Liquid dehumidification unit, method and device for controlling liquid dehumidification unit

Abstract

The present invention discloses a solution dehumidification unit, a method and a device for controlling the solution dehumidification unit. The method comprises: a return air side heat recovery module, which is used to heat and humidify the hygroscopic solution in the solution dehumidification unit through the return air, and obtain a reflux solution by collecting the hygroscopic solution after the heating and humidification treatment; a fresh air side heat recovery module, which is connected to the return air side heat recovery module, and is used to heat and humidify the fresh air with the reflux solution; a solution spray module, which is connected to the fresh air side heat recovery module, and is used to reheat and humidify the fresh air with the spray solution. The present invention solves the technical problem in the prior art that the solution in the solution dehumidification unit is prone to crystallization or freezing due to too low concentration under low temperature operation conditions.

Description

Technical Field

[0001] The present invention relates to the field of liquid dehumidification units, and in particular to a liquid dehumidification unit, and a method and device for controlling the liquid dehumidification unit. Background Art

[0002] At present, in the severely cold areas in the north, the enthalpy value of fresh air in winter is very low, and the difference with the indoor exhaust enthalpy is large. The fresh air load is high and the heat recovery potential is huge. Solution dehumidification uses the humidity control characteristics of certain solutions to dehumidify (or humidify) the air. The temperature of the air treated with the solution is determined by the solution temperature, and the relative humidity is determined by the solution concentration. The use of solution heat recovery can achieve full heat recovery, with high heat recovery efficiency and no attenuation during long-term operation.

[0003] Although the above method can avoid condensation of solution, it greatly reduces the heat return and reduces the energy saving. In addition, when used in the cold northern regions, condensation and frost will still occur.

[0004] Since the equilibrium concentration of the solution will change with the change of fresh air and indoor return air parameters, the solution concentration will change greatly under certain extreme conditions and affect the normal operation of the heat recovery unit. Especially when the fresh air temperature is low, the equilibrium concentration of the solution is too low, the crystallization point (freezing point) will increase, and the solution will also have crystallization (risk of freezing).

[0005] To address the above-mentioned problems, no effective solution has been proposed yet. Summary of the invention

[0006] The embodiments of the present invention provide a solution dehumidification unit, a method and a device for controlling the solution dehumidification unit, so as to at least solve the technical problem in the prior art that the solution in the solution dehumidification unit is prone to crystallization or freezing due to too low concentration under low temperature operating conditions.

[0007] According to one aspect of an embodiment of the present invention, a solution dehumidification unit is provided, comprising: a return air side heat recovery module, used for heating and humidifying the hygroscopic solution in the solution dehumidification unit through the return air, and obtaining a reflux solution by collecting the hygroscopic solution after the heating and humidification treatment; a fresh air side heat recovery module, connected to the return air side heat recovery module, used for heating and humidifying the fresh air with the reflux solution; a solution spray module, connected to the fresh air side heat recovery module, used for reheating and humidifying the fresh air with the spray solution.

[0008] Furthermore, the solution dehumidification unit further includes: a heat exchanger connected to the solution spray module, for providing the spray solution with heat for reheating and humidifying the fresh air.

[0009] Furthermore, the solution dehumidification unit also includes: a first solution circulation pump, respectively connected to the fresh air side heat recovery module and the return air side heat recovery module, for pumping the moisture absorbing solution in the fresh air side heat recovery module to the top of the return air side heat recovery module; a second solution circulation pump, respectively connected to the solution spray module and the heat exchanger, for pumping the spray solution at the bottom of the solution spray module to the heat exchanger for heating treatment, and pumping the spray solution after heating treatment to the top of the solution spray module.

[0010] Furthermore, in the case where the fresh air side heat recovery module includes: a first fresh air side heat recovery module and a second fresh air side heat recovery module, the first fresh air side heat recovery module and the second fresh air side heat recovery module are connected; a first trough body is provided at the bottom of the first fresh air side heat recovery module, and the first trough body is connected to the first solution circulation pump for accommodating the hygroscopic solution; a second trough body is provided at the bottom of the second fresh air side heat recovery module for accommodating the hygroscopic solution; a third trough body is provided at the bottom of the solution spray module, and the third trough body is connected to the second solution circulation pump for accommodating the spray solution.

[0011] Furthermore, the solution dehumidification unit also includes: a first interstage flow pipeline, arranged between the first tank body and the second tank body, for maintaining the concentration difference between the hygroscopic solution in the first tank body and the hygroscopic solution in the second tank body within a first predetermined range; a second interstage flow pipeline, arranged between the first tank body and the third tank body, and between the second tank body and the third tank body, for maintaining the concentration difference between the hygroscopic solution and the spraying solution within a second predetermined range.

[0012] Furthermore, the return air side heat recovery module includes: a first filler portion, used to accommodate the first filler in the return air side heat recovery module, wherein the hygroscopic solution is sprayed from the top of the return air side heat recovery module to wet the first filler, the hygroscopic solution contacts the return air in the first filler, and after the hygroscopic solution is heated and humidified, the return air is discharged to the outdoors.

[0013] Furthermore, the fresh air side heat recovery module includes: a second filler portion, used to accommodate the second filler in the fresh air side heat recovery module, wherein the reflux solution is sprayed from the top of the fresh air side heat recovery module to wet the second filler, the reflux solution contacts the fresh air in the second filler, and after heating and humidifying the fresh air, the fresh air is transported to the solution spraying module.

[0014] According to another aspect of an embodiment of the present invention, a method for controlling a solution dehumidification unit is also provided, including: heating and humidifying the hygroscopic solution according to the return air through the return air side heat recovery module in the solution dehumidification unit, and obtaining a reflux solution by collecting the hygroscopic solution after the heating and humidification treatment; heating and humidifying the fresh air using the reflux solution through the fresh air side heat recovery module in the solution dehumidification unit; and reheating and humidifying the fresh air using the spray solution through the solution spray module in the solution dehumidification unit.

[0015] Furthermore, before the hygroscopic solution is heated and humidified according to the return air through the return air side heat recovery module in the solution dehumidification unit, the method also includes: pumping the hygroscopic solution from the fresh air side heat recovery module to the top of the return air side heat recovery module through the first solution circulation pump in the solution dehumidification unit; spraying the hygroscopic solution from the top of the return air side heat recovery module to wet the first filler in the return air side heat recovery module, wherein the hygroscopic solution contacts the return air in the first filler, and the hygroscopic solution is heated and humidified; after the hygroscopic solution is heated and humidified, the return air is discharged to the outdoors.

