Low-noise automobile air conditioner

Abstract

The utility model belongs to the technical field of automobile air conditioners, and relates to a low-noise automobile air conditioner which comprises an air blower and a distribution box assembly, an air inlet flow channel communicated with the air blower and the distribution box assembly is arranged in a volute of the air blower, a resonant cavity is arranged on the air inlet flow channel, and the resonant cavity is located at the end, close to a volute tongue, of an air inlet diffusion section of the air inlet flow channel. The fan is arranged on one side of the air blower; a through hole is formed in the resonant cavity, and the air inlet flow channel is communicated with an inner cavity of the resonant cavity through the through hole; vibration energy of airflow in the air inlet flow channel is transmitted to air in the resonant cavity through the through holes, resonance is generated, the amplitude of the airflow in the air inlet flow channel is reduced, and therefore noise is reduced, the problem that the noise of the air handling unit is large is solved, and comfort of a driver and passengers is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of automotive air conditioners, and relates to a low-noise automotive air conditioner. Background Art

[0002] With the rapid development of the automotive industry, automobiles have become an indispensable part of people's daily lives. In modern society, the comprehensive popularity and diverse demands for automobiles are increasing day by day. Among them, the comfort and energy-saving efficiency of automobiles are particularly concerned by consumers. Among many automotive accessories, as an important part to enhance the riding experience, the performance optimization of the air conditioning system has become the focus of research and development.

[0003] Traditional automotive air conditioning systems are mainly divided into two types: offset type and center-mounted type. As Figure 1 shown, the air conditioning box usually consists of the following main parts:

[0004] Blower: responsible for sucking external air into the air conditioning system and distributing it to various areas inside the vehicle through the air duct.

[0005] Volute: the outer shell of the blower, and the inner part of the volute is an air flow channel for guiding the air flow.

[0006] Distribution box assembly: distributes cold and warm air to different air outlets to meet the needs of different areas inside the vehicle.

[0007] However, with the continuous progress of new energy technologies, silent air conditioning systems have gradually become a new trend in the market. Nevertheless, there are still huge challenges in reducing the noise generated during the operation of the air conditioner. When the existing air conditioning box is in use, it is easy to generate abnormal sounds that make the passengers and drivers feel uncomfortable, which has a greater impact on the vehicle's NVH and results in insufficient comfort in the vehicle. Content of the Utility Model

[0008] In view of this, the purpose of the utility model is to solve the problems of high noise and poor sound quality of the existing air conditioning box, and provide a low-noise automotive air conditioner.

[0009] To achieve the above purpose, the utility model provides the following technical solutions:

[0010] A low-noise automotive air conditioner includes a blower and a distribution box assembly. An air inlet flow channel connecting the blower and the distribution box assembly is provided inside the volute of the blower. A resonance cavity is provided on the air inlet flow channel. The resonance cavity is located at one end of the air inlet diffuser section of the air inlet flow channel close to the volute tongue and on the side far from the center of the blower. A through hole is opened on the resonance cavity, and the air inlet flow channel is communicated with the inner cavity of the resonance cavity through the through hole. The vibration energy of the air flow in the air inlet flow channel is transmitted to the air in the resonance cavity through the through hole and generates resonance, reducing the amplitude of the air flow in the air inlet flow channel.

[0011] Furthermore, the resonant cavity is fixedly connected to the volute or the distribution box assembly.

[0012] Furthermore, the inner cavity volume of the resonant cavity is 50 - 1000 ml, and the diameter of the through hole on the resonant cavity is 3 - 12 mm.

[0013] The beneficial effects of the present utility model are as follows:

[0014] By setting the resonant cavity in the present utility model, during the airflow flowing process in the air inlet flow channel, the air pressure will fluctuate at the through hole of the resonant cavity, squeezing the air inside the cavity. Pressure fluctuations occur in the air inside the resonant cavity, and the air medium vibrates. This vibration frequency is not very high and is easily resonant with the low-frequency pneumatic noise of the outside airflow. During resonance, the amplitude inside the cavity increases, and the airflow amplitude in the air inlet flow channel decreases. Therefore, this resonance will negatively weaken the vibration energy of the airflow in the air inlet flow channel at this frequency band, thereby reducing noise. It better solves the problems of high noise and booming in the air conditioning box and improves the comfort of the passengers.

[0015] Other advantages, objectives, and features of the present utility model will be elaborated to some extent in the subsequent description, and to some extent, will be obvious to those skilled in the art based on the study of the following text, or can be taught from the practice of the present utility model. The objectives and other advantages of the present utility model can be achieved and obtained through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to make the objectives, technical solutions, and advantages of the present utility model clearer, the present utility model will be described in detail preferably with reference to the accompanying drawings, where:

[0017] Figure 1 is a schematic diagram of the existing automotive air conditioning structure.

