JP5089672B2 - Dehumidifier - Google Patents

Description

  The present invention relates to a dehumidifier that performs dehumidification using a hygroscopic liquid such as lithium chloride (LiCl).

  Conventionally, for example, a dehumidifying apparatus that performs dehumidification using a hygroscopic liquid such as lithium chloride is known. The higher the solution concentration and the lower the temperature, the lower the saturated vapor pressure of the hygroscopic liquid, and the easier it is to absorb moisture. Conversely, the hygroscopic liquid has a lower saturated solution pressure and a higher temperature, the saturated vapor pressure becomes higher, and moisture is more easily desorbed. The dehumidifying device performs the dehumidifying process by making the hygroscopic liquid absorb moisture in the air by using such properties of the hygroscopic liquid.

  The dehumidifying apparatus includes a processor that performs a dehumidifying process using a hygroscopic liquid and a regenerator that regenerates the hygroscopic liquid that has been used for dehumidification and has absorbed moisture. In a processing machine, the process which removes the water | moisture content in air by making a hygroscopic liquid with a high density | concentration and low temperature contact with air is performed. At this time, the temperature of the hygroscopic liquid rises due to the heat of dilution. On the other hand, in a regenerator, the moisture in the hygroscopic liquid is released to the air by bringing the hygroscopic liquid having a low concentration (diluted) used in the dehumidification process into contact with the air. Regenerate the hygroscopic liquid. At this time, the hygroscopic liquid is deprived of the heat of evaporation and the temperature decreases.

  In the dehumidifying apparatus, a heat pump may be used to supply a hygroscopic liquid having a low temperature to the processor and to supply a hygroscopic liquid having a high temperature to the regenerator (see, for example, Patent Document 1). In the heat pump, an evaporator that cools the hygroscopic liquid supplied to the processor, a compressor that compresses the refrigerant, a condenser that heats the hygroscopic liquid supplied to the regenerator, and a decompressor that depressurizes the refrigerant. A closed circuit is formed by connecting the refrigerant pipes in order. The heat pump sucks heat from the hygroscopic liquid supplied to the processor by the evaporator, and releases heat to the hygroscopic liquid supplied to the regenerator by the condenser.

JP 2005-214595 A

  The heat pump used in the dehumidifying apparatus is designed or controlled to cool the hygroscopic liquid supplied to the processing machine to a necessary temperature in the evaporator, and the hygroscopic liquid is heated in the condenser according to the course. . For this reason, the temperature of the hygroscopic liquid supplied to the regenerator may increase excessively, and the hygroscopic liquid may be excessively concentrated. In addition, when using the exhaust heat from another exhaust heat source to heat the hygroscopic liquid supplied to the regenerator, the temperature of the hygroscopic liquid increases excessively when the amount of exhaust heat increases. The hygroscopic liquid may be excessively concentrated.

  Then, an object of this invention is to suppress the excessive concentration of a hygroscopic liquid in the dehumidification apparatus which dehumidifies using a hygroscopic liquid.

The dehumidifying device of the present invention is a dehumidifying device that dehumidifies air by absorbing moisture in the air into the hygroscopic liquid, and performs a dehumidifying treatment machine and regeneration of the hygroscopic liquid used in the dehumidifying treatment. A regenerator to perform, a heater for heating the hygroscopic liquid supplied to the regenerator, detection means for detecting the degree of concentration of the hygroscopic liquid in the regenerator, and the hygroscopic material regenerated by the regenerator A dehumidifying process is performed by the water supply means for supplying water to the functional liquid and the processor, the hygroscopic liquid used for the dehumidifying process is regenerated by the regenerator, and the heater is added to the regenerator. wherein when the heating of the hygroscopic liquid to be supplied, the when the degree of concentration which is detected by the detection means exceeds a predetermined value, so as to replenish the water in the hygroscopic liquid which has been reproduced by the reproducer Control the water supply And a control means.

With this configuration, when the hygroscopic liquid used in the dehumidifying process is regenerated in the regenerator, the detection unit detects the degree of concentration of the hygroscopic liquid in the regenerator, and the degree of concentration is a predetermined value. If it exceeds, water is replenished to the hygroscopic liquid, so that excessive concentration of the hygroscopic liquid is suppressed.

In the dehumidifying apparatus, the detection unit is a temperature sensor that detects a temperature of exhaust from the regenerator, and the control unit is configured to detect the temperature when the temperature detected by the temperature sensor exceeds a predetermined value. The water supply means is controlled to supply water to the hygroscopic liquid in the regenerator.

  When the hygroscopic liquid supplied to the regenerator is excessively heated by the heater and the temperature rises, the temperature of the exhaust gas from the regenerator also rises. Therefore, the detection means can detect the degree of concentration of the hygroscopic liquid by detecting the temperature of the exhaust gas from the regenerator.

In the above dehumidifying apparatus, the detection means is a hygroscopic liquid heated by a heater and supplied to the regenerator, or a temperature sensor that detects the temperature of the hygroscopic liquid in the regenerator, and the control means When the temperature detected by the temperature sensor exceeds a predetermined value, the water supply means is controlled to supply water to the hygroscopic liquid in the regenerator.

