Phase change energy storage air conditioner or floor heating system
By embedding phase change materials in a sealed container and using a cooling medium to heat or cool during periods of low electricity prices, the problems of complex structure and high energy consumption in existing technologies are solved, achieving the effects of simplified structure, improved energy storage efficiency and reduced maintenance costs.
Patent Information
- Application Number
- CN202520207989.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-02-10
- Publication Date
- 2026-01-13
- Estimated Expiration
- 2035-02-10
AI Technical Summary
Existing phase change air conditioning and underfloor heating systems are complex in structure, large in size, and have high energy consumption. The phase change materials are easily damaged, and the maintenance and replenishment costs are high.
The device uses a sealed container with built-in phase change material. During periods of low electricity prices, the material is heated or cooled by a cold medium to induce a phase change. Temperature regulation can be achieved during the day without starting the outdoor air conditioning unit. The circulating pump and radiator exchange heat directly, simplifying the structure and improving energy storage efficiency.
It achieves a simple structure, small size, easy use, good energy storage effect, high cost performance, low loss of phase change material, and low maintenance cost.
Smart Images
Figure CN223795378U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to a kind of phase change energy storage air conditioners or floor heating systems. BACKGROUND
[0002] At present, air conditioning system or floor heating system has been widely used, and its use state is mostly refrigeration in summer and heating in winter. In order to save electricity, phase change air conditioner appears because of the large difference between the peak and valley of electricity price in daytime and night. It heats or cools the phase change material in the period of low electricity price to make it change phase to realize heat storage or cold storage, and then releases heat or absorbs heat in daytime to realize heating or cooling. The existing phase change air conditioner is provided with a phase change energy storage tank or a phase change module, and the phase change material in the tank or module needs to be immersed in refrigerant liquid or exchange heat with refrigerant liquid through pipeline, pump and valve. The structure is complex, large in size, high in energy consumption, inconvenient to use, reduces the effect of saving electricity, and the phase change material is easy to be consumed, increasing the cost of maintenance and supplement. SUMMARY
[0003] The utility model aims at the above-mentioned deficiencies of prior art, and provides a kind of phase change energy storage air conditioner or floor heating system. It is not only simple in structure, small in size, convenient to use, but also good in energy storage effect and high in cost performance.
[0004] In order to achieve the above-mentioned purpose, the utility model provides a kind of phase change energy storage air conditioner or floor heating system, which comprises an air conditioner outdoor unit and a buffer energy storage water tank. The air conditioner outdoor unit is provided with a compressor, a heat exchanger and a refrigerant. The buffer energy storage water tank is connected with a circulating pipeline. The circulating pipeline passes through the heat exchanger, and the circulating pipeline is provided with a heat exchanger pump. The utility model is characterized in that: one or more than one closed container is arranged in the buffer energy storage water tank, and the closed container is provided with phase change material.
[0005] The above-mentioned radiator can be a radiator coil, which is arranged under the floor to form a floor heating system.
[0006] The above-mentioned radiator can also be a coil fan to form an air conditioning system.
[0007] When the phase change temperature of the phase change material is higher than room temperature, the above-mentioned system can become a heating air conditioner or floor heating system. When the phase change temperature of the phase change material is lower than room temperature, the above-mentioned system can become a refrigeration air conditioner or floor heating system.
[0008] During use, the compressor and refrigerant heat or cool the cold medium in the buffer tank during the night when electricity prices are low. The cold medium then heats or cools the phase change material, causing it to undergo a phase change, thus achieving heat storage or cold storage. When temperature adjustment is needed during the day when electricity prices are high, there is no need to start the outdoor unit of the air conditioner. The phase change material automatically releases heat or uses low temperature to heat or cool the cold medium, and the circulation pump starts to circulate the cold medium into the heat exchanger to achieve the purpose of indoor temperature adjustment.
[0009] The sealed container and phase change material of this invention are placed in a cold medium, and the two exchange heat directly. It is not only simple in structure, small in size, and easy to use, but also does not require driving the cold medium. It has good energy storage performance and high cost-effectiveness.
[0010] As a further improvement of this utility model, the cold medium is provided with several sealed containers arranged at uniform intervals, and the sealed containers are all made of thermally conductive metal or thermally conductive PP plastic; a larger amount of phase change material can increase the heat storage or cold storage capacity and ensure the heat exchange efficiency between the phase change material and the cold medium.
[0011] As a further improvement of this utility model, there are two or more radiators, and each radiator is equipped with a solenoid valve at the end connected to the water outlet pipe; the cold medium in the buffer tank can exchange heat with multiple radiators at the same time, thereby improving the efficiency of use.
[0012] As a further improvement of this utility model, the buffer water tank is connected to a water supply pipe, and a valve is provided on the water supply pipe; this facilitates the replenishment of the buffer water tank with a cooling medium.
[0013] In summary, this utility model is not only simple in structure, small in size, and easy to use, but also has good energy storage effect and high cost performance. Attached Figure Description
[0014] Figure 1 This is a structural diagram of Embodiment 1 of the present utility model.
[0015] Figure 2 This is a structural diagram of Embodiment 2 of the present invention. Detailed Implementation
[0016] The present invention will now be described in further detail with reference to the accompanying drawings.
