Phase change heat storage device with adjustable heat storage capacity for solar refrigeration system

Abstract

The invention discloses a heat storage adjustable phase change device which comprises at least one box body, a high-temperature flow guide layer, a heat exchange layer and a low-temperature flow guide layer are arranged in the box body from top to bottom, and a first flow-equalizing water distributor and a second flow-equalizing water distributor are arranged between every two layers and are communicated through the first flow-equalizing water distributor and the second flow-equalizing water distributor; a heat storage water inlet and a heat release water outlet are formed in the two sides of the high-temperature flow guide layer, and a heat storage water outlet and a heat release water inlet are formed in the two sides of the low-temperature flow guide layer. The heat storage water inlet, the heat storage water outlet, the heat release water inlet and the heat release water outlet among the combined box bodies are respectively communicated through a first pipeline, a second pipeline, a third pipeline and a fourth pipeline, and the quantity of the box bodies for storing heat is controlled by an electromagnetic valve; and the phase change material is arranged in the heat exchange layer. Through temperature stratification and the design of the positions of the water inlet and the water outlet, the heat exchange efficiency of a water body is high, heat energy loss is small, meanwhile, the size and the using amount of the phase-change material heat storage array can be changed according to requirements, and personalized requirements are met.

Description

Technical Field

[0001] The invention relates to the field of phase change energy storage, and in particular to a phase change heat storage device with adjustable heat storage capacity for a solar refrigeration system. Background Art

[0002] Phase change materials have the characteristics of high energy storage density and stable heat release temperature. The use of phase change heat storage technology can solve the problems of unstable heat source and mismatch between heat supply and heat demand in the heating system, and improve energy utilization efficiency. At present, most existing phase change heat storage devices have complex structures, fixed forms, and phase change heat storage materials cannot be flexibly adjusted. In addition, the structure does not consider the temperature stratification effect at different heights in the device. In some industrial application systems, the temperature of the heat source water directly affects the working efficiency of the system. Summary of the invention

[0003] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention proposes a phase change heat storage device with adjustable heat storage capacity for a solar refrigeration system, which can solve the problem that the phase change heat storage material cannot be flexibly adjusted.

[0004] The phase-change heat storage device with adjustable heat storage capacity for a solar refrigeration system according to an embodiment of the present invention comprises:

[0005] At least one box, each of the boxes is connected to each other;

[0006] The interior of each of the boxes is respectively provided with a high-temperature guide layer, a heat exchange layer and a low-temperature guide layer from top to bottom, and a heat storage water inlet and a heat release water outlet are arranged on both sides of the high-temperature guide layer, and a heat storage water outlet and a heat release water inlet are arranged on both sides of the low-temperature guide layer;

[0007] A first flow-evening water distributor is disposed between the high-temperature guide layer and the heat exchange layer, and the high-temperature guide layer and the heat exchange layer are connected through the first flow-evening water distributor;

[0008] A second flow-evening water distributor is disposed between the heat exchange layer and the low-temperature guide layer, and the heat exchange layer and the low-temperature guide layer are connected through the second flow-evening water distributor;

[0009] The phase change material heat storage array is arranged in the heat exchange layer.

[0010] According to some embodiments of the present invention, there are multiple boxes. After the multiple boxes are combined, the heat storage water inlet between each box is connected by a first pipe, the heat storage water outlet between each box is connected by a second pipe, the heat release water inlet between each box is connected by a third pipe, and the heat release water inlet between each box is connected by a fourth pipe; each of the first pipe, the second pipe, the third pipe and the fourth pipe is provided with a solenoid valve.

[0011] According to some embodiments of the present invention, the interior of the box further includes:

[0012] A first partition is provided with a first opening, the high-temperature guide layer and the heat exchange layer are separated by the first partition, the first flow equalizing water distributor is provided on the first partition, and the first opening is communicated with the first flow equalizing water distributor;

[0013] The second partition is provided with a second opening, the heat exchange layer and the low-temperature guide layer are separated by the second partition, the second flow equalizing water distributor is arranged on the second partition, and the second opening is connected to the second flow equalizing water distributor.

[0014] According to some embodiments of the present invention, the heat storage water inlet and the heat storage water outlet are arranged diagonally; the heat release water outlet and the heat release water inlet are arranged diagonally.