  When excessive heating is performed on the hygroscopic liquid by the heater, excessive moisture is desorbed from the hygroscopic liquid in the regenerator, and the hygroscopic liquid is excessively concentrated. Therefore, the detection means can detect the degree of concentration of the hygroscopic liquid by detecting the temperature of the hygroscopic liquid heated by the heater and supplied to the regenerator or the temperature of the hygroscopic liquid in the regenerator.

In the above dehumidifying apparatus, the detection means is a concentration sensor that detects the concentration of the hygroscopic liquid supplied to the regenerator or the concentration of the hygroscopic liquid in the regenerator, and the control means is detected by the concentration sensor. When the concentration exceeds a predetermined value, the water supply means is controlled to supply water to the hygroscopic liquid in the regenerator.

  The degree of concentration of the hygroscopic liquid can also be detected by directly detecting the concentration of the hygroscopic liquid supplied to the regenerator or the concentration of the hygroscopic liquid in the regenerator with a concentration sensor.

  In the above dehumidifying apparatus, the heater is a part of a heat pump, and the heat pump includes a cooler that cools the hygroscopic liquid supplied to the processor.

  Cooling the hygroscopic liquid used in the dehumidification process using a heat pump and heating the regenerated hygroscopic liquid improve energy efficiency, but on the other hand, heating the regenerated hygroscopic liquid will be performed in a random manner. In some cases, the regenerated hygroscopic liquid may be excessively heated and concentrated excessively. According to said structure, even when heating the hygroscopic liquid reproduced | regenerated using a heat pump, the problem that a hygroscopic liquid concentrates excessively can be avoided.

In the dehumidifying apparatus, the heater heats the hygroscopic liquid using waste heat .

The energy efficiency is improved when performing the heating of the hygroscopic liquid to be regenerated after dehumidification process using waste heat, on the one hand, the heating of the hygroscopic liquid to be played depends on the amount of waste heat from the waste heat source In some cases, the regenerated hygroscopic liquid may be excessively heated and concentrated excessively. According to said structure, even when heating the hygroscopic liquid reproduced | regenerated using waste heat , the problem that a hygroscopic liquid concentrates excessively can be avoided.

The regenerator of the present invention is a regenerator that regenerates the hygroscopic liquid used in the dehumidification process, and is heated by the heater for heating the hygroscopic liquid used in the dehumidification process. In the case where the detection means for detecting the degree of concentration of the hygroscopic liquid, the water supply means for supplying water to the hygroscopic liquid, and the heater is heating the hygroscopic liquid used in the dehumidification process, Control means for controlling the water supply means to replenish water to the hygroscopic liquid when the degree of concentration detected by the detection means exceeds a predetermined value .
The dehumidifying device control method of the present invention is a dehumidifying device control method for dehumidifying the air in the dehumidifying target space by causing the hygroscopic liquid to absorb moisture in the air, and regenerates the hygroscopic liquid used for dehumidification. A heating step for heating the hygroscopic liquid, a detection step for detecting the degree of concentration of the hygroscopic liquid heated in the heating step, and a case where the hygroscopic liquid is heated in the heating step . when the degree of concentration which is detected by the detecting step exceeds a predetermined value, and a water supply step of supplying water to the hygroscopic liquid.

  According to the present invention, the detection means detects the degree of concentration of the hygroscopic liquid, and when the degree of concentration exceeds a predetermined value, the hygroscopic liquid is replenished with water. Concentration is suppressed.

It is a figure which shows the structure of the humidity control apparatus of the 1st Embodiment of this invention. It is a figure which shows the structure of the reproducing | regenerating apparatus of the 2nd Embodiment of this invention. It is a figure which shows the structure of the reproducing | regenerating apparatus of the 3rd Embodiment of this invention.

  Hereinafter, a dehumidifying apparatus according to an embodiment of the present invention will be described with reference to the drawings. The dehumidifying device according to the embodiment of the present invention is configured as a humidity control device having a function of humidifying air in addition to a function of dehumidifying air. Hereinafter, the term “humidification” is used to include dehumidification and humidification. However, the dehumidifying apparatus of the present invention may be a dehumidifying apparatus that does not include a humidifying function.

(First embodiment)
FIG. 1 is a diagram illustrating a configuration of a humidity control apparatus 1 according to the first embodiment. First, the whole structure of the humidity control apparatus 1 is demonstrated. The humidity control apparatus 1 takes in air and makes the humidity adjustment by bringing the taken-in air into gas-liquid contact with the hygroscopic liquid L, and the hygroscopic liquid L used for the humidity control in the processing machine 10. And a regenerator 30 that performs the replay.

