JP2013050273A - Ventilation device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a ventilation device capable of recognizing the polluted situation of air in a target space even while performing ventilation using a total heat exchanger.SOLUTION: A total heat exchanging element 12 makes heat be exchanged between air passing through an air supply flow passage 40 and air passing through an exhaust flow passage 30 without mixing them. A carbon dioxide sensor 60 detects a carbon dioxide concentration contained in the air passing through the exhaust flow passage 30. A control unit 70 controls a fan motor driving an air supply fan 15 and an exhaust fan 14 according to the detection result of the carbon dioxide sensor 60.

Description

  The present invention relates to a ventilation device.

  2. Description of the Related Art Conventionally, ventilators equipped with a total heat exchanger that takes in fresh air into a room while suppressing a change in temperature in the room to prevent an increase in air conditioning load have been used.

  For example, in the ventilation device described in Patent Document 1 (Japanese Patent Application Laid-Open No. 2004-43035), a device configured in combination with an air cleaner has been proposed. In this ventilator, an example is shown in which the space on the downstream side (indoor side) of the total heat exchange air in the supply air flow channel into which fresh outdoor air is taken in is used in combination for ventilation and air purification. That is, in this ventilator, the indoor air outlet opened toward the room is connected to the space on the indoor air outlet side of the total heat exchanger and the ventilation mode connected to the outside via the total heat exchanger, and the total heat exchanger The two operation modes are switched from the space on the indoor outlet side to the air cleaning mode connected to the room via the air cleaning filter (without passing through the total heat exchanger).

  In the ventilation device described in Patent Document 1 (Japanese Patent Application Laid-Open No. 2004-43035) described above, a sensor that senses the indoor air pollution concentration is disposed on the indoor outlet side of the total heat exchanger. Thereby, in the said ventilation apparatus, when the contamination density | concentration which a sensor senses is high, ventilation mode is performed, fresh air is taken in indoors, and when the contamination density | concentration is low, the air purifying mode is performed.

  However, in the configuration of the ventilator, the position where the sensor is provided is in the middle of the air supply channel for taking outdoor air into the room of the ventilator, so that it is taken in mainly from the outdoors during the ventilation mode. It will sense the air pollution concentration. For this reason, in the structure of the said ventilation apparatus, in order to detect a contamination density | concentration appropriately, it will be necessary to perform air cleaning mode and to pass indoor air around a sensor.

  The present invention has been made in view of the above points, and the object of the present invention is to grasp the air pollution status of the target space even during ventilation using a total heat exchanger. An object of the present invention is to provide a ventilation device that can do this.

  A ventilator according to a first aspect of the present invention is a ventilator that ventilates between an outdoor space and a target space, and is provided with an air supply channel, an air supply unit, an exhaust channel, an exhaust unit, and a heat exchanger. , Detecting means, and a control unit. The air supply channel is a channel for supplying air in the outdoor space to the target space. The supply air blower generates an air flow toward the target space in the supply air flow path. The exhaust passage is a passage for discharging the air in the target space to the outdoors. The exhaust air blowing means generates an air flow toward the outdoor space in the exhaust flow path. The heat exchanger exchanges heat without mixing the air passing through the air supply passage and the air passing through the exhaust passage. The detection means detects a specific component contained in the air passing through the exhaust passage. The control unit controls at least one of the supply air blowing unit and the exhaust ventilation unit according to the detection result of the detection unit. It should be noted that the downstream end of the exhaust flow path does not necessarily extend to the outdoor space. For example, a duct that extends to the outdoor space can be connected to the downstream end of the exhaust flow path. May be. The upstream end of the exhaust flow path does not necessarily extend to the target space. For example, a duct that extends to the target space may be connected to the upstream end of the exhaust flow path. Good. The downstream end of the air supply channel does not necessarily have to extend to the target space. For example, a duct that extends to the target space can be connected to the downstream end of the air supply channel. Good. The upstream end of the air supply channel does not necessarily extend to the outdoor space. For example, a duct that extends to the outdoor space can be connected to the upstream end of the air supply channel. Good.

