JP2007170713A - Heat exchange type ventilation device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To perform flow passage changeover executed by the detection of an air supply temperature when ice is on a heat exchanger and an exhaust temperature when the ice is melted at a low cost and by a simplified circuit. <P>SOLUTION: This heat exchange type ventilator comprises a flow changeover unit 22 including: a partitioning plate 11 for partitioning the exhaust passage 9 and the air supply passage 10; an exhaust damper 16 for opening and closing an exhaust opening 12, an air supply damper 17 for opening and closing an air supply opening 14, a circulation damper 19 for opening and closing a circulation opening 18 formed at the partitioning plate 11, and a temperature sensor 25 provided near the circulation opening 12 in the air supply passage 10. The low-cost heat exchange type ventilation device with the simplified circuit can be obtained by detecting the temperature of an air flow when ice is formed on the heat exchanger 5 and the temperature of an exhaust flow when the ice is melted by the temperature sensor 25 and opening and closing each of the dampers 16, 17, and 19. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a heat exchange type ventilator used in a low temperature area or the like.

  Conventionally, a freeze prevention device for a ventilator is known as an example of this type of heat exchange ventilator (see, for example, Patent Document 1).

  Hereinafter, the antifreezing device of the ventilation device will be described with reference to FIG.

As shown in the figure, a low-temperature channel 102 and a high-temperature channel 103 are formed inside a box 101 by partitioning with a partition plate 104, and a low-temperature channel inlet 105 and a high-temperature channel are formed on one side of the box 101. An inlet 106 is provided, and a cold channel outlet 107 and a hot channel outlet 108 communicating with a conventionally known heat exchange type ventilator equipped with a heat exchanger (not shown) are provided on the other side surface. An opening 109 for communicating the formed low temperature channel 102 and the high temperature channel 103, a damper 110 for alternately opening and closing the low temperature channel inlet 105, and a damper 111 for alternately opening and closing the opening 109 and the high temperature channel outlet 108 are provided. Provided. Then, a temperature detector 112 for detecting the temperature (preset) at which the heat exchanger freezes is provided at the low-temperature channel inlet 105, and when this generates an output, the control device 113 operates, and the dampers 110, 111 are driven by the drive mechanism 114. The low-temperature channel inlet 105 and the high-temperature channel outlet 108 are closed and rotated so as to open the opening 109, and this is intermittently repeated at predetermined time intervals.
Japanese Utility Model Publication No. 62-17743 (page 10, Fig. 3)

  In such a conventional antifreezing device for a ventilator, the temperature detector 112 is provided at the low-temperature channel inlet 105 to detect the temperature of the low-temperature supply airflow, and the exhaust flow for melting the ice in the heat exchanger is detected. Is not detected, and there is a problem that a control device such as a timer is required to close the opening 109 and open the low-temperature channel inlet 105 and the high-temperature channel outlet 108. It is required to be able to detect the temperature of the exhaust stream and the temperature of the exhaust stream when the ice in the heat exchanger melts.

  The present invention solves such a conventional problem, and detects the temperature of the low-temperature air flow when the heat exchanger freezes and the temperature of the exhaust flow when the ice is melted, and switches the flow path. It aims at providing the heat exchange type ventilator which can be performed by the circuit simplified at low cost.

  In order to achieve the above object, the heat exchange ventilator of the present invention achieves the above object, a heat exchanger for exchanging heat between an indoor exhaust flow and an air supply air flow from the outside, an exhaust fan for forming the exhaust flow, An exhaust damper provided with an air supply fan that forms an air supply airflow, a partition plate that divides the exhaust air flow path and the air supply flow path, an exhaust opening through which the exhaust air flow passes, and is provided in the exhaust air flow path An intake damper receiver that opens and closes the exhaust opening, and an air supply damper that opens and closes the air supply opening. A circulation opening that opens in the partition plate so as to communicate the exhaust passage and the air supply passage, a circulation damper that opens and closes the circulation opening, a damper motor that opens and closes each damper, and detects an air temperature, A sensor that controls the opening and closing of each damper. A flow path switching unit provided with a surr means, and the sensor means is provided at a position where the air flow in the air flow path of the flow path switching unit and the circulating flow passing through the circulation opening are in contact with each other. It is.

