponding contour lines along the front-back direction, and the contour lines are a segment or the entire segment of a curve that satisfies the following polar coordinate equation:

[0008] R 2 =A1 2 ×cos2θ;

[0009] Where R is the polar radius length, the polar axis direction is consistent with the horizontal direction from left to right, θ is the polar angle, the range of θ for the polar coordinate equation of the upper airflow guiding surface profile is [-π / 4, 0], the range of θ for the polar coordinate equation of the lower airflow guiding surface profile is [0, π / 4], and the constant A1 is the length of the line segment between the start and end points of the corresponding polar coordinate equation curve.

[0010] The return air duct extends upward through the lower airflow guide surface located at the lower end and communicates with the airflow mixing duct. The airflow mixing duct is configured to draw in air from the return air duct when air flows from the right air intake end to the left air outlet end.

[0011] Furthermore, the upper airflow guiding surface and the lower airflow guiding surface are arranged on the upper and lower sides of the center surface of the airflow mixing channel, either centered or staggered.

[0012] Furthermore, the return air channel is formed between two guide surfaces arranged facing each other on the left and right. The guide surfaces are formed by stretching corresponding contour lines along the front-back direction, and the contour lines are a segment or the entire segment of a curve that satisfies the following polar coordinate equation:

[0013] R 2 =A2 2 ×cos2θ;

[0014] Where R is the polar diameter length, the polar axis direction is consistent with the vertical direction from bottom to top, θ is the polar angle, the range of θ for the polar coordinate equation of the left guide surface profile is [-π / 4, π], the range of θ for the polar coordinate equation of the right guide surface profile is [π / 4, π], and the constant A2 is the length of the line segment between the start and end points of the corresponding polar coordinate equation curve.

[0015] Furthermore, the left and right guide surfaces are arranged on the left and right sides of the center plane of the return air duct, either centered or staggered.

[0016] Furthermore, the right air intake section of the return air passage and the airflow mixing passage are connected.

[0017] The second objective of this invention is to provide an air temperature and humidity control device, which includes a temperature and humidity control module and the aforementioned air mixer. The temperature and humidity control module is connected to the left air outlet end of the air outlet channel. The temperature and humidity control module is equipped with a rear-end fan, and one end of the fresh air intake channel is connected to a fresh air fan.

[0018] Furthermore, the temperature and humidity control module includes a heat exchange humidifier and a PTC.

[0019] Furthermore, the air outlet of the temperature and humidity control module is connected to an air guide. The air guide has two air guide plates arranged facing each other on the left and right. The inner cavity of the air guide is divided into three chambers: left, middle and right by the two air guide plates. The left and right chambers are respectively provided with air outlets. The upper end of the middle chamber is provided with an air outlet, and the lower end is provided with an air inlet connecting the three chambers.

[0020] Furthermore, the surface of the air guide plate is formed by stretching a corresponding contour line along the front-back direction, and the contour line is a segment or the entire segment of a curve that satisfies the following polar coordinate equation:

[0021] R 2 =A3 2 ×cos2θ;

[0022] Where R is the polar diameter length, the polar axis direction is consistent with the vertical direction from bottom to top, θ is the polar angle, the polar coordinate equation of the surface contour line of the left air guide plate takes the value range of θ in [-π / 4, 0], the polar coordinate equation of the surface contour line of the right air guide plate takes the value range of θ in [0, π / 4], and the constant A3 is the length of the line segment between the start and end points of the corresponding polar coordinate equation curve.

[0023] A third objective of this invention is to provide an all-around air conditioner, which includes the aforementioned air temperature and humidity control device and ducts connected thereto for air intake and exhaust.

[0024] The ducts used for air intake and exhaust include fresh air ducts for intake and exhaust ducts for exhaust of mixed air.

[0025] The air mixer of this invention has the advantages of small size and good mixing uniformity. The airflow guiding surface of the airflow mixing channel in the air mixer no longer adopts a traditional planar structure, but is formed by stretching a segment or the entire segment of a specific polar coordinate equation curve back and forth. This allows the air mixer to uniformly mix the introduced air, resulting in a more uniform outlet air temperature. Moreover, the key to achieving the above effect lies in the two airflow guiding surfaces in the airflow mixing channel, which are formed by stretching back and forth. Therefore, in the initial design, they can be designed to be as thin as possible according to actual needs, thereby reducing the overall thickness of the air mixer and significantly reducing the space required for installation or modification.

[0026] The air temperature and humidity control device of the present invention, by setting up a mixer and a temperature and humidity control module, can achieve a similar effect to a full-function air conditioner. It can be used not only for the installation of new air conditioners, but also for the modification of existing air conditioners to increase their functionality. This modification not only saves the cost of replacing the entire air conditioning system to add functions, but also reduces costs. Furthermore, the mixer in this device can be made thinner, so the overall thickness of the device can also be reduced, which can save a lot of space for its installation and modification.

