JP2009250595A - Heat exchange type ventilating device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a heat exchange type ventilating device capable of avoiding effects by freezing inside a heat exchanger and continuing primary heat exchange ventilation even when operated in winter in a cold area. <P>SOLUTION: When freezing occurs in first and second heat exchange discharge flow passages 21a, 21b, the heat exchange type ventilating device 1 sequentially switches first and second heat exchange ventilating operations during freezing and first and second defrosting operations by using first and second heat exchangers 3a, 3b. When freezing does not occur in the first and second heat exchange discharge flow passages 21a, 21b, the heat exchange type ventilating device 1 performs a heat exchange ventilating operation at normal time by using the first and second heat exchangers 3a, 3b. Due to this configuration, primary heat exchange ventilation can be continuously performed. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a heat exchange type ventilator that is used in a cold district or the like and performs heat exchange between an exhaust flow for exhausting indoor air to the outside and an air supply air for supplying outdoor air to the room.

  This type of heat exchange type ventilator is adjacent in the flow path in the heat exchanger in which the warm exhaust flow from the room flows when the outdoor temperature becomes low, for example, −10 ° C. or lower in winter. Ice cooling and clogging occur under the influence of the cold air supplied from outside to the air supply flow path, but conventional heat exchange ventilators have been configured to prevent clogging due to freezing. (For example, refer to Patent Document 1).

  Moreover, in an area where the outdoor temperature is extremely low such as −25 ° C., there is actually no heat exchange type ventilator for practical use.

  Hereinafter, the heat exchange type ventilation apparatus shown in Patent Document 1 will be described with reference to FIG.

  As shown in FIG. 12, the heat exchanger unit 101 performs heat exchange ventilation between indoor air and outdoor air, and the heat exchanger unit 101 exhausts the heat exchanger 102 and indoor air to the outside. The exhaust path 103 passing through the heat exchanger 102, the outdoor air is supplied into the room, the supply path 104 passing through the heat exchanger 102, the exhaust fan 105 incorporated in the exhaust path 103, and the supply path An air supply fan 106 incorporated in the air conditioner 104, a temperature sensor 107 that detects the outside air temperature of the outdoor air, and a control unit that controls the operation of the exhaust fan 105 and the air supply fan 106 according to the outside air temperature detected by the temperature sensor 107 are provided. ing.

  And the control part of the heat exchanger unit 101 performs two freezing suppression controls according to outside air temperature, in order to suppress that the heat exchanger 102 freezes, when outside temperature falls below -10 degreeC, and this 2 The two freeze suppression controls are the first freeze suppression control and the second freeze suppression control.

  The first freezing suppression control is a control for suppressing freezing of the heat exchanger 102 when the outside air temperature falls below −10 ° C., and the exhaust fan 105 is always operated and the operation of the air supply fan 106 is performed for 60 minutes. Repeat the operation to pause for the first 15 minutes.

The second freezing suppression control is a control for suppressing freezing of the heat exchanger 102 more strongly than the first freezing suppression control when the outside air temperature falls below −15 ° C., and the exhaust fan 105 and the supply fan 106 are controlled. Perform intermittent operation. In the second freezing suppression control, the exhaust fan 105 and the air supply fan 106 are paused for 60 minutes and then restarted for 5 minutes.
Japanese Patent No. 3744409

  In such a conventional heat exchanger unit 101, in the first freezing suppression control when the outside air temperature falls below −10 ° C., the exhaust fan 105 is always operated and the supply fan 106 is 45 minutes out of 60 minutes. Because the air supply fan 106 is not running for 15 minutes, the room is under negative pressure and the outdoor air flows in through the gaps in the building, which may cause cold drafts and condensation. It was.

  Further, in the conventional heat exchanger unit 101, the second freezing suppression control when the outside air temperature falls below −15 ° C., the exhaust fan 105 and the air supply fan 106 operate for 5 minutes out of 65 minutes. The operation of the exhaust fan 105 and the air supply fan 106 for 5 minutes is mainly the monitoring of the outside air temperature by the temperature sensor 107, and since the operation of the heat exchange ventilation is stopped for most of the time, it is necessary for houses and buildings. Could not be obtained while recovering heat.

  The present invention solves such a problem, and avoids the influence of freezing inside the heat exchanger even when it is operated in a cold region where the outdoor temperature is extremely low. Further, the present invention aims to provide a heat exchange type ventilation device that can realize a comfortable living space free from cold drafts and condensation.

  In order to achieve this object, the present invention allows an exhaust flow for exhausting indoor air to the outside of the room and a supply air flow for supplying the outdoor air to the interior of the room to ventilate between the exhaust flow and the supply air flow. A heat exchange type ventilator comprising a heat exchanger for exchanging heat with the heat exchanger, the heat exchanger comprising a plurality of the heat exchangers, wherein the heat exchanger ventilates the exhaust flow and the supply air flow, and a heat exchange exhaust passage and heat exchange An air flow path, and when condensation or icing occurs in the heat exchange exhaust flow path, one heat exchanger performs a heat exchange air operation during icing, and one of the other heat exchangers is the heat exchange exhaust. A defrost operation that eliminates condensation and icing in the flow path is performed, and the heat exchange air operation and the defrost operation at the time of icing are sequentially switched by a plurality of the heat exchangers. If freezing does not occur, use multiple heat exchangers A heat exchanger type ventilation system that can perform heat exchange ventilation is performed when, thereby, is to achieve the intended purpose.

  According to the present invention, even if the outdoor is operated in a cold region where the temperature is extremely low, the effect of freezing inside the heat exchanger can be avoided and the original heat exchange ventilation can be continued. In addition, it is possible to provide a heat exchange type ventilator that can realize a comfortable living space free from cold drafts and condensation.

  According to a first aspect of the present invention, there is provided a heat exchange type ventilator that ventilates an air flow for exhausting indoor air to the outside and a supply air flow for supplying the outdoor air to the room, thereby passing the exhaust flow and the supply air flow. A heat exchange ventilator comprising a heat exchanger for exchanging heat with the heat exchanger, the heat exchanger comprising a plurality of the heat exchangers, wherein the heat exchanger ventilates the exhaust flow and the supply air flow, A heat exchange air flow path, and when condensation or icing occurs in the heat exchange exhaust flow path, one heat exchanger performs heat exchange air operation during freezing, and any of the other heat exchangers The heat exchange exhaust flow path is configured to perform defrost operation to eliminate condensation or icing in the heat exchange exhaust flow path, and sequentially switch between the heat exchange air operation and the defrost operation at the time of freezing with the plurality of heat exchangers. When condensation or icing does not occur in It is configured to perform heat exchange air operation at all times, and when operating in a cold area where the outdoor temperature is extremely low, it is not affected by freezing in the heat exchange exhaust flow path, The heat exchange air operation can be continued, and when the outdoor temperature is high, a high heat exchange efficiency can be obtained by performing a normal heat exchange air operation using a plurality of heat exchangers. .

  The heat exchange ventilator according to claim 2 is the heat exchange ventilator according to claim 1, comprising a first main body box and a second main body box, wherein the first main body box is The first heat exchanger, the first blower, the first indoor exhaust port, the first outdoor exhaust port, the first outdoor air supply port, the first indoor air supply port, One reflux port, first exhaust flow shielding means, first supply airflow shielding means, and first reflux shielding means, wherein the first heat exchanger includes a first heat exchange exhaust flow path and A second heat exchanger, a second blower, a second indoor exhaust port, a second outdoor exhaust port, and a second heat exchanger. A second outdoor air supply port, a second indoor air supply port, a second reflux port, a second exhaust flow shielding means, a second supply air flow shielding means, and a second reflux shielding means. The second heat exchanger has a second heat An exhaust passage and a second heat exchange air supply passage are provided, and when condensation or icing occurs in the first and / or second heat exchange exhaust passage, the first heat exchanger performs heat exchange during icing. Air operation, the second heat exchanger performs a defrost operation, then the second heat exchanger performs a heat exchange air operation during freezing, the first heat exchanger performs a defrost operation, and so on. The first and second heat exchangers are configured to sequentially switch between heat exchange air operation and defrost operation during freezing, and when no condensation or freezing occurs in the heat exchange exhaust passage, the first and second heat exchangers The heat exchanger is configured to perform normal heat exchange air operation. When operating in a cold area where the outdoor temperature is extremely low, the effects of icing in the first and second heat exchange exhaust passages The heat exchange air operation at the time of freezing is continued. It can be, also, if the outdoor temperature is high, by a normal heat exchange ventilation is performed when using the first and second heat exchanger, it is possible to obtain high heat exchange efficiency.

  The heat exchange ventilator according to claim 3 is the heat exchange ventilator according to claim 2, wherein the first and second main body boxes are the first and / or second heat exchange exhaust passages. The first and / or second detection means for detecting the influence of dew condensation or icing in the heat exchanger, and when dew condensation or icing occurs in the first and / or second heat exchange exhaust flow path, heat exchange during icing Switching between the air operation and the defrost operation, and when dew condensation or icing does not occur in the first and second heat exchange exhaust passages, the operation control is performed to perform the normal heat exchange air operation. The first and / or second heat exchangers are frozen by the first and / or second detection means for detecting the influence of dew condensation or icing in the first and / or second heat exchange exhaust passages. Operation in cold areas where the outdoor temperature is extremely low Even if the temperature is high, the heat exchange air operation at the time of freezing can be continued, and if the outdoor temperature is high, the first and second heat exchangers can be used for normal heat exchange air. By operating, high heat exchange efficiency can be obtained.

  Further, the heat exchange type ventilator according to claim 4 is the heat exchange type ventilator according to claim 2, wherein the heat exchange air operation during freezing is performed by the first and second indoor air circulation flows in the defrost operation. The first and second reflux shielding means are shielded to perform heat exchange air operation during freezing, and the defrost operation is performed with the first and second exhaust flow paths of the heat exchange air operation during freezing. The first and second supply airflow paths are shielded by the first and second exhaust flow shielding means and the first and second supply airflow shielding means, and the defrost operation is performed. The indoor air circulation flow path of the defrost operation is shielded by the first and second reflux shielding means, and the normal heat exchange air operation is performed. The first and second reflux Shielding means; first and second exhaust flow shielding means; and first and second When operating in a cold area where the outdoor temperature is extremely low, the heat exchange air operation during icing and the defrost operation are switched simultaneously and sequentially for the first and second heat exchangers. Heat exchange air operation at the time of freezing can be continued, and when the outdoor temperature is high, the first and second heat exchangers are switched to normal heat exchange air operation. And high heat exchange efficiency can be obtained.

  In addition, the heat exchange ventilator according to claim 5 is configured to perform defrost operation using room air with respect to the heat exchange ventilator according to claim 4. The defrosting operation can reduce energy loss by returning the energy of room air to the room.

  In addition, the heat exchange ventilator according to claim 6 is the heat exchange ventilator according to claim 5, wherein the indoor air is exhausted from the first and second heat exchange exhausts in the first and second exhaust flows. In the case of the upstream side of the flow path, the first and second indoor air circulation flows pass the indoor air from the upstream side of the first and second heat exchange exhaust flow paths to the first and second heat exchangers. The first and second exhaust flow circulation paths are formed to pass through and return to the room from the downstream side of the first and second heat exchange exhaust flow paths, and the defrost operation is performed by the first and second exhaust flow circulation paths. In which dew condensation and icing in the first and / or second heat exchange exhaust flow paths are melted and dried by defrost operation using the first and second exhaust flow circulation paths. Thus, the heat exchange air operation during freezing can be continued for a long time without any trouble.

  The heat exchange ventilator according to claim 7 is the heat exchange ventilator according to claim 5, wherein the outdoor air is supplied to the first and second heat exchange airflows in the first and second supply airflows. In the case of the upstream side of the air flow path, the first and second indoor air circulation flows pass room air from the upstream side of the first and second heat exchange air flow paths to the first and second heat exchangers. The first and second air supply circulation paths are formed to pass through and return to the room from the downstream side of the first and second heat exchange air flow paths, and the defrost operation is performed in the first and second air supply circulation paths. The first and / or second heat exchange exhaust passages are used for the condensation and freezing of the first and second heat exchange air passages to pass through the first and second heat exchange air passages. This can be promoted by defrosting operation using the second air supply circulation path. In addition, since the first and second heat exchange air flow paths do not cause dew condensation or icing, the first and second indoor air circulation flows are easily ventilated in the first and second heat exchange air flow paths. It is possible to further accelerate the condensation and freezing and drying of the condensation in the first and / or second heat exchange exhaust passages.

  Further, the heat exchange type ventilator according to claim 8 is the heat exchange type ventilator according to claims 6 and 7, wherein the defrost operation is performed by the first and second exhaust flow circulation paths and the first and second exhaust gas circulation paths. Of the first and / or second heat exchange exhaust flow paths by the defrost operation using the first and second exhaust flow circulation paths. The condensation and icing are melted and dried, and the condensation and icing in the first and / or second heat exchange exhaust passages are further melted and dried. The first and second indoor air circulation can be promoted by defrost operation using the second air supply circulation path, and the first and second heat exchange air flow paths do not cause condensation or icing. Flow in the first and second heat exchange air flow paths It is easy to ventilate, and it is possible to further accelerate the condensation and freezing of the condensation and ice in the first and / or second heat exchange exhaust flow path, and the first and / or second heat exhaust flow. The effects of road condensation and icing can be recovered in a short time.

