Air-cooling dehumidification device, air conditioning unit and air-cooling dehumidification control method

Abstract

The invention provides an air cooling dehumidification device, an air conditioning unit and an air cooling dehumidification control method.The dehumidification device is characterized in that an air duct body is installed on the outer side of an evaporator, the air duct body is provided with an inner air inlet and an inner air outlet, the inner air inlet faces an outer air inlet, and the inner air outlet faces the front face of a controller; the dehumidification cavity is arranged in the air duct main body, and the dehumidification cavity is filled with a drying agent; according to the air cooling dehumidification device, moisture in the air is absorbed through the drying agent, then the air dried through the air cooling dehumidification device flows through the front face of the controller, and water vapor is prevented from being condensed on the controller while heat dissipation of the controller is achieved through the air.

Description

Technical Field

[0001] The present invention belongs to the field of air conditioning equipment, and more specifically, relates to an air-cooling dehumidification device, an air-conditioning unit and an air-cooling dehumidification control method. Background Art

[0002] In commercial heat pump air conditioning systems, due to the high current, the heat generated by the controller is very large, and heat dissipation has become a problem that must be solved. There are usually two types of heat dissipation methods: air cooling and refrigerant heat dissipation. Refrigerant heat dissipation has a better effect, but for air conditioning units with higher current, the heat dissipation is still insufficient. Air cooling generally allows air to blow over the back of the controller to prevent water vapor in the air from condensing on the front of the controller and damaging the controller. Summary of the invention

[0003] The object of the present invention is to provide an air-cooling dehumidification device, an air-conditioning unit and an air-cooling dehumidification control method to solve the problem that condensation is easily generated on the controller in the existing air-cooling heat dissipation method.

[0004] To achieve the above object, the technical solution adopted by the present invention is:

[0005] The present invention first provides an air-cooled dehumidification device, which is arranged in an air conditioning unit, wherein the air conditioning unit comprises a casing with an external air inlet and an external air outlet, and an evaporator and a controller arranged in the casing, wherein the dehumidification device comprises:

[0006] An air duct body is installed on the outside of the evaporator, and the air duct body has an inner air inlet and an inner air outlet, the inner air inlet is arranged toward the outer air inlet, and the inner air outlet is arranged toward the front of the controller;

[0007] The dehumidification cavity is arranged in the air duct main body, and the dehumidification cavity is filled with a desiccant.

[0008] Furthermore, the dehumidification cavity is provided with a receiving channel for the copper tube on the evaporator to extend into, and the inner wall of the receiving channel is provided with an anti-wear material layer.

[0009] Furthermore, a grid plate for limiting the movement of the desiccant is provided in the dehumidification cavity.

[0010] Furthermore, the inner air inlet and the inner air outlet are located on both sides of the air duct body, and the height of the inner air inlet is lower than the height of the inner air outlet.

[0011] Furthermore, shutters are installed at the inner air inlet and the inner air outlet.

[0012] The present invention also provides an air conditioning unit, comprising a casing provided with an external air inlet and an external air outlet, an evaporator and a controller arranged in the casing, and also comprising the air-cooled dehumidification device as described above.

[0013] Furthermore, it also includes a first fan and a second fan arranged in the casing, the suction side of the first fan is arranged toward the evaporator, the exhaust side of the first fan is arranged toward the outgoing air outlet, the second fan and the controller are arranged on the side of the partition plate facing away from the second fan, and the second fan is located on the side of the controller close to the outgoing air outlet.

[0014] The present invention also provides an air cooling and dehumidification control method, which is applied to the air conditioning unit as described above, and is characterized by comprising:

[0015] Controlling the air conditioning unit to enter a normal operation mode, and turning on the first fan and the second fan;

[0016] When air enters the air duct body in the air-cooled dehumidification device, the desiccant in the dehumidification cavity is used to absorb moisture in the air;

[0017] Through the operation of the second fan, the air dried by the air-cooled dehumidification device flows through the front side of the controller and is then discharged.

[0018] Furthermore, it also includes:

[0019] Determining whether the air-cooled dehumidification device has reached a dehumidification limit condition;

[0020] If so, the air conditioning unit is controlled to enter a defrosting mode or a shutdown mode, so as to utilize the heat emitted by the copper tube on the evaporator to heat the desiccant so that the desiccant precipitates moisture.

