Anti-crystallization water distributor flow equalization structure of cold storage system

Abstract

The utility model discloses a kind of anti-crystallization cold storage system water distributor flow equalizing structure, including water distributor main part, the bottom of water distributor main part is provided with flow equalizing plate, water outlet hole is opened in flow equalizing plate, hot insulation bushing is inlayed and installed on water outlet hole, the inner wall of hot insulation bushing constitutes the flow channel of cold carrier, and the inner wall of hot insulation bushing is provided with the anti-crystallization spoiler that protrudes to central axis direction, anti-crystallization spoiler is the spoiler protruding from water outlet hole hole wall to central axis direction;Anti-crystallization water distributor flow equalizing structure provided by the utility model, by introducing the double design of hot insulation bushing and anti-crystallization spoiler, jointly create the flow field and temperature field environment that ice crystal formation and adhesion are not conducive to, to thoroughly solve the crystallization plugging problem of water distribution hole under freezing point near working condition, guarantee the uniformity and operating reliability of cold storage system water distribution.

Description

Technical Field

[0001] This utility model relates to the technical field of air conditioning cold storage, specifically to a flow equalization structure for a water distributor in a cold storage system that prevents crystallization. Background Technology

[0002] In dynamic cold storage systems such as ice slurry cold storage and eutectic salt cold storage, the cold storage tank is the core component for storing and releasing cold energy. Its working principle is that the refrigerant, usually a low-temperature liquid such as ethylene glycol aqueous solution, is evenly distributed to the cross-section of the cold storage tank through a water distributor, so that it can have a full and stable heat exchange with the water or phase change material in the tank, thereby realizing the solidification or melting of the phase change material. In this process, the flow uniformity performance of the water distributor directly determines the efficiency and reliability of the entire cold storage system.

[0003] In existing technologies, the water distributor in a cold storage system does not distribute pure water, but rather a refrigerant with a temperature close to or below its freezing point. During the water distribution process, due to uneven local flow rates and temperature fluctuations, the water in the refrigerant is prone to instantaneous and localized crystallization at the outlet of the water distributor. These tiny ice crystals adhere to the hole walls and grow rapidly over time, eventually clogging the water distribution holes and disrupting the flow field distribution. Summary of the Invention

[0004] The purpose of this invention is to provide a flow equalization structure for a water distributor in a cold storage system that prevents crystallization, in order to solve the problem that when a refrigerant with a temperature close to or below the freezing point flows through the outlet hole of the water distributor in a cold storage system, it is easy for instantaneous crystallization to occur on the hole wall and eventually block the hole.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a flow equalization structure for a water distributor in a cold storage system that prevents crystallization, comprising a water distributor body, a flow equalization plate at the bottom of the water distributor body, a water outlet hole on the flow equalization plate, a heat insulation bushing embedded in the water outlet hole, the inner wall of the heat insulation bushing forming a flow channel for the refrigerant, and an anti-crystallization turbulence element protruding towards the central axis on the inner wall of the heat insulation bushing.

[0006] Preferably, the anti-crystallization turbulence element is a turbulence protrusion that protrudes from the wall of the water outlet hole toward the central axis.

[0007] Preferably, the turbulence protrusion is a streamlined guide fin, and the extension direction of the guide fin forms an acute angle with the axial direction of the thermal insulation bushing.

[0008] Preferably, multiple flow guide fins are disposed downward on the inner circumference of the heat insulation bushing and are distributed in a spiral array along the axis of the heat insulation bushing.

[0009] Preferably, the turbulence protrusions are hemispherical anti-condensation protrusions, and multiple anti-condensation protrusions are located on the inner wall surface of the thermal insulation bushing, and are arranged non-periodically in both the circumferential and axial directions of the thermal insulation bushing.

[0010] Preferably, a gap is left between the apex of the anti-condensation protrusion and the central axis of the thermal insulation bushing.

