Phase change energy storage heat spreader

Abstract

The utility model relates to phase change energy storage type radiator. Phase change energy storage type radiator, including heat exchange casing, the heat exchange casing has the inner chamber and is connected with condensing pipe and evaporative pipe, the inner chamber includes a plurality of condensing cavity and evaporative cavity of side -by -side interval arrangement, condensing cavity lower extreme and evaporative cavity lower extreme intercommunication, condensing cavity top connects condensing pipe, evaporative cavity top connects evaporative pipe, be equipped with the liquid storage tank in the heat exchange casing, condensing cavity side wall upper end is equipped with the connecting groove with condensing cavity intercommunication, the liquid storage tank bottom is equipped with the backflow tank that extends downward and is connected with evaporative cavity lower part intercommunication, be equipped with the valve between the liquid storage tank and backflow tank, when the liquid level in the liquid storage tank reaches the set position, the valve opens to make the liquid storage tank and backflow tank intercommunication. The utility model has the advantage that can avoid the negative influence of the thermal expansion and cold contraction of refrigerant on phase change efficiency as far as possible, can guarantee system use stability.

Description

Technical Field

[0001] This utility model relates to a phase change energy storage radiator. Background Technology

[0002] Traditional latent heat radiators rely on the refrigerant's evaporation-condensation cycle. Under high power or variable operating conditions, the evaporation and condensation processes of the refrigerant switch frequently. The thermal expansion and contraction of the refrigerant causes pressure fluctuations, disrupting the balance between saturation temperature and pressure. This prevents the refrigerant from undergoing phase change at its optimal saturation state, affecting phase change efficiency and thus reducing latent heat exchange efficiency, and may even lead to leaks. Traditional latent heat radiators rely on overall structural elasticity or reserved air chambers, but frequent pressure fluctuations cause repeated stress on the materials, resulting in mechanical fatigue. After long-term operation, cracks or failures may occur, reducing equipment reliability. The presence of non-condensable gases (such as air) within the air chambers occupies effective condensation space, reducing the effective heat exchange area within the condenser, weakening latent heat release capacity, and causing decreased stability. Utility Model Content

[0003] The purpose of this invention is to provide a radiator that can minimize the impact of thermal expansion and contraction of the refrigerant on the phase change efficiency.

[0004] To achieve the above objectives, this utility model employs a phase change energy storage radiator, including a heat exchange shell. The heat exchange shell has an inner cavity and is connected to a condenser tube and an evaporator tube. The inner cavity includes several condenser chambers and evaporator chambers arranged side by side at intervals. The lower end of the condenser chamber is connected to the lower end of the evaporator chamber. The top of the condenser chamber is connected to a condenser tube, and the top of the evaporator chamber is connected to an evaporator tube. A liquid storage tank is provided inside the heat exchange shell. The upper end of the side wall of the condenser chamber is provided with a connecting groove that communicates with the liquid storage tank. The bottom of the liquid storage tank is provided with a reflux groove that extends downward and communicates with the lower part of the evaporator chamber. A valve is provided between the liquid storage tank and the reflux groove. When the liquid level in the liquid storage tank reaches a set position, the valve opens to connect the liquid storage tank and the reflux groove.

[0005] When the system heats up and refrigerant evaporation intensifies, the internal cavity pressure increases, pushing the liquid refrigerant to move. The liquid refrigerant enters the storage tank (located at a higher position) through the connecting groove, temporarily storing excess liquid. At this time, the storage tank absorbs the increased liquid volume due to thermal expansion, without relying on the elastic deformation of the shell. When the system cools down and condensation intensifies, the internal cavity pressure decreases, and the liquid level in the storage tank rises to a set height, triggering the valve to open. Under the action of gravity, the liquid refrigerant automatically flows back to the lower part of the evaporation chamber through the return groove to participate in the next round of evaporation cycle. This utility model, by setting up a storage tank to absorb liquid refrigerant, does not require the shell to have deformation capabilities or a gas cavity, and avoids negative effects such as mechanical fatigue, ensuring system stability and phase change efficiency.

[0006] The condensing chamber and the evaporating chamber are arranged side by side with intervals, and are only connected at the lower end. The liquid storage tank is also only connected to the upper end of the condensing chamber, which realizes the physical isolation between the liquid storage tank and the main heat exchange area, ensuring that only liquid refrigerant remains at the evaporating end and improving boiling efficiency.

[0007] The condenser tube is connected to the top of the heat exchange shell, so that the bottom of the liquid storage tank is lower than the inlet of the heat exchange shell, allowing gravity-assisted refrigerant reflux. The valve can be any type of valve that opens once the liquid reaches a set position, such as a float valve.

[0008] Preferably, the liquid storage tank is equipped with a baffle mesh with fine perforations. One end of the baffle mesh is located below the outlet of the connecting tank, and the baffle mesh divides the liquid storage tank into a first part connected to the connecting tank and a second part connected to the reflux tank. The baffle mesh can be made of dense and corrosion-resistant 200-mesh stainless steel wire mesh, used for collision separation of the gas-liquid mixture.

[0009] Preferably, the connecting groove is inclined, with the end of the connecting groove near the condenser cavity higher than the end near the liquid storage tank. This arrangement facilitates the refrigerant's entry from the condenser cavity into the liquid storage tank by inertia.

[0010] Preferably, the inclination angle of the connecting groove is 30°-60°. By reasonably adjusting the angle and cross-sectional size of the diversion orifice, the flow velocity of the refrigerant at the inlet of the storage tank is ensured to be <0.2m / s, thereby reducing gas entrainment.

[0011] Preferably, the connecting groove is lined with copper fiber felt. Copper fiber felt with a porosity of 80% can be selected to enhance liquid phase adsorption.

[0012] Preferably, the inner wall of the liquid storage tank is provided with a hydrophobic coating. The hydrophobic coating is provided to prevent liquid phase adhesion, and the hydrophobic coating may be made of polytetrafluoroethylene.

[0013] Preferably, the heat exchange shell is provided with a transparent observation window at the location corresponding to the liquid storage tank. This feature facilitates testing before the product leaves the factory and allows testing personnel to observe the contents.

[0014] This invention has the advantage of minimizing the negative impact of thermal expansion and contraction of the refrigerant on phase change efficiency, thus ensuring the stability of the system. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of this utility model.

[0016] Figure 2 This is an enlarged view of the liquid storage tank of this utility model. Detailed Implementation

[0017] The present invention will now be further described with reference to the accompanying drawings and specific embodiments.

[0018] Depend on Figure 1 and Figure 2 As shown, this embodiment discloses a phase change energy storage radiator, including a heat exchange shell. The heat exchange shell of this embodiment includes a shell body 100 with a box-shaped structure having an inner cavity. The front end face of the shell body 100 is open and fitted with a plate (not shown in the figure). The shell body 100 has an inner cavity, and the lower ends of the condenser tube 11 and the evaporator tube 12 are both connected to the top of the shell body 100.

[0019] The inner cavity includes several condensing chambers 1 and evaporating chambers 2 arranged side by side at intervals. The lower end of the condensing chamber 1 is connected to the lower end of the evaporating chamber 2, the top end of the condensing chamber 1 is connected to the lower end of the condensing tube 11, and the top end of the evaporating chamber 2 is connected to the lower end of the evaporating tube 12. In this embodiment, a condensing chamber 1 is provided on each of the left and right sides of the heat exchange shell, and four evaporating chambers 2 arranged side by side at intervals are located between two condensing chambers 1.

