A micro inverter using a coil-free fan as a heat dissipation device

Abstract

The utility model discloses a micro inverter using a coilless fan as a heat dissipation device, comprising a housing, a cover assembly, a circuit board assembly, an input and output connector, a WiFi antenna, a mode switching switch knob, a coilless fan and a fan cover. The coilless fan comprises a piezoelectric ceramic sheet, a vibrating steel sheet, a fan housing and a drive module; the utility model uses a coilless fan as a heat dissipation device, the coilless fan does not contain an electromagnetic coil and a rotating part, and can be used in a high temperature, high humidity and dusty environment for a long life.

Description

Technical Field

[0001] The utility model relates to the technical field of micro inverters, in particular to a micro inverter using a coil-free fan as a heat dissipation device. Background Art

[0002] At present, traditional micro inverters are more likely to reduce power or even fail to output due to high ambient temperature in a sunny environment. Even if a micro inverter uses a heat pipe as a heat transfer medium, there is a certain probability that the heat pipe will leak, resulting in a protective power reduction or even a failure to output. Inverters that use axial fans or centrifugal fans as heat dissipation devices are more likely to reduce power or even fail to output in rain or even dusty environments. In addition, the service life of traditional fans is relatively short and the failure rate is relatively high. At present, traditional micro inverters are divided into two output modes: on-grid and off-grid. It is impossible to switch between on-grid and off-grid on the inverter, and it cannot meet the requirements of different usage environments. Utility Model Content

[0003] In view of the above situation, the applicant has conducted research and improvement, and provided a micro inverter that uses a coilless fan as a heat dissipation device. The coilless fan applies an alternating voltage to the ceramic sheet, causing the ceramic sheet to deform, driving the steel sheet to make periodic reciprocating motion, fanning the air to form a stable airflow, effectively reducing the temperature of the inverter, and can work stably for a long time in the sun, high temperature, rain and even dusty environments. When it is necessary to switch between the on-grid and off-grid output modes, the on-grid and off-grid functions can be switched by turning the mode switch knob.

[0004] In order to solve the above technical problems, the utility model provides a micro inverter using a coil-free fan as a heat dissipation device, including a housing, a cover assembly, a circuit board assembly, an input and output connector, a WiFi antenna, and a mode switching switch knob;

[0005] The cover assembly is located at the bottom of the shell, and the circuit board assembly is located inside the shell; the input and output connectors, WiFi antenna, and mode switching switch knob are located outside the shell; and a coil-free fan assembly is also included, and the coil-free fan assembly is located on the top of the circuit board assembly.

[0006] As a preferred embodiment of the present invention, the cover plate assembly includes a cover plate, a display screen and a light indication assembly, and the display screen and the light indication assembly are located at the upper end of the cover plate.

[0007] As a further preferred embodiment of the present invention, the circuit board assembly includes a DC to AC drive board and a lithium battery charging protection board.

[0008] As a further preferred embodiment of the present invention, the input and output connectors include a positive plug connected to a photovoltaic panel, a negative plug connected to a photovoltaic panel, a positive plug connected to a battery, a negative plug connected to a battery, and also include a control signal socket and an AC output socket.

[0009] As a further preferred embodiment of the present invention, the coil-free fan includes a piezoelectric ceramic sheet, a vibration steel sheet, a fan housing and a drive module.

[0010] After adopting the above technical solution, the beneficial effects of the utility model are as follows:

[0011] The utility model uses a coil-free fan, which can effectively reduce the temperature of the inverter and can work stably for a long time in the sun, high temperature, rain and even dusty environment. When it is necessary to switch between the on-grid and off-grid output modes, the on-grid and off-grid functions can be switched by turning the mode switch knob. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 A schematic diagram of the mechanism of the utility model;

[0013] Figure 2 A schematic diagram of a cover plate assembly of the utility model;

[0014] Figure 3 Schematic diagram of other components of the utility model;

[0015] Figure 4 Schematic diagram of the coil-free fan generating airflow of the utility model; DETAILED DESCRIPTION

[0016] The utility model is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0017] Combination Figure 1 , Figure 2 , Figure 3 It can be seen that a micro inverter using a coil-free fan as a heat dissipation device includes a housing 11, a cover assembly 12, a circuit board assembly 13, input and output connectors, a WiFi antenna 15, and a mode switching switch knob 16.

