Cold storage facility defrosting system and method

Abstract

Provided are a cold storage facility defrosting system and method. The cold storage facility defrosting system comprises a cold storage facility body (1) and a dehumidifier (2). The dehumidifier (2) is provided with a desiccant wheel (201), the desiccant wheel (201) comprises a process sector and a regeneration sector, and the dehumidifier (2) reduces internal moisture and removes frost inside the cold storage facility body (1) by means of the desiccant wheel (201). The dehumidifier (2) is provided with a process air inlet (202) and a process air outlet (203), wherein the process air inlet (202) can extract gas to be processed from the interior of the cold storage facility body (1), and the process air outlet (203) can re-convey dry gas obtained after adsorption and dehumidification by the desiccant wheel (201) to the cold storage facility body (1). Throughout the entire dehumidification process of the cold storage facility, the cold storage facility defrosting system does not generate condensed water, such that no drainage is required inside the cold storage facility, thereby ensuring that no significant temperature fluctuation occurs in the cold storage facility.

Description

A refrigeration warehouse defrosting system and method

[0001] This application claims partial priority to Chinese Patent Application No. 202411253289.8, filed on September 9, 2024, which is incorporated by reference herein. TECHNICAL FIELD

[0002] The present application relates to the technical field of refrigeration warehouses, and in particular to a refrigeration warehouse defrosting system and method. BACKGROUND

[0003] Refrigeration warehouses are widely used in industry, commerce, and agriculture, and are involved in industries such as medicine, food, semiconductors, and cosmetics. At present, all refrigeration warehouses are classified according to temperature, and mainly include high-temperature warehouses (5-15℃), medium-temperature warehouses (-5-5℃), low-temperature warehouses (-18- -25℃), quick-freezing warehouses (-35- -40℃), and deep-freezing warehouses (-45- -60℃). Low-temperature warehouses occupy the main market, and with the rapid expansion of refrigeration logistics and market competition in recent years, how to keep refrigeration warehouses efficient and intelligent, and achieve labor saving and energy consumption reduction has become a problem that needs to be solved by the industry.

[0004] Because the temperature inside the refrigeration warehouse is very low, and the goods are frequently opened when entering and exiting, external moisture will inevitably transfer into the warehouse, causing frost to form inside the refrigeration warehouse. The frost formation sites include the surface of the goods, the ground, the top of the refrigeration warehouse, and the position near the door, etc. Although these frost formation sites do not cause an increase in energy consumption, they may involve safety problems, such as slippery ground, etc. In addition to frost formation at the above sites, the most important frost formation pain point position is, for example, in refrigeration warehouses using air coolers for refrigeration, frost will form on the fins of the heat exchanger, which will cause blockage over a long period of time, and frost on the surface of the fins will cause the heat exchange efficiency to decrease, increasing the refrigeration energy consumption. In refrigeration warehouses using aluminum pipe for refrigeration, frost on the pipe will also cause the same problem. Therefore, the refrigeration warehouse must be defrosted regularly to ensure normal operation. At present, the commonly used defrosting methods and problem points are as follows:

[0005] (1) Electric defrosting, the problem point of which is that the electricity consumption is very high, and after defrosting, the water needs to be drained, and if the water is not completely drained, it will still freeze in the warehouse or on the fins, and the effect is not complete.

[0006] (2) Hot fluorine defrosting, which has a long defrosting time and is not complete, and too many defrosting times or too frequent defrosting may cause the refrigeration system to fail, which is a high risk. SUMMARY

[0007] The purpose of the present application is to provide a refrigeration warehouse defrosting system and method for dehumidifying and defrosting inside the refrigeration warehouse.

[0008] The purpose of the present application is achieved by adopting the following technical solution:

[0009] The application provides a cold storage defrosting system, comprising:

[0010] a cold storage body;

[0011] a dehumidification device, which has a dehumidification runner with a treatment zone and a regeneration zone, and which reduces the humidity inside the cold storage body and removes frost inside the cold storage body through the dehumidification runner;

[0012] The dehumidification device has a treatment air inlet and a treatment air outlet, the treatment air inlet can draw air to be treated from the inside of the cold storage body, and the treatment air outlet can deliver dry air after being adsorbed and dehumidified by the dehumidification runner to the cold storage body.

[0013] In some optional embodiments, the cold storage body is provided with a refrigeration device for providing a cold source of the cold storage body, and the treatment air outlet delivers dry air after dehumidification to the refrigeration device to remove frost on the refrigeration device.

[0014] In some optional embodiments, the cold storage body has a return air pipe connected with the treatment air inlet and a supply air pipe connected with the treatment air outlet.

[0015] In some optional embodiments, the dehumidification device is located outside the cold storage body, the supply air pipe includes an exposed section located outside the cold storage body and a built-in section located inside the cold storage body, the exposed section is in communication with the built-in section, and the built-in section is provided with a plurality of air outlets towards the refrigeration device.

[0016] In some optional embodiments, the dehumidification device is located inside the cold storage body, and the supply air pipe is provided with a plurality of air outlets towards the refrigeration device.

[0017] In some optional embodiments, the cold storage body has a door, the return air pipe is provided with an extension pipe, and an air inlet end of the extension pipe is arranged above the door to absorb air entering the cold storage body through the door.

[0018] In some optional embodiments, the dehumidification device is a dehumidifier with a dehumidification runner inside, the dehumidifier has a regeneration air inlet and a regeneration air outlet, the regeneration air inlet is used to deliver regeneration air to the air inlet side of the regeneration zone of the dehumidification runner to regenerate the regeneration zone of the dehumidification runner, and the regeneration air outlet is used to discharge regeneration air discharged from the air outlet side of the regeneration zone of the dehumidification runner from the dehumidifier;

[0019] The processing air inlet is used to deliver the gas to be processed to the air inlet side of the dehumidification runner processing area, so as to adsorb and dehumidify the gas to be processed, and the processing air outlet is used to discharge dry gas from the air outlet side of the dehumidification runner processing area from the dehumidifier.