[0021] Furthermore, the condition for judging whether the air-cooled dehumidification device has reached the dehumidification limit is:

[0022] According to the formula: A(n)*B(p)*t≥C*m*(M(T 停机或化霜 )-M(T 运行 )) Determine that the air-cooled dehumidification device reaches a dehumidification limit condition;

[0023] Where A(n) represents the air volume passing through the air-cooled dehumidification device, B(p) represents the moisture content in the air, t represents the time since the last shutdown or defrosting, C represents a coefficient, m represents the desiccant filling amount, M(T 停机或化霜 ) represents the saturated moisture content of the desiccant during shutdown or defrosting, M(T 运行 ) represents the saturated moisture content of the desiccant during normal operation.

[0024] Furthermore, it also includes:

[0025] When the air conditioning unit enters the defrost mode or the shutdown mode, the second fan is turned off.

[0026] Furthermore, it also includes:

[0027] detecting a temperature of the controller;

[0028] The frequency of the second fan is adjusted according to the temperature of the controller.

[0029] Compared with the prior art, the beneficial effects of the air-cooled dehumidification device, air-conditioning unit and air-cooled dehumidification control method provided by the present invention are: the present invention uses air dried by the air-cooled dehumidification device to flow through the front of the controller, thereby utilizing air to dissipate heat from the controller while preventing water vapor from condensing on the controller. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0031] Figure 1 It is a cross-sectional structural schematic diagram of the air-cooled dehumidification device of the present invention;

[0032] Figure 2 It is a structural schematic diagram of the air conditioning unit in the present invention;

[0033] Figure 3 Schematic diagram of air inlet and outlet of the air-cooled dehumidification device of the present invention;

[0034] Figure 4 It is a schematic diagram of the desiccant in the air-cooled dehumidification device of the present invention when water is precipitated;

[0035] Figure 5 A schematic diagram of air inlet and outlet of the air conditioning unit in the present invention;

[0036] Among them, the main marks of the drawings in the figure are:

[0037] 1. Casing; 2. Evaporator; 3. Controller; 4. First fan; 5. Second fan; 6. Air-cooled dehumidification device;

[0038] 60. Air duct body; 61. Internal air inlet; 62. Internal air outlet; 63. Dehumidification cavity;

[0039] 641, accommodating channel; 642, anti-wear material layer;

[0040] 65. Grid panels; 66. Venetian blinds. DETAILED DESCRIPTION

[0041] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0042] In commercial heat pump air conditioning systems, due to the high current, the heat generated by the controller is very large, and heat dissipation has become a problem that must be solved. There are usually two general heat dissipation methods: air cooling and refrigerant heat dissipation. Refrigerant heat dissipation has a better effect, but for air conditioning units with higher current, the heat dissipation is still insufficient. Air cooling generally allows air to blow over the back of the controller to prevent water vapor in the air from condensing on the front of the controller and damaging the controller. If air can be blown over the front of the controller while the refrigerant is dissipating heat and water vapor condensation is avoided, most controller heat dissipation problems can be solved.

[0043] Based on this, the air-cooled dehumidification device, air-conditioning unit and air-cooled dehumidification control method proposed in the present invention can achieve the goal of blowing air over the front of the controller while the system already has refrigerant heat dissipation, thereby assisting in heat dissipation and preventing water vapor from condensing on the controller.

[0044] Please also read Figure 1 , Figure 2 The air-cooling dehumidification device 6 proposed by the present invention is arranged in an air-conditioning unit, and the air-conditioning unit at least comprises a casing 1 with an external air inlet and an external air outlet, and an evaporator 2 and a controller 3 arranged in the casing 1. The air-cooling dehumidification device 6 at least comprises:

[0045] The air duct body 60 is installed on the outside of the evaporator 2. The air duct body 60 is provided with an inner air inlet 61 and an inner air outlet 62. The inner air inlet 61 is arranged toward the outer air inlet, and the inner air outlet 62 is arranged toward the front of the controller 3.

[0046] The dehumidification cavity 63 is disposed in the air duct body 60 , and the dehumidification cavity 63 is filled with a desiccant.

[0047] The advantage of such a design is that the air-cooled dehumidification device 6 in the present invention utilizes a desiccant to absorb moisture in the air, and then the air dried by the air-cooled dehumidification device 6 flows through the front of the controller 3, thereby utilizing air to dissipate heat from the controller 3 while preventing water vapor from condensing on the controller 3.

[0048] In a further preferred embodiment of the present invention, Figure 1 , Figure 4As shown, the dehumidification cavity 63 is provided with an accommodating channel 641 for the copper tube on the evaporator 2 to extend into, and the inner wall of the accommodating channel 641 is provided with an anti-wear material layer 642.