  The heat exchange ventilator according to claim 9 is the heat exchange ventilator according to claim 5, wherein the indoor air is exhausted from the first and second heat exchange exhausts in the first and second exhaust flows. When the upstream side of the flow path and the outdoor air in the first and second supply airflows are upstream of the first and second heat exchange airflow paths, the first and second indoor air circulation flows are: The room air is passed from the upstream side of the first and second heat exchange exhaust passages to the first and second heat exchangers, and then from the downstream side of the first and second heat exchange exhaust passages. It flows to the upstream side of the first and second heat exchange air flow paths, and further passes from the upstream side of the first and second heat exchange air flow paths to the first and second heat exchangers, First and second supply air flow circulation paths are formed to return from the downstream side of the first and second heat exchange air supply channels to the room, The lost operation is configured using the first and second supply air flow circulation paths, and the flow of condensation and freezing in the first and / or second heat exchange exhaust passages is one flow. This can be achieved by defrosting using the first and second feed air circulation routes.

  Further, the heat exchange ventilator according to claim 10 is the heat exchange ventilator according to claim 8, wherein the first and second reflux ports are the first and second exhaust ports in the first and second exhaust flow circulation paths. First and second exhaust gas recirculation ports, wherein the first and second exhaust gas recirculation ports are provided downstream of the first and second heat exchange exhaust flow paths, and the first and second recirculation shielding means are First and second exhaust gas recirculation shield dampers, wherein the first and second exhaust gas recirculation shield dampers shield the first and second exhaust air circulation paths of the first and second indoor air circulation flows and The first and second exhaust gas recirculation shield dampers are shielded and the first and second exhaust gas flows when opening and performing heat exchange air operation during freezing and normal heat exchange air operation. When performing defrost operation using the circulation path, And the second exhaust gas recirculation shielding damper is opened, and the first and second indoor air circulation flows are supplied from the downstream side of the first and second heat exchange exhaust flow paths to the first and second exhaust gas recirculation flows. It is configured to pass through the mouth and return to the room. By switching the damper, switching between heat exchange air operation during freezing, normal heat exchange air operation, and defrost operation, and by switching the damper, Forming first and second exhaust flow circulation paths for the first and second indoor air circulation flows, and defrosting using the first and second exhaust flow circulation paths, By melting and drying the condensation and freezing in the heat exchange exhaust flow path, the heat exchange air operation during freezing can be continued for a long time without any trouble.

  The heat exchange ventilator according to claim 11 is the heat exchange ventilator according to claim 8, in which the first and second return ports are the first and second recirculation openings in the first and second supply air circulation paths. First and second supply air recirculation ports, wherein the first and second supply air recirculation ports are provided on the upstream side of the first and second heat exchange air flow paths, and the first and second recirculation shielding means Are first and second supply air recirculation shield dampers, and the first and second supply air recirculation shield dampers are the first and second supply air circulations of the first and second indoor air circulation flows. The path is shielded and opened, and when the heat exchange air operation during freezing and the heat exchange air operation during normal operation are performed, the first and second supply air reflux shield dampers shield, and the first and second When performing defrost operation using the second air supply circulation path, And the second supply air recirculation shield damper is opened, and the first and second indoor air circulation flows pass through the first and second supply air recirculation ports and the first and second heat exchange flows. It is configured to flow to the upstream side of the air supply flow path. By switching the damper, the heat exchange air operation during icing, the normal heat exchange air operation, and the defrost operation are switched, and the damper is switched. Forming the first and second supply air circulation paths of the first and second indoor air circulation flows, and defrosting and freezing in the first and / or second heat exchange exhaust flow paths, This can be promoted by defrosting operation using the first and second supply air circulation paths that pass through the first and second heat exchange supply passages.

  Further, the heat exchange ventilator according to claim 12 is the heat exchange ventilator according to claim 9, wherein the first and second reflux ports in the first and second supply air flow circulation paths are 1st and 2nd supply air recirculation opening, provided between the downstream side of the 1st and 2nd heat exchange exhaust flow paths and the upstream side of the 1st and 2nd heat exchange supply air flow paths, And the second reflux shield means are first and second feed air reflux shield dampers, and the first and second feed air reflux shield dampers are the first and second indoor air circulation flows. When the first and second water supply air circulation circuits are shielded and opened, and the heat exchange air operation during freezing and the heat exchange air operation during normal operation are performed, the first and second water supply air supply operations are performed. Reflux shield damper is shielded, and defrost operation is performed using the first and second supply air flow circulation paths. The first and second air supply reflux shield dampers are opened, and the first and second indoor air circulation flows are downstream of the first and second heat exchange exhaust passages. Through the first and second feed air return openings and into the upstream side of the first and second heat exchange air flow passages, and by switching the damper, Switch between heat exchange air operation, normal heat exchange air operation, and defrost operation, and change the damper to change the first and second air supply / exhaust flow circulation paths of the first and second indoor air circulation flows. Forming, defrosting and freezing in the first and / or second heat-exhaust flow passages, and achieving defrost operation using the first and second supply air circulation paths of one flow it can.

  A heat exchange ventilator according to claim 13 is the heat exchange ventilator according to claim 10, wherein the first and second exhaust gas recirculation shield dampers are provided in the first and second exhaust gas circulation paths. Is configured to shield and open the first and second exhaust gas recirculation ports. The first and second exhaust gas recirculation ports are shielded and opened by the first and second exhaust gas recirculation shield dampers. By doing so, the first and second exhaust flow circulation paths can be easily shielded and opened, so that the heat exchange air operation during freezing, the heat exchange air operation during normal operation, and the defrost operation can be easily switched. it can.

  The heat exchange ventilator according to claim 14 is the heat exchange ventilator according to claim 11, wherein the first and second supply air recirculation shields are provided in the first and second supply air circulation paths. The damper is configured to shield and open the first and second supply air recirculation openings. The first and second supply air recirculation openings are formed by the first and second supply air recirculation shield dampers. By shielding and opening, the first and second air supply circulation paths can be easily shielded and opened, so heat exchange air operation during freezing, normal heat exchange air operation, and defrost operation are easy. Can be switched to.

  Moreover, the heat exchange type ventilator according to claim 15 is the heat exchange type ventilator according to claim 12, in which the first and second feed air flows in the first and second feed air flow circulation paths. The reflux shield damper is configured to shield and open the first and second supply / exhaust reflux ports. The first and second supply / exhaust reflux ports are connected to the first and second supply / exhaust reflux shield dampers. Since the first and second air supply / exhaust flow circulation paths can be easily shielded and opened by shielding and opening at, heat exchange air operation during freezing, normal heat exchange air operation, defrosting Operation can be switched easily.

  Further, the heat exchange ventilator according to claim 16 is the heat exchange ventilator according to claim 4, when performing the heat exchange air operation during freezing and the heat exchange air operation during normal time, The first and second exhaust flow shielding means open the first and second exhaust flow paths; the first and second supply air flow shielding means open the first and second supply air paths; When the defrost operation is performed, the first and second exhaust flow shields when the indoor air in the first and second exhaust flows is located upstream of the first and second heat exchange exhaust passages. The means shields at least a downstream side of the first and second heat exchange exhaust flow paths of the first and second exhaust flow paths, and removes outdoor air in the first and second supply airflows. When the upstream side of the first and second heat exchange air flow paths is provided, the first and second supply air flow shields are provided. The means is configured to shield at least the upstream side of the heat exchange air flow path of the first and second supply air flow paths, the first and second exhaust flow shielding means, When operating in a cold area where the outdoor temperature is extremely low by the second air supply shielding means, the heat exchange air operation and defrost operation at the time of freezing are performed simultaneously on the first and second heat exchangers, and The heat exchange air operation during the original freezing can be continued, and when the outdoor temperature is high, the heat exchange air in the normal state is supplied to the first and second heat exchangers. It can be switched to operation, and high heat exchange efficiency can be obtained. The first and second exhaust flow shielding means shield at least the first and second heat exchange exhaust flow paths in the first and second exhaust flow paths, The air supply shielding means performs a defrost operation in a cold district where the outdoor temperature is extremely low by shielding at least the upstream side of the heat exchange air flow path of the first and second air supply paths. The first and second heat exchangers can suppress the influence of dew condensation and icing without contact with the extremely low outdoor air.

  The heat exchange ventilator according to claim 17 is the heat exchange ventilator according to claim 16, wherein the first and second exhaust flow shielding means are provided in the first and second exhaust flow paths. Are first and second outdoor exhaust shielding shields, and the first and second outdoor exhaust shielding shields shield and open the downstream side of the first and second heat exchange exhaust passages. In the first and second air supply paths, the first and second air supply shielding means are first and second outdoor air supply shielding shields, and the first and second outdoor air supply openings are provided. The shielding damper shields and opens the upstream side of the first and second heat exchange air flow paths, and performs the heat exchange air operation during icing and the heat exchange air operation during normal operation. The first and second outdoor vent shielding dampers and the first and second The outdoor air inlet shielding damper is opened, and the first and second outdoor exhaust air shielding shields and the first and second outdoor air inlet shielding dampers are shielded when the defrost operation is performed. By switching the first and second outdoor air outlet shielding dampers and switching the first and second outdoor air inlet shielding dampers, heat exchange air operation during freezing and heat exchange during normal times The first and second outdoor exhaust shielding shields shield the downstream side of the first and second heat exchange exhaust passages, and the first and second outdoor supply airs are switched between the air operation and the defrost operation. The mouth shielding damper shields the upstream side of the first and second heat exchange air flow paths, so that when the defrost operation is performed in a cold area where the outdoor temperature is extremely low, the first and second heat exchangers Is very low outdoors Without contact with the outside air, it is possible to suppress the influence of condensation and freezing.

  The heat exchange ventilator according to claim 18 is the heat exchange ventilator according to claims 6 and 17, wherein the first and second exhaust flows in the first and second exhaust flow paths. The shielding means is first and second indoor exhaust port shielding dampers, and the first and second indoor exhaust port shielding dampers shield and open the upstream side of the first and second heat exchange exhaust passages. And in the first and second air supply paths, the first and second air supply shielding means are first and second indoor air inlet shielding dampers, and the first and second indoor air supply The mouth shielding damper shields and opens the downstream side of the first and second heat exchange air flow paths, and performs the heat exchange air operation during icing and the heat exchange air operation during normal operation. The first and second indoor exhaust shielding dampers and the first and second The indoor air inlet shielding damper is opened, and when the defrost operation using the first and second exhaust flow circulation paths is performed, the first and second indoor exhaust shielding shields are opened, and the first The first and second indoor air inlet shielding dampers are configured to be shielded or opened. The first and second indoor air outlet shielding dampers are switched, and the first and second indoor air inlet shielding dampers are used. When switching between the heat exchange air operation during freezing, the heat exchange air operation during normal operation, and the defrost operation, and when performing the defrost operation using the first and second exhaust flow circulation paths, When the first and second indoor air supply opening shielding dampers are shielded, it is possible to improve the airtightness of the path of the air supply air that is performing the defrost operation.

  The heat exchange ventilator according to claim 19 is the heat exchange ventilator according to claims 7 and 18, when the defrost operation using the first and second air supply circulation paths is performed. The first and second indoor exhaust port shielding dampers are configured to be shielded or opened, and the first and second indoor air supply port shielding dampers are configured to be opened. By switching the shielding damper and switching the first and second indoor air inlet shielding dampers, the heat exchange air operation during freezing, the heat exchange air operation during normal operation, and the defrost operation are switched. When performing the defrost operation using the second air supply air circulation path, shielding the first and second indoor exhaust port shielding dampers improves the airtightness of the exhaust flow path performing the defrost operation. It can be.

  In addition, the heat exchange ventilator according to claim 20 performs defrosting operation using the first and second supply airflow circulation paths for the heat exchange ventilator according to claims 9 and 18. The first and second indoor exhaust port shielding dampers and the first and second indoor air supply port shielding dampers are configured to be opened, and the first and second indoor exhaust port shielding dampers are switched. By switching the first and second indoor air inlet shielding dampers, it is possible to switch between the heat exchange air operation during freezing, the heat exchange air operation during normal operation, and the defrost operation.

  Further, the heat exchange ventilator according to claim 21 is the first and second indoors in the first and second exhaust flows of the heat exchange ventilator according to any of claims 17 to 20. The exhaust shielding damper shields and opens the first and second indoor exhaust openings, and the first and second outdoor exhaust shielding shields shield and open the first and second outdoor exhaust openings. In the first and second airflows, the first and second outdoor air inlet shielding dampers shield and open the first and second outdoor air inlets, and the first and second indoor air inlet shields. The damper is configured to shield and open the first and second indoor air supply ports, the first and second indoor exhaust ports, the first and second outdoor exhaust ports, the first and second Second outdoor air inlet and first and second indoor air inlets By switching the damper, the first and second exhaust flow paths and the first and second supply air flow paths can be easily shielded and opened, so that heat exchange during freezing can be achieved. It is possible to easily switch between the air operation, the normal heat exchange air operation, and the defrost operation.

  A heat exchange ventilator according to claim 22 is the heat exchange ventilator according to any of claims 8 and 9, wherein the first and second blowers are the first and second exhaust vanes. First and second air supply blades are provided, and the first and second exhaust blades are arranged in the first and second exhaust flows when performing heat exchange air operation during freezing and normal heat exchange air operation. When the defrost operation is performed, the first and second exhaust air circulation paths of the first and second indoor air circulation flows are blown, and the first and second air supply blades are frozen. When the heat exchange air operation and the normal heat exchange air operation are performed, the first and second supply air flow paths are blown, and when the defrost operation is performed, the first and second indoor air circulation flows are The first and second supply air circulation paths are blown, and the first and second exhaust vanes and The first and second air supply blades are configured to blow the first and second supply air flow circulation paths of the first and second indoor air circulation flows when performing the defrost operation. Yes, each of the first and second blowers is a single blower, and can perform heat exchange air operation during freezing, normal heat exchange air operation, and defrost operation.

