JP2010085023A - Humidity conditioning system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To adjust the optimum humidity conditioning capacity while minimizing thermo-off of each humidity conditioning unit, in a humidity conditioning system in which the plurality of humidity conditioning units having humidity conditioning circuits are connected in parallel to a compressor unit having a compressor. <P>SOLUTION: A main controller (1) controlling the humidity conditioning operation of the humidity conditioning system includes: a target temperature determining section (3) outputting at least one of a present humidity Mi of the indoor space of each humidity conditioning unit (10) and an outdoor outside air humidity Mo, and a target value Tes of an evaporation temperature of a refrigerant circuit (20) determined on the basis of a target humidity Ms of an indoor space for each humidity conditioning unit (10) so that the indoor humidity Mi of the indoor space of each humidity conditioning unit (10) approaches the target humidity Ms; and a set temperature determining section (7) outputting a set value Tem of the evaporation temperature determined on the basis of each target value Tes input from the target temperature determining section (3). <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a humidity control system that adjusts the humidity of air with an adsorption heat exchanger connected to a refrigerant circuit.

  2. Description of the Related Art Conventionally, there are known humidity control apparatuses that condition outdoor air or room air and supply the air after humidity adjustment to the room.

  The humidity control apparatus of Patent Document 1 includes a refrigerant circuit in which a compressor, a first adsorption heat exchanger, an expansion valve, a second adsorption heat exchanger, and a four-way switching valve are connected in a casing. In the first and second adsorption heat exchangers, an adsorbent is supported on the surface of the heat exchanger. A refrigerant is circulated through the refrigerant circuit to perform a vapor compression refrigeration cycle.

  In the refrigerant circuit, the setting of the four-way switching valve is switched between the first state and the second state. When the four-way switching valve is in the first state, the discharge side of the compressor and the first adsorption heat exchanger are connected, and the suction side of the compressor and the second adsorption heat exchanger are connected. That is, the first adsorption heat exchanger is set on the high pressure side, and the second adsorption heat exchanger is set on the low pressure side.

  In this first state, the refrigerant discharged from the compressor condenses in the first adsorption heat exchanger on the high pressure side. The condensed refrigerant is depressurized by the expansion valve and then evaporated by the second adsorption heat exchanger on the low pressure side. The evaporated refrigerant is sucked into the compressor again. By the operation (first operation) as described above, in each humidity control unit, the adsorbent of the first adsorption heat exchanger is heated and regenerated by the refrigerant, while the adsorbent of the second adsorption heat exchanger becomes the refrigerant. After cooling, moisture in the air is adsorbed by the adsorbent.

  In addition, when the four-way switching valve is in the second state, the discharge side of the compressor and the second adsorption heat exchanger are connected, and the suction side of the compressor and the first adsorption heat exchanger are connected. That is, contrary to the first state, the first adsorption heat exchanger is set on the low pressure side, and the second adsorption heat exchanger is set on the high pressure side.

  In this second state, the refrigerant compressed by the compressor is condensed by the second adsorption heat exchanger on the high pressure side. The condensed refrigerant is depressurized by the expansion valve and then evaporated by the first adsorption heat exchanger on the low pressure side. The evaporated refrigerant is sucked into the compressor again. Through the operation (second operation) as described above, in each humidity control unit, the adsorbent of the second adsorption heat exchanger is heated and regenerated by the refrigerant, while the adsorbent of the first adsorption heat exchanger becomes the refrigerant. After cooling, moisture in the air is adsorbed by the adsorbent.

  The casing is formed with an outside air suction port, an inside air suction port, an air supply port, and an exhaust port. Inside the casing, an outside air passage communicating with the outside air suction port and the air supply port, an inside air suction port, and an exhaust port are formed. An inside air passage communicating with the mouth is formed. An air flow path switching mechanism and first and second adsorption heat exchangers are provided at a portion where the outside air passage and the inside air passage intersect.

  Then, by switching the air flow path switching mechanism, the air taken in from the outside air suction port is brought into contact with one of the first or second adsorption heat exchanger, and the humidity is adjusted. After air is blown out from the vent and the air taken in from the inside air inlet is brought into contact with the other of the first or second adsorption heat exchanger to adjust the humidity, the conditioned air can be blown out from the exhaust It has become.

  In the dehumidifying operation of the humidity control device, the adsorbent of the first or second adsorption heat exchanger on the low pressure side is always supplied with the air taken in from the outside air intake port while switching between the four-way switching valve and the air passage switching mechanism. The air blown out from the air supply port after being brought into contact with the air, and the air taken in from the inside air suction port is always brought into contact with the adsorbent of the first or second adsorption heat exchanger on the high pressure side and then blown out from the exhaust port. On the other hand, in the humidifying operation of the humidity control apparatus, the air taken in from the outside air suction port is always changed in the first or second adsorption heat exchanger on the high pressure side while switching the four-way switching valve and the air passage switching mechanism. After coming into contact with the adsorbent, the air is blown out from the air supply port, and the air taken in from the inside air intake port is always brought into contact with the adsorbent of the first or second adsorption heat exchanger on the low pressure side and then blown out from the exhaust port. Yes. As described above, the humidity control apparatus can perform continuous dehumidifying operation and humidifying operation.

Patent Document 2 discloses a refrigerant circuit in which a plurality of humidity control circuits having a first adsorption heat exchanger, an expansion valve, and a second adsorption heat exchanger are connected in parallel to a heat source circuit having a compressor. A multi-type humidity control system is disclosed. In this humidity control system, the heat source circuit is stored in a compressor unit, and each humidity control circuit is stored in a humidity control unit. And in this humidity control system, humidity control can be performed individually for each room by arranging the humidity control unit for each room.
JP 2004-294048 A Japanese Patent Application Laid-Open No. 2005-283053

  By the way, in the humidity control system as disclosed in Patent Document 2, there is a problem as to how the capacity control is performed for each humidity control circuit. For example, if each humidity control circuit is performed in the same manner as a multi-type air conditioning system, it is conceivable that indoor humidity cannot be controlled well.

  That is, in the case of the air conditioning system, for example, in the cooling operation, the operating capacity of the compressor is controlled so that the evaporation temperature of the refrigerant circuit becomes a preset temperature fixed in advance. For this reason, depending on the compressor operating conditions, the air conditioning capacity of the indoor unit may become excessive with respect to a certain indoor air conditioning load. In such a case, the indoor unit is thermo-offed so that the temperature in the room does not become lower than the set temperature.

 In the humidity control system, unlike the air conditioning system, the dehumidifying operation and the humidifying operation also serve as a ventilation operation. For this reason, when the humidity control capacity of the humidity control circuit becomes excessive with respect to the humidity control load in the room, if the humidity control circuit is thermo-off like the above air conditioning system, the outside air that is not conditioned is Will be supplied. Then, it is conceivable that the humidity in the room approaches the outside air humidity quickly and the humidity control state cannot be controlled well.

  The present invention has been made in view of such a point, and an object of the present invention is to provide each humidity control circuit in a humidity control system including a refrigerant circuit in which a plurality of humidity control circuits are connected to perform a vapor compression refrigeration cycle. The purpose is to adjust the optimum humidity control capacity without thermo-off as much as possible.

  The first invention relates to a heat source circuit (60) connected to a variable capacity compressor (53), a first adsorption heat exchanger (51) carrying an adsorbent, an expansion valve (55), and an adsorbent. A refrigerant circuit (20) for performing a vapor compression refrigeration cycle by connecting a plurality of humidity control circuits (50) connected to the second adsorption heat exchanger (52) carrying the gas, and the heat source circuit ( A first state in which the high pressure side of 60) and one end of the first adsorption heat exchanger (51) are connected to connect the low pressure side of the heat source circuit (60) and one end of the second adsorption heat exchanger (52). And connecting the high pressure side of the heat source circuit (60) and one end of the second adsorption heat exchanger (52) to connect the low pressure side of the heat source circuit (60) and one end of the first adsorption heat exchanger (51). A switching mechanism (54) that can be switched to the second state to be connected, and an adsorption heat exchanger (5) connected to the high pressure side or the low pressure side of the heat source circuit (60) by switching the switching mechanism (54). 1, 52) a humidity control system comprising a control means (1) for controlling the humidity control operation for sending the air contacted with the adsorbent to the target space corresponding to each of the adsorption heat exchangers (51, 52). It is assumed.

