A defrosting device, a fresh air conditioning unit, a defrosting control method and device

Abstract

This invention discloses a defrosting device, a fresh air conditioning unit, a defrosting control method, and an apparatus. The defrosting device includes: a dehumidifying component located at the air inlet, used to dehumidify the fresh air, which then flows to the evaporative cooling system; and a fan duct connecting the condenser in the evaporative cooling system to the dehumidifying component, allowing some of the air after heat exchange with the condenser to be blown through the fan duct to the dehumidifying component, thus regenerating it. This invention utilizes the dehumidifying component to dehumidify the fresh air entering the unit, reducing the air's moisture content, decreasing frost buildup on the evaporator, and even preventing frost formation altogether. Furthermore, the fan duct uses condensed hot air to remove the moisture absorbed by the dehumidifying component, fully recovering and utilizing the condensation heat to regenerate the dehumidifying component and ensure continuous dehumidification. This solves the problem of low energy efficiency in fresh air conditioning units due to evaporator frost, improving unit energy efficiency and ensuring long-term high-efficiency operation.

Description

Technical Field

[0001] This invention relates to the field of unit technology, and more specifically, to a defrosting device and a fresh air conditioning unit, a defrosting control method and device. Background Technology

[0002] For fresh air conditioning units, if the fresh air has a high humidity content and the internal evaporation temperature of the unit is below 0°C, frost will form on the surface of the evaporator. When the frost layer reaches a certain thickness, it will reduce the unit's energy efficiency.

[0003] For example, during the time an aircraft is parked at the boarding bridge and then departs, the aircraft's ground air conditioning system supplies air to the interior of the aircraft to provide a comfortable cabin environment for passengers and crew. Aircraft ground air conditioning systems are 100% fresh air units, and the fresh air has a relatively high humidity content. The supply air temperature must be below 2°C, and the internal evaporation temperature is generally below 0°C, while the condensation temperature is 60°C. At these temperatures, frost will form on the evaporator surface. If the frost layer reaches a certain thickness and is not removed promptly, it will significantly reduce the heat exchanger's efficiency, resulting in a substantial decrease in the unit's energy efficiency ratio. Furthermore, aircraft ground air conditioning systems typically use hot air bypass defrosting, which affects the supply air temperature during defrosting, reducing passenger comfort.

[0004] There is currently no effective solution to the problem of low energy efficiency in existing fresh air conditioning units due to evaporator frost formation. Summary of the Invention

[0005] This invention provides a defrosting device, a fresh air conditioning unit, a defrosting control method, and a device to at least solve the problem of low energy efficiency in existing fresh air conditioning units due to evaporator frost.

[0006] To address the aforementioned technical problems, embodiments of the present invention provide an anti-frost device, comprising:

[0007] A dehumidifying component is installed at the air inlet. The dehumidifying component is used to dehumidify the fresh air, and the dehumidified fresh air flows to the evaporative cooling system.

[0008] A duct connects the condenser in the evaporative cooling system to the dehumidification component, so that part of the air after heat exchange with the condenser is blown through the duct to the dehumidification component, thereby regenerating the dehumidification component.

[0009] Optionally, a rotating bearing is provided at the center of the dehumidification component. The dehumidification component includes a dehumidification area and a regeneration area. The area opposite to the port position of the air duct is the regeneration area, and the area opposite to the air inlet is the dehumidification area.

[0010] Optionally, the dehumidification area is located inside the unit, and the regeneration area is located outside the unit.

[0011] Optionally, the dehumidification component includes at least two silica gel adsorption fins arranged in a regular pattern.

[0012] Optionally, a baffle plate is provided after the dehumidifier, following the direction in which part of the air after heat exchange in the condenser is blown towards the dehumidifier.

[0013] Optionally, along the air intake direction at the air inlet, a first moisture content detection module is provided before the dehumidification component, and a second moisture content detection module is provided after the dehumidification component.

[0014] Optionally, the above-mentioned defrosting device further includes: a pre-cooling condenser, connected between the compressor's exhaust port and the refrigerant inlet of the condenser, and disposed between the dehumidification component and the air duct port opposite to the dehumidification component; the pre-cooling condenser is used to exchange heat between the refrigerant discharged from the compressor and a portion of the air after heat exchange with the condenser, so that the air after heat exchange is blown toward the dehumidification component.