  Here, the regeneration of the hygroscopic liquid L refers to returning the concentration of the hygroscopic liquid L whose concentration has been changed by performing humidity adjustment to a state before being used for humidity adjustment. For example, in the case of dehumidification, the hygroscopic liquid L having a high solution concentration is cooled, and the hygroscopic liquid L absorbs moisture in the air by bringing the cooled hygroscopic liquid L into contact with air. Since moisture is absorbed by the hygroscopic liquid L by this treatment, the solution concentration of the hygroscopic liquid L is lowered. Since the hygroscopic liquid L having a low solution concentration cannot perform sufficient dehumidification, the moisture is desorbed from the hygroscopic liquid L to return to the hygroscopic liquid L having a high solution concentration. In the case of humidification, on the contrary, the solution concentration of the hygroscopic liquid L is increased by the humidification treatment, so that the hygroscopic liquid L is returned to the hygroscopic liquid L having a low solution concentration by absorbing moisture.

  In the present embodiment, as the hygroscopic liquid L, an aqueous solution of a hygroscopic agent is used. Lithium chloride (LiCl) is used as the moisture absorbent. However, the hygroscopic liquid is not limited to an aqueous lithium chloride solution, but a salt solution having a deliquescent property such as saline, a polyhydric alcohol having a high hygroscopic property such as glycerin, ethylene glycol or propylene glycol, or other hygroscopic property. An inexpensive liquid may be used.

  The processor 10 is an indoor unit that regulates the humidity of indoor air, and the regenerator 30 is an outdoor unit that regenerates the hygroscopic liquid L by transferring moisture to and from the outside air. Although FIG. 1 shows an example in which one regenerator 30 is connected to one processor 10, a configuration in which one regenerator 30 is connected to a plurality of processors 10 may be adopted. For example, when the humidity control apparatus 1 is installed in an apartment house or a large supermarket, the processing machines 10 are installed in each room or floor, and one regenerator 30 connected to each processing machine 10 is installed outside. It can also be set as the aspect to do.

  The processor 10 and the regenerator 30 are connected by a first hygroscopic liquid conduit 50 and a second hygroscopic liquid conduit 51. The first hygroscopic liquid pipe 50 is a pipe for sending the hygroscopic liquid L from the processor 10 to the regenerator 30, and the second hygroscopic liquid pipe 51 is a hygroscopic pipe from the regenerator 30 to the processor 10. This is a conduit for feeding the sex liquid L. By using the first hygroscopic liquid conduit 50 and the second hygroscopic liquid conduit 51 to circulate the hygroscopic liquid L between the processor 10 and the regenerator 30, the moisture absorption used in the processor 10. The property liquid L can be regenerated by the regenerator 30 and returned to the processor 10.

  The humidity control apparatus 1 further includes a heat pump 21 that controls the temperature of the hygroscopic liquid L by exchanging heat with the hygroscopic liquid L. The heat pump 21 performs heat exchange between the first heat exchanger 25 that exchanges heat with the hygroscopic liquid L supplied to the processor 10 and the hygroscopic liquid L supplied to the regenerator 30. 2 heat exchangers 26. The humidity control apparatus 1 further includes a heat exchanger 54 that performs heat exchange between the first hygroscopic liquid conduit 50 and the second hygroscopic liquid conduit 51.

  Next, the configuration of the processor 10 will be described. The processor 10 includes a housing 11 having an intake port 12 and an exhaust port 13. The exhaust port 13 has an exhaust fan 14 and forcibly exhausts the air in the housing 11. Further, by discharging air from the inside of the housing 11, the inside of the housing 11 becomes negative with respect to the outside, and the air outside the housing 11 is taken into the housing 11 through the air inlet 12.

  The housing 11 includes a hygroscopic liquid supply unit 15, a filler 16, and a liquid tank 17. The hygroscopic liquid supply unit 15 has a plurality of nozzles for dropping the hygroscopic liquid L. The hygroscopic liquid supply unit 15 supplies the hygroscopic liquid L to the filler 16 by dropping the hygroscopic liquid L from a plurality of nozzles.

  The filler 16 is provided between the hygroscopic liquid supply unit 15 and the liquid tank 17 and temporarily retains the hygroscopic liquid L supplied from the hygroscopic liquid supply unit 15. The filler 16 is provided for the purpose of increasing the contact area between the hygroscopic liquid L and air and preventing the hygroscopic liquid L from scattering. As the filler, a water-immersed filter medium may be used, or copper, aluminum, or stainless steel heat conductive fins may be used.

  The air taken in from the air inlet 12 is supplied to the filler 16 from below (in FIG. 1, arrows indicate the flow of air). Thereby, the hygroscopic liquid L supplied from the upper side and the air supplied from the lower side come into contact with each other in the filler 16, and moisture is exchanged between the hygroscopic liquid L and the air.

  Further, the processor 10 has a pipe 18 for supplying the hygroscopic liquid L in the liquid tank 17 to the hygroscopic liquid supply unit 15. The pipe 18 connects the liquid tank 17 and the hygroscopic liquid supply unit 15. A pump 19 is attached to the pipe 18, and the pump 19 sucks up the hygroscopic liquid L in the liquid tank 17.

  The first hygroscopic liquid conduit 50 for sending the hygroscopic liquid L in the liquid tank 17 to the regenerator 30 is connected to the pipe 18 for sucking the hygroscopic liquid L from the liquid tank 17 through a three-way valve 55. ing. The three-way valve 55 controls the amount of the hygroscopic liquid L sent to the hygroscopic liquid supply unit 15 of the processor 10 and the amount of the hygroscopic liquid L sent to the regenerator 30 through the first hygroscopic liquid conduit 50.

