Air conditioning system

Patent metadata

Field	Value
Publication number	US-11428422-B2
Application number	US-202117554871-A
Country	US
Kind code	B2
Filing date	Dec 17, 2021
Priority date	Jun 26, 2019
Publication date	Aug 30, 2022
Grant date	Aug 30, 2022

Abstract

When an outdoor air handler performs a heating humidifying operation and an air conditioner performs a cooling operation, a control device adjusts at least one of a to-be-supplied air temperature of the outdoor air handler, a to-be-supplied air flow rate of the outdoor air handler, a to-be-supplied water flow rate of the outdoor air handler, and a cooling temperature that is a temperature at an air heat exchanger of the air conditioner. The control device adjusts the to-be-supplied air temperature and the cooling temperature on the basis of dehumidification information, operation information, temperature information, and humidity information. The operation information is information regarding an operating state of the air conditioner.

First claim

The invention claimed is:

1. An air conditioning system including
an outdoor air handler configured to treat taken-in outdoor air and supply the treated air to a target space, and
an air conditioner configured to treat indoor air taken in from the target space and supply the treated air to the target space, the air conditioning system comprising:
a control device configured to, when the outdoor air handler performs a heating humidifying operation for heating and humidifying the outdoor air and the air conditioner performs a cooling operation for cooling the indoor air, adjust at least one of a to-be-supplied air temperature that is a temperature of the treated outdoor air to be supplied to the target space by the outdoor air handler, a to-be-supplied air flow rate that is a flow rate of the outdoor air to be supplied to the target space by the outdoor air handler, and a to-be-supplied water flow rate that is a flow rate of water for humidification to be supplied to the outdoor air handler, based on dehumidification information regarding an amount of condensed water generated in the air conditioner, operation information regarding an operating state of the air conditioner, temperature information regarding a relationship between an air temperature in the target space and a set temperature, and humidity information regarding a relationship between a humidity in the target space and a set humidity, wherein
in the cooling operation, the air conditioner selectively performs a cooling action for cooling the indoor air and a suspending action for suspending cooling of the indoor air,
the dehumidification information is information indicating whether or not condensed water is generated in the air conditioner,
the operation information is information indicating which of the cooling action or the suspending action the air conditioner is performing,
the temperature information is information indicating any of an appropriate heating state in which the air temperature in the target space is in a predetermined set temperature range including the set temperature, an excessive heating state in which the air temperature in the target space is higher than an upper-limit value of the set temperature range, and a deficient heating state in which the air temperature in the target space is lower than a lower-limit value of the set temperature range,
the humidity information is information indicating any of an appropriate humidification state in which the humidity in the target space is in a predetermined set humidity range including the set humidity, an excessive humidification state in which the humidity in the target space is higher than an upper-limit value of the set humidity range, and a deficient humidification state in which the humidity in the target space is lower than a lower-limit value of the set humidity range, and
the control device
creates, based on the operation information and the temperature information, heating capacity information indicating whether a heating capacity of the outdoor air handler is appropriate, excessive, or deficient, and
adjusts at least one of the to-be-supplied air temperature, the to-be-supplied air flow rate, and the to-be-supplied water flow rate, based on the dehumidification information, the humidity information, and the heating capacity information.

2. The air conditioning system according to claim 1 , wherein
the control device
sets, as the heating capacity information, information indicating that the heating capacity of the outdoor air handler is excessive regardless of the operation information in a case where the temperature information indicates the excessive heating state,
sets, as the heating capacity information, information indicating that the heating capacity of the outdoor air handler is excessive in a case where the operation information indicates that the air conditioner performs the cooling action and the temperature information indicates the appropriate heating state,
sets, as the heating capacity information, information indicating that the heating capacity of the outdoor air handler is appropriate in a case where the operation information indicates that the air conditioner performs the suspending action and the temperature information indicates the appropriate heating state, and
sets, as the heating capacity information, information indicating that the heating capacity of the outdoor air handler is deficient regardless of the operation information in a case where the temperature information indicates the deficient heating state.

3. The air conditioning system according to claim 2 , wherein
the control device,
when the dehumidification information indicates that condensed water is generated in the air conditioner and the heating capacity information indicates that the heating capacity of the outdoor air handler is excessive,
decreases at least one of the to-be-supplied air temperature and the to-be-supplied air flow rate regardless of the humidity information.

4. The air conditioning system according to claim 2 , wherein
the control device,
when the dehumidification information indicates that no condensed water is generated in the air conditioner and the heating capacity information indicates that the heating capacity of the outdoor air handler is excessive,
decreases at least one of the to-be-supplied air temperature and the to-be-supplied air flow rate in a case where the humidity information indicates the excessive humidification state, and
changes neither the to-be-supplied air temperature nor the to-be-supplied air flow rate in a case where the humidity information indicates the appropriate humidification state or the deficient humidification state.

5. The air conditioning system according to claim 2 , wherein
the control device,
when the dehumidification information indicates that condensed water is generated in the air conditioner and the heating capacity information indicates that the heating capacity of the outdoor air handler is appropriate,
decreases at least one of the to-be-supplied air temperature and the to-be-supplied air flow rate in a case where the humidity information indicates the excessive humidification state, and
changes neither the to-be-supplied air temperature nor the to-be-supplied air flow rate in a case where the humidity information indicates the appropriate humidification state or the deficient humidification state.

6. The air conditioning system according to claim 2 , wherein
the control device,
when the dehumidification information indicates that no condensed water is generated in the air conditioner and the heating capacity information indicates that the heating capacity of the outdoor air handler is appropriate,
changes neither the to-be-supplied air temperature nor the to-be-supplied air flow rate regardless of the humidity information.

7. The air conditioning system according to claim 2 , wherein
the control device,
when the dehumidification information indicates that condensed water is generated in the air conditioner and the heating capacity information indicates that the heating capacity of the outdoor air handler is deficient,
decreases at least one of the to-be-supplied air temperature and the to-be-supplied air flow rate in a case where the humidity information indicates the excessive humidification state,
changes neither the to-be-supplied air temperature nor the to-be-supplied air flow rate in a case where the humidity information indicates the appropriate humidification state, and
increases at least one of the to-be-supplied air temperature and the to-be-supplied air flow rate in a case where the humidity information indicates the deficient humidification state.

8. The air conditioning system according to claim 2 , wherein

Assignees

• Daikin Ind Ltd

Inventors

• Okamoto Yasunori
• Fujita Naotoshi
• Tatsumi Kouji
• Kawagishi Masaaki
• UMASE Shinya

Classifications

• F24F1/0087

  with humidification means · CPC title

• F24F13/22

  Means for preventing condensation or evacuating condensate · CPC title

• F24F2003/144

  by dehumidification only · CPC title

• F24F3/14 Primary

  by humidification; by dehumidification · CPC title

• F24F5/001

  Compression cycle type · CPC title