WO2018179248A1

WO2018179248A1 - Ventilation device

Info

Publication number: WO2018179248A1
Application number: PCT/JP2017/013312
Authority: WO
Inventors: 諒 ▲高▼津; 一外川; 真海安田; 明利島▲崎▼
Original assignee: 三菱電機株式会社
Priority date: 2017-03-30
Filing date: 2017-03-30
Publication date: 2018-10-04
Also published as: JP6811842B2; JPWO2018179248A1

Abstract

This ventilation device comprises: a body provided with a supply air flow passage through which a supply air flow (7) flowing from the exterior to the interior of a room flows, the body being also provided with a discharge air flow passage through which a discharge air flow flowing from the interior to the exterior of the room flows; an air supply blower for generating the supply air flow in the supply air flow passage; and an air discharge blower for generating the discharge air flow in the discharge air flow passage. The ventilation device further comprises: a sensor section (30) provided in either the supply air flow passage or the discharge air flow passage and detecting temperature and/or humidity; and a guard section (33) surrounding the sensor section to guard the sensor section against an air flow which flows through the either the supply air flow passage or the discharge air flow passage, and provided with an opening (34) provided oriented in a direction different from the direction toward the upstream side of the air flow.

Description

Ventilation equipment

The present invention relates to a ventilation device including a sensor unit provided in an air passage.

A ventilation device provided with a sensor unit including a humidity sensor and a temperature sensor is known. The sensor unit detects the humidity of the air supplied from the outside or the exhaust from the room by a humidity sensor. The sensor unit detects the temperature of the air supply from the outside or the temperature of the exhaust from the room by a temperature sensor. The ventilation device controls the operation for supplying or exhausting air based on the detection result of the sensor unit.

∙ When highly humid air is sucked into the air path, water droplets may adhere to the sensor unit provided in the air path. In addition, foreign matters may be attached to the sensor unit provided in the air passage due to foreign matters mixed in the air sucked into the air passage. If water droplets or foreign substances stay in the sensor unit, the detection accuracy of the sensor unit may decrease. Since the ventilator is normally used in an environment where high-humidity air or air containing foreign matter can be sucked in, it is desired that the adhesion of water droplets and foreign matter to the sensor unit can be reduced.

Patent Document 1 discloses a technique for covering a moisture sensitive material of a humidity sensor, which is a gas sensor, with a filter. The humidity sensor detects humidity by measuring a change in electrical characteristics due to moisture being taken into the moisture sensitive material. The filter has a laminated structure of a water-soluble cationic polymer that is a water-soluble material and a water-soluble anionic polymer.

Patent Document 2 discloses a humidity detection unit including a storage structure that covers a humidity sensor mounted on a substrate with a case. A ventilation path which is a through hole for ventilation is provided in a region of the substrate covered with the case. Air outside the humidity detection unit is guided to the humidity sensor inside the case through the air passage.

JP 2002-90325 A Japanese Unexamined Patent Publication No. 2016-180601

When the sensor unit of the ventilator is covered with the filter disclosed in Patent Document 1, the filter may continue to be exposed to high-humidity air sucked into the ventilator. When the filter is used in a high humidity environment where deliquescence of the water-soluble material is likely to occur, deterioration of the filter is promoted. In addition, when the storage structure disclosed in Patent Document 2 is applied to the sensor unit provided in the air passage of the ventilation device, foreign matter contained in the airflow may enter the case from the through hole of the substrate. obtain. For this reason, in the techniques of

Patent Documents

1 and 2, it is difficult to perform detection with a stable accuracy over a long period of time by the sensor unit provided in the air passage of the ventilation device.

The present invention has been made in view of the above, and an object of the present invention is to obtain a ventilator that enables detection with a stable accuracy over a long period of time by a sensor unit provided in an air passage.

In order to solve the above-described problems and achieve the object, the ventilator according to the present invention includes an air supply air passage through which an air supply air flows from the outside to the room, and an exhaust air passage through which an exhaust air flow from the room to the outside passes. Are provided, a supply air blower that generates a supply air flow in the supply air passage, and an exhaust blower that generates an exhaust flow in the exhaust air passage. A ventilation device according to the present invention is provided in an air passage that is a supply air passage or an exhaust air passage, and detects a sensor unit that detects at least one of temperature and humidity, and an airflow that passes through the air passage by surrounding the sensor unit. And a guard part having an opening provided in a direction different from the direction toward the upstream side of the airflow.

