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Air-conditioning device

An air-conditioning device and indoor unit technology, applied in air-conditioning systems, high-efficiency regulation technology, space heating and ventilation, etc., can solve the problems of inability to continuously change the heat exchange capacity of intermediate heat exchangers, the small number of intermediate heat exchangers connected, and refrigeration Changes in heating capacity, etc.

Active Publication Date: 2014-08-06
MITSUBISHI ELECTRIC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0012] On the other hand, the air conditioners disclosed in Patent Documents 2 and 3 have the following problems: Usually, the number of intermediate heat exchangers installed is smaller than the number of connected indoor units, and the heat exchange capacity of the intermediate heat exchangers cannot be adjusted according to the cooling capacity of the indoor units. Even if the condensing temperature and evaporating temperature are controlled to be constant, the cooling and heating capacity will change according to the load and operation mode of the indoor unit.

Method used

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Examples

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Embodiment approach 1

[0032] figure 1 It is a refrigerant circuit diagram showing an example of the refrigerant circuit configuration of the air-conditioning apparatus 100 according to Embodiment 1 of the present invention. figure 2 It is a refrigerant circuit diagram showing another example of the refrigerant circuit configuration of the air-conditioning apparatus 100 according to Embodiment 1 of the present invention. based on figure 1 with figure 2 The circuit configuration and operation of the air conditioner 100 will be described. In this air conditioner, each indoor unit can freely select a cooling mode or a heating mode by utilizing a refrigeration cycle. Additionally, when including figure 1 In the drawings included below, the size relationship among the components may be different from the actual ones.

[0033] exist figure 1 Here, the air conditioner 100 has a heat source unit (outdoor unit) A, a plurality of indoor units C-E connected in parallel, and a relay unit B interposed be...

Embodiment approach 2

[0147] Figure 10 It is a schematic circuit configuration diagram showing an example of the refrigeration circuit configuration of the air conditioner 200 according to Embodiment 2 of the present invention. according to Figure 10 The air conditioner 200 will be described. In addition, in the second embodiment, the description will focus on the differences from the first embodiment described above, and the description of the same parts as those in the first embodiment, such as the refrigerant circuit structure, will be omitted. In addition, since each operation mode performed by the air conditioner 200 is the same as that of the air conditioner 100 of Embodiment 1, description is abbreviate|omitted.

[0148] The heat transfer area of ​​the intermediate heat exchangers 9a, 9b in the relay unit B of the air conditioner 200 figure 1 with figure 2 The air conditioning device 100 shown is different. For example, the heat transfer area of ​​the intermediate heat exchanger 9b a...

Embodiment approach 3

[0151] Figure 11 It is a schematic circuit configuration diagram showing an example of the refrigerant circuit configuration of the air conditioner 300 according to Embodiment 3 of the present invention. according to Figure 11 The air conditioner 300 will be described. In addition, in the third embodiment, the description will focus on the differences from the first embodiment described above, and the description of the parts that are the same as those in the first embodiment, such as the refrigerant circuit structure, will be omitted. In addition, since each operation mode performed by the air conditioner 300 is the same as that of the air conditioner 100 of Embodiment 1, description is abbreviate|omitted.

[0152] Air conditioner 300 with figure 1 with figure 2 The difference of the air conditioner 100 shown is that the pipelines connecting the heat source unit A and the relay unit B are changed from 2 to 3. In the air conditioner 300, the third refrigerant line 22 i...

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Abstract

When indoor units are performing a cooling operation, an air-conditioning apparatus controls third flow passage switching valves, for example a first solenoid valve, a second solenoid valve, a third solenoid valve, and a fourth solenoid valve, so that a number of intermediate heat exchangers operating as evaporators is greater than in a cooling main operation. During the cooling main operation, a target value for suction pressure or evaporating temperature at a compressor is set equal to or lower than that in a case in which the indoor units are performing the cooling operation, and a frequency of the compressor and a capacity of a heat-source-side heat exchanger are controlled.

Description

technical field [0001] The present invention relates to an air conditioner using a refrigeration cycle, in particular to an air conditioner that transfers cold energy or heat generated by the refrigeration cycle to a use-side heat exchanger through other heat media. Background technique [0002] At present, there is a repeater unit, multiple indoor units connected to the outdoor unit, and can perform cooling operation, heating operation, and simultaneous cooling and heating air conditioners in mixed (simultaneous) operation. The cooling operation refers to the indoor unit that is running. The operation mode is only cooling operation, the heating operation refers to the operation mode of the running indoor unit is heating only operation, and the mixed operation refers to the operation of cooling and heating by each indoor unit respectively (for example, Refer to Patent Documents 1-3). [0003] Patent Document 1 discloses a method for controlling the compressor frequency of a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F24F11/02F25B1/00
CPCF25B13/00F25B2313/0231F24F11/008F25B25/005Y02B30/741F25B2600/0253F25B2313/0272F24F3/065F24F11/022F25B2313/003F24F11/83F24F11/72Y02B30/70F24F11/85F24F11/84
Inventor 竹中直史若本慎一森本修岛本大祐
Owner MITSUBISHI ELECTRIC CORP