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Heat pump air conditioner

a technology of heat pump and air conditioner, which is applied in the direction of lighting and heating apparatus, refrigeration components, heating types, etc., can solve the problems of uneven cooling/heating, uneven heating or cooling of air, etc., and achieve stable air conditioning, reduce uneven cooling/heating, and eliminate overshoot

Inactive Publication Date: 2016-01-28
KIMURA KOHKI CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The present invention relates to a heat pump air conditioner system that can efficiently cool or heat a space by using multiple heat pumps. This system can reduce energy waste by only operating one compressor when the air conditioning load is small. The system also uses elliptical-shaped heat transfer pipes that have low resistance to air flow, resulting in improved heat exchange efficiency and increased comfort and energy efficiency.

Problems solved by technology

In this case, when cooling / heating is performed by only one of the heat pumps, the cooling / heating is performed in an uneven manner utilizing only one part of the air-intake-side heat exchanger.
In this case, air passing through the air-intake-side heat exchanger is partly cooled down or heated up, and thereby unevenness occurs in the heating or cooling of the air.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

embodiment 1

[0041]The controller 8 includes a microprocessor and various sensors, for example. The controller 8 includes a memory as necessary. The controller 8 stores a reference value for an air-conditioning load applied to the heat pump air conditioner 200. The controller 8 compares the air-conditioning load applied to the heat pump air conditioner 200 with the reference value, switches the state of the first compressor 2a and the second compressor 2b between an operating state and an operation stopped state, and performs output adjustment. Specifically, if the air-conditioning load applied to the heat pump air conditioner 200 is less than the reference value, the controller 8 stops both the compressors 2a and 2b from operating.

[0042]If the load applied to the heat pump air conditioner 200 is higher than or equal to the reference value and is great, the controller 8 causes both the compressors 2a and 2b to operate, thereby causing the refrigerant to flow into all of the heat transfer pipes 1...

embodiment 2

[0044]If the load applied to the heat pump air conditioner 200 is higher than or equal to the reference value, the controller 8 may cause the first compressor 2a and the second compressor 2b to operate alternately. As a result, the refrigerant flows into the heat transfer pipes 12a and the heat transfer pipes 12b alternately. Specifically, while causing the first compressor 2a to operate, the controller 8 stops the second compressor 2b, thereby stopping the flow of the refrigerant in the second heat transfer pipes 12b, and while stopping the first compressor 2a, the controller 8 causes the second compressor 2b to operate, thereby causing the refrigerant to flow into the heat transfer pipes 12b. The order in which the first compressor 2a and the second compressor 2b are caused to operate alternately may be inverted during the operation. Further, the controller 8 may adopt an operation pattern in which the heat pumps 5a and 5b are sequentially caused, one by one, to start and stop. In...

embodiment 3

[0046]Alternatively, when causing the first compressor 2a and the second compressor 2b to operate alternately, the controller 8 totals either a previous operating time of each of the compressors 2a and 2b or the number of previously performed operations of each of the compressors 2a and 2b. The controller 8 may preferentially cause one of the compressors 2a and 2b with a less previous operating time or a less number of previously performed operations to operate, and may stop the other one of the compressors 2a and 2b with a more previous operating time or a more number of previously performed operations. In this manner, the operation frequency or operating time can be made uniform between the compressors 2a and 2b. This makes it possible to extend the life of the compressors 2a and 2b, and reduce the number of times to repair the compressors 2a and 2b due to breakdown.

[0047]The controller 8 may switch the state of the compressors 2a and 2b between an operating state and an operation...

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PUM

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Abstract

A heat pump air conditioner includes an intake side heat exchanger including heat transfer pipes passing a refrigerant and being arranged in a direction along an air inlet face, intake heat exchanger configured to cool or warm air and supply the air to a space. A plurality of heat pumps include a plurality of compressors and configured to compress the refrigerant and supply the compressed refrigerant to the heat transfer pipes and a plurality of heat side exchangers and connected to the respective compressors, the heat pumps sharing the air intake side heat exchanger, and a controller configured to switch a state of the compressors and between an operating state and an operation stopped state. The controller controls the compressors and to switch an operation of each of the compressors and between starting and stopping in accordance with a magnitude of an air-conditioning load.

Description

BACKGROUND OF THE INVENTION[0001]1. Field of the Invention[0002]The present invention relates to heat pump air conditioners.[0003]2. Description of the Related Art[0004]As described in Japanese Laid-Open Patent Application Publication No. H09-264614, a conventional heat pump air conditioner includes a compressor, an air-intake-side heat exchanger, and a heat-source-side heat exchanger. The compressor and heat exchangers form a heat pump, and are connected to each other by piping, such that a refrigerant circulates through these devices.[0005]Such a heat pump air conditioner is used throughout the year. In the description below, within one year, a period other than a high-temperature summer period and a low-temperature winter period is referred to as an intermediate period.[0006]In a conventional heat pump air conditioner, the higher the necessary cooling / heating capacity of the heat pump air conditioner, the higher the minimum critical power of the compressor. Therefore, the cooling...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): F25B13/00F25B7/00F25B49/02
CPCF25B13/00F25B49/02F25B7/00F24F5/001F24F13/30F24F2203/021F25B39/00F25B49/022F25B2313/023F25B2400/06F25B2500/26F25B2500/27
Inventor KIMURA, KEIICHIMORITA, MITSUO
Owner KIMURA KOHKI CO LTD
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