CN210200495U - Frequency conversion transformer cooler - Google Patents

Abstract

The utility model discloses a frequency conversion transformer cooler, which is provided with a heat exchange substrate, wherein the heat exchange substrate is internally provided with a water inlet cavity and a water outlet cavity, the front surface of the heat exchange substrate is connected with four heat extraction interaction pipes, the four heat extraction interaction pipes are embedded into three groups of coils of a three-phase frequency conversion transformer, under the low-load working state, the heat generated by the frequency conversion transformer is guided into the heat exchange substrate through a U-shaped pipe and is radiated through a radiating rib, a cold source tank and a thermal induction switch are arranged on one side of the heat exchange substrate, the cold source tank is respectively connected with the water inlet cavity and the water outlet cavity through a water inlet pipe and a water return pipe in a conduction way, under the high-temperature state of the frequency conversion transformer, the thermal induction switch turns on a water pump, cooling liquid in the cold source tank is input into the water inlet cavity from the water inlet pipe and then, and cooling in real time according to the temperature, so that the variable frequency transformer works at constant temperature.

Description

Frequency conversion transformer cooler

Technical Field

The utility model relates to a cooler technical field specifically is a frequency conversion transformer cooler.

Background

The power grid is an important infrastructure related to national economy, is an important platform for optimal configuration of carriers and energy resources of power transmission, and particularly has more and more prominent effect along with the accelerated development of clean energy and the popularization and application of power grid intelligent technology; because the sequential energy and productivity in China are reversely distributed, and the energy production is far away from an electricity load center, in order to meet the ever-increasing electricity utilization requirement of economic and social development, more urgent requirements are provided for strengthening the interconnection and flexible control of a power grid and improving the capability of the power grid for optimizing and configuring energy resources; the frequency conversion transformer is developed under the background, and can play an active role in future power grid development in China; the variable frequency transformer is series-connection type flexible alternating current transmission system equipment and novel intelligent power grid equipment, has the functions of smoothly adjusting transmission power, inhibiting system low-frequency oscillation, adjusting system frequency and the like, can realize asynchronous interconnection among power grids with different frequencies, optimizes and adjusts the transmission power and distribution proportion of parallel transmission channels, is favorable for enhancing the interconnection transmission capacity of the power grids, improves the flexibility of power grid operation control and the safety and stability level of a power system, and can play an important role in constructing a strong, intelligent and efficient modern large power grid.

Any transformer can generate heat loss in the operation process, the frequency conversion transformer is no exception, a large amount of harmonic current and reactive current flow through the frequency conversion transformer, a large amount of heat can be generated in the operation process of the large-capacity frequency conversion transformer, the loss of the frequency conversion transformer with ten thousand volt-ampere is about five thousandth, electric energy with fifty volt-ampere can be converted into heat energy, the heat energy needs to be discharged in time, or refrigeration equipment needs to refrigerate the heat energy, and the normal working temperature of the frequency conversion transformer is ensured; the working environment and the working power of the variable frequency transformer are in an alternating state; in summer, because the external environment temperature is high and the heat dissipation is slow, or the frequency conversion transformer generates more heat in a full load state at a peak of power consumption, a strong refrigeration device is needed to refrigerate the frequency conversion transformer in the state, the external temperature is lower in winter, and a weak refrigeration device is needed to ensure the temperature stability of the frequency conversion transformer in a low load state of the frequency conversion transformer, so that a common refrigerator cannot adapt to the refrigeration requirement of the frequency conversion transformer, and how to refrigerate the frequency conversion transformer is one of the technical problems to be solved.

SUMMERY OF THE UTILITY MODEL

Technical problem to be solved

Not enough to prior art, the utility model provides a frequency conversion transformer cooler has solved current frequency conversion transformer and has issued the not smooth problem of heat dissipation that the heat difference caused under different operational environment and operating condition.

