JP2007263425A - Dehumidifying air conditioning system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a dehumidifying air conditioning system, favorably performing dehumidifying air conditioning for a space to be air-conditioned while contributing to energy saving. <P>SOLUTION: This dehumidifying air conditioning system includes: a dehumidifying air conditioning means (a dehumidifying device 6) for dehumidifying a space to be air-conditioned (a shop 2); a temperature detecting means (an interior temperature sensor 38) for detecting the temperature of the space to be air-conditioned (in the shop 2); a humidity detecting means (an interior humidity sensor 39) for detecting the relative humidity of the space to be air-conditioned (in the shop 2); and a control means (a centralized supervisory controller 20) for controlling the dehumidifying air-conditioning means (a dehumidifying device 6). The control means (the centralized supervisory controller 20) calculates the absolute humidity of the space to be air-conditioned (in the shop 2) from the temperature and the relative humidity of the space to be air-conditioned (in the shop 2) which are detected by the respective detecting means (the interior temperature sensor 38 and the interior humidity sensor 39), and controls the dehumidifying air-conditioning means (the dehumidifying device 6) to keep the absolute humidity to a predetermined reference value. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a dehumidifying air conditioning system that performs dehumidifying air conditioning in a conditioned space.

  Conventionally, a plurality of open showcases are installed in stores such as supermarkets and convenience stores, and frozen foods and refrigerated foods are displayed and sold in these open showcases. In addition, an air conditioner (air conditioner) is installed in the store, and the temperature and humidity in the store are controlled by the air conditioner (see Patent Document 1).

And the air conditioner air-conditioned the temperature in the store (the conditioned space) to about + 26 ° C. to + 28 ° C. and the humidity to about 50 to 60%. Since the air conditioner was controlled by relative humidity, when the reference value of humidity for controlling the inside of the store was 40%, for example, it was controlled at the same reference value throughout the year in summer and winter.
JP 2002-303431 A

  However, if the inside of the store is controlled at the same standard throughout the year with an air conditioner, in summer when the temperature is high + 28 ° C and humidity 40% and in winter when the temperature is low + 15 ° C and humidity 40% The amount of moisture contained in the air is different, and the amount of moisture in the air is overwhelmingly smaller in winter. For this reason, there has been a problem in that wasteful energy is consumed because the dehumidifying operation is performed in the air conditioner even though the amount of moisture contained in the air is actually small in the winter.

  The present invention was made to solve the problems of the related art, and an object thereof is to provide a dehumidifying air conditioning system that can more suitably perform dehumidifying air conditioning in a conditioned space while contributing to energy saving. To do.

  That is, the dehumidifying air-conditioning system of the present invention dehumidifies and air-conditions the conditioned space, the dehumidifying air-conditioning means for dehumidifying the conditioned space, the temperature detecting means for detecting the temperature of the conditioned space, Humidity detection means for detecting relative humidity and control means for controlling the dehumidifying air conditioning means, the control means calculates the absolute humidity of the conditioned space from the temperature and relative humidity of the conditioned space detected by each detection means. The dehumidifying and air-conditioning means is controlled to calculate and maintain this absolute humidity at a predetermined reference value.

  Moreover, the dehumidifying air conditioning system of the invention of claim 2 is characterized in that, in the above, the control means changes the reference value according to the temperature of the conditioned space.

  According to a third aspect of the present invention, there is provided a dehumidifying air conditioning system according to the first aspect of the present invention, further comprising an outside air temperature detecting means for detecting an outside air temperature, and the control means is based on the outside air temperature detected by the outside air temperature detecting means. It is characterized by changing.

  According to a fourth aspect of the present invention, in the dehumidifying air conditioning system according to the first, second, or third aspect, the control means has a reference value setting means, and the setting means is adapted to the temperature condition of the conditioned space. And a relative humidity condition are set.

  In the present invention, in a dehumidifying air conditioning system for dehumidifying and air-conditioning a conditioned space, dehumidifying air conditioning means for dehumidifying the conditioned space, temperature detecting means for detecting the temperature of the conditioned space, and humidity detection for detecting the relative humidity of the conditioned space And a control means for controlling the dehumidifying air-conditioning means. The control means calculates the absolute humidity of the conditioned space from the temperature and relative humidity of the conditioned space detected by each detecting means, and calculates the absolute humidity. Since the dehumidifying air-conditioning means is controlled so as to maintain the predetermined reference value, it is possible to contribute to energy saving by reducing the operating rate of the dehumidifying air-conditioning means by keeping the dehumidification amount constant and eliminating unnecessary dehumidifying operation. It becomes.

