A refrigeration system and method

Abstract

The application discloses a cold storage defrosting system and method, which comprises a cold storage body and a dehumidifying device. The dehumidifying device has a dehumidifying runner, and the dehumidifying runner has a treatment area and a regeneration area. The dehumidifying device reduces the humidity inside the cold storage body and removes frost inside the cold storage body through the dehumidifying runner. The dehumidifying device has a treatment air inlet and a treatment air outlet. The treatment air inlet can draw treated gas from the inside of the cold storage body, and the treatment air outlet can re-deliver dry gas after being adsorbed and dehumidified by the dehumidifying runner to the cold storage body. The cold storage defrosting system does not produce condensate water during the entire dehumidifying process of the cold storage, and does not need to drain water in the cold storage. The problem of inconvenient drainage of cold water caused by the use of defrosting methods such as electric defrosting and hot fluorine defrosting is solved. The remaining cold water in the cold storage cannot be completely drained, and the cold water will re-condense. The dehumidifying and defrosting effect of the cold storage is not complete. At the same time, there is no obvious temperature fluctuation in the cold storage during the operation of the cold storage defrosting system.

Description

Technical Field

[0001] This invention relates to the field of cold storage technology, and in particular to a cold storage defrosting system and method. Background Technology

[0002] Cold storage facilities are widely used in industry, commerce, and agriculture, covering sectors such as pharmaceuticals, food, semiconductors, and cosmetics. Currently, all cold storage facilities are classified according to their storage temperature, mainly into: high-temperature storage (5~15℃), medium-temperature storage (-5~5℃), low-temperature storage (-18~-25℃), quick-freezing storage (-35~-40℃), and deep-freezing storage (-45~-60℃). Low-temperature storage dominates the market. With the rapid expansion of cold storage logistics and increased market competition in recent years, how to maintain high efficiency and intelligence in cold storage, achieving labor savings and reduced operating energy consumption, has become a pressing issue for the industry.

[0003] Because of the very low temperature inside cold storage, and the frequent opening of doors during the storage and handling of goods, external moisture inevitably transfers into the storage area, causing frost to form. Frost forms on various surfaces including the items, the floor, the ceiling, and near the doors. While these frost locations don't increase energy consumption, they can pose safety risks, such as slippery surfaces. Besides these areas, the most significant frost problem in cold storage is on the heat exchanger fins of units using air-cooled systems. Over time, this frost can cause blockage, reducing heat exchange efficiency and increasing energy consumption. Similarly, frost on aluminum pipe cooling systems causes the same issue. Therefore, regular defrosting is essential for cold storage to ensure normal operation. Common defrosting methods and their associated problems are as follows:

[0004] (1) Electric defrosting has the problem that it consumes a lot of electricity and requires drainage after defrosting. Water that is not drained properly will still freeze in the warehouse or on the fins, so the effect is not thorough.

[0005] (2) Hot defrosting: This method takes a long time and is not thorough. Also, too many defrosting attempts or frequent defrosting may cause refrigeration system failures, which is a big risk. Summary of the Invention

[0006] The purpose of this invention is to provide a cold storage defrosting system and method for dehumidifying and defrosting cold storage.

[0007] The objective of this invention is achieved through the following technical solution:

[0008] This application provides a cold storage defrosting system, including:

[0009] The cold storage unit itself;

[0010] A dehumidification device, which has a dehumidification wheel, has a processing area and a regeneration area, and the dehumidification device reduces the internal moisture of the cold storage body and removes the frost inside the cold storage body through the dehumidification wheel;

[0011] The dehumidification device has a processing air inlet and a processing air outlet. The processing air inlet can extract the gas to be treated from inside the cold storage body, and the processing air outlet can re-transport the dried gas after being adsorbed and dehumidified by the dehumidification wheel back to the cold storage body.

[0012] Preferably, the cold storage body has an exhaust pipe and an air inlet pipe, the exhaust pipe being connected to the processing air inlet and the air inlet pipe being connected to the processing air outlet;

[0013] The intake pipe is located away from the exhaust pipe.

[0014] Preferably, the air intake pipe includes an exposed section located outside the cold storage body and an internal section located inside the cold storage body, the exposed section and the internal section being connected, wherein the internal section is located at the top inside the cold storage body and the exhaust pipe is located at the bottom inside the cold storage body.

[0015] Preferably, the cold storage body is provided with a refrigeration device, which is located inside the cold storage body on the side away from the exhaust pipe. The surface of the built-in section has several exhaust ports facing the refrigeration device to remove frost inside the refrigeration device.

[0016] Preferably, the dehumidification device is a dehumidifier with a dehumidification impeller inside. The dehumidifier has a regeneration air inlet and a regeneration air outlet. The regeneration air inlet is used to transport regeneration gas to the air inlet side of the regeneration zone of the dehumidification impeller for desorption and regeneration of the regeneration zone of the dehumidification impeller. The regeneration air outlet is used to discharge the regeneration gas discharged from the air outlet side of the regeneration zone of the dehumidification impeller from the dehumidifier.