[0049] The advantage of such a design is that the present invention takes into account the different saturated moisture contents of the desiccant at different temperatures. For example, the saturated moisture content of the desiccant is large at low temperatures and can absorb more moisture; for example, the saturated moisture content of the desiccant is small at high temperatures and can absorb less moisture. The air-cooled dehumidification device 6 is installed on several of the copper tubes at the end of the evaporator 2, and the heat emitted by the copper tubes on the evaporator 2 is used to heat the desiccant so that the desiccant precipitates moisture, which effectively prevents the desiccant from absorbing full moisture and being unable to continue to function. At the same time, the anti-wear material layer 642 prevents friction between the desiccant and the copper tube, so that the wear resistance is better and the service life is extended.

[0050] It should be noted that in the air-cooled dehumidification device 6, in addition to the dehumidification cavity 63 having a receiving channel 641 for the copper tube on the evaporator 2 to extend into, the air duct body 60 may also have a receiving channel 641 for the copper tube on the evaporator 2 to extend into, but there is no desiccant around the latter receiving channel 641.

[0051] It should also be noted that when the air conditioner is in normal operation mode, defrosting mode or shutdown mode, the temperature of the copper tube on the evaporator 2 is different. Since the saturated moisture content of the desiccant is different at different temperatures, the temperature difference of the copper tube on the evaporator 2 when the air conditioner is in normal operation, shutdown, defrosting and other modes can be used to make the desiccant absorb and precipitate moisture periodically.

[0052] In a further preferred embodiment of the present invention, Figure 1 As shown, a mesh plate 65 is provided in the dehumidification chamber 63 for limiting the movement of the desiccant.

[0053] The advantage of this design is that the air-cooled dehumidification device 6 of the present invention utilizes the mesh plate 65 and the inner wall of the air duct body 60 to enclose a dehumidification cavity 63, restricting the movement of the desiccant in the dehumidification cavity 63 and preventing the desiccant from flowing out of the air duct body 60 along with the moisture.

[0054] It should be noted that the desiccant is silica gel desiccant or the like, and the desiccant is usually in granular form. The mesh size of the mesh plate 65 can satisfy the passage of air but can block the passage of granular desiccant.

[0055] In a further preferred embodiment of the present invention, Figure 1 , Figure 4 As shown, the inner air inlet 61 and the inner air outlet 62 are located on both sides of the air duct body 60 , and the height of the inner air inlet 61 is lower than the height of the inner air outlet 62 .

[0056] The advantage of such a design is that the present invention directly utilizes the inner air inlet 61 of the air-cooled dehumidification device 6 as a drain outlet, and at the same time, the inner air inlet 61 is arranged at a relatively low height, which can not only allow the moisture precipitated from the desiccant to be discharged smoothly, but also prevent the moisture from directly flowing into the air-conditioning unit.

[0057] Of course, in other optional embodiments, the dehumidification chamber 63 may be equipped with a water storage channel, and the water in the water storage channel may be pumped out by a water pump.

[0058] In a further preferred embodiment of the present invention, Figure 1 As shown, shutters 66 are installed at the inner air inlet 61 and the inner air outlet 62 .

[0059] In actual application, the direction of the blades of the shutter 66 can be adjusted manually or automatically.

[0060] The advantage of this design is that shutters 66 are installed at the inner air inlet 61 and the inner air outlet 62 of the air-cooled dehumidification device 6 of the present invention, and the air volume and wind direction can be changed by adjusting the direction of the blades of the shutters 66.

[0061] Please also read Figure 1 , Figure 2 The air conditioning unit proposed in the present invention at least comprises a casing 1 with an external air inlet and an external air outlet, and an evaporator 2, a compressor and a controller 3 arranged in the casing 1. The air conditioning unit also comprises an air-cooled dehumidification device 6, the specific structure of which has been described in detail above and will not be repeated here.

[0062] The advantage of such a design is that the present invention installs an air-cooled dehumidification device 6 in the air-conditioning unit, thereby utilizing air to dissipate heat from the controller 3 while preventing water vapor from condensing on the controller 3, thereby improving the heat dissipation performance of the air-conditioning unit.

[0063] In a further preferred embodiment of the present invention, Figure 2 , Figure 5 As shown, it also includes a first fan 4 and a second fan 5 arranged in the casing 1, the suction side of the first fan 4 is arranged toward the evaporator 2, the exhaust side of the first fan 4 is arranged toward the outgoing air outlet, the second fan 5 and the controller 3 are arranged on the side of the partition plate facing away from the second fan 5, and the second fan 5 is located on the side of the controller 3 close to the outgoing air outlet.