[0015] This invention also provides a fresh air conditioning unit, including: the defrosting device described in this invention.

[0016] Optionally, the fresh air conditioning unit includes at least two stages of evaporative cooling system arranged sequentially along the air inlet direction, with the dehumidification component arranged before the first-stage evaporator along the air inlet direction; and a duct is provided for at least the first-stage condenser.

[0017] Optionally, separate air ducts can be installed for the first-stage condenser and the second-stage condenser respectively; if a pre-cooling condenser is installed, separate pre-cooling condensers can be installed for the first-stage evaporative cooling system and the second-stage evaporative cooling system respectively.

[0018] Optionally, the fresh air conditioning unit is an aircraft ground air conditioning system.

[0019] This invention also provides a defrosting control method, applied to the defrosting device described in this invention. The defrosting control method includes: obtaining the moisture content difference before and after the dehumidification component; and controlling the rotation of the dehumidification component based on the moisture content difference.

[0020] Optionally, controlling the rotation of the dehumidification component based on the moisture content difference includes: if the moisture content difference is less than or equal to a preset threshold, controlling the dehumidification component to rotate half a revolution; if the moisture content difference is greater than the preset threshold, then not rotating the dehumidification component.

[0021] Optionally, if the moisture content difference is less than or equal to a preset threshold, the method further includes: determining whether the time interval between the current moment and the last time the dehumidifier was rotated is greater than or equal to a preset time; if so, controlling the dehumidifier to rotate half a revolution.

[0022] Optionally, obtaining the moisture content difference before and after the dehumidification component includes: obtaining the air moisture content of the fresh air entering from the air inlet detected by the first moisture content detection module, and recording it as the first moisture content; obtaining the air moisture content after passing through the dehumidification component detected by the second moisture content detection module, and recording it as the second moisture content; calculating the difference between the first moisture content and the second moisture content to obtain the moisture content difference.

[0023] This invention also provides a defrosting control device, applied to the defrosting device described in this invention, the defrosting control device comprising:

[0024] The acquisition module is used to acquire the difference in moisture content before and after the dehumidification component;

[0025] The control module is used to control the rotation of the dehumidification component based on the moisture content difference.

[0026] This invention also provides a non-volatile computer-readable storage medium storing a computer program thereon, which, when executed by a processor, implements the steps of the method described in this invention.

[0027] By applying the technical solution of this invention, the dehumidification component dehumidifies the fresh air entering the unit, reducing the air humidity content. This reduces the amount of frost forming on the evaporator within the unit, alleviating the evaporator frost problem, and even preventing frost formation altogether. Furthermore, the condensed hot air from the dehumidification component is carried away by the duct, enabling its regeneration. This fully and effectively recovers and utilizes the condensation heat, providing conditions for the regeneration of the dehumidification component and ensuring continuous dehumidification. This solves the problem of low energy efficiency in fresh air conditioning units caused by evaporator frost, improving unit energy efficiency and ensuring long-term high-efficiency operation. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of the anti-frost device provided in Embodiment 1 of the present invention. Figure 1 ;

[0029] Figure 2 This is a schematic diagram of the anti-frost device provided in Embodiment 1 of the present invention. Figure 2 ;

[0030] Figure 3 This is a schematic diagram of the dehumidification component provided in Embodiment 1 of the present invention;

[0031] Figure 4 This is a schematic diagram of the anti-frost device provided in Embodiment 1 of the present invention. Figure 3 ;

[0032] Figure 5 This is a schematic diagram of the refrigerant circulation in the evaporative cooling system provided in Embodiment 1 of the present invention;

[0033] Figure 6 This is a schematic diagram of an aircraft ground air conditioner provided in Embodiment 2 of the present invention;

[0034] Figure 7 This is a flowchart of the anti-frost control method provided in Embodiment 3 of the present invention;

[0035] Figure 8 This is a flowchart of the dehumidification component rotation control provided in Embodiment 3 of the present invention;

[0036] Explanation of reference numerals in the attached figures:

[0037] Air inlet 1, air outlet 2, dehumidification component 10, rotary bearing 11, silica gel adsorption fin tube 12, wind baffle 13, first moisture content detection module 14, second moisture content detection module 15, air duct 20, evaporative cooling system 30, condenser 31, evaporator 32, compressor 33, throttling element 34, bypass defrost solenoid valve 35, pre-cooling condenser 40;

[0038] First-stage evaporator 51, first-stage condenser 52, second-stage evaporator 61, second-stage condenser 62, first pre-cooling condenser 41, second pre-cooling condenser 42, third-stage evaporator 71, third-stage condenser 72, fourth-stage evaporator 81, fourth-stage condenser 82, condenser fan 90, centrifugal fan 3. Detailed Implementation

[0039] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this invention, and not all of them. Based on the embodiments of this invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this invention.