[0017] The processing air inlet is used to convey the gas to be treated to the air inlet side of the dehumidification rotor processing zone for adsorption and dehumidification of the gas; the processing air outlet is used to discharge the dry gas discharged from the air outlet side of the dehumidification rotor processing zone from the dehumidifier; and / or,

[0018] The cold storage defrosting system also includes a heat exchange component for increasing the temperature of the regenerated gas. The heat exchange component is connected to an external heat source, and the temperature of the regenerated gas increases after passing through the heat exchange component.

[0019] Preferably, the heat exchange component is a heat exchanger, the heat source is the heat generated at the condenser end of the refrigeration device, and the heat generated at the condenser end of the refrigeration device passes through the interior of the heat exchanger and raises the surface temperature of the heat exchanger.

[0020] Preferably, the dehumidifier further includes a processing air inlet component, which is disposed on the air inlet side of the dehumidification rotor processing zone and the air outlet side of the regeneration zone, the processing air inlet component comprising:

[0021] The first cavity, along the flow direction of the gas to be treated, has a radial cross-section that gradually increases. The first cavity is used to be located on the air inlet side of the dehumidifying rotor processing area and to allow the gas to be treated to flow to the entire processing area of ​​the dehumidifying rotor.

[0022] The second cavity is isolated from the first cavity and is used to be located at the air outlet side of the dehumidifying rotor regeneration zone to discharge regeneration gas.

[0023] Preferably, the dehumidifier further includes:

[0024] The enclosure is used to mount the dehumidifying impeller;

[0025] The processing air outlet is disposed on the air outlet side of the dehumidifying rotor processing zone and the air inlet side of the regeneration zone. The processing air outlet includes a third cavity and a side port. The third cavity is disposed on the air outlet side of the dehumidifying rotor processing zone and discharges the gas to be treated after adsorption and dehumidification. The side port is isolated from the third cavity and is disposed on the air inlet side of the dehumidifying rotor regeneration zone.

[0026] Preferably, the dehumidifier further includes at least two support members that are detachably disposed inside the casing, and the dehumidification wheel is rotatably disposed between two adjacent support members;

[0027] The support member is equipped with a drive component, a transmission belt, a tensioner, and a limit switch. The transmission belt is disposed on the dehumidifying wheel. The drive component is connected to the transmission belt and is used to drive the dehumidifying wheel to rotate. The tensioner is used to tension the transmission belt. The limit switch is used to trigger when the dehumidifying wheel rotates to determine whether the dehumidifying wheel is rotating.

[0028] Preferably, the dehumidifier further includes a treatment air duct assembly and a regeneration air duct assembly;

[0029] The processing air duct assembly includes a processing fan, and the gas to be processed flows sequentially through the processing air inlet, the processing fan, the first cavity of the processing air inlet, the processing area of ​​the dehumidifying rotor, the third cavity of the processing air outlet, and the processing air outlet.

[0030] The regeneration air duct assembly includes a regeneration fan, and the regeneration gas flows sequentially through the regeneration air inlet, the regeneration zone of the dehumidifying impeller, the second cavity of the processing air inlet, the regeneration fan, and the regeneration air outlet.

[0031] This application also provides a method for defrosting a cold storage facility, using the aforementioned cold storage defrosting system, comprising the following steps:

[0032] Step S1: Connect the dehumidification device's processing air inlet and processing air outlet to the cold storage body;

[0033] Step S2: Start the dehumidification device. The processing air inlet draws the gas to be treated from inside the cold storage body into the dehumidification device and makes it pass through the processing area of ​​the dehumidification wheel. The dry gas discharged from the processing area of ​​the dehumidification wheel is transported back into the cold storage body through the processing air outlet.

[0034] Step S2 includes: the processing air inlet draws out the gas to be processed from the bottom of the cold storage body, the processing air outlet outputs dry gas from the top of the cold storage body, and the dry gas discharged from the processing air outlet passes through the exposed section and the built-in section of the air inlet pipe in sequence and is blown towards the refrigeration unit through the exhaust port.

[0035] Step S2 further includes: while the dehumidifier adsorbs and dehumidifies the gas to be treated, the heat exchange component heats up the gas through the heat generated at the condenser end of the refrigeration device, and the regeneration air inlet draws the regeneration gas heated by the heat exchange component into the dehumidifier and makes it pass through the regeneration zone of the dehumidification wheel, and the regeneration gas desorbed and regenerated in the regeneration zone of the dehumidification wheel is discharged through the regeneration air outlet.

[0036] Compared with the prior art, the beneficial effects of the present invention include at least the following:

[0037] This cold storage defrosting system uses a dehumidification rotor as its core device for dehumidification and defrosting. The dehumidification rotor is particularly advantageous at low temperatures, utilizing its own adsorption-desorption principle to dry the humid air inside the storage and expel it outside. No condensation is generated during the entire dehumidification process, eliminating the need for drainage. This solves the problem of inconvenient drainage of cold water caused by electric defrosting and hot refrigerant defrosting methods, which can lead to incomplete dehumidification and defrosting. Furthermore, this system eliminates significant temperature fluctuations within the cold storage. In contrast, both electric and hot refrigerant defrosting methods require shutting down the refrigeration system, causing the temperature to rise, impacting usability, and increasing energy consumption. This novel and energy-efficient defrosting method fundamentally solves the humidity problem, reduces the likelihood of frost formation, and eliminates the need for cumbersome defrosting and drainage procedures.

