Air-water cooling water source cooling unit

Abstract

The utility model discloses an oblique flow type air water cooling source cooling unit relates to high pressure frequency converter heat dissipation technical field, the inside fixed mounting of box body has shell and tube type condenser and compressor, the inner wall fixed mounting of box body has electric cabinet, the top fixed mounting of box body has the fan, the inner wall one side fixed mounting of box body has evaporimeter, fixed mounting has the oblique flow board in the air duct between fan and evaporimeter, install the expansion valve on the pipeline that shell and tube type condenser and evaporimeter communicate, and the air outlet is opened and communicated between box body and frequency converter chamber, and the device passes through efficient refrigeration system and air path design, effectively reduces the heat that high pressure frequency converter generates when operating, prevents indoor temperature too high, simultaneously, the indoor negative pressure that optimization's air pressure and air volume control reduced, avoids dust to be inhaled indoor, thereby protects electrical equipment from dust influence, prolongs equipment life.

Description

Technical Field

[0001] This utility model relates to the field of heat dissipation technology for high-voltage frequency converters, and in particular to a mixed-flow air-water cooling water source cooling unit. Background Technology

[0002] High-voltage frequency converters generate a lot of heat. When installed indoors, they often cause problems such as high temperature, high indoor negative pressure, and a lot of dust, which seriously affect the safe operation of high-voltage frequency converters.

[0003] Currently, electrical equipment in power rooms generates a significant amount of heat, and traditional direct ventilation cooling methods are commonly used. This method creates a large negative pressure indoors, making it easy for external dust to be drawn in, leading to equipment malfunctions and, in severe cases, even equipment burnout. For high-voltage frequency converters, the heat dissipation is even more significant, making the problems of increased indoor temperature, increased negative pressure, and increased dust even more prominent, seriously affecting the safe operation of high-voltage frequency converters. Utility Model Content

[0004] The purpose of this utility model is to solve the problem that the traditional ventilation direct exhaust cooling method leads to high indoor negative pressure and a lot of dust, which can easily cause electrical equipment failure and, in severe cases, burn out the equipment. Therefore, a diagonal flow air-water cooling water source cooling unit is proposed.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] The mixed-flow air-water cooled water source cooling unit has a shell-and-tube condenser and a compressor fixedly installed inside the housing. An electrical control box is fixedly installed on the inner wall of the housing. A fan is fixedly installed at the top of the housing. An evaporator is fixedly installed on one side of the inner wall of the housing. A baffle plate is fixedly installed in the air duct between the fan and the evaporator. An expansion valve is installed on the pipe connecting the shell-and-tube condenser and the evaporator. An air outlet is provided between the housing and the frequency converter chamber. A liquid level switch is fixedly installed at the bottom of the inner wall of the housing. An air guide duct is installed between the housing and the frequency converter chamber. An electric air valve is installed inside the air guide duct. A rainproof louver is installed on one side of the frequency converter chamber.

[0007] As a further description of the above technical solution:

[0008] The shell-and-tube condenser and the compressor are connected by a pipe, and a temperature detection probe is installed on the casing.

[0009] As a further description of the above technical solution:

[0010] An emergency exhaust port is connected to one side of the air duct, and the electric air valve is located at the emergency exhaust port. The electric air valve is initially in the closed state.

[0011] As a further description of the above technical solution:

[0012] An exhaust fan is installed between the frequency converter room and the air duct 11, and waterproof louvers are installed in the air outlet.

[0013] As a further description of the above technical solution:

[0014] The rainproof louvers are equipped with a fresh air filter, and the air outlet of the fan is connected to the inclined plate through an air duct.

[0015] As a further description of the above technical solution:

[0016] The electrical control box is connected to components such as the compressor, fan, electric air valve, liquid level switch, and temperature detection probe via electrical wiring.

[0017] In summary, due to the adoption of the above technical solution, the beneficial effects of this utility model are:

[0018] 1. This device effectively reduces the heat generated by the high-voltage frequency converter during operation through its efficient cooling system and airflow design, preventing excessively high indoor temperatures. Simultaneously, optimized air pressure and airflow control reduce indoor negative pressure, preventing dust from being drawn into the room, thus protecting electrical equipment from dust and extending its service life. During on-site installation, simply position the device, connect the power supply and necessary piping, and it can be quickly put into use, significantly reducing on-site installation workload and time, and improving installation efficiency.

