Double-deck flow automobile air conditioner box and air conditioning system

Abstract

The utility model discloses a kind of middle-mounted double-layer flow automobile air conditioner box and air conditioning system, including air inlet box and fixed in the air inlet box one side and with the air inlet box intercommunication volute, in air inlet box middle part is equipped with a filter, the filter will air inlet box be divided into air inlet section and air guide section;Air inlet section outer end of air inlet box is equipped with outer circulation air inlet, in air inlet section, the upper and lower sides of one end close to filter are respectively equipped with first inner circulation air inlet and second inner circulation air inlet;Air inlet section in air inlet box is equipped with an air intake partition plate with one end close to filter and a piece of inner air intake partition plate fixedly connected with air intake partition plate, the air intake partition plate will air inlet section be divided into first heat exchange air duct and second heat exchange air duct, the inner air intake partition plate will second heat exchange air duct be divided into left air duct and right air duct, first air door and second air door can be rotatably installed in left air duct, right air duct respectively, third air door can be rotatably installed in first heat exchange air duct.

Description

Technical Field

[0001] This utility model relates to the field of automotive air conditioning, specifically to a centrally located dual-layer automotive air conditioning unit and air conditioning system. Background Technology

[0002] Traditional automotive air conditioning systems switch between recirculation and external airflow by changing the position of the vents. When the vents are completely closed, the external airflow inlet is fully open, and the external airflow is the sole source of air for the air conditioning system; in this mode, the air conditioning is in external airflow mode. Conversely, when the vents are completely closed, the internal airflow inlet is fully open, and the internal airflow is the sole source of air for the air conditioning system; in this mode, the air conditioning is in recirculation mode. In autumn and winter, the outside air is relatively dry, with low humidity and significantly lower temperatures, while the interior air has higher humidity and is closer to the air conditioning's target temperature. However, using only internal airflow can easily cause fogging and result in a poor viewing experience. Therefore, it is necessary to introduce some external airflow to cool the face and prevent fogging on the windows—this is the purpose of a dual-flow air conditioning system.

[0003] Chinese Patent No. 215096889 discloses a centrally located dual-layer air intake unit and air intake box assembly, including an air intake box and a volute, with the volute connected to the air intake box. The volute is internally divided into an internal circulation duct and an external circulation duct by a partition. It also includes an internal circulation damper and an external circulation damper with openings set on the air intake box. The internal and external circulation dampers are independently arranged side-by-side on the air intake box, with their axes collinear. The internal circulation damper matches the internal circulation duct, and the external circulation damper matches the external circulation duct. This air conditioning intake unit solves the problem of synchronous air intake of internal and external air in a centrally located dual-layer air conditioning box, reducing ventilation loss during heating load and improving heating efficiency and driving comfort. However, its internal and external circulation dampers are arranged side-by-side, and the adjustment range for the ratio of internal to external airflow is small, making it unsuitable for different users' flexible adjustments of internal and external airflow. Summary of the Invention

[0004] In view of the above-mentioned shortcomings of the existing technology, the purpose of this utility model is to provide a centrally located dual-layer flow automotive air conditioning unit and air conditioning system, which solves the problem that the existing dual-layer flow air intake unit has a small adjustment range of internal and external air circulation ratio and cannot flexibly adjust the air intake ratio in multiple ranges according to different seasons and different user needs.

