Frequency converter power cabinet with fan redundancy function

Abstract

The frequency converter power cabinet with the fan redundancy function comprises a cabinet body, a first fan and a second fan, the first fan and the second fan are arranged at the upper end of the cabinet body, the first fan and the second fan are standby for each other, and air outlets of the first fan and the second fan are respectively and fixedly provided with an air outlet pipeline; the device is characterized in that air duct non-return mechanisms are arranged on the air outlet pipelines, the air duct non-return mechanisms on the 1 # fan or the 2 # fan in the working state enable the air outlet pipelines where the air duct non-return mechanisms are located to be in an open state, and the air duct non-return mechanisms on the 1 # fan or the 2 # fan in the shutdown state enable the air outlet pipelines where the air duct non-return mechanisms are located to be in a closed state. According to the frequency converter power cabinet with the fan redundancy function, when the fan runs, the air duct non-return mechanism enables the air outlet pipeline where the fan is located to be closed, and when the fan stops, the air duct non-return mechanism enables the fan to be opened, so that outside air cannot enter the fan through the air outlet pipeline on the fan in a standby shutdown state, and the phenomenon of air short circuit is avoided.

Description

TECHNICAL FIELD

[0001] The utility model relates to a frequency converter power cabinet more specifically, especially relates to a frequency converter power cabinet with fan redundancy function. BACKGROUND

[0002] The inside of frequency converter power cabinet is mainly to place power unit, and the number of power unit is different according to the different rated capacity, and the number of power unit is also different. The power unit is concentratedly placed in the power cabinet, and the heat emitted by the power unit is concentrated together, and the heat dissipation problem of the power unit cannot be solved by relying on natural air cooling alone, at this time, forced air cooling measures need to be adopted, that is, air draft is carried out by using the fan, and the air flow speed in the equipment is improved to achieve the purpose of heat dissipation.

[0003] The top of the existing frequency converter power cabinet is usually provided with two or more fans, but the fan can only be started and stopped simultaneously, and cannot be used as a spare, so the fan redundancy cannot be realized. When one fan fails and stops during the operation of the power cabinet, the operation of the power cabinet needs to be stopped, which affects the normal operation of the on-site equipment. If the two heat dissipation fans on the existing power cabinet are designed as one for use and one as a spare, the standby fan side is not sealed, the running fan can suck air in reverse, forming air short circuit, and the heat dissipation amount cannot meet the requirements, causing the equipment temperature to be too high. SUMMARY

[0004] The utility model discloses a frequency converter power cabinet with fan redundancy function to overcome the shortcoming of the above technical problem.

[0005] The frequency converter power cabinet with fan redundancy function of the utility model, including the cabinet body and setting 1# fan and 2# fan on the upper end of the cabinet body, be provided with the power unit of the composition frequency converter in the cabinet body, 1# fan and 2# fan pass through air draft and make the air convection in the cabinet body to realize the heat dissipation of the power unit in the cabinet body, 1# fan and 2# fan are as a spare for each other, and the air outlet of 1# fan and 2# fan is all fixed with the air outlet pipe, its characterized in that: the air outlet pipe is provided with the air duct check mechanism that controls the opening and closing state of the air outlet pipe, and the air duct check mechanism on 1# fan or 2# fan in the working state makes the air outlet pipe where it is in the open state, and the air duct check mechanism on 1# fan or 2# fan in the stop state makes the air outlet pipe where it is in the closed state.

[0006] The frequency converter power cabinet with fan redundancy function of the utility model, the air duct check mechanism is composed of multiple louvers arranged in the air outlet pipe, the inner side of the louver is the pipe inner chamber that communicates with the air outlet of 1# fan or 2# fan, the outer side of the louver is the pipe outer chamber that communicates with the outside, and the both ends of the louver are rotatably fixed on the side wall of the air outlet pipe through the pivot.