[0019] 2. It features multiple cooling modes, including water cooling and air conditioning cooling. The air conditioning cooling temperature can be automatically adjusted within the range of 20-30℃ to adapt to different working environments and needs. Through the intelligent control system, users can operate remotely or locally, flexibly switching between working modes to achieve precise temperature control. A reasonable airflow design and efficient heat exchange reduce indoor temperature and decrease the failure rate of equipment due to overheating. Simultaneously, by increasing air pressure and optimizing airflow distribution, it balances indoor air pressure, reduces dust inhalation caused by negative pressure, and improves indoor environmental quality.

[0020] 3. The device is equipped with comprehensive fault detection and automatic emergency handling functions. In the event of water leakage, fan failure, low temperature, or other situations, it can automatically trigger corresponding emergency plans, such as stopping the operation of the faulty component, opening the backup air valve, and starting the electric heater. This ensures that the high-voltage frequency converter can still operate safely when the cooling system fails, avoiding equipment damage or production shutdown due to cooling interruption. A specially designed inclined plate structure effectively increases air pressure and ensures uniform airflow distribution in the air duct. This not only improves heat exchange efficiency and ensures a more uniform and stable cooling effect, but also reduces wind resistance and noise. Attached Figure Description

[0021] Figure 1An overall schematic diagram according to an embodiment of the present utility model is shown;

[0022] Figure 2 A front view of a cooling device provided according to an embodiment of the present invention is shown;

[0023] Figure 3 A side view of a cooling device according to an embodiment of the present invention is shown;

[0024] Figure 4 A top view of a cooling device provided according to an embodiment of the present invention is shown.

[0025] Legend:

[0026] 1. Shell and tube condenser; 2. Compressor; 3. Electrical control box; 4. Flow deflector; 5. Fan; 6. Evaporator; 7. Expansion valve; 8. Air outlet; 9. Liquid level switch; 10. Electric air valve; 11. Air duct; 12. Rainproof louvers. Detailed Implementation

[0027] 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 skilled in the art without creative effort are within the protection scope of the present utility model.

[0028] like Figures 1-4 As shown, the present invention provides a diagonal-flow air-water cooled water source cooling unit, in which a shell-and-tube condenser 1 and a compressor 2 are fixedly installed inside the casing. The shell-and-tube condenser 1 is used to dissipate heat from the high-temperature and high-pressure refrigerant vapor after compression by the compressor 2 to the external environment, thereby condensing it into a high-temperature and high-pressure liquid refrigerant. The condensed liquid refrigerant flows through a pipe to the expansion valve 7. The compressor 2 is the core component of the refrigeration system, responsible for compressing the refrigerant, which increases the pressure and temperature of the refrigerant R22 / R410A. The compressed high-temperature and high-pressure refrigerant vapor then enters the shell-and-tube condenser 1 for exothermic cooling.

[0029] An electrical control box 3 is fixedly installed on the inner wall of the housing. The electrical control box 3 is the control center of the entire cooling device. It is connected to the compressor 2, fan 5, electric air valve 10, liquid level switch 9, temperature detection probe and other components through electrical circuits. It can automatically control the operating status of each component according to the signals of each sensor and switch, so as to achieve precise control of the cooling device and emergency handling of faults. A fan 5 is fixedly installed on the top of the housing. The fan 5 is responsible for pressurizing the hot air generated by the high-voltage frequency converter so that it can enter the interior of the cooling device with sufficient pressure and flow. The air outlet of the fan 5 is connected to the inclined plate 4 through the air duct to ensure that the pressurized hot air can flow evenly and smoothly to the evaporator 6.

[0030] An evaporator 6 is fixedly installed on one side of the inner wall of the housing. The evaporator 6 is the place where the refrigerant absorbs heat and vaporizes. It is connected to the expansion valve 7 through a pipe and receives the low-temperature, low-pressure gas-liquid mixture of refrigerant after throttling. At the same time, the evaporator 6 works together with the fan 5 and the baffle plate 4 to make the pressurized and evenly distributed hot air flow over the surface of the evaporator 6 to achieve heat exchange, so that the hot air is cooled down and sent back to the inverter room. The baffle plate 4 is fixedly installed in the air duct between the fan 5 and the evaporator 6. The special design structure of the baffle plate 4 can increase the air pressure and make the air volume more evenly distributed in the air duct. The hot air treated by the baffle plate 4 can exchange heat with the refrigerant in the evaporator 6 more efficiently.

