JP4354415B2 - Heat exchange ventilator - Google Patents

Description

  The present invention relates to a heat exchange ventilator that exchanges heat between a supply air flow and an exhaust flow.

  In some heat exchange ventilators, an exhaust flow that is a flow of room air is passed through a bypass that bypasses the heat exchanger so that ventilation by supply and exhaust without heat exchange can be performed. The bypass is opened and closed by an electric damper. In mid-season such as spring or autumn, normal ventilation using bypass can be performed. In addition, there exists a thing shown by patent document 1 as this type of prior art.

JP-A-5-256485

  The conventional heat exchange ventilator is either a heat exchange ventilation mode that ventilates the room by continuously exchanging heat between the supply and exhaust flow according to the setting of the ventilation mode setting unit, or opens a bypass with an electric damper and heat exchanges the exhaust flow It is possible to set one of the normal ventilation modes by supply / exhaust that does not exchange heat between the supply / exhaust flows, bypassing the vessel. An outside air temperature detection sensor that detects the outside air temperature is provided, and when the outside air temperature is lower than the predetermined temperature, the electric damper is forcibly operated to close the bypass even when operating in the normal ventilation mode. To do. However, today, as the airtightness of houses is advanced and a ventilation system that constantly ventilates the whole house is proposed, it is not functional as a ventilator that forms the core of such a ventilation system.

  Such a ventilation system is often configured to supply air from a living room or the like and exhaust air from a sanitary zone. Even in the sanitary zone, the bathroom is not suitable for ventilation at all times, unlike the toilet and washroom. When bathing, the coldness is felt by exhaust ventilation, or if the bathroom warm air is heat exchange ventilated through a heat exchanger in the summer, the cooling load increases, which is not suitable as a ventilation system.

  The present invention has been made to solve the above-described problems, and an object of the present invention is to obtain a heat exchange ventilator that can construct a ventilation system suitable for continuous ventilation of the entire house. It is to improve the functions of the device.

In order to solve the above problems, the present invention defines an exhaust passage for taking in indoor air and exhausting it outside the room, and an air supply passage for taking in outdoor air and supplying it into the room. A part of the air supply passage is constituted by a secondary passage of the built-in heat exchanger, a part of the exhaust passage is constituted by a primary passage of the heat exchanger, and the air supply passage is provided with a secondary of the heat exchanger. A heat exchange ventilator provided with an air supply blower that forms a supply airflow passing through the passage and an exhaust air blower that forms an exhaust flow passing through the primary passage of the heat exchanger is provided in the exhaust passage. A plurality of suction ports are provided, and a specific one of them is connected to a bypass passage that bypasses the primary passage of the heat exchanger, and the bypass passage is closed by a single electric damper provided in the connecting portion. The interior air inlet leading to the primary passage and the exhaust passage A heat exchange ventilation mode to release to open the bypass passage, and ordinary ventilation mode which closes the exhaust passage portion communicating with the primary passageway of the heat exchanger, the bypass passage is closed, and an exhaust passage leading to a primary passage of the heat exchanger Adopting a means that allows the user to alternatively select the ventilation stop mode in which the part is also closed.

  According to the present invention, a specific thing connected to the bypass passage of the indoor suction port is communicated to the bathroom, etc., and the other indoor suction port is communicated to a toilet or a washroom other than the bathroom so that air supply is performed in the room. A ventilation system can be constructed. With this ventilation system, ventilation by exhaust can be stopped for bathrooms, etc., and coldness is felt by exhaust ventilation when taking a bath, or warm air in the bathroom etc. is exhausted without passing through a heat exchanger by a bypass passage in summer. Therefore, it is suitable as a ventilation system that constantly ventilates the entire house.

  The heat exchange ventilator of the present invention is installed in a ceiling space or the like and communicates with the inside and outside of the room by a duct. An exhaust passage for taking in indoor air and exhausting it out of the room, and taking in outdoor air into the room. An air supply passage for supplying air is defined in the main body box. A part of the air supply passage is constituted by a secondary passage of a built-in heat exchanger. A part of the exhaust passage is constituted by a primary passage of the heat exchanger. The air supply passage is provided with an air supply blower that forms a supply airflow passing through the secondary passage of the heat exchanger. The exhaust passage is provided with an exhaust fan for forming an exhaust flow passing through the primary passage of the heat exchanger.

