Phase change cold storage module with balanced cold charging and releasing and phase change cold storage equipment

Abstract

The utility model discloses a cold charge and release balanced phase change cold storage module and phase change cold storage equipment, the phase change cold storage module comprises a plurality of groups of cold storage components, each group of cold storage components comprises a plurality of cold storage plates arranged side by side, and gaps for secondary refrigerant circulation are arranged between adjacent cold storage plates. The thicknesses of the cold storage plates in the same cold storage assembly and the distances between the adjacent cold storage plates are the same, in the flowing direction of the secondary refrigerant, the thicknesses of the cold storage plates are gradually reduced, and meanwhile the product of the number of the cold storage plates and the distances between the adjacent cold storage plates is kept unchanged or gradually reduced. According to the phase change cold storage module, the thickness and the plate distance of the cold storage plates are uniquely designed, the plate body thickness of the cold storage plates is gradually reduced in the flowing direction of the secondary refrigerant, and meanwhile it is guaranteed that the flow speed of the secondary refrigerant is consistent or the flow speed of the back face is higher, so that the time for completing cold filling can be consistent before and after, and the cold filling efficiency is improved. The cold charging time of the whole heat exchanger is longer due to the fact that phase change of the front cold storage plate is completed and phase change of the rear cold storage plate is avoided.

Description

TECHNICAL FIELD

[0001] The utility model relates to cold storage equipment technical field, concretely relates to a phase change cold storage module and phase change cold storage equipment of filling and releasing cold balance. BACKGROUND

[0002] With the country has introduced the power policy of encouraging peak load shifting, in order to make full use of power resources, cold storage air conditioner is therefore favored by people. At present, water cold storage equipment and ice cold storage equipment have been developed on the market, the above two kinds are all use peak and valley electricity price difference, store cold / heat at low valley electricity price period, use stored cold / heat to provide air conditioning cold / heat at daytime power peak period. When air conditioning use time and non air conditioning use time and power grid peak and low valley are synchronous, can the air conditioning power consumption of power grid peak time be transferred to the use of power grid low valley.

[0003] Reference 1: Chinese patent document with publication number CN 104061813 A

[0004] Reference 1 discloses a phase change energy storage water tank, which comprises a water tank body, a phase change cold storage layer is arranged in the water tank body, uniform flow water pipes for water inlet and outlet are arranged on the opposite sides of the water tank body in length direction, the uniform flow water pipe comprises a main pipe and a branch pipe, the branch pipe is arranged in the water tank body, the branch pipe comprises at least one branch pipe, a plurality of uniform flow holes are uniformly arranged on one side pipe wall of the inner side wall of the branch pipe, a turbulence hole plate is arranged between the uniform flow water pipe and the phase change cold storage layer, a plurality of through holes are uniformly arranged on the turbulence hole plate, a plurality of turbulence baffles are arranged between the circumferential side of the water tank body in length direction and the phase change cold storage layer, and the turbulence baffles are arranged in the water tank body in length direction. The phase change energy storage water tank can not only make water or refrigerant uniformly enter the water tank, but also further make water or refrigerant fully contact and mix heat exchange with phase change material in the water tank, so as to improve the cold storage or cooling effect of the phase change cold storage water tank.

[0005] Reference 2: Chinese patent document with publication number CN 115752056 A

[0006] Reference 2 describes a high-efficiency stable phase change cold storage device using thin plate packaging, including a tank body and a plurality of phase change cold storage plates arranged inside the tank body, the inside of the tank body is provided with a support frame and a support beam; the phase change cold storage plates are supported by the support beam and placed on the support frame; a plurality of phase change cold storage plates are horizontally placed, and the adjacent phase change cold storage plates are not in contact; each phase change cold storage plate is provided with a slot hole; the phase change cold storage plates are staggered in the tank body, and the slot holes form an S-shaped flow channel; when the phase change cold storage device stores cold, cold water is introduced from the bottom of the tank body and exchanges heat with the phase change cold storage plates. The phase change cold storage device is aimed at the hydration salt phase change cold storage system, the hydration salt phase change material is packaged in thin plates, the phase separation characteristics of the hydration salt phase change material are effectively inhibited, the high-efficiency heat exchange and cycle stability of the phase change cold storage device are ensured, and the development of the phase change cold storage air conditioner is promoted.