[0027] The all-in-one air conditioner of the present invention introduces outdoor fresh air and indoor air into a mixer for mixing before delivering them to the desired indoor environment, thereby reducing the temperature difference between fresh air and indoor air and improving user comfort. Attached Figure Description

[0028] Figure 1 This is a perspective view of the air mixer in the embodiment;

[0029] Figure 2 This is a schematic diagram of the mixer structure in the embodiment. Figure 1 ;

[0030] Figure 3 This is a schematic diagram of the polar coordinate equation curve in the embodiment;

[0031] Figure 4 This is a schematic diagram of the airflow direction in the airflow mixing channel and the return air channel in the embodiment;

[0032] Figure 5 This is a diagram of the all-in-one air conditioning system in the embodiment;

[0033] Figure 6 This is a schematic diagram of the air temperature and humidity control device in the embodiment;

[0034] Figure 7 This is a perspective view of the air guide in the embodiment;

[0035] Figure 8 This is a schematic diagram of the air guide in the embodiment;

[0036] Figure 9 This is a schematic diagram of the mixer structure in the embodiment. Figure 2 ;

[0037] Figure 10 This is a schematic diagram of the outlet air temperature detection results in the embodiment;

[0038] Figure 11 The enthalpy-humidity diagram is a specific example from the embodiments.

[0039] In the picture:

[0040] 1—Mixing Unit 1a—Fresh Air Intake Channel

[0041] 1b - Air outlet duct; 1c - Air return duct

[0042] 1d—Airflow mixing channel; 1d1—Airflow guiding surface

[0043] 1d1a – Upward airflow guiding surface; 1d1b – Downward airflow guiding surface

[0044] 1c1—Guide surface; 1c1a—Left guide surface

[0045] 1c1b – Right guide surface; 2 – Temperature and humidity control module

[0046] 3—Air guide 3a—Air guide plate

[0047] 3a1 - Left air guide plate; 3a2 - Right air guide plate

[0048] 3b – Air outlet of the air guide; 3c – Air inlet of the air guide

[0049] 4—Air temperature and humidity control device; 5—Fresh air duct

[0050] 6 - Air outlet duct; 7 - Filter screen. Detailed Implementation

[0051] To facilitate understanding by those skilled in the art, the present invention will be further described below with reference to embodiments and accompanying drawings. The content mentioned in the embodiments is not intended to limit the present invention.

[0052] The fresh air system in a full-efficiency air conditioner improves indoor air quality by introducing fresh outdoor air into the room. Normally, due to the significant temperature difference between outdoor and indoor air, if outdoor air is directly introduced into the room, users will notice a significant change in the supply air temperature, resulting in poor comfort. To address this issue, before the fresh outdoor air is introduced into the room, a suitable amount of indoor air is usually mixed evenly and its temperature adjusted through an indoor return air duct. This significantly reduces the temperature difference between the mixed fresh air and the indoor air, greatly minimizing the impact on user comfort when it is then introduced into the room.

[0053] In this embodiment, the general structure of the all-in-one air conditioner is as follows: Figure 5As shown, it mainly includes a fresh air duct 5, an air temperature and humidity control device 4, and an air outlet duct 6 for conveying the mixed air. The fresh air duct 5 and the air outlet duct 6 are connected to the air temperature and humidity control device 4, which can also input indoor return air. Thus, the outdoor fresh air and indoor return air are mixed in the device, and the temperature and humidity of the mixed air are adjusted. Then, it is delivered to the desired indoor environment through the air outlet duct 6. The air flow in the duct is powered by a fan (such as a negative pressure fan, centrifugal fan, etc.). Driven by the fan, the corresponding air can flow in the fresh air duct 5 and the air outlet duct 6.

[0054] Figure 6 The structure of the air temperature and humidity control device 4 is shown, which mainly includes a mixer 1, a temperature and humidity control module 2, and an air guide 3 connected in sequence. The temperature and humidity control module 2 includes a heat exchange humidifier and an isothermal dehumidification heating device (PTC). The mixer 1, heat exchange humidifier, and PTC are connected in sequence. The heat exchange humidifier has a built-in ultrasonic humidification device and an external heat pump for controlling air temperature and humidity. The PTC, also known as a PTC thermistor, can be a ceramic PTC. PTC can be used in heating devices that dehumidify without cooling. A rear-end fan is installed in the temperature and humidity control module 2 (the rear-end fan can be located at the air inlet or outlet of the temperature and humidity control module 2). A fresh air fan is installed in the fresh air intake channel 1a of the mixer 1 (the fresh air fan can be located at the inlet of the fresh air intake channel 1a).

[0055] The aforementioned air temperature and humidity control device 4 can significantly reduce the temperature difference between the mixed fresh air and the indoor air, thereby reducing the impact of the introduced fresh air on the user's physical comfort. To achieve the above effect, the air mixer 1 is the key component. Figure 1-2 The structure of the air mixer 1 is shown. It mainly includes a fresh air intake channel 1a, an air outlet channel 1b, a return air channel 1c, and an airflow mixing channel 1d. One end of the fresh air intake channel 1a is used to connect to the fresh air fan, and the other end of the fresh air intake channel 1a is connected to the right air intake end of the airflow mixing channel 1d. The air outlet channel 1b is connected to the left air outlet end of the airflow mixing channel 1d.

