Heating and cooling unit, and heating and cooling apparatus
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Solution Overview
Problem
Conventional heating and cooling apparatuses, such as multi-air conditioners and fan coil units, suffer from high wind velocity causing drafts, temperature unevenness, and low efficiency, especially in poorly insulated or high thermal load areas, and require additional measures for dew condensation, which increases costs.
Innovation Solution
A heating and cooling unit that mixes feed air with circulated air from the room in a laminar flow manner using an elliptical heat storage pipe and flow dividing fins, reducing pressure loss and enhancing heat transfer, while eliminating the need for separate dew condensation measures by controlling the dew point through air pressure adjustments.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If conventional heating and cooling apparatuses (multi air conditioners or fan coil units) blow cold air or warm air directly to the room inside, then cooling or heating effect is achieved, but the wind velocity is too high causing drafts and temperature unevenness
Solution Approach 1:
The air outlet is divided into multiple small holes instead of a single large opening. This segments the high-velocity air stream into multiple low-velocity streams, reducing draft sensation while maintaining cooling effectiveness. The plate with multiple holes acts as a flow distributor that breaks up concentrated air flow.
Solution Approach 2:
Different regions of the air outlet have different hole distributions to create localized flow patterns. The plate structure allows different areas to emit air with appropriate velocities and directions, ensuring uniform temperature distribution while preventing drafts in occupied zones.
2Temperature
If radiation cooling or radiation heating is used, then comfortable temperature control is achieved, but the air conditioning efficiency is low and the range of use is limited
Solution Approach 1:
The invention combines radiation heating/cooling (through the plate radiating heat) with convection cooling (through the water-cooled plate structure) into a single integrated system. This hybrid approach maintains the comfort benefits of radiation while achieving higher efficiency through the added convection mechanism, expanding the applicable range to include spaces with poor thermal insulation or high thermal loads.
3Productivity
If feed air is supplied at high velocity to achieve quick cooling, then cooling efficiency improves, but temperature unevenness and drafts increase
Solution Approach 1:
The high-velocity feed air is segmented into multiple low-velocity streams through the multiple holes in the plate. This maintains the total cooling capacity (productivity) while distributing the air flow uniformly across the room, eliminating temperature unevenness and drafts.
4Reliability
If additional measures against dew condensation are provided, then dew condensation prevention is achieved, but cost increases
Solution Approach 1:
The water-cooled plate structure inherently controls the dew point temperature of the supplied air through the cooling water temperature regulation. This self-regulating mechanism prevents dew condensation without requiring additional heating elements or complex control systems, thereby preventing dew condensation while avoiding cost increase.
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
This solution achieves high efficiency and power in air conditioning, reduces drafts and temperature unevenness, expands the apparatus's usage range, and lowers operational costs by integrating dew point control and eliminating the need for additional condensation treatment equipment.
Implementation Method 1
a heat storage radiation member, which is attached in the mixer case in a thermally-conductive manner, for obtaining heat from the mixed air and radiating the heat to the room inside
Implementation Method 2
The heat storage radiation member obtains low heat or high heat from the mixed air and carries out radiation cooling or radiation heating to the room inside
Data Source
Figure 1~2
Figure 3~4
Figure 5
AI summary
To provide a heating and cooling unit and a heating and cooling apparatus in which high efficiency and high power are achieved, space unsuitable for air conditioning is less than air conditioning by the conventional radiation panel employing only heat emission as well as a draft and temperature unevenness are not provided, and measures against dew condensation countermeasure are unnecessary. In an induction emission air conditioning apparatus installed in a ceiling( C), it is provided within a casing (19) with a heat exchanger (20) through which a feed air introduced from an outdoor side passes, a fan (22) passing the feed air through the air conditioning heat exchanger (20), and a heating and cooling unit (1) for blowing a mixed air obtained by inducing and suctioning the air in the room inside by using the feed air passing through the heat exchanger (20) so as to mix with the feed air, into the room inside in a laminar manner, and emitting the heat of the mixed air to the room inside, integrally.