  Then, the control means (1) of the humidity control system includes the current humidity Mi of each target space and the outdoor humidity so that the current humidity Mi of the target space of each humidity control circuit (50) approaches the target humidity Ms. A humidity control circuit (50) corresponding to each target space using a target value Tes of the evaporation temperature of the refrigerant circuit (20) determined based on at least one of the outside air humidity Mo and the target humidity Ms of each target space. A target temperature determining unit (3) that outputs each time, and a set temperature determining unit that outputs a set value Tem of the evaporation temperature determined based on each target value Tes input from the target temperature determining unit (3) ( 7) and a compressor for controlling the operating capacity of the compressor (53) so that the current value Te of the evaporation temperature of the refrigerant circuit (20) approaches the set value Tem input from the set temperature determining unit (7) With a control unit (9) is doing.

  Here, the target value Tes is a value determined so that the current humidity Mi of the target space of each humidity control circuit (50) approaches the target humidity Ms. That is, it is the value of the evaporation temperature at which the humidity control capability of the humidity control circuit (50) and the humidity control load are substantially equal.

  In the first invention, unlike the air conditioning system described above, each humidity control circuit (50) is based on the operating status of the humidity control circuit (50), that is, based on the current humidity Mi, the outside air humidity Mo, and the target humidity Ms. The optimum target value Tes is determined every time, and the set value Tem is determined based on the target value Tes.

  That is, unlike the air conditioning system described above, the operating capacity of the compressor (53) is not controlled by the preset setting value Tem, but the setting value Tem is set from the humidity control circuit (50) side. Has been decided. By doing so, the humidity control capability of each humidity control circuit (50) can be made closer to the humidity control load. The humidity control capacity of the humidity control circuit (50) refers to the humidity control capacity of the adsorption heat exchanger (51, 52) included in the humidity control circuit (50).

  In a second aspect based on the first aspect, the set temperature determination unit (7) sets the smallest target value Tes among all the target values Tes input from the target temperature determination unit (3). The value Tem is output to the compressor control unit (9).

  In the second aspect of the invention, the smallest target value Tes among all the target values Tes input from the target temperature determination unit (3) is output to the compressor control unit (9) as the set value Tem.

  In this way, the set value Tem can be set to be equal to or less than the target value Tes of all the humidity control circuits (50), and all the humidity control circuits (50) have insufficient humidity control capability within a range in which thermo-off is not performed as much as possible. It can be made difficult to generate.

  According to a third invention, in the first or second invention, the control means (1) includes the current humidity Mi of the target space corresponding to each humidity control circuit (50) and the target humidity of the target space. Ms and the adsorption heat exchanger (51, 52) connected to the low pressure side of the heat source circuit (60) among the first and second adsorption heat exchangers (51, 52) of each humidity control circuit (50) A capacity determination unit (8a) that determines whether the capacity is increased or decreased for each humidity control circuit (50) and outputs a signal corresponding to the determination based on the current value SH of the outlet superheat degree; A set temperature changing unit (8b) that increases or decreases the set value Tem input to the compressor control unit (9) from the current level based on a signal input from the capacity determination unit (8a) is provided. It is characterized by.

  In the third aspect of the invention, in the capacity determination unit (8a), it is determined that the humidity control circuit (50) having sufficient humidity control capacity with respect to the humidity control load is down, and the humidity control capacity with respect to the humidity control load. Humidity adjustment circuit (50) that lacks is determined to have increased capacity. And based on the determination result for each humidity control circuit (50), the set temperature changing unit (8b) can change the set value Tem input to the compressor control unit (9).

  Note that the determination performed by the capacity determination unit (8a) is, for example, that the humidity control capacity of the humidity control circuit (50) is greater than the humidity control load by comparing the current humidity Mi of the target space with the target humidity Ms. And the adsorption heat exchanger (henceforth, low pressure side) connected to the low voltage | pressure side of the said heat source circuit (60) among the 1st, 2nd adsorption heat exchangers (51,52) of the humidity control circuit (50) at that time When the current value SH of the outlet superheat degree of (51, 52) is larger than the upper limit value, the capacity determination unit (8a) reduces the capacity of the humidity control circuit (50). Is determined. Here, the upper limit value of the outlet superheat degree may be a value close to the outlet superheat degree when the expansion valve (55) is at the minimum opening. In this way, it is possible to reliably determine the ability reduction.

  On the other hand, comparing the current humidity Mi and the target humidity Ms, the humidity control capacity of the humidity control circuit (50) is smaller than the humidity control load, and the low-pressure side adsorption heat exchanger (51, 52) at that time When the outlet superheat degree is smaller than the lower limit value, the capacity determination unit (8a) determines that the humidity control circuit (50) is increased in capacity. Here, the lower limit value of the degree of superheat at the outlet may be set to a small value such that the liquid refrigerant is not sucked into the compressor (53). In this way, it is possible to reliably determine whether the ability has been increased.

  In a fourth aspect based on the third aspect, the set temperature changing unit (8b) is a signal indicating that the signal for each humidity control circuit (50) input from the capability determining unit (8a) is a capability down signal. In this case, the setting value Tem input to the compressor control unit (9) is configured to be higher than the current value.

  In the fourth aspect of the invention, when the set temperature changing unit (8b) determines that the humidity adjustment capacity of each of the humidity adjustment circuits (50) is excessively small, the set value Tem is set to be higher than the present value. The humidity control capability of all the humidity control circuits (50) can be reduced uniformly within a range where the humidity control capability is not insufficient.

  According to a fifth invention, in the third or fourth invention, the set temperature changing unit (8b) is configured such that when at least one of the signals input from the capability determining unit (8a) is a capability up signal The setting value Tem input to the compressor control unit (9) is configured to be lower than the present value.

  In the fifth aspect of the invention, when the set temperature changing unit (8b) determines that the humidity control capability is insufficient in at least one humidity control circuit (50), the set value Tem is set lower than the present value. Thus, the humidity control capability of each humidity control circuit (50) can be increased uniformly within a range where the humidity control capability is not so slight.

  According to a sixth invention, in any one of the first to sixth inventions, the control means (1) includes at least one of a current humidity Mi of the target space and an outdoor outdoor humidity Mo, and the target space. Based on the target humidity Ms and the set value Tem input from the set temperature determination unit (7), the first and second adsorption heat exchangers (51) of the humidity control circuit (50) corresponding to the target space. , 52) a set superheat degree determination unit (4) for determining and outputting a set value SHs of the outlet superheat degree of the adsorption heat exchanger (51, 52) connected to the low pressure side of the heat source circuit (60) The adsorption heat so that the current value SH of the outlet superheat degree approaches the set value SHs of the outlet superheat degree of the adsorption heat exchanger (51, 52) input from the set superheat degree determining unit (4). A first expansion valve controller (5a) for controlling the opening of the expansion valve (55) corresponding to the exchanger (51, 52); It is characterized in Rukoto.

  In the sixth aspect of the present invention, the humidity control capacity of each humidity control circuit (50) is controlled by the set superheat degree determination unit (4) and the first expansion valve control unit (5a) of the compressor (53). It can be performed by capacity control and opening degree control of the expansion valve (55) based on the outlet superheat degree SH. Thereby, the humidity control capability of each humidity control circuit (50) can be made closer to the humidity control load.