[0056] The airflow mixing channel 1d is formed between two airflow guiding surfaces 1d1 arranged one above the other facing each other, with two opposing end faces at the front and back. The shape of the airflow guiding surface 1d1 is crucial for the mixer 1 to achieve uniform mixing of fresh air and indoor return air. Figure 2 As can be seen, it is formed by stretching a curved contour line along the front-to-back direction. Specifically, this contour line (which can be referred to as "contour line one") is a segment or the entire segment of a curve that satisfies the following polar coordinate equation:

[0057] R 2 =A1 2 ×cos2θ;

[0058] Where R is the polar radius length, the polar axis direction is consistent with the horizontal direction from left to right, θ is the polar angle, the range of θ for the polar coordinate equation of the upper airflow guiding surface 1d1a profile is [-π / 4, 0], the range of θ for the polar coordinate equation of the lower airflow guiding surface 1d1b profile is [0, π / 4], and the constant A1 is the length of the line segment between the start and end points of the corresponding polar coordinate equation curve.

[0059] The return air duct 1c extends upward through the lower airflow guide surface 1d1b located at the lower end of the airflow mixing duct 1d and communicates with the airflow mixing duct 1d. The airflow mixing duct 1d is configured to draw air from the return air duct 1c into it when air flows from the right air intake end to the left air outlet end. In addition, a filter 7 (such as a high-permeability filter) can be installed in the return air duct 1c (e.g., the air intake end at the lower end of the return air duct 1c) to filter and purify the air.

[0060] The two airflow guiding surfaces 1d1 are the upper airflow guiding surface 1d1a located at the upper end of the airflow mixing channel 1d and the lower airflow guiding surface 1d1b located at the lower end of the airflow mixing channel 1d. For the contour line of the lower airflow guiding surface 1d1b, its corresponding polar coordinate equation curve can be referenced... Figure 3 In this figure, the left endpoint of the polar coordinate equation curve is the starting point, the right endpoint is the ending point, and the length of the horizontal line segment between the two endpoints is A (i.e., A1 in the above formula); where the polar radius length is R, the polar axis direction is consistent with the horizontal direction from left to right, and the polar angle is θ, the value range of θ is [0,π / 4]. When θ is 0, R=A, and when θ is π / 4, R=0.

[0061] In the airflow mixing channel 1d, the upper airflow guiding surface 1d1a and the lower airflow guiding surface 1d1b can be centrally aligned or staggered and positioned on the upper and lower sides of the central surface of the airflow mixing channel 1d. For example, Figure 2 In the middle section, the centers of the two airflow guiding surfaces 1d1 are offset. As shown in the figure, the center of the upper airflow guiding surface 1d1a is slightly to the left, and the center of the lower airflow guiding surface 1d1b is slightly to the right. Furthermore, the two airflow guiding surfaces 1d1 can also be symmetrically arranged on the upper and lower sides of the center surface of the airflow mixing channel 1d. In this embodiment, the positions of the two airflow guiding surfaces 1d1 can be determined according to specific circumstances, as can the size of the segment of the corresponding polar coordinate equation curve to be selected for the contour lines of the two airflow guiding surfaces 1d1.

[0062] In this embodiment, the return air duct 1c is formed between two opposing guide surfaces 1c1, one on the left and one on the right, with two opposing end faces at the front and rear. These two front and rear end faces are typically the same end face as the front and rear end faces in the airflow mixing duct 1d, and the distance between the front and rear end faces is usually constant. The shape of the guide surface 1c1 is also a crucial factor in the mixer 1's ability to uniformly mix fresh air with indoor return air. Figure 2 As can be seen, it is formed by stretching a curved contour line along the front-to-back direction. Specifically, this contour line (which can be called "contour line two") is a segment or the entire segment of a curve that satisfies the following polar coordinate equation:

[0063] R 2 =A2 2 ×cos2θ;

[0064] Where R is the polar diameter length, the polar axis direction is consistent with the vertical direction from bottom to top, θ is the polar angle, the range of θ for the polar coordinate equation of the left guide surface 1c1a profile is [-π / 4, π], the range of θ for the polar coordinate equation of the right guide surface 1c1b profile is [π / 4, π], and the constant A2 is the length of the line segment between the start and end points of the corresponding polar coordinate equation curve.

[0065] In this embodiment, the area of ​​the return air duct 1c gradually decreases from bottom to top (from the air inlet end to the air outlet end), that is, the distance between the two guide surfaces 1c1 gradually decreases from the lower air inlet end to the upper air outlet end. The two guide surfaces 1c1 are the left guide surface 1c1a located on the left side of the return air duct 1c and the right guide surface 1c1b located on the right side of the return air duct 1c. They can be center-aligned or staggered on the left and right sides of the center surface of the return air duct 1c. For example, Figure 2 In the middle, the two airflow guiding surfaces 1c1 are aligned at their centers. Moreover, the two airflow guiding surfaces 1d1 can also be symmetrically arranged on the left and right sides of the center plane of the return air duct 1c, depending on the specific situation.