[0064] The advantage of such a design is that the present invention installs a first fan 4 and a second fan 5 in the air-conditioning unit. Most of the air flowing in from the external air inlet exchanges heat with the evaporator 2, and then flows from the external air outlet to the outside of the air-conditioning unit through the operation of the first fan 4; a small part of the air flowing in from the external air inlet enters the air-cooled dehumidification device 6, and through the operation of the second fan 5, is dried by the air-cooled dehumidification device 6 and then flows through the front of the controller 3, and finally flows from the external air outlet to the outside of the air-conditioning unit.

[0065] In actual application, a partition plate is installed in the casing 1 next to the second fan 5, which divides the internal space of the casing 1 into two sub-cavities. The evaporator 2 and the first fan 4 are mainly located in one of the sub-cavities, and the air-cooled dehumidification device 6, the second fan 5, the controller 3 and other components (such as the compressor, etc.) are mainly located in the other sub-cavity.

[0066] In a further preferred embodiment of the present invention, the air conditioning unit adopts a heat pump unit.

[0067] It should be noted that the heat pump system usually mainly includes a heat pump unit, a water storage tank, a fan coil unit, etc. For example, the heat pump unit can heat the water in the water storage tank, the water storage tank delivers hot water to the fan coil unit, and the fan coil unit delivers hot air to the room. The heat pump unit mainly includes a refrigerant circulation loop formed by an evaporator, a compressor, and a condenser through pipelines.

[0068] Based on the specific structure of the air conditioning unit described above, the air cooling and dehumidification control method proposed in the present invention comprises at least the following steps:

[0069] Control the air conditioning unit to enter a normal operation mode and start the first fan and the second fan;

[0070] When air enters the air duct body of the air-cooled dehumidification device, the desiccant in the dehumidification cavity absorbs moisture in the air;

[0071] Through the operation of the second fan, the air dried by the air-cooled dehumidification device flows through the front of the controller and is discharged.

[0072] The advantage of such a design is that the present invention can prevent water vapor from condensing on the controller while utilizing air to dissipate heat from the front of the controller when the air-conditioning unit is in a normal operating mode.

[0073] In a further preferred embodiment of the present invention, the air cooling dehumidification control method further comprises the following steps:

[0074] Determine whether the air-cooled dehumidification device has reached the dehumidification limit condition;

[0075] If so, the air conditioner unit is controlled to enter the defrost mode or the shutdown mode, so as to utilize the heat emitted from the copper tube on the evaporator to heat the desiccant so as to precipitate moisture from the desiccant.

[0076] The advantage of such a design is that the present invention utilizes the heat emitted by the copper tube on the evaporator to heat the desiccant based on the different saturated moisture contents of the desiccant at different temperatures so as to release moisture from the desiccant, thereby preventing the desiccant from absorbing moisture and being unable to continue to function.

[0077] It should be noted that the saturated moisture content of the desiccant is different at different temperatures. Specifically, the saturated moisture content of the desiccant is large at low temperatures and can absorb more moisture; the saturated moisture content of the desiccant is small at high temperatures and can absorb less moisture.

[0078] When the air conditioner is in normal operation mode, defrost mode or shutdown mode, the temperature of the copper tube on the evaporator is different. Specifically, when the air conditioner is in normal operation mode, the temperature of the copper tube on the evaporator is lower; when the air conditioner is in defrost mode or shutdown mode, the temperature of the copper tube on the evaporator is higher.

[0079] Then, when the air-conditioning unit is in normal operation mode, the desiccant in the air-cooled dehumidification device absorbs moisture; when the air-conditioning unit is in defrost mode or shutdown mode, the desiccant in the air-cooled dehumidification device releases moisture.

[0080] It is worth noting that when the air conditioning unit is in normal operation mode, the temperature of the copper tube on the evaporator is low, and the desiccant in the air-cooled dehumidification device absorbs moisture; however, if the water cannot be analyzed out, the desiccant in the air-cooled dehumidification device will sooner or later reach a saturated state, that is, it cannot continue to absorb moisture. Therefore, the present invention adopts a method of determining whether the accumulated water absorption of the desiccant reaches a limit value. When the accumulated water absorption of the desiccant reaches a limit value, the air conditioning unit will directly enter the defrosting mode if it is under low temperature conditions, and will enter the shutdown mode if it is under high temperature conditions.

