Cam disc for dual foot mode of automobile air conditioner

Abstract

The utility model belongs to the field of automobile air conditioner, and relates to a double foot blowing mode cam disc of automobile air conditioner, is equipped with respectively for adjusting the face blowing track groove, foot blowing track groove and defrosting track groove of face blowing door, foot blowing door and defrosting door opening degree on the cam disc, the face blowing track groove, foot blowing track groove and defrosting track groove all are equipped with a plurality of door mode control points, and each door mode control point realizes face blowing mode, face blowing foot blowing mode, first foot blowing mode, second foot blowing mode, foot blowing defrosting mode and defrosting mode in proper order, wherein when the face blowing door, foot blowing door and defrosting door are in the first foot blowing mode, the foot blowing door opens, the face blowing door closes, and the defrosting door closes, and when the face blowing door, foot blowing door and defrosting door are in the second foot blowing mode, the foot blowing door opens, the face blowing door closes, and the defrosting door opens.

Description

Technical Field

[0001] This utility model belongs to the field of automotive air conditioning and relates to a dual-blow mode cam plate for automotive air conditioning. Background Technology

[0002] Automotive air conditioning systems come in three types: offset, center-mounted, and split-type. Air conditioning is a crucial component of a car, primarily consisting of an air intake unit, a blower unit, and a distribution unit. The air intake unit draws in air from inside or outside the vehicle. This air is then transported to the distribution unit via the blower unit. The distribution unit contains temperature dampers, defrost dampers, face dampers, foot dampers, and a heater core. All dampers are mounted inside the distribution unit, with one end of the damper shaft connected to a rocker arm, which in turn is connected to a mode cam. Users can adjust the temperature damper to provide cold or hot air, and adjust the mode cam to select from face / foot / foot / foot (with the defrost damper partially open), foot / defrost, or regular defrost modes. Cold air improves the air quality and lowers the interior temperature, while hot air quickly defrosts and defogs the car, providing a comfortable driving environment, reducing fatigue, and improving driving safety. However, the traditional foot-blowing mode of car air conditioning is not suitable for use in summer. According to market research and user feedback, using the foot-blowing mode to blow cold air in summer will cause the front windshield to fog up, which not only affects the performance of the air conditioning unit but also affects the safety and comfort of the driver and passengers.

[0003] like Figure 1 The diagram shows the structure of a traditional automotive air conditioning cam disc, which consists of a surface blowing trajectory, a foot blowing trajectory, and a defrosting trajectory. Figure 2 As shown, each trajectory corresponds to the same five mode control points: blowing face mode 1, blowing face and feet mode 2, blowing feet mode 3 (defrosting damper is open), blowing feet and defrosting mode 4, and defrosting mode 5; as shown... Figure 3 and Figure 4 The diagram shows the status of the foot air damper 8, face air damper 7, and defrost air damper 6 in the foot air blowing mode of a traditional car air conditioner. It can be seen that in the foot air blowing mode, the foot air damper 8 is fully open, the face air damper 7 is closed, but the defrost air damper 6 has a certain degree of opening.

[0004] In summary, the traditional automotive air conditioning system's control logic allows for free switching between modes by adjusting the cam plate according to user needs. However, in hot summers, when using the full-cold foot-blowing mode (foot-blowing mode 3), the cold air passes through the defrost damper and blows onto the windshield, causing fogging. This not only affects the driver's and passengers' visibility but also seriously impacts safety and comfort. Therefore, there is an urgent need to develop a new cam plate for automotive air conditioning systems to solve the technical problem of windshield fogging when using the full-cold foot-blowing mode in hot summers. Utility Model Content

[0005] In view of this, the purpose of this utility model is to provide a dual-blow mode cam plate for automotive air conditioning to solve the technical problem of windshield fogging when using the full cold blow mode of automotive air conditioning in hot summer.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] A dual-blower-foot-mode cam disk for an automotive air conditioner, the cam disk having blower trajectory grooves for adjusting the opening of the blower damper, the foot-blower damper, and the defrost damper, respectively. Each blower trajectory groove, foot-blower trajectory groove, and defrost trajectory groove has several damper mode control points, and each damper mode control point sequentially realizes the blower mode, blower-foot-blower mode, first foot-blower mode, second foot-blower mode, foot-blower-defrost mode, and defrost mode.

[0008] When the face blowing damper, foot blowing damper, and defrosting damper are in the first foot blowing mode, the foot blowing damper is open, the face blowing damper is closed, and the defrosting damper is closed.

