Temperature monitoring device for a photovoltaic inverter

Abstract

The utility model discloses a temperature monitoring device for photovoltaic inverter, include: install the fixed box in the inside of inverter casing, the inner chamber of fixed box swingly be provided with mounting seat, install two groups of temperature detection sensor on the mounting seat, the utility model discloses a fixed box is installed in the inside of inverter casing, and the temperature detection sensor is convenient in the inside of inverter, then through the lifting assembly, the height of mounting seat is adjusted, makes the temperature detection sensor on mounting seat to the electrical equipment of different height position carries out stable detection, and the telescopic adjustment of temperature detection sensor is carried out to cooperation adjustment assembly, and the temperature detection sensor is contacted with different electrical equipment conveniently, promotes the accuracy of inverter each part temperature detection, avoids the temperature of traditional temperature detection mode detection and is low, and the gathering of heat is easy to cause, leads to actual temperature than detection temperature and is high, causes the heat dispersion component to be unable to spread heat in time, and easy to cause safety accidents.

Description

Technical Field

[0001] This utility model relates to the field of photovoltaic power generation technology, specifically a temperature monitoring device for photovoltaic inverters. Background Technology

[0002] A photovoltaic (PV) inverter converts the variable DC voltage generated by photovoltaic (PV) solar panels into AC power at the grid frequency. This AC power can be fed back into commercial transmission systems or supplied to off-grid systems. PV inverters are a crucial component for system balancing in PV array systems and can be used in conjunction with general AC-powered equipment. Solar inverters also offer special features specific to PV arrays, such as maximum power point tracking and islanding protection.

[0003] To ensure stable operation of inverters, heat dissipation components are typically required. The activation, deactivation, and power regulation of these components rely on temperature monitoring data. Current technologies often employ fixed, non-contact sensors for temperature monitoring. These sensors are usually suspended inside the inverter housing or fixed to the housing wall, indirectly reflecting the equipment's operating status by detecting the surrounding air temperature. However, this approach has several drawbacks: insufficient detection accuracy; the dense layout of electrical components inside the inverter results in significant differences in heat intensity across different areas, leading to a noticeable discrepancy between air temperature and the actual component temperature, easily resulting in underestimating the measured value; misjudgment due to heat accumulation; when heat accumulates in localized components due to poor heat dissipation, non-contact sensors struggle to capture the localized high temperatures, widening the difference between the actual and measured temperatures. This can cause the heat dissipation components to fail to activate promptly or operate at insufficient power, leading to continuous heat accumulation; and potential safety risks; long-term temperature detection errors can cause delayed heat dissipation, potentially leading to component overheating and aging, decreased insulation performance, and in severe cases, even short circuits, fires, and other safety accidents, affecting the reliability and lifespan of the photovoltaic system. Utility Model Content

[0004] The purpose of this invention is to provide a temperature monitoring device for photovoltaic inverters. The device uses a lifting assembly to adjust the height of the mounting base inside the fixed box, which facilitates the adjustment of the height of the temperature sensor. In conjunction with the adjustment assembly, the temperature sensor can be extended or retracted, enabling contact detection at key temperature detection points and improving the accuracy of temperature detection by the temperature sensor. This addresses the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a temperature monitoring device for a photovoltaic inverter, comprising:

[0006] A mounting box installed inside the inverter housing;

[0007] The inner cavity of the fixed box is movably provided with a mounting base, on which two sets of temperature detection sensors are mounted. The inner cavity of the fixed box is provided with a lifting component for adjusting the height of the mounting base. The mounting base is provided with an adjustment component for alternately extending and retracting the two sets of temperature detection sensors to monitor the temperature of different components. One side of the fixed box has two through slots for the temperature detection sensors to enter and exit.

[0008] Preferably, the lifting assembly includes two sets of support plates fixed in the inner cavity of the fixed box. A lead screw is rotatably connected between the support plates via bearings. The mounting seat is threaded to the outside of the lead screw. A first drive motor is fixed to the outside of one set of the support plates. The output shaft of the first drive motor passes through the support plate and is fixedly connected to one end of the lead screw.