[0020] In some optional embodiments, the dehumidifier further comprises an electric heating component arranged at the air inlet side of the dehumidification runner regeneration area, for increasing the temperature of the regeneration gas; or, the cold storage defrosting system further comprises a heat exchange component for increasing the temperature of the regeneration gas, the heat exchange component is arranged at the regeneration air inlet, and the heat exchange component is connected to the condensing end of the refrigeration device, for increasing the temperature of the heat exchange component; or,

[0021] The cold storage defrosting and dehumidifying system further comprises an air source heat pump arranged at the regeneration air inlet, for generating regeneration gas for desorption and dehumidification of the dehumidification runner regeneration area.

[0022] In some optional embodiments, the heat exchange component is a heat exchanger, and the heat source is the heat generated by the condensing end of the refrigeration device, which passes through the inside of the heat exchanger and increases the temperature of the surface of the heat exchanger.

[0023] In some optional embodiments, the dehumidifier further comprises a first sealing member arranged at the air inlet side of the dehumidification runner processing area and the air outlet side of the regeneration area, and the first sealing member comprises:

[0024] A first cavity, which gradually increases in radial cross section along the flow direction of the gas to be processed, is arranged at the air inlet side of the dehumidification runner processing area and is used to guide the gas to be processed to flow through the entire processing area of the dehumidification runner.

[0025] A second cavity, which is isolated from the first cavity, is arranged at the air outlet side of the dehumidification runner regeneration area and is used to discharge the regeneration gas.

[0026] In some optional embodiments, the dehumidifier further comprises:

[0027] A cabinet for mounting the dehumidification runner;

[0028] A second sealing member arranged at the air outlet side of the dehumidification runner processing area and the air inlet side of the regeneration area, the second sealing member comprises a third cavity and a side opening; the third cavity is arranged at the air outlet side of the dehumidification runner processing area and is used to discharge the gas to be processed after adsorption and dehumidification, and the side opening is isolated from the third cavity and is arranged at the air inlet side of the dehumidification runner regeneration area.

[0029] In some alternative embodiments, the dehumidifier further comprises at least two supports detachably arranged inside the cabinet, and the dehumidification runner is rotatably arranged between two adjacent supports;

[0030] The support is provided with a driving component, a transmission belt, a tensioner and a limit switch. The transmission belt is arranged on the dehumidification runner. The driving component is in transmission connection with the transmission belt and is used to drive the dehumidification runner to rotate. The tensioner is used to tension the transmission belt. The limit switch is used to trigger when the dehumidification runner rotates to determine whether the dehumidification runner rotates.

[0031] In some alternative embodiments, the dehumidifier further comprises a processing air duct assembly and a regeneration air duct assembly;

[0032] The processing air duct assembly comprises a processing air fan. The gas to be processed flows through the processing air inlet, the processing air fan, the first cavity of the first sealing member, the processing area of the dehumidification runner, the third cavity of the second sealing member and the processing air outlet in sequence.

[0033] The regeneration air duct assembly comprises a regeneration air fan. The regeneration gas flows through the regeneration air inlet, the regeneration area of the dehumidification runner, the second cavity of the first sealing member, the regeneration air fan and the regeneration air outlet in sequence.

[0034] The application further provides a refrigeration house defrosting method, comprising the following steps:

[0035] Step S1: connecting the processing air inlet and the processing air outlet of the dehumidification device to the refrigeration house body.

[0036] Step S2: starting the dehumidification device. The processing air inlet sucks the gas to be processed in the refrigeration house body into the dehumidification device and makes it pass through the processing area of the dehumidification runner. The dry gas discharged from the dehumidification runner processing area is re-delivered to the refrigeration house body through the processing air outlet.

[0037] In step S2, the dehumidification device is started.

[0038] Step S201: the processing air inlet of the dehumidification device sucks the gas to be processed from above the door, and the processing air outlet discharges the dry gas and delivers it in the air supply pipe. The dry gas in the air supply pipe is blown to the refrigeration device through the exhaust port to remove the frost on the refrigeration device.

[0039] In step S2, the dehumidification device is started.

[0040] Step S202: while the dehumidifier is adsorbing and dehumidifying the to-be-processed gas, the regeneration gas is heated by the electric heating component or the heat exchange component connected with the condensing end of the refrigeration device or generated by the air source heat pump, flows through the regeneration area of the dehumidification runner and dehumidifies the regeneration area, and then the regeneration gas after passing through the regeneration area of the dehumidification runner is discharged through the regeneration air outlet.

[0041] The cold storage defrosting system and method provided by the present application have at least the following advantages:

[0042] The cold storage defrosting system uses the dehumidification device with the dehumidification runner as the core to dehumidify and defrost the cold storage. The dehumidification runner has more advantages when applied in low temperature. The dehumidification runner can dry the humid air in the cold storage and discharge it to the outside of the cold storage by using the principle of adsorption and desorption. No condensate water is generated in the whole dehumidification process of the cold storage, and no drainage is needed in the cold storage. The problem of inconvenient drainage of cold water generated by using electric defrosting and hot fluorine defrosting is solved. The remaining cold water in the cold storage cannot be completely drained and will recondense. The dehumidification 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. The refrigeration system of the cold storage needs to be closed to make the temperature in the cold storage rise when using electric defrosting and hot fluorine defrosting, which affects the use of the cold storage and increases the energy consumption of the cold storage. A more novel and energy-saving defrosting method is used to fundamentally solve the humidity problem in the cold storage, reduce the possibility of frosting in the cold storage, and avoid the complicated operation of defrosting and drainage.

