Refrigerating system of refrigeration house

Abstract

The invention discloses a refrigeration system of a refrigeration house, comprising an air cooler arranged in the refrigeration house; the water receiving disc is arranged at the bottom of the air cooler, and the water receiving disc is used for collecting condensate water and defrosting water generated by the air cooler; the water receiving disc is communicated with the cold storage device through a first pipeline, and water in the water receiving disc flows through the cold storage device for cold storage and heat exchange; and the auxiliary defrosting water spraying pipe is installed on the air cooler, the cold storage device is communicated with a water path of the auxiliary defrosting water spraying pipe through a second pipeline, and an electromagnetic valve is arranged on the auxiliary defrosting water spraying pipe. The refrigeration system of the refrigeration house can effectively save energy.

Description

Technical Field

[0001] The present invention relates to the field of refrigeration technology, and in particular to a refrigeration system for a cold storage. Background Art

[0002] Whether from an operational or social perspective, reducing the operating energy consumption of the cold storage refrigeration system is of great significance.

[0003] In order to facilitate the communication between cold storages and loading and unloading, most cold storages are equipped with hallways, which can also prevent the outside air from directly entering the cold storage to the greatest extent. In order to effectively and quickly absorb the heat brought by the outside hot air and goods, the hallway temperature is generally set at 10-15℃.

[0004] In the prior art, some energy-saving systems for cold storage are provided, but the system control is complex and the overall cost is high. In the refrigeration system of a conventional cold storage, since the evaporator (the cold air blower in the cold storage) and the condenser are far apart, the condensed water and defrosted water of the evaporator cannot be recycled to the condenser for heat dissipation, and are generally discharged directly, wasting cold and water resources, resulting in increased energy consumption of the refrigeration system.

[0005] In summary, the refrigeration system of the cold storage in the prior art does not reasonably utilize resources, resulting in high system energy consumption. The prior art urgently needs a refrigeration system of the cold storage that can effectively save energy. Summary of the invention

[0006] An embodiment of the present invention provides a refrigeration system for a cold storage that can effectively save energy.

[0007] To achieve the above-mentioned objectives, the present invention provides a refrigeration system for a cold storage, comprising: an air cooler, arranged in the cold storage; a water receiving pan, arranged at the bottom of the air cooler, and used to collect condensed water and defrost water generated by the air cooler; a cold storage device, the water receiving pan is connected to the cold storage device through a first pipeline, and water in the water receiving pan flows through the cold storage device for cold storage and heat exchange; an auxiliary defrost spray pipe, installed on the air cooler, the cold storage device is connected to the auxiliary defrost spray pipe through a second pipeline, and a solenoid valve is provided on the auxiliary defrost spray pipe.

[0008] Furthermore, the cold storage device is arranged in a hall adjacent to the cold storage, and the cold storage device is used to cool the hall.

[0009] Furthermore, the cold storage device includes a heat exchange tube and a cold storage plate, the heat exchange tube coil is arranged inside the cold storage plate, one end of the heat exchange tube is connected to the first pipeline, and the other end is connected to the second pipeline; the outside of the heat exchange tube is filled with phase change material.

[0010] Furthermore, the phase change material includes one or more of the following materials: paraffin, fatty acid, polyol, and higher alkane.

[0011] Furthermore, a heat-insulating layer is arranged outside the first pipeline.

[0012] Furthermore, the first pipeline is provided with a liquid storage bend.

[0013] Furthermore, a relief valve is arranged on the second pipeline.

[0014] Furthermore, the second pipeline is provided with a control pipeline, and the control pipeline is provided with a stop valve, a filter, a pressure gauge, a circulating water pump and a check valve.

[0015] Furthermore, there are at least two control pipelines, and all of the control pipelines are arranged in parallel.

[0016] Furthermore, a maintenance valve is provided on the first pipeline.

