JP2007298206A - Air conditioner and roll filter unit - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an air conditioner and a roll filter unit capable of preventing deflection and loosening of a filter element of a roll filter without increasing a dimension and costs of a take-up motor. <P>SOLUTION: This roll filter unit 20 is provided with the roll filter 24, a wire mesh member 26, a pressing frame member 27, the take-up motor 31, a gear 32 and a limit switch 33 in a unit body 25. The roll filter 24 is composed of a feed roller 21, a take-up roller 22 and the filter element 23. As a plane portion 23a of the filter element 23 is passed and sent between the wire mesh member 26 and the pressing frame member 27, the deflection and loosening of the plane portion 23a of the filter element 23 are hardly found. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to an air conditioner having a roll filter and a roll filter unit.

  Conventionally, as this type of air conditioner, a fan, a fan motor, and a heat exchanger are arranged in a casing composed of a casing body, a ceiling panel, and a ceiling grill, and a suction chamber on the upstream side of the fan. There is one in which a roll filter is arranged (Japanese Utility Model Laid-Open No. 04-120526 (Patent Document 1)). In this roll filter, the flat portion of the filter medium between the winding roll and the feeding roll is supported by a bar-like support from the downstream side of the air flow, and the air flow presses the flat portion of the filter medium from the upstream side. Even so, the flat portion of the filter medium is prevented from being bent or loosened downstream. And the said winding roll is driven with a winding motor.

  However, in the above-described conventional air conditioner, even if the flat portion of the filter medium is supported by a cross-shaped support body from the downstream side of the air flow, it is not supported from the upstream side, so the air conditioner is not operated. Thus, when the air flow is not pressing the filter medium from the upstream side, there is a problem that the filter medium is bent or loosened upstream. In particular, while the air conditioner is not in operation, the winding roll is driven by the winding motor, and the winding roll is stopped while the filter medium is being fed from the feeding roll. Even if the feeding of the filter medium is stopped, there is a problem that the feeding roll continues to rotate due to inertia and the filter medium continues to be fed, so that the filter medium may be bent or loosened. In particular, at the beginning of use of the roll filter, since the mass on the side of the feed roll around which most of the filter medium is wound is large, there is a tendency that the feed roll continues to rotate on its own and the filter medium is loosened.

  In order to prevent such self-running rotation on the side of the feeding roll and to prevent loosening of the filter medium, it has been proposed to brake the feeding roll with a braking member such as rubber or a spring.

However, when braking is applied to the feeding roll in this way, a large torque is required to drive the winding roll, so that the winding motor becomes large and expensive.
Japanese Utility Model Publication No. 04-120526

  Therefore, an object of the present invention is to provide an air conditioner that can prevent the filter medium of the roll filter from being bent and loosened without making the winding motor large and expensive.

In order to solve the above problems, the air conditioner of the present invention is
A casing having an inlet and an outlet;
A fan that is provided in the casing and sends air from the suction port toward the air outlet;
A fan motor for driving the fan;
A heat exchanger provided in the casing for exchanging heat between the air and the refrigerant;
A feed roll, a take-up roll, and a filter medium connected to the take-up roll and the take-up roll, and a plane portion of the filter medium between the take-up roll and the feed roll is air suction in the casing A roll filter arranged in the passage,
A winding motor for driving the winding roll;
A downstream support member that supports a downstream surface of the air flow in the flat portion of the filter medium;
And an upstream support member that supports an upstream surface of the air flow in the flat portion of the filter medium.

  According to the air conditioner having the above configuration, when the winding motor is driven and the filter medium is wound from the supply roll to the winding roll, the flat portion of the filter medium is between the downstream support member and the upstream support member. Will be sent through. Thus, since the flat part of the filter medium is sandwiched between the downstream support member and the upstream support member, the flat part of the filter medium is hardly bent or loosened.

  From a different viewpoint, during the operation of the air conditioner, the flat part of the filter medium is pressed against the downstream support member by the air flow, while the flat part of the filter medium is subjected to gravity or the like while it is stopped. Supported by the upstream support member. Therefore, it is possible to prevent the flat portion of the filter medium from being bent or loosened even when the air conditioner is in operation or stopped.