The ventilator according to the present invention has an effect of being able to perform detection with a stable accuracy over a long period of time by a sensor unit provided in the air passage.

The figure which shows the structure of the ventilation apparatus concerning Embodiment 1 of this invention. The figure which shows the structure of the sensor unit shown in FIG. The perspective view which shows the guard part and sensor part which are shown in FIG. The figure which shows the structure of the sensor unit with which the ventilation apparatus concerning Embodiment 2 of this invention is equipped. The figure which shows the structure of the sensor unit with which the ventilation apparatus concerning Embodiment 3 of this invention is equipped.

Hereinafter, a ventilator according to an embodiment of the present invention will be described in detail with reference to the drawings. Note that the present invention is not limited to the embodiments.

Embodiment 1 FIG.
FIG. 1 is a diagram illustrating a configuration of a ventilation device 1 according to a first embodiment of the present invention. The ventilation device 1 includes a casing 2 which is a main body provided with an air supply air passage 3 through which an air supply air flow 7 from the outside to the room passes and an exhaust air passage 4 through which an exhaust air flow 8 from the room to the outside passes. The ventilator 1 also includes an air supply blower 5 that generates a supply airflow 7 in the supply airflow path 3 and an exhaust air blower 6 that generates an exhaust flow 8 in the exhaust airflow path 4. In FIG. 1, the state which looked at the component provided in the inside of the casing 2 from the top is represented typically.

An air supply outlet 9 and an exhaust air inlet 10 are provided in a main body side surface 18 that forms a side surface on the indoor side of the casing 2. An air supply inlet 11 and an exhaust outlet 12 are provided in the main body side surface 19 that forms the side surface on the outdoor side of the casing 2. The ventilator 1 operates the supply air blower 5 to take outdoor air from the supply air intake port 11 into the supply air passage 3 and generate a supply air flow 7. The air supply air 7 advances along the air supply air passage 3 and is blown out from the air supply outlet 9 into the room. The ventilator 1 operates the exhaust blower 6 to take indoor air from the exhaust suction port 10 into the exhaust air passage 4 and generate an exhaust flow 8. The exhaust stream 8 travels through the exhaust air passage 4 and is blown out from the exhaust outlet 12 toward the outside of the room.

The total heat exchanger 13 is provided in the supply air passage 3 and the exhaust air passage 4. The total heat exchanger 13 performs total heat exchange between the supply airflow 7 traveling in the supply air passage 3 and the exhaust airflow 8 traveling in the exhaust air passage 4. The total heat exchanger 13 includes a primary side air passage through which the exhaust flow 8 passes and a secondary side air passage through which the supply airflow 7 passes. In the total heat exchanger 13, the primary side air passage and the secondary side air passage intersect perpendicularly. In FIG. 1, the primary side air passage and the secondary side air passage are not shown.

The damper 14 includes, in the exhaust air passage 4, a first route 21 that goes from the exhaust suction port 10 into the total heat exchanger 13, and a second route 22 that goes from the exhaust suction port 10 to the outside of the total heat exchanger 13. Is provided at the branch. The damper 14 adjusts the opening degree of the first route 21 and the opening degree of the second route 22 by a rotating operation. When the damper 14 closes the second route 22, the exhaust flow 8 from the exhaust suction port 10 is guided to the first route 21 and passes through the total heat exchanger 13. When the damper 14 blocks the first route 21, the exhaust flow 8 from the exhaust suction port 10 is guided to the second route 22 and passes outside the total heat exchanger 13. The ventilator 1 adjusts the heat exchange between the air supply air flow 7 and the exhaust air flow 8 by adjusting the rotational position of the damper 14. FIG. 1 shows a state where the second route 22 is blocked by the damper 14 and the exhaust flow 8 is guided to the first route 21.

The ventilation device 1 includes a sensor unit 15 provided in the supply air passage 3 and a sensor unit 16 provided in the exhaust air passage 4. The sensor unit 15 is provided in a position near the supply air inlet 11 in the supply air passage 3. The sensor unit 15 includes a sensor unit that detects the temperature and humidity of the air supply air flow 7. The sensor unit 16 is provided at a position near the exhaust air inlet 10 in the exhaust air passage 4. The sensor unit 16 includes a sensor unit that detects the temperature and humidity of the exhaust stream 8. The sensor unit 15 may be provided at a position upstream of the total heat exchanger 13 in the supply air passage 3. The sensor unit 16 may be provided at a position upstream of the total heat exchanger 13 in the exhaust air passage 4.

The control unit 17 controls the ventilation device 1 as a whole. The control unit 17 controls the operation of the air supply blower 5 and the operation of the exhaust blower 6. The control unit 17 rotates the damper 14 based on the humidity and temperature of the supply airflow 7 detected by the sensor unit 15 and the humidity and temperature of the exhaust flow 8 detected by the sensor unit 16. The position may be controlled.

Next, the configuration of the sensor unit 15 will be described. The configuration of the sensor unit 16 is the same as the configuration of the sensor unit 15.

FIG. 2 is a diagram showing a configuration of the sensor unit 15 shown in FIG. The sensor unit 15 includes a sensor unit 30, a filter 32 that covers the sensor unit 30, and a guard unit 33 that surrounds the sensor unit 30 covered with the filter 32. The sensor part 30, the filter 32, and the guard part 33 are installed in the installation surface 24 in the casing 2 shown in FIG. The installation surface 24 is a horizontal surface of the main body upper surface portion 23 that covers the upper portion of the casing 2. FIG. 2 shows a cross section of the main body upper surface portion 23, the sensor portion 30 installed on the main body upper surface portion 23, the filter 32, and the guard portion 33. In addition, in FIG. 1, the ventilation apparatus 1 of the state from which the main body upper surface part 23 was removed is shown. The installation surface 24 is not limited to the surface of the main body upper surface portion 23, and may be a surface of a member provided in the air passage.

The sensor element section 31 of the sensor section 30 is provided with a humidity sensor that is a sensor element that detects humidity and a temperature sensor that is a sensor element that detects temperature. The humidity sensor includes a moisture sensitive film formed of a polymer material and an electrode that sandwiches the moisture sensitive film. One example of a humidity sensor is a polymer capacitive humidity sensor that detects humidity by measuring the capacitance according to the amount of moisture adsorbed on the moisture sensitive film. The humidity sensor may be a polymer resistance humidity sensor that detects the humidity by measuring the electrical resistance according to the amount of moisture adsorbed on the moisture sensitive film, or may be other humidity detecting means. One example of a temperature sensor is a thermistor. The temperature sensor may be a thermocouple or other temperature detection means. Note that a surface of the sensor unit 30 on which the sensor element unit 31 is provided is a front surface of the sensor unit 30.

The upper end of the filter 32 is joined to the installation surface 24. The upper surface of the sensor unit 30 is fixed to a region surrounded by the filter 32 in the installation surface 24. The entire periphery and the lower part of the sensor unit 30 in the horizontal direction are covered with a filter 32. In one example, the filter 32 includes a nonwoven fabric and a moisture permeable membrane that are permeable to air and water vapor. The moisture permeable membrane is coated on a nonwoven fabric. Polyester fibers, which are synthetic fibers, are used for the nonwoven fabric. For the nonwoven fabric, polyethylene or polypropylene, which is a synthetic fiber other than polyester fiber, may be used, and other sheet members capable of transmitting air and water vapor may be used.

A lot of fine pores are formed in the moisture permeable membrane. The moisture permeable membrane allows air and water vapor to pass through the air holes, and blocks foreign substances floating in the air and liquid moisture. The foreign material may include dust that is a solid material and a liquid material. One example of the liquid is a liquid oil. A polyurethane resin film is used for the moisture permeable film. The resin film may be a fluorine resin film, a polyethylene resin film, a polypropylene resin film, or a silicon resin film.

The air and water vapor for detecting humidity and temperature pass through the filter 32, so that the sensor unit 30 can detect the temperature and humidity of the air in the air passage. Further, the foreign substance and the water droplet are blocked by the moisture permeable film of the filter 32, so that the sensor unit 30 can prevent the foreign substance and the water droplet from adhering to each other. The filter 32 is not limited to the one that covers the entire sensor unit 30, but exposes an opening through which a lead connected to the sensor unit 30 passes or a connector for attaching and detaching the sensor unit 30 in the casing 2. May be provided. By exposing the connector from the filter 32, the sensor unit 30 can be easily attached and detached. In FIG. 2, the lead and the connector are not shown.

FIG. 3 is a perspective view showing the guard part 33 and the sensor part 30 shown in FIG. 3, illustration of components other than the guard part 33 and the sensor part 30 among the components shown in FIG. 2 is omitted. In FIG. 3, the sensor unit 30 disposed inside the guard unit 33 is indicated by a broken line.

The guard unit 33 surrounds the sensor unit 30 to guard the sensor unit 30 from the airflow passing through the air path. An opening 34 is provided on the lower surface of the guard portion 33. The guard part 33 surrounds the sensor part 30 covered with the filter 32 shown in FIG. 2 from the horizontal direction. Further, since the opening 34 is provided, the lower part of the sensor unit 30 is opened to the air passage.

The guard portion 33 is a cylindrical body having a rectangular parallelepiped outer shape and a hollow inside. A flange 35 is provided at the upper end 25 of the guard portion 33. The guard portion 33 is fixed to the installation surface 24 by screwing the flange 35 to the installation surface 24 shown in FIG. The guard part 33 may be fixed to the installation surface 24 using a fixing member other than a screw. 2 and 3, illustration of a fixing member for fixing the guard portion 33 is omitted. Since the upper end 25 of the guard part 33 is joined to the installation surface 24, the upper part of the sensor part 30 is closed by the main body upper surface part 23. The lower end 37 of the sensor unit 30 is located vertically above the opening 34.

It is assumed that the traveling direction of the air supply air 7 at the position where the sensor unit 15 is installed in the air supply air passage 3 is the horizontal direction. The opening 34 is provided in a direction different from the direction toward the upstream side of the air supply air 7. In FIG. 2, the direction of the air supply 7 toward the upstream side is the left direction from the guard portion 33. The opening 34 is directed vertically downward, which is a direction different from the direction toward the upstream side of the air supply 7. The vertically downward direction, which is the direction of the opening 34, is also a direction perpendicular to the traveling direction of the air supply 7 toward the guard portion 33.

Since the guard part 33 is provided, the air supply air 7 that has traveled toward the sensor unit 15 passes through and around the guard part 33. By the opening 34 being directed vertically downward, it is possible to reduce the air supply air 7 that directly enters the guard part 33 after traveling toward the guard part 33. Thereby, the sensor unit 15 can reduce the foreign material which flows with the air supply flow 7 and intrudes into the guard portion 33.

In the vicinity of the lower end 36 of the guard portion 33, separation occurs between the air flow 38 that passes under the guard portion 33 and the air flow 39 that remains inside the guard portion 33. A lower end 36 on the upstream side of the supply airflow 7 in the guard portion 33 is a separation point of the

airflows

38 and 39. The air flow 39 swirls in the vicinity of the opening 34. When the airflow 39 that has passed through the filter 32 reaches the sensor unit 30, the sensor unit 30 detects the temperature and humidity of the air in the supply air passage 3.

Most of the foreign matter having a mass flows on the airflow 38 below the peeling point from the airflow 39 above the peeling point. Since most of the foreign matter passes below the guard part 33, entry of the foreign substance from the opening 34 into the guard part 33 is reduced. By setting the lower end 37 of the sensor unit 30 vertically above the opening 34, the foreign matter that enters the position of the sensor unit 30 can be reduced even if foreign matter enters from the opening 34. Further, since the sensor unit 30 is covered with the filter 32, the adhesion of foreign matter to the sensor unit 30 can be reduced.

When the supply airflow 7 hits the guard part 33, foreign matter and water droplets may adhere to the surface of the guard part 33. Foreign matter and water droplets adhering to the guard part 33 travel downward through the guard part 33 due to the influence of gravity and fall from the lower end 36 of the guard part 33. Since the opening 34 is directed downward, the sensor unit 15 can reduce foreign matters and water droplets that enter the guard portion 33 through the surface of the guard portion 33. In addition, the sensor unit 15 can reduce foreign matters and water droplets staying around the sensor unit 15 in the installation surface 24. The sensor unit 15 can reduce the intrusion of foreign matter and water droplets into the guard portion 33 when the operation is stopped as well as during the operation of the ventilation device 1.

The sensor unit 15 can be installed at an arbitrary position of the supply air passage 3 in the upper surface portion 23 of the main body. Similar to the sensor unit 15, the sensor unit 16 can be installed at an arbitrary position of the exhaust air passage 4 in the main body upper surface portion 23. The upper part of the guard part 33 is blocked by the main body upper surface part 23 which is a part of the main body, so that the constituent member of the guard part 33 is compared with the case where the upper surface part of the guard part 33 is provided separately from the constituent members of the main body. Can be reduced.

Temporarily, when the sensor unit 30 of the

sensor units

15 and 16 is exposed in the air path, the airflow passing through the air path always comes into contact with the sensor unit 30. The airflow taken into the air path can include foreign matters floating in the air and liquid moisture. A lot of moisture is contained in the outside air when fog is generated or during rainfall. When an air stream containing a lot of moisture is taken in, water droplets due to condensation may occur. Further, static electricity generated by energization of the sensor unit 30 may attract foreign substances and water droplets to the sensor unit 30. When the sensor unit 30 is exposed in the air path, there is a high possibility that foreign matters and water droplets included in the airflow adhere to the sensor element unit 31. Even when the front surface of the sensor unit 30 is directed to the downstream side of the airflow, foreign substances and water droplets may enter the sensor element unit 31 due to the accumulation of foreign substances and water droplets on the sensor unit 30. .

The sensor unit 30 may cause a shift in detection result due to a decrease in sensitivity or a deterioration in responsiveness due to the entry of water droplets or foreign matter into the sensor element unit 31. When such a decrease in detection accuracy or abnormality in detection occurs in the sensor unit 30, the ventilation device 1 needs to replace the sensor unit 30. In the ventilation device 1, the frequency of replacement of the sensor unit 30 is increased, so that the burden of work for replacement of the sensor unit 30 is increased, and the life cycle cost is increased.

Since the sensor unit 30 of the

sensor units

15 and 16 is provided with the guard unit 33 and the filter 32, high dust resistance can be obtained and water wetting can be reduced. The sensor unit 30 can reduce foreign substances and water droplets that enter the sensor element unit 31 as compared to the case where the sensor unit 30 is exposed to the air passage. Thereby, the

sensor units

15 and 16 can detect temperature and humidity with stable accuracy. The ventilation device 1 can perform operation control suitable for temperature and humidity based on the detection results of the

sensor units

15 and 16.

The ventilator 1 removes foreign matter by cleaning the guard portion 33 even if foreign matter adheres to the guard portion 33. In the ventilator 1, when foreign matter adheres to the filter 32, the foreign matter is removed by cleaning the filter 32 or replacing the filter 32. Thereby, the ventilator 1 can use the sensor unit 30 over a long period of time. The ventilation device 1 can reduce the life cycle cost by reducing the frequency of replacement of the sensor unit 30. In the case where the intrusion of foreign matter and water droplets into the sensor element unit 31 can be reduced by the guard unit 33, the

sensor units

15 and 16 may omit the filter 32.

The opening 34 may be directed in a direction other than the vertically downward direction. The opening 34 only needs to be provided in a direction different from the direction toward the upstream side of the supply airflow 7, or may be provided in the direction toward the downstream side of the supply airflow 7. In FIG. 2, the direction of the air supply air 7 toward the downstream side is the right direction from the guard portion 33. The opening 34 may be oriented in the horizontal direction, which is the front side in FIG. 2 or the back side in FIG.

The guard part 33 may be a cylinder having an outer shape other than a rectangular parallelepiped. The guard part 33 may be a cylindrical body having a cylindrical or elliptical columnar outer shape. The guard part 33 having the opening 34 directed downward is installed in the air path in which the air flow proceeds vertically downward from the

sensor units

15 and 16 installed in the air path in which the air flow proceeds in the horizontal direction. The

sensor units

15 and 16 may be provided.

The sensor unit 30 is not limited to detecting temperature and humidity, and may detect one of temperature and humidity. The sensor element unit 31 includes at least one of a temperature sensor and a humidity sensor. The ventilation device 1 may include a sensor unit 30 that detects humidity separately from the sensor unit 30 that detects temperature. The guard part 33 and the filter 32 should just be provided in at least one of the sensor part 30 which detects temperature, and the sensor part 30 which detects humidity. Moreover, the guard part 33 and the filter 32 should just be provided in at least one of the sensor unit 15 and the sensor unit 16. FIG. The guard portion 33 is not limited to the surface of the main body upper surface portion 23 and may be provided on the side surface of the main body. At least one of the

sensor units

15 and 16 may be provided on a side surface of the main body.

The ventilation device 1 is not limited to the one provided with both the sensor unit 15 and the sensor unit 16, and may be provided with one of the sensor unit 15 and the sensor unit 16. The ventilation device 1 can perform operation control suitable for temperature or humidity by enabling temperature or humidity to be detected with stable accuracy by at least one of the sensor unit 15 and the sensor unit 16.

According to the first embodiment, the ventilation device 1 is provided with the guard unit 33 that guards the sensor unit 30 provided in the air path from the airflow, thereby reducing adhesion of foreign matter and water droplets to the sensor unit 30. it can. Thereby, the ventilator 1 has an effect that the sensor unit 30 provided in the air passage can perform detection with stable accuracy over a long period of time.

Embodiment 2. FIG.
FIG. 4 is a diagram illustrating a configuration of the sensor unit 40 provided in the ventilation device 1 according to the second embodiment of the present invention. The sensor unit 40 includes a guard part 41 different from the guard part 33 shown in FIG. The opening 42 of the guard part 41 is provided in the guard side part 45. The same parts as those in the first embodiment are denoted by the same reference numerals, and redundant description is omitted. The sensor unit 40 is provided in the air path that is the supply air path 3 or the exhaust air path 4 shown in FIG.

The sensor unit 40 includes a sensor unit 30, a filter 32 that covers the sensor unit 30, and a guard unit 41 that surrounds the sensor unit 30 covered with the filter 32. The sensor part 30, the filter 32, and the guard part 41 are installed in the installation surface 27 in the casing 2 shown in FIG. The installation surface 27 is a vertical surface of the main body side surface portion 26 that covers the side portion of the casing 2. FIG. 4 shows a cross section of the main body side surface portion 26, the sensor portion 30 installed on the main body side surface portion 26, the filter 32, and the guard portion 41. The installation surface 27 may be a surface of a member other than the main body side surface portion 26.

The side end of the filter 32 is joined to the installation surface 27. The side surface of the sensor unit 30 is fixed to a region surrounded by the filter 32 on the installation surface 27. The sensor portion 30 is entirely covered with a filter 32 in the horizontal direction, in the horizontal direction, above and below.

The guard unit 41 surrounds the sensor unit 30 to guard the sensor unit 30 from the airflow 46 passing through the air path. The guard portion 41 includes a guard side surface portion 45 that forms a side surface directed in the horizontal direction, and a guard lower surface portion 43 that forms a lower surface. A flange 35 is provided at the side end 28 of the guard portion 41 opposite to the guard side surface portion 45. The guard portion 41 is fixed to the installation surface 27 by fixing the flange 35 to the installation surface 27 using a fixing means. In FIG. 4, illustration of the fixing member is omitted. Since the side end 28 of the guard part 41 is joined to the installation surface 27, the side of the sensor part 30 opposite to the guard side part 45 is closed by the main body side part 26.

The opening 42 is provided in a vertically lower portion of the guard side surface 45. The outer edge of the opening 42 includes a guard side surface portion 45 and a guard lower surface portion 43. A lower end 51 of the opening 42 is included in the guard lower surface 43. The lower end 51 protrudes in the lateral direction from the portion of the guard side surface 45 that is vertically above the opening 42. Here, the horizontal direction is a direction away from the installation surface 24 in the horizontal direction, and is a direction from right to left in FIG. The guard lower surface portion 43 is inclined so as to have a downward slope from the side end 28 toward the lower end 51.

It is assumed that the traveling direction of the air flow 46 at the position where the sensor unit 40 is installed in the air path is a vertically upward direction. The opening 42 is directed in a lateral direction that is different from a vertical downward direction that is an upstream direction of the airflow 46. The lateral direction as the direction of the opening 42 is also a direction perpendicular to the traveling direction of the airflow 46 toward the guard portion 41. Since the opening 42 is directed in the lateral direction, it is possible to reduce the airflow 46 that directly enters the inside of the guard part 41 after traveling toward the guard part 41. Thereby, the sensor unit 40 can reduce foreign matters that flow together with the airflow 46 and enter the inside of the guard portion 41.

In the vicinity of the lower end 44 of the guard part 41, separation occurs between the airflow 47 passing through the lateral side of the guard part 41 and the airflow 48 staying inside the guard part 41. The lower end 44 serves as a separation point for the

airflows

47 and 48. The air flow 48 swirls in the vicinity of the opening 42. When the airflow 48 that has passed through the filter 32 reaches the sensor unit 30, the sensor unit 30 detects the temperature and humidity of the air in the air passage. By projecting the lower end 51 of the opening 42 in the lateral direction, the air flow 47 is largely pulled away from the opening 42 in the lateral direction. Thereby, the airflow 46 which directly enters the guard part 41 can be reduced.

By tilting the guard lower surface portion 43, the foreign matter and water droplets adhering to the guard lower surface portion 43 are transmitted toward the lower end 44 due to the influence of gravity and fall from the lower end 44. The sensor unit 40 can reduce foreign matters and water droplets that enter the guard portion 41 along the surface of the guard portion 41. In addition, the sensor unit 40 can reduce foreign matters and water droplets that stay around the sensor unit 40 in the installation surface 27.

