Heat Pump Discharge Muffler Placement to Reduce Vibration and Heat Loss
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Solution Overview
Problem
Conventional heat pump devices experience vibration and noise due to pressure pulsation from the compression mechanism, which can lead to a decline in heating efficiency.
Innovation Solution
Incorporating a discharge muffler positioned between the shell housing the compression mechanism and the first heat exchanger, which reduces pressure pulsation and noise by allowing the high-pressure refrigerant to dissipate its pulsation before entering the heat exchanger, thereby minimizing heat loss and maintaining heating efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the refrigerant is directly discharged from the compression mechanism to the heat exchanger, then the device structure is simple, but vibration and noise occur due to pressure pulsation
Solution Approach 1:
A discharge muffler is introduced as an intermediary component between the compression mechanism and the heat exchanger. The muffler receives pulsating high-pressure refrigerant from the compression mechanism and releases it to the heat exchanger, thereby mediating the harmful pressure pulsation and reducing vibration and noise while maintaining a relatively simple device structure
2Volume of stationary object
If the discharge muffler is positioned inside the shell, then the device structure is compact, but heat loss occurs reducing heating efficiency
Solution Approach 1:
The discharge muffler is extracted from the interior of the shell and positioned outside, specifically in the space between the shell and the heat exchanger. This extraction prevents the muffler from causing heat loss to the shell while maintaining compact overall device dimensions, thereby preserving heating efficiency
3Object-affected harmful factors
If the discharge muffler is positioned far from the heat exchanger, then vibration and noise are reduced, but the device occupies more space
Solution Approach 1:
The discharge muffler is positioned in the spatial dimension between the shell and the heat exchanger, utilizing the available three-dimensional space rather than extending the linear distance. This dimensional placement reduces vibration and noise while maintaining compact device footprint
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 solution effectively reduces vibration and noise while maintaining heating efficiency by dissipating pressure pulsation outside the shell, ensuring that the refrigerant enters the heat exchanger with reduced pressure, thus enhancing the overall performance of the heat pump device.
Implementation Method 1
a discharge muffler being outside of the shell... The discharge muffler is at least partially located in a space between the shell and the first heat exchanger
Implementation Method 2
a first heat exchanger including a refrigerant inlet, the first heat exchanger being configured to exchange heat between the refrigerant and a heating medium
Data Source
AI summary
A heat pump device includes a compressor, a motor, a shell, a muffler, a heat exchanger, a housing, a blower, a first insulating material, and a second insulating material. The compressor compresses refrigerant. The motor drives the compressor. The shell houses the motor and the compressor. The compressor is connected to the muffler, which is further connected to heat exchanger. The housing has first and second spaces. The shell, the heat exchanger, and the muffler are disposed in the first space. The blower is disposed in the second space. The muffler is entirely located within a space between the shell and the first heat exchanger. The first insulating material at least partially cover the discharge muffler and the first heat exchanger. The second insulating material at least partially cover the shell. The first insulating material has a higher thermal resistance than the second insulating material.