[0015] According to some embodiments of the present invention, a first guide baffle is provided in the high-temperature guide layer, and a second guide baffle is provided in the low-temperature guide layer; a plurality of first through holes are provided on both the first guide baffle and the second guide baffle; the first through holes on the first guide baffle are connected to the heat storage water inlet, the heat release water outlet and the first flow equalizing water distributor; the first through holes on the second guide baffle are connected to the heat storage water outlet, the heat release water inlet and the second flow equalizing water distributor.

[0016] According to some embodiments of the present invention, the first flow balancing water distributor and the second flow balancing water distributor are both provided with a plurality of second through holes;

[0017] Among them, the heat storage water inlet, the heat release water outlet, and the first through hole on the first guide baffle are all connected to the second through hole of the first flow equalizing water distributor; the heat storage water outlet, the heat release water inlet, and the first through hole on the second guide baffle are all connected to the second through hole of the second flow equalizing water distributor.

[0018] According to some embodiments of the present invention, a fixed baffle is also provided inside the box body, and the fixed baffle is provided on the heat exchange layer. The fixed baffle is used to fix the phase change material heat storage array, and a diversion opening is provided on the fixed baffle, and the diversion opening is respectively connected to the first flow equalizing water distributor and the second flow equalizing water distributor.

[0019] According to some embodiments of the present invention, a sliding groove is provided on the fixed baffle plate, a limit baffle is provided in the sliding groove, and the limit baffle plate can adjust its position through the sliding groove.

[0020] According to some embodiments of the present invention, it is characterized in that the position of the limit baffle is adjusted and fixed in the sliding groove by screws.

[0021] According to some embodiments of the present invention, the phase change material heat storage array includes a plurality of phase change heat exchange units, which are arranged at equal intervals inside the heat exchange layer, and the phase change heat exchange units are clamped by the outer side of the limiting baffle and the inner wall of the box, and the phase change heat exchange unit and the limiting baffle are in a vertical relationship.

[0022] The phase-change heat storage device with adjustable heat storage capacity for a solar refrigeration system according to an embodiment of the present invention has at least the following beneficial effects:

[0023] The number of boxes can be changed according to the heat storage demand. During the hot water storage process, if a large amount of hot water is required, in order to speed up the heat storage speed of the device, multiple boxes can be connected to hot water, that is, the heat storage water inlets of multiple boxes can be connected to hot water for heat exchange at the same time to improve the heat storage efficiency; when the amount of hot water required is small, the heat storage water inlets of a few boxes can be connected to hot water for heat exchange to quickly meet user needs. By designing the high-temperature guide layer, the heat exchange layer and the low-temperature guide layer in the box from top to bottom, the transfer of heat energy in different intervals is realized. When the cold water flows out from bottom to top, the heat exchange time can be extended in the heat exchange layer and the heat exchange can be fully carried out. The phase change material heat storage array in the heat exchange layer can make full use of the characteristics of phase change heat storage for efficient energy storage, improve the heat exchange efficiency, and reduce the capacity and volume of the device when storing the same heat energy. At the same time, the arrangement design of the inlet and outlet and the design of the uniform flow water distributor reduce the loss of heat energy during the conversion and transmission process, avoid local overheating of the phase change material, improve the efficiency of heat conduction, and extend the service life of the phase change material.

[0024] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0026] Figure 1 It is a structural schematic diagram of a plurality of box combinations of a phase-change heat storage device with adjustable heat storage capacity for a solar refrigeration system according to an embodiment of the present invention;

[0027] Figure 2 It is a structural schematic diagram of a single box of a phase-change heat storage device with adjustable heat storage capacity for a solar refrigeration system according to an embodiment of the present invention;

[0028] Figure 3A front view of a single box of a phase-change heat storage device with adjustable heat storage capacity for a solar refrigeration system according to an embodiment of the present invention;

[0029] Figure 4 It is a left view of a single box of the phase-change heat storage device with adjustable heat storage capacity for a solar refrigeration system according to an embodiment of the present invention;

[0030] Figure 5 A structural diagram of a fixed baffle of a phase-change heat storage device with adjustable heat storage capacity for a solar refrigeration system according to an embodiment of the present invention;