(II) technical scheme

In order to achieve the above object, the utility model provides a following technical scheme: the heat exchange base plate is a hollow rectangular plate body, the interior of the heat exchange base plate is divided into a water inlet cavity and a water outlet cavity, the front surface of the heat exchange base plate is in conduction connection with four rows of heat exchange pipes, the four rows of heat exchange pipes are parallel to each other, each row of heat exchange pipes comprises four U-shaped pipes, one end of each U-shaped pipe is in conduction connection with the water inlet cavity, the other end of each U-shaped pipe is in conduction connection with the water outlet cavity, the back surface of the heat exchange base plate is provided with ten rows of heat dissipation ribs, one side of the heat exchange base plate is provided with the cold source tank, the bottom end of the cold source tank is in conduction connection with the inlet of the water pump, the outlet of the water pump is in conduction connection with the water inlet cavity through a water inlet pipe, the top end of the cold source tank is in conduction connection with the reflux valve, a thermal switch is embedded in the heat dissipation rib, the input end of the thermal switch is electrically connected with the power supply, and the output end of the thermal switch is electrically connected with the electrical interface of the water pump.

Further optimizing this technical scheme, the heat exchange base plate comprises bottom plate and apron lock, wherein intake chamber with go out the water cavity and be located on the bottom plate, four rows of heat exchange pipe all run through the apron.

Further optimize this technical scheme, be equipped with the holder between four U-shaped pipe.

Further optimize this technical scheme, the bottom plate with the avris of apron passes through screw fixed connection, and the avris of the two presss from both sides has sealed the pad.

Further optimizing the technical scheme, the heat exchange base plate and the heat exchange pipe are made of aluminum alloy materials or copper alloy materials.

(III) advantageous effects

Compared with the prior art, the utility model provides a frequency conversion transformer cooler possesses following beneficial effect:

1. this novel frequency conversion transformer cooler, through setting up a heat exchange base plate, the mutual pipe of four heat extractions of heat exchange base plate openly turn-on connection, the mutual pipe of every heat extraction contains four U-shaped pipes, the one end turn-on connection intake antrum of every U-shaped pipe, every U-shaped pipe other end turn-on connection goes out the water cavity, the back of heat exchange base plate is equipped with ten rows of heat dissipation muscle, the mutual pipe of four heat extractions imbeds three phase frequency conversion transformer's three group's coil respectively in, every group coil avris all contacts the U-shaped pipe this moment, under low temperature state or under the low-load operating condition, three phase frequency conversion transformer will dispel the heat through the leading-in heat exchange base plate of U-shaped pipe in the heat that the during.

2. This novel frequency conversion transformer cooler is equipped with cold source jar and hot inductive switch in one side of heat exchange base plate, and cold source jar passes through inlet tube and wet return respectively turn on connection intake antrum and goes out the water cavity, and under frequency conversion transformer high temperature state, hot inductive switch opens the water pump, and the cooling liquid in the cold source jar enters into the water cavity then through four mutual pipes of heat extraction from the inlet tube input intake antrum under water pump drive, and the rethread wet return flows back to the cold source jar and realizes forced cooling.

Drawings

FIG. 1 is a schematic view of the subjective structure of the present invention;

FIG. 2 is a schematic view of the heat exchange base plate of the present invention;

fig. 3 is the side-cut structure schematic diagram of the utility model.