  A heat exchange type ventilator according to claim 23 is the heat exchange type ventilator according to claim 2, wherein the first and second heat exchangers are ventilated in the heat exchange air operation during freezing. The flow rates of the first and second exhaust streams and the first and second supply air streams are the same as the first and second exhaust streams that are passed through the first and second heat exchangers in normal heat exchange operation. The first and second supply airflows have the same air volume, and the first and second exhaust airflows and the first and second supply airflows of the heat exchange air operation during icing, and the normal time By making the air volume of the first and second exhaust air flow and the first and second air supply air flow equal to each other in the heat exchange air operation of the heat exchanger in the cold district where the outdoor temperature is extremely low or when the outdoor temperature is high, Regardless of the region and time of use of the exchangeable ventilation system, the necessary replacements for houses and buildings The air flow can be obtained with heat recovery.

  Further, the heat exchange ventilator according to claim 24 is the heat exchange ventilator according to claim 2, wherein the first and second exhaust flows and the first and second exhaust flows in the normal heat exchange air operation. The second supply airflow is configured to ventilate the first and second heat exchangers once. The first and second exhaust airflows and the first and second supply airflows are the first and second airflows. When ventilation is performed in series with respect to the second heat exchanger, the ventilation resistance by the first and second heat exchangers increases every time the first heat exchanger and the second heat exchanger are passed. The second blower becomes larger and consumes more power, but the first and second exhaust flows and the first and second supply airflows are once in parallel to the first and second heat exchangers. By allowing the first and second exhaust streams and the first and second supply air streams to pass through the first and second Since the air is dispersed and passed through the exchanger, the ventilation speed of the first and second heat exchangers is reduced and the heat exchange efficiency is improved by reducing the wind speed passing through the first and second heat exchangers. Can be compatible.

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

(Embodiment 1)
As shown in FIG. 1, the heat exchange ventilator 1 includes a first main body box 2a and a second main body box 2b, and the first main body box 2a includes a first heat exchanger 3a and a second main body box 2b. One blower 4a, a first indoor exhaust port 5a, a first outdoor exhaust port 6a, a first outdoor air supply port 7a, a first indoor air supply port 8a, and a first exhaust flow shield The first indoor exhaust port shielding damper 23a and the first outdoor exhaust port shielding damper 24a are used as means, and the first outdoor air supply port shielding damper 25a and the first indoor air supply port shielding are used as the first air supply shielding means. It is the structure provided with the damper 26a.

  Inside the first main body box 2a, the first blower 4a generates a first exhaust flow 16a for discharging indoor air to the outside by a first exhaust blade 15a fixed to the rotating shaft of the first electric motor 14a. The first exhaust air flow 19a for supplying outdoor air into the room by the first exhaust air flow path 17a to be ventilated and the first air supply blade 18a fixed to the rotary shaft of the first electric motor 14a The first supply air flow path 20a is formed so as to intersect at one place, and the first heat exchange exhaust passage 21a through which the first exhaust flow 16a passes and the first passage A first heat exchanger 3a having a first heat exchange air flow path 22a through which the air supply air 19a passes is provided. The first heat exchanger 3a is formed by alternately stacking a plurality of first heat exchange exhaust passages 21a and first heat exchange air supply passages 22a. In the first exhaust flow path 17a, the first indoor exhaust port shielding damper 23a shields and opens the first indoor exhaust port 5a, and the first outdoor exhaust port shielding damper 24a serves as the first outdoor exhaust port. 6a is configured to shield and open. When the indoor air is the upstream side of the first heat exchange exhaust passage 21a in the first exhaust flow 16a, the first indoor exhaust port shielding damper 23a is upstream of the first heat exchange exhaust passage 21a. The first outdoor exhaust outlet shielding damper 24a shields and opens the downstream side of the first heat exchange exhaust passage 21a. In the first air supply path 20a, the first outdoor air inlet shielding damper 25a shields and opens the first outdoor air inlet 7a, and the first indoor air inlet shielding damper 26a It is the structure which shields and open | releases the one indoor air inlet 8a. When the outdoor air is the upstream side of the first heat exchange air flow channel 22a in the first air supply air flow 19a, the first outdoor air supply port shielding damper 25a is connected to the first heat exchange air flow channel 22a. The upstream indoor air inlet shield damper 26a performs shielding and opening on the upstream side, and shields and opens the downstream side of the first heat exchange air flow path 22a.

  The first main body box 2a of the heat exchange type ventilator 1 configured as described above is shown in FIG. 2, and the heat exchange air operation will be described below.

  As shown in FIG. 2, in the first exhaust flow 16a (solid arrow in the figure), when the indoor air is located upstream of the first heat exchange exhaust passage 21a, the first exhaust flow 16a Of the air (RA) flows from the first indoor exhaust port 5a to the upstream side of the first heat exchange exhaust passage 21a and passes through the first heat exchange exhaust passage 21a. The first exhaust air flow path 17a is discharged through the first outdoor exhaust port 6a through the heat exchange and flows out as exhaust air (EA) to the downstream side of the first heat exchange exhaust passage 21a. Is forming. Moreover, when the outdoor air is the upstream side of the first heat exchange air flow path 22a in the first air supply air 19a (broken arrow in the figure), the first air supply 19a is the outdoor air (OA). Flows into the upstream side of the first heat exchange air flow path 22a from the first outdoor air supply port 7a and exchanges heat with the first exhaust flow 16a when passing through the first heat exchange air flow path 22a. The first supply air flow path 20a is discharged to the downstream side of the first heat exchange air flow path 22a as supply air (SA) and discharged into the room from the first indoor supply port 8a. is doing.

  Here, the first main body box 2a includes a first exhaust gas recirculation port 29a, a first air supply recirculation port 32a, a first air supply / exhaust recirculation port 35a, and a first recirculation shielding means as a first recirculation port. The first exhaust gas recirculation shielding damper 30a, the first air supply air recirculation shielding damper 33a, and the first air supply / exhaust gas recirculation shielding damper 36a are provided.

  Then, in the first heat exchange air operation, the first exhaust gas recirculation port 29a, the first air supply recirculation port 32a, and the first air supply / exhaust gas recirculation port 35a, which are the first recirculation ports, are connected to the first recirculation shield. The first exhaust air recirculation shielding damper 30a, the first air supply recirculation shield damper 33a, and the first air supply / exhaust recirculation shield damper 36a are used as the means, and the first indoor exhaust outlet shielding damper 23a and the first outdoor exhaust air are shielded. The opening shielding damper 24a is opened, and the first exhaust flow 16a is ventilated to the first exhaust flow path 17a by the first exhaust blade 15a, and the first outdoor air supply opening shielding damper 25a and the first indoor The air supply opening shielding damper 26a is opened, and the first air supply air 19a is ventilated to the first air supply air path 20a by the first air supply blades 18a, so that the first heat exchanger 3a becomes the first heat exchanger 3a. Between the exhaust air flow 16a and the first air supply air 19a While the heat exchange, for feeding air of the exhaust and outdoor air of the indoor air.

  Here, when the first heat exchange air operation described in FIG. 2 is continued in a cold district where the outdoor temperature is extremely low, the first exhaust flow 16a including the warm humidity in the room becomes the first at a very low temperature. The air supply air 19a gradually condenses and freezes in the first heat exchange exhaust passage 21a. As the ice freezes, the heat exchange function gradually decreases and the original heat exchange operation cannot be continued.

  Therefore, the first main body box 2a of the heat exchange type ventilation apparatus 1 configured as described above is shown in FIGS.

  As shown in FIG. 3, in the first exhaust flow 16a (FIG. 2), when the indoor air is located upstream of the first heat exchange exhaust passage 21a, the first indoor air circulation flow 27a (in the drawing) A dotted arrow) indicates that the room air passes through the first heat exchanger 3a from the upstream side of the first heat exchange exhaust passage 21a and returns to the room from the downstream side of the first heat exchange exhaust passage 21a. An exhaust flow circulation path is formed. In the first exhaust flow circulation path, the first exhaust recirculation port 29a is provided on the downstream side of the first heat exchange exhaust passage 21a, and the first exhaust recirculation shield damper 30a shields and opens the exhaust recirculation port 29a. By doing so, the first exhaust air circulation path of the first indoor air circulation flow 27a is shielded and opened.

  As shown in FIG. 4, when the outdoor air is used as the upstream side of the first heat exchange air flow path 22a in the first air supply air flow 19a (FIG. 2), the first indoor air circulation flow 27a (FIG. The middle dotted line arrow) allows room air to pass from the upstream side of the first heat exchange air flow path 22a to the first heat exchanger 3a and to return to the room from the downstream side of the first heat exchange air flow path 22a. A first air supply circulation path is formed. In the first supply air circulation path, the first supply air recirculation port 32a is provided on the upstream side of the first heat exchange air supply passage 22a, and the first supply air recirculation shielding damper 33a shields the supply air recirculation port 32a. And opening the first air supply air circulation path of the first indoor air circulation flow 27a.

  Further, as shown in FIG. 5, in the first exhaust flow 16a (FIG. 2), the indoor air is set upstream of the first heat exchange exhaust passage 21a, and the outdoor in the first supply air flow 19a (FIG. 2). Is the upstream side of the first heat exchange air flow path 22a, the first indoor air circulation flow 27a (dotted arrow in the figure) is the second from the upstream side of the first heat exchange exhaust flow path 21a. The room air is passed through one heat exchanger 3a, then flows from the downstream side of the first heat exchange exhaust passage 21a to the upstream side of the first heat exchange supply passage 22a, and further the first heat exchange A first air supply / exhaust flow circulation path is formed that passes through the first heat exchanger 3a from the upstream side of the air supply passage 22a and returns to the room from the downstream side of the first heat exchange air supply passage 22a. In the first supply / exhaust flow circulation path, the first supply / exhaust recirculation port 35a is provided between the downstream side of the first heat exchange exhaust passage 21a and the upstream side of the first heat exchange supply passage 22a, The one air supply / exhaust recirculation shield damper 36a is configured to shield and open the first air supply / exhaust flow circulation path of the first indoor air circulation flow 27a by shielding and opening the air supply / exhaust recirculation port 35a.

  As shown in FIG. 3, in the first defrost operation using the first exhaust flow circulation path, the first indoor air circulation flow 27a has the first indoor air (RA) generated by the first exhaust blade 15a. When the air flows into the upstream side of the first heat exchange exhaust passage 21a from the indoor exhaust port 5a and passes through the first heat exchange exhaust passage 21a, the condensation or icing in the first heat exchange exhaust passage 21a is melted. , Dried, and then returns from the downstream side of the first heat exchange exhaust passage 21a to the room through the first exhaust recirculation port 29a. The damper is opened and closed at this time by opening the first indoor exhaust port shielding damper 23a and the first exhaust gas recirculation shielding damper 30a, and the first outdoor exhaust port shielding damper 24a and the first outdoor air supply port shielding damper. 25a, the first supply air recirculation shield damper 33a and the first air supply / exhaust recirculation shield damper 36a are shielded, and the first indoor air supply port shield damper 26a is shielded and / or opened.

  As shown in FIG. 4, in the first defrost operation using the first air supply air circulation path, the first indoor air circulation flow 27a has the first indoor air (RA) by the first air supply blade 18a. From the supply air recirculation port 32a to the upstream side of the first heat exchange air flow channel 22a and when passing through the first heat exchange air flow channel 22a, condensation or icing in the first heat exchange air flow channel 21a. Is then promoted to melt and dry, and then returns from the downstream side of the first heat exchange air flow path 22a to the room through the first indoor air supply port 8a. At this time, the damper is opened and closed by opening the first air recirculation shield damper 33a and the first indoor air inlet shield damper 26a, and opening the first outdoor air outlet shield damper 24a and the first outdoor air inlet. The shielding damper 25a, the first exhaust gas recirculation shielding damper 30a, and the first air supply / exhaust gas recirculation shielding damper 36a are shielded, and the first indoor exhaust port shielding damper 23a is shielded and / or opened.

  In the first defrost operation using the first air supply / exhaust flow circulation path, as shown in FIG. 5, the first indoor air circulation flow 27a includes the first exhaust blade 15a and / or the first air supply blade 18a. As a result, indoor air (RA) flows from the first indoor exhaust port 5a to the upstream side of the first heat exchange exhaust passage 21a and passes through the first heat exchange exhaust passage 21a. Condensation and icing in the exchange exhaust flow path 21a are melted and dried, and then passed from the downstream side of the first heat exchange exhaust flow path 21a through the first air supply / exhaust recirculation port 35a to the first heat exchange air supply flow path When the first heat exchange air flow passage 22a passes from the upstream side of the first heat exchange air flow passage 22a and further passes through the first heat exchange air flow passage 22a, condensation or icing of the first heat exchange exhaust flow passage 21a occurs. Melting and drying are promoted, and then the first indoor air inlet 8a from the downstream side of the first heat exchange air flow path 22a. Back to the room to pass through. At this time, the damper is opened and closed by opening the first indoor exhaust port shielding damper 23a, the first air supply / exhaust recirculation shielding damper 36a, and the first indoor air supply port shielding damper 26a, and opening the first outdoor exhaust port. The shielding damper 24a, the first outdoor air supply opening shielding damper 25a, the first exhaust gas recirculation shielding damper 30a, and the first air supply recirculation shielding damper 33a perform shielding.

  The first main body box 2a shown in FIG. 6 uses the first defrost operation using the first exhaust flow circulation path shown in FIG. 3 and the first supply air circulation path shown in FIG. The first defrost operation is an operation in which the first defrost operation is performed simultaneously or alternately. The first defrost operation using the first exhaust flow circulation path is performed when the first defrost operation passes through the first heat exchange exhaust passage 21a. In the first defrost operation using the first air supply air circulation path, the first defrost operation using the first air supply air circulation path is performed when the first heat exchange air supply path 22a passes through the first defrost operation. By accelerating the melting and drying of the condensation and freezing of the heat exchange exhaust passage 21a, the influence of the condensation and freezing of the first heat exchange exhaust passage 21a can be recovered in a short time.