[0031] Reference numerals:

[0032] Box body 100, high-temperature guide layer 101, heat exchange layer 102, low-temperature guide layer 103, heat storage water inlet 201, heat storage water outlet 202, heat release water inlet 203, heat release water outlet 204, first guide baffle 301, second guide baffle 302, first through hole 303, first flow equalizing water distributor 401, second flow equalizing water distributor 402, second through hole 403, fixed baffle 500, limiting baffle 501, sliding groove 502, screw 503, guide opening 504, phase change material heat storage array 600, phase change heat exchange unit 601, first partition 701, second partition 702, first pipeline 801, second pipeline 802, third pipeline 803, fourth pipeline 804. DETAILED DESCRIPTION

[0033] This section will describe in detail the specific embodiments of the present invention. The preferred embodiments of the present invention are shown in the accompanying drawings. The purpose of the accompanying drawings is to supplement the description of the text part of the specification with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the present invention, but it cannot be understood as a limitation on the scope of protection of the present invention.

[0034] In the description of the present invention, it should be understood that descriptions involving orientations, such as up, down, front, back, left, right, etc., and orientations or positional relationships indicated are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0035] In the description of the present invention, "several" means one or more, "more" means more than two, "greater than", "less than", "exceed" etc. are understood as not including the number itself, and "above", "below", "within" etc. are understood as including the number itself. If there is a description of "first" or "second", it is only used for the purpose of distinguishing the technical features, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0036] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, connecting, etc. should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

[0037] The embodiment of the present invention provides a phase change heat storage device with adjustable heat storage amount, including at least one box 100 , wherein the box 100 includes a first flow equalizing water distributor 401 , a second flow equalizing water distributor 402 and a phase change material heat storage array 600 . The interior of the box 100 is composed of a high-temperature guide layer 101, a heat exchange layer 102 and a low-temperature guide layer 103 from top to bottom. A heat storage water inlet 201 and a heat release water outlet 204 are arranged on both sides of the high-temperature guide layer 101, and a heat storage water outlet 202 and a heat release water inlet 203 are arranged on both sides of the low-temperature guide layer 103; a first flow equalizing water distributor 401 is arranged between the high-temperature guide layer 101 and the heat exchange layer 102, and the high-temperature guide layer 101 and the heat exchange layer 102 are connected through the first flow equalizing water distributor 401; a second flow equalizing water distributor 402 is arranged between the heat exchange layer 102 and the low-temperature guide layer 103, and the heat exchange layer 102 and the low-temperature guide layer 103 are connected through the second flow equalizing water distributor 402; a phase change material heat storage array 600 is arranged in the heat exchange layer 102.

[0038] like Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, in this example, there is at least one box 100, and each box 100 is interconnected; the interior of the box 100 is respectively composed of a high-temperature guide layer 101, a heat exchange layer 102 and a low-temperature guide layer 103 from top to bottom, and heat storage water inlets 201 and heat release water outlets 204 are arranged on both sides of the high-temperature guide layer 101, and heat storage water outlets 202 and heat release water inlets 203 are arranged on both sides of the low-temperature guide layer 103. The hot water coming in from the heat storage water inlet 201 passes through the first flow equalizing water distributor 401 from the high-temperature guide layer 101, and exchanges heat with the phase change material heat storage array 600 from top to bottom by releasing heat; the cold water coming in from the heat release water inlet 203 passes through the second flow equalizing water distributor 402 from the low-temperature guide layer 103, and exchanges heat from the phase change material heat storage array 600 from bottom to top by absorbing heat from the phase change material heat storage array 600. Usually, a water pump is provided outside the box body 100 to pump water from the heat release outlet 204. Since the heat storage water inlet 201 and the heat release outlet 204 are both in the high-temperature guide layer 101, when the water pump is working, the hot water at the heat storage water inlet 201 is preferentially discharged from the heat release outlet 204 without the need for heat exchange through the phase change material heat storage array 600, thereby reducing the loss of heat energy and increasing the outlet water temperature of the heat release outlet 204.