  In the invention of claim 2, in addition to the above, the control means changes the reference value in accordance with the temperature of the conditioned space. For example, the control means changes the reference value so that the reference value decreases as the temperature of the tuned space decreases. Therefore, it is possible to automatically realize a dehumidifying air conditioning that is always comfortable regardless of the season. In addition, when a cooling device is installed in the conditioned space, there is an effect that the amount of frost on the cooler can be reduced in a situation where the temperature of the conditioned space is low.

  In the invention of claim 3, in addition to claim 1, the control means changes the reference value according to the temperature detected by the outside air temperature sensor. For example, even if the outside air temperature changes suddenly, The reference value can be changed before the temperature changes. As a result, it is possible to prevent inconveniences such as discomfort for the customers who have visited the store. Therefore, even when the outside air temperature changes suddenly, a comfortable dehumidifying air conditioning can always be automatically realized.

  In the invention of claim 4, in addition to the above-described inventions, the control means has a reference value setting means, and the setting means is configured to set the temperature condition and the relative humidity condition of the conditioned space. Therefore, compared with the case where the absolute humidity originally obtained by the moisture weight and the dry air weight is set as the reference value as it is, it becomes easier for the user to understand intuitively and the operability is improved.

  The main feature of the present invention is to provide a dehumidifying air-conditioning system that can maintain an in-store environment such as a supermarket at a suitable humidity throughout the year and can save energy. The purpose of maintaining a suitable humidity throughout the year was realized by dehumidifying the conditioned space based on the temperature and relative humidity of the conditioned space.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a configuration diagram of a dehumidifying air-conditioning system 1 showing an embodiment of the present invention, and FIG. 2 is an internal configuration diagram of a dehumidifying device 6 configuring the dehumidifying air-conditioning system 1 of the present invention.

  The dehumidifying air conditioning system 1 in this embodiment performs dehumidifying air conditioning in a conditioned space (in the store 2). As shown in FIG. 1, a supermarket in which a plurality of open showcases 3 are installed in the store 2 is used. A dehumidifying device 6 (corresponding to the dehumidifying air-conditioning means of the present invention) installed outside the store 2, a supply air duct 10, a return air duct 11, and the like are constructed. Each open showcase 3 (hereinafter referred to as “showcase”) is connected to a machine room (not shown) of the supermarket or a refrigerator 8 installed outside by a pipe (not shown), and is supplied with refrigerant from the refrigerator 8. Show cooling capacity. In FIG. 1, four showcases 3 are shown, but there may be three or four or more open showcases 3.

  The dehumidifying air-conditioning system 1 includes a centralized management controller 20 (corresponding to the control means of the present invention) serving as a master machine for control, and control lines connected to the centralized management controller 20 by signal lines 21 and 22. A plurality of terminal controllers 24... Serving as slave units. The terminal controller 24 is provided in a plurality of showcases 3 installed in the store 2, a prefabricated refrigerator (not shown), a cooling device 8 for supplying refrigerant to them, and the like. The centralized management controller 20 and the terminal controller 24 are configured by, for example, a general-purpose microcomputer and include a storage unit (memory) that can store various data and a timer. Reference numeral 25 denotes a terminal controller connected to the centralized management controller 20.

  An ID is assigned to each of the centralized management controller 20 and each showcase 3 (terminal controller 24), and the centralized management controller 20 uses this ID to store data (a reference value, which will be described later, and the inside of the showcase 3). 4 temperature setting values, dehumidification control data, etc.). The centralized management controller 20 collects operation status data from each terminal controller 24 (from the dehumidifier 6 the humidity in the store 2 and from the showcase 3 the temperature in the cabinet 4 and the dehumidification status, alarm data from all). Then, the devices connected to each terminal controller 24 are centrally managed and controlled.

  The supply air duct 10 is connected to the inside air discharge part 14 (illustrated in FIG. 2) of the dehumidifying device 6 and the inside of the store 2 by piping. Although not shown, the supply air duct 10 branches in the middle and communicates with the store 2 at an outlet provided in the vicinity of the showcase 3 and at a ceiling outlet provided on the ceiling of the store 2. A pipe is connected in communication with the store 2.