  In this ventilator, the detection means detects a specific component contained in the air passing through the exhaust passage. For this reason, in the state where heat exchange ventilation is performed, the air is continuously flowing from the target space to the outside through the inside of the exhaust passage around the detection means. Therefore, the specific component of the air in the target space can be detected during the heat exchange ventilation. Thereby, ventilation amount control according to the detection of a specific component is attained, performing heat exchange ventilation.

  The ventilation apparatus which concerns on the 2nd viewpoint of this invention is further provided with the casing which accommodates a heat exchanger in the ventilation apparatus which concerns on a 1st viewpoint. The surface of the casing on the target space side has an air supply outlet that is a downstream end portion of the air supply passage and an exhaust suction port that is an upstream end portion of the exhaust passage. The detection means is disposed on the downstream side of the heat exchanger in the exhaust passage.

  When a ventilation device is installed in the space on the back side of the wall surface that partitions the target space, there is a property where the distance in the thickness direction of the wall surface is not sufficiently secured.

  In this ventilator, even if it is installed for such a property, it is not necessary to secure a space for the detection means between the upstream end in the exhaust flow path and the heat exchanger.

  The ventilation apparatus which concerns on the 3rd viewpoint of this invention is a ventilation apparatus which concerns on a 2nd viewpoint, The surface by the side of the object space of a casing is a surface of the lower surface side in the installation state of a casing. The detection means is disposed in the casing and vertically above the lower surface and the heat exchanger.

  In this ventilator, it is possible to easily reach the detection means by removing the heat exchanger from the lower surface side of the casing through the air supply outlet and the exhaust inlet. For this reason, the maintainability of a detection means can be improved.

  A ventilator according to a fourth aspect of the present invention is the ventilator according to the third aspect, wherein the shortest distance between the heat exchanger and the lower surface of the casing is shorter than the shortest distance between the heat exchanger and the upper surface of the casing. In addition, the position of the heat exchanger in the casing is determined. The heat exchanger is arranged in a posture that allows the air flowing through the exhaust passage to pass from below to above.

  In this ventilation device, it is possible to secure a space for the flow path downstream of the heat exchanger in the exhaust flow path by securing a vertical distance between the upper surface in the casing and the heat exchanger. it can. And since the detection means is arrange | positioned in the downstream of an exhaust flow path, and is not arrange | positioned in the upstream of an exhaust flow path, the space for the exhaust flow path between the lower surface in a casing and a heat exchanger. Is not particularly necessary. For this reason, it becomes possible to shorten the vertical dimension of the apparatus.

  The ventilator which concerns on the 5th viewpoint of this invention is a ventilator which concerns on either of the 1st viewpoint to the 4th viewpoint, Comprising: A detection means detects the density | concentration of the carbon dioxide in air.

  In this ventilator, since the detection means detects the concentration of carbon dioxide, it is possible to cause the control unit to execute ventilation control according to the concentration of carbon dioxide in the target space.

  In the ventilator according to the first aspect of the present invention, it is possible to control the ventilation amount according to the detection of the specific component while performing heat exchange ventilation.

  In the ventilator according to the second aspect of the present invention, it is not necessary to secure a space for the detection means between the upstream end portion in the exhaust passage and the heat exchanger.

  In the ventilator according to the third aspect of the present invention, the maintainability of the detection means can be improved.

  In the ventilation device according to the fourth aspect of the present invention, the vertical dimension of the device can be shortened.

  In the ventilator according to the fifth aspect of the present invention, it is possible to cause the control unit to perform ventilation control according to the concentration of carbon dioxide in the target space.

It is a conceptual diagram for demonstrating the air flow of the interior panel and the ventilation apparatus which concerns on one Embodiment of this invention. It is a side view of the ventilator of the state installed in the ceiling material using the interior panel, and the connection duct being connected. It is a bottom view of a ventilator. It is a bottom perspective view of a ventilator. It is a schematic block diagram of a total heat exchange element. It is a disassembled perspective view of the state from which the total heat exchange element etc. were removed. It is a perspective view which shows the installation state of a carbon dioxide sensor.