[0011] Preferably, the heat insulation bushing and the anti-crystallization turbulence component are integrally injection molded structures.

[0012] Compared with the prior art, the beneficial effects of this utility model are: The anti-crystallization water distributor flow equalization structure provided by this utility model effectively solves the technical problem of refrigerant crystallization and blockage at the water distribution orifice by introducing a dual design of thermal isolation bushing and anti-crystallization turbulence component. First, the low thermal conductivity thermal isolation bushing significantly blocks the transfer of cold energy through the metal orifice wall, raising the orifice wall temperature from the source and inhibiting the formation of ice crystal nuclei. Second, the integrally formed turbulence component on the inner wall can destroy the laminar boundary layer and generate continuous micro-vortices, which not only enhances heat transfer to equalize the temperature field, but also scours the orifice wall through fluid shearing, preventing trace ice crystals from adhering and growing. The two work together to fundamentally ensure the smoothness and reliability of the water distributor under operating conditions near the freezing point. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the main structure of the water distributor of this utility model.

[0014] Figure 2 This is a schematic diagram of the structure of the guide fin of this utility model.

[0015] Figure 3 This is a schematic diagram of the anti-coagulation protrusion of this utility model.

[0016] Figure 4 This is a top view of the thermal insulation bushing of this utility model.

[0017] In the figure: 1-Water distributor body; 2-Flow equalization plate; 3-Water outlet; 4-Flow turbulence component; 41-Flow guide fin; 42-Anti-condensation protrusion; 43-Gap; 5-Thermal insulation bushing. Detailed Implementation

[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0019] Please see Figure 1 The present invention provides a technical solution: the water distributor flow equalization structure of the anti-crystallization cold storage system provided in this embodiment includes a water distributor body 1, which is usually a cylindrical hollow pressure vessel, and a flow equalization plate 2 is fixedly installed at its bottom by welding. The flow equalization plate 2 has water outlet holes 3 densely opened in a matrix.

[0020] As attached Figure 1 As shown, to solve the crystallization blockage problem, an independent thermal isolation bushing 5 is interference-fitted into each of the water outlet holes 3 in the flow equalization plate 2. The thermal isolation bushing 5 is made of engineering plastic with low thermal conductivity through injection molding. Its outer wall is tightly fitted to the hole wall of the water outlet hole 3 of the flow equalization plate 2. The thermal isolation bushing 5 effectively blocks the direct and efficient heat conduction between the low-temperature metal flow equalization plate 2 and the refrigerant flowing through the channel, significantly increases the local temperature of the hole wall, and physically reduces the supercooling of the refrigerant at the hole wall, thereby fundamentally inhibiting the initial formation of ice crystal nuclei.

[0021] As attached Figure 2 and Figure 3 As shown, further, an anti-crystallization turbulence element 4 protruding towards the central axis of the heat insulation bushing 5 is integrally injection molded on the inner wall of the heat insulation bushing 5. When the refrigerant flows through the interior of the heat insulation bushing 5, the turbulence element 4 will disrupt the stable laminar boundary layer near the hole wall, generating continuous micro-eddies and fluid shear force. This disturbance, on the one hand, makes the temperature and material exchange between the fluid core and the hole wall more sufficient, further homogenizing the temperature field; on the other hand, it generates a continuous scouring effect on the hole wall, so that even if a small amount of ice crystals are formed, they cannot be stably attached and grown, and are thus carried away by the main fluid.

[0022] As attached Figure 2 As shown in the preferred embodiment of this utility model, the anti-crystallization turbulence component 4 is specifically a streamlined flow guide fin 41. The extension direction of the flow guide fin 41 forms an acute angle with the axial direction of the heat insulation bushing 5. Multiple flow guide fins 41 are arranged on the inner circumference of the heat insulation bushing 5 and are distributed in a spiral array along its axis. This structure can guide the fluid that was originally vertically downward into a spiral flow that rotates downward. This spiral flow state enhances the disturbance and mixing inside the fluid, ensuring that the periphery of the hole wall can be effectively cleaned by the fluid. At the same time, it provides a strong anti-crystallization capability while ensuring high flow uniformity accuracy.