  In a sixth aspect based on the sixth aspect, the control means (1) includes at least one of the current humidity Mi of the target space and the outdoor outdoor humidity Mo, the target humidity Ms of the target space, and the setting. Based on the set value Tem input from the temperature determining unit (7), the heat source of the first and second adsorption heat exchangers (51, 52) of the humidity control circuit (50) corresponding to the target space. The adsorption heat exchanger (51, 52) so that the current value SH of the outlet superheat degree of the adsorption heat exchanger (51, 52) connected to the low pressure side of the circuit (60) becomes the set value SHs of the outlet superheat degree. 52), the second expansion valve control section (5b) that adjusts the opening degree of the expansion valve (55) by feedforward control is provided.

  In the seventh invention, the second expansion valve control section (5b) can adjust the opening degree of the expansion valve (55) with an opening degree predicted in advance, and the humidity control circuit (50) can control the humidity. It is possible to reduce the fluctuation when the capacity is adjusted by the expansion valve (55).

  In an eighth aspect based on the sixth aspect, the control means (1) includes a first expansion valve control section (1) corresponding to the target space so that the current humidity Mi of the target space approaches the target humidity Ms. A setting superheat degree changing section (6) for changing the set value SHs input to 5a) is provided.

  In the eighth invention, the set superheat degree changing unit (6) changes the set value SHs input to the first expansion valve control unit (5a) so that the current humidity Mi approaches the target humidity Ms. be able to.

  For example, when the speed at which the current humidity Mi of the target space approaches the target humidity Ms is slower than expected, or when moving away in a direction where the capacity is insufficient, the humidity control capacity must be increased. The set value SHs is made smaller than the current value. Then, the first expansion valve control part (5a) controls the valve of the expansion valve (55) to open so that the current value SH approaches the set value SHs that has decreased. Thereby, the refrigerant | coolant which flows through the said adsorption heat exchanger (51,52) increases, and humidity control capability is increased.

  On the other hand, when the speed at which the current humidity Mi of the target space approaches the target humidity Ms is too fast, or when the capacity moves away in an excessive direction, the humidity control capacity must be reduced. The set value SHs is set larger than the current value. Then, the first expansion valve control unit (5a) controls the expansion valve (55) to be closed so that the current value SH approaches the set value SHs that has increased. Thereby, the refrigerant | coolant which flows through the said adsorption heat exchanger (51,52) reduces, and humidity control capability is reduced.

  According to the present invention, the set value Tem is determined based on the optimum target value Tes determined in accordance with the operating condition of the humidity control circuit (50). If it carries out like this, the humidity control capability of each humidity control circuit (50) can be made closer to a humidity control load rather than the air conditioning system mentioned above.

  As a result, it is possible to adjust the humidity control capacity optimally without making each of the humidity control circuits (50) thermo-off as much as possible.

  According to the second aspect of the invention, by setting the smallest target value Tes among all the target values Tes input from the target temperature determining unit (3) to the set value Tem, all adjustments are performed. In the humidity circuit (50), it is possible to adjust the optimum humidity adjustment capability while making it difficult to cause a shortage of the humidity adjustment capability within a range where the thermo-off is not performed as much as possible.

  Further, according to the third invention, the capacity determination unit (8a) determines whether the capacity is increased or decreased for each humidity control circuit (50) as necessary, and based on the determination result, The set value Tem input to the compressor controller (9) can be changed. Thereby, the said setting value Tem can be optimally set according to the capability change of each humidity control circuit (50).

  According to the fourth aspect of the present invention, in all the humidity control circuits (50), when the humidity control capability is determined to be excessive, the set value Tem is set higher than the present value to control the humidity control capability. As long as there is no shortage, the humidity control capacity of all the humidity control circuits (50) can be reduced uniformly. Thereby, since the humidity control capability of all the humidity control circuits (50) approaches the humidity control load, it is possible to adjust the optimal humidity control capability without turning off each of the humidity control circuits (50) as much as possible.

  According to the fifth aspect of the present invention, when it is determined that the humidity control capability is insufficient in at least one humidity control circuit (50), the set value Tem is set lower than the present value to control the humidity control capability. As long as is not so slight, the humidity control capacity of each humidity control circuit (50) can be increased uniformly. Thereby, in all the humidity control circuits (50), the humidity control capability can be optimally adjusted without causing a shortage of the humidity control capability.

  According to the sixth aspect of the invention, the humidity control capacity of each of the humidity control circuits (50) is determined based on the capacity control of the compressor (53) and the opening of the expansion valve (55) based on the outlet superheat degree SH. The humidity control capability of each humidity control circuit (50) can be made closer to the humidity control load. As a result, it is possible to adjust the humidity adjustment capacity more optimally without turning off each of the humidity control circuits (50) as much as possible.

  According to the seventh aspect of the present invention, the second expansion valve control unit (5b) can adjust the opening of the expansion valve (55) with a predicted opening, and each humidity control circuit ( 50) The fluctuation when adjusting the humidity control ability can be reduced. As a result, it is possible to adjust the humidity control capacity optimally while keeping the humidity control circuits (50) as stable as possible.

  According to the eighth aspect of the invention, the setting is input to the first expansion valve control unit (5a) by the set superheat degree changing unit (6) so that the current humidity Mi approaches the target humidity Ms. The value SHs can be changed. Thereby, the humidity control capability of each humidity control circuit (50) can be made closer to the humidity control load.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. The following embodiments are essentially preferable examples, and are not intended to limit the scope of the present invention, its application, or its use.

  The humidity control system of this embodiment includes a compressor unit (60a) and a humidity control unit (10). Each humidity control unit (10) adjusts the humidity of the taken outdoor air (OA) and supplies it to the room. Each humidity control unit (10) is installed, for example, behind the ceiling. The humidity control system of the present embodiment is provided with a plurality of humidity control units (10a, 10b, 10c). These humidity control units (10a, 10b, 10c) have the same configuration.

<Overall configuration of humidity control unit>
First, the configuration of the humidity control unit (10) will be described with reference to FIG. 1 as appropriate. Unless otherwise specified, “upper”, “lower”, “left”, “right”, “front”, “rear”, “front”, and “back” used in the description here refer to the humidity control unit (10) from the front side. It means the direction when viewed.

  The humidity control unit (10) includes a casing (11). The casing (11) houses a humidity control circuit (50) that constitutes a part of a refrigerant circuit (20), which will be described in detail later. The humidity control circuit (50) is connected to the first adsorption heat exchanger (51), the second adsorption heat exchanger (52), the four-way switching valve (54), and the electric expansion valve (55).

  The casing (11) is formed in a rectangular parallelepiped shape that is slightly flat and relatively low in height. In the casing (11), the upper side surface (that is, the front surface) in FIG. 1 is the front panel portion (12), and the lower side surface (that is, the back surface) is the rear panel portion (13). In the casing (11), the right side surface in the plan view of FIG. 1 is the first side panel portion (14), and the left side surface is the second side panel portion (15).

  The casing (11) is formed with an outside air suction port (24), an inside air suction port (23), an air supply port (22), and an exhaust port (21). The outside air inlet (24) and the inside air inlet (23) are open to the back panel (13). The outside air inlet (24) is disposed in the lower part of the back panel (13). The inside air suction port (23) is arranged in the upper part of the back panel (13). The air supply port (22) is disposed near the end of the first side panel (14) on the front panel (12) side. The exhaust port (21) is disposed near the end of the second side panel (15) on the front panel (12) side.

  The internal space of the casing (11) includes an upstream divider plate (71), a downstream divider plate (72), a central divider plate (73), a first divider plate (74), and a second divider plate ( 75). These partition plates (71 to 75) are all erected on the bottom plate of the casing (11), and divide the internal space of the casing (11) from the bottom plate of the casing (11) to the top plate. .

  The upstream divider plate (71) and the downstream divider plate (72) are parallel to the front panel portion (12) and the rear panel portion (13), and are spaced at a predetermined interval in the longitudinal direction of the casing (11). Has been placed. The upstream divider plate (71) is disposed closer to the rear panel portion (13). The downstream partition plate (72) is disposed closer to the front panel portion (12).