[0031] An expansion valve 7 is installed on the pipe connecting the shell-and-tube condenser 1 and the evaporator 6. The expansion valve 7 is a throttling device of the refrigeration system. It reduces the pressure of the high-temperature and high-pressure liquid refrigerant from the condenser, turning it into a low-temperature and low-pressure gas-liquid mixture, thus creating conditions for the refrigerant to absorb heat in the evaporator 6. An air outlet 8 is provided between the housing and the inverter chamber. The main function of the air outlet 8 is to send the cooled air, which has been processed by the cooling device, back to the inverter chamber to reduce the indoor temperature, solve the problems of high temperature, negative pressure and dust, and ensure the safe operation of the inverter.

[0032] A liquid level switch 9 is fixedly installed at the bottom of the inner wall of the enclosure to monitor the liquid level in the device in real time. If leakage or poor drainage causes the liquid level to rise abnormally, the liquid level switch 9 will immediately activate and send a signal to the electrical control box 3 to trigger the corresponding emergency handling procedure. A duct 11 is installed between the enclosure and the inverter room. An exhaust fan is installed between the inverter room and the duct 11. The duct 11 is a key component connecting the cooling device and the exhaust fan on the top of the high-voltage inverter cabinet. It collects the hot air discharged by the exhaust fan and guides it into the cooling device, connecting it to the internal piping system of the cooling device to form a complete air circulation.

[0033] The air duct 11 is equipped with an electric air valve 10. During normal operation, the electric air valve 10 is closed to ensure that the airflow inside the cooling device flows along a predetermined path. When the cooling device malfunctions, the electric air valve 10 will automatically open to allow hot air to be discharged from the emergency exhaust port, thus realizing the emergency exhaust function. A rainproof louver 12 is installed on one side of the inverter room. When the device is in emergency exhaust mode, outdoor ambient temperature air enters the room after being filtered through the fresh air filter port of the rainproof louver 12 for emergency cooling. This component is connected to the air intake system of the cooling device to ensure that clean and dry outdoor air can be introduced in emergency situations.

[0034] In more detail, the shell-and-tube condenser 1 and the compressor 2 are connected by a pipe. A temperature detection probe is installed on the housing. The main function of the temperature detection probe is to monitor the temperature of the environment where the cooling device is located in real time. When the cooling device stops running and the ambient temperature is below 5°C, the temperature detection probe will transmit the temperature signal to the electrical control box 3. After receiving the signal, the electrical control box 3 will automatically turn on the electric heating device to heat the water in the heat exchanger tubes to prevent the water from freezing and causing the pipes to crack.

[0035] In more detail, waterproof louvers are installed inside the air outlet 8. The main function of the waterproof louvers is to prevent water inside the cooling device from splashing into the inverter room and to protect the inverter from moisture. Specifically, when the cooled air is sent out from the air outlet 8, the waterproof louvers can effectively block the leakage of internal moisture, prevent moisture from entering the inverter room, and prevent moisture from affecting or damaging the normal operation of the inverter.

[0036] An emergency exhaust port is connected to one side of the air duct 11. An electric air valve 10 is located at the emergency exhaust port. In the initial state, the electric air valve 10 is closed. When the cooling device malfunctions, the electric air valve 10 will automatically open to allow hot air to be discharged from the emergency exhaust port, thus realizing the emergency exhaust function.

[0037] In more detail, the electrical control box 3 is equipped with wear balancing control logic and compressor 2 loading and unloading priority rules. When loading, compressor 2 with shorter running time is loaded first, and when unloading, compressor 2 with longer running time is unloaded first, so as to ensure that the running time of each compressor 2 in the system is basically the same.

[0038] In more detail, during emergency ventilation, the outdoor ambient temperature air enters the room after being filtered through the rainproof louver 12 fresh air filter port for emergency cooling.

[0039] In more detail, the cooling device has multiple functions that can be autonomously controlled, including water cooling and air conditioning cooling, and the air conditioning cooling temperature can be autonomously adjusted within the range of 20-30℃.

[0040] Working principle: The heat generated by the high-voltage frequency converter during operation is discharged through the exhaust fan on the top of its cabinet, forming high-temperature hot air. At this time, the discharged hot air is as high as 50 degrees Celsius. The exhaust fan collects this hot air and transports it to the air duct 11 of the cooling device through the air duct. The hot air enters the cooling device through the air duct 11. Inside the air duct 11, the electric air valve 10 is normally closed to ensure that the hot air flows along the predetermined path.