[0017] Furthermore, there are multiple cooling fans, there are multiple cold storage devices and they are arranged one-to-one with the cooling fans, and the cold storage devices are connected to the corresponding cooling fans through a separate first pipeline; there are multiple auxiliary defrosting water spray pipes and they are arranged one-to-one with the cooling fans;

[0018] There is one second pipeline, all the cold storage devices are connected in parallel and communicated with the second pipeline, and all the auxiliary defrosting water spray pipes are arranged in parallel and communicated with the second pipeline.

[0019] When the surface temperature of the evaporator is lower than 0°C, air flowing over the surface of the evaporator will precipitate condensed water to frost the surface of the evaporator. As the frost layer can cover the entire surface of the evaporator over time, the heat transfer coefficient of the evaporator is greatly reduced. Therefore, in the refrigeration system of the cold storage of the present invention, the evaporator is installed in the cold storage using a cold air machine, which solves the above problems and improves the energy efficiency of the system. The condensed water generated when the cold air machine in the cold storage is running or the defrosted water generated when defrosting is connected to the cold storage device for cold storage, and the cold storage is used for other cooling purposes, which increases the energy efficiency utilization rate. Moreover, in order to solve the waste of cold and water sources caused by the direct discharge of condensed water and defrosted water, the auxiliary defrosting water spray pipe is provided with a solenoid valve. When the cold air machine defrosts, the solenoid valve is opened, and the condensed water and defrosted water heated by the cold storage device are sent to the auxiliary defrosting water spray pipe, and the inner coil of the cold air machine is sprayed with water to assist defrosting, thereby improving the defrosting efficiency. The refrigeration system of the cold storage of the present invention makes the most of the condensed water and defrosted water, and saves energy waste through a variety of coordination, which is more energy-saving. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1is a connection diagram of a refrigeration system of a cold storage according to an embodiment of the present invention;

[0021] Figure 2 It is a partial structural schematic diagram of a refrigeration system of a cold storage in an embodiment of the present invention;

[0022] Figure 3 It is a schematic structural diagram of a cold storage device of a refrigeration system of a cold storage according to an embodiment of the present invention. DETAILED DESCRIPTION

[0023] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments, but they are not intended to limit the present invention.

[0024] See also Figures 1 to 3 As shown, according to an embodiment of the present invention, a refrigeration system of a cold storage is provided, and the refrigeration system of the cold storage includes an air cooler 10, a water receiving pan 20, a cold storage device 30 and an auxiliary defrost water spray pipe 40, the air cooler 10 is arranged in the cold storage A1; the water receiving pan 20 is arranged at the bottom of the air cooler 10, and the water receiving pan 20 is used to collect condensed water and defrost water generated by the air cooler 10; the water receiving pan 20 is connected with the cold storage device 30 through a first pipeline L10, and the water in the water receiving pan 20 flows through the cold storage device 30 for cold storage and heat exchange; the auxiliary defrost water spray pipe 40 is installed on the air cooler 10, and the cold storage device 30 is connected with the auxiliary defrost water spray pipe 40 through a second pipeline L20, and a solenoid valve 41 is provided on the auxiliary defrost water spray pipe 40.

[0025] When the surface temperature of the evaporator is lower than 0°C, air flowing over the surface of the evaporator will precipitate condensed water to frost the surface of the evaporator. As the frost layer can cover the entire surface of the evaporator over time, the heat transfer coefficient of the evaporator is greatly reduced. Therefore, in the refrigeration system of the cold storage of the present invention, the evaporator is installed in the cold storage using a cold air machine, which solves the above problems and improves the energy efficiency of the system. The condensed water generated when the cold air machine in the cold storage is running or the defrosted water generated when defrosting is connected to the cold storage device for cold storage, and the cold storage is used for other cooling purposes, which increases the energy efficiency utilization rate. Moreover, in order to solve the waste of cold and water sources caused by the direct discharge of condensed water and defrosted water, the auxiliary defrosting water spray pipe is provided with a solenoid valve. When the cold air machine defrosts, the solenoid valve is opened, and the condensed water and defrosted water heated by the cold storage device are sent to the auxiliary defrosting water spray pipe, and the inner coil of the cold air machine is sprayed with water to assist defrosting, thereby improving the defrosting efficiency. The refrigeration system of the cold storage of the present invention makes the most of the condensed water and defrosted water, and saves energy waste through a variety of coordination, which is more energy-saving.

