Air conditioning system

• US 20090134231A1
• Filed: 05/23/2006
• Published: 05/28/2009
• Est. Priority Date: 05/24/2005
• Status: Active Grant

• Current Assignee: Daikin Industries Ltd
• Original Assignee: Daikin Industries Ltd
• Inventors: Matsui, Nobuki
• Granted Patent: US 7,757,961 B2
• Time in Patent Office: Days
• US Class Current: 236/44.A
• CPC Class Codes: F24F 1/0035 characterised by introduction of outside air to the room
• CPC Class Codes: F24F 11/0008 for air-humidification F24F11/30 takes precedence
• CPC Class Codes: F24F 11/61 using timers
• CPC Class Codes: F24F 11/66 Sleep mode
• CPC Class Codes: F24F 2110/12 of the outside air
• CPC Class Codes: F24F 2221/54 Heating and cooling, simultaneously or alternatively
• CPC Class Codes: F24F 2221/56 Cooling being a secondary aspect
• CPC Class Codes: F24F 3/1411 by absorbing or adsorbing water, e.g. using an hygroscopic desiccant
• CPC Class Codes: F24F 3/1429 alternatively operating a heat exchanger in an absorbing/adsorbing mode and a heat exchanger in a regeneration mode
• CPC Class Codes: F24F 5/0042 characterised by the application of thermo-electric units or the Peltier effect

Abstract

The control means (41 and 42) cause the air conditioner to start air temperature control when temperature To of the outdoor air is in a pre-set range at the time of starting the air conditioning system (1), after the lapse of a pre-set time since the humidity controller (10) started adjusting air humidity. The room temperature nears the humidity set value Rs during the time air temperature control is started in the air conditioner (20).

Claims

1. An air conditioning system having a humidity controller (10) for adjusting humidity of outdoor air for supply thereof into a room and an air conditioner (20) for supplying into a room air whose temperature has been controlled, wherein:

the humidity controller (10) comprises;

adsorbing members (51 and 52) by which an adsorbent is supported; and

heating source means (50) for at least heating the adsorbent of the adsorbing members (51 and 52), the humidity controller (10) adjusting the humidity of the outdoor air in contact with the adsorbent of the adsorbing members (51 and 52); and

the air conditioning system comprises controlling means (41 and 42) for, when a temperature To of the outdoor air is within a pre-set range at the time of starting the air conditioning system (1), causing the air conditioner (20) to start air temperature control after a lapse of a pre-set time since the humidity controller (10) started adjusting air humidity.

3. The air conditioning system according to claim 1 or 2, wherein:

the air conditioner (20) is capable of selecting between a cooling operating mode for cooling the room and a heating operating mode for heating the room;

at the time of causing the air conditioner (20) to start air temperature control after the lapse of the pre-set time since the humidity controller (10) started air humidity adjustment, the control means (41 and 42) perform a decision-making action to determine an operating mode of the air conditioner (20) on the basis of a set value Ts and a measured value of the room temperature.

4. The air conditioning system according to claim 3, wherein in the decision-making action, the control means (41 and 42) determine the operating mode of the air conditioner (20) on the basis of a changed value of a difference between the set value Ts and the measured value of the room temperature from the start of the air humidity adjustment by the humidity controller (10) to the start of the air temperature control by the air conditioner (20).

5. The air conditioning system according to claim 3, wherein the control means (41 and 42) are configured to:

set up the air conditioner (20) at a thermostat-off status to stop the air temperature control by cases where the measured value of the room temperature falls below the set value Ts during the air cooling and where the measured value of the room temperature increases above the set value Ts during the heating operation; and

to, after the lapse of a pre-set time from the start of the thermostat-off status, determine the operating mode of the air conditioner (20) on the basis of the set value Ts and the measured value of the room temperature.

6. The air conditioning system according to claim 3, wherein the control means (41 and 42) are configured to:

set up the air conditioner (20) in a thermostat-off status to stop the air temperature control in cases where the measured value of the room temperature falls below the set value Ts during the air cooling and where the measured value of the room temperature increase above the set value Ts during the heating operation; and

to cause, if the difference between the set value Ts and the measured value of the room temperature should increase during a period of time from a certain point in time in the thermostat-off status until a lapse of a pre-set time, the air conditioner (20) to operate on an operating mode different from the operating mode immediately before entering the thermostat-off status.

2. An air conditioning system having a humidity controller (10) for adjusting humidity of outdoor air for supply thereof into a room and an air conditioner (20) for supplying into a room air whose temperature is controlled, wherein:

the humidity controller (10) comprises a refrigerant circuit (50) to which adsorbing heat exchangers (51 and 52) with an adsorbent supported thereon are connected, thus carrying out a refrigerating cycle, the humidity controller (10) adjusting the humidity of the outdoor air in contact with the adsorbent by heating or refrigerating the adsorbent of the adsorbing heat exchangers (51 and 52) through the refrigerant of the refrigerant circuit (50); and

the air conditioning system comprises controlling means (41 and 42) for, when a temperature To of the outdoor air is within a pre-set range at the time of starting the air conditioning system (1), causing the air conditioner (20) to start air temperature control after a lapse of a pre-set time since the humidity controller (10) started adjusting air humidity.