  By this means, it is possible to detect the temperature of the cold supply airflow and the temperature of the exhaust flow when the ice in the heat exchanger melts, and to control the opening and closing of each damper to switch the flow path, reducing the cost and electric circuit It is possible to obtain a heat exchange type ventilator that can simplify the process.

  Another means is that the sensor means is formed by one temperature sensor.

  By this means, a heat exchange type ventilator capable of reducing the cost and simplifying the electric circuit can be obtained.

  As another means, the sensor means is formed by a temperature sensor having a C contact.

  By this means, it is possible to obtain a heat exchange type ventilator that can utilize the driving force of the damper motor and reduce the cost and simplify the electric circuit in both cases of opening and closing each damper.

  In another means, the sensor means is surrounded by a heat insulating material.

  By this means, it is possible to adjust the sensitivity of the sensor means and to freely adjust the opening / closing time of the damper, and it is possible to obtain a heat exchange type ventilation apparatus capable of reducing the cost and simplifying the electric circuit.

  The other means is provided with an enclosure so that the air supply does not directly contact the sensor means.

  By this means, it is possible to adjust the sensitivity of the sensor means and to freely adjust the opening / closing time of the damper, and it is possible to obtain a heat exchange type ventilation apparatus capable of reducing the cost and simplifying the electric circuit.

  The other means is provided with an enclosure so that the circulating flow through the circulation opening does not directly contact the sensor means.

  By this means, it is possible to adjust the sensitivity of the sensor means and to freely adjust the opening / closing time of the damper, and it is possible to obtain a heat exchange type ventilation apparatus capable of reducing the cost and simplifying the electric circuit.

  In another means, a part of the circulation damper is formed to serve as an enclosure for the sensor means.

  By this means, it is possible to adjust the sensitivity of the sensor means and to freely adjust the opening / closing time of the damper, and it is possible to obtain a heat exchange type ventilation apparatus capable of reducing the cost and simplifying the electric circuit.

  Another means is to provide a circulating damper with sensor means.

  By this means, it is possible to obtain a heat exchange type ventilator capable of adjusting the sensitivity of the sensor means and freely adjusting the opening / closing time of the damper at the mounting position of the sensor means, and reducing the cost and simplifying the electric circuit. .

  Another means is that the sensor means is waterproofed.

  By this means, a heat exchange type ventilator capable of preventing dew condensation water from entering the sensor means is obtained.

  ADVANTAGE OF THE INVENTION According to this invention, the heat exchange type | formula ventilation apparatus with the effect that the cost reduction of a flow-path switching unit and simplification of an electric circuit can be aimed at can be provided.

  In addition, it is possible to provide a heat exchange type ventilator that has an effect of freely adjusting the opening / closing time of the damper.

  In addition, it is possible to provide a heat exchange type ventilator having an effect that the opening / closing time of the damper can be adjusted without providing an enclosure for the sensor means.

  Further, it is possible to provide a heat exchange type ventilator that is effective in preventing the dew condensation water from entering the temperature sensor.

  The invention according to claim 1 of the present invention includes an indoor exhaust flow, a heat exchanger for exchanging heat of a supply air flow from the outside, an exhaust fan for forming the exhaust flow, and a supply for forming the supply air flow. A ventilation unit provided with a blower for air, a partition plate that divides the exhaust passage and the supply passage, an exhaust opening through which the exhaust flow passes, and an exhaust damper receiver provided in the exhaust passage, and the supply air flow A supply damper receiver provided in the supply passage, an exhaust damper for opening and closing the exhaust opening, an intake damper for opening and closing the supply opening, the exhaust passage and the supply passage A circulation opening that opens in the partition plate so as to communicate with the air flow path, a circulation damper that opens and closes the circulation opening, a damper motor that opens and closes each damper, and an air temperature that is detected and controls the opening and closing of each damper Sensor means to perform A flow path switching unit, wherein the sensor means is provided at a position where the air flow of the flow path switching unit and the circulating flow passing through the circulation opening are in contact with each other. Since the two types of indoor airflow directly contact the sensor means, the sensor means detects the temperature of the supply airflow and the temperature of the circulating flow, and opens and closes each damper to switch between the introduction of outdoor air and the circulation of indoor air. This eliminates the need for a timer or the like for switching between the introduction of outdoor air and the circulation of room air, and has the effect of reducing costs and simplifying the electrical circuit.

