Dehumidification system

Abstract

This dehumidification system provides a mechanism that can notify the user of information regarding the dehumidification performance of the dehumidifying rotor before it reaches a state where maintenance or replacement is required. [Solution] The dehumidification system calculates the target regeneration inlet temperature, which indicates the target temperature at the entrance of the regeneration area, based on the outside air dew point temperature, the air supply inlet temperature, and the air supply inlet absolute humidity. After calculating the regeneration inlet target temperature, the dehumidification system calculates the excess energy consumption corresponding to various equipment based on the regeneration inlet target temperature while the dehumidification device is in operation. Based on the excess energy consumption, the dehumidification system generates information regarding the dehumidification performance of the dehumidification rotor and outputs it to the notification device.

Description

Technical Field

[0001] The present disclosure relates to a dehumidification system that supplies low dew point air into a room.

Background Art

[0002] Patent Document 1 discloses a dehumidification device that uses a dehumidification rotor to perform dehumidification operation according to the load fluctuation of an air-conditioned room (indoors). In the dehumidification device, when the performance of the dehumidification rotor deteriorates due to aging or the like, the regeneration air volume is increased or the heating temperature of a heater (regeneration heater) is raised according to the deterioration of the dehumidification performance.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] By the way, even if the deterioration of the dehumidification performance of the dehumidification device (dehumidification rotor) progresses, it is difficult for the user to grasp the deterioration of the dehumidification performance. For this reason, when the user notices the performance deterioration for the first time after it becomes necessary to perform maintenance or replacement, there is a possibility that the user cannot respond immediately due to restrictions such as the work plan indoors.

[0005] One object of the present disclosure is to provide a dehumidification system that can notify the user of information regarding the dehumidification performance before the dehumidification performance of the dehumidification rotor reaches a state where maintenance or replacement is required.

Means for Solving the Problems

[0006] The first aspect of this disclosure relates to a dehumidification system for supplying low-dew-point air into a room. The dehumidification system includes a dehumidifying rotor having an air supply area provided in a first duct connected to the room and adsorbing moisture contained in a mixed air including outside air and discharging dehumidified air to the first duct, and a regeneration area provided in a second duct connected to an exhaust port and discharging humid air containing the adsorbed moisture to the second duct; a regeneration heater provided at the inlet of the regeneration area in the second duct for heating the humid air; a first fan provided on the inlet side of the air supply area in the first duct for increasing or decreasing the amount of air blown in dehumidified air; and a second fan provided on the outlet side of the regeneration area in the second duct for adjusting the amount of air blown toward the exhaust port to send out high-temperature humid air heated by the regeneration heater. The dehumidification system also includes a control device connected to the dehumidifier that performs at least one of the following: temperature control for controlling the temperature of the regeneration heater, first airflow control for controlling the airflow of the first fan, and second airflow control for controlling the airflow of the second fan; and a notification device connected to the control device. The control device estimates the outside air dew point temperature based on the outside air temperature and outside air humidity obtained by measuring instruments installed in the dehumidifier, or obtains the outside air dew point temperature measured by measuring instruments installed in the dehumidifier. Based on the inlet conditions of the supply air area, the control device estimates the supply air inlet temperature, which indicates the inlet temperature of the supply air area, and the supply air inlet absolute humidity, which indicates the inlet absolute humidity of the supply air area. Based on the outside air dew point temperature, the supply air inlet temperature, and the supply air inlet absolute humidity, the control device calculates the regeneration inlet target temperature, which indicates the target temperature of the inlet of the regeneration area. Furthermore, during operation of the dehumidifier, the control device calculates at least one of the following based on the regeneration inlet target temperature: a first excess energy consumption corresponding to the regeneration heater, a second excess energy consumption corresponding to the first fan, and a third excess energy consumption corresponding to the second fan. Based on at least one of the first excess energy consumption, the second excess energy consumption, and the third excess energy consumption, the control device generates information regarding the dehumidification performance of the dehumidification rotor. The control device then outputs the information regarding the dehumidification performance to the notification device.

[0007] A second aspect of the present disclosure relates to a dehumidification system that supplies low dew point air into a room. The dehumidification system includes an air supply area provided in a first duct connected to the room, which adsorbs moisture contained in mixed air including outside air and discharges dehumidified air into the first duct, and a regeneration area provided in a second duct connected to an exhaust port, which discharges moist air containing the adsorbed moisture into the second duct. The dehumidification system further includes a dehumidification rotor having the above-mentioned air supply area and regeneration area, a regeneration heater provided at the inlet of the regeneration area in the second duct for heating the moist air, a first fan provided on the inlet side of the air supply area in the first duct for increasing or decreasing the air volume of the dehumidified air, and a second fan provided on the outlet side of the regeneration area in the second duct for adjusting the air volume to send the high-temperature moist air heated by the regeneration heater toward the exhaust port. The dehumidification system also includes a control device connected to the dehumidification device and executing at least one of temperature control for controlling the temperature of the regeneration heater, first air volume control for controlling the air volume of the first fan, and second air volume control for controlling the air volume of the second fan, and a notification device connected to the control device. The control device estimates the outside air dew point temperature based on the outside air temperature and outside air humidity acquired by a measuring instrument provided in the dehumidification device, or acquires the outside air dew point temperature measured by the measuring instrument provided in the dehumidification device. Based on the inlet conditions of the air supply area, the control device estimates the air supply inlet temperature indicating the inlet temperature of the air supply area and the air supply inlet absolute humidity indicating the inlet absolute humidity of the air supply area. Based on the outside air dew point temperature, the air supply inlet temperature, and the air supply inlet absolute humidity, the control device calculates a regeneration air volume indicating the target value of the air volume of the second fan. During the operation of the dehumidification device, the control device calculates at least one of a first excess energy consumption corresponding to the regeneration heater, a second excess energy consumption corresponding to the first fan, and a third excess energy consumption corresponding to the second fan based on the regeneration air volume. Based on at least one of the first excess energy consumption, the second excess energy consumption, and the third excess energy consumption, the control device generates information regarding the dehumidification performance of the dehumidification rotor. Then, the control device outputs the information regarding the dehumidification performance to the notification device.

Advantages of the Invention

[0008] According to this disclosure, information regarding the dehumidification performance of the dehumidifying rotor will be notified to the user before the dehumidification performance reaches a state requiring maintenance or replacement. Based on this information, the user will then be able to appropriately plan the timing of maintenance or replacement of the dehumidifying rotor. [Brief explanation of the drawing]

[0009] [Figure 1] This is an explanatory diagram showing an example configuration of a dehumidification system according to an embodiment. [Figure 2] This diagram illustrates the energy consumption of various devices in relation to the performance of the dehumidifier according to the embodiment. [Figure 3] This is a block diagram showing an example of the functional configuration of a control device according to an embodiment. [Figure 4] This is an explanatory diagram showing a calculation model for the regeneration inlet target temperature according to the embodiment. [Figure 5] This is an explanatory diagram showing an example of the result of the approximate formula for the regeneration inlet target temperature according to the embodiment. [Figure 6] This figure illustrates an example of evaluating whether or not a dehumidifying rotor has deteriorated according to the embodiment. [Figure 7] This figure illustrates an example of evaluating whether or not a dehumidifying rotor has deteriorated, according to a modified embodiment. [Modes for carrying out the invention]

[0010] A dehumidification system according to an embodiment of the present disclosure will be described with reference to the attached drawings. In addition, elements common to each figure are denoted by the same reference numerals, and redundant explanations are omitted.