[0007] The frequency converter power cabinet with fan redundancy function has the advantages that the upper end of the cabinet body storing power units is provided with 1# fan and 2# fan which are used as backup for each other, the air outlet pipeline of the two fans is provided with air duct non-return mechanism, when 1# fan or 2# fan operates, the air duct non-return mechanism makes the air outlet pipeline where the fan is located to be closed, when the fan stops operating, the air duct non-return mechanism makes the air duct where the fan is located to be opened, in this way, when 1# fan and 2# fan are in the state that one fan operates and one fan is used as backup, only the air duct non-return mechanism on the fan in the operating state is in the opened state, and the air duct non-return mechanism on the backup fan is in the closed state, in this way, under the air extraction of the fan, external air enters the cabinet through the air inlet, and the heat generated by the power unit in the working state is taken away, finally, the heat is discharged through the air outlet pipeline of the fan in the working state, the external air cannot enter through the air outlet pipeline of the fan in the backup shutdown state, the "air short circuit" is formed, the effective heat dissipation of the power unit in the frequency converter power cabinet is ensured, the effect that another fan is started when one fan fails is achieved, and the "air short circuit" phenomenon is avoided.

[0008] The frequency converter power cabinet with fan redundancy function has the advantages that the upper end of the cabinet body storing power units is provided with 1# fan and 2# fan which are used as backup for each other, the air outlet pipeline of the two fans is provided with air duct non-return mechanism, when 1# fan or 2# fan operates, the air duct non-return mechanism makes the air outlet pipeline where the fan is located to be closed, when the fan stops operating, the air duct non-return mechanism makes the air outlet pipeline where the fan is located to be opened, in this way, when 1# fan and 2# fan are in the state that one fan operates and one fan is used as backup, only the air duct non-return mechanism on the fan in the operating state is in the opened state, and the air duct non-return mechanism on the backup fan is in the closed state, in this way, under the air extraction of the fan, external air enters the cabinet through the air inlet, and the heat generated by the power unit in the working state is taken away, finally, the heat is discharged through the air outlet pipeline of the fan in the working state, the external air cannot enter through the air outlet pipeline of the fan in the backup shutdown state, the "air short circuit" is formed, the effective heat dissipation of the power unit in the frequency converter power cabinet is ensured, the effect that another fan is started when one fan fails is achieved, and the "air short circuit" phenomenon is avoided. BRIEF DESCRIPTION OF DRAWINGS

[0009] Figure 1 It is a perspective view of the frequency converter power cabinet with fan redundancy function of the utility model;

[0010] Figure 2 It is a front view of the air outlet pipeline in the utility model;

[0011] Figure 3 It is a top view of the air outlet pipeline in the utility model;

[0012] Figure 4 It is a perspective view of the air outlet pipeline in the utility model;

[0013] Figure 5 It is Figure 2 the sectional view of A-A section in the utility model;

[0014] Figure 6 It is a state diagram of the air duct non-return mechanism in the air outlet pipeline when the fan is in the working state in the utility model.

[0015] In the drawing: 1 cabinet body, 2 1# fan, 3 2# fan, 4 air outlet pipeline, 5 air duct non-return mechanism, 6 louver, 7 rotating shaft, 8 pipeline inner cavity, 9 pipeline outer cavity, 10 louver upper part, 11 louver lower part. DETAILED DESCRIPTION

[0016] The utility model will be further explained in connection with the drawings and embodiments.

[0017] As Figure 1 shown, the utility model discloses a frequency converter power cabinet with fan redundancy function's perspective view is given, the frequency converter power cabinet shown is by the cabinet 1 and sets up on the upper end of the cabinet 1 1# fan 2 and 2# fan 3 constitutes, the inside of the cabinet 1 is the cavity, and the inside cavity of the cabinet 1 is placed with the power unit that constitutes the frequency converter. The upper end of the cabinet 1 is provided with 1# fan 2 and 2# fan, and 1# fan 2 and 2# fan are mutual standby, that is, two fans are in working condition, and the other is in shutdown standby state. The air outlet of 1# fan 2 and 2# fan is provided with the air outlet pipeline 4, and the air outlet pipeline 4 is provided with the air duct check mechanism 5 for controlling its opening and closing state.

[0018] When 1# fan 2 or 2# fan is in working condition, the air duct check mechanism 5 on it makes the air outlet pipeline 4 be in the open state, and for the fan in shutdown standby state, the air duct check mechanism 5 on it makes the air outlet pipeline 4 be in the closed state, so that, mutual standby of two fans is realized, and the outside air can also be avoided to enter through the air outlet pipeline on the fan in shutdown standby, and " wind short circuit " phenomenon is formed.