  Further, in the invention described in claim 2, the sensor means is formed by one temperature sensor, and originally two temperature sensors are necessary to sense the temperature of two kinds of air currents. On the other hand, the temperature of two types of air currents can be sensed by one temperature sensor, and the cost can be reduced and the circuit can be simplified.

  In the invention according to claim 3, the sensor means is formed of a temperature sensor having a C contact, and the contact of the temperature sensor can be switched in accordance with the temperature of the abutting airflow. Even in this case, the damper motor can be energized, so that each damper can be opened and closed using the driving force of the damper motor, and can be opened and closed more reliably without losing wind pressure than when using a spring or the like. In addition, it is possible to prevent the generation of sound when the damper is opened and closed, and each damper can be opened and closed with one temperature sensor, so that the cost can be reduced and the electric circuit can be simplified.

  According to the invention of claim 4, the sensor means is surrounded by a heat insulating material, and the reaction time of the sensor means can be adjusted depending on the type and thickness of the heat insulating material, so the sensitivity of the sensor means is adjusted. It is possible to freely adjust the opening / closing time of the damper and eliminate the need for a timer or the like, thereby reducing the cost and simplifying the electric circuit.

  Further, the invention described in claim 5 is provided with an enclosure so that the supply airflow is not in direct contact with the sensor means, and the reaction time of the sensor means is shortened when the supply airflow is directly applied. Since it becomes longer when it is not hit, the opening / closing time of each damper can be freely adjusted, and a timer or the like is not required, thereby reducing the cost and simplifying the electric circuit.

  The invention described in claim 6 is provided with an enclosure so that the circulating flow passing through the circulation opening does not directly contact the sensor means, and the reaction time of the sensor means is shortened when the circulating flow is directly applied. In addition, since it becomes longer when the circulating flow is not directly applied, the opening / closing time of each damper can be freely adjusted, a timer or the like is not required, and the cost can be reduced and the electric circuit can be simplified. It has the action.

  According to a seventh aspect of the present invention, a part of the circulation damper is formed to serve as an enclosure for the sensor means, and the enclosure is provided in the sensor means when the circulation damper is closed, Since the sensor means does not directly contact the sensor means, the response time of the sensor means becomes longer, so the opening / closing time of each damper can be freely adjusted, and no timer is required, reducing costs and simplifying the electrical circuit. It has the effect | action that can be aimed at.

  In the invention according to claim 8, the sensor means is provided in the circulation damper, and the sensor means can be adjusted and provided in a place where the airflow directly hits or is not hit directly. Therefore, the opening / closing time of each damper can be adjusted freely, a timer or the like is not required, and the cost can be reduced and the electric circuit can be simplified.

  Further, the invention according to claim 9 is provided with waterproof measures for the sensor means and prevents water from entering the sensor means, so that it is possible to prevent water from entering even if dew condensation occurs. , Has the effect of increasing safety.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

