Cooling system for microwave heating drying furnace

Abstract

The utility model discloses a kind of cooling systems for microwave heating drying furnace, including plate heat exchanger, transformer oil outlet pipe, transformer oil return pipe, cold water delivery pipe and backwater pipe are installed on the plate heat exchanger, the oil outlet of the transformer oil return pipe is connected transformer circulating oil pump, and the water outlet of backwater pipe is connected cooling tower water supply pump, secondary refrigeration part is equipped on the transformer oil return pipe.This cooling system for microwave heating drying furnace adopts the double-stage cooling framework of plate heat exchanger main heat dissipation and semiconductor refrigeration auxiliary refrigeration, can satisfy the high-efficient, stable heat dissipation requirement required by transformer, can control transformer oil temperature within safety threshold, guarantee the play of microwave drying technology core advantage, help to improve production efficiency, convenient to use.

Description

Technical Field

[0001] This utility model relates to the field of rotary kiln refractory brick technology, specifically a cooling system for a microwave heating drying oven. Background Technology

[0002] In industries such as metallurgy and building materials, the linings of large equipment like rotary kilns typically use bulky, thick refractory bricks (usually greater than 100mm). Drying these bricks is a crucial process to remove moisture and prevent cracking or structural damage caused by rapid vaporization of moisture during high-temperature operation. Microwave drying technology utilizes the property of microwaves to penetrate materials and convert into heat internally, achieving rapid and uniform heating from the inside out. This significantly shortens the drying cycle (by several hours), reduces energy consumption, and effectively avoids brick cracking caused by uneven heating.

[0003] However, when the core component of a high-power microwave drying oven—the microwave generating module (especially its high-voltage transformer)—operates under continuous high load, internal losses (such as copper and iron losses) are converted into a large amount of heat, causing a sharp rise in transformer oil temperature. Currently, the mainstream cooling methods for such transformers mainly include air cooling and water cooling. However, a single cooling method (whether air or water cooling) will suffer from insufficient cooling efficiency and poor stability when facing the heat dissipation requirements of high-power, long-term operation of microwave drying oven transformers. It cannot reliably control the transformer oil temperature within a safe threshold, thus affecting production efficiency. Utility Model Content

[0004] The technical problem to be solved by this utility model is to overcome the existing defects and provide a cooling system for a microwave heating drying oven. The system adopts a two-stage cooling structure with plate heat exchanger as the main heat dissipation and semiconductor refrigeration as the auxiliary cooling. It can meet the high-efficiency and stable heat dissipation requirements of transformers, control the transformer oil temperature within a safe threshold, ensure the full play of the core advantages of microwave drying technology, help improve production efficiency, and is easy to use. It can effectively solve the problems in the background technology.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a cooling system for a microwave heating drying oven, comprising a plate heat exchanger, wherein a transformer oil outlet pipe, a transformer oil return pipe, a cold water delivery pipe and a return water pipe are installed on the plate heat exchanger, the oil outlet of the transformer oil return pipe is connected to a transformer circulating oil pump, and the water outlet of the return water pipe is connected to a cooling tower water supply pump, and a secondary cooling component is provided on the transformer oil return pipe.

[0006] As a preferred embodiment of this utility model, the secondary cooling component includes a transfer shell installed in the return oil pipe of the transformer. One side of the transfer shell is provided with a semiconductor cooling chip capable of cooling the internal cooling oil, and the heating surface of the semiconductor cooling chip is provided with heat sinks.

[0007] As a preferred technical solution of this utility model, the cold water delivery pipe is provided with a branch structure for heat dissipation of the heat sink. The branch structure includes a cold water branch pipe provided on the cold water delivery pipe, a heat dissipation water tank provided on the cold water branch pipe, and the fins of the heat sink are located inside the heat dissipation water tank. The heat dissipation water tank is provided with a return water branch pipe that is connected to the return water pipe.

[0008] As a preferred embodiment of this utility model, a flow control valve is provided on the cold water branch pipe.

[0009] As a preferred embodiment of this utility model, a check valve is provided on the return water branch pipe.

[0010] As a preferred embodiment of this utility model, a temperature measuring instrument is provided on the transformer oil return pipe, and the secondary refrigeration component is located between the temperature measuring instrument and the plate heat exchanger.

