A heating and cooling door structure for an automobile HVAC assembly

Abstract

A kind of cold and warm air door structure for automobile HVAC assembly, including air outlet shell, main shell, blower and warm air core are fixedly installed in main shell, two cold and warm air door baffles are arranged in warm air core side face, two ends are fixed on main shell, cold and warm air door is arranged between two cold and warm air door baffles, cold and warm air door is fixed on main shell, can rotate around axis, is driven by drive system.The utility model discloses by adding the cold and warm air door of accurate adjustment, realize the efficient mixing of cold and hot air according to proportion, to significantly improve the control precision and comfort of temperature in vehicle, while reducing system energy consumption.

Description

Technical Field

[0001] This utility model relates to automotive air conditioning, and specifically to air dampers. Background Technology

[0002] In existing automotive air conditioning systems, the heating function is commonly achieved by regulating the flow of engine coolant into the heater core via a water valve to control the heating output. In this system design, all air entering the passenger compartment must pass through the heater core. The advantage of this structure is its relative simplicity and low cost. However, it has significant technical shortcomings: 1. Poor linearity of temperature regulation: Due to the lack of an effective mechanism for mixing and regulating hot and cold air, the system is unable to achieve precise and linear temperature control, especially when rapid adjustment is required or when the temperature is in the middle range, resulting in a poor user experience.

[0003] 2. Response lag: Temperature regulation relies entirely on the water valve's control of coolant flow and the thermal inertia of the heater core, resulting in a slow system response speed that cannot quickly meet the occupants' needs for temperature changes.

[0004] 3. High energy consumption: When a non-maximum heating mode is required, the system may need to over-cool the air before mixing and cooling it through the warm air core. This process wastes energy and has low energy efficiency.

[0005] Therefore, in order to address the shortcomings of the water valve-controlled HVAC system mentioned above, there is an urgent need for an innovative damper structure. Summary of the Invention

[0006] The purpose of this invention is to provide a new heating and cooling damper structure for automotive HVAC assemblies. This structure aims to overcome the shortcomings of traditional HVAC systems that rely solely on water valves to regulate heating in terms of temperature control linearity, response speed, and energy efficiency. By adding a precisely adjustable heating and cooling damper, it achieves efficient mixing of hot and cold air in proportion, thereby significantly improving the control accuracy and comfort of the vehicle interior temperature while reducing system energy consumption.

[0007] To achieve the above objectives, the present invention adopts the following technical solution: A heating and cooling damper structure for an automotive HVAC assembly includes an air outlet housing and a main housing. A blower and a heating core are fixedly installed inside the main housing. The structure is characterized in that: two heating and cooling damper baffles are provided on the side of the heating core, with both ends fixed to the main housing. A heating and cooling damper is provided between the two heating and cooling damper baffles. The heating and cooling damper is fixed to the main housing and can rotate around an axis, driven by a drive system.

[0008] The drive system includes a heating / cooling actuator, a heating / cooling drive gear, and a heating / cooling driven gear. The heating / cooling actuator is fixed to the main housing by a heating / cooling actuator mounting plate. The output shaft of the heating / cooling actuator is connected to the heating / cooling drive gear. The heating / cooling drive gear meshes with the heating / cooling driven gear, and the heating / cooling driven gear engages with the shaft hole of the heating / cooling damper.

[0009] The beneficial effects of this utility model are as follows: 1. Improved temperature control precision and comfort: The air inlet side of the heater core is equipped with a double-baffle damper assembly. By steplessly adjusting the mixing ratio of hot and cold air through the hot and cold dampers, more precise and linear control of the outlet air temperature is achieved, overcoming the roughness of simple water valve adjustment and significantly improving driving and riding comfort; 2. Improved system energy efficiency: It avoids the energy waste process of supercooling and then heating in order to obtain an intermediate temperature, making energy use more rational and helping to reduce vehicle energy consumption; 3. Improved system responsiveness: The damper responds to airflow regulation faster than the water valve responds to liquid flow regulation, enabling the system to respond more quickly to temperature changes. 4. Compact structure and easy integration: This hot and cold air damper structure can be directly integrated into the existing HVAC assembly controlled by water valves without major modifications to the basic heat exchange and piping system. It is easy to implement and conducive to application and promotion on existing vehicle platforms. Attached Figure Description