  Hereinafter, a ventilation device 10 according to an embodiment of the present invention will be described with reference to the drawings.

  In FIG. 1, the conceptual diagram for demonstrating the air flow of the interior panel 20 and the ventilation apparatus 10 is shown. In FIG. 1, for easy understanding of the outline of the air flow, a member such as a fan is arranged and illustrated in the vertical direction, but the ventilation device 10 of this embodiment is shown in other drawings. The fans and the like are arranged side by side in the depth direction in FIG.

  FIG. 2 shows a side view of the ventilator 10 installed on the ceiling material 99 using the interior panel 20 and connected to the exhaust connection duct 83 and the air supply connection duct 84.

  FIG. 3 shows a bottom view of the ventilation device 10. In FIG. 4, the perspective view at the time of seeing from the downward direction of the ventilator 10 is shown. FIG. 5 shows a schematic configuration diagram of the total heat exchange element 12.

  In FIG. 6, the disassembled perspective schematic of the ventilation apparatus 10 is shown. In FIG. 7, the perspective view which shows the installation state of the carbon dioxide sensor 60 is shown.

(1) Schematic Configuration of Ventilator 10 As shown in FIG. 2, the ventilator 10 of the present embodiment supplies fresh air from the outdoor OS to the indoor SI that is the target space, and converts the air in the indoor SI to the outdoor OS. It is a device that exhausts and ventilates while exchanging heat between the exhaust air and the supply air. The ventilation device 10 of the present embodiment is installed in a space between the ceiling material 99 and the ceiling surface 50. As shown in FIG. 2, the ventilating apparatus 10 of the present embodiment is connected to an outdoor SO by providing the connected exhaust connection duct 83 and the supply connection duct 84 so as to penetrate the wall surface 98. An example is shown.

  The ventilation device 10 includes a casing 11, a total heat exchange element 12, an exhaust passage 30, an air supply passage 40, an exhaust fan 14, an air supply fan 15, a fan motor 13, an exhaust filter 12b, an air supply filter 12c, a switching damper 18, The heat insulating partition member 17, the carbon dioxide sensor 60, and the control unit 70 are included.

  The casing 11 has a substantially rectangular parallelepiped shape having an upper surface 11a, a lower surface 11b, a front surface 11c, a back surface 11d, a left side surface 11f, and a right side surface 11e. The lower surface 11 b of the casing 11 is provided so as to be located above the upper surface of the ceiling material 99. The left side surface 11f and the right side surface 11ef are each provided with two mounting brackets 52 as fixing means. The mounting bracket 52 and the plurality of bolts 51 fixed to the ceiling surface 50 are screwed and fixed to each other, so that the casing 11 is suspended in the space between the ceiling material 99 and the ceiling surface 50. It is fixed in the state. A control unit 70 is provided on the rear surface 11d side of the left side surface 11f, outside the left side surface 11f in the thickness direction. The upper surface 11a and the lower surface 11b are provided so as to be substantially in parallel with the ceiling surface 50 and the ceiling material 99. The lower surface 11b is provided with an opening 11x in which a half on the rear surface 11d side penetrates in the vertical direction. A part of the opening 11x on the front surface 11a side constitutes an exhaust suction port 32a on the upstream side (inside the indoor SI side) of the exhaust flow path 30, and the other part of the opening 11x on the back surface 11d side supplies A supply air outlet 42 a on the downstream side (inside the indoor SI) of the air flow path 40 is configured. In addition, the horizontal outer edge of the opening 11x of the lower surface 11b of the casing 11 has a shape for connecting an interior panel 20 described later, and a connected portion 11y slightly extending downward in the vertical direction is provided. It has been. The front surface 11c is provided with both an exhaust air outlet 31a and an air supply / intake port 41a provided so as to protrude in a nozzle shape toward the outside in the thickness direction. For this reason, since the flow path does not extend outside the casing 11 from the upper surface 11a, the left side surface 11f, the right side surface 11e, and the rear surface 11d, there is no restriction on the arrangement space outside these surfaces (the left side surface 11f and the left side surface 11f). (Excluding the mounting bracket 52 and the control unit 70 provided on the right side surface 11e).