  The return air duct 11 is connected by piping so as to communicate the inside air suction portion 13 (shown in FIG. 2) provided in the dehumidifier 6 and the ceiling portion of the store 2, and is formed in the ceiling portion. A plurality of ceiling inlets (not shown) are opened in the store 2.

  Here, the dehumidifying device 6 will be described in detail with reference to FIG. The dehumidifying device 6 is called a desiccant air conditioner. The dehumidifying device 6 includes a rotary dehumidifying device 32 including a moisture adsorbing element 31, a blower fan 33 for sucking inside air, a regeneration fan 34 for sucking outside air, and a regeneration heater ( Electric heater) 36 and the like. The blower fan 33 is operated and sucks the air in the return air duct 11 from the inside air suction portion 13 and passes through a moisture adsorption region (described later) of the moisture adsorption element 31, and then the supply air duct 10 from the inside air discharge portion 14. To discharge.

  Reference numeral 37 denotes an outside air intake device that communicates with the suction side of the blower fan 33. The outside air intake device 37 is always closed, but is configured to be able to take in outside air by the blower fan 33 when opened. Reference numerals 38 and 39 denote an indoor temperature sensor (corresponding to the temperature detecting means of the present invention) and an indoor humidity sensor (corresponding to the humidity detecting means of the present invention) provided in the inside air suction portion 13, respectively. The temperature and humidity of the air in the store 2 to be sucked are detected. The outside air intake device 37 performs ventilation by opening and ventilating at a time when the number of customers increases, and closing when the outside air temperature is high or conversely low. In addition, the moisture adsorption element 31 rises in temperature due to the heating by the heated outside air and the heat of condensation of the water, whereby the temperature of the air passing through the moisture adsorption region is raised to about + 40 ° C.

  The regeneration fan 34 is operated and sucks outside air from the regeneration air intake unit 41 and sequentially passes through the regeneration heater 36 and a moisture release region (to be described later) of the moisture adsorbing element 31. Discharge. Reference numerals 43 and 44 denote an outside air temperature sensor (corresponding to the outside air temperature detecting means of the present invention) and an outside air humidity sensor, which detect the temperature and humidity of the outside air, respectively.

  46 is a control device of the dehumidifying device 6 provided in the centralized controller 20, and this control device 46 outputs outputs from the indoor temperature sensor 38, the indoor humidity sensor 39, the outdoor air temperature sensor 43, the outdoor air humidity sensor 44, and the like. Based on the control, the blower fan 33, the regenerative fan 34, the regenerative heater 36, an electric motor described later, and the like are controlled.

  The central control controller 20 is provided with a power switch, a temperature input switch, a humidity input switch, and operation switches 26 (equivalent to the setting means of the present invention) such as the reference value 1 and the reference value 2, and the inside of the store 2 The indoor temperature sensor 38 for detecting the temperature of the room, the indoor humidity sensor 39 for detecting the humidity in the store 2, the dehumidifier 6 and the like are connected. The setting means will be described in detail later.

  The centralized management controller 20 controls the dehumidifying operation of the dehumidifying device 6 so that the predetermined set humidity is obtained based on the temperature and humidity in the store 2 detected by the indoor temperature sensor 38 and the indoor humidity sensor 39. In the store 2, air conditioning is performed by an air conditioning device (not shown) connected to the centralized controller 20.

  On the other hand, the moisture adsorbing element 31 has a disk shape with a predetermined thickness and an air passage around it, and is driven by an electric motor (not shown) to rotate about half a minute, for example. The moisture adsorption element 31 is configured to adsorb moisture contained in the air when air passes through it. The air heated by the regenerative heater 36 has a delivery function for absorbing the moisture adsorbed on the moisture adsorption element 31 into the heated air by passing through the moisture adsorption element 31.

  Although the moisture adsorption element 31 rotated by the electric motor is not shown, an air passage provided in the periphery is partitioned by a region partition plate to constitute a first air passage and a second air passage. The portion of the moisture adsorption element 31 located in the first air passage is defined as the moisture adsorption region, and the portion of the moisture adsorption element 31 located in the second air passage is defined as the moisture release region.