  In addition, when the filter medium is wound around the winding roll, the downstream support member and the upstream support member sandwiching the flat part of the filter medium provide an appropriately distributed frictional resistance that is not excessive with respect to the flat part of the filter medium. It is possible to prevent excessive tension from being applied to the filter medium at the feeding roll. Therefore, when the take-up roll is stopped, the feeding roll does not rotate by itself even if there is no braking member. In this way, the self-running rotation of the feeding roll can be prevented without providing a braking member, and the filter medium can be prevented from being bent or loosened. Therefore, the winding torque of the winding motor is reduced, and the winding motor is downsized. Can be made inexpensive.

In the air conditioner of one embodiment,
The feeding roll and the winding roll are paper tubes,
The filter medium is made of a material that becomes general waste.

  According to the embodiment, the feeding roll and the take-up roll are paper tubes, and the filter medium is made of a material that becomes a general waste. Therefore, the roll filter is not an industrial waste, but a general waste. Can be easily discarded.

  The material of the filter medium is selected from materials that become general wastes such as synthetic fibers such as polyester fibers, paper materials, and natural fibers.

In the air conditioner of one embodiment,
The winding roll has a notch at one end,
The shaft of the winding motor has an engaging portion with which the notch is detachably engaged,
A holding portion that urges and holds the other end portion of the winding roll so as to advance and retreat is provided.

  According to the embodiment, after the other end portion of the winding roll is pressed against the holding portion and moved backward, the notch at the one end portion of the winding roll is used as the engaging portion of the shaft of the winding motor. By engaging, the winding roll can be easily engaged with and attached to the shaft of the winding motor. Moreover, in order to remove the winding roll from the shaft of the winding motor, it can be easily removed by reversing the above-described operation.

In the air conditioner of one embodiment,
The upstream surface of the flat portion of the filter medium is an outer surface on the radially outer side of the filter medium in a state wound around the feeding roll, and the filter medium in a state wound around the take-up roll. It is an inner surface on the radially inner side.

  According to the said embodiment, the upstream surface which capture | acquires the dust and the fat of the flat part of the said filter medium turns into the inner surface of the radial inside of the filter medium in the state wound by the said winding roll. Therefore, the upstream surface of the filter medium that has been contaminated by trapping dust and fat can be hidden on the inner surface of the filter medium in the radial direction when the filter medium is wound around the take-up roll. Absent. Therefore, when the roll filter is discarded, the operator does not get his hands dirty with dust or grease, and the roll filter is clean.

  Further, according to the embodiment, the upstream surface of the flat portion of the filter medium is an outer surface on the radially outer side of the filter medium in a state of being wound around the feeding roll, and therefore downstream of the flat portion of the filter medium. The side surface becomes the inner surface in the radial direction of the filter medium wound around the feeding roll. As described above, the downstream surface of the flat portion of the filter medium to be cleaned is always the inner surface on the inner side in the radial direction in the state of being wound around the feeding roll, so that it is not contaminated.

In the air conditioner of one embodiment,
A gear that is partially wound with the filter medium and rotates as the filter medium is fed;
A detection unit for detecting rotation of the gear;
And a control device for controlling the driving of the winding motor based on a signal from the detection unit regarding the rotation of the gear.

  According to the embodiment, since the tooth tip of the gear bites into the filter medium, the gear surely rotates as the filter medium is fed. Therefore, the detection unit that detects the rotation of the gear can reliably detect the feed amount of the filter medium. Therefore, based on the signal from the detection unit indicating the amount of the filter medium fed, the control device can control the driving of the winding motor so that the filter medium feed becomes a desired value accurately. For example, the control device can send the filter medium by a fixed amount corresponding to the length of one plane part of the filter medium facing the air suction passage based on the signal from the detection unit.

In the air conditioner of one embodiment,
The control device outputs a signal indicating an abnormality to the warning unit when a signal indicating rotation of the gear is not received from the detection unit in a state in which a signal for instructing driving of the winding motor is output. .

  According to the above embodiment, the filter is sent when the control device does not receive a signal representing the rotation of the gear from the detection unit even though it outputs a signal instructing driving of the winding motor. If not, a signal indicating abnormality is output to the warning section.