[0016] Furthermore, before using the reflux solution to heat and humidify the fresh air through the fresh air side heat recovery module in the solution dehumidification unit, the method also includes: spraying the reflux solution from the top of the fresh air side heat recovery module to wet the second filler in the fresh air side heat recovery module, wherein the reflux solution contacts the fresh air in the second filler to heat and humidify the fresh air; after heating and humidifying the fresh air, the fresh air is transported to the solution spraying module.

[0017] According to another aspect of an embodiment of the present invention, a device for controlling a solution dehumidification unit is also provided, including: a first processing module, used to heat and humidify the hygroscopic solution according to the return air through the return air side heat recovery module in the solution dehumidification unit, and obtain a reflux solution by collecting the above-mentioned hygroscopic solution after the heating and humidification treatment; a second processing module, used to heat and humidify the fresh air using the above-mentioned reflux solution through the fresh air side heat recovery module in the above-mentioned solution dehumidification unit; a third processing module, used to reheat and humidify the above-mentioned fresh air using the spray solution through the solution spray module in the above-mentioned solution dehumidification unit.

[0018] According to another aspect of an embodiment of the present invention, a storage medium is further provided, wherein the storage medium includes a stored program, wherein when the program is running, the device where the storage medium is located is controlled to execute any one of the above-mentioned methods for controlling a solution dehumidification unit.

[0019] According to another aspect of an embodiment of the present invention, a processor is further provided, and the processor is used to run a program, wherein when the program is run, any one of the above-mentioned methods for controlling a solution dehumidification unit is executed.

[0020] In an embodiment of the present invention, the return air side heat recovery module in the solution dehumidification unit heats and humidifies the hygroscopic solution according to the return air, and the reflux solution is obtained by collecting the hygroscopic solution after the heating and humidification treatment; the fresh air side heat recovery module in the solution dehumidification unit uses the reflux solution to heat and humidify the fresh air; the solution spray module in the solution dehumidification unit uses the spray solution to reheat and humidify the fresh air, thereby achieving the purpose of allowing the return air to transfer energy to the fresh air in the solution dehumidification unit.

[0021] Since the spray solution in contact with the fresh air is further heated by the solution spray module to take away excess moisture in the solution, the concentration of the spray solution after the fresh air is heated and humidified is increased. Through the circulation at the bottom of the tank, the risk of crystallization or freezing of solutions at all levels due to too low concentration is eliminated, thereby solving the technical problem in the prior art that the solution in the solution dehumidification unit is prone to crystallization or freezing due to too low concentration under low-temperature operating conditions, thereby achieving the effect of eliminating the phenomenon of crystallization or freezing of the solution in the solution dehumidification unit. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of this application. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0023] Figure 1 is a schematic structural diagram of an optional solution dehumidification unit according to an embodiment of the present invention;

[0024] Figure 2 is a flow chart of a method for controlling a solution dehumidification unit according to an embodiment of the present invention;

[0025] Figure 3 It is a structural schematic diagram of a device for controlling a solution dehumidification unit according to an embodiment of the present invention.

[0026] 1. Primary heat recovery module on the fresh air side; 2. Secondary heat recovery module on the fresh air side; 3. Primary heat recovery module on the return air side; 4. Secondary heat recovery module on the return air side; 5. Solution spray module; 6 or 7. First solution circulation pump; 8. Second solution circulation pump; 9. Heat exchanger; 10. First interstage flow pipeline; 11 or 12. Second interstage flow pipeline; 40. First processing module; 42. Second processing module; 44. Third processing module. DETAILED DESCRIPTION

[0027] In order to enable those skilled in the art to better understand the scheme of the present invention, the technical scheme in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0028] It should be noted that the terms "first", "second", etc. in the specification and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the present invention described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units that are clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0029] The common liquid dehumidification air conditioning unit is a cross-flow liquid dehumidification unit. The air flows in the horizontal direction, the solution flows in the direction of gravity, and the heat and mass transfer between the solution and the air is cross-flow. The heat recovery section is connected to the dehumidification section and the regeneration section. For the heat recovery section in winter conditions, the hygroscopic solution is used as a medium to contact the return air and the fresh air through spraying to transfer heat and mass, and transfer the energy of the indoor return air to the fresh air. Finally, the return air is cooled and dehumidified, and the fresh air is heated and humidified.

[0030] The present application proposes to add a group of solution spray modules on the air supply side on the basis of the conventional cross-flow heat recovery form, and the spray solution is heated by an external heat source device to further heat and humidify the air after heat recovery, and an interstage flow is set between the solution on this side and the heat recovery solution to maintain the concentration of the heat recovery solution, wherein the solution concentration is controlled by the heating amount, thereby eliminating the risk of crystallization or freezing of the solution due to too low concentration.

[0031] Example 1

[0032] According to an embodiment of the present invention, an embodiment of a solution dehumidification unit is provided, wherein the solution dehumidification unit comprises: a return air side heat recovery module, a fresh air side heat recovery module, and a solution spray module, wherein:

[0033] The return air side heat recovery module is used to heat and humidify the hygroscopic solution in the solution dehumidification unit through the return air, and obtain the reflux solution by collecting the hygroscopic solution after the heating and humidification treatment; the fresh air side heat recovery module is connected to the return air side heat recovery module, and is used to heat and humidify the fresh air with the reflux solution; the solution spray module is connected to the fresh air side heat recovery module, and is used to reheat and humidify the fresh air with the spray solution.

[0034] In the embodiment of the present application, the above-mentioned solution dehumidification unit uses solution dehumidification to achieve heat recovery, wherein the above-mentioned hygroscopic solution can utilize the humidity regulating characteristics of certain solutions to dehumidify the air, and the embodiment of the present application can also utilize the solution to humidify the air. The temperature of the air treated with the solution can be determined by the temperature of the solution, and the relative humidity of the air treated with the solution can be determined by the concentration of the solution. Using solution dehumidification for heat recovery can achieve full heat recovery, with high heat recovery efficiency and no attenuation during long-term operation.