[0005] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0006] A centrally located dual-layer flow automotive air conditioning unit includes an air intake box and a volute fixed to one side of the air intake box and connected to it. A filter is installed in the middle of the air intake box, which divides the air intake box into an air intake section and an air guide section. An external circulation air inlet is provided at the outer end of the air intake section of the air intake box, and a first internal circulation air inlet and a second internal circulation air inlet are respectively provided on the upper and lower sides of the air intake section near the filter end. Inside the air intake section of the air intake box, there is an air intake baffle with one end tightly attached to the filter and an inner air intake baffle fixedly connected to the air intake baffle. The air intake baffle divides the air intake section into a first heat exchange air passage and a second heat exchange air passage. The inner air intake baffle divides the second heat exchange air duct into a left air intake duct and a right air intake duct. A first damper and a second damper are rotatably installed in the left and right air intake ducts, respectively, while a third damper is rotatably installed in the first heat exchange air duct. All three dampers are connected to a damper drive mechanism and rotate under its control to adjust their opening and closing angles. A guide tube is provided inside the air inlet box. One end of the guide tube abuts against the filter and corresponds to either the first or second heat exchange air duct, while the other end extends into the volute. Inner and outer guide air ducts are formed on the inner and outer sides of the guide tube, respectively. Thus, after the turbine rotates, a low-pressure zone is formed at the center of the volute, and fresh external air is drawn in from the air inlet box. After installing an intake baffle in the air intake section within the air intake box, when fresh outside air enters through the external air intake, it is divided into two paths: one is the first heat exchange air duct, and the other is the second heat exchange air duct. Simultaneously, the inner end of this intake baffle abuts against the filter and corresponds to the air guide tube, preventing air mixing. An inner intake baffle is then installed on the second heat exchange air duct, further dividing it into two parts. Thus, the intake baffle and inner intake baffle divide the air intake section into three air ducts, each with a corresponding damper. By controlling the damper to rotate to a certain angle, the internal air intake, external air intake, and the corresponding portion of the internal air intake in the left or right air intake duct can be fully opened (one side of the left and right air intake ducts corresponds to the inner air guide duct along with the second heat exchange air duct), enabling flexible control of the internal and external air intake ratio across multiple ranges. For example, during autumn and winter, the third damper corresponding to the second heat exchange duct is fully opened and abuts against the end of the intake baffle near the external air intake, blocking some of the external airflow from entering. Simultaneously, the damper on the same side as the guide tube is opened, allowing most of the external airflow to enter the first heat exchange duct before entering the inner guide tube and blowing towards the feet. The high intake temperature of the recirculated air inside the vehicle achieves energy saving. At the same time, some of the internal airflow enters the first heat exchange duct, mixes with the external airflow, and then passes through the outer guide tube to the upper air outlet of the volute, blowing on the face and defrosting / defogging, effectively achieving energy saving.

[0007] Furthermore, the widths of both the first and second internal circulation air inlets are equal to the width of the air inlet box. The first internal circulation air inlet is connected to the first heat exchange air duct, and the second internal circulation air inlet is connected to the second heat exchange air duct. The internal air intake baffle is vertically arranged, ensuring that the air intake ratio of the first heat exchange air duct is 50%. By setting the internal circulation air inlet to be the same width as the air inlet box, the internal circulation air can be quickly introduced. And by dividing the air intake ratio of the first heat exchange air duct into 50% by the internal air intake baffle, when only the first or second air damper is opened, the internal circulation air volume can reach 75%.

[0008] Furthermore, the air intake partition is integrally formed with the air intake box and is arranged along the airflow direction of the air intake section, so that the air intake ratio of the first heat exchange air passage and the second heat exchange air passage is 50%. In this way, the air intake section can be divided proportionally, and the external circulation or internal circulation air intake can be achieved by controlling the air damper to achieve 50% or 0%.

[0009] Furthermore, the diameter of the guide tube gradually increases from the middle to both ends, corresponding to the first heat exchange air passage. In this way, the airflow entering the guide tube only narrows and accelerates before entering the expansion section, which can decelerate and diffuse the airflow, converting part of the kinetic energy into static pressure, making the airflow entering the turbine more stable; it can also constrain the airflow along the axial direction, reducing wind resistance and wind noise.

[0010] Furthermore, the air inlet box is provided with a rectangular annular groove that fits snugly with the filter. One end of the guide tube is bent outward to form an outer edge, which is then locked into the rectangular annular groove and fixedly connected to the air inlet box. This makes the installation and removal of the guide tube convenient and allows for flexible adjustment.

[0011] Furthermore, both the first and second internal circulation air inlets are equipped with grilles integrally formed with the air intake box. This effectively blocks impurities from entering the air duct and increases the strength of the air intake box.

[0012] On the other hand, this utility model also provides an air conditioning system, which includes the centrally located dual-layer flow automotive air conditioning unit as described above. Attached Figure Description

[0013] Figure 1 This is a cross-sectional structural diagram of the centrally located dual-layer automotive air conditioning unit in Example 1.

