A portable explosion-proof air conditioner for underground coal mines

Abstract

This utility model provides an integrated, portable, explosion-proof air conditioner for underground coal mines. Its explosion-proof outer shell is made of hot-dip galvanized sheet metal, and it is internally divided into a condensation chamber and an evaporation chamber. Each chamber is equipped with a fan and corresponding heat exchange components. The protective plate has heat dissipation openings and is covered with a stainless steel dustproof mesh. A dual-circulation system realizes cooling and refrigeration cycles respectively. The refrigerant circuit includes a liquid storage tank, a slanted plate piston compressor unit, etc. The air outlet structure has hot air and cold air outlets connected to a universal air outlet duct. A water collection box connected to a drainage pipe is located under the evaporator. This air conditioner has excellent explosion-proof and dustproof properties, high-efficiency cooling and ventilation, and good portability, making it suitable for the complex environment of underground coal mines.

Description

Technical Field

[0001] This utility model relates to the field of underground air conditioning equipment technology, and more specifically, to an integrated portable explosion-proof air conditioner for coal mines. Background Technology

[0002] In the underground working environment of coal mines, the presence of flammable and explosive gases such as methane and large amounts of dust places extremely high demands on the explosion-proof and dust-proof performance of air conditioning equipment. At the same time, the underground space is relatively narrow and complex, and the working environment is highly variable, requiring air conditioning equipment to have good mobility to meet the cooling needs of different working areas. However, existing underground coal mine air conditioning equipment has many shortcomings.

[0003] Traditional underground air conditioning equipment in coal mines is mostly bulky and complex in structure, making it difficult to move and install flexibly in the confined spaces underground, thus limiting its use in different work areas. Moreover, the explosion-proof design of these devices is not adequate, failing to effectively prevent gases such as methane from entering the equipment and causing explosions, posing a threat to the lives of underground workers.

[0004] Traditional equipment also performs poorly in dust control. Large amounts of dust underground easily adhere to critical components such as the heat exchanger of the air conditioner, affecting cooling efficiency and shortening equipment lifespan. Furthermore, the cooling and ventilation functions of traditional equipment are relatively limited, making it difficult to meet the complex and ever-changing environmental demands of underground coal mines; for example, it cannot flexibly adjust according to the temperature and humidity of different areas. Utility Model Content

[0005] Based on the above-mentioned technical problems, this utility model proposes an integrated portable explosion-proof air conditioner for underground coal mines.

[0006] A portable explosion-proof air conditioner for underground coal mines includes: The explosion-proof enclosure consists of a main frame and an outer protective plate, and is internally divided into a condensation chamber and an evaporation chamber. Dual circulation system: The condenser chamber is equipped with a condenser and a multi-blade fan, which is driven by an explosion-proof motor and is used for cooling air circulation; the evaporator chamber is equipped with an evaporator and a multi-blade fan, which is driven by an explosion-proof motor and is used for refrigeration circulation. Refrigerant circuit: The receiver tank stores the refrigerant, the reciprocating compressor unit is connected to the receiver tank, and the condenser and evaporator are connected through pipelines. An expansion valve is installed on the pipeline between the evaporator and the condenser. Air outlet structure: The top protective plate of the outer shell is equipped with a hot air outlet corresponding to the condenser chamber and a cold air outlet corresponding to the evaporator chamber. Both the hot air outlet and the cold air outlet are connected to a universal air outlet duct. Explosion-proof design: The outer shell is made of hot-dip galvanized sheet metal, and the hot air outlet, cold air outlet, and air inlet are all covered with stainless steel dustproof mesh.

[0007] Preferably, the protective plates of the condensing chamber and the evaporating chamber are provided with heat dissipation openings, which face the condenser and the evaporator, and are covered with stainless steel dustproof mesh on the outside.

[0008] Preferably, the piston compressor unit has a swashplate piston structure and is directly driven by an explosion-proof motor.

[0009] Preferably, both the hot air outlet and the cold air outlet are equipped with universal air outlet ducts.

[0010] Preferably, a water collection box is provided below the evaporator to collect the condensate on the surface of the evaporator, and the water collection box is connected to a drain pipe.

[0011] Beneficial effects: 1. Excellent explosion-proof and dustproof performance: The explosion-proof shell is made of hot-dip galvanized sheet metal parts combined with stainless steel dustproof mesh to form a reliable explosion-proof and dustproof barrier, effectively preventing flammable and explosive gases such as methane and dust from entering the equipment, ensuring the safety of underground operations and extending the service life of the equipment.