  When attention is paid to a part of the moisture adsorption element 31, a cycle in which the part moves from the moisture adsorption region to the moisture release region and returns to the moisture adsorption region by being rotated by the electric motor is repeated. The outside air (regeneration air) sucked from the regeneration air intake 41 by the regeneration fan 34 is heated by the regeneration heater 36 and then passes through the moisture release region of the moisture adsorption element 31 from the second air passage. The regenerative air exhaust unit 42 is configured to be discharged to the outside.

  When the dehumidifying device 6 configured as described above is operated, the dehumidifying air conditioning system 1 drives the blower fan 33, the regeneration fan 34, and the moisture adsorption element 31, and further causes the regeneration heater 36 to generate heat. By the operation of the blower fan 33, the air in the ceiling portion of the store 2 returns from a suction port (not shown) provided in the ceiling portion, enters the air duct 11, and is sucked into the dehumidifying device 6 from the inside air suction portion 13. The sucked air is discharged from the inside air discharge unit 14 into the supply air duct 10 through the blower fan 33, the first air passage, and the moisture adsorption region of the moisture adsorption element 31.

  At this time, the moisture contained in the air is adsorbed by the moisture adsorption element 31 in the portion serving as the moisture adsorption region, and is transported to the moisture release region by rotation by the electric motor. Further, the dehumidified dry air discharged into the supply air duct 10 is blown out from the outlet through the branched supply air duct 10 to the floor of the store 2 near the showcase 3 (return). Moreover, after a part of air heat-exchanges with the indoor heat exchanger which is not shown in figure, it blows off from the blower outlet to the ceiling part of the shop 2 (return), and air conditioning is performed.

  The dehumidifying device 6 sucks outside air (regenerated air) from the regenerated air intake 41 by the operation of the regenerating fan 34. The sucked air is heated to about + 140 ° C. by the regenerative heater 36, further passes through the moisture release area of the moisture adsorption element 31, and is discharged to the outside through the regeneration fan 34 through the regeneration air exhaust unit 42. At this time, the outside air is discharged to the outside after receiving the moisture adsorbed by the moisture adsorption element 31 in the moisture adsorption area in the moisture release area of the moisture adsorption element 31. Such moisture adsorption and release action is continuously achieved by the rotation of the moisture adsorption element 31.

  That is, the moisture adsorbed by the moisture adsorption element 31 in the moisture adsorption region is transported to the moisture release region by the rotation of the moisture adsorption element 31, where it is absorbed by the outside air heated by the regenerative heater 36, and finally to the outside. Discharged. As a result, the air blown into the store 2 through the supply air duct 10 is dehumidified as described above, so that the inside of the store 2 is dehumidified, and the humidity is reduced or the increase in humidity is suppressed.

  In this case, the dehumidifying air conditioning system 1 controls the fans 33 and 34, the regenerative heater 36, and the electric motor of the moisture adsorption element 31 based on the outputs of the sensors 38, 39, 43 and 44, and maintains the interior of the store 2 at the set humidity. To do. That is, the dehumidifying air-conditioning system 1 energizes the regenerative heater 36 and the regenerative fan 34 based on the output of the indoor humidity sensor 39 when the humidity in the store 2 is higher than the set value, and stops energization when the humidity is lower. 2 is controlled to the set humidity.

  The indoor humidity sensor 39 provided in such a dehumidifying air conditioning system 1 can only measure relative humidity. Therefore, in the dehumidifying air-conditioning system 1, the temperature in the store 2 detected by the indoor temperature sensor 38 and the relative humidity in the store 2 detected by the indoor humidity sensor 39 are used by using an approximation curve (FIG. 3). The absolute humidity is calculated, and the dehumidifier 6 is operated so as to maintain the absolute humidity at the reference value. The centralized management controller 20 is configured to perform a defrosting operation of the cooler 5 with reference to this absolute humidity. FIG. 3 shows the relationship between temperature and absolute humidity when the relative humidity is 100%.

