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CN-121977255-A - Phase-change heat accumulating type cold and warm air conditioner

CN121977255ACN 121977255 ACN121977255 ACN 121977255ACN-121977255-A

Abstract

The invention discloses a phase-change heat accumulating type air conditioner, which belongs to a phase-change material application mode and comprises a cabinet body, wherein an electric heating unit and a heat exchange fan are arranged at the lower part of the cabinet body, an air outlet end of the heat exchange fan corresponds to a phase-change module bin, a plurality of air outlet holes are formed in the side part of the phase-change module bin, an air inlet hole is arranged at the lower part of the cabinet body and corresponds to the air inlet end of the heat exchange fan, the electric heating unit is in thermal contact with a heating module in the phase-change module bin, the heating module and a cooling module are respectively arranged in the cabinet body, and phase-change materials with different formulas are filled in the heating module and the cooling module, so that different latent heat of different compound phase-change materials, different temperature intervals for heat accumulation and different thermal reaction time can be utilized, different requirements of indoor heating and cooling can be met under the assistance of the electric heating unit and the heat exchange fan, the use cost is low, and meanwhile the heating module in a valley electric period can be utilized for heat accumulation, and the indoor heating cost is further reduced.

Inventors

  • LEI XIANZHANG
  • HUANG XINMIAO
  • XIAO YAN
  • LAN TIAN

Assignees

  • 成都相变科技有限公司

Dates

Publication Date
20260505
Application Date
20260209

Claims (6)

  1. 1. The phase-change heat accumulating type air conditioner comprises a cabinet body (1) and is characterized in that an electric heating unit and a heat exchange fan (2) are arranged at the lower part of the cabinet body (1), the air outlet end of the heat exchange fan (2) corresponds to a phase-change module bin (3), a plurality of air outlet holes are formed in the side part of the phase-change module bin (3), an air inlet hole is arranged at the lower part of the cabinet body (1), and corresponds to the air inlet end of the heat exchange fan (2), and the electric heating unit is in thermal contact with a heating module (4) in the phase-change module bin (3); The phase change module bin (3) is internally provided with a plurality of heating modules (4) and a plurality of cooling modules (5), wherein the cooling modules (5) are all arranged at the upper part of the heating modules (4), the cooling modules (5) are all in contact with cooling fins, the cooling fins are arranged in the phase change module bin (3), an air flow channel is formed in the phase change module bin (3) through a guide plate, and the air flow channel is used for enabling air flow formed by the heat exchange fan (2) to be in contact with the heating modules (4) and the cooling modules (5); The heating module (4) comprises a metal shell, wherein a heating phase-change material is filled in the metal shell, and comprises, by mass, 78% -83% of n-hexadecane, 8% -12% of expanded graphite, 4% -6% of polyvinyl alcohol and 4% -6% of nano silicon dioxide; The cooling module (5) comprises a metal shell, wherein the metal shell is filled with a cooling phase change material, and the cooling phase change material comprises, by mass, 70% -80% of paraffin, 8% -12% of graphene nano-sheets, 8% -12% of stearic acid and 4% -6% of nano-alumina.
  2. 2. The phase-change heat accumulating type air conditioner according to claim 1, wherein the electric heating unit comprises a ceramic electric heater (6) and a heat pipe heat exchanger (7), the heat pipe heat exchanger (7) is passed by a circulating heat exchange pipeline (8), the circulating heat exchange pipeline (8) also sequentially passes through and contacts a plurality of heating modules (4), the ceramic electric heater (6) is contacted with the heat pipe heat exchanger (7) for heating the heat pipe heat exchanger (7), and heat is further conveyed to the heating modules (4) by a heat exchange medium flowing in the circulating heat exchange pipeline (8); and a circulating pump (9) is further arranged on the circulating heat exchange pipeline (8), and the circulating pump (9) is used for enabling a heat exchange medium to circularly flow in the circulating heat exchange pipeline (8).
  3. 3. The phase-change heat accumulating type air conditioner according to claim 2, wherein the ceramic electric heater (6), the circulating pump (9) and the heat exchanging fan (2) are connected to a control module, and the control module is used for controlling the start and stop and the output power of the ceramic electric heater (6), the circulating pump (9) and the heat exchanging fan (2) according to the temperature value fed back by the sensor or the set temperature value, and executing an air conditioning mode; the air conditioning module comprises a cooling mode, a heating mode and a heat storage mode; when in the cooling mode, the heat exchange fan (2) operates, and the ceramic electric heater (6) and the circulating pump (9) stop operating; in the heating mode, the heat exchange fan (2), the ceramic electric heater (6) and the circulating pump (9) are all operated; in the heat storage mode, the ceramic electric heater (6) and the circulating pump (9) operate, and the heat exchange fan (2) stops operating.
  4. 4. The phase-change heat accumulating type air conditioner of claim 1, wherein a plurality of transverse row slots (10) are arranged in the phase-change module bin (3), heating modules (4) and cooling modules (5) are longitudinally inserted in the row slots (10), and gaps are reserved between adjacent heating modules (4) or functional modules.
  5. 5. The phase-change heat accumulating type air conditioner of claim 1, wherein the heating phase-change material is prepared by the following method: weighing raw materials, adding paraffin into a constant-temperature water bath kettle for melting, adding graphene nanosheets, performing ultrasonic dispersion for unit time, continuously adding stearic acid and nano alumina, and uniformly stirring to obtain the heating phase change material; Pouring the heating phase-change material into a metal shell, cooling, vacuum drying and packaging to obtain the heating module (4); The paraffin wax is a mixture of C25-C30.
  6. 6. The phase-change heat accumulating type air conditioner according to claim 1 or 5, wherein the cooling phase-change material is prepared by the following method: adding the raw materials into a constant-temperature water bath kettle to melt, stirring uniformly to be liquid, slowly adding the expanded graphite, continuing stirring in the adding process until the adding is finished and stirring uniformly is finished; and pouring the cooling phase change material into a metal shell, cooling, vacuum drying and packaging to obtain the cooling module (5).