  In the first defrosting operation shown in FIGS. 3 to 6, the first exhaust flow shielding means is at least downstream of the first heat exchange exhaust passage 21 a of the first exhaust flow passage 17 a for opening and closing the damper. The first outdoor air outlet shielding damper 24a is shielded, and the first air supply air shielding means is at least upstream of the heat exchange air flow passage 22a in the first air supply air passage 20a. Is configured, that is, the first outdoor air inlet shielding damper 25a is shielded.

  The configuration of the operation control of the first main body box 2a of the heat exchange type ventilator 1 configured as described above is shown in FIG. 2 and will be described below.

  As shown in FIG. 2, the first main body box 2a includes a first indoor environment detection means 37a for detecting the indoor temperature and / or indoor humidity of the first exhaust flow 16a, It is the 1st outdoor temperature detection means 38a which detects the outdoor temperature of the current supply airflow 19a. The first indoor environment detection means 37a is provided in the vicinity of the first indoor exhaust port 5a of the first exhaust flow 16a, and the first outdoor temperature detection means 38a is the first outdoor supply air of the first supply airflow 19a. It is provided in the vicinity of the mouth 7a.

  Here, the structure of the 2nd main body box 2b of the heat exchange type ventilation apparatus 1 comprised as mentioned above is demonstrated below.

  The second main body box 2b has the same configuration as the first main body box 2a, and detailed description and drawings are omitted. The second body box 2b includes a second heat exchanger 3b, a second blower 4b, a second indoor exhaust port 5b, a second outdoor exhaust port 6b, and a second outdoor air supply port 7b. A second indoor air supply port 8b, a second exhaust gas recirculation port 29b, a second air supply recirculation port 32b, a second air supply / exhaust gas recirculation port 35b, and a second exhaust gas flow. The second indoor exhaust outlet shielding damper 23b and the second outdoor exhaust outlet shielding damper 24b are used as shielding means, and the second outdoor air inlet shielding damper 25b and the second indoor air supply opening are provided as second supply airflow shielding means. The shielding damper 26b, the second exhaust recirculation shielding damper 30b as the second recirculation shielding means, the second air supply recirculation shielding damper 33b, the second air supply / exhaust recirculation shielding damper 36b, and the second detection means as the second recirculation shielding means. Supply air temperature detecting means 37b, second outdoor temperature detecting means 38b, A second motor 14b, a second exhaust blade 15b, a second exhaust flow 16b, a second exhaust flow path 17b, a second supply blade 18b, a second supply air flow 19b, A second air flow path 20b, a second heat exchange exhaust flow path 21b, a second heat exchange air flow path 22b, a second indoor air circulation flow 27b, a second exhaust flow circulation path, It is the structure provided with the 2nd supply air flow circulation path and the 2nd supply / exhaust flow circulation path.

  Operation control of the first main body box 2a and the second main body box 2b of the heat exchange type ventilator 1 configured as described above will be described below.

  In this specification, the first main body box 2a is used when condensation or icing occurs in the first and / or second heat exchange exhaust passages 21a and 21b in a cold district where the outdoor temperature is extremely low. The heat exchange air operation is the heat exchange air operation during the first freezing, and the heat exchange air operation using the second body box 2b is the heat exchange air operation during the second ice freezing, and the first body box The defrost operation using 2a is the first defrost operation, and the defrost operation using the second main body box 2b is the second defrost operation. When the outdoor temperature is high and no dew condensation or icing occurs in the first and second heat exchange exhaust passages 21a and 21b, normal operation using the first main body box 2a and the second main body box 2b. Heat exchange air operation. In addition, about the heat exchange air operation using the 1st main body box 2a, the heat exchange air operation at the time of the 1st freezing and the heat exchange air operation at the normal time are the configuration of the first main body box 2a and the way of ventilation. As for the heat exchange air operation using the second main body box 2b, the second heat exchange air operation during freezing and the normal heat exchange air operation are the same as those of the second main body box 2b. The method is the same.

  When the heat exchange ventilator 1 starts operation, the first heat exchanger 3a of the first main body box 2a and the second heat exchanger 3b of the second main body box 2b are used. The normal heat exchange air operation was performed. The first and second main body boxes 2a and 2b are used to detect the indoor temperature and / or indoor humidity of the first and second exhaust streams 16a and 16b by the first and / or second indoor environment detection means 37a and 37b. Further, the outdoor temperature of the first and / or second air supply air 19a, 19b is detected by the first and / or second outdoor temperature detecting means 38a, 38b.

  Here, in a cold region where the outdoor temperature is extremely low, if the normal heat exchange air operation is continued, the first and / or second exhaust streams 16a and 16b including the warm humidity inside the room have a very low temperature. By the first and / or second supply airflows 19a and 19b, the first and / or second heat exchange exhaust passages 21a and 21b are gradually condensed and frozen. Condensation occurs in the first and / or second heat exchange exhaust passages 21a and 21b and freezes, so that the first and / or second heat exchange exhaust passages 21a and 21b are affected by freezing. The relationship between the outdoor temperature and the indoor environment (indoor temperature and / or indoor humidity) is set in advance through experiments, calculations, and the like.

  The outdoor temperature gradually decreases, and the first and / or second indoor environment detection means 37a, 37b and the first and / or second outdoor temperature detection means 38a, 38b When detecting the relationship between the outdoor temperature and the indoor environment (indoor temperature and / or indoor humidity) that are affected by dew condensation and icing in the second heat exchange exhaust passages 21a and 21b, the heat exchanger of one main body box The heat exchange air operation at the time of freezing is performed, the heat exchanger of the other main body box performs the defrost operation, and the first and / or second heat exchange exhaust passages 21a and 21b are not affected by dew condensation or freezing. The heat exchange air operation during icing and the defrost operation are switched in sequence.

  Then, the outdoor temperature rises, and the first and / or second indoor environment detection means 37a, 37b and the first and / or second outdoor temperature detection means 38a, 38b cause the first and second heat exchange exhaust. When the relationship between the outdoor temperature and the indoor environment (indoor temperature and / or indoor humidity) that is not affected by condensation or icing in the flow paths 21a and 21b is detected, the first heat exchanger 3a of the first main body box 2a. Then, the normal heat exchange air operation using the two heat exchangers of the second heat exchanger 3b of the second main body box 2b is performed.

  The operation control of the heat exchange type ventilator 1 is provided in the first main body box 2a, the first indoor environment detection means 37a and the first outdoor temperature detection means 38a, and the second main body box 2b. Whether or not both of the second indoor environment detection means 37b and the second outdoor temperature detection means 38b are used, dew condensation or icing occurs in the first and / or second heat exchange exhaust passages 21a and 21b. If the heat exchange air operation and the defrost operation at the time of icing are switched in order until the influence of dew condensation and icing is eliminated, there is no difference in the effect.

  In addition, the heat exchange ventilator 1 includes first and / or second detection means for detecting the effects of dew condensation and icing in the first and / or second heat exchange exhaust passages 21a and 21b. Although it has been described that operation control is performed using the second indoor environment detection means 37a, 37b and the first and / or second outdoor temperature detection means 38a, 38b, the first and / or second heat exchange is described. Other detection means may be used as long as the influence of dew condensation and icing in the exhaust passages 21a and 21b can be detected.

  A heat exchange air operation and a defrost operation during freezing in winter in a cold region of the heat exchange type ventilator 1 configured as described above are shown in FIGS. 7 to 10 and will be described below.

  The operation of the heat exchange type ventilator 1 shown in FIGS. 7a and 7b is the first and second freezing using the first heat exchanger 3a and the second heat exchanger 3b shown in FIG. 2 alternately. Heat exchange air operation at the time, and first and second defrost operations using the first and second exhaust flow circulation paths shown in FIG.

  As shown in FIG. 7a, the heat exchange ventilator 1 includes a first exhaust air flow 16a (solid arrow in the figure) and a first supply air flow 19a (broken arrow in the figure) in the first heat exchanger 3a. ), The first heat exchanger 3a performs the heat exchange air operation during the first icing with the first exhaust flow 16a and the first air supply air 19a, and the second heat exchanger 3b A second indoor air circulation flow 27b (indicated by a dotted line in the figure) of the room air is ventilated, and the second heat exchanger 3b performs a second defrost operation using the second exhaust flow circulation path.

  In the second heat exchanger 3b, the warm second indoor air circulation flow is melted and dried by the warm second indoor air circulation flow 27b flowing through the second heat exchange exhaust passage 21b and dried. Since only 27b was flowing, the original dew condensation and freezing disappeared, and it returns to a dry and normal state.

  When the heat exchange air operation during the first freezing is continued at a low temperature such that the outdoor temperature is less than 0 ° C., the first heat exchanger 3a is warmed by the cold first supply air flow 19a and the warm first exhaust flow 16a. In the first heat exchange exhaust passage 21a through which the water flows, condensation gradually forms and freezes. As the ice freezes, the heat exchange function gradually decreases, but the first and / or second indoor environment detection means 37a, 37b and the first and / or second outdoor temperature detection means 38a, 38b. Thus, before the original heat exchange air operation cannot be performed, the heat exchange air operation during icing and the defrost operation are switched.

  Next, as shown in FIG. 7b, the heat exchange ventilator 1 includes a second exhaust air flow 16b (solid arrow in the figure) and a second air supply air 19b (in the figure) in the second heat exchanger 3b. The second heat exchanger 3b performs the heat exchange operation during the second icing with the second exhaust flow 16b and the second air supply air 19b, and the first heat exchanger 3a. A first indoor air circulation flow 27a (dotted arrow in the figure) of the indoor air is ventilated, and the first heat exchanger 3a performs the first defrost operation using the first exhaust flow circulation path. Yes.

  Even if dew condensation or icing occurs in the first heat exchange exhaust passage 21a by the operation of FIG. 7a, the first heat exchanger 3a has the first heat exchange exhaust in the first heat exchanger 3a. Condensation and freezing were melted and dried by the warm first indoor air circulation flow 27a flowing through the flow path 21a, and only the warm first indoor air circulation flow 27a was flowing, so the initial condensation and freezing disappeared. Return to dry and normal condition.

  When the heat exchange air operation during the second freezing is continued at a low temperature such that the outdoor temperature is less than 0 ° C., the second heat exchanger 3b is warmed by the cold second supply air flow 19b and the second exhaust air flow 16b is warm. Condensation and icing gradually occur in the second heat exchange exhaust passage 21b through which the air flows. As the ice freezes, the heat exchange function gradually decreases, but the first and / or second indoor environment detection means 37a, 37b and the first and / or second outdoor temperature detection means 38a, 38b. Thus, before the original heat exchange air operation cannot be performed, the heat exchange air operation during icing and the defrost operation are switched.

  Even when the outdoor operation is performed in a cold region where the outdoor temperature is extremely low by sequentially switching between the heat exchange air operation and the defrost operation shown in FIGS. 7a and 7b, the first and second heat exchange exhaust passages The heat exchange air operation at the time of original icing can be continued without being affected by condensation or icing at 21a and 21b.

  The operation of the heat exchange type ventilator 1 shown in FIGS. 8a and 8b is performed by first and second icing using the first heat exchanger 3a and the second heat exchanger 3b shown in FIG. 2 alternately. Heat exchanging air operation and first and second defrosting operations using the first and second air supply circulation paths shown in FIG.

  As shown in FIG. 8a, the heat exchanging ventilator 1 includes a first exhaust air flow 16a (solid arrow in the figure) and a first air supply air 19a (broken arrow in the figure) in the first heat exchanger 3a. ) Is ventilated, and the first heat exchanger 3a performs the heat exchange air operation during the first icing with the first exhaust flow 16a and the first air supply air 19a, and the second heat exchanger 3b A second indoor air circulation flow 27b (indicated by a dotted line in the figure) of the room air is ventilated, and the second heat exchanger 3b performs a second defrost operation using the second exhaust flow circulation path.

  In the second heat exchanger 3b, the dew condensation and freezing in the second heat exchange exhaust passage 21b are melted and dried by the warm second indoor air circulation flow 27b flowing through the second heat exchange supply passage 22b. The initial condensation and icing are eliminated, and the product returns to a dry and normal state.

  When the heat exchange air operation during the first freezing is continued at a low temperature such that the outdoor temperature is less than 0 ° C., the first heat exchanger 3a is warmed by the cold first supply air flow 19a and the warm first exhaust flow 16a. In the first heat exchange exhaust passage 21a through which the water flows, condensation gradually forms and freezes. As the ice freezes, the heat exchange function gradually decreases, but the first and / or second indoor environment detection means 37a, 37b and the first and / or second outdoor temperature detection means 38a, 38b. Thus, before the original heat exchange air operation cannot be performed, the heat exchange air operation during icing and the defrost operation are switched.

  Next, as shown in FIG. 8b, the heat exchanging ventilator 1 includes a second exhaust air flow 16b (solid arrow in the figure) and a second air supply air 19b (in the figure) in the second heat exchanger 3b. The second heat exchanger 3b performs the heat exchange operation during the second icing with the second exhaust flow 16b and the second air supply air 19b, and the first heat exchanger 3a. A first indoor air circulation flow 27a (dotted arrow in the figure) of the indoor air is ventilated, and the first heat exchanger 3a performs the first defrost operation using the first exhaust flow circulation path. Yes.

  Even if dew condensation or icing has occurred in the first heat exchange exhaust passage 21a by the operation of FIG. 8a, the first heat exchanger 3a has a first heat exchange in the first heat exchanger 3a. The warm first indoor air circulation flow 27a flowing through the air flow path 22a promotes melting and drying of dew condensation and icing in the first heat exchange exhaust flow path 21a. Return to the correct state.