  The exhaust passage 30 extends from the exhaust inlet 32 a to the exhaust outlet 31 a through the exhaust passage upstream space 32, the total heat exchange element 12, and the exhaust passage downstream space 31. Is a flow path configured by being connected.

  The air supply passage 40 is formed in the casing 11 from the air supply inlet 41a via the air supply passage upstream space 41, the total heat exchange element 12, and the air supply passage downstream space 42. The flow path is configured by connecting up to 42a. The air supply channel 40 and the exhaust channel 30 are separated from each other by a partition member inside the casing 11.

  The total heat exchange element 12 is a substantially rectangular parallelepiped heat exchanger housed in the casing 11. Each surface of the total heat exchange element 12 is disposed in a posture that is parallel to each surface of the casing 11. In the present embodiment, the vertical length between the lower surface of the total heat exchange element 12 and the opening 11 x of the lower surface 11 b of the casing 11 (exhaust flow path upstream space 32) is the shortest among the carbon dioxide sensors 60. The total heat exchange element 12 is arranged so as to be shorter than the length of the side. The vertical length between the lower surface of the total heat exchange element 12 and the opening 11x of the lower surface 11b of the casing 11 (exhaust flow path upstream space 32) is, for example, the upper surface of the total heat exchange element 12 and the casing 11. It may be 20% or less of the length between the upper surface 11a and 10% or less. The total heat exchange element 12 is provided so that the end face in the longitudinal direction faces the left side surface 11f and the right side surface 11e of the casing 11, respectively. The total heat exchange element 12 is disposed so as to fit in a vertically upward space with respect to the opening 11x of the lower surface 11b of the casing 11 (specifically, the exhaust inlet 32a of the exhaust passage 30). In this total heat exchange element 12, the exhaust air flow passes from the lower surface side toward the upper surface side, and the supply air flow passes from the front surface side toward the rear surface side. Heat exchange between them. As shown in FIG. 5, the total heat exchange element 12 allows the return air RA in the room SI to pass from the exhaust passage upstream space 32 toward the exhaust passage downstream space 31 as exhaust EA. Further, the total heat exchange element 12 allows the outdoor air OA of the outdoor SO to pass as the supply air SA from the supply passage upstream space 41 toward the supply passage downstream space 42 (in FIG. 1, the return air RA to the exhaust EA). ) Is indicated by a dotted line, and the flow of the supply air SA from the outside air OA is indicated by a solid line. Here, the total heat exchange element 12 is configured such that heat exchange is performed between the air flowing through the exhaust passage 30 and the air flowing through the air supply passage 40, but these air are not mixed with each other. Has been.

  The exhaust fan 14 is disposed on the front surface 11a side of the casing 11 in the exhaust flow path downstream space 31 of the exhaust flow path 30, and is configured by an impeller casing and a sirocco fan (not shown).

  The supply fan 15 is disposed on the front surface 11a side of the casing 11 in the supply passage upstream space 41 of the supply passage 40, and is configured by an impeller casing and a sirocco fan (not shown).

  The exhaust fan 14 and the air supply fan 15 have a common rotating shaft, and are driven by a fan motor 13 that rotationally drives the common rotating shaft.

  As shown in FIG. 6, the exhaust filter 12b is disposed in the exhaust flow channel upstream space 32 of the exhaust flow channel 30 so as to cover the lower surface side of the total heat exchange element 12, and is taken in from the indoor SI side. It captures dust collection.