[0020] The heat exchange shell contains two liquid storage tanks 3, each corresponding to a condensing chamber 1. The upper side wall of the condensing chamber 1 has a connecting groove 31 communicating with the liquid storage tanks 3. The bottom of each liquid storage tank 3 has a downward-extending reflux groove 32 communicating with the lower part of the evaporation chamber 2. A valve 33 is provided between the liquid storage tanks 3 and the reflux groove 32. When the liquid level in the liquid storage tank 3 reaches a set position, the valve 33 opens, connecting the liquid storage tank 3 and the reflux groove 32. In this embodiment, the valve 33 is a float valve. The inner wall of the liquid storage tank 3 has a hydrophobic coating. A transparent observation window is provided on the heat exchange shell corresponding to the liquid storage tank 3. The connecting groove 31 is inclined at 45°, with the end of the connecting groove 31 near the condensing chamber 1 higher than the end near the liquid storage tank 3. The connecting groove 31 is lined with copper fiber felt (not shown in the figure).

[0021] Depend on Figure 2 As shown, a Z-shaped baffle 30 is fixed inside the liquid storage tank 3. The baffle 30 divides the liquid storage tank 3 into one part connected to the connecting tank 31 and the other part connected to the return tank 32. The baffle 30 includes an inclined section, an upper connecting section, and a lower connecting section. The baffle 30 is made of 200-mesh stainless steel wire mesh with fine holes. The lower end of the inclined section of the baffle 30 is located below the outlet of the connecting tank 31, and the upper end of the inclined section of the baffle 30 is located above the outlet of the connecting tank 31 and away from the outlet of the connecting tank 31.

[0022] The surfaces of the condensing chamber 1, evaporating chamber 2, connecting groove 31, liquid storage tank 3, and reflux groove 32 are all electropolished (Ra < 0.8 μm) to reduce flow resistance. The top of the liquid storage tank 3 is connected to the vapor phase region of the condensing end through a thin tube with a diameter of 1 mm (not shown in the figure) to avoid gas lock. A temperature sensor (not shown in the figure) is attached to the outer wall of the housing body 100 corresponding to the liquid storage tank 3 and is equipped with an auxiliary cooling fan. When the set temperature is exceeded (e.g., 40°C), the auxiliary cooling fan is triggered.

[0023] This invention has the advantage of minimizing the negative impact of thermal expansion and contraction of the refrigerant on phase change efficiency, thus ensuring the stability of the system.

Claims

1. A phase change energy storage radiator, comprising a heat exchange shell, the heat exchange shell having an inner cavity and connected to a condenser tube and an evaporator tube, characterized in that: The inner cavity includes several condensing chambers and evaporating chambers arranged side by side at intervals. The lower end of the condensing chamber is connected to the lower end of the evaporating chamber. The top of the condensing chamber is connected to a condensing tube, and the top of the evaporating chamber is connected to an evaporating tube. A liquid storage tank is provided inside the heat exchange shell. A connecting groove communicating with the liquid storage tank is provided on the upper end of the side wall of the condensing chamber. A reflux trough extending downward and communicating with the lower part of the evaporating chamber is provided at the bottom of the liquid storage tank. A valve is provided between the liquid storage tank and the reflux trough. When the liquid level in the liquid storage tank reaches a set position, the valve opens to connect the liquid storage tank and the reflux trough.

2. The phase change energy storage radiator according to claim 1, characterized in that: The liquid storage tank is equipped with a baffle mesh with fine holes. One end of the baffle mesh is located below the outlet of the connecting groove. The baffle mesh divides the liquid storage tank into a liquid storage tank part connected to the connecting groove and a liquid storage tank part connected to the return groove.

3. The phase change energy storage radiator according to claim 1, characterized in that: The connecting groove is inclined, with the end of the connecting groove near the condensation cavity being higher than the end near the liquid storage tank.

4. The phase change energy storage radiator according to claim 3, characterized in that: The inclination angle of the connecting groove is 30°-60°.

5. The phase change energy storage radiator according to claim 1, characterized in that: The connecting groove is lined with copper fiber felt.

6. The phase change energy storage radiator according to claim 1, characterized in that: The inner wall of the liquid storage tank is coated with a hydrophobic coating.

7. The phase change energy storage radiator according to claim 1, characterized in that: The heat exchange shell is provided with a transparent observation window at the location corresponding to the liquid storage tank.

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