[0035] In this embodiment, a liquid dehumidification unit is selected, which can be applied to various devices, including but not limited to: air conditioners, fresh air blowers, etc. It should be noted that the fresh air will form supply air after passing through the fresh air side heat recovery module; and the return air will form exhaust air after being sprayed by the return air side heat recovery module.

[0036] Optionally, the solution dehumidification unit may be a solution dehumidification air conditioning unit, and the return air may be indoor return air, for example, the air in the local environment is purified and then sent back to the local environment, and may be air that is reused indoors.

[0037] Optionally, the fresh air side heat recovery module is the heat recovery module on the fresh air side of the solution dehumidification unit, which is arranged in the lower layer of the solution dehumidification unit. The hygroscopic solution can be but is not limited to being understood as the heat recovery circulating solution in the trough body below the fresh air side heat recovery module. The return air side heat recovery module is the heat recovery module on the return air side of the solution dehumidification unit, which is arranged in the upper layer of the solution dehumidification unit and is used to heat and humidify the hygroscopic solution in the solution dehumidification unit through return air to obtain a reflux solution, wherein the reflux solution can be but is not limited to being the solution in the trough body below the return air side heat recovery module; in this embodiment of the present application, a reflux solution can be obtained by exchanging heat and mass between the return air and the hygroscopic solution, and the reflux solution is in contact with the fresh air side of the solution dehumidification unit.

[0038] In the above optional embodiment, the hygroscopic solution at the bottom of the tank of the solution dehumidification air-conditioning unit is transported to the return air side heat recovery module for spraying through the solution circulation pump of the solution dehumidification unit. The return air side heat recovery module heats and humidifies the sprayed hygroscopic solution through return air to obtain a reflux solution.

[0039] Furthermore, by adding a group of solution spray modules on the fresh air side, wherein the spray solution in the solution spray module is heated by an external heat source device (e.g., a heat exchanger), the air after heat recovery is further heated and humidified, and an interstage flow is set between the solution on this side and the heat recovery solution to maintain the concentration of the heat recovery solution, wherein the solution concentration is controlled by the heating amount, thereby eliminating the risk of crystallization or freezing of the solution due to too low concentration.

[0040] Based on the above-mentioned embodiments of the present application, the purpose of transferring energy from the return air to the fresh air in the solution dehumidification unit is achieved, that is, the transfer of energy from the indoor return air to the fresh air is achieved, and finally the return air is cooled and dehumidified, the fresh air is heated and humidified, and the moisture content and enthalpy of the supply air are further increased, taking away excess water in the solution, thereby eliminating the risk of crystallization or freezing of the solution due to too low concentration.

[0041] In the embodiment of the present application, the heat recovery of the solution dehumidification unit includes a heat recovery section, a dehumidification section and a regeneration section. The embodiment of the present application can be used for the heat recovery stage under winter conditions. The target solution is used as a medium to contact the return air and the fresh air respectively through a spraying method to transfer heat and mass transfer, thereby transferring the energy of the return air to the fresh air, so that the return air is cooled and dehumidified, and the fresh air is heated and humidified. The solution in contact with the fresh air side is further heated by a heat exchanger, thereby increasing the enthalpy value and moisture content of the supply air, taking away excess water in the solution, thereby eliminating the risk of crystallization or freezing of the solution due to too low concentration, thereby improving the operation stability and reliability of the unit.

[0042] In order to improve the performance of the solution dehumidification unit, each functional section of the heat recovery of the solution dehumidification unit can be set to one-stage or multi-stage heat recovery according to the needs. Optionally, in the embodiment of the present application, the solution dehumidification unit provided in the embodiment of the present application can be described by a solution dehumidification unit with two-stage heat recovery, but is not limited to it.

[0043] In winter conditions, indoor return air is used to preheat and humidify fresh air. The solution at the bottom of the tank is transported to the upper return air side heat recovery module of the liquid dehumidification unit through the corresponding solution circulation pump to be heated and humidified by the return air. The diluted and heated solution flows back to the corresponding fresh air side heat recovery module on the lower layer of the solution dehumidification unit to preheat and humidify the fresh air, thus realizing the transfer of energy from indoor return air to fresh air. Taking the above-mentioned solution dehumidification unit as a two-stage heat recovery solution dehumidification unit as an example, after the fresh air undergoes two-stage heat recovery, it passes through the first-stage solution spray module again, and the air is further heated and humidified to increase the enthalpy value and moisture content.

[0044] Still taking the above-mentioned solution dehumidification unit as a solution dehumidification unit with secondary heat recovery as an example, in an optional embodiment, the return air side heat recovery module may include a return air side primary heat recovery module and a return air side secondary heat recovery module, which are respectively used to heat and humidify the hygroscopic solution at the bottom of the tank of the solution dehumidification unit through return air to obtain a reflux solution. The hygroscopic solution at the bottom of the tank can be transported to the return air side primary heat recovery module and the return air side secondary heat recovery module for spraying through a solution circulation pump, and the sprayed hygroscopic solution is heated and humidified by the return air, and the sprayed hygroscopic solution exchanges heat and mass with the return air, and is heated and diluted by the return air to obtain a reflux solution.

[0045] Through the above optional embodiments, the solution is heated and diluted by exchanging heat and mass with the return air in the first-level heat recovery module on the return air side and the second-level heat recovery module on the return air side. The temperature of the solution in the first-level heat recovery module on the return air side is higher than the temperature of the solution in the second-level heat recovery module on the return air side, and the temperature is generally higher than the target temperature, for example, close to the temperature of the return air, generally higher than 0°C, to avoid icing of the heat exchanger.

[0046] In an embodiment of the present invention, the return air side heat recovery module in the solution dehumidification unit heats and humidifies the hygroscopic solution according to the return air, and the reflux solution is obtained by collecting the hygroscopic solution after the heating and humidification treatment; the fresh air side heat recovery module in the solution dehumidification unit uses the reflux solution to heat and humidify the fresh air; the solution spray module in the solution dehumidification unit uses the spray solution to reheat and humidify the fresh air, thereby achieving the purpose of allowing the return air to transfer energy to the fresh air in the solution dehumidification unit.

