WO2007004557A1

WO2007004557A1 - Ventilation device

Info

Publication number: WO2007004557A1
Application number: PCT/JP2006/313091
Authority: WO
Inventors: Nobuki Matsui; Yoshinori Narikawa; Tomohiro Yabu
Original assignee: Daikin Industries, Ltd.
Priority date: 2005-06-30
Filing date: 2006-06-30
Publication date: 2007-01-11
Also published as: JP2007010229A

Abstract

A ventilation device (10) is configured so that it can perform a normal operation for performing ventilation in a room while controlling the operation state and a filter state detection operation for detecting a clogged state of filter members (27, 28) by filter state detection means (63) while maintaining a constant operation state. In the filter state detection operation, the clogged state of the filter members (27, 28) can be detected without considering the operation state of the ventilation device (10).

Description

Ventilation equipment

Technical field

TECHNICAL FIELD [0001] The present invention relates to a ventilator that adjusts indoor humidity together with indoor ventilation.

Conventionally, ventilators that exchange room air and outdoor air are known.

[0003] For example, Patent Document 1 discloses a ventilator that discharges indoor air to the outside at the same time as the outdoor air taken in is adjusted to humidity and supplied to the room. This ventilation device is provided with a refrigerant circuit to which a compressor, an expansion valve, and an adsorption heat exchanger carrying an adsorbent are connected. This ventilation device is configured to adjust the humidity of the air in contact with the adsorbent by heating or cooling the adsorption heat exchanger with the refrigerant in the refrigerant circuit. In this ventilation device, for example, a target humidity is set by a user, and the operation state (for example, the operation frequency of the compressor) is controlled so that the room approaches the target humidity.

Patent Document 1: Japanese Patent Application Laid-Open No. 2004-294048

Disclosure of the invention

Problems to be solved by the invention

[0004] By the way, a ventilation device is often provided with a filter member in order to clean the taken-in air. Filter members need to be cleaned and replaced as clogging progresses. Therefore, since it is convenient to be able to inform the timing of cleaning and replacement, it may be possible to judge the timing of cleaning and replacement from the state of air supplied from outside the room. However, when the operating state of the ventilation device changes, it becomes difficult to accurately detect the clogged state of the filter member.

[0005] In other words, in this type of ventilator, when the operating state (for example, the operating frequency of the compressor) is changed, the state of air supplied from the outside to the room (temperature, humidity, etc.) is changed accordingly. Change. When detecting the clogged state of the filter member based on the change in the air condition, the operating condition of the ventilator is selected from the change in the air condition. There is a problem that it is difficult to accurately detect the clogged state of the filter member because it must be detected in consideration of the amount caused by the change.

[0006] The present invention has been made in view of such points, and an object of the present invention is to detect a clogging state of a filter member in a ventilation device that adjusts indoor humidity as well as indoor ventilation. It is to improve accuracy.

Means for solving the problem

[0007] The first invention includes an adsorbing member (51, 52) carrying an adsorbent, and a heat source means (50) for at least heating the adsorbent of the adsorbing member (51, 52). Targeting a ventilator (10) that adjusts the humidity by bringing the outdoor air taken into contact with the adsorbent of the adsorbing member (51, 52) and supplies it to the room, and at the same time exhausts the air taken in outside the room. To do. Then, the filter member (27, 28) for cleaning the taken outdoor air, and the filter for detecting the clogging state of the filter member (27, 28) based on the state of the air supplied from the outside to the room. A state detection means (63), and the normal operation for ventilating the room while controlling the operation state of the ventilator (10) and the operation state of the ventilator (10) are maintained constant. A filter state detecting operation in which the filter state detecting means (63) detects the clogged state of the filter member (27, 28) can be executed.

[0008] A second invention includes a refrigerant circuit (50) connected to an adsorption heat exchanger (51, 52) carrying an adsorbent to perform a refrigeration cycle, and the taken outdoor air is transferred to the refrigerant circuit (50). Targets ventilation equipment (10) that adjusts humidity by bringing it into contact with the adsorbent of the adsorption heat exchanger (51, 52) heated or cooled with the refrigerant of And Then, the clogged state of the filter member (27, 28) is detected based on the filter member (27, 28) that cleans the taken outdoor air and the state of the air supplied from the outside to the room. A filter state detecting means (63), and controlling the operation state of the ventilator (10) while controlling the operation state of the room, and maintaining the operation state of the ventilator (10) constant. A filter state detecting operation for causing the filter state detecting means (63) to detect a clogged state of the filter member (27, 28) is executable.

[0009] A third invention is the first or second invention, wherein the filter state detection means (63) includes a state of air supplied from the outside to the room during the filter state detection operation, and the filter In the initial state of the filter member (27, 28), the clogged state of the filter member (27, 28) is detected based on the state of air supplied from the outside to the room.

[0010] In a fourth aspect based on the third aspect, the filter state detecting means (63) passes through the filter member (27, 28) based on the state of air supplied from the outside to the inside of the room. An air volume estimation unit (64) for estimating the air volume of air is provided, and the air volume estimated by the air volume estimation unit (64) during the filter state detection operation and the initial state of the filter member (27, 28) Then, the clogging state of the filter member (27, 28) is detected based on the air volume estimated by the air volume estimating unit (64).

[0011] A fifth invention is the first or second invention, further comprising an air supply fan (26) for taking in outdoor air, and in the filter state detection operation, the air supply fan (26) is rotated. While the first detection operation and the second detection operation are performed to fix the speeds to different values, the filter state detection means (63) is controlled based on the state of air supplied from the outside to the room. An air volume estimation unit (64) for estimating the air volume of the air passing through the filter member (27, 28) is provided, and the air volume estimated by the air volume estimation unit (64) during the first detection operation and the second detection operation are in progress. Then, the clogging state of the filter member (27, 28) is detected based on the difference from the air volume estimated by the air volume estimating unit (64).

[0012] A sixth aspect of the invention is any one of the first to fifth aspects of the invention, wherein the filter state detection operation is executed at a predetermined time.

[0013] One action

In the first aspect of the invention, the normal operation and the filter state detection operation can be performed. When the filter state detection means (63) detects the clogged state of the filter member (27, 28), the filter operation is detected. Perform state detection operation. In normal operation, the heat source means, etc. are controlled as the operating state of the ventilator (10) to adjust the state of the air supplied from the outside to the room. In the filter state detection operation, the operation state of the ventilation device (10) is kept constant. Therefore, the influence of the operation state of the ventilator (10) is removed from the change in the state of the air supplied from the outdoor to the indoor in the filter state detection operation.

[0014] In the second invention, as in the first invention, the normal operation and the filter state detection operation can be performed, and the filter member (27, 28) is connected to the filter state detection means (63). Clogged When detecting the current state, the filter state detection operation is performed. In normal operation, the state of the refrigeration cycle of the refrigerant circuit is controlled as the operating state of the ventilator (10), and the state of air supplied from the outside to the room is adjusted. In the filter state detection operation, the operation state of the ventilation device (10) is kept constant. Therefore, the influence of the operating state of the ventilator (10) is removed from the change in the state of the air supplied from the outdoor to the indoor in the filter state detection operation.

[0015] In the third invention, the filter state detecting means (63) stores the state of the air supplied from the outdoor to the indoor in the initial state of the filter member (27, 28). In addition, the initial state of the filter member (27, 28) is a state in which dirt is not attached immediately after the ventilation device (10) is installed or immediately after the filter member (27, 28) is cleaned or replaced. . This filter state detection means (63) detects the state of air supplied from the outside to the room during the filter state detection operation, and changes the state of the air to the initial state of the filter member (27, 28) from the outside to the room. Compared with the state of air supplied to the filter, the clogged state of the filter members (27, 28) is detected based on the change in the state of the air.