  As shown in FIG. 6, the air supply filter 12c is disposed in the air supply channel upstream space 41 of the air supply channel 40 so as to cover the front side of the total heat exchange element 12, and is taken in from the outdoor SO. It captures dust collection.

  As shown in FIGS. 1 and 6, the switching damper 18 is attached in the vicinity of the lower end on the back surface side of the total heat exchange element 12, and is provided between the space 42 on the downstream side of the supply air passage 40 and the indoor SI. The control unit 70 performs switching control between a state where the cover is closed and a state where the cover is not closed.

  The heat insulation partition member 17 is provided inside the casing 11 so as to cover the space on the back surface side and the top surface side of the total heat exchange element 12, and is made of a foam having a heat insulation function. By this heat insulating partition member 17, a space on the back side of the total heat exchange element 12 (air supply flow path downstream space 42) and a space on the upper surface side of the total heat exchange element 12 (exhaust flow path downstream space 31) They can be separated from each other.

  As shown in FIGS. 3 and 7, the carbon dioxide sensor 60 is arranged in the middle of the exhaust flow path 30 and detects the concentration of carbon dioxide contained in the air passing through the surroundings. More specifically, the carbon dioxide sensor 60 is fixed to the upper surface 11 a in the casing 11 in the exhaust flow path 30 on the downstream side of the total heat exchange element 12, that is, in the exhaust flow path downstream space 31. It is arranged like this. As shown in FIG. 3, the carbon dioxide sensor 60 is close to the right side surface 11 e side inside the casing 11, and is vertically above the upper surface of the total heat exchange element 12 when the total heat exchange element 12 is accommodated. It is arranged to fit in the space. That is, the carbon dioxide sensor 60 is in the space vertically above the exhaust air inlet 32 a of the exhaust flow channel upstream side space 32 of the exhaust flow channel 30 and above the top surface of the total heat exchange element 12 in the vertical direction. It is arranged in the space. Thus, the carbon dioxide sensor 60, the exhaust suction port 32a, and the total heat exchange element 12 are arranged so as to overlap each other in the vertical direction. As shown in FIG. 7, the carbon dioxide sensor 60 has a housing, and a wiring opening 61 is provided on a side surface of the housing. As shown in FIG. 3, the sensor wiring 73 extends from the carbon dioxide sensor 60 to the control unit 70 through the wiring opening 61, and the carbon dioxide concentration detected by the carbon dioxide sensor 60 is transmitted to the control unit 70. Is able to. The sensor wiring 73 is fixed to the inner surface of the upper surface 11 a of the casing 11 by a clamp member 75 at an intermediate position between the carbon dioxide sensor 60 and the control unit 70. As shown in FIG. 3, the damper wiring 74 extending from the control unit 70 extends to the switching damper 18 and switches the state of the switching damper 18 in accordance with a command from the control unit 70. Similarly, the damper wiring 74 is also fixed to the upper surface 11a of the casing 11 by the clamping agent 75.

  As described above, the control unit 70 is provided outside the left side surface 11f of the casing 11, and as shown in FIG. 4, an electrical board 71 is accommodated therein. The control unit 70 is provided in a portion where a part of the left side surface 11f of the casing 11 penetrates in the plate thickness direction, and this penetration portion can be covered by the cover 72 from the inside of the casing 11. ing.

(2) Schematic configuration of interior panel 20 The interior panel 20 has an opening 11x (specifically, the exhaust inlet 32a and the supply air outlet 42a) on the indoor SI side, which is the lower surface of the casing 11 of the ventilation device 10, with a ceiling material 99. It has a decorative panel 21 and a duct portion 22.

  The decorative panel 21 is provided so as to face the indoor SI side, and is disposed on the indoor SI side in the plate thickness direction of the ceiling material 99 as shown in FIG. Here, the shape of the decorative panel 21 in plan view is a shape along the edge of the opening 99x provided in the ceiling material 99, and the outer edge of the decorative panel 21 in plan view is the opening 99x provided in the ceiling material 99. Slightly larger than.