[0047] Since the solution in contact with the fresh air is further heated by the solution spray module to take away excess moisture in the solution, the concentration of the spray solution after the fresh air is heated and humidified is increased. Through the circulation at the bottom of the tank, the risk of crystallization or freezing of solutions at all levels due to too low concentration is eliminated, thereby solving the technical problem in the prior art that the solution in the solution dehumidification unit is prone to crystallization or freezing due to too low concentration under low-temperature operating conditions, thereby achieving the effect of eliminating the phenomenon of crystallization or freezing of the solution in the solution dehumidification unit.

[0048] In order to improve the performance of the liquid dehumidification unit, each functional section can be set to one or more stages according to the needs. The following takes the liquid dehumidification air conditioning unit with two-stage heat recovery as an example, and illustrates the technical solution of the present invention in combination with the preferred implementation mode:

[0049] Figure 1 is a schematic diagram of an optional solution dehumidification air conditioning unit according to an embodiment of the present invention, such as Figure 1As shown, the solution dehumidification air-conditioning unit includes: a primary heat recovery module 1 on the fresh air side, a secondary heat recovery module 2 on the fresh air side, a primary heat recovery module 3 on the return air side, a secondary heat recovery module 4 on the return air side, a solution spray module 5, a first solution circulation pump 6 or 7, a second solution circulation pump 8, a heat exchanger 9, a first interstage flow pipeline 10, and a second interstage flow pipeline 11 or 12.

[0050] Optionally, the fresh air side heat recovery module includes a fresh air inlet, and the return air side heat recovery module includes a return air inlet. Figure 1 As shown, the position indicated by the fresh air arrow on the fresh air side heat recovery module may be a fresh air inlet, which may receive fresh air entering from the outside.

[0051] The solution dehumidification unit of the embodiment of the present application arranges the primary heat recovery module 1 on the fresh air side and the secondary heat recovery module 2 on the fresh air side on the lower layer of the solution dehumidification air-conditioning unit; arranges the primary heat recovery module 3 on the return air side and the secondary heat recovery module 4 on the return air side on the upper layer of the solution dehumidification air-conditioning unit; the solution spray module 5 is connected to the secondary heat recovery module 2 on the fresh air side, and the first solution circulation pump 6 is respectively connected to the primary heat recovery module 1 on the fresh air side and the secondary heat recovery module 4 on the return air side; the first solution circulation pump 7 is respectively connected to the secondary heat recovery module 2 on the fresh air side and the primary heat recovery module 3 on the return air side; the second solution circulation pump 8 is respectively connected to the solution spray module 5 and the heat exchanger 9; the heat exchanger 9 is arranged at the solution spray module 5 as an external heat source for providing heat to the solution spray module 5.

[0052] In addition, in order to avoid excessive difference in solution concentration between each level of the tank body, a first interstage flow pipeline 10 is set between the lower tank body of the first-level heat recovery module 1 on the fresh air side and the second-level heat recovery module 2 on the fresh air side, and a second interstage flow pipeline 12 is set between the fresh air side heat recovery module 1 and the solution spray module 5, wherein the above-mentioned second interstage flow pipeline 12 is connected to the outlet side of the second solution circulation pump 8 to promote the circulation of solution between the lower tank bodies; a second interstage flow pipeline 11 is set between the fresh air side heat recovery module 2 and the solution spray module 5 to maintain the concentration difference between the spray solution and the heat recovery solution within a certain range.

[0053] In the embodiment of the present application, the return air passes through the return air side primary heat recovery module 3 and the return air side secondary heat recovery module 4 on the upper layer in sequence, and the fresh air passes through the fresh air side primary heat recovery module 1 and the fresh air side secondary heat recovery module 2 on the lower layer in sequence.

[0054] The first solution circulation pump 6 transports the solution in the lower tank body to the secondary heat recovery module 4 on the return air side for spraying, and the first solution circulation pump 7 transports (pumps) the solution in the lower tank body to the primary heat recovery module 3 on the return air side for spraying. The sprayed solution exchanges heat and mass with the return air in the primary heat recovery module 3 on the return air side and the secondary heat recovery module 4 on the return air side in turn, and is heated and diluted, that is, heated and humidified by the return air, wherein the temperature of the solution in the primary heat recovery module 3 on the return air side is higher than the temperature of the solution in the secondary heat recovery module 4 on the return air side, and the temperature of the solution in the primary heat recovery module 3 on the return air side is higher than 0°C.

[0055] Then, the second solution circulation pump 8 pumps (transports) the spray solution at the bottom of the solution spray module to the heat exchanger for heating treatment, and pumps the heated spray solution to the solution spray module 5, and the solution spray module 5 in contact with the fresh air side further heats and humidifies the fresh air. After the fresh air undergoes two-stage heat recovery, it passes through the primary solution spray module again, and the air is further heated and humidified to increase the enthalpy and moisture content of the supply air, and take away excess water in the solution, thereby eliminating the risk of crystallization or freezing of the solution due to too low concentration.

[0056] Optionally, the embodiment of the present application further provides a first inter-stage flow pipeline 10 and a second inter-stage flow pipeline 11 or 12 in the lower tank body of the solution dehumidification air-conditioning unit, so that there is solution circulation between the first tank body of the first-level heat recovery module 1 on the fresh air side and the second tank body of the second-level heat recovery module 2 on the fresh air side, between the first tank body of the first-level heat recovery module 1 on the fresh air side and the third tank body of the solution spray module 5, and between the second tank body of the second-level heat recovery module 2 on the fresh air side and the third tank body of the solution spray module 5, so as to maintain the solution concentration difference of each stage within a certain range, and the concentration will not be too concentrated or too dilute, thereby avoiding excessive concentration difference of the solution in each tank body.

[0057] The embodiment of the present application can be applied to the heat recovery function section of the solution dehumidification unit in extremely cold areas. Since the water absorption of the solution is small in winter, the interstage flow rate is very small, and the mixing heat loss caused is also relatively small. In addition, after the fresh air undergoes two-stage heat recovery, it passes through the first-stage solution spray module again, and the air is further heated and humidified. By controlling the heat of the heated solution, the relative humidity of the supply air can be controlled, the enthalpy of the supply air can be increased, and the excess water in the solution can be taken away, ultimately achieving the purpose of controlling the solution concentration, thereby eliminating the risk of solution crystallization or freezing caused by too low a solution concentration.