[0007] However, the existing phase change cold storage equipment still has the following problems:

[0008] The charging / discharging of the cold storage plates at different positions in the cold storage equipment is not balanced, the cold storage plates close to the cold carrier inlet are fully charged in a short time, and the cold storage plates far from the cold carrier inlet need a longer time to be fully charged, thereby finally causing the charging time of the whole cold storage equipment to be longer. Utility model content

[0009] The utility model aims at solving the technical problem that the phase change cold storage equipment in the prior art has the charging / discharging of the cold storage plates at different positions not balanced, and provides a phase change cold storage module and a phase change cold storage equipment with balanced charging / discharging.

[0010] In order to solve the above technical problems, the utility model adopts the technical scheme that a phase change cold storage module with balanced charging / discharging includes a plurality of groups of cold storage components arranged along the flow direction of the cold carrier, each group of cold storage components includes a plurality of cold storage plates arranged side by side, the gap for the flow of the cold carrier is arranged between the upper and lower adjacent cold storage plates, the thickness of the cold storage plate in the same cold storage component and the spacing between the upper and lower adjacent cold storage plates are the same, along the flow direction of the cold carrier, the cold storage components are as follows: the thickness of the cold storage plate gradually decreases, and the product of the number of the cold storage plates and the spacing between the adjacent cold storage plates remains unchanged or gradually decreases.

[0011] As a further optimization of the utility model, the ratio of the thickness of the cold storage plate to the spacing between the adjacent cold storage plates in the same group is k, 1≤k≤7, the k values of different cold storage components are different, and the k values change as follows: along the flow direction of the cold carrier, k gradually increases.

[0012] As a further optimization of the utility model discloses a kind of phase change cold storage modules of balance of charge release cold: same group is filled in the phase change material of cold storage plate, and the phase change material filled in the cold storage plate of different group cold storage assembly is different, and the change of phase change material is as follows rule: along the flow direction of cooling medium, the thermal conductivity of phase change material gradually increases.

[0013] As a further optimization of the utility model discloses a kind of phase change cold storage modules of balance of charge release cold: the cold storage plate includes cold storage plate body, and the cold storage plate body has phase change cold storage material storage cavity, and one end of the cold storage plate body is provided with loading port, the upper and lower surfaces of the cold storage plate body are provided with multiple mutually parallel flow guide grooves, and the surface of the cold storage plate body is uniformly distributed with multiple V-shaped protrusions or arc protrusions between adjacent two flow guide grooves and between the outermost flow guide groove and the body side along its length direction.

[0014] As a further optimization of the utility model discloses a kind of phase change cold storage modules of balance of charge release cold: the loading port of the cold storage plate body is provided with threaded loading nozzle, and cap is rotatably arranged on the loading nozzle, and the end of the cold storage plate body opposite to the loading nozzle is provided with avoidance slot suitable for the shape of the loading nozzle.

[0015] The utility model also provides a kind of phase change cold storage equipment, including box, and box is equipped with cooling agent inlet and outlet, and cooling agent flow channel has between inlet and outlet, and the flow channel is provided with above-mentioned cold storage module.

[0016] As a further optimization of the utility model discloses a kind of phase change cold storage equipment: the inside of the box is divided into multiple layers of cavities by horizontal partition, and each layer of cavity is divided into multiple flow channels by vertical partition, and multiple flow channels in the same layer are connected together, and multiple layers of cavities are connected together.

[0017] As a further optimization of the utility model discloses a kind of phase change cold storage equipment: the inside of the box is divided into two layers by horizontal partition, and the space in each layer is divided into three flow channels connected together by two vertical partitions, and the horizontal partition has through hole for connecting the end of lower layer flow channel and the beginning of upper layer flow channel, and cooling agent inlet is arranged at the position of the box corresponding to the beginning of lower layer flow channel, and cooling agent outlet is arranged at the position of the box corresponding to the end of upper layer flow channel.

[0018] As a further optimization of the utility model discloses a kind of phase change cold storage equipment: the box is provided with distributor corresponding to cooling agent inlet, and exhaust hole is arranged on the top of the box corresponding to cooling agent outlet.

[0019] As a further optimization of the utility model discloses a kind of phase change cold storage equipment: the inlet end of each flow channel is provided with distribution orifice plate.

