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Air conditioning system

A technology for air conditioning systems and air conditioners, which is used in heating and ventilation control systems, heating and ventilation safety systems, space heating and ventilation, etc., and can solve the problems of impossible temperature distribution, inability to finely control, inability to save energy and comfort at the same time. , to achieve the effect of improving operating efficiency

Inactive Publication Date: 2006-04-19
HITACHI LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, since it is basically a technique of forcibly stopping the operation of the air conditioner for a predetermined time regardless of the indoor temperature and performing intermittent operation, it is impossible to perform control corresponding to the uneven temperature distribution of the indoor plane.
Therefore, it is impossible to finely control each indoor unit according to the deviation between the room temperature and the target temperature in some parts of the house, etc., and it is impossible to combine energy saving and individual comfort as a whole of multiple indoor units.

Method used

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  • Air conditioning system
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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] figure 1 It is a block diagram showing the system configuration of an embodiment of an air-conditioning system including the energy-saving control device of the present invention.

[0033] The energy saving control device 1 is connected to the air conditioner monitoring control device 201 and the indoor and outdoor state measurement device 4 through the communication line 3 .

[0034] The air conditioner 2 is composed of an indoor unit 202 and an outdoor unit 203 . The air conditioner 2 expands the refrigerant compressed by the outdoor unit 203 by the indoor unit 202, removes heat from the air drawn into the indoor unit 202, cools it, and discharges it as cold air from the outlet of the indoor unit 202 to the room.

[0035] There are also cases where a plurality of indoor units 202 are included. Multiple indoor units that only control the temperature setting etc. together can be processed together. In the present invention, only one indoor unit 202 is also included,...

Embodiment 2

[0106] Embodiment 2 is a continuous control method in which the air conditioner continues to operate at a high COP point corresponding to each load when the load of the air conditioner fluctuates due to changes in the outside air temperature, sunlight, and the number of people in the room.

[0107] The system configuration of the energy-saving control device of the second embodiment is the same as that of the first embodiment. The difference from the first embodiment lies in the processing procedures in the air conditioner operation stop control means 102 and the operating point determination means 106 .

[0108] Figure 5 It is a flowchart showing the processing procedure of the air conditioner operation stop control means 102 according to the second embodiment of the present invention.

[0109] (1) start

[0110] The air conditioner operation stop control means 102 starts processing in response to a COP optimal operation activation request from the input and output means 1...

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Abstract

This air-conditioning system including an indoor machine group 202, an outdoor machine 203 and an air-conditioner monitoring control device 201 is provided with an energy-saving control device 1 comprising: a comfort level monitoring means 110 for determining an indoor comfort level by indoor and outdoor states; an air-conditioner operation halt control means 102 for controlling the operation halt of the air conditioner so that the indoor comfort level is not deviated from a predetermined range; an air-conditioner characteristic database 107 composed by combining an air-conditioner output level resulting in high efficiency with an air-conditioner set value; an operation point determination means 106 for finding an air-conditioner set value for realizing an air-conditioner output level always resulting in the highest efficiency; an operation control means 103 for controlling the air-conditioner monitoring control device with the set value resulting in the highest efficiency found by the operation point determination means; and a halt control means 104 for halting the air conditioner.

Description

technical field [0001] The present invention relates to an air conditioning system, and more particularly, to an energy saving control device for achieving energy saving as a whole while maintaining a comfort level above a predetermined level in an air conditioning system including a plurality of indoor units. Background technique [0002] An air conditioner (air conditioner) is a device that cools or heats indoor air or outside air, blows it into the room, and maintains a comfortable indoor temperature or humidity. [0003] The value of the output energy of the air conditioner divided by the input energy, that is, cooling energy ÷ electric energy consumption or heating energy ÷ electric energy consumption, is generally called the coefficient of performance COP. For example, the COP during cooling of an electric-driven air conditioner is a value obtained by dividing the heat conversion value of the cooling output of the air conditioner by the heat conversion value of power c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F24F11/00
Inventor 富田泰志内崎晴美原田泰志正岛博松原正裕西口章菊池宏成小林延久
Owner HITACHI LTD