[0011] Compared with the prior art, the beneficial effects of this utility model are:

[0012] The cooling system for the microwave heating drying oven of this utility model adopts a two-stage cooling structure with plate heat exchanger as the main heat dissipation and semiconductor refrigeration as the auxiliary cooling. It can meet the high-efficiency and stable heat dissipation requirements of transformers, control the transformer oil temperature within a safe threshold, ensure the full play of the core advantages of microwave drying technology, help improve production efficiency, and is easy to use. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the structure of this utility model;

[0014] Figure 2 This is a schematic diagram of the left-side structure of this utility model;

[0015] Figure 3 This is a schematic diagram of the rear view structure of this utility model.

[0016] In the diagram: 1 Plate heat exchanger, 2 Transformer oil outlet pipe, 3 Transformer oil return pipe, 4 Cold water delivery pipe, 41 Return water pipe, 5 Transfer shell, 51 Semiconductor cooling chip, 52 Heat sink, 6 Cold water branch pipe, 61 Flow control valve, 62 Heat sink, 7 Return water branch pipe, 71 Check valve, 8 Temperature measuring instrument. Detailed Implementation

[0017] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0018] Please see Figure 1-3 This utility model provides a technical solution: a cooling system for a microwave heating drying oven, including a plate heat exchanger 1. The plate heat exchanger 1 is equipped with a transformer oil outlet pipe 2, a transformer oil return pipe 3, a cold water supply pipe 4, and a return water pipe 41. The oil outlet of the transformer oil return pipe 3 is connected to a transformer circulating oil pump, and the water outlet of the return water pipe 41 is connected to a cooling tower water supply pump. The transformer oil return pipe 3 is equipped with a secondary cooling component. Under the action of the circulating oil pump, the transformer oil inside the transformer passes sequentially through the transformer oil outlet pipe 2, the plate heat exchanger 1, and the transformer oil return pipe 3, before returning to the transformer. Water in the cooling tower pool is sequentially drawn by the water supply pump through the cold water supply pipe 4, the plate heat exchanger 1, and the return water pipe 41, and flows into the cold water pool after being cooled by the cooling tower. Under the action of the plate heat exchanger 1, the cooling water cools the transformer oil, thereby cooling the transformer.

[0019] Furthermore, the secondary cooling component includes a transfer shell 5 installed in the 3rd row of the transformer return oil pipe. A semiconductor cooling chip 51 capable of cooling the internal cooling oil is provided on one side of the transfer shell 5. The heating surface of the semiconductor cooling chip 51 is provided with heat sinks 52. The semiconductor cooling chip 51 is controlled to work, and the semiconductor cooling chip 51 cools the transformer oil flowing into the transformer tank, thereby reducing the oil temperature of the transformer oil.

[0020] Furthermore, the cold water supply pipe 4 is provided with a branch structure for dissipating heat from the heat sink 52. The branch structure includes a cold water branch pipe 6 provided on the cold water supply pipe 4, a heat dissipation tank 62 provided on the cold water branch pipe 6, and the fins of the heat sink 52 are located inside the heat dissipation tank 62. The heat dissipation tank 62 is provided with a return water branch pipe 7 connected to the return water pipe 41. The cold water branch pipe 6 is provided with a flow control valve 61. When the heat sink 52 dissipates heat from the semiconductor cooling chip 51, the flow control valve 61 is opened, and cooling water flows into the heat dissipation tank 62 through the cold water branch pipe 6, thereby cooling the heat sink 52.

[0021] Furthermore, a check valve 71 is provided on the return water branch pipe 7 to allow cooling water to flow in one direction on the return water branch pipe 7.

[0022] Furthermore, a temperature measuring instrument 8 is installed on the transformer oil return pipe 3, and the secondary cooling component is located between the temperature measuring instrument 8 and the plate heat exchanger 1. The temperature measuring instrument 8 can detect the oil temperature in the transformer oil return pipe 3.

[0023] The semiconductor cooling chip 51 and the thermometer 8 used in this invention are common electronic components in the prior art. Their working methods and circuit structures are well-known technologies and will not be described in detail here.