  Therefore, according to this embodiment, it is possible to reliably detect an abnormality such as a state where there is no filter medium on the feeding roll or a state where the filter medium is clogged. In addition, since the abnormality can be reliably detected in this way, the winding motor can be protected from overload.

  The warning unit can give a warning by using a display of a light emitting diode or the like, a buzzer sound, a voice, or the like.

In the air conditioner of one embodiment,
A drive command unit for commanding the drive of the winding motor;
When the control device receives a signal for instructing driving of the winding motor from the driving command unit for a predetermined number of times corresponding to the length of the filter medium, the controller does not drive the winding motor, And the signal showing that the usable state of the said filter medium was complete | finished is output to a display part.

  According to the embodiment, the control device receives the signal for instructing driving of the take-up motor from the drive command unit more than a predetermined number of times corresponding to the length of the filter medium. Since the motor is not driven, it is possible to prevent overloading of the take-up motor and disconnection of the roll filter, and it is possible to prevent wasteful power consumption.

  In addition, since the control device determines whether or not all of the filter medium has been used based on the number of times the drive command unit has received a signal for instructing driving of the winding motor, the filter medium can be used easily. The end of the state can be detected.

  Moreover, since the said control apparatus outputs the signal showing that the usable state of the said filter medium was complete | finished to the display part, the user can know the completion | finish of the usable state of a filter medium easily.

In the air conditioner of one embodiment,
The warning part is a display part, and this display part displays a warning, in addition to displaying a warning, indicating the driving of the winding motor,
Further, the display unit is also a drive command unit that commands the drive of the winding motor.

  According to the embodiment, the warning unit serves as a display unit that indicates the driving of the winding motor and as a driving command unit for the winding motor. Therefore, according to the above embodiment, the function of the warning unit, the function of the display unit, and the function of the drive command unit are combined with one display unit. Therefore, when the warning unit, the display unit, and the drive command unit are provided separately, In comparison, the space occupied by the display unit having these functions is reduced, and the display unit becomes compact.

In the air conditioner of one embodiment,
A roll filter unit comprising the unit body provided with the winding motor, the downstream support member, the upstream support member, and the roll filter is detachably provided on the casing.

  According to the above embodiment, the unit main body is provided with the winding motor, the downstream support member, the upstream support member, and the roll filter to constitute the roll filter unit, and the roll filter unit is detachably provided on the casing. ing. Therefore, by attaching and detaching the roll filter unit to / from the casing, it is possible to simplify the work of attaching and removing the roll filter, and to reduce maintenance costs.

The air conditioner of one embodiment is
The casing includes at least a casing body and a ceiling panel,
The heat exchanger is arranged downstream of the fan,
The ceiling-embedded air conditioner in which the roll filter is disposed in a suction chamber formed in the casing so as to be positioned upstream of the fan.

  According to the above embodiment, since the roll filter or roll filter unit having the above-described configuration is used for a ceiling-embedded air conditioner that requires work at a high place during maintenance, there is no bending or loosening of the filter, and the number of maintenance can be reduced. In addition, the filter can be easily replaced.

  In addition, since the ceiling-embedded air conditioner is installed behind the ceiling, there is a space limitation and a reduction in size is required. However, in the above embodiment, the take-up motor can be reduced in size, and this requirement is met. be able to.

The roll filter unit of the present invention is
The unit body,
A roll filter having a feeding roll and a winding roll attached to the unit main body, and a filter medium connected to the feeding roll and the winding roll;
A winding motor for driving the winding roll;
A downstream support member attached to the unit main body and supporting a downstream surface of the air flow in the flat portion of the filter medium between the feeding roll and the winding roll;
And an upstream support member that is attached to the unit main body and supports an upstream surface of the air flow in the flat portion of the filter medium.

  According to the roll filter unit of the present invention, since the flat part of the filter medium is sandwiched between the downstream support member and the upstream support member, the flat part of the filter medium is almost always bent or loosened. Absent.

  Further, since the downstream support member and the upstream support member sandwich the flat portion of the filter medium, it is possible to prevent the filter medium from being bent and loosened without providing a brake member that applies a large braking force to the feeding roll. By reducing the winding torque of the winding motor, the winding motor can be made smaller and less expensive.