[0058] The embodiment of the present application further heats the fresh air by setting a solution spray module in the solution dehumidification air conditioning unit on the basis of conventional heat recovery, thereby increasing the enthalpy and moisture content of the air supply. The structure is simple, and the solution concentration can be controlled by controlling the heating amount of the heat exchanger, removing excess water in the solution, eliminating the risk of solution crystallization or freezing, and thus improving the operation stability and reliability of the unit.

[0059] In an optional embodiment, the solution dehumidification unit further includes: a heat exchanger connected to the solution spray module, for providing heat for the spray solution to reheat and humidify the fresh air.

[0060] Optionally, the heat exchanger mentioned above can be a hot water heat exchanger with higher heating efficiency.

[0061] As an optional embodiment, the solution dehumidification unit also includes: a first solution circulation pump, respectively connected to the fresh air side heat recovery module and the return air side heat recovery module, for pumping the moisture absorbing solution in the fresh air side heat recovery module to the top of the return air side heat recovery module; a second solution circulation pump, respectively connected to the solution spray module and the heat exchanger, for pumping the spray solution at the bottom of the solution spray module to the heat exchanger for heating treatment, and pumping the spray solution after heating treatment to the top of the solution spray module.

[0062] Among them, Figure 1 As shown, taking the above-mentioned solution dehumidification unit with two-stage heat recovery as an example, the number of the above-mentioned first solution circulation pumps can be two, namely the first solution circulation pump 6 and the first solution circulation pump 7. The first solution circulation pump 6 is respectively connected to the primary heat recovery module 1 on the fresh air side and the secondary heat recovery module 4 on the return air side, and is used to pump the above-mentioned hygroscopic solution in the primary heat recovery module 1 on the fresh air side to the top of the secondary heat recovery module 4 on the return air side; the first solution circulation pump 7 is respectively connected to the secondary heat recovery module 2 on the fresh air side and the primary heat recovery module 3 on the return air side, and is used to pump the above-mentioned hygroscopic solution in the secondary heat recovery module 2 on the fresh air side to the top of the primary heat recovery module 3 on the return air side.

[0063] In an optional embodiment, when the fresh air side heat recovery module includes: a first fresh air side heat recovery module and a second fresh air side heat recovery module, the first fresh air side heat recovery module and the second fresh air side heat recovery module are connected; a first trough body is provided at the bottom of the first fresh air side heat recovery module, and the first trough body is connected to the first solution circulation pump for accommodating the hygroscopic solution; a second trough body is provided at the bottom of the second fresh air side heat recovery module for accommodating the hygroscopic solution; a third trough body is provided at the bottom of the solution spray module, and the third trough body is connected to the second solution circulation pump for accommodating the spray solution.

[0064] In order to improve the performance of the liquid dehumidification unit, each functional section can be set to one level or multiple levels according to the needs. In the case where the above-mentioned fresh air side heat recovery module includes: a first fresh air side heat recovery module and a second fresh air side heat recovery module, that is, in the case where the above-mentioned liquid dehumidification unit has two-stage heat recovery, such as Figure 1 As shown, the first fresh air side heat recovery module can be a fresh air side primary heat recovery module 1, and the second fresh air side heat recovery module can be a fresh air side secondary heat recovery module 2.

[0065] Still Figure 1 As shown, the trough body arranged at the bottom of the fresh air side primary heat recovery module 1 (first fresh air side heat recovery module) is the first trough body, and the above-mentioned first trough body is connected to the above-mentioned first solution circulation pump 6, and the trough body arranged at the bottom of the fresh air side secondary heat recovery module 2 (second fresh air side heat recovery module) is the second trough body, and the above-mentioned second trough body is connected to the above-mentioned first solution circulation pump 7.

[0066] In an optional embodiment, it also includes: a first interstage flow pipeline, arranged between the above-mentioned first tank body and the above-mentioned second tank body, for maintaining the concentration difference between the hygroscopic solution in the above-mentioned first tank body and the hygroscopic solution in the above-mentioned second tank body within a first predetermined range; a second interstage flow pipeline, arranged between the above-mentioned first tank body and the above-mentioned third tank body, and between the above-mentioned second tank body and the above-mentioned third tank body, for maintaining the concentration difference between the above-mentioned hygroscopic solution and the above-mentioned spray solution within a second predetermined range.

[0067] It should be noted that in the embodiment of the present application, the above-mentioned first predetermined range and second predetermined range are not specifically limited. The first predetermined range and the second predetermined range may be the same or different, which can ensure that the solution concentration between the tank bodies is not too concentrated or too dilute, thereby avoiding excessive difference in solution concentration between the tank bodies at each level, which can be achieved in the embodiment of the present application.

[0068] In the embodiment of the present application, an interstage flow is provided in the lower tank body of the solution dehumidification unit, so that the solution circulates between the first tank body, the second tank body and the third tank body, and the solution circulation between the tank bodies is controlled so as to maintain the concentration difference of each stage within a certain range, avoid excessive concentration difference between the solutions of the tank bodies at each stage, and prevent the concentration from being too high or too low. In addition, since the water absorption of the solution is small in winter, the interstage flow rate is very small, and the mixing heat loss caused is also relatively small. In this heat recovery method, by controlling the heat of the heated solution, the relative humidity of the supply air can be controlled, and finally the concentration of the solution can be controlled to avoid crystallization or freezing caused by too low concentration of the solution.

[0069] In an optional embodiment, the return air side heat recovery module includes: a first filler portion, used to accommodate the first filler in the return air side heat recovery module, wherein the hygroscopic solution is sprayed from the top of the return air side heat recovery module to wet the first filler, the hygroscopic solution contacts the return air in the first filler, and after the hygroscopic solution is heated and humidified, the return air is discharged to the outdoors.

[0070] In another optional embodiment, the fresh air side heat recovery module includes: a second filler portion, used to accommodate the second filler in the fresh air side heat recovery module, wherein the reflux solution is sprayed from the top of the fresh air side heat recovery module to wet the second filler, the reflux solution contacts the fresh air in the second filler, and after heating and humidifying the fresh air, the fresh air is transported to the solution spraying module.

[0071] like Figure 1 As shown, the middle mesh position of the heat recovery module on the fresh air side is the second filler portion, and the middle mesh position of the heat recovery module on the return air side is the first filler portion.

[0072] It should be noted that in this application Figure 1 The specific structure of the liquid dehumidification unit shown in the figure is only for reference. In specific applications, the liquid dehumidification unit in this application can be compared to Figure 1 The solution dehumidification units shown have more or less structures.