  The air supply passage is a series of air passages having an outdoor suction port as an inlet end and an indoor outlet as an outlet end. The outdoor suction port is outdoors via a duct, and the indoor outlet is indoors via a duct. Will be contacted respectively. The exhaust passage is a series of air passages with the indoor suction port as the inlet end and the outdoor outlet as the outlet end. The indoor suction port is connected to the room via a duct, and the outdoor outlet is connected via the duct. Be contacted outdoors. There are two indoor intake ports in the exhaust passage, and one of them is connected to a bypass passage that bypasses the primary passage of the heat exchanger. An electric damper is provided in the communication part. By the operation of the electric damper, the bypass passage can be closed, and the exhaust passage portion connected to the indoor suction port leading to the primary passage of the heat exchanger can be opened. In addition, by the operation of the electric damper, the bypass passage can be opened and the exhaust passage portion leading to the primary passage of the heat exchanger can be closed, and further, the exhaust passage portion closing the bypass passage and leading to the primary passage of the heat exchanger Can also be closed.

  This heat exchange ventilator is installed in the ceiling space of a house, etc., and the indoor suction port and the indoor air outlet are each connected to the room by a duct, and the outdoor air inlet and the outdoor air outlet are connected to the outside to connect the entire house. A ventilation system that provides constant ventilation can be constructed. The one that leads to the bypass passages of the two indoor suction ports is connected to the bathroom, and the other suction ports are connected to the toilet and the washroom through a branched duct. The indoor outlet is connected to the living room. When the air supply fan and the exhaust fan are operated, outside air is supplied from the living room, and the air in the house is exhausted from the toilet, the washroom, and the bathroom to the outside. The supply air flow and the exhaust flow are continuously heat-exchanged in the heat exchanger, and heat exchange ventilation with little variation in the state quantity can be performed. At this time, the toilet and the washroom are always exhausted through the heat exchanger, but in the bathroom, the electric damper is operated, the exhaust passage leading to the heat exchanger is closed, and the bypass passage is opened to exchange heat. It is possible to exhaust without passing through the vessel. In addition, the operation of the electric damper closes the bypass passage and also closes the exhaust passage portion leading to the primary passage of the heat exchanger, thereby stopping the ventilation of the bathroom itself. As a result, ventilation by the exhaust can be stopped for the bathroom, and it does not feel cold due to ventilation at the time of bathing in the winter, etc. This makes it possible to construct a ventilation system that can exhaust air and constantly ventilate the entire house with less wasteful energy consumption.

Embodiment 1 FIG.
The present embodiment shown in FIG. 1 to FIG. 8 relates to a heat exchange ventilator that is installed in a ceiling space or the like and ventilates the entire house. 1 and 2 are conceptual diagrams showing the configuration of the heat exchange ventilator in plan view, FIGS. 3, 4, and 5 are side configuration diagrams showing the housing part for each function, and FIG. 6 is an electric system. FIG. 7 is a flowchart showing the operation of the control unit, and FIG. 8 is a cross-sectional configuration diagram showing a residence to which the heat exchange ventilator is applied. The heat exchanging ventilator 1 of the present embodiment is installed in a ceiling space as shown in FIG. 8 and communicates with the outside of the room through a duct 2 for taking in indoor air and exhausting it outside the room. An exhaust passage 3 and an air supply passage 4 for taking in outdoor air and supplying it into the room are defined in the main body box 5. A part of the supply passage 4 is constituted by a secondary passage 7 of a heat exchanger 6 provided in the center of the main body box 5. Further, a part of the exhaust passage 3 is constituted by a primary passage 8 of the same heat exchanger 6 (see FIG. 2). The air supply passage 4 is provided with an air supply blower 9 that forms an air supply air passing through the secondary passage 7 of the heat exchanger 6. The drive motor 10 of the air supply blower 9 is an AC motor. The exhaust passage 3 is provided with an exhaust fan 11 that forms an exhaust flow passing through the primary passage 8 of the heat exchanger 6. The drive motor 12 of the exhaust fan 11 is a DC brushless motor.

  The air supply passage 4 is a series of air passages having an outdoor suction port 13 opened in a side surface of the main body box 5 as an inlet end and an indoor outlet 14 as an outlet end. The outdoor suction port 13 is connected to the duct 2. The indoor outlet 14 is communicated with the room via the duct 2. The exhaust passage 3 is a series of air passages having the indoor suction ports 15 to 17 as inlet ends and the outdoor outlet 18 as an outlet end. The indoor suction ports 15 to 17 are provided on the suction side of the exhaust fan 11. The outdoor air outlet 18 is in communication with the outside via the duct 2. A plurality of indoor suction ports 15 to 17 of the exhaust passage 3 are provided on the side surface of the main body box 5, and a specific indoor suction port 17 of the exhaust passage 3 has a bypass passage 19 that bypasses the primary passage 8 of the heat exchanger 6. You are in contact (see Figure 3). The connecting portion is provided with an electric damper 20 having an angle-shaped rotating blade.

