Refrigerating unit with defrosting function and used for anti-explosion refrigeration house

Abstract

The utility model provides a refrigerating unit with a defrosting function and used for an anti-explosion refrigeration house. The refrigerating system comprises a condenser, a compressor, a liquid storage device, an oil separator, a refrigerating pipeline and a first electric control valve; the defrosting system comprises a heat preservation box, an electric heater, a defrosting agent pump, a defrosting pipeline and a second electric control valve. The control mechanism is arranged on the base and used for controlling the refrigerating system and the defrosting system to be started or stopped. The refrigeration system is used for cooling air in the refrigeration house, and after the refrigeration house is used for a certain time, namely after double layers on the air cooler in the refrigeration house are combined to a certain degree, the control mechanism controls the refrigeration system to stop refrigeration, and then the control mechanism controls the defrosting system to send heated defrosting medium ethylene glycol into the air cooler. Therefore, the frost layer is melted. Therefore, the defrosting device has the advantages of being good in defrosting effect, more integrated, higher in reliability of the refrigeration storage and more energy-saving.

Description

Technical Field

[0001] The utility model relates to the technical field of cold storage equipment, in particular to a refrigeration unit with a defrosting function and used in explosion-proof cold storage. Background Art

[0002] With the rapid development of cold chain logistics in my country, people have placed higher demands on the preservation and quality of goods. The storage environment conditions of cold storage directly affect the storage quality of goods and are crucial to the preservation of goods. To ensure the safety and quality of fresh and frozen foods in circulation, on the one hand, it is necessary to continuously renovate and build new types of refrigerated and frozen warehouses. This is the foundation and core. At the same time, it is necessary to strengthen the pre-cooling process, improve the refrigerated transportation system, and strengthen temperature control throughout the food circulation process. Only by establishing and improving a cold chain logistics system with cold storage as the core can the safety and quality of food be ultimately guaranteed. Cold chain logistics is a socialized system project that is difficult for a single enterprise to achieve. The company's refrigeration facilities should be socialized, and the service functions of cold storage should be extended upward and downward. We should advocate and promote the development of third-party integrated cold chain logistics companies and cooperation between cold storage and refrigerated transportation companies.

[0003] A cold storage is a warehouse that uses cooling facilities to create suitable humidity and low temperature conditions. It is also called a cold storage. It is a place for processing and storing agricultural and livestock products. Therefore, the quality of the cold storage directly affects the freshness and quality of the items placed in the cold storage.

[0004] The refrigeration principle of the cold storage: After the liquid refrigerant absorbs the heat of the object to be cooled in the evaporator, it vaporizes into low-temperature and low-pressure steam, is sucked into the compressor, compressed into high-pressure and high-temperature steam, and then discharged into the finned condenser. In the finned condenser, it releases heat to the cooling medium (water or air), condenses into a high-pressure liquid, is throttled by the throttle valve to a low-pressure and low-temperature refrigerant, and enters the evaporator again to absorb heat and vaporize, thus achieving the purpose of circulating refrigeration. However, during the refrigeration process, frost is easily formed on the surface of the air cooler, especially the evaporator inside the air cooler. If the thickness of the frost is large, it will affect the heat exchange between the evaporator and the environment, thereby affecting the heat exchange effect and refrigeration effect of the evaporator, and will lead to increased energy consumption.

[0005] At present, the surface defrosting of evaporators used in small and medium-sized cold storage mainly adopts electric defrosting. This method uses a certain number of electric heating tubes to be installed between the fins of the evaporator coil. When defrosting is required, the electric heating is started and the heat generated by the electric heating tubes is used to remove the frost layer on the evaporator surface. The control of the electric heating tubes is achieved by setting the defrost cycle and defrost time through a defrost controller.

[0006] This traditional electric defrost method has the following major problems: 1) Because it uses a timed defrost control mode, the defrost electric heating is forced to start regardless of whether there is frost on the evaporator surface; 2) the uneven distribution of the electric heating tubes easily leads to uneven defrosting, requiring a long defrost time; 3) it significantly affects the temperature fluctuation of the cold storage, affecting the quality of food; 4) the power consumption during defrost is high, which seriously affects energy conservation. Therefore, the existing technology has limitations. Utility Model Content

[0007] The utility model is developed to solve the above problems, and aims to provide a refrigeration unit with a defrosting function and used in explosion-proof cold storage.

[0008] The utility model provides a refrigeration unit with a defrosting function and used in explosion-proof cold storage, which has the following characteristics: a base,

[0009] The refrigeration system includes a condenser, a compressor, a liquid reservoir, an oil separator, a refrigeration pipeline, and a first electric control valve. The condenser is arranged on the base, the compressor is arranged on the base and located above the condenser, the liquid reservoir is arranged on the base and located on one side of the condenser, the oil separator is arranged on the base and located on one side of the condenser, and the oil separator and the liquid reservoir are located on the same side. The compressor is connected to the condenser through the refrigeration pipeline, the liquid reservoir is connected to the compressor and the condenser through the refrigeration pipeline, the oil separator is connected to the compressor and the condenser through the refrigeration pipeline, and the first electric control valve is arranged on the refrigeration pipeline.

