Liquid desiccant air conditioner with improved humidity control efficiency using piezoelectric elements

Abstract

The present disclosure includes a dehumidification unit (1) that absorbs and removes moisture from the air by bringing air into direct contact with a liquid desiccant; The dehumidification unit (1) includes a regeneration unit (100) that removes moisture from the liquid desiccant used in the dehumidification unit (1) to restore the concentration of the liquid desiccant; wherein the dehumidification unit (1) comprises a pump tank (10) in which the liquid desiccant is stored, a dehumidification tank (50) formed with an indoor intake port (51) for drawing in indoor air and an indoor discharge port (52) for discharging dehumidified air into the indoor space, a nozzle (30) disposed in the dehumidification tank (50) for discharging the liquid desiccant, a main pump (20) for pumping the liquid desiccant from the pump tank (10) to the nozzle (30), an indoor blower fan (70) for circulating indoor air by flowing the air in the dehumidification tank (50), a main filling member (60) disposed in the dehumidification tank (50) for absorbing the liquid desiccant sprayed from the nozzle (30), and the main pump (20). The present invention relates to a liquid desiccant air conditioning device characterized by improving the contact efficiency between the liquid desiccant and air by including a main cooler (80) disposed between nozzles (30) and cooling the liquid desiccant discharged from the main pump (20), and further including a piezoelectric module (200) that provides vibration to the main filling member (60).

Description

Technology Field

[0001] The embodiments of the present disclosure relate to a liquid desiccant air conditioning system with improved humidity control efficiency using a piezoelectric element. Background Technology

[0002] Generally, a compression-type cooling system consists of a compressor, condenser, expansion valve, evaporator, piping, and a blower. The cycle is configured such that heat is removed from the treated air through the evaporation of refrigerant in the evaporator to cool the treated air, which is then used for cooling the building, and the removed heat is released to the outside air through the condenser.

[0003] However, in the aforementioned compression-type cooling system, if the latent heat load among the cooling loads of the air to be processed increases, the evaporator temperature must be excessively lowered below the air dew point temperature—below the comfortable indoor air temperature required to condense and discharge moisture from the air. This may lead to problems such as reduced refrigeration cycle efficiency and decreased comfort.

[0004] In addition, although the condenser must utilize outside air to discharge the condensation heat generated when the refrigerant condenses, there is a disadvantage that as the outside temperature rises during the summer, it becomes difficult to discharge heat from the refrigerant to the outside air through the heat exchanger.

[0005] A liquid desiccant dehumidification system utilizing a liquid desiccant to remove moisture from the air consists of a dehumidification unit, a regeneration unit, a solution heat exchanger, a solution pump, a solution distributor, and an eliminator to prevent losses caused by the scattering of the desiccant solution.

[0006] This liquid desiccant dehumidifier uses liquid desiccant solutions such as lithium chloride aqueous solution, triethylene glycol aqueous solution, calcium chloride aqueous solution, and lithium bromide aqueous solution, which have a very high affinity for moisture in the air, to remove moisture from the air by bringing them into direct contact with the air being treated in the dehumidification section of the system, thereby performing dehumidifying air conditioning.

[0007] The operation of a liquid desiccant dehumidification system utilizes the vapor pressure difference between the vapor pressure of the liquid desiccant and the partial pressure of water vapor in the air as the driving force for mass transfer to absorb or release moisture, and the vapor pressure of the liquid desiccant used as the dehumidifying solution depends on the temperature and concentration of the solution.

[0008] In order to improve the system efficiency of a dehumidifier by enhancing the heat and mass transfer capacity during the air dehumidification process in the dehumidification section of a liquid desiccant dehumidification system, it is important to increase the contact area and contact time between the air and the liquid desiccant, and isothermal dehumidification through the removal of latent heat of condensation and heat of absorption generated when moisture from the air is absorbed by the liquid desiccant plays an important role in improving the system efficiency of the dehumidifier.

[0009] If the contact efficiency between the dehumidifying solution and the outside air is improved, the system efficiency of the dehumidifier can be significantly improved. Prior art literature

[0010] Republic of Korea Registered Patent No. 10-0510774 The problem to be solved

[0011] The embodiments of the present disclosure aim to provide a liquid desiccant air conditioning system with improved humidity control efficiency by utilizing a piezoelectric element that improves upon the problems of the aforementioned conventional air conditioning system, and to provide a closed-type liquid desiccant air conditioning system using a pressure vessel capable of compactly implementing a structure for regenerating liquid desiccant.