[0043] Further, the dehumidification device with the dehumidification runner is used to adsorb and dehumidify the high-humidity to-be-processed gas from the bottom of the cold storage. The dry gas is discharged from the top of the cold storage to the refrigeration device through the exhaust port on the built-in section, gradually removing the surface frost on the refrigeration device, achieving dehumidification and defrosting of the interior of the cold storage, and the whole process generates no condensate water and needs no drainage. The problem of incomplete dehumidification and defrosting effect caused by incomplete drainage of the remaining cold water in the cold storage and recondensation is avoided. Moreover, there is no obvious temperature fluctuation in the cold storage during the dehumidification and defrosting process of the cold storage. The problem of rising temperature in the cold storage caused by closing the refrigeration system of the cold storage when using electric defrosting and hot fluorine defrosting is avoided. The energy consumption of the cold storage is reduced. At the same time, the condensation heat generated by the operation of the cold storage is used to heat the regeneration gas in the regeneration area of the dehumidification runner. The waste heat generated by the operation of the cold storage is fully utilized, which is more energy-saving. BRIEF DESCRIPTION OF DRAWINGS

[0044] FIG. 1 is a structural schematic diagram of the cold storage defrosting system provided by the embodiment of the present application;

[0045] FIG. 2 is a structural schematic diagram of the dehumidifier of the cold storage defrosting system provided by the embodiment of the present application;

[0046] FIG. 3 is a schematic diagram of the internal structure of the dehumidifier in FIG. 2 of the present application;

[0047] Fig. 4 is a structural schematic diagram of one view of the first seal of the embodiment of the present application;

[0048] Fig. 5 is a structural schematic diagram of another view of the first seal of the embodiment of the present application;

[0049] Fig. 6 is a structural schematic diagram of one view of the second seal of the embodiment of the present application;

[0050] Fig. 7 is a structural schematic diagram of another view of the second seal of the embodiment of the present application;

[0051] Fig. 8 is a structural schematic diagram of one view of the dehumidification runner and the first seal and the second seal of the embodiment of the present application after assembly;

[0052] Fig. 9 is a structural schematic diagram of another view of the dehumidification runner and the first seal and the second seal of the embodiment of the present application after assembly;

[0053] Fig. 10 is a structural schematic diagram of another cold storage defrosting system provided by the embodiment of the present application;

[0054] Fig. 11 is a structural schematic diagram of still another cold storage defrosting system provided by the embodiment of the present application;

[0055] Fig. 12 is a structural schematic diagram of yet another cold storage defrosting system provided by the embodiment of the present application.

[0056] In the drawings: 1, cold storage body; 101, return air pipe; 1011, extension pipe; 102, air supply pipe; 1021, exposed section; 1022, built-in section; 1023, exhaust port; 103, refrigeration device; 104, door; 2, dehumidifier; 201, dehumidification runner; 202, treated air inlet; 203, treated air outlet; 204, regeneration air inlet; 205, regeneration air outlet; 206, first extension pipe; 207, second extension pipe; 3, heat exchange component; 401, first cavity; 402, second cavity; 501, third cavity; 502, side port; 6, case; 601, support; 602, driving component; 603, tensioner; 604, limit switch; 701, treated air fan; 702, regeneration air fan; 8, heat pump system; 9, air source heat pump. DETAILED DESCRIPTION

[0057] Example implementations will now be described more fully with reference to the accompanying drawings. Example implementations can be implemented in any number of manners, and are not limited to the embodiments described herein; rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the inventive concept to those skilled in the art. Like reference numerals refer to like elements throughout the various drawings, and thus a repeated description will be omitted.

[0058] The expression of position and direction described in the present application is illustrated by taking the drawings as an example, but changes can also be made as needed, and the changes made are included in the protection scope of the present application.

[0059] In a first aspect, with reference to FIGS. 1-12, the present application provides a cold storage defrosting system, comprising: a cold storage body 1 and a dehumidification device.

[0060] Specifically, the dehumidification device has a dehumidification runner 201, which has a treatment zone and a regeneration zone. The dehumidification device reduces the humidity inside the cold storage body 1 and removes frost inside the cold storage body 1 through the dehumidification runner 201. The dehumidification device has a treatment air inlet 202 and a treatment air outlet 203. The treatment air inlet 202 can extract the gas to be treated from the inside of the cold storage body 1, and the gas to be treated is high-humidity air inside the cold storage body 1. The treatment air outlet 203 can re-deliver dry gas after being adsorbed and dehumidified by the dehumidification runner 201 to the cold storage body 1. As a preferred mode, the cold storage body 1 has a return air pipe 101 and a supply air pipe 102. The return air pipe 101 is used to be connected with the treatment air inlet 202, and the supply air pipe 102 is used to be connected with the treatment air outlet 203. The supply air pipe 102 is arranged away from the return air pipe 101, which can enhance the circulation effect of the air flow inside the cold storage body 1 and improve the dehumidification and defrosting efficiency of the cold storage. In actual application, the supply air pipe 102 includes an exposed section 1021 located outside the cold storage body 1 and a built-in section 1022 located inside the cold storage body 1. The exposed section 1021 communicates with the built-in section 1022. The built-in section 1022 is located at the top inside the cold storage body 1, and the return air pipe 101 is located at the bottom inside the cold storage body 1. Generally, in the cold storage body 1, dry air is below and humid air is above. The upper part of the cold storage generally appears "white" visually. When the dehumidification device is running, the humid air in the upper part of the cold storage is discharged through the return air pipe 101, and the dry air after being adsorbed and dehumidified enters the cold storage through the supply air pipe 102.

[0061] Therefore, the cold storage defrosting system adopts the dehumidification device taking the dehumidification runner 201 as the core to dehumidify and defrost the cold storage. The dehumidification runner 201 has more advantages at low temperature. The dehumidification runner 201 can dry the humid air in the cold storage and discharge the dry air to the outside of the cold storage by using the principle of self adsorption and desorption. No condensate water is generated in the whole dehumidification process of the cold storage, and no drainage is needed in the cold storage. The problem of inconvenient drainage of cold water caused by the use of electric defrosting and hot fluorine defrosting is solved. The remaining cold water in the cold storage cannot be completely drained and will recondense. The dehumidification 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. Whether the electric defrosting or the hot fluorine defrosting is used, the refrigeration system of the cold storage needs to be closed to make the temperature in the cold storage rise, which affects the use of the cold storage and increases the energy consumption of the cold storage. A more novel and energy-saving defrosting method is adopted to fundamentally solve the humidity problem in the cold storage, reduce the possibility of frosting in the cold storage, and avoid the complicated operation of defrosting and drainage.

[0062] In some possible manners, referring to FIGS. 1 and 10-12, the cold storage body 1 is provided with a refrigeration device 103 for providing a cold source of the cold storage body 1. The dry gas dehumidified by the processing air outlet 203 is delivered to the refrigeration device 103 to remove the frost on the refrigeration device 103. Therefore, the defrosting system can not only remove the frost in the internal air, but also remove the frost on the refrigeration device 103 when working, so that the refrigeration device 103 can maintain good refrigeration performance, the energy consumption of the refrigeration device is reduced, and the energy efficiency of the whole cold storage is improved.