[0066] Of course, the connection between the return air duct 1c and the airflow mixing duct 1d can also be formed by stretching a section or the entire section of the above polar coordinate equation curve along the front and back direction to form a curved surface, so that the guide surface 1c1 and the lower airflow guide surface 1d1b can form a coherent / continuous curved surface and form a Coanda effect, so that the air (indoor return air) that is close to the guide surface 1c1 can continue to flow close to the lower airflow guide surface 1d1b after flowing into the airflow mixing duct 1d.

[0067] By employing the aforementioned structure, the air mixer 1 in this embodiment not only achieves excellent air mixing, but also ensures that the two airflow guiding surfaces 1d1 in the airflow mixing channel 1d and the two guide surfaces 1c1 in the return air channel 1c are formed by front-to-back stretching. Even with a short stretching length, a good air mixing effect can still be produced. Therefore, the overall thickness of the air mixer 1 can be designed to be thinner, which can significantly reduce the space required for its installation or modification. Furthermore, applying the aforementioned air mixer 1 to the air temperature and humidity control device 4 can not only improve the air mixing effect but also help reduce the overall thickness of the equipment, thus saving indoor ceiling space required for installation or modification.

[0068] from Figure 2 As can be seen, the airflow mixing channel 1d exhibits a duct structure that gradually narrows and then widens again. The main change is in the distance between the two airflow guiding surfaces 1d1, while the distance between the front and rear end surfaces remains constant. Specifically, looking from right to left (i.e., from the right air intake end to the left air outlet end), the first half of the airflow mixing channel 1d (i.e., the area on the right side of the figure that gradually narrows) is the air intake section, where the channel area gradually decreases. The second half of the airflow mixing channel 1d (i.e., the area on the left side of the figure that gradually widens) is the air outlet section, where the channel area gradually increases. Viewed from bottom to top, the return air duct 1c exhibits a gradually narrowing duct structure. The upper end of the return air duct 1c (i.e., the outlet) typically connects to the intake section of the airflow mixing duct 1d. As fresh air enters the airflow mixing duct 1d, the duct gradually narrows, increasing kinetic energy and decreasing static pressure, resulting in increased airflow velocity and creating negative pressure. This allows the return air in the return air duct 1c to be drawn into the airflow mixing duct 1d for mixing. Since the return air duct 1c also has a gradually narrowing duct structure, the return air flows upwards, increasing its velocity and allowing it to enter the airflow mixing duct 1d more quickly, resulting in higher mixing efficiency. Furthermore, the airflow mixing duct 1d can create a mixing effect where airflows converge from multiple directions, leading to better uniformity of the mixed air.

[0069] Figure 7-8The structure of the air guide 3 is shown, which mainly includes two air guide plates 3a disposed inside it. The two air guide plates 3a are arranged facing each other from left to right, or they can be arranged symmetrically. The air guide 3 is hollow inside to form an inner cavity, which is divided into three chambers: left, middle, and right by the two air guide plates 3a. The left and right chambers are respectively provided with air outlets 3b, for example, one air outlet 3b on each side; the upper end of the middle chamber is provided with air outlets 3b, for example, two air outlets 3b are provided at the upper end, which can be symmetrically distributed on the upper sides of the air guide 3 from left to right (with the center plane between the two air guide plates 3a as the center of symmetry); the lower end of the middle chamber is provided with an air inlet 3c connecting the three chambers. There can be one air inlet 3c, which can cover all three chambers at the same time, so that air can be distributed to the three chambers.

[0070] In this embodiment, the distance between the two air guide plates 3a (left air guide plate 3a1 and right air guide plate 3a2) gradually increases from bottom to top, forming a trumpet shape. The surfaces of these two air guide plates 3a (including their inner and outer sides, i.e., their left and right sides) are formed by stretching corresponding contour lines (which can be called "contour line three") along the front-back direction. These contour lines are a segment or the entire segment of a curve that satisfies the following polar coordinate equation:

[0071] R 2 =A3 2 ×cos2θ;

[0072] Where R is the polar diameter length, the polar axis direction is consistent with the vertical direction from bottom to top, θ is the polar angle, the polar coordinate equation of the surface contour line of the left air guide plate 3a1 takes the value range of [-π / 4, 0], the polar coordinate equation of the surface contour line of the right air guide plate 3a2 takes the value range of [0, π / 4], and the constant A3 is the length of the line segment between the start and end points of the corresponding polar coordinate equation curve.

[0073] Among them, the constants A (including A1, A2, A3) in the polar coordinate equation curves selected for the airflow guiding surface 1d1, the guiding surface 1c1 and the connecting surface between them, as well as the surface of the wind guide plate 3a, can be the same or different, usually different. The length A of the line segment between the starting point and the ending point of their corresponding polar coordinate equation curves can be reasonably selected according to actual needs and wind tunnel or simulation test results.