  Furthermore, this roll filter unit can be incorporated into the existing air conditioner or made optional.

  According to the present invention, since the flat portion of the filter medium is sandwiched between the downstream support member and the upstream support member, the filter medium of the roll filter is prevented from being bent or loosened without making the winding motor large and expensive. it can.

  Hereinafter, the present invention will be described in detail with reference to the illustrated embodiments.

  As shown in FIG. 1, a ceiling-embedded air conditioner as an example of an air conditioner has a suction port 6 and a blower facing downward in a casing 5 including a casing body 1, a ceiling panel 2, and a decorative panel 3. An outlet 7 is provided. A wind direction vane 8 is provided at the outlet 7.

  In the casing body 1, a heat exchanger 11 having a substantially rectangular shape in plan view is disposed, and a drain pan 12 is disposed below the heat exchanger 11. Further, fans 15 and 15 and fan motors 16 and 16 for driving the fans 15 and 15 are arranged in a space surrounded by the substantially square heat exchanger 11.

  A roll filter unit 20 having a roll filter 24 is provided in the suction chamber 17 as an example of an air suction passage below the fans 15 and 15. The roll filter 24 includes a feeding roll 21, a winding roll 22, and a filter medium 23 having both ends connected thereto by pasting or the like.

  When the fans 15 and 15 are driven by the fan motors 16 and 16, the air sucked from the suction port 6 passes through the flat portion 23 a of the filter medium 23 of the roll filter 24, passes through the place where the fan 15 exists, and further heat Heat is exchanged with a refrigerant such as cold / hot water in the exchanger 11 and blown out from the blowout port 7.

  As shown in FIG. 2, the roll filter unit 20 includes a unit main body 25, a roll filter 24, a wire mesh member 26 as an example of a downstream support member, and a bar-shaped presser frame as an example of an upstream support member. A member 27, a winding motor 31 made of, for example, a step motor, a gear 32, and a limit switch 35 as an example of a detection unit are provided. The roll filter unit 20 is detachably attached to the casing body 1 with bolts or locking hooks (not shown).

  Therefore, since this roll filter unit 20 can be easily attached to and detached from the casing body 1, it can be made optional, and can be incorporated in an existing air conditioner.

  The roll filter unit 20 may be used in combination with a normal plate-shaped filter (not shown), or may be used in place of this normal plate-shaped filter.

  The wire mesh member 26 supports the flat portion 23a of the filter medium 23 between the feeding roll 21 and the take-up roll 22 from the downstream side of the air flow, while the holding frame member 27 supports the flat portion 23a of the filter medium 23 with the air flow. It is designed to support from the upstream side. Therefore, the flat portion 23 a of the filter medium 23 is sandwiched between the wire mesh member 26 and the presser frame member 27, and is less likely to be bent or loosened.

  As shown in FIG. 4, the feeding roll 21 is fitted into a groove of a hook-shaped receiving plate 41 provided at the end of the unit body 25.

  Further, as shown in FIG. 3, after the filter medium 23 is wound around the feeding roll 21 several times, it is wound around a part of the gear 32 having a thin tooth thickness, and further becomes a flat portion 23a. It extends between the metal mesh member 26 and the holding frame member 27. Since the tooth tip of the gear 32 has a small tooth thickness and bites into the filter medium 23, the gear 32 rotates reliably as the filter medium 23 is fed. The shaft of the gear 32 is provided with a hemispherical or semi-cylindrical convex portion 33 made of, for example, a bolt head, and this convex portion 33 activates a limit switch 35 as an example of a detecting portion for each rotation of the gear 32. I try to let them. Therefore, since the feed amount of the filter medium 23 can be accurately and reliably detected by the limit switch 35 via the gear 32 in which the teeth bite into the filter medium 23, the feed amount of the filter medium 23 can be controlled accurately and reliably. become.

  Note that the detection unit may be configured by an encoder and an optical or magnetic sensor instead of the limit switch 35.

  On the other hand, as shown in FIG. 5, the winding roll 22 is attached to the shaft 42 of the winding motor 31. Both ends of the filter medium 23 in the width direction are guided by guides 49.