[0040] It should be noted that the terms "first," "second," etc., used in the specification, claims, and drawings of this invention are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of the invention described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0041] Example 1

[0042] This embodiment provides a defrosting device that can be applied to a fresh air conditioning unit. A fresh air conditioning unit is a unit that sends processed outdoor fresh air into a target area. For example, the outdoor fresh air can be processed through an evaporative cooling system.

[0043] Figure 1 This is a schematic diagram of the anti-frost device provided in Embodiment 1 of the present invention, as shown below. Figure 1 As shown, the defrosting device includes a dehumidifying component 10 and a fan duct 20.

[0044] A dehumidification unit 10 is installed at the air inlet 1. The dehumidification unit 10 is used to dehumidify the fresh air entering the unit from the air inlet 1. The dehumidified fresh air flows to the evaporative cooling system 30. After being processed by the evaporative cooling system 30, the dehumidified fresh air is sent to the target area through the air outlet 2.

[0045] The air duct 20 connects the condenser 31 in the evaporative cooling system 30 with the dehumidification component 10, so that part of the air after heat exchange in the condenser 31 is blown through the air duct 20 to the dehumidification component 10, thereby regenerating the dehumidification component 10.

[0046] Among them, the evaporative cooling system 30 has a refrigerant circulation loop, which refers to the refrigerant circulation loop mainly composed of compressor 33 ( Figure 1 Not shown, see Figure 5 ), condenser 31, throttling element 34 ( Figure 1 Not shown, see Figure 5 The dehumidifier 10 forms a circuit with the evaporator 32. The dehumidifier 10 can absorb moisture from the fresh air and can be regenerated, and can continue to absorb moisture after regeneration.

[0047] The defrosting device in this embodiment uses the dehumidification component 10 to dehumidify the fresh air entering the unit, reducing the air humidity and thus reducing the amount of frost on the evaporator inside the unit, alleviating the evaporator frost problem, or even preventing frost from forming on the evaporator. Furthermore, the condensed hot air through the air duct 20 carries away the moisture absorbed by the dehumidification component 10, realizing the regeneration of the dehumidification component 10, and fully and effectively recovering and utilizing the condensation heat, providing conditions for the regeneration of the dehumidification component 10 and ensuring continuous dehumidification. This solves the problem of low energy efficiency in fresh air conditioning units caused by evaporator frost, improves the unit's energy efficiency, and ensures long-term high-efficiency operation of the unit.

[0048] like Figure 2 As shown, a rotary bearing 11 is provided at the center of the dehumidification component 10. The dehumidification component 10 includes a dehumidification area and a regeneration area. The area opposite to the port position of the air duct 20 is the regeneration area, and the area opposite to the air inlet 1 is the dehumidification area. The rotary bearing 11 allows the dehumidification component 10 to rotate, thereby realizing the switching between the regeneration area and the dehumidification area, ensuring the dehumidification and regeneration cycle, and thus ensuring the dehumidification effect.

[0049] The first port of the air duct 20 is positioned opposite to the first air outlet of the condenser 31, and the second port of the air duct 20 is positioned opposite to the regeneration area of ​​the dehumidification unit 10. A condenser fan 90 is provided at the first air outlet of the condenser 31, which provides power to drive a portion of the air after heat exchange in the condenser 31 into the air duct 20. The second air outlet of the condenser 31 directs another portion of the air after heat exchange in the condenser 31 to the unit's air outlet 2.

[0050] Furthermore, the dehumidification area is located inside the unit, while the regeneration area is located outside the unit.

[0051] The dehumidification component 10 can be a symmetrical, regular shape, such as a rectangle or a circle. The dehumidification component 10 can be symmetrically installed on the unit, that is, one part is located inside the unit as the dehumidification area, and the other part is located outside the unit as the regeneration area.