[0023] As attached Figure 3 and Figure 4As shown, in another preferred embodiment of this utility model, the anti-crystallization turbulence element 4 is a hemispherical anti-condensation protrusion 42. Multiple anti-condensation protrusions 42 are located on the inner wall surface of the thermal insulation bushing 5 and are arranged non-periodically in both the circumferential and axial directions. This irregular protrusion distribution can generate random micro-vortices without fixed patterns in the flow field, forming a strong turbulent state. The turbulence covers the hole wall without dead angles and is more destructive to ice crystal adhesion. In addition, a gap 43 is left between the apex of the anti-condensation protrusion 42 and the central axis of the thermal insulation bushing 5. This gap 43 ensures that the main fluid in the center of the flow channel can still pass smoothly, avoiding the problem of a significant decrease in the flow coefficient due to excessive protrusion of the turbulence element.

[0024] After the low-temperature refrigerant enters the main body 1 of the water distributor and completes the initial pressure stabilization, it flows to the flow equalization plate 2 at the bottom. When the refrigerant enters the outlet hole 3, which is fitted with a thermal insulation bushing 5, firstly, the low thermal conductivity bushing 5 effectively isolates the cold source effect of the metal hole wall and increases the interface temperature. Subsequently, the fluid is disturbed by the anti-crystallization turbulence element 4 on the inner wall of the bushing, generating eddies or turbulence. These eddies or turbulence enhance heat transfer and prevent local overcooling on the one hand, and continuously shear and scour the hole wall on the other hand.

[0025] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A flow equalization structure for a water distributor in a cold storage system that prevents crystallization, comprising a water distributor body (1), characterized in that: The bottom of the water distributor body (1) is provided with a flow equalization plate (2), and a water outlet hole (3) is provided on the flow equalization plate (2). A heat insulation bushing (5) is installed in the water outlet hole (3). The inner wall of the heat insulation bushing (5) forms a flow channel for the refrigerant, and an anti-crystallization turbulence element (4) protruding towards the central axis is provided on the inner wall of the heat insulation bushing (5).

2. The flow equalization structure of the water distributor for an anti-crystallization cold storage system according to claim 1, characterized in that: The anti-crystallization turbulence component (4) is a turbulence protrusion that protrudes from the wall of the water outlet (3) toward the central axis.

3. The flow equalization structure of the water distributor for an anti-crystallization cold storage system according to claim 2, characterized in that: The turbulence protrusion is a streamlined guide fin (41), and the extension direction of the guide fin (41) forms an acute angle with the axial direction of the thermal insulation bushing (5).

4. The flow equalization structure of the water distributor for an anti-crystallization cold storage system according to claim 3, characterized in that: The guide fins (41) are arranged in multiple downwards on the inner circumference of the heat insulation bushing (5) and are distributed in a spiral array along the axis of the heat insulation bushing (5).

5. The flow equalization structure of the water distributor for an anti-crystallization cold storage system according to claim 2, characterized in that: The turbulence protrusion is a hemispherical anti-condensation protrusion (42). Multiple anti-condensation protrusions (42) are located on the inner wall surface of the thermal insulation bushing (5) and are arranged non-periodically in both the circumferential and axial directions of the thermal insulation bushing (5).

6. The flow equalization structure of the water distributor for an anti-crystallization cold storage system according to claim 5, characterized in that: A gap (43) is left between the apex of the anti-condensation bump (42) and the central axis of the thermal insulation bushing (5).

7. The flow equalization structure of the water distributor for an anti-crystallization cold storage system according to claim 1, characterized in that: The heat insulation bushing (5) and the anti-crystallization turbulence component (4) are integrally injection molded structures.

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