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Exhaust heat recovery air-conditioning device

A heat recovery and air technology, which is applied in refrigeration and liquefaction, climate sustainability, refrigeration safety arrangements, etc., can solve the problems of inability to recover heat, inability to effectively use heat exhausted by refrigeration devices, etc., and achieve the effect of improving the coefficient of performance

Active Publication Date: 2018-11-23
MITSUBISHI ELECTRIC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, although the exhaust heat recovery heat exchanger can recover the exhaust heat of the refrigeration device during the heating operation of the air conditioner, it cannot recover heat because high-pressure refrigerants pass through each other during the cooling operation.
In addition, when defrost operation occurs during heating operation, since the operation is generally controlled so that the refrigerant circulation direction is reversed, both the outdoor heat exchanger and the heat recovery heat exchanger of the air conditioner are at high pressure. On the side, there is a problem that the heat exhausted by the refrigeration unit cannot be effectively used in the defrosting operation

Method used

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  • Exhaust heat recovery air-conditioning device

Examples

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Embodiment approach 1

[0026] figure 1 It is a schematic circuit diagram showing the exhaust heat recovery type air conditioner according to the first embodiment. according to figure 1 , the equipment structure of the exhaust heat recovery type air conditioner 100a will be described.

[0027] (device structure)

[0028] The exhaust heat recovery type air conditioner 100a according to Embodiment 1 includes an air-conditioning side refrigerant circuit 30a and a cooling side refrigerant circuit 40a. In the air-conditioning side refrigerant circuit 30a, the first compressor 1, the first flow switching device 3, the outdoor heat exchanger 2, the first throttling device 7, the indoor heat exchanger 5, and the second flow switching device 4 The reagent piping is connected in sequence. In addition, in the air-conditioning side refrigerant circuit 30a, the exhaust heat recovery heat exchanger 6 is connected to the outdoor heat exchanger 2 and the indoor heat exchanger through the refrigerant piping branc...

Embodiment approach 2

[0071] Next, the exhaust heat recovery type air conditioner 100b in which the condenser 11 is omitted from the exhaust heat recovery type air conditioner 100a of Embodiment 1 will be described. Figure 9 It is a schematic circuit diagram showing the exhaust heat recovery type air conditioner according to the second embodiment. according to Figure 9 , the equipment structure of the exhaust heat recovery type air conditioner 100b will be described.

[0072] (device structure)

[0073]The exhaust heat recovery type air conditioner 100b according to this embodiment has an air-conditioning side refrigerant circuit 30b and a cooling side refrigerant circuit 40b. In the cooling-side refrigerant circuit 40b, the second compressor 10, the exhaust heat recovery heat exchanger 6, the cooling-side expansion device 13, and the cooler 12 are sequentially connected via refrigerant piping. Each constituent device of the refrigerant circuit is mounted on, for example, the outdoor unit 14b,...

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Abstract

This exhaust heat recovery air-conditioning device is equipped with: an air-conditioning-side refrigerant circuit (30a) which has a first compressor (1), a first flow path switching device (3), a second flow path switching device (4), and an exhaust heat recovery heat exchanger (6) that is connected in parallel to both of an outdoor heat exchanger (2) and an indoor heat exchanger (5); and a refrigeration-side refrigerant circuit (40a) which has a second compressor (10) and the exhaust heat recovery heat exchanger (6). The exhaust heat recovery heat exchanger (6) is connected to the suction side of the first compressor (1) through pipes. The first flow path switching device (3) connects the outdoor heat exchanger (2) to either the discharge side or the suction side of the first compressor (1) through pipes. The second flow path switching device (4) connects the indoor heat exchanger (5) to either the discharge side or the suction side of the first compressor (1) through pipes. This configuration allows the use of exhaust heat in any operation mode.

Description

technical field [0001] The present invention relates to an exhaust heat recovery type air conditioner that combines a refrigeration unit and an air conditioner to recover exhaust heat. Background technique [0002] In a conventional exhaust heat recovery type air conditioner, for example, a dual refrigerant circuit combining a refrigeration unit and an air conditioner may be used (for example, refer to Patent Document 1). In such an exhaust heat recovery type air conditioner, the exhaust heat recovery heat exchanger in which the evaporator of the air conditioner and the condenser of the refrigeration unit are arranged in parallel exchanges heat between the refrigerant of the air conditioner and the refrigerant of the refrigeration unit. , to realize the recovery of exhaust heat from the refrigeration unit. [0003] Patent Document 1: Japanese Patent Laid-Open No. 2000-179961 [0004] In the exhaust heat recovery type air conditioner of Patent Document 1, the exhaust heat r...

Claims

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Application Information

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IPC IPC(8): F25B7/00
CPCF25B7/00F25B13/00F25B49/02F25B2500/19F25B6/04F25B47/025F25B2313/009F25B2313/02732F25B2313/0314F25B2313/0315F25B2700/1931F25B2700/1933F25B2700/21151F25B2700/21152F25B2600/2513Y02P80/15F25B41/34Y02B30/70F25B47/022
Inventor 谷中信吾高田茂生竹中直史
Owner MITSUBISHI ELECTRIC CORP