[0074] In this embodiment, the fresh air duct 5 is connected to the right air inlet of the mixer 1, the temperature and humidity control module 2 is connected to the left air outlet of the mixer 1, the air outlet of the temperature and humidity control module 2 is connected to the air inlet 3c of the air guide 3, and the air outlet duct 6 is connected to the air outlet 3b of the air guide 3. The lower air inlet of the return air channel 1c in the mixer 1 does not require a duct connection, saving ductwork and reducing costs during installation and modification. Fans are installed in both the temperature and humidity control module 2 and the fresh air inlet channel 1a of the mixer 1. The rear fan in the temperature and humidity control module 2 provides negative pressure suction to power airflow, while the front fresh air fan in the fresh air inlet channel 1a of the mixer 1 provides positive pressure, also powering airflow. Typically, the rated power of the rear fan must be greater than the rated power of the fresh air fan. A fresh air valve can also be installed in the fresh air inlet channel 1a of the mixer 1 (e.g., at its front end) to control the fresh air volume. In addition, a fresh air sensor can be installed in the fresh air intake channel 1a, a return air sensor can be installed in the return air channel 1c, and a sensor for the mixed air can be installed at the air outlet of the temperature and humidity control module 2. These sensors can be used to detect air quality (such as temperature, humidity, PM2.5, formaldehyde, CO2, oxygen content, etc.). Air purification modules can also be installed in the fresh air intake channel 1a and the return air channel 1c to filter and purify the input air. Similarly, an air purification module can be installed at the air outlet of the temperature and humidity control module 2 or in the air guide 3 to filter and purify the mixed air.

[0075] For the aforementioned air mixer 1, the structure of its airflow mixing channel 1d and return air channel 1c can be designed as follows. The following example illustrates this using the scenario where both the rear-end fan and the fresh air fan operate at their rated power, with the rated power of the rear-end fan exceeding that of the fresh air fan. First, airflow is introduced into the air mixer 1. The distance between the upper and lower airflow guide surfaces 1d1 of the airflow mixing channel 1d (primarily referring to the narrowed section in the middle of the airflow mixing channel 1d) is adjusted to minimize the "whistling" sound within the airflow mixing channel 1d. Then, three points are selected in both the airflow mixing channel 1d and the return air channel 1c: point A is selected in the outlet section of the airflow mixing channel 1d; point B is selected in the inlet section of the airflow mixing channel 1d, located to the right of the right guide surface 1c1b; and point F is selected in the return air channel 1c, near the upper outlet of the return air channel 1c. To avoid pressure buildup in the rear-end fan, the exhaust airflow Q at the rear end of the airflow mixing channel 1d is... A It should be greater than the fresh air intake volume Q. B Neglecting pipeline losses, according to the principle of conservation of mechanical energy, the mechanical energy C of the air discharged from the airflow mixing channel 1d is... A The mechanical energy C greater than that of fresh air BLet the air pressure at the outlet end (point A) of the airflow mixing channel 1d be p. A The flow velocity is v A The height is h A The pressure of the fresh air (point B) is p. B The flow velocity is v B The height is h B The air intake volume of the return air (point F) is Q. F The pressure is p F The flow velocity is v F The height is h F Flow velocity v = air volume Q / channel cross-sectional area S; ρ is air density, g is gravitational acceleration; combining Bernoulli's principle, we have C A =p A +0.5ρv A 2 +ρgh A C B =p B +0.5ρv B 2 +ρgh B C F =p F +0.5ρv F 2 +ρgh F C A = C B + C F Then, C A - C B = C F ; where the gravitational potential energy of the air is neglected (the height difference between points A, B, and F is small, so the potential energy difference can be ignored); let p F >p B That is, p F -p B >0, then, (C) F -0.5ρv F 2 )-(C B -0.5ρv B 2 ) > 0, that is, C F -0.5ρv F 2 -C B +0.5ρv B 2 >0, C F -C B +0.5ρv B 2 -0.5ρv F 2 >0, substitute into CF =C A -C B Then, C A -2C B +0.5ρ(v) B 2 - v F 2 If ) > 0, then C A -2C B +0.5ρ[(Q B / S B ) 2 -(Q F / S F ) 2 >0, where mechanical energy C A C B Air volume Q B Channel cross-sectional area S B Air volume Q F Since both are constants and the air density ρ remains unchanged, the cross-sectional area S of the channel can be obtained from the above formula. F The range of this range is used to determine the structural dimensions of the return air duct 1c (the distance between its front and rear end faces has been predetermined, so what needs to be determined here is mainly the distance between the two guide surfaces 1c1, such as the distance between the two guide surfaces 1c1 at the exhaust end of the return air duct 1c). Furthermore, the airflow mixing duct 1d and the return air duct 1c obtained in this way, due to p F >p B The pressure in the return air duct 1c is greater than the pressure in the intake section of the airflow mixing duct 1d, thus preventing fresh air from flowing back into the return air duct 1c. This also allows the return air in the return air duct 1c to be drawn into it by the negative pressure generated by the fresh air flowing in the airflow mixing duct 1d. It should be noted that the above example essentially uses the right guide surface 1c1 as a reference to determine the position of the left guide surface 1c1.

