Mine laneway overall module type centralized refrigeration system and device

Abstract

The utility model relates to a mine laneway integral module type centralized refrigeration system and device, which comprises a high-temperature-level refrigeration unit, a low-temperature-level refrigeration unit and a power distribution control unit, and the low-temperature-level refrigeration unit comprises a first compressor, a first condensing heat exchanger, a first expansion valve and a first evaporation heat exchanger which are sequentially connected through pipelines. The high-temperature-stage refrigeration unit comprises a second compressor, a second condensation heat exchanger, a second expansion valve and a second evaporation heat exchanger which are sequentially connected through pipelines, the first evaporation heat exchanger and the second evaporation heat exchanger are arranged in the fresh air duct, and the first condensation heat exchanger and the second condensation heat exchanger are arranged in the ventilation air duct; a fresh air inlet, a cold air outlet and a first fan are arranged on the fresh air duct, and a ventilation air inlet, a hot air outlet and a second fan are arranged on the ventilation air duct. The system and the device provided by the utility model have the advantages of integral movable installation, simple system, easy adjustment under PLC control, small volume, short conveying distance and the like.

Description

Technical Field

[0001] The utility model relates to the technical field of mining heat damage control, in particular to an integral modular centralized refrigeration system for a mine tunnel. Background Art

[0002] Coal mining depths in my country are increasing at a rate of 8-12 meters per year, with eastern mines experiencing an even greater rate of 100-250 meters every decade. Heat damage is becoming increasingly serious in underground working environments, such as mine tunnels. High temperatures and high humidity underground pose significant risks to both personnel and equipment, significantly reducing production efficiency and increasing accident rates, posing a significant threat to worker health and mine safety. Refrigeration equipment has become a crucial technical support tool in combating mining heat damage.

[0003] However, traditional refrigeration equipment has numerous shortcomings when it comes to combating roadway heat damage. For example, decentralized refrigeration equipment is complex to install, inefficient, suffers from poor coordination between components, and is not adaptable to the unique conditions of roadways. Existing centralized cooling systems above ground are often bulky, complex in structure, require long transmission distances, and suffer from significant cooling losses, making them difficult to efficiently install and operate within the limited space of roadways. Furthermore, there is a lack of flexible and effective response mechanisms to the complex and ever-changing heat damage conditions in roadways, and maintenance and investment costs are high.

[0004] Therefore, an integrated modular centralized cooling system specifically designed for tunnel heat damage control is needed to solve these problems. Utility Model Content

[0005] The purpose of this utility model is to address the problems of traditional heat damage control refrigeration units, such as large size, complex structure, long transportation distance, large cooling loss, low efficiency, poor coordination between components, and poor adaptability to the special environment of the tunnel. A mine tunnel integral modular centralized refrigeration system and device is proposed, the unit has an integral movable installation, a simple system, easy PLC control, small size, and short transportation distance, which can effectively solve the problems of traditional heat damage control refrigeration units.

[0006] To achieve the above-mentioned purpose, the present invention provides an integrated modular centralized refrigeration system for a mine tunnel, comprising a high-temperature refrigeration unit, a low-temperature refrigeration unit, and a power distribution control unit. The low-temperature refrigeration unit comprises a first compressor, a first condensing heat exchanger, a first expansion valve, and a first evaporative heat exchanger connected in sequence by pipelines. The high-temperature refrigeration unit comprises a second compressor, a second condensing heat exchanger, a second expansion valve, and a second evaporative heat exchanger connected in sequence by pipelines. The first evaporative heat exchanger and the second evaporative heat exchanger are arranged in the fresh air duct. The first condensing heat exchanger The first fan is used to control the flow of fresh air through the exhaust air inlet, the second evaporative heat exchanger, the first evaporative heat exchanger and the cold air outlet, and the second fan is used to control the flow of fresh air through the exhaust air inlet, the first condensing heat exchanger, the second condensing heat exchanger and the hot air outlet.

[0007] Preferably, the power distribution control unit adopts PLC programming control.

[0008] Furthermore, the utility model also provides an integrated modular centralized refrigeration device for a mine tunnel, comprising an outer protective structure unit of the unit and a heat pump refrigeration and thermal system, wherein the heat pump refrigeration and thermal system adopts the integrated modular centralized refrigeration system for the mine tunnel.

[0009] Based on the above technical solution, the advantages of the utility model are:

[0010] The modular centralized cooling system for mine tunnels provides centralized cooling for working areas within tunnels. Its key features include a simple and compact system. Its flexible installation and enhanced adaptability allow the refrigeration unit to adapt to tunnel environments of varying types and sizes. The system comprises a low-temperature refrigeration system and a high-temperature refrigeration system. The system is an integrated structure that connects directly to the air duct via a maintenance structure. The air duct delivers cool air to the tunnels requiring cooling and can be moved to meet cooling requirements.

