Frequency converter with energy feedback for elevator

Abstract

The utility model belongs to the field of elevator frequency converters, and provides an elevator frequency converter with energy feedback, which comprises a casing, a frequency converter module and an energy feedback module, a support part is arranged on the inner wall of the casing, the energy feedback module is mounted on the upper surface of the support part, the frequency converter module is mounted in the casing, and the energy feedback module is positioned above the frequency converter module; a ventilation assembly is arranged on the side wall of the machine shell. According to the utility model, the ventilation assembly is arranged to carry out heat dissipation on the whole frequency converter and the energy feedback module, and assists in leading out heat in a gap between the two modules, thereby avoiding the situation that heat in the frequency converter is concentrated and difficult to discharge, effectively reducing the temperature of equipment, ensuring that the equipment operates in a normal working temperature range, and improving the working efficiency. The stability and reliability of equipment are improved, and the service life of the equipment is prolonged.

Description

Technical Field

[0001] The utility model belongs to the field of elevator inverters, and more specifically, it is an elevator inverter with energy feedback. Background Art

[0002] As a frequently used vertical transportation tool in buildings, the energy consumption of elevators cannot be underestimated. During the operation of traditional elevator inverters, when the elevator decelerates, brakes or descends, the motor is in a power generation state and will generate a large amount of regenerative energy. If this energy cannot be effectively utilized, it is usually dissipated as heat on the braking resistor, resulting in energy waste. The elevator inverter with energy feedback emerged under such a background. It can feed back the regenerative energy generated during the operation of the elevator to the power grid, realizing the recovery and reuse of energy, thus greatly reducing the energy consumption of the elevator and meeting the requirements of sustainable development.

[0003] In the existing energy feedback module, it is integrally installed inside the inverter. When the inverter works, heat will be generated, and the heat generation of power devices is more obvious during energy feedback. Since the energy feedback module is integrated with the inverter, the heat is concentrated and the heat dissipation difficulty increases.

[0004] Therefore, those skilled in the art have proposed an elevator inverter with energy feedback to solve the problems raised in the background art. Content of the Utility Model

[0005] In order to solve the above technical problems, the utility model provides an elevator inverter with energy feedback to solve the problem that in the prior art, the energy feedback module is integrally installed inside the inverter, and due to the integration of the energy feedback module and the inverter, the heat is concentrated and the heat dissipation difficulty increases.

[0006] An elevator inverter with energy feedback includes a machine shell, an inverter module and an energy feedback module. A support member is provided on the inner wall of the machine shell. The energy feedback module is installed on the upper surface of the support member, the inverter module is installed inside the machine shell, and the energy feedback module is located above the inverter module. A ventilation assembly is provided on the side wall of the machine shell.

[0007] The ventilation assembly includes a side plate fixed to the side wall of the machine shell, a main heat dissipation grille provided on another side wall of the machine shell, a plurality of ventilation slots provided on the side plate, a plurality of first fans installed in the ventilation slots, a secondary heat dissipation grille opened at the top side of the side plate, and a plurality of second fans obliquely installed on the inner wall of the secondary heat dissipation grille.

[0008] Preferably, the side plate is a "Z"-shaped plate structure, and a communication groove is further provided on the inner wall of the side plate, and the communication groove is located between the ventilation slot and the secondary heat dissipation grille.

[0009] Preferably, a top cover is installed on the upper surface of the casing, a first connecting plate is fixedly connected to the upper surface of the side plate, a second connecting plate is fixedly connected to the upper surface of the casing, and the top cover is fixed to the first connecting plate and the second connecting plate respectively.

[0010] Preferably, a plurality of limiting holes are formed on the side wall of the first connecting plate, and a plurality of clamping plates are fixedly connected to the inner wall of the top cover, and the clamping plates are engaged with the limiting holes.

[0011] Preferably, a plurality of connection holes are formed on another inner wall of the top cover, and a plurality of positioning holes are formed on the side wall of the second connection plate, and the positions of the connection holes correspond to the positioning holes.

