All fresh air anti-condensation circulating system for anti-explosion refrigeration house

Abstract

The utility model provides a full fresh air anti-condensation circulating system for an anti-explosion refrigeration house. Belongs to the technical field of refrigeration engineering. The all fresh air anti-condensation circulation system comprises a PLC (programmable logic controller), a refrigerating device, a fresh air device, an exhaust device, an air supply device, a defrosting air device and a heat exchanger. Wherein the fresh air inlet assembly is sequentially connected with the heat exchanger, the fresh air check valve and a fresh air inlet of the evaporation chamber through a fresh air pipe, and the superheater is located in the fresh air pipe connecting the heat exchanger and the fresh air check valve; an exhaust air outlet of the explosion-proof refrigeration house is sequentially connected with a first exhaust air check valve, an exhaust air fireproof valve, a heat exchanger, an exhaust air fan, a second exhaust air check valve and an exhaust air outlet assembly through an exhaust air pipe, and a subcooler is located in the exhaust air pipe. By means of the full fresh air design, the efficient heat exchange and supercooling technology, intelligent control and the like, the anti-condensation and anti-explosion safety problems in the anti-explosion refrigeration house are solved, and the energy efficiency level and the operation reliability of the system are remarkably improved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to refrigeration engineering technical field relates to a kind of for the full direct current new air anti-fogging circulation system of explosion-proof refrigerator. BACKGROUND

[0002] There are many explosive dangerous materials in chemical industry, spice, food processing and other industries, many of which need to be stored at low temperature, so explosion-proof refrigerator is needed. The current method of explosion-proof refrigerator is to use explosion-proof air cooler or aluminum pipe for evaporator in the warehouse. Although the motor of explosion-proof air cooler uses explosion-proof motor, but its return air is using the air in the warehouse. This way cannot meet the requirement of "the air in Class A and Class B plant should not be recycled" in national standard (GB50016-2014 "Building Design Fireproof Standard", 9.1.2), and the explosive material in the warehouse will gather on the fins of air cooler, which cannot be completely cleaned and has safety hazards. When aluminum pipe is used for high-temperature warehouse, condensate water is always produced in the warehouse, which causes the refrigerator to be unable to be used normally, which is unreasonable. Therefore, a cooling method for explosion-proof refrigerator is needed, which can avoid explosion risk and has wide adaptability. SUMMARY

[0003] The utility model aims at the above problems existing in prior art, and provides a new air anti-fogging circulation system for explosion-proof refrigerator.

[0004] The utility model can be realized by the following technical scheme: a new air anti-fogging circulation system for explosion-proof refrigerator, which comprises a PLC program controller, a refrigeration device, a fresh air device, an exhaust air device, a supply air device, a defrosting air device and a heat exchanger.

[0005] The refrigeration device comprises a condensing unit, a liquid accumulator, a supercooling device, an electromagnetic valve, an expansion valve, an evaporator and a superheater, and the evaporator is located in the evaporating chamber.

[0006] The fresh air device comprises a fresh air inlet assembly and a fresh air check valve.

[0007] The supply air device comprises a supply air fan, a supply air fireproof valve and a supply air check valve.

[0008] The exhaust air device comprises an exhaust air check valve one, an exhaust air fireproof valve, an exhaust air fan, an exhaust air check valve two and an exhaust air outlet assembly.

[0009] The fresh air inlet assembly is connected with the heat exchanger, the fresh air check valve and the fresh air inlet of the evaporating chamber in sequence through the fresh air pipe, and the superheater is located in the fresh air pipe connected with the heat exchanger and the fresh air check valve.

[0010] The cold air outlet of the evaporating chamber is connected with the supply air fan, the supply air fireproof valve, the supply air check valve and the cold air inlet of the explosion-proof refrigerator in sequence through the supply air pipe.

[0011] The exhaust outlet of the explosion-proof freezer is connected with an exhaust check valve, an exhaust fireproof valve, a heat exchanger, an exhaust fan, an exhaust check valve two and an exhaust outlet assembly in sequence through an exhaust pipe, and the supercooler is located inside the exhaust pipe;

[0012] The supercooler is placed in the exhaust pipe to utilize the cold energy of the exhaust air to cool the refrigerant supply liquid, so as to achieve the purpose of supercooling of the refrigerant; the superheater is placed in the fresh air pipe to utilize the heat of the fresh air to heat the refrigerant return gas, so as to avoid the generation of liquid strike of the compressor; the heat exchanger is arranged to utilize the cold energy of the exhaust air to precool the fresh air, so as to reduce the energy consumption of the refrigeration system and achieve the purpose of energy saving.