[0018] In the above structure, the cover assembly 12 is located at the bottom of the shell 11, and the circuit board assembly is located inside the shell 11; the input and output connectors, the WiFi antenna 15, and the mode switching knob 16 are located on the outside of the shell 11; the utility model also includes a coil-free fan assembly, which is located on the upper part of the circuit board assembly 131.

[0019] In the present invention, the preferred cover plate assembly 12 includes a cover plate 121 , a display screen 122 and a light indication assembly 123 , wherein the display screen 122 and the light indication assembly 123 are located at the upper end of the cover plate 121 .

[0020] In the present invention, the preferred circuit board assembly 13 includes a DC to AC drive board 131 and a lithium battery charging protection board 132 .

[0021] In the present invention, the preferred input and output connectors include a positive plug 141 connected to the photovoltaic panel, a negative plug 142 connected to the photovoltaic panel, a positive plug 143 connected to the battery, a negative plug 144 connected to the battery, and also include a control signal socket 145 and an AC output socket 146.

[0022] In the present invention, the preferred coil-free fan includes a piezoelectric ceramic sheet 171 , a vibration steel sheet 172 , a fan housing 173 and a driving module 174 .

[0023] like Figure 3 and Figure 4 As shown, the process of the coil-free fan of the utility model generating airflow is as follows: the coil-free fan applies an alternating voltage to the piezoelectric ceramic sheet 171 through the driving module 174, the piezoelectric ceramic sheet 171 is deformed, and the vibrating steel sheet 172 is driven to perform periodic reciprocating motion, fanning the air to form a stable airflow.

[0024] like Figure 3 As shown, the process of switching between the on-grid and off-grid output modes of the utility model is as follows: the on-grid and off-grid function switching is achieved by rotating the mode switching switch knob 16.

[0025] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principle of the present invention. These improvements and modifications should also be regarded as the protection scope of the present invention.

Claims

1. A micro inverter using a coil-free fan as a heat dissipation device, comprising a housing (11), a cover assembly (12), a circuit board assembly (13), an input and output connector, a WiFi antenna (15), and a mode switching knob (16); The cover plate assembly (12) is located at the bottom of the housing (11), and the circuit board assembly is located inside the housing (11); the input and output connectors, the WiFi antenna (15), and the mode switch knob (16) are located outside the housing (11); characterized in that: It also includes a coil-free fan assembly, which is located on the upper part of the circuit board assembly (13).

2. A micro inverter using a coil-free fan as a heat dissipation device as claimed in claim 1, characterized in that: The cover plate assembly (12) comprises a cover plate (121), a display screen (122) and a light indication assembly (123), wherein the display screen (122) and the light indication assembly (123) are located at the upper end of the cover plate (121).

3. A micro inverter using a coil-free fan as a heat dissipation device as claimed in claim 1, characterized in that: The circuit board assembly (13) comprises a direct current to alternating current drive board (131) and a lithium battery charging protection board (132).

4. A micro inverter using a coil-free fan as a heat dissipation device as claimed in claim 1, characterized in that: The input and output connectors include a positive plug (141) connected to a photovoltaic panel, a negative plug (142) connected to a photovoltaic panel, a positive plug (143) connected to a battery, a negative plug (144) connected to a battery, and also include a control signal socket (145) and an AC output socket (146).

5. A micro inverter using a coil-free fan as a heat dissipation device as claimed in claim 1, characterized in that: The coil-free fan comprises a piezoelectric ceramic sheet (171), a vibration steel sheet (172), a fan housing (173) and a drive module (174).

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