[0063] In some possible manners, referring to FIGS. 1 and 10-12, the cold storage body 1 has a return air pipe 101 and a supply air pipe 102. The return air pipe 101 is used to be connected with the processing air inlet 202, and the supply air pipe 102 is used to be connected with the processing air outlet 203. The return air pipe 101 and the supply air pipe 102 can be made of rigid material or flexible material in actual application, and the specific case can be selected according to the actual situation. Therefore, the length of the processing air inlet 202 and the processing air outlet 203 of the dehumidification device can be extended, so that the dehumidification device can not only absorb the air at any position in the cold storage body 1 for adsorption and dehumidification, but also discharge the dry gas to any position in the cold storage body 1, thereby expanding the application scenarios of the cold storage defrosting system.

[0064] In addition, the dehumidification device can be installed inside or outside the cold storage body 1, and the actual installation position of the dehumidification device can be selected according to the actual situation. When the dehumidification device is installed outside the cold storage body 1, not only the inside and outside of the dehumidification device need to be strictly insulated to prevent the formation of a cold bridge, but also the return air pipe 101 and the supply air pipe 102 need to be strictly insulated to reduce the temperature rise in the dehumidification process of the cold storage.

[0065] In some possible ways, referring to FIGS. 1, 10 and 12, the dehumidifying device is located outside the refrigeration storage body 1, the air supply pipe 102 includes an exposed section 1021 located outside the refrigeration storage body 1 and a built-in section 1022 located inside the refrigeration storage body 1, the exposed section 1021 communicates with the built-in section 1022, and the exposed section 1021 and the built-in section 1022 can be an integral structure, and the built-in section 1022 is provided with a plurality of air outlets 1023 facing the refrigeration device 103. In this way, the dry air discharged from the dehumidifying device treatment air outlet 203 passes through the exposed section 1021, the built-in section 1022 and the air outlet 1023 in turn to discharge the dry air to the refrigeration device 103, so as to remove the frost of the refrigeration device 103.

[0066] In some possible ways, the dehumidifying device is located inside the refrigeration storage body 1, and the air supply pipe 102 is provided with a plurality of air outlets 1023 facing the refrigeration device 103. Specifically, referring to FIG. 11, when the dehumidifying device is located inside the refrigeration storage body 1, the air return pipe 101 and the air supply pipe 102 are located inside the refrigeration storage body 1, the regenerative air inlet 204 is connected with the first extension pipe 206 passing through the wall of the refrigeration storage body 1, and the regenerative air outlet 205 is connected with the second extension pipe 207 passing through the wall of the refrigeration storage body 1. In this way, the dry air discharged from the dehumidifying device treatment air outlet 203 passes through the air supply pipe 102 and the air outlet 1023 in turn to discharge the dry air to the refrigeration device 103, so as to remove the frost of the refrigeration device 103.

[0067] For example, the refrigeration device 103 can be arranged at the top of the refrigeration storage body 1, and the refrigeration device 103 can be a device using a cold air machine for refrigeration. For the refrigeration storage using the cold air machine, the dry air treated by the dehumidifying device and discharged through the air outlet 1023 can be blown to the heat exchange fins of the cold air machine to remove the frost on the heat exchange fins. The refrigeration device 103 can also be a device using an aluminum pipe for refrigeration. For the refrigeration storage using the aluminum pipe, the dry air treated by the dehumidifying device and discharged through the air outlet 1023 can be blown to the aluminum pipe to remove the frost on the aluminum pipe.

[0068] It is found through research that the main source of frost in the cold storage body 1 comes from the high-temperature and high-humidity air entering the cold storage body 1 from the environment during the opening and closing of the door during loading and unloading. In order to reduce the influence of frost after the high-temperature and high-humidity air in the environment enters the storage, among some possible ways, referring to FIGS. 10-12, the cold storage body 1 has a door 104, the return air pipe 101 is provided with an extension pipe 1011, and the air inlet end of the extension pipe 1011 is arranged above the door 104 for absorbing the air entering the cold storage body 1 through the door 104. Thus, when the door 104 is opened during loading and unloading, the extension pipe 1011 can capture and adsorb the high-temperature and high-humidity air entering the cold storage body 1 from the outside, and transport it to the dehumidification device for drying, which can reduce the high-temperature and high-humidity air in the cold storage body 1 from the source, suppress the frost in the cold storage body 1, and improve the dehumidification effect of the cold storage defrosting system.

[0069] As a preferred way, referring to FIGS. 1, 2 and 3, the dehumidification device is a dehumidifier 2 internally provided with a dehumidification runner 201, 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 runner 201 to regenerate and desorb the regeneration zone of the dehumidification runner 201, and 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 runner 201 from the dehumidifier 2; it should be noted that the regeneration gas for regenerating and desorbing the regeneration zone of the dehumidification runner 201 can be the air outside the library after being heated.

[0070] The treatment air inlet 202 is used to transport the treated gas to the air inlet side of the treatment zone of the dehumidification runner 201 to adsorb and dehumidify the treated gas, and the treatment air outlet 203 is used to discharge the dry gas discharged from the air outlet side of the treatment zone of the dehumidification runner 201 from the dehumidifier 2; it should be noted that the dehumidifier 2 dehumidifies the treated gas in the library with a certain temperature rise, but the temperature rise is very small in the cold storage application, about 4-5℃, but because the dry air after adsorption and dehumidification has low water content and low enthalpy, the heat load brought by the operation of the refrigeration system of the cold storage is very small, and the energy consumption increased by the temperature rise of the dry gas can be almost ignored in actual application.

[0071] In actual tests, when the dehumidifier 2 is used for defrosting the refrigeration house, the temperature of the refrigeration house body 1 is -18℃, the humidity is 90% RH, and the moisture content is 0.82 g / kg. After starting the dehumidifier 2 and working for one hour, the humidity in the refrigeration house can be reduced to 42.6% RH, and the moisture content is 0.39 g / kg. Thus, by reducing the moisture content in the refrigeration house, the icing phenomenon in the refrigeration house can be avoided, and the relatively dry air after dehumidification can be blown against the refrigeration device 103, such as a cold air fan or an aluminum pipe, to gradually remove the frost. RH is the relative humidity, that is, the ratio of the absolute humidity in the air to the saturated absolute humidity under the same temperature and pressure.

