Overheat protection structure for optical storage inverter

Abstract

The utility model discloses an overheating protection structure for a light storage inverter, which comprises a light storage inverter body, a temperature controller and an input lead, and the temperature controller is connected in series in the input lead. The temperature controller comprises an aluminum shell, a mounting seat, a cover plate, a pair of binding posts, a movable contact piece, a fixed contact piece, a push rod, a bimetallic strip and a limiting plate; a movable contact on the movable contact piece is elastically connected with a fixed contact on the fixed contact piece; the movable contact piece and the fixed contact piece are respectively connected to the cover plate through a binding post; one end of the push rod is fixedly connected to the bimetallic strip, penetrates through the middle part of the limiting plate and is pulled in the limiting plate or extends out of the limiting plate; when the bimetallic strip suddenly jumps towards the direction of the limiting plate due to high temperature, the push rod is pushed to extend out of the limiting plate and abut against the movable contact piece, so that the movable contact is separated from the fixed contact. The input lead forms an open circuit, and the optical storage inverter body does not have an input power supply and stops working. And no heat is generated. And the temperature of the optical storage inverter body is gradually reduced.

Description

Technical Field

[0001] The utility model relates to an overheat protection structure for a photovoltaic storage inverter, belonging to the technical field of inverters. Background Art

[0002] The photovoltaic inverter converts direct current into alternating current. During operation, it generates heat, causing the temperature to rise and eventually burn out the photovoltaic inverter. Generally, people can reduce the temperature by installing heat sink fins on the photovoltaic inverter to dissipate heat. However, the photovoltaic inverter is still working and still generating heat. If the photovoltaic inverter can be stopped and the heat generation can be stopped, the temperature will no longer rise. This protects the safety of the photovoltaic inverter. Therefore, how to stop the operation of the photovoltaic inverter based on the temperature value of the photovoltaic inverter is a technical problem that those skilled in the art urgently need to solve. Utility Model Content

[0003] In response to one or more of the above-mentioned defects or improvement needs in the prior art, the present invention provides an overheating protection structure for a photovoltaic storage inverter.

[0004] In order to achieve the above purpose, the technical solution adopted by the present invention is: an overheating protection structure for a photovoltaic storage inverter, comprising a photovoltaic storage inverter body, a thermostat and an input wire, wherein the thermostat is connected in series with the input wire; the thermostat comprises an aluminum shell, a mounting seat, a cover plate, a pair of terminals, a moving contact piece, a fixed contact piece, a fixed contact point, a moving contact point, a push rod, a bimetallic sheet and a limit plate, the mounting seat is connected to the periphery of the aluminum shell and is fixedly connected to the photovoltaic storage inverter body; the bimetallic sheet is installed on the top of the aluminum shell end, the moving contact on the moving contact piece and the fixed contact on the fixed contact piece are elastically connected; the limit plate is fixedly connected to the middle of the aluminum shell; the moving contact piece and the fixed contact piece are respectively connected to the cover plate through a terminal; the cover plate covers the bottom end of the aluminum shell; one end of the push rod is fixedly connected to the upper side of the bimetallic strip, passes through the middle part of the limit plate, and is pulled or extended in the limit plate; when the bimetallic strip is subjected to high temperature and suddenly jumps toward the limit plate, it pushes the push rod to extend from the limit plate, hits the moving contact piece, and separates the moving contact from the fixed contact.

[0005] As a further improvement of the present invention, a touch plate is connected to the middle of the movable contact piece, and the width of the movable contact piece is narrower than that of the touch plate; the touch plate is located on the movement path of the push rod.

[0006] As a further improvement of the present invention, a fuse is further connected in series to the input wire.

[0007] As a further improvement of the present invention, a plurality of heat dissipation fins are connected to the surface of the solar-storage inverter body.

[0008] As a further improvement of the present invention, a fan is connected to one end of the photovoltaic storage inverter body, and the fan includes an air guide shell, fan blades, a motor and a bracket. The motor is fixedly connected to one end of the photovoltaic storage inverter body to drive the fan blades to rotate. The air guide shell is connected to one end of the photovoltaic storage inverter body through the bracket. An air inlet is provided in the middle of the air guide shell. The slit between the air guide shell and the photovoltaic storage inverter body forms an air outlet, and the air outlet is facing the longitudinal direction of the heat dissipation fins.

[0009] As a further improvement of the present invention, the fixed contact and the movable contact are both made of magnetic conductive materials, and the fixed contact and the movable contact attract each other.

[0010] The above-mentioned improved technical features can be combined with each other as long as they do not conflict with each other.