[0012] 2. Highly efficient cooling and ventilation functions: The dual-circulation system and optimized refrigerant circuit design enable the air conditioner to quickly and efficiently achieve cooling and ventilation, meeting the temperature and air circulation requirements of the complex underground environment, and improving the comfort and work efficiency of the workers.

[0013] 3. Excellent portability and applicability: The integrated design and universal air outlet duct make the air conditioner easy to move in the narrow spaces underground, and the air direction and air outlet position can be flexibly adjusted to meet the needs of different working areas. At the same time, the appropriate working voltage can be selected according to the underground power environment, enhancing the applicability of the equipment.

[0014] 4. Convenient maintenance and management: The design of the water collection box and drainage pipe facilitates the discharge of condensate, allows for regular rinsing of the heat exchanger surface, and enables direct water cleaning of the evaporator and condenser, making equipment maintenance and ensuring long-term stable operation. Attached Figure Description

[0015] Figure 1 A schematic diagram of the structure of this utility model is shown; In the attached diagram, 1 is the main frame, 2 is the protective plate, 3 is the condensing chamber, 4 is the evaporating chamber, 5 is the fan, 6 is the explosion-proof motor, 7 is the condenser, 8 is the evaporator, 9 is the liquid storage tank, 10 is the compressor unit, 11 is the heat dissipation opening, 12 is the hot air outlet, and 13 is the cold air outlet. Detailed Implementation

[0016] To better understand the above-mentioned objectives, features, and advantages of this utility model, the present utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0017] like Figure 1 The image shows an integrated portable explosion-proof air conditioner for underground coal mines, which consists of an explosion-proof shell, a dual circulation system, a refrigerant circuit, an air outlet structure, and an explosion-proof design.

[0018] The explosion-proof enclosure, consisting of a main frame 1 and an outer protective plate 2, is a crucial component ensuring the safe operation of the equipment underground. Internally, it is cleverly divided into a condenser chamber 3 and an evaporator chamber 4, providing independent working spaces for the dual-circulation system. The condenser chamber 3 houses the condenser 7 and the multi-blade fan 5, responsible for cooling the air circulation; the evaporator chamber 4 houses the evaporator 8 and the multi-blade fan 5, undertaking the refrigeration cycle. The enclosure is made of hot-dip galvanized sheet metal, a material with excellent corrosion resistance and strength, effectively resisting the harsh underground environment. In addition, the hot air outlet 12, cold air outlet 13, and air inlet (not shown) are all covered with stainless steel dustproof mesh, which not only prevents dust from entering the equipment, but also forms a primary explosion-proof barrier together with the outer shell to prevent flammable and explosive gases from entering and improve the explosion-proof performance of the equipment. Furthermore, heat dissipation openings 11 are opened on the protective plates 2 of the condenser chamber 3 and the evaporator chamber 4. The heat dissipation openings 11 are directly opposite the condenser 7 and the evaporator 8, and are also covered with stainless steel dustproof mesh on the outside, which not only ensures the heat dissipation requirements of the condenser 7 and the evaporator 8, but also further enhances the dustproof effect.

[0019] In addition, the device can be equipped with wheels on the underside of the explosion-proof housing to facilitate movement underground.

[0020] The dual-cycle system is the core component for achieving the air conditioning's cooling and ventilation functions. Inside the condenser chamber 3, the condenser 7 cools the high-temperature, high-pressure refrigerant gas into a normal-temperature, high-pressure liquid through heat exchange with the air. The multi-blade fan 5, driven by the explosion-proof motor 6, accelerates airflow, improves cooling efficiency, and achieves air circulation. Inside the evaporator chamber 4, the evaporator 8 causes the low-pressure refrigerant to evaporate and absorb heat, thereby achieving a cooling effect. The multi-blade fan 5, also driven by the explosion-proof motor 6, promotes airflow through the evaporator 8, transferring the cooling capacity to the surrounding environment and completing the cooling cycle. The two circulation systems work together to ensure that the air conditioner can operate efficiently and stably.