[0038] Furthermore, a dehumidification device with a dehumidifying rotor is used to draw out the highly humid gas to be treated from the bottom of the cold storage for adsorption and dehumidification. The dry gas is then discharged from the top of the cold storage towards the refrigeration unit through the exhaust port on the built-in section, gradually removing the surface frost on the refrigeration unit. This achieves dehumidification and defrosting of the cold storage interior. The entire process generates no condensate and requires no drainage, avoiding the problem of incomplete dehumidification and defrosting caused by residual cold water not being completely drained and recondensing. Moreover, there is no significant temperature fluctuation inside the cold storage during the dehumidification and defrosting process, avoiding the problem of the refrigeration system needing to be shut down and the temperature rising when using defrosting methods such as electric defrosting and hot refrigerant defrosting, thus reducing the energy consumption of the cold storage. At the same time, the condensation heat generated by the operation of the cold storage itself is used to heat the regeneration gas desorbed in the regeneration zone of the dehumidifying rotor, making full use of the waste heat generated by the operation of the cold storage itself, which is even more energy-efficient. Attached Figure Description

[0039] Figure 1 This is a schematic diagram of the structure of the cold storage defrosting system provided in an embodiment of the present invention;

[0040] Figure 2 This is a schematic diagram of the structure of the dehumidifier in the cold storage defrosting system provided in an embodiment of the present invention;

[0041] Figure 3 This is the present invention. Figure 2 Internal structure diagram of a dehumidifier;

[0042] Figure 4 This is a structural schematic diagram of the air intake component from one perspective according to an embodiment of the present invention;

[0043] Figure 5 This is a structural schematic diagram of the air intake component from another perspective in an embodiment of the present invention;

[0044] Figure 6 This is a schematic diagram of the structure of the air outlet component from one perspective according to an embodiment of the present invention;

[0045] Figure 7 This is a structural schematic diagram of the air outlet component from another perspective in an embodiment of the present invention;

[0046] Figure 8 This is a schematic diagram of the structure of the dehumidifying rotor, the air inlet component, and the air outlet component assembled according to an embodiment of the present invention;

[0047] Figure 9 This is a schematic diagram of the structure of the dehumidifying rotor, the air inlet component, and the air outlet component after assembly, as provided in an embodiment of the present invention.

[0048] In the picture:

[0049] 1. Cold storage body; 101. Exhaust pipe; 102. Inlet pipe; 1021. Exposed section; 1022. Internal section; 1023. Exhaust port; 103. Refrigeration unit;

[0050] 2. Dehumidifier; 201. Dehumidifier rotor; 202. Processing air inlet; 203. Processing air outlet; 204. Regenerated air inlet; 205. Regenerated air outlet;

[0051] 3. Heat exchange components;

[0052] 401. First cavity; 402. Second cavity;

[0053] 501. Third cavity; 502. Lateral opening;

[0054] 6. Chassis; 601. Support component; 602. Drive component; 603. Tensioner; 604. Limit switch;

[0055] 701. Processing fan; 702. Regeneration fan. Detailed Implementation

[0056] Exemplary embodiments will now be described more fully with reference to the accompanying drawings. However, these exemplary embodiments can be implemented in many forms and should not be construed as limited to the embodiments set forth herein; rather, they are provided to make the invention more comprehensive and complete, and to fully convey the concept of the exemplary embodiments to those skilled in the art. The same reference numerals in the drawings denote the same or similar structures, and therefore repeated descriptions of them will be omitted.

[0057] The terms used to express position and direction in this invention are illustrated with reference to the accompanying drawings, but changes can be made as needed, and all such changes are included within the scope of protection of this invention.

[0058] Firstly, referring to Figures 1 to 9 This application provides a cold storage defrosting system, including: a cold storage body 1 and a dehumidification device.

[0059] Specifically, the dehumidification device includes a dehumidification impeller 201, which has a processing zone and a regeneration zone. The dehumidification device reduces internal moisture and removes frost from the cold storage body 1 through the dehumidification impeller 201. The dehumidification device also has a processing air inlet 202 and a processing air outlet 203. The processing air inlet 202 extracts the gas to be treated (high-humidity air) from inside the cold storage body 1. The processing air outlet 203 returns the dried gas, dehumidified by the dehumidification impeller 201, to the cold storage body 1. Preferably, the cold storage body 1 has an exhaust pipe 101 and an inlet pipe 102. The exhaust pipe 101 connects to the processing air inlet 202, and the inlet pipe 102 connects to the processing air outlet 203. The inlet pipe 102 is positioned away from the exhaust pipe 101 to enhance air circulation within the cold storage body 1, thereby improving dehumidification and defrosting efficiency. In practical applications, the air inlet pipe 102 includes an exposed section 1021 located outside the cold storage body 1 and an internal section 1022 located inside the cold storage body 1. The exposed section 1021 and the internal section 1022 are connected. The internal section 1022 is located at the top inside the cold storage body 1, and the exhaust pipe 101 is located at the bottom inside the cold storage body 1. Generally, inside the cold storage body 1, dry air is at the bottom and humid air is at the top. Visually, the upper part of the cold storage is usually in a "white haze". When the dehumidification device is running, the humid air in the upper part of the cold storage is discharged through the exhaust pipe 101, and the dry air after adsorption and dehumidification enters the cold storage through the air inlet pipe 102.