[0011] In general, the above technical solutions conceived by the present invention have the following beneficial effects compared with the prior art:

[0012] (1) The heat of the photovoltaic storage inverter body of the present invention is transferred to the bimetallic strip through the aluminum shell. When the set temperature is reached, the bimetallic strip is subjected to the high temperature and suddenly jumps toward the limit plate. One end of the push rod is fixedly connected to the upper part of the bimetallic strip, passes through the middle part of the limit plate, and is pulled or extended in the limit plate; the push rod is pushed out of the limit plate, and hits the moving contact piece, so that the moving contact is separated from the fixed contact. The input wire is broken, and the photovoltaic storage inverter body has no input power and stops working. No more heat is generated. The temperature of the photovoltaic storage inverter body gradually decreases. When the temperature drops to the set value, the bimetallic strip suddenly jumps in the opposite direction, and the push rod and the moving contact piece return to their original state, so that the moving contact is in contact with the fixed contact. The photovoltaic storage inverter body starts working again.

[0013] (2) The present utility model

[0014] (3) The present utility model

[0015] (4) The present utility model

[0016] (5) The present utility model BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic structural diagram of an overheat protection structure for a photovoltaic storage inverter according to a preferred embodiment of the present invention;

[0018] Figure 2 for Figure 1 Schematic diagram of the structure of the medium temperature controller;

[0019] Figure 3 for Figure 1 Schematic diagram of the structure of the middle push rod and touch plate;

[0020] Figure 4A schematic diagram of the overheat protection structure for a solar-storage inverter from another perspective.

[0021] In all the drawings, the same figure marks represent the same technical features, specifically: 1. Solar energy storage inverter body; 2. Thermostat; 3. Fuse; 4. Heat dissipation fins; 5. Fan; 6. Input wire; 21. Aluminum shell; 22. Mounting seat; 23. Cover plate; 24. Terminal; 25. Moving contact piece; 26. Fixed contact piece; 27. Fixed contact; 28. Moving contact; 29. Push rod; 30. Bimetallic strip; 31. Limit plate; 32. Touch plate; 51. Air guide shell; 52. Fan blades; 53. Motor; 54. Air inlet; 55. Air outlet; 56. Bracket. DETAILED DESCRIPTION

[0022] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0023] In addition, the technical features involved in the various embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0024] The bamboo strips feeding machine in the preferred embodiment of the present invention is as follows Figures 1 to 4 As shown in, an overheating protection structure for a photovoltaic storage inverter includes a photovoltaic storage inverter body 1, a thermostat 2 and an input wire 6, wherein the thermostat 2 is connected in series with the input wire 6; the thermostat 2 includes an aluminum shell 21, a mounting seat 22, a cover plate 23, a pair of terminals 24, a moving contact piece 25, a fixed contact piece 26, a fixed contact point 27, a moving contact 28, a push rod 29, a bimetallic strip 30 and a limit plate 31, the mounting seat 22 is connected to the periphery of the aluminum shell 21 and is fixedly connected to the photovoltaic storage inverter body 1; the bimetallic strip 30 is installed at the top of the inner part of the aluminum shell 21, and the moving contact 28 on the moving contact piece 25 is fixed. It is elastically connected to the fixed contact 27 on the fixed contact piece 26; the limit plate 31 is fixedly connected to the middle of the aluminum shell 21; the movable contact piece 25 and the fixed contact piece 26 are respectively connected to the cover plate 23 through a terminal 24; the cover plate 23 covers the bottom end of the aluminum shell 21; one end of the push rod 29 is fixedly connected to the upper part of the bimetallic strip 30, passes through the middle part of the limit plate 31, and is pulled or extended in the limit plate 31; when the bimetallic strip 30 is subjected to high temperature and suddenly jumps toward the limit plate 31, it pushes the push rod 29 to extend from the limit plate 31, hits the movable contact piece 25, and separates the movable contact 28 from the fixed contact 27.

[0025] Heat from the solar-storage inverter body 1 is transferred through the aluminum shell 21 to the bimetallic strip 30. The bimetallic strip 30 is made of metal sheets with different expansion coefficients. Existing bimetallic strips 30 are also suitable for use in this application. When the set temperature is reached, the bimetallic strip 30, exposed to the high temperature, snaps toward the stop plate 31. One end of the push rod 29, fixedly connected to the top of the bimetallic strip 30, penetrates the middle of the stop plate 31, and pulls or extends within the stop plate 31. This push rod 29 extends from the stop plate 31, abutting against the movable contact 25, separating the movable contact 28 from the fixed contact 27. This disconnects the input wire 6, depriving the solar-storage inverter body of input power and halting operation. No more heat is generated, and the temperature of the solar-storage inverter body 1 gradually decreases. Once the temperature drops to the set value, the bimetallic strip 30 snaps back, and the push rod 29 and movable contact 25 return to their original positions, allowing the movable contact 28 to contact the fixed contact 27. The solar-storage inverter body resumes operation.