(Embodiment 1)
As shown in FIGS. 1 to 4, the indoor side exhaust port 1 and the indoor side air supply port 2 are provided on the indoor side of one side surface, and the exhaust connection port 3 and the air supply connection port 4 are provided on the other side surface. A heat exchanger 5 that exchanges heat between the exhaust flow from the room and the supply air flow from the outside, an exhaust fan 6 that forms the exhaust flow, and an air supply fan 7 that forms the supply air flow are provided inside. An exhaust passage 9 provided with a ventilation unit 8, connected to the exhaust connection port 3 of the ventilation unit 8, and a partition plate 11 that partitions the supply passage 10 connected to the supply connection port 4 of the ventilation unit 8; An exhaust damper receiver 13 provided in the exhaust flow path 9 having an exhaust opening 12 through which the exhaust flow passes, and an air supply damper receiver 15 provided in the air supply flow path 10 having an air supply opening 14 through which the supply air flow passes, An exhaust damper 16 for opening and closing the exhaust opening 12, an air supply damper 17 for opening and closing the air supply opening 14, and an exhaust A circulation opening 18 opened in the partition plate 11 so as to communicate the flow path 9 and the air supply flow path 10, a circulation damper 19 that opens and closes the circulation opening 18, an outdoor exhaust outlet 20 on the outdoor side, and an outdoor air supply opening A flow path switching unit 22 provided with 21 is provided.

  Further, the exhaust damper 16, the air supply damper 17 and the circulation damper 19 are integrally provided so as to be opened and closed at the same time, and the damper motor 23 for simultaneously opening and closing the exhaust damper 16, the air supply damper 17 and the circulation damper 19 is connected to the exhaust passage. 9 is provided.

  A sensor means 24 for detecting the air temperature is provided in the vicinity of the circulation opening 18 in the flow path switching unit 22. The sensor means 24 is formed by a temperature sensor 25 having one C contact, and as shown in the electric circuit diagram of FIG. 4, the sensor means 24 is electrically connected between the temperature sensor 25 having the C contact and the damper motor 23 alternately. When the limit switch 26 in which the first limit switch 26a and the second limit switch 26b are provided in parallel is connected in series and the exhaust damper 16 and the supply damper 17 are in the closed position, the first limit switch 26a is closed. The first limit switch 26a is opened when the state is detected, the power supply circuit of the damper motor 23 is opened, and energization to the damper motor 23 is stopped.

  In the above configuration, when a normal heat exchange ventilation operation is performed, as shown in FIG. 1, when the heat exchange type ventilator is operated with the exhaust damper 16 and the air supply damper 17 open and only the circulation damper 19 closed, The indoor air heated by the exhaust fan 6 is sucked into the ventilation unit 8 from the indoor exhaust port 1, and the exhaust air passes through one passage of the heat exchanger 5 and flows through the flow path switching unit 22. The air is exhausted from the outdoor exhaust port 20 through the passage 9 to the outside. On the other hand, outdoor air flows into the air supply passage 10 from the outdoor air supply port 21 by the air supply blower 7, passes through the other passage in the heat exchanger 5 provided in the ventilation unit 8 from the air supply passage 10, Air is supplied into the room through the indoor air supply port 2 and heat exchange ventilation is performed.

  Further, when the heat exchange type ventilator is used in a low temperature region, when the supply air temperature is low and the heat exchanger 5 is in an icing state, the sensor means 24 detects it and the damper motor 23 supplies the exhaust damper 16 to the supply air. The air damper 17 and the circulation damper 19 are driven, the exhaust opening 12 is closed by the exhaust damper 16, the air supply opening 14 is closed by the air supply damper 17, and the circulation damper 19 opens the circulation opening 18, as shown in FIG. By setting the state, when the exhaust fan 6 is operated, the indoor air holding heat is sucked into the ventilation unit 8 from the indoor exhaust port 1, and the exhaust heat air is one side of the heat exchanger 5. The ice in the heat exchanger 5 is melted by the heat contained in the exhaust heat air.

  Then, the exhaust air that has passed through the heat exchanger 5 and has been heated but the heat still remains is recirculated through the air supply passage 10 through the open circulation opening 18 and the passage on the other side of the heat exchanger 5 again. Then, the heat exchanger 5 is heated to further melt the ice.

  Next, the operational relationship among the temperature sensor 25, the damper motor 23, and each damper will be described.