  When the heat exchange air operation during the second freezing is continued at a low temperature such that the outdoor temperature is less than 0 ° C., the second heat exchanger 3b is warmed by the cold second supply air flow 19b and the second exhaust air flow 16b is warm. Condensation and icing gradually occur in the second heat exchange exhaust passage 21b through which the air flows. As the ice freezes, the heat exchange function gradually decreases, but the first and / or second indoor environment detection means 37a, 37b and the first and / or second outdoor temperature detection means 38a, 38b. Thus, before the original heat exchange air operation cannot be performed, the heat exchange air operation during icing and the defrost operation are switched.

  The first and second heat exchange exhaust passages can be operated even in the cold region where the outdoor temperature is extremely low by sequentially switching between the heat exchange air operation and the defrost operation shown in FIGS. 8a and 8b. The heat exchange air operation at the time of original icing can be continued without being affected by condensation or icing at 21a and 21b.

  The operation of the heat exchange type ventilator 1 shown in FIGS. 9a and 9b is the first and second freezing using the first heat exchanger 3a and the second heat exchanger 3b shown in FIG. 2 alternately. Heat exchange air operation at the time, and first and second defrost operations using the first and second air supply air circulation paths shown in FIG.

  As shown in FIG. 9a, the heat exchanging ventilator 1 includes a first exhaust flow 16a (solid arrow in the figure) and a first air supply air 19a (broken arrow in the figure) in the first heat exchanger 3a. ), The first heat exchanger 3a performs the heat exchange air operation during the first icing with the first exhaust flow 16a and the first air supply air 19a, and the second heat exchanger 3b A second indoor air circulation flow 27b (indicated by a dotted line in the figure) of the indoor air is ventilated, and the second heat exchanger 3b performs a second defrost operation using the second supply / exhaust flow circulation path. .

  In the second heat exchanger 3b, condensation and icing are melted and dried by the warm second indoor air circulation flow 27b flowing through the second heat exchange exhaust passage 21b, and then the second heat exchange. The warm second indoor air circulation flow 27b flowing through the air supply flow path 22b promotes melting and drying of condensation and icing in the second heat exchange exhaust flow path 21b, and in the second heat exchange exhaust flow path 21b. By the second defrost operation using the second hawaiian air circulation circuit for condensation, freezing, and drying, the original condensation and freezing disappear and the dry and normal state is restored.

  When the heat exchange air operation during the first freezing is continued at a low temperature such that the outdoor temperature is less than 0 ° C., the first heat exchanger 3a is warmed by the cold first supply air flow 19a and the warm first exhaust flow 16a. In the first heat exchange exhaust passage 21a through which the water flows, condensation gradually forms and freezes. As the ice freezes, the heat exchange function gradually decreases, but the first and / or second indoor environment detection means 37a, 37b and the first and / or second outdoor temperature detection means 38a, 38b. Thus, before the original heat exchange air operation cannot be performed, the heat exchange air operation during icing and the defrost operation are switched.

  Next, as shown in FIG. 9b, the heat exchange ventilator 1 includes a second exhaust air flow 16b (solid arrow in the figure) and a second air supply air 19b (in the figure) in the second heat exchanger 3b. The second heat exchanger 3b performs the heat exchange operation during the second icing with the second exhaust flow 16b and the second air supply air 19b, and the first heat exchanger 3a. The first indoor air circulation flow 27a (dotted arrow in the figure) of the indoor air is ventilated, and the first heat exchanger 3a performs the first defrost operation using the first supply / exhaust flow circulation path. ing.

  Even if dew condensation or icing has occurred in the first heat exchange exhaust passage 21a by the operation of FIG. 9a, the first heat exchanger 3a has the first heat exchange exhaust in the first heat exchanger 3a. Condensation and freezing are melted and dried by the warm first indoor air circulation flow 27a flowing through the flow path 21a, and then, by the warm first indoor air circulation flow 27a flowing through the first heat exchange air flow path 22a. , Melting and drying of dew condensation and icing in the first heat exchange exhaust passage 21a are promoted, and dew condensation and icing in the first heat exchange exhaust passage 21a are melted and dried in the first supply of one flow. The first defrost operation using the haiku air circulation route eliminates initial condensation and icing, and returns to a normal and dry state.

  When the heat exchange air operation during the second freezing is continued at a low temperature such that the outdoor temperature is less than 0 ° C., the second heat exchanger 3b is warmed by the cold second supply air flow 19b and the second exhaust air flow 16b is warm. Condensation and icing gradually occur in the second heat exchange exhaust passage 21b through which the air flows. As the ice freezes, the heat exchange function gradually decreases, but the first and / or second indoor environment detection means 37a, 37b and the first and / or second outdoor temperature detection means 38a, 38b. Thus, before the original heat exchange air operation cannot be performed, the heat exchange air operation during icing and the defrost operation are switched.

  9A and 9B, the first and second heat exchange exhaust passages can be operated even in the cold region where the outdoor temperature is extremely low by sequentially switching between the heat exchange air operation and the defrost operation during freezing. The heat exchange air operation at the time of original icing can be continued without being affected by condensation or icing at 21a and 21b.

  The operation of the heat exchange type ventilator 1 shown in FIGS. 10a and 10b is performed by first and second icing using the first heat exchanger 3a and the second heat exchanger 3b shown in FIG. 2 alternately. Heat exchange air operation, first and second defrost operations using the first and second exhaust flow circulation paths shown in FIG. 6, and first and second supply air circulation circulation paths This is an operation in which the first and second defrost operations are performed simultaneously or alternately.

  As shown in FIG. 10a, the heat exchange ventilator 1 includes a first exhaust air flow 16a (solid arrow in the figure) and a first air supply air 19a (broken arrow in the figure) in the first heat exchanger 3a. ) Is ventilated, and the first heat exchanger 3a performs the heat exchange air operation during the first icing with the first exhaust flow 16a and the first air supply air 19a, and the second heat exchanger 3b The second indoor air circulation flow 27b (dotted arrow in the figure) of the indoor air is ventilated, and the second heat exchanger 3b performs the second defrost operation using the second exhaust flow circulation path, The second defrosting operation using the air supply / circulation path is simultaneously or alternately performed.

  In the second heat exchanger 3b, condensation and freezing are melted and dried by the warm second indoor air circulation flow 27b flowing through the second heat exchange exhaust passage 21b. Further, the warm second indoor air circulation flow 27b flowing through the second heat exchange air supply passage 22b promotes melting and drying of condensation and icing in the second heat exchange exhaust passage 21b. The second defrost operation using the second exhaust air circulation path and the second defrost operation using the second air supply air circulation path for condensation and freezing in the second heat exchange exhaust passage 21b and drying. By simultaneously or alternately, the initial condensation and icing are eliminated, and the dry and normal state is restored in a short time.

  When the heat exchange air operation during the first freezing is continued at a low temperature such that the outdoor temperature is less than 0 ° C., the first heat exchanger 3a is warmed by the cold first supply air flow 19a and the warm first exhaust flow 16a. In the first heat exchange exhaust passage 21a through which the water flows, condensation gradually forms and freezes. As the ice freezes, the heat exchange function gradually decreases, but the first and / or second indoor environment detection means 37a, 37b and the first and / or second outdoor temperature detection means 38a, 38b. Thus, before the original heat exchange air operation cannot be performed, the heat exchange air operation during icing and the defrost operation are switched.

  Next, as shown in FIG. 10b, the heat exchange ventilator 1 includes a second exhaust air flow 16b (solid arrow in the figure) and a second air supply air 19b (in the figure) in the second heat exchanger 3b. The second heat exchanger 3b performs the heat exchange operation during the second icing with the second exhaust flow 16b and the second air supply air 19b, and the first heat exchanger 3a. A first indoor air circulation flow 27a (dotted arrow in the figure) of the indoor air is ventilated, and the first heat exchanger 3a performs a first defrost operation using the first exhaust flow circulation path, The first defrosting operation using the first air supply air circulation path is performed simultaneously or alternately.

  Even if dew condensation or icing has occurred in the first heat exchange exhaust passage 21a by the operation of FIG. 10a, the first heat exchanger 3a has the first heat exchange exhaust in the first heat exchanger 3a. Condensation and freezing are melted and dried by the warm first indoor air circulation flow 27a flowing through the flow path 21a. In addition, the warm first indoor air circulation flow 27a flowing through the first heat exchange air flow path 22a promotes melting and drying of dew condensation and icing in the first heat exchange exhaust flow path 21a. The first defrost operation using the first exhaust air circulation path and the first defrost operation using the first air supply air circulation path for condensation and freezing of the first heat exchange exhaust passage 21a and drying. By simultaneously or alternately, the initial condensation and icing are eliminated, and the dry and normal state is restored in a short time.

  When the heat exchange air operation during the second freezing is continued at a low temperature such that the outdoor temperature is less than 0 ° C., the second heat exchanger 3b is warmed by the cold second supply air flow 19b and the second exhaust air flow 16b is warm. Condensation and icing gradually occur in the second heat exchange exhaust passage 21b through which the air flows. As the ice freezes, the heat exchange function gradually decreases, but the first and / or second indoor environment detection means 37a, 37b and the first and / or second outdoor temperature detection means 38a, 38b. Thus, before the original heat exchange air operation cannot be performed, the heat exchange air operation during icing and the defrost operation are switched.

  The first and second heat exchange exhaust passages can be operated even in the cold region where the outdoor temperature is extremely low by sequentially switching between the heat exchange air operation and the defrost operation shown in FIGS. 10a and 10b. The heat exchange air operation at the time of freezing can be continued without being affected by the condensation and freezing at 21a and 21b.

  FIG. 11 shows a normal heat exchange air operation of the heat exchange type ventilator 1 configured as described above, and will be described below.

  As shown in FIG. 11, the heat exchanging ventilator 1 includes a first exhaust flow 16a (solid arrow in the figure) and a first air supply air 19a (broken arrow in the figure) in the first heat exchanger 3a. ), The first heat exchanger 3a performs a normal heat exchange operation with the first exhaust flow 16a and the first supply air flow 19a, and the second heat exchanger 3b has a second heat exchange operation. The exhaust flow 16b (solid arrow in the figure) and the second supply airflow 19b (broken arrow in the figure) are ventilated, and the second heat exchanger 3b is connected to the second exhaust flow 16b and the second supply airflow 19b. The normal heat exchange air operation is performed.

  The air flow rates of the first and second exhaust streams 16a and 16b and the first and second supply airflows 19a and 19b to be passed through the first and second heat exchangers 3a and 3b in the normal heat exchange air operation are as follows. The first and second exhaust streams 16a and 16b and the first and second exhaust streams 16a and 16b are passed through the first and second heat exchangers 3a and 3b in the heat exchange air operation during the first and second freezing described above. It is set as the structure equal to the air volume of supply airflow 19a, 19b. For example, when the house requires a ventilation air volume of 100 m3 / h, the heat exchange type ventilation device 1 is configured so that the normal heat exchange air operation is such that the air volume of the first exhaust flow 16a passed through the first heat exchanger 3a is 50 m3 / h, the air flow rate of the first supply air flow 19 a is 50 m 3 / h, the air flow rate of the second exhaust flow 16 b to be passed through the second heat exchanger 3 b is 50 m 3 / h, and the air flow rate of the second supply air flow 19 b is 50 m3 / h. Further, the heat exchange type ventilation device 1 is configured such that the heat exchange air operation during freezing is performed when the first heat exchanger 3a is used, and the first exhaust flow 16a is passed through the first heat exchanger 3a. The air flow rate is 100 m 3 / h, the air flow rate of the first air supply air 19 a is 100 m 3 / h, and when the second heat exchanger 3 b is used, the second exhaust gas is passed through the second heat exchanger 3 b. The air volume of the flow 16b is 100 m3 / h, and the air volume of the second air supply air 19b is 100 m3 / h. With this configuration, the heat exchanging ventilator 1 recovers the necessary ventilation airflow for houses and buildings regardless of the region or time, such as in cold regions where the outdoor temperature is extremely low or when the outdoor temperature is high. You can get while.

  Further, the normal heat exchange air operation is such that the first and second exhaust streams 16a and 16b and the first and second supply airflows 19a and 19b are directed to the first and second heat exchangers 3a and 3b. It is configured to ventilate once. That is, the flow rate of the exhaust flow and the flow rate of the supply airflow that are ventilated through the heat exchange type ventilator 1 are the flow rate of the first exhaust flow 16a and the flow rate of the first supply airflow 19a that are passed through the first heat exchanger 3a. And the air volume of the second exhaust stream 16b to be passed through the second heat exchanger 3b and the air volume of the second air supply air 19b.

  The operation and effect of the heat exchange ventilator 1 configured as described above will be described below.

  The heat exchange ventilator 1 includes first and second main body boxes 2a and 2b, and the first and second main body boxes 2a and 2b include first and second heat exchangers 3a and 3b, First and second blowers 4a and 4b, first and second indoor exhaust ports 5a and 5b, first and second outdoor exhaust ports 6a and 6b, and first and second outdoor air supply ports 7a 7b, first and second indoor air inlets 8a, 8b, first and second reflux ports, first and second exhaust flow shielding means, and first and second air supply shields And first and second reflux shield means, the first and second heat exchangers 3a and 3b are connected to the first and second heat exchange exhaust passages 21a and 21b and the first and second heat exchangers. The supply air flow paths 22a and 22b are provided, and condensation and icing occur in the first and / or second heat exchange exhaust flow paths 21a and 21b. When the first heat exchanger 3a performs the heat exchange air operation during the first freezing, the second heat exchanger 3b performs the second defrost operation, and then the second heat exchanger 3b The heat exchange air operation during the second freezing is performed, the first heat exchanger 3a performs the first defrost operation, and the first and second heat exchangers 3a and 3b perform the first and second freezing operations. The heat exchange air operation and the first and second defrost operations are sequentially switched. When no condensation or icing occurs in the first and second heat exchange exhaust passages 21a and 21b, When the heat exchanger 3a, 3b is used to perform normal heat exchange air operation and is operated in a cold region where the outdoor temperature is extremely low, the first and second heat exchange exhaust flows In order not to be affected by freezing in the roads 21a and 21b, the original first and second The heat exchange air operation during freezing can be continued, and when the outdoor temperature is high, the normal heat exchange air operation is performed using the first and second heat exchangers 3a and 3b. High heat exchange efficiency can be obtained.