That is, the calculation formula for calculating the absolute humidity from the temperature and the relative humidity is H _A = H _{R /} 100 {0.0004365xT ³ + 0.001967xT ² + 0.33373xT + 3.6683} (absolute humidity H _A [g / kg] ], Temperature T [° C.], relative humidity H _R [%]). This calculation formula is stored and executed in the memory of the centralized management controller 20 (microcomputer). The table showing the relationship among temperature, relative humidity, and absolute humidity is a well-known table and will not be described in detail. Moreover, the data of the table | surface which shows the relationship between temperature, relative humidity, and absolute humidity is memorize | stored in the memory of the centralized controller 20 (microcomputer), the temperature in the store 2 which the indoor temperature sensor 38 detected, and indoor humidity Based on the relative humidity in the store 2 detected by the sensor 39, the absolute humidity may be obtained from the data in the table stored in the memory.

  Then, the dehumidifying air conditioning system 1 performs dehumidification from the absolute humidity calculated by the centralized controller 20 based on the above calculation formula. Specifically, when an absolute humidity corresponding to a temperature of + 28 ° C. and a relative humidity of 40% is set as a reference value, for example, an absolute humidity corresponding to a temperature of + 28 ° C. and a relative humidity of 45% is set as a reference upper limit value, The absolute humidity corresponding to + 28 ° C. and 35% relative humidity is determined as the reference lower limit value. That is, the reference upper limit value and the reference lower limit value are set to + 28 ° C. · 40 ± 5% with respect to the reference value + 28 ° C. · 40%. This reference value was set based on the summertime when the humidity was particularly high.

  However, if the absolute humidity at + 28 ° C / 40% is fixed as the reference value, it will correspond to the reference value (absolute humidity) at this time when the temperature reaches, for example, + 15 ° C in winter when the temperature is low. Relative humidity will be quite high. For this reason, if the same reference value is used throughout the year, the dehumidifying operation is not performed until the relative humidity becomes extremely high in winter, which causes discomfort to customers who visit the store.

  Therefore, in the present invention, two reference values (reference value 1 and reference value 2) are provided, and by changing these reference values in summer and winter, a comfortable environment can be provided to customers throughout the year. That is, with the operation switch 26 (temperature input switch and humidity input switch) as the setting means, the temperature condition and relative humidity condition (higher reference value (reference value 1) and lower reference value (reference value 2) in the store 2 are set. )) Is set so that a higher reference value can be set in summer and a lower reference value in winter.

  Specifically, when a higher reference value is input, + 28 ° C. is input through the temperature input switch, and 40% is input through the humidity input switch, and the reference value 1 is set. When a lower reference value is input, + 15 ° C. is input by the temperature input switch, and 40% is input by the humidity input switch, and the reference value 2 is set. The input reference value 1 and reference value 2 are stored in the memory of the central management controller 20 and executed.

  Then, the centralized controller 20 calculates the absolute humidity in the store 2 from the temperature and relative humidity in the store 2 detected by the indoor temperature sensor 38 and the indoor humidity sensor 39, and the reference upper limit value and the reference lower limit value of the reference value 1 The value is controlled at + 28 ° C./40±5%, the reference lower limit value of reference value 2 and the reference lower limit value at + 15 ° C./40±5%. The set temperature and set humidity of the reference value 1 and the reference value 2 are not limited to the set temperature and set humidity, and may be other set temperatures and set humidity.

  In addition, in the instruction manual of the dehumidifying air conditioning system 1, when it is desired to input a higher reference value, the reference value 1 should be entered as + 28 ° C. with the temperature input switch and 40% with the humidity input switch. When it is desired to input a lower reference value, the reference value 2 is described so that + 15 ° C. is input with the temperature input switch and 40% is input with the humidity input switch. Accordingly, even an operator who uses the dehumidifying air conditioning system 1 for the first time can conveniently operate the dehumidifying air conditioning system 1.

  Next, the operation of the dehumidifying air conditioning system 1 provided with the two reference values as described above will be described in detail with reference to the flowchart of FIG. In the description of the flowchart, the reference value 1 (set temperature of the reference upper limit value) and the reference value 2 (set temperature of the reference lower limit value) are each referred to as a reference temperature. If the reference value is changed in step S1, the centralized controller 20 proceeds to step S2 and calculates the reference humidity (absolute humidity) from the temperature and humidity of the changed reference value (reference value 1 or reference value 2). . The case where the reference value is changed in step S1 means that either the reference value 1 or the reference value 2 is selected and changed by the operator (in this case, the reference value 2 is selected).

