Heat dissipation and dehumidification device of box-type transformer and box-type transformer comprising heat dissipation and dehumidification device

Abstract

The utility model relates to a heat dissipation and dehumidification device of a box-type transformer and the box-type transformer comprising the heat dissipation and dehumidification device. A ventilation opening is formed in the upper side of a low-voltage chamber of the box-type transformer, the heat dissipation and dehumidification device comprises a draught fan, and the draught fan is installed at the ventilation opening, electrically connected with a power source of the box-type transformer and used for taking away humidity and heat in the box-type transformer. And the fan is additionally arranged, so that humidity and heat in the box-type transformer can be conveniently taken away, the dehumidification and cooling effects are achieved, the phenomena of condensation and high temperature of the box-type transformer are reduced, and safe and stable operation of equipment is guaranteed.

Description

Technical Field

[0001] This utility model relates to the photovoltaic field, and more specifically, to a heat dissipation and dehumidification device for a box-type transformer and a box-type transformer including the device. Background Technology

[0002] A prefabricated transformer, or simply prefabricated transformer, consists of a high-voltage compartment, a transformer compartment, and a low-voltage compartment. The high-voltage compartment is the power supply side, typically containing 35 kV or 10 kV incoming lines, and includes a high-voltage busbar, circuit breakers or fuses, voltage transformers, surge arresters, etc. The transformer compartment contains transformers, which are the main equipment of the prefabricated transformer. The low-voltage compartment contains a low-voltage busbar, low-voltage circuit breakers, metering devices, surge arresters, etc., from which lines are drawn to supply power to users.

[0003] Centralized photovoltaic power station box-type transformers are placed outdoors for a long time. Due to weather and other factors, the inside of the box-type transformer is prone to high humidity and high temperature, resulting in condensation and high temperature phenomena, which are not conducive to the safe and stable operation of the box-type transformer equipment. Summary of the Invention

[0004] The technical problem this invention aims to solve is that condensation and high temperatures easily occur inside box-type transformers, which is detrimental to the safe and stable operation of box-type transformer equipment.

[0005] To solve the above-mentioned technical problems, according to one aspect of the present invention, a heat dissipation and dehumidification device for a box-type transformer is provided, wherein a ventilation opening is provided on the upper side of the low-voltage chamber of the box-type transformer, and the heat dissipation and dehumidification device includes a fan, which is installed at the ventilation opening and electrically connected to the power supply of the box-type transformer, for removing humidity and heat from the box-type transformer.

[0006] Preferably, the heat dissipation and dehumidification device further includes an air switch, an AC contactor, and a temperature and humidity controller. The fan, the AC contactor, and the air switch are connected in series, and the temperature and humidity controller is connected in parallel between the AC contactor and the air switch. The fan, the AC contactor, and the temperature and humidity controller form a fan control circuit for starting and stopping the fan. The air switch is connected to the AC contactor and is used to control the power supply or disconnection of the fan control circuit.

[0007] Preferably, the air switch is provided with an air switch contact and an air switch auxiliary contact; the air switch contact is in a normally closed state, the air switch auxiliary contact is in a normally open state, and the air switch auxiliary contact is closed when the air switch contact is open.

[0008] Preferably, the heat dissipation and dehumidification device further includes a temperature sensor and a humidity sensor, and the temperature sensor and the humidity sensor are connected in parallel at the input terminal of the temperature and humidity controller.

[0009] Furthermore, the temperature detection limit of the temperature sensor is 0°C to 50°C.

[0010] Furthermore, the humidity sensor has a humidity limit of 0 to 80%.

[0011] According to another aspect of the present invention, a box-type transformer is provided, which includes the above-described heat dissipation and dehumidification device, wherein the heat dissipation and dehumidification device is installed inside the box-type transformer.

[0012] Preferably, a protective cover is installed outside the vent, with the opening of the protective cover tilted downwards to prevent rainwater from entering.

[0013] Preferably, a filter screen is installed on the protective cover to prevent dust and small animals from entering.

[0014] Compared with the prior art, the heat dissipation and dehumidification device and box-type transformer provided by the embodiments of this utility model can achieve at least the following beneficial effects:

[0015] First, the addition of the fan facilitates the removal of humidity and heat from the box-type transformer, achieving dehumidification and cooling, reducing condensation and high temperature phenomena in the box-type transformer, and ensuring the safe and stable operation of the equipment.