  The heat exchange ventilator 1 includes first and / or second detection means for detecting the influence of dew condensation and icing in the first and / or second heat exchange exhaust passages 21a and 21b. When dew condensation or icing occurs in the second heat exchange exhaust passages 21a and 21b, the heat exchange air operation during the first icing, the second defrost operation, and the heat exchange air operation during the second icing And the first defrost operation are switched, and when dew condensation or icing does not occur in the first and second heat exchange exhaust passages 21a and 21b, the operation control is performed to perform the normal heat exchange operation. 1st and / or 2nd heat exchanger by the 1st and / or 2nd detection means which detects the influence of dew condensation and freezing in the 1st and / or 2nd heat exchange exhaust flow paths 21a and 21b Freeze the inside of 3a, 3b Even when operating in cold areas where the outdoor temperature is extremely low, the heat exchange air operation during the original first and second freezing can be continued, and if the outdoor temperature is high, A high heat exchange efficiency can be obtained by performing a normal heat exchange air operation using the first and second heat exchangers 3a and 3b.

  Further, in the heat exchange type ventilator 1, the heat exchange air operation during the first and second icing is performed through the paths of the first and second indoor air circulation flows 27 a and 27 b in the first and second defrost operations. The first and second freezing shielding means shield the heat exchange air operation during the first and second icing, and the first and second defrosting operations are the heat during the first and second icing. The first and second exhaust flow paths 17a and 17b and the first and second supply air flow paths 20a and 20b in the exchange air operation are connected to the first and second exhaust flow shielding means and the first and second supply air supplies. The first and second defrost operations are performed while being shielded by the air flow shielding means, and the normal heat exchange air operation is performed in the first and second defrost operation indoor air circulation flows 27a and 27b through the first and second routes. Shielding with the second reflux shielding means and performing normal heat exchange air operation The first and second recirculation shielding means, the first and second exhaust flow shielding means, and the first and second air supply shielding means make the outdoor temperature extremely low. When operating in a cold region, the first and second freezing heat exchange air operation and the first and second defrost operations are simultaneously and sequentially performed on the first and second heat exchangers 3a and 3b. The heat exchange air operation at the time of the original first and second freezing can be continued, and when the outdoor temperature is high, the first and second heat exchangers 3a and 3b Thus, it is possible to switch to normal heat exchange air operation, and to obtain high heat exchange efficiency.

  The heat exchange ventilator 1 is configured to perform the first and second defrost operations using the first and second indoor air circulation flows 27a and 27b of the indoor air. The air supply can be easily balanced, and the first and second defrost operations can reduce energy loss by returning the energy of room air to the room.

  Further, the heat exchange type ventilator 1 is configured such that the first and second defrost operations use the first and second exhaust flow circulation paths, and the first and second exhaust flow circulation paths are provided. By the first and second defrosting operations used, the dew condensation and freezing in the first and / or second heat exchange exhaust passages 21a and 21b are melted and dried, so that the heat during the first and second freezing is obtained. Exchange air operation can be continued for a long time without any problems.

  Further, the heat exchange type ventilator 1 has a configuration in which the first and second defrost operations use the first and second supply air circulation paths, and the first and / or second heat exchange exhausts. The 1st and 2nd which used the 1st and 2nd heat supply air flow circulation path which passes the 1st and 2nd heat exchange air supply flow paths 22a and 22b for the condensation and freezing of the condensation in the flow paths 21a and 21b, and drying. Can be promoted by defrosting. Further, since the first and second heat exchange air flow paths 22a and 22b do not cause condensation or icing, the first and second indoor air circulation flows 27a and 27b are the first and second heat exchange air flow paths. The air can be easily ventilated in 22a and 22b, and condensation and melting and drying of freezing in the first and / or second heat exchange exhaust passages 21a and 21b can be further promoted.

  Further, the heat exchange ventilator 1 has a configuration in which the first and second exhaust flow circulation paths and the first and second supply air circulation paths are used simultaneously or alternately in the first and second defrost operations. The first and / or second defrost operation using the first and second exhaust flow circulation paths melts the dew condensation and icing in the first and / or second heat exchange exhaust passages 21a and 21b. The first and / or second heat exchange exhaust passages 21a and 21b are further dried and condensed and dried, and the first and second heat exchange air passages 22a and 22b pass through the first. And the first and second defrosting operations using the second air supply circulation path, and the first and second heat exchange air flow paths 22a and 22b do not cause condensation or icing. First and second room air The recirculations 27a and 27b can be easily ventilated in the first and second heat exchange air flow paths 22a and 22b, and dew condensation and icing can occur in the first and / or second heat exchange exhaust flow paths 21a and 21b. Melting and drying can be further promoted, and the effects of dew condensation and icing on the first and / or second heat exchange exhaust passages 21a and 21b can be recovered in a short time.

  Further, the heat exchange type ventilator 1 is configured such that the first and second defrost operations use the first and second supply air flow circulation paths, and the first and / or second heat exchanges. The condensation and freezing of the exhaust passages 21a and 21b and the melting and drying can be achieved by the first and second defrost operations using the first and second feed airflow circulation paths of one flow.

  Further, in the heat exchange ventilator 1, in the first and second exhaust flow circulation paths, the first and second return ports are the first and second exhaust return ports 29a and 29b, and the first and second Two exhaust recirculation ports 29a and 29b are provided on the downstream side of the first and second heat exchange exhaust passages 21a and 21b, and the first and second recirculation shield means are the first and second exhaust recirculation shield dampers 30a. 30b, and the first and second exhaust gas recirculation shielding dampers 30a and 30b shield and open the first and second exhaust air circulation paths of the first and second indoor air circulation flows 27a and 27b. The first and second exhaust gas recirculation shield dampers 30a and 30b are shielded during the first and second freezing heat exchange operation and the normal heat exchange operation, and the first and second First exhaust using two exhaust flow circulation paths When the second defrosting operation is performed, the first and second exhaust recirculation shielding dampers 30a and 30b are opened, and the first and second indoor air circulation flows 27a and 27b are The heat exchange exhaust passages 21a and 21b are arranged so as to pass through the first and second exhaust recirculation ports 29a and 29b and return to the room. Switching between the heat exchange air operation during freezing, the heat exchange air operation during normal operation, and the first and second defrost operations, and by switching the damper, the first and second indoor air circulation flows 27a and 27b First and / or second heat exchange exhaust flow paths are formed by first and second defrost operations using first and second exhaust flow circulation paths that form first and second exhaust flow circulation paths. 21a, 21 The condensation and icing melting, drying can be continued long without hindrance heat exchange ventilation is performed when the first and second freezing.

  Further, in the heat exchange ventilator 1, in the first and second supply air circulation paths, the first and second return ports are the first and second supply air return ports 32a and 32b. The second air supply recirculation ports 32a and 32b are provided on the upstream side of the first and second heat exchange air flow paths 22a and 22b, and the first and second recirculation shielding means are the first and second air supply recirculations. The first and second supply air recirculation shield dampers 33a and 33b are shielding dampers 33a and 33b for shielding the first and second supply air circulation paths of the first and second indoor air circulation flows 27a and 27b. When the first and second freezing heat exchange air operation and the normal heat exchange air operation are performed, the first and second supply air reflux shielding dampers 33a and 33b are shielded. The first and second air supply circulation paths When the second defrosting operation is performed, the first and second supply air recirculation shield dampers 33a and 33b are opened, and the first and second indoor air circulation flows 27a and 27b are The first and second heat exchange air flow passages 22a and 22b pass through the second supply air recirculation ports 32a and 32b and flow into the upstream side of the first and second heat exchange air flow passages 22a and 22b. The first and second indoor air circulation flows 27a and 27b are switched by switching the heat exchange air operation during freezing, the heat exchange air operation during normal time, and the first and second defrost operations. The first and second heat supply air circulation paths are formed, and the first and / or second heat exchange exhaust passages 21a and 21b are used for the condensation and freezing of the first and second heat exchange. Through the air channels 22a and 22b First and second charge air flow circulation path to can be accelerated by the first and second defrosting operation using.

  Further, in the heat exchange type ventilator 1, the first and second recirculation openings are the first and second recirculation openings 35a and 35b in the first and second replenishment circulation paths, Provided between the downstream side of the first and second heat exchange exhaust passages 21a, 21b and the upstream side of the first and second heat exchange supply passages 22a, 22b. First and second supply air return shield dampers 36a, 36b, and the first and second supply air return shield dampers 36a, 36b are the first of the first and second indoor air circulation flows 27a, 27b. When the heat exchange air operation during the first and second freezing operations and the normal heat exchange air operation are performed, the first and second heat exchange air circulation routes are shielded and opened. Supply and return air dampers 36a and 36b are shielded to provide first and second supply When the first and second defrost operations using the air flow circulation path are performed, the first and second feed air reflux shield dampers 36a and 36b are opened, and the first and second indoor air circulations are performed. The streams 27a and 27b pass from the downstream side of the first and second heat exchange exhaust passages 21a and 21b through the first and second feed air reflux ports 35a and 35b, and the first and second heat exchanges. It is configured to flow into the upstream side of the air supply passages 22a and 22b. By switching the damper, the first and second freezing heat exchange air operation, the normal heat exchange air operation, The first and second indoor air circulation flows 27a, 27b are formed by switching the damper and the second defrosting operation, and the first and / or second air circulation flow paths are formed by switching the dampers. Second heat exchange exhaust passage 2 a, melting of condensation and freezing in 21b, the first and second sheet 俳気 flow circulation path of the one flow drying can be accomplished in the first and second defrosting operation using.

  Further, in the heat exchange type ventilator 1, the first and second exhaust gas recirculation shield dampers 30a and 30b are shielded from the first and second exhaust gas recirculation ports 29a and 29b in the first and second exhaust gas circulation paths. The first and second exhaust gas recirculation ports 29a and 29b are shielded and opened by the first and second exhaust gas recirculation shield dampers 30a and 30b, thereby providing the first and second exhaust gas recirculation ports 29a and 29b. And the second exhaust flow circulation path can be easily shielded and opened, so that the first and second freezing heat exchange air operation, the normal heat exchange air operation, and the first and second defrost operation Can be easily switched.

  Further, in the heat exchange type ventilator 1, the first and second supply air circulation shielding dampers 33a and 33b are provided in the first and second supply air circulation paths, and the first and second supply air circulation ports 32a and 32b. The first and second supply air recirculation openings 32a and 32b are shielded and opened by the first and second supply air recirculation shielding dampers 33a and 33b. Thus, the first and second supply air circulation paths can be easily shielded and opened, so that the first and second freezing heat exchange operation, the normal heat exchange air operation, the first and second heat exchange air operation, The second defrosting operation can be easily switched.

  Further, the heat exchange type ventilator 1 is configured so that the first and second supply air recirculation shield dampers 36a and 36b are the first and second supply and exhaust recirculation openings 35a in the first and second supply air flow circulation paths. , 35b is shielded and opened, and the first and second supply / exhaust recirculation openings 35a, 35b are shielded and opened by the first and second supply / exhaust recirculation shield dampers 36a, 36b. By doing so, the first and second supply / exhaust flow circulation paths can be easily shielded and opened, so that the first and second freezing heat exchange operation, the normal heat exchange operation, The first and second defrost operations can be easily switched.

  Further, when the heat exchange type ventilation device 1 is performing the heat exchange air operation during the first and second freezing and the heat exchange air operation during the normal time, the first and second exhaust flow shielding means are the first and second exhaust flow shielding means. The first and second exhaust flow paths 17a, 17b are opened, and the first and second supply air flow shielding means open the first and second supply air paths 20a, 20b, and the first and second supply flow shielding means are opened. When the defrosting operation is performed, the first and second exhaust flows 16a and 16b have the first and second exhaust flows 16a and 16b in the case where the indoor air is located upstream of the first and second heat exchange exhaust passages 21a and 21b. The second exhaust flow shielding means shields at least the first and second heat exchange exhaust flow paths 21a, 21b downstream of the first and second exhaust flow paths 17a, 17b, In the air supply air 19a, 19b, the outdoor air is exchanged with the first and second heat exchangers. In the case of the upstream side of the air flow paths 22a and 22b, the first and second supply air flow shielding means are at least upstream of the heat exchange air supply flow paths 22a and 22b of the first and second supply air flow paths 20a and 20b. The first and second exhaust flow shielding means and the first and second supply air flow shielding means are used to operate in a cold area where the outdoor temperature is extremely low. And the second heat exchangers 3a and 3b can be switched simultaneously and sequentially between the heat exchange air operation during the first and second icing and the first and second defrost operations. When the outdoor temperature is high, the first and second heat exchangers 3a and 3b can be operated in the normal heat exchange operation. High heat exchange efficiency Rukoto can. The first and second exhaust flow shielding means shield at least the first and second heat exchange exhaust flow paths 21a, 21b downstream of the first and second exhaust flow paths 17a, 17b, The first and second supply airflow shielding means shields at least the upstream side of the heat exchange airflow passages 22a and 22b of the first and second supply airflow paths 20a and 20b, so that the outdoor temperature is extremely low. When the first and second defrost operations are performed in a cold district, the first and second heat exchangers 3a and 3b do not come into contact with the extremely low outdoor air, and suppress the influence of condensation and freezing. be able to.