[0019] As Figure 2 , Figure 3 and Figure 4 shown, the front view, top view and perspective view of the air outlet pipeline in the utility model are given respectively, Figure 5 the sectional view of A-A section in Figure 2 is given, the air duct check mechanism 5 shown is composed of multiple louvers 6 arranged in the air outlet pipeline 4, the inner side of the louver 6 is the pipeline inner cavity 8 communicated with the air outlet of the fan (1# fan 2 or 2# fan 3), and the outer side of the louver 6 is the pipeline outer cavity 9 communicated with the outside. The both ends of the louver 6 are arranged on the side wall of the air outlet pipeline 4 through the rotating shaft 7, and the rotating shaft 7 can rotate.

[0020] The louver 6 shown is divided into the louver upper part 10 located above the rotating shaft 7 and the louver lower part 11 located below the rotating shaft 7, and the distance between the adjacent two rotating shafts 7 is less than the sum of the height of the louver lower part 11 and the height of the louver upper part 10, so as to buckle the adjacent two louvers 6 together. The height of the louver lower part 11 is greater than the height of the louver upper part 10, so the mass of the louver lower part 11 is greater than the mass of the louver upper part 10, so that the moment of the gravity center of the louver lower part 11 to the axis of the rotating shaft 7 is greater than the moment of the gravity center of the louver upper part 10 to the axis of the rotating shaft 7.

[0021] Thus, under the action of gravity of the louver 6, two adjacent louvers 6 are buckled together when the louver 6 is not subjected to external force (i.e. not subjected to the air outlet pushing of the fan), so that the air outlet pipeline 4 is in a closed state. When the louver 6 is subjected to the air outlet pushing of the open fan, the louver 6 is rotated and opened, and the air outlet pipeline 4 is in an open state, as shown in Figure 6 The state diagram of the air outlet pipeline air duct non-return mechanism when the fan is in a working state in the utility model is shown.

[0022] As can be seen from the above, the frequency converter power cabinet with fan redundancy function has one fan in working state and the other in standby state in 1# fan and 2# fan during working, the louver 6 in the air outlet pipeline 4 of the fan in working state is rotated and opened under the air outlet pushing, while the louver 6 in the air outlet pipeline 4 of the fan in standby state is in a closed state, at this time, the external air can only enter through the air inlet on the cabinet body 1 to realize the heat dissipation of the power unit in the cabinet body 1, and cannot enter from the air outlet pipeline 4 of the standby fan, thus avoiding the occurrence of the "air short circuit" phenomenon. When the fan in working state fails, the standby fan is started to ensure the uninterrupted working of the frequency converter power cabinet.

Claims

1. A frequency converter power cabinet with fan redundancy function, comprising a cabinet body (1) and a No. 1 fan (2) and a No. 2 fan (3) arranged at the upper end of the cabinet body, the cabinet body is provided with power units constituting a frequency converter, the No. 1 fan and the No. 2 fan realize heat dissipation of the power units in the cabinet body by air convection caused by air extraction, the No. 1 fan and the No. 2 fan are standby for each other, and an air outlet pipe (4) is fixed on the air outlet of each of the No. 1 fan and the No. 2 fan; characterized in that: The air outlet pipe is provided with an air duct check mechanism (5) for controlling the opening and closing state of the air outlet pipe. The air duct check mechanism on the 1# fan or the 2# fan in the working state makes the air outlet pipe where it is located in the open state. The air duct check mechanism on the 1# fan or the 2# fan in the shutdown state makes the air outlet pipe where it is located in the closed state. ​ 2. The variable frequency drive power cabinet with fan redundancy according to claim 1, wherein: The air duct check mechanism (5) is composed of multiple louvers (6) arranged in the air outlet pipe (4). The inner side of the louver is a pipe inner cavity (8) communicating with the air outlet of the 1# fan (2) or the 2# fan (3). The outer side of the louver is a pipe outer cavity (9) communicating with the outside. The two ends of the louver are rotatably fixed to the side wall of the air outlet pipe through the rotating shaft (7).

3. The frequency converter power cabinet with fan redundancy according to claim 1 or 2, characterized in that: Each louver (6) is composed of a louver upper part (10) located at the upper part of the rotating shaft (7) and a louver lower part (11) located at the lower part of the rotating shaft. The height of the louver lower part is greater than the width of the louver upper part. The distance between the upper and lower adjacent rotating shafts (7) is less than the sum of the height of the louver upper part and the height of the louver lower part.

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