[0039] It is understandable that when the present invention is used in a solar refrigeration system, the water pump can be adjusted according to the demand for refrigeration power, thereby adjusting the water output speed to cool the external refrigeration system.

[0040] Furthermore, if Figure 1 As shown, in some embodiments of the present invention, the box 100 has multiple heat storage water inlets 201 between each box 100 are connected through a first pipe 801, the heat storage water outlets 202 between each box 100 are connected by a second pipe 802, the heat release water inlets 203 between each box 100 are connected through a third pipe 803, and the heat release water outlets 204 between each box 100 are connected through a fourth pipe 804. Each of the first pipe 801, the second pipe 802, the third pipe 803 and the fourth pipe 804 is provided with a solenoid valve. Control the inflow and outflow of water to switch the heat storage quantity of the box 100. During the hot water storage process, if a large amount of hot water is required, in order to speed up the heat storage speed of the device, the solenoid valve can be used to control the first pipes 801 of multiple boxes 100 to pass hot water, that is, the heat storage water inlets 201 of multiple boxes are simultaneously filled with hot water for heat exchange, thereby improving the heat storage efficiency; when the required amount of hot water is small, the solenoid valve can be used to control the heat storage water inlets 201 of a few boxes 100 to enter hot water for heat exchange, thereby quickly meeting user needs.

[0041] It is understandable that when the heat storage water inlet 201 of one of the boxes 100 is closed, its corresponding heat storage water outlet 202 will also be closed. After the box 100 has been working for a period of time, that is, when the heat of the phase change material heat storage array 600 is released to a certain extent, the heat release water inlet 203 and the heat release water outlet 204 are closed.

[0042] It should be understood that whether to use or how much of the total heat storage capacity of the phase change material heat storage array 600 to use needs to be dynamically adjusted according to the device load demand and the existing total heat storage capacity.

[0043] Furthermore, if Figure 2 , Figure 3 and Figure 4As shown, in some embodiments of the present invention, the interior of the box 100 further includes a first partition 701 and a second partition 702. The first partition 701 is provided with a first opening, the high-temperature guide layer 101 and the heat exchange layer 102 are separated by the first partition 701, the first flow equalizing water distributor 401 is arranged on the first partition 701, and the first opening is communicated with the first flow equalizing water distributor 401; the second partition 702 is provided with a second opening, the heat exchange layer 102 and the low-temperature guide layer 103 are separated by the second partition 702, the second flow equalizing water distributor 402 is arranged on the second partition 702, and the second opening is communicated with the second flow equalizing water distributor 402. Through the layered design, the high-temperature guide layer can better maintain a higher water temperature than the heat exchange layer 102 and the low-temperature guide layer 103, reducing the loss of heat energy. At the same time, the first partition 701 and the second partition 702 can also play a role in stabilizing the water flow, preventing the water pressure fluctuations at the inlet and outlet from causing adverse effects on the box 100.

[0044] Furthermore, if Figure 1 , Figure 2 and Figure 3 As shown, in some embodiments of the present invention, the thermal storage water inlet 201 and the thermal storage water outlet 202 are arranged diagonally; Figure 2 , Figure 3 As shown, the left side of the box 100 is the first side of the box 100, and the right side of the box 100 is the second side of the box 100. The heat storage water inlet 201 is arranged at the upper right of the first side of the box 100, and the heat storage water outlet 202 is arranged at the lower left of the first side of the box 100; the heat release water outlet 204 and the heat release water inlet 203 are arranged diagonally, the heat release water outlet 204 is arranged at the upper right of the second side of the box 100, and the heat release water inlet 203 is arranged at the lower left of the second side of the box 100, so that the path of the water flow is increased, the contact time between the fluid and the phase change material heat storage array is increased, the heat exchange efficiency is improved, and the heat energy loss is reduced. At the same time, the arrangement of the positions of the heat storage water inlet 201 and the heat release water outlet 204 allows the hot water of the heat storage water inlet 201 to go out from the heat release water outlet 204 first when the water pump is working, reducing the loss of heat energy and increasing the outlet water temperature of the heat release water outlet 204.