[0072] In some possible manners, the dehumidifier 2 further includes an electric heating component (not shown in the figure) arranged at the air inlet side of the regeneration area of the dehumidification runner 201, for increasing the temperature of the regeneration gas. The electric heating component is used to heat the regeneration gas, so as to realize the desorption dehumidification of the regeneration area of the dehumidification runner 201. Although the energy consumption is relatively high, the structure of the dehumidifier 2 and the refrigeration house defrosting system can be simplified, and no additional heat source is needed. Thus, the additional electric heating component can ensure the stability of the temperature of the heat exchange component 3, and avoid the temperature fluctuation of the regeneration gas affecting the regeneration effect of the dehumidification runner 201 due to the unstable temperature of the heat exchange component 3.

[0073] The refrigeration house defrosting system further includes a heat exchange component 3 for increasing the temperature of the regeneration gas. As shown in FIG. 10, the heat exchange component 3 is arranged at the regeneration air inlet 204, and the heat exchange component 3 is connected to the condensing end of the refrigeration device 103, for increasing the temperature of the heat exchange component 3. In actual application, the heat exchange component 3 can be selected as a heat exchanger. Since the regeneration area of the dehumidification runner 201 has a low requirement for the regeneration temperature, the heat generated by the condensing end of the refrigeration device 103 of the refrigeration system of the refrigeration house can be recycled for heating the regeneration gas. The dehumidifier 2 can dehumidify and defrost the refrigeration house, and the waste heat of the refrigeration system of the refrigeration house body 1 can be used to heat the regeneration gas of the dehumidifier 2, so that the dehumidifier 2 and the refrigeration house body 1 can be cooperated, and the energy-saving effect is improved. Thus, by increasing the heat exchange component 3, the condensing heat of the refrigeration device 103 in the refrigeration house body 1 is used to increase the temperature of the regeneration gas through the heat exchange component 3, so as to realize the desorption dehumidification of the regeneration area of the dehumidification runner 201, and improve the energy efficiency of the refrigeration house defrosting system.

[0074] It should be noted that the heat exchange component 3 can not only use the heat generated by the condensing end of the refrigeration device 103 to increase the temperature of the regeneration gas, but also use the waste heat of other equipment as the heat source for increasing the temperature of the heat exchange component 3. However, in order to ensure the stability of the external heat source connected to the heat exchange component 3, an electric auxiliary heating component is generally additionally arranged on the heat exchange component 3, so as to ensure the stability of the temperature of the heat exchange component 3, and avoid the temperature fluctuation of the regeneration gas affecting the regeneration effect of the dehumidification runner 201 due to the unstable temperature of the heat exchange component 3.

[0075] In addition, referring to FIG. 11, a heat pump system 8 can be additionally provided on the basis of the present embodiment to improve the temperature stability of the heat exchange component 3. Specifically, the heat pump system 8 is connected to the condensing end of the refrigeration device 103 at the evaporating end, and the heat pump system 8 is connected to the heat exchange component 3 at the condensing end. The heat pump system 8 can recover the waste heat of the refrigeration device 103 of the refrigeration system, provide a stable heat source for the heat exchange component 3, make the temperature of the regenerated gas heated by the heat exchange component 3 more stable, and ensure the regeneration desorption effect of the regeneration zone of the dehumidifier 2. Thus, the waste heat of the refrigeration device of the refrigeration dehumidification system is used as the heat source for the heat pump system 8 to increase the temperature, which can make the temperature of the heat exchange component 3 more stable, make the regenerated gas be able to provide a stable regeneration heat source for the dehumidifier 2, ensure the desorption regeneration effect of the regeneration zone of the dehumidifier 2, make the energy efficiency ratio of the entire system higher, and be more energy-saving.

[0076] The refrigeration defrosting and dehumidification system further comprises an air source heat pump 9. Referring to FIG. 11, the air source heat pump 9 is arranged at the regeneration air inlet 204 and is used to generate the regenerated gas for the desorption dehumidification of the regeneration zone of the dehumidification runner 201. Specifically, the output end of the air source heat pump 9 is connected to the regeneration air inlet 204, and the output end of the air source heat pump 9 can directly discharge high-temperature air as the regenerated gas of the dehumidifier 2 to realize the desorption regeneration of the regeneration zone. Thus, the air source heat pump 9 can simplify the pipeline connection at the air inlet side of the regeneration zone of the dehumidifier 2, and the installation step is relatively more flexible, and the energy-saving effect is remarkable in long-term use.

[0077] In some possible manners, referring to FIGS. 4, 5, 8 and 9, the dehumidifier 2 further comprises a first sealing member arranged at the air inlet side of the treatment zone and the air outlet side of the regeneration zone of the dehumidification runner 201. The first sealing member comprises 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 to-be-treated gas in the first cavity 401 and objects outside the cavity, and to reduce the temperature rise in the adsorption and dehumidification process of the to-be-treated gas.

[0078] The first sealing member is of a special-shaped structure as a whole, and the first cavity 401 is also designed as a special-shaped structure. The middle part of the first sealing member is provided with a through hole penetrating through both sides for the support shaft of the dehumidification runner 201 to pass through. The first cavity 401 gradually increases in radial section along the direction of the flow of the gas to be treated, and is used to be arranged at the air inlet side of the treatment area of the dehumidification runner 201 and to supply the gas to be treated to the entire treatment area of the dehumidification runner 201. Specifically, the structure of the first cavity 401 is not a regular hollow conical frustum structure, but a top surface with a small area of the hollow conical frustum is inclined to one side of the central axis. The cavity wall of the first cavity 401 is preferably arranged in a special-shaped variable-diameter manner. More specifically, the first cavity 401 arranged in a special-shaped variable-diameter manner can gradually increase the radial section in the cavity, and the cavity wall inside the first cavity 401 naturally transitions without dead angle area, so that the flow field of the gas to be treated entering the cavity can be made more uniform, the entire surface area of the treatment area of the dehumidification runner 201 can be effectively utilized, and the gas flow can be prevented from accumulating and concentrating on part of the surface of the treatment area, thereby improving the dehumidification efficiency of the dehumidification runner 201.

