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CN-121993923-A - Refrigerating and heating device and method based on dissolution and precipitation heat

CN121993923ACN 121993923 ACN121993923 ACN 121993923ACN-121993923-A

Abstract

The invention provides a refrigerating and heating device and a refrigerating and heating method based on dissolving and precipitating heat. The container contains a solution, wherein the enthalpy of dissolution of the solute in the solution in the solvent is greater than 0. The pressure mechanism is provided on the container and is capable of pressurizing/depressurizing the solution in the container. The heat exchange pipeline comprises a cold heat exchange pipeline and a hot heat exchange pipeline, and the cold heat exchange pipeline and the hot heat exchange pipeline are connected with the container. The cold heat exchange pipeline and the container can form a cold circulation path, and the hot heat exchange pipeline and the container can form a hot circulation path. The refrigerating and heating device based on the dissolution and precipitation heat provided by the invention can not release substances with strong greenhouse effect into the atmosphere, and can eliminate the problem of high global warming potential caused by the use of fluorocarbon refrigerants such as chlorofluorocarbon, hydrochlorofluorocarbon, hydrofluorocarbon and the like.

Inventors

  • ZHOU RUNHUA

Assignees

  • 深圳制熵创新科技有限公司

Dates

Publication Date
20260508
Application Date
20260213

Claims (10)

  1. 1. Refrigerating and heating device based on dissolution and precipitation heat is characterized by comprising: a container containing a solution, wherein the enthalpy of dissolution of a solute in the solution when dissolved in the solvent is greater than 0; A pressure mechanism provided on the container for pressurizing/depressurizing the solution in the container; the heat exchange pipeline comprises a cold heat exchange pipeline and a hot heat exchange pipeline, wherein the cold heat exchange pipeline and the hot heat exchange pipeline are connected with the container, the cold heat exchange pipeline can form a cold circulation path with the container, and the hot heat exchange pipeline can form a hot circulation path with the container; A companion controller configured to: controlling the pressure mechanism to alternately and dynamically pressurize/depressurize the solution; The pressure mechanism pressurizes the solution, makes the solution rise to preset temperature through solute precipitation exothermic heat, and the heat is continuously released after opening the thermal circulation path, the pressure mechanism decompresses the solution, makes the solution reduce through solute dissolution endothermic heat, and the cold energy is continuously released after opening the cold circulation path.
  2. 2. The refrigeration and heating apparatus based on heat of dissolution and precipitation as claimed in claim 1, wherein the container includes a first liquid outlet pipe, a second liquid outlet pipe, a first liquid inlet pipe, and a second liquid inlet pipe; The hot heat exchange pipeline and the cold heat exchange pipeline are respectively provided with two ports, the two ports of the hot heat exchange pipeline are respectively communicated with the first liquid outlet pipe and the first liquid inlet pipe to form the thermal circulation path, and the two ports of the cold heat exchange pipeline are respectively communicated with the second liquid outlet pipe and the second liquid inlet pipe to form the cold circulation path.
  3. 3. The refrigeration and heating apparatus based on the heat of dissolution and precipitation as claimed in claim 2, wherein the refrigeration and heating apparatus based on the heat of dissolution and precipitation further comprises: the valve is arranged on the hot heat exchange pipeline and the cold heat exchange pipeline; The circulating pump is arranged on the hot heat exchange pipeline and the cold heat exchange pipeline; wherein the controller is configured to control opening and closing of the valve and the circulation pump.
  4. 4. A heat and cold storage device based on heat of dissolution and precipitation as claimed in claim 3, wherein the heat and cold storage device based on heat of dissolution and precipitation further comprises a temperature sensor arranged on the first liquid outlet pipe and the second liquid outlet pipe; wherein the controller is configured to control the valve and the circulation pump to be started when the temperature sensed by the temperature sensor reaches a preset temperature.
  5. 5. The refrigerating and heating device based on the dissolution and precipitation heat according to claim 2, wherein a plurality of containers are provided, and the corresponding pressure mechanisms are provided, wherein a first liquid outlet pipe of each container is communicated with the hot heat exchange pipeline through a first multi-way electromagnetic valve, and a second liquid outlet pipe of each container is communicated with the cold heat exchange pipeline through a second multi-way electromagnetic valve; wherein the controller is configured to: controlling at least one of the pressure mechanisms to pressurize or depressurize; And controlling the first multi-way electromagnetic valve to be conducted so that the solution in at least one container is input into the hot heat exchange pipeline, or controlling the second multi-way electromagnetic valve to be conducted so that the solution in at least one container is input into the cold heat exchange pipeline.
  6. 6. A heat and cold storage device based on heat of dissolution and precipitation as claimed in any one of claims 1 to 5, wherein a stirrer is provided in the container, the stirrer having a stirring portion immersed in the solution; The controller is configured to control the agitator to start.
  7. 7. A refrigerating and heating apparatus based on heat of dissolution and precipitation as claimed in any one of claims 1 to 5, wherein a pressure sensor is provided in the container; wherein the controller is configured to control the pressure mechanism to continue increasing pressure when the pressure sensor senses that the force applied by the pressure mechanism reaches a preset pressure value and the temperature of the solution does not reach a preset temperature value.
  8. 8. A refrigerating and heating apparatus based on heat of dissolution and precipitation as claimed in any one of claims 1 to 5, wherein a filter is provided in the container, the filter is provided at the junction of the heat exchange pipe and the container for filtering out precipitated solute crystals, and a replenishment port for solute and/or solution is provided in the container.
  9. 9. The refrigerating and heating apparatus based on heat of dissolution and precipitation as claimed in any one of claims 1 to 5, wherein the solute of the solution is at least one of monoammonium phosphate, urea, ammonium nitrate, ammonium chloride, potassium nitrate, ammonium thiocyanate, ammonium bicarbonate, anhydrous sodium acetate, sodium nitrate, sodium thiosulfate, ammonium sulfate, potassium chloride, ammonium bromide, ammonium iodide and ammonium perchlorate, and the solvent of the solution is at least one of water, N-dimethylformamide, dimethyl sulfoxide, benzene, toluene, carbon tetrachloride, hexane, methanol, ethanol and isopropanol.
  10. 10. The refrigerating and heating method based on the heat of dissolution and precipitation is characterized by being applied to the refrigerating and heating device according to any one of claims 1 to 9, wherein the refrigerating and heating method based on the heat of dissolution and precipitation comprises the following steps: Controlling a pressure mechanism to apply pressure to the solution in the container, and controlling the pressure mechanism to continuously pressurize according to a preset pressurizing speed when the temperature of the solution rises to a preset value, and simultaneously controlling the solution to be input into a heat exchange pipeline; when the pressure exerted by the pressure mechanism reaches the maximum value, the hot heat exchange pipeline is controlled to be closed, the pressure mechanism is controlled to unload the solution, and when the temperature of the solution is reduced to a preset value, the pressure mechanism is controlled to continuously decompress according to the preset decompression speed, and meanwhile, the solution is controlled to be input into the cold heat exchange pipeline.