[0045] Furthermore, if Figure 2 , Figure 3 and Figure 4As shown, in some embodiments of the present invention, a first guide baffle 301 is provided in the high-temperature guide layer 101, and a second guide baffle 302 is provided in the low-temperature guide layer 103; a plurality of first through holes 303 are provided on both the first guide baffle 301 and the second guide baffle 302; the first through holes 303 on the first guide baffle 301 are connected with the heat storage water inlet 201, the heat release water outlet 204 and the first flow equalizing water distributor 401; the first through holes 303 on the second guide baffle 302 are connected with the heat storage water outlet 202, the heat release water inlet 203 and the second flow equalizing water distributor 402. The first through holes 303 on the first guide baffle 301 can divert the hot water of the heat storage water inlet 201, so that the water in the high-temperature guide layer 101 can be fully mixed with the hot water coming in from the heat storage water inlet 201, and the temperature of the water in the high-temperature guide layer 101 can be kept uniform. Similarly, the first through hole 303 on the second guide baffle 302 can divert the cold water of the heat release water inlet 203, so that the water in the low-temperature guide layer 103 can be fully mixed with the cold water coming in from the heat release water inlet 203, thereby maintaining the uniform temperature of the water in the low-temperature guide layer 103. When exchanging heat through the heat exchange layer 102, the phase change material heat storage array 600 can release heat evenly, thereby extending the service life of the phase change material heat storage array 600.

[0046] Furthermore, if Figure 2 , Figure 3 and Figure 4 As shown, in some embodiments of the present invention, the first flow-equalizing water distributor 401 and the second flow-equalizing water distributor 402 are both provided with a plurality of second through holes 403; wherein the heat storage water inlet 201, the heat release water outlet 204, and the first through hole 303 on the first flow guide baffle 301 are all connected to the second through hole 403 of the first flow-equalizing water distributor; the heat storage water outlet 202, the heat release water inlet 203, and the first through hole 303 on the second flow guide baffle 302 are all connected to the second through hole 403 of the second flow-equalizing water distributor 401. When the fluid enters the heat exchange layer 102 from the high-temperature guide layer 101 or the low-temperature guide layer 103, it will flow into the heat exchange layer 102 from the second through hole 403 of the first flow-equalizing water distributor 401 or the second flow-equalizing water distributor 402, thereby avoiding uneven distribution of flow and water pressure, increasing the contact area between the water flow and the phase change material heat storage array 600, and improving the heat exchange efficiency. In this embodiment, the first partition 701, the second partition 702, the first flow guide baffle 301, the second flow guide baffle 302, the first flow equalizing water distributor 401 and the second flow equalizing water distributor 402 are welded as a whole and suspended in the box 100 by a support frame welded to the inner wall of the box 100. When the phase change material heat storage array 600 in the box 100 needs to be replaced or adjusted, it can be easily disassembled.

[0047] Furthermore, if Figure 2 , Figure 3 , Figure 4 and Figure 5 As shown, in some embodiments of the present invention, a fixed baffle 500 is further provided inside the box 100, and the fixed baffle 500 is provided on the heat exchange layer 102. The fixed baffle 500 is used to fix the phase change material heat storage array 600, and a diversion opening 504 is provided on the fixed baffle 500, and the diversion opening 504 is respectively connected to the first flow equalizing water distributor 401 and the second flow equalizing water distributor 402. The diversion opening 504 provided on the fixed baffle 500 avoids uneven distribution of flow and water pressure, increases the contact area between the water flow and the phase change material heat storage array 600, and improves the heat exchange efficiency. It can be understood that the diversion opening 504 can be a rectangular or circular shape or other achievable shapes.

[0048] Furthermore, if Figure 5 As shown, in some embodiments of the present invention, a sliding groove 502 is provided on the fixed baffle 500, and a limiting baffle 501 is provided in the sliding groove 502. The limiting baffle 501 can adjust its position through the sliding groove 502, so that the required size and usage of the phase change material heat storage array 600 can be flexibly selected.

[0049] Furthermore, if Figure 3 , Figure 4 and Figure 5 As shown, in some embodiments of the present invention, the limiting baffle 501 is adjusted and fixed in position in the sliding groove 502 by means of screws 503, and the tightness of the screws is adjusted so that the limiting baffle 502 can fix the phase change heat transfer unit 601. In this embodiment, the phase change heat transfer unit 601 is arranged close to the box body 100, which increases the heat transfer resistance between the box body 100 and the outside world and reduces the heat energy loss.