  The duct portion 22 constitutes a flow path for connecting the opening 11x (the exhaust inlet 32a and the air supply outlet 42a) of the lower surface 11b of the casing 11 of the ventilation device 10 from above the decorative panel 21. The upper end of the duct portion 22 is connected to the connected portion 11y that extends downward from the lower surface 11b of the casing 11 of the ventilation device 10 in the vertical direction. As a result, the interior panel 20 is connected to the ventilation device 10. When the switching damper 18 is in an open state, the space in the duct portion 22 is partitioned by the switching damper 18 into a space connected to the exhaust flow path 30 and a space connected to the air supply flow path 40.

  Here, as shown in FIG. 2, in a state where the casing 11 of the ventilation device 10 is fixed to the ceiling surface 50 via the mounting bracket 52, the space between the lower surface 11 b of the casing 11 and the ceiling surface 50 is between. The vertical length Z has already been determined. On the other hand, the vertical distance X between the ceiling surface 50 and the ceiling material 99 may be different for each property. Therefore, the distance Y between the lower surface 11b of the casing 11 and the upper surface of the decorative panel 21 of the interior panel 20 is different for each property. Here, by appropriately selecting the length of the duct portion 22 of the interior panel 20 in the vertical direction, it is possible to correspond to a different distance Y for each property.

(3) Ventilation operation In the ventilator 10, the control unit 70 controls the driving states of the supply fan 15 and the exhaust fan 14 according to the carbon dioxide concentration detected by the carbon dioxide sensor 60.

  Specifically, the carbon dioxide sensor 60 targets the air flowing through the total heat exchange element 12 from the indoor SI toward the exhaust flow channel downstream space 31 of the exhaust flow channel 30, and the carbon dioxide concentration is measured. Detect. Here, the control unit 70 determines whether or not the carbon dioxide concentration detected by the carbon dioxide sensor 60 satisfies a predetermined ventilation start condition (in this embodiment, whether or not the predetermined start concentration is exceeded). . When the predetermined ventilation start condition is satisfied, the control unit 70 opens the switching damper 18 so that the outdoor SO and the indoor SI are connected to each other via the air supply passage 40. By driving the motor 13, the air supply fan 15 and the exhaust fan 14 are driven to perform heat exchange ventilation, and fresh air is taken into the room SI while suppressing an increase in the air conditioning load of the room SI.

  After waiting for a predetermined time after finishing the above processing, the control unit 70 again grasps the carbon dioxide concentration detected by the carbon dioxide sensor 60 and determines whether or not the carbon dioxide concentration satisfies a predetermined ventilation stop condition. (In this embodiment, it is determined whether or not it is below a predetermined stop concentration). When the predetermined ventilation stop condition is satisfied, the control unit 70 closes the switching damper 18 so that the outdoor SO and the indoor SI are not connected, and the fan motor 13 is stopped. Stop heat exchange ventilation. The control unit 70 repeats the above operation so that the carbon dioxide concentration in the room SI does not increase excessively and maintains the room SI in a comfortable state.

(4) Maintenance When maintaining the total heat exchange element 12, the air supply filter 12c, the exhaust filter 12b, the switching damper 18, the carbon dioxide sensor 60, and the control unit 70 of the ventilation device 10, as shown in FIG. The total heat exchange element 12, the air supply filter 12c, the exhaust filter 12b, and the switching damper 18 are taken out through the opening 11x on the lower surface 11b of the casing 11 of the ventilator 10, and maintenance work is performed.

  When the total heat exchange element 12, the air supply filter 12c, the exhaust filter 12b, and the switching damper 18 are taken out from the ventilation device 10, the carbon dioxide sensor 60 and the control unit 70 can be made to face inward. These may be maintained without being removed.

(5) Features (5-1)
The ventilator 10 of the above embodiment can perform ventilation while performing heat exchange between the air from the room SI flowing through the exhaust flow path 30 and the air of the outdoor SO flowing through the air supply flow path 40. For this reason, it becomes possible to supply fresh air to indoor SI, suppressing the temperature change of indoor SI by taking in fresh air of outdoor SO in indoor SI.

