Search

EP-4450889-B1 - VENTILATION SYSTEM

EP4450889B1EP 4450889 B1EP4450889 B1EP 4450889B1EP-4450889-B1

Inventors

  • MIYAZAKI, Takeru
  • YAMANOI, Yoshiki
  • IYOSHI, Yuta
  • SAEKI, KUMIKO
  • MATSUOKA, HIROMUNE
  • KOMATSU, AKIRA
  • TAKAHASHI, TAKASHI
  • ODO, TSUNAHIRO
  • TSURUZONO, Shota

Dates

Publication Date
20260506
Application Date
20221021

Claims (7)

  1. A ventilation system (1) comprising: a refrigerant circuit (60) that circulates refrigerant through a compressor (52), a first heat exchanger (12), and a second heat exchanger (32); a first air supply fan (22A) and a second air supply fan (22B) that supply outdoor air to an indoor space; an exhaust fan (42) that exhausts indoor air to an outdoor space; an air supply path that connects the outdoor space to the indoor space and has an interior in which the first heat exchanger (12) and the first air supply fan (22A) and second air supply fan (22B) located further toward an indoor side than the first heat exchanger (12) are adapted to be installed in a ceiling space of a target space; an exhaust air path that connects the outdoor space to the indoor space and has an interior in which the second heat exchanger (32) and the exhaust fan (42) are arranged; a first air supply detector (23A) for detecting a first supply airflow (AF1) blown out by the first air supply fan (22A); a second air supply detector (23B) for detecting a second supply airflow (AF2) blown out by the second air supply fan (22B); and a control unit (CU), wherein the compressor (52), the exhaust fan (42), and the second heat exchanger (32) are adapted to be installed outdoors or inside a wall of the target space, the control unit (CU) executes first air supply control to adjust a rotational speed of the first air supply fan (22A) so that the first supply airflow (AF1) becomes a target value (TV1), and second air supply control to adjust a rotational speed of the second air supply fan (22B) so that the second supply airflow (AF2) becomes a target value (TV2).
  2. The ventilation system (1) according to claim 1, further comprising a monitoring sensor (8oA, 80B) for detecting state information that is at least one of an indoor air state, presence or absence of people indoors, and number of people indoors, wherein the control unit (CU) determines the target value (TV1) of the first supply airflow and the target value (TV2) of the second supply airflow on a basis of a detection result of the monitoring sensor (8oA, 80B).
  3. The ventilation system (1) according to claim 1 or 2, further comprising an exhaust detector (43) for detecting an exhaust airflow (AF3) blown out by the exhaust fan (42), wherein the control unit (CU) executes exhaust control to adjust a rotational speed of the exhaust fan (42) so that the exhaust airflow (AF3) becomes a target value (TV3).
  4. The ventilation system (1) according to claim 3, wherein the control unit (CU) determines the target value (TV3) of the exhaust airflow and a controlled variable (CQ) for the refrigerant circuit (60) on a basis of the target value (TV1) of the first supply airflow and the target value (TV2) of the second supply airflow.
  5. The ventilation system (1) according to claim 4, wherein the control unit (CU) includes: a main controller (55) that determines the target value (TV1) of the first supply airflow, the target value (TV2) of the second supply airflow, the target value (TV3) of the exhaust airflow, and the controlled variable (CQ) for the refrigerant circuit (60); a first controller (25A) that executes the first air supply control; a second controller (25B) that executes the second air supply control; and a third controller (44) that executes the exhaust control.
  6. The ventilation system (1) according to claim 5, further comprising: a first air supply unit (20A) that includes the first air supply fan (22A), the first air supply detector (23A), and the first controller (25A) and is capable of autonomously adjusting the first supply airflow (AF1); and a second air supply unit (25B) that includes the second air supply fan (22B), the second air supply detector (23B), and the second controller (25B) and is capable of autonomously adjusting the second supply airflow (AF2).
  7. The ventilation system (1) according to claim 5 or 6, further comprising an exhaust unit (40) that includes the exhaust fan (42), the exhaust detector (43), and the third controller (44) and is capable of autonomously adjusting the exhaust airflow (AF3).