[0076] In addition, in this embodiment, the air temperature and humidity control device 4 can adjust the power of the two fans according to the actual situation during operation, thereby changing the fresh air volume and return air volume. At the same time, the fresh air volume can be changed by controlling the opening of the fresh air valve, and thus the return air volume can be changed.

[0077] The technical principle of the aforementioned air guide 3 is as follows: Air entering from the lower air inlet is divided into three airflows by the two air guide plates 3a. Two of these airflows flow towards the two air outlets on the left and right sides, respectively, while one airflow flows from the middle towards the two air outlets at the top. The two airflows on the left and right sides can flow more effectively towards the outlets under the influence of the outer surfaces of the air guide plates 3a. Furthermore, the surface profile of the air guide plates 3a is formed by stretching a segment or the entire section of the aforementioned polar coordinate equation curve along the front-to-back direction, resulting in low wind resistance and reducing the impact of air deflection on airflow velocity. The middle airflow is evenly dispersed by the inner surfaces of the two air guide plates 3a on the left and right sides, ensuring that air is distributed to both upper air outlets and that the airflow towards these two outlets is relatively uniform.

[0078] Like the air mixer 1, the air guide 3 in this embodiment can be used not only in new air conditioners but also for retrofitting existing ones. During retrofitting, the air guide 3 can be directly installed at the air outlet of the air conditioning duct, which is simple and convenient. Furthermore, based on its structural characteristics, the front and rear widths of the two air guide plates 3a that guide the airflow can also be set to be relatively small, allowing the overall thickness of the air guide 3 to be designed to be thinner, thereby saving installation space.

[0079] The specific technical principle of the air mixer 1 in this embodiment is: fresh air ( Figure 4 (Solid arrow on the right) Entering the airflow mixing channel 1d from the right and flowing towards the left exit, the fresh air is divided into several parts by the airflow guiding surface 1d1. Two airflows move towards the left exit of the channel, closely following the upper and lower airflow guiding surfaces 1d1 under the Coanda effect. Two other airflows move towards the left side of the opposite region along directions tangent to the two airflow guiding surfaces 1d1. A third airflow is deflected by the upper airflow guiding surface 1d1a and moves towards the lower airflow guiding surface 1d1b. Return air ( Figure 4(Hollow arrow on the lower side) Enters the return air channel 1c from the lower side and flows towards the upper airflow mixing channel 1d. Due to the influence of the guide surface 1c1, the return air can be divided into several parts. Two airflows, under the Coanda effect, move closely along the left and right guide surfaces 1c1 towards the outlet at the upper end of the channel, reaching the intake section of the airflow mixing channel 1d and mixing with the fresh air flowing close to the lower airflow guide surface 1d1b. The airflow flowing close to the left guide surface 1c1a also mixes with the fresh air flowing tangentially along the upper airflow guide surface 1d1a in the airflow mixing channel 1d. Two airflows move towards the upper region on opposite sides along directions tangential to the two guide surfaces 1c1, entering the airflow mixing channel 1d and mixing with the fresh air flowing tangentially along the upper airflow guide surface 1d1a. The fresh air flowing along the lower airflow guide surface 1d1b mixes with the airflow flowing towards the airflow mixing channel 1d, and the airflow flowing tangentially to the right airflow guide surface 1c1b also mixes with the fresh air flowing tangentially to the upper airflow guide surface 1d1a. One stream of airflow flows directly into the airflow mixing channel 1d and mixes with the fresh air therein. In other words, multiple air mixing zones are formed in the airflow mixing channel 1d of the mixer 1. The combined effect of these air mixing zones allows for a more thorough mixing of fresh air and indoor return air, ensuring that airflow is distributed in both the middle and side areas of the channel outlet. This results in more dispersed and uniform mixed air, and a smaller temperature difference between the air in the middle and on the sides of the outlet channel 1b. For specific airflow directions, please refer to [reference needed]. Figure 4 .

[0080] The mixing effect of air mixer 1 was tested in an ultra-low temperature heat recovery integrated enthalpy difference laboratory. The test results showed that air mixer 1 can uniformly mix the introduced air. Specifically, during the experiment, two airflows were introduced into air mixer 1, and five sampling points at different locations were set on the diagonal line of the outlet channel 1b of air mixer 1 (see attached diagram). Figure 9 (The five testing points are numbered 107-111 respectively.) The outlet air temperature at each sampling point was measured. The test results can be found in the appendix. Figure 10 As can be seen from the test results in the attached figure, the maximum difference in the outlet air temperature of these 5 sampling points is no more than 3℃ (the maximum difference is only 3℃), indicating that the outlet air temperature of the sampling points at different locations is not much different. Moreover, the outlet air temperature of the sampling point in the middle is also very small compared with the outlet air temperature of the sampling points on both sides. This shows that the air mixed by the air mixer 1 in this embodiment is very uniform.