  Further, in the heat exchange ventilator 1, the first and second exhaust flow shielding means are the first and second outdoor exhaust port shielding dampers 24a and 24b in the first and second exhaust flow paths 17a and 17b. The first and second outdoor exhaust shielding shields 24a and 24b shield and open the downstream side of the first and second heat exchange exhaust passages 21a and 21b, and provide the first and second supply air. In the air flow paths 20a and 20b, the first and second air supply shielding means are the first and second outdoor air supply shielding shields 25a and 25b, and the first and second outdoor air supply shielding shields 25a. 25b shields and opens the upstream side of the first and second heat exchange air flow paths 22a and 22b, and performs the heat exchange air operation during the first and second icing and the heat exchange air operation during the normal time. When you are going, first and The two outdoor exhaust port shielding dampers 24a and 24b and the first and second outdoor air supply port shielding dampers 25a and 25b are opened, and the first and second defrost operations are performed. The outdoor exhaust port shielding dampers 24a and 24b and the first and second outdoor air supply port shielding dampers 25a and 25b are configured to shield each other. By switching and switching the first and second outdoor air inlet shielding dampers 25a and 25b, the first and second heat exchange air operation during freezing, the normal heat exchange air operation, the first and second The first and second outdoor exhaust port shielding dampers 24a and 24b shield the downstream sides of the first and second heat exchange exhaust passages 21a and 21b, and The two outdoor air inlet shielding dampers 25a and 25b shield the first and second heat exchange air flow paths 22a and 22b in the cold district where the outdoor temperature is extremely low by shielding the upstream side of the first and second heat exchange air flow paths 22a and 22b. When the defrosting operation is performed, the first and second heat exchangers 3a and 3b do not come into contact with the extremely low outside air outside the room, and can suppress the influence of condensation and icing.

  In the heat exchange type ventilator 1, the first and second exhaust flow shielding means are the first and second indoor exhaust port shielding dampers 23a and 23b in the first and second exhaust flow paths 17a and 17b. The first and second indoor exhaust port shielding dampers 23a, 23b shield and open the upstream side of the first and second heat exchange exhaust passages 21a, 21b, and the first and second supply air In the air flow paths 20a and 20b, the first and second air supply shielding means are the first and second indoor air inlet shielding dampers 26a and 26b, and the first and second indoor air inlet shielding dampers 26a. , 26b shield and open the downstream side of the first and second heat exchange air flow paths 22a, 22b, and perform the heat exchange air operation during the first and second icing and the heat exchange air operation during the normal time. When you go first and The two indoor exhaust port shielding dampers 23a and 23b and the first and second indoor air supply port shielding dampers 26a and 26b are opened, and the first and second defrosts using the first and second exhaust flow circulation paths are opened. When operating, the first and second indoor air outlet shielding dampers 23a and 23b are opened, and the first and second indoor air inlet shielding dampers 26a and 26b are shielded or opened. The first and second indoor exhaust port shielding dampers 23a and 23b and the first and second indoor air supply port shielding dampers 26a and 26b are switched, so that heat at the time of first and second freezing is obtained. Switching between the exchange air operation, the normal heat exchange air operation, and the first and second defrost operations, and the first and second defrost operations using the first and second exhaust flow circulation paths If done, it is possible to improve the first and second indoor air inlet shielding damper 26a, when shield 26b, path 20a of the air intake which is performing defrosting operation, the air-tightness of 20b.

  Further, when the first and second defrost operations using the first and second air supply circulation paths are performed, the heat exchange type ventilator 1 performs the first and second indoor exhaust port shielding dampers 23a. , 23b are shielded or opened, and the first and second indoor air inlet shielding dampers 26a, 26b are opened, and the first and second indoor exhaust outlet shielding dampers 23a, 23b can be switched. By switching the first and second indoor air inlet shielding dampers 26a and 26b, the heat exchange air operation during the first and second icing, the heat exchange air operation during the normal time, the first and second When the defrost operation is switched and the first and second defrost operations using the first and second air supply circulation paths are performed, the first and second indoor exhaust port shielding dampers 23a and 23b are shielded. The When, it is possible to improve the path 17a, 17b of the air-tightness of the exhaust stream is performing defrosting operation.

  Further, the heat exchange type ventilator 1 performs the first and second indoor exhaust port shielding dampers when performing the first and second defrost operations using the first and second supply air flow circulation paths. 23a, 23b and the first and second indoor air inlet shielding dampers 26a, 26b are configured to be opened, and switching between the first and second indoor air outlet shielding dampers 23a, 23b, By switching the second indoor air inlet shielding dampers 26a and 26b, the heat exchange air operation during the first and second icing, the heat exchange air operation during the normal time, and the first and second defrost operations are switched. be able to.

  Further, in the heat exchange type ventilator 1, in the first and second exhaust flows 16a and 16b, the first and second indoor exhaust port shielding dampers 23a and 23b are used as the first and second indoor exhaust ports 5a and 5b. The first and second outdoor exhaust port shielding dampers 24a and 24b shield and open the first and second outdoor exhaust ports 6a and 6b, and the first and second air supply air flow 19a. 19b, the first and second outdoor air inlet shielding dampers 25a and 25b shield and open the first and second outdoor air inlets 7a and 7b, and the first and second indoor air inlets. The shielding dampers 26a and 26b are configured to shield and open the first and second indoor air supply ports 8a and 8b. The first and second indoor exhaust ports 5a and 5b, Nino outdoor vent 6a 6b, the first and second outdoor air inlets 7a, 7b, and the first and second indoor air inlets 8a, 8b are shielded and opened by switching the dampers, so that the first and second Since the two exhaust flow paths 17a, 17b and the first and second supply air flow paths 20a, 20b can be easily shielded and opened, the heat exchange air operation during the first and second freezing and the normal time The heat exchange air operation and the first and second defrost operations can be easily switched.

  In the heat exchange ventilator 1, the first and second blowers 4a and 4b include first and second exhaust blades 15a and 15b and first and second air supply blades 18a and 18b. And the second exhaust blades 15a and 15b are configured to pass the first and second exhaust flow paths 17a and 17b when the first and second freezing heat exchange air operation and the normal heat exchange air operation are performed. When the first and second defrost operations are performed, the first and second exhaust air circulation paths of the first and second indoor air circulation flows 27a and 27b are blown and the first and second supply air flows. The air blades 18a and 18b blow the first and second air supply paths 20a and 20b when performing the heat exchange air operation during the first and second freezing operations and the heat exchange air operation during the normal time. When performing the first and second defrost operations, the first and second chambers The first and second supply air circulation paths of the air circulation flows 27a and 27b are blown, and the first and second exhaust blades 15a and 15b and / or the first and second supply blades 18a and 18b are When the first and second defrost operations are performed, the first and second indoor air circulation flows 27a and 27b are configured to blow the first and second supply air flow circulation paths. Each of the second blowers 4a and 4b is a single blower, and can perform air exchange during heat exchange operation during freezing, heat exchange operation during normal operation, and defrost operation.

  In addition, the heat exchange type ventilator 1 includes the first and second exhaust streams 16a that allow the first and second heat exchangers 3a and 3b to ventilate in the heat exchange air operation during the first and second freezing. 16b and the first and second supply airflows 19a and 19b are used for the first and second exhaust flows 16a to be passed through the first and second heat exchangers 3a and 3b in the normal heat exchange operation. , 16b and the first and second supply airflows 19a, 19b have the same air volume, and the first and second exhaust flows 16a, 16b of the heat exchange air operation during the first and second freezing And the first and second supply airflows 19a and 19b, and the first and second exhaust airflows 16a and 16b and the first and second supply airflows 19a and 19b in normal heat exchange operation. By making them equal, the outdoor temperature will be very low. Such as when cold climates and outdoor temperature is high, regardless of the region or when to use a heat exchange type ventilation device 1, the ventilation air volume required, such as in a house or building can be obtained with heat recovery.

  Further, in the heat exchange ventilator 1, in the normal heat exchange air operation, the first and second exhaust streams 16 a and 16 b and the first and second supply air streams 19 a and 19 b are the first and second heats. The exchangers 3a and 3b are configured to be once ventilated, and the first and second exhaust streams 16a and 16b and the first and second supply air streams 19a and 19b are provided with first and second heats. When ventilation is performed in series with respect to the exchangers 3a and 3b, the ventilation resistance by the first and second heat exchangers 3a and 3b increases every time the first heat exchanger 3a and the second heat exchanger 3b are passed. Therefore, the first and second blowers 4a and 4b are increased in size and power consumption is increased, but the first and second exhaust flows 16a and 16b and the first and second supply air flows 19a and 19b are Once in parallel to the first and second heat exchangers 3a, 3b By doing so, the first and second exhaust streams 16a, 16b and the first and second supply airflows 19a, 19b are distributed and passed through the first and second heat exchangers 3a, 3b. By reducing the wind speed passing through the first and second heat exchangers 3a and 3b, it is possible to achieve both reduction in ventilation resistance and improvement in heat exchange efficiency of the first and second heat exchangers 3a and 3b. .

  The heat exchange type ventilator according to the present invention can continue the original heat exchange ventilation even when the outdoor temperature is extremely low, and is useful as a ventilator for heat exchange ventilation in a cold region in winter. .

Sectional drawing which shows the heat exchange type | mold ventilation apparatus of Embodiment 1 of this invention Sectional drawing which shows heat exchange air operation of the first main body box Sectional drawing which shows the 1st defrost driving | operation using the 1st exhaust flow circulation path of the same 1st main body box Sectional drawing which shows the 1st defrost driving | operation using the 1st air supply circulation path of the 1st main body box Sectional drawing which shows the 1st defrost driving | operation using the 1st air supply / exhaust flow circulation path of the said 1st main body box Sectional drawing which shows the 1st defrost operation | movement using the 1st exhaust flow circulation path and the 1st supply air flow circulation path of the said 1st main body box. (A) Schematic sectional view showing the defrost operation using the exhaust flow circulation path of the heat exchange type ventilator and the heat exchange air operation during freezing, (b) Using the exhaust flow circulation path of the heat exchange type ventilator Schematic cross-sectional view showing heat exchange air operation during defrosting and freezing (A) Schematic sectional view showing the defrosting operation using the air supply circulation path of the heat exchange type ventilator and the heat exchange air operation during freezing, (b) Using the air supply circulation path of the heat exchange type ventilation apparatus Schematic cross-sectional view showing heat exchange air operation during defrosting and freezing (A) Schematic sectional view showing the defrost operation using the supply / exhaust flow circulation path of the heat exchange type ventilator and the heat exchange air operation during freezing, (b) The supply / exhaust flow circulation path of the heat exchange type ventilator Schematic cross section showing the defrost operation used and heat exchange air operation during freezing (A) Schematic sectional view showing the defrost operation using the exhaust flow circulation path and the supply air circulation path of the heat exchange type ventilator and the heat exchange air operation during freezing, (b) Exhaust flow of the heat exchange type ventilator Schematic sectional view showing defrosting operation using circulation path and supply air circulation path and heat exchange air operation during freezing Schematic cross-sectional view showing normal heat exchange air operation of the heat exchange ventilator Sectional view showing a conventional heat exchanger unit

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Heat exchange type ventilator 2a 1st main body box 2b 2nd main body box 3a 1st heat exchanger 3b 2nd heat exchanger 4a 1st air blower 4b 2nd air blower 5a 1st indoor exhaust port 5b Second indoor exhaust port 6a First outdoor exhaust port 6b Second outdoor exhaust port 7a First outdoor air supply port 7b Second outdoor air supply port 8a First indoor air supply port 8b Second indoor air supply Air port 14a First motor 14b Second motor 15a First exhaust blade 15b Second exhaust blade 16a First exhaust flow 16b Second exhaust flow 17a First exhaust flow path 17b Second exhaust flow Path 18a first air supply blade 18b second air supply blade 19a first air supply air 19b second air supply air 20a first air supply air path 20b second air supply air path 21a first heat exchange Exhaust flow path 21b Second heat exchange exhaust flow path 22a First heat Supply air flow path 22b Second heat exchange air supply flow path 23a First indoor exhaust port shielding damper 23b Second indoor exhaust port shielding damper 24a First outdoor exhaust port shielding damper 24b Second outdoor exhaust port shielding damper 25a First One outdoor air inlet shielding damper 25b Second outdoor air inlet shielding damper 26a First indoor air inlet shielding damper 26b Second indoor air inlet shielding damper 27a First indoor air circulation flow 27b Second Indoor air circulation flow 29a First exhaust gas recirculation port 29b Second exhaust gas recirculation port 30a First exhaust gas recirculation shielding damper 30b Second exhaust gas recirculation shielding damper 32a First air supply recirculation port 32b Second air supply recirculation port 33a First supply / air recirculation shield damper 33b Second supply / air recirculation shield damper 35a First supply / exhaust recirculation port 35b Second supply / exhaust recirculation port 36a First supply / discharge Air recirculation shielding damper 36b Second air supply / exhaust recirculation shielding damper 37a First indoor environment detection means 37b Second indoor environment detection means 38a First outdoor temperature detection means 38b Second outdoor temperature detection means

Claims (24)