[0012] The technical problems to be solved in the embodiments of the present disclosure are not limited to those mentioned above, and other unmentioned technical problems may be considered by those skilled in the art from the various embodiments described below. means of solving the problem

[0013] According to one embodiment of the present disclosure, a dehumidifying unit (1) that absorbs and removes moisture from the air by bringing air into direct contact with a liquid desiccant; The dehumidification unit (1) includes a regeneration unit (100) that removes moisture from the liquid desiccant used in the dehumidification unit (1) to restore the concentration of the liquid desiccant; wherein the dehumidification unit (1) comprises a pump tank (10) in which the liquid desiccant is stored, a dehumidification tank (50) formed with an indoor intake port (51) for drawing in indoor air and an indoor discharge port (52) for discharging dehumidified air into the indoor space, a nozzle (30) disposed in the dehumidification tank (50) for discharging the liquid desiccant, a main pump (20) for pumping the liquid desiccant from the pump tank (10) to the nozzle (30), an indoor blower fan (70) for circulating indoor air by flowing the air in the dehumidification tank (50), a main filling member (60) disposed in the dehumidification tank (50) for absorbing the liquid desiccant sprayed from the nozzle (30), and the main pump (20). A liquid desiccant air conditioning device can be provided, characterized by improving the contact efficiency between the liquid desiccant and air by including a main cooler (80) disposed between the nozzles (30) and cooling the liquid desiccant discharged from the main pump (20), and further including a piezoelectric module (200) that provides vibration to the main filling member (60).

[0014] The above dehumidification unit (1) comprises: a first dehumidification pipe (41) connecting the pump tank (10) and the main pump (20) to guide the flow of liquid desiccant; a second dehumidification pipe (42) connecting the main pump (20) and the nozzle (30) to guide the flow of liquid desiccant discharged from the main pump (20); a third dehumidification pipe (43) connecting the main pump (20) and the regeneration unit (100) to guide the flow of liquid desiccant discharged from the main pump (20); a fourth dehumidification pipe (44) connecting the regeneration unit (100) and the dehumidification tank (50) to recover the liquid desiccant discharged from the regeneration unit (100) to the dehumidification tank (50); and a dehumidification tank (50) connecting the pump tank (10). It may further include a fifth dehumidification pipe (45) that recovers the liquid desiccant of the dehumidification tank (50) to the pump tank (10).

[0015] The above piezoelectric module (200) may include a detachable case (210) formed to be detachably attached to one side wall of the second tank part (57), a plurality of piezoelectric elements (220) disposed within the detachable case (210), and a plurality of vibration transmission members (230) interposed within the main charging member (60) in the second tank part (57). Effects of the invention

[0016] According to the embodiments of the present disclosure, the present invention has the advantage of significantly reducing the overall size of the regeneration section because it circulates compressed air through an air compressor and does not use a pump for liquid desiccant flow or a fan for air flow in the regeneration section.

[0017] In addition, according to the embodiments of the present disclosure, the humidity control effect can be improved by increasing the contact efficiency between the liquid desiccant and air.

[0018] In addition, according to the embodiments of the present disclosure, the present invention has the advantage of being able to implement the entire size of the regeneration unit compactly because it can satisfy the airflow of a large fan with a small-sized air compressor. Brief explanation of the drawing

[0019] The accompanying drawings, included as part of the detailed description to aid in understanding the embodiments, provide various embodiments and explain the technical features of the various embodiments together with the detailed description. FIG. 1 is a configuration diagram of a liquid desiccant air conditioning system with improved humidity control efficiency using a piezoelectric element according to an embodiment of the present invention. FIG. 2 is a drawing showing an example in which a piezoelectric module is placed in the dehumidification tank (50) of the liquid desiccant air conditioning system illustrated in FIG. 1. FIG. 3 is a drawing showing an example of the piezoelectric module of FIG. 2 separated. Specific details for implementing the invention

[0020] Hereinafter, specific embodiments of the present disclosure will be described with reference to the drawings. However, this is merely an example and the present disclosure is not limited thereto.

[0021] In describing the present disclosure, detailed descriptions of prior art related to the present disclosure are omitted if it is determined that such detailed descriptions would unnecessarily obscure the essence of the present disclosure. Furthermore, the terms described below are defined considering their functions within the present disclosure, and these definitions may vary depending on the intentions or practices of the user or operator. Therefore, their definitions should be based on the content throughout this specification.