[0073] Example 2

[0074] According to an embodiment of the present invention, an embodiment of a method for controlling a solution dehumidification unit is provided. It should be noted that the steps shown in the flowchart of 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 can be executed in an order different from that shown here.

[0075] Figure 2 is a flow chart of a method for controlling a solution dehumidification unit according to an embodiment of the present invention. Figure 2 As shown, the method comprises the following steps:

[0076] Step S102, heating and humidifying the hygroscopic solution according to the return air by the return air side heat recovery module in the solution dehumidification unit, and obtaining a reflux solution by collecting the hygroscopic solution after the heating and humidification treatment;

[0077] Step S104, using the reflux solution to heat and humidify the fresh air through the fresh air side heat recovery module in the solution dehumidification unit;

[0078] Step S106, using a solution spraying module in the solution dehumidification unit to reheat and humidify the fresh air using a spraying solution.

[0079] In an optional embodiment, before the return air side heat recovery module in the solution dehumidification unit heats and humidifies the hygroscopic solution according to the return air, the method further includes:

[0080] Step S202: Pump the moisture absorbing solution from the fresh air side heat recovery module to the top of the return air side heat recovery module through the first solution circulation pump in the solution dehumidification unit.

[0081] Optionally, the fresh air side heat recovery module is provided with a first tank body for accommodating a hygroscopic solution, and the hygroscopic solution can be pumped from the first tank body of the fresh air side heat recovery module to the top of the return air side heat recovery module.

[0082] Step S204, spraying the hygroscopic solution from the top of the return air side heat recovery module to wet the first filler in the return air side heat recovery module, wherein the hygroscopic solution contacts the return air in the first filler to perform heating and humidification treatment on the hygroscopic solution;

[0083] Step S206, after heating and humidifying the moisture absorbing solution, the return air is discharged to the outside.

[0084] As an optional embodiment, before the fresh air is heated and humidified by the reflux solution through the fresh air side heat recovery module in the solution dehumidification unit, the method further includes:

[0085] Step S302, spraying the reflux solution from the top of the fresh air side heat recovery module to wet the second filler in the fresh air side heat recovery module, wherein the reflux solution contacts the fresh air in the second filler to perform heating and humidification treatment on the fresh air;

[0086] Step S304: after heating and humidifying the fresh air, the fresh air is transported to the solution spraying module.

[0087] It should be noted that any optional or preferred method for controlling a solution dehumidification unit in the above-mentioned embodiment 1 can be executed or realized in the solution dehumidification unit provided in this embodiment.

[0088] In addition, it is still necessary to explain that the optional or preferred implementation of this embodiment can refer to the relevant description in Example 1, which will not be repeated here.

[0089] Example 3

[0090] According to an embodiment of the present invention, there is also provided an embodiment of a device for implementing the above method for controlling a solution dehumidification unit. Figure 3 is a schematic diagram of the structure of a device for controlling a solution dehumidification unit according to an embodiment of the present invention. Figure 3 As shown, the device for controlling the liquid dehumidification unit includes: a first processing module 40, a second processing module 42 and a third processing module 44, wherein:

[0091] The first processing module 40 is used to heat and humidify the hygroscopic solution according to the return air through the return air side heat recovery module in the solution dehumidification unit, and obtain the reflux solution by collecting the above-mentioned hygroscopic solution after the heating and humidification treatment; the second processing module 42 is used to heat and humidify the fresh air using the above-mentioned reflux solution through the fresh air side heat recovery module in the above-mentioned solution dehumidification unit; the third processing module 44 is used to reheat and humidify the above-mentioned fresh air using the spray solution through the solution spray module in the above-mentioned solution dehumidification unit.

[0092] It should be noted that the above modules can be implemented by software or hardware. For example, for the latter, it can be implemented in the following ways: the above modules can be located in the same processor; or the above modules can be located in different processors in any combination.

[0093] It should be noted that the first processing module 40, the second processing module 42 and the third processing module 44 correspond to steps S102 to S106 in Example 1, and the examples and application scenarios implemented by the modules and the corresponding steps are the same, but are not limited to the contents disclosed in the above-mentioned Example 1. It should be noted that the modules as part of the device can be run in a computer terminal.

[0094] It should be noted that the optional or preferred implementation of this embodiment can refer to the relevant description in Example 1, which will not be repeated here.

[0095] The above-mentioned device for controlling the solution dehumidification unit may also include a processor and a memory. The above-mentioned first processing module 40, second processing module 42 and third processing module 44 are all stored in the memory as program units, and the processor executes the above-mentioned program units stored in the memory to realize corresponding functions.

[0096] The processor includes a kernel, which retrieves the corresponding program unit from the memory. The kernel may be one or more. The memory may include non-permanent memory in a computer-readable medium, random access memory (RAM) and / or non-volatile memory, such as read-only memory (ROM) or flash RAM. The memory includes at least one memory chip.

[0097] According to an embodiment of the present application, a storage medium embodiment is also provided. Optionally, in this embodiment, the storage medium includes a stored program, wherein when the program is executed, the device where the storage medium is located is controlled to execute any of the above methods for controlling a liquid dehumidification unit.

[0098] Optionally, in this embodiment, the storage medium may be located in any computer terminal in a computer terminal group in a computer network, or in any mobile terminal in a mobile terminal group, and the storage medium includes a stored program.

[0099] Optionally, when the program is running, the device where the storage medium is located is controlled to perform the following functions: heating and humidifying the hygroscopic solution according to the return air through the return air side heat recovery module in the solution dehumidification unit, and obtaining the reflux solution by collecting the above-mentioned hygroscopic solution after the heating and humidification treatment; heating and humidifying the fresh air using the above-mentioned reflux solution through the fresh air side heat recovery module in the above-mentioned solution dehumidification unit; reheating and humidifying the above-mentioned fresh air using the solution spraying module in the above-mentioned solution dehumidification unit.

[0100] Optionally, when the program is running, the device where the storage medium is located is controlled to perform the following functions: the hygroscopic solution is pumped from the fresh air side heat recovery module to the top of the return air side heat recovery module through the first solution circulation pump in the solution dehumidification unit; the hygroscopic solution is sprayed from the top of the return air side heat recovery module to wet the first filler in the return air side heat recovery module, wherein the hygroscopic solution contacts the return air in the first filler, and the hygroscopic solution is heated and humidified; after the hygroscopic solution is heated and humidified, the return air is discharged to the outdoors.