[0026] Preferably, the cold storage device 30 is disposed in a hallway A2 adjacent to the cold storage A1, and the cold storage device 30 is used to cool the hallway A2.

[0027] Conventional large cold storages are usually equipped with hallways, and the common hallway temperature setting is 10-15℃. The cold storage temperature is often below 0℃, and the cold storage is adjacent to the hallway. The defrost water produced by the cold air blower in the cold storage or the condensed water produced during operation is passed to the cold storage device in the low-temperature hallway for cold storage. When the temperature in the hallway is higher than the temperature of the cold storage device, the cold storage device will release the cold, that is, start to refrigerate the hallway. The hallway equipped with a cold storage device can reduce the selection of hallway cold air blowers and reduce the investment cost of the hallway refrigeration system.

[0028] The temperature of the hall is exchanged with the cold storage device. After the condensed water or defrosted water passes through the cold storage device for heat exchange, the temperature is about 15-20℃, which can greatly improve the defrosting efficiency.

[0029] See also Figure 3 The cold storage device 30 includes a heat exchange tube 31 and a cold storage plate 32. The heat exchange tube 31 is coiled inside the cold storage plate 32. One end of the heat exchange tube 31 is connected to the first pipeline L10, and the other end is connected to the second pipeline L20. The outside of the heat exchange tube 31 is filled with phase change material.

[0030] The cold storage plate can be installed flexibly and can be installed according to the specific structural position. The outside of the heat exchange tube 31 is filled with phase change material for cold storage and cooling. The heat exchange tube 31 is arranged in an S shape, and defrost water or condensed water flows in the pipe of the heat exchange tube 31, and the outside of the pipe is phase change material.

[0031] Preferably, the phase change material includes one or more of the following materials:

[0032] Paraffin, fatty acids, polyols, higher alkanes.

[0033] According to the different proportions of phase change materials, when the temperature reaches a certain value, it will change from solid to liquid, and release cold in the process, and store cold on the contrary. The above-mentioned phase change materials are organic phase change materials, and organic substances are usually paraffin, fatty acids, polyols, higher alkanes, etc. Its main advantages are that the solid state has good formability, it is generally not easy to have supercooling and phase separation, the material is less corrosive and less toxic, and the phase change temperature of the cold storage plate can be changed by the proportion of different phase change materials.

[0034] Combination Figure 2 As shown, further preferably, a heat-insulating layer is provided outside the first pipeline L10.

[0035] The thermal insulation layer can delay the loss of cold energy to the greatest extent and prevent the cold energy from being lost into the air in the first pipeline, thereby improving the energy utilization rate and achieving energy-saving effect.

[0036] Preferably, the first pipeline L10 is provided with a liquid storage bend L11. The water receiving tray 20 ensures a certain inclination angle and is provided with a drain outlet at the lowest point.

[0037] To ensure that condensed water and defrost water can flow smoothly in the cold storage plate, a liquid storage bend L11 is set in the vertical pipe of the first pipeline to ensure that the vertical pipe section on the liquid storage bend has sufficient height to make the liquid pressure head equal to the pressure drop that may be encountered in the cold storage plate.

[0038] Combination Figure 1 As shown, a relief valve 50 is provided on the second pipeline L20.