[0020] The utility model has the following beneficial effects: the utility model carries out unique design to the thickness of the cold storage plate and the plate spacing, along the flow direction of the cold carrier, the plate body thickness of the cold storage plate is gradually thinned, and the flow rate of the cold carrier is ensured to be consistent or higher in the rear, so that the time of completing the cooling can be ensured to be consistent, and the front cold storage plate completes the phase change, and the rear cold storage plate does not have the phase change, so that the cooling time of the whole heat exchanger is longer. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 It is whole structure schematic diagram (form one) of cold storage plate;

[0022] Figure 2 It is assembly state schematic diagram (form one) of cold storage plate;

[0023] Figure 3 It is whole structure schematic diagram (form two) of cold storage plate;

[0024] Figure 4 It is structure schematic diagram (form two) of V-shaped protrusion and V-shaped recess of cold storage plate;

[0025] Figure 5 It is assembly state schematic diagram (form two) of cold storage plate;

[0026] Figure 6 It is whole structure schematic diagram (form three) of cold storage plate;

[0027] Figure 7 It is structure schematic diagram (form three) of first protrusion and second protrusion of cold storage plate;

[0028] Figure 8 It is assembly state schematic diagram (form three) of cold storage plate;

[0029] Figure 9 It is whole structure schematic diagram (with avoiding groove) of cold storage plate;

[0030] Figure 10 It is internal structure schematic diagram (side view one) of phase change cold storage equipment;

[0031] Figure 11 It is internal structure schematic diagram (side view two) of phase change cold storage equipment;

[0032] Figure 12 It is internal structure schematic diagram (top view) of phase change cold storage equipment;

[0033] Figure 13 It is plate body structure schematic diagram of distribution hole plate in phase change cold storage equipment;

[0034] Mark in drawing:

[0035] 1, cold storage plate;

[0036] 2. flow guide groove;

[0037] 3. V-shaped protrusion;

[0038] 4. V-shaped groove;

[0039] 5. first protrusion;

[0040] 6. second protrusion;

[0041] 7. avoiding groove;

[0042] 8. box;

[0043] 9. horizontal partition plate;

[0044] 10. vertical partition plate;

[0045] 11. distributor;

[0046] 12. distribution orifice plate. DETAILED DESCRIPTION

[0047] In order to better understand the present application, the content of the present application will be further illustrated in combination with examples below, but the content of the present application is not limited to the examples below.

[0048] <cold storage module>

[0049] As shown in the figure: a phase change cold storage module with charging and releasing cold balance, comprising a plurality of groups of cold storage components arranged along the flow direction of the cold carrier, each group of cold storage components comprising a plurality of cold storage plates 1 arranged side by side, and having a gap between adjacent cold storage plates 1 for the flow of cold carrier. The thickness of the cold storage plates 1 in the same cold storage component and the spacing between adjacent cold storage plates 1 are the same, and along the flow direction of the cold carrier, the cold storage components have the following rules: the thickness of the cold storage plates 1 gradually decreases, and the product of the number of cold storage plates 1 and the spacing between adjacent cold storage plates 1 remains unchanged or gradually decreases.

[0050] All cold storage plates 1 in each cold storage component are the same in size, and the phase change material filled therein is also the same. It can be foreseen that since the thickness of the cold storage plates 1 gradually decreases along the flow direction of the cold carrier, the number of cold storage plates 1 in the cold storage component also has a tendency to increase along the flow direction of the cold carrier.

[0051] The ratio of the thickness of the cold storage plates 1 to the spacing between adjacent cold storage plates 1 in the same group is k, 1≤k≤7, and the k values of different cold storage components are different, and the k values change as follows: along the flow direction of the cold carrier, k gradually increases.

[0052] Water has a high specific heat capacity, can absorb or release a large amount of heat and the temperature change is relatively small, which makes it can effectively store and transfer cold in the process of cold storage and release. Moreover, the chemical properties of water are stable, and it will not react under normal conditions of cold storage and release, and will not cause corrosion and other adverse effects on the cold storage equipment and the cooled object.

[0053] The phase change material filled in the cold storage plate 1 in the same group is the same, and the phase change material filled in the cold storage plate 1 of the cold storage assembly in different groups is different. The change of the phase change material is as follows: along the flow direction of the cold carrier, the thermal conductivity of the phase change material gradually increases.