[0009] Preferably, the adjustment assembly includes two sets of threaded sleeves rotatably connected inside the mounting base via bearings. The inner cavity of each threaded sleeve is threaded with a threaded rod. The temperature detection sensor is installed at one end of the two threaded rods that extends to the outside of the mounting base. A second drive motor is fixed to the outside of the mounting base. A drive pulley is fixed to the output shaft of the second drive motor. A driven pulley is fixed to the outside of each threaded sleeve. The drive pulley and the driven pulley are connected by a synchronous belt drive.

[0010] Preferably, the end of the threaded rod away from the temperature sensor has a square hole, and a square column is fixed inside the mounting base, with the square column slidably disposed within the square hole.

[0011] Preferably, the inner cavity of the fixing box is also provided with a protective strip to block the through groove. The inner cavity of the fixing box is rotatably connected to two sets of support rollers through bearings. The support rollers are located outside the support plate and support the protective strip. Two sets of protective rings are fixed on the protective strip and sleeved on the outside of the threaded sleeve.

[0012] Preferably, the threads in the two sets of threaded sleeves are in opposite directions, and a mounting plate with mounting holes is fixed on the side of the fixing box away from the through groove.

[0013] Preferably, the mounting base has grooves on both sides, and guide plates are fixed on both sides of the inner cavity of the fixing box, with the guide plates slidably disposed in the grooves.

[0014] Compared with the prior art, the beneficial effects of this utility model are:

[0015] 1. This utility model installs a fixing box inside the inverter housing, facilitating the placement of a temperature detection sensor within the inverter. A lifting assembly then adjusts the height of the mounting base, allowing the temperature detection sensor on the mounting base to stably detect electrical equipment at different heights. Simultaneously, an adjustment assembly allows for the extension and retraction of the temperature detection sensor, facilitating contact between the sensor and various electrical devices. This improves the accuracy of temperature detection across different parts of the inverter, avoiding the problem of traditional temperature detection methods that detect low temperatures, leading to heat accumulation and causing the actual temperature to be higher than the detected temperature. This prevents the heat dissipation components from dissipating heat effectively, potentially causing safety accidents.

[0016] 2. This utility model limits the direction of the threads of two sets of threaded sleeves to ensure that one set of temperature detection sensors detects the temperature of electrical equipment through contact, while the other set is non-contact for data comparison. Attached Figure Description

[0017] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0018] Figure 2 This is a partial side view sectional structural diagram of the fixing box of this utility model;

[0019] Figure 3 This is a cross-sectional perspective view of the fixing box of this utility model;

[0020] Figure 4 This is a rear cross-sectional three-dimensional structural diagram of the mounting base of this utility model;

[0021] Figure 5 This is a partially disassembled three-dimensional structural diagram of the adjustment component of this utility model;

[0022] Figure 6 This is a three-dimensional structural diagram of the protective belt of this utility model.

[0023] The following are the labeling elements in the diagram: 1. Fixing box; 2. Mounting base; 3. Temperature sensor; 4. Lifting assembly; 41. Support plate; 42. Lead screw; 43. First drive motor; 5. Adjustment assembly; 51. Threaded sleeve; 52. Threaded rod; 53. Second drive motor; 54. Drive pulley; 55. Driven pulley; 56. Synchronous belt; 6. Through groove; 7. Square hole; 8. Square column; 9. Protective belt; 10. Support roller; 11. Protective ring; 12. Mounting plate; 13. Groove; 14. Guide plate. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0025] like Figures 1-6 As shown, this utility model provides a temperature monitoring device for a photovoltaic inverter, including: a fixed box 1 installed inside the inverter housing; a mounting base 2 is movably arranged in the inner cavity of the fixed box 1, two sets of temperature detection sensors 3 are installed on the mounting base 2, a lifting component 4 for adjusting the height of the mounting base 2 is provided in the inner cavity of the fixed box 1, an adjustment component 5 is provided on the mounting base 2 for alternately extending and retracting the two sets of temperature detection sensors 3 to monitor the temperature of different components, and two through slots 6 are opened on one side of the fixed box 1 for the temperature detection sensors 3 to enter and exit. This device shares a control system with the inverter.

[0026] By installing the mounting box 1 inside the inverter housing, the temperature sensor 3 can be easily placed inside the inverter. Then, the height of the mounting base 2 can be adjusted by the lifting component 4, so that the temperature sensor 3 on the mounting base 2 can stably detect electrical equipment at different heights. At the same time, the temperature sensor 3 can be extended and retracted by the adjustment component 5, which facilitates contact between the temperature sensor 3 and different electrical equipment. This improves the accuracy of temperature detection in various parts of the inverter and avoids the problem of traditional temperature detection methods detecting too low a temperature, which can easily cause heat accumulation and lead to the actual temperature being higher than the detected temperature. This can prevent the heat dissipation components from dissipating heat in time and may cause safety accidents.

