A structure for preventing air circulation between inside and outside of an air inlet of an air conditioning box

Abstract

This utility model discloses a structure for preventing air leakage between the internal and external air circulation modes in an air conditioning unit, relating to the technical field of air conditioning units. It includes: an air intake housing; an external circulation damper and an internal circulation damper arranged side-by-side within the air intake housing, with an external circulation air inlet at the external circulation damper and an internal circulation air inlet at the internal circulation damper; a partition arranged between the external and internal circulation dampers to divide the air intake housing into independent external and internal circulation ducts; and a guide shroud located below the external circulation damper and sealed to the bottom of the air intake housing, including a guide channel leading to a blower; wherein an internal air intake grille vent is provided on the side of the air intake housing facing away from the internal circulation air inlet, and the internal air intake grille vent opens when the lower side of the internal circulation air inlet is closed and the internal circulation damper is closed. This utility model solves the problem of air leakage between the internal and external circulation dampers in existing automotive air conditioning units during intermediate modes.

Description

Technical Field

[0001] This utility model relates to the field of air conditioning unit technology, and more specifically, it relates to a structure for preventing air leakage between the internal and external air circulation of an air conditioning unit. Background Technology

[0002] In automotive air conditioning systems, the air conditioning unit regulates the vehicle's temperature and controls air quality by switching between internal and external recirculation modes. In existing technologies, the air conditioning unit often experiences airflow leakage between the internal and external recirculation modes. Specifically, in external recirculation mode, insufficient external air intake affects ventilation efficiency; in internal recirculation mode, external air still seeps in through the vent gaps, leading to decreased temperature control accuracy and increased cooling / heating energy consumption. Furthermore, at high vehicle speeds, the high-speed airflow impacting the vents can also cause airflow leakage between the internal and external recirculation modes.

[0003] Existing solutions often improve sealing by optimizing the rigidity of damper materials or improving the drive mechanism. However, due to limitations in structural layout and complex airflow pressure changes under dynamic operating conditions, it is still difficult to prevent air leakage at high speeds, resulting in temperature control performance and energy efficiency levels that cannot meet the requirements. Utility Model Content

[0004] To address this problem in practical applications, the purpose of this utility model is to propose a structure for preventing air leakage between the internal and external air circulation systems in an air conditioning unit. The specific solution is as follows:

[0005] A structure for preventing air leakage between internal and external air circulation in an air conditioning unit includes:

[0006] Air inlet housing;

[0007] An external circulation damper and an internal circulation damper are arranged side by side in the air inlet box housing. An external circulation air outlet is provided at the external circulation damper and an internal circulation air outlet is provided at the internal circulation damper.

[0008] A partition is placed between the external circulation damper and the internal circulation damper to separate the air inlet box housing into independent external circulation ducts and internal circulation ducts;

[0009] A flow guide is located on the lower side of the external circulation damper and is sealed to the bottom of the air inlet housing. It includes a flow guide channel leading to the blower.

[0010] The air inlet box housing has an internal air intake grille on the side facing away from the internal circulation air inlet. The internal air intake grille is opened when the lower side of the internal circulation air inlet is closed and the internal circulation damper is closed.

[0011] Furthermore, the air inlet box housing has an arc-shaped plate structure that matches the movement trajectory of the damper.

[0012] Furthermore, the partition is integrally formed with the air inlet box housing.

[0013] Furthermore, the cover panel of the air guide gradually tilts away from the center of the air inlet housing from the edge towards the air guide channel.

[0014] Furthermore, the inner air intake grille vent is connected to the inner circulation duct, and the outer circulation vent is connected to the outer circulation duct.

[0015] Furthermore, the bottom of the air inlet housing is closed below the internal circulation air inlet, and open below the internal air intake grille air inlet, leading to the blower.

[0016] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0017] This invention provides a structure for preventing air leakage between the internal and external air circulation modes in an air conditioning unit, solving the problem of air leakage between the internal and external air circulation dampers in existing automotive air conditioning units during intermediate modes. Attached Figure Description

[0018] Figure 1 This is an overall schematic diagram of an embodiment of the present utility model;

[0019] Figure 2 This is a schematic diagram illustrating the structure of the air conditioning unit of this utility model in external circulation mode;

[0020] Figure 3 This is a schematic diagram illustrating the structure of the air conditioning unit of this utility model in internal circulation mode;

[0021] Figure 4-5 This is a schematic diagram illustrating the structure of the air conditioning unit of this utility model in the intermediate mode.