(5-2)
When the ventilation device 10 is performing a ventilation operation, air from the room SI is taken into the ventilation device 10, so that the area around the carbon dioxide sensor 60 provided in the exhaust flow path 30 is always from the room SI. It will be covered with air. For this reason, in this ventilator 10, it becomes possible to keep track of the carbon dioxide concentration of the air in the room SI while performing the ventilation operation.

  Accordingly, by grasping the detected concentration by the carbon dioxide sensor 60 while performing the ventilation operation, the ventilation operation can be finished when the carbon dioxide concentration of the air in the room SI is lowered to a predetermined ventilation stop condition. . For this reason, it becomes possible to prevent the temperature of the indoor SI from excessively rising or excessively decreasing due to the air in the outdoor SO. For this reason, for example, when an air conditioner is installed in the same room SI, fresh air as much as possible can be supplied to the room SI while suppressing an increase in the air conditioning load of the air conditioner.

(5-3)
The vertical length X between the ceiling surface 50 on which the ventilator 10 is installed and the ceiling material 99 may vary depending on the property.

  On the other hand, in the said embodiment, the ventilation apparatus 10 can be installed appropriately by adjusting the length Y of the duct part 22 of the interior panel 20 in the vertical direction.

  In the ventilator 10 of the above embodiment, the length in the vertical direction between the opening 11x of the lower surface 11b of the casing 11 and the lower surface of the total heat exchange element 12 (exhaust flow path upstream space 32) is shortened. Arranged configuration. For this reason, for example, when adjusting the vertical length Y of the duct portion 22 of the interior panel 20 to be short, the space between the opening 11x of the lower surface 11b of the casing 11 and the lower surface of the total heat exchange element 12 (on the exhaust passage) There are properties that make it difficult to provide a space for disposing the carbon dioxide sensor 60 in the flow side space 32).

  On the other hand, in the ventilator 10 of the above-described embodiment, the carbon dioxide sensor 60 is disposed in the exhaust flow channel downstream space 31 in the exhaust flow channel 30 in the casing 11, so that the installation restriction by the property is limited. Not receive.

(5-4)
The ventilation device 10 includes an opening 11x on the lower surface 11b of the casing 11, a total heat exchange element 12, an air supply filter 12c, an exhaust filter 12b, a switching damper 18, and a carbon dioxide sensor 60 arranged in a vertical direction. Yes.

  Therefore, even when the carbon dioxide sensor 60 is maintained, the total heat exchange element 12, the air supply filter 12c, the exhaust filter 12b, and the switching damper 18 are removed through the opening 11x on the lower surface 11b of the casing 11. It can be easily reached from the indoor SI side. For this reason, maintenance can be performed without destroying the ceiling material 99.

(5-5)
In addition, about the lower surface side of the total heat exchange element 12, while the exhaust inlet 32a is opened to the up-down direction, it will be in the state by which the wide space has expanded in indoor SI with the said ventilator 10 installed. Therefore, it is easy to secure the flow passage width of the exhaust flow passage upstream space 32, and there is no particular problem even if the length in the vertical direction between the lower surface 11b of the casing 11 and the ceiling member 99 is shortened. .

  On the other hand, about the upper surface side of the total heat exchange element 12, if the distance between the upper surface 11a of the casing 11 of the ventilator 10 is narrowed, the exhaust passage downstream space 31 of the exhaust passage 30 will be described. Therefore, it becomes impossible to ensure a sufficient channel width. For this reason, the exhaust passage downstream space 31 of the exhaust passage 30 needs to secure a certain length in the vertical direction between the upper surface of the total heat exchange element 12 and the upper surface 11a of the casing 11.

  And in the ventilation apparatus 10 of the said embodiment, it is possible to divert the position where it needs to ensure to some extent in this way to the installation space of the carbon dioxide sensor 60.

