CN218386349U - Device for strengthening heat exchange of electrical control cabinet - Google Patents

Abstract

A device for enhancing heat exchange in an electrical control cabinet, comprising an outer wall of the cabinet, an inner wall of the cabinet, and a vent, the vent includes a large section of the vent and a small end of the vent, and the outer wall of the cabinet has a large section of the vent, The small end face of the air vent is arranged on the inner wall of the cabinet. This patent can meet the requirements of energy saving and environmental protection and improve heat exchange efficiency to a certain extent. Especially in special environments such as heat exchange stations, the device can maximize the heat exchange of electrical cabinets, and the cost is cheap, and the maintenance cost is low. meet interchangeability requirements. Fans with different powers and the device are arranged at the air inlet at the bottom of the electrical cabinet and the air outlet at the top of the cabinet.

Description

A device for enhancing heat exchange in electrical control cabinets

technical field

The invention relates to the technical field of heat exchange of electric control cabinets, in particular to a simple device for enhancing heat exchange of electric control cabinets.

Background technique

At present, most industrial electrical control cabinets use natural ventilation shells, heat-insulated shells, air conditioners installed on the top of the cabinets, and heat exchangers installed in the cabinets to solve the problem of heat exchange in the cabinets. The heat exchange fan of the electrical control cabinet in the power distribution room often works under high load for a long time, and the heat exchange fan burns out and affects the normal operation of the equipment. Especially in winter, the temperature of the electrical control cabinet is relatively high. After checking the data and data demonstration on the spot, it is found that the main reasons are as follows: first, the indoor ambient temperature is relatively warm, and there are many environmental factors such as heat radiation; In special industries such as inverters in winter, the operating load of inverters and other equipment in the cabinet is relatively large, which generates more heat. However, the heat exchange effect of the current general-purpose heat exchange fans is relatively limited, and the abnormal phenomenon that the temperature inside the cabinet is higher than the temperature outside the cabinet is prone to occur. In the daily inspection and maintenance work, it is found that the traditional fan cooling can meet the temperature control requirements in the normal production environment, but it cannot achieve the expected cooling effect when the dust concentration is too high and the ambient temperature is high.

In order to solve the above problems, it is planned to design a simple device for strengthening heat exchange of the control cabinet, which is installed at the air inlet and outlet of the heat exchange fan of the electrical control cabinet. The ambient air is blown into the cabinet with relatively high wind speed and large air volume, and at the same time, the hot air in the cabinet is discharged with relatively low wind speed and small air volume, forming a certain "positive pressure" effect in the cabinet. While solving the heat dissipation problem, prevent the dust on site from entering the control cabinet, and prevent the dust particles from causing harm to the electrical components in the cabinet. After theoretical analysis and preliminary on-site tests, the device can not only ensure the heat dissipation requirements in the electrical cabinet to a certain extent, but also save energy and protect the environment. It is also low in cost, low in safety risks, and easy to install.

Contents of the invention

The purpose of the present invention is to provide a simple cabinet device for enhancing heat exchange in the control cabinet, which can meet the requirements of energy saving and environmental protection and improve heat exchange efficiency to a certain extent, especially in special environments such as heat exchange stations. The device can realize the heat exchange of the electrical cabinet to the greatest extent, and is cheap to manufacture, low to maintain, and meets interchangeability requirements. Fans with different powers are arranged at the air inlet at the bottom of the electrical cabinet and the air outlet at the top of the cabinet (wherein, the fan power and the air inlet aperture of the air inlet are larger than the air outlet at the top) and the device.

The technical scheme of the present invention is as follows: a device for enhancing heat exchange in an electrical control cabinet, comprising the outer wall of the cabinet, the inner wall of the cabinet, and a vent, the vent includes a large section surface of the vent, a small end face of the vent, and on the outer wall of the cabinet There is a large section of the air vent, and a small end of the air vent is arranged on the inner wall of the cabinet.

The vent is a hyperbolic structure.

Part of the outer wall and inner wall of the cabinet adopts hollow cold plate interlayer.

Install the fan on the vent.

An air inlet device is installed on the air vent.