[0039] When the refrigeration system is running, the solenoid valve 41 is closed. During the operation of the system, part of the condensed water on the surface of the air cooler flows to the water receiving tray, and part of it frosts on the surface of the coil inside the air cooler. When there is condensed water in the water receiving tray, the condensed water will flow down along the first pipeline L10 and stay at the liquid storage bend L11. When the condensed water has a sufficient height in the vertical pipe section, the condensed water continues to flow downward to the cold storage device of the organic phase change material, and then enters the second pipeline L20. If the air cooler is not in defrost mode, the condensed water is directly discharged through the overflow valve (discharged to the drain pipe).

[0040] In this case, the flow order of the condensed water is: the air cooler 10 → the water receiving tray 20 → the first pipeline L10 → the organic phase change material cold storage device 30 → the second pipeline L20 → the overflow valve 50 → drainage.

[0041] When the frost layer on the surface of the coil in the air cooler reaches the defrosting condition detected by the system, the air cooler turns on the defrosting mode. At this time, the solenoid valve 41 is controlled to open, and the condensed water sent by the water pump passes through the solenoid valve and enters the air cooler in the defrosting mode, spraying water on the coil in the air cooler to assist defrosting, making full use of the defrosting condensed water to improve the defrosting efficiency. After the condensed water and the defrosting water merge in the water receiving pan, they are discharged from the air cooler through the drain pipe. When the air cooler stops defrosting, the corresponding solenoid valve 41 is closed.

[0042] In this case, the flow order of condensed water is: air cooler 10 → water receiving tray 20 → first pipeline L10 → organic phase change material cold storage device 30 → second pipeline L20 → solenoid valve 41 → auxiliary defrost spray pipe 40 → air cooler 10.

[0043] See also Figure 1 Further preferably, the second pipeline L20 has a control pipeline L21, and the control pipeline L21 is provided with a stop valve 61, a filter 62, a pressure gauge 63, a circulating water pump 64 and a check valve 65.

[0044] The control line L21 is used to optimize the control of the water in the second line, the stop valve 61, the check valve 65 and the pressure gauge 63 are used to monitor and control the water flow, and the circulating water pump 64 is used to send the water pressure to the auxiliary defrosting water spray pipe 40 or discharge it. The circulating water pump is a variable frequency water pump, which is used to adapt to different application scenarios of the combination of condensed water and defrosting water. The filter 62 is used to filter impurities to prevent the water system from being blocked.

[0045] Furthermore, there are at least two control pipelines L21, and all the control pipelines L21 are arranged in parallel. Multiple control pipelines L21 can be operated simultaneously or individually to match different flow rates. If the demand for auxiliary defrosting water spray pipes is large, two control pipelines L21 can be opened at the same time, and two circulating water pumps can be operated at the same time to supply water flow with maximum power. If the water demand is low for simple drainage or defrosting, only one control pipeline is opened, or the circulating water pumps of the two control pipelines are adjusted to low frequency to further save energy.

[0046] The refrigeration system of the cold storage has a further optimized structure, and a check valve L12 is provided on the first pipeline L10. The check valve 12 is used for check and maintenance.

[0047] In the best embodiment, there are multiple air coolers 10, there are multiple cold storage devices 30 and they are arranged one-to-one with the air coolers 10, and the cold storage devices 30 are connected to the corresponding air coolers 10 through a separate first pipeline L10; there are multiple auxiliary defrosting water spray pipes 40 and they are arranged one-to-one with the air coolers 10;

[0048] There is one second pipeline L20, all the cold storage devices 30 are connected in parallel and communicated with the second pipeline L20, and all the auxiliary defrosting water spray pipes 40 are arranged in parallel and communicated with the second pipeline L20.

[0049] The refrigeration system of the cold storage of the present invention can save energy to the greatest extent by reasonably utilizing condensed water and defrost water on the basis of a traditional defrost system and avoiding direct discharge of low-temperature water.

[0050] Assisted defrosting is achieved through auxiliary defrosting water spray pipes, which effectively reduces ice blockage at the drain outlet; reduces warehouse temperature fluctuations during defrosting and appropriately reduces the coil temperature after defrosting, thereby reducing the energy consumption of the refrigeration system.