In the figure: 1. a heat exchange substrate; 2. a water inlet cavity; 3. a water outlet cavity; 4. a heat-exchange tube; 5. a U-shaped tube; 6. heat dissipation ribs; 7. a cold source tank; 8. a water pump; 9. a water inlet pipe; 10. a reflux valve; 11. a water return pipe; 12. a thermal induction switch; 13. a base plate; 14. a cover plate; 15. a holder; 16. and a gasket.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Referring to fig. 1-3, the present invention provides a technical solution of a frequency conversion transformer cooler: the heat exchange device comprises a heat exchange substrate 1, heat exchange tubes 4, a cold source tank 7, a water pump 8 and a reflux valve 10, wherein the heat exchange substrate 1 is a hollow rectangular plate body, the interior of the heat exchange substrate is divided into a water inlet cavity 2 and a water outlet cavity 3, the front surface of the heat exchange substrate 1 is in conduction connection with the four heat extraction tubes 4, the four heat extraction tubes 4 are mutually parallel, each heat extraction tube 4 comprises four U-shaped tubes 5, one end of each U-shaped tube 5 is in conduction connection with the water inlet cavity 2, the other end of each U-shaped tube is in conduction connection with the water outlet cavity 3, the back surface of the heat exchange substrate 1 is provided with ten rows of heat dissipation ribs 6, one side of the heat exchange substrate 1 is provided with the cold source tank 7, the cold source tank 7 is filled with cooling liquid, the bottom end of the cold source tank 7 is in conduction connection with an inlet of the water pump 8, the water pump, the reflux valve 10 is connected with the water outlet cavity 3 in a conduction way through a water return pipe 11, a thermal sensing switch 12 is embedded and installed on the heat dissipation rib 6, the thermal sensing switch 12 is a KDS9700 type temperature control switch, the temperature is opened when the temperature is higher than 70 ℃ and is closed when the temperature is lower than 70 ℃, the input end of the thermal sensing switch 12 is electrically connected with a power supply, the output end of the thermal sensing switch 12 is electrically connected with an electrical interface of the water pump 8, when the temperature on the heat exchange substrate 1 is higher than 70 ℃, the thermal switch 12 starts the water pump 8, the water pump 8 pumps the low-temperature cooling liquid in the cold source tank 7 into the water inlet cavity 2 through the water inlet pipe 9, and then reaches the water outlet cavity 3 through the four heat-extraction interaction pipes 4, in the process, the heat inside the variable frequency transformer is exchanged with the low-temperature cooling liquid to realize forced cooling, the load is closed when the temperature is lower than 70 ℃, and natural cooling is carried out only by the heat exchange tube 4 and the heat dissipation ribs 6.

Specifically, heat exchange base plate 1 comprises bottom plate 13 and the 14 locks of apron, wherein intake antrum 2 and play water cavity 3 are located bottom plate 13, four mutual pipes 4 of heat extraction all run through apron 14, so can simplify heat exchange base plate 1's production technology and manufacturing cost by a wide margin, be convenient for simultaneously inspect heat exchange base plate 1 and maintain, for example when intake antrum 2 or play water cavity 3 or the mutual pipe 4 of heat exchange take place to block up, only need to decompose heat exchange base plate 1, just can see the inside of above-mentioned part clearly, the washing of pertinence, the mediation, realize the purpose of quick maintenance.

Specifically, a retainer 16 is arranged between the four U-shaped tubes 5, and the retainer 16 can keep the U-shaped tubes 5 in each row on the same plane, so that the coil sides of the variable frequency transformer can be conveniently inserted to realize the cooling function.

Specifically, the sides of the bottom plate 13 and the cover plate 14 are fixedly connected by screws, and a gasket 15 is sandwiched between the sides of the bottom plate 13 and the cover plate 14, and the gasket 15 is used for sealing the joint of the bottom plate 13 and the cover plate 14, so that the coolant in the heat exchange substrate 1 is kept from leaking.

Specifically, heat exchange base plate 1, heat exchange tube 4 are made by aluminium alloy material or copper alloy material, and aluminium alloy material and copper alloy material have good heat conductivility, and the processing of being convenient for simultaneously can the order the utility model discloses make simply, be convenient for widely use.

When the three-phase frequency conversion transformer is used for cooling, the four heat extraction interaction pipes 4 are respectively embedded into three groups of coils of the three-phase frequency conversion transformer, the sides of each group of coils of the three-phase frequency conversion transformer are respectively contacted with the U-shaped pipe 5, after the three-phase frequency conversion transformer is started, the temperature on the heat exchange substrate 1 is lower than the starting temperature of the heat induction switch 12 in a low-temperature state or a low-load working state, the heat generated by the three-phase frequency conversion transformer during working is led into the heat exchange substrate 1 through the U-shaped pipes 5, the heat is conducted to the heat dissipation ribs 6 through the cooling liquid accumulated in the water inlet cavity 2 and the water outlet cavity 3 to dissipate heat, natural cooling is carried out, when the three-phase frequency conversion transformer is in a high-temperature environment or in a high-load state, the internal temperature of the three-phase frequency conversion transformer is, the water pump 8 pumps the low-temperature coolant in the cold source tank 7 into the water inlet cavity 2 through the water inlet pipe 9, and then reaches the water outlet cavity 3 through the four heat-extraction interaction pipes 4, so that the heat inside the frequency conversion transformer is exchanged with the low-temperature coolant in the process, and forced cooling is realized.