[0026] Furthermore, a contact plate 32 is connected to the middle of the movable contact piece 25. The width of the movable contact piece 25 is narrower than that of the contact plate 32; the contact plate 32 is located in the motion path of the push rod 29. The wider contact plate 32 facilitates accurate contact with the push rod 29, transmitting the force of the push rod 29 to the movable contact piece 25, causing the movable contact 28 on the movable contact piece 25 to separate from the fixed contact 27 on the fixed contact piece 26. The input wire 6 is disconnected. The solar-storage inverter body 1 ceases operation and no longer generates heat.

[0027] Furthermore, a fuse 3 is connected in series to the input wire 6. When the power of the solar-storage inverter increases abnormally, the temperature rises rapidly, the fuse 3 melts, and the input wire 6 is disconnected. The solar-storage inverter 1 stops working and no longer generates heat.

[0028] Furthermore, a plurality of heat dissipation fins 4 are connected to the surface of the photovoltaic storage inverter body 1. The heat dissipation fins 4 can transfer heat to the surrounding air in a timely manner, effectively reducing the temperature of the photovoltaic storage inverter body 1.

[0029] Furthermore, a fan 5 is connected to one end of the solar-storage inverter body 1. The fan 5 includes an air guide housing 51, fan blades 52, a motor 53, and a bracket 56. The motor 53 is fixedly connected to one end of the solar-storage inverter body 1 and drives the fan blades 52 to rotate. The air guide housing 51 is connected to one end of the solar-storage inverter body 1 via the bracket 56. An air inlet 54 is provided in the middle of the air guide housing 51. A slit between the air guide housing 51 and the solar-storage inverter body 1 forms an air outlet 55, which faces the longitudinal direction of the heat dissipation fins 4. The motor 53 drives the fan blades 52 to rotate, creating a negative pressure within the air guide housing. Outside air enters the air guide housing through the air inlet 54 and is discharged through the air outlet 55. It passes through the gaps between adjacent heat dissipation fins 4, accelerating heat dissipation.

[0030] Furthermore, the fixed contact 27 and the movable contact 28 are both made of magnetic conductive material, and the fixed contact 27 and the movable contact 28 attract each other. The fixed contact 27 and the movable contact 28 made of magnetic material attract each other, avoiding the loss of contact caused by misalignment.

[0031] It will be easily understood by those skilled in the art that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention shall be included in the scope of protection of the present invention.

Claims

1. An overheat protection structure for a photovoltaic storage inverter, comprising a photovoltaic storage inverter body, a thermostat and an input wire, wherein the thermostat is connected in series with the input wire; characterized in that: The temperature controller includes an aluminum shell, a mounting base, a cover plate, a pair of terminals, a moving contact piece, a fixed contact piece, a fixed contact, a moving contact, a push rod, a bimetallic strip and a limit plate. The mounting base is connected to the periphery of the aluminum shell and is fixedly connected to the photovoltaic inverter body; the bimetallic strip is installed at the top end of the aluminum shell; the limit plate is fixedly connected to the middle part of the aluminum shell; the moving contact piece and the fixed contact piece are respectively connected to the cover plate through a terminal, and the moving contact on the moving contact piece is elastically connected to the fixed contact on the fixed contact piece; the cover plate covers the bottom end of the aluminum shell; one end of the push rod is fixedly connected to the upper part of the bimetallic strip, passes through the middle part of the limit plate, and is pulled or extended in the limit plate; when the bimetallic strip is subjected to high temperature and suddenly jumps toward the limit plate, it pushes the push rod to extend from the limit plate, hits the moving contact piece, and separates the moving contact from the fixed contact.

2. The overheat protection structure for a solar-storage inverter according to claim 1, characterized in that: The middle of the movable contact piece is connected with a touch plate, and the width of the movable contact piece is narrower than that of the touch plate; the touch plate is located on the movement path of the push rod.

3. The overheat protection structure for a solar-storage inverter according to claim 2, characterized in that: The input wire is also connected in series with a fuse.

4. The overheat protection structure for a solar-storage inverter according to claim 3, characterized in that: A plurality of heat dissipation fins are connected to the surface of the solar-storage inverter body.

5. The overheat protection structure for a solar-storage inverter according to claim 4, characterized in that: A fan is connected to one end of the photovoltaic inverter body, and the fan includes an air guide housing, fan blades, a motor and a bracket. The motor is fixedly connected to one end of the photovoltaic inverter body to drive the fan blades to rotate. The air guide housing is connected to one end of the photovoltaic inverter body through the bracket. An air inlet is provided in the middle of the air guide housing. The slit between the air guide housing and the photovoltaic inverter body forms an air outlet, and the air outlet is facing the longitudinal direction of the heat dissipation fins.

6. The overheat protection structure for a solar-storage inverter according to claim 5, characterized in that: The fixed contact and the movable contact are both made of magnetic conductive materials, and the fixed contact and the movable contact attract each other.

Images