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JP-7856884-B2 - Ventilation system

JP7856884B2JP 7856884 B2JP7856884 B2JP 7856884B2JP-7856884-B2

Inventors

  • 宮崎 猛
  • 山野井 喜記
  • 井吉 悠太
  • 佐伯 久美子
  • 小松 彰

Assignees

  • ダイキン工業株式会社

Dates

Publication Date
20260512
Application Date
20211217

Claims (9)

  1. A refrigerant circuit (60) that circulates refrigerant to the compressor (52), the first heat exchanger (12), and the second heat exchanger (32), An air intake fan (22) that supplies outdoor air to the indoors, An exhaust fan (42) that expels indoor air to the outside, A supply air passage connecting the outdoors and indoors, in which the first heat exchanger (12) and the supply air fan (22) are arranged, An exhaust air passage connecting the outdoors and indoors, in which the second heat exchanger (32) and the exhaust fan (42) are arranged, The air supply detection unit (23) detects the amount of air supply (AF1) blown out by the air supply fan (22), An exhaust detection unit (43) for detecting the amount of exhaust air (AF2) blown out by the exhaust fan (42), It includes a control unit (CU), The refrigerant circuit (60) further comprises a four-way valve (53) and an expansion valve (54), The control unit (CU) is Air supply control that adjusts the rotation speed of the air supply fan (22) so that the air supply volume (AF1) becomes a target value (TV1), Exhaust control is performed to adjust the rotation speed of the exhaust fan (42) so that the exhaust air volume (AF2) becomes a target value (TV2) . A ventilation system (1) that determines a control quantity (CQ) for at least one of the compressor (52), the four-way valve (53), and the expansion valve (54) based on the target value of the supply air volume (TV1) and the target value of the exhaust air volume (TV2).
  2. The ventilation system (1) is The system further includes an input device that allows the user to input settings information, including atmospheric pressure conditions representing positive or negative pressure indoors. The control unit (CU) is If the aforementioned atmospheric pressure condition is positive pressure, the target value of the supply airflow rate (TV1) is set higher than the target value of the exhaust airflow rate (TV2). The ventilation system (1) according to claim 1, wherein if the atmospheric pressure condition is negative pressure, the target value of the exhaust air volume (TV2) is set higher than the target value of the supply air volume (TV1).
  3. The ventilation system (1) is It is further equipped with a pressure sensor (80) for detecting indoor air pressure, The setting information that the user can input into the input device includes: It includes pressure information to specify the level of indoor pressure settings. The control unit (CU) is The ventilation system (1) according to claim 2, wherein the target value of the supply air volume (TV1) and the target value of the exhaust air volume (TV2) are determined so that the indoor air pressure becomes the set air pressure specified in the air pressure information.
  4. The aforementioned input device is The ventilation system (1) according to claim 2 or 3, wherein the remote control device (70) is installed in the control room or the room to be ventilated (RM) and is capable of wired or wireless communication.
  5. A refrigerant circuit (60) that circulates refrigerant to the compressor (52), the first heat exchanger (12), and the second heat exchanger (32), An air intake fan (22) that supplies outdoor air to the indoors, An exhaust fan (42) that expels indoor air to the outside, A supply air passage connecting the outdoors and indoors, in which the first heat exchanger (12) and the supply air fan (22) are arranged, An exhaust air passage connecting the outdoors and indoors, in which the second heat exchanger (32) and the exhaust fan (42) are arranged, The air supply detection unit (23) detects the amount of air supply (AF1) blown out by the air supply fan (22), An exhaust detection unit (43) for detecting the amount of exhaust air (AF2) blown out by the exhaust fan (42), It includes a control unit (CU), The control unit (CU) is Air supply control that adjusts the rotation speed of the air supply fan (22) so that the air supply volume (AF1) becomes a target value (TV1), Exhaust control is performed to adjust the rotation speed of the exhaust fan (42) so that the exhaust air volume (AF2) becomes a target value (TV2). The aforementioned intake fan (22) A first air supply fan (22A) that supplies outdoor air to the first indoor room (RM1), The exhaust fan (42) includes a second supply fan (22B) that supplies outdoor air to a second indoor room (RM2), A first exhaust fan (42A) discharges the air from the first room (RM1) to the outside, The system includes a second