[0016] In the fourth invention, the air volume estimating unit (64) of the filter state detecting means (63) force The air volume of the air passing through the filter member (27, 28) based on the state of the air supplied from the outside to the inside of the room Guess. The filter state detecting means (63) stores the air volume estimated by the air volume estimating unit (64) in the initial state of the filter member (27, 28). The filter state detection means (63) then detects the air volume estimated by the air volume estimation unit (64) during the filter state detection operation and the air volume estimated by the air volume estimation unit (64) in the initial state of the filter members (27, 28). Compared to the above, the clogged state of the filter member (27, 28) is detected based on the change in the air volume. In the filter state detection operation, the operation state of the ventilator (10) is kept constant, and the operation state of the ventilator (10) is determined from the change in the state of the air supplied from the outside to the room in the filter state detection operation. Since the influence of the state is removed, the air volume of the air passing through the filter member (27, 28) can be estimated easily and accurately.

[0017] In the fifth invention, the air volume estimation unit (64) passes through the filter member (27, 28) in each of the first detection operation and the second detection operation during the filter state detection operation. Estimate the amount of air flow. Here, when the clogging of the filter member (27, 28) proceeds, the filter member (27, 28) The air resistance of 28) increases, and the fan characteristics indicated by the relationship between the rotation speed of the supply fan (26) and the air volume change. Specifically, when the air resistance of the filter members (27, 28) increases, the air volume does not increase so much even if the rotational speed of the supply fan (26) is increased. For this reason, the difference between the air volume estimated by the air volume estimation unit (64) during the first detection operation and the air volume estimated by the air volume estimation unit (64) during the second detection operation is reduced. Therefore, the differential force between the air volume estimated by the air volume estimation unit (64) during the first detection operation and the air volume estimated by the air volume estimation unit (64) during the second detection operation is the filter member (27, 28) The state of clogging is estimated.

[0018] In the sixth invention, indoor ventilation is performed in a normal operation, and when a predetermined time is reached, the normal operation is switched to the filter state detection operation to detect the clogged state of the filter members (27, 28). Except during the filter state detection operation, the indoor humidity is adjusted along with the indoor ventilation in normal operation.

The invention's effect

[0019] In the present invention, the operating state of the ventilator (10) is kept constant so that the clogged state of the filter member (27, 28) can be detected without considering the operating state of the ventilator (10). The filter state detection operation that is held at is performed. That is, by performing the filter state detection operation, it is possible to detect the clogged state of the filter members (27, 28) in consideration of only the change in the state of the air supplied from the outdoor to the indoor. Yes. Therefore, the detection of the clogged state of the filter members (27, 28) is simplified and errors are less likely to occur, so that the detection accuracy of the clogged state of the filter members (27, 28) can be improved.

[0020] Further, in the sixth aspect of the invention, indoor humidity adjustment is performed together with indoor ventilation in normal operation except during the execution of the filter state detection operation. Therefore, for example, if the filter state detection operation is performed during the time when there is no occupant, such as at night, it is not necessary to adjust the humidity in the room during that time, so the filter member (27, 28) is not clogged. The state can be detected without impairing the comfort of the occupants.

Brief Description of Drawings

FIG. 1 is a perspective view showing a configuration of a ventilator according to an embodiment.

FIG. 2 is a configuration diagram showing a schematic configuration of the ventilator according to the embodiment in a plan view, a right side view, and a left side view. FIG. 3 is a piping system diagram showing the configuration of the refrigerant circuit of the embodiment, where (A) shows the operation during the first operation, and (B) shows the operation during the second operation. The operation is shown.

FIG. 4 is a schematic perspective view of an adsorption heat exchanger.

[FIG. 5] FIG. 5 is a schematic configuration diagram of a ventilator showing an air flow during the first operation in the dehumidifying operation.

[FIG. 6] FIG. 6 is a schematic configuration diagram of a ventilator showing an air flow during the second operation in the dehumidifying operation.

[FIG. 7] FIG. 7 is a schematic configuration diagram of a ventilator showing an air flow during the first operation in the humidifying operation.

[FIG. 8] FIG. 8 is a schematic configuration diagram of a ventilator showing an air flow during the second operation in the humidifying operation.

FIG. 9 is a flowchart showing a flow of a filter state detection operation in the embodiment.

FIG. 10 is a graph showing the relationship between the air volume Q of the air passing through the outside air filter and the external static pressure P in Modification 3 of the embodiment.

[FIG. 11] FIG. 11 is a schematic configuration diagram of a ventilator according to a fifth modification of the other embodiment, in which (A) shows the operation during the first operation, and (B) shows the second operation. It shows the operation during operation.

FIG. 12 is a schematic perspective view of a humidity control unit in a sixth modification of the other embodiment.

Explanation of symbols

10 Ventilator

27 Outside air filter (filter member)

28 Inside air filter (filter member)

50 Refrigerant circuit (heat source means)

51 First adsorption heat exchanger (Adsorption member)

52 Second adsorption heat exchanger (Adsorption member)

63 Filter status detector (Filter status detector) 64 Airflow estimation unit

BEST MODE FOR CARRYING OUT THE INVENTION

[0023] An embodiment of the present invention will be described. The ventilator (10) of the present embodiment adjusts the humidity of the room together with the ventilation of the room. At the same time, it adjusts the humidity of the taken outdoor air (OA) and supplies it to the room. RA) is discharged outside the room.

[0024] The ventilation device (10) performs normal operation for controlling the operation state of the ventilation device (10) so as to achieve indoor humidity desired by the user while performing indoor ventilation, and while performing indoor ventilation. A filter state detection operation for detecting a clogged state of the outside air filter (27), which will be described later, can be executed while the operation state of the ventilation device (10) is kept constant. In this ventilator (10), the room is ventilated throughout the day, and the filter state detection operation is performed at a predetermined night time (for example, midnight).

The ventilation device (10) will be described with reference to FIGS. Unless otherwise specified, “upper”, “lower”, “left”, “right”, “front”, “rear”, “front”, and “back” used in the description here refer to the ventilation device (10) on the front side. It means the direction when seen from.

[0026] The ventilation device (10) includes a casing (11). A refrigerant circuit (50) is accommodated in the casing (11). The refrigerant circuit (50) includes a first adsorption heat exchanger (51), a second adsorption heat exchanger (52), a compressor (53), a four-way switching valve (54), and an electric expansion valve (55). It is connected. Details of the refrigerant circuit (50) will be described later.

[0027] The casing (11) is formed in a rectangular parallelepiped shape that is slightly flat and relatively low in height. In this casing (11), the front panel (12) force is placed on the left front side in Fig. 1 and the rear panel (13) is erected on the right rear side in Fig. 1, from the left front side to the right back side in the same figure. Directional force, length in the opposite direction and right frontal force The depth in the direction of the leftward force is almost equal.