  Next, the configuration of the regenerator 30 will be described. The regenerator 30 includes a housing 31 having an intake port 32 and an exhaust port 33. The regenerator 30 has an exhaust fan 34 and forcibly exhausts the air in the housing 31. Further, by exhausting air from the inside of the casing 31, outside air is taken into the casing 31 through the intake port 32. Near the exhaust port 33 of the regenerator 30, a temperature sensor 61 for detecting the temperature of the exhaust is provided.

  In the casing 31, a hygroscopic liquid supply unit 35 that supplies the hygroscopic liquid L, a filler 36 that temporarily stores the hygroscopic liquid L, and a liquid that contains the absorbent liquid L that has passed through the filler 36. A tank 37 is provided. The hygroscopic liquid supply unit 35 has a plurality of nozzles for dropping the hygroscopic liquid L. The filler 36 is provided between the hygroscopic liquid supply unit 35 and the liquid tank 37 and is configured similarly to the filler 16 of the processing machine 10. The liquid tank 37 is connected to the first hygroscopic liquid conduit 50, and the hygroscopic liquid L in the liquid tank 37 is sucked up by the action of the pump 52.

  A second hygroscopic liquid conduit 51 is connected to the liquid tank 37. The hygroscopic liquid L in the liquid tank 37 returns to the processor 10 through the second hygroscopic liquid pipe 51. The amount of the hygroscopic liquid L returning from the regenerator 30 to the processor 10 is adjusted by a valve 53. In the present embodiment, the valve 53 controls the amount of the hygroscopic liquid L that is returned to the processor 10 so that the liquid level of the hygroscopic liquid L in the liquid tank 37 is constant.

  A water supply pipe 40 is connected to the liquid tank 37, and tap water is supplied through a valve 41. The valve 41 adjusts the amount of tap water supplied to the water supply pipe 40. The processor 30 includes a control device 60 that controls opening and closing of the valve 41. A temperature sensor 61 is connected to the control device 60, and exhaust gas temperature information detected by the temperature sensor 61 is transmitted to the control device 60. The control device 60 controls the opening and closing of the valve 41 based on the temperature information received from the temperature sensor 61.

  Next, the configuration of the heat pump 20 will be described. The heat pump 21 includes a first heat exchanger 24, a second heat exchanger 25, a compressor 21, an expansion valve 22, and a refrigerant pipe 23 that connects them, and the refrigerant pipe 23 includes Is filled with refrigerant. The heat pump 20 can cause the first heat exchanger 24 to function as an evaporator or a condenser by reversing the refrigerant flow. The second heat exchanger 25 performs a process reverse to that of the first heat exchanger 24. That is, when the first heat exchanger 24 functions as an evaporator, the second heat exchanger 25 functions as a condenser, and when the first heat exchanger 24 functions as a condenser, the second heat exchanger 24 functions as a condenser. The heat exchanger 25 functions as an evaporator.

  The first heat exchanger 24 exchanges heat between the hygroscopic liquid L flowing through the pipe 18 of the processor 10 and the refrigerant, and cools the hygroscopic liquid L (in the case of an evaporator) or heats (of the condenser). If). The second heat exchanger 25 exchanges heat between the hygroscopic liquid L flowing through the first hygroscopic liquid conduit 50 and the refrigerant, and heats the hygroscopic liquid L (in the case of a condenser) or cools (evaporates). In case of a container).

  Whether the hygroscopic liquid L is heated or cooled by the first heat exchanger 24 depends on whether the processor 10 performs humidification or dehumidification. That is, when the processor 10 performs dehumidification, the first heat exchanger 24 functions as an evaporator, and the hygroscopic liquid L easily absorbs moisture in the air, thereby absorbing the hygroscopicity flowing through the pipe 18. Cool the liquid L. On the other hand, when the processor 10 performs humidification, the first heat exchanger 24 functions as a condenser to desorb moisture contained in the hygroscopic liquid L and absorb moisture to be contained in the air. The liquid property L is heated.

  Whether the hygroscopic liquid L is heated or cooled by the second heat exchanger 25 depends on whether the processor 10 is humidified or dehumidified. That is, when the processor 10 performs dehumidification, the second heat exchanger 25 is condensed in order to make it easy to desorb moisture contained in the hygroscopic liquid L and release it into the air in the regenerator 30. The hygroscopic liquid L flowing through the first hygroscopic liquid conduit 50 is heated. Conversely, when the processor 10 performs humidification, the second heat exchanger 25 is caused to function as an evaporator so that moisture in the air can be easily absorbed by the hygroscopic liquid L in the regenerator 30, and moisture absorption is performed. Cool the liquid L.

  The compressor 22 pressurizes the refrigerant to raise its saturation temperature. The expansion valve 23 decompresses the refrigerant to lower its saturation temperature. As the refrigerant circulates through the refrigerant pipe 24, the heat pumped up by one of the first heat exchanger 24 and the second heat exchanger 25 is released by the other.