[0052] The dehumidifying component 10 can be made of silicone, also known as a silicone disc or silicone wheel. The dehumidifying component 10 includes at least two silicone adsorption fins 12 arranged in a regular pattern. The silicone adsorption fins 12 effectively absorb moisture from the air, achieving a good dehumidification effect. The at least two silicone adsorption fins 12 can be arranged in at least one of the following ways: horizontal, vertical, or diagonal. Figure 3 As shown, the silica gel adsorption ribs 12 are evenly distributed across the entire dehumidification component 10 in a horizontal and vertical arrangement.

[0053] In one implementation, reference Figure 2A portion of the air after heat exchange in the condenser 31 is blown towards the dehumidification unit 10. A baffle 13 is installed after the dehumidification unit 10. The baffle 13 outside the unit can prevent the moisture carried away by the hot air from being drawn back into the evaporator side through the air inlet 1, thereby affecting the cooling and dehumidification effect.

[0054] refer to Figure 2 Along the air intake direction at air inlet 1, a first moisture content detection module 14 is installed before the dehumidification component 10, and a second moisture content detection module 15 is installed after the dehumidification component 10. Both the first and second moisture content detection modules 14 and 15 are located inside the unit. Specifically, the second moisture content detection module 15 is located after the dehumidification component 10 and before the evaporator 32. The first moisture content detection module 14 is used to detect the moisture content of the fresh air entering the unit from air inlet 1. The second moisture content detection module 15 is used to detect the moisture content of the air after passing through the dehumidification component 10. By using the first moisture content detection module 14 and the second moisture content detection module 15, the difference in moisture content before and after the dehumidification component 10 can be determined. Then, the rotation of the dehumidification component 10 can be controlled according to the difference in moisture content before and after the dehumidification component 10. This allows the regeneration zone and the dehumidification zone to be switched in a timely manner according to the actual dehumidification capacity of the dehumidification component 10, so that the dehumidification component 10 can be regenerated in a timely manner, realize recycling, ensure effective dehumidification of fresh air, and reduce or avoid evaporator frost formation.

[0055] like Figure 4 and Figure 5 As shown, the aforementioned defrosting device may further include: a pre-cooling condenser 40, connected between the exhaust port of the compressor 33 and the refrigerant inlet of the condenser 31, and disposed between the dehumidification component 10 and the port of the air duct 20 opposite to the dehumidification component 10. The pre-cooling condenser 40 is used to exchange heat between the refrigerant discharged from the compressor 33 and a portion of the air after heat exchange with the condenser 31, so that the heat-exchanged air is blown towards the dehumidification component 10. The pre-cooling condenser 40 may be a finned tube heat exchanger.

[0056] The refrigerant discharged from compressor 33 first enters pre-cooling condenser 40 for pre-cooling, and then enters condenser 31 for re-condensation. The condensed refrigerant then passes through throttling element 34 and evaporator 32 before returning to compressor 33. Bypass defrosting solenoid valve 35 is used to directly introduce a portion of the refrigerant discharged from compressor 33 into evaporator 32 for defrosting.

[0057] Part of the air discharged from condenser 31 exchanges heat with the refrigerant in pre-cooling condenser 40 through air duct 20, achieving pre-cooling of the refrigerant and increasing the air temperature. The high-temperature condensed hot air carries away the moisture absorbed by dehumidifying component 10, providing heat for the regeneration of dehumidifying component 10, which can improve the regeneration speed of dehumidifying component 10 and ensure better regeneration effect. Furthermore, the pre-cooling condenser 40 is close to dehumidifying component 10. For example, without affecting the rotation of dehumidifying component 10, the pre-cooling condenser 40 is set close to dehumidifying component 10, so that sensible heat exchange can be utilized, which is beneficial to the regeneration of dehumidifying component 10.

[0058] This embodiment adds a pre-cooling condenser 40, which increases the condensing heat exchange area and refrigerant charge through pre-cooling, thereby increasing the unit's subcooling and improving unit energy efficiency. Combining unit condensing pre-cooling with the regeneration of the dehumidification component 10 improves unit energy efficiency while rapidly regenerating the dehumidification component 10.

[0059] Example 2

[0060] This embodiment provides a fresh air conditioning unit, including the defrosting device described in the above embodiment. The fresh air conditioning unit includes an air inlet 1 and an air outlet 2. Fresh air entering the unit from the air inlet 1 is processed by the evaporative cooling system and then delivered to the target area through the air outlet 2.