[0054] Along the flow direction of the cold carrier, the thickness of the plate body of the cold storage plate gradually thins, and the product of the number of cold storage plates 1 and the distance between adjacent cold storage plates 1 remains unchanged or gradually decreases. Such design can ensure that the flow rate of the cold carrier is consistent or higher in the flow direction, so that the completion time of the charging can be guaranteed to be consistent, avoiding the completion of the phase change of the front cold storage plate and the non-phase change of the rear cold storage plate, which causes the charging time of the entire heat exchanger to be longer.

[0055] The cold storage plate 1 comprises a cold storage plate body, the cold storage plate body has a phase change cold storage material storage cavity, one end of the cold storage plate body is provided with a loading port, and the upper and lower surfaces of the cold storage plate body are provided with a plurality of parallel flow guide grooves 2. A plurality of V-shaped protrusions 3 or arc-shaped protrusions are uniformly distributed along the length direction between adjacent two flow guide grooves 2 and between the outermost flow guide groove 2 and the side edge of the body surface.

[0056] The loading port of the cold storage plate body is provided with a loading nozzle and a cap, which is mainly convenient for filling the phase change material into the cold storage plate. There are at least two ways to set the loading nozzle:

[0057] The loading port of the cold storage plate body is located in the notch, and the loading nozzle is hidden in the notch. The shape of the entire cold storage plate body is relatively regular, but the loading nozzle of this form cannot completely fill the inside of the cold storage plate body. Some organic phase change materials are liquid at room temperature, and will solidify into solid state when the temperature decreases below the melting point. The volume of the organic phase change material will shrink during the solidification process, because the molecules are relatively loose in liquid state, and the arrangement is more compact in solid state. Even if the material is filled, it will not cause the cold storage plate to deform during the phase change process.

[0058] Another form is that the loading port of the cold storage plate body is provided with a threaded loading nozzle, a cap is rotatably arranged on the loading nozzle, and the end of the cold storage plate body opposite to the loading nozzle is provided with a suitable avoiding groove 7. The avoiding groove 7 is used when multiple cold storage plates are connected, and the loading nozzle of the adjacent cold storage plate can be placed in the avoiding groove 7 (as shown in Figure 9 ).

[0059] The specific forms of the cold storage plate body are as follows:

[0060] <Form 1>

[0061] like Figures 1-2 As shown: The material of the cold storage plate body is usually made of plastic, such as HDPE and PE. Plastic materials are widely used in the manufacture of cold storage ice boxes due to their good plasticity, durability, and cost-effectiveness. HDPE (high-density polyethylene) and PE (polyethylene) are not only safe and non-toxic, but also have good cold insulation properties and can be reused repeatedly.

[0062] Multiple parallel guide grooves 2 are provided on both the upper and lower surfaces of the cold storage plate body, and the cross-section of the guide grooves 2 is an inverted trapezoid. Multiple V-shaped protrusions 3 are evenly distributed along the length of the surface of the cold storage plate body between two adjacent guide grooves 2 and between the outermost guide groove 2 and the side of the body.

[0063] The raised openings on the upper and lower surfaces of the cold storage plate body face opposite directions. The upper and lower surfaces of the cold storage plate body are also provided with end grooves, the cross-section of which is V-shaped. One end of the end groove connects to the end face of the cold storage plate body, and the other end extends into the interval of the guide groove 2.

[0064] Through the above-mentioned unique surface structure design, the turbulence of the heat transfer medium on the surface of the cold storage plate can be improved, thereby improving the heat transfer efficiency. In addition, the ice box has strong resistance to external pressure and the sealing port does not leak.

[0065] <Form Two>

[0066] like Figures 3-5 As shown: This form has the same overall structure as <Form 1>, except that: a V-shaped groove 4 is provided between two adjacent protrusions in the same column, and the orientation of the V-shaped groove 4 or the arc-shaped groove is consistent with that of the V-shaped protrusion 3.

[0067] <Form Three>

[0068] like Figures 6-8 As shown: This form has the same overall structure as <Form 1>, the difference being that the heights of the protrusions in the same column are inconsistent.

[0069] The protrusions in the same column include a first protrusion 5 with a height of h1 and a second protrusion 6 with a height of h2, where h1 > h2. The multiple protrusions in the same column are arranged in a pattern of "first protrusion, second protrusion, second protrusion, first protrusion, second protrusion, second protrusion, first protrusion..."