[0009] When the face blowing damper, foot blowing damper, and defrost damper are in the second foot blowing mode, the foot blowing damper is open, the face blowing damper is closed, and the defrost damper is open.

[0010] Furthermore, the blowing trajectory groove, the blowing foot trajectory groove, and the defrosting trajectory groove are integrated with the cam disk.

[0011] Furthermore, a rotating shaft is provided on the cam disk to drive the cam disk to rotate.

[0012] Furthermore, the cam disc body is also provided with several reinforcing ribs that are connected to the rotating shaft.

[0013] Furthermore, the blowing surface track groove, the blowing foot track groove, and the defrosting track groove are all arc-shaped as a whole.

[0014] Furthermore, the bottom of the blowing surface track groove, the blowing foot track groove, and the defrosting track groove all have multiple through-holes, and the through-holes correspond to the positions of the mode control points of each damper, serving as observation holes.

[0015] Furthermore, the blowing trajectory groove is arranged at the edge of the cam disk, and the blowing foot trajectory groove is arranged between the blowing trajectory groove and the defrosting trajectory groove.

[0016] The beneficial effects of this utility model are as follows:

[0017] This utility model's dual-foot-blowing mode cam disc effectively solves the technical problem of windshield fogging when using the foot-blowing mode for cold air in hot summer by adding a first foot-blowing mode (foot-blowing damper open, face-blowing damper and defrost damper closed) to the traditional automotive air conditioning cam disc, and retaining a second foot-blowing mode (foot-blowing damper open, defrost damper partially open) for hot air in winter. The core of this design lies in the optimization of the cam disc's trajectory grooves: the face-blowing trajectory groove, foot-blowing trajectory groove, and defrost trajectory groove are integrally formed, with multiple mode control points and observation holes, facilitating precise adjustment of the damper opening and ensuring that the damper status adapts to the heating and cooling needs of different seasons.

[0018] First, it eliminates the risk of fogging in summer, improving the safety of drivers and passengers. For example, in hot and humid environments, cool air blows only from the feet, preventing cold, damp air from contacting the glass and causing blurred vision. Second, it has a simple structure and low cost, requiring only the addition of a mode point to the existing cam plate, without the need for additional components. It is suitable for offset, center-mounted, and split-type air conditioners, as well as single-layer, double-layer, single-temperature zone, or multi-temperature zone systems, offering wide applicability and strong practicality. Third, it meets diverse user needs, such as comfortable cooling in summer and anti-frost and defogging in winter, improving overall comfort. Finally, through precise mode switching, it reduces energy consumption caused by unnecessary vent opening, improving air conditioning efficiency. This solution does not change the traditional design foundation but significantly optimizes air conditioning performance, ensuring greater reliability, safety, and comfort for users.

[0019] Other advantages, objectives, and features of this invention will be set forth in part in the description which follows, and in part will be apparent to those skilled in the art from the following examination and study, or may be learned from practice of this invention. The objectives and other advantages of this invention can be realized and obtained through the following description. Attached Figure Description

[0020] To make the objectives, technical solutions, and advantages of this utility model clearer, the preferred embodiments of this utility model will be described in detail below with reference to the accompanying drawings, wherein:

[0021] Figure 1 A schematic diagram of the cam disc trajectory in a traditional automotive air conditioning mode;

[0022] Figure 2 A schematic diagram showing the positions of the cam disc in various modes of a traditional automotive air conditioning system;

[0023] Figure 3 A schematic diagram showing the opening of the foot-blowing and defrosting dampers in the traditional car air conditioning foot-blowing mode;

[0024] Figure 4 A schematic diagram showing the opening of the defrost damper in the traditional foot-blowing mode of a car air conditioner;

[0025] Figure 5 This is a schematic diagram of the trajectory of the cam disc in the dual-blow mode of an automotive air conditioner in Example 1.

[0026] Figure 6 This is a schematic diagram showing the positions of the cam disc in the dual-blow mode of an automotive air conditioner in Example 1.

[0027] Figure 7 This is a schematic diagram of the first blowing mode (for full cooling) of the dual-blowing mode cam plate of an automotive air conditioner in Example 1;

[0028] Figure 8 This is a schematic diagram of the second foot blowing mode (for full heating) of the dual foot blowing mode cam plate of an automotive air conditioner in Example 1.