  By the rotating operation of the electric damper 20, the bypass passage 19 can be closed, and the exhaust passage portion 21 continuing to the indoor suction port 17 leading to the primary passage 8 of the heat exchanger 6 can be opened (see FIG. 3). In addition, the bypass passage 19 can be opened by rotating the electric damper 20, and the exhaust passage portion 21 leading to the primary passage 8 of the heat exchanger 6 can be closed as shown in FIG. As shown, the bypass passage 19 can be closed and the exhaust passage portion 21 leading to the primary passage 8 of the heat exchanger 6 can also be closed. The bypass passage 19, the connecting portion thereof, and the electric damper 20 are collectively configured in a housing 22 provided on the upstream side of the heat exchanger 6 in the exhaust passage 3. With this configuration, by providing a plurality of specific indoor suction ports 17 and connecting them to the housing 22, the above three functions can be performed for each indoor suction port 17. When a plurality of specific indoor suction ports 17 are not necessary, the unnecessary indoor suction ports 17 may be closed with a closing lid.

  The electric damper 20 and the exhaust fan 11 are controlled by a control unit 23 provided in the main body box 5. As shown in FIG. 6, the control unit 23 includes a determination unit 24 that determines the operation mode of the electric damper 20, a damper drive unit 25, a drive unit 26 that drives the drive motor 12 of the exhaust fan 11, and the heat exchanger 6. The primary passage 8 and a determination unit 28 for determining the maintenance time of the air filter 27 provided at the entrance of the secondary passage 7 are connected to selection means 29 attached to the wall of the house. The selection means 29 is provided with three mode setting switches 30 to 32 for instructing the rotational position of the electric damper 20. A variable resistor 34 is provided in series with one end of the mode setting switches 30 to 32 and the operation switch 33, and is connected to the drive unit 26 of the control unit 23. The three mode setting switches 30 to 32 are for selecting a heat exchange ventilation mode, a normal ventilation mode, and a ventilation stop mode, and are configured such that when any one is turned on, the other two are turned off. . For example, when the heat exchange ventilation mode is selected by the mode setting switch 30, the determination unit 24 of the control unit 23 determines the selected operation mode, and drives the pulse motor of the electric damper 20 via the damper drive unit 25. The bypass passage 19 is closed, and the exhaust passage portion 21 leading to the primary passage 8 of the heat exchanger 6 is opened. The drive unit 26 that drives the drive motor 12 of the exhaust blower 11 is composed of an inverter that drives the drive motor 12 at a variable speed, and the drive motor 12 is controlled at a variable speed by a variable resistor 34 that functions as a speed command generation means of the selection means 29. Control.

  The determination unit 28 that determines the maintenance time of the air filter 27 includes a display unit 35 that is connected to a power source by connecting a switch incorporating a light emitting element and the heat exchange ventilator 1 in series. The control unit 23 is provided with a detection circuit that detects the operation of the switch and a control circuit that controls lighting / extinguishing of the light emitting element, and is configured so that the light emitting element of the switch does not light up when the detection circuit is energized. . On / off of the light emitting element of the switch is controlled through a control circuit that receives a detection output of the detection circuit and notifies a preset notification content.

  The heat exchange ventilator 1 operates as shown in the flowchart of FIG. That is, when the power is turned on (step # 1), the operation of the air supply blower 9 and the exhaust blower 11 is started in step # 2, and the process proceeds to step # 3. In step # 3, it is determined which of the mode setting switches 30 to 32 is set. In the heat exchange ventilation mode, the electric damper 20 is moved in step # 4, and in the normal ventilation mode, in step # 5. The electric damper 20 is moved in such a manner, and if it is in the ventilation stop mode, the electric damper 20 is moved in that way in step # 6 and the process proceeds to step # 7. In step # 7, the operating time of the air supply fan 9 is integrated, and in step # 8, it is determined whether or not the integrated time T has exceeded a predetermined reference time T0. If not, the process returns to step # 2, and if it exceeds, the light emitting element of the switch is turned on in step # 9 to notify the display unit 35 that the maintenance time for the air filter 27 is reached, and the process is terminated.