[0028] In the front panel (12) of the casing (11), the exhaust port (21) is opened to the left and the air supply port (22) is opened to the right. At the center of the rear panel (13) of the casing (11), an outside air inlet (24) is opened at a position lower than the outside air inlet (23) force. [0029] The internal space of the casing (11) is divided into a space having a relatively small volume on the front panel (12) side and a space having a relatively large volume on the back panel (13) side. RU

[0030] The space on the front panel (12) side in the casing (11) is cut into two left and right spaces. In the left and right spaces, the left space constitutes an exhaust fan chamber (35), and the right space constitutes an air supply fan chamber (36). The exhaust fan chamber (35) communicates with the outdoor space via the exhaust port (21). The exhaust fan chamber (35) accommodates an exhaust fan (25), and the outlet of the exhaust fan (25) is connected to the exhaust port (21). On the other hand, the air supply fan chamber (36) communicates with the indoor space via the air supply port (22). The supply fan chamber (36) accommodates the supply fan (26), and the outlet of the supply fan (26) is connected to the supply port (22). The air supply fan chamber (36) also houses a compressor (53).

[0031] On the other hand, the space on the back panel (13) side in the casing (11) is separated by the first partition plate (16) and the second partition plate (17) standing up and down in the casing (11). It is divided into two spaces. These partition plates (16, 17) extend in the left-right direction of the casing (11). The first cutting plate (16) is arranged near the back of the casing (11), and the second partition plate (17) is arranged near the front of the casing (11).

[0032] In the casing (11), the space behind the first partition plate (16) is partitioned into two upper and lower spaces, and the upper space defines the outside air flow path (32) and the lower space. Constitutes the inside air flow path (34), respectively. The outside air flow path (32) communicates with the outdoor space via the outside air inlet (23). The outside air channel (32) is provided with an outside air filter (27) which is a filter member extending left and right and dividing the channel (32) into the front and rear. The room air side channel (34) communicates with the room via the room air inlet (24). The room air side flow path (34) is provided with a room air side filter (28) which is a filter member extending left and right and dividing the flow path (34) into the front and back.

[0033] On the other hand, the space in front of the second partition plate (17) is partitioned into two upper and lower spaces, the upper space is the exhaust side flow path (31), and the lower space is the air supply side flow path. (33) is configured. The exhaust side flow path (31) communicates with the exhaust fan chamber (35). The supply side flow path (33) communicates with the supply fan chamber (36).

[0034] The space between the first partition plate (16) and the second partition plate (17) is further separated by the central partition plate (18). It is divided into two spaces. The space on the right side of the central partition plate (18) constitutes the first heat exchanger chamber (37), and the space on the left side constitutes the second heat exchanger chamber (38). The first heat exchanger chamber (37) accommodates the first adsorption heat exchanger (51), and the second heat exchanger chamber (38) accommodates the second adsorption heat exchanger (52). These two adsorption heat exchangers (51, 52) are arranged so as to cross the heat exchanger chamber (37, 38) in which they are accommodated in the left-right direction.

The first partition plate (16) is provided with four openable dampers (41 to 44). Specifically, in the first partition plate (16), the first damper (41) is on the upper right side, the second damper (42) is on the upper left side, and the third damper (43) is on the lower right side. A fourth damper (44) is attached to the lower left side. When the first damper (41) is opened, the outside air flow path (32) and the first heat exchanger chamber (37) communicate with each other. When the second damper (42) is opened, the outside air flow path (32) and the second heat exchanger chamber (38) communicate with each other. When the third damper (43) is opened, the inside air flow path (34) and the first heat exchanger chamber (37) communicate with each other. When the fourth damper (44) is opened, the inside air flow path (34) and the second heat exchanger chamber (38) communicate with each other.

[0036] The second partition plate (17) is provided with four open / close dampers (45 to 48). Specifically, the second partition plate (17) has a fifth damper (45) on the upper right side, a sixth damper (46) on the upper left side, a seventh damper (47) on the lower right side, and a left damper on the left side. The eighth dampers (48) are attached to the bottom. When the fifth damper (45) is opened, the exhaust side flow path (31) and the first heat exchanger chamber (37) communicate with each other. When the sixth damper (46) is opened, the exhaust side flow path (31) and the second heat exchanger chamber (38) communicate with each other. When the seventh damper (47) is opened, the air supply side flow path (33) and the first heat exchanger chamber (37) communicate with each other. When the 8th damper (48) is opened, the air supply side flow path (33) and the second heat exchanger chamber (38) communicate with each other.

[0037] The ventilator (10) includes an outdoor air temperature sensor (65a) and an outdoor air humidity sensor (65b) that measure the temperature and humidity of the outdoor air (OA) taken in from the outdoor by the ventilator (10). ) Is provided on the rear side of the outdoor air filter (27) of the outdoor air flow path (32). In addition, the supply air temperature sensor (66a) and supply air humidity sensor (66b), which measure the temperature and humidity of the supply air (SA) supplied from the ventilation device (10) to the room, respectively, ). Also, the temperature and humidity of the indoor air (RA) taken in from the room by the ventilator (10) are adjusted. An inside air temperature sensor (67a) and an inside air humidity sensor (67b) for measuring each are provided on the rear side of the inside air side filter (28) of the inside air side channel (34). The detection values of these sensors (65, 66, 67) are transmitted to the control unit (60).

The refrigerant circuit (50) will be described with reference to FIG.

[0039] The refrigerant circuit (50) includes a first adsorption heat exchanger (51), a second adsorption heat exchanger (52), a compressor (53), a four-way switching valve (54), and an electric expansion valve ( 55) is a closed circuit. The refrigerant circuit (50) performs a vapor compression refrigeration cycle by circulating the filled refrigerant.

In the refrigerant circuit (50), the compressor (53) has a discharge side connected to the first port of the four-way switching valve (54) and a suction side connected to the second port of the four-way switching valve (54). It is connected. One end of the first adsorption heat exchanger (51) is connected to the third port of the four-way switching valve (54). The other end of the first adsorption heat exchanger (51) is connected to one end of the second adsorption heat exchanger (52) via the electric expansion valve (55). The other end of the second adsorption heat exchanger (52) is connected to the fourth port of the four-way switching valve (54).

[0041] 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 (the state shown in FIG. 3A). Can be switched to the second state (the state shown in Fig. 3 (B)) in which the first port communicates with the fourth port and the second port communicates with the third port. .

[0042] As shown in FIG. 4, each of the first adsorption heat exchanger (51) and the second adsorption heat exchanger (52) is constituted by a cross-fin type fin 'and' tube heat exchanger. . These adsorption heat exchangers (51, 52) are provided with copper heat transfer tubes (58) and aluminum fins (57). The plurality of fins (57) provided in the adsorption heat exchanger (51, 52) are each formed in a rectangular plate shape and arranged at regular intervals. The heat transfer tube (58) is provided so as to penetrate each fin (57).

[0043] In each of the adsorption heat exchangers (51, 52), an adsorbent is supported on the surface of each fin (57), and air passing between the fins (57) is supported on the fin (57). In contact with the adsorbent formed. As this adsorbent, those capable of adsorbing water vapor in the air, such as zeolite, silica gel, activated carbon, and organic high molecular weight material having a hydrophilic functional group, can be used. [0044] Configuration of control unit>

The control unit (60) of the ventilation device (10) includes a fan control unit (61) for controlling the air volume of the exhaust fan (25) and the air supply fan (26), and a refrigerant as an operating state of the ventilation device (10). A humidity control unit (62) for controlling the state of the refrigeration cycle of the circuit (50), a filter state detecting unit (63) which is a filter state detecting means for detecting a clogged state of the outside air filter (27), Force S is provided. The filter status detection unit (63) includes an outdoor air side filter based on the absolute humidity of the outdoor air (OA) and the absolute humidity of the supply air (SA), which is the state of the air supplied from the outdoor to the indoor. An air volume estimating unit (64) for estimating the air volume Q of air passing through (27) is provided.

