Heat exchange-type ventilation device

Abstract

Provided is a heat exchange-type ventilation device ( 1 ) comprising: an air supply blower including an air supply motor; an exhaust blower including an exhaust motor; an air supply path ( 7 ) through which air is sent to a room from outside by the air supply blower: an exhaust path through which air is sent from the room to outside by the exhaust blower: a heat exchange element provided at a position at which the air supply path ( 7 ) and the exhaust path intersect, the heat exchange element being configured to exchange heat between room air and outside air at the time of ventilation; and a current detector configured to detect a current flowing through the air supply motor. Using a controller ( 11 ), the heat exchange-type ventilation device controls the number of revolutions of the air supply motor. The air supply path is connected to a circulating air path ( 14 ) of unitary air conditioning ( 13 ), and the controller ( 11 ) changes the opening area of an airflow rate adjustment damper ( 15 ) provided in the air supply path ( 7 ) so that a current value of the air supply motor, the current value being detected by the current detector, falls within a predetermined range of a target current value.

1 . A heat exchange-type ventilation device, comprising:
 an air supply blower including an air supply motor;   an exhaust blower including an exhaust motor;   an air supply path through which air is sent to a room from outside by the air supply blower:   an exhaust path through which air is sent from the room to outside by the exhaust blower:   a heat exchange element provided at a position at which the air supply path and the exhaust path intersect, the heat exchange element being configured to exchange heat between room air and outside air at a time of ventilation; and   a current detector configured to detect a current flowing through the air supply motor,   wherein a controller controls the number of revolutions of the air supply motor,   wherein the air supply path is connected to a circulating air path of unitary air conditioning, and   wherein the controller changes an opening area of an airflow rate adjustment damper provided in the air supply path so that a current value of the air supply motor, the current value being detected by the current detector, falls within a predetermined range of a target current value.   
     
     
         2 . The heat exchange-type ventilation device according to  claim 1 ,
 wherein, while exercising control so that the number of revolutions of the air supply motor is kept at a predetermined number of revolutions, the controller changes the opening area of the airflow rate adjustment damper so that the current value of the air supply motor falls within the predetermined range of the target current value.   
     
     
         3 . A heat exchange-type ventilation device, comprising:
 an air supply blower including an air supply motor;   an exhaust blower including an exhaust motor;   an air supply path through which air is sent to a room from outside by the air supply blower:   an exhaust path through which air is sent from the room to outside by the exhaust blower:   a heat exchange element provided at a position at which the air supply path and the exhaust path intersect, the heat exchange element being configured to exchange heat between room air and outside air at a time of ventilation; and   a current detector configured to detect a current flowing through the exhaust motor,   wherein a controller controls the number of revolutions of the exhaust motor,   wherein the exhaust path is connected to a circulating air path of unitary air conditioning, and   wherein the controller changes an opening area of an airflow rate adjustment damper provided in the exhaust path so that a current value of the exhaust motor, the current value being detected by the current detector, falls within a predetermined range of a target current value.   
     
     
         4 . The heat exchange-type ventilation device according to  claim 3 ,
 wherein, while exercising control so that the number of revolutions of the exhaust motor is kept at a predetermined number of revolutions, the controller changes the opening area of the airflow rate adjustment damper so that the current value of the exhaust motor falls within the predetermined range of the target current value.   
     
     
         5 . A heat exchange-type ventilation device, comprising:
 an air supply blower including an air supply motor;   an exhaust blower including an exhaust motor;   an air supply path through which air is sent to a room from outside by the air supply blower:   an exhaust path through which air is sent from the room to outside by the exhaust blower:   a heat exchange element provided at a position at which the air supply path and the exhaust path intersect, the heat exchange element being configured to exchange heat between room air and outside air at a time of ventilation; and   a supply airflow rate adjustment damper provided in the air supply path,   wherein a controller controls ON/OFF of the air supply blower, ON/OFF of the exhaust blower, and opening/closing of the supply airflow rate adjustment damper,   wherein the air supply path is directly connected to a circulating air path of unitary air conditioning,   wherein the exhaust path is directly connected to an indoor space except the circulating air path,   wherein a room temperature detector is provided in the exhaust path and upstream from the heat exchange element, and,   wherein the controller exercises control so that,
 when “the unitary air conditioning is ON” and “T i ≤T u −α 1  or T u +α 2 ≤T i ”, “the exhaust blower is OFF” and “the supply airflow rate adjustment damper is closed”, and 
 when “the unitary air conditioning is ON” and “T u −α 1 <T i <T u +α 2 ”, “the exhaust blower is ON” and “the supply airflow rate adjustment damper is opened”, 
 where T i  is a room temperature detected by the room temperature detector, T u  is a set temperature of the unitary air conditioning, and α 1  and α 2  are predetermined temperatures. 
   