[0029] Attached label: 1-Face blowing mode, 2-Face and foot blowing mode, 3-Foot blowing mode, 4-Foot blowing and defrosting mode, 5-Defrosting mode, 6-Defrosting damper, 7-Face blowing damper, 8-Foot blowing damper, 9-Shaft, 10-Reinforcing rib;

[0030] a-Face blowing mode A, b-Face and foot blowing mode A, c-First foot blowing mode A, d-Second foot blowing mode A, e-Foot blowing and defrosting mode A, f-Defrosting mode A; Detailed Implementation

[0031] The following specific examples illustrate the implementation of this utility model. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification. This utility model can also be implemented or applied through other different specific embodiments, and various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of this utility model. It should be noted that the illustrations provided in the following embodiments are only schematic representations of the basic concept of this utility model. Unless otherwise specified, the following embodiments and features can be combined with each other.

[0032] The accompanying drawings are for illustrative purposes only and are schematic diagrams, not actual pictures. They should not be construed as limiting the present invention. To better illustrate the embodiments of the present invention, some parts in the drawings may be omitted, enlarged, or reduced, and do not represent the actual product dimensions. It is understandable to those skilled in the art that some well-known structures and their descriptions may be omitted in the drawings.

[0033] In the accompanying drawings of this utility model, the same or similar reference numerals correspond to the same or similar components. In the description of this utility model, it should be understood that if terms such as "upper," "lower," "left," "right," "front," and "rear" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, 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, the terms used to describe positional relationships in the drawings are only for illustrative purposes and should not be construed as limiting this utility model. For those skilled in the art, the specific meaning of the above terms can be understood according to the specific circumstances.

[0034] This utility model relates to a dual-blower-foot-mode cam disc for automotive air conditioning. It adds a dedicated foot-blowing mode (first foot-blowing mode) to a traditional cam disc, solving the problem of windshield fogging during summer cold air blowing. The cam disc is generally disc-shaped and can be integrally injection molded from heat-resistant plastic (such as polycarbonate). The cam disc has surface-blowing, foot-blowing, and defrosting grooves, arranged in an arc shape to accommodate the sliding of the damper shaft. Each groove has multiple through-holes at its bottom for observation, with the width of these holes smaller than the width of the damper shaft. These observation holes correspond to control points for each mode, facilitating assembly and adjustment. A rotating shaft 9 is located at the center of the cam disc, used to connect a stepper motor for rotation, corresponding to different modes. The cam disc can be applied to offset, center-mounted, and split-type air conditioners, as well as single-layer, double-layer, single-temperature zone, or multi-temperature zone systems.

[0035] Example 1

[0036] Please see Figures 5-8 In this embodiment, the dual-blower-foot-mode cam disc for automotive air conditioning is applied to a single-zone offset air conditioning system. The cam disc is integrally formed with the surface-blowing trajectory groove, the foot-blowing trajectory groove, and the defrosting trajectory groove. The surface-blowing trajectory groove is located at the outermost edge of the cam disc, the foot-blowing trajectory groove is located in the middle, and the defrosting trajectory groove is located on the side furthest from the surface-blowing trajectory groove. Each trajectory groove has six damper mode control points, corresponding sequentially to surface-blowing mode Aa, surface-blowing-foot-blowing mode Ab, first foot-blowing mode Ac (for blowing cold air in summer), second foot-blowing mode Ad (for blowing hot air in winter), foot-blowing-defrosting mode Ae, and defrosting mode Af. These control points achieve precise adjustment of the damper opening through changes in the curvature of the trajectory grooves.

[0037] The specific working process is as follows: The cam disc is driven to rotate by a motor via the rotating shaft 9. When it rotates to the blowing mode Aa (corresponding to the attached...), it... Figure 6When rotating to position a), the face-blowing trajectory groove controls the face-blowing damper 7 to open (100% opening), the foot-blowing trajectory groove controls the foot-blowing damper 8 to close (0% opening), and the defrost trajectory groove controls the defrost damper 6 to close (0% opening), with air mainly blowing towards the face. Continuing to rotate to the face-blowing and foot-blowing mode Ab (position b), the face-blowing damper 7 partially opens (50% opening, the specific opening can be adjusted according to design needs), the foot-blowing damper 8 partially opens (50% opening, the specific opening can be adjusted according to design needs), and the defrost damper 6 closes, achieving mixed airflow to the face and feet.

[0038] When rotated to the first blow mode Ac(c) position, the corresponding attachment... Figure 7 This is a mode specifically designed for full-cool airflow in summer: the foot-blowing trajectory groove allows the foot-blowing damper 8 to be fully open (100% opening, the opening of the foot-blowing damper 8 is as follows). Figure 7 As shown in g), the blowing trajectory groove closes the blowing damper 7 (opening degree 0%), and the defrosting trajectory groove fully closes the defrosting damper 6 (opening degree 0%). The opening degree of the foot blowing damper 8 is as shown in g). Figure 7 (As shown in h in the diagram). At this time, the cold air only blows out from the foot vent, avoiding the cold air from contacting the windshield and causing fogging, thus improving comfort and safety in summer.