[0011] 1. Example of a dehumidification system configuration Figure 1 is an explanatory diagram showing an example configuration of a dehumidification system 1 according to an embodiment. The dehumidification system 1 supplies low-dew-point air to a low-dew-point chamber 20 (also simply referred to as the room 20). The low-dew-point chamber 20 is controlled to have a dew-point temperature range of, for example, -50°C DP to -30°C DP. Examples of low-dew-point chambers 20 include dry rooms, clean rooms, etc.

[0012] The dehumidification system 1 includes a low dew point chamber 20, a dehumidifier 100, a control device 30, and a notification device 50. The dehumidifier 100 generates air to be supplied to the low dew point chamber 20. The dehumidifier 100 includes, for example, a first duct 131, a second duct 132, a dehumidifying rotor 101, a first fan 112, a second fan 124, a regenerating heater 121, a precooler 111, an aftercooler 114, and an afterheater 115.

[0013] The first duct 131 has one end connected to an outside air inlet and the other end connected to the low dew point chamber 20. The second duct 132 has one end connected to an outside air inlet and the other end connected to an exhaust port. The outside air inlet connected to the first duct 131 and the outside air inlet connected to the second duct 132 may be the same or different. The dehumidification system 1 is also provided with a third duct 133. The third duct 133 is piping for bringing return air from the low dew point chamber 20 into the dehumidifier 100 and exhausting it to an exhaust port. The third duct 133 has one end connected to the low dew point chamber 20 and the other end connected to an exhaust port and connection point a in the first duct 131. The exhaust port connected to the third duct 133 and the exhaust port connected to the second duct 132 may be the same or different.

[0014] The dehumidifying rotor 101 has a rotation mechanism that rotates in one direction and can rotate at any rotational speed. The dehumidifying rotor 101 is equipped with a power converter 102 (also simply called an inverter 102) for driving and controlling the rotation mechanism. The rotation mechanism is driven and controlled based on commands from the inverter 102. The inverter 102 is controlled by the control device 30.

[0015] The dehumidifying rotor 101 has an air supply area, a regeneration area, and a purge area. The air supply area has the function of adsorbing moisture contained in the mixed air, which includes outside air taken in from the outside air inlet via the first filter 110 and return air from the low dew point chamber 20, and discharging dehumidified air. The regeneration area has the function of discharging humid air, which includes the adsorbed moisture and outside air taken in from the outside air inlet via the second filter 120. The humid air may also include the mixed air (outside air and return air) taken in from the first duct 131. The purge area is provided between the air supply area and the regeneration area. Air supplied to the first branch duct 131A passes through the purge area. One end of the first branch duct 131A is connected to the inlet side of the air supply area in the first duct 131, and the other end is connected to the inlet side of the regeneration area in the second duct 132. The air supplied to the first branch duct 131A is the mixed air (outside air and return air) taken into the first duct 131. Therefore, the purge area adsorbs moisture contained in the mixed air flowing into the first branch duct 131A and discharges the dehumidified air toward the second duct 132.

[0016] The first fan 112 is located in the first duct 131 on the inlet side of the air supply area of ​​the dehumidifying rotor 101. It takes in outside air from the outside air port and return air from the low dew point chamber 20, and sends the resulting mixed air toward the inlet side of the air supply area. It also sends this mixed air toward the second duct 132 via the first branch duct 131A. In other words, the first fan 112 adjusts the airflow rate of the mixed air to increase or decrease the amount of dehumidified air being supplied. The first fan 112 is equipped with a power converter 113 (also simply called an inverter 113) for driving the fan. The inverter 113 is controlled by a control device 30. The control device 30 may control the airflow rate of the first fan 112 to be a fixed output, or it may control the airflow rate of the first fan 112 to be a variable output. For example, if the airflow of the first fan 112 is fixed, turning the first fan 112 ON will increase the amount of dehumidified air supplied, and turning the first fan 112 OFF will decrease the amount of dehumidified air supplied. In another example, if the airflow of the first fan 112 is variable, the amount of dehumidified air supplied can be increased or decreased by adjusting the airflow accordingly. The first fan 112 is also referred to as the "processing fan".

[0017] The second fan 124 is located in the second duct 132 on the outlet side of the regeneration area of ​​the dehumidifying rotor 101. It takes in outside air from the outside air port and sends it towards the inlet side of the regeneration area, and also exhausts hot, humid air heated by the regeneration heater 121 from the outlet side of the regeneration area towards the exhaust port. The second fan 124 is equipped with a power converter 125 (also simply called an inverter 125) for driving the fan. The inverter 125 is controlled by a control device 30. For example, the control device 30 may control the airflow of the second fan 124 to a fixed output, or it may control the airflow of the second fan 124 to a variable output. For example, if the airflow of the second fan 124 is a fixed output, turning the second fan 124 ON can increase the amount of hot, humid air discharged, and turning the second fan 124 OFF can decrease the amount of hot, humid air discharged. As another example, if the airflow of the second fan 124 is variable, it is possible to increase or decrease the discharge of hot, humid air by variably adjusting the airflow. The second fan 124 is also called a "regeneration fan." The first fan 112 and the second fan 124 are collectively referred to as "fans."

[0018] The regeneration heater 121 is located in the second duct 132 on the inlet side of the regeneration area of ​​the dehumidifying rotor 101 and heats the humid air. The regeneration heater 121 is equipped with a thyristor 122 that adjusts the heater's power. The thyristor 122 is controlled by the control device 30. The temperature of the humid air heated by the regeneration heater 121 is monitored by the control device 30. The temperature of the humid air is measured, for example, by a thermometer 123 (also referred to as thermometer T1) located in the second duct 132 on the inlet side of the regeneration area of ​​the dehumidifying rotor 101.

[0019] The precooler 111 is installed in the first duct 131 between the first filter 110 and the first fan 112. The precooler 111 cools the outside air taken in from the outside air inlet, or the mixed air containing the outside air from the outside air inlet and the return air from the low dew point chamber 20. In this case, the precooler 111 may be supplied with chilled water to cool the outside air or the mixed air. The precooler 111 is also referred to as the "cooler".

[0020] The aftercooler 114 cools the dehumidified air discharged from the dehumidifying rotor 101. This suppresses the temperature rise of the dehumidified air. In this case, the aftercooler 114 may be supplied with chilled water to cool the dehumidified air.

[0021] The afterheater 115 heats the dehumidified air cooled by the aftercooler 114. This further improves the drying effect of the dehumidified air.