[0070] Cold storage equipment

[0071] like Figures 10-13As shown: a phase change cold storage device, comprising a box 8. The inside of the box 8 is divided into two layers by a horizontal partition 9, and each layer is divided into three flow channels by a vertical partition 10. The box 8 is provided with water inlets and outlets at both ends of each flow channel. The water inlets and outlets of adjacent two flow channels are arranged in opposite directions. The three flow channels in the same layer are connected in series through the water inlets and outlets. The total water outlet of the lower layer is connected to the total water inlet of the upper layer.

[0072] A distributor 11 is arranged at the total water inlet corresponding to the flow channel in the box 8. An exhaust hole is arranged at the top of the box 8 corresponding to the outlet of the cold carrier.

[0073] A distribution orifice plate 12 is arranged at the inlet end of each flow channel. The distribution orifice plate 12 comprises a plate body uniformly provided with water passing holes.

[0074] The phase change cold storage device has two layers of flow channels. Each layer of channels is divided by a vertical partition 10 to form three flow channels connected in series. Each flow channel is provided with a plurality of groups of cold storage components arranged along the flow direction of the cold carrier. Each group of cold storage components comprises a plurality of cold storage plates 1 arranged side by side. Adjacent cold storage plates 1 have gaps for the flow of cold carrier. The thickness of the cold storage plates 1 and the spacing between adjacent cold storage plates 1 in the same cold storage component are the same. Along the flow direction of the cold carrier, the cold storage components have the following rules: the thickness of the cold storage plates 1 gradually decreases, and the product of the number of cold storage plates 1 and the spacing between adjacent cold storage plates 1 remains unchanged or gradually decreases.

[0075] The ratio of the thickness of the cold storage plates 1 to the spacing between adjacent cold storage plates 1 in the same group is k, and 1≤k≤7. The value of k is different for different cold storage components. The value of k changes as follows: along the flow direction of the cold carrier, k gradually increases.

[0076] The phase change material filled in the cold storage plates 1 in the same group is the same. The phase change material filled in the cold storage plates 1 of different groups of cold storage components is different. The thermal conductivity of the phase change material changes as follows: along the flow direction of the cold carrier, the thermal conductivity of the phase change material gradually increases.

[0077] Along the flow direction of the cold carrier, the thickness of the plate body of the cold storage plate gradually decreases, and the product of the number of cold storage plates 1 and the spacing between adjacent cold storage plates 1 remains unchanged or gradually decreases. This design can ensure that the flow rates of the cold carrier before and after are consistent or the flow rate after is higher along the flow direction of the cold carrier. In this way, the time for completing the charging and cooling can be ensured to be consistent, avoiding the situation that the front cold storage plate completes the phase change, and the rear cold storage plate does not have the phase change, resulting in a longer charging and cooling time of the entire heat exchanger.

[0078] The cold storage board utilizes its special design and the phase change material filled therein to effectively capture the cold carried by the cooling water generated by the water chiller. The phase change material has specific thermodynamic properties and can change phase, such as changing from liquid to solid or changing from one crystal state to another crystal state, in a low-temperature environment, thereby absorbing a large amount of latent heat and achieving cold storage.

[0079] The phase change material filled in the cold storage board can be a hydrated salt phase change material, which mainly realizes cold storage through its solid-liquid phase change at a specific temperature. In the cold storage process, when the ambient temperature is lower than the phase change temperature of the hydrated salt, the hydrated salt changes from liquid to solid, releases latent heat of phase change, and thus realizes cold storage. In the cold release process, when the ambient temperature is higher than the phase change temperature of the hydrated salt, the hydrated salt changes from solid to liquid, absorbs heat from the surroundings, and realizes cold release.

[0080] When the day comes, the power consumption peak period appears. At this time, the phase change cold storage tank starts to release cold. Through the reasonably arranged heat exchange system, the reverse phase change process occurs in the cold storage tank, and the stored cold is transferred to the refrigerant, which is then uniformly distributed to each area of the data center through the precisely designed pipeline network, thereby effectively reducing the temperature of the data center and meeting the cooling demand of the data center.