[0039] Further rotate to the second blow mode, position Ad(d), corresponding to the attached... Figure 8 Suitable for full hot air in winter: The foot-blowing trajectory groove allows the foot-blowing damper 8 to be fully open (opening degree 100%), the opening degree of the foot-blowing damper 8 is as follows: Figure 8 As shown in j), the face blowing damper 7 is closed (0% opening), and the defrosting track groove causes the defrosting damper 6 to partially open (30% opening; the specific opening can be adjusted according to design requirements; the opening of the foot blowing damper 8 is as shown in j). Figure 8 (As shown in k in the diagram). Hot air is blown out from the feet, while a small amount of hot air is blown forward through the defrost damper 6 to prevent frost or fogging, thus meeting winter needs.

[0040] Continue to the foot blowing defrost mode Ae (position e). Foot blowing damper 8 is partially open (70% opening, the specific opening can be adjusted according to design needs), defrost damper 6 is partially open (50% opening, the specific opening can be adjusted according to design needs), and face blowing damper 7 is closed. Finally, switch to defrost mode Af (position f). Defrost damper 6 is fully open (100% opening), and all other dampers are closed, focusing on defrosting.

[0041] In this embodiment, the observation hole is located below each mode control point, facilitating visual or tool confirmation of the damper position during installation. This structure is simple, adding only one mode point to the traditional cam plate, requiring no additional components, and increasing cost by less than 5%. Tests show that in summer, at an ambient temperature of 35°C and humidity of 80%, using the first foot-blowing mode to blow cold air prevents fogging of the windshield; in winter, at -5°C, the second foot-blowing mode effectively prevents frost formation on the glass, improving air conditioning efficiency and energy utilization.

[0042] Example 2

[0043] In this embodiment, based on Embodiment 1, 4-6 reinforcing ribs 10 are provided around the rotating shaft 9 to enhance structural strength. Furthermore, the widths of the blowing surface track groove, the blowing foot track groove, and the defrosting track groove are all different to prevent errors.

[0044] Through the above embodiments, the cam disc of this utility model has a simple structure, strong practicality, can be widely adapted to various types of air conditioners, and significantly improves the user experience.

[0045] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solution of this utility model without departing from the spirit and scope of this technical solution, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A dual-blower mode cam plate for an automotive air conditioner, characterized in that: The cam disk is provided with a blowing track groove, a foot blowing track groove, and a defrosting track groove for adjusting the opening of the blowing air damper, the foot blowing air damper, and the defrosting air damper, respectively. Each of the blowing track groove, foot blowing track groove, and defrosting track groove is provided with several air damper mode control points. Each air damper mode control point sequentially realizes the blowing mode, blowing and foot blowing mode, first foot blowing mode, second foot blowing mode, foot blowing and defrosting mode, and defrosting mode. When the face blowing damper, foot blowing damper, and defrosting damper are in the first foot blowing mode, the foot blowing damper is open, the face blowing damper is closed, and the defrosting damper is closed. When the face blowing damper, foot blowing damper, and defrost damper are in the second foot blowing mode, the foot blowing damper is open, the face blowing damper is closed, and the defrost damper is open.

2. The dual-blow mode cam plate of the automotive air conditioner according to claim 1, characterized in that: The blowing surface track groove, the blowing foot track groove, and the defrosting track groove are integrated with the cam disc.

3. The dual-blow mode cam plate of the automotive air conditioner according to claim 1, characterized in that: A rotating shaft is provided on the cam disk to drive the cam disk to rotate.

4. The dual-blow mode cam plate of the automotive air conditioner according to claim 3, characterized in that: The cam disc body is also provided with several reinforcing ribs that are connected to the rotating shaft.

5. The dual-blow mode cam plate of the automotive air conditioner according to claim 1, characterized in that: The blowing surface track groove, the blowing foot track groove, and the defrosting track groove are all arc-shaped as a whole.

6. The dual-blow mode cam plate of the automotive air conditioner according to claim 1, characterized in that: The bottom of the blowing surface track groove, the blowing foot track groove, and the defrosting track groove all have multiple through-holes, and the through-holes correspond to the positions of the mode control points of each damper, serving as observation holes.

7. The dual-blow mode cam plate of the automotive air conditioner according to claim 1, characterized in that: The blowing surface track groove is arranged at the edge of the cam disk, and the blowing foot track groove is arranged between the blowing surface track groove and the defrosting track groove.

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