Description

Phase-change heat accumulating type cold and warm air conditioner Technical Field The invention relates to a mode of applying phase-change materials, in particular to a phase-change heat accumulating type cold and warm air conditioner. Background With the rapid increase of global energy consumption and the increasingly strict environmental protection requirements, the energy efficiency improvement and low-carbon operation of an air conditioning system become a core issue in the technical field of energy. The phase change material has excellent heat energy storage capacity because of being capable of absorbing or releasing a large amount of latent heat in the solid-liquid or solid-solid phase change process, and is widely applied to the fields of building energy conservation, industrial waste heat recovery, battery heat management, renewable energy utilization and the like. However, the existing air conditioning system based on the phase change material has various defects in practical application, and the popularization of the air conditioning system are limited. First, functional singleness is a major bottleneck in the current technology. Many phase change heat storage systems are designed only for a single scene, for example, part of the systems are specially optimized for cooling in summer, and cold energy is stored by using low-temperature phase change materials, but cannot effectively work in a winter heating scene, whereas part of the heating systems are difficult to adapt to the cooling requirement. This limitation of functionality results in inefficient use of the device throughout the year in different seasons, failing to meet the needs of the user for dual functions of cooling and heating. Secondly, the selection of phase change materials and the lack of optimization of thermal conductivity become key factors limiting system performance. In the existing research, the thermal conductivity of part of phase-change materials is low, the heat storage and release rates are low, the indoor temperature regulation requirement is difficult to quickly respond, in addition, the long-term thermal stability and the cycle reliability of the materials are challenging, and the service life and the operation effect of equipment are influenced. Disclosure of Invention One of the purposes of the present invention is to provide a phase-change heat-accumulating type air conditioner to solve the technical problems that the similar air conditioning system in the prior art has single function and large use limitation, and the heat accumulation and heat release of the phase-change material cannot meet the indoor temperature regulation requirement. In order to solve the technical problems, the invention adopts the following technical scheme: The invention provides a phase-change heat accumulating type cold and warm air conditioner which comprises a cabinet body and is characterized in that an electric heating unit and a heat exchange fan are arranged at the lower part of the cabinet body, the air outlet end of the heat exchange fan corresponds to a phase-change module bin, and a plurality of air outlet holes are formed in the side part of the phase-change module bin; the heat exchange cabinet comprises a cabinet body, wherein an air inlet is arranged at the lower part of the cabinet body, the air inlet corresponds to an air inlet end of a heat exchange fan, an electric heating unit is in thermal contact with a heating module in a phase change module bin, a plurality of heating modules and a plurality of cooling modules are arranged in the phase change module bin, the cooling modules are all arranged at the upper part of the heating module, the cooling modules are all in contact with cooling fins, the cooling fins are arranged in the phase change module bin, an air flow channel is formed in the phase change module bin through a flow guide plate, the air flow channel is used for enabling air flow formed by the heat exchange fan to be in contact with the heating module and the cooling modules, the heating module comprises a metal shell, heating phase change materials are filled in the metal shell, the heating phase change materials comprise, by mass percent, 78% -83% of n-hexadecane, 8% -12% of expanded graphite, 4% -6% of polyvinyl alcohol and 4% -6% of nano silicon dioxide, the cooling modules comprise a metal shell, the cooling materials are filled in the metal shell, the cooling materials comprise, by mass percent 70% -80% of paraffin, 12% -12% of graphite, 8% -12% of nano-phase change materials and 8% -6% of stearic acid are filled in the metal shell. Preferably, the electric heating unit comprises a ceramic electric heater and a heat pipe heat exchanger, wherein the heat pipe heat exchanger is passed through by a circulating heat exchange pipeline, the circulating heat exchange pipeline also sequentially passes through and contacts with a plurality of heating modules, the ceramic electric heater is contacted with the hea