[0022] The control device 30 is connected to the dehumidifier 100 and controls the dehumidifier 100 to supply low-dew-point air to the low-dew-point chamber 20. Specifically, the control device 30 acquires various information. The various pieces of information include, for example, a second dew point temperature 22 (also referred to as the second dew point temperature DP2) indicating the dew point temperature of the low dew point chamber 20 (indoor 20), a first dew point temperature 11 (also referred to as the first dew point temperature DP1) indicating the dew point temperature of the dehumidified air supplied to the low dew point chamber 20, the temperature at the inlet of the regeneration area obtained by thermometer 123 (thermometer T1), the temperature obtained by thermometer 126 (thermometer T4) located downstream of the connection point b with the first branch duct 131A in the second duct 132 and upstream of the regeneration heater 121 described later, the outside air temperature obtained by thermometer 2 (thermometer T2), the outside air humidity obtained by hygrometer 3 (hygrometer H1), the temperature at the inlet of the supply air area obtained by thermometer 4 (thermometer T3), and the humidity at the inlet of the supply air area obtained by hygrometer 5 (hygrometer H2). Hygrometers 3 and 5 may be, for example, absolute hygrometers that measure absolute humidity, or relative hygrometers that measure relative humidity. If hygrometers 3 and 5 are relative hygrometers, the control device 30 may calculate the absolute humidity based on the relative humidity measured by the relative hygrometers.

[0023] The control device 30 controls various devices based on various information. These devices include a first fan 112, a second fan 124, a regenerative heater 121, and a dehumidifying rotor 101. When adjusting the airflow of the first fan 112, the control device 30 generates airflow setting information for the first fan 112 based on various information. Based on the airflow setting information for the first fan 112, the control device 30 generates and outputs a drive control signal (e.g., frequency [Hz], PWM signal) to the inverter 113. When adjusting the airflow of the second fan 124, the control device 30 generates airflow setting information for the second fan 124 based on various information. Based on the airflow setting information for the second fan 124, the control device 30 generates and outputs a drive control signal (e.g., frequency [Hz], PWM signal) to the inverter 125. When adjusting the temperature of the regenerative heater 121, the control device 30 generates temperature setting information for the regenerative heater 121 based on various information. Based on the temperature setting information of the regenerative heater 121, the control device 30 generates and outputs a control signal for the thyristor 122. When adjusting the rotation speed of the dehumidifying rotor 101, the control device 30 generates rotation speed setting information for the dehumidifying rotor 101 based on various information. Based on the rotation speed setting information for the dehumidifying rotor 101, the control device 30 generates and outputs a drive control signal (e.g., frequency [Hz], PWM signal) for the inverter 102.

[0024] The notification device 50 is connected to the control device 30 and notifies the user of output information from the control device 30. Examples of the notification device 50 include a monitor, LED, speaker, etc. The notification device 50 may also be a device capable of communicating with the control device 30.

[0025] Here, we consider the dehumidification performance (also referred to as adsorption performance) of the dehumidifying rotor 101 when it is used for a long period of time. As shown in Figure 2, the dehumidification performance of the dehumidifying rotor 101 gradually decreases as the period of use of the dehumidifying rotor 101 increases. In this case, in order to maintain the dew point temperature of the room 20 at the set room dew point temperature (e.g., -40°C DP) that indicates the target dew point temperature of the room 20, the control device 30 controls the output of various devices (first fan 112, second fan 124, regenerative heater 121). This necessitates increasing the airflow of the fans (first fan 112, second fan 124) or raising the heating temperature of the regenerative heater 121, which may increase the energy consumption of the dehumidifying device 100 and reduce the energy efficiency of the dehumidification system 1. Therefore, it is preferable to notify the user of information regarding the dehumidification performance of the dehumidification rotor 101 (e.g., energy consumption exceeding the specified value, estimated replacement time for the dehumidification rotor 101, etc.) before the dehumidification performance of the dehumidification rotor 101 reaches a state requiring maintenance or replacement.

[0026] In this embodiment, the dehumidification system 1 (control device 30) performs at least one of the following: temperature control to control the temperature of the regeneration heater 121; first airflow control to control the airflow of the first fan 112; and second airflow control to control the airflow of the second fan 124. The control device 30 also estimates the outside air dew point temperature based on the outside air temperature and outside air humidity obtained by measuring instruments (thermometer 2, hygrometer 3) installed in the dehumidification device 100, or obtains the outside air dew point temperature measured by a measuring instrument (dew point meter) installed in the dehumidification device 100. Furthermore, the control device 30 estimates the air inlet temperature, which indicates the temperature at the inlet of the air supply area, and the air inlet absolute humidity, which indicates the absolute humidity at the inlet of the air supply area, based on the inlet conditions of the air supply area of ​​the dehumidification rotor 101. Furthermore, the control device 30 calculates the regeneration inlet target temperature, which indicates the target temperature at the inlet of the regeneration area, based on the outside air dew point temperature, the air inlet temperature, and the air inlet absolute humidity. During operation of the dehumidifier 100, the control device 30 calculates at least one of the following based on the regeneration inlet target temperature: a first excess energy consumption corresponding to the regeneration heater 121, a second excess energy consumption corresponding to the first fan 112, and a third excess energy consumption corresponding to the second fan 124. Based on at least one of the first excess energy consumption, the second excess energy consumption, and the third excess energy consumption, the control device 30 generates information regarding the dehumidification performance of the dehumidification rotor 101. The control device 30 then outputs this information regarding dehumidification performance to the notification device 50.

[0027] This ensures that the user is notified of the dehumidification performance of the dehumidifying rotor 101 before it reaches a state requiring maintenance or replacement. Based on this information, the user can then appropriately plan the timing of maintenance or replacement of the dehumidifying rotor 101. Details of the various controls performed by the control device 30 will be described later.

[0028] 2. Example of Control Device Functional Configuration Figure 3 is a block diagram showing an example of the functional configuration of a control device 30 according to an embodiment. The control device 30 has hardware that realizes various functions. The hardware includes, for example, a memory device (not shown) and a processor (not shown) that executes programs stored in the memory device. The processor may be, for example, a CPU capable of arithmetic processing, or a PLC (Programmable Logic Controller) capable of sequence control.

[0029] The control device 30 (processor) performs various controls. Specifically, the various controls performed by the processor include an outside air dew point temperature estimation unit 31, an air supply inlet temperature and humidity estimation unit 32, a regeneration inlet target temperature calculation unit 33, an equipment output control unit 34, an excess energy consumption calculation unit 35, and a dehumidification performance related information generation unit 36.

[0030] The outside air dew point temperature estimation unit 31 estimates the outside air dew point temperature based on the outside air temperature and humidity information (outside air temperature and outside air humidity) obtained by the thermometer 2 and hygrometer 3 installed near the outside air outlet inside the dehumidifier 100. The outside air dew point temperature may be calculated, for example, based on a known formula for calculating dew point temperature, or it may be calculated using a psychrometric chart in which the horizontal axis represents the dry-bulb temperature and the vertical axis represents the absolute humidity.

[0031] The air intake temperature and humidity estimation unit 32 estimates the air intake temperature, which indicates the temperature at the entrance of the air intake area, and the air intake absolute humidity, which indicates the absolute humidity at the entrance of the air intake area, based on the inlet conditions (also referred to as air intake conditions) of the air intake area of ​​the dehumidifying rotor 101.