[0050] Furthermore, if Figure 3 and Figure 4 As shown, in some embodiments of the present invention, the phase change material heat storage array 600 includes a plurality of phase change heat exchange units 601, which are arranged at equal intervals inside the heat exchange layer 102. Due to the presence of an external water pump, the water pump draws water from the box 100 from bottom to top, so that the water in the low-temperature guide layer 103 exchanges heat through the phase change heat exchange unit 601 of the heat exchange layer 102, and then discharges water from the high-temperature guide layer 101 through the heat release outlet 204. In this embodiment, the phase change heat exchange unit 601 is plate-shaped, and the shell material is 6113 aluminum alloy material with a thickness of no more than 1 mm.

[0051] Furthermore, if Figure 3 , Figure 4 and Figure 5As shown, in some embodiments of the present invention, the phase change heat exchange unit 601 is clamped by the outer side of the limiting baffle 501 and the inner wall of the box body 100, and the phase change heat exchange unit 601 and the limiting baffle 501 are in a vertical relationship, which facilitates the installation and removal of the phase change heat exchange unit 601. It can be understood that the number of limiting baffles 501 is at least 2, and multiple groups of phase change heat exchange units 601 are installed.

[0052] According to the phase-change heat storage device with adjustable heat storage for solar refrigeration system of the present invention, the number of boxes 100 can be changed according to the heat storage demand. During the hot water heat storage process, if the amount of hot water required is large, in order to speed up the heat storage speed of the device, it can be controlled by solenoid valve so that multiple boxes 100 are connected with hot water, that is, the heat storage water inlets of multiple boxes 100 are simultaneously filled with hot water for heat exchange, thereby improving the heat storage efficiency; when the amount of hot water required is small, it can be controlled by solenoid valve so that the heat storage water inlets of a few boxes 100 are filled with hot water for heat exchange, thereby quickly meeting the needs of users. By designing the high-temperature guide layer 101, the heat exchange layer 102 and the low-temperature guide layer 103 in sequence from top to bottom inside the box 100, the transfer of heat energy in different intervals is realized. When the cold water flows out from bottom to top, the heat exchange time can be extended in the heat exchange layer 102, and the heat exchange can be fully performed. The phase change material heat storage array 600 in the heat exchange layer 102 can fully utilize the characteristics of phase change heat storage for efficient energy storage, improve heat exchange efficiency, and reduce the volume of the device while storing the same amount of heat. At the same time, the arrangement design of the water inlet and outlet and the design of the flow-balanced water distributor reduce the loss of heat energy during the conversion and transmission process, avoid local overheating of the phase change material, improve the efficiency of heat conduction, and extend the service life of the phase change material.

[0053] According to the traditional design process, the physical system is generally designed first, and then the controller is designed. This control method ignores the coupling relationship between the physical system and the controller, and unilaterally pursues physical system indicators during the design process, which makes subsequent control difficult. In the present invention, the collaborative optimization design considers the design of the physical system and the controller at the same time, optimizes the hardware design parameters and control strategies in the same framework, improves the flexibility of system design, expands the design space, and improves the overall closed-loop performance of the system. In the structure of this heat storage device, factors such as the number of boxes 100 and the number and spacing of phase change heat units 601 in the box 100 will affect the total amount of heat storage and the heat storage and heat release efficiency. In the actual control process, these factors will affect the inability to meet the heat storage requirements or weaken the control effect, affecting the system efficiency. In the present invention, these factors can be flexibly adjusted to improve the control effect and optimize the overall efficiency of the system.

[0054] In the description of this specification, the description with reference to the terms "one embodiment", "further embodiments", "some specific embodiments" or "some examples" etc. means that the specific features, structures or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0055] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A phase-change heat storage device with adjustable heat storage capacity for a solar refrigeration system, characterized in that: include: At least one box, each of the boxes is connected to each other; The interior of each of the boxes is respectively provided with a high-temperature guide layer, a heat exchange layer and a low-temperature guide layer from top to bottom, and a heat storage water inlet and a heat release water outlet are arranged on both sides of the high-temperature guide layer, and a heat storage water outlet and a heat release water inlet are arranged on both sides of the low-temperature guide layer; A first flow-evening water distributor is disposed between the high-temperature guide layer and the heat exchange layer, and the high-temperature guide layer and the heat exchange layer are connected through the first flow-evening water distributor; A second flow-evening water distributor is disposed between the heat exchange layer and the low-temperature guide layer, and the heat exchange layer and the low-temperature guide layer are connected through the second flow-evening water distributor; The phase change material heat storage array is arranged in the heat exchange layer.