[0061] The fresh air conditioning unit of this embodiment uses a dehumidifier 10 to dehumidify the incoming fresh air, reducing the humidity content of the air. This reduces the amount of frost on the evaporator inside the unit, alleviating the evaporator frost problem, and even preventing frost formation. Furthermore, the condensed hot air from the duct 20 carries away the moisture absorbed by the dehumidifier 10, enabling the regeneration of the dehumidifier 10. This fully and effectively recovers and utilizes the condensation heat, providing conditions for the regeneration of the dehumidifier 10 and ensuring continuous dehumidification. This solves the problem of low energy efficiency caused by evaporator frost in the fresh air conditioning unit, improves the unit's energy efficiency, and ensures long-term high-efficiency operation of the unit.

[0062] In one embodiment, the fresh air conditioning unit includes at least two stages of evaporative cooling systems arranged sequentially along the air inlet direction. Along the air inlet direction, the dehumidification component 10 is positioned before the first-stage evaporator, meaning that the fresh air dehumidified by the dehumidification component 10 first enters the first-stage evaporative cooling system. Furthermore, a duct 20 is provided for at least the first-stage condenser, meaning that the condensation heat in the first-stage evaporative cooling system is recovered and utilized to regenerate the dehumidification component 10. If a pre-cooling condenser is provided, it is provided for at least the first-stage evaporative cooling system.

[0063] Specifically, separate air ducts 20 can be installed for the first-stage condenser and the second-stage condenser, respectively. The air outlets of the two air ducts can be evenly directed to the entire regeneration area of ​​the dehumidification unit 10, or they can be directed to different locations within the regeneration area. If pre-cooling condensers are installed, separate pre-cooling condensers can be installed for the first-stage evaporative cooling system and the second-stage evaporative cooling system.

[0064] The fresh air conditioning unit in this embodiment can be an aircraft ground air conditioning system.

[0065] The following is combined Figure 6 The examples provided are for illustrative purposes only; however, it is important to note that these examples are merely for better illustrating the present application and do not constitute an undue limitation thereof. Explanations of terms identical or corresponding to those in the above embodiments will not be repeated here.

[0066] like Figure 6 The diagram shows a schematic of an aircraft ground air conditioning system. The system comprises a four-stage evaporative cooling system arranged sequentially. Driven by a centrifugal fan 3, fresh air enters the unit through the air inlet 1. The incoming fresh air flows sequentially through heat exchangers in each stage of the evaporative cooling system to lower the supply air temperature to the target temperature, for example, 2°C. It is then delivered to the target area through the air outlet 2. The fourth-stage evaporator 81 is prone to frosting due to its low evaporation temperature, requiring the unit to use hot air bypass defrosting. Furthermore, the unit's condensing temperature is too high, resulting in low unit efficiency.

[0067] In this embodiment, a dehumidifying component 10 is installed before the first-stage evaporator 51 to dehumidify the incoming fresh air in a timely manner. Separate air ducts 20 are provided for the first-stage condenser 52 and the second-stage condenser 62. A first pre-cooling condenser 41 and a second pre-cooling condenser 42 are added to the first two stages of the evaporative cooling system. Specifically, a first pre-cooling condenser 41 is added between the exhaust port of the first-stage compressor (not shown) and the refrigerant inlet of the first-stage condenser 52, and a second pre-cooling condenser 42 is added between the exhaust port of the second-stage compressor (not shown) and the refrigerant inlet of the second-stage condenser 62. Both the first and second pre-cooling condensers 41 and 42 are positioned between the dehumidifying component 10 and the port of the air duct 20 opposite to the dehumidifying component 10 to facilitate heat exchange.

[0068] Taking the first-stage evaporative cooling system as an example, the refrigerant discharged from the first-stage compressor is pre-cooled by the first pre-cooling condenser 41 and then condensed again in the first-stage condenser 52. Pre-cooling increases the condensation heat exchange area, increases the refrigerant charge, increases the subcooling degree of the unit, and improves the unit's energy efficiency. The condenser fan 90 draws part of the air discharged from the first-stage condenser 52 through the air duct 20 to exchange heat with the refrigerant in the first pre-cooling condenser 41. The high-temperature condensed hot air carries away the moisture absorbed by the saturated dehumidification component 10, providing heat for the regeneration of the dehumidification component 10.