[0081] In a further preferred embodiment of the present invention, the air-cooling dehumidification control method is characterized in that the condition for judging whether the air-cooling dehumidification device reaches the dehumidification limit is:

[0082] According to the formula: A(n)*B(p)*t≥C*m*(M(T 停机或化霜 )-M(T 运行 )) to determine that the air-cooled dehumidification device has reached the dehumidification limit condition;

[0083] Where A(n) represents the air volume passing through the air-cooled dehumidification device, B(p) represents the moisture content in the air, t represents the time since the last shutdown or defrosting, C represents a coefficient, m represents the desiccant filling amount, M(T 停机或化霜 ) represents the saturated moisture content of the desiccant during shutdown or defrosting, M(T 运行 ) represents the saturated moisture content of the desiccant during normal operation.

[0084] The advantage of such a design is that the present invention determines whether the water absorption of the desiccant reaches the limit value through a set formula with high accuracy.

[0085] Of course, in other optional embodiments, the dehumidification limit condition may also be determined using other formulas or other determination methods.

[0086] It should be understood that when a heat pump unit is used, the dehumidification limit condition is as follows:

[0087] A(n)*B(p)*t≥C*m*(M(T 停机或化霜 )-M(T 运行 ));

[0088] M 累计 =A(n)*B(p)*t,C*m*(M(T 停机或化霜 )-M(T 运行 ))=C*M 极限 .

[0089] Specifically, M 累计 Represents the accumulated water absorption of the desiccant, starting from the last shutdown or defrosting. When the accumulated water absorption reaches the limit, the machine will be shut down or defrosted. 极限 Represents the difference in saturated moisture content at two temperatures, i.e., M 极限 It represents the difference between the saturated moisture content of the desiccant during normal operation and shutdown or defrosting, reflecting the maximum amount of moisture that the desiccant is allowed to absorb in one cycle, that is, the maximum mass of water that can be released during defrosting or shutdown.

[0090] Due to M 累计 Must be less than M 极限 , in order to leave a margin, multiply it by a coefficient C. C is used to determine M 累计 With M 极限 The smaller the ratio of C, the easier it is to enter defrosting or shut down.

[0091] The test shows that the accumulated water absorption is related to the air flow, air humidity, and accumulated time. The air flow is related to the fan speed. Air humidity can affect the compressor suction pressure. Therefore, the fan speed and compressor suction pressure are used to determine the M 累计 Calculations are performed, where A(n) and B(p) represent related functions or parameter tables.

[0092] Calculate M 累计When A(n) represents the air volume passing through the air-cooled dehumidification device, n represents the speed of the second fan, and A(n) is found in the parameter table according to n. B(p) represents the moisture content in the air, and p represents the compressor suction pressure, which is obtained by the pressure sensor equipped in the heat pump unit. B(p) is found in the parameter table according to p and the current ambient temperature (ambient temperature) and water temperature. t represents the time since the last shutdown or defrosting.

[0093] Calculate M 极限 When m represents the desiccant filling amount. 停机或化霜 ) and M(T 运行 ) represents the saturated moisture content during shutdown or defrosting, and normal operation. It is queried based on the tube temperature T of the copper tube on the evaporator. 停机或化霜 Represents the pipe temperature during shutdown or defrosting, T 运行 Represents the pipe temperature during operation.

[0094] In a further preferred embodiment of the present invention, the air cooling dehumidification control method is characterized by further comprising:

[0095] When the air conditioner enters the defrost mode or the shutdown mode, the second fan is turned off.

[0096] The advantage of this design is that when the air-conditioning unit enters the defrost mode or the shutdown mode, the desiccant will precipitate moisture. By turning off the second fan, it is effectively prevented that the desiccant will not be sucked into the air-conditioning unit when precipitating moisture.

[0097] In a further preferred embodiment of the present invention, the air cooling dehumidification control method is characterized by further comprising:

[0098] Detect the temperature of the controller;

[0099] The frequency of the second fan is adjusted according to the temperature of the controller.

[0100] The advantage of such a design is that by adjusting the frequency of the second fan according to the temperature of the controller, the heat dissipation effect of the controller can be ensured while saving power consumption.

[0101] In actual application, a temperature sensor is installed on the controller to monitor the temperature on the front of the controller. When the temperature is too high or continues to rise, the frequency of the second fan is controlled to increase; conversely, when the temperature is low, the frequency of the second fan is controlled to decrease.