[0021] The refrigerant circuit is the key path to achieve refrigeration. The liquid receiver 9 is used to store refrigerant, providing a sufficient refrigerant source for the entire refrigeration process. The reciprocating compressor unit 10 is connected to the liquid receiver 9 and is directly driven by the explosion-proof motor 6. It adopts a slant-plate reciprocating structure, which has high compression efficiency and stability. The reciprocating compressor unit 10 compresses the low-temperature, low-pressure refrigerant gas into a high-temperature, high-pressure gas, which is then transported to the condenser 7 through pipelines. In the condenser 7, the refrigerant gas is cooled into a room-temperature, high-pressure liquid. Then, it enters the lower part of the evaporator 8 after being depressurized by the expansion valve at the bottom of the condenser 7. In the evaporator 8, the low-pressure refrigerant evaporates into gas, absorbing a large amount of heat to achieve refrigeration. Finally, the refrigerant gas re-enters the compressor through the suction pipe to complete a complete refrigeration cycle. This cycle repeats until the set temperature is reached and the compressor stops.

[0022] The air outlet structure provides hot and cold air to the underground working area. The protective plate 2 on the top of the outer shell is equipped with a hot air outlet 12 corresponding to the condensation chamber 3 and a cold air outlet 13 corresponding to the evaporation chamber 4. Both the hot air outlet 12 and the cold air outlet 13 are connected to universal air outlet pipes. The cold air outlet 13 can adjust the air direction through universal joints or be sent to the work position that needs cooling through the air duct to meet the cooling needs of different areas. The hot air outlet 12 can be connected to the exhaust system through the air duct to exhaust the hot air generated by condensation and maintain the circulation and temperature balance of the underground air.

[0023] A water collection box is installed below the evaporator 8 to collect condensate from the surface of the evaporator 8 caused by the condensation of water vapor in the air. The water collection box is connected to a drain pipe to drain the condensate out of the equipment in a timely manner, preventing water accumulation and damage. Furthermore, this device uses refrigerant R134a, which has excellent heat transfer performance and environmental adaptability, suitable for different working conditions in coal mines. However, charging and maintenance require professional technicians to ensure safe and correct operation. The compressor, refrigeration circulating fan 5 / cooling fan 5, etc., are all directly driven by explosion-proof motor 6. The operating voltage can be 660V or 1140V depending on the application scenario to meet the needs of different underground power environments. During equipment use, due to the high dust content underground, the heat exchanger surface should be cleaned regularly to ensure cooling effect. The design also considers the possibility of directly cleaning the evaporator 8 and condenser 7 with water; however, since both refrigeration and condensation are air-cooled, immersion in water is prohibited to ensure normal operation and service life of the equipment.

[0024] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. An integrated mobile explosion-proof air conditioner for underground coal mine, characterized in that, include: The explosion-proof shell is composed of a main frame (1) and an outer protective plate (2), and is internally divided into a condensation chamber (3) and an evaporation chamber (4). Dual circulation system: The condenser (3) is equipped with a condenser (7) and a multi-blade fan (5). The fan (5) is driven by an explosion-proof motor (6) and is used for cooling air circulation. The evaporator (4) is equipped with an evaporator (8) and a multi-blade fan (5). The fan (5) is driven by an explosion-proof motor (6) and is used for refrigeration circulation. Refrigerant circuit: The liquid receiver (9) stores the refrigerant, and the piston compressor unit (10) is connected to the liquid receiver (9). The condenser (7) and evaporator (8) are connected through the pipeline. An expansion valve is installed on the pipeline between the evaporator (8) and the condenser (7). Air outlet structure: The top plate (2) of the outer shell is provided with a hot air outlet (12) corresponding to the condenser (3) and a cold air outlet (13) corresponding to the evaporator (4). Both the hot air outlet (12) and the cold air outlet (13) are connected to a universal air outlet pipe. Explosion-proof design: The outer shell is made of hot-dip galvanized sheet metal parts, and the hot air outlet (12), cold air outlet (13) and air inlet are all covered with stainless steel dustproof mesh.

2. The integrated mobile explosion-proof air conditioner for underground coal mine according to claim 1, characterized in that, Heat dissipation openings (11) are provided on the protective plates (2) of the condensing chamber (3) and the evaporating chamber (4). The heat dissipation openings (11) are directly opposite the condenser (7) and the evaporator (8), and are covered with stainless steel dustproof mesh on the outside.

3. The integrated mobile explosion-proof air conditioner for underground coal mine according to claim 1, characterized in that, The piston compressor unit (10) has an inclined plate piston structure and is directly driven by an explosion-proof motor (6).

4. The integrated mobile explosion-proof air conditioner for underground coal mine of claim 1, wherein, Both the hot air outlet (12) and the cold air outlet (13) are equipped with universal air outlet pipes.

5. The integrated portable explosion-proof air conditioner for underground coal mines according to claim 1, characterized in that, A water collection box is provided below the evaporator (8) to collect the condensate on the surface of the evaporator (8), and the water collection box is connected to a drain pipe.

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