  The first partition plate (74) and the second partition plate (75) are installed in a posture parallel to the first side panel portion (14) and the second side panel portion (15). The first partition plate (74) is spaced a predetermined distance from the first side panel (14) so as to close the space between the upstream partition plate (71) and the downstream partition plate (72) from the right side. Has been placed. The second partition plate (75) is spaced from the second side panel (15) by a predetermined distance so as to close the space between the upstream partition plate (71) and the downstream partition plate (72) from the left side. Has been placed.

  The central partition plate (73) is disposed between the upstream partition plate (71) and the downstream partition plate (72) in a posture orthogonal to the upstream partition plate (71) and the downstream partition plate (72). Yes. The central partition plate (73) is provided from the upstream partition plate (71) to the downstream partition plate (72), and the space between the upstream partition plate (71) and the downstream partition plate (72) is left and right. It is divided into.

  In the casing (11), the space between the upstream divider plate (71) and the back panel (13) is divided into two upper and lower spaces, and the lower space constitutes the outside air passage (34). The upper space constitutes the inside air passage (32). The outside air passage (34) communicates with the outside air inlet (24), and the inside air passage (32) communicates with the inside air inlet (23). A first filter (28) and an outside air humidity sensor (not shown) are installed in the outside air passage (34). A second filter (27) and an indoor humidity sensor (not shown) are installed in the room air passage (32).

  The space between the upstream divider plate (71) and the downstream divider plate (72) in the casing (11) is divided into left and right by the central divider plate (73), and is located on the right side of the central divider plate (73). The space constitutes the first heat exchanger chamber (37), and the space on the left side of the central partition plate (73) constitutes the second heat exchanger chamber (38). A first adsorption heat exchanger (51) is accommodated in the first heat exchanger chamber (37). The second adsorption heat exchanger (52) is accommodated in the second heat exchanger chamber (38). Moreover, although not shown in figure, the electric expansion valve (55) of the humidity control circuit (50) is accommodated in the 1st heat exchanger chamber (37).

  Each adsorption heat exchanger (51, 52) has an adsorbent supported on the surface of a so-called cross fin type fin-and-tube heat exchanger, and is a rectangular thick plate or flat rectangular parallelepiped as a whole. It is formed in a shape. Each adsorption heat exchanger (51, 52) is placed in the heat exchanger chamber (37, 38) with its front and back surfaces parallel to the upstream partition plate (71) and downstream partition plate (72). It is erected. Each adsorption heat exchanger (51, 52) constitutes an adsorption member that performs an adsorption operation for adsorbing moisture in the air and a regeneration operation (desorption operation) for releasing the adsorbed moisture into the air.

  In the internal space of the casing (11), the space along the front surface of the downstream partition plate (72) is partitioned vertically, and the upper portion of the vertically partitioned space is the air supply side passage ( 31), and the lower part constitutes the exhaust side passage (33).

  The upstream partition plate (71) is provided with four open / close dampers (41 to 44). Each damper (41-44) is formed in the shape of a substantially horizontally long rectangle. Specifically, in a part (upper part) facing the room air passage (32) in the upstream partition (71), the first room air damper (41) is attached to the right side of the central partition (73). The second inside air damper (42) is attached to the left side of the central partition plate (73). Moreover, in the part (lower part) which faces an external air side channel | path (34) among upstream side partition plates (71), the 1st external air side damper (43) is attached to the right side rather than a center partition plate (73), A second outside air damper (44) is attached to the left side of the central partition plate (73).

  The downstream partition plate (72) is provided with four open / close dampers (45 to 48). Each damper (45-48) is formed in the shape of a substantially horizontally long rectangle. Specifically, in the part (upper part) facing the supply side passageway (31) in the downstream partition plate (72), the first supply side damper (45) is located on the right side of the central partition plate (73). The second air supply side damper (46) is attached to the left side of the central partition plate (73). Moreover, in the part (lower part) which faces an exhaust side channel | path (33) among downstream partition plates (72), the 1st exhaust side damper (47) is attached to the right side rather than a center partition plate (73), A second exhaust side damper (48) is attached to the left side of the central partition plate (73).

  In the casing (11), the space between the air supply side passage (31) and the exhaust side passage (33) and the front panel portion (12) is divided into left and right by the partition plate (77). The space on the right side of (77) constitutes the air supply fan chamber (36), and the space on the left side of the partition plate (77) constitutes the exhaust fan chamber (35).

  The air supply fan (26) is accommodated in the air supply fan chamber (36). The exhaust fan chamber (35) accommodates an exhaust fan (25). The supply fan (26) and the exhaust fan (25) are both centrifugal multiblade fans (so-called sirocco fans). The air supply fan (26) blows out the air sucked from the downstream side partition plate (72) side to the air supply port (22). The exhaust fan (25) blows out the air sucked from the downstream partition plate (72) side to the exhaust port (21). Further, the four-way switching valve (54) of the humidity control circuit (50) is accommodated in the air supply fan chamber (36).

  In the casing (11), the space between the first partition (74) and the first side panel (14) forms a first bypass passage (81). The starting end of the first bypass passage (81) communicates only with the outside air passage (34) and is blocked from the inside air passage (32). The terminal end of the first bypass passage (81) is partitioned by the partition plate (78) from the air supply side passage (31), the exhaust side passage (33), and the air supply fan chamber (36). A first bypass damper (83) is provided in a portion of the partition plate (78) facing the supply fan chamber (36).

  In the casing (11), the space between the second partition (75) and the second side panel (15) constitutes a second bypass passage (82). The starting end of the second bypass passage (82) communicates only with the inside air passage (32) and is blocked from the outside air passage (34). The terminal end of the second bypass passage (82) is partitioned by the partition plate (79) from the air supply side passage (31), the exhaust side passage (33), and the exhaust fan chamber (35). A second bypass damper (84) is provided in a portion of the partition plate (79) facing the exhaust fan chamber (35).

  In the right side view and the left side view of FIG. 1, the first bypass passage (81), the second bypass passage (82), the first bypass damper (83), and the second bypass damper (84) are shown. Is omitted.

<Configuration of refrigerant circuit>
The humidity control system includes a refrigerant circuit (20) in which a refrigerant is circulated to perform a vapor compression refrigeration cycle. The refrigerant circuit (20) of the present embodiment is configured by connecting a plurality of humidity control circuits (50) in parallel to a heat source circuit (60).

  A compressor (53) is connected to the heat source circuit (60). The compressor (53) is a so-called inverter type compressor in which the rotation speed (ie, capacity) of the motor is variable. Further, the compressor (53) is constituted by, for example, a scroll type compressor. The heat source circuit (60) is accommodated in a compressor unit (60a) different from the humidity control unit (10). However, the heat source circuit (60) may be accommodated in any of the plurality of humidity control units (10).

  One end of a high-pressure gas pipe (65) is connected to the discharge side of the compressor (53). The other end side of the high-pressure gas pipe (65) is branched into a plurality and connected to the inflow end of each humidity control circuit (50). One end of a low-pressure gas pipe (66) is connected to the suction side of the compressor (53). The other end of the low-pressure gas pipe (66) is branched into a plurality and connected to the outflow end of each humidity control circuit (50).

  In each humidity control circuit (50), the first adsorption heat exchanger (51), the electric expansion valve (55), and the second adsorption heat exchanger (52) are connected in order. The electric expansion valve (55) is an electronic expansion valve whose opening degree is adjustable. Further, the humidity control circuit (50) is provided with the four-way switching valve (54) as a switching mechanism.