[0041] After the hot air enters the cooling device, it is pressurized by the fan 5. The pressure provided by the fan 5 allows the hot air to pass smoothly through the subsequent air duct and processing components. The pressurized hot air passes through the inclined plate 4, which increases the air pressure and makes the air volume evenly distributed in the air duct, thereby improving the heat exchange efficiency. The hot air after being processed by the inclined plate 4 enters the evaporator 6. The refrigerant in the evaporator 6 becomes a low-temperature, low-pressure gas-liquid mixture under the action of the expansion valve 7, which can absorb the heat in the hot air, thereby reducing the temperature of the hot air.

[0042] After absorbing heat, the refrigerant becomes a low-temperature, low-pressure gas, which is drawn into and compressed by the compressor 2, increasing its pressure and temperature to become a high-temperature, high-pressure gas. It then enters the shell-and-tube condenser 1, where it dissipates heat to the external environment and condenses into a high-temperature, high-pressure liquid refrigerant. It then passes through the expansion valve 7 for throttling and pressure reduction, preparing for the next round of heat absorption. The air cooled by the evaporator 6 is sent back to the inverter room through the air outlet 8 to reduce the indoor temperature, solve the problems of high temperature, negative pressure, and dust, and ensure the safe operation of the inverter.

[0043] When the device leaks water or has poor drainage, the level switch 9 will activate, the electrical control box 3 will issue an audible and visual alarm, stop the fan 5, and open the electric air valve 10 for emergency ventilation.

[0044] If the fan 5 malfunctions, the electrical control box 3 will also issue an audible and visual alarm, stop the fan 5, and open the electric air valve 10 for emergency ventilation.

[0045] When the ambient temperature is below 5℃ and the device stops operating, the temperature detection probe detects a low temperature signal, and the electrical control box 3 automatically turns on the electric heating device to prevent the water in the heat exchanger tubes from freezing.

[0046] If the device is in emergency ventilation mode, outdoor ambient temperature air enters the room after being filtered through the fresh air filter inlet of the rainproof louver 12 for emergency cooling.

[0047] The electrical control box 3 is equipped with wear equalization control logic and compressor 2 loading and unloading priority rules. When loading, compressor 2 with shorter running time is loaded first, and when unloading, compressor 2 with longer running time is unloaded first, to ensure that the running time of each compressor 2 is basically the same.

[0048] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A mixed-flow air-water cooled water source cooling unit, characterized in that, A shell-and-tube condenser (1) and a compressor (2) are fixedly installed inside the housing. An electrical control box (3) is fixedly installed on the inner wall of the housing. A fan (5) is fixedly installed on the top of the housing. An evaporator (6) is fixedly installed on one side of the inner wall of the housing. An inclined plate (4) is fixedly installed in the air duct between the fan (5) and the evaporator (6). An expansion valve (7) is installed on the pipe connecting the shell-and-tube condenser (1) and the evaporator (6). An air outlet (8) is opened between the housing and the inverter chamber. A liquid level switch (9) is fixedly installed at the bottom of the inner wall of the housing. A duct (11) is installed between the housing and the inverter chamber. An electric air valve (10) is installed inside the duct (11). A rainproof louver (12) is installed on one side of the inverter chamber.

2. The diagonal-flow air-water cooled water source cooling unit according to claim 1, characterized in that, The shell-and-tube condenser (1) and the compressor (2) are connected by a pipe, and a temperature detection probe is installed on the housing.

3. The diagonal-flow air-water cooled water source cooling unit according to claim 2, characterized in that, An emergency exhaust port is connected to one side of the air duct (11), and the electric air valve (10) is located at the emergency exhaust port. The electric air valve (10) is initially in the closed state.

4. The diagonal-flow air-water cooled water source cooling unit according to claim 3, characterized in that, An exhaust fan is installed between the inverter room and the air duct (11), and a waterproof louver is installed inside the air outlet (8).

5. The diagonal-flow air-water cooled water source cooling unit according to claim 4, characterized in that, The rainproof louver (12) is equipped with a fresh air filter, and the air outlet of the fan (5) is connected to the inclined plate (4) through the air duct.

6. The diagonal-flow air-water cooled water source cooling unit according to claim 1, characterized in that, The electrical control box (3) is connected to the compressor (2), fan (5), electric air valve (10), liquid level switch (9), temperature detection probe and other components via electrical circuits.

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