[0060] It should be noted that the dehumidification device can be installed inside or outside the cold storage body 1. The actual installation location of the dehumidification device can be selected according to the actual situation. When the dehumidification device is installed outside the cold storage body 1, strict insulation measures are required not only for the inside and outside of the dehumidification device to prevent the formation of cold bridges, but also for the exhaust pipe 101 and the intake pipe 102 to reduce the temperature rise during the dehumidification process of the cold storage.

[0061] Therefore, this cold storage defrosting system uses a dehumidification device with a dehumidification rotor 201 as its core for dehumidification and defrosting. The dehumidification rotor 201 has advantages in low-temperature applications. Utilizing its own adsorption-desorption principle, it can dry the humid air inside the cold storage and discharge it outside. No condensate is generated during the entire dehumidification process, and there is no need to drain water from the cold storage. This solves the problem of inconvenient drainage of cold water generated by defrosting methods such as electric defrosting and hot refrigerant defrosting. Residual cold water in the cold storage will not be completely drained and will re-condense, resulting in incomplete dehumidification and defrosting. At the same time, there is no significant temperature fluctuation inside the cold storage during the operation of this cold storage defrosting system. In contrast, defrosting methods such as electric defrosting and hot refrigerant defrosting require shutting down the refrigeration system of the cold storage, causing the temperature to rise, affecting the use of the cold storage, and increasing energy consumption. This newer and more energy-efficient defrosting method fundamentally solves the humidity problem inside the cold storage, reduces the possibility of frost formation, and eliminates the need for cumbersome defrosting and drainage operations.

[0062] In one specific implementation, refer to Figure 1 The cold storage body 1 is equipped with a refrigeration unit 103, which is located inside the cold storage body 1 on the side away from the exhaust pipe 101. The surface of the built-in section 1022 has several exhaust ports 1023 facing the refrigeration unit 103 to remove frost buildup inside the refrigeration unit 103. The refrigeration unit 103 can be a fan-cooled device. In a cold storage using a fan-cooled device, the dry air dehumidified by the dehumidification device is blown towards the fan through the exhaust ports 1023 on the built-in section 1022, removing frost from its heat exchange fins. Alternatively, the refrigeration unit 103 can be an aluminum pipe cooling device. In a cold storage using aluminum pipe cooling, the dry air dehumidified by the dehumidification device is blown towards the aluminum pipe through the exhaust ports 1023 on the built-in section 1022, removing frost from the aluminum pipe.

[0063] As a preferred method, refer to Figure 1 , Figure 2 and Figure 3 The dehumidification device is a dehumidifier 2 with a dehumidification impeller 201 inside. The dehumidifier 2 has a regeneration air inlet 204 and a regeneration air outlet 205. The regeneration air inlet 204 is used to transport regeneration gas to the air inlet side of the regeneration zone of the dehumidification impeller 201 for desorption and regeneration of the regeneration zone of the dehumidification impeller 201. The regeneration air outlet 205 is used to discharge the regeneration gas discharged from the air outlet side of the regeneration zone of the dehumidification impeller 201 from the dehumidifier 2. It should be noted that the regeneration gas used to desorb and regenerate the regeneration zone of the dehumidification impeller 201 can be the heated ambient air outside the warehouse.

[0064] In actual testing, when using dehumidifier 2 to defrost the cold storage, under the conditions of a cold storage temperature of -18℃, a humidity of 90% RH, and a moisture content of 0.82 g / kg, dehumidifier 2 was run for one hour. After one hour, the humidity inside the cold storage could be reduced to 42.6% RH and the moisture content to 0.39 g / kg. This reduces the moisture content inside the cold storage, preventing icing. Furthermore, the relatively dry air after dehumidification, blown onto the frosted refrigeration unit 103 (such as a fan or aluminum pipe), gradually removes the frost. Here, RH represents relative humidity, which is the ratio of the absolute humidity in the air to the saturated absolute humidity at the same temperature and pressure.

[0065] The processing air inlet 202 is used to transport the gas to be treated to the air inlet side of the processing area of ​​the dehumidifying rotor 201 for adsorption and dehumidification of the gas. The processing air outlet 203 is used to discharge the dry gas discharged from the air outlet side of the processing area of ​​the dehumidifying rotor 201 from the dehumidifier 2. It should be noted that the dehumidifier 2 will cause a certain temperature rise when dehumidifying the gas to be treated in the cold storage, but the temperature rise is very small in cold storage applications, about 4 to 5°C. However, since the dry air after adsorption and dehumidification has low moisture content and low enthalpy, the heat load on the operation of the cold storage refrigeration system is very small. In actual applications, the energy consumption increased by the temperature rise of the dry gas is almost negligible.