[0010] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is a diagram showing the working state of this utility model. Detailed Implementation

[0011] The specific embodiments of this utility model are further described below with reference to the accompanying drawings: See appendix Figure 1-2 This utility model includes an air outlet housing 4 and a main housing 2, in which a blower 1 and a warm air core 3 are fixedly installed. On the side of the warm air core 3, a first cold and warm air damper 5 and a second cold and warm air damper 7 are provided. The first cold and warm air damper 5 and the second cold and warm air damper 7 are connected and fixed to the main housing 2 by screws. A cold and warm air damper 6 is installed between the first cold and warm air damper 5 and the second cold and warm air damper 7 and is fixed to the main housing 2 by screws. The cold and warm air damper 6 can rotate around an axis.

[0012] The drive system includes a heating / cooling actuator 11, which is fixed to the main housing 2 via a heating / cooling actuator mounting plate 10. The output shaft of the heating / cooling actuator 11 is connected to a heating / cooling drive gear 9, which meshes with a heating / cooling driven gear 8. The driven gear 8 engages with the shaft hole of the heating / cooling damper 6. When the heating / cooling actuator 11 receives a control signal, the drive gear system rotates, thereby precisely controlling the rotation angle of the heating / cooling damper 6.

[0013] Full Heat Mode: When maximum heating is required, the heating / cooling actuator 11 drives the heating / cooling damper 6 to rotate to the position that completely closes the passage to the cold air. At this time, all the air entering from the assembly air inlet 12 flows through the heating core 3 and is heated, and then blown out from the assembly air outlet 13 to achieve full heat output.

[0014] Mixed Mode: When temperature adjustment is required, the heating / cooling actuator 11 drives the air damper 6 to rotate to a certain intermediate angle. At this time, the incoming air is divided into two parts: one part flows through the heating core 3 and is heated to become hot air; the other part passes through the channel formed by the opening of the damper, bypassing the heating core 3 to become cold air. These two airflows mix in the air outlet housing 4 and are then blown out from the assembly air outlet 13. By precisely controlling the opening of the damper, the volume of hot and cold air can be adjusted proportionally to obtain the desired outlet temperature.

[0015] Full Cool Mode: When a lower temperature or natural ventilation is needed, the damper can be rotated to almost fully open the cold air passage while completely closing the warm air water valve. In this mode, some air bypasses the warm air core and is blown out directly.

[0016] When the heating / cooling actuator is working, it drives the heating / cooling damper to rotate via a gear transmission system. This changes the ratio of the opening area of ​​the hot air passage through the heating core to the opening area of ​​the cold air passage bypassing the heating core, thus achieving precise regulation of the outlet air temperature. The gear transmission system mainly consists of meshing heating / cooling drive gears and heating / cooling driven gears. The heating / cooling actuator is fixed to the actuator mounting plate, and its output shaft is connected to the drive gear, thereby transmitting power to the entire transmission system. The edges of the heating / cooling damper are preferably coated with TPE or other elastomer sealing strips using a secondary injection molding process to enhance the sealing effect. The damper body can be designed with reinforcing ribs, such as a star-shaped rib, to improve structural strength and stability.

Claims

1. A heating and cooling damper structure for an automotive HVAC assembly, comprising an air outlet housing and a main housing, wherein a blower and a heating core are fixedly installed inside the main housing, characterized in that: Two hot and cold air damper baffles are set on the side of the heating core, with both ends fixed to the main housing. A hot and cold air damper is set between the two hot and cold air damper baffles. The hot and cold air damper is fixed to the main housing and can rotate around the axis, driven by the drive system.

2. The heating and cooling damper structure for an automotive HVAC assembly according to claim 1, characterized in that: The drive system includes a heating / cooling actuator, a heating / cooling drive gear, and a heating / cooling driven gear. The heating / cooling actuator is fixed to the main housing by a heating / cooling actuator mounting plate. The output shaft of the heating / cooling actuator is connected to the heating / cooling drive gear. The heating / cooling drive gear meshes with the heating / cooling driven gear, and the heating / cooling driven gear engages with the shaft hole of the heating / cooling damper.

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