[0101] Optionally, when the program is running, the device where the storage medium is located is controlled to perform the following functions: spray the reflux solution from the top of the fresh air side heat recovery module to wet the second filler in the fresh air side heat recovery module, wherein the reflux solution contacts the fresh air in the second filler to heat and humidify the fresh air; after heating and humidifying the fresh air, the fresh air is transported to the solution spraying module.

[0102] According to an embodiment of the present application, a processor embodiment is also provided. Optionally, in this embodiment, the processor is used to run a program, wherein when the program is run, any one of the methods for controlling a liquid dehumidification unit is executed.

[0103] An embodiment of the present application provides a device, which includes a processor, a memory, and a program stored in the memory and executable on the processor. When the processor executes the program, the following steps are implemented: a return air side heat recovery module in a solution dehumidification unit heats and humidifies the hygroscopic solution according to the return air, and a reflux solution is obtained by collecting the hygroscopic solution after the heating and humidification treatment; a fresh air side heat recovery module in the solution dehumidification unit uses the reflux solution to heat and humidify the fresh air; a solution spray module in the solution dehumidification unit uses a spray solution to reheat and humidify the fresh air.

[0104] Optionally, when the processor executes the program, the hygroscopic solution can also be pumped from the fresh air side heat recovery module to the top of the return air side heat recovery module through the first solution circulation pump in the solution dehumidification unit; the hygroscopic solution is sprayed from the top of the return air side heat recovery module to wet the first filler in the return air side heat recovery module, wherein the hygroscopic solution contacts the return air in the first filler, and the hygroscopic solution is heated and humidified; after the hygroscopic solution is heated and humidified, the return air is discharged to the outdoors.

[0105] Optionally, when the processor executes the program, the reflux solution can also be sprayed from the top of the fresh air side heat recovery module to wet the second filler in the fresh air side heat recovery module, wherein the reflux solution contacts the fresh air in the second filler to heat and humidify the fresh air; after the fresh air is heated and humidified, the fresh air is transported to the solution spraying module.

[0106] The present application also provides a computer program product, which, when executed on a data processing device, is suitable for executing a program that initializes the following method steps: heating and humidifying the hygroscopic solution according to the return air through the return air side heat recovery module in the solution dehumidification unit, and obtaining a reflux solution by collecting the above-mentioned hygroscopic solutions after the heating and humidification treatment; heating and humidifying the fresh air using the above-mentioned reflux solution through the fresh air side heat recovery module in the above-mentioned solution dehumidification unit; reheating and humidifying the above-mentioned fresh air using the spray solution through the solution spray module in the above-mentioned solution dehumidification unit.

[0107] Optionally, when the computer program product executes the program, the hygroscopic solution can also be pumped from the fresh air side heat recovery module to the top of the return air side heat recovery module through the first solution circulation pump in the solution dehumidification unit; the hygroscopic solution is sprayed from the top of the return air side heat recovery module to wet the first filler in the return air side heat recovery module, wherein the hygroscopic solution contacts the return air in the first filler, and the hygroscopic solution is heated and humidified; after the hygroscopic solution is heated and humidified, the return air is discharged to the outdoors.

[0108] Optionally, when the computer program product executes the program, the reflux solution can also be sprayed from the top of the fresh air side heat recovery module to wet the second filler in the fresh air side heat recovery module, wherein the reflux solution contacts the fresh air in the second filler to heat and humidify the fresh air; after the fresh air is heated and humidified, the fresh air is transported to the solution spraying module.

[0109] The serial numbers of the above embodiments of the present invention are only for description and do not represent the advantages or disadvantages of the embodiments.

[0110] In the above embodiments of the present invention, the description of each embodiment has its own emphasis. For parts that are not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0111] In the several embodiments provided in this application, it should be understood that the disclosed technical content can be implemented in other ways. Among them, the device embodiments described above are only schematic. For example, the division of the units can be a logical function division. There may be other division methods in actual implementation. For example, multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of units or modules, which can be electrical or other forms.

[0112] The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed on multiple units. Some or all of the units may be selected according to actual needs to achieve the purpose of the present embodiment.

[0113] In addition, each functional unit in each embodiment of the present invention may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit. The above-mentioned integrated unit may be implemented in the form of hardware or in the form of software functional units.

[0114] If the integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present invention, in essence, or the part that contributes to the prior art, or all or part of the technical solution can be embodied in the form of a software product, and the computer software product is stored in a storage medium, including a number of instructions for a computer device (which can be a personal computer, a server or a network device, etc.) to perform all or part of the steps of the method described in each embodiment of the present invention. The aforementioned storage medium includes: U disk, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), mobile hard disk, magnetic disk or optical disk and other media that can store program codes.

[0115] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A solution dehumidification unit, characterized in that: include: The return air side heat recovery module is used to heat and humidify the hygroscopic solution in the solution dehumidification unit through the return air, and obtain the reflux solution by collecting the hygroscopic solution after the heating and humidification treatment; A fresh air side heat recovery module, connected to the return air side heat recovery module, for heating and humidifying the fresh air using the reflux solution; A solution spraying module, connected to the fresh air side heat recovery module, for reheating and humidifying the fresh air using a spraying solution; Wherein, the fresh air side heat recovery module is set to multiple levels; The solution dehumidification unit further includes: a multi-stage tank body, wherein each of the multi-stage fresh air side heat recovery modules is provided with a first-stage tank body at the bottom thereof for accommodating the moisture absorbing solution, and the bottom of the solution spraying module is provided with a first-stage tank body for accommodating the spraying solution; The solution dehumidification unit further includes: an interstage flow pipeline, disposed between the multi-stage tank bodies, for maintaining the concentration difference between the solutions in the multi-stage tank bodies within a predetermined range based on the circulation of the solutions between the multi-stage tank bodies; The return air side heat recovery module comprises: a first filler portion, which is used to accommodate a first filler in the return air side heat recovery module.

2. The solution dehumidification unit according to claim 1, characterized in that: The solution dehumidification unit also includes: A heat exchanger is connected to the solution spray module and is used to provide the spray solution with heat for reheating and humidifying the fresh air.