[0066] The cold storage defrosting system also includes a heat exchange component 3 for increasing the temperature of the regeneration gas. The heat exchange component 3 is connected to an external heat source, and the temperature of the regeneration gas increases after passing through it. In specific applications, the heat exchange component 3 is preferably a heat exchanger, and the heat source is preferably the heat generated at the condenser end of the refrigeration unit 103. The heat generated at the condenser end of the refrigeration unit 103 passes through the interior of the heat exchanger and raises the surface temperature of the heat exchanger. Since the regeneration zone of the dehumidification rotor 201 does not have high requirements for regeneration temperature, the heat generated at the condenser end of the refrigeration unit 103 in the cold storage refrigeration system can be recovered and reused to heat the regeneration gas. The dehumidifier 2 can dehumidify and defrost the cold storage, and the waste heat from the refrigeration system of the cold storage body 1 can heat the regeneration gas of the dehumidifier 2, enabling the dehumidifier 2 and the cold storage body 1 to work together and improve energy efficiency. It should be noted that the heat exchange component 3 can not only utilize the heat generated at the condenser end of the refrigeration unit 103 to raise the temperature of the regeneration gas, but can also utilize electric heating, condensation heat from other equipment, waste hot water, or other waste heat sources on site as heat sources for raising the temperature of the heat exchange component 3.

[0067] In one specific implementation, refer to Figure 4 , Figure 5 , Figure 8 and Figure 9The dehumidifier 2 also includes a processing air inlet component, which is installed on the air inlet side of the processing zone and the air outlet side of the regeneration zone of the dehumidification rotor 201. The processing air inlet component includes a first cavity 401 and a second cavity 402. It should be noted that the cavity wall of the first cavity 401 needs to be strictly insulated to avoid heat exchange between the gas to be treated inside the first cavity 401 and objects outside the cavity, thereby reducing the temperature rise of the gas to be treated during the adsorption and dehumidification process.

[0068] The air intake component has an irregular shape, and the first cavity 401 is also designed to be irregular. The air intake component has a through hole in the middle that passes through both sides, which is used for the support shaft of the dehumidification wheel 201 to pass through. The first cavity 401 is located along the flow direction of the gas to be treated, and its radial cross-section gradually increases. The first cavity 401 is set at the air inlet side of the processing area of ​​the dehumidifying impeller 201 and allows the gas to flow to the entire processing area of ​​the dehumidifying impeller 201. Specifically, the structure of the first cavity 401 is not a regular hollow truncated cone structure, but rather a hollow truncated cone with a smaller top surface inclined to the side of the central axis. The cavity wall of the first cavity 401 is preferably set in a variable diameter manner. More specifically, the variable diameter setting of the first cavity 401 allows the radial cross-section inside the cavity to gradually increase, and the cavity wall of the first cavity 401 has a natural transition without dead corners. This makes the flow field of the gas to be treated entering the cavity more uniform, effectively utilizing the entire surface area of ​​the processing area of ​​the dehumidifying impeller 201, avoiding the accumulation of airflow on a part of the processing area surface, and improving the dehumidification efficiency of the dehumidifying impeller 201.

[0069] The second cavity 402 is isolated from the first cavity 401. The second cavity 402 is used to be located at the air outlet side of the regeneration zone of the dehumidifying rotor 201 and to discharge regeneration gas.

[0070] As an example:

[0071] The end faces of the first cavity 401 and the second cavity 402 that mate with the dehumidifying impeller 201 form a circular covering surface. The other end face of the first cavity 401 is configured as a circular interface for connecting external pipes, etc. The aforementioned circular covering surface can cover the end face of the dehumidifying impeller 201. For example, the processing area of ​​the dehumidifying impeller 201 is three-quarters of the end face, and the regeneration area is one-quarter of the end face, thus forming the complete end face of the dehumidifying impeller 201. Adaptively, the first cavity 401 is configured as a three-quarters circular covering surface corresponding to the processing area, and the second cavity 402 is configured as a one-quarter circular covering surface corresponding to the regeneration area.

[0072] It should be noted that the first cavity 401, which has a circular interface at one end and a three-quarters area end face at the other end, adopts an irregular diameter variation method to gradually increase the radial cross-section of the first cavity 401. This makes the flow field of the gas to be treated entering the cavity more uniform, effectively utilizing the entire surface area of ​​the dehumidification rotor 201, avoiding the accumulation of airflow on a part of the surface of the dehumidification rotor 201, and improving the dehumidification efficiency of the dehumidification rotor 201.

[0073] Therefore, the air inlet component is integrally molded from a high-strength, temperature-resistant plastic structure. The cavity wall of the first chamber 401 of the air inlet component adopts a special structure with an irregularly shaped and variable diameter, which gradually increases its radial cross-section. This makes the flow field discharged through the first chamber 401 more uniform, prompting the airflow to reach the entire processing area of ​​the dehumidifying rotor 201. This makes the entire rotor surface of the processing area an effective utilization area, eliminating dead zones in the processing area, improving the dehumidification efficiency of the dehumidifying rotor 201, and further enhancing the dehumidification effect of the dehumidifier 2 on the high-humidity gas to be treated in the cold storage, effectively preventing frost formation inside the cold storage.