[0017] Example 1
[0018] like Figure 1As shown, this embodiment of a phase change energy storage air conditioning system includes an outdoor unit 1 and a buffer energy storage tank 2. The outdoor unit 1 contains a compressor, a heat exchanger 4, and a refrigerant. The buffer energy storage tank 2 is connected to a circulation pipe 3, which passes through the heat exchanger 4 and is equipped with a heat exchange pump 11. The buffer water tank 2 contains water as a cooling medium. Several sealed containers 6 are provided in the buffer energy storage tank 2, and the sealed containers 6 are evenly spaced and made of metal thermally conductive material. The sealed container 6 contains phase change material; the buffer tank 2 is connected to the outlet pipe 7 and the return pipe 8; both ends of the three coil fans 9 are connected to the outlet pipe 7 and the return pipe 8; each coil fan 9 is equipped with a solenoid valve 10 at the end connected to the outlet pipe 7; the three coil fans 9 (i.e., heat dissipation coil + fan) are placed in different rooms to form an air conditioning system; a circulation pump 5 is installed on the outlet pipe 7; the buffer tank 2 is connected to the water supply pipe 12, and the water supply pipe 12 is equipped with a valve 13;
[0019] If the phase change material in the sealed container 6 is paraffin or sodium acetate trihydrate with a high carbon number, its phase change temperature is about 60°C, which is higher than room temperature, then the above system becomes a heating air conditioning system; if the phase change material is polyethylene glycol, sodium sulfate decahydrate, or certain gels, its phase change temperature is about 10°C, which is lower than room temperature, then the above system becomes a cooling air conditioning system.
[0020] When in use, the compressor is started at night when electricity prices are low. The refrigerant heats or cools the water in the buffer tank 2 through the heat exchanger 4. The water then heats or cools the phase change material in each sealed container 6, causing it to undergo a phase change, thus achieving heat storage or cold storage. When temperature adjustment is required during the day when electricity prices are high, there is no need to start the outdoor unit 1 of the air conditioner. The phase change material automatically releases heat or heats or cools the water at low temperature, starts the circulation pump 5, and opens the corresponding solenoid valve 10, so that the temperature-adjusted water is circulated into the corresponding coil fan 9 to achieve circulating heating, thereby achieving the purpose of corresponding indoor temperature adjustment.
[0021] Since the sealed container 6 and the phase change material are placed in water, they exchange heat directly without the need for driving water. This not only makes the structure simple, small in size and easy to use, but also ensures that the phase change material does not need to be driven by water during heat exchange, resulting in good energy storage performance and high cost-effectiveness. In addition, the water and the phase change material are isolated from each other, resulting in low loss of the phase change material, which can reduce maintenance and lower costs.
[0022] The amount of phase change material is directly proportional to the amount of energy stored. More phase change material can increase the heat storage or cold storage capacity. The sealed container 6 is made of metal thermally conductive material and is arranged at uniform intervals to ensure the heat exchange efficiency between the phase change material and water.
[0023] The valve 13 facilitates the replenishment of water to the buffer tank 2;
[0024] Example 2
[0025] like Figure 2As shown, this embodiment of a phase change energy storage underfloor heating system includes an air conditioner outdoor unit 1 and a buffer energy storage tank 2. The air conditioner outdoor unit 1 is equipped with a compressor, a heat exchanger 4, and a refrigerant. The buffer energy storage tank 2 is connected to a circulation pipe 3, which passes through the heat exchanger 4 and is equipped with a heat exchange pump 11. The buffer water tank 2 contains water as a cooling medium. Several sealed containers 6 are provided in the buffer energy storage tank 2. The sealed containers 6 are evenly spaced and made of thermally conductive PP plastic. Each sealed container 6 contains a phase change material. The buffer water tank 2 is connected to an outlet pipe 7 and a return pipe 8. Both ends of two heat exchange coils 16 are connected to the outlet pipe 7 and the return pipe 8. Each heat exchange coil 16 is equipped with a solenoid valve 10 at the end connected to the outlet pipe 7. The two heat exchange coils 16 are placed under the floor of different rooms to form an underfloor heating system. A circulation pump 5 is provided on the outlet pipe 7. The buffer water tank 2 is connected to a water supply pipe 12, which is equipped with a valve 13.
[0026] The temperature regulation method in this embodiment is the same as in embodiment one. Since the underfloor heating system is mostly used for heating, its phase change material is paraffin, which has a phase change temperature higher than room temperature.
[0027] This utility model is not limited to the above-described embodiments. For example, the circulating pump can be installed on the return water pipe, and the number of radiators can be adjusted to suit different working conditions.
Claims
1. A phase change energy storage air conditioning or underfloor heating system, comprising an outdoor unit and a buffer energy storage tank, wherein the outdoor unit contains a compressor, a heat exchanger, and a refrigerant, and the buffer energy storage tank is connected to a circulation pipeline, the circulation pipeline passing through the heat exchanger, and a heat exchange pump is installed on the circulation pipeline; characterized in that: The buffer storage tank contains one or more sealed containers, each containing phase change material; the buffer tank is connected to an outlet pipe and a return pipe, and both ends of one or more radiators are connected to the outlet pipe and the return pipe; a circulation pump is installed on the outlet pipe or the return pipe.
2. The phase change energy storage air conditioning or underfloor heating system according to claim 1, characterized in that: The radiator is a heat sink coil, which is placed under the floor.
3. A phase change energy storage air conditioning or underfloor heating system according to claim 1, characterized in that: The radiator is a coil fan.
4. A phase change energy storage air conditioning or floor heating system according to any one of claims 1 to 3, characterized in that: The buffer energy storage tank is equipped with several sealed containers that are evenly spaced apart. The sealed containers are all made of thermally conductive metal or thermally conductive PP plastic.
5. A phase change energy storage air conditioning or underfloor heating system according to claim 4, characterized in that: There are two or more radiators, and each radiator is equipped with a solenoid valve at the end where it is connected to the water outlet pipe.
6. A phase change energy storage air conditioning or underfloor heating system according to claim 5, characterized in that: The buffer water tank is connected to a water supply pipe, and a valve is installed on the water supply pipe.