  In the state of FIG. 4, the exhaust damper 16 and the supply damper 17 are opened, the circulation damper 19 is closing the circulation opening, the first limit switch 26a is opened, and the damper motor 23 is stopped. The temperature sensor 25 is in contact with the supply airflow of the supply airflow path 10.

  In this state, the operation of the heat exchange ventilator is continued, and when the temperature sensor 25 senses the low temperature of the supply air flow and the heat exchanger 5 approaches the icing state, the contact (A) of the temperature sensor 25 ( B), the damper motor 23 that is stopped via the second limit switch 26b is energized, the damper motor 23 is operated, and the exhaust damper 16 and the supply damper 17 close the exhaust opening 12 and the supply opening 14. Then, the circulation damper 19 is opened and the circulation opening 18 is opened.

  In this state, the first limit switch 26a is closed, the second limit switch 26b is opened, and energization to the damper motor 23 is stopped.

  The exhaust air exhausted from the indoor exhaust port 1 passes through the heat exchanger 5, then passes through the circulation opening 18, enters the supply air channel 10, and passes through the heat exchanger 5 again from the supply air channel 10. When the circulation flow path 29 that is supplied to the inner air supply port 2 is formed and the icing of the heat exchanger 5 is melted, and the temperature detected by the temperature sensor 25 becomes equal to or higher than a predetermined temperature, The contact of the sensor 25 is switched from (B) to (A), and the damper motor 23 is energized via the first limit switch 26a. The damper motor 23 causes the exhaust damper 16 and the supply damper 17 to circulate in an open state. The damper 19 is closed and normal heat exchange ventilation operation is performed. The electric circuit at that time is in the state shown in FIG. 4, the temperature sensor 25 is connected to the contact (A), and the first limit switch 26 is connected. The energization of the damper motor 23 in an open state is stopped.

  As described above, in the first embodiment of the present invention, the heat exchanger 5 that performs heat exchange between the indoor exhaust flow and the supply airflow from the outside, the exhaust blower 6 that forms the exhaust flow, and the supply air that forms the supply airflow. Exhaust damper receiver 13 provided in the exhaust flow path 9 having a ventilation unit 8 provided with a blower 7, a partition plate 11 that partitions the exhaust flow path 9 and the air supply flow path 10, and an exhaust opening 12 through which the exhaust flow passes. And an air supply damper 15 provided in the air supply passage 10, an exhaust damper 16 for opening and closing the exhaust opening 12, and an air supply damper 17 for opening and closing the air supply opening 14. A circulation opening 18 that opens in the partition plate 11 so as to communicate the exhaust passage 9 and the air supply passage 10, a circulation damper 19 that opens and closes the circulation opening 18, a damper motor 23 that opens and closes each damper, and an air temperature. Sensor means 2 for detecting And the sensor means 24 is provided in the vicinity of the circulation opening 18 in the air supply flow path 10 of the flow path switching unit 22, so that air from the low temperature outdoor and high temperature indoor air are provided. Since the two types of airflows directly contact the sensor means 24, the sensor means 24 detects the temperature of the supply airflow and the temperature of the circulation flow, and switches between introduction of outdoor air and circulation of the indoor air by opening and closing each damper. This eliminates the need for a timer or the like for switching between the introduction of outdoor air and the circulation of room air, thereby reducing costs and simplifying the electrical circuit.

  Further, since the sensor means 24 is formed by one temperature sensor 25, originally two temperature sensors are necessary to sense the temperature of two kinds of air currents, whereas one temperature sensor. 25, two types of airflow temperatures can be sensed, and the circuit can be simplified at low cost.

  Further, since the sensor means 24 is formed by the temperature sensor 25 of the C contact, the contact can be switched according to the temperature of the abutting air current, and the current to the damper motor 23 is energized in both cases of opening and closing each damper. Therefore, it is possible to open and close the damper using the driving force of the damper motor 23, and it is possible to open and close more reliably without losing wind pressure than when using a spring or the like, and the sound of the damper when it opens and closes. Generation | occurrence | production can be prevented and a damper can be opened and closed by one temperature sensor 25, Therefore A cost reduction and simplification of an electric circuit can be aimed at.