[0010] The defrost system includes an insulation box, an electric heater, a defrost pump, a defrost pipeline, and a second electric control valve. The insulation box is arranged on the base, the electric heater is arranged on the insulation box, and is used to heat the defrost medium inside the insulation box. The defrost pump is arranged on the base and connected to the insulation box through the defrost pipeline. The second electric control valve is arranged on the defrost pipeline.

[0011] The control mechanism is arranged on the base and is used to control the start or shut down of the refrigeration system and the defrost system.

[0012] The refrigeration unit with a defrosting function provided by the present invention and used for an explosion-proof cold storage can also have the following features: a plurality of refrigeration systems are provided on the base, and the plurality of refrigeration systems and the defrosting system are arranged in parallel on the base.

[0013] In the refrigeration unit with defrost function provided by the present invention and used for explosion-proof cold storage, it can also have the following features: the control mechanism includes a pressure sensor, a temperature sensor and a PLC control panel, the pressure sensor is arranged on the refrigeration pipeline, the temperature sensor is arranged on the defrost pipeline, and the PLC control panel is arranged on the base.

[0014] The refrigeration unit with a defrosting function provided by the present invention and used for an explosion-proof cold storage can also have the following features: the insulation box, the electric heater, the defrost pump, the defrost pipeline, and the second electric control valve are all made of stainless steel.

[0015] The refrigeration unit with a defrosting function provided by the present invention and used for an explosion-proof cold storage can also have the following feature: the condenser is a water-cooled condenser.

[0016] The refrigeration unit with a defrosting function provided by the present invention and used for an explosion-proof cold storage can also have the following feature: the defrosting medium is a 55% ethylene glycol solution.

[0017] Functions and effects of utility models

[0018] The refrigeration unit with a defrost function for explosion-proof cold storage disclosed herein is designed to cool the air within the cold storage via a refrigeration system. After a certain period of use, i.e., when the double layer of frost on the air cooler within the cold storage reaches a certain level, refrigeration is stopped, and heated defrosting medium ethylene glycol is introduced into the air cooler to melt the frost. Therefore, the present invention offers the advantages of effective defrosting, greater integration, increased cold storage reliability, and greater energy efficiency. Furthermore, both the refrigeration system and the defrost system are located on the same base, enhancing maintainability and simplifying installation. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a structural diagram of a refrigeration unit with a defrosting function used in explosion-proof cold storage according to the present invention;

[0020] Figure 2 The utility model is a top view of a refrigeration unit with a defrosting function and used in an explosion-proof cold storage.

[0021] Description of reference numerals:

[0022] 1. Base; 2. Refrigeration system; 21. Condenser; 22. Compressor; 23. Liquid reservoir; 24. Oil separator; 25. Refrigeration pipeline; 26. First electric control valve; 3. Defrost system; 31. Insulation box; 32. Defrost pump; 33. Defrost pipeline; 34. Second electric control valve; 4. Control mechanism; 41. PLC control panel. DETAILED DESCRIPTION

[0023] In order to make the technical means, creative features, objectives and effects achieved by the present invention easier to understand, the present invention is described in detail in the following embodiments with reference to the accompanying drawings.

[0024] Example

[0025] Figure 1It is a structural diagram of the utility model. Figure 2 A top view of the present invention.

[0026] like Figure 1 and Figure 2 As shown, this embodiment provides a refrigeration unit with a defrost function and used in an explosion-proof cold storage, including: a base 1, a refrigeration system 2, a defrost system 3 and a control mechanism 4.

[0027] In this embodiment, a plurality of refrigeration systems 2 are provided on the base 1 , and the plurality of refrigeration systems 2 and the defrosting system 3 are arranged in parallel on the base 1 .

[0028] like Figure 1 and Figure 2 As shown, the base 1 is composed of a base frame and a plurality of support frames arranged on the base frame. The plurality of support frames are used to arrange various components of the refrigeration system 2 and the defrosting system 3.

[0029] like Figure 1 and Figure 2 As shown, the refrigeration system 2 includes a condenser 21, a compressor 22, a liquid reservoir 23, an oil separator 24, a refrigeration line 25, and a first electric control valve 26. The condenser 21 is arranged on the base 1, the compressor 22 is arranged on the base 1 and located above the condenser 21, the liquid reservoir 23 is arranged on the base 1 and located on one side of the condenser 21, and the oil separator 24 is arranged on the base 1 and located on one side of the condenser 21, and the oil separator 24 and the liquid reservoir 23 are located on the same side. The compressor 22 is connected to the condenser 21 via a refrigeration line 25, the liquid reservoir 23 is connected to the compressor 22 and the condenser 21 via a refrigeration line 25, and the oil separator 24 is connected to the compressor 22 and the condenser 21 via a refrigeration line 25. The first electric control valve 26 is arranged on the refrigeration line 25. The refrigeration system 2 also includes an evaporator and an expansion valve. The evaporator is connected to the expansion valve and the compressor 22 via a refrigeration line. However, the evaporator and the expansion valve are not arranged on the base 1, so they are not shown in the figure.

