Phase change energy storage heat exchanger

Abstract

The present invention relates to the field of heat exchange equipment, and specifically to a phase change energy storage heat exchanger, including a heat exchange plate, a V-shaped containing plate and a sealing bottom plate; a plurality of heat exchange plates are stacked on the sealing bottom plate in sequence; a trapezoidal notch is provided on each heat exchange plate, and a plurality of V-shaped containing plates are slidably provided in each trapezoidal notch; a plurality of trapezoidal flow channels are formed between the V-shaped containing plate and the heat exchange plate; a liquid discharge groove and a liquid inlet groove are provided on each heat exchange plate, the liquid discharge groove is connected to the trapezoidal flow channel through a flow hole, the liquid inlet groove is connected to the trapezoidal flow channel through a connecting pipe, and a liquid outlet and a liquid inlet are provided in the liquid discharge groove and the liquid inlet groove; a phase change groove is provided on each heat exchange plate, and the V-shaped containing plate and the phase change groove are connected through a conveying pipe; a feeding port is provided in the phase change groove; and a transition chamber connected to the feeding port is also provided inside each heat exchange plate. When the fluid circulates, the corresponding trapezoidal flow channel can expand, increase the contact area with the phase change material, and enable the phase change material to reach the phase change point faster.

Description

Technical Field

[0001] The invention relates to the field of heat exchange equipment, and in particular to a phase-change energy storage heat exchanger. Background Art

[0002] In industrial production, there are various heat transfer processes. In order to meet certain process requirements, special equipment needs to be designed to ensure that these heat transfer processes are carried out according to the predetermined requirements. These heat transfer devices are heat exchangers. Usually, we call the devices used to transfer heat from high-temperature fluid to low-temperature fluid as heat exchangers. It is one of the main equipment to improve energy utilization.

[0003] Chinese Patent: CN212006867U; discloses a new type of dual-channel plate-fin phase change heat accumulator, which is mainly composed of a heat exchange plate and a phase change material. The dual-channel heat exchange plate includes: a hollow plate welded from two metal plates, a dual-channel distribution is welded in the plate, and after high-pressure expansion, a dual-channel heat exchange plate is formed for different fluids to flow through. The plates are fixed by connectors to form a heat exchange plate group, and phase change materials are filled in the gaps between the plates for energy storage. Due to the low thermal conductivity of the phase change material, fins are further processed on the outer surface of the plate to enhance the heat transfer of the phase change material. The new dual-channel plate-fin phase change heat accumulator has the advantages of large heat exchange area, high energy storage density, fast heat transfer rate, and wide range of applications.

[0004] However, in this application, the dual channels inside the dual-channel heat exchange plate are used to allow the heating fluid or the cold fluid to flow through separately. When the heating fluid flows through, the solid phase change material melts due to heat and stores energy; while when the cold fluid passes through, the system is cooled, the liquid phase change material releases latent heat and becomes solid, and the temperature of the cold fluid increases. Therefore, the flow channels of the heating fluid and the cold fluid are isolated from each other, and each occupies part of the space, so that when the heating fluid flows through, the cold fluid flow channel is equivalent to an idle state and occupies a larger space in the heat accumulator, while when the cold fluid flows through, the heating fluid flow channel is equivalent to an idle state, resulting in low space utilization in the phase change heat accumulator, and then causing problems such as low heat exchange efficiency. Summary of the invention

[0005] In view of the problems existing in the existing technology, a phase change energy storage heat exchanger is provided. A plurality of trapezoidal flow channels are formed by the cooperation of a V-shaped containing plate and a heat exchange plate. Heat is exchanged between cold fluid and hot fluid through the plurality of trapezoidal flow channels and a phase change material. When the hot fluid circulates, the corresponding trapezoidal flow channels can be expanded, thereby increasing the contact area with the phase change material, so that the phase change material can reach the phase change point faster.

[0006] In order to solve the problems of the prior art, the technical solution adopted by the present invention is:

[0007] A phase-change energy storage heat exchanger comprises a heat exchange plate, a V-shaped receiving plate and a sealing bottom plate; there are a plurality of heat exchange plates, and the plurality of heat exchange plates are sequentially stacked on the sealing bottom plate; a trapezoidal notch is arranged at the center of each heat exchange plate, and a plurality of V-shaped receiving plates are slidably arranged in each trapezoidal notch; a receiving cavity for receiving a phase-change material is formed between the V-shaped receiving plate, the trapezoidal notch and adjacent heat exchange plates; a plurality of trapezoidal flow channels for fluid to pass through are formed between the plurality of V-shaped receiving plates and two adