Horizontal high-efficiency phase change cold storage heat exchanger

Abstract

The utility model discloses a horizontal high -efficient phase change cold accumulation heat exchanger, including the hollow cylinder heat exchanger casing of horizontal placement and the head of both ends of heat exchanger casing, is provided with the coolant inlet and coolant outlet on the head, be provided with phase change cold accumulation module in the heat exchanger casing, and phase change cold accumulation module is by the cold accumulation board of a plurality of stack placement constitutes, and the cavity between phase change cold accumulation module and intermediate cylinder is provided with the cold accumulation pipe. The utility model discloses horizontal phase change cold accumulation heat exchanger sets up the cold accumulation pipe in the cavity between the cold accumulation board and the cylinder wall, has realized the efficient utilization of cold accumulation heat exchanger space.

Description

Technical Field

[0001] This utility model relates to the field of cold storage equipment technology, specifically to a horizontal high-efficiency phase change cold storage heat exchanger. Background Technology

[0002] With the government's implementation of electricity policies encouraging peak-shaving and valley-filling to fully utilize electricity resources, air conditioning with thermal storage has become increasingly popular. Currently, water-based thermal storage and ice-based thermal storage systems have been developed on the market. Both utilize the peak-valley electricity price difference to store cooling / heat during off-peak hours and use the stored cooling / heat to provide cooling / heating for air conditioning during peak daytime hours. When air conditioning usage time coincides with non-air conditioning usage time and the grid's peak and off-peak hours, the electricity consumption for air conditioning during peak hours can be shifted to off-peak hours.

[0003] Reference 1: Chinese patent document with publication number CN 218155687 U

[0004] Reference 1 describes a cold storage tank. The cold storage tank contains several cold storage units and baffles; the internal parts of the cold storage units are hollow and can be filled with phase change material; the baffles are respectively located at the upstream and downstream ends of the cold storage tank; the several cold storage units are arranged in the space between the baffles. This cold storage tank uses phase change thermal storage material as the energy storage material, achieving a high energy storage density, significantly saving space and reducing waste. The energy storage density of this cold storage tank is more than six times that of water-based cold storage. Under the same energy storage conditions, the volume of this cold storage tank is one-sixth that of water-based cold storage, offering advantages in terms of small size and small footprint.

[0005] However, when the cold storage unit inside the horizontal cold storage tank uses a cold storage plate, the cold storage plate cannot be completely filled inside the tank. A short-circuit flow channel will be formed between the cold storage plate and the inner wall of the tank. The short-circuit flow channel needs to be sealed to prevent fluid from flowing in and causing a short circuit in the heat exchange. Sealing the short-circuit flow channel reduces the heat exchange area inside the tank, resulting in low space utilization, affecting heat exchange efficiency, and also leading to low cold storage capacity per unit volume. Utility Model Content

[0006] The purpose of this invention is to solve the aforementioned technical problems in the prior art and to provide a horizontal high-efficiency phase change cold storage heat exchanger.

[0007] To address the shortcomings of the aforementioned technical problems, the present invention adopts the following technical solution: a horizontal high-efficiency phase change cold storage heat exchanger, comprising a horizontally placed hollow cylindrical heat exchanger shell and end caps located at both ends of the heat exchanger shell. The end caps are provided with a refrigerant inlet and a refrigerant outlet. A phase change cold storage module is provided inside the heat exchanger shell. The phase change cold storage module is composed of several horizontally stacked cold storage plates. A horizontal flow channel for refrigerant circulation is formed between adjacent cold storage plates. A cold storage pipe is provided in the cavity between the phase change cold storage module and the heat exchanger shell.

[0008] As a further optimization of the horizontal high-efficiency phase change cold storage heat exchanger of this utility model: a cold storage tube support plate is provided in the cavity between the phase change cold storage module and the heat exchanger shell, and the cold storage tube support plate is provided with water permeable holes and mounting holes through which the cold storage tube can pass.

[0009] As a further optimization of the horizontal high-efficiency phase change cold storage heat exchanger of this utility model: a cold storage ball is installed inside the end cap with a refrigerant outlet.

[0010] As a further optimization of the horizontal high-efficiency phase change cold storage heat exchanger of this utility model: a distributor is provided inside the head with a refrigerant inlet.

[0011] As a further optimization of the horizontal high-efficiency phase change cold storage heat exchanger of this utility model: the heat exchanger shell is divided into upper and lower flow channels by a horizontal partition, the first end cap is divided into upper and lower chambers by a horizontal partition, the two flow channels are connected by a second end cap, the refrigerant inlet is set in the lower chamber of the first end cap, and the refrigerant outlet is set in the upper chamber of the first end cap.

[0012] As a further optimization of the horizontal high-efficiency phase change cold storage heat exchanger of this utility model: the heat exchanger is divided into four flow channels by a cross-shaped baffle. The four flow channels are connected in series by through holes provided on the cross-shaped baffle. The refrigerant inlet is set on the end cap at the beginning of the corresponding flow channel, and the refrigerant outlet is set on the end cap at the end of the corresponding flow channel.

[0013] As a further optimization of the horizontal high-efficiency phase change cold storage heat exchanger of this utility model: the phase change cold storage module includes multiple sets of cold storage components arranged along the flow direction of the refrigerant. Each set of cold storage components includes multiple stacked cold storage plates. There are gaps between adjacent cold storage plates for the refrigerant to flow. The thickness of the cold storage plates in the same cold storage component and the spacing between adjacent cold storage plates are the same. Along the flow direction of the refrigerant, the cold storage components exhibit the following pattern: the thickness of the cold storage plates gradually decreases, while the product of the number of cold storage plates and the spacing between adjacent cold storage plates remains unchanged or gradually decreases.

[0014] As a further optimization of the horizontal high-efficiency phase change cold storage heat exchanger of this utility model: the ratio of the thickness of the cold storage plate to the distance between adjacent cold storage plates in the same group is k, 1≤k≤7, and the k value is different for different cold storage components. The change of the k value follows the following rule: along the flow direction of the refrigerant, k gradually increases.

[0015] As a further optimization of the horizontal high-efficiency phase change cold storage heat exchanger of this utility model: the phase change material filled in the cold storage plate in the same group is the same, and the phase change material filled in the cold storage plate in different groups of cold storage components is different. The change of the phase change material follows the following rule: along the flow direction of the refrigerant, the thermal conductivity of the phase change material gradually increases.

[0016] As a further optimization of the horizontal high-efficiency phase change cold storage heat exchanger of this utility model: the cold storage plate includes a cold storage plate body, the cold storage plate body has a phase change cold storage material storage cavity, and the upper and lower surfaces of the cold storage plate body are provided with multiple parallel guide grooves. The surface of the cold storage plate body is provided with multiple V-shaped protrusions or arc-shaped protrusions evenly distributed along its length direction between two adjacent guide grooves and between the outermost guide groove and the side of the body.

[0017] The present invention has the following advantages: The horizontal phase change cold storage heat exchanger of the present invention has a cold storage tube installed in the cavity between the cold storage plate and the cylinder wall, which realizes the efficient utilization of the space of the cold storage heat exchanger. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the external structure of the phase change cold storage heat exchanger in Example 1;

[0019] Figure 2 This is a schematic diagram of the internal structure of the phase change cold storage heat exchanger in Example 1;

[0020] Figure 3 This is a schematic diagram of the internal structure of the phase change cold storage heat exchanger in Example 1 (cold storage plate not shown).

[0021] Figure 4 This is a schematic diagram of the internal structure of the intermediate cylinder of the phase change cold storage heat exchanger in Example 1;

[0022] Figure 5 This is a schematic diagram of the internal structure of the intermediate cylinder of the phase change cold storage heat exchanger in Example 1 (cold storage plate is not shown).

[0023] Figure 6 for Figure 5 A magnified view of a portion of point A in the middle;

[0024] Figure 7 This is a schematic diagram of the internal structure of the phase change cold storage heat exchanger in Example 2 (cold storage plate not shown).

[0025] Figure 8This is a schematic diagram of the internal structure of the phase change cold storage heat exchanger in Example 3 (cold storage plate not shown).

[0026] Figure 9 A schematic diagram of the overall structure of the cold storage plate (Form 1);

[0027] Figure 10 This is a schematic diagram of the assembly state of the cold storage plate (Form 1).

[0028] Figure 11 A schematic diagram of the overall structure of the cold storage plate (Form 2);

[0029] Figure 12 A schematic diagram of the V-shaped protrusions and V-shaped grooves of the cold storage plate (Form 2);

[0030] Figure 13 This is a schematic diagram of the assembly state of the cold storage plate (Form 2).

[0031] Figure 14 A schematic diagram of the overall structure of the cold storage plate (Form 3);

[0032] Figure 15 A schematic diagram of the first and second protrusions of the cold storage plate (Form 3);

[0033] Figure 16 This is a schematic diagram of the assembly state of the cold storage plate (Form 3).

[0034] Marked in the image:

[0035] 1. Cold storage plate;

[0036] 2. Flow guide channel;

[0037] 3. V-shaped protrusion;

[0038] 4. V-shaped groove;

[0039] 5. First protrusion;

[0040] 6. Second protrusion;

[0041] 7. Clearance groove;

[0042] 8. Heat exchanger shell;

[0043] 9. End cap;

[0044] 10. Cold storage pipe;

[0045] 11. Cold storage pipe support plate;

[0046] 12. Mounting holes;

[0047] 13. Cold storage bulb;

[0048] 14. Horizontal partition;

[0049] 15. Cross-shaped partition;

[0050] 16. Water-permeable holes. Detailed Implementation

[0051] To better understand this utility model, the following embodiments further illustrate the content of this utility model, but the content of this utility model is not limited to the following embodiments.

[0052] <Example 1>

[0053] like Figure 1-6 As shown: A horizontal high-efficiency phase change cold storage heat exchanger includes a heat exchanger shell 8 and end caps 9 located at both ends of the heat exchanger shell 8. The end caps 9 are provided with a refrigerant inlet and a refrigerant outlet. A phase change cold storage module is provided inside the heat exchanger shell 8. The phase change cold storage module is composed of several stacked cold storage plates 1. A cold storage pipe 10 is provided in the cavity between the phase change cold storage module and the heat exchanger shell 8.

[0054] Specifically, a cold storage tube support plate 11 is provided in the cavity between the cold storage plate 1 mounting cylinder and the heat exchanger shell 8. The cold storage tube support plate 11 is provided with water permeable holes 16 and mounting holes 12 through which the cold storage tubes 10 can pass. It should be noted that multiple cold storage tube support plates 11 are provided and are arranged along the axial direction. Their main function is to support the cold storage tubes 10 and to create gaps between adjacent cold storage tubes 10.

[0055] The two end caps 9 are respectively provided with a refrigerant inlet and a refrigerant outlet. The end cap 9 with the refrigerant outlet is provided with a cold storage ball 13, and the end cap 9 with the refrigerant inlet is provided with a distributor.

[0056] By setting up the cold storage tube 10 and the cold storage ball 13, the cavity between the phase change cold storage module and the heat exchanger shell 8 is effectively utilized, realizing the efficient utilization of the cold storage heat exchanger space.

[0057] The phase change cold storage module includes multiple sets of cold storage components arranged along the flow direction of the refrigerant. Each set of cold storage components includes multiple horizontally stacked cold storage plates 1, and there are gaps between adjacent cold storage plates 1 for the refrigerant to flow through.

[0058] Since the heat exchanger shell 8 is cylindrical, each group of cold storage components has a different number of cold storage plates 1 arranged from top to bottom. For example, as shown in the figure, each layer at the bottom has 2 cold storage plates 1 (8 layers in total), each layer above it has 4 cold storage plates 1 (10 layers in total), each layer above that has 6 cold storage plates 1 (16 layers in total), each layer above that has 4 cold storage plates 1 (10 layers in total), and each layer at the top has 2 cold storage plates 1 (8 layers in total).

[0059] The heat exchanger shell 8 has a support plate inside that can support the cold storage plate 1, and also has a side plate to prevent the refrigerant from short-circuiting. So the support plate and the side plate are connected in series to form a cylindrical shape with multiple folds. This cylindrical body can be defined as a cold storage plate mounting cylinder.

[0060] In this embodiment, the flow direction of the refrigerant is the axial direction of the heat exchanger. The thickness of the cold storage plate 1 in the same cold storage assembly and the spacing between adjacent cold storage plates 1 are the same. Along the flow direction of the refrigerant, the cold storage assembly exhibits the following pattern: the thickness of the cold storage plate 1 gradually decreases, while the product of the number of cold storage plates 1 and the spacing between adjacent cold storage plates 1 remains unchanged or gradually decreases.

[0061] All the cold storage plates 1 in each cold storage assembly have the same specifications and are filled with the same phase change material. It is foreseeable that, since the thickness of the cold storage plate 1 gradually decreases along the flow direction of the refrigerant, the number of cold storage plates 1 in the cold storage assembly will also tend to increase along the flow direction of the refrigerant.

[0062] The ratio of the thickness of the cold storage plate 1 to the distance between adjacent cold storage plates 1 in the same group is k, where 1≤k≤7. The value of k is different for different cold storage components, and the change of the value of k follows the following pattern: along the flow direction of the refrigerant, k gradually increases.

[0063] The phase change material filled in the cold storage plate 1 in the same group is the same. The phase change material filled in the cold storage plate 1 in different groups of cold storage components is different. The change of the phase change material follows the following pattern: along the flow direction of the refrigerant, the thermal conductivity of the phase change material gradually increases.

[0064] Along the flow direction of the refrigerant, the thickness of the cold storage plate 1 gradually decreases, while the plate spacing remains unchanged or decreases. This ensures that the flow velocity of the refrigerant is consistent at the front and back, or even higher at the back, so that the time for completing the cooling process is consistent. This avoids the situation where the front cold storage plate 1 completes the phase change while the back cold storage plate 1 does not, which would result in a longer cooling time for the entire heat exchanger.

[0065] The cold storage plate 1 includes a cold storage plate body, which has a phase change cold storage material storage cavity. A loading port is provided at one end of the cold storage plate body. Multiple parallel guide grooves 2 are provided on the upper and lower surfaces of the cold storage plate body. Multiple V-shaped protrusions 3 or arc-shaped protrusions are evenly distributed along the length direction 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.

[0066] The loading port of the cold storage plate body is equipped with a loading nozzle and a cap, mainly to facilitate the filling of phase change material into the cold storage plate 1. There are at least two ways to set the loading nozzle:

[0067] The loading port of the cold storage plate is located within a recess, and the loading nozzle is cleverly concealed within this recess. The overall shape of the cold storage plate is relatively regular, but this type of loading nozzle cannot completely fill the interior of the cold storage plate. Some organic phase change materials are liquid at room temperature, but solidify when the temperature drops below their melting point. The volume of organic phase change materials shrinks during solidification because their molecules are relatively loosely arranged in the liquid state, but more densely arranged in the solid state. Even if the material is completely filled, the cold storage plate 1 will not deform during the phase change process.

[0068] Another form is: the loading port of the cold storage plate body is provided with a threaded loading nozzle, and a cap is screwed onto the loading nozzle. The end of the cold storage plate body opposite to the loading nozzle is provided with a clearance groove that is suitable for the shape of the loading nozzle. The clearance groove is provided so that the loading nozzles of adjacent cold storage plates 1 can be placed in the clearance groove when multiple cold storage plates 1 are connected.

[0069] The specific forms of the cold storage plate body are as follows:

[0070] Form 1: such as Figure 9-10 As shown, the material of the cold storage plate body can usually be plastic, such as HDPE and PE. Plastic materials are widely used in the manufacture of cold storage plates 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 reusability.

[0071] 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.

[0072] 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.

[0073] 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 cold storage plate 1 has a strong ability to withstand external pressure and the sealing port does not leak.

[0074] Form 2: such as Figure 11-13 As shown, this form has the same overall structure as <Form 1>, the difference being 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.

[0075] Form 3: such as Figure 14-16As 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.

[0076] 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 regular pattern of "first protrusion 5, second protrusion 6, second protrusion 6, first protrusion 5, second protrusion 6, second protrusion 6, first protrusion 5..."

[0077] On the one hand, the horizontal phase change cold storage heat exchanger of this utility model has a cold storage tube installed in the cavity between the cold storage plate and the cylinder wall, which realizes the efficient utilization of the space of the cold storage heat exchanger.

[0078] On the other hand, the phase change cold storage module of this utility model has a unique design for the thickness of the cold storage plates and the spacing between the plates. Along the flow direction of the refrigerant, the thickness of the cold storage plates gradually becomes thinner. At the same time, 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 velocity of the refrigerant is consistent before and after the flow direction of the refrigerant, or that the flow velocity is higher after the flow direction. This ensures that the time for completing the cooling is consistent before and after the flow direction, and avoids the situation where the front cold storage plate completes the phase change but the rear cold storage plate does not, which would result in a longer cooling time for the entire heat exchanger.

[0079] Cold storage plates utilize their unique design and internal phase change materials to effectively capture the cooling energy carried by the cooling water generated by chillers. These phase change materials possess specific thermodynamic properties and can undergo phase changes at low temperatures, such as changing from a liquid to a solid state or from one crystalline state to another. In this process, they absorb a large amount of latent heat, thereby achieving the storage of cold energy.

[0080] When daytime arrives and peak electricity consumption occurs, the phase change cold storage tank begins to release cooling energy. Through a well-designed heat exchange system, a reverse phase change process occurs within the cold storage tank, transferring the stored cooling energy to the refrigerant. The refrigerant then distributes the cooling energy evenly to various areas of the data center through a precisely designed piping network, effectively reducing the room temperature and meeting the cooling needs of the data center.

[0081] This operating mode effectively achieves peak shaving and valley filling of electricity demand. During peak electricity consumption periods, by utilizing phase change cold storage tanks to release cold for data center cooling, the amount of electricity the data center draws from the grid for cooling is significantly reduced, alleviating the power grid's supply pressure during peak hours. Simultaneously, during off-peak hours, the process of chillers storing cold in the cold storage tanks increases the off-peak electricity load, improving the power system's utilization rate during off-peak periods. This allows for a more rational allocation and utilization of power resources over time, which is of great significance for optimizing the operating efficiency and economy of the power system.

[0082] <Example 2>

[0083] like Figure 7 As shown, the overall structure of the horizontal phase change cold storage heat exchanger in this embodiment is the same as that in <Embodiment 1>, except that: the heat exchanger shell 8 is divided into upper and lower flow channels by a horizontal partition 14, and the first end cap is divided into upper and lower chambers by a horizontal partition 14. The two flow channels are connected by a second end cap. The refrigerant inlet corresponds to the lower chamber of the first end cap, and the refrigerant outlet corresponds to the upper chamber of the first end cap.

[0084] In other words, the horizontal phase change cold storage heat exchanger in this embodiment is a two-pass cold storage heat exchanger. The refrigerant enters the lower channel from the first end cap, then flows into the upper channel from the second end cap, and finally flows out from the first end cap.

[0085] <Example 3>

[0086] like Figure 8 As shown, the overall structure of the horizontal phase change cold storage heat exchanger in this embodiment is the same as that in <Embodiment 1>. The difference is that the heat exchanger is divided into four flow channels by a cross-shaped baffle 15. The four flow channels are connected in series by through holes provided on the cross-shaped baffle 15. The refrigerant inlet is located on the end cap 9 at the beginning of the corresponding flow channel, and the refrigerant outlet is located on the end cap 9 at the end of the corresponding flow channel.

[0087] In other words, the horizontal phase change cold storage heat exchanger in this embodiment is a four-pass cold storage heat exchanger. The refrigerant enters the lower left channel from the first end cap, then flows into the lower right channel from the second end cap, then flows into the upper right channel from the first end cap, then flows into the upper left channel from the second end cap, and finally flows out from the first end cap.

[0088] The specific embodiments of this utility model have been described above. It should be understood that this utility model is not limited to the specific embodiments described above, and those skilled in the art can make various modifications or variations within the scope of the claims, which do not affect the substantive content of this utility model.