Description

Refrigerating and heating device and method based on dissolution and precipitation heat Technical Field The invention belongs to the technical field of refrigerating and heating devices, and particularly relates to a refrigerating and heating device and a refrigerating and heating method based on dissolved and precipitated heat. Background The refrigerating and heating device is widely applied to a plurality of fields such as houses, commercial buildings, industrial production, food cold chains, transportation and the like. In the prior art, the main flow of the refrigerating and heating device still depends on the vapor compression cycle process of fluorocarbon refrigerant, and the refrigerant generates gas-liquid phase change in the system to realize the absorption and release of heat, thereby achieving the refrigerating or heating effect. However, the refrigeration and heating device of the fluorocarbon refrigerant vapor compression cycle has great negative influence on the ecological environment, such as chlorofluorocarbon, hydrochlorofluorocarbon and hydrofluorocarbon refrigerants all have extremely strong global warming potential, the global warming potential value of the refrigeration and heating device is usually thousands times higher than that of carbon dioxide, serious environmental problems are caused, and the refrigeration and heating device cannot meet the global low-carbon environment-friendly development requirement. Disclosure of Invention The embodiment of the invention provides a refrigerating and heating device and a refrigerating and heating method based on dissolving and precipitating heat, which aim to solve the problem that the existing refrigerating and heating device has great negative influence on the ecological environment due to the adoption of fluorocarbon refrigerant. In order to achieve the above purpose, the invention adopts the following technical scheme: in one aspect, there is provided a refrigerating and heating apparatus based on heat of dissolution and precipitation, comprising: a container containing a solution, wherein the enthalpy of dissolution of a solute in the solution when dissolved in the solvent is greater than 0; A pressure mechanism provided on the container for pressurizing/depressurizing the solution in the container; the heat exchange pipeline comprises a cold heat exchange pipeline and a hot heat exchange pipeline, wherein the cold heat exchange pipeline and the hot heat exchange pipeline are connected with the container, the cold heat exchange pipeline can form a cold circulation path with the container, and the hot heat exchange pipeline can form a hot circulation path with the container; A companion controller configured to: controlling the pressure mechanism to alternately and dynamically pressurize/depressurize the solution; The pressure mechanism pressurizes the solution, makes the solution rise to preset temperature through solute precipitation exothermic heat, and the heat is continuously released after opening the thermal circulation path, the pressure mechanism decompresses the solution, makes the solution reduce through solute dissolution endothermic heat, and the cold energy is continuously released after opening the cold circulation path. In one possible implementation, the container includes a first liquid outlet pipe, a second liquid outlet pipe, a first liquid inlet pipe, and a second liquid inlet pipe; The hot heat exchange pipeline and the cold heat exchange pipeline are respectively provided with two ports, the two ports of the hot heat exchange pipeline are respectively communicated with the first liquid outlet pipe and the first liquid inlet pipe to form the thermal circulation path, and the two ports of the cold heat exchange pipeline are respectively communicated with the second liquid outlet pipe and the second liquid inlet pipe to form the cold circulation path. In one possible implementation manner, the refrigerating and heating device based on the dissolution precipitation heat further comprises: the valve is arranged on the hot heat exchange pipeline and the cold heat exchange pipeline; The circulating pump is arranged on the hot heat exchange pipeline and the cold heat exchange pipeline; wherein the controller is configured to control opening and closing of the valve and the circulation pump. In one possible implementation manner, the refrigerating and heating device based on the dissolution precipitation heat further comprises a temperature sensor, wherein the temperature sensor is arranged on the first liquid outlet pipe and the second liquid outlet pipe; Wherein the control is configured to control the valve and the circulation pump to be started when the temperature sensed by the temperature sensor reaches a preset temperature. In one possible implementation manner, the containers are provided with a plurality of containers and are all provided with the corresponding pressure mechanisms, wherein a first liquid outlet pip