[0079] The second cavity 402 is isolated from the first cavity 401, and the second cavity 402 is used to be arranged at the air outlet side of the regeneration area of the dehumidification runner 201 and to discharge the regeneration gas.

[0080] As an example, the end face of the first cavity 401 and the second cavity 402 cooperating with the dehumidification runner 201 constitutes a circular coverage, and the other end face of the first cavity 401 is arranged as a circular interface for external piping and the like. The above-mentioned circular coverage can cover the end face of the dehumidification runner 201. For example, the area of the treatment area of the dehumidification runner 201 is three-fourths of the end face, and the area of the regeneration area is one-fourth of the end face, thereby constituting the complete end face of the dehumidification runner 201. Adaptively, the first cavity 401 is arranged as a three-fourth circular coverage corresponding to the area of the treatment area, and the second cavity 402 is arranged as a one-fourth circular coverage corresponding to the area of the regeneration area.

[0081] It should be noted that the first cavity 401 with one end as a circular interface and the other end as a three-fourth area end face is arranged in a special-shaped variable-diameter manner, so that the radial section of the first cavity 401 gradually increases, so that the flow field of the gas to be treated entering the cavity can be made more uniform, the entire surface area of the treatment area of the dehumidification runner 201 can be effectively utilized, and the gas flow can be prevented from accumulating and concentrating on part of the surface of the treatment area, thereby improving the dehumidification efficiency of the dehumidification runner 201.

[0082] Thus, the first sealing member is integrally formed by using a plastic structure with high strength and good temperature resistance. The cavity wall of the first cavity 401 of the first sealing member has a special structure with a gradually increasing radial cross-section, which makes the flow field discharged through the first cavity 401 more uniform, promotes the airflow to reach the entire processing area of the dehumidification runner 201, and makes the entire processing area of the runner surface become an effective utilization area, eliminating the dead angle area of the processing area, improving the dehumidification efficiency of the dehumidification runner 201, further improving the dehumidification effect of the dehumidifier 2 on the high-humidity gas to be processed in the cold storage, and effectively preventing frosting in the cold storage.

[0083] In some possible manners, referring to FIGS. 6, 7, 8 and 9, the dehumidifier 2 further includes a cabinet 6 and a second sealing member.

[0084] The cabinet 6 is used to install the dehumidification runner 201. It should be noted that the cabinet 6 needs to be strictly insulated inside and outside to prevent the cold bridge of the cold storage defrosting system from being formed at the dehumidifier 2.

[0085] The second sealing member is arranged at the air outlet side of the processing area of the dehumidification runner 201 and the air inlet side of the regeneration area. The second sealing member includes a third cavity 501 and a side opening 502. The third cavity 501 is arranged at the air outlet side of the processing area of the dehumidification runner 201 and is used to discharge the gas to be processed after being adsorbed and dehumidified. The side opening 502 is isolated from the third cavity 501 and is arranged at the air inlet side of the regeneration area of the dehumidification runner 201. It should be noted that the cavity wall of the third cavity 501 needs to be strictly insulated to avoid heat exchange between the dry gas in the third cavity 501 and the objects outside the cavity, and to reduce the temperature rise of the dry gas.

[0086] In the embodiment, referring to FIGS. 8 and 9, the dehumidifier 2 further includes at least two support members 601 which are detachably arranged inside the cabinet 6, and the dehumidification runner 201 is rotationally arranged between the adjacent two support members 601. It should be noted that an annular track or guide rail for rotation of the dehumidification runner 201 is arranged between the opposite surfaces of the adjacent two support members 601. The support member 601 is preferably a plate structure, and the annular track inside the plate structure of the support member 601 has a through opening structure, so that the processing area and the regeneration area of the dehumidification runner 201 can smoothly pass through the corresponding regeneration gas or gas to be processed.

[0087] The support 601 is provided with a driving component 602, a transmission belt, a tensioner 603 and a limit switch 604. The transmission belt is arranged on the dehumidification runner 201. The driving component 602 is in transmission connection with the transmission belt and is used to drive the dehumidification runner 201 to rotate. The tensioner 603 is used to tension the transmission belt. The limit switch 604 is used to trigger when the dehumidification runner 201 rotates to determine whether the dehumidification runner 201 rotates. It should be noted that the driving component 602 can be a transmission motor. The transmission motor is provided with a belt pulley connected with the transmission belt. The transmission belt is arranged on the dehumidification runner 201, the tensioner 603, the belt pulley and the limit switch 604. The transmission motor can drive the dehumidification runner 201 to rotate through the transmission belt. When the dehumidification runner 201 rotates one circle, the limit switch 604 triggers once. There is a time setting in the program setting in the dehumidifier system. If the limit switch 604 does not trigger the program within the time setting range, it is determined that the dehumidification runner 201 has a rotating failure or does not rotate, so as to realize the monitoring of the working process of the dehumidification runner 201.

[0088] In some possible ways, referring to FIGS. 3, 8 and 9, the dehumidifier 2 further comprises a processing air duct assembly and a regeneration air duct assembly.

[0089] The processing air duct assembly comprises a processing air fan 701. The air to be processed flows through the processing air inlet 202, the processing air fan 701, the first cavity 401 of the first sealing member, the processing area of the dehumidification runner 201, the third cavity 501 of the second sealing member and the processing air outlet 203 in sequence. The air outlet of the processing air fan 701 is in communication with the first cavity 401. The processing air outlet 203 is in communication with the third cavity 501. A filtering component for filtering dust can be arranged between the processing air inlet 202 and the processing air fan 701. The filtering component can filter and remove dust particles larger than 5 microns in the air to be processed, so as to prevent the processing area of the dehumidification runner 201 from being blocked.

[0090] The regeneration air duct assembly comprises a regeneration air fan 702. The air to be regenerated flows through the regeneration air inlet 204, the side opening 502, the regeneration area of the dehumidification runner 201, the second cavity 402 of the first sealing member, the regeneration air fan 702 and the regeneration air outlet 205 in sequence. The second cavity 402 is connected with the air inlet of the regeneration air fan 702. A filtering component is arranged between the regeneration air inlet 204 and the side opening 502. The filtering component can filter and remove dust particles larger than 5 microns in the air to be regenerated, so as to prevent the regeneration area of the dehumidification runner 201 from being blocked.