(6) Other Embodiments Embodiments of the present invention are not limited to the above-described embodiments. For example, the following embodiments are also included in the embodiments of the present invention.

(6-1)
In the above embodiment, the ventilator 10 is used in which the exhaust connection duct 83 is connected to the exhaust outlet 31a of the front surface 11c of the casing 11, and the supply connection duct 84 is connected to the supply inlet 41a. Was described as an example.

  However, the embodiment of the present invention is not limited to this, and the exhaust outlet 31a and the intake inlet 41a are directly connected to the outdoor SO without using the exhaust connection duct 83 and the supply connection duct 84. May be.

(6-2)
In the above embodiment, the ventilator 10 using the carbon dioxide concentration as a criterion for determining ventilation control and employing the carbon dioxide sensor 60 has been described as an example.

  However, the embodiment of the present invention is not limited to this. For example, the concentration of carbon monoxide or the concentration of VOC (Volatile Organic Compounds) is used as a criterion for ventilation control. A ventilator equipped with a sensor capable of detecting the concentration of these components may be used.

  Since the ventilator of the present invention can grasp the air pollution status of the target space even during ventilation using the total heat exchanger, ventilation is performed according to the air pollution status. It is particularly useful in the ventilation device that performs.

10 Ventilator 12 Total heat exchange element (heat exchanger)
DESCRIPTION OF SYMBOLS 20 Interior panel 30 Exhaust flow path 31 Exhaust flow path downstream space 31a Exhaust blower outlet 32 Exhaust flow path upstream space 32a Exhaust inlet 40 Supply air flow path 41 Supply air flow path upstream space 41a Supply air inlet 42 Side space 42a Air supply outlet 50 Ceiling surface 60 Carbon dioxide sensor (detection means)
70 Control unit (control unit)
99 Ceiling material SI Indoor (target space)
SO Outdoor

JP 2004-43035 A

Claims (5)

A ventilation device (10) for ventilating between an outdoor space (SO) and a target space (SI),
An air supply channel (40) for supplying air in the outdoor space (SO) to the target space (SI);
An air supply means (15) for generating an air flow toward the target space (SI) in the air supply flow path (40);
An exhaust passage (30) for discharging the air in the target space (SI) to the outdoors (SO);
An exhaust air blowing means (14) for generating an air flow toward the outdoor space (SO) in the exhaust flow path (30);
A heat exchanger (12) for exchanging heat without mixing the air passing through the air supply passage (40) and the air passing through the exhaust passage (30);
Detection means (60) for detecting a specific component contained in the air passing through the exhaust passage (30);
A control unit (70) for controlling at least one of the supply air blowing means (15) and the exhaust air blowing means (14) according to the detection result of the detection means (60);
Ventilation device (10) with A casing (11) for accommodating the heat exchanger (12) therein;
A surface (11b) on the target space (SI) side of the casing (11) includes a supply air outlet (42a) which is a downstream end of the supply channel (40), and the exhaust channel (30). An exhaust suction port (32a) which is an upstream end of
The detection means (60) is disposed on the downstream side of the heat exchanger (12) in the exhaust flow path (30).
The ventilation apparatus according to claim 1. The surface on the target space (SI) side of the casing (11) is a lower surface (11b) in the installation state of the casing,
The detection means (60) is disposed in the casing (11) and vertically above the lower surface (11b) and the heat exchanger (12).
The ventilation apparatus according to claim 2. The casing (12) is arranged such that the shortest distance between the heat exchanger (12) and the lower surface (11b) of the casing is shorter than the shortest distance between the heat exchanger (12) and the upper surface (11a) of the casing. 11) the position of the heat exchanger (12) within is defined,
The heat exchanger (12) is arranged in a posture for allowing the air flowing through the exhaust flow path (30) to pass from below to above,
The ventilation apparatus according to claim 3. The detection means (60) detects the concentration of carbon dioxide in the air.
The ventilator according to any one of claims 1 to 4.

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