  As shown in FIG. 6A, a notch 22a is provided at one end of the winding roll 22. On the other hand, an engagement pin 42a as an engagement portion is fixed to the shaft 42 of the winding motor 31, and the engagement pin 42 has a notch 22a as shown in FIGS. 6 (A) and 6 (B). The winding roll 22 rotates with the shaft 42 of the winding motor 31. The other end of the winding roll 22 is held by a holding portion 45 so as to be able to advance and retreat. The holding portion 45 is attached to a shaft portion 46 to which the other end portion of the winding roll 22 is fitted, and is attached to the shaft portion 46 so that the winding roll 22 can be advanced and retracted in the axial direction via a spring seat 48. The spring 47 is energized.

  In order to mount the take-up roll 22 on the shaft 42 of the take-up motor 31, the other end of the take-up roll 22 is interposed via a spring seat 48 as shown by an arrow in FIGS. 6 (A) and 6 (B). After the spring 47 is compressed and fitted to the shaft portion 46, the notch 22 a is fitted into the engaging pin 42 a of the shaft 42 of the winding motor 31 from the axial direction, so that the winding roll 22 is connected to the shaft 42. It can be easily attached to the holding portion 45.

  In a state where the winding roll 22 is fitted to the shaft 42, the spring 47 is pressed in the axial direction, and therefore the engagement between the engagement pin 42a and the notch 22a is difficult to be disengaged.

  In order to remove the take-up roll 22 from the shaft 42 of the take-up motor 31, it is possible to remove it very easily by performing the operation opposite to the operation at the time of mounting.

  The winding roll 22 and the feeding roll 21 are made of paper tubes. The filter medium 23 is made of, for example, a polyester fiber having a thickness of approximately 0.2 mm (trade name: thermal bond (TCKR60 manufactured by Toyobo)). The filter medium 23 is not industrial waste but general waste.

  Since the filter medium 23 is extremely thin with a thickness of about 0.2 mm, the entire roll filter 24 is small and compact. Therefore, this roll filter 24 can be suitably used not only for a ceiling-embedded air conditioner but also for a wall-mounted air conditioner and a floor-standing air conditioner.

  Further, the roll filter 24 can be easily disposed of as a general waste because the winding roll 22 and the feeding roll 21 are made of paper tubes and the filter medium 23 is a polyester fiber.

  The filter medium 23 is not limited to polyester fiber, and may be any material such as synthetic fiber, natural fiber, and paper material as long as it can be discarded as general waste. Further, it may be a non-woven fabric or a woven fabric.

  Further, as schematically shown in FIGS. 7 and 8, the upstream surface 23 au of the flat portion 23 a is the outer surface in the radial direction of the filter medium 23 wound around the feeding roll 21. And it is the inner surface of the inner side in the radial direction of the filter medium 23 wound around the winding roll 22. That is, the inner surface in the radial direction of the filter medium 23 wound around the feeding roll 21 becomes a downstream surface 23ad of the flat surface portion 23a, and the downstream surface 23ad of the flat surface portion 23a corresponds to the winding roll 22. It becomes an outer surface on the radially outer side of the filter medium 23 in a state of being wound around. In FIG. 7, the direction of air flow is indicated by arrows.

  When the roll filter 24 is discarded, all the filter medium 23 is wound around the take-up roll 22 and discarded. However, when all the filter medium 23 is wound around the take-up roll 22, dust and fat are captured from the air flow. Thus, the upstream surface 23 au of the dirty filter medium 23 is hidden behind the inner surface in the radial direction of the filter medium 23 wound around the take-up roll 22 and does not become the outer surface. Therefore, when the roll filter 24 is discarded, the operator does not get his hands dirty with dust or grease, and the roll filter 24 is clean.

  Further, the downstream surface 23 ad of the flat surface portion 23 a of the filter medium 23 is an inner surface in the radial direction of the filter medium 23 wound around the feeding roll 21. Accordingly, the downstream surface 23ad of the flat portion 23a of the filter medium 23 to be cleaned is always the inner surface in the radial direction in the state of being wound around the feeding roll 21 and is protected, so that it may become dirty. Absent.