[0022] Terms such as first, second, A, B, etc., may be used to describe various components, but said components shall not be limited by said terms. These terms are used solely for the purpose of distinguishing one component from another. For example, without departing from the scope of the present invention, the first component may be named the second component, and similarly, the second component may be named the first component. The term "and / or" includes a combination of a plurality of related described items or any of a plurality of related described items.

[0023] When it is stated that one component is "connected" or "connected" to another component, it should be understood that while it may be directly connected or connected to that other component, there may also be other components in between. On the other hand, when it is stated that one component is "directly connected" or "directly connected" to another component, it should be understood that there are no other components in between.

[0024] The terms used in this application are used merely to describe specific embodiments and are not intended to limit the invention. The singular expression includes the plural expression unless the context clearly indicates otherwise. In this application, terms such as "comprising" or "having" are intended to specify the existence of the features, numbers, steps, actions, components, parts, or combinations thereof described in the specification, and should be understood as not precluding the existence or addition of one or more other features, numbers, steps, actions, components, parts, or combinations thereof.

[0025] Unless otherwise defined, all terms used herein, including technical or scientific terms, have the same meaning as generally understood by those skilled in the art to which the present invention pertains. Terms such as those defined in commonly used dictionaries should be interpreted as having a meaning consistent with their meaning in the context of the relevant technology, and should not be interpreted in an ideal or overly formal sense unless explicitly defined in this application.

[0026] In this document, "configured to" may be used interchangeably with, depending on the context, for example, in hardware or software, "suitable for," "capable of," "modified to," "made to," "capable of," or "designed to." In some situations, the expression "device configured to" may mean that the device is "capable of" doing something together with other devices or components.

[0027] The technical concept of the present disclosure is determined by the claims, and the following embodiments are merely a means to efficiently explain the technical concept of the present disclosure to those skilled in the art to which the present disclosure belongs.

[0029] FIG. 1 is a configuration diagram of a liquid desiccant air conditioning system with improved humidity control efficiency using a piezoelectric element according to an embodiment of the present invention, FIG. 2 is a diagram showing an example in which a piezoelectric module is placed in a dehumidification tank (50) of the liquid desiccant air conditioning system shown in FIG. 1, and FIG. 3 is a diagram showing an example in which the piezoelectric module of FIG. 2 is separated.

[0030] Referring to FIGS. 1 to 3, a liquid desiccant air conditioning device with improved humidity control efficiency using a piezoelectric element according to one embodiment of the present invention includes a dehumidification unit (1) that absorbs and removes moisture from the air by bringing air into direct contact with the liquid desiccant, and a regeneration unit (100) that removes moisture from the liquid desiccant used in the dehumidification unit (1) to restore the concentration of the liquid desiccant.

[0031] The above dehumidification unit (1) includes a pump tank (10) in which liquid desiccant is stored, a dehumidification tank (50) formed with an indoor intake port (51) for inhaling indoor air and an indoor discharge port (52) for discharging dehumidified air into the indoor space, a nozzle (30) disposed in the dehumidification tank (50) for discharging liquid desiccant, a main pump (20) for pumping liquid desiccant from the pump tank (10) to the nozzle (30), an indoor blower fan (70) for circulating indoor air by flowing air from the dehumidification tank (50), a main filling member (60) disposed in the dehumidification tank (50) for absorbing liquid desiccant sprayed from the nozzle (30), and a main cooler (80) disposed between the main pump (20) and the nozzle (30) for cooling the liquid desiccant discharged from the main pump (20).

[0032] The above liquid desiccant may be an aqueous solution of lithium chloride, an aqueous solution of triethylene glycol, an aqueous solution of calcium chloride, or an aqueous solution of lithium bromide.

[0033] The above dehumidification unit (1) comprises: a first dehumidification pipe (41) connecting the pump tank (10) and the main pump (20) to guide the flow of liquid desiccant; a second dehumidification pipe (42) connecting the main pump (20) and the nozzle (30) to guide the flow of liquid desiccant discharged from the main pump (20); a third dehumidification pipe (43) connecting the main pump (20) and the regeneration unit (100) to guide the flow of liquid desiccant discharged from the main pump (20); a fourth dehumidification pipe (44) connecting the regeneration unit (100) and the dehumidification tank (50) to recover the liquid desiccant discharged from the regeneration unit (100) to the dehumidification tank (50); and a dehumidification tank (50) connecting the pump tank (10). It includes a fifth dehumidification pipe (45) that recovers liquid desiccant from the dehumidification tank (50) to the pump tank (10).