A heat exchange type equipped with a heat exchanger for exchanging heat between the exhaust flow and the supply air flow by passing an exhaust flow for exhausting the indoor air to the outside and a supply air flow for supplying the outdoor air to the room A ventilation device comprising a plurality of the heat exchangers, the heat exchanger comprising a heat exchange exhaust passage and a heat exchange air passage for allowing the exhaust flow and the supply air flow to pass, and dew condensation in the heat exchange exhaust passage When heat or icing occurs, one heat exchanger performs heat exchange air operation during icing, and one of the other heat exchangers performs defrost operation to eliminate condensation or icing in the heat exchange exhaust passage. A plurality of the heat exchangers are configured to sequentially switch between the heat exchange air operation and the defrost operation at the time of freezing in the plurality of heat exchangers, and when the condensation or icing does not occur in the heat exchange exhaust passage. The heat exchange air operation during normal operation using Heat exchange type ventilator to. The heat exchange ventilator includes a first main body box and a second main body box, and the first main body box includes a first heat exchanger, a first blower, and a first indoor exhaust port. The first outdoor exhaust port, the first outdoor air supply port, the first indoor air supply port, the first reflux port, the first exhaust flow shielding means, and the first supply air flow shielding means And a first reflux shield means, the first heat exchanger includes a first heat exchange exhaust flow path and a first heat exchange air supply flow path, and the first blower is a first exhaust flow And a first supply air flow and a first indoor air circulation flow, wherein the first indoor exhaust port is an inlet of the first exhaust flow to the first main body box, and One outdoor exhaust port is a discharge port for the first exhaust flow from the first main body box, and the first outdoor air supply port is a flow of the first supply air flow to the first main body box. The first indoor supply The outlet is an outlet for the first air supply from the first main body box, and the first reflux port is an inlet or an outlet for the first indoor air circulation flow during the defrost operation, The first exhaust flow shielding means shields and opens the first exhaust flow path, the first supply air flow shielding means shields and opens the first supply air flow path, and One reflux shielding means shields and opens the first indoor air circulation flow, and the second main body box includes a second heat exchanger, a second blower, and a second indoor exhaust port. The second outdoor exhaust port, the second outdoor air supply port, the second indoor air supply port, the second return port, the second exhaust flow shielding means, and the second supply air flow shielding means. And a second reflux shield means, the second heat exchanger comprises a second heat exchange exhaust flow path and a second heat exchange air supply flow path, and the second blower The second exhaust air flow, the second air supply air flow, and the second indoor air circulation flow, and the second indoor exhaust port is an inlet of the second exhaust flow to the second main body box. The second outdoor exhaust port is a discharge port for the second exhaust flow from the second main body box, and the second outdoor air supply port is the second main body box for the second air supply airflow. The second indoor air supply port is a discharge port for the second air supply air from the second main body box, and the second reflux port is the second air supply port during defrost operation. The second exhaust flow shielding means shields and opens the second exhaust flow path, and the second supply air flow shielding means is the second air flow shielding means. The second recirculation shielding means shields and opens the second indoor air circulation flow, and the first and / or the second recirculation flow shielding means. Alternatively, when condensation or icing occurs in the second heat exchange exhaust flow path, the first heat exchanger performs heat exchange air operation during icing, the second heat exchanger performs defrost operation, and then Heat exchange air operation during icing in the first and second heat exchangers such that the second heat exchanger performs heat exchange air operation during icing, and the first heat exchanger performs defrost operation. The first and second heat exchangers perform normal heat exchange air operation when no condensation or icing occurs in the first and second heat exchange exhaust passages. A heat exchange type ventilator characterized by having a configuration. The first and / or second body box includes first and / or second detection means for detecting the influence of dew condensation and icing in the first and / or second heat exchange exhaust flow path, When condensation or icing occurs in the second heat exchange exhaust flow path, switch between heat exchange air operation and defrost operation during icing, and condensation and icing occur in the first and second heat exchange exhaust flow paths. 3. The heat exchange type ventilator according to claim 2, wherein operation control is performed to perform normal heat exchange air operation when there is not. The heat exchange air operation during freezing is performed by shielding the first and second indoor air circulation paths of the defrost operation with the first and second reflux shielding means and performing the heat exchange air operation during freezing. In the operation, the first and second exhaust flow paths and the first and second supply air flow paths of the heat exchange air operation during freezing are connected to the first and second exhaust flow shielding means and the first and second exhaust flow shielding means. The defrost operation is performed by shielding with the air supply shielding means, and the normal heat exchange operation is performed by shielding the indoor air circulation path of the defrost operation with the first and second reflux shielding means. The heat exchange type ventilator according to claim 2, wherein the heat exchange air operation is performed. The heat exchange type ventilator according to claim 4, wherein the defrosting operation is performed using indoor air. In the first and second exhaust flows, when the indoor air is located upstream of the first and second heat exchange exhaust passages, the first and second indoor air circulation flows are First and second air that passes room air from the upstream side of the heat exchange exhaust passage to the first and second heat exchangers and returns to the room from the downstream side of the first and second heat exchange exhaust passages. 6. The heat exchange type ventilator according to claim 5, wherein an exhaust flow circulation path is formed, and the first and second exhaust flow circulation paths are used for defrost operation. When the outdoor air is the upstream side of the first and second heat exchange air flow paths in the first and second supply airflows, the first and second indoor air circulation flows are First and second air that passes room air from the upstream side of the heat exchange air flow path to the first and second heat exchangers and returns to the room from the downstream side of the first and second heat exchange air flow paths 6. The heat exchange type ventilator according to claim 5, wherein a supply air circulation path is formed, and the first and second supply air circulation paths are used for defrost operation. 8. The heat exchange type ventilator according to claim 6, wherein the defrosting operation uses the first and second exhaust flow circulation paths and the first and second supply air circulation paths simultaneously or alternately. In the first and second exhaust flows, the indoor air is set to the upstream side of the first and second heat exchange exhaust flow paths, and the outdoor air is set in the first and second supply airflows to the first and second heat exchange flows. In the case of the upstream side of the supply air flow path, the first and second indoor air circulation flows are transferred from the upstream side of the first and second heat exchange exhaust flow paths to the first and second heat exchangers. And then circulates from the downstream side of the first and second heat exchange exhaust passages to the upstream side of the first and second heat exchange supply passages, and further to the first and second heat exchange passages. First and second supply airflows that pass through the first and second heat exchangers from the upstream side of the supply air flow path and return to the room from the downstream sides of the first and second heat supply air supply paths 6. The circulation path is formed, and the defrost operation uses the first and second supply airflow circulation paths. Exchange type ventilation system of the heat. In the first and second exhaust flow circulation paths, the first and second return ports are first and second exhaust return ports, and the first and second exhaust return ports are the first and second exhaust return ports. Provided on the downstream side of the heat exchange exhaust passage, the first and second reflux shield means are first and second exhaust reflux shield dampers, and the first and second exhaust reflux shield dampers are the first and second exhaust reflux shield dampers, The first and second exhaust flow circulation paths of the second indoor air circulation flow are shielded and opened, and when the heat exchange air operation during freezing and the heat exchange air operation during normal operation are performed, the first The first and second exhaust gas recirculation shield dampers are shielded, and the first and second exhaust gas recirculation shield dampers are opened when the defrost operation is performed using the first and second exhaust gas circulation paths. The first and second indoor air circulation flows are The heat exchange ventilator according to claim 6 or 8, wherein the heat exchange type ventilator is configured to pass through the first and second exhaust gas recirculation ports from the downstream side of the second heat exchange exhaust passage and return to the room. . In the first and second supply air circulation paths, the first and second return ports are first and second supply air return ports, and the first and second supply air return ports are the first and second supply air return ports. Provided on the upstream side of the second heat exchange air flow path, the first and second recirculation shielding means are first and second air recirculation shielding dampers, and the first and second air recirculation shielding dampers are When the first and second supply air circulation paths of the first and second indoor air circulation flows are shielded and opened, and heat exchange air operation during freezing and normal heat exchange air operation are performed The first and second supply air recirculation shield dampers are shielded, and when the defrost operation using the first and second supply air circulation paths is performed, the first and second supply air The reflux shield damper is opened, and the first and second indoor air circulation flows are 9. The heat exchange type ventilator according to claim 7, wherein the heat exchange type ventilator is configured to pass through the second air supply recirculation port and flow into the upstream side of the first and second heat exchange air flow paths. . In the first and second supply air flow circulation paths, the first and second return openings are the first and second supply air return openings, downstream of the first and second heat exchange exhaust passages. Between the first and second heat exchange air flow passages, and the first and second reflux shield means are first and second feed air reflux shield dampers, The second supply air recirculation shield damper shields and opens the first and second supply air flow circulation paths of the first and second indoor air circulation flows, and heat exchange air operation during freezing and normal operation When the heat exchange air operation is being performed, the first and second feed air reflux shield dampers are shielded, and the defrost operation is performed using the first and second feed air flow circulation paths. When the first and second supply air return shield dampers are open, the first and second The internal air circulation flow passes from the downstream side of the first and second heat exchange exhaust passages to the first and second feed air return ports and passes through the first and second heat exchange supply passages. The heat exchange type ventilator according to claim 9, wherein the heat exchange type ventilator is configured to flow into the upstream side of the heat exchanger. 11. The first and second exhaust recirculation shielding dampers in the first and second exhaust flow circulation paths are configured to shield and open the first and second exhaust recirculation openings. Heat exchange type ventilator. The first and second supply air circulation paths are configured to shield and open the first and second supply air recirculation openings in the first and second supply air circulation paths. The heat exchange ventilator according to 11. In the first and second supply air flow circulation paths, the first and second supply air return shield dampers are configured to shield and open the first and second supply / exhaust return openings. The heat exchange type ventilator according to claim 12. When performing heat exchange air operation during freezing and normal heat exchange air operation, the first and second exhaust flow shielding means open the first and second exhaust flow paths, The second supply air flow shielding means opens the first and second supply air flow paths, and when the defrost operation is performed, the first and second exhaust air flows cause the indoor air to flow through the first and second supply air flow shielding means. In the case of the upstream side of the heat exchange exhaust flow path, the first and second exhaust flow shielding means include at least the first and second heat exchange exhaust flow paths of the first and second exhaust flow paths. When the outdoor air is used as the upstream side of the first and second heat exchange air flow paths in the first and second supply airflows, the first and second supply airflow shielding means Shields at least the upstream side of the heat exchange air flow path of the first and second supply air flow paths. Heat exchange type ventilator according to claim 4, wherein a. In the first and second exhaust flow paths, the first and second exhaust flow shielding means are first and second outdoor exhaust shielding shields, and the first and second outdoor exhaust shielding shields are The first and second heat exchange exhaust passages are shielded and opened downstream, and in the first and second air supply paths, the first and second supply air shielding means are the first and second Two outdoor air inlet shielding dampers, wherein the first and second outdoor air inlet shielding dampers shield and open the upstream side of the first and second heat exchange air flow paths, When performing the heat exchange air operation and the normal heat exchange air operation, the first and second outdoor exhaust port shielding dampers and the first and second outdoor air supply port shielding dampers are opened, When performing defrost operation, the first and second chambers Outlet shielding damper and the first and second outdoor air inlet shielding damper heat exchange type ventilator according to claim 16, wherein it has a structure for shielding. In the first and second exhaust flow paths, the first and second exhaust flow shielding means are first and second indoor exhaust shielding shields, and the first and second indoor exhaust shielding shields are The first and second heat exchange exhaust passages are shielded and opened on the upstream side. In the first and second supply air flow paths, the first and second supply air shielding means are first and second. The first and second indoor air inlet shielding dampers shield and open the downstream side of the first and second heat exchange air flow paths, and heat during freezing. During the exchange air operation and the normal heat exchange air operation, the first and second indoor exhaust port shielding dampers and the first and second indoor air supply port shielding dampers are opened, and the first And defrost operation using the second exhaust flow circulation path 18 and 17, wherein the first and second indoor exhaust port shielding dampers are opened, and the first and second indoor air inlet shielding dampers are shielded or opened. The heat exchange ventilator described. When performing defrost operation using the first and second air supply air circulation paths, the first and second indoor air outlet shielding dampers are shielded or opened, and the first and second indoor air inlet shieldings are performed. 19. The heat exchange type ventilator according to claim 7, wherein the damper is configured to be opened. When performing defrost operation using the first and second supply air flow circulation paths, the first and second indoor exhaust shields and the first and second indoor exhaust shields are opened. The heat exchange type ventilator according to claim 9 or 18, characterized in that it is configured. In the first and second exhaust flows, the first and second indoor exhaust shielding dampers shield and open the first and second indoor exhausts, and the first and second outdoor exhaust shielding dampers The first and second outdoor air outlets are shielded and opened, and the first and second outdoor air inlet shielding dampers of the first and second outdoor air inlets are connected to the first and second outdoor air inlets. The shielding and opening are performed, and the first and second indoor air inlet shielding dampers are configured to shield and open the first and second indoor air inlets. The heat exchange type ventilator according to the above. The first and second blowers are provided with first and second exhaust blades and first and second air supply blades, and the first and second exhaust blades are used for heat exchange air operation during icing and normal operation. When the heat exchange air operation is performed, the first and second exhaust flow paths are blown, and when the defrost operation is performed, the first and second exhaust air circulation paths of the first and second indoor air circulation flows The first and second air supply blades blow the first and second air supply paths when performing the heat exchange air operation during freezing and the heat exchange air operation during normal operation, When the operation is performed, the first and second supply air circulation paths of the first and second indoor air circulation flows are blown, and the first and second exhaust blades and / or the first and second supply air circulation paths are blown. When the defrost operation is performed, the air vane is the first of the first and second indoor air circulation flows. Beauty second sheet 俳気 flow circulation path heat exchanger type ventilation system according to claim 8 and 9 wherein it has a structure for blowing. In the heat exchange air operation during icing, the air volumes of the first and second exhaust streams and the first and second supply airflows that are passed through the first and second heat exchangers are the same as in the normal heat exchange air operation. 3. The heat exchange type ventilator according to claim 2, wherein the first and second exhaust streams to be ventilated through the first and second heat exchangers are equal in air volume to the first and second supply airflows. The first and second exhaust flows and the first and second supply airflows are once ventilated to the first and second heat exchangers in normal heat exchange air operation. The heat exchange ventilator described.

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