[0051] The air cooler 10 in the cold storage adopts a hot fluorine defrosting type air cooler for refrigeration. A water receiving pan and a corresponding drain outlet are provided at the bottom of the air cooler, and an auxiliary defrosting water spray pipe is provided on the side of the air cooler.

[0052] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0053] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the numbers used in this way can be interchanged where appropriate, so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein.

[0054] Of course, the above are preferred embodiments of the present invention. It should be noted that, for those skilled in the art, several improvements and modifications can be made without departing from the basic principles of the present invention, and these improvements and modifications are also considered to be within the protection scope of the present invention.

Claims

1. A refrigeration system for a cold storage, characterized in that: include: A cooling fan (10) is arranged in the cold storage (A1); a water receiving tray (20), the water receiving tray (20) being arranged at the bottom of the air cooler (10), the water receiving tray (20) being used to collect condensed water and defrosted water generated by the air cooler (10); A cold storage device (30), wherein the water receiving pan (20) is connected to the cold storage device (30) via a first pipeline (L10), and water in the water receiving pan (20) flows through the cold storage device (30) to perform cold storage and heat exchange; The auxiliary defrost spray pipe (40) is installed on the air cooler (10); the cold storage device (30) is in water communication with the auxiliary defrost spray pipe (40) via a second pipeline (L20); and a solenoid valve (41) is provided on the auxiliary defrost spray pipe (40).

2. The refrigeration system of the cold storage according to claim 1, characterized in that: The cold storage device (30) is arranged in a hallway (A2) adjacent to the cold storage (A1), and the cold storage device (30) is used to cool the hallway (A2).

3. The refrigeration system of the cold storage according to claim 2, characterized in that: The cold storage device (30) comprises a heat exchange tube (31) and a cold storage plate (32); the heat exchange tube (31) is coiled inside the cold storage plate (32); one end of the heat exchange tube (31) is connected to the first pipeline (L10), and the other end is connected to the second pipeline (L20); The exterior of the heat exchange tube (31) is filled with a phase change material.

4. The refrigeration system of the cold storage according to claim 3, characterized in that: The phase change material includes one or more of the following materials: Paraffin, fatty acids, polyols, higher alkanes.

5. The refrigeration system of the cold storage according to claim 1, characterized in that: A heat-insulating layer is arranged outside the first pipeline (L10).

6. The refrigeration system of the cold storage according to claim 5, characterized in that: The first pipeline (L10) is provided with a liquid storage bend (L11).

7. The refrigeration system of the cold storage according to claim 1, characterized in that: The second pipeline (L20) is provided with an overflow valve (50).

8. The refrigeration system of the cold storage according to claim 1, characterized in that: The second pipeline (L20) is provided with a control pipeline (L21), and the control pipeline (L21) is provided with a stop valve (61), a filter (62), a pressure gauge (63), a circulating water pump (64) and a check valve (65).

9. The refrigeration system of the cold storage according to claim 8, characterized in that: There are at least two control pipelines (L21), and all the control pipelines (L21) are arranged in parallel.

10. The refrigeration system of a cold storage according to claim 1, characterized in that: The first pipeline (L10) is provided with a service valve (L12).

11. The refrigeration system of a cold storage according to claim 1, characterized in that: There are a plurality of cooling fans (10), there are a plurality of cold storage devices (30) and they are arranged in a one-to-one correspondence with the cooling fans (10), and the cold storage devices (30) are connected to the corresponding cooling fans (10) via a separate first pipeline (L10); there are a plurality of auxiliary defrosting water spray pipes (40) and they are arranged in a one-to-one correspondence with the cooling fans (10); There is one second pipeline (L20), all the cold storage devices (30) are connected in parallel and communicated with the second pipeline (L20), and all the auxiliary defrosting water spray pipes (40) are arranged in parallel and communicated with the second pipeline (L20).

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