[0032] The air intake conditions can vary. For example, the air intake conditions may be temperature and humidity information obtained by a thermometer 4 and a hygrometer 5 installed at the inlet of the air intake area (first condition), information on the mixing ratio indicating the proportion of mixed air obtained by mixing outside air and return air from inside the low dew point chamber 20 (second condition), or information on the outlet temperature of a precooler 111 installed at the inlet of the air intake area to cool the mixed air (third condition). In other words, the air intake conditions include at least one of the first, second, and third conditions. The outlet temperature of the precooler 111 may be the same as the temperature obtained by the thermometer 4, or it may be a temperature obtained by a thermometer not shown.

[0033] The regeneration inlet target temperature calculation unit 33 calculates the regeneration inlet target temperature, which indicates the target temperature at the regeneration area inlet of the dehumidifying rotor 101, based on the outside air dew point temperature estimated by the outside air dew point temperature estimation unit 31 and the supply air inlet temperature and supply air inlet absolute humidity estimated by the supply air inlet temperature and humidity estimation unit 32. Details of the regeneration inlet target temperature calculation unit 33 will be described later.

[0034] The equipment output control unit 34 controls the output of various devices. These devices include a regenerative heater 121, a first fan 112, and a second fan 124. The equipment output control unit 34 performs at least one of the following: temperature control to control the temperature of the regenerative heater 121, first airflow control to control the airflow of the first fan 112, and second airflow control to control the airflow of the second fan 124.

[0035] For example, the equipment output control unit 34 operates various devices so that the first dew point temperature 11 approaches the set supply air dew point temperature. In this case, the equipment output control unit 34 controls at least one of the following so that the first dew point temperature 11 approaches the set supply air dew point temperature: the temperature of the regenerative heater 121, i.e., the phase [%] of the thyristor 122; the airflow of the first fan 112, i.e., the output value [%] of the inverter 113; and the airflow of the second fan 124, i.e., the output value [%] of the inverter 125. When controlling the temperature of the regenerative heater 121, i.e., the phase [%] of the thyristor 122, the equipment output control unit 34 generates and outputs a control signal for the thyristor 122. When controlling the airflow of the first fan 112, i.e., the output value [%] of the inverter 113, the equipment output control unit 34 generates and outputs a control signal for the inverter 113. When controlling the airflow of the second fan 124, that is, the output value [%] of the inverter 125, the equipment output control unit 34 generates and outputs a control signal to the inverter 125. The set supply air dew point temperature may be set as a fixed value or as a variable value. If the set supply air dew point temperature is set as a variable value, it may be set to change linearly or in steps.

[0036] As another example, the equipment output control unit 34 may operate various devices so that the second dew point temperature 22 approaches the set room dew point temperature. In this case, the equipment output control unit 34 controls at least one of the following: the temperature of the regenerative heater 121, the airflow of the first fan 112, and the airflow of the second fan 124, so that the second dew point temperature 22 approaches the set room dew point temperature. Examples of controlling various devices are as described above.

[0037] The excess energy consumption calculation unit 35 calculates the amount of energy consumed by various devices that exceeds a specified value (reference performance value A, described later) during the operation of the dehumidifier 100, based on the regeneration inlet target temperature calculated by the regeneration inlet target temperature calculation unit 33, the temperature obtained by the thermometer 123, and the temperature obtained by the thermometer 126. The excess energy consumption includes at least one of the following: a first excess energy consumption corresponding to the regeneration heater 121, a second excess energy consumption corresponding to the first fan 112, and a third excess energy consumption corresponding to the second fan 124. Details of the calculation example of excess energy consumption will be described later.

[0038] The dehumidification performance-related information generation unit 36 ​​generates information regarding the dehumidification performance of the dehumidifying rotor 101 based on at least one of the first excess energy consumption, the second excess energy consumption, and the third excess energy consumption. Furthermore, the dehumidification performance-related information generation unit 36 ​​notifies the user of the information regarding the dehumidification performance of the dehumidifying rotor 101 via the notification device 50. The information regarding dehumidification performance may be configured to be notified to the user via the notification device 50 from the control device 30 after a predetermined period of use of the dehumidifying device 100 has elapsed. Details of the dehumidification performance-related information generation unit 36 ​​will be described later.

[0039] 3. Specific example of the regeneration inlet target temperature calculation unit The regeneration inlet target temperature calculation unit 33 calculates the regeneration inlet target temperature using a predetermined calculation formula. The calculation formula for the regeneration inlet target temperature is, for example, expressed by the following formula (1). H This is the regeneration inlet target temperature, and the regeneration inlet target temperature T H The unit is expressed in [℃]. do This is the outside air dew point temperature, and the outside air dew point temperature T do The unit is expressed as [℃DP]. i This is the air intake temperature, and the air intake temperature T i The unit is expressed in [℃]. i This is the absolute humidity at the air intake, and the absolute humidity at the air intake x iThe unit of ijk A ijk is an approximation coefficient, and the approximation coefficient A ijk is a coefficient value consisting of (l + 1) × (m + 1) × (n + 1) terms. Incidentally, the coefficient values of each term of the approximation coefficient A

[0040]

Number

[0041] Here, consider the case where l and m are 1 and n is 3. In this case, the approximation coefficient A ijk is a coefficient value consisting of 16 terms (A000, A001, A002, A003, A010, A011, A012, A013, A100, A101, A102, A103, A110, A111, A112, A113). Also, Equation (1) is an approximate equation approximated based on a linear function of the outside air dew point temperature T do and a linear function of the supply air inlet temperature T i and a cubic function of the supply air inlet absolute humidity x i . Incidentally, the approximate value of the regeneration inlet target temperature T H calculated by Equation (1) is equal to, for example, the calculated value of the regeneration inlet target temperature T H calculated based on a calculation model.

[0042] The calculation model is configured to estimate the changes in the temperature and humidity at the outlet of the supply air area based on the moisture content adsorbed by the adsorbent of the dehumidifying rotor 101, for example, based on the regeneration inlet absolute humidity indicating the inlet absolute humidity of the regeneration area, the supply air inlet temperature, and the supply air inlet absolute humidity. More specifically, as shown in FIG. 4, based on a minute area (radius r, angle Δθ, width ΔZ) when the dehumidifying rotor 101 is represented in a cylindrical coordinate system, the calculation model is configured to calculate the humidity change and the temperature change for each minute area using a predetermined equation. The predetermined equation is, for example, an equation representing the moisture balance and the heat balance. By using this calculation model, the regeneration inlet target temperature T HThis can be calculated. The absolute humidity at the regeneration inlet can be calculated, for example, by plotting the outside conditions (outside temperature, relative humidity) on a psychrometric chart.

[0043] Figure 5 shows the target regeneration inlet temperature T according to the embodiment. H This is an explanatory diagram showing an example of the result of the approximation formula. As shown in Figure 5, the regeneration inlet target temperature T calculated by formula (1) H The approximate value is the regeneration inlet target temperature T calculated based on the calculation model. H Since this is equal to the calculated value, using equation (1), the regeneration inlet target temperature T H This can be approximated with high accuracy. In the example shown in Figure 5, the target temperature T of the regeneration inlet is H It is set to 120℃.