[0014] Figure 2 This is a bottom view of the centrally located dual-layer automotive air conditioning unit of Example 1;

[0015] Figure 3 for Figure 2 Schematic diagram of the cross-sectional structure of AA;

[0016] Figure 4 for Figure 2 Schematic diagram of the cross-sectional structure of BB;

[0017] Figure 5 This is a side view of a centrally located, dual-layer flow automotive air conditioning unit. Detailed Implementation

[0018] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of this utility model provided in the accompanying drawings is not intended to limit the scope of the claimed utility model, but merely represents selected embodiments of the utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without inventive effort are within the scope of protection of this utility model.

[0019] It should be noted that similar reference numerals and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures. In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the figures, or the orientation or positional relationship commonly used when the product is in use. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," and "third," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance. In addition, the terms "horizontal," "vertical," etc., do not indicate that the component is required to be absolutely horizontal or suspended, but can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal than "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted. In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0020] The air conditioning system is a crucial element related to passenger comfort. A centrally located dual-layer air conditioning unit offers significant advantages in expanding passenger space and energy efficiency. However, the air intake of existing centrally located dual-layer air conditioning units is limited by passenger space constraints, resulting in a narrow range of dual-layer air intake ratios and hindering efficient energy saving. Therefore, this embodiment improves the existing dual-layer air intake structure to achieve multi-range adjustment of the internal and / or external air intake ratios.

[0021] Example 1:

[0022] refer to Figures 1-5As shown, the mid-mounted dual-layer flow automotive air conditioning unit provided in this embodiment includes an air intake box 2 and a volute 1 fixed to one side of the air intake box 2 and connected to the air intake box 2. A turbine is provided inside the volute 1, and an upper air outlet channel and a lower air outlet channel are provided on the volute 1. A filter 3 is installed in the middle of the air intake box 2, and the filter 3 divides the air intake box 2 into an air intake section and an air guide section. An external circulation air inlet 21 is provided at the outer end of the air intake section of the air intake box 2, and a first internal circulation air inlet 22 and a second internal circulation air inlet 23 are respectively provided on the upper and lower sides of the air intake section near the filter 3. An air intake baffle 24 with one end tightly attached to the filter 3 and an inner air intake baffle 25 fixedly connected to the air intake baffle 24 are provided in the air intake section of the air intake box 2. The air intake baffle 24 divides the air intake section into a first heat exchange air passage 26 and a second heat exchange air passage 27. The first internal circulation air inlet 21 is located at the outer end of the air intake section of the air intake box 2. 2 is connected to the first heat exchange air passage 26, and the second internal circulation air inlet 23 is connected to the second heat exchange air passage 27. The internal air inlet baffle 25 divides the second heat exchange air passage 27 into a left air inlet and a right air inlet, and divides the second internal circulation air inlet 23 into a left internal circulation air inlet and a right internal circulation air inlet. A first damper 6 and a second damper 7 are rotatably installed in the left air inlet and the right air inlet, respectively. A third damper 5 is rotatably installed in the first heat exchange air passage 26. The first damper 6, the second damper 7 and the third damper 5 are all connected to a damper drive mechanism and rotate under the control of the damper drive mechanism to adjust the opening and closing angle of the damper. A guide tube 4 is provided in the air guide end of the air inlet box 2. One end of the guide tube 4 abuts against the filter 3 and corresponds to the first heat exchange air passage 26, and the other end extends into the volute 1. The inner and outer sides of the guide tube 4 form an inner guide air passage and an outer guide air passage, respectively. In this way, after the turbine rotates, a low-pressure zone is formed at the center of the volute 1, and fresh air from outside is drawn in from the air intake box 2. After the air intake section inside the air intake box 2 is equipped with an intake baffle 24, when fresh air from outside enters through the external circulation air intake 21, it is divided into two paths: one is the first heat exchange air passage 26, and the other is the second heat exchange air passage 27. At the same time, the inner end of the intake baffle 24 abuts against the filter 3 and corresponds to the guide tube 4 to prevent air mixing. After the inner intake baffle 25 is installed on the second heat exchange air passage 27, the second heat exchange air passage 27 can be further divided into two parts. Furthermore, the air intake baffle 24 and the inner air intake baffle 25 divide the air intake section into three air passages. At the same time, a corresponding damper is set in each air passage. Finally, by controlling the damper to rotate to a certain angle, the inner circulation air intake, the outer circulation air intake 21, and the corresponding part of the inner circulation air intake of the left or right air intake passage (where one side of the left and right air intake passages corresponds to the inner guide air passage along with the second heat exchange air passage 27) can be fully opened, so as to achieve flexible control of the ratio of inner and outer circulation air intake in multiple ranges.For example, in autumn and winter, the third damper 5 at the corresponding location of the second heat exchange duct 27 is fully opened and abuts against the end of the intake partition 24 near the external circulation intake port 21, blocking part of the external circulation air from entering. At the same time, after opening the damper on the same side as the end adjacent to the guide tube 4, most of the external circulation air enters the first heat exchange duct 26 and then enters the inner guide tube of the guide tube 4, blowing towards the feet. The circulating air inside the vehicle has a high intake air temperature zone, which can achieve the purpose of energy saving. At the same time, some of the internal circulation air enters the first heat exchange duct 26, mixes with the external circulation air after heat exchange, and then passes through the outer guide tube to the upper air outlet channel of the volute 1, blowing on the face and defrosting and defogging, achieving the purpose of effective energy saving.

