Intelligent temperature control type low-voltage draw-out switch cabinet

Abstract

The invention provides an intelligent temperature control type low-voltage draw-out switch cabinet, which is applied to the technical field of low-voltage draw-out switch cabinets, and is characterized in that the intelligent temperature control type low-voltage draw-out switch cabinet comprises a cabinet body, a wiring cavity for wiring and a plurality of drawer grooves are arranged in the cabinet body, and electrical drawers are assembled in the plurality of drawer grooves in a draw-out manner; the controller is arranged on the cabinet body; the cold air system is controlled by the controller; a first temperature sensor is arranged in the wiring cavity, and a second temperature sensor is arranged in each drawer groove; when the temperature detected by the first temperature sensor and / or the second temperature sensor reaches or exceeds a threshold value, the controller controls the cold air system to supply cold air to the corresponding position; an air outlet is formed in the cabinet body; the intelligent temperature control switch cabinet has the technical effects that intelligent temperature control of different modules in the switch cabinet is realized through partitioned temperature monitoring and directional air supply control, local overheating is effectively prevented, and the service life of electrical components is prolonged.

Description

Technical Field

[0001] This invention relates to the field of low-voltage withdrawable switchgear technology, and in particular to an intelligent temperature-controlled low-voltage withdrawable switchgear. Background Technology

[0002] Low-voltage withdrawable switchgear is a common type of power distribution equipment. In low-voltage power supply systems, it is responsible for power control, protection, conversion and distribution. Each drawer is equipped with a large number of electrical components such as circuit breakers and contactors, which can be flexibly pulled out or inserted into the cabinet. Each drawer can independently control the power supply control of a device or system. This type of switchgear has strict environmental requirements, especially temperature requirements.

[0003] Existing low-voltage withdrawable switchgear typically has air inlets and outlets on the upper and lower sides of the cabinet. A fan guides the airflow, facilitating air exchange between the inside and outside of the cabinet. Since each drawer in a withdrawable switchgear is a relatively independent modular system, the heat generation efficiency of electrical components varies depending on the operating state. However, this existing ventilation method only provides overall ventilation and heat dissipation in withdrawable switchgear, failing to adequately ventilate individual drawers. This can easily lead to localized high temperatures as heat accumulates, damaging electrical components and causing other drawers to malfunction, thus affecting normal operation. Summary of the Invention

[0004] The purpose of this invention is to provide an intelligent temperature-controlled low-voltage withdrawable switch cabinet, the advantage of which is that it can individually control the cooling of each drawer.

[0005] To achieve the above and other related objectives, the present invention provides the following technical solution:

[0006] An intelligent temperature-controlled low-voltage withdrawable switch cabinet includes a cabinet body, the cabinet body having a wiring cavity for cable routing and several drawer slots, each of the drawer slots containing a pull-out electrical drawer; it also includes a controller mounted on the cabinet body and a cooling system controlled by the controller; a first temperature sensor is installed in the wiring cavity, and a second temperature sensor is installed in each drawer slot; when the first temperature sensor and / or the second temperature sensor detects that the temperature reaches or exceeds a threshold, the controller controls the cooling system to deliver cold air to the corresponding location;

[0007] The cabinet is equipped with an exhaust vent.

[0008] In one embodiment of the present invention, the cooling system includes an exhaust fan fixed to the top of the cabinet, a heat exchanger connected to the exhaust fan, and an air supply duct connected to the heat exchanger.

[0009] One end of the exhaust fan is connected to an exhaust pipe, and the other end is connected to a heat exchanger.

[0010] The air supply pipe includes a main air supply pipe fixed in the wiring trough and connected to the heat exchanger at one end, and several branch air supply pipes connected to the main air supply pipe. The opening of the main air supply pipe is located near the bottom of the wiring cavity.

[0011] Several of the aforementioned air supply branch pipes are connected to several drawer slots respectively.

[0012] In one embodiment of the present invention, each of the plurality of air supply branches is provided with a solenoid valve electrically connected to the controller and controlling the opening or closing of the air supply branch.