[0044] 4. Example of calculating excess energy consumption The formula for calculating excess energy consumption Pt is, for example, expressed by the following equation (2). Excess energy consumption Pt is obtained by dividing the first variable Δ1 by the second variable Δ2. Here, an example is shown using the first excess energy consumption as the excess energy consumption Pt.

[0045]

number

[0046] The first variable Δ1 and the second variable Δ2 each represent the temperature rise downstream of the connection point b with the first branch duct 131A in the second duct 132. The first variable Δ1 is expressed, for example, by equation (3) below, and the second variable Δ2 is expressed, for example, by equation (4) below. The first variable Δ1 is the regeneration inlet target temperature T H It is expressed as the difference between the measured value and the temperature measured by thermometer 126 (thermometer T4). Regeneration inlet target temperature T H The measured value indicates, for example, the inlet temperature of the regeneration area of ​​the dehumidifying rotor 101 in the second duct 132. In other words, the first variable Δ1 indicates the temperature rise required for the regeneration of the dehumidifying rotor 101. The second variable Δ2 is the target regeneration inlet temperature T HThis is represented by the difference between the calculated value and the temperature measured by thermometer 126 (thermometer T4). In other words, the second variable Δ2 represents the temperature rise required for the regeneration of the dehumidifying rotor 101, calculated using the calculation model. Regeneration inlet target temperature T H The calculated value can be obtained using equation (1) above.

[0047]

number

[0048] Here, the target regeneration inlet temperature T required for the regeneration of the dehumidifying rotor 101 is H Let's consider the energy consumption P1. The formula for calculating the energy consumption P1 is, for example, given by equation (5) below. In this case, the energy consumption P1 is proportional to the first variable Δ1. Therefore, as the performance of the dehumidifying rotor 101 deteriorates, the first variable Δ1 increases, and consequently, the energy consumption P1 also increases. Note that c represents specific heat [kJ / kg·℃] and ρ represents air density [kg / m³]. 3 ] indicates the airflow rate [m 3 This indicates [...].

[0049]

number

[0050] For example, if the excess energy consumption Pt is defined as the value obtained by subtracting the second variable Δ2 from the first variable Δ1, the evaluation results will vary greatly depending on the season. Specifically, in summer, the energy consumption P1 required to regenerate the dehumidifying rotor 101 increases, and consequently, the temperature rise required to regenerate the dehumidifying rotor 101 also increases. On the other hand, in winter, the energy consumption P1 decreases, and the temperature rise required to regenerate the dehumidifying rotor 101 also decreases.

[0051] Thus, defining excess energy consumption Pt as "first variable Δ1 - second variable Δ2" makes it highly susceptible to seasonal influences, making it impossible to accurately evaluate the performance degradation of the dehumidifying rotor 101. On the other hand, by defining excess energy consumption Pt as the value obtained by dividing the first variable Δ1 by the second variable Δ2, as shown in equation (2) above, this value is effectively normalized to 1. This reduces the impact of seasonal variations, making it possible to stably and appropriately evaluate the performance of the dehumidifying rotor 101 throughout the year.

[0052] 5. Specific Examples of the Dehumidification Performance Related Information Generation Unit Figure 6 is a diagram illustrating an example of evaluating whether or not the dehumidifying rotor 101 has deteriorated according to the embodiment. Specifically, Figure 6 shows an example of evaluating whether or not the dehumidifying rotor 101 has deteriorated based on the excess energy consumption Pt (first excess energy consumption). In this case, it is assumed that at least the first excess energy consumption is calculated during the operation of the dehumidifying device 100.

[0053] Here, we consider the relationship between the service life of the dehumidifying rotor 101 and the excess energy consumption Pt (first excess energy consumption). As shown in Figure 6, when the dehumidifying rotor 101 is in good condition and has not deteriorated, the first variable Δ1 and the second variable Δ2 are equal, and the excess energy consumption Pt is close to 1. On the other hand, when the deterioration of the dehumidifying rotor 101 progresses, the second variable Δ2 does not change because it is a calculated value, but the first variable Δ1 changes as the dehumidifying rotor 101 deteriorates because it is a measured value. As a result, the discrepancy between the first variable Δ1 and the second variable Δ2 increases, and the absolute value of the excess energy consumption Pt deviates more and more from 1. Therefore, the standard performance value A is used as a criterion for evaluating whether or not the dehumidifying rotor 101 has deteriorated based on the excess energy consumption Pt.

[0054] The reference performance value A represents the performance value of the dehumidifying rotor 101 when it is in good condition and has not deteriorated. The reference performance value A represents, for example, the initial value of the excess energy consumption Pt. The initial value of the excess energy consumption Pt is obtained, for example, by dividing the first variable Δ1 when the dehumidifying rotor 101 is in its initial state by the second variable Δ2, and is a value close to 1. In the example shown in Figure 6, the reference performance value A is set to 1. By setting the reference performance value A to the initial value of the excess energy consumption Pt, it becomes possible to appropriately evaluate whether or not the dehumidifying rotor 101 has deteriorated, regardless of the differences between individual dehumidifying rotors 101. Furthermore, by setting the reference performance value A to 1, the control configuration can be simplified. Information regarding the reference performance value A is stored, for example, in a memory device (not shown).

[0055] Let's consider the case where the excess energy consumption falls within a predetermined range α from the standard performance value A. The predetermined range α is, for example, the range in which the set temperature of the regenerative heater 121 is allowed to deviate from the standard performance value A. If the excess energy consumption falls within the predetermined range α from the standard performance value A, that is, if the difference obtained by subtracting the standard performance value A from the excess energy consumption Pt (first variable Δ1 / second variable Δ2) falls within the predetermined range α, the dehumidification performance-related information generation unit 36 ​​determines that the dehumidification rotor 101 is not in a deteriorated state, or that the deterioration of the dehumidification rotor 101 is progressing but not serious. In this case, the dehumidification performance-related information generation unit 36 ​​may notify the user via the notification device 50 that the dehumidification rotor 101 is not in a deteriorated state, or it may be configured not to notify the user of such information. Note that the information notified to the user is not limited to information regarding the deterioration state of the dehumidification rotor 101, but may also be information regarding the excess energy consumption. This ensures that the user is notified of the dehumidification performance of the dehumidifying rotor 101 before it reaches a state requiring maintenance or replacement. Based on this information, the user can then appropriately plan the timing of maintenance or replacement of the dehumidifying rotor 101.

[0056] On the other hand, if the excess energy consumption Pt is outside a predetermined range α from the standard performance value A, that is, if the difference value obtained by subtracting the standard performance value A from the excess energy consumption Pt (first variable Δ1 / second variable Δ2) is outside a predetermined range α, the dehumidification performance-related information generation unit 36 ​​determines that the dehumidification rotor 101 is in a deteriorated state. In this case, the dehumidification performance-related information generation unit 36 ​​notifies the user, for example, via the notification device 50, of an alarm indicating that the dehumidification rotor 101 is in a deteriorated state. The notification device 50 may be configured so that the user can easily notice the alarm indicating the deteriorated state of the dehumidification rotor 101. For example, the notification device 50 may be configured to display the status of the excess energy consumption Pt, and if the excess energy consumption Pt falls outside a predetermined range α from the standard performance value A, the status of the excess energy consumption Pt may be highlighted or an alarm sound may be output.

