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air conditioner

An air-conditioning device and throttling device technology, applied in lighting and heating equipment, refrigeration components, mechanical equipment, etc., can solve the problems of unmaintainable air-conditioning device reliability, compressor damage, etc., to prevent damage, prevent overflow, and ensure reliability sexual effect

Active Publication Date: 2022-01-18
MITSUBISHI ELECTRIC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If excessive liquid return occurs, it may cause damage to the compressor, etc., and there is a possibility that the reliability of the air conditioner cannot be maintained.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach 1

[0025] figure 1 It is a figure which shows an example of the structure of the air-conditioning apparatus 100 which concerns on Embodiment 1 of this invention. Such as figure 1 As shown, the air conditioner 100 according to Embodiment 1 has a structure in which the outdoor unit 1 and the indoor unit 2 are connected via, for example, two main pipes 5 .

[0026] In addition, the air conditioner 100 has a main refrigerant circuit and an injection flow path through which refrigerant flows. In Embodiment 1, the main refrigerant circuit connects the accumulator 19, the compressor 10, the refrigerant flow switching device 11, the heat source side heat exchanger 12, the outdoor side expansion device 45, and the load side through the main pipe 5 and the refrigerant piping. The throttling device 25 and the load-side heat exchanger 26 are connected to each other in an annular circuit. In addition, in the injection flow path, the refrigerant flows from the refrigerant pipe 4 located bet...

Embodiment approach 2

[0100] Figure 6 It is a figure which shows an example of the structure of the air-conditioning apparatus 100 which concerns on Embodiment 2 of this invention. exist Figure 6 , marked with figure 1 Devices and the like with the same reference numerals perform the same operations as those described in the first embodiment. In the air conditioner 100 according to Embodiment 2, a plurality of outdoor units 1 are pipe-connected in parallel to form a refrigerant circuit. exist Figure 6 , two outdoor units 1 are connected in parallel.

[0101]

[0102] Figure 6 The configurations of the outdoor unit 1a and the outdoor unit 1b shown are the same as those of the outdoor unit 1 described in the first embodiment. In addition, the operations in the heating operation mode and the cooling operation mode, and the operation when spraying is performed are basically the same as those of the outdoor unit 1 described in the first embodiment. Therefore, when it is not necessary to dis...

Embodiment approach 3

[0158] Figure 8 It is a figure which shows an example of the structure of the air-conditioning apparatus 100 which concerns on Embodiment 3 of this invention. Next, an air conditioner according to Embodiment 3 of the present invention will be described. Here, the same reference numerals are assigned to devices and the like having the same functions and actions as those in the first and second embodiments.

[0159] Such as Figure 8 As shown, the air conditioner 100 has two outdoor units 1 (1a, 1b) as heat source units, a plurality of indoor units 2 (2a, 2b, 2c, 2d), and an air conditioner installed between the outdoor unit 1 and the indoor units 2a-2d. There is a relay device 3 with a switching device between them. The outdoor unit 1 and the relay device 3 are connected through a plurality of main pipes 5 through which the refrigerant circulates. The relay device 3 is connected to each of the indoor units 2a to 2d through a plurality of branch pipes 8 through which the re...

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PUM

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Abstract

The air conditioner according to the present invention connects the outdoor unit, at least one load-side throttle device, and at least one load-side heat exchanger through piping to form a refrigerant circuit for circulating the refrigerant. The outdoor unit has a compressor, The injection port that introduces the refrigerant into the suction chamber; the heat exchanger on the heat source side performs the heat exchange of the refrigerant; the throttle device and the liquid receiver on the outdoor side, and the heat exchanger on the load side perform heat exchange between the load and the refrigerant, and the outdoor unit has : Injection piping, one end is connected to the portion between the heat source side heat exchanger and the load side throttling device in the refrigerant circuit, and the other end is connected to the injection port; the outdoor side throttling device is installed on the refrigerant from the load side When the flow device flows to the heat source side heat exchanger, it is located more downstream than one end of the injection pipe; and the injection throttling device adjusts the amount of refrigerant flowing in the injection pipe, and also has the opening of the outdoor side throttling device. The control device of the degree and the opening degree of the injection throttling device.

Description

technical field [0001] The present invention relates to an air conditioner suitable for use in multi-type air conditioners for buildings and the like, for example. Background technique [0002] An air conditioner such as a multi-type air conditioner for a building has, for example, a refrigerant circuit that connects an outdoor unit (outdoor unit) that is a heat source unit placed outside the building and an indoor unit (indoor unit) placed inside the building via piping. . The air conditioner has a refrigerant circuit that circulates a refrigerant. In the refrigerant circuit, air is heated or cooled by heat radiation or heat absorption of the refrigerant, thereby heating or cooling the air-conditioning target space which is a load. [0003] For example, it is proposed to include a bypass expansion device, a refrigerant heat exchanger, an on-off valve, and an injection port of a compressor through an injection pipe that branches off a liquid pipe between a refrigerant heat...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F25B1/00F24F11/70F25B13/00F25B49/02
CPCF25B1/00F25B13/00F25B2313/005F25B2313/0233F25B2313/0231F25B2313/0253F25B2313/02741F25B2313/0311F25B41/31F25B41/40F25B49/02F25B2313/0315F25B2600/19F25B2600/2513
Inventor 鸠村杰
Owner MITSUBISHI ELECTRIC CORP