[0069] In the aforementioned aircraft ground air conditioning system, the dehumidification component 10 dehumidifies the incoming fresh air, which reduces the amount of frost on the downstream evaporator, or even prevents it from frost-free, thus avoiding a decrease in passenger comfort due to defrosting. The addition of a pre-cooling condenser allows some of the hot air discharged from the condenser to exchange heat with the refrigerant in the pre-cooling condenser. Finally, the high-temperature condensed air is blown towards the dehumidification component 10, removing moisture from the saturated component and providing heat for its regeneration. Pre-cooling effectively increases the unit's subcooling, thereby improving the unit's energy efficiency. Combining condenser pre-cooling with the regeneration of the dehumidification component 10 improves unit energy efficiency while also fully recovering and utilizing residual condensation heat, ensuring long-term efficient operation of the unit.

[0070] Example 3

[0071] This embodiment provides a method for controlling frost suppression, which is applied to the frost suppression device described in the above embodiment. Figure 7 This is a flowchart of the frost suppression control method provided in Embodiment 3 of the present invention, as follows: Figure 7 As shown, the method includes the following steps:

[0072] S701, obtain the moisture content difference before and after the dehumidification component 10.

[0073] S702 controls the rotation of the dehumidification component 10 based on the difference in moisture content.

[0074] The difference in moisture content before and after the dehumidification component 10 reflects its dehumidification capacity. Specifically, the rotation of the dehumidification component 10 can be achieved by controlling the rotating bearing 11 at the center of the dehumidification component 10 using an electromagnetic switch.

[0075] In this embodiment, the rotation of the dehumidification component 10 is controlled based on the difference in moisture content before and after the dehumidification component 10. The regeneration zone and the dehumidification zone can be switched in a timely manner according to the actual dehumidification capacity of the dehumidification component 10, so that the dehumidification component 10 can be regenerated in a timely manner, realize recycling, ensure effective dehumidification of fresh air, and avoid frost formation on the evaporator.

[0076] In one embodiment, controlling the rotation of the dehumidification component 10 based on the moisture content difference includes: if the moisture content difference is less than or equal to a preset threshold, controlling the dehumidification component 10 to rotate half a turn; if the moisture content difference is greater than the preset threshold, then not rotating the dehumidification component 10. The preset threshold can be set according to actual conditions; if the moisture content difference before and after the dehumidification component 10 is greater than the preset threshold, it indicates that the dehumidification component 10 can still absorb moisture normally.

[0077] In this embodiment, when the moisture content difference is less than or equal to a preset threshold, the dehumidification component 10 is controlled to rotate half a revolution to switch between the regeneration zone and the dehumidification zone, thereby ensuring the recycling of the dehumidification component 10.

[0078] In one embodiment, if the moisture content difference is less than or equal to a preset threshold, the method further includes: determining whether the time interval between the current moment and the last time the dehumidifier 10 was rotated is greater than or equal to a preset time; if so, controlling the dehumidifier 10 to rotate half a revolution.

[0079] The preset time can be set according to the actual situation. For example, the preset time can be set to 30 minutes. If the time interval between the current time and the last time the dehumidifier 10 rotates is greater than or equal to the preset time, it means that the current dehumidification area of ​​the dehumidifier 10 has basically absorbed enough moisture and needs to be rotated into a regeneration area for regeneration. In addition, the current regeneration area of ​​the dehumidifier 10 has been fully regenerated and can be rotated into a dehumidification area for the next moisture absorption.

[0080] When the unit is not turned on and has been stored for a long time, the dehumidifier 10 will still absorb moisture, and may become saturated and unable to absorb any more moisture. When the unit is turned on, the initial moisture content of the dehumidifier 10 before and after operation is not significantly different, at which point the dehumidifier 10 will rotate. However, the regeneration of the dehumidifier 10 requires time. Incorporating a time condition as a criterion can prevent the dehumidifier 10 from continuously rotating based solely on the moisture content difference when the unit is first turned on. Of course, during normal operation of the unit, both the moisture content difference and the time condition can be used simultaneously to control the rotation of the dehumidifier 10 to ensure accurate control.

[0081] In one embodiment, obtaining the moisture content difference before and after the dehumidification component 10 includes: obtaining the air moisture content of the fresh air entering from the air inlet detected by the first moisture content detection module 14, and recording it as the first moisture content; obtaining the air moisture content after passing through the dehumidification component 10 detected by the second moisture content detection module 15, and recording it as the second moisture content; and calculating the difference between the first moisture content and the second moisture content to obtain the moisture content difference. This embodiment utilizes the first moisture content detection module 14 and the second moisture content detection module 15 to quickly and reliably determine the moisture content difference before and after the dehumidification component 10.