[0057] Furthermore, even if the difference value obtained by subtracting the standard performance value A from the excess energy consumption Pt (first variable Δ1 / second variable Δ2) falls within a predetermined range α, if the difference value is greater than or equal to a threshold, the dehumidification performance-related information generation unit 36 ​​may notify the user that the degree of deterioration of the dehumidification rotor 101 exceeds the standard value.

[0058] Furthermore, the excess energy consumption Pt increases as the usage period of the dehumidifying rotor 101 lengthens and is expressed as an accumulated value from the initial state. An increase in excess energy consumption Pt means that the performance of the dehumidifying rotor 101 has deteriorated by that amount, and in this case, the amount of electricity used (i.e., energy cost) also increases along with the increase in excess energy consumption Pt. Therefore, the dehumidification performance-related information generation unit 36 ​​may be configured to determine the increase in energy consumption and the increase in electricity used due to the deterioration of the performance of the dehumidifying rotor 101 based on the excess energy consumption Pt.

[0059] 6. Variations 6-1. First variation The regeneration inlet target temperature calculation unit 33 described above calculates the regeneration inlet target temperature T HThe above calculation is performed, but is not limited to this. For example, the regeneration inlet target temperature calculation unit 33 may calculate the regeneration airflow rate Q, which indicates the target value of the airflow rate of the second fan 124 (regeneration fan). In this case, the regeneration airflow rate Q of the second fan 124 is calculated, for example, based on the following equation (6). Equation (6) is the same calculation formula as equation (1) described above, so its explanation is omitted here. The unit of the regeneration airflow rate Q is expressed in [m3 / h]. In airflow control using the second fan 124, the airflow rate sent towards the exhaust port is adjusted so as to increase or decrease the amount of high-temperature, high-humidity air heated by the regeneration heater 121. The airflow rate of the first fan 112 may also be calculated based on equation (6). In airflow control using the first fan 112, the airflow rate of the mixed air is adjusted so as to increase or decrease the amount of dehumidified air supplied.

[0060]

number

[0061] The following describes the dehumidification performance-related information generation unit 36 ​​used when calculating the regenerated airflow rate Q.

[0062] Figure 7 is a diagram illustrating an example of evaluating whether or not the dehumidifying rotor 101 has deteriorated, according to a modified embodiment. Figure 7 shows an example of evaluating whether or not the dehumidifying rotor 101 has deteriorated based on excess energy consumption Pa. Here, an example is shown in which the third excess energy consumption is used as the excess energy consumption Pa. In this case, it is assumed that at least the third excess energy consumption is calculated during the operation of the dehumidifying device 100.

[0063] The dehumidification performance-related information generation unit 36 ​​evaluates whether the dehumidification rotor 101 has deteriorated, for example, based on the excess energy consumption Pa (third excess energy consumption). The formula for calculating the excess energy consumption Pa is, for example, expressed by the following formula (7). The excess energy consumption Pa is obtained by dividing the third variable Δ3 by the fourth variable Δ4.

[0064]

number

[0065] The third variable Δ3 and the fourth variable Δ4 each represent the inlet airflow rate (regeneration airflow rate Q) of the regeneration area. The third variable Δ3 is expressed, for example, by equation (8) below, and the fourth variable Δ4 is ​​expressed, for example, by equation (9) below. Specifically, the third variable Δ3 is the measured value of the regeneration airflow rate Q required for the regeneration of the dehumidifying rotor 101. The measured value of the regeneration airflow rate Q is the measured value of the airflow rate of the second fan 124, and for example, the airflow rate of the second fan 124 may be the airflow rate measured by an air velocity sensor (not shown), or the airflow rate estimated based on the output value of the inverter 125 corresponding to the second fan 124. The fourth variable Δ4 is ​​the calculated value of the regeneration airflow rate Q required for the regeneration of the dehumidifying rotor 101 calculated using a calculation model. The calculated value of the regeneration airflow rate Q is obtained by equation (6) above.

[0066]

number

[0067] Here, we consider the energy consumption P2 relative to the regeneration airflow Q required to regenerate the dehumidifying rotor 101. The energy consumption P2 is expressed as the force that the motor exerts on the rotational shafts of the fans (first fan 112, second fan 124) to rotate the fans, i.e., as shaft power. Since the shaft power of the fans is generally proportional to the cube of the airflow, the energy consumption P2 is proportional to the cube of the third variable Δ3. Therefore, as the performance of the dehumidifying rotor 101 deteriorates, the third variable Δ3 increases, and consequently, the energy consumption P2 also increases.

[0068] For example, if the excess energy consumption Pa is defined as the value obtained by subtracting the fourth variable Δ4 from the third variable Δ3, the evaluation results will vary greatly depending on the season. Specifically, in summer, the energy consumption P2 required to regenerate the dehumidifying rotor 101 increases, and the airflow required to regenerate the dehumidifying rotor 101 also increases. On the other hand, in winter, the energy consumption P2 decreases, and the airflow required to regenerate the dehumidifying rotor 101 also decreases.

[0069] Thus, defining excess energy consumption Pa as "third variable Δ3 - fourth variable Δ4" makes it highly susceptible to seasonal influences, making it impossible to accurately evaluate the performance degradation of the dehumidifying rotor 101. On the other hand, by defining excess energy consumption Pa as the value obtained by dividing the third variable Δ3 by the fourth variable Δ4, as shown in equation (7) above, this value is effectively normalized to 1. This reduces the impact of seasonal variations, making it possible to stably and appropriately evaluate the performance of the dehumidifying rotor 101 throughout the year.

[0070] Next, we consider the relationship between the service life of the dehumidifying rotor 101 and the excess energy consumption Pa (third excess energy consumption). As shown in Figure 7, when the dehumidifying rotor 101 is in good condition and has not deteriorated, the third variable Δ3 and the fourth variable Δ4 are equal, and the excess energy consumption Pa is close to 1. On the other hand, when the deterioration of the dehumidifying rotor 101 progresses, the fourth variable Δ4 does not change because it is a calculated value, but the third variable Δ3 changes as the dehumidifying rotor 101 deteriorates because it is a measured value. As a result, the discrepancy between the third variable Δ3 and the fourth variable Δ4 increases, and the absolute value of the excess energy consumption Pa deviates more and more from 1. Therefore, the standard performance value B is used as a criterion for evaluating whether or not the dehumidifying rotor 101 has deteriorated based on the excess energy consumption Pa.

[0071] The reference performance value B represents the performance value of the dehumidifying rotor 101 when it is in good condition and has not deteriorated. The reference performance value B represents, for example, the initial value of the excess energy consumption Pa. The initial value of the excess energy consumption Pa is obtained, for example, by dividing the third variable Δ3 when the dehumidifying rotor 101 is in its initial state by the fourth variable Δ4, and is a value close to 1. In the example shown in Figure 7, the reference performance value B is set to 1. By setting the reference performance value B to the initial value of the excess energy consumption Pa, it becomes possible to appropriately evaluate whether or not the dehumidifying rotor 101 has deteriorated, regardless of the differences between individual dehumidifying rotors 101. Furthermore, by setting the reference performance value B to 1, the control configuration can be simplified. Information regarding the reference performance value B is stored, for example, in a memory device (not shown).