[0023] To achieve five air intake modes—0%, 25%, 50%, 75%, and 100% internal air ratio—the installation structure of the air intake partition 24 and the inner air intake partition 25 in this embodiment is as follows: The air intake partition 24 is integrally formed with the air intake box 2 and is arranged along the airflow direction of the air intake section, so that the air intake ratio of the first heat exchange air passage 26 and the second heat exchange air passage 27 is 50%. The widths of the first internal circulation air inlet 22 and the second internal circulation air inlet 23 are both equal to the width of the air intake box 2; the inner air intake partition 25 is vertically arranged, so that the air intake ratio of the first heat exchange air passage 26 is 50%. In this way, setting the internal circulation air inlet to be the same width as the air intake box 2 allows for rapid introduction of internal circulation air. The inner air intake partition 25 divides the air intake ratio of the second heat exchange air passage 27 into 50%, and the air intake partition 24 allows the internal circulation air to reach 75% when only the first damper 6 or the second damper 7 is opened.

[0024] Specifically, when the first damper 6, the second damper 7, and the third damper 5 rotate at a certain angle, they completely close the first internal circulation air inlet 22 and the second internal circulation air inlet 23, resulting in zero internal circulation air intake. When the first damper 6, the second damper 7, and the third damper 5 rotate at a certain angle, they open the first internal circulation air inlet 22 and the second internal circulation air inlet 23, and after abutting against the air intake partition 24, the path to the external circulation air inlet 21 is blocked, achieving a 100% internal circulation air intake ratio. When the third damper 5 rotates at a certain angle, opening the first internal circulation air inlet 23, and the first damper 6 and the second damper 7 completely close the second internal circulation air inlet 23, the internal circulation air intake ratio is 50%. When the third damper 5 opens the first internal circulation air inlet 22, and the first damper 6 or the second damper 7 rotates at a certain angle, opening one of the left and right internal circulation air inlets, the internal circulation air intake ratio is 75%. When the third damper 5 closes the first internal circulation air inlet 22, and the first damper 6 or the second damper 7 rotates at a certain angle so that one of the left internal circulation air inlet and the right internal circulation air inlet opens, the internal circulation air intake ratio is 25%.

[0025] Of course, in specific implementation, the installation positions of the intake baffle 24 and the inner intake baffle 25 can be adjusted according to actual needs to adjust the proportion of internal recirculation intake. However, using the above structure, it is still possible to achieve five internal recirculation intake modes. The first, second, and third dampers can be controlled independently by a single motor driving a cam disc. Alternatively, each damper can be controlled by a separate control mechanism. The structure of the motor and cam disc driving the damper rotation is an existing structure and will not be described in detail here.

[0026] Furthermore, the diameter of the guide tube 4 gradually increases from the middle to both ends, corresponding to the first heat exchange air passage 26. In this way, the airflow entering the guide tube 4 only narrows and accelerates before entering the expansion section, which can decelerate and diffuse the airflow, converting part of the kinetic energy into static pressure, making the airflow entering the turbine more stable; it can also constrain the airflow along the axial direction, reducing wind resistance and wind noise.