[0091] In a second aspect, the application also provides a cold storage defrosting method using the cold storage defrosting system described above, comprising: step S1: connecting the treatment air inlet 202 and the treatment air outlet 203 of the dehumidification device to the cold storage body 1; step S2: starting the dehumidification device, the treatment air inlet 202 inhales the to-be-treated gas in the cold storage body 1 into the dehumidification device and makes it pass through the treatment area of the dehumidification runner 201, and the dry gas discharged from the treatment area of the dehumidification runner 201 is re-delivered to the cold storage body 1 through the treatment air outlet 203. Wherein, step S2 includes step S201: the treatment air inlet 202 of the dehumidification device draws the to-be-treated gas from above the door 104, the treatment air outlet 203 discharges the dry gas and delivers it in the air supply pipe 102, the dry gas in the air supply pipe 102 blows to the refrigeration device 103 through the exhaust port 1023, and the frost on the refrigeration device 103 is removed. Wherein, step S2 also includes: while the dehumidifier adsorbs and dehumidifies the to-be-treated gas, the regeneration gas is heated by the electric heating component or by the heat exchange component 3 connected to the condensing end of the refrigeration device 103 or generated by the air heat source pump, flows through the regeneration area of the dehumidification runner 201 and desorbs and dehumidifies it, and then the regeneration gas after passing through the regeneration area of the dehumidification runner 201 is discharged through the regeneration air outlet 205.

[0092] Specifically, referring to FIGS. 10-11, the dehumidifier 2 is used as the dehumidification device, the treatment air inlet 202 of the dehumidifier is connected to the return air pipe 101, the treatment air outlet 203 is connected to the air supply pipe 102, the dehumidifier 2 is started, the high-humidity to-be-treated gas is sucked out from the bottom of the cold storage body 1, especially when the goods are put in and taken out of the cold storage body 1, the high-temperature and high-humidity air just entering from the outside above the door 104 of the cold storage body 1 can be sucked out through the extension pipe 1011, the dry gas after adsorption and dehumidification by the dehumidification runner 201 is discharged through the treatment air outlet 203, the dry gas enters the built-in section 1022 through the exposed section 1021, and blows to the refrigeration device 103 through the exhaust port 1023, gradually removing the frost on the refrigeration device 103. In this process, the condensation heat of the condensing end of the refrigeration device 103 can directly heat it through the heat exchange component 3, or the condensation heat of the condensing end of the refrigeration device 103 is cooled by the heat pump system 8, and then the condensation heat of the condensing end of the heat pump system 8 is used to heat the dehumidification runner 201 through the heat exchange component 3, so that the regeneration gas is heated by the heat exchange component 3 and sucked into the regeneration air inlet 204, realizing the desorption and regeneration of the dehumidification runner 201, and the high-humidity regeneration gas is discharged to the outside through the regeneration air outlet 205.

[0093] It should be noted that in the case of dehumidifier 2 including an electric heating component provided at the air inlet side of the regeneration zone of the dehumidification wheel 201, the regeneration air is heated by the electric heating component to meet the regeneration temperature of the dehumidification wheel 201 during the process of entering the dehumidifier 2 through the regeneration air inlet 204, and the dehumidification wheel 201 can also be desorbed and regenerated.

[0094] Therefore, the dehumidification device with the dehumidification wheel 201 is used to absorb and dehumidify the high-humidity gas to be treated from the bottom of the cold storage, and the dry gas is discharged from the top of the cold storage to the refrigeration device 103 through the exhaust port 1023 on the built-in section 1022, gradually removing the surface frost on the refrigeration device 103, achieving dehumidification and defrosting of the cold storage, the whole process without condensate water, no need to drain water, avoid the problem of incomplete dehumidification and defrosting caused by the remaining cold water in the cold storage not being completely drained and re-condensed, and in the process of dehumidification and defrosting of the cold storage, there is no obvious temperature fluctuation in the cold storage, avoiding the problem of closing the refrigeration system of the cold storage to raise the temperature of the cold storage when using electric defrosting and hot fluorine defrosting, reducing the energy consumption of the cold storage, at the same time, using the condensation heat generated by the operation of the cold storage to heat the desorption regeneration gas of the regeneration zone of the dehumidification wheel 201, fully utilizing the waste heat generated by the operation of the cold storage itself, more energy-saving.

Claims

1. A defrosting system for a cold store, wherein, The application relates to a refrigeration storage body (1) and a dehumidifying device. The dehumidifying device has a dehumidifying runner (201) with a treatment area and a regeneration area, and the dehumidifying device reduces the humidity in the refrigeration storage body (1) and removes frost in the refrigeration storage body (1) through the dehumidifying runner (201). The dehumidifying device has a treatment air inlet (202) and a treatment air outlet (203), the treatment air inlet (202) can draw the air to be treated from the refrigeration storage body (1), and the treatment air outlet (203) can deliver the dry air after being adsorbed and dehumidified by the dehumidifying runner (201) to the refrigeration storage body (1). The refrigeration storage body (1) is provided with a refrigeration device (103) for providing a cold source of the refrigeration storage body (1), and the treatment air outlet (203) delivers the dry air after being dehumidified to the refrigeration device (103) to remove the frost of the refrigeration device (103).

2. The cold storage defrosting system of claim 1, wherein, The refrigeration storage body (1) has a return air pipe (101) connected with the treatment air inlet (202) and a supply air pipe (102) connected with the treatment air outlet (203).

3. The cold store defrosting system according to claim 2, characterized in that, The dehumidifying device is located outside the refrigeration storage body (1), the supply air pipe (102) comprises an exposed section (1021) located outside the refrigeration storage body (1) and a built-in section (1022) located inside the refrigeration storage body (1), the exposed section (1021) is communicated with the built-in section (1022), and the built-in section (1022) is provided with a plurality of air outlets (1023) facing the refrigeration device (103).

4. The cold store defrosting system according to claim 3, wherein, The dehumidifying device is located inside the refrigeration storage body (1), and the supply air pipe (102) is provided with a plurality of air outlets (1023) facing the refrigeration device (103).