  This heat exchanging ventilator 1 is installed in a ceiling space of a house, etc., and indoor air inlets 15 to 17 and an indoor air outlet 14 are respectively connected to the room by a duct 2, and the outdoor air inlet 13 and the outdoor air outlet 18 are connected outdoors. A ventilation system that constantly ventilates the entire house can be constructed by contacting What leads to the bypass passage 19 of the indoor suction port 17 is connected to the bathroom L1, and the other indoor suction ports 15 and 16 are connected to the toilet L2 and the washroom L3 by the duct 2. The indoor outlet 14 is connected to the living room L4. When the air supply fan 9 and the exhaust fan 11 are operated, outside air is supplied from the living room L4, and the air in the house is exhausted to the outside from the toilet L2, the washroom L3, and the bathroom L1 through a louver or the like. The supply air flow and the exhaust air flow are continuously heat-exchanged in the heat exchanger 6, and heat exchange ventilation with little variation in the state quantity can be performed. At this time, the toilet L2 and the washroom L3 are always exhausted through the heat exchanger 6, but the bathroom L1 has the bypass passage 19 and the exhaust passage portion 21 that leads to the heat exchanger 6 by operating the electric damper 20. By closing and opening the bypass passage 19, it is possible to exhaust without passing through the heat exchanger 6. Further, by the operation of the electric damper 20, the bypass passage 19 is closed, the exhaust passage portion 21 leading to the primary passage 8 of the heat exchanger 6 is also closed, and the ventilation itself of the bathroom L1 can be stopped. As a result, the ventilation by the exhaust can be stopped for the bathroom L1, and the warm air in the bathroom L1 is transferred to the heat exchanger 6 by the bypass passage 19 in the summer without having to remember the cold during the bathing in the winter. It is possible to construct a ventilation system that exhausts air without passing through it, and constantly ventilates the entire house with less wasteful energy consumption. In the ventilation stop mode, the total exhaust air volume can be secured by variable speed control of the exhaust fan 11 by the speed command generating means.

It is the conceptual diagram which showed the structure of the heat exchange ventilation apparatus planarly. (Embodiment 1) It is the conceptual diagram which showed the structure of the heat exchange ventilation apparatus planarly. (Embodiment 1) It is the side block diagram which showed the housing part for every function. (Embodiment 1) It is the side block diagram which showed the housing part for every function. (Embodiment 1) It is the side block diagram which showed the housing part for every function. (Embodiment 1) It is a block diagram of an electric system. (Embodiment 1) It is a flowchart which shows operation | movement of a control part. (Embodiment 1) It is a section lineblock diagram showing a residence to which a heat exchange ventilator is applied. (Embodiment 1)

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 Heat exchange ventilator, 3 Exhaust passage, 4 Supply passage, 6 Heat exchanger, 7 Secondary passage, 8 Primary passage, 9 Supply blower, 11 Exhaust blower, 13 Outdoor inlet, 14 Indoor outlet, 15, 16, 17 Indoor suction port, 18 Outdoor blowout port, 19 Bypass passage, 20 Electric damper, 21 Exhaust passage portion, 22 Housing.

Claims (3)

An exhaust passage for taking in indoor air and exhausting it to the outside of the room and an air supply passage for taking in outdoor air and supplying it into the room are defined in the main body box, and a part of the air supply passage is built in. The exhaust passage is partially formed of a primary passage of the heat exchanger, and the supply air passage is supplied with an air flow passing through the secondary passage of the heat exchanger. A heat exchange ventilator provided with an air blower for forming, and an exhaust fan for forming an exhaust flow passing through a primary passage of the heat exchanger in the exhaust passage, wherein the air intake vent of the exhaust passage A plurality of them, a specific one of which is connected to a bypass passage that bypasses the primary passage of the heat exchanger, and the bypass passage is closed by a single electric damper provided in the connecting portion, and the heat exchange The indoor air inlet opening that leads to the primary passage A heat exchange ventilation mode to open the minute, opening the pre-Symbol bypass passage, and ordinary ventilation mode to close the exhaust passage portion communicating with the primary passageway of the heat exchanger, closes the previous SL bypass passage, and the heat A heat exchange ventilator characterized in that it can selectively select a ventilation stop mode in which the exhaust passage portion leading to the primary passage of the exchanger is also closed. A heat exchange ventilator according to claim 1, wherein the bypass passage of the chamber inlet port, by being configured in a housing provided with the contact portion and the electric damper upstream of the heat exchanger of the exhaust passage Heat exchange ventilator. A heat exchange ventilator according to claim 1 or claim 2, the heat exchange ventilator being characterized in that to allow variable speed controlled by the speed command generating means of the exhaust blower.

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