     
     
         6 . The heat exchange-type ventilation device according to  claim 5 , wherein the controller exercises control so that, when “the unitary air conditioning is ON” and “T i ≤T u −α 1  or T u +α 2≤ T i ”, “the air supply blower is OFF”. 
     
     
         7 . The heat exchange-type ventilation device according to  claim 5 ,
 wherein, when the set temperature T u  of the unitary air conditioning is changed, the controller checks again whether “T u −α 1 <T i <T u +α 2 ” is satisfied,   wherein, when “the unitary air conditioning is ON” and “T i ≤T u −α 1  or T u +α 2 ≤T i ”, the controller exercises control so that “the exhaust blower is OFF” and “the supply airflow rate adjustment damper is closed”, and   wherein, when “the unitary air conditioning is ON” and “T u −α 1 <T i <T u +α 2 ”, the controller exercises control so that “the exhaust blower is ON” and “the supply airflow rate adjustment damper is opened”.   
     
     
         8 . A heat exchange-type ventilation device, comprising:
 an air supply blower including an air supply motor;   an exhaust blower including an exhaust motor;   an air supply path through which air is sent to a room from outside by the air supply blower:   an exhaust path through which air is sent from the room to outside by the exhaust blower:   a heat exchange element provided at a position at which the air supply path and the exhaust path intersect, the heat exchange element being configured to exchange heat between room air and outside air at a time of ventilation;   a supply airflow rate adjustment damper provided in the air supply path; and   an exhaust airflow rate adjustment damper provided in the exhaust path,   wherein a controller controls ON/OFF of the air supply blower, ON/OFF of the exhaust blower, opening/closing of the supply airflow rate adjustment damper, and opening/closing of the exhaust airflow rate adjustment damper,   wherein the air supply path is directly connected to a circulating air path of unitary air conditioning,   wherein the exhaust path is directly connected to the circulating air path,   wherein a room temperature detector is provided in the exhaust path and upstream from the heat exchange element, and   wherein the controller exercises control so that,
 when “the unitary air conditioning is ON” and “T i ≤T u −α 1  or T u +α 2 ≤T i ”, “the supply airflow rate adjustment damper is closed” and “the exhaust airflow rate adjustment damper is closed”, and 
 when “the unitary air conditioning is ON” and “T u −α 1 <T i <T u +α 2 ”, “the air supply blower is ON”, “the exhaust blower is ON”, “the supply airflow rate adjustment damper is opened”, and “the exhaust airflow rate adjustment damper is opened”, 
 where T i  is a room temperature detected by the room temperature detector, T u  is a set temperature of the unitary air conditioning, and α 1  and α 2  are predetermined temperatures. 
   
     
     
         9 . The heat exchange-type ventilation device according to  claim 8 ,
 wherein, when “the unitary air conditioning is ON” and “T i ≤T u −α 1  or T u +α 2 ≤T i ”, the controller exercises control so that “the air supply blower and the exhaust blower are OFF”.   
     
     
         10 . The heat exchange-type ventilation device according to  claim 8 ,
 wherein, when “the unitary air conditioning is ON” and “T i ≤T u  −α 1  or T u +α 2 ≤T i ”, the controller exercises control so that “the air supply blower or the exhaust blower is OFF”.   
     
     
         11 . The heat exchange-type ventilation device according to  claim 8 ,
 wherein, when the set temperature T u  of the unitary air conditioning is changed, the controller checks again whether “T u −α 1 <T i <T u +α 2 ” is satisfied, and   wherein, when “the unitary air conditioning is ON” and “T i ≤T u  −α 1  or T u +α 2 ≤T i ”, the controller exercises control so that “the supply airflow rate adjustment damper is closed” and “the exhaust airflow rate adjustment damper is closed”, and   wherein, when “the unitary air conditioning is ON” and “T u −α 1 <T i <T u +α 2 ”, the controller exercises control so that “the air supply blower is ON”, “the exhaust blower is ON”, “the supply airflow rate adjustment damper is opened”, and “the exhaust airflow rate adjustment damper is opened”.   
     
     
         12 . The heat exchange-type ventilation device according to  claim 8 , the device further comprising a casing configured to accommodate the air supply blower, the exhaust blower, and the heat exchange element,
 wherein the supply airflow rate adjustment damper is provided inside the casing.