[0081] In addition, under the action of the above-mentioned air mixer 1, the all-in-one air conditioner and air temperature and humidity control device 4 in this embodiment makes the mixed air more uniform, which is also conducive to the precise control of the air outlet parameters and can reduce the energy consumption caused by inaccurate control, thereby achieving the effect of energy saving.

[0082] The following is a brief introduction to the working principle of the above-mentioned all-in-one air conditioner.

[0083] When only temperature adjustment is needed in the indoor environment, it is not necessary to introduce outdoor fresh air. Simply turn off the fresh air fan and fresh air valve, turn on the back-end fan, and introduce indoor return air into the air mixer 1 to circulate the indoor air and use the heat exchanger and humidifier to adjust the temperature. When the oxygen content in indoor air is low, the back-end fan, fresh air fan, and fresh air valve can be turned on to introduce fresh outdoor air to replenish indoor oxygen. When the content of toxic substances in indoor air exceeds the standard, indoor air can be exhausted, and the back-end fan, fresh air fan, and fresh air valve can be turned on to introduce fresh outdoor air to replace the old indoor air and purify the indoor environment. When the indoor air humidity is not up to standard and the indoor humidity is low while the outdoor humidity is high, the back-end fan, fresh air fan, and fresh air valve can be turned on to introduce fresh outdoor air to balance the indoor air humidity. When there is a difference in humidity and temperature between the outdoor fresh air and the indoor return air, the air temperature and humidity can be adjusted by using a heat exchange humidifier and a PTC (where, if the heat exchange humidifier achieves dehumidification without cooling, the PTC is turned on for heating to achieve isothermal dehumidification). In addition, when the indoor and outdoor temperature difference is small and the indoor humidity is high, the indoor humidity can also be adjusted by introducing dry outdoor air. Furthermore, for example, in winter in both northern and southern regions, when the indoor and outdoor air moisture content is low, the humidification function can be activated by the air temperature and humidity control device 4 of the all-effect air conditioner to regulate indoor humidity. It should be noted that the above methods are merely some common operating modes in practical applications, and the operating modes of the all-effect air conditioner in this embodiment include, but are not limited to, the above methods.

[0084] Furthermore, when indoor humidity is low and outdoor humidity is high, and fresh outdoor air is introduced to regulate indoor humidity, the operating power of the all-in-one air conditioner can be controlled based on the intake and exhaust air volumes, thereby ensuring that the humidity of the exhaust air reaches the required level. A specific example is provided below to illustrate this. Figure 11 Two points on the enthalpy-humidity diagram (the newly established point and newly established point 1 shown in the diagram) are used as test points. Specifically, the parameters of the newly established point (which can be regarded as the required indoor target environmental parameters) are used as the required supply air conditions (i.e., return air conditions), and the parameters of newly established point 1 (which can be regarded as the outdoor environmental parameters in summer) are used as the outdoor air conditions. The parameters of the newly established point are as follows: dry bulb temperature: 23.0℃; humidity temperature: 16.2℃; relative humidity: 50.0%; moisture content: 8.9g / kg; enthalpy: 45.9KJ / kg; dew point temperature: 11.9℃; density: 1.161kg / m³ 3The parameters for newly established point 1 are as follows: dry-bulb temperature: 36.0℃; humidity temperature: 31.9℃; relative humidity: 75.0%; moisture content: 29.3 g / kg; enthalpy: 111.4 KJ / kg; dew point temperature: 30.8℃; density: 1.099 kg / m³ 3 With a fresh air volume of 350m³ 3 / h, return air volume is 350m³ 3 / h, air supply volume (outflow volume) is 700m³ / h. 3 For example, the total energy value of the return air is 350m³ / h. 3 / h×1.161kg / m 3 ×45.9KJ / kg=18651.465KJ / h; The total energy value of the fresh air is: 350m³ 3 / h×1.099kg / m 3 ×111.4KJ / kg=42850.01KJ / h; Total energy value of the outlet air is: 700m 3 / h×1.161kg / m 3 ×45.9KJ / kg=37302.93KJ / h; The total energy value of the mixed air after fresh air and return air is: 18651.465KJ / h+42850.01KJ / h=61501.475KJ / h; The difference between the total energy value of the mixed air and the total energy value of the outlet air is: 61501.475KJ / h-37302.93KJ / h=24198.545KJ / h. Therefore, the power required for a full-effect air conditioner is 24198.545KJ / h÷3600=6.72KW (other building heat loads are not considered here).

[0085] In addition to the above-mentioned air temperature and humidity control device 4 and other functional modules, the above-mentioned all-in-one air conditioner may also include other system modules such as refrigeration system and heating system. The operating principle of these system modules is similar to that of existing all-in-one air conditioners. For the purpose of simplifying the description, the above content will not be repeated.