[0082] The following is combined Figure 8 The examples provided are for illustrative purposes only; however, it is important to note that these examples are merely for better illustrating the present application and do not constitute an undue limitation thereof. Explanations of terms identical or corresponding to those in the above embodiments will not be repeated here.

[0083] like Figure 8 As shown, the rotation of the dehumidification component 10 is achieved by controlling the rotating bearing 11 with an electromagnetic switch. The rotation control process of the dehumidification component 10 includes the following steps:

[0084] S801, Start.

[0085] S802, detect the moisture content difference H before and after the dehumidification component 10.

[0086] S803, determine whether H > N is satisfied. If yes, proceed to S804; otherwise, proceed to S806. N represents the preset threshold.

[0087] S804, the electromagnetic switch is not working.

[0088] S805, silica gel adsorption dehumidification, then return to S802 for further testing.

[0089] S806, determine if the current time is greater than or equal to 30 minutes from the last rotation time. If yes, proceed to S807; otherwise, return to S802 to continue the detection.

[0090] S807, the electromagnetic switch adjusts the rotation of the rotary bearing 11 by half a revolution, and then proceeds to S805.

[0091] It should be noted that the steps shown in the flowchart in the accompanying drawings can be executed in a computer system such as a set of computer-executable instructions, and although a logical order is shown in the flowchart, in some cases the steps shown or described may be executed in a different order than that shown here.

[0092] Example 4

[0093] Based on the same inventive concept, this embodiment provides a defrosting control device, applied to the defrosting device described in the above embodiments, and can be used to implement the defrosting control method described in the above embodiments. This defrosting control device can be implemented through software and / or hardware, and is generally integrated into the unit's controller.

[0094] The anti-frost control device includes:

[0095] The acquisition module is used to acquire the difference in moisture content before and after the dehumidification component 10;

[0096] The control module is used to control the rotation of the dehumidification component 10 according to the moisture content difference.

[0097] Optionally, the control module includes:

[0098] The first control unit is used to control the dehumidification component 10 to rotate half a revolution if the moisture content difference is less than or equal to a preset threshold.

[0099] The second control unit is configured to not rotate the dehumidification component 10 if the moisture content difference is greater than the preset threshold.

[0100] Optionally, the first control unit is further configured to determine whether the time interval between the current moment and the last time the dehumidification component 10 was rotated is greater than or equal to a preset time when the moisture content difference is less than or equal to a preset threshold; if so, control the dehumidification component 10 to rotate half a revolution.

[0101] Optionally, the acquisition module includes:

[0102] The first acquisition unit is used to acquire the air humidity of the fresh air entering from the air inlet detected by the first humidity detection module, and record it as the first humidity content;

[0103] The second acquisition unit is used to acquire the air humidity after passing through the dehumidification component 10, which is detected by the second humidity detection module, and is recorded as the second humidity content.

[0104] The calculation unit is used to calculate the difference between the first moisture content and the second moisture content to obtain the moisture content difference.

[0105] The aforementioned anti-frost control device can execute the anti-frost control method provided in the embodiments of the present invention, and has the corresponding functional modules and beneficial effects of the method. Technical details not described in detail in this embodiment can be found in the anti-frost control method provided in the embodiments of the present invention.

[0106] Example 5

[0107] This embodiment provides a non-volatile computer-readable storage medium on which a computer program is stored, and when the computer program is executed by a processor, it implements the steps of the method described in the above embodiment.

[0108] The device embodiments described above are merely illustrative. The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the modules can be selected to achieve the purpose of this embodiment according to actual needs.

[0109] Through the above description of the embodiments, those skilled in the art can clearly understand that each embodiment can be implemented by means of software plus necessary general-purpose hardware platforms, and of course, it can also be implemented by hardware. Based on this understanding, the above technical solutions, in essence or the part that contributes to the prior art, can be embodied in the form of a software product. This computer software product can be stored in a computer-readable storage medium, such as ROM / RAM, magnetic disk, optical disk, etc., and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute the methods described in the various embodiments or some parts of the embodiments.