  The four-way selector valve (54) has first to fourth ports. The first port of the four-way selector valve (54) is connected to the high-pressure side of the heat source circuit (60) via the high-pressure gas pipe (65), and the second port of the four-way selector valve (54) is connected to the low-pressure gas pipe ( It is connected to the low pressure side of the heat source circuit (60) via 66). The third port of the four-way switching valve (54) is connected to one end of the first adsorption heat exchanger (51), and the fourth port of the four-way switching valve (54) is connected to the second adsorption heat exchanger (52 ) Is connected to one end. The four-way switching valve (54) has a first state in which the first port and the third port communicate with each other and the second port and the fourth port communicate with each other, and the first port and the fourth port communicate with each other. The second state can be switched to the second state where the second port and the third port communicate with each other. That is, the four-way selector valve (54) in the first state shown in FIG. 2 connects the high pressure side of the heat source circuit (60) and one end of the first adsorption heat exchanger (51) to the low pressure of the heat source circuit (60). The side and one end of the second adsorption heat exchanger (52). The four-way switching valve (54) in the second state shown in FIG. 3 connects the high pressure side of the heat source circuit (60) and the second adsorption heat exchanger (52) to the low pressure side of the heat source circuit (60). The first adsorption heat exchanger (51) is connected.

<Configuration of controller>
The humidity control system is provided with a main controller (control means) (1) for controlling the humidity control operation of the humidity control system. As shown in FIG. 9, the main controller (1) includes a plurality of humidity control side sub-controllers (1a) and one compressor side sub-controller (1b).

  The sub-controller (1a) on each humidity control side is provided for each humidity control unit (10), and includes a target humidity input unit (2), a target temperature determination unit (3), and a set superheat degree determination unit (4 ), A set superheat degree changing unit (6), and first and second expansion valve control units (5a, 5b). The compressor-side sub-controller (1b) is provided in the compressor unit (60a), and includes a set temperature determination unit (7), a set temperature correction unit (8), and an inverter (compressor control unit) (9 ).

  The humidity control operation control performed by the main controller (1) configured as described above includes capacity control of each humidity control unit (10). Details will be described later.

-Driving action-
Each humidity control unit (10) of the humidity control system of the present embodiment selectively performs a dehumidification ventilation operation, a humidification ventilation operation, and a simple ventilation operation. The humidity control unit (10) during dehumidification ventilation operation or humidification ventilation operation adjusts the humidity of the taken outdoor air (OA) and then supplies it to the room as supply air (SA). The room air (RA) is discharged to the outside as exhaust air (EA). On the other hand, in each humidity control unit (10) during simple ventilation operation, the taken outdoor air (OA) is supplied to the room as supplied air (SA) as it is, and the taken indoor air (RA) is taken as it is as exhaust air (EA ) Is discharged outside the room. Hereinafter, each operation of the humidity control unit (10) will be described in detail.

<Dehumidification ventilation operation>
In the humidity control unit (10) during the dehumidification / ventilation operation, a first operation and a second operation described later are alternately repeated at predetermined time intervals (intervals of 3 minutes). That is, the operation time for each of the two operations in the dehumidifying ventilation operation is set to 3 minutes. During the dehumidifying ventilation operation, the first bypass damper (83) and the second bypass damper (84) are always closed.

  In the humidity control unit (10) during the dehumidification / ventilation operation, outdoor air is taken as the first air from the outside air inlet (24) into the casing (11), and indoor air is taken from the inside air inlet (23) to the casing (11). It is taken in as second air.

First, the first operation of the dehumidifying ventilation operation will be described. As shown in FIG. 4, during the first operation, the first inside air damper (41), the second outside air side damper (44), the second air supply side damper (46), and the first exhaust side damper ( 47) is opened, and the second inside air damper (42), the first outside air damper (43), the first air supply side damper (45), and the second exhaust side damper (48) are closed. Also,
In the humidity control circuit (50) during the first operation, the four-way switching valve (54) is set to the first state (the state shown in FIG. 2), and the first adsorption heat exchanger (51) is the condenser (high-pressure side). The second adsorption heat exchanger (52) becomes an evaporator (low-pressure side adsorption heat exchanger).

  The first air that has flowed into the outside air passage (34) and passed through the outside air filter (28) flows into the second heat exchanger chamber (38) through the second outside air damper (44), and thereafter It passes through the second adsorption heat exchanger (52). In the second adsorption heat exchanger (52), moisture in the first air is adsorbed by the adsorbent, and the heat of adsorption generated at that time is absorbed by the refrigerant. The first air dehumidified by the second adsorption heat exchanger (52) flows into the supply air passage (31) through the second supply air damper (46) and passes through the supply air fan chamber (36). Later, the air is supplied into the room through the air supply port (22).

  On the other hand, the second air that has flowed into the room air passage (32) and passed through the room air filter (27) flows into the first heat exchanger chamber (37) through the first room air damper (41), Thereafter, it passes through the first adsorption heat exchanger (51). In the first adsorption heat exchanger (51), moisture is desorbed from the adsorbent heated by the refrigerant, and the desorbed moisture is given to the second air. The second air given moisture in the first adsorption heat exchanger (51) flows into the exhaust side passage (33) through the first exhaust side damper (47) and passes through the exhaust fan chamber (35). It is discharged outside through the exhaust port (21).

  Next, the second operation of the dehumidifying ventilation operation will be described. As shown in FIG. 5, during this second operation, the second inside air side damper (42), the first outside air side damper (43), the first air supply side damper (45), and the second exhaust side damper ( 48) is opened, and the first inside air damper (41), second outside air damper (44), second air supply damper (46), and first exhaust damper (47) are closed. In the humidity control circuit (50) during the second operation, the four-way selector valve (54) is set to the second state (the state shown in FIG. 3), and the first adsorption heat exchanger (51) is the evaporator. The second adsorption heat exchanger (52) becomes a condenser (high pressure side adsorption heat exchanger).

  The first air flowing into the outside air passage (34) and passing through the outside air filter (28) flows into the first heat exchanger chamber (37) through the first outside air damper (43), and then Pass through the first adsorption heat exchanger (51). In the first adsorption heat exchanger (51), moisture in the first air is adsorbed by the adsorbent, and the adsorption heat generated at that time is absorbed by the refrigerant. The first air dehumidified by the first adsorption heat exchanger (51) flows into the supply air passage (31) through the first supply air damper (45) and passes through the supply air fan chamber (36). Later, the air is supplied into the room through the air supply port (22).

  On the other hand, the second air that has flowed into the room air passage (32) and passed through the room air filter (27) flows into the second heat exchanger chamber (38) through the second room air damper (42), Thereafter, it passes through the second adsorption heat exchanger (52). In the second adsorption heat exchanger (52), moisture is desorbed from the adsorbent heated by the refrigerant, and the desorbed moisture is given to the second air. The second air given moisture in the second adsorption heat exchanger (52) flows into the exhaust side passage (33) through the second exhaust side damper (48) and passes through the exhaust fan chamber (35). It is discharged outside through the exhaust port (21).

<Humidified ventilation operation>
In the humidity control unit (10) during the humidification ventilation operation, a first operation and a second operation described later are alternately repeated at predetermined time intervals (4 minute intervals). That is, the operation time for each of the two operations in the humidified ventilation operation is set to 3 minutes. During the humidification ventilation operation, the first bypass damper (83) and the second bypass damper (84) are always closed.

  In the humidity control unit (10) during the humidification ventilation operation, outdoor air is taken into the casing (11) from the outside air inlet (24) as second air, and indoor air is taken from the inside air inlet (23) to the casing (11). It is taken in as 1st air in.

  First, the 1st operation | movement of humidification ventilation operation is demonstrated. As shown in FIG. 6, during the first operation, the second inside air side damper (42), the first outside air side damper (43), the first air supply side damper (45), and the second exhaust side damper ( 48) is opened, and the first inside air damper (41), second outside air damper (44), second air supply damper (46), and first exhaust damper (47) are closed. In the humidity control circuit (50) during the first operation, the four-way switching valve (54) is set to the first state (the state shown in FIG. 2), and the first adsorption heat exchanger (51) is the condenser. The second adsorption heat exchanger (52) becomes an evaporator (low pressure side adsorption heat exchanger) as a (high pressure side adsorption heat exchanger).