  Next, operation | movement of the humidity control apparatus 1 of this Embodiment is demonstrated. In the humidity control apparatus 1 of the present embodiment, the processor 10 takes in air or outside air in the humidity control space, and passes the taken-in air through the hygroscopic liquid L, so that moisture is absorbed between the air and the hygroscopic liquid L. Send and receive, adjust the humidity of the air, exhaust the conditioned air to the humidity control space. The hygroscopic liquid L used for humidity adjustment in the processor 10 is sent to the regenerator 30, and is regenerated to the original solution concentration by the regenerator 30. Since the present invention is a useful invention when the humidity control apparatus 1 performs the dehumidification process, the operation when the humidity control apparatus 1 performs the dehumidification process will be described in detail below.

  The pump 19 sucks up the hygroscopic liquid L having a high solution concentration through the pipe 18, and the hygroscopic liquid L is supplied to the hygroscopic liquid supply unit 15. At this time, the first heat exchanger 24 functions as an evaporator and takes the heat of evaporation from the hygroscopic liquid L passing through the pipe 18 to cool the hygroscopic liquid L. The hygroscopic liquid supply unit 15 drops the hygroscopic liquid L from a plurality of nozzles. The dropped hygroscopic liquid L stays in the filler 16 temporarily.

  At the same time as the above operation, the processor 10 operates the fan 14 to take in air from the air inlet 12 and supplies the taken air to the filler 16 from below. The hygroscopic liquid L having a high concentration of the solution staying in the filler 16 and having a low temperature comes into contact with the air, and moisture in the air is absorbed by the hygroscopic liquid L to be dehumidified. The dehumidified air is exhausted from the exhaust port 13 to the dehumidifying target space by the fan 14.

  The hygroscopic liquid L that has passed through the filler 16 is collected in the liquid tank 17. The processor 10 sucks up the hygroscopic liquid L in the liquid tank 17 through the pipe 18 by the pump 19 and supplies the hygroscopic liquid L from the hygroscopic liquid supply unit 15 again. By circulating the hygroscopic liquid L placed in the liquid tank 17 in this way, it is possible to perform dehumidification using the hygroscopic liquid L efficiently.

  If the processor 10 continues the dehumidifying operation, the hygroscopic liquid L is diluted (becomes low in concentration) and hardly absorbs moisture in the air, so that the hygroscopic liquid L is regenerated by the regenerator 30. . The humidity control apparatus 1 sends a part of the hygroscopic liquid L sucked out from the liquid tank 17 of the processor 10 to the regenerator 30 through the first hygroscopic liquid conduit 50. The amount of the hygroscopic liquid L sent to the regenerator 30 is adjusted by the three-way valve 55.

  A second heat exchanger 26 of the heat pump 21 is provided in the first hygroscopic liquid conduit 50. The first heat exchanger 26 functions as a condenser, and the refrigerant flowing through the refrigerant pipe 24 releases heat of condensation to the hygroscopic liquid L flowing through the first hygroscopic liquid conduit 50 to heat the hygroscopic liquid L. To do. The heated low-concentration hygroscopic liquid L is dropped onto the filler 36 from a plurality of nozzles of the hygroscopic liquid supply unit 35. The dropped hygroscopic liquid L stays in the filler 36 temporarily.

  At the same time as the above operation, the regenerator 30 operates the fan 34 to take in the outside air and supplies the taken-in outside air to the filler 36 from below. Since the hygroscopic liquid L having a low solution concentration staying in the filler 36 comes into contact with the air, the moisture of the hygroscopic liquid L is released into the air.

  The regenerator 30 collects the hygroscopic liquid L that has passed through the filler 36 in the liquid tank 37. The regenerator 30 sucks up part of the hygroscopic liquid L that has entered the liquid tank 37 through the first hygroscopic liquid conduit 50 by the pump 52. The hygroscopic liquid L sucked up from the liquid tank 37 through the first hygroscopic liquid conduit 50 is dropped again from the hygroscopic liquid supply unit 35 onto the filler 36. As described above, the hygroscopic liquid L circulates between the filler 36 and the liquid tank 37, so that the concentration of the hygroscopic liquid L gradually increases.

  The hygroscopic liquid L in the liquid tank 37 subjected to the regeneration process returns to the processing machine 10 through the second hygroscopic liquid pipe 51. The hygroscopic liquid L undergoes heat exchange with the hygroscopic liquid L toward the regenerator 30 by the heat exchanger 54 on the way back to the processor 10, and the temperature of the hygroscopic liquid L decreases.