[0022] Reference numerals: 1. Air inlet housing; 11. Front panel; 12. Back panel; 2. External circulation damper; 3. Internal circulation damper; 4. Partition; 5. External circulation vent; 6. Internal circulation vent; 7. Internal air inlet grille vent; 8. Draft hood; 81. Cover panel; 82. Draft channel. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0024] like Figure 1 As shown, a structure for preventing air leakage between internal and external air circulation in an air conditioning unit includes an air intake housing 1, an external circulation damper 2 and two internal circulation dampers 3 arranged side-by-side within the air intake housing 1, and two partitions 4. The external circulation damper 2 is located between the two internal circulation dampers 3, and an external circulation air outlet 5 is provided at the external circulation damper 2 (see...). Figure 2), and internal circulation air vents 6 are installed at 3 internal circulation dampers (see Figure 2 The partition 4 is disposed inside the air inlet housing 1, and each partition 4 is disposed between adjacent external circulation dampers 2 and internal circulation dampers 3. The partition 4 is used to divide the air inlet housing 1 into an independent external circulation duct and two internal circulation ducts (not shown in the figure). Preferably, the partition 4 is connected to the air inlet housing 1 as an integral structure.

[0025] The side of the air inlet housing 1 facing the external circulation air inlet 5 and the internal circulation air inlet 6 is designated as the front plate 11, and the side facing away from the external circulation air inlet 5 and the internal circulation air inlet 6 is designated as the back plate 12. The front plate 11 and the back plate 12 form an arc-shaped plate structure that matches the movement trajectory of the damper.

[0026] The front panel 11 of the air intake housing 1 is completely enclosed. The back panel 12 on the side of the air intake housing 1 facing away from the two internal circulation air inlets 6 is provided with an internal air intake grille vent 7, which is connected to the internal circulation air duct. When the internal circulation damper 3 is closed, the air inside the vehicle can enter the internal circulation air duct through the internal air intake grille vent 7. The back panel 12 on the side of the air intake housing 1 facing away from the external circulation air inlet 5 is closed.

[0027] The internal circulation vent 6 and the external circulation vent 5 lead to the outside air of the vehicle, while the internal air intake grille vent 7 leads to the inside air of the vehicle.

[0028] Meanwhile, the bottom of the air inlet housing 1 and the lower side of the two internal circulation air inlets 6 are closed, while the bottom of the air inlet housing 1 and the lower side of the two internal air intake grille inlets 7 are open and open to the blower (the blower is not shown in the figure).

[0029] When the internal circulation damper 3 is open, the internal air intake grille vent 7 is closed by the internal circulation damper 3, and the lower side of the internal circulation vent 6 is also closed. At this time, neither the air inside the vehicle nor the air outside the vehicle can enter the air intake housing 1. When the internal circulation damper 3 is closed, the internal air intake grille vent 7 is open. At this time, the air inside the vehicle enters the air intake housing through the internal air intake grille vent 7.

[0030] A deflector 8 is provided on the lower side of a single external circulation vent 5. The deflector 8 is used to guide the outside air entering from the external circulation vent 5 into the external circulation duct and direct it to the blower. Specifically, the deflector 8 is sealed and installed at the bottom of the air inlet housing 1. The deflector 8 consists of a cover panel 81 and a guide channel 82. The cover panel 81 is sealed and connected to the air inlet housing 1, and the guide channel 82 is opened on the cover panel 81 and leads to the blower.

[0031] When the external circulation damper 2 is opened, the outside air enters the external circulation duct through the external circulation vent 5 and is guided to the blower through the guide shroud 8.

[0032] Furthermore, the cover panel 81 gradually tilts away from the center of the air inlet housing 1 from its edge toward the direction of the air guide channel 82.