[0012] Preferably, a plurality of mounting holes are provided on the bottom surface of the casing, and side grooves are provided on both side walls of the casing.

[0013] Preferably, a grille support plate is installed on the upper surface of the support member, and the energy feedback module is installed on the upper surface of the grille support plate.

[0014] Compared with the prior art, the utility model has the following beneficial effects:

[0015] The utility model dissipates heat for the inverter as a whole and the energy feedback module respectively by setting up a ventilation component, and at the same time assists in extracting the heat from the gap between the two modules, thereby avoiding the situation where the heat inside the inverter is concentrated and difficult to discharge. It can effectively reduce the temperature of the equipment, ensure that the equipment operates within the normal operating temperature range, improve the stability and reliability of the equipment, and extend the service life of the equipment; the provision of a connecting groove further improves the heat dissipation efficiency, avoids the occurrence of heat dissipation dead corners, and ensures that the heat dissipation effect of the entire equipment is more uniform. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the left three-dimensional structure of the utility model;

[0017] Figure 2 It is a right view structural schematic diagram of the utility model;

[0018] Figure 3 for Figure 2 Schematic diagram of the AA section structure;

[0019] Figure 4 for Figure 3 A partial enlarged view of part B;

[0020] Figure 5 for Figure 3 A partial enlarged view of part C in the middle;

[0021] Figure 6 It is a schematic diagram of the right three-dimensional structure of the utility model;

[0022] Figure 7 It is a schematic diagram of the internal wind direction structure.

[0023] In the figure:

[0024] 1. Cabinet; 101. Inverter module; 102. Energy feedback module; 103. Main heat dissipation grille; 2. Mounting hole; 3. Ventilation slot; 4. First fan; 5. Side plate; 501. First connecting plate; 502. Limit hole; 6. Secondary heat dissipation grille; 7. Top cover; 701. Clamping plate; 702. Connecting hole; 8. Support member; 9. Grille support plate; 10. Second fan; 11. Communication groove; 12. Second connecting plate; 13. Positioning hole; 14. Side groove. Specific embodiments

[0025] The following further describes the embodiments of the present invention in detail with reference to the drawings and embodiments. The following embodiments are used to illustrate the present invention, but cannot be used to limit the scope of the present invention.

[0026] Embodiment 1: As shown in the attached Figure 1 to the attached Figure 7 figures: The present invention provides an elevator inverter with energy feedback, including a cabinet 1, an inverter module 101 and an energy feedback module 102. The inverter module 101 is composed of a rectification unit, an inversion unit, a control unit, a power supply and a power filter. The energy feedback module 102 is composed of a feedback circuit, a control circuit, a protection circuit and a communication interface. A support member 8 is provided on the inner wall of the cabinet 1. The energy feedback module 102 is installed on the upper surface of the support member 8. The inverter module 101 is installed in the cabinet 1. The energy feedback module 102 is located above the inverter module 101. The energy feedback module 102 and the inverter module 101 are separated by the support member 8 to form a ventilation space, so that the two modules can work relatively independently while working, and at the same time can work together to achieve the efficient operation of the elevator and the energy feedback function; A ventilation component is provided on the side wall of the cabinet 1. The ventilation component can dissipate heat from the overall inverter respectively, and can also independently dissipate heat from the energy feedback module 102. At the same time, it can assist in discharging the heat at the gap between the inverter and the energy feedback module 102, avoiding the situation where the heat inside the inverter is concentrated and difficult to discharge;

[0027] The ventilation component includes a side plate 5 fixed to the side wall of the cabinet 1, a main heat dissipation grille 103 arranged at the other side wall of the cabinet 1, a plurality of ventilation slots 3 arranged at the side plate 5, a plurality of first fans 4 installed at the ventilation slots 3, a secondary heat dissipation grille 6 opened at the top of the side of the side plate 5, and a plurality of second fans 10 obliquely installed on the inner wall of the secondary heat dissipation grille 6; by the cooperation of the first fans 4 and the main heat dissipation grille 103, forced air convection can be formed at the ventilation slots 3 for the frequency converter module 101, effectively dissipating heat from the frequency converter module 101; by the cooperation of the obliquely installed second fans 10 and the secondary heat dissipation grille 6, heat dissipation of the energy feedback module 102 can be directly carried out.