  In step S3, the centralized controller 20 calculates the reference humidity from the selected reference value, and if the determined time is a predetermined time, the process proceeds to step S4, and the room temperature (in room 2) detected by the indoor temperature sensor 38 ( If the temperature in the store 2) is higher than the reference temperature of the selected reference value (reference value 2), the process proceeds to step S5. Since the temperature in the store 2 is higher than the reference temperature, the centralized management controller 20 sets the dehumidifying operation control of the dehumidifying device 6 to the reference value 1 and proceeds to step S6, where the store 2 reaches the opening time. If YES in step S7, the flow advances to step S7 to start the dehumidifying operation of the dehumidifying device 6.

  During the dehumidifying operation of the dehumidifying device 6 in step S8, the centralized controller 20 has changed the current temperature in the store 2 detected by the indoor temperature sensor 38, or the reference value has been changed by the operator. Proceed to step S9. Therefore, the centralized management controller 20 calculates and calculates the absolute humidity again from the temperature in the store 2 where the change has occurred or the changed reference value, transmits the data to the dehumidifier 6 and ends.

  On the other hand, in step S8, the central control controller 20 ends if there is no change in the current temperature in the store 2 detected by the room temperature sensor 38 and the reference value has not been changed by the operator. If the central management controller 20 has not reached the store opening time of the store 2 in step S6, the central control controller 20 proceeds to step S11 and stops after the dehumidifying operation of the dehumidifying device 6 is stopped.

  In step S4, when the temperature in the store 2 detected by the indoor temperature sensor 38 is not higher than the reference temperature, the centralized management controller 20 proceeds to step S10, and performs the dehumidifying operation control of the dehumidifying device 6 to the reference value 2. The process proceeds to step S6, and the subsequent steps are executed. Further, in step S3, the centralized controller 20 calculates the reference humidity from the selected reference value, and if the determined time has not reached the predetermined time, the process proceeds to step S6, and the subsequent steps are executed. . Furthermore, if the reference value has not been changed in step S1, the central management controller 20 proceeds to step S3 and executes the subsequent steps.

  That is, in steps S1 to S2, the reference absolute humidity is calculated from the changed reference value, and in steps S3 to S5, the current temperature in the store 2 is compared with the reference value temperature at a fixed time every day. Select the reference absolute humidity (reference value 1 or reference value 2). In steps S6 to S9, if the reference absolute humidity is changed when the store 2 is opened, or if the current temperature in the store 2 is changing, the absolute value to be set in the dehumidifier 6 from that temperature. Calculate the humidity and set the reference value. Thereby, even when absolute humidity is changed or when the temperature in the store 2 changes, the interior of the store 2 can be maintained in a comfortable space.

  As described above, the dehumidifying air conditioning system 1 includes the dehumidifying device 6 that dehumidifies the inside of the store 2, the indoor temperature sensor 38 that detects the temperature in the store 2, the indoor humidity sensor 39 that detects the relative humidity in the store 2, and the dehumidifying device. And a centralized management controller 20 that controls the device 6. Then, the centralized controller 20 calculates the absolute humidity in the store 2 from the temperature and relative humidity in the store 2 detected by the indoor temperature sensor 38 and the indoor humidity sensor 39, and maintains this absolute humidity at a predetermined reference value. Since the dehumidifying device 6 is controlled to do so, the dehumidifying amount can be always controlled to be constant. Thereby, unnecessary dehumidifying operation of the dehumidifying air conditioning system 1 can be eliminated, and the operating rate of the dehumidifying device 6 can be greatly reduced.

  Moreover, since the centralized management controller 20 can change the reference value of absolute humidity according to the temperature in the store 2, for example, the lower the temperature in the store 2, the lower the reference value of absolute humidity. By doing so, it becomes possible to automatically realize a dehumidifying air conditioning that is always comfortable throughout the year regardless of the season. Moreover, when the cooling device is installed in the store 2, there is an effect that the amount of frost on the cooler can be reduced in a situation where the temperature in the store 2 is low.

  Further, the central control controller 20 has a setting means for setting a reference value of absolute humidity, and this setting means is configured to set a temperature condition and a relative humidity condition in the store 2. This makes it easier for the user to intuitively understand and improve the operability compared to the case where the absolute humidity originally obtained by the moisture weight and the dry air weight is set as the absolute humidity reference value as it is. .