[0011] Compared with traditional heat-damage refrigeration units, this unit has the following advantages:

[0012] 1. The unit system is simple and small in size, with flexible installation and stronger adaptability, allowing the refrigeration unit to adapt to tunnel environments of different types and sizes.

[0013] 2. The overall modular structure design simplifies the unit installation process, reduces the installation time and workload in the tunnel, and achieves efficient construction and low cost.

[0014] 3. The unit's refrigeration system is simple and can flexibly adjust the refrigeration capacity according to the degree of heat damage.

[0015] 4. The cold transmission distance is short, the cold loss is small, the heat exchange efficiency is high, the refrigeration energy efficiency is high, and there are good economic benefits.

[0016] 5. Step cooling, large heat exchange temperature difference.

[0017] 6. The PLC control system is used to monitor and maintain the unit in real time, discover potential faults in advance, reduce maintenance time and costs, and improve the reliability and service life of the unit. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of this application. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0019] Figure 1 This is the schematic diagram of the overall modular centralized refrigeration system for mine tunnels. DETAILED DESCRIPTION

[0020] The technical solution of the present invention is further described in detail below through the accompanying drawings and embodiments.

[0021] The utility model provides a modular centralized refrigeration system for mine tunnels, including a low-temperature refrigeration unit, a high-temperature refrigeration unit, and a power distribution control unit. Figure 1 As shown, a preferred embodiment of the present utility model is shown.

[0022] Specifically, the overall modular centralized refrigeration system of the mine tunnel includes a high-temperature refrigeration unit, a low-temperature refrigeration unit and a power distribution control unit. The low-temperature refrigeration unit includes a first compressor 1-1, a first condensing heat exchanger 2-1, a first expansion valve 3-1, and a first evaporative heat exchanger 4-1 connected in sequence by pipelines. The high-temperature refrigeration unit includes a second compressor 1-2, a second condensing heat exchanger 2-2, a second expansion valve 3-2, and a second evaporative heat exchanger 4-2 connected in sequence by pipelines. The first evaporative heat exchanger 4-1 and the second evaporative heat exchanger 4-2 are arranged in the fresh air duct 9-1, and the first condensing heat exchanger 2-1 and the second condensing heat exchanger 2-2 are arranged in the exhaust air duct 10-1. The fresh air duct 9-1 is provided with a fresh air inlet 5-1, a cold air outlet 6-1, and a first fan 11-1. The exhaust air duct 10-1 is provided with an exhaust air inlet 7-1, a hot air outlet 8-1, and a second fan 11-2.

[0023] The power distribution control unit controls the start and stop of the high-temperature refrigeration unit and the low-temperature refrigeration unit, and controls the fresh air to flow sequentially through the fresh air inlet 5-1, the second evaporative heat exchanger 4-2, the first evaporative heat exchanger 4-1, and the cold air outlet 6-1 by controlling the first fan 11-1, and controls the exhaust air to flow sequentially through the exhaust air inlet 7-1, the first condensing heat exchanger 2-1, the second condensing heat exchanger 2-2, and the hot air outlet 8-1 by controlling the second fan 11-2.

[0024] Preferably, the power distribution control unit is controlled by PLC programming. The power distribution control unit uses PLC to collect temperature signals, adjust the load of the unit according to the temperature in the tunnel and the set temperature, and has monitoring and early warning functions.

[0025] like Figure 1 As shown, the operating principle of the integrated modular centralized refrigeration system for mine tunnels of the present invention is as follows:

[0026] Low-temperature refrigeration system: The first compressor 1-1 starts to discharge the high-temperature and high-pressure gaseous refrigerant to the first condensing heat exchanger 2-1, and discharges the normal-temperature and high-pressure gas-liquid mixed refrigerant through the first condensing heat exchanger 2-1. The normal-temperature and high-pressure gas-liquid mixed refrigerant is throttled by the first expansion valve 3-1 and becomes a low-temperature and low-pressure gas-liquid mixed refrigerant. Then the low-temperature and low-pressure gas-liquid mixed refrigerant comes to the first evaporating heat exchanger 4-1 to evaporate and absorb heat to become a low-temperature and low-pressure gaseous refrigerant, and finally returns to the first compressor 1-1, completing a cycle of low-temperature refrigeration work.

[0027] High-temperature refrigeration system: The second compressor 1-2 starts to discharge the high-temperature and high-pressure gaseous refrigerant to the second condensing heat exchanger 2-2, and discharges the normal-temperature and high-pressure gas-liquid mixed refrigerant through the second condensing heat exchanger 2-2. The normal-temperature and high-pressure gas-liquid mixed refrigerant is throttled by the second expansion valve 3-2 and becomes a low-temperature and low-pressure gas-liquid mixed refrigerant. Then the low-temperature and low-pressure gas-liquid mixed refrigerant comes to the second evaporating heat exchanger 4-2 to evaporate and absorb heat to become a low-temperature and low-pressure gaseous refrigerant, and finally returns to the second compressor 1-2 to complete a cycle of high-temperature refrigeration.