To sum up, the novel frequency conversion transformer cooler is reasonable in structure and good in cooling effect, a heat exchange substrate 1 is arranged, the front surface of the heat exchange substrate 1 is in conduction connection with four heat extraction interaction pipes 4, each heat extraction interaction pipe 4 comprises four U-shaped pipes 5, one end of each U-shaped pipe 5 is in conduction connection with a water inlet cavity 2, the other end of each U-shaped pipe 5 is in conduction connection with a water outlet cavity 3, ten rows of heat dissipation ribs 6 are arranged on the back surface of the heat exchange substrate 1, the four heat extraction interaction pipes 4 are respectively embedded into three groups of coils of a three-phase frequency conversion transformer, at the moment, the U-shaped pipes 5 are contacted with the sides of each group of coils, heat generated by the three-phase frequency conversion transformer in working can be guided into the heat exchange substrate 1 through the U-shaped pipes 5 in a low-temperature state or a low-load working state, and, meanwhile, a cold source tank 7 and a thermal induction switch 12 are arranged on one side of the heat exchange substrate 1, the cold source tank 7 is respectively connected with the water inlet cavity 2 and the water outlet cavity 3 in a conducting mode through a water inlet pipe 9 and a water return pipe 11, the water pump 8 is started through the thermal induction switch 12 in a high-temperature state of the frequency conversion transformer, cooling liquid in the cold source tank 7 is driven by the water pump 8 to be input into the water inlet cavity 2 from the water inlet pipe 9 and then enters the water outlet cavity 3 through the four heat-extraction interaction pipes 4, and then flows back to the cold source tank 7 through the water return pipe 11 to realize forced cooling, so that the temperature can be adjusted in.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims (5)

1. The utility model provides a frequency conversion transformer cooler, includes heat exchange base plate (1), heat exchange pipe (4), cold source jar (7), water pump (8) and reflux valve (10), its characterized in that: the heat exchange base plate (1) is a hollow rectangular plate body, the interior of the heat exchange base plate is divided into a water inlet cavity (2) and a water outlet cavity (3), the front surface of the heat exchange base plate (1) is in conduction connection with four rows of heat exchange pipes (4), the four rows of heat exchange pipes (4) are parallel to each other, each row of heat exchange pipes (4) comprises four U-shaped pipes (5), one end of each U-shaped pipe (5) is in conduction connection with the water inlet cavity (2), the other end of each U-shaped pipe is in conduction connection with the water outlet cavity (3), the back surface of the heat exchange base plate (1) is provided with ten rows of heat dissipation ribs (6), one side of the heat exchange base plate (1) is provided with the cold source tank (7), the bottom end of the cold source tank (7) is in conduction connection with an inlet of the water pump (8), an outlet of the water pump (8) is in conduction connection with the water inlet cavity (2) through, the backflow valve (10) is in conduction connection with the water outlet cavity (3) through the water return pipe (11), the heat dissipation rib (6) is provided with the heat sensing switch (12) in an embedded mode, the input end of the heat sensing switch (12) is electrically connected with the power supply, and the output end of the heat sensing switch (12) is electrically connected with the electrical interface of the water pump (8).

2. The inverter transformer cooler according to claim 1, wherein: the heat exchange base plate (1) is formed by buckling a bottom plate (13) and a cover plate (14), wherein the water inlet cavity (2) and the water outlet cavity (3) are positioned on the bottom plate (13), and the four rows of heat exchange pipes (4) penetrate through the cover plate (14).

3. The inverter transformer cooler according to claim 1, wherein: a retainer (15) is arranged between the four U-shaped pipes (5).

4. The inverter transformer cooler according to claim 2, wherein: the side edges of the bottom plate (13) and the cover plate (14) are fixedly connected through screws, and a sealing gasket (16) is clamped between the side edges of the bottom plate and the cover plate.

5. The inverter transformer cooler according to claim 1, wherein: the heat exchange base plate (1) and the heat exchange tube (4) are made of aluminum alloy materials or copper alloy materials.

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