5. The cold storage defrosting system of claim 2, wherein, The refrigeration storage body (1) has a door (104), the return air pipe (101) is provided with an extension pipe (1011), and the air inlet end of the extension pipe (1011) is arranged above the door (104) to absorb the air entering the refrigeration storage body (1) through the door (104).

6. The cold store defrosting system according to claim 4 or 5, characterized in that, The dehumidifying device is a dehumidifier (2) having a regeneration air inlet (204) and a regeneration air outlet (205), the regeneration air inlet (204) is used for delivering the regeneration air to the air inlet side of the regeneration area of the dehumidifying runner (201) to desorb and regenerate the regeneration area of the dehumidifying runner (201), and the regeneration air outlet (205) is used for discharging the regeneration air discharged from the air outlet side of the regeneration area of the dehumidifying runner (201) from the dehumidifier (2).

7. The cold store defrosting system as claimed in claim 6, wherein, The treatment air inlet (202) is used for delivering the air to be treated to the air inlet side of the treatment area of the dehumidifying runner (201) to adsorb and dehumidify the air to be treated, and the treatment air outlet (203) is used for discharging the dry air discharged from the air outlet side of the treatment area of the dehumidifying runner (201) from the dehumidifier (2). ​ 8. The cold store defrosting system according to claim 7, characterized in that, The dehumidifier (2) further comprises an electric heating component arranged at the air inlet side of the regeneration area of the dehumidification runner (201) for increasing the temperature of the regeneration gas; or, The cold storage defrosting system further comprises a heat exchange component (3) for increasing the temperature of the regeneration gas, the heat exchange component (3) is arranged at the regeneration air inlet (204), and the heat exchange component (3) is connected to the condensing end of the refrigeration device (103) for increasing the temperature of the heat exchange component (3); or, The cold storage defrosting and dehumidifying system further comprises an air source heat pump (8) arranged at the regeneration air inlet (204) for providing regeneration gas for the dehumidification runner (201) to desorb and dehumidify in the regeneration area.

9. The cold storage defrosting system of claim 7, wherein, The dehumidifier (2) further comprises a first sealing member arranged at the air inlet side of the treatment area and the air outlet side of the regeneration area of the dehumidification runner (201), and the first sealing member comprises: A first cavity (401) gradually increasing in radial section along the flow direction of the to-be-treated gas, the first cavity (401) is arranged at the air inlet side of the treatment area of the dehumidification runner (201) and is used for guiding the to-be-treated gas to flow through the entire treatment area of the dehumidification runner (201); A second cavity (402) isolated from the first cavity (401), the second cavity (402) is arranged at the air outlet side of the regeneration area of the dehumidification runner (201) and is used for discharging the regeneration gas.

10. The cold store defrosting system according to claim 9, characterized in that, The dehumidifier (2) further comprises: A cabinet (6) for mounting the dehumidification runner (201); A second sealing member arranged at the air outlet side of the treatment area and the air inlet side of the regeneration area of the dehumidification runner (201), the second sealing member comprises a third cavity (501) and a side opening (502); the third cavity (501) is arranged at the air outlet side of the treatment area of the dehumidification runner (201) and is used for discharging the to-be-treated gas after adsorption and dehumidification, and the side opening (502) is isolated from the third cavity (501), and the side opening (502) is arranged at the air inlet side of the regeneration area of the dehumidification runner (201).

11. The cold store defrosting system according to claim 10, characterized in that, The dehumidifier (2) further comprises at least two support members (601) arranged inside the cabinet (6) in a detachable manner, and the dehumidification runner (201) is arranged between two adjacent support members (601) in a rotating manner; The support member (601) is provided with a driving component (602), a transmission belt, a tensioner (603) and a limit switch (604), the transmission belt is arranged on the dehumidification runner (201), the driving component (602) is connected to the transmission belt and is used for driving the dehumidification runner (201) to rotate, the tensioner (603) is used for tensioning the transmission belt, and the limit switch (604) is used for triggering when the dehumidification runner (201) rotates to determine whether the dehumidification runner (201) rotates.

12. The cold store defrosting system according to claim 10, characterized in that, The dehumidifier (2) further comprises a treatment air duct assembly and a regeneration air duct assembly; The processing air duct assembly comprises a processing air fan (701), and the gas to be processed flows through the processing air inlet (202), the processing air fan (701), the first cavity (401) of the first sealing element, the processing area of the dehumidification runner (201), the third cavity (501) of the second sealing element and the processing air outlet (203) in sequence. The regeneration air duct assembly comprises a regeneration air fan (702), and the regeneration gas flows through the regeneration air inlet (204), the regeneration area of the dehumidification runner (201), the second cavity (402) of the first sealing element, the regeneration air fan (702) and the regeneration air outlet (205) in sequence.

13. A method of defrosting a cold store, wherein, The method comprises the following steps: Step S1: connecting the processing air inlet (202) and the processing air outlet (203) of the dehumidification device to the cold storage body (1); Step S2: starting the dehumidification device, the processing air inlet (202) of the dehumidification device inhales the gas to be processed in the cold storage body (1) and makes it pass through the processing area of the dehumidification runner (201), and the dry gas discharged from the processing area of the dehumidification runner (201) is re-delivered to the cold storage body (1) through the processing air outlet (203).

14. The cold store defrosting method of claim 13, wherein, Step S2 comprises: Step S201: the processing air inlet (202) of the dehumidification device draws the gas to be processed from above the door (104), the processing air outlet (203) discharges the dry gas and delivers it in the air supply pipe (102), the dry gas in the air supply pipe (102) blows to the refrigeration device (103) through the exhaust port (1023), and the frost on the refrigeration device (103) is removed.

15. The cold store defrosting method of claim 13, wherein, Step S2 further comprises: Step S202: while the dehumidification device 2 adsorbs and dehumidifies the gas to be processed, the regeneration gas is heated by the electric heating component or by the heat exchange component (3) connected to the condensing end of the refrigeration device (103) or generated by the air source heat pump, flows through the regeneration area of the dehumidification runner (201) and desorbs and dehumidifies it, and then the regeneration gas after passing through the regeneration area of the dehumidification runner (201) is discharged through the regeneration air outlet (205).

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