(Embodiment 2)
As shown in FIG. 5, the sensor means 24 </ b> A is surrounded by a heat insulating material 30.

  In the above configuration, the sensor means 24A for detecting the temperature of the airflow can freely adjust the sensitivity of the sensor means 24A by utilizing the fact that the reaction time varies depending on the type and thickness of the heat insulating material 30 surrounding the surroundings. The damper opening / closing time can be freely adjusted, and the single sensor means 24A can cope with it, so that a timer or the like is not required and the cost can be reduced and the electric circuit can be simplified.

(Embodiment 3)
As shown in FIG. 6, an enclosure 31 is provided so that the air supply air does not directly contact the temperature sensor 25B.

  In the above configuration, when the airflow is in direct contact with the temperature sensor 25B, the time until detection of the predetermined temperature is shortened, and when the airflow is not in direct contact with the temperature sensor 25B, the time is increased. By changing the degree of contact of the airflow corresponding to 25B, the open / close time of the exhaust damper 16A, the supply damper 17A, and the circulation damper 19A can be freely adjusted, and a timer or the like becomes unnecessary, thereby reducing costs and electric circuit. Can be simplified.

(Embodiment 4)
As shown in FIG. 7, an enclosure 31A is provided so that the circulating flow passing through the circulation opening 18A does not directly contact the temperature sensor 25C.

  In the above configuration, the reaction time of the temperature sensor 25C is shortened when the circulating airflow is directly applied, and is increased when the circulating airflow is not applied directly, so that the shape of the enclosure 31A is changed to correspond to the temperature sensor 25C. By changing the degree of contact of the airflow, the opening / closing time of the exhaust damper 16B, the supply damper 17B, and the circulation damper 19B can be freely adjusted, and the amount of air flowing in from the circulation opening 18A is divided into two. The enclosure 31A may be formed to reduce the air flow corresponding to the temperature sensor 25C, and the degree of detection of the temperature sensor 25C may be variable, so that a timer or the like is not required, and costs can be reduced and electric circuits can be simplified. It becomes.

(Embodiment 5)
As shown in FIGS. 8 and 9, a part of the circulation damper 19C is formed and configured to serve as an enclosure 31B of the temperature sensor 25D.

  In the above configuration, in a state where the circulation damper 19C closes the circulation opening 18B, the enclosure 31B formed in a part of the circulation damper 19C serves as an enclosure for the temperature sensor 25D, and blocks the direct supply airflow to the temperature sensor 25D. Since the reaction time of the temperature sensor 25D becomes longer, the opening / closing time of each damper can be freely adjusted, a timer or the like is not required, and the cost can be reduced and the electric circuit can be simplified.

  Further, in the state where the circulation damper 19C opens the circulation opening 18B, the enclosure 31B formed in the circulation damper 19C is located outside the circulation flow path 29.

(Embodiment 6)
As shown in FIGS. 10 and 11, a temperature sensor 25E is provided in the circulation damper 19D.

  In the above configuration, the temperature sensor 25E can be adjusted to be provided in a place where the airflow is directly applied or not, and since the reaction time of the temperature sensor 25E can be adjusted, the opening / closing time of each damper can be freely adjusted. In addition, a timer or the like is not necessary, and costs can be reduced and an electric circuit can be simplified.

(Embodiment 7)
As shown in FIG. 12, the temperature sensor 25F is configured with waterproofing measures.

  In the above configuration, water can be prevented from entering the temperature sensor 25F, and even if condensed water is generated in the flow path switching unit 22A, it is possible to prevent water from entering the temperature sensor 25F. Will be enhanced.

  An air cleaning means for removing dust is provided in the circulation flow path for circulating indoor air, and a circulation opening for communicating with the circulation flow path is provided in the air supply flow path for supplying fresh outdoor air. It is also possible to apply the present invention to an air purifier that can provide a single contamination degree detection sensor in the vicinity of the circulation opening of the air supply passage so that the supply of outside air and the cleaning of indoor air can be performed alternately.