[0072] Let's consider the case where the excess energy consumption falls within a predetermined range β from the standard performance value B. The predetermined range β is, for example, the range in which the set airflow rate of the second fan 124 is allowed to deviate from the standard performance value B. If the excess energy consumption falls within the predetermined range β from the standard performance value B, that is, if the difference obtained by subtracting the standard performance value B from the excess energy consumption Pa (third variable Δ3 / fourth variable Δ4) falls within the predetermined range β, the dehumidification performance-related information generation unit 36 ​​determines that the dehumidification rotor 101 is not in a deteriorated state, or that the deterioration of the dehumidification rotor 101 is progressing but not serious. In this case, the dehumidification performance-related information generation unit 36 ​​may notify the user via the notification device 50 that the dehumidification rotor 101 is not in a deteriorated state, or it may be configured not to notify the user of such information. Note that the information notified to the user is not limited to information regarding the deterioration state of the dehumidification rotor 101, but may also be information regarding the excess energy consumption. This ensures that the user is notified of the dehumidification performance of the dehumidifying rotor 101 before it reaches a state requiring maintenance or replacement. Based on this information, the user can then appropriately plan the timing of maintenance or replacement of the dehumidifying rotor 101.

[0073] On the other hand, if the excess energy consumption Pa is outside a predetermined range β from the standard performance value B, that is, if the difference value obtained by subtracting the standard performance value B from the excess energy consumption Pa (third variable Δ3 / fourth variable Δ4) is outside the predetermined range β, the dehumidification performance-related information generation unit 36 ​​determines that the dehumidification rotor 101 is in a deteriorated state. In this case, the dehumidification performance-related information generation unit 36 ​​notifies the user, for example, via the notification device 50, of an alarm indicating that the dehumidification rotor 101 is in a deteriorated state. The notification device 50 may be configured so that the user can easily notice the alarm indicating the deteriorated state of the dehumidification rotor 101. For example, the notification device 50 may be configured to display the status of the excess energy consumption Pa, and if the excess energy consumption Pa falls outside a predetermined range β from the standard performance value B, the status of the excess energy consumption Pa may be highlighted or an alarm sound may be output.

[0074] Furthermore, even if the difference value obtained by subtracting the standard performance value B from the excess energy consumption Pa (third variable Δ3 / fourth variable Δ4) is within a predetermined range β, if the difference value is greater than or equal to a threshold, the dehumidification performance-related information generation unit 36 ​​may notify the user that the degree of deterioration of the dehumidification rotor 101 exceeds the standard value. In addition, the evaluation of whether or not the dehumidification rotor 101 has deteriorated can also be performed based on the second excess energy consumption. In this case, the excess energy consumption Pa is the second excess energy consumption, and the evaluation of whether or not the dehumidification rotor 101 has deteriorated can be performed in the same way as in the case of the third excess energy.

[0075] Furthermore, the excess energy consumption Pa increases as the usage period of the dehumidifying rotor 101 lengthens and is expressed as an accumulated value from the initial state. An increase in excess energy consumption Pa means that the performance of the dehumidifying rotor 101 has deteriorated by that amount, and in this case, the amount of electricity used (i.e., energy cost) also increases with the increase in excess energy consumption Pa. Therefore, the dehumidification performance-related information generation unit 36 ​​may be configured to determine the increase in energy consumption and the increase in electricity used due to the deterioration of the performance of the dehumidifying rotor 101 based on the excess energy consumption Pa.

[0076] 6-2. Second variation The first dew point temperature 11 may be a fixed value or a variable. For example, if the first dew point temperature 11 is a fixed value, the regeneration inlet target temperature T described above may be a fixed value. H Formula (1) is calculated using the outside air dew point temperature T do , supply air inlet temperature T i , air intake absolute humidity x i , and approximation coefficient A ijk It is constructed based on the following. On the other hand, if the first dew point temperature 11 is a variable, the regeneration inlet target temperature T H Formula (1) is calculated using the outside air dew point temperature T do , supply air inlet temperature T i , air intake absolute humidity x i Approximation coefficient A ijk, and may be configured based on the first dew point temperature DP1.

[0077] As another example, when the first dew point temperature 11 is a fixed value, the above formula (6) for calculating the regenerative airflow rate Q is used with respect to the outside air dew point temperature T do , supply air inlet temperature T i , air intake absolute humidity x i , and approximation coefficient A ijk It is constructed based on the following. On the other hand, if the first dew point temperature 11 is a variable, the regeneration inlet target temperature T H Formula (1) is calculated using the outside air dew point temperature T do , supply air inlet temperature T i , air intake absolute humidity x i Approximation coefficient A ijk , and may be configured based on the first dew point temperature DP1.

[0078] Furthermore, if the first dew point temperature 11 is a variable, the regeneration inlet target temperature T H It can also be made variable. In this case, the formula (6) for calculating the regenerative airflow rate Q is the outside air dew point temperature T do , supply air inlet temperature T i , air intake absolute humidity x i Approximation coefficient A ijk , the first dew point temperature DP1, and the regeneration inlet target temperature T H It may be structured based on this.

[0079] Thus, the target temperature T at the regeneration inlet. H By calculating the regenerative airflow rate Q, it is possible to improve the calculation accuracy compared to the above-described embodiment, and to obtain effects that are at least equivalent to or better than those of the above-described embodiment.

[0080] 6-3. Third variation During temperature control of the regenerative heater 121, the airflow of at least one of the first fan 112 and the second fan 124 may be controlled to output a constant airflow. For example, if the temperature of the regenerative heater 121 is controlled variably, the airflow of the second fan 124 may be controlled to a fixed output. Alternatively, if the temperature of the regenerative heater 121 is controlled stably, the airflow of at least one of the first fan 112 and the second fan 124 may be controlled to a variable output. By combining temperature control of the regenerative heater 121 and airflow control of the fans (first fan 112, second fan 124) in this way, it becomes possible to control the dew point in the low dew point chamber 20 more stably.

[0081] 6-4. Fourth variation In the above-described embodiment, the outside air dew point temperature is estimated by the outside air dew point temperature estimation unit 31 based on outside air temperature and humidity information (outside air temperature and outside air humidity) obtained by a thermometer 2 and a hygrometer 3 installed near the outside air outlet inside the dehumidifier 100, but is not limited to this. For example, the outside air dew point temperature may be a value measured by a measuring instrument (dew point meter) installed in the dehumidifier 100. In this case, the control device 30 obtains the outside air dew point temperature measured by the dew point meter. This makes it possible to obtain the same effects as in the above-described embodiment.