[0027] Furthermore, the air inlet box 2 is provided with a rectangular annular groove that fits snugly with the filter 3. One end of the guide tube 4 is bent outward to form an outer edge, which is then fixedly connected to the air inlet box 2 after being inserted into the rectangular annular groove. In this way, the guide tube 4 is easy to install and remove, and can be flexibly adjusted.

[0028] Furthermore, both the first internal circulation air inlet 22 and the second internal circulation air inlet 23 are equipped with grilles integrally formed with the air inlet box 2. In this way, the grilles can effectively block impurities from entering the air duct and effectively increase the strength of the air inlet box 2.

[0029] Example 2

[0030] The only difference between the centrally located dual-layer flow automotive air conditioning unit provided in this embodiment and Embodiment 1 is that the end of the guide tube 4 near the filter 3 corresponds to the first heat exchange air passage 26. Compared with Embodiment 1, this embodiment has slightly fewer internal recirculation air intake modes.

[0031] Example 3

[0032] Based on the automotive air conditioning unit disclosed in Embodiments 1 and 2, this utility model also provides an air conditioning system, which includes the centrally located dual-layer flow automotive air conditioning unit as described above.

[0033] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model and not to limit the technical solutions. Those skilled in the art should understand that any modifications or equivalent substitutions to the technical solutions of this utility model that do not depart from the spirit and scope of this technical solution should be covered within the scope of the claims of this utility model.

Claims

1. A centrally located dual-layer flow automotive air conditioning unit, comprising an air intake box and a volute fixed to one side of the air intake box and communicating with the air intake box, wherein a filter is installed in the middle of the air intake box, the filter dividing the air intake box into an air intake section and an air guide section; characterized in that, An external circulation air inlet is provided at the outer end of the air inlet section of the air inlet box. A first internal circulation air inlet and a second internal circulation air inlet are respectively provided on the upper and lower sides of the air inlet section near the filter. Inside the air inlet section of the air inlet box, there is an air inlet baffle with one end tightly attached to the filter, and an inner air inlet baffle fixedly connected to the air inlet baffle. The air inlet baffle divides the air inlet section into a first heat exchange air passage and a second heat exchange air passage. The first internal circulation air inlet is connected to the first heat exchange air passage, and the second internal circulation air inlet is connected to the second heat exchange air passage. The inner air inlet baffle separates the second heat exchange air passage. The system consists of a left air intake and a right air intake. A first damper and a second damper are rotatably installed in the left and right air intakes, respectively, and a third damper is rotatably installed in the first heat exchange air duct. The first, second, and third dampers are all connected to a damper drive mechanism and rotate under the control of the damper drive mechanism to adjust the opening and closing angle of the dampers. A guide tube is provided in the air guide end of the air intake box. One end of the guide tube abuts against the filter and corresponds to the first or second heat exchange air duct, while the other end extends into the volute. An inner guide air duct and an outer guide air duct are formed on the inner and outer sides of the guide tube, respectively.

2. The centrally located dual-layer automotive air conditioning unit according to claim 1, characterized in that, The widths of the first and second internal circulation air inlets are the same as the width of the air inlet box; the internal air inlet baffle is arranged vertically so that the air intake ratio of the first heat exchange air passage is 50%.

3. The centrally located dual-layer automotive air conditioning unit according to claim 1 or 2, characterized in that, The air intake baffle is integrally formed with the air intake box and is arranged along the air flow direction of the air intake section, so that the air intake ratio of the first heat exchange air passage and the second heat exchange air passage is 50%.

4. The centrally located dual-layer automotive air conditioning unit according to claim 3, characterized in that, The diameter of the guide tube gradually increases from the middle to both ends and corresponds to the first heat exchange air passage.

5. The centrally located dual-layer automotive air conditioning unit according to claim 1, 2, or 4, characterized in that, The air inlet box is provided with a rectangular annular groove that fits tightly with the filter. One end of the guide tube is bent outward to form an outer edge, which is then fixedly connected to the air inlet box after being inserted into the rectangular annular groove.

6. The centrally located dual-layer automotive air conditioning unit according to claim 5, characterized in that, Both the first and second internal circulation air inlets are equipped with grilles that are integrally formed with the air inlet box.

7. An air conditioning system, characterized in that, The air conditioning system includes a centrally located dual-layer automotive air conditioning unit as described in any one of claims 1-6.

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