  Next, the operation of the heat pump 20 will be described. When the processor 10 performs the dehumidifying process, as described above, the first heat exchanger 24 functions as an evaporator, and the second heat exchanger 25 functions as a condenser. The refrigerant that has been decompressed by the expansion valve 22 and has a low saturation temperature is sent to a first heat exchanger 24 as an evaporator. In the first heat exchanger 24, the refrigerant absorbs heat from the hygroscopic liquid L flowing through the pipe 18 and evaporates, thereby cooling the hygroscopic liquid L. The evaporated refrigerant is sent to the compressor 21 and is pressurized, so that the saturation temperature thereof becomes high. The refrigerant having a higher saturation temperature is sent to the second heat exchanger 25 as a condenser. In the second heat exchanger 25, the refrigerant liquefies by releasing heat to the hygroscopic liquid L flowing through the first hygroscopic liquid conduit 50. The liquefied high-pressure refrigerant returns to the expansion valve 22 and is depressurized. This cycle realizes an operation in which the first heat exchanger 24 draws heat from the hygroscopic liquid L used for dehumidification and releases the heat to the hygroscopic liquid L to be regenerated in the second heat exchanger 25. Is done.

  Here, how much the expansion valve 22 depressurizes the refrigerant depends on how much heat must be absorbed from the hygroscopic liquid L flowing through the pipe 18 in the first heat exchanger 24 which is an evaporator. . That is, the higher the temperature of the hygroscopic liquid L flowing to the first heat exchanger 24 and the lower the required temperature of the hygroscopic liquid L to be supplied to the processor 10, the lower the temperature required for the refrigerant by the expansion valve 22. On the other hand, a large pressure drop must be made. On the other hand, the compressor 21 applies pressure to the refrigerant so that the pressure reduced by the expansion valve 22 is returned to the original pressure. Therefore, the amount of heat that can be released by the second heat exchanger 25 depends on the amount of heat absorbed by the first heat exchanger 24.

  Next, the operation of the control device 60 will be described. As described above, the amount of heat released to the hygroscopic liquid L by the second heat exchanger 25 depends on the amount of heat pumped up from the hygroscopic liquid L by the first heat exchanger 24. The hygroscopic liquid L is excessively heated in the heat exchanger 25. Then, the liquid tank 37 is sucked up by the pump 52 through the first hygroscopic liquid conduit 50, passes through the second heat exchanger 25, is dropped from the hygroscopic liquid supply unit 35, passes through the filler 36, and passes through the liquid tank 37. The temperature of the hygroscopic liquid L rises more and more due to the circulation of the recovered liquid, and the hygroscopic liquid L is excessively concentrated.

  In such a case, the control device 60 opens the valve 42 to supply tap water to the hygroscopic liquid L in the liquid tank 37 from the water supply pipe 41. This suppresses excessive concentration of the hygroscopic liquid L. Specifically, when the temperature of the absorbent liquid L in the regenerator 30 increases, the regeneration proceeds and the concentration of the hygroscopic liquid L proceeds, and at the same time, the temperature of the air used for the regeneration of the hygroscopic liquid L also increases. To do. Therefore, the degree of concentration of the hygroscopic liquid L in the regenerator 30 can be detected by detecting the temperature of the air (exhaust gas) used for regeneration by the temperature sensor 61. Therefore, when the temperature detected by the temperature sensor 61 exceeds a predetermined threshold, the control device 60 determines that the degree of concentration of the hygroscopic liquid L exceeds the predetermined threshold, and opens the valve 42 to supply tap water. Start. Further, when the temperature detected by the temperature sensor 61 falls below a predetermined threshold, the control device 60 closes the valve 42 and stops water supply. The threshold value of the temperature can be set to a temperature that is 10 degrees higher than the temperature of the outside air, for example.

  Conventionally, when the humidifying process is performed in the processor 10, the regeneration process in the regenerator 30 (the process of increasing the saturated water vapor pressure of the hygroscopic liquid by absorbing moisture into the hygroscopic liquid) There was a technique of supplying tap water to the hygroscopic liquid of the machine 30. However, the above embodiment is an idea completely different from this prior art, and tap water is supplied to the hygroscopic liquid L in order to suppress excessive concentration of the hygroscopic liquid in the regenerator in the dehumidifying process.

  As described above, when the processor 10 performs the dehumidifying process, the humidity control apparatus 1 of the present embodiment opens the valve 41 by the control device 60 when the temperature of the exhaust gas in the regenerator 30 becomes equal to or higher than a predetermined threshold. Since tap water is supplied to the hygroscopic liquid L in the liquid tank 37, excessive concentration of the hygroscopic liquid L due to excessive heating by the second heat exchanger 25 of the heat pump 20 can be suppressed. .

(Second Embodiment)
In the first embodiment, in order to detect the degree of concentration of the hygroscopic liquid L in the regenerator 30, a temperature sensor 61 is provided in the vicinity of the exhaust port 33 of the regenerator 30 to detect the exhaust temperature of the regenerator 30. did. The opening / closing of the valve 41 was controlled using the exhaust temperature as a parameter indicating the degree of concentration of the hygroscopic liquid. However, the means for detecting the degree of concentration of the hygroscopic liquid in the regenerator 30 is not limited to this.

  FIG. 2 is a diagram illustrating the configuration of the regenerator according to the second embodiment. About the element similar to 1st Embodiment, the detailed description is abbreviate | omitted using the same code | symbol. A temperature sensor 62 is provided in the first hygroscopic liquid conduit 50 of the regenerator 71 of the present embodiment. The temperature sensor 62 detects the temperature of the hygroscopic liquid flowing through the first hygroscopic liquid conduit 50 after passing through the second heat exchanger 25. The temperature sensor 62 is connected to the control device 60 and transmits information on the detected temperature to the control device 60.