[0074] In one specific implementation, refer to Figure 6 , Figure 7 , Figure 8 and Figure 9 The dehumidifier 2 also includes a casing 6 and an air handling unit.

[0075] The enclosure 6 is used to install the dehumidification rotor 201. It should be noted that the enclosure 6 needs to be strictly insulated both internally and externally to prevent the formation of a cold bridge at the dehumidifier 2 in the cold storage defrosting system.

[0076] The air outlet components are located on the outlet side of the dehumidifying rotor 201's treatment zone and the inlet side of the regeneration zone. The air outlet components include a third chamber 501 and a side port 502. The third chamber 501 is located at the outlet side of the dehumidifying rotor 201's treatment zone and discharges the dehumidified gas. The side port 502 is isolated from the third chamber 501 and is located on the inlet side of the regeneration zone of the dehumidifying rotor 201. It should be noted that the walls of the third chamber 501 require strict insulation measures to prevent heat exchange between the dry gas inside the third chamber 501 and objects outside the chamber, thereby reducing the temperature rise of the dry gas.

[0077] In this embodiment, refer to Figure 8 and Figure 9The dehumidifier 2 also includes at least two support members 601 detachably disposed inside the casing 6, with the dehumidifying impeller 201 rotatably disposed between adjacent support members 601. It should be noted that an annular track or guide rail is provided between the opposing surfaces of the two adjacent support members 601, allowing the dehumidifying impeller 201 to rotate. The support member 601 is preferably a plate-like structure, and the inner side of the annular track of the plate-like support member 601 has a through-open structure, allowing the corresponding regeneration gas or gas to be treated to pass smoothly through the processing zone and regeneration zone of the dehumidifying impeller 201.

[0078] The support member 601 is equipped with a drive component 602, a transmission belt, a tensioner 603, and a limit switch 604. The transmission belt is mounted on the dehumidifying wheel 201. The drive component 602 is connected to the transmission belt and drives the dehumidifying wheel 201 to rotate. The tensioner 603 is used to tension the transmission belt. The limit switch 604 is triggered when the dehumidifying wheel 201 rotates to determine whether the dehumidifying wheel 201 is rotating. It should be noted that the drive component 602 is preferably a drive motor. The output end of the drive motor is equipped with a pulley for connecting the transmission belt. The transmission belt is wound around the dehumidifying wheel 201, the tensioner 603, the pulley, and the limit switch 604. The operation of the drive motor can drive the dehumidifying wheel 201 to rotate via the transmission belt. When the dehumidifying rotor 201 rotates once, the limit switch 604 is triggered once. The dehumidifier system has a time setting in the program settings. If the limit switch 604 exceeds the time setting range and does not trigger the program, it will determine that the dehumidifying rotor 201 is malfunctioning or not rotating, so as to realize the monitoring of the working process of the dehumidifying rotor 201.

[0079] In one specific implementation, refer to Figure 3 , Figure 8 and Figure 9 The dehumidifier 2 also includes a processing air duct assembly and a regeneration air duct assembly.

[0080] The processing air duct assembly includes a processing fan 701. The gas to be processed flows sequentially through a processing air inlet 202, the processing fan 701, the first cavity 401 of the processing air inlet, the processing area of ​​the dehumidifying impeller 201, the third cavity 501 of the processing air outlet, and the processing air outlet 203. The air outlet of the processing fan 701 is connected to the first cavity 401, and the processing air outlet 203 is connected to the third cavity 501. A filter element for filtering dust can also be installed between the processing air inlet 202 and the processing fan 701. The filter element can filter out dust particles larger than 5 micrometers in the gas to be processed, preventing the processing area of ​​the dehumidifying impeller 201 from being blocked.

[0081] The regeneration air duct assembly includes a regeneration fan 702. Regeneration gas flows sequentially through a regeneration air inlet 204, a side port 502, the regeneration zone of the dehumidifying impeller 201, a second chamber 402 for processing the air intake, the regeneration fan 702, and a regeneration air outlet 205. The second chamber 402 is connected to the air inlet of the regeneration fan 702. A filter element is installed between the regeneration air inlet 204 and the side port 502. This filter element removes dust particles larger than 5 micrometers from the regeneration gas, preventing blockage of the regeneration zone of the dehumidifying impeller 201.

[0082] Secondly, this application also provides a cold storage defrosting method, employing the aforementioned cold storage defrosting system, comprising: Step S1: connecting the processing air inlet 202 and processing air outlet 203 of the dehumidification device to the cold storage body 1; Step S2: activating the dehumidification device, the processing air inlet 202 drawing the gas to be treated from the cold storage body 1 into the dehumidification device and passing it through the processing zone of the dehumidification rotor 201, and the dry gas discharged from the processing zone of the dehumidification rotor 201 being re-transported into the cold storage body 1 through the processing air outlet 203. Step S2 includes: the processing air inlet 202 extracting the gas to be treated from the bottom of the cold storage body 1, the processing air outlet 203 outputting dry gas from the top of the cold storage body 1, and the dry gas discharged from the processing air outlet 203 sequentially passing through the exposed section 1021 and the internal section 1022 of the inlet pipe 102 and being blown towards the refrigeration device 103 through the exhaust port 1023. Step S2 further includes: while the dehumidifier adsorbs and dehumidifies the gas to be treated, the heat exchange component 3 is heated by the heat generated at the condenser end of the refrigeration device 103, and the regeneration air inlet 204 draws the regeneration gas heated by the heat exchange component 3 into the dehumidification rotor 201 and makes it pass through the regeneration zone of the dehumidification rotor 201, and the regeneration gas after desorption and regeneration in the regeneration zone of the dehumidification rotor 201 is discharged through the regeneration air outlet 205.