[0081] This working mode effectively realizes the "peak load shifting" of electricity. During the power consumption peak period, the phase change cold storage tank is used to release cold for the data center, which significantly reduces the amount of electricity obtained from the power grid for cooling in the data center, and relieves the power supply pressure of the power grid during the peak period. At the same time, during the night power consumption valley period, the water chiller increases the power load during the valley period for the cold storage process of the cold storage tank, improves the power utilization rate of the power system during the valley period, and makes the power resources more reasonably distributed and utilized in the time dimension, which is of great significance for optimizing the operation efficiency and economy of the power system.

[0082] The specific embodiments of the utility model are described above. It should be understood that the utility model is not limited to the above specific embodiments, and those skilled in the art can make various modifications or changes within the scope of the claims, which does not affect the essential content of the utility model.

Claims

1. A phase change thermal storage module of charge-replenishable cold equalization, comprising a plurality of groups of thermal storage assemblies arranged along a direction of flow of a secondary coolant, each group of thermal storage assemblies comprising a plurality of thermal storage panels (1) arranged side by side, with a gap between adjacent thermal storage panels (1) for the flow of the secondary coolant therethrough, characterized in that: The thickness of the cold storage plates (1) in the same cold storage assembly and the spacing between adjacent cold storage plates (1) are the same, and along the flow direction of the cold carrier, the cold storage assembly has the following rules: the thickness of the cold storage plates (1) gradually decreases, and the product of the number of cold storage plates (1) and the spacing between adjacent cold storage plates (1) remains unchanged or gradually decreases.

2. The adiabatic phase change thermal storage module of claim 1, wherein: The ratio of the thickness of the cold storage plates (1) to the spacing between adjacent cold storage plates (1) in the same cold storage assembly is k, 1≤k≤7, and the k values of different cold storage assemblies are different, and the k values change as follows: along the flow direction of the cold carrier, k gradually increases.

3. The adiabatic phase change thermal storage module of claim 1, wherein: The phase change materials filled in the cold storage plates (1) in the same cold storage assembly are the same, the phase change materials filled in the cold storage plates (1) of different cold storage assemblies are different, and the phase change materials change as follows: along the flow direction of the cold carrier, the thermal conductivity of the phase change materials gradually increases.

4. The adiabatic phase change thermal storage module of claim 3, wherein: The cold storage plate (1) comprises a cold storage plate body, the cold storage plate body has a phase change cold storage material storage cavity, one end of the cold storage plate body is provided with a loading port, and the upper and lower surfaces of the cold storage plate body are provided with a plurality of parallel flow guide grooves (2). A plurality of V-shaped protrusions (3) or arc-shaped protrusions are arranged on the surface of the cold storage plate body between adjacent two flow guide grooves (2) and between the outermost flow guide groove (2) and the side edge of the body along the length direction.

5. The adiabatic phase change thermal storage module of claim 4, wherein: The loading port of the cold storage plate body is provided with a threaded loading nozzle, a cap is rotatably arranged on the loading nozzle, and the end of the cold storage plate body opposite to the loading nozzle is provided with a relief groove (7) suitable for the shape of the loading nozzle.

6. A phase change thermal storage device comprising a tank (8) provided with a heat transfer fluid inlet and outlet, between which there is a heat transfer fluid flow path, characterised in that: The flow channel is provided with the cold storage module of any one of claims 1-5.

7. The phase change cold accumulation device according to claim 6, wherein: The inside of the box (8) is divided into multiple layers of cavities by horizontal partitions (9), and each layer of cavities is divided into multiple flow channels by vertical partitions (10). The multiple flow channels in the same layer are connected in series, and the multiple layers of cavities are connected in series.

8. The phase change cold accumulation device according to claim 7, wherein: The inside of the box (8) is divided into two layers by a horizontal partition (9), and each layer is divided into three flow channels connected in series by two vertical partitions (10). The horizontal partition (9) has a through hole communicating the end of the lower flow channel and the beginning of the upper flow channel. The cold carrier inlet is arranged at a position corresponding to the beginning of the lower flow channel of the box (8), and the cold carrier outlet is arranged at a position corresponding to the end of the upper flow channel of the box (8).

9. The phase change cold accumulation device according to claim 7, wherein: A distributor is arranged in the box (8) corresponding to the total inlet of the flow channel, and an exhaust hole is arranged on the top of the box (8) corresponding to the cold carrier outlet.

10. The phase change cold accumulation device according to claim 7, wherein: The inlet end of each flow channel is provided with a distribution hole plate.

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