  Further, as shown in FIG. 10, which is a view taken in the direction of arrow A in FIG. 1, a display unit 55 is provided on the ceiling panel 2. The display unit 55 is formed by integrating an operation switch as an example of a drive command unit and a light warning unit using an element such as a light emitting diode. That is, the display unit 55 has all functions of a drive command unit, a warning unit, and an operation display unit that indicates an operation state.

  Further, as shown in FIG. 9, the control device 50 receives signals from a limit switch 35 as an example of a detection unit and a display unit 55 that also serves as an operation switch, and controls the driving of the winding motor 31. The display of the display unit 55 is controlled. Although not shown in FIG. 1, the control device 50 is attached to the casing 1.

  The control device 50 includes a microcomputer, and includes a fixed amount feeding unit 51, a warning determination unit 52, a display control unit 53, and a number control unit 54. The fixed amount feeding unit 51, the warning discriminating unit 52, the display control unit 53, and the number control unit 54 are configured by software.

  The control device 50 drives the winding motor 31 when receiving a drive command from the display unit 55 that also serves as an operation switch. The fixed amount feeding unit 51 counts the number of signals received from the limit switch 35 that represents the number of rotations of the gear 32. Then, when the gear 32 rotates by the number of times corresponding to the length of the one flat surface portion 23a of the filter medium 23 facing the air suction passage, and when the quantitative feed unit 51 receives the signal from the limit switch 35, the winding is performed. A signal for stopping the driving of the motor 31 is output. In this way, the fixed amount feeding unit 51 performs fixed amount feeding by the length of one flat surface portion 23a of the filter medium 23 facing the air suction passage.

  This constant feed is performed based on the number of rotations of the gear 32 that the tooth tip bites into the filter medium 23 and rotates reliably as the filter medium 23 is fed.

  During this quantitative feed, the display control unit 53 causes the display unit 55 to continuously light up to indicate that the quantitative feed is being performed.

  In addition, the warning determination unit 52 outputs an abnormality signal when a signal indicating rotation of the gear 32 is not received from the limit switch 35 for a certain period of time in a state where a signal for instructing driving to the winding motor 31 is output. Is output to the display control unit 53. Then, the display control unit 53 causes the display unit 55 having a function as a warning unit to perform a warning by blinking, for example, at intervals of one second.

  As described above, if the signal indicating the rotation of the gear 32 is not received from the limit switch 35 in spite of the output of the signal for instructing the driving of the winding motor 31, the filter medium 23 is not sent and the display Since the part 55 blinks at intervals of 1 second, it is possible to reliably detect an abnormality such as a state where the filter medium 23 is not present on the feeding roll 21 or a state where the filter medium 23 is clogged, and notify the operator. Further, the winding motor 31 can be protected from overload.

  The number control unit 54 counts the number of times the display unit 55 that also serves as an operation switch is pressed to instruct the drive of the winding motor 31, and the number of times is set in advance corresponding to the length of the filter medium 23. When it reaches a certain number of times, for example, 13 times, the winding motor 31 is not driven, and a signal indicating that the filter medium 23 is completely used and the usable state is completed is output to the display control unit 53. Then, the display control unit 53 causes the display unit 55 having a function as a warning unit to flash, for example, blinking for 1 second and turning off for 2 seconds.

  As described above, when the number-of-times control unit 54 receives a signal for instructing driving of the winding motor 31 from the display unit 55 that also serves as an operation switch at least 13 times corresponding to the length of the filter medium 23, Since the winding motor 31 is not driven, overloading of the winding motor 31 and cutting of the filter medium 23 can be prevented, and wasteful power consumption can be prevented.

  Further, since the number control unit 54 determines whether or not all the filter medium 23 has been used on the basis of the number of times a signal instructing driving of the winding motor 31 is received from the display unit 55 that also serves as an operation switch, Furthermore, the end of the usable state of the filter medium 23 can be detected.

  Furthermore, the above-described number control unit 54 warns the display unit 55 that the usable state of the filter medium 23 has ended by causing the display unit 55 to flash for 1 second and to turn off for 2 seconds. The operator can easily know the end of the usable state of the filter medium 23.

  Since the display unit 55 serves as a warning unit, a display unit function indicating that the winding motor 31 is being driven, and a drive command unit, the display unit 55 has a separate warning unit, display unit, and drive command unit. Compared with the case where it is provided, the space occupied by the display unit having these functions is reduced, and the display becomes compact.