[0083] Specifically, taking dehumidifier 2 as the dehumidification device, the dehumidifier's processing air inlet 202 is connected to the exhaust pipe 101, and the processing air outlet 203 is connected to the air inlet pipe 102. When dehumidifier 2 is started, the high-humidity gas to be treated is drawn out from the bottom of the cold storage body 1. The dehumidified gas is adsorbed by the dehumidification wheel 201 and discharged through the processing air outlet 203. The dry gas enters the internal section 1022 through the exposed section 1021 and is blown towards the refrigeration unit 103 through the exhaust port 1023, gradually removing the frost on the refrigeration unit 103. During this process, the condensation heat of the refrigeration end of the refrigeration unit 103 is heated by the heat exchange component 3. The regeneration gas is heated by the heat exchange component 3 and is drawn in by the regeneration air inlet 204, desorbing and regenerating the dehumidification wheel 201. The regeneration air outlet 205 discharges the high-humidity regeneration gas to the outside.

[0084] Therefore, a dehumidification device with a dehumidification rotor 201 is used to draw out the high-humidity gas to be treated from the bottom of the cold storage for adsorption and dehumidification. The dry gas is discharged from the top of the cold storage towards the refrigeration unit 103 through the exhaust port 1023 on the built-in section 1022, gradually removing the surface frost on the refrigeration unit 103, thus achieving dehumidification and defrosting of the cold storage. The entire process generates no condensate and requires no drainage, avoiding the problem of incomplete dehumidification and defrosting caused by residual cold water not being completely drained and recondensing. Moreover, during the dehumidification and defrosting process, there is no significant temperature fluctuation inside the cold storage, avoiding the problem of the refrigeration system of the cold storage needing to be shut down and the temperature of the cold storage rising when using defrosting methods such as electric defrosting and hot refrigerant defrosting, thus reducing the energy consumption of the cold storage. At the same time, the condensation heat generated by the operation of the cold storage itself is used to heat up the regeneration gas desorbed in the regeneration zone of the dehumidification rotor 201, making full use of the waste heat generated by the operation of the cold storage itself, which is more energy-efficient.

[0085] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the invention without departing from the principles and spirit of the invention, and all such changes should fall within the protection scope of the claims of the present invention.

Claims

1. A cold storage defrosting system, characterized in that, include: Cold storage unit (1); A dehumidification device, the dehumidification device having a dehumidification wheel (201), the dehumidification wheel (201) having a processing area and a regeneration area, the dehumidification device reducing the internal moisture of the cold storage body (1) and removing the internal frost of the cold storage body (1) through the dehumidification wheel (201); The dehumidification device has a processing air inlet (202) and a processing air outlet (203). The processing air inlet (202) can extract the gas to be processed from inside the cold storage body (1), and the processing air outlet (203) can transport the dry gas after being adsorbed and dehumidified by the dehumidification wheel (201) back to the cold storage body (1). The cold storage body (1) has an exhaust pipe (101) and an air inlet pipe (102). The exhaust pipe (101) is used to connect to the processing air inlet (202), and the air inlet pipe (102) is used to connect to the processing air outlet (203). The air inlet pipe (102) is located away from the exhaust pipe (101). The air intake pipe (102) includes an exposed section (1021) located outside the cold storage body (1) and an internal section (1022) located inside the cold storage body (1). The exposed section (1021) and the internal section (1022) are connected. The internal section (1022) is located at the top inside the cold storage body (1), and the exhaust pipe (101) is located at the bottom inside the cold storage body (1). The cold storage body (1) is provided with a refrigeration device (103). The refrigeration device (103) is located inside the cold storage body (1) on the side away from the exhaust pipe (101). The surface of the built-in section (1022) is provided with a plurality of exhaust ports (1023) facing the refrigeration device (103) to remove the frost inside the refrigeration device (103).

2. The cold storage defrosting system according to claim 1, characterized in that, The dehumidification device is a dehumidifier (2) with a dehumidification impeller (201) inside. The dehumidifier (2) has a regeneration air inlet (204) and a regeneration air outlet (205). The regeneration air inlet (204) is used to transport regeneration gas to the air inlet side of the regeneration zone of the dehumidification impeller (201) for desorption and regeneration of the regeneration zone of the dehumidification impeller (201). The regeneration air outlet (205) is used to discharge the regeneration gas discharged from the air outlet side of the regeneration zone of the dehumidification impeller (201) from the dehumidifier (2). The processing air inlet (202) is used to convey the gas to be treated to the air inlet side of the processing zone of the dehumidifying impeller (201) for adsorption and dehumidification of the gas to be treated; the processing air outlet (203) is used to discharge the dry gas discharged from the air outlet side of the processing zone of the dehumidifying impeller (2) from the dehumidifier (2); and / or, The cold storage defrosting system also includes a heat exchange component (3) for increasing the temperature of the regenerated gas. The heat exchange component (3) is connected to an external heat source, and the temperature of the regenerated gas increases after passing through the heat exchange component (3).