[0045] The fan control unit (61) has a setting fan tap that can adjust the air volume of the supply fan (26) and the exhaust fan (25) in three levels (eg, “large”, “medium”, and “small”). Is provided. The fan motor output of the supply fan (26) and the exhaust fan (25) is determined by the setting state of the setting fan tap. That is, when the setting fan tap of the fan (26, 27) is in a setting state (for example, “large”), the output of the fan motor is fixed to a predetermined value corresponding to the setting state. The rotational speed of the fan motor may be determined according to the setting state of the setting fan tap.

[0046] Although not shown, the humidity control unit (62) is provided with a humidity input unit for a user to input a desired room humidity and a temperature input unit for a user to input a desired room temperature. The

[0047] The humidity input unit is configured so that the desired indoor humidity can be selected from three levels of "low", "medium" and "high". In the humidity control unit (62), ranges of relative humidity corresponding to “low”, “medium”, and “high” are preset. When either “low”, “medium”, or “high” is input to the humidity input section, the humidity control section (62) targets the range of relative humidity corresponding to the input during normal operation. Set to humidity (eg 50% -60%). In addition, when the desired room temperature is input to the temperature input unit, the humidity control unit (62) sets the desired room temperature to the target temperature (for example, 25 ° C) during normal operation. To do.

[0048] Although not shown, the humidity control unit (62) includes a calculation unit. The computing unit calculates the absolute humidity at the temperature and humidity from the target humidity and target temperature. The humidity control unit (62) sets the absolute humidity calculated by the calculation unit to the target absolute humidity and adjusts the humidity control capacity of the ventilator (10) so that the indoor absolute humidity approaches the target absolute humidity. . [0049] The filter state detection unit (63) estimates the air volume Q of the air passing through the outside air filter (27) by the air volume estimation unit (64), and the outside air side based on the estimated air volume Q. Detects clogged filter (27).

[0050] The air volume estimation unit (64) stores a database function shown in Equation 1 in order to estimate the air volume Q of the air passing through the outside air filter (27).

[0051] Equation 1 3 & =] 0 &, (3) +1:

Xsa is the absolute humidity of the supply air (SA), Xoa is the absolute humidity of the outdoor air (〇A), Q is the air volume of the air passing through the outside air filter (27), and K is It represents the correction value considering the pressure loss due to the duct and the characteristics of the indoor space where the ventilator (10) is installed. Note that the air volume Q of the air passing through the outside air filter (27) can be considered to be substantially the same as the air volume supplied to the room by the air supply fan (26).

[0052] The database function of Equation 1 above is a function of the absolute humidity Xsa of the supply air (SA), the absolute humidity Xoa of the outdoor air (〇A), and the air volume Q of the air passing through the outdoor air filter (27). It is expressed as The database function of Equation 1 was created by creating the database function of Equation 2 when designing the ventilator ( ₁₀ ), and determining the value of K when installing the ventilator ( ₁₀ ).

[0053] Equation 2: 3 & =] 0 &, (3)

The database function of Equation 2 shows the operating frequency of the compressor (53) and the opening of the electric expansion valve (55) in the initial state of the outside air filter (27) (the state where there is no dirt attached). Supply air blown out from the inside air inlet (24) while changing the air volume of the air supply fan (26) and the state of the outdoor air (OA) taken in from the outside air inlet (23) while being held constant It is created by measuring the state of (SA). At that time, the absolute humidity Xoa of the outdoor air (OA) is calculated by the air volume estimation unit (64) from the detected values of the outdoor temperature sensor (65a) and the outdoor air humidity sensor (65b). The absolute humidity Xsa of the supply air (SA) is calculated by the air volume estimation unit (64) from the detection values of the supply air temperature sensor (66a) and supply air humidity sensor (66b).

[0054] When the air volume Q passing through the outside air filter (27) (that is, the air volume passing through the adsorption heat exchanger (51, 52)) changes, the adsorption heat exchanger (51, 52). The amount of humidity change in the air passing through changes. Specifically, in the case of dehumidification, if the air volume Q decreases, the heat of adsorption The amount of heat absorbed by the refrigerant in the exchanger (51, 52) decreases. Compared with a state where the air volume Q does not decrease, the temperature of the air to be dehumidified increases and the relative humidity decreases, so the amount of moisture adsorbed by the adsorbent decreases. In the case of humidification, if the air volume Q decreases, the amount of heat released from the refrigerant in the adsorption heat exchanger (51, 52) decreases. Compared with the state where the air volume Q does not decrease, the relative humidity increases as the temperature of the humidified air decreases, so the amount of moisture taken away by the adsorbent decreases. The database function of Equation 2 represents the relationship between the air volume Q of the air passing through the outside air filter (27) and the humidity change amount of the air passing through the adsorption heat exchanger (51, 52).

[0055] Further, the length and shape of the outside of the duct when the ventilation device (10) is installed are different for each installation place, and the pressure loss outside the duct is also different for each installation place. For this reason, even if the setting fan tap of the air supply fan (26) is the same, the air volume of the air supply fan (26) varies depending on the installation location. In this ventilation device (10), the temperature or humidity of the supply air (SA) to the room changes depending on the temperature and humidity of the room air (RA) taken from the room. Specifically, when the temperature or humidity of the indoor air (RA) taken in from the room by the ventilator (10) changes, the heat absorption amount of the refrigerant and the amount of moisture adsorbed by the adsorbent in the adsorption heat exchanger (51, 52). Changes, and the operating state of the ventilator (10) changes accordingly, so that the temperature or humidity of the supply air (SA) to the room changes. For this reason, K has been determined in consideration of the pressure loss due to outside and the characteristics of the indoor space where the ventilator (10) is installed to eliminate these effects.

[0056] The database function of Equation 1 is the air volume Q of the air passing through the outside air filter (27) in the installed state of the ventilation device (10) and the humidity change amount of the air passing through the adsorption heat exchanger (51, 52). Represents the relationship between and. According to the database function of Equation 1, the air volume Q of the air passing through the outside air filter (27) can be estimated from the absolute humidity Xoa of the outdoor air (OA) and the absolute humidity Xsa of the supply air (SA). .

[0057] The air flow estimation unit (64) sets the setting fan tap of the air supply fan (26) to, for example, "medium", and uses Equation 1 to determine the amount of air passing through the outside air filter (27) in the initial state. Estimate air volume Q (0). The air volume Q (0) is stored in the filter state detection unit (63).

The filter state detection unit (63) performs a filter state detection operation at a predetermined time every day. In the filter state detection operation, the air volume estimation unit (64) is empty through the outside air filter (27). Estimate the air volume Q. The filter state detection unit (63) compares the air volume Q estimated by the air volume estimation unit (64) during the filter state detection operation with the above air volume Q (0) to check the clogged state of the outside air filter (27). To detect. When the outside air filter (27) needs to be replaced, a “filter replacement sign” is displayed. Details of the operation of the filter state detector (63) will be described later.

[0059] One driving action

In the ventilation device (10) of the present embodiment, indoor humidity adjustment is performed together with indoor ventilation. In other words, the ventilator (10) performs a dehumidifying operation or a humidifying operation during indoor ventilation. During the dehumidifying or humidifying operation, the ventilation device (10) adjusts the humidity of the taken outdoor air (OA) and supplies it to the room as supply air (SA). At the same time, the ventilated air (RA) is discharged into the room. Discharge outside as (EA).