[0013] The defrosting air device comprises a defrosting fan and a defrosting air outlet assembly, and the defrosting fan is connected with the defrosting air inlet of the evaporating chamber through a defrosting air pipe.

[0014] In the refrigeration device, the condensing unit is connected with a liquid accumulator, a supercooler, an electromagnetic valve, an expansion valve and a refrigerant inlet of the evaporator in sequence through a refrigeration liquid supply pipe; and a refrigerant outlet of the evaporator is connected with the superheater and the condensing unit in sequence through a refrigeration return gas pipe.

[0015] The fresh air inlet assembly, the exhaust air outlet assembly and the defrosting air outlet assembly all comprise a filter and an isolator to prevent mice and insects from entering.

[0016] When the fresh air inlet of the fresh air device and the exhaust air outlet of the exhaust air device are arranged in space, the airflow path independence requirement is met, and the distance is far to prevent airflow disorder.

[0017] When the exhaust fan, the condensing unit, the defrosting fan and the air supply fan are located in the explosion-proof area of the explosion-proof freezer, the exhaust fan, the condensing unit, the defrosting fan and the air supply fan with explosion-proof function are adopted.

[0018] The condensing unit, the air supply fan, the exhaust fan, the defrosting fan and the electromagnetic valve are connected with a PLC program controller through a circuit.

[0019] The supercooler is specifically placed inside the exhaust pipe connected with the heat exchanger and the exhaust fan.

[0020] A defrosting air check valve is arranged at the defrosting air inlet of the evaporating chamber.

[0021] The outer walls of the air supply pipe, the exhaust pipe and the fresh air pipe are provided with thermal insulation layers.

[0022] An exhaust air filter is placed in the exhaust pipe connected with the exhaust air fireproof valve and the heat exchanger.

[0023] Compared with the prior art, the utility model has the following beneficial effects:

[0024] 1. Efficient fresh air circulation to improve air quality: With the all-new air design, it ensures that the air inside the explosion-proof freezer is always fresh, avoiding harmful gases or odors that may remain in the traditional circulation system. The cooled fresh air is directly used for cooling the freezer, completely avoiding the problem of air circulation, not only improving air quality, but also reducing the risk of cross contamination.

[0025] 2. Significant energy-saving effect: The heat exchanger uses the cold energy of the exhaust air to pre-cool the fresh air, reducing the temperature of the fresh air before entering the freezer, reducing the load of the refrigeration system. The supercooler further utilizes the cold energy of the exhaust air to reduce the supply liquid temperature of the refrigeration system, thereby increasing the refrigerating capacity, reducing the system configuration requirement, and improving the energy efficiency ratio. The combination of heat exchanger and supercooler greatly improves energy utilization and reduces energy waste, making it an effective energy-saving way.

[0026] 3. Air defrosting with high efficiency and energy saving: The system uses air defrosting, which introduces filtered air into the defrosting air outlet of the evaporator chamber through the defrosting fan, using air flow to remove the frost layer on the surface of the evaporator, reducing defrosting energy consumption, and avoiding temperature fluctuations in the freezer that may be caused by traditional defrosting methods, achieving a high-efficiency and energy-saving defrosting process.

[0027] 4. Optimizing the performance of the refrigeration system: The reasonable arrangement of the supercooler optimizes the flow state of the refrigerant, making the refrigeration system run more stably and efficiently, reducing the configuration requirement of the system, reducing the operating cost, and prolonging the service life of the equipment.

[0028] 5. Explosion-proof safety and intelligent control: The system is equipped with a supply air fire valve and an exhaust air fire valve that can cut off the air flow when a fire occurs to prevent the spread of fire. At the same time, the fan and device with explosion-proof function are used to ensure safe operation in the explosion-proof area. In addition, all equipment is controlled by PLC program controller to realize automatic control, which can automatically adjust the equipment operating state according to the temperature and humidity parameters in the freezer, improving the reliability of the system.