[0028] The side plate 5 is of a "Z" - shaped plate structure, and a communication slot 11 is further arranged at the inner wall of the side plate 5. The communication slot 11 is located between the ventilation slot 3 and the secondary heat dissipation grille 6; by arranging the communication slot 11, since the second fans 10 are obliquely installed, part of the air flow at the ventilation slot 3 enters the cabinet 1 through the communication slot 11 and is located below the energy feedback module 102, so as to more stably assist in heat dissipation at the gap between the frequency converter module 101 and the energy feedback module 102, thus avoiding heat dissipation dead - angles and improving the heat dissipation efficiency.

[0029] A top cover 7 is installed on the upper surface of the cabinet 1. The upper surface of the side plate 5 is fixedly connected with a first connecting plate 501, and the upper surface of the cabinet 1 is fixedly connected with a second connecting plate 12. The top cover 7 is fixed to the first connecting plate 501 and the second connecting plate 12 respectively.

[0030] A plurality of mounting holes 2 are arranged at the bottom surface of the cabinet 1, and side slots 14 are arranged on both side walls of the cabinet 1. Through the mounting holes 2, it is ensured that the machine body can be stably installed in the elevator machine room; by arranging the side slots 14, the ventilation effect on the side of the frequency converter is ensured.

[0031] A grille support plate 9 is installed on the upper surface of the support member 8, and the energy feedback module 102 is installed on the upper surface of the grille support plate 9. Due to the use of the grille support plate 9, heat dissipation at the bottom of the energy feedback module 102 and its circuit can be carried out smoothly, avoiding heat concentration.

[0032] As can be seen from the above, the first fans 4 are installed at the ventilation slots 3 of the side plate 5, and the main heat dissipation grille 103 is installed on the other side wall of the cabinet 1. When the frequency converter module 101 works and generates heat, the first fans 4 are started to generate air flow; the first fans 4 suck the external cold air into the cabinet 1 from the main heat dissipation grille 103. The cold air flows through the frequency converter module 101 under the action of pressure, exchanges heat with the heat - generating components, and the hot air after heat exchange is driven by the air flow generated by the first fans 4 and discharged from the cabinet 1 through the ventilation slots 3, thus realizing forced air convection heat dissipation for the frequency converter module 101.

[0033] The second fan 10 is obliquely installed on the inner wall of the secondary heat dissipation grille 6 at the top side of the side plate 5. When the energy feedback module 102 generates heat during operation, the second fan 10 starts. The second fan 10 sucks external cold air from the secondary heat dissipation grille 6 and directly blows it towards the energy feedback module 102. The cold air exchanges heat with the heat-generating components of the energy feedback module 102 and absorbs the heat. The hot air after heat exchange is discharged from the casing 1 under the action of the second fan 10, realizing direct heat dissipation of the energy feedback module 102.

[0034] Since the second fan 10 is obliquely installed, a certain negative pressure will be generated at the ventilation slot 3 during its operation. This causes some airflows at the ventilation slot 3 to enter the casing 1 through the communication slot 11. After entering the casing 1, this part of the airflows is located below the energy feedback module 102, providing auxiliary heat dissipation to the gap between the frequency converter module 101 and the energy feedback module 102, avoiding heat dissipation dead angles, and improving the overall heat dissipation efficiency.

[0035] Embodiment 2: On the basis of Embodiment 1, a number of limiting holes 502 are provided on the side wall of the first connecting plate 501, and a number of clamping plates 701 are fixedly connected to the inner wall of the top cover 7. The clamping plates 701 are engaged with the limiting holes 502.