[0060] <Dehumidifying operation>

In the ventilator (10) during the dehumidifying operation, a first operation and a second operation described later are alternately repeated at a predetermined time interval (for example, every 3 minutes).

[0061] First, the first operation of the dehumidifying operation will be described. As shown in FIG. 5, during the first operation, only the second damper (42), the third damper (43), the fifth damper (45), and the eighth damper (48) are opened, and the rest. The dampers (41, 44, 46, 47) are closed. In this state, the air supply fan (26) and the exhaust fan (25) of the ventilation device (10) are operated. When the air supply fan (26) is operated, outdoor air is taken as first air from the outside air inlet (23) into the casing (11). When the exhaust fan (25) is operated, room air is taken as second air from the inside air inlet (24) into the casing (11).

In the refrigerant circuit (50) during the first operation, as shown in FIG. 3 (A), the four-way switching valve (54) is set to the first state. In the refrigerant circuit (50) in this state, the refrigerant circulates to perform a refrigeration cycle. At that time, in the refrigerant circuit (50), the refrigerant discharged from the compressor (53) flows in the order of the first adsorption heat exchanger (51), the electric expansion valve (55), and the second adsorption heat exchanger (52). The first adsorption heat exchanger (51) becomes a condenser and the second adsorption heat exchanger (52) becomes an evaporator.

[0063] The first air that has flowed into the outside air flow path (32) from the outside air inlet (23) flows into the second heat exchanger chamber (38) through the second damper (42), and then the second air exchanger (38). 2 Pass through the adsorption heat exchanger (52). First In the two adsorption heat exchanger (52), the 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 second adsorption heat exchanger (52) flows into the supply side flow path (33) through the eighth damper (48) and passes through the supply fan chamber (36) before being supplied. It is supplied into the room through the mouth (22).

[0064] On the other hand, the second air that has flowed into the room air side channel (34) from the room air inlet (24) flows into the first heat exchanger chamber (37) through the third damper (43), and then Pass 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, which has been given moisture by the first adsorption heat exchanger (51), flows into the exhaust side flow path (31) through the fifth damper (45), passes through the exhaust fan chamber (35), and is then exhausted. It is discharged out of the room through the mouth (21).

[0065] The second operation of the dehumidifying operation will be described. As shown in FIG. 6, during the second operation, only the first damper (41), the fourth damper (44), the sixth damper (46), and the seventh damper (47) are in an open state. The remaining dampers (42, 43, 45, 48) are closed.

In the refrigerant circuit (50) in the second operation, as shown in FIG. 3 (B), the four-way switching valve (54) is set to the second state. In the refrigerant circuit (50) in this state, the refrigerant circulates to perform a refrigeration cycle. At that time, in the refrigerant circuit (50), the refrigerant discharged from the compressor (53) flows in the order of the second adsorption heat exchanger (52), the electric expansion valve (55), and the first adsorption heat exchanger (51). The first adsorption heat exchanger (51) becomes an evaporator and the second adsorption heat exchanger (52) becomes a condenser.

[0067] The first air that has flowed into the outside air flow path (32) from the outside air inlet (23) flows into the first heat exchanger chamber (37) through the first damper (41), and then the first air 1 Pass through the 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 through the seventh damper (47) into the supply air flow path (33) and passes through the supply air fan chamber (36) before being supplied. It is supplied into the room through the mouth (22).

[0068] On the other hand, the second air that has flowed into the room air side channel (34) from the room air inlet (24) flows into the second heat exchanger chamber (38) through the fourth damper (44), and then Pass 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. Moisture was given by the second adsorption heat exchanger (52) The second air flows into the exhaust side flow path (31) through the sixth damper (46), passes through the exhaust fan chamber (35), and is discharged to the outside through the exhaust port (21).

[0069] <Humidification operation>

In the ventilation device (10) during the humidification operation, a first operation and a second operation described later are alternately repeated at a predetermined time interval (for example, every 3 minutes).

[0070] First, the first operation of the humidifying operation will be described. As shown in FIG. 7, during the first operation, only the first damper (41), the fourth damper (44), the sixth damper (46), and the seventh damper (47) are in the open state, and the rest. The dampers (42, 43, 45, 48) are closed. In this state, the air supply fan (26) and the exhaust fan (25) of the ventilation device (10) are operated. When the air supply fan (26) is operated, outdoor air is taken as first air from the outside air inlet (23) into the casing (11). When the exhaust fan (25) is operated, room air is taken as second air from the inside air inlet (24) into the casing (11).

In the refrigerant circuit (50) during the first operation, as shown in FIG. 3 (A), the four-way selector valve (54) is set to the first state. In the refrigerant circuit (50), as in the first operation of the dehumidifying operation, the first adsorption heat exchanger (51) becomes a condenser and the second adsorption heat exchanger (52) becomes an evaporator.

[0072] The first air that has flowed into the room air side flow path (34) from the room air inlet (24) flows into the second heat exchanger chamber (38) through the fourth damper (44), and thereafter 2 Pass through the adsorption heat exchanger (52). In the second adsorption heat exchanger (52), the 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 by the second adsorption heat exchanger (52) flows into the exhaust side flow path (31) through the sixth damper (46), and is exhausted after passing through the exhaust fan chamber (35). It is discharged out of the room through the mouth (21).

[0073] On the other hand, the second air that has flowed into the outside air flow path (32) from the outside air inlet (23) flows into the first heat exchanger chamber (37) through the first damper (41), and then Pass 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 into the supply side flow path (33) through the seventh damper (47) and passes through the supply fan chamber (36). It is supplied into the room through the air supply port (22). [0074] The second operation of the humidifying operation will be described. As shown in FIG. 8, during the second operation, only the second damper (42), the third damper (43), the fifth damper (45), and the eighth damper (48) are in the open state. The remaining dampers (41, 44, 46, 47) are closed.

In the refrigerant circuit (50) during the second operation, as shown in FIG. 3 (B), the four-way switching valve (54) is set to the second state. In this refrigerant circuit (50), as in the second operation of the dehumidifying operation, the first adsorption heat exchanger (51) serves as an evaporator and the second adsorption heat exchanger (52) serves as a condenser.

[0076] The first air that has flowed into the room air side channel (34) from the room air inlet (24) flows into the first heat exchanger chamber (37) through the third damper (43), and then 1 Pass through the 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 in the first adsorption heat exchanger (51) flows into the exhaust side flow path (31) through the fifth damper (45), and is exhausted after passing through the exhaust fan chamber (35). It is discharged out of the room through the mouth (21).

On the other hand, the second air that has flowed into the outside air flow path (32) from the outside air inlet (23) flows into the second heat exchanger chamber (38) through the second damper (42), and then Pass 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) passes through the eighth damper (48), flows into the supply air flow path (33), and passes through the supply air fan chamber (36). It is supplied into the room through the air supply port (22).

The operation of the control unit (60) will be described.

[0079] The control unit (60) is configured to cause the ventilation device (10) to ventilate the room all day. The control unit (60) causes the ventilator (10) to ventilate the room in normal operation, and when the predetermined time of night (for example, midnight) is reached, the ventilator (10) is moved from normal operation to the filter state detection operation. Switch to, and detect the clogged condition of the outside air filter (27) while ventilating the room. And a control part (60) will return a ventilation apparatus (10) to normal operation again from filter state detection operation, after filter state detection driving | operation is complete | finished.