[0033] Additionally, it should be noted that the external circulation damper 2 and the internal circulation damper 3 are connected to the air inlet housing 1 via damper shafts. Both the external circulation damper 2 and the internal circulation damper 3 are driven by a drive mechanism to open and close the damper shafts. Furthermore, the external circulation damper 2 and the internal circulation damper 3 can be opened and closed independently. The drive mechanism is existing technology and is not an improvement point of this application, so it will not be described in detail here.

[0034] The specific operating conditions of this application include:

[0035] Operating Condition 1: External Circulation Mode

[0036] When the air conditioning unit is in external circulation mode, such as Figure 2 As shown, two internal circulation dampers 3 and one external circulation damper 2 are opened simultaneously. At this time, the internal air intake grille vent 7 is closed by the internal circulation damper 3. The outside air enters the air intake box housing 1 through the external circulation vent 5 and finally enters the blower through the guide shroud 8.

[0037] Operating Condition 2: Internal Circulation Mode

[0038] When the air conditioning unit is in recirculation mode, such as Figure 3 As shown, the two internal circulation dampers 3 and one external circulation damper 2 are closed at the same time, and the air inside the vehicle enters the air intake box housing 1 from the inner air intake grille vent 7, and finally enters the blower.

[0039] Operating Condition 3, Intermediate Mode

[0040] When the air conditioning unit is in the intermediate mode, such as Figure 4-5 As shown, both internal circulation dampers 3 are closed, and the external circulation damper 2 is opened at a certain angle. External air enters the air intake housing 1 through the external circulation vent 5 and the external circulation duct, and then enters the blower through the guide shroud 8. Internal air enters the air intake housing through the internal air intake grille vent 7 and the internal circulation duct, and then enters the blower.

[0041] In this intermediate mode, the air inside the vehicle enters the air intake box through the inner air intake grille vent 7 of the back panel 12 of the air intake box housing 1, while the air outside the vehicle enters the air intake box housing 1 through the external circulation vent 5 at the front panel 11 of the air intake box housing 1. That is, the air inside the vehicle and the air outside the vehicle enter the air intake box housing 1 through different air ducts and then enter the blower. There will be no problem of air leakage between the inside and outside of the air conditioning box, thus achieving the effect of preventing air leakage.

[0042] The above description is merely a preferred embodiment of this utility model. The protection scope of this utility model is not limited to the above embodiments. All technical solutions falling within the scope of this utility model's concept are protected. It should be noted that for those skilled in the art, any improvements and modifications made without departing from the principle of this utility model should also be considered within the protection scope of this utility model.

Claims

1. A structure for preventing air intake internal and external circulation cross air leakage in an air conditioning box, characterized in that, include: Air inlet housing; An external circulation damper and an internal circulation damper are arranged side by side in the air inlet box housing. An external circulation air outlet is provided at the external circulation damper and an internal circulation air outlet is provided at the internal circulation damper. A partition is placed between the external circulation damper and the internal circulation damper to separate the air inlet box housing into independent external circulation ducts and internal circulation ducts; A flow guide is located on the lower side of the external circulation damper and is sealed to the bottom of the air inlet housing. It includes a flow guide channel leading to the blower. The air inlet box housing has an internal air intake grille on the side facing away from the internal circulation air inlet. The internal air intake grille is opened when the lower side of the internal circulation air inlet is closed and the internal circulation damper is closed.

2. The structure for preventing the air intake inside-outside circulation cross air of the air conditioning box according to claim 1, characterized in that, The air inlet box housing has an arc-shaped plate structure that matches the movement trajectory of the damper.

3. The structure for preventing air leakage between internal and external air circulation in an air conditioning unit according to claim 1, characterized in that, The partition is integrally formed with the air inlet box shell.

4. The structure for preventing air leakage between internal and external air circulation in an air conditioning unit according to claim 1, characterized in that, The cover panel of the air guide gradually tilts away from the center of the air inlet housing from the edge towards the air guide channel.

5. The structure for preventing air leakage between internal and external air circulation in an air conditioning unit according to claim 1, characterized in that, The inner air intake grille is connected to the inner circulation duct, and the outer circulation vent is connected to the outer circulation duct.

6. The structure for preventing air leakage between internal and external air circulation in an air conditioning unit according to claim 1, characterized in that, The bottom of the air inlet box housing is closed below the internal circulation air inlet and open below the internal air inlet grille, leading to the blower.

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