Since the sensor unit 30 of the sensor unit 40 is provided with the guard unit 41 and the filter 32, high dust resistance can be obtained and water wetting can be reduced. Thereby, the sensor unit 40 can detect temperature and humidity with stable accuracy. The ventilation device 1 can perform operation control suitable for temperature and humidity based on the detection result of the sensor unit 40. In the case where the intrusion of foreign matter and water droplets into the sensor element unit 31 can be reduced by the guard unit 41, the sensor unit 40 may omit the filter 32.

According to the second embodiment, the ventilator 1 is provided with the guard part 41 that guards the sensor part 30 provided in the air passage from the airflow, thereby reducing adhesion of foreign matter and water droplets to the sensor part 30. it can. Thereby, the ventilator 1 has an effect that the sensor unit 30 provided in the air passage can perform detection with stable accuracy over a long period of time.

Embodiment 3 FIG.
FIG. 5 is a diagram illustrating a configuration of the sensor unit 60 provided in the ventilation device 1 according to the third embodiment of the present invention. The opening 62 of the guard part 61 provided in the sensor unit 60 is provided in the guard lower surface part 63. The same parts as those in the first embodiment are denoted by the same reference numerals, and redundant description is omitted. The sensor unit 60 is provided in the air path that is the supply air path 3 or the exhaust air path 4 shown in FIG.

The sensor unit 60 includes a sensor unit 30, a filter 32 that covers the sensor unit 30, and a guard unit 61 that surrounds the sensor unit 30 covered with the filter 32. The sensor unit 30, the filter 32, and the guard unit 61 are installed on the installation surface 27. The guard unit 61 surrounds the sensor unit 30 to guard the sensor unit 30 from the airflow 66 that passes through the air path.

The flange 35 provided at the side end 28 of the guard part 61 is fixed to the installation surface 27 using a fixing means. In FIG. 5, illustration of the fixing member is omitted. The guard portion 61 includes a guard side surface portion 64 that forms a side surface opposite to the side end 28 and a guard lower surface portion 63 that forms a lower surface.

The guard lower surface portion 63 is inclined so as to descend downward from the guard side surface portion 64 side toward the installation surface 27 side. A space between the lower end 65 of the guard lower surface portion 63 and the installation surface 27 is open to the air path. The opening 62 is an open portion between the lower end 65 of the guard lower surface portion 63 and the installation surface 27. The outer edge of the opening 62 includes a guard lower surface 63 and an installation surface 27.

Here, in FIG. 5, the direction toward the upper right is the first upper oblique direction, the direction toward the upper left is the second upper oblique direction, the direction toward the lower right is the first oblique lower direction, and the left The direction going diagonally downward is defined as a second diagonally downward direction. The traveling direction of the airflow 66 toward the position where the sensor unit 60 is installed in the air path is the first obliquely upward direction. The airflow 66 that has reached the guard portion 61 is branched into an airflow 67 that travels upward and an airflow 68 that travels in the first diagonally downward direction. The opening 62 is directed downward in the second oblique direction. The opening 62 is directed in a second obliquely downward direction, which is a direction different from the second obliquely upward direction that is the upstream direction of the airflow 68 in the vicinity of the opening 62. Since the opening 62 is directed downward in the second oblique direction, it is possible to reduce the airflow 66 that directly enters the inside of the guard portion 61 after traveling toward the guard portion 61. As a result, the sensor unit 60 can reduce foreign matter that flows together with the airflow 66 and enters the inside of the guard portion 61.

In the vicinity of the lower end 65 of the guard lower surface portion 63, separation occurs between the air flow 68 passing through the second diagonally lower side from the lower end 65 and the air flow 69 staying inside the guard portion 61. The lower end 65 serves as a separation point for the

air currents

68 and 69. The air flow 69 swirls in the vicinity of the opening 62. When the airflow 69 that has passed through the filter 32 reaches the sensor unit 30, the sensor unit 30 detects the temperature and humidity of the air in the air passage.

Most of the foreign matter having a mass flows on an airflow 68 downward from the separation point, instead of an airflow 69 upward from the separation point. Thereby, the sensor unit 60 can reduce the intrusion of foreign matter from the opening 62 into the guard portion 61.