[0029] 6. Compact structure and reasonable layout: The layout design of each component of the system fully considers the independence of the air flow path, avoiding air cross contamination, and facilitating installation and maintenance.

[0030] 7. Dust filtration and temperature control: The new air inlet assembly and exhaust air outlet assembly are equipped with filters and isolators to effectively filter dust and impurities in the air, ensuring the cleanliness of the freezer. The outer wall of the supply air pipe, exhaust air pipe and fresh air pipe is provided with a thermal insulation layer to reduce heat loss and maintain the stability of the system operation.

[0031] In conclusion, the full fresh air anti-condensation circulating system for the explosion-proof cold storage has the advantages of new air design, high-efficiency heat exchange, supercooling technology, intelligent control and the like, solves the problems of anti-condensation and explosion-proof safety in the explosion-proof cold storage, significantly improves the energy efficiency level and operation reliability of the system, and is a high-efficiency, energy-saving, safe and practical solution. BRIEF DESCRIPTION OF DRAWINGS

[0032] Figure 1 FIG. 1 is a schematic diagram of a full fresh air anti-condensation circulating system for an explosion-proof cold storage according to a specific embodiment of the present application.

[0033] In Figure 1 , 1, explosion-proof cold storage; 2, condensing unit; 3, evaporating chamber; 4, heat exchanger; 5, air supply fan; 6, air exhaust fan; 7, air supply fireproof valve; 8, air supply check valve; 9, air exhaust check valve; 10, air exhaust fireproof valve; 11, air exhaust filtering device; 12, fresh air inlet assembly; 13, supercooler; 14, superheater; 15, air exhaust check valve two; 16, air exhaust outlet assembly; 17, expansion valve; 18, electromagnetic valve; 19, liquid accumulator; 20, air supply pipe; 21, air exhaust pipe; 22, fresh air pipe; 23, refrigeration liquid supply pipe; 24, refrigeration return pipe; 25, defrosting air fan; 26, defrosting air check valve; 27, defrosting air pipe; 28, defrosting air outlet assembly; 29, fresh air check valve. DETAILED DESCRIPTION

[0034] The following is a specific embodiment of the present application and further describes the technical solution of the present application in combination with the drawings, but the present application is not limited to these embodiments.

[0035] Embodiment 1

[0036] As Figure 1 shown, a full fresh air anti-condensation circulating system for an explosion-proof cold storage includes a PLC program controller, a refrigeration device, a fresh air device, an air exhaust device, an air supply device, a defrosting air device and a heat exchanger 4; the refrigeration device includes a condensing unit 2, a liquid accumulator 19, a supercooler 13, an electromagnetic valve 18, an expansion valve 17, an evaporator and a superheater 14; the evaporator is located in an evaporating chamber 3;

[0037] The fresh air device includes a fresh air inlet assembly 2 and a fresh air check valve 29;

[0038] The air supply device includes an air supply fan 5, an air supply fireproof valve 7 and an air supply check valve 8;

[0039] The air exhaust device includes an air exhaust check valve one 9, an air exhaust fireproof valve 10, an air exhaust fan 6, an air exhaust check valve two 15 and an air exhaust outlet assembly 16;

[0040] The fresh air inlet assembly 12 is connected to the heat exchanger 4, the fresh air check valve 29 and the fresh air inlet of the evaporating chamber 3 in sequence through the fresh air pipe 22; the superheater 14 is located inside the fresh air pipe 22 connecting the heat exchanger 4 and the fresh air check valve 29;

[0041] The cold air outlet of the evaporating chamber 3 is connected to the air supply fan 5, the air supply fireproof valve 7, the air supply check valve 8 and the cold air inlet of the explosion-proof freezer 1 in sequence through the air supply pipe 20;

[0042] The air exhaust outlet of the explosion-proof freezer 1 is connected to the air exhaust check valve 9, the air exhaust fireproof valve 10, the heat exchanger 4, the air exhaust fan 6, the air exhaust check valve 15 and the air exhaust outlet assembly 16 in sequence through the air exhaust pipe 21; the supercooler 13 is located inside the air exhaust pipe 21;