  When an excessive amount of heat is released to the hygroscopic liquid L by the second heat exchanger 25, the temperature of the hygroscopic liquid L rises excessively. Such a high-temperature hygroscopic liquid L is dropped on the filler 36 and collected in the liquid tank 37, and then sucked up by the pump 52 again and passes through the second heat exchanger 25, whereby the temperature of the hygroscopic liquid L is increased. Goes up further. When the temperature of the hygroscopic liquid L rises, moisture easily desorbs from the hygroscopic liquid L. By such circulation, the hygroscopic liquid L in the regenerator 30 is excessively concentrated. Therefore, the control device 60 receives temperature information from the temperature sensor 62, and when the temperature of the hygroscopic liquid L exceeds a predetermined threshold, opens the valve 41 and supplies tap water to the liquid tank 37. Thereby, excessive concentration of the hygroscopic liquid L in the regenerator 30 can be suppressed. Note that when the temperature detected by the temperature sensor 62 falls below the threshold, the control device 60 closes the valve 41 and stops water supply. The threshold value of the temperature can be set to a temperature that is 10 degrees higher than the temperature of the outside air, for example.

  Note that the temperature sensor 62 that detects the temperature of the hygroscopic liquid L may be provided at another location in the regenerator. For example, the temperature sensor 62 may be provided in the liquid tank 37 to detect the temperature of the hygroscopic liquid L in the liquid tank 37.

(Third embodiment)
FIG. 3 is a diagram illustrating a configuration of a regenerator according to the third embodiment. A concentration sensor 63 is provided in the liquid tank 37 of the regenerator 72. The concentration sensor 63 detects the concentration of the hygroscopic liquid L regenerated through the filler 36, thereby detecting the degree of concentration of the hygroscopic liquid in the regenerator 72.

  The concentration sensor 63 is connected to the control device 60 and transmits information on the detected concentration to the control device 60. The control device 60 receives the concentration information from the concentration sensor 63 and opens the valve 41 to supply tap water to the liquid tank 37 when the concentration exceeds a predetermined threshold. Thereby, excessive concentration of the hygroscopic liquid in the regenerator 30 can be suppressed. In addition, when the density | concentration detected by the density | concentration sensor 63 becomes below a threshold value, the control apparatus 60 will close the valve 41 and will stop water supply. The threshold value of the concentration can be set to 35% by weight, for example.

  Note that the concentration sensor 63 for detecting the concentration of the hygroscopic liquid L may be provided at another location in the regenerator. For example, the concentration sensor 63 may be provided in the first hygroscopic liquid conduit 50 to detect the concentration of the hygroscopic liquid L flowing through the first hygroscopic liquid conduit 50.

(Modification)
In the dehumidifying apparatus of the first to third embodiments, the heat pump 20 is used to exchange heat between the refrigerant and the hygroscopic liquid L, and the hygroscopic liquid L is cooled or heated. Is not limited to this. For example, when the hygroscopic liquid L to be regenerated is heated using the exhaust heat from the exhaust heat source, the problem of excessive concentration of the hygroscopic liquid L due to excessive heating occurs as in the above embodiment. obtain. Therefore, the first to third embodiments can also be applied to a dehumidifying device that heats the hygroscopic liquid to be regenerated using the exhaust heat from a predetermined exhaust heat source during dehumidification.

  Moreover, the humidity control apparatus may include a heater for heating the hygroscopic liquid supplied to the regenerator. When it is not sufficient to heat the hygroscopic liquid to be regenerated with a heat pump or a waste heat source, the heater can be used to assist heating. In this case, when the control device 60 determines that the degree of concentration of the hygroscopic liquid exceeds a predetermined threshold, the heater is stopped and the tap water is supplied.

  Furthermore, in the above embodiment, tap water is supplied to the hygroscopic liquid to suppress the concentration of the hygroscopic liquid, but water from other water sources such as ground water may be supplied instead of the tap water. In particular, when groundwater is used, the temperature is generally lower than that of tap water, which is effective in suppressing the concentration of hygroscopic liquid.

  Further, in the above-described embodiment, filling is performed by dropping a hygroscopic liquid cooled or heated by the heat pump from the hygroscopic liquid supply unit to the filler in the processor and the regenerator using the filler and the heat pump. Although the hygroscopic liquid and the air are brought into contact with each other with the material, the present invention is not limited to this configuration. Gas-liquid contact with air while cooling or heating the hygroscopic liquid dropped from the hygroscopic liquid supply unit using a heat exchange coil consisting of a heat exchange filter instead of a filler inside the processor and regenerator May be performed. In this case, the heat exchange coil can be configured as part of a heat pump. Further, in the above-described embodiment using the filler, a counter gas-liquid contact method is adopted in which air is introduced from below the filler and discharged from above the filler, but a heat exchange coil is used. In this case, a cross gas-liquid contact configuration in which air is introduced from the side of the heat exchange coil and discharged from the opposite side may be employed.

