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air conditioner

An air-conditioning and refrigerant technology, applied in air-conditioning systems, gas cycle refrigerators, space heating and ventilation, etc., can solve problems such as inability to obtain heat exchange efficiency, and achieve the effect of reducing input and high thermal efficiency

Active Publication Date: 2016-06-15
MITSUBISHI ELECTRIC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] However, in the air-conditioning apparatus described in Patent Document 1, the direction of the heat source-side refrigerant flowing through the intermediate heat exchanger is changed according to the operation mode, but the flow direction of the use-side refrigerant is constant. In the intermediate heat exchanger, there is a problem that appropriate heat exchange efficiency cannot be obtained, and optimal operation cannot be performed in all operation modes.

Method used

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Experimental program
Comparison scheme
Effect test

Embodiment approach 1

[0034] (Structure of air conditioning unit)

[0035] figure 1 It is a configuration diagram of the air-conditioning apparatus according to Embodiment 1 of the present invention, and is a diagram showing the flow of refrigerant during cooling operation, figure 2 It is a configuration diagram of the same air-conditioning apparatus, and is a diagram showing the flow of refrigerant during heating operation. figure 1 and figure 2 Arrows indicated by thick lines among the arrows indicated by , indicate the flow of the primary-side refrigerant, and arrows indicated by thin lines indicate the flow of the secondary-side refrigerant.

[0036] The air-conditioning apparatus of the present embodiment is constituted by two refrigerant circuits of a primary side refrigerant circuit and a secondary side refrigerant circuit.

[0037] Among them, as the primary refrigerant circulating in the primary refrigerant circuit, for example, Freon refrigerants such as R410A, hydrocarbon refrigeran...

Embodiment approach 2

[0095] (Structure of air conditioning unit)

[0096] Figure 7 It is a block diagram of the air-conditioning apparatus of Embodiment 2 of this invention.

[0097] In the air conditioner of the present embodiment, the operation mode of each indoor unit can be freely selected by using the primary refrigerant circuit through which the primary refrigerant flows and the secondary refrigerant circuit through which the secondary refrigerant flows. Cooling action or heating action.

[0098] Such as Figure 7 As shown, the air-conditioning apparatus of the present embodiment is constituted by two refrigerant circuits, a primary side refrigerant circuit and a secondary side refrigerant circuit, as in the first embodiment. Among them, as the primary refrigerant circulating in the primary refrigerant circuit, for example, Freon-based refrigerants such as R410A, hydrocarbon-based refrigerants such as propane, natural refrigerants such as carbon dioxide, and the like are used. In additi...

Embodiment approach 3

[0176] About the air-conditioning apparatus of this Embodiment, it demonstrates centering on the difference from the air-conditioning apparatus of Embodiment 2. FIG.

[0177] (Structure of air conditioning unit)

[0178] Figure 12 It is a block diagram of the air-conditioning apparatus of Embodiment 3 of this invention.

[0179] Such as Figure 12 As shown, the outdoor unit A has a compressor 103, an outdoor heat exchanger 104, a four-way valve 106, and a flow path switching unit 141 composed of check valves 113a to 113d.

[0180] The flow switching unit 141 composed of the check valves 113a to 113d has a function of making the flow direction of the primary side refrigerant flowing in the refrigerant piping connecting the outdoor unit A and the relay unit B in a constant direction as described below. The check valve 113a is provided on the refrigerant piping connecting the four-way valve 106 and the valves 111c and 111d, and allows the primary-side refrigerant to flow only i...

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PUM

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Abstract

The present invention provides an air conditioning device that ensures high heat exchange efficiency even if the direction of the heat source side refrigerant (secondary side refrigerant) flowing in an intermediate heat exchanger changes, and can ensure high heat exchange efficiency in any operating mode. perform proper operation. The primary-side refrigerant in the gas-liquid two-phase state flowing into the intermediate heat exchanger (107a, 107b) absorbs heat from the secondary-side refrigerant flowing in counter-current, evaporates, and becomes a low-temperature and low-pressure gas state.

Description

technical field [0001] The present invention relates to an air-conditioning apparatus having two refrigerant circuits, a primary refrigerant circuit and a secondary refrigerant circuit, in which heat is exchanged between the primary refrigerant and the secondary refrigerant in an intermediate heat exchanger. Background technique [0002] As a conventional air conditioner, an air conditioner capable of simultaneous cooling and heating operation has been proposed, which "has a heat source side refrigerant circuit A and a utilization side refrigerant circuit Bn, the heat source side refrigerant circuit A having a compression The machine 11, the outdoor heat exchanger 13, the first refrigerant branch part 21 connected to the compressor 11, the second refrigerant branch part 22 and the third refrigerant branch part 23 connected to the outdoor heat exchanger 13 are arranged in the branch One of the first refrigerant flow control devices 24 between the pipe 40 and the second refrig...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F24F11/02F24F5/00F25B1/00
CPCF25B9/008F25B2309/06F25B2313/003F25B2313/006F25B2313/0233F25B2313/0272F25B2400/121F25B2313/0231F25B13/00
Inventor 田村麻子竹中直史若本慎一吉村寿守务山下浩司
Owner MITSUBISHI ELECTRIC CORP