[0043] The defrosting air device comprises the defrosting air fan 25 and the defrosting air outlet assembly 28, and the defrosting air fan 25 is connected to the defrosting air outlet of the evaporating chamber 3 through the defrosting air pipe 27;

[0044] In the refrigeration device, the condensing unit 2 is connected to the liquid accumulator 19, the supercooler 13, the electromagnetic valve 18, the expansion valve 17 and the refrigerant inlet of the evaporator in sequence through the refrigeration liquid supply pipe 23; the refrigerant outlet of the evaporator is connected to the superheater 14 and the condensing unit 2 in sequence through the refrigeration return pipe 24;

[0045] The fresh air inlet assembly 12, the air exhaust outlet assembly 16 and the defrosting air outlet assembly 28 are each composed of a filter and an isolator;

[0046] For the air exhaust fan 6, the condensing unit 2, the defrosting air fan 25 and the air supply fan 5 used, when located in the explosion-proof area of the explosion-proof freezer 1, the air exhaust fan 6, the condensing unit 2, the defrosting air fan 25 and the air supply fan 5 with explosion-proof function are used;

[0047] The condensing unit 2, the air supply fan 5, the air exhaust fan 6, the defrosting air fan 25 and the electromagnetic valve 18 are connected to the PLC program controller through an electric circuit;

[0048] The supercooler 13 is specifically placed inside the air exhaust pipe 21 connecting the heat exchanger 4 and the air exhaust fan 6; the defrosting air check valve 26 is arranged at the defrosting air outlet of the evaporating chamber 3;

[0049] The outer walls of the air supply pipe 20, the air exhaust pipe 21 and the fresh air pipe 22 are each provided with a heat insulation layer;

[0050] The air exhaust filter 11 is placed inside the air exhaust pipe 21 connecting the air exhaust fireproof valve 10 and the heat exchanger 4.

[0051] Example 2

[0052] A kind of new air anti-condensation circulating system of refrigeration operation flow for explosion-proof refrigerator, using the new air anti-condensation circulating system in specific embodiment 1, operation flow is as follows:

[0053] Parameter is set by PLC program controller, refrigeration device is opened, defrosting fan 25 is closed, air supply fan 5 is opened, exhaust fan 6 is opened;New air passes through new air inlet assembly 12, new air pipe 22, heat exchanger 4, superheater 14, new air check valve 29 and enters evaporating chamber 3;New air exchanges heat with exhaust air at heat exchanger 4, and pre-cooling of new air is completed;Refrigerant is heated at superheater 14, and refrigerant return gas superheating is completed.New air enters evaporating chamber 3 and is cooled to air supply temperature under the action of refrigeration device.Low-temperature air in evaporating chamber 3 enters explosion-proof refrigerator 1 through air supply fan 5, air supply pipe 20, air supply fireproof valve 7, air supply check valve 8.

[0054] Higher temperature exhaust air in explosion-proof refrigerator 1 passes through exhaust air check valve 9, exhaust air fireproof valve 10, exhaust air pipe 21, exhaust air filter device 11, heat exchanger 4, supercooler 13, exhaust air fan 6, exhaust air check valve two 15 and exhaust air outlet assembly 16 and is discharged to a proper position.Exhaust air is cooled at supercooler 13, and refrigerant liquid supply supercooling is completed.

[0055] The system continuously circulates until explosion-proof refrigerator 1 is cooled to the set temperature.Temperature sensor is arranged in explosion-proof refrigerator 1, and temperature sensor is connected to PLC program controller through circuit.

[0056] Defrosting operation flow of the new air anti-condensation circulating system of explosion-proof refrigerator 1: when outdoor air temperature is high enough to meet defrosting demand, refrigeration device is closed, defrosting fan 25 is opened, air supply fan 5 is closed, and exhaust fan 6 is closed;Outdoor air enters evaporating chamber 3 through new air inlet assembly 12 and new air check valve 29, and high outdoor air temperature can melt evaporator frost, and evaporator defrosting is completed;Air is discharged to outdoor through defrosting air check valve 26, defrosting fan 25, defrosting air pipe 27 and defrosting air outlet assembly 28.

[0057] When outdoor air temperature is low and cannot undertake defrosting task, refrigeration device is closed, defrosting fan 25 is closed, air supply fan 5 is closed, and exhaust fan 6 is closed, and other defrosting modes (water defrosting, hot gas defrosting, etc.) are used for defrosting.