Claims

1. A horizontal high-efficiency phase change heat storage heat exchanger, comprising a horizontally placed hollow cylindrical heat exchanger shell (8) and end caps (9) located at both ends of the heat exchanger shell (8), wherein the end caps (9) are provided with a refrigerant inlet and a refrigerant outlet, characterized in that: A phase change cold storage module is provided inside the heat exchanger shell (8). The phase change cold storage module is composed of several horizontally stacked cold storage plates (1). A horizontal flow channel for the refrigerant to flow is formed between adjacent cold storage plates (1). A cold storage pipe (10) is provided in the cavity between the phase change cold storage module and the heat exchanger shell (8).

2. The horizontal high-efficiency phase change heat storage heat exchanger as described in claim 1, characterized in that: A cold storage tube support plate (11) is provided in the cavity between the phase change cold storage module and the heat exchanger shell (8). The cold storage tube support plate (11) is provided with a water permeable hole (16) and an installation hole (12) through which the cold storage tube (10) can pass.

3. The horizontal high-efficiency phase change heat storage heat exchanger as described in claim 1, characterized in that: A cold storage ball (13) is installed inside the end cap (9) which has a refrigerant outlet.

4. The horizontal high-efficiency phase change cold storage heat exchanger as described in claim 3, characterized in that: A distributor is installed inside the head (9) which has a refrigerant inlet.

5. The horizontal high-efficiency phase change heat storage heat exchanger as described in claim 1, characterized in that: The heat exchanger shell (8) is divided into upper and lower flow channels by a horizontal partition (14). The first head is divided into upper and lower chambers by a horizontal partition (14). The two flow channels are connected by a second head. The refrigerant inlet is set in the lower chamber of the first head, and the refrigerant outlet is set in the upper chamber of the first head.

6. The horizontal high-efficiency phase change heat storage heat exchanger as described in claim 1, characterized in that: The heat exchanger is divided into four flow channels by a cross-shaped baffle (15). The four flow channels are connected in series by through holes provided on the cross-shaped baffle (15). The refrigerant inlet is located on the end cap (9) at the beginning of the corresponding flow channel, and the refrigerant outlet is located on the end cap (9) at the end of the corresponding flow channel.

7. The horizontal high-efficiency phase change heat storage heat exchanger as described in claim 1, characterized in that: The phase change cold storage module includes multiple sets of cold storage components arranged along the flow direction of the refrigerant. Each set of cold storage components includes multiple stacked cold storage plates (1). There is a gap between adjacent cold storage plates (1) for the refrigerant to flow. 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 refrigerant, the cold storage components follow the following pattern: the thickness of the cold storage plates (1) gradually decreases, while the product of the number of cold storage plates (1) and the spacing between adjacent cold storage plates (1) remains unchanged or gradually decreases.

8. The horizontal high-efficiency phase change heat storage heat exchanger as described in claim 7, characterized in that: The ratio of the thickness of the cold storage plate (1) in the same group to the distance between adjacent cold storage plates (1) is k, 1≤k≤7. The k values ​​of different cold storage components are different, and the k value changes according to the following pattern: along the flow direction of the refrigerant, k gradually increases.

9. The horizontal high-efficiency phase change cold storage heat exchanger as described in claim 7, characterized in that: The phase change material filled in the cold storage plate (1) in the same group is the same. The phase change material filled in the cold storage plate (1) of different groups of cold storage components is different. The change of phase change material follows the following pattern: along the flow direction of the refrigerant, the thermal conductivity of the phase change material gradually increases.

10. A horizontal high-efficiency phase change heat storage heat exchanger as described in claim 7, characterized in that: The cold storage plate (1) includes a cold storage plate body, which has a phase change cold storage material storage cavity. The upper and lower surfaces of the cold storage plate body are provided with multiple parallel guide grooves (2). The surface of the cold storage plate body is provided with multiple V-shaped protrusions (3) or arc-shaped protrusions along its length direction between two adjacent guide grooves (2) and between the outermost guide groove (2) and the side of the body.

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