  However, although not shown, a warning unit, a display unit, and a drive command unit may be provided separately.

  Instead of the display unit 55, a warning may be given by sound using a buzzer, a sound generator, or the like as a warning unit.

  According to the air conditioner having the above configuration, when the operator presses the display unit 55 that also serves as an operation switch with a push rod (not shown), the control device 50 drives the winding motor 31 to remove the filter medium 23 from the feeding roll 21. A predetermined amount corresponding to the flat portion 23a is wound on the winding roll 22. If it does so, the plane part 23a of the filter medium 23 will be sent through between the wire-mesh member 26 as a downstream side support member, and the cross-shaped pressing frame member 27 as an upstream side support member.

  As described above, since the flat portion 23a of the filter medium 23 is sandwiched between the wire mesh member 26 and the bar-shaped holding frame member 27, the flat portion 23a of the filter medium 23 is almost always bent or loosened. Absent.

  More specifically, during the operation of the air conditioner, the flat portion 23a of the filter medium 23 is pressed against the wire mesh member 26, which is the downstream support member, by the air flow, while the flat portion 23a of the filter medium 23 is stopped during the stop. Is supported by the presser frame member 27 which is an upstream support member even when subjected to gravity or the like. Therefore, it is possible to prevent the flat portion 23a of the filter medium 23 from being bent or loosened even when the air conditioner is in operation or stopped.

  Further, when the filter medium 23a is wound around the winding roll 31, the wire mesh member 26 and the cross-shaped holding frame member 27 sandwiching the flat section 23a of the filter medium 23 do not become excessive with respect to the flat section 23a of the filter medium 23. Appropriate distributed frictional resistance can be provided. Therefore, as shown in FIG. 3, excessive tension is not applied to the portion 23 b of the filter medium 23 in the vicinity of the feeding roll 21. Therefore, when the take-up roll 22 is stopped, the feeding roll 21 does not rotate by itself even if there is no braking member. As described above, since the self-running rotation of the feeding roll 21 can be prevented without providing a braking member, and the filtering medium 23 can be prevented from being bent or loosened, the winding torque of the winding motor 31 can be reduced to reduce the winding motor. 31 can be reduced in size and made inexpensive.

  In the above embodiment, the wire mesh member 26 is used as the downstream support member and the cross-shaped holding frame member 27 is used as the upstream support member. However, the upstream support is used using the cross-shaped press frame member as the downstream support member. A wire mesh member may be used as the member. Further, instead of the wire mesh member, a resin mesh member or a resin beam member may be used. The downstream support member and the upstream support member may have any shape and material as long as they can support the filter medium from the downstream side and the upstream side.

  In the above embodiment, the ceiling-embedded air conditioner has been described as the air conditioner. However, the present invention can also be applied to a wall-mounted air conditioner and a floor-standing air conditioner. .

  Moreover, you may comprise a casing with a casing main body, a suction grille, and a front panel. Further, a suction grill may be used instead of the decorative panel.

  Further, the heat exchanger may be arranged on the upstream side of the fan, and may be U-shaped, J-shaped, V-shaped or the like.

FIG. 1 is a cross-sectional view of an air conditioner according to an embodiment of the present invention. FIG. 2 is a front view of the roll filter unit. FIG. 3 is an enlarged view of a portion where the feeding roll exists. FIG. 4 is an enlarged view of the backing plate. FIG. 5 is an enlarged view of a portion where the winding roll exists. FIG. 6 is a diagram for explaining how to mount the winding roll. FIG. 7 is a schematic diagram of a roll filter. FIG. 8 is a diagram illustrating a state in which the roll filter is wound up. FIG. 9 is a block diagram of the control device. It is a bottom view of the air conditioner of FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Casing main body 2 Ceiling panel 5 Casing 20 Roll filter unit 21 Feeding roll 22 Winding roll 23 Filter medium 24 Roll filter 26 Wire mesh member 27 Cross-shaped holding frame member 31 Winding motor 32 Gear 35 Limit switch 42 Shaft 42a Engaging pin 45 Holding unit 50 Control device 55 Display unit

Claims (11)