[0034] In this embodiment, the second dehumidification pipe (42) and the third dehumidification pipe (43) are configured to branch out from the discharge side of the main pump (20).

[0035] The main cooler (80) is positioned after the branching point of the second dehumidification pipe (42) and the third dehumidification pipe (43), and can increase the amount of dehumidification by cooling the liquid desiccant flowing through the nozzle (30).

[0036] For liquid desiccant, the dehumidification capacity increases as the concentration increases and as the temperature decreases. Conversely, for liquid desiccant, the dehumidification capacity decreases as the concentration decreases and as the temperature increases.

[0037] Therefore, in the dehumidification unit (1), the liquid desiccant is cooled before contacting the indoor air with the liquid desiccant to increase the moisture capacity. However, when the liquid desiccant contains moisture, the concentration decreases, and as it approaches the limit, the dehumidification performance decreases.

[0038] So, the liquid desiccant with reduced concentration is sent to the regeneration unit (100) to release the contained moisture into the air, thereby restoring the concentration of the liquid desiccant.

[0039] In the above regeneration unit (100), the liquid desiccant is heated to facilitate the release of moisture.

[0040] A check valve (43a) and an opening / closing valve (43b) are installed in the third dehumidification pipe (43), and the third dehumidification pipe (43) can be selectively opened or closed.

[0041] The regeneration unit (100) blocks the backflow of fluid through the check valve (43a) of the third dehumidification pipe (43).

[0042] The above-mentioned fifth dehumidification pipe (45) is positioned lower than the above-mentioned fourth dehumidification pipe (44), thereby allowing the liquid desiccant recovered from the regeneration unit (100) to move through the head difference.

[0043] The above dehumidification tank (50) stores liquid desiccant inside.

[0044] The above dehumidification tank (50) includes a first tank passage (53) connected to an indoor intake port (51), a second tank passage (54) connected to an indoor discharge port (52), and a tank connection passage (55) connecting the first tank passage (53) and the second tank passage (54).

[0045] The first tank flow path (53) and the second tank flow path (54) are arranged in parallel, and the tank connecting flow path (55) changes the direction of air flow by 180 degrees.

[0046] Liquid desiccant is stored in the lower part of the tank connection channel (55) above.

[0047] The above dehumidification tank (50) includes a tank storage section (58) in which liquid desiccant is stored, a first tank section (56) that extends upward from one side of the tank storage section (58) and in which the indoor intake port (51) is formed, and a second tank section (57) that extends upward from the other side of the tank storage section (58) and in which the indoor discharge port (52) is formed.

[0048] The first tank passage (53) is formed inside the first tank section (56), the second tank passage (54) is formed inside the second tank section (57), and the tank connection passage (55) is formed inside the tank storage section (58).

[0049] The main filling member (60) is positioned on the side of the indoor discharge port (52) and, in this embodiment, is positioned inside the second tank part (57).

[0050] The nozzle (30) is spaced apart and positioned above the main filling member (60). The nozzle (30) is positioned inside the second tank section (57).

[0051] Liquid desiccant sprayed from the nozzle (30) wets the main filling member (60), and the main filling member (60) is formed of a material capable of absorbing liquid desiccant, and comes into contact with the impregnated liquid desiccant as air flows from the lower side to the upper side.

[0052] The contact time with the liquid desiccant and indoor air is increased through the main filling member (60) above.

[0053] The liquid desiccant sprayed from the nozzle (30) falls to the lower side of the main filling member (60) and is stored in the tank storage unit (58).

[0054] In this embodiment, the indoor blower fan (70) is placed in the second tank section (57) and is placed above the nozzle (30).

[0055] An air conditioning device according to one embodiment of the present invention may further include a piezoelectric module (200) for improving the contact efficiency between the liquid desiccant sprayed from the nozzle (30) and the outside air.

[0056] The piezoelectric module (200) can be positioned inside the second tank section (57) to be in contact with the main filling member (60).

[0057] The piezoelectric module (200) may include a detachable case (210) formed to be detachably attached to one side wall of the second tank portion (57), a plurality of piezoelectric elements (220) disposed within the detachable case (210), and a plurality of vibration transmission members (230) interposed within the main charging member (60) in the second tank portion (57).