[0102] The air-cooled dehumidification device, air conditioning unit and air-cooled dehumidification control method proposed in the present invention use a desiccant to absorb moisture in the air through the air-cooled dehumidification device, and the air dried by the air-cooled dehumidification device flows through the front of the controller, thereby using air to dissipate heat from the controller while preventing water vapor from condensing on the controller. In addition, the desiccant has different saturated moisture contents at different temperatures, and the temperature of the copper tube on the evaporator is different when the air conditioning unit is in normal operation mode, defrosting mode or shutdown mode, so that the desiccant absorbs and precipitates moisture periodically, effectively avoiding the desiccant from being full of moisture and unable to continue to function.

[0103] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. An air-cooled dehumidifying device, arranged in an air conditioning unit, the air conditioning unit comprising a casing with an external air inlet and an external air outlet, and an evaporator and a controller arranged in the casing, characterized in that: The dehumidification device comprises: An air duct body is installed on the outside of the evaporator, and the air duct body has an inner air inlet and an inner air outlet, the inner air inlet is arranged toward the outer air inlet, and the inner air outlet is arranged toward the front of the controller; The dehumidification cavity is arranged in the air duct main body, and the dehumidification cavity is filled with a desiccant.

2. The air-cooled dehumidification device according to claim 1, characterized in that: The dehumidification cavity is provided with a receiving channel for the copper tube on the evaporator to extend into, and the inner wall of the receiving channel is provided with an anti-wear material layer.

3. The air-cooled dehumidification device according to claim 1, characterized in that: A grid plate for limiting the movement of the desiccant is provided in the dehumidification cavity.

4. The air-cooled dehumidification device according to claim 1, characterized in that: The inner air inlet and the inner air outlet are located on two sides of the air duct main body, and the height of the inner air inlet is lower than that of the inner air outlet.

5. The air-cooled dehumidification device according to claim 1, characterized in that: Shutters are installed at the inner air inlet and the inner air outlet.

6. An air conditioning unit, comprising a casing having an external air inlet and an external air outlet, and an evaporator and a controller arranged in the casing, characterized in that: It also includes an air-cooled dehumidification device as described in any one of claims 1-5.

7. The air conditioning unit according to claim 6, characterized in that: It also includes a first fan and a second fan arranged in the casing, the suction side of the first fan is arranged toward the evaporator, the exhaust side of the first fan is arranged toward the outgoing air outlet, the second fan and the controller are arranged on the side of the partition plate facing away from the second fan, and the second fan is located on the side of the controller close to the outgoing air outlet.

8. The air cooling dehumidification control method is applied to the air conditioning unit as claimed in claim 7, characterized in that: include: Controlling the air conditioning unit to enter a normal operation mode, and turning on the first fan and the second fan; When air enters the air duct body in the air-cooled dehumidification device, the desiccant in the dehumidification cavity is used to absorb moisture in the air; Through the operation of the second fan, the air dried by the air-cooled dehumidification device flows through the front side of the controller and is then discharged.

9. The air cooling dehumidification control method according to claim 8, characterized in that: Also includes: Determining whether the air-cooled dehumidification device has reached a dehumidification limit condition; If so, the air conditioning unit is controlled to enter a defrosting mode or a shutdown mode, so as to utilize the heat emitted by the copper tube on the evaporator to heat the desiccant so that the desiccant precipitates moisture.

10. The air cooling dehumidification control method according to claim 9, characterized in that: The condition for judging whether the air-cooled dehumidification device has reached the dehumidification limit is: According to the formula: A(n)*B(p)*t≥C*m*(M(T 停机或化霜 )-M(T 运行 )) Determine that the air-cooled dehumidification device reaches a dehumidification limit condition; Where A(n) represents the air volume passing through the air-cooled dehumidification device, B(p) represents the moisture content in the air, t represents the time since the last shutdown or defrosting, C represents a coefficient, m represents the desiccant filling amount, M(T 停机或化霜 ) represents the saturated moisture content of the desiccant during shutdown or defrosting, M(T 运行 ) represents the saturated moisture content of the desiccant during normal operation.

11. The air cooling dehumidification control method according to claim 9, characterized in that: Also includes: When the air conditioning unit enters the defrost mode or the shutdown mode, the second fan is turned off.

12. The air cooling dehumidification control method according to claim 8, characterized in that: Also includes: detecting a temperature of the controller; The frequency of the second fan is adjusted according to the temperature of the controller.

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