[0110] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A defrosting device, characterized in that, include: A dehumidifying component is installed at the air inlet. The dehumidifying component is used to dehumidify the fresh air, and the dehumidified fresh air flows to the evaporative cooling system. A duct connects the condenser in the evaporative cooling system to the dehumidification component, so that part of the air after heat exchange with the condenser is blown through the duct to the dehumidification component, thereby regenerating the dehumidification component. Along the air intake direction at the air inlet, a first moisture content detection module is provided before the dehumidification component, and a second moisture content detection module is provided after the dehumidification component; A precooling condenser is connected between the compressor's exhaust port and the condenser's refrigerant inlet, and is disposed between the dehumidification component and the air duct port opposite to the dehumidification component; the precooling condenser is used to exchange heat between the refrigerant discharged from the compressor and a portion of the air after heat exchange with the condenser, so that the heat-exchanged air is blown toward the dehumidification component.

2. The anti-frost device according to claim 1, characterized in that, The dehumidification component has a rotating bearing at its center. The dehumidification component includes a dehumidification area and a regeneration area. The area opposite to the port of the air duct is the regeneration area, and the area opposite to the air inlet is the dehumidification area.

3. The anti-frost device according to claim 2, characterized in that, The dehumidification area is located inside the unit, and the regeneration area is located outside the unit.

4. The anti-frost device according to claim 1, characterized in that, The dehumidification component includes at least two silica gel adsorption ribs arranged in a regular pattern, wherein the at least two silica gel adsorption ribs are arranged in at least one of the following ways: horizontal arrangement, vertical arrangement, and diagonal arrangement.

5. The anti-frost device according to claim 1, characterized in that, A portion of the air after heat exchange in the condenser is blown toward the dehumidification component, and a baffle plate is provided behind the dehumidification component.

6. A new type of fresh air conditioning unit, characterized in that, include: The anti-frost device according to any one of claims 1 to 5.

7. The fresh air conditioning unit according to claim 6, characterized in that, The fresh air conditioning unit includes at least two stages of evaporative cooling system arranged sequentially along the air intake direction, with the dehumidification component arranged before the first-stage evaporator along the air intake direction; and a duct is provided for at least the first-stage condenser.

8. The fresh air conditioning unit according to claim 7, characterized in that, Separate air ducts are installed for the first-stage condenser and the second-stage condenser respectively; if a pre-cooling condenser is installed, separate pre-cooling condensers are installed for the first-stage evaporative cooling system and the second-stage evaporative cooling system respectively.

9. The fresh air conditioning unit according to any one of claims 6 to 8, characterized in that, The aforementioned fresh air conditioning unit is an aircraft ground air conditioning system.

10. A method for controlling frost suppression, characterized in that, The anti-frost device applied to any one of claims 1 to 5, the anti-frost control method comprising: Obtain the moisture content difference before and after the dehumidification component; The rotation of the dehumidification component is controlled based on the moisture content difference.

11. The method according to claim 10, characterized in that, Controlling the rotation of the dehumidification component based on the moisture content difference includes: If the moisture content difference is less than or equal to a preset threshold, the dehumidification component is controlled to rotate half a revolution. If the moisture content difference is greater than the preset threshold, the dehumidification component will not rotate.

12. The method according to claim 11, characterized in that, If the moisture content difference is less than or equal to a preset threshold, the method further includes: Determine whether the time interval between the current moment and the last time the dehumidification component was rotated is greater than or equal to a preset time; If so, then control the dehumidification component to rotate half a revolution.

13. The method according to any one of claims 10 to 12, characterized in that, Obtain the moisture content difference before and after the dehumidification component, including: The humidity content of the fresh air entering from the air inlet, as detected by the first humidity content detection module, is recorded as the first humidity content. The humidity of the air after passing through the dehumidification component is obtained by the second humidity detection module and recorded as the second humidity. The difference between the first moisture content and the second moisture content is calculated to obtain the moisture content difference.

14. A frost suppression control device, characterized in that, The anti-frost device applied to any one of claims 1 to 5, the anti-frost control device comprising: The acquisition module is used to acquire the difference in moisture content before and after the dehumidification component; The control module is used to control the rotation of the dehumidification component based on the moisture content difference.

15. A non-volatile computer-readable storage medium having a computer program stored thereon, characterized in that, When the computer program is executed by a processor, it implements the steps of the method according to any one of claims 10 to 13.

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