  The first air that has flowed into the inside air passage (32) and passed through the inside air filter (27) flows into the second heat exchanger chamber (38) through the second inside air damper (42), and then To the second adsorption heat exchanger (52). In the second adsorption heat exchanger (52), moisture in the first air is adsorbed by the adsorbent, and the heat of adsorption generated at that time is absorbed by the refrigerant. The first air deprived of moisture in the second adsorption heat exchanger (52) flows into the exhaust side passage (33) through the second exhaust side damper (48) and passes through the exhaust fan chamber (35). It is discharged outside through the exhaust port (21).

  On the other hand, the second air that flows into the outside air passage (34) and passes through the outside air filter (28) flows into the first heat exchanger chamber (37) through the first outside air damper (43), Thereafter, it passes through the first adsorption heat exchanger (51). In the first adsorption heat exchanger (51), moisture is desorbed from the adsorbent heated by the refrigerant, and the desorbed moisture is given to the second air. The second air humidified by the first adsorption heat exchanger (51) flows through the first air supply damper (45) into the air supply passage (31) and passes through the air supply fan chamber (36). Later, the air is supplied into the room through the air supply port (22).

  Next, the second operation of the humidification ventilation operation will be described. As shown in FIG. 7, during the second operation, the first inside air damper (41), the second outside air damper (44), the second air supply damper (46), and the first exhaust damper ( 47) is opened, and the second inside air damper (42), the first outside air damper (43), the first air supply side damper (45), and the second exhaust side damper (48) are closed. In the humidity control circuit (50) during the second operation, the four-way selector valve (54) is set to the second state (the state shown in FIG. 3), and the first adsorption heat exchanger (51) is the evaporator. The second adsorption heat exchanger (52) becomes a condenser (high pressure side adsorption heat exchanger).

  The first air that has flowed into the room air passage (32) and passed through the room air filter (27) flows into the first heat exchanger chamber (37) through the first room air damper (41), and then Passes through the first adsorption heat exchanger (51). In the first adsorption heat exchanger (51), moisture in the first air is adsorbed by the adsorbent, and the adsorption heat generated at that time is absorbed by the refrigerant. The first air deprived of moisture by the first adsorption heat exchanger (51) flows into the exhaust side passage (33) through the first exhaust side damper (47) and passes through the exhaust fan chamber (35). It is discharged outside through the exhaust port (21).

  On the other hand, the second air that has flowed into the outside air passage (34) and passed through the outside air filter (28) flows into the second heat exchanger chamber (38) through the second outside air damper (44), Thereafter, it passes through the second adsorption heat exchanger (52). In the second adsorption heat exchanger (52), moisture is desorbed from the adsorbent heated by the refrigerant, and the desorbed moisture is given to the second air. The second air humidified by the second adsorption heat exchanger (52) flows through the second supply air damper (46) into the supply air passage (31) and passes through the supply air fan chamber (36). Later, the air is supplied into the room through the air supply port (22).

<Simple ventilation operation>
The operation of the humidity control unit (10) during the simple ventilation operation will be described with reference to FIG.

  In the humidity control unit (10) during the simple ventilation operation, the first bypass damper (83) and the second bypass damper (84) are opened, and the first room air damper (41) and the second room air damper ( 42), a first external air damper (43), a second external air damper (44), a first air supply damper (45), a second air supply damper (46), a first exhaust air damper (47), And the 2nd exhaust side damper (48) will be in a closed state. Further, during the simple ventilation operation, the compressor (53) of the heat source circuit (60) is stopped.

  In the humidity control unit (10) during the simple ventilation operation, outdoor air is taken into the casing (11) from the outside air inlet (24). The outdoor air that has flowed into the outside air passage (34) through the outside air inlet (24) flows from the first bypass passage (81) through the first bypass damper (83) into the supply fan chamber (36). Then, the air is supplied into the room through the air supply port (22).

  Further, in the humidity control unit (10) during the simple ventilation operation, room air is taken into the casing (11) from the indoor air suction port (23). The room air that has flowed into the inside air passage (32) through the inside air inlet (23) flows from the second bypass passage (82) through the second bypass damper (84) into the exhaust fan chamber (35). Then, it is discharged to the outside through the exhaust port (21).

  In the humidity control system of the present embodiment, the multiple humidity control units (10) perform humidity control in each room while selectively performing such three operations.

<Humidity control unit capacity control>
The capability control of the humidity control system will be described with reference to FIG. The humidity control capacity of the humidity control unit (10) refers to the humidity control capacity of the adsorption heat exchanger (51, 52) of the humidity control circuit (50) of the humidity control unit (10).

  The target temperature determination unit (3) in the sub-controller (1a) on the humidity control side is input from the target humidity Ms input from each target humidity input unit (2) and the outside air humidity sensor (not shown). A target value Tes of the evaporation temperature is calculated based on the outside air humidity Mo. Here, the target temperature determination unit (3) has a correlation equation in which the relationship among the target humidity Ms, the outside air humidity Mo, and the target value Tes is determined in advance. Then, based on this correlation equation, the target value Tes is calculated from the target humidity Ms and the outside air humidity Mo.

  This calculation is performed every unit time while the four-way switching valve (54) of each humidity control circuit (50) is switched to the first state or the second state. And among the several target value Tes calculated from the time of the switching to the present, the smallest target value Tes is output to the set temperature determination part (7) in the sub controller (1b) on the compressor side. .

  In the set temperature determination unit (7), after calculating the smallest target value Tes among the target values Tes input from each target temperature determination unit (3), the calculated value is set as the set value Tem and the set temperature correction is performed. Output to the unit (8) and the set superheat degree determination unit (4) and the second expansion valve control unit (5b) in the sub controller (1a) on the humidity control side.

  The set temperature correction unit (8) includes a capacity determination unit (8a) and a set temperature change unit (8b), and the indoor humidity Mi and the outlet superheat degree SH fed back from the humidity control units (10), The set value Tem is changed as necessary from the target humidity Ms input from each target humidity input section (2). That is, the set value Tem calculated from the target humidity Ms and the outside air humidity Mo is corrected based on the indoor humidity Mi.

  Specifically, the capacity determination unit (8a) determines whether the capacity is increased or decreased for each humidity control unit (10), and outputs a signal corresponding to the determination to the set temperature change unit (8b). It is configured as follows.

  The condition for the capability determination unit (8a) to determine that the humidity control unit (10) is increased in capability will be described. When the humidity control unit (10) to be determined is in the dehumidification ventilation operation or the humidification ventilation operation, the speed at which the current humidity Mi approaches the target humidity Ms is slower than a predetermined value, and the low-pressure side adsorption heat exchanger ( 51, 52) When the outlet superheat degree is smaller than the lower limit value, it is determined that the capacity is increased. That is, when the humidity control capacity of the humidity control unit (10) is smaller than the humidity control load, it is determined that the capacity is increased. The lower limit value of the outlet superheat degree is set to such a small value that liquid refrigerant is not sucked into the compressor (53).

  Next, conditions for the capability determination unit (8a) to determine that the humidity control unit (10) is capability down will be described. When the humidity control unit (10) to be determined is in the dehumidification ventilation operation or the humidification ventilation operation, the speed at which the current humidity Mi approaches the target humidity Ms is faster than a predetermined value, and the low-pressure side adsorption heat exchanger ( 51, 52) When the outlet superheat degree is larger than the upper limit value, it is determined that the capacity is reduced. That is, when the humidity control capacity of the humidity control unit (10) is larger than the humidity control load, it is determined that the capacity has been reduced. The upper limit value of the outlet superheat degree is set to a value close to the outlet superheat degree when the expansion valve (55) is at the minimum opening. In this way, the capacity increase and the capacity decrease are determined for each humidity control unit (10), and a signal corresponding to the determination is output to the set temperature changing unit (8b).