[0018] Figure 2 is a schematic diagram of the automotive air conditioning structure in the present utility model.

[0019] Figure 3 is a schematic diagram of the installation position of the resonant cavity.

[0020] Figure 4 、 5 is a schematic diagram of the structure of the resonant cavity.

[0021] Reference numerals: 1 - blower; 2 - distribution box assembly; 3 - airflow channel; 4 - resonant cavity; 5 - through hole. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0022] The following describes the implementation modes of the present utility model through specific examples. Those skilled in the art can easily understand the other advantages and effects of the present utility model from the content disclosed in this specification. The present utility model can also be implemented or applied through other different specific implementation modes. Various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of the present utility model. It should be noted that the drawings provided in the following embodiments only illustrate the basic concept of the present utility model in a schematic manner. Without conflict, the following embodiments and the features in the embodiments can be combined with each other.

[0023] Among them, the drawings are only for illustrative purposes, showing only schematic diagrams rather than actual diagrams, and should not be construed as a limitation to the present utility model; in order to better illustrate the embodiments of the present utility model, some components in the drawings will be omitted, enlarged or reduced, which does not represent the dimensions of the actual product; for those skilled in the art, it is understandable that some well-known structures and their descriptions in the drawings may be omitted.

[0024] In the drawings of the embodiments of the present utility model, the same or similar reference numerals correspond to the same or similar components; in the description of the present utility model, it should be understood that if there are terms such as "upper", "lower", "left", "right", "front", "rear", etc. indicating the orientation or positional relationship, they are based on the orientation or positional relationship shown in the drawings. This is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, the terms describing the positional relationship in the drawings are only for illustrative purposes and should not be construed as a limitation to the present utility model. For those of ordinary skill in the art, the specific meanings of the above terms can be understood according to specific circumstances.

[0025] Please refer to Figures 2 to 5 , which is a low-noise automotive air conditioner, including a blower 1 and a distribution box assembly 2. An air inlet flow channel communicating the blower 1 and the distribution box assembly 2 is arranged in the volute of the blower 1. The outlet of the air inlet flow channel faces the subcooler of the distribution box assembly 2, and an evaporator is behind the filter. A resonance cavity 4 is installed in the air inlet flow channel. The resonance cavity 4 is located at one end of the air inlet diffuser section of the air inlet flow channel near the volute tongue and on the side far from the center of the blower 1; a through hole 5 is opened on the resonance cavity 4, and the air inlet flow channel is communicated with the inner cavity of the resonance cavity 4 through the through hole 5; the vibration energy of the air flow in the air inlet flow channel is transmitted to the air in the resonance cavity 4 through the through hole 5 and generates resonance. During resonance, the amplitude in the cavity increases, and the amplitude of the air flow in the air inlet flow channel decreases, thereby reducing noise.

[0026] In this embodiment, the resonant cavity 4 is fixedly installed on the distribution box assembly 2 and communicated with the air flow channel 3 through the protruding through hole 5. The inner cavity volume of the resonant cavity 4 can be selected within the range of 50000 ml according to needs, and the diameter of the through hole 5 on the resonant cavity 4 can be selected within the range of 312 mm.

[0027] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit them. Although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the present invention can be modified or equivalently replaced without departing from the spirit and scope of the present technical solution, and they should all be covered within the scope of the claims of the present invention.

Claims

1. A low-noise automobile air conditioner, comprising a blower and a distribution box assembly, wherein an air inlet passage connecting the blower and the distribution box assembly is provided in the volute of the blower, characterized in that: A resonance cavity is provided on the air inlet flow channel, and the resonance cavity is located at one end of the air inlet diffusion section of the air inlet flow channel close to the volute tongue and away from the center of the blower; a through hole is opened on the resonance cavity, and the air inlet flow channel is connected with the inner cavity of the resonance cavity through the through hole; the vibration energy of the airflow in the air inlet flow channel is transmitted to the air in the resonance cavity through the through hole, and resonance is generated, thereby reducing the amplitude of the airflow in the air inlet flow channel.

2. The low-noise automobile air conditioner according to claim 1, characterized in that: The resonance cavity is fixedly connected to the volute or the distribution box assembly.

3. The low-noise automobile air conditioner according to claim 2, characterized in that: The inner cavity volume of the resonant cavity is 50-1000 ml, and the diameter of the through hole on the resonant cavity is 3-12 mm.

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