[0013] In one embodiment of the present invention, the exhaust vent is located at the top of the cabinet.

[0014] In one embodiment of the present invention, the cabinet body is provided with a plurality of heat dissipation holes to connect the wiring cavity with the drawer slot, and both the wiring cavity and the drawer slot are connected to the exhaust vent.

[0015] In one embodiment of the present invention, a protective cover is provided on the top of the cabinet, and the cooling system is disposed inside the protective cover.

[0016] In one embodiment of the present invention, a first inductive conductor is provided on the rear side wall of the electrical drawer, and a second inductive conductor is provided on the side wall of the drawer slot; the first inductive conductor and the second inductive conductor are in contact to achieve electrical connection, at which time the controller controls the opening or closing of the solenoid valve;

[0017] When the first sensing conductor and the second sensing conductor are separated, the controller controls the solenoid valve to be in the normally closed state.

[0018] In one embodiment of the present invention, the first inductive conductor and the second inductive conductor may be magnets.

[0019] As described above, the intelligent temperature-controlled low-voltage withdrawable switchgear of the present invention has the following beneficial effects:

[0020] 1. A first temperature sensor is used to detect the temperature inside the wiring cavity, and several second temperature sensors are used to detect the temperature inside each drawer slot respectively; thus, the temperature of different modules inside the switch cabinet can be monitored, thereby avoiding excessive local temperature inside the switch cabinet; the controller is used to control the cooling system. When the temperature detected by the first temperature sensor and / or the second temperature sensor reaches or exceeds the set threshold, the controller can control the cooling system to send cold air towards the corresponding high temperature position to achieve precise cooling and ensure the service life of electrical components inside the electrical drawer;

[0021] 2. Electrical drawers are generally pulled out for maintenance after power is off; however, if cold air is continuously supplied during maintenance, it will affect the accuracy of the maintenance. Through the cooperation of the first and second induction conductors, the electrical drawer is assembled in the drawer slot. The first and second induction conductors are in contact to achieve electrical connection. The controller controls the opening or closing of the solenoid valve. In this state, the electrical drawer can work normally. When the temperature inside the electrical drawer reaches or exceeds the threshold, the solenoid valve can open and send cold air into the drawer slot. When the temperature inside the drawer slot drops below the threshold, the solenoid valve closes and stops sending cold air.

[0022] When the electrical drawer is pulled out of the drawer slot, the first sensing conductor and the second sensing conductor separate. At this time, the controller keeps the solenoid valve in a normally closed state to prevent cold air from being sent into the drawer slot, which would affect the maintenance of the electrical drawer. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the overall structure of an embodiment of the present invention;

[0024] Figure 2 This is a schematic diagram of the drawer groove structure according to an embodiment of the present invention;

[0025] Figure 3 yes Figure 2 Enlarged diagram of part A in the middle;

[0026] Figure 4 This is a schematic diagram of the wiring channel according to an embodiment of the present invention;

[0027] Figure 5 This is a schematic diagram of the structure of the cooling system according to an embodiment of the present invention;

[0028] Figure 6 This is a schematic diagram of the structure of the electrical drawer according to an embodiment of the present invention.

[0029] Reference numerals in the attached diagram: 1. Cabinet; 11. Wiring cavity; 12. Drawer slot; 13. Electrical drawer; 2. Cooling system; 21. Exhaust fan; 22. Heat exchanger; 23. Air supply duct; 231. Main air supply duct; 232. Branch air supply duct; 24. Exhaust duct; 3. Exhaust vent; 4. Partition; 41. Heat dissipation hole; 5. Protective cover; 6. First induction conductor; 7. Second induction conductor. Detailed Implementation

[0030] The following specific embodiments illustrate the implementation of the present invention. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification.