3. The solution dehumidification unit according to claim 2, characterized in that: The solution dehumidification unit also includes: a first solution circulation pump, connected to the fresh air side heat recovery module and the return air side heat recovery module, respectively, and used to pump the moisture absorbing solution in the fresh air side heat recovery module to the top of the return air side heat recovery module; The second solution circulation pump is connected to the solution spray module and the heat exchanger respectively, and is used to pump the spray solution at the bottom of the solution spray module to the heat exchanger for heating treatment, and pump the spray solution after heating treatment to the top of the solution spray module.

4. The solution dehumidification unit according to claim 3, characterized in that: The fresh air side heat recovery module comprises: a first fresh air side heat recovery module and a second fresh air side heat recovery module, wherein the first fresh air side heat recovery module and the second fresh air side heat recovery module are connected; A first tank body is provided at the bottom of the first fresh air side heat recovery module, and the first tank body is connected to the first solution circulation pump and is used to contain the moisture absorbing solution; A second tank is provided at the bottom of the second fresh air side heat recovery module for accommodating the moisture absorbing solution; A third tank body is disposed at the bottom of the solution spraying module. The third tank body is connected to the second solution circulation pump and is used to contain the spraying solution.

5. The solution dehumidification unit according to claim 4, characterized in that: The solution dehumidification unit also includes: A first interstage flow pipeline is disposed between the first tank body and the second tank body, and is used to maintain a concentration difference between the hygroscopic solution in the first tank body and the hygroscopic solution in the second tank body within a first predetermined range; The second interstage flow pipeline is arranged between the first tank body and the third tank body, and between the second tank body and the third tank body, and is used to maintain the concentration difference between the hygroscopic solution and the spray solution within a second predetermined range.

6. The solution dehumidification unit according to claim 1, characterized in that: The hygroscopic solution is sprayed from the top of the return air side heat recovery module to wet the first filler, the hygroscopic solution contacts the return air in the first filler, and after the hygroscopic solution is heated and humidified, the return air is discharged to the outside.

7. The solution dehumidification unit according to claim 6, characterized in that: The fresh air side heat recovery module comprises: The second filler portion is used to accommodate the second filler in the fresh air side heat recovery module, wherein the reflux solution is sprayed from the top of the fresh air side heat recovery module to wet the second filler, the reflux solution contacts the fresh air in the second filler, and after the fresh air is heated and humidified, the fresh air is transported to the solution spray module.

8. A method for controlling a solution dehumidification unit, characterized in that: include: The return air side heat recovery module in the solution dehumidification unit heats and humidifies the hygroscopic solution according to the return air, and obtains the reflux solution by collecting the hygroscopic solution after the heating and humidification treatment; The reflux solution is used to heat and humidify the fresh air through the fresh air side heat recovery module in the solution dehumidification unit; Reheating and humidifying the fresh air by spraying solution through a solution spray module in the solution dehumidification unit; The fresh air side heat recovery module is arranged in multiple stages; the solution dehumidification unit further comprises: a multi-stage tank body, wherein each of the multi-stage fresh air side heat recovery modules is provided with a primary tank body at the bottom thereof for accommodating the hygroscopic solution, and the solution spraying module is provided with a primary tank body at the bottom thereof for accommodating the spraying solution; The method further includes: maintaining the concentration difference between the solutions in the multi-stage tank bodies within a predetermined range based on the circulation of the solutions between the multi-stage tank bodies through an inter-stage flow pipeline disposed between the multi-stage tank bodies; The return air side heat recovery module comprises: a first filler portion, which is used to accommodate a first filler in the return air side heat recovery module.

9. The method according to claim 8, characterized in that Before the return air side heat recovery module in the solution dehumidification unit heats and humidifies the hygroscopic solution according to the return air, the method further includes: The moisture absorbing solution is pumped from the fresh air side heat recovery module to the top of the return air side heat recovery module through the first solution circulation pump in the solution dehumidification unit; The hygroscopic solution is sprayed from the top of the return air side heat recovery module to wet the first filler in the return air side heat recovery module, wherein the hygroscopic solution contacts the return air in the first filler, and the hygroscopic solution is heated and humidified; After the moisture absorbing solution is heated and humidified, the return air is discharged to the outside.

10. The method according to claim 9, characterized in that Before using the reflux solution to heat and humidify the fresh air through the fresh air side heat recovery module in the solution dehumidification unit, the method further includes: Spraying the reflux solution from the top of the fresh air side heat recovery module to wet the second filler in the fresh air side heat recovery module, wherein the reflux solution contacts the fresh air in the second filler to perform heating and humidification treatment on the fresh air; After the fresh air is heated and humidified, the fresh air is transported to the solution spraying module.

11. A device for controlling a solution dehumidification unit, characterized in that: include: The first processing module is used to heat and humidify the hygroscopic solution according to the return air through the return air side heat recovery module in the solution dehumidification unit, and obtain the reflux solution by collecting the hygroscopic solution after the heating and humidification treatment; A second processing module is used to heat and humidify the fresh air using the reflux solution through the fresh air side heat recovery module in the solution dehumidification unit; A third processing module is used to reheat and humidify the fresh air using a spray solution through a solution spray module in the solution dehumidification unit; The fresh air side heat recovery module is arranged in multiple stages; the solution dehumidification unit further comprises: a multi-stage tank body, wherein each of the multi-stage fresh air side heat recovery modules is provided with a primary tank body at the bottom thereof for accommodating the hygroscopic solution; the solution spray module is provided with a primary tank body at the bottom thereof for accommodating the spray solution; The device is also used to maintain the concentration difference between the solutions in the multi-stage tank bodies within a predetermined range based on the circulation of the solutions between the multi-stage tank bodies through the inter-stage flow pipelines arranged between the multi-stage tank bodies; The return air side heat recovery module comprises: a first filler portion, which is used to accommodate a first filler in the return air side heat recovery module.

12. A storage medium, characterized in that: The storage medium includes a stored program, wherein when the program is running, the device where the storage medium is located is controlled to execute the method for controlling a solution dehumidification unit according to any one of claims 8 to 10.

13. A processor, characterized in that: The processor is used to run a program, wherein the program, when running, executes the method for controlling a liquid dehumidification unit according to any one of claims 8 to 10.

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