exhaust fan (42B) for discharging the air from the second room (RM2) to the outside, The aforementioned air supply detection unit (23) A first air supply detection unit (23A) for detecting the first air supply air volume (AF11) blown out by the first air supply fan (22A), The system includes a second supply air detection unit (23B) for detecting the second supply air volume (AF21) blown out by the second supply air fan (22B), The exhaust detection unit (43) is A first exhaust detection unit (43A) for detecting the first exhaust air volume (AF12) blown out by the first exhaust fan (42A), The system includes a second exhaust detection unit (43B) for detecting the second exhaust air volume (AF22) blown out by the second exhaust fan (42B), The aforementioned air supply control is, A first air supply control system adjusts the rotation speed of the first air supply fan (22A) so that the first air supply volume (AF11) becomes a target value (TV11), The system includes a second air supply control that adjusts the rotation speed of the second air supply fan (22B) so that the second air supply volume (AF21) becomes a target value (TV21), The exhaust control described above is A first exhaust control system adjusts the rotation speed of the first exhaust fan (42A) so that the first exhaust air volume (AF12) becomes a target value (TV12), A ventilation system (4) including a second exhaust control that adjusts the rotation speed of the second exhaust fan (42B) so that the second exhaust air volume (AF22) becomes a target value (TV22).
  6. The ventilation system (4) is The user can input the following configuration information: A first atmospheric pressure condition representing the positive or negative pressure of the first room (RM1), and The system further includes an input device that includes a second atmospheric pressure condition representing the positive or negative pressure of the second room (RM2), The control unit (CU) is If the first atmospheric pressure condition is positive pressure, the target value of the first supply airflow rate (TV11) is set higher than the target value of the first exhaust airflow rate (TV12). If the first atmospheric pressure condition is negative pressure, the target value of the first exhaust airflow (TV12) is set higher than the target value of the first supply airflow (TV11). If the second atmospheric pressure condition is positive pressure, the target value of the second supply airflow rate (TV21) is set higher than the target value of the second exhaust airflow rate (TV22). The ventilation system (4) according to claim 5 , wherein if the second atmospheric pressure condition is negative pressure, the target value of the second exhaust airflow (TV22) is set higher than the target value of the second supply airflow (TV21).
  7. The ventilation system (4) is A first pressure sensor (80A) for detecting the pressure in the first room (RM1), The system further includes a second pressure sensor (80B) for detecting the pressure in the second chamber (RM2), The setting information that the user can input into the input device includes: First atmospheric pressure information for specifying the amount of pressure set in the first room (RM1), This includes second atmospheric pressure information for specifying the amount of pressure set in the second room (RM2), The control unit (CU) is The target value (TV11) of the first supply airflow rate and the target value (TV12) of the first exhaust airflow rate are determined so that the atmospheric pressure in the first room (RM1) becomes the set atmospheric pressure specified in the first atmospheric pressure information. The ventilation system (4) according to claim 6, wherein the target value of the second supply airflow rate (RV21) and the target value of the second exhaust airflow rate (TV22) are determined so that the air pressure in the second room (RM2) becomes the set air pressure specified by the second air pressure information.
  8. The aforementioned input device is The ventilation system (4) according to claim 7 , wherein the remote control devices (70A, 70B) are wired or wirelessly operated, and are installed in the control room or the first room (RM1) and the second room (RM2).
  9. The refrigerant circuit (60) further comprises a four-way valve (53) and an expansion valve (54), The control unit (CU) is A ventilation system (4) according to any one of claims 5 to 8, wherein a control amount (CQ) of at least one of the compressor (52), the four-way valve (53), and the expansion valve (54) is determined based on the target value of the first supply air volume (TV11), the target value of the first exhaust air volume (TV12), the target value of the second supply air volume (TV21), and the target value of the second exhaust air volume (TV22).