[0036] A number of connecting holes 702 are provided on the other inner wall of the top cover 7, and a number of positioning holes 13 are provided on the side wall of the second connecting plate 12. The positions of the connecting holes 702 correspond to those of the positioning holes 13. By inserting the clamping plates 701 into the limiting holes 502, screws are installed at the connecting holes 702 and the positioning holes 13.

[0037] As can be seen from the above, since the equipment needs to be maintained regularly, by removing the screws at the connecting holes 702, and because the thickness of the limiting holes 502 is greater than that of the clamping plates 701, at this time, the top cover 7 can be tilted at a certain angle along the connecting holes 702 and the clamping plates 701, so as to smoothly extract the clamping plates 701 from the first connecting plate 501, realizing the rapid disassembly of the top cover 7. Without disassembling the whole machine, the energy feedback module 102 can be quickly maintained. By removing the connecting bolts between the grille support plate 9 and the support member 8, the energy feedback module 102 can be removed, and the frequency converter module 101 can be quickly maintained.

[0038] The embodiments of the present invention are given for the purpose of illustration and description. Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those of ordinary skill in the art can make changes, modifications, substitutions, and deformations to the above embodiments within the scope of the present invention.

[0039] In the description of the present utility model, the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of such features. The meaning of "a plurality" is two or more, unless otherwise specifically defined.

Claims

1. A frequency converter for elevators with energy feedback, characterized in that: It includes a housing (1), an inverter module (101) and an energy feedback module (102). A support member (8) is provided on the inner wall of the housing (1). The energy feedback module (102) is installed on the upper surface of the support member (8). The inverter module (101) is installed inside the housing (1). The energy feedback module (102) is located above the inverter module (101). A ventilation assembly is provided on the side wall of the housing (1). The ventilation assembly includes a side plate (5) fixed to the side wall of the housing (1), a main heat dissipation grille (103) provided on another side wall of the housing (1), a plurality of ventilation grooves (3) provided on the side plate (5), a plurality of first fans (4) installed in the ventilation grooves (3), a secondary heat dissipation grille (6) opened at the top of the side of the side plate (5), and a plurality of second fans (10) obliquely installed on the inner wall of the secondary heat dissipation grille (6).

2. The variable frequency drive for elevator with energy feedback according to claim 1, wherein: The side plate (5) is a "Z" - shaped plate structure. A communication groove (11) is further provided on the inner wall of the side plate (5), and the communication groove (11) is located between the ventilation groove (3) and the secondary heat dissipation grille (6).

3. The variable frequency drive for elevator with energy feedback according to claim 2, characterized in that: A top cover (7) is installed on the upper surface of the housing (1). The upper surface of the side plate (5) is fixedly connected with a first connecting plate (501). The upper surface of the housing (1) is fixedly connected with a second connecting plate (12). The top cover (7) is fixed to the first connecting plate (501) and the second connecting plate (12) respectively.

4. The frequency converter for elevator with energy feedback according to claim 3, characterized in that: A plurality of limiting holes (502) are opened on the side wall of the first connecting plate (501). A plurality of clamping plates (701) are fixedly connected to the inner wall of the top cover (7), and the clamping plates (701) are engaged with the limiting holes (502).

5. The frequency converter for elevator with energy feedback according to claim 4, characterized in that: A plurality of connecting holes (702) are opened on the other inner wall of the top cover (7). A plurality of positioning holes (13) are provided on the side wall of the second connecting plate (12), and the positions of the connecting holes (702) correspond to the positioning holes (13).

6. The frequency converter for elevator with energy feedback according to claim 1 or 5, characterized in that: A plurality of mounting holes (2) are provided on the bottom surface of the housing (1). Side grooves (14) are provided on both side walls of the housing (1).

7. The frequency converter for elevator with energy feedback according to claim 1, characterized in that: A grille support plate (9) is installed on the upper surface of the support member (8), and the energy feedback module (102) is installed on the upper surface of the grille support plate (9).

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