[0086] The above description is merely a preferred embodiment of the present invention. Any content that does not depart from the technical solution of the present invention shall still fall within the patent scope of the technical solution of the present invention.

Claims

1. A mixing device, comprising a fresh air intake channel (1a), an air outlet channel (1b), a return air channel (1c), and an airflow mixing channel (1d), wherein one end of the fresh air intake channel (1a) is connected to a fresh air fan, the other end of the fresh air intake channel (1a) is connected to the right air intake end of the airflow mixing channel (1d), and the air outlet channel (1b) is connected to the left air outlet end of the airflow mixing channel (1d), characterized in that: The airflow mixing channel (1d) is formed between two airflow guiding surfaces (1d1) arranged one above the other and facing each other. The airflow guiding surfaces (1d1) are formed by stretching a corresponding contour line in the front-back direction, and the contour line is a segment or the entire segment of a curve that satisfies the following polar coordinate equation: R 2 =A1 2 ×cos2θ; Where R is the polar radius length, the polar axis direction is consistent with the horizontal direction from left to right, θ is the polar angle, the range of θ for the polar coordinate equation of the upper airflow guiding surface (1d1a) profile is [-π / 4, 0], the range of θ for the polar coordinate equation of the lower airflow guiding surface (1d1b) profile is [0, π / 4], and the constant A1 is the length of the line segment between the start and end points of the corresponding polar coordinate equation curve; The return air duct (1c) extends upward through the lower airflow guide surface (1d1b) located at the lower end and communicates with the airflow mixing duct (1d). The airflow mixing duct (1d) is configured to draw in air from the return air duct (1c) when air flows from the right air intake end to the left air outlet end.

2. The air mixer according to claim 1, characterized in that: The upper airflow guiding surface (1d1a) and the lower airflow guiding surface (1d1b) are arranged on the upper and lower sides of the center surface of the airflow mixing channel (1d) with the center aligned or staggered.

3. The air mixer according to claim 1, characterized in that: The return air channel (1c) is formed between two guide surfaces (1c1) arranged facing each other on the left and right. The guide surfaces (1c1) are formed by stretching a corresponding contour line in the front-back direction, and the contour line is a segment or the entire segment of a curve that satisfies the following polar coordinate equation: R 2 =A2 2 ×cos2θ; Where R is the polar diameter length, the polar axis direction is consistent with the vertical direction from bottom to top, θ is the polar angle, the value of θ for the polar coordinate equation of the left guide surface (1c1a) profile is -π / 4 or π, the value of θ for the polar coordinate equation of the right guide surface (1c1b) profile is π / 4 or π, and the constant A2 is the length of the line segment between the start and end points of the corresponding polar coordinate equation curve.

4. The air mixer according to claim 3, characterized in that: The left guide surface (1c1a) and the right guide surface (1c1b) are arranged on the left and right sides of the center surface of the return air duct (1c) with the center aligned or staggered.

5. The air mixer according to claim 1, characterized in that: The return air passage (1c) and the airflow mixing passage (1d) are connected on the right side of the air intake section.

6. An air temperature and humidity control device, characterized in that: The device includes a temperature and humidity control module (2) and a mixer as described in any one of claims 1-5. The temperature and humidity control module (2) is connected to the left air outlet of the air outlet channel (1b). The temperature and humidity control module (2) is equipped with a rear-end fan. One end of the fresh air intake channel (1a) is connected to a fresh air fan.

7. The air temperature and humidity control device according to claim 6, characterized in that: The temperature and humidity control module (2) includes a heat exchanger and a PTC.

8. The air temperature and humidity control device according to claim 6, characterized in that: The air outlet of the temperature and humidity control module (2) is connected to an air guide (3). The air guide (3) has two air guide plates (3a) arranged facing each other on the left and right. The inner cavity of the air guide (3) is divided into three chambers: left, middle and right by the two air guide plates (3a). The left and right chambers are respectively provided with air outlets (3b). The upper end of the middle chamber is provided with an air outlet (3b), and the lower end is provided with an air inlet (3c) connecting the three chambers.

9. The air temperature and humidity control device according to claim 8, characterized in that: The surface of the air guide plate (3a) is formed by stretching a corresponding contour line along the front-back direction, and the contour line is a segment or the entire segment of a curve that satisfies the following polar coordinate equation: R 2 =A3 2 ×cos2θ; Where R is the polar diameter length, the polar axis direction is consistent with the vertical direction from bottom to top, θ is the polar angle, the polar coordinate equation of the surface contour line of the left guide plate (3a1) takes the value range of θ in [-π / 4, 0], the polar coordinate equation of the surface contour line of the right guide plate (3a2) takes the value range of θ in [0, π / 4], and the constant A3 is the length of the line segment between the start and end points of the corresponding polar coordinate equation curve.

10. An all-around air conditioner, characterized in that: It includes the air temperature and humidity control device as described in any one of claims 6-9 and the duct connected thereto for air intake and exhaust.

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