A casing (5) having an inlet and an outlet;
A fan (15) provided in the casing (5) for sending air from the suction port toward the blowout port;
A fan motor (16) for driving the fan (15);
A heat exchanger (11) provided in the casing (5) for exchanging heat between the air and the refrigerant;
While having a feeding roll (21), a winding roll (22), a filter medium (23) connected to the feeding roll (21) and the winding roll (22), the winding roll (22) A roll filter (24) in which a flat portion (23a) of the filter medium (23) between the feed roll (21) is disposed in an air suction passage in the casing (23);
A winding motor (31) for driving the winding roll (22);
A downstream support member (26) that supports a downstream surface of the air flow in the flat surface portion (23a) of the filter medium (23);
An air conditioner comprising: an upstream support member (27) that supports an upstream surface of the air flow in the flat portion (23a) of the filter medium (23). In the air conditioner according to claim 1,
The feeding roll (21) and the winding roll (22) are paper tubes,
The air conditioner characterized in that the filter medium (23) is made of a material that becomes general waste. In the air conditioner according to claim 1 or 2,
The winding roll (22) has a notch (22a) at one end,
The shaft (42) of the winding motor (31) has an engaging portion (42a) with which the notch (22a) is detachably engaged,
A holding part (45) for energizing and holding the other end of the winding roll (22) so as to advance and retreat.
An air conditioner comprising: In the air conditioner according to any one of claims 1 to 3,
The upstream surface (23au) of the flat portion (23a) of the filter medium (23) is an outer surface on the radially outer side of the filter medium (23) wound around the feeding roll (21), and An air conditioner that is an inner surface in the radial direction of the filter medium (23) wound around the winding roll (22). In the air conditioner according to any one of claims 1 to 4,
A gear (32) in which the filter medium (23) is partially wound and rotates in accordance with the feed of the filter medium (23);
A detector (35) for detecting the rotation of the gear (23);
An air conditioner comprising: a control device (50) that controls driving of the winding motor (31) based on a signal from the detection unit (35) relating to rotation of the gear (32). The air conditioner according to claim 5,
When the control device (50) is outputting a signal instructing driving of the winding motor (31) and does not receive a signal indicating the rotation of the gear (32) from the detection unit (31). In addition, the air conditioner is characterized by outputting a signal indicating an abnormality to the warning section (55). In the air conditioner according to claim 5 or 6,
A drive command unit (55) for commanding the drive of the winding motor (31);
The control device (50) receives a signal for instructing driving of the winding motor (31) from the drive command section (55) for a predetermined number of times or more corresponding to the length of the filter medium (23). In some cases, the air conditioner is characterized in that the winding motor (31) is not driven and a signal indicating that the filter medium (23) is ready for use is output to the display unit (55). . In the air conditioner according to claim 6 or 7,
The warning unit (55) is a display unit (55), and the display unit (55) displays a warning and displays the driving of the winding motor (31).
The air conditioner is characterized in that the display unit (55) is also a drive command unit (55) for commanding the drive of the winding motor (31). The air conditioner according to any one of claims 1 to 8,
A roll filter unit (20) comprising the unit body (25) provided with the winding motor (31), the downstream support member (26), the upstream support member (27), and the roll filter (24). Is detachably provided on the casing (5). The air conditioner according to any one of claims 1 to 9,
The casing (5) includes at least a casing body (1) and a ceiling panel (2),
The heat exchanger (11) is disposed downstream of the fan (15),
A ceiling-embedded air conditioner in which the roll filter (24) is disposed in a suction chamber (17) formed so as to be positioned upstream of the fan (15) in the casing (5). Air conditioner. A unit body (25);
A roll having a feeding roll (21) and a winding roll (22) attached to the unit main body (25), and a filter medium (23) connected to the feeding roll (21) and the winding roll (22). A filter (24);
A winding motor (31) for driving the winding roll (22);
It is attached to the unit body (25) and supports a downstream surface of the air flow in the flat portion (23a) of the filter medium (23) between the feeding roll (21) and the take-up roll (22). A downstream support member (26);
A roll filter comprising: an upstream support member (27) attached to the unit body (25) and supporting an upstream surface of the air flow in the flat portion (23a) of the filter medium (23). unit.

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