[0082] 6-5. Fifth variation In the embodiment described above, the excess energy consumption Pt is calculated by the excess energy consumption calculation unit 35 based on the temperature obtained by thermometer 123 and the temperature obtained by thermometer 126, but is not limited to this. For example, when calculating the excess energy consumption Pt, the control device 30 may use the temperature obtained by thermometer 2 (thermometer T2) instead of the temperature obtained by thermometer 126 (thermometer T4). [Explanation of Symbols]

[0083] 1...Dehumidification system, 2...Thermometer, 3...Hygrometer, 4...Thermometer, 5...Hygrometer, 11...First dew point temperature, 20...Low dew point chamber, 30...Control device, 31...Outside air dew point estimation unit, 32...Air supply inlet temperature and humidity estimation unit, 33...Regeneration inlet target temperature calculation unit, 34...Equipment output control unit, 35...Excess energy consumption calculation unit, 36...Dehumidification performance related information generation unit, 50...Notification device, 100...Dehumidifier, 101...Dehumidification rotor, 102...Inverter Duct, 110...First filter, 111...Precooler, 112...First fan, 113...Inverter, 114...Aftercooler, 115...Afterheater, 120...Second filter, 121...Regenerative heater, 122...Thyristor, 123...Thermometer, 124...Second fan, 125...Inverter, 126...Thermometer, 131...First duct, 131A...First branch duct, 132...Second duct, 133...Third duct

Claims

1. A dehumidification system that supplies low-dew-point air into a room, A dehumidifying rotor having an air supply area provided in a first duct connected to the room, which adsorbs moisture contained in a mixed air including outside air and discharges dehumidified air to the first duct, and a regeneration area provided in a second duct connected to an exhaust port, which discharges humid air containing the adsorbed moisture to the second duct, The second duct includes a regeneration heater provided at the entrance to the regeneration area for heating the humid air, The first duct includes a first fan provided on the inlet side of the air supply area, which increases or decreases the amount of dehumidified air being blown, The second duct includes a second fan provided on the outlet side of the regeneration area, which adjusts the airflow rate for sending the high-temperature, high-humidity air, heated by the regeneration heater, toward the exhaust port, A dehumidifier including, A control device connected to the dehumidifier, which performs at least one of the following: temperature control for controlling the temperature of the regenerating heater, first airflow control for controlling the airflow of the first fan, and second airflow control for controlling the airflow of the second fan. A notification device connected to the control device, Equipped with, The control device is The outdoor dew point temperature is estimated based on the outdoor air temperature and outdoor air humidity obtained by a measuring instrument installed in the dehumidifier, or the outdoor dew point temperature measured by a measuring instrument installed in the dehumidifier is obtained. Based on the inlet conditions of the aforementioned air supply area, the air supply inlet temperature, which indicates the temperature at the inlet of the aforementioned air supply area, and the air supply inlet absolute humidity, which indicates the absolute humidity at the inlet of the aforementioned air supply area, are estimated. Based on the outside air dew point temperature, the air intake temperature, and the air intake absolute humidity, the regeneration inlet target temperature, which indicates the target temperature at the inlet of the regeneration area, is calculated. During the operation of the dehumidifier, a first excess energy consumption corresponding to the regeneration heater is calculated based on at least the relationship between the target regeneration inlet temperature and the temperature upstream of the regeneration heater. Based on the first excess energy consumption, information regarding the dehumidification performance of the dehumidification rotor is generated. The device is configured to output information regarding the dehumidification performance to the notification device. A dehumidification system characterized by the following features.

2. A dehumidification system according to claim 1, The inlet conditions of the aforementioned air supply area are: The system includes at least one of the following: temperature and humidity information obtained by a thermometer and hygrometer installed at the inlet of the air supply area; mixing ratio information indicating the proportion of mixed air obtained by mixing outside air and return air from the room; and outlet temperature information of a cooler installed at the inlet of the air supply area to cool the mixed air. A dehumidification system characterized by the following features.

3. A dehumidification system according to claim 1, The control device is During operation of the dehumidifier, the system is configured to calculate at least the first excess energy consumption based on the regeneration inlet target temperature, and if the difference obtained by subtracting the standard performance value from the first excess energy consumption falls outside a predetermined range, it outputs an alarm via the notification device indicating that the dehumidifier rotor is in a deteriorated state. A dehumidification system characterized by the following features.

4. A dehumidification system according to claim 3, The initial value of the first excess energy consumption is set for the aforementioned standard performance value. A dehumidification system characterized by the following features.

5. A dehumidification system according to claim 4, The first excess energy consumption is calculated by dividing a first variable, which represents the difference between the inlet temperature of the regeneration area in the second duct and the temperature upstream of the regeneration heater in the second duct, by a second variable, which represents the difference between the target regeneration inlet temperature and the temperature upstream of the regeneration heater in the second duct. A dehumidification system characterized by the following features.

6. A dehumidification system that supplies low-dew-point air into a room, A dehumidifying rotor having an air supply area provided in a first duct connected to the room, which adsorbs moisture contained in a mixed air including outside air and discharges dehumidified air to the first duct, and a regeneration area provided in a second duct connected to an exhaust port, which discharges humid air containing the adsorbed moisture to the second duct, The second duct includes a regeneration heater provided at the entrance to the regeneration area for heating the humid air, The first duct includes a first fan provided on the inlet side of the air supply area, which increases or decreases the amount of dehumidified air being blown, The second duct includes a second fan provided on the outlet side of the regeneration area, which adjusts the airflow rate for sending the high-temperature, high-humidity air, heated by the regeneration heater, toward the exhaust port, A dehumidifier including, A control device connected to the dehumidifier, which performs at least one of the following: temperature control for controlling the temperature of the regenerating heater, first airflow control for controlling the airflow of the first fan, and second airflow control for controlling the airflow of the second fan. A notification device connected to the control device, Equipped with, The control device is The outdoor dew point temperature is estimated based on the outdoor air temperature and outdoor air humidity obtained by a measuring instrument installed in the dehumidifier, or the outdoor dew point temperature measured by a measuring instrument installed in the dehumidifier is obtained. Based on the inlet conditions of the aforementioned air supply area, the air supply inlet temperature, which indicates the temperature at the inlet of the aforementioned air supply area, and the air supply inlet absolute humidity, which indicates the absolute humidity at the inlet of the aforementioned air supply area, are estimated. Based on the outside air dew point temperature, the air intake temperature, and the air intake absolute humidity, the regenerative airflow rate indicating the target value of the airflow rate of the second fan is calculated. During operation of the dehumidifier, the third excess energy consumption corresponding to the second fan is calculated based on the relationship between the measured values ​​of the regenerated airflow and the airflow of the second fan. Based on the third excess energy consumption, information regarding the dehumidification performance of the dehumidification rotor is generated. The device is configured to output information regarding the dehumidification performance to the notification device. A dehumidification system characterized by the following features.

7. A dehumidification system according to claim 6, The control device is During operation of the dehumidifier, the system is configured to calculate at least the third excess energy consumption based on the regenerated airflow, and if the difference obtained by subtracting the standard performance value from the third excess energy consumption falls outside a predetermined range, it outputs an alarm via the notification device indicating that the dehumidifier rotor is in a deteriorated state. A dehumidification system characterized by the following features.

8. A dehumidification system according to claim 7, The initial value of the third excess energy consumption is set for the aforementioned standard performance value. A dehumidification system characterized by the following features.

9. A dehumidification system according to claim 8, The third excess energy consumption is calculated by dividing the third variable, which represents the measured value of the airflow of the second fan, by the fourth variable, which represents the regenerative airflow. A dehumidification system characterized by the following features.

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