[0080] Normal operation of the ventilator (10) will be described. In normal operation, ventilate the room. On the other hand, the control unit (60) controls the operation state of the ventilation device (10) so that the indoor humidity desired by the user is obtained.

[0081] Specifically, the humidity control unit (62) of the control unit (60) calculates the absolute humidity at the temperature and humidity from the target temperature and target humidity in the calculation unit, and the calculated absolute humidity is set as the target. Set to absolute humidity. The computing unit also calculates the absolute humidity of the outdoor air (OA) from the detection values of the outdoor temperature sensor (65a) and the outdoor air humidity sensor (65b). Further, the calculation unit calculates the absolute humidity of the room air (RA) from the detected values of the room temperature sensor (67a) and the room temperature humidity sensor (67b). Further, the calculation unit calculates the detected humidity of the supply air temperature sensor (66a) and the supply air humidity sensor (66b), and the absolute humidity of the supply air (SA).

[0082] The humidity control unit (62) determines the absolute humidity of the room based on the absolute humidity of the outdoor air (OA), the indoor air (RA) and the supply air (SA) and the target absolute humidity. The refrigeration cycle state of the refrigerant circuit (50) is controlled so that is close to the target absolute humidity. Control of the state of the refrigeration cycle of the refrigerant circuit (50) is performed by changing the refrigerant circulation amount by changing the operating frequency of the compressor (53) and the opening of the electric expansion valve (55), for example.

[0083] The filter state detection operation of the ventilation device (10) will be described with reference to the flowchart of FIG. In the filter state detection operation, the humidity control section (62) maintains the refrigeration cycle state of the refrigerant circuit (50) at a constant state, and the set fan tap of the air supply fan (26) Set to the same state as when guessed. The operating frequency of the compressor (53) and the opening of the electric expansion valve (55) are set to the same state as in the test for creating Equation 1 and Equation 2. As a result, the state of the refrigeration cycle of the refrigerant circuit (50) is substantially the same as when Formula 1 and Formula 2 were created.

[0084] First, in step ST1, the air volume estimation unit (64) of the filter state detection unit (63) performs detection values of the outside air temperature sensor (65a) and the outside air humidity sensor (65b), the supply air temperature sensor (66a), and Supply air humidity The sensor (66b) detection value is received, and the absolute humidity Xoa of the outdoor air (OA) and the absolute humidity Xsa of the supply air (SA) are calculated. When step ST1 ends, the process proceeds to step ST2.

[0085] In step ST2, the air flow estimation unit (64) uses the above-described equation 1 to calculate the outdoor air filter (27) from the absolute humidity Xoa of the outdoor air (OA) and the absolute humidity Xsa of the supply air (SA). Estimate the air volume Q of the air passing through. When step ST2 ends, the process proceeds to step ST3. [0086] In step ST3, the filter state detector (63) compares the estimated air volume Q with the initial air volume Q (0) of the outside air filter (27). Then, when the condition of Equation 3 is satisfied, the filter state detection unit (63) proceeds to step ST4 and displays “filter replacement sign”. L represents a preset constant. When the condition of Equation 3 is not satisfied at step ST3 and when step ST4 is completed, the filter state detection unit (63) ends the filter state detection operation and switches to the normal operation.

[0087] Equation 3: Q≤Q (0) X L

The filter state detection unit (63) performs a filter state detection operation at a predetermined time every day. When the condition of Equation 3 is satisfied, a “filter replacement sign” is displayed. For example, when L = 0.9, the air volume Q of the air passing through the outside air filter (27) detected in the filter state detection operation is 90% of the air volume Q (0) in the initial state of the outside air filter (27). When it drops to below, “Filter replacement sign” is displayed.

[0088] Effects of one embodiment

In the above embodiment, the filter state detection operation is performed so that the clogged state of the outside air filter (27) is detected without considering the state of the refrigeration cycle of the refrigerant circuit (50). By maintaining the refrigeration cycle state of the refrigerant circuit (50) constant in the filter state detection operation, the operating frequency of the compressor (53) and the electric expansion valve ( The air volume Q of the air passing through the outside air filter (27) can be estimated by the database function that does not include the opening of 55), and the clogged state of the outside air filter (27) is detected from the air volume Q can do. In other words, the outdoor air filter (27) is clogged considering only the changes in the absolute humidity of the outdoor air (OA) and the absolute humidity of the supply air (SA) as the state of the air supplied from outside to the room. Can be detected. Accordingly, since the detection of the clogging state of the outside air filter (27) is simplified and errors are less likely to occur, the detection accuracy of the clogging state of the outside air filter (27) can be improved.

In the above-described embodiment, the indoor humidity is adjusted together with the indoor ventilation in the normal operation except during the execution of the filter state detection operation. Therefore, if the filter state detection operation is performed during the night when there is no occupant, the humidity inside the room is adjusted during that time. Since it is not necessary, it is possible to detect the clogged state of the outside air filter (27) without impairing the comfort of the occupants.

[0090] Modification 1 of Embodiment

A first modification of the embodiment will be described. In this modified example 1, the air volume estimation unit (64) estimates the air volume Q of the air passing through the outside air filter (27) from the temperature of the outdoor air (OA) and the temperature of the supply air (SA). The

[0091] Specifically, the database function shown in Expression 4 is stored in the air volume estimation unit (64).

. As in the above embodiment, the database function of Equation 4 is created when the ventilator (10) is created by creating the database function “ _{Tsa = J} ( _Toa , _Q )” when designing the ventilator (10). The value of K is determined.

[0092] Equation 4: Tsa = J (Toa, Q) + K

In the above equation 4, Tsa is the temperature of the supply air (SA), Toa is the temperature of the outdoor air (〇A), Q is the air volume passing through the outside air filter (27), K is the pressure by the duct It shows the correction values considering the loss and the characteristics of the indoor space where the ventilation device (10) is installed.

[0093] By the way, when the air volume Q of the air passing through the outside air filter (27) (that is, the air volume passing through the adsorption heat exchanger (5 1, 52)) changes, the adsorption heat exchanger (51, 52) The amount of change in the temperature of the air passing through changes. Specifically, in the case of dehumidification, when the air volume Q decreases, the heat absorption amount of the refrigerant in the adsorption heat exchanger (51, 52) decreases. And compared with the state where the air volume Q does not decrease, the temperature drop of the dehumidified air decreases. In the case of humidification, if the air volume Q decreases, the amount of heat released from the refrigerant in the adsorption heat exchanger (51, 52) decreases. And compared with the state where the air volume Q does not decrease, the temperature rise of the humidified air decreases.

[0094] The database function of Equation 4 shows the air volume Q of the air passing through the outdoor-side finolator (27) and the temperature of the air passing through the adsorption heat exchanger (51, 52) when the ventilation device (10) is installed. It represents the relationship with the amount of change. According to Equation 4, the air volume Q of the air passing through the outside air filter (27) is estimated from the temperature Toa of the outdoor air (OA) and the temperature Tsa of the supply air (SA).

[0095] Modification 2 of Embodiment 2

A second modification of the embodiment will be described. In this modified example 2, the air volume estimation unit (64) is not provided, and “the absolute humidity Xoa of the outdoor air (OA) and the absolute humidity Xsa of the supply air (SA) The clogging state of the outside air filter (27) is detected on the basis of “the difference”.