  Next, operation | movement of the dehumidification air conditioning system 1 of this invention is demonstrated. In addition, the dehumidification air-conditioning system 1 of the other Example of this invention has a structure substantially the same as the above-mentioned Example, and only dehumidification control of the centralized management controller 20 differs. Hereinafter, different parts will be described. The centralized management controller 20 has a program for changing the reference value based on the temperature of the outside air detected by the outside air temperature sensor 43.

  Then, when the outside air temperature rises rapidly during a predetermined time (for example, for 30 minutes or 60 minutes) in early summer, etc., and the temperature in the store 2 will eventually increase as time passes, The centralized management controller 20 operates the dehumidifying air conditioning system 1 at the reference value 1 before the temperature in the store 2 rises. In addition, the outside air temperature suddenly falls within a predetermined time (for example, 30 minutes or 60 minutes) in late autumn or early winter, and the temperature in the store 2 will eventually decrease as time passes. In this case, the centralized management controller 20 operates the dehumidifying air conditioning system 1 at the reference value 2 before the temperature in the store 2 becomes low.

  In this case, the change of the operation reference value of the dehumidifying air conditioning system 1 is past data that has actually changed in advance (such as from what time to what time, how many minutes and how many minutes the outside temperature has changed) A plurality of data) are stored in memory of the centralized controller 20. Then, the centralized management controller 20 changes the operation reference value of the dehumidifying air conditioning system 1 by comparing the data stored in the memory with the change in the outside air temperature.

  Thereby, even when the outside air temperature suddenly changes, the central control controller 20 sets the operation reference value of the dehumidifying device 6 based on the outside temperature detected by the outside air temperature sensor 43 before the temperature in the store 2 changes. Since it can be changed, it is possible to prevent inconveniences such as discomfort for the customers who have visited the store. Therefore, even when the outside air temperature changes suddenly, a comfortable dehumidifying air conditioning can always be automatically realized.

  In the embodiment, the dehumidifying device 6 has been described as a desiccant air conditioner. However, the dehumidifying device 6 is not limited to the desiccant air conditioner, and chlorofluorocarbon or non-fluorocarbon gas (carbon dioxide gas, nitrogen gas, etc.) is used as a refrigerant. The present invention is also effective for an air conditioner having a refrigerant cycle.

  Further, the present invention is not limited to the above embodiments, and the present invention is effective even when various other changes are made without departing from the spirit of the present invention.

It is a block diagram of the dehumidification air-conditioning system which shows one Example of this invention (Example 1). It is an internal block diagram of the dehumidification apparatus which comprises the dehumidification air conditioning system of this invention. It is a figure which shows the approximate curve of absolute humidity at the time of relative humidity 100% from temperature and relative humidity. It is a flowchart which shows operation | movement of the other defrost control apparatus of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Dehumidification air-conditioning system 2 Store 3 Showcase 4 In-house 6 Dehumidifier 10 Supply air duct 11 Return air duct 20 Centralized control controller 24 Terminal controller 38 Indoor temperature sensor 39 Indoor humidity sensor

Claims (4)

In the dehumidifying air conditioning system that dehumidifies and air-conditions the conditioned space,
Dehumidifying air conditioning means for dehumidifying the conditioned space, temperature detecting means for detecting the temperature of the conditioned space, humidity detecting means for detecting relative humidity in the conditioned space, and control means for controlling the dehumidifying air conditioning means And
The control means calculates the absolute humidity of the conditioned space from the temperature and relative humidity of the conditioned space detected by each of the detection means, and controls the dehumidifying air conditioning means to maintain the absolute humidity at a predetermined reference value. A dehumidifying air conditioning system characterized by controlling.   The dehumidifying air conditioning system according to claim 1, wherein the control unit changes the reference value according to a temperature of the conditioned space.   2. The dehumidifying air conditioner according to claim 1, further comprising an outside air temperature detecting unit configured to detect an outside air temperature, wherein the control unit changes the reference value based on the outside air temperature detected by the outside air temperature detecting unit. system.   The said control means has the setting means of the said reference value, This setting means is set as the structure which sets the temperature condition and relative humidity condition of the said to-be-tuned space, The claim 1 characterized by the above-mentioned. Item 4. The dehumidifying air-conditioning system according to Item 2 or Item 3.

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