[0031] Please see Figures 1 to 6It should be understood that the structures, proportions, sizes, etc., illustrated in the accompanying drawings are merely for illustrative purposes to aid those skilled in the art and to facilitate understanding and reading. They are not intended to limit the scope of the invention and therefore have no substantial technical significance. Any modifications to the structure, changes in proportions, or adjustments to size, without affecting the effectiveness and purpose of the invention, should still fall within the scope of the technical content disclosed in this invention. Furthermore, the terms such as "upper," "lower," "left," "right," "middle," and "one" used in this specification are merely for clarity and not intended to limit the scope of the invention. Changes or adjustments to their relative relationships, without substantially altering the technical content, should also be considered within the scope of the invention's implementation.

[0032] Example 1

[0033] Please see Figure 1 , Figure 2 and Figure 4 This invention provides an intelligent temperature-controlled low-voltage withdrawable switchgear, comprising a cabinet 1. The interior of the cabinet 1 is divided into a wiring cavity 11 and multiple drawer slots 12 by a partition 4. The wiring cavity 11 is used to lay power supply busbars and control lines. Each drawer slot 12 can be fitted with an electrical drawer 13, which is equipped with electrical components such as circuit breakers and contactors. The partition 4 is provided with several heat dissipation holes 41 to allow the wiring cavity 11 to communicate with the drawer slots 12.

[0034] The cabinet 1 has an exhaust vent 3 on its top, and the wiring cavity 11 and drawer slot 12 are both connected to the exhaust vent 3. The cabinet 1 is equipped with a controller (not shown in the figure) and a cooling system 2. In this embodiment, the controller can preferably be a programmable logic controller (PLC) or a microcontroller unit (MCU).

[0035] Please see Figure 4 and Figure 5 The cooling system 2 is located on the top of the cabinet 1. The cooling system 2 includes an exhaust fan 21, a heat exchanger 22, and an air supply duct 23. The exhaust fan 21 is fixed to the top of the cabinet 1 by a bracket, and its air inlet is connected to an exhaust duct 24, which leads to the external environment of the cabinet 1 to draw in ambient air. Since the exhaust port 3 is located on the top of the cabinet 1, the exhaust port draws the hot air discharged from the cabinet 1 back into the heat exchanger 22 for heat exchange, thereby reducing the emission of hot air and preventing the temperature of the external environment of the switch cabinet from rising. In order to protect the cooling system 2 from environmental factors such as dust and moisture, a protective cover 5 is also installed on the top of the cabinet 1 to cover the exhaust fan 21, heat exchanger 22, and other components.

[0036] The exhaust fan 21 has its outlet connected to the inlet of the heat exchanger 22. In this embodiment, the heat exchanger 22 can be a refrigeration plate heat exchanger 22 or a micro compressor refrigeration system for cooling the air. The air supply pipe 23 includes a main air supply pipe 231 and multiple branch air supply pipes 232. One end of the main air supply pipe 231 is connected to the outlet of the heat exchanger 22. Its pipe body is fixedly installed in the wiring cavity 11, and its outlet is set facing the bottom of the wiring cavity 11. Thus, the air supply pipe 23 can deliver cold air to the bottom of the wiring cavity 11. Since the exhaust port 3 is at the top of the cabinet 1, the cold air can pass through the entire wiring cavity 11 and then be discharged through the exhaust port 3, thereby fully cooling and dissipating heat in the wiring cavity 11.

[0037] Please see Figure 4 Each air supply branch pipe 232 has one end connected to the main air supply pipe 231 and the other end connected to a corresponding drawer slot 12; each air supply branch pipe 232 is equipped with a solenoid valve (not shown in the figure), and each solenoid valve is electrically connected to the controller and receives its opening and closing commands.

[0038] A first temperature sensor (not shown in the figure) is installed in the cable routing cavity 11 to monitor the temperature of the area where the cables are concentrated; a second temperature sensor (not shown in the figure) is installed on the inner wall of each drawer slot 12 to monitor the operating environment temperature of the corresponding electrical drawer 13; all temperature sensors are electrically connected to the controller and upload temperature data in real time.