Remarkable effect of the present invention is:

(1) It is used for enhanced heat exchange of electrical control cabinets. This device solves the problem that the heat exchange of the fan in the special environment control cabinet is not timely and dust and other sundries enter the interior to affect the normal operation of the equipment, and also realizes energy saving and environmental protection, and reduces energy consumption;

(2) The device is low in cost, easy to install, meets interchangeability requirements, and reduces equipment maintenance costs;

(3) Improve equipment reliability. This device effectively improves the operation reliability of key equipment in special environments by setting a "positive pressure" heat exchange system in the cabinet.

Description of drawings

Accompanying drawing 1 is the device schematic diagram that is used for the enhanced heat exchange of electrical control cabinet;

Accompanying drawing 2 is the plane view of heat exchange device;

Accompanying drawing 3 is the side view of heat exchange device

Among the figure: 1 is the outer wall of the cabinet where the large end of the vent is located, 2 is the inner wall of the cabinet where the small end of the vent is located, 3 is the large section of the vent, 4 is the small end of the vent, and 5 is the vent.

Detailed ways

The technical solution of this patent will be further described in detail below in conjunction with specific embodiments.

A device for enhancing heat exchange in an electrical control cabinet, comprising a cabinet outer wall 1, a cabinet inner wall 2, and a vent 5, the vent 5 having a hyperbolic structure, including a large section of the vent 3, and a small end of the vent 4, The outer wall 1 of the cabinet has a large section surface 3 of the vent, and the inner wall 2 of the cabinet has a small end face 4 of the vent.

The outer wall 1 of the cabinet and the inner wall 2 of the cabinet are partially interlayered with hollow cold plates, and the air is used for secondary heat exchange.

A fan and an air inlet device are installed on the vent 5.

The main function of the vent is to ventilate, realize the "positive pressure" of the gas in the cabinet, and avoid the entry of dust and other dust while meeting the normal heat exchange requirements. According to the ideal gas equation of state;

PV = nRT

In the formula, P is the pressure, the unit is Pa, T is the absolute temperature of the system, the unit is K, R is the ideal gas constant, the unit is J/(mol.K), V is the gas volume, the unit is m3. A certain amount of gas is compressed. When the pressure inside and outside the cabinet is balanced, the temperature of the air will decrease after entering the cabinet. The cold air entering from the front of the cabinet will be discharged from the top of the cabinet with the hot air inside. The air inlet device is close to the rear wall panel, and the large port faces inward, and the air is compressed and discharged again, and this cycle forms a "positive pressure" heat exchange system

The utility model provides a new type of heat exchange device, which relates to the technical field of heat exchange equipment. The heat exchange device is a structural component of the air inlet and outlet of an electrical cabinet. The air inlet and outlet of the box are partially interlayered with a hollow cold plate, and air is used for secondary heating. heat exchange. Arrange the air inlet at the lower position of the front of the control cabinet, and install the fan and air inlet device with an interference fit. The fan at the bottom air inlet is close to the wall, and the large port of the air inlet faces the fan. When inside, a certain amount of air enters the channel, and the narrowing of the airflow channel can increase the gas velocity, which is helpful to increase the gas velocity, and forms a low-pressure area at the rear end of the narrow section, resulting in a certain adsorption effect.

Claims (5)

1. A device for enhancing heat exchange in an electrical control cabinet, characterized in that: it includes the outer wall of the cabinet (1), the inner wall of the cabinet (2), and the vent (5), and the vent (5) includes a large section of the vent Face (3), the small end face (4) of the air vent, the large section face (3) of the air vent is arranged on the cabinet outer wall (1), and the small end face (4) of the air vent is arranged on the cabinet inner wall (2). 2. A device for enhancing heat exchange in an electrical control cabinet according to claim 1, characterized in that: the ventilation opening (5) is a hyperbolic structure. 3. A device for enhancing heat exchange in electrical control cabinets according to claim 1, characterized in that: the outer wall (1) and the inner wall (2) of the cabinet are partially interlayered with hollow cold plates. 4. A device for enhancing heat exchange in an electrical control cabinet according to claim 1, characterized in that a fan is installed on the vent (5). 5. A device for enhancing heat exchange in an electrical control cabinet according to claim 4, characterized in that: an air inlet device is installed on the vent (5).

Images