CN-121399418-B - Air conditioning system and ventilation control method

Abstract

In order to perform ventilation for a minimum time and an amount required in a range where the carbon dioxide concentration in a space to be ventilated does not exceed a given value, an air conditioning system including a ventilation device includes a ventilation device and a control unit that controls the ventilation device, wherein the control unit obtains the carbon dioxide concentration in the space to be ventilated of the ventilation device, and adjusts the ventilation amount of the ventilation device based on the current value of the carbon dioxide concentration and the temporal change of the carbon dioxide concentration.

Inventors

• Gamoh Keiji

Assignees

• 大金工业株式会社

Dates

Publication Date

20260508

Application Date

20240711

Priority Date

20230714

Claims (11)

1. 1. An air conditioning system includes a ventilator and a control unit for controlling the ventilator, The control part is provided with a control part, Acquiring the carbon dioxide concentration of a space to be ventilated by the ventilator, Calculating an arrival time until the carbon dioxide concentration reaches an upper limit value or a lower limit value of the carbon dioxide concentration adjustment range using a current value of the carbon dioxide concentration and a temporal change between the carbon dioxide concentration and the current value before the current value, And adjusting a ventilation volume of the ventilation device based on the arrival time.
2. 2. The air conditioning system of claim 1, wherein, The control unit increases the ventilation amount of the ventilator by 1 st amplification when the current value of the carbon dioxide concentration is smaller than the upper limit value and the arrival time until the carbon dioxide concentration reaches the upper limit value is within 1 st time.
3. 3. The air conditioning system of claim 2, wherein, The control unit increases the ventilation amount of the ventilator by a2 nd amplification greater than the 1 st amplification when the arrival time is within a2 nd time shorter than the 1 st time.
4. 4. The air conditioning system of claim 1, wherein, The control unit decreases the ventilation amount of the ventilator by a1 st decrease when the current value of the carbon dioxide concentration is greater than the lower limit value and the arrival time until the carbon dioxide concentration reaches the lower limit value is within a 3 rd time.
5. 5. The air conditioning system of claim 4, wherein, The control unit reduces the ventilation amount of the ventilator by a 2 nd reduction which is larger than the 1 st reduction, or stops the operation of the ventilator when the arrival time is within a 4 th time which is shorter than the 3 rd time.
6. 6. The air conditioning system according to any of claims 1 to 5, wherein, The control unit stops the operation of the ventilator when the current value of the carbon dioxide concentration is equal to or less than a predetermined threshold value that is smaller than the lower limit value.
7. 7. The air conditioning system according to any of claims 1 to 5, wherein, The air conditioning system includes a plurality of ventilation devices, The control unit adjusts ventilation amounts of the plurality of ventilation devices based on the arrival time.
8. 8. The air conditioning system according to any of claims 1 to 5, wherein, The control unit determines that the ventilation time interval is longer than the carbon dioxide concentration measurement time interval.
9. 9. The air conditioning system according to any of claims 1 to 5, wherein, The control unit smoothes the obtained carbon dioxide concentration to calculate a temporal change in the carbon dioxide concentration.
10. 10. The air conditioning system according to any of claims 1 to 5, wherein, The air conditioning system includes the ventilation device and a communication device capable of communicating with the ventilation device, The communication device has the control section.
11. 11. A ventilation control method for an air conditioning system including a ventilation device and a control unit for controlling the ventilation device, The control part is provided with a control part, Acquiring the carbon dioxide concentration of a space to be ventilated by the ventilator, Calculating an arrival time until the carbon dioxide concentration reaches an upper limit value or a lower limit value of the carbon dioxide concentration adjustment range using a current value of the carbon dioxide concentration and a temporal change between the carbon dioxide concentration and the current value before the current value, And adjusting a ventilation volume of the ventilation device based on the arrival time.

Description

Air conditioning system and ventilation control method Technical Field The present invention relates to an air conditioning system and a ventilation control method. Background There are air conditioning systems that control an air conditioner and a ventilator to adjust the ventilation state in a room. For example, there is known a technique of detecting carbon dioxide in a room, setting a ventilation mode of a priority ventilation process when the carbon dioxide concentration is equal to or higher than a threshold concentration, stopping the air conditioner 1, and operating the ventilator 3 (for example, refer to patent document 1). < Prior art document > < Patent document > Patent document 1 Japanese patent laid-open No. 2000-088320 Disclosure of Invention < Problem to be solved by the invention > In an air conditioning system including a ventilation device, there is a demand for performing ventilation for a minimum time and an amount required within a range where the carbon dioxide concentration in a space to be ventilated does not exceed a given value in order to save power. However, for example, in the conventional technique as shown in patent document 1, when the carbon dioxide concentration exceeds the threshold value, the operation of the ventilator is started or the ventilation amount is increased, and therefore, there is a problem that sufficient power saving cannot be achieved. The present invention enables ventilation of a space to be ventilated within a range where the carbon dioxide concentration in the space does not exceed a given value in an air conditioning system including a ventilation device. < Means for solving the problems > An air conditioning system according to claim 1 of the present invention is an air conditioning system including a ventilator and a control unit that controls the ventilator, wherein the control unit obtains a carbon dioxide concentration in a space to be ventilated by the ventilator, and adjusts a ventilation amount of the ventilator based on a current value of the carbon dioxide concentration and a temporal change in the carbon dioxide concentration. According to the air conditioning system according to claim 1 of the present invention, in the air conditioning system including the ventilation device, ventilation can be performed for a minimum time and in a minimum amount of time required within a range in which the carbon dioxide concentration in the space to be ventilated does not exceed a given value. In the air conditioning system according to claim 2 of the present invention, in the air conditioning system according to claim 1, the control unit adjusts the ventilation amount of the ventilator using the current value of the carbon dioxide concentration, a given value as a given carbon dioxide concentration, and a temporal change in the carbon dioxide concentration. Thus, the air conditioning system can suppress the ventilation amount while suppressing the carbon dioxide concentration in the space to be ventilated from reaching the given value by using the information on the temporal change in the carbon dioxide concentration. In the air conditioning system according to claim 3 of the present invention, in the air conditioning system according to claim 1, the control unit adjusts the ventilation amount of the ventilator using a difference between the current value of the carbon dioxide concentration and the given value of the carbon dioxide concentration, and a temporal change in the carbon dioxide concentration. Thus, the air conditioning system can suppress the occurrence of the carbon dioxide concentration in the space to be ventilated reaching the predetermined value and suppress the ventilation amount by using the information of the difference between the current value of the carbon dioxide concentration and the predetermined value of the carbon dioxide concentration. In the air conditioning system according to claim 1, according to claim 4 of the present invention, the control unit, Calculating an arrival time until the carbon dioxide concentration reaches a given value as a given carbon dioxide concentration from a current value of the carbon dioxide concentration and a temporal change of the carbon dioxide concentration, and adjusting a ventilation amount of the ventilator based on the arrival time. Thus, the air conditioning system can suppress the ventilation amount while suppressing the carbon dioxide concentration in the space to be ventilated from reaching the given value by using the information on the arrival time until the carbon dioxide concentration reaches the given value as the given carbon dioxide concentration. In the air conditioning system according to claim 5 of the present invention, in the air conditioning system according to claim 1 or claim 4, the control unit increases the ventilation amount of the ventilator by 1 st amplification when the current value of the carbon dioxide concentration is smaller than a predetermined 1 st given