[0058] The specific embodiments described herein are merely illustrative of the spirit of the present application. Those skilled in the art to which the present application belongs can make various modifications or supplements to the described specific embodiments or use similar ways to replace, but will not deviate from the spirit of the present application or exceed the defined range.

Claims

1. A fresh air anti-fogging cycle system for an explosion-proof cold store, characterized in that, The new air anti-dew circulation system comprises a PLC program controller, a refrigeration device, a fresh air device, an exhaust air device, an air supply device, a defrosting air device and a heat exchanger; The refrigeration device comprises a condensing unit, a liquid accumulator, a supercooler, a solenoid valve, an expansion valve, an evaporator and a superheater, and the evaporator is located in an evaporating chamber; The fresh air device comprises a fresh air inlet assembly and a fresh air check valve; The air supply device comprises an air supply fan, an air supply fireproof valve and an air supply check valve; The exhaust air device comprises an exhaust air check valve one, an exhaust air fireproof valve, an exhaust air fan, an exhaust air check valve two and an exhaust air outlet assembly; The fresh air inlet assembly is connected in sequence with the heat exchanger, the fresh air check valve and a fresh air inlet of the evaporating chamber through a fresh air pipe, and the superheater is located inside the fresh air pipe connecting the heat exchanger and the fresh air check valve; The cold air outlet of the evaporating chamber is connected in sequence with the air supply fan, the air supply fireproof valve, the air supply check valve and a cold air inlet of the explosion-proof freezer through an air supply pipe; The exhaust air outlet of the explosion-proof freezer is connected in sequence with the exhaust air check valve one, the exhaust air fireproof valve, the heat exchanger, the exhaust air fan, the exhaust air check valve two and the exhaust air outlet assembly through an exhaust air pipe, and the supercooler is located inside the exhaust air pipe; The defrosting air device comprises a defrosting air fan and a defrosting air outlet assembly, and the defrosting air fan is connected with a defrosting air inlet of the evaporating chamber through a defrosting air pipe.

2. The all-fresh air anti-frosting cycle system for an explosion-proof freezer according to claim 1, wherein, In the refrigeration device, the condensing unit is connected in sequence with the liquid accumulator, the supercooler, the solenoid valve, the expansion valve and a refrigerant inlet of the evaporator through a refrigeration liquid supply pipe; and a refrigerant outlet of the evaporator is connected in sequence with the superheater and the condensing unit through a refrigeration gas return pipe.

3. The all-fresh air anti-frosting cycle system for an explosion-proof freezer according to claim 1, wherein, The fresh air inlet assembly, the exhaust air outlet assembly and the defrosting air outlet assembly each comprise a filter and an isolator.

4. The all-fresh air anti-frosting cycle system for an explosion-proof freezer according to claim 1, wherein, For the exhaust air fan, the condensing unit, the defrosting air fan and the air supply fan used, when located in an explosion-proof area of the explosion-proof freezer, an exhaust air fan, a condensing unit, a defrosting air fan and an air supply fan with explosion-proof function are adopted.

5. The all-fresh air anti-frosting cycle system for an explosion-proof freezer according to claim 1, wherein, The condensing unit, the air supply fan, the exhaust air fan, the defrosting air fan and the solenoid valve are connected with the PLC program controller through an electric circuit.

6. The all-fresh air anti-frosting cycle system for an explosion-proof freezer according to claim 1, wherein, The supercooler is specifically placed inside an exhaust air pipe connecting the heat exchanger and the exhaust air fan.

7. The all-fresh air anti-frosting cycle system for an explosion-proof freezer according to claim 1, wherein, A defrosting air check valve is arranged at a defrosting air inlet of the evaporating chamber.

8. The all-fresh air anti-frosting cycle system for an explosion-proof freezer according to claim 1, wherein, The outer walls of the air supply pipe, the exhaust air pipe and the fresh air pipe are each provided with a heat preservation layer.

9. The all-fresh air anti-frosting cycle system for an explosion-proof freezer according to claim 1, wherein, An exhaust air filter is placed in the exhaust air pipe connecting the exhaust air fireproof valve and the heat exchanger.

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