[0024] When using:

[0025] The transformer oil tank outlet of the microwave heating drying oven is connected to the heat source inlet of the plate heat exchanger 1 via the transformer oil outlet pipe 2. The transformer oil return pipe 3 is connected to the heat source outlet of the plate heat exchanger 1. The outlet of the transformer oil return pipe 3 is connected to the transformer circulating oil pump. The cold water delivery pipe 4 is connected to the cold source inlet of the plate heat exchanger 1. The inlet of the cold water delivery pipe 4 is connected to the cooling water tank of the cooling tower. The return water pipe 41 is connected to the cold source outlet of the plate heat exchanger 1. The outlet of the return water pipe 41 is connected to the cooling tower water supply pump.

[0026] Under the action of the circulating oil pump, the transformer oil inside the transformer passes through the transformer oil outlet pipe 2, plate heat exchanger 1, and transformer oil return pipe 3 in sequence, and then returns to the transformer.

[0027] The water in the cooling tower pool is drawn by the water supply pump through the cold water delivery pipe 4, plate heat exchanger 1, and return water pipe 41 in sequence, and flows into the cold water pool after being cooled by the cooling tower.

[0028] Under the action of plate heat exchanger 1, cooling water cools the transformer oil, thereby cooling the transformer;

[0029] When the microwave heating drying oven operates at high power or for a long time, the transformer oil temperature becomes too high. If the plate heat exchanger 1 alone cannot meet the cooling effect of the transformer oil, the thermometer 8 can detect that the temperature of the transformer oil return pipe 3 is too high. At this time, the semiconductor cooling chip 51 is controlled to work. The semiconductor cooling chip 51 cools the transformer oil flowing into the transformer oil tank, thereby reducing the temperature of the transformer oil.

[0030] When the heat sink 52 dissipates heat from the semiconductor cooling chip 51, the flow control valve 61 is opened, and cooling water flows into the heat dissipation tank 62 through the cold water branch pipe 6, thereby cooling the heat sink 52.

[0031] This utility model adopts a two-stage cooling structure with plate heat exchanger as the main heat dissipation and semiconductor refrigeration as the auxiliary cooling, which can meet the high-efficiency and stable heat dissipation requirements of transformers, control the transformer oil temperature within a safe threshold, ensure the full play of the core advantages of microwave drying technology, help improve production efficiency, and is easy to use.

[0032] The parts not disclosed in this utility model are all prior art, and their specific structures, materials, and working principles will not be described in detail. Although embodiments of this utility model have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of this utility model, the scope of which is defined by the appended claims and their equivalents.

Claims

1. Cooling system for a microwave heating oven, comprising a plate heat exchanger (1), characterized in that: The plate heat exchanger (1) is equipped with a transformer oil outlet pipe (2), a transformer oil return pipe (3), a cold water delivery pipe (4) and a return water pipe (41). The oil outlet of the transformer oil return pipe (3) is connected to the transformer circulating oil pump, and the water outlet of the return water pipe (41) is connected to the cooling tower water supply pump. The transformer oil return pipe (3) is equipped with a secondary refrigeration component.

2. The cooling system for microwave heating drying oven according to claim 1, characterized in that: The secondary cooling component includes a transfer shell (5) installed in the transformer return oil pipe (3). A semiconductor cooling chip (51) capable of cooling the internal cooling oil is provided on one side of the transfer shell (5). The heating surface of the semiconductor cooling chip (51) is provided with heat sinks (52).

3. The cooling system for a microwave heating drying oven according to claim 2, characterized in that: The cold water delivery pipe (4) is provided with a branch structure for dissipating heat from the heat sink (52). The branch structure includes a cold water branch pipe (6) provided on the cold water delivery pipe (4). A heat dissipation tank (62) is provided on the cold water branch pipe (6), and the fins of the heat sink (52) are located inside the heat dissipation tank (62). A return water branch pipe (7) connected to the return water pipe (41) is provided on the heat dissipation tank (62).

4. The cooling system for a microwave heating drying oven according to claim 3, characterized in that: The cold water branch pipe (6) is equipped with a flow control valve (61).

5. The cooling system for a microwave heating drying oven according to claim 3, characterized in that: The return water branch pipe (7) is equipped with a check valve (71).

6. The cooling system for a microwave heating drying oven according to claim 1, characterized in that: The transformer return oil pipe (3) is equipped with a thermometer (8), and the secondary refrigeration component is located between the thermometer (8) and the plate heat exchanger (1).

Images