[0030] In this embodiment, the condenser 21 is a water-cooled condenser.

[0031] like Figure 1 and Figure 2 As shown, the defrost system 3 includes an insulation box 31, an electric heater (not shown in the figure), a defrost pump 32, a defrost pipeline 33, and a second electric control valve 34. The insulation box 31 is arranged on the base 1, and the electric heater is arranged on the insulation box 31 for insulating and heating the defrost medium inside the insulation box 31. The defrost pump 32 is arranged on the base 1 and is connected to the insulation box 31 through the defrost pipeline 33. The second electric control valve 34 is arranged on the defrost pipeline 33.

[0032] In this embodiment, the heat preservation box 31 , the electric heater, the defrost pump 32 , the defrost pipeline 33 , and the second electric control valve 34 are all made of stainless steel.

[0033] In this embodiment, the defrosting medium is a 55% ethylene glycol solution.

[0034] In this embodiment, the defrost pump 32 is an explosion-proof water pump; and the second electric control valve 34 is an explosion-proof electric valve.

[0035] like Figure 1 and Figure 2 As shown, the control mechanism 4 is installed on the base 1 and is used to control the activation or deactivation of the refrigeration system 2 and the defrost system 3. The control mechanism 4 includes a pressure sensor, a temperature sensor, and a PLC control panel 41. The pressure sensor is installed on the refrigeration line 25, the temperature sensor is installed on the defrost line 33, and the PLC control panel 41 is installed on the base 1.

[0036] In this embodiment, the PLC control panel 41 is an explosion-proof PLC control panel.

[0037] Functions and Effects of the Embodiments

[0038] The refrigeration unit with a defrost function for explosion-proof cold storage disclosed herein is designed to cool the air within the cold storage via a refrigeration system. After a certain period of use, i.e., when the double layer of frost on the air cooler within the cold storage reaches a certain level, refrigeration is stopped, and heated defrosting medium ethylene glycol is introduced into the air cooler to melt the frost. Therefore, the present invention offers the advantages of effective defrosting, greater integration, increased cold storage reliability, and greater energy efficiency. Furthermore, both the refrigeration system and the defrost system are located on the same base, enhancing maintainability and simplifying installation.

[0039] The above-mentioned embodiments are preferred examples of the present invention and are not intended to limit the scope of protection of the present invention.

Claims

1. A refrigeration unit with a defrosting function for explosion-proof cold storage, characterized in that: include: base, A refrigeration system includes a condenser, a compressor, a liquid reservoir, an oil separator, a refrigeration pipeline, and a first electric control valve. The condenser is arranged on the base, the compressor is arranged on the base and located above the condenser, the liquid reservoir is arranged on the base and located on one side of the condenser, the oil separator is arranged on the base and located on one side of the condenser, and the oil separator and the liquid reservoir are located on the same side. The compressor is connected to the condenser through the refrigeration pipeline, the liquid reservoir is connected to the compressor and the condenser through the refrigeration pipeline, the oil separator is connected to the compressor and the condenser through the refrigeration pipeline, and the first electric control valve is arranged on the refrigeration pipeline. The defrost system includes an insulation box, an electric heater, a defrost pump, a defrost pipeline, and a second electric control valve. The insulation box is arranged on the base, the electric heater is arranged on the insulation box, and is used to heat the defrost medium inside the insulation box. The defrost pump is arranged on the base and connected to the insulation box through the defrost pipeline. The second electric control valve is arranged on the defrost pipeline. The control mechanism is arranged on the base and is used for controlling the start or shut down of the refrigeration system and the defrosting system.

2. The refrigeration unit with a defrosting function for explosion-proof cold storage according to claim 1, characterized in that: in, A plurality of refrigeration systems are provided on the base, and the plurality of refrigeration systems and the defrosting system are arranged in parallel on the base.

3. The refrigeration unit with defrosting function for explosion-proof cold storage according to claim 1, characterized in that: in, The control mechanism includes a pressure sensor, a temperature sensor and a PLC control panel. The pressure sensor is arranged on the refrigeration pipeline, the temperature sensor is arranged on the defrost pipeline, and the PLC control panel is arranged on the base.

4. The refrigeration unit with a defrosting function for explosion-proof cold storage according to claim 1, characterized in that: in, The heat preservation box, the electric heater, the defrost pump, the defrost pipeline, and the second electric control valve are all made of stainless steel.

5. The refrigeration unit with defrosting function for explosion-proof cold storage according to claim 1, characterized in that: in, The condenser is a water-cooled condenser.

6. The refrigeration unit with a defrosting function for explosion-proof cold storage according to claim 1, characterized in that: in, The defrosting medium is 55% ethylene glycol solution.

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