Schematic sectional view showing a normal state of the heat exchange type ventilator of Embodiment 1 of the present invention Schematic sectional view showing the state of melting of ice in the heat exchange type ventilator The perspective view of the flow-path switching unit except the damper of the heat exchange type ventilator Circuit diagram showing the relationship between the temperature sensor and damper motor of the heat exchange ventilator The perspective view of the sensor means of the heat exchange type ventilation apparatus of Embodiment 2 of this invention Schematic sectional view showing a normal state of the heat exchange ventilator according to Embodiment 3 of the present invention Schematic sectional view showing a state of melting of ice in the heat exchange type ventilator according to Embodiment 4 of the present invention. Schematic sectional view showing the normal state of the heat exchange type ventilator of Embodiment 5 of the present invention Schematic sectional view showing the state of melting of ice in the heat exchange type ventilator Schematic sectional view showing a normal state of the heat exchange type ventilator of Embodiment 6 of the present invention Schematic sectional view showing the state of melting of ice in the heat exchange type ventilator Schematic sectional view showing the normal state of the heat exchange type ventilator of Embodiment 7 of the present invention Configuration diagram of damper part of anti-freezing device of conventional ventilator

Explanation of symbols

DESCRIPTION OF SYMBOLS 5 Heat exchanger 6 Exhaust blower 7 Supply air blower 8 Ventilation unit 9 Exhaust flow path 10 Supply air flow path 11 Partition plate 12 Exhaust opening 13 Exhaust damper receiver 14 Supply air opening 15 Supply air damper receiver 16 Exhaust damper 17 Supply air damper 18 circulation opening 18A circulation opening 19 circulation damper 19C circulation damper 19D circulation damper 22 flow path switching unit 23 damper motor 24 sensor means 24A sensor means 25 temperature sensor 25B temperature sensor 25C temperature sensor 25D temperature sensor 25E temperature sensor 25F temperature sensor 30 heat insulating material 31 enclosure 31A enclosure 31B enclosure

Claims (9)

A ventilation unit provided with an indoor exhaust flow, a heat exchanger that performs heat exchange of an air supply air flow from outside, an exhaust fan that forms the exhaust flow, and an air supply fan that forms the air supply flow; A partition plate that divides the exhaust flow path and the supply air flow path; an exhaust opening through which the exhaust flow passes; an exhaust damper receiver provided in the exhaust flow path; an air supply opening through which the supply air flow passes; An air supply damper receiver provided on the road, an exhaust damper that opens and closes the exhaust opening, an air supply damper that opens and closes the air supply opening, and the partition plate so as to communicate the exhaust passage and the supply passage. A flow path switching unit provided with an open circulation opening, a circulation damper that opens and closes the circulation opening, a damper motor that opens and closes each of the dampers, and a sensor means that detects air temperature and controls the opening and closing of each of the dampers; Comprising Heat exchange type ventilator of the Nsa means provided at a position where the circulation flow through the supply air flow and the circulation opening of the flow path switching unit together contacts. 2. The heat exchange type ventilator according to claim 1, wherein the sensor means is formed by a single temperature sensor. 3. The heat exchange type ventilator according to claim 2, wherein the sensor means is a C-contact temperature sensor. The heat exchange type ventilator according to any one of claims 1 to 3, wherein the sensor means is surrounded by a heat insulating material. The heat exchange type ventilator according to any one of claims 1 to 3, wherein an enclosure is provided so that the air supply air does not directly contact the sensor means. The heat exchange type ventilator according to any one of claims 1 to 3, wherein an enclosure is provided so that the circulating flow through the circulation opening does not directly contact the sensor means. The heat exchange type ventilator according to any one of claims 1 to 3, wherein a part of the circulation damper is formed to serve as an enclosure for the sensor means. The heat exchange type ventilator according to any one of claims 1 to 3, wherein a sensor means is provided in the circulation damper. The heat exchange ventilator according to any one of claims 1 to 3, wherein the sensor means is waterproofed.

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