[0028] Coordination of low-temperature refrigeration system and high-temperature refrigeration system:

[0029] This embodiment uses 36°C fresh air and 36°C exhaust air as examples. The power distribution control unit controls the first fan 11-1 to control the fresh air to flow sequentially through the fresh air inlet 5-1, the second evaporative heat exchanger 4-2, the first evaporative heat exchanger 4-1, and the cold air outlet 6-1. It also controls the second fan 11-2 to control the exhaust air to flow sequentially through the exhaust air inlet 7-1, the first condensing heat exchanger 2-1, the second condensing heat exchanger 2-2, and the hot air outlet 8-1.

[0030] Specifically, 36°C fresh air enters from the fresh air inlet 5-1, passes through the second evaporative heat exchanger 4-2 of the high-temperature refrigeration system to reduce the temperature of the air to 27°C, and then the 27°C air passes through the first evaporative heat exchanger 4-1 of the low-temperature refrigeration system to convert the 27°C air into 18°C cold air and is discharged from the cold air outlet 6-1; 36°C exhaust air enters from the first exhaust air inlet 7-1, passes through the first condensing heat exchanger 2-1 of the low-temperature refrigeration system to increase the temperature of the air to 45°C, and then the 45°C air passes through the second condensing heat exchanger 2-2 of the high-temperature refrigeration system to convert the 45°C air into 54°C hot air and is discharged from the hot air outlet 8-1.

[0031] The high-temperature refrigeration system changes the air temperature from 36°C to 27°C, and the low-temperature refrigeration system reduces the air temperature from 27°C to 18°C, turning it into cold air that circulates to the working face of the mine.

[0032] Furthermore, based on the above-mentioned integrated modular centralized refrigeration system for mine tunnels, the utility model also provides an integrated modular centralized refrigeration device for mine tunnels, including a unit peripheral protective structure unit and a heat pump refrigeration thermal system, and the heat pump refrigeration thermal system adopts the above-mentioned integrated modular centralized refrigeration system for mine tunnels.

[0033] The overall modular centralized refrigeration device for mine tunnels is an integral structure, which is directly connected to the air duct through the maintenance structure. The air duct can deliver cold air to the tunnels that need cooling for cooling, and can be moved according to the cooling location requirements of the tunnels.

[0034] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model and not to limit it; although the utility model has been described in detail with reference to the preferred embodiments, ordinary technicians in the field should understand that the specific implementation methods of the utility model can still be modified or some technical features can be replaced by equivalents; without departing from the spirit of the technical solution of the utility model, they should all be included in the scope of the technical solution for which protection is requested in the utility model.

Claims

1. A modular centralized refrigeration system for mine tunnels, characterized by: The invention comprises a high-temperature refrigeration unit, a low-temperature refrigeration unit and a power distribution control unit, wherein the low-temperature refrigeration unit comprises a first compressor (1-1), a first condensing heat exchanger (2-1), a first expansion valve (3-1), and a first evaporating heat exchanger (4-1) which are sequentially connected by pipelines, and the high-temperature refrigeration unit comprises a second compressor (1-2), a second condensing heat exchanger (2-2), a second expansion valve (3-2), and a second evaporating heat exchanger (4-2) which are sequentially connected by pipelines, wherein the first evaporating heat exchanger (4-1) and the second evaporating heat exchanger (4-2) are arranged in a fresh air duct (9-1), and the first condensing heat exchanger (2-1) and the second condensing heat exchanger (2-2) are arranged in an exhaust air duct (10-1). A fresh air inlet (5-1), a cold air outlet (6-1), and a first fan (11-1) are provided; an exhaust air inlet (7-1), a hot air outlet (8-1), and a second fan (11-2) are provided on the exhaust air duct (10-1); the power distribution control unit controls the start and stop of the high-temperature refrigeration unit and the low-temperature refrigeration unit, and controls the fresh air to flow sequentially through the fresh air inlet (5-1), the second evaporative heat exchanger (4-2), the first evaporative heat exchanger (4-1), and the cold air outlet (6-1) by controlling the first fan (11-1); and controls the exhaust air to flow sequentially through the exhaust air inlet (7-1), the first condensing heat exchanger (2-1), the second condensing heat exchanger (2-2), and the hot air outlet (8-1) by controlling the second fan (11-2).

2. The integrated modular centralized refrigeration system for mine tunnels according to claim 1, characterized in that: The power distribution control unit adopts PLC programming control.

3. A modular centralized refrigeration device for mine tunnels, characterized by: It includes an external protective structure unit of the unit and a heat pump refrigeration and thermal system, and the heat pump refrigeration and thermal system adopts the mine tunnel integral modular centralized refrigeration system as described in claim 1 or 2.

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