[0027] like Figure 2 and Figure 3 As shown, the lifting assembly 4 includes two sets of support plates 41 fixed in the inner cavity of the fixed box 1. A lead screw 42 is rotatably connected between the support plates 41 via bearings. The mounting seat 2 is threaded to the outside of the lead screw 42. A first drive motor 43 is fixed to the outside of one set of support plates 41. The output shaft of the first drive motor 43 passes through the support plate 41 and is fixedly connected to one end of the lead screw 42. The lead screw 42 is supported by the two sets of support plates 41 to ensure the stability of the lead screw 42. At the same time, the first drive motor 43 drives the lead screw 42 to rotate, which facilitates the driving of the mounting seat 2, so that the mounting seat 2 can move up and down on the lead screw 42.

[0028] like Figure 4 and Figure 5As shown, the adjustment assembly 5 includes two sets of threaded sleeves 51 rotatably connected inside the mounting base 2 via bearings. Threaded rods 52 are threadedly connected to the inner cavity of each threaded sleeve 51. A temperature sensor 3 is mounted on one end of the two sets of threaded rods 52 extending to the outside of the mounting base 2. A second drive motor 53 is fixed to the outside of the mounting base 2. A drive pulley 54 is fixed to the output shaft of the second drive motor 53. A driven pulley 55 is fixed to the outside of each threaded sleeve 51. The drive pulley 54 and the driven pulley 55 are connected by a synchronous belt 56. The second drive motor 53 drives the drive pulley 54 to rotate, which, in conjunction with the synchronous belt 56, synchronously drives the driven pulley 55 and the threaded sleeves 51. Then, the rotation of the two sets of threaded sleeves 51 drives the threaded rods 52, causing the threaded rods 52 to extend and retract within the threaded sleeves 51. This allows the temperature sensor 3, fixed at one end of the threaded rod 52, to contact the electrical equipment, improving the detection accuracy of the temperature sensor 3.

[0029] like Figure 5 As shown, a square hole 7 is provided at the end of the threaded rod 52 away from the temperature detection sensor 3. A square post 8 is fixed inside the mounting base 2. The square post 8 is slidably disposed in the square hole 7. The cooperation between the square post 8 and the square hole 7 facilitates the restriction of the threaded rod 52, preventing the threaded rod 52 from rotating with the rotation of the threaded sleeve 51, and ensuring that the threaded rod 52 can move telescopically within the threaded sleeve 51.

[0030] It is worth noting that, such as Figure 6 As shown, the inner cavity of the fixed box 1 is also provided with a protective strip 9 to block the through groove 6. The inner cavity of the fixed box 1 is rotatably connected to two sets of support rollers 10 through bearings. The support rollers 10 are located outside the support plate 41 and support the protective strip 9. Two sets of protective rings 11 are fixed on the protective strip 9 and sleeved on the outside of the threaded sleeve 51. The protective strip 9 is supported by the two sets of support rollers 10, and then the threaded sleeve 51 is connected to the protective strip 9 by the protective rings 11. As the height of the mounting base 2 is adjusted, the protective strip 9 blocks the through groove 6 and isolates the inside and outside of the fixed box 1.

[0031] like Figure 1 As shown, the threads in the two sets of threaded sleeves 51 are opposite. The mounting plate 12 with mounting holes is fixed on the side of the fixed box 1 away from the through groove 6. The direction of the threads of the two sets of threaded sleeves 51 is limited to ensure that one set of temperature detection sensors 3 performs temperature detection on the electrical equipment through contact, while the other set is non-contact for data comparison.

[0032] like Figure 2 , Figure 3As shown, the mounting base 2 has grooves 13 on both sides, and guide plates 14 are fixed on both sides of the inner cavity of the fixing box 1. The guide plates 14 are slidably disposed in the grooves 13. Through the cooperation between the grooves 13 and the guide plates 14, the mounting base 2 is conveniently limited to prevent the mounting base 2 from rotating with the lead screw 42, which would cause the mounting base 2 to come into contact with and wear the protective belt 9.