  In the above embodiment, the control device 60 performs control to open or close the valve 41 according to the degree of concentration of the hygroscopic liquid, but the control device 60 determines the degree of concentration of the hygroscopic liquid. The opening amount of the valve may be adjusted accordingly.

  In the first to third embodiments, the means for detecting the degree of concentration of the hygroscopic liquid are respectively a temperature sensor for detecting the exhaust temperature, a temperature sensor for detecting the temperature of the hygroscopic liquid, Although described as a concentration sensor for detecting the humidity of the hygroscopic liquid, these temperature sensor and concentration sensor may be combined.

  According to the present invention, in the dehumidification process, the detection means detects the degree of concentration of the hygroscopic liquid, and when the degree of concentration exceeds a predetermined value, the hygroscopic liquid is replenished with water. It has the effect of suppressing excessive concentration, and is useful as a dehumidifying device that performs dehumidification using a hygroscopic liquid.

DESCRIPTION OF SYMBOLS 1 Humidity control apparatus 10 Processing machine 11 Housing | casing 12 Intake port 13 Exhaust port 14 Fan 15 Hygroscopic liquid supply part 16 Filler 17 Liquid tank 18 Pipe 19 Pump 20 Heat pump 21 Compressor 22 Expansion valve 23 Refrigerant pipe 24 1st heat Exchanger 25 Second heat exchanger 30, 71, 72 Regenerator 31 Housing 32 Intake port 33 Exhaust port 34 Fan 35 Hygroscopic liquid supply part 36 Filler 37 Liquid tank 40 Water supply pipe 41 Valve 50 First hygroscopic liquid Line 51 Second hygroscopic liquid line 52 Pump 53 Valve 54 Heat exchanger 55 Three-way valve 60 Controller 62 Heat transfer pipe 61, 62 Temperature sensor 63 Concentration sensor

Claims (8)

A dehumidifying device that dehumidifies air by absorbing moisture in the air into a hygroscopic liquid,
A processing machine for performing dehumidification processing;
A regenerator that regenerates the hygroscopic liquid used in the dehumidification treatment;
A heater for heating the hygroscopic liquid supplied to the regenerator;
Detection means for detecting the degree of concentration of the hygroscopic liquid in the regenerator;
Water supply means for supplying water to the hygroscopic liquid in the regenerator,
When the dehumidifying process is performed by the processor, the hygroscopic liquid used for the dehumidifying process is regenerated by the regenerator, and the hygroscopic liquid supplied to the regenerator is heated by the heater The control means for controlling the water supply means to replenish water to the hygroscopic liquid in the regenerator when the degree of concentration detected by the detection means exceeds a predetermined value;
A dehumidifying device. The detection means is a temperature sensor that detects the temperature of exhaust from the regenerator,
The dehumidifying device according to claim 1, wherein the control means controls the water supply means to replenish water to the hygroscopic liquid in the regenerator when the temperature detected by the temperature sensor exceeds a predetermined value. The detection means is a temperature sensor that detects the temperature of a hygroscopic liquid heated by a heater and supplied to the regenerator, or a temperature of the hygroscopic liquid in the regenerator,
The dehumidifying device according to claim 1, wherein the control means controls the water supply means to replenish water to the hygroscopic liquid in the regenerator when the temperature detected by the temperature sensor exceeds a predetermined value. The detection means is a concentration sensor that detects the concentration of the hygroscopic liquid supplied to the regenerator or the concentration of the hygroscopic liquid in the regenerator,
The dehumidifying device according to claim 1, wherein the control unit controls the water supply unit to replenish water to the hygroscopic liquid in the regenerator when the concentration detected by the temperature concentration sensor exceeds a predetermined value. .   The dehumidifier according to any one of claims 1 to 4, wherein the heater is a part of a heat pump, and the heat pump includes a cooler that cools a hygroscopic liquid supplied to the processor. The dehumidifier according to claim 1, wherein the heater heats the hygroscopic liquid using waste heat . A regenerator that regenerates the hygroscopic liquid used in the dehumidification process,
A heater for heating the hygroscopic liquid used in the dehumidification treatment ;
Detection means for detecting the degree of concentration of the hygroscopic liquid heated by the heater ;
Water supply means for supplying water to the hygroscopic liquid;
In the case where the heater is heating the hygroscopic liquid used in the dehumidifying treatment , the hygroscopic liquid is replenished with water when the degree of concentration detected by the detection means exceeds a predetermined value. Control means for controlling the water supply means;
A regenerator comprising: A control method of a dehumidifying device that dehumidifies air in a dehumidifying target space by absorbing moisture in the air into a hygroscopic liquid,
A heating step for heating the hygroscopic liquid to regenerate the hygroscopic liquid utilized for dehumidification;
A detection step of detecting the degree of concentration of the hygroscopic liquid heated in the heating step ;
In case the heating of the hygroscopic liquid in the heating step, when the degree of concentration which is detected by the detecting step exceeds a predetermined value, the water supply step of supplying water to the hygroscopic liquid,
A method for controlling a dehumidifying device.