Air conditioning heat pump system using ejector, air conditioner, and air conditioner control method

Resolve Bottlenecks,
Find Innovative SolutionsGenerate Solutions

Solution Overview

Problem

Conventional air conditioning heat pump systems are inefficient in terms of energy consumption due to the compressor's high power requirements for compressing refrigerant, and they lack an effective mechanism to optimize performance across varying outdoor temperatures.

Innovation Solution

The air conditioning heat pump system incorporates an ejector, electromagnetic valves, and a controller to manage refrigerant flow, allowing for different operating modes, including a low-temperature heating mode where the ejector recovers expansion work, reducing compressor power consumption and optimizing performance across temperature variations.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Power

If a conventional compressor is used to compress refrigerant, then the refrigerant can be compressed from low temperature and pressure to high temperature and pressure, but the power consumption is high

Engineering Contradiction:

Improvecompressor powerVSAvoidpower consumption

Core Design Contradiction:

PowerVSUse of energy by moving object

Solution Approach 1:

The compression process is divided into two stages: a first compression stage that compresses refrigerant to intermediate pressure and temperature, and a second compression stage that further compresses to final high pressure and temperature. This segmentation allows each compressor to operate at lower power consumption levels while achieving the same overall compression effect

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

An intermediate heat exchanger serves as an intermediary component between the two compression stages. It cools the refrigerant after the first compression stage, reducing the temperature and pressure before entering the second compressor, thereby lowering the power consumption of the second compression stage

Inventive Principle:

Principle #24Intermediary (Mediator)

2Adaptability or versatility

If the outdoor temperature varies, then the system must adapt to different temperature conditions, but conventional systems lack an effective mechanism to optimize performance

Engineering Contradiction:

Improvetemperature adaptation capabilityVSAvoidperformance stability

Core Design Contradiction:

Adaptability or versatilityVSReliability

Solution Approach 1:

The system dynamically adjusts its operating mode based on outdoor temperature conditions. When outdoor temperature is above a predetermined threshold, it operates in cooling mode; when below the threshold, it switches to heating mode. This dynamic adaptation ensures optimal performance and reliability across varying temperature conditions

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The system changes its operational parameters (cooling vs. heating mode) based on the outdoor temperature parameter. This parameter-based control strategy allows the system to adapt to different temperature conditions while maintaining stable and reliable performance in each operating regime

Inventive Principle:

Principle #35Parameter changes

Applied Scientific Principles

This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.

Function Achieved in This Case

The system reduces power consumption by utilizing the ejector to recover expansion work and efficiently manage refrigerant flow, enhancing performance in both cooling and heating modes, especially during low outdoor temperatures.

Implementation Method 1

the ejector recovers expansion work

Methodology Applied

Scientific EffectPressure difference: Pressure Gradient

Implementation Method 2

incorporates an ejector, electromagnetic valves, and a controller to manage refrigerant flow

Methodology Applied

Scientific EffectEjector effect: Injector

Implementation Method 3

electromagnetic valves, and a controller to manage refrigerant flow

Methodology Applied

Scientific EffectElectromagnetic actuation: Electromagnet

Implementation Method 4

outdoor heat exchanger, and is then input to the indoor heat exchanger for evaporation and heat exchange

Methodology Applied

Scientific EffectHeat transfer: Heat Exchanger

Data Source

PatentUS11236926B2Air conditioning heat pump system using ejector, air conditioner, and air conditioner control method

Publication Date: 2022.02.01 QINGDAO HISENSE HITACHI AIR CONDITIONING SYST

AI summary

An air conditioning heat pump system using an ejector may include a compression assembly, an outdoor heat exchanger, an indoor heat exchanger, an ejector, and a first to third electromagnetic valve and a controller. A first end of the compression assembly may be connected with the one end of the outdoor heat exchanger, a second end may be connected with one end of the indoor heat exchanger, a third end may connected with outlet end of the ejector, and a fourth end may be connected with another end of the outdoor heat exchanger. One end of the outdoor heat exchanger may also be connected with a jet inlet of the ejector through the first electromagnetic valve, and another end may also be connected with the jet inlet of the ejector through the second electromagnetic valve and the third electromagnetic valve.