[0058] The detachable case (210) may be attached to one side of the area in which the main filling member (60) is disposed in the height direction of the second tank section (57). A plurality of vibration transmission members (230) may be disposed in the height direction of the second tank section (57) corresponding to the height at which the detachable case (210) is attached.

[0059] That is, with the detachable case (210) attached to one side of the second tank part (57), a plurality of piezoelectric elements (220) and a plurality of vibration transmission members (230) can be arranged to face or come into contact with each other.

[0060] Each of the vibration transmission members (230) may be formed to have a predetermined length so as to cross the width direction of the second tank part (57), and a piezoelectric element (220) may be arranged to be in contact with one end of the vibration transmission member (230) in the length direction.

[0061] The vibration generated when the piezoelectric element (220) operates can be transmitted through the vibration transmission member (230), and the vibration can be transmitted to the entire main filling member (60) with a plurality of vibration transmission members (230) interposed inside.

[0062] Through this, after the liquid desiccant sprayed from the nozzle (30) falls onto the main filling member (60), the main filling member (60) vibrates, and the contact area between the liquid desiccant and the outside air can be greatly increased. Therefore, the humidity control efficiency of the outside air through the liquid desiccant can be improved.

[0064] Although the present disclosure has been described in detail through representative embodiments above, those skilled in the art will understand that various modifications can be made to the above-described embodiments without departing from the scope of the present disclosure. Therefore, the scope of the present disclosure should not be limited to the described embodiments, but should be defined by the claims set forth below as well as equivalents thereof. Explanation of the symbols

[0065] 1 : Dehumidification unit 100 : Regeneration section 200: Piezoelectric module 210: Detachable case 220: Piezoelectric element 230: Vibration transmission member

Claims

Claim 1 A dehumidifying unit (1) that absorbs and removes moisture from the air by bringing the air into direct contact with a liquid desiccant; The dehumidification unit (1) includes a regeneration unit (100) that removes moisture from the liquid desiccant used in the dehumidification unit (1) to restore the concentration of the liquid desiccant; wherein the dehumidification unit (1) comprises a pump tank (10) in which the liquid desiccant is stored, a dehumidification tank (50) formed with an indoor intake port (51) for drawing in indoor air and an indoor discharge port (52) for discharging dehumidified air into the indoor space, a nozzle (30) disposed in the dehumidification tank (50) for discharging the liquid desiccant, a main pump (20) for pumping the liquid desiccant from the pump tank (10) to the nozzle (30), an indoor blower fan (70) for circulating indoor air by flowing the air in the dehumidification tank (50), a main filling member (60) disposed in the dehumidification tank (50) for absorbing the liquid desiccant sprayed from the nozzle (30), and the main pump (20). A liquid desiccant air conditioning device characterized by improving the contact efficiency between the liquid desiccant and air by including a main cooler (80) disposed between the nozzles (30) and cooling the liquid desiccant discharged from the main pump (20), and further including a piezoelectric module (200) that provides vibration to the main filling member (60). Claim 2 In claim 1, the dehumidification unit (1) comprises: a first dehumidification pipe (41) connecting the pump tank (10) and the main pump (20) to guide the flow of liquid desiccant; a second dehumidification pipe (42) connecting the main pump (20) and the nozzle (30) to guide the flow of liquid desiccant discharged from the main pump (20); a third dehumidification pipe (43) connecting the main pump (20) and the regeneration unit (100) to guide the flow of liquid desiccant discharged from the main pump (20); a fourth dehumidification pipe (44) connecting the regeneration unit (100) and the dehumidification tank (50) to recover the liquid desiccant discharged from the regeneration unit (100) to the dehumidification tank (50); and connecting the dehumidification tank (50) and the pump tank (10). A liquid desiccant air conditioning device further comprising a fifth desiccant pipe (45) for recovering the liquid desiccant of the desiccant tank (50) to the pump tank (10). Claim 3 A liquid desiccant air conditioning device according to claim 1, wherein the piezoelectric module (200) comprises a detachable case (210) formed to be detachably attached to one side wall of the second tank portion (57), a plurality of piezoelectric elements (220) disposed within the detachable case (210), and a plurality of vibration transmission members (230) interposed within the main filling member (60) in the second tank portion (57).

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