  In the set temperature changing unit (8b), when all the signals input from the capability determining unit (8a) are signals of capability down, the set value Tem input to the compressor control unit (9) Is outputted to the inverter (9). Further, when at least one of the signals input from the capacity determination unit (8a) is a signal for increasing the capacity, the setting value Tem input to the compressor control unit (9) is set to be lower than the present value. The value Tems is output to the inverter (9).

  In the inverter (9), a deviation e2 between the set value Tems output from the set temperature changing unit (8b) and the current value Te of the evaporation temperature fed back from the compressor unit (60a) is input. After e2 is converted to the operating frequency f of the compressor (53), it is input to the compressor unit (60a) to change the operating frequency f of the compressor (53).

  Specifically, when the current value Te is lower than the set value Tems, the operating frequency f is lower than the current value. Conversely, when the current value Te is higher than the set value Tems, the operating frequency f is higher than the current value. In this way, the operating frequency of the compressor (53) is controlled, and the evaporation temperature Te of the refrigerant circuit (20) approaches the set value Tems.

  The set superheat degree determination unit (4) receives the set value Tem input from the set temperature correction unit (8), the indoor humidity Mi fed back from each humidity control unit (10), and the outside air humidity sensor. After calculating the outlet superheat degree set value SHs on the basis of the outside air humidity Mo and the target humidity Ms input from the target humidity input section (2), the outlet superheat degree set value SHs is converted into the set superheat degree changing section ( Output to 6).

  Here, the set superheat degree determination unit (4) has a predetermined correlation between the target humidity Ms, the outside air humidity Mo, the indoor humidity Mi, the set value Tem, and the outlet superheat degree set value SHs. Has the formula. Then, based on the correlation equation, the outlet superheat degree set value SHs is calculated from the target humidity Ms, the outside air humidity Mo, the indoor humidity Mi, and the set value Tem.

  In the set superheat degree change unit (6), the set superheat degree is based on the target humidity Ms input from the target humidity input unit (2) and the indoor humidity Mi fed back from each humidity control unit (10). The outlet superheat setting value SHs input from the determination unit (4) is changed as necessary.

  Specifically, the case where the humidity control unit (10) is performing dehumidification ventilation operation will be described first. When the speed at which the current humidity Mi approaches the target humidity Ms is faster than a predetermined value, the set value SHs, which is set higher than the present value SHs, is set so that the current humidity Mi is not as low as possible than the target humidity Ms. It outputs to the said 1st expansion valve control part (5a). On the other hand, when the speed at which the current humidity Mi approaches the target humidity Ms is slower than the predetermined value, the dehumidifying capacity must be increased. Therefore, the set value SHs, which is lower than the set value SHs, is set to the first expansion. Output to the valve controller (5a).

  Next, the case where the humidity control unit (10) is performing humidification ventilation operation will be described. When the speed at which the current humidity Mi approaches the target humidity Ms is faster than a predetermined value, the set value SHs, which is set higher than the current value, is set so that the current humidity Mi is not as high as possible. It outputs to the said 1st expansion valve control part (5a). On the other hand, when the speed at which the current humidity Mi approaches the target humidity Ms is slower than the predetermined value, the humidification capacity must be increased. Therefore, the set value SHs, which is lower than the set value SHs, is set to the first expansion. Output to the valve controller (5a).

  In the second expansion valve control unit (5b), the evaporating temperature set value Tem output from the set temperature determining unit (7), the indoor humidity Mi fed back from the humidity control unit (10), and the outside air humidity sensor Based on the input outside air humidity Mo and the target humidity Ms input from the target humidity input unit (2), the opening value EVb1 of the expansion valve (55) is determined by feedforward control.

  Here, the second expansion valve control section (5b) is a correlation equation in which the relationship among the target humidity Ms, the outside air humidity Mo, the room humidity Mi, the set value Tem, and the opening value EVb1 is predetermined. have. Then, based on this correlation equation, the opening degree value EVb1 is calculated from the target humidity Ms, the outside air humidity Mo, the indoor humidity Mi, and the set value Tem.

  The opening value EVa1 of the expansion valve (55) output from the first expansion valve control unit (5a) and the opening of the expansion valve (55) output from the second expansion valve control unit (5b). An opening degree value EV based on the degree value EVb1 is input to the humidity control unit (10) to change the opening degree of the expansion valve (55).

  Thus, the operating capacity of the compressor (53) and the opening of each expansion valve (55) are adjusted, and the indoor humidity Mi approaches the target humidity Ms.

-Effect of the embodiment-
According to the present embodiment, the set value Tem is determined based on the optimum target value Tes determined according to the operating condition of the humidity control unit (10). As a result, it is possible to adjust the humidity control capacity optimally without making each of the humidity control units (10) thermo-off as much as possible.

  Moreover, according to this embodiment, by setting the smallest target value Tes among all the target values Tes input from the target temperature determination unit (3) to the set value Tem, all the humidity control units In (10), it is possible to adjust the optimum humidity adjustment capability while making it difficult to cause a shortage of humidity adjustment capability within a range where thermo-off is not possible.

  Moreover, according to this embodiment, the said capacity | capacitance determination part (8a) determines capacity | capacitance increase or capacity | capacitance down as needed for every humidity control unit (10), Based on the determination result, the said compressor The set value Tem input to the control unit (9) can be changed. Thereby, the said setting value Tem can be optimally set according to the capability change of each humidity control unit (10).

  Further, according to the present embodiment, when it is determined that the humidity control capability is too slight in all the humidity control units (10), the set temperature correction unit (8) sets the set value Tem from the current value. The humidity control capacity of all the humidity control units (10) can be reduced uniformly within a range where the humidity control capacity is not insufficient. Thereby, since the humidity control capability of all the humidity control units (10) approaches the humidity control load, it is possible to adjust the optimal humidity control capability without thermo-off each of the humidity control units (10) as much as possible.

  Further, according to the present embodiment, when it is determined that the humidity control capability is insufficient in at least one humidity control unit (10), the set temperature correction unit (8) sets the set value Tem from the present time. The humidity control capacity of each humidity control unit (10) can be increased uniformly within a range where the humidity control capacity is not so low. Thereby, in all the humidity control units (10), it is possible to optimally adjust the humidity control capability without causing a shortage of the humidity control capability.

  Further, according to the present embodiment, the humidity control capacity of each humidity control unit (10) is controlled by the capacity control of the compressor (53) and the opening degree control of the expansion valve (55) based on the outlet superheat degree SH. The humidity control capability of each humidity control unit (10) can be made closer to the humidity control load. This makes it possible to adjust the humidity control capacity more optimally without turning off the humidity control units (10) as much as possible.

  In addition, according to the present embodiment, the second expansion valve control unit (5b) can adjust the opening of the expansion valve (55) with a predicted opening, and each humidity control unit (10) It is possible to reduce the fluctuation when adjusting the humidity control ability of the. Thereby, optimal humidity control capability can be adjusted in a state where each humidity control unit (10) is as stable as possible.

  Further, according to the present embodiment, the set value SHs input to the first expansion valve control unit (5a) by the set superheat degree changing unit (6) so that the current humidity Mi approaches the target humidity Ms. Can be changed. Thereby, the humidity control capability of each humidity control unit (10) can be made closer to the humidity control load.

<< Other Embodiments >>
About the said embodiment, it is good also as the following structures.

  In the present embodiment, the target temperature determination unit (3) calculates the target value Tes of the evaporation temperature based on the target humidity Ms and the outside air humidity Mo. However, the present invention is not limited to this, and the target humidity Ms and the outside air are calculated. The target value Tes of the evaporation temperature may be calculated based on the humidity Mo and the current humidity Mi.

  In the present embodiment, the target temperature determination unit (3), the set superheat degree determination unit (4), and the second expansion valve control unit (5b) have a correlation equation, but are not limited thereto. A map created based on the correlation equation may be used. In addition, if the said map is used, unlike a numerical formula, a complicated calculation can be avoided.