[0033] In practical use, the mounting box 1 is installed inside the inverter housing via the mounting plate 12. Since the electrical equipment layout inside the inverter is designed and the distance between it and the inverter housing is fixed, the inverter generates heat during normal operation. The controller then controls the first drive motor 43, which in turn drives the lead screw 42 to rotate. The lead screw 42 drives the mounting base 2 to move up and down on the lead screw 42. Simultaneously, the mounting base 2 adjusts the height of the temperature sensor 3 via the threaded sleeve 51 and the threaded rod 52. Based on the height position of the mounting base 2, the second drive motor... Drive pulley 54 is driven by drive 53, and then drive pulley 54 drives driven pulley 55 and threaded sleeve 51 to rotate via synchronous belt 56. When the two sets of threaded sleeves 51 rotate, the two sets of threaded rods 52 extend and retract in opposite directions. The outwardly extending threaded rods 52 carry temperature detection sensors 3 and contact the electrical equipment inside the inverter to accurately monitor the surface temperature of each electrical device. The other set of temperature detection sensors 3 is used to detect the air temperature inside the inverter housing for comparison. At the same time, it prevents damage to one set of temperature detection sensors 3, and the other set can be used as a backup device.

[0034] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A temperature monitoring device for a photovoltaic inverter, characterized in that, include: A mounting box (1) installed inside the inverter housing; The inner cavity of the fixed box (1) is movably provided with a mounting base (2), and two sets of temperature detection sensors (3) are installed on the mounting base (2). The inner cavity of the fixed box (1) is provided with a lifting component (4) for adjusting the height of the mounting base (2). The mounting base (2) is provided with an adjustment component (5) for alternately extending and retracting the two sets of temperature detection sensors (3) to monitor the temperature of different components. Two through slots (6) are opened on one side of the fixed box (1) for the temperature detection sensors (3) to enter and exit.

2. The temperature monitoring device for a photovoltaic inverter according to claim 1, characterized in that: The lifting assembly (4) includes two sets of support plates (41) fixed in the inner cavity of the fixed box (1). A lead screw (42) is rotatably connected between the support plates (41) through bearings. The mounting seat (2) is threaded to the outside of the lead screw (42). A first drive motor (43) is fixed to the outside of one set of support plates (41). The output shaft of the first drive motor (43) passes through the support plate (41) and is fixedly connected to one end of the lead screw (42).

3. The temperature monitoring device for a photovoltaic inverter according to claim 1, characterized in that: The adjustment assembly (5) includes two sets of threaded sleeves (51) rotatably connected inside the mounting base (2) via bearings. The inner cavity of the threaded sleeve (51) is threaded with a threaded rod (52). The temperature detection sensor (3) is installed at one end of the two sets of threaded rods (52) extending to the outside of the mounting base (2). A second drive motor (53) is fixed to the outside of the mounting base (2). The output shaft of the second drive motor (53) is fixed with a drive pulley (54). A driven pulley (55) is fixed to the outside of the threaded sleeve (51). The drive pulley (54) and the driven pulley (55) are connected by a synchronous belt (56).

4. The temperature monitoring device for a photovoltaic inverter according to claim 3, characterized in that: The threaded rod (52) has a square hole (7) at the end away from the temperature sensor (3), and a square column (8) is fixed inside the mounting base (2), which is slidably disposed in the square hole (7).

5. The temperature monitoring device for a photovoltaic inverter according to claim 1, characterized in that: The inner cavity of the fixed box (1) is also provided with a protective strip (9) to block the through groove (6). The inner cavity of the fixed box (1) is rotatably connected to two sets of support rollers (10) through bearings. The support rollers (10) are located outside the support plate (41) and support the protective strip (9). Two sets of protective rings (11) are fixed on the protective strip (9) and sleeved on the outside of the threaded sleeve (51).

6. The temperature monitoring device for a photovoltaic inverter according to claim 3, characterized in that: The threads in the two sets of threaded sleeves (51) are opposite, and the mounting plate (12) with mounting holes is fixed on the side of the fixed box (1) away from the through groove (6).

7. The temperature monitoring device for a photovoltaic inverter according to claim 1, characterized in that: The mounting base (2) has grooves (13) on both sides, and guide plates (14) are fixed on both sides of the inner cavity of the fixing box (1). The guide plates (14) are slidably disposed in the grooves (13).

Images