Description

TECHNICAL FIELD The present invention relates to a ventilation system. BACKGROUND ART Patent Literature 1 discloses a ventilation system (heat recovery outdoor air conditioning system) capable of first type ventilation. This ventilation system includes a heat exchanger, a supply air path and exhaust air path that allow the inside and outside of a target space to communicate with each other via the heat exchanger, an air supply fan that supplies air outside the target space to the target space via the supply air path, and an exhaust fan that exhausts air in the target space to the outside of the target space via the exhaust air path. In the above ventilation system, the heat exchanger of a heat pump outdoor air conditioner recovers heat from the return air in the indoor zone and then exhausts the heat to the outdoors, and uses the recovered heat for heat exchange with outside air from outdoors to supply the air to the indoor zone. CITATION LIST [PATENT LITERATURE] PATENT LITERATURE 1: Japanese Laid-Open Patent Publication No. 03-20573 US 2019/154270 A1 discloses a ventilation system comprising a refrigerant circuit that circulates refrigerant through a compressor, a first heat exchanger, and a second heat exchanger, a first air supply fan that supplies outdoor air to an indoor space, an exhaust fan that exhausts indoor air to an outdoor space, an air supply path that connects the outdoor space to the indoor space, and an exhaust air path that connects the outdoor space to the indoor space and has an interior in which the second heat exchanger and the exhaust fan are arranged. AU 2020 259881 A1 discloses a first air supply detector for detecting a first supply air flow blown out by a first air supply fan, a second air supply detector for detecting a second supply airflow blown out by a second air supply fan, and a control unit, wherein the control unit executes first air supply control to adjust a rotational speed of the first air supply fan so that the first supply airflow becomes a target value, and a second air supply control to adjust a rotational speed of the second air supply fan so that the second supply airflow becomes a target value. US 9 903 604 B2 establishes technological background. SUMMARY OF THE INVENTION [TECHNICAL PROBLEM] Since the conventional ventilation system is configured by the air supply fan, the exhaust fan, and the heat exchanger being housed in a single casing, it is not assumed, for example, to supply the supply air subjected to a heat exchange to a plurality of areas or to adjust the amount of supply air for each of the plurality of areas. An object of the present invention is to provide a ventilation system capable of supplying supply air subjected to a heat exchange to a plurality of areas in an airflow adjustable manner. [SOLUTION TO PROBLEM] (1) A ventilation system according to the present invention is defined in claim 1. In the ventilation system according to the present invention, the first heat exchanger and the first air supply fan and second air supply fan located further toward an indoor side than the first heat exchanger are included in the interior of the air supply path, so that the supply air subjected to a heat exchange can be supplied to the plurality of areas. In addition, since the control unit executes the first air supply control and the second air supply control, it is possible to adjust each of the first supply airflow and the second supply airflow. Thus, the supply air subjected to a heat exchange can be supplied to the plurality of areas in an airflow adjustable manner. (2) In a case where the ventilation system according to the present invention further includes a monitoring sensor for detecting state information that is at least one of an indoor air state, presence or absence of people indoors, and number of people indoors, the control unit may determine the target value of the first supply airflow and the target value of the second supply airflow on the basis of a detection result of the monitoring sensor. In this case, since the control unit determines the target value of the first supply airflow and the target value of the second supply airflow on the basis of the detection result of the monitoring sensor, ventilation contributing to the improvement of the indoor environment (for example, ventilation that decreases the CO2 concentration) can be performed for each area. (3) In a case where the ventilation system according to the present invention further includes an exhaust detector for detecting an exhaust airflow blown out by the exhaust fan, the control unit may execute exhaust control to adjust a rotational speed of the exhaust fan so that the exhaust airflow becomes a target value. In this case, since the control unit executes the exhaust control, the exhaust airflow can be adjusted. Thus, for example, appropriate ventilation can be performed by balancing the sum of the first supply airflow and the second supply airflow with the exhaust airflow.