2. The phase-change heat storage device with adjustable heat storage capacity for a solar refrigeration system according to claim 1 is characterized in that: There are multiple boxes, the heat storage water inlets between each box are connected by a first pipe, the heat storage water outlets between each box are connected by a second pipe, the heat release water inlets between each box are connected by a third pipe, and the heat release water inlets between each box are connected by a fourth pipe; each of the first pipe, the second pipe, the third pipe and the fourth pipe is provided with a solenoid valve.

3. The phase-change heat storage device with adjustable heat storage capacity for a solar refrigeration system according to claim 1, characterized in that: The box body also includes: A first partition is provided with a first opening, the high-temperature guide layer and the heat exchange layer are separated by the first partition, the first flow equalizing water distributor is provided on the first partition, and the first opening is communicated with the first flow equalizing water distributor; The second partition is provided with a second opening, the heat exchange layer and the low-temperature guide layer are separated by the second partition, the second flow equalizing water distributor is arranged on the second partition, and the second opening is connected to the second flow equalizing water distributor.

4. The phase-change heat storage device with adjustable heat storage capacity for a solar refrigeration system according to claim 1, characterized in that: The heat storage water inlet and the heat storage water outlet are arranged diagonally; the heat release water outlet and the heat release water inlet are arranged diagonally.

5. The phase-change heat storage device with adjustable heat storage capacity for a solar refrigeration system according to claim 1, characterized in that: A first guide baffle is arranged in the high-temperature guide layer, and a second guide baffle is arranged in the low-temperature guide layer; a plurality of first through holes are arranged on the first guide baffle and the second guide baffle; the first through holes on the first guide baffle are connected with the heat storage water inlet, the heat release water outlet and the first flow equalizing water distributor; the first through holes on the second guide baffle are connected with the heat storage water outlet, the heat release water inlet and the second flow equalizing water distributor.

6. The phase-change heat storage device with adjustable heat storage capacity for a solar refrigeration system according to claim 5, characterized in that: The first flow-evening water distributor and the second flow-evening water distributor are both provided with a plurality of second through holes; Among them, the heat storage water inlet, the heat release water outlet, and the first through hole on the first guide baffle are all connected to the second through hole of the first flow equalizing water distributor; the heat storage water outlet, the heat release water inlet, and the first through hole on the second guide baffle are all connected to the second through hole of the second flow equalizing water distributor.

7. The phase-change heat storage device with adjustable heat storage capacity for a solar refrigeration system according to claim 1, characterized in that: A fixed baffle is also provided inside the box body, and the fixed baffle is arranged on the heat exchange layer. The fixed baffle is used to fix the phase change material heat storage array, and a diversion opening is provided on the fixed baffle, and the diversion opening is respectively connected to the first flow equalizing water distributor and the second flow equalizing water distributor.

8. The phase-change heat storage device with adjustable heat storage capacity for a solar refrigeration system according to claim 7, characterized in that: The fixed baffle is provided with a sliding groove, a limit baffle is provided in the sliding groove, and the limit baffle can adjust the position through the sliding groove.

9. The phase-change heat storage device with adjustable heat storage capacity for a solar refrigeration system according to claim 8, characterized in that: The position of the limit baffle is adjusted and fixed in the sliding groove by screws.

10. The phase-change heat storage device with adjustable heat storage capacity for a solar refrigeration system according to claim 8, characterized in that: The phase change material heat storage array includes a plurality of phase change heat exchange units, which are arranged at equal intervals inside the heat exchange layer. The phase change heat exchange units are clamped by the outer side of the limiting baffle and the inner wall of the box, and the phase change heat exchange units and the limiting baffle are in a vertical relationship.

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