[0096] Specifically, the filter state detector (63) includes the amount of change in humidity of the air passing through the adsorption heat exchanger (51, 52) in the initial state of the outside air filter (27) (Xsa—Xoa Is stored as a database. This database keeps the refrigeration cycle state of the refrigerant circuit (50) constant and the setting fan tap of the air supply fan (26) is fixed to a predetermined setting state (for example, “medium”). It is created by measuring the state of supply air (SA) while changing the state of air (OA). At that time, the absolute humidity Xoa of the outdoor air (OA) and the absolute humidity Xsa of the supply air (SA) are calculated by the air volume estimation unit (64) as in the above embodiment.

In the filter state detection operation performed every day, the state of the refrigeration cycle of the refrigerant circuit (50) and the set fan tap of the supply fan (26) are set to the same state as when the database was created. When the clogging of the outside air filter (27) progresses, even if the setting fan tap of the air supply fan (26) is set to the same setting as when creating the above database, the air volume of the air supply fan (26) (ie adsorption heat exchanger) (Air volume of air passing through (51,52)) decreases, so the amount of change in humidity of air passing through the adsorption heat exchanger (51,52) is smaller than when creating the database.

[0098] The filter state detector (63) detects the initial state of the outside air filter (27) when the humidity change amount of the air passing through the adsorption heat exchanger (51, 52) is reduced during the filter state detection operation. When the difference between the humidity change amount exceeds the set value, a “filter replacement sign” is displayed.

[0099] Modification 3 of Embodiment 1

A third modification of the embodiment will be described. In the third modification, the control unit (60) performs the first detection operation and the second detection operation in which the rotation speed of the air supply fan (26) is fixed to different values during the filter state detection operation. Let 10) do it.

[0100] Specifically, the filter state detector (63) maintains the refrigeration cycle state of the refrigerant circuit (50) constant in the initial state of the outside air filter (27), and performs the first detection operation and the second detection operation. Perform detection operation. During the first detection operation, the rotation speed of the air supply fan (26) is set to the predetermined value R1, and the air volume estimation unit (64) uses the equation 1 to calculate the air volume Q 1 (0) Guess. During the second detection operation, the rotational speed of the air supply fan (26) is set to the predetermined value R2, and the air volume estimation unit (64) uses Equation 1 to calculate the air volume Q2 (0) of the air passing through the outside air filter (27). Infer. The first The rotational speed Rl of the air supply fan (26) during the first detection operation is set to a value larger than the rotational speed R2 of the air supply fan (26) during the second detection operation.

[0101] In the filter state detection operation performed every day, the filter state detection unit (63) performs the first detection operation, the rotation speed of the air supply fan (26) is set to a predetermined value R1, and the air volume estimation unit (64) Estimate the air volume Q1 of the air passing through the outside-side finolator (27). The filter state detection unit (63) continues to perform the second detection operation, setting the rotational speed of the air supply fan (26) to a predetermined value R2, and the air volume estimation unit (64) is configured to detect the air passing through the outside air filter (27). Estimate air volume Q2. In the filter state detection operation, the state force air volume Q1 (0) and air volume Q2 (0) of the refrigeration cycle of the refrigerant circuit (50) are maintained in the same state as estimated.

[0102] The filter state detection unit (63) calculates the air volume Q 1 estimated by the air volume estimation unit (64) during the first detection operation and the air volume Q2 estimated by the air volume estimation unit (64) during the second detection operation. Based on the difference, the clogged state of the outside air filter (27) is detected.

FIG. 10 shows the relationship between the air volume Q of the air passing through the outside air filter (27) and the air resistance P inside and outside the ventilator (10). FIG. 10 shows that as the clogging of the outside air filter (27) progresses, the air resistance P increases and the air volume Q of the air passing through the outside air filter (27) decreases. Yes. If the outside air filter (27) becomes clogged, the air volume Q will not increase that much even if the rotational speed of the air supply fan (26) is increased, and the air volume estimation unit (64) will not be able to operate during the first detection operation. The difference between the estimated air volume Q1 and the air volume Q2 estimated by the air volume estimation unit (64) during the second detection operation is reduced.

[0104] The filter state detection unit (63) displays a "filter replacement sign" when the difference in air volume between the first detection operation and the second detection operation is small and the condition of Expression 4 is satisfied. G represents a preset constant (eg G = 0.5).

[0105] Equation 4: Q1 _Q2≤ {Q1 (0) _Q2 (0)} X G

Modification of one embodiment 4

Modification 4 of the embodiment will be described. In this modified example 4, a wind speed sensor is provided in the ventilation device (10), and the clogged state of the outside air filter (27) is detected based on the change in the detected value. The wind speed sensor is provided on the front side of the outside air filter (27) in the outside air channel (32). [0106] Specifically, when the outside air filter (27) becomes clogged, the detection value of the wind speed sensor becomes small. In the filter state detection operation, since the operation state of the ventilation device is kept constant, the change in the detection value of the wind speed sensor is caused by the change in the clogging state of the outside air filter (27). The filter state detection unit (63) displays a “filter replacement sign” when the detection value of the wind speed sensor falls below a preset threshold value.

It should be noted that a dust sensor may be provided instead of the wind speed sensor. As the clogging of the outside air filter (27) progresses, the amount of dust adsorbed on the outside air filter (27) increases, so the amount of dust passing through the outside air filter (27) also increases, and the detection value of the dust sensor growing. The filter state detection unit (63) displays a “filter replacement sign” when the detection value of the dust sensor exceeds a preset threshold value.

[0108] In addition, an odor sensor may be provided instead of the wind speed sensor. As the clogging of the outside air filter (27) progresses, the amount of odor adsorbed on the outside air filter (27) increases, so the amount of odor passing through the outside air filter (27) also increases, and the detection of the odor sensor The value increases. The filter state detection unit (63) displays a “filter exchange sign” when the detection value of the odor sensor exceeds a preset threshold value.

[0109] Modification 5 of Embodiment 5—

Modification 5 of the embodiment will be described. In this modified example 5, the rotational speed of the air supply fan (26) using a DC motor as the fan motor is controlled to be constant, and the outside air filter (27) is clogged based on the change in the input power. Detect state.

[0110] Specifically, when the clogging of the outside air filter (27) proceeds, the air resistance of the outside air filter (27) increases, and the rotational torque of the DC motor increases. In the filter state detection operation, since the operation state of the aeration device is kept constant, the change in the rotational torque of the DC motor is caused by the change in the clogging state of the outside air filter (27). When the rotational torque of the DC motor increases, the fan control unit (61) increases the input power to increase the input energy of the DC motor in order to control the rotational speed of the air supply fan (26) to be constant. The filter state detection unit (63) displays a “filter exchange sign” when the value of the input power exceeds a preset threshold value.

[0111] The output of the fan motor of the air supply fan (26) is controlled to be constant so that the air supply fan (26) A clogged state of the outside air filter (27) may be detected based on a change in the rotational speed. Specifically, when the outside air filter (27) becomes clogged, the air resistance of the outside air filter (27) increases, the rotational torque of the DC motor increases, and the rotational speed decreases. The filter state detector (63) displays a “filter replacement sign” when the rotational speed of the air supply fan (26) falls below a preset threshold value.

[0112] << Other Embodiments >>

You may comprise the said embodiment like the following modifications.

[0113] First Modification 1

For the above embodiment, the detection value of the temperature sensor, humidity sensor, wind speed sensor, dust sensor, or odor sensor that measures the state of the air supplied from the outside to the room, the input power of the air supply fan (26) or The clogging of the outside air filter (27) may be detected by combining changes in the rotational speed.