Description

This disclosure relates to ventilation systems. Patent Document 1 describes a ventilation system (heat recovery ventilation system) capable of performing Type 1 ventilation. This ventilation system comprises a heat exchanger, an air supply passage and an exhaust passage that connect the inside and outside of the target space via the heat exchanger, an air supply fan that supplies air from outside the target space to the target space via the air supply passage, and an exhaust fan that exhausts air from inside the target space to the outside via the exhaust passage. In the ventilation system described above, the heat exchanger in the heat pump-type outdoor air handling unit recovers heat from the return air in the indoor zone before exhausting it outdoors. Furthermore, this recovered heat is used to exchange heat with outside air before supplying it to the indoor zone. Japanese Patent Application Publication No. 3-20573 This is a longitudinal cross-sectional view of a building showing an example of the overall configuration of a ventilation system according to the first embodiment.An example of a control block in the control system of a control unit.This is a flowchart illustrating an example of information processing by the main controller.This flowchart shows an example of the process for determining target values for supply and exhaust airflow rates.This flowchart shows an example of information processing by the air intake and exhaust controllers.This is a longitudinal cross-sectional view of a building showing an example of the overall configuration of a ventilation system according to the second embodiment.An example of a control block in the control system of a control unit.This is a flowchart illustrating an example of information processing by the main controller.This flowchart shows an example of the process for determining target values for supply and exhaust airflow rates.This flowchart shows an example of information processing by the air intake and exhaust controllers. <First Embodiment> [Overall configuration of the ventilation system] Figure 1 is a longitudinal cross-sectional view of a building showing an example of the overall configuration of ventilation system 1. In Figure 1, the reference numerals "OA", "SA", "RA", and "EA" have the following meanings, respectively. OA: This is outdoor air (outside air). It is also the air that System 1 draws in from outside. SA: This is the air (supply air) that System 1 sends into the building. RA: This is indoor air (return air). It is also the air that System 1 draws in from indoors. EA: This is the air (exhaust) that System 1 discharges to the outside. The ventilation system 1 of the first embodiment is a system that performs Type 1 ventilation in an indoor target space RM while controlling the temperature of the supply air SA and recovering heat from the return air RA. The target space RM is, for example, the indoor space of various buildings such as office buildings, hospitals, and factories. The target space RM is preferably a highly airtight room for a predetermined purpose, but it may also be, for example, an indoor corridor, staircase, or entrance. In addition, an indoor unit 2 of an air conditioning system separate from the ventilation system 1 may be installed in the target space RM. As shown in Figure 1, the ventilation system 1 comprises a heat exchange unit 10 on the utilization side (supply side), a supply unit 20, a heat exchange unit 30 on the recovery side (exhaust side), an exhaust unit 40, a compressor unit 50, and a refrigerant circuit 60. The heat exchange unit 10 and the air supply unit 20 are installed in the ceiling space of the target space RM, while the heat exchange unit 30, the exhaust unit 40, and the compressor unit 50 are installed inside the walls of the target space RM. The ventilation system 1 further includes an input device 70, which is an input device that allows user operation input, and a pressure sensor 80. The input device 70 is, for example, a remote control device mounted on the wall of the target space RM. The input device 70 may be installed in a room other than the target space RM, such as a control room (not shown). The pressure sensor 80 is a sensor that monitors the atmospheric pressure indoors. The pressure sensor 80 can be connected via wired or wireless communication in accordance with a predetermined communication standard and can be mounted on the ceiling surface of the target space RM. The installation locations of each unit shown in Figure 1 are just examples; for example, the heat exchange unit 30 and the exhaust unit 40 may be placed in the ceiling space, and the return air RA may be drawn in from the ceiling side. Furthermore, at least one of the heat exchange unit 30, exhaust unit 40, and compressor unit 50 may be installed outdoors. [Components of each unit] The user-side heat exchange unit 10 has a casing 11 and a plurality of devices housed in the casing 11. The plurality of devices include