By tilting the guard lower surface portion 63, the foreign matter and water droplets adhering to the guard lower surface portion 63 are transmitted toward the lower end 65 due to the influence of gravity and fall from the lower end 65. The sensor unit 60 can reduce foreign matter and water droplets that enter the guard unit 61 along the surface of the guard unit 61.

The sensor unit 30 of the sensor unit 60 is provided with the guard unit 61 and the filter 32, so that high dust resistance can be obtained and water wetting can be reduced. Thereby, the sensor unit 60 can detect temperature and humidity with stable accuracy. The ventilation device 1 can perform operation control suitable for temperature and humidity based on the detection result of the sensor unit 60. In the case where the intrusion of foreign matter and water droplets into the sensor element unit 31 can be reduced by the guard unit 61, the sensor unit 60 may omit the filter 32.

According to the third embodiment, the ventilator 1 is provided with the guard unit 61 that guards the sensor unit 30 provided in the air passage from the airflow, thereby reducing adhesion of foreign matter and water droplets to the sensor unit 30. it can. Thereby, the ventilator 1 has an effect that the sensor unit 30 provided in the air passage can perform detection with stable accuracy over a long period of time.

The configuration described in the above embodiment shows an example of the contents of the present invention, and can be combined with another known technique, and can be combined with other configurations without departing from the gist of the present invention. It is also possible to omit or change the part.

1 Ventilator, 2 Casing, 3 Supply air passage, 4 Exhaust air passage, 5 Supply air blower, 6 Exhaust air blower, 7 Supply air flow, 8 Exhaust flow, 9 Supply air outlet, 10 Exhaust air inlet, 11 Supply air inlet , 12 exhaust outlet, 13 total heat exchanger, 14 damper, 15, 16, 40, 60 sensor unit, 17 control unit, 18, 19, 26 main body side, 21 first route, 22 second route, 23 main body upper surface part, 24, 27 installation surface, 25 upper end, 28 side end, 30 sensor part, 31 sensor element part, 32 filter, 33, 41, 61 guard part, 34, 42, 62 opening part, 35 flange, 36 37, 44, 51, 65 Lower end, 38, 39, 46, 47, 48, 66, 67, 68, 69 Airflow, 43, 63 Guard bottom surface, 45, 64 Guard side portion.

Claims

A main body provided with an air supply air passage through which an air supply air flow from the outside to the room and an exhaust air passage through which an exhaust air flow from the room to the outside passes;
An air supply blower for generating the air supply air flow in the air supply air passage;
An exhaust blower for generating the exhaust flow in the exhaust air passage;
A sensor unit that is provided in an air path that is the supply air path or the exhaust air path, and that detects at least one of temperature and humidity;
Guarding the sensor part from the airflow passing through the air passage by surrounding the sensor part, and having a guard part provided with an opening provided in a direction different from the direction to the upstream side of the airflow. Features ventilator.
The ventilator according to claim 1, wherein the opening is directed in a direction perpendicular to a traveling direction of the airflow in the air passage.
The traveling direction of the airflow is a horizontal direction,
The ventilation device according to claim 2, wherein the opening is directed vertically downward.
The ventilator according to claim 3, wherein an upper end of the guard part is fixed to an installation surface of the guard part in the main body.
The ventilator according to claim 4, wherein the lower end of the sensor part is located vertically above the opening.
The traveling direction of the airflow is vertically upward,
The guard portion includes a guard side surface portion that forms a side surface oriented in the horizontal direction,
The ventilation device according to claim 1 or 2, wherein the opening is provided in the guard side surface.
The ventilator according to claim 6, wherein a lower end of the opening protrudes in a horizontal direction from a portion of the guard side surface that is vertically above the opening.
A side end opposite to the guard side surface portion of the guard portion is fixed to an installation surface of the guard portion in the main body,
The ventilator according to claim 6 or 7, wherein the guard portion includes a guard lower surface portion that forms a lower surface that is inclined downwardly from the side end toward the lower end of the opening.
The direction of travel of the airflow is obliquely upward,
A side end of the guard part is fixed to an installation surface of the guard part in the main body,
The guard portion includes a guard side surface portion that forms a side surface opposite to the side end, and a guard lower surface portion that forms a lower surface that is inclined downward from the guard side surface portion toward the installation surface,
The ventilation device according to claim 1 or 2, wherein the opening is provided in the lower surface of the guard.
The ventilation apparatus according to any one of claims 1 to 9, further comprising a filter that includes a moisture permeable membrane that is permeable to air and water vapor and covers the sensor unit.