[0039] Please see Figure 1 An exhaust vent 3 is provided at the top of the cabinet 1. In order to form an effective heat dissipation channel, multiple heat dissipation holes 41 are provided on the internal partition 4 of the cabinet 1, so that the wiring cavity 11 is connected to all the drawer slots 12, and both of these spaces are ultimately connected to the exhaust vent 3 at the top. By utilizing the principle of hot air rising, airflow circulation is promoted.

[0040] Please see Figure 3 and Figure 6 A first sensing conductor 6 is installed on the rear side wall of each electrical drawer 13, and a second sensing conductor 7 is installed at the corresponding position on the side wall of each drawer slot 12; the first sensing conductor 6 and the second sensing conductor 7 together constitute a position detection unit; when the electrical drawer 13 is fully pushed into the drawer slot 12, the first sensing conductor 6 and the second sensing conductor 7 come into contact (e.g., through magnetic attraction or physical contact), and this contact signal is transmitted to the controller, indicating that the drawer is in the "working position"; at this time, the controller can normally control the opening and closing of the solenoid valve on the air supply branch pipe 232;

[0041] When the electrical drawer 13 is pulled out for maintenance, the first sensing conductor 6 and the second sensing conductor 7 separate. The controller receives the "separation" signal and then controls the solenoid valve in that circuit to remain in a normally closed state. Even if the second temperature sensor in the drawer slot 12 detects a high temperature, no air will be supplied, thus ensuring the safety and accuracy of the maintenance operation. The first sensing conductor 6 and the second sensing conductor 7 can preferably be a pair of magnets that attract each other, or a contact limit switch can be used.

[0042] Please see Figure 3 and Figure 6 In this embodiment, a first inductive conductor 6 is installed at each of the four corners of the rear side wall of the electrical drawer 13, and a second inductive conductor 7 is also installed at the corresponding position at each of the four corners of the side wall of each drawer slot 12. In this embodiment, all four first inductive conductors 6 and second inductive conductors 7 need to be magnetically connected for the electrical drawer 13 to be in the "working position". If one of the four corresponding first inductive conductors 6 and second inductive conductors 7 is not magnetically connected, the electrical drawer 13 is in the "non-working position". In this state, the controller receives a "separation" signal and then controls the solenoid valve of that circuit to remain in the normally closed state, and the refrigeration system will not blow air.

[0043] Example 2

[0044] Brief description of the control process:

[0045] 1. System initialization: The controller is powered on, initializes each input and output port, reads the preset temperature threshold, and enables real-time monitoring of all temperature sensors.

[0046] 2. Temperature data acquisition and judgment: The controller cyclically acquires temperature data from the first temperature sensor and temperature data from each of the second temperature sensors;

[0047] Each collected temperature value is compared with a preset threshold.

[0048] 3. Cooling down decision-making and execution:

[0049] (1) Situation A: Overheating of wiring cavity 11

[0050] The controller starts the cooling system 2: turns on the exhaust fan 21 and heat exchanger 22; and delivers cold air to the bottom of the wiring cavity 11 through the air supply pipe 231; the cold air diffuses in the wiring cavity 11 and enters each drawer slot 12 through the heat dissipation hole 41, and finally the hot air is discharged from the top exhaust port 3.

[0051] (2) Situation B: Overheating of a single drawer slot 12

[0052] The controller first checks the status of the "position detection unit" of the corresponding electrical drawer 13 (i.e., whether the first sensing conductor 6 and the second sensing conductor 7 are in contact).

[0053] If the electrical drawer 13 is in the "working position" (in contact): the controller starts the cooling system 2 and opens the solenoid valve on the corresponding air supply branch pipe 232 to deliver cold air directionally into the overheated drawer slot 12;

[0054] If the drawer is in the "extracted for maintenance" position (disconnected): the controller keeps the solenoid valve closed and does not supply air to the empty drawer slot 12.

[0055] (3) Situation C: Multiple areas are overheated at the same time: The controller will perform the above operations in combination, start the cold air system 2, and open the air supply channels corresponding to all overheated areas.

[0056] 4. Conditions for stopping cooling:

[0057] When the temperature sensor in a certain area detects a temperature drop below a preset threshold, the controller closes the corresponding solenoid valve.

[0058] When the temperature in all areas is below the threshold and there is no need for cooling, the controller will turn off the exhaust fan 21 and heat exchanger 22 after a delay of a period of time (e.g., 5 minutes), and the entire cooling system 2 will stop working.

[0059] In summary, this invention achieves intelligent temperature control of different modules inside the switch cabinet through zoned temperature monitoring and directional air supply control, effectively preventing local overheating, extending the life of electrical components, and taking into account both maintenance safety and operational convenience.

[0060] The above embodiments are merely illustrative of the principles and effects of the present invention and are not intended to limit the invention. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in the present invention should still be covered by the claims of the present invention.

Claims

1. A smart temperature-controlled low-voltage withdrawable switch cabinet, comprising a cabinet body (1), wherein the cabinet body (1) is provided with a wiring cavity (11) for wiring and a plurality of drawer slots (12), wherein each of the plurality of drawer slots (12) is fitted with a pull-out electrical drawer (13); characterized in that: It also includes a controller installed on the cabinet (1) and a cooling system (2) controlled by the controller; a first temperature sensor is installed in the wiring cavity (11), and a second temperature sensor is installed in each drawer slot (12); when the first temperature sensor and / or the second temperature sensor detects that the temperature reaches or exceeds the threshold, the controller controls the cooling system (2) to send cold air toward the corresponding position. The cabinet (1) is equipped with an exhaust vent (3).

2. The intelligent temperature-controlled low-voltage withdrawable switchgear according to claim 1, characterized in that: The cooling system (2) includes an exhaust fan (21) fixed to the top of the cabinet (1), a heat exchanger (22) connected to the exhaust fan (21), and an air supply pipe (23) connected to the heat exchanger (22); The exhaust fan (21) is connected to an exhaust pipe (24) at one end and to a heat exchanger (22) at the other end; The air supply pipe (23) includes a main air supply pipe (231) fixed in the wiring trough and connected to the heat exchanger (22) at one end, and several branch air supply pipes (232) connected to the main air supply pipe (231). The opening of the main air supply pipe (231) is located near the bottom of the wiring cavity (11). Several of the aforementioned air supply branch pipes (232) are connected to several drawer slots (12).

3. The intelligent temperature-controlled low-voltage withdrawable switchgear according to claim 2, characterized in that: Each of the aforementioned air supply branch pipes (232) is equipped with a solenoid valve that is electrically connected to the controller and controls the opening or closing of the air supply branch pipe (232).

4. The intelligent temperature-controlled low-voltage withdrawable switchgear according to claim 2, characterized in that: The exhaust vent (3) is located at the top of the cabinet (1).

5. The intelligent temperature-controlled low-voltage withdrawable switchgear according to claim 4, characterized in that: The cabinet (1) is provided with several heat dissipation holes (41) so that the wiring cavity (11) and the drawer slot (12) are connected. Both the wiring cavity (11) and the drawer slot (12) are connected to the exhaust port (3).

6. The intelligent temperature-controlled low-voltage withdrawable switchgear according to claim 2, characterized in that: The cabinet (1) is equipped with a protective cover (5) on top, and the cooling system (2) is installed inside the protective cover (5).

7. The intelligent temperature-controlled low-voltage withdrawable switchgear according to claim 3, characterized in that: A first inductive conductor (6) is provided on the rear side wall of the electrical drawer (13), and a second inductive conductor (7) is provided on the side wall of the drawer slot (12); the first inductive conductor (6) and the second inductive conductor (7) are in contact to achieve electrical connection, and at this time the controller controls the opening or closing of the solenoid valve; When the first sensing conductor (6) and the second sensing conductor (7) are separated, the controller controls the solenoid valve to be in a normally closed state.

8. The intelligent temperature-controlled low-voltage withdrawable switchgear according to claim 7, characterized in that: The first inductive conductor (6) and the second inductive conductor (7) may be magnets.

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