  In the present embodiment, the set superheat degree determination unit (4) calculates the outlet superheat degree set value SHs based on the set value Tem of the evaporation temperature, the indoor humidity Mi, the outside air humidity Mo, and the target humidity Ms. However, the present invention is not limited to this, and the outlet superheat degree set value SHs may be calculated based on one of the current humidity Mi and the outdoor outside humidity Mo, the set value Tem of the evaporation temperature, and the target humidity Ms.

  In the present embodiment, the second expansion valve control unit (5b) adjusts the opening of the electric expansion valve (55) based on the set value Tem of the evaporation temperature, the indoor humidity Mi, the outside air humidity Mo, and the target humidity Ms. However, the present invention is not limited to this, and the opening degree of the electric expansion valve (55) is adjusted based on one of the current humidity Mi and the outdoor outdoor humidity Mo, the set value Tem of the evaporation temperature, and the target humidity Ms. Also good.

  According to the present embodiment, the case where all the humidity control units (10) are performing the dehumidification ventilation operation or the humidification ventilation operation has been described. The thing which carries out ventilation operation may be mixed.

  In addition, the above embodiment is an essentially preferable illustration, Comprising: It does not intend restrict | limiting the range of this invention, its application thing, or its use.

  As described above, the present invention is useful for a humidity control system that adjusts the humidity of air with an adsorption heat exchanger connected to a refrigerant circuit.

It is a schematic plan view, a right side view, and a left side view showing a humidity control unit with a part thereof omitted. It is a piping system diagram showing the composition of a refrigerant circuit, and is a case where all the four way switching valves are set to the 1st operation. It is a piping system diagram showing the composition of a refrigerant circuit, and is a case where all the four way switching valves are set to the 2nd operation. It is a schematic plan view, a right side view, and a left side view of the humidity control unit showing the air flow in the first operation of the dehumidifying ventilation operation. It is the schematic top view of the humidity control unit which shows the flow of the air in 2nd operation | movement of a dehumidification ventilation driving | operation, a right view, and a left view. It is a schematic plan view, a right side view, and a left side view of a humidity control unit showing the air flow in the first operation of the humidification ventilation operation. It is the schematic top view of the humidity control unit which shows the flow of the air in 2nd operation | movement of humidification ventilation driving | operation, a right view, and a left view. It is a schematic plan view, a right side view, and a left side view of a humidity control unit showing a flow of air in simple ventilation operation. It is a block diagram of a main controller.

Explanation of symbols

1 Main controller (control means)
2 Target humidity input section
3 Target temperature determination unit
4 Setting superheat determination part
5a First expansion valve controller
5b Second expansion valve controller
6 Setting superheat degree change section
7 Set temperature determining section
8 Set temperature compensation
8a Ability judgment unit
8b Set temperature change section
9 Inverter (Compressor control unit)
10 Humidity control unit

Claims (8)

The first adsorption heat exchanger (51) carrying the adsorbent, the expansion valve (55), and the second carrying the adsorbent to the heat source circuit (60) connected to the variable capacity compressor (53). A refrigerant circuit (20) in which a plurality of humidity control circuits (50) connected to the adsorption heat exchanger (52) are connected in parallel to perform a vapor compression refrigeration cycle;
The high pressure side of the heat source circuit (60) and one end of the first adsorption heat exchanger (51) are connected, and the low pressure side of the heat source circuit (60) and one end of the second adsorption heat exchanger (52) are connected. The first state to be connected to the high pressure side of the heat source circuit (60) and one end of the second adsorption heat exchanger (52) to connect the low pressure side of the heat source circuit (60) to the first adsorption heat exchanger (51). A switching mechanism (54) switchable to a second state connecting one end of the
By switching the switching mechanism (54), the air brought into contact with the adsorbent of the adsorption heat exchanger (51, 52) connected to the high pressure side or the low pressure side of the heat source circuit (60) is supplied to each adsorption heat exchanger. A humidity control system comprising a control means (1) for controlling the humidity control operation to be sent to the target space corresponding to (51, 52),
The control means (1) includes at least one of the current humidity Mi of each target space and the outdoor outdoor humidity Mo so that the current humidity Mi of the target space of each humidity control circuit (50) approaches the target humidity Ms. And a target temperature Tes of the evaporating temperature of the refrigerant circuit (20) determined based on the target humidity Ms of each target space is output for each humidity control circuit (50) corresponding to each target space. The decision part (3),
A set temperature determining unit (7) that outputs the set value Tem of the evaporation temperature determined based on each target value Tes input from the target temperature determining unit (3);
A compressor control unit (9) that controls the operating capacity of the compressor (53) so that the current value Te of the evaporation temperature of the refrigerant circuit (20) approaches the set value Tem input from the set temperature determining unit (7). ) And a humidity control system. In claim 1,
The set temperature determining unit (7) sets the smallest target value Tes among all the target values Tes input from the target temperature determining unit (3) as the set value Tem to the compressor control unit (9). A humidity control system configured to output. In claim 1 or 2,
The control means (1) includes the current humidity Mi of the target space corresponding to the humidity control circuit (50), the target humidity Ms of the target space, and the first and first of the humidity control circuit (50). 2 Based on the current value SH of the outlet superheat degree of the adsorption heat exchanger (51, 52) connected to the low pressure side of the heat source circuit (60) among the two adsorption heat exchangers (51, 52), A capability determination unit (8a) that determines a capability increase or a capability decrease for each wet circuit (50) and outputs a signal corresponding to the determination,
A set temperature changing unit (8b) is provided for increasing or decreasing the set value Tem input to the compressor control unit (9) from the current level based on a signal input from the capacity determination unit (8a). A humidity control system characterized by that. In claim 3,
The set temperature changing unit (8b) is configured such that the compressor control unit (8b), when all the signals for each humidity control circuit (50) input from the capability determining unit (8a) are signals indicating a capability decrease, 9. A humidity control system configured to make the set value Tem input to 9) higher than the present value. In claim 3 or 4,
The set temperature changing section (8b) is a set value input to the compressor control section (9) when at least one of the signals input from the capacity determining section (8a) is a capacity up signal. A humidity control system characterized by being configured to lower Tem than at present. In any one of claims 1 to 5,
The control means (1) includes at least one of the current humidity Mi of the target space and the outdoor outdoor humidity Mo, the target humidity Ms of the target space, and the set value input from the set temperature determination unit (7). Based on Tem, the adsorption connected to the low pressure side of the heat source circuit (60) among the first and second adsorption heat exchangers (51, 52) of the humidity control circuit (50) corresponding to the target space A set superheat degree determining section (4) for determining and outputting a set value SHs of the outlet superheat degree of the heat exchanger (51, 52);
The adsorption heat exchange so that the current value SH of the outlet superheat degree approaches the set value SHs of the outlet superheat degree of the adsorption heat exchanger (51, 52) input from the set superheat degree determining unit (4). And a first expansion valve control section (5a) for controlling the opening degree of the expansion valve (55) corresponding to the vessel (51, 52). In claim 6,
In the control means (1), at least one of the current humidity Mi of the target space and the outdoor outdoor humidity Mo, the target humidity Ms of the target space, and the set value input from the set temperature determination unit (7) Based on Tem, the adsorption connected to the low pressure side of the heat source circuit (60) among the first and second adsorption heat exchangers (51, 52) of the humidity control circuit (50) corresponding to the target space The expansion valve (55) corresponding to the adsorption heat exchanger (51, 52) is opened so that the current value SH of the outlet superheat degree of the heat exchanger (51, 52) becomes the set value SHs of the outlet superheat degree. A humidity control system comprising a second expansion valve control unit (5b) for adjusting the degree by feedforward control. In claim 6,
The control means (1) changes the set value SHs input to the first expansion valve control unit (5a) corresponding to the target space so that the current humidity Mi of the target space approaches the target humidity Ms. A humidity control system provided with a setting superheat degree changing section (6).

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