[0016] Secondly, a fan control loop is formed by the fan, the AC contactor, and the temperature and humidity controller. The fan is automatically controlled to start and stop according to the temperature and humidity parameters, which not only dehumidifies and cools down but also saves energy, making it cost-effective.

[0017] Third, the opening of the protective cover faces downwards to prevent rainwater from entering. Attached Figure Description

[0018] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings of the embodiments will be briefly introduced below. Obviously, the drawings described below only involve some embodiments of this utility model, and are not intended to limit this utility model.

[0019] Figure 1 This embodiment provides a circuit connection diagram for a heat dissipation and dehumidification device for a box-type transformer.

[0020] Figure 2 This is a side view of a box-type transformer provided in this embodiment. Detailed Implementation

[0021] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the described embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0022] Unless otherwise defined, the technical or scientific terms used herein shall have the ordinary meaning as understood by one of ordinary skill in the art to which this invention pertains. The terms “first,” “second,” and similar terms used in this patent application specification and claims do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Similarly, the terms “an” or “a” and similar terms do not indicate a limitation of quantity, but rather indicate the presence of at least one.

[0023] This embodiment provides a heat dissipation and dehumidification device for a box-type transformer, including an air switch QF, an AC contactor KM, a temperature and humidity controller, and a fan. For specific circuit connections, please refer to [reference needed]. Figure 1 The fan, the AC contactor KM, and the air switch QF are connected in series, and a temperature and humidity controller is connected in parallel between the AC contactor KM and the air switch QF. The fan, the AC contactor KM, and the temperature and humidity controller form a fan control circuit for starting and stopping the fan. The air switch QF is connected to the AC contactor KM and is used to control the power supply or disconnection of the fan control circuit.

[0024] The heat dissipation and dehumidification device also includes a temperature sensor and a humidity sensor. The temperature sensor is used to detect the temperature inside the box-type transformer; the humidity sensor is used to detect the humidity inside the box-type transformer. The temperature detection limit of the temperature sensor is 0℃ to 50℃. The humidity limit of the humidity sensor is 0% to 80%.

[0025] The temperature and humidity controller includes eight terminals. The input terminals of the temperature and humidity controller are connected in parallel to the temperature sensor and the humidity sensor. The remaining terminals are connected to the coils A1 and A2 of the AC contactor KM, respectively.

[0026] The air switch is equipped with air switch contacts and air switch auxiliary contacts. The air switch contacts are normally closed, and the air switch auxiliary contacts are normally open. When the air switch contacts open, the air switch auxiliary contacts close. The AC contactor is equipped with normally open auxiliary contacts. When the temperature and humidity controller auxiliary contacts close, controlling the AC contactor KM to be energized, the AC contactor KM auxiliary contacts close, causing the fan to start. When the temperature and humidity controller auxiliary contacts open, controlling the AC contactor KM to be de-energized, the AC contactor KM auxiliary contacts open, causing the fan to stop.

[0027] The fan control circuit is powered by 220V AC. The fan control circuit specifically includes: the temperature and humidity controller, the AC contactor KM, and the fan. The temperature and humidity controller determines the limiting temperature and humidity based on the settings of the background database. In this embodiment, the limiting temperature is set to 50℃ and the limiting humidity is set to 80%.

[0028] When the temperature and humidity controller detects that the temperature inside the box-type inverter exceeds 50°C or the humidity exceeds 80%, the auxiliary contact of the temperature and humidity controller closes, controlling the AC contactor KM to be energized, and the fan starts; when the temperature and humidity controller detects that the temperature inside the box-type inverter is below 50°C or the humidity is below 80%, the auxiliary contact of the temperature and humidity controller opens, controlling the AC contactor KM to be de-energized, and the fan stops.

[0029] This embodiment also provides a box-type transformer 10, such as Figure 2 As shown. The box-type transformer 10 includes the aforementioned heat dissipation and dehumidification device, which is installed inside the box-type transformer 10, and the fan is electrically connected to the power supply of the box-type transformer.