[0114] Second modification

In the above embodiment, a timer for measuring the accumulated operation time of the ventilation device (10) after filter replacement is provided, and when the measured time of the timer reaches a predetermined time, the outside air filter detected by the filter state detection operation Even if the clogging state in (27) does not reach the point where “filter replacement sign” is displayed, “filter replacement sign” may be used. This timer is used to cut off the replacement judgment of the outside air filter (27).

[0115] Third modification

In the above embodiment, the filter (27) is clogged with the damper (41, 42, 43, 44, 45, 4 6, 47, 48) (air passage) fixed in the filter state detection operation. May be detected. For example, when there is no occupant, such as at night, there is no need to adjust the humidity in the room, so the air passage can be fixed. As a result, the air flow in the casing (11) becomes constant, and errors in the detection values of the various sensors are reduced, so that the clogged state of the outside air filter (27) can be detected more accurately. it can.

[0116] 1st Modification 1

In the above embodiment, the ventilator (10) that performs ventilation for 24 hours is targeted. However, in the ventilator (10) that is activated by turning the power on and off by a user input, The filter state detection operation may be performed immediately after turning on or off.

[0117] Fifth modification

In the said embodiment, the ventilation apparatus (10) may be comprised as follows. As shown in FIG. 11, the ventilation device (10) of the first modified example includes a refrigerant circuit (100) and two adsorbing elements (111, 112). The refrigerant circuit (100) is a closed circuit in which a compressor (101), a condenser (102), an expansion valve (103), and an evaporator (104) are connected in order. When the refrigerant is circulated in the refrigerant circuit (100), a vapor compression refrigeration cycle is performed. This refrigerant circuit (100) constitutes a heat source means. The first adsorbing element (111) and the second adsorbing element (112) each include an adsorbent such as zeolite and constitute an adsorbing member. Each adsorbing element (111, 112) is formed with a large number of air passages, and the air contacts the adsorbent when passing through the air passages.

[0118] This ventilation device (10) repeats the first operation and the second operation. As shown in FIG. 11 (A), the ventilation device (10) in the first operation supplies air heated by the condenser (102) to the first adsorption element (111) to regenerate the adsorbent. Then, the air deprived of moisture by the second adsorption element (112) is cooled by the evaporator (104). In addition, as shown in FIG. 11 (B), the ventilation device (10) in the second operation regenerates the adsorbent by supplying the air heated by the condenser (102) to the second adsorption element (112). On the other hand, the air deprived of moisture by the first adsorption element (111) is cooled by the evaporator (104). The ventilator (10) has a dehumidifying operation for supplying the air taken in from the room dehumidified when passing through the adsorption element (111, 112) into the room, and when passing through the adsorption element (111, 112). The operation is switched between the humidification operation where the air taken in from the humidified room is supplied to the room.

[0119] Sixth Modification

In the said embodiment, the ventilation apparatus (10) may be comprised as follows. As shown in FIG. 12, the ventilation device (10) of the second modified example includes a humidity control unit (150). The humidity control unit (150) includes a Peltier element (153) and a pair of suction fins (151 and 152). The adsorption fins (151, 152) are obtained by carrying an adsorbent such as zeolite on the surface of a so-called heat sink. The suction fins (151 and 152) constitute a suction member. The first saddle fin element (153) is joined to one surface of the belt cage element (153), and the second suction fin (152) is joined to the other surface. When direct current is passed through the Peltier element (153), one of the two adsorption fins (151, 152) becomes the heat absorption side and the other becomes the heat dissipation side. This Peltier element (1 53) constitutes a heat source means.

[0120] This ventilation device (10) repeats the first operation and the second operation. The humidity control unit (150) in the first operation regenerates the adsorbent of the first adsorption fin (151) on the heat dissipation side to humidify the air, while the second adsorption fin ( Adsorb moisture to the adsorbent of 152) to dehumidify the air. In addition, the humidity control unit (150) during the first operation regenerates the adsorbent of the second adsorption fin (152) on the heat dissipation side to humidify the air, while the first adsorption fin ( Adsorb moisture to the adsorbent of 151) to dehumidify the air. The ventilator (10) has a dehumidifying operation for supplying the air taken from outside the room, which has been dehumidified when passing through the humidity control unit (150), into the room, and is humidified when passing through the humidity control unit (150). Switch between humidifying operation to supply air taken from outside into the room.

[0121] The above embodiments are essentially preferable examples, and are not intended to limit the scope of the present invention, its application, or its use.

Industrial applicability

[0122] As described above, the present invention is useful for a ventilation device that adjusts indoor humidity as well as indoor ventilation.

Claims

The scope of the claims

[1] An adsorbing member (51, 52) carrying an adsorbent and heat source means (50) for heating at least the adsorbent of the adsorbing member (51, 52),

A ventilation device that adjusts the humidity by bringing the taken outdoor air into contact with the adsorbent of the adsorbing member (51, 52) and supplies it to the room, and at the same time exhausts the taken room air to the outside.

A filter member (27, 28) for cleaning the outdoor air taken in;

Filter state detecting means (63) for detecting a clogged state of the filter member (27, 28) based on the state of air supplied from the outside to the room,

In the normal operation of ventilating the room while controlling the operating state of the ventilator (10), the filter state detecting means (in the state where the operating state of the ventilator (10) is kept constant)

63) A ventilator characterized in that a filter state detection operation for detecting a clogged state of the filter member (27, 28) in 63) can be executed.

[2] A refrigerant circuit (50) for performing a refrigeration cycle connected to an adsorption heat exchanger (51, 52) carrying an adsorbent is provided,

Humidity is adjusted by bringing the outdoor air taken into contact with the adsorbent of the adsorption heat exchanger (51, 52) heated or cooled by the refrigerant in the refrigerant circuit (50) and supplied to the room at the same time. A ventilation device for discharging

A filter member (27, 28) for cleaning the outdoor air taken in;

A normal operation for ventilating the room while controlling the operating state of the ventilator (10); and the filter member in the filter state detecting means (63) in a state where the operating state of the ventilator (10) is kept constant. (27, 28) A ventilator characterized by being capable of performing a filter state detection operation for detecting a clogged state.

[3] In claim 1 or 2,

The filter state detection means (63) includes a state of air supplied from the outside to the room during the filter state detection operation, and an outside state in the initial state of the filter member (27, 28). A ventilator characterized by detecting the clogging state of the filter member (27, 28) based on the state of air supplied to the room.

[4] In claim 3,

The filter state detection means (63) includes an air volume estimation unit (64 4) that estimates the air volume of the air passing through the filter member (27, 28) based on the state of air supplied from the outside to the room. The air volume estimated by the air volume estimating unit (64) during the filter state detecting operation and the initial state of the filter member (27, 28) are estimated by the air volume estimating unit (64). A ventilator characterized by detecting a clogging state of the filter member (27, 28) based on the amount.

[5] In claim 1 or 2,

It has an air supply fan (26) for taking in outdoor air,

In the filter state detection operation, a first detection operation and a second detection operation for fixing the rotation speed of the air supply fan (26) to different values are performed,

The filter state detecting means (63) is configured to estimate an air volume of air passing through the filter member (27, 28) based on a state of air supplied from the outside to the room (64 4). ) And the filter member (64) based on the difference between the air volume estimated by the air volume estimation unit (64) during the first detection operation and the air volume estimated by the air volume estimation unit (64) during the second detection operation. 27,28) A ventilator characterized by detecting a clogging state.

[6] In any one of claims 1 to 5,

A ventilator configured to perform the filter state detection operation at a predetermined time.