3. The cold storage defrosting system according to claim 2, characterized in that, The heat exchange component (3) is a heat exchanger. The heat source comes from the heat generated at the condenser end of the refrigeration device (103). The heat generated at the condenser end of the refrigeration device (103) passes through the interior of the heat exchanger and raises the temperature of the surface of the heat exchanger.

4. The cold storage defrosting system according to claim 2, characterized in that, The dehumidifier (2) further includes a processing air inlet component, which is disposed on the air inlet side of the processing zone and the air outlet side of the regeneration zone of the dehumidification rotor (201). The processing air inlet component includes: The first cavity (401) gradually increases in radial cross-section along the flow direction of the gas to be treated. The first cavity (401) is used to be located on the air inlet side of the dehumidifying impeller (201) and to allow the gas to be treated to flow to the entire processing area of ​​the dehumidifying impeller (201). The second cavity (402) is isolated from the first cavity (401) and is used to be located at the air outlet side of the regeneration zone of the dehumidifying rotor (201) and to discharge regeneration gas.

5. The cold storage defrosting system according to claim 4, characterized in that, The dehumidifier (2) also includes: A chassis (6) is used to mount the dehumidifying impeller (201); The processing air outlet is disposed on the air outlet side of the processing zone and the air inlet side of the regeneration zone of the dehumidifying impeller (201). The processing air outlet includes a third cavity (501) and a side port (502). The third cavity (501) is disposed on the air outlet side of the processing zone of the dehumidifying impeller (201) and discharges the gas to be treated after adsorption and dehumidification. The side port (502) is isolated from the third cavity (501) and is disposed on the air inlet side of the regeneration zone of the dehumidifying impeller (201).

6. The cold storage defrosting system according to claim 5, characterized in that, The dehumidifier (2) also includes at least two support members (601) that are detachably disposed inside the casing (6), and the dehumidification wheel (201) is rotatably disposed between two adjacent support members (601); The support member (601) is equipped with a drive component (602), a transmission belt, a tensioner (603), and a limit switch (604). The transmission belt is disposed on the dehumidifying wheel (201). The drive component (602) is connected to the transmission belt and is used to drive the dehumidifying wheel (201) to rotate. The tensioner (603) is used to tension the transmission belt. The limit switch (604) is used to trigger when the dehumidifying wheel (201) rotates to determine whether the dehumidifying wheel (201) is rotating.

7. The cold storage defrosting system according to claim 5, characterized in that, The dehumidifier (2) also includes a processing air duct assembly and a regeneration air duct assembly; The processing air duct assembly includes a processing fan (701), through which the gas to be processed flows sequentially: the processing air inlet (202), the processing fan (701), the first cavity (401) of the processing air inlet, the processing area of ​​the dehumidifying impeller (201), the third cavity (501) of the processing air outlet, and the processing air outlet (203). The regeneration air duct assembly includes a regeneration fan (702), and the regeneration gas flows sequentially through the regeneration air inlet (204), the regeneration zone of the dehumidifying impeller (201), the second cavity (402) of the processing air inlet, the regeneration fan (702), and the regeneration air outlet (205).

8. A method for defrosting a cold storage facility, employing the cold storage defrosting system as described in any one of claims 1 to 7, comprising the following steps: Step S1: Connect the processing air inlet (202) and processing air outlet (203) of the dehumidification device to the cold storage body (1); Step S2: Start the dehumidification device. The processing air inlet (202) draws the gas to be treated in the cold storage body (1) into the dehumidification device and makes it pass through the processing area of ​​the dehumidification wheel (201). The dry gas discharged from the processing area of ​​the dehumidification wheel (201) is transported back into the cold storage body (1) through the processing air outlet (203). Among them, the processing air inlet (202) draws out the gas to be processed from the bottom of the cold storage body (1), and the processing air outlet (203) outputs dry gas from the top of the cold storage body (1). The dry gas discharged from the processing air outlet (203) passes through the exposed section (1021) and the built-in section (1022) of the air inlet pipe (102) in sequence and is blown to the refrigeration unit (103) through the exhaust port (1023).

9. The cold storage defrosting method according to claim 8, wherein the cold storage defrosting system according to claim 6 is used, wherein, Step S2 further includes: while the dehumidifier 2 adsorbs and dehumidifies the gas to be treated, the heat exchange component (3) is heated by the heat generated at the condenser end of the refrigeration device (103), and the regeneration air inlet (204) draws the regeneration gas heated by the heat exchange component (3) into the dehumidifier 2 and makes it pass through the regeneration zone of the dehumidification wheel (201), and the regeneration gas after desorption and regeneration in the regeneration zone of the dehumidification wheel (201) is discharged through the regeneration air outlet (205).

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