[0030] Preferably, a ventilation opening 20 is provided above the side door of the low-voltage compartment of the box-type transformer, and a fan is installed in the ventilation opening 20 to remove humidity and heat from the box-type transformer.

[0031] Specifically, a ventilation opening 20 is provided on the upper side of the side door of the low-pressure maintenance room, and the fan is installed in the ventilation opening 20. A protective cover is installed on the outside of the ventilation opening 20, with the opening of the protective cover tilted downwards to prevent rainwater from entering. Preferably, a filter screen is installed on the protective cover to prevent dust and small animals from entering.

[0032] The working principle of the heat dissipation and dehumidification device is as follows: When the temperature and humidity controller detects that the temperature inside the box-type inverter exceeds 50℃ or the humidity exceeds 80%, the auxiliary contact of the temperature and humidity controller closes, controlling the AC contactor KM to be energized, and the fan starts, carrying away the humidity and heat inside the box-type transformer to achieve dehumidification and cooling, avoiding condensation and high temperature phenomena in the box-type transformer, and ensuring the safe and stable operation of the equipment; when the temperature and humidity controller detects that the temperature inside the box-type inverter is below 50℃ or the humidity is below 80%, the auxiliary contact of the temperature and humidity controller opens, controlling the AC contactor KM to be de-energized, and the fan stops, saving energy.

[0033] The aforementioned heat dissipation and dehumidification device is mainly an improvement on existing technology. A ventilation opening is opened on the upper side of the side door of the low-voltage maintenance room, and an axial flow fan is installed and electrically connected to the power supply. The fan removes humidity and heat from the box-type transformer. Further, an air switch QF, an AC contactor KM, and a temperature and humidity controller are added to form a fan control circuit, ensuring effectiveness while saving energy.

[0034] In practice, the aforementioned heat dissipation and dehumidification device has significantly reduced condensation and high temperature phenomena.

[0035] The above description is merely an exemplary embodiment of the present utility model and is not intended to limit the scope of protection of the present utility model. The scope of protection of the present utility model is determined by the appended claims.

Claims

1. A heat dissipation and dehumidification device for a box-type transformer, characterized in that, The box-type transformer has a ventilation opening on the upper side of the low-voltage compartment. The heat dissipation and dehumidification device includes a fan, which is installed at the ventilation opening and electrically connected to the power supply of the box-type transformer to remove humidity and heat from the box-type transformer.

2. The heat dissipation and dehumidification device according to claim 1, characterized in that, The heat dissipation and dehumidification device also includes an air switch, an AC contactor, and a temperature and humidity controller. The fan, the AC contactor, and the air switch are connected in series, and the temperature and humidity controller is connected in parallel between the AC contactor and the air switch. The fan, the AC contactor, and the temperature and humidity controller form a fan control circuit for starting and stopping the fan. The air switch is connected to the AC contactor and is used to control the power supply or disconnection of the fan control circuit.

3. The heat dissipation and dehumidification device according to claim 2, characterized in that, The air switch is provided with air switch contacts and air switch auxiliary contacts; the air switch contacts are in a normally closed state, the air switch auxiliary contacts are in a normally open state, and the air switch auxiliary contacts are closed when the air switch contacts are open.

4. The heat dissipation and dehumidification device according to claim 2, characterized in that, The heat dissipation and dehumidification device also includes a temperature sensor and a humidity sensor, and the temperature sensor and the humidity sensor are connected in parallel at the input terminal of the temperature and humidity controller.

5. The heat dissipation and dehumidification device according to claim 4, characterized in that, The temperature detection limit of the temperature sensor is 0°C to 50°C.

6. The heat dissipation and dehumidification device according to claim 4, characterized in that, The humidity sensor is limited to a humidity range of 0% to 80%.

7. A box-type transformer, characterized in that, It includes the heat dissipation and dehumidification device as described in any one of claims 1 to 6, wherein the heat dissipation and dehumidification device is installed inside the box-type transformer.

8. The box-type transformer according to claim 7, characterized in that, A protective cover is installed outside the ventilation opening, with the opening of the protective cover tilted downwards to prevent rainwater from entering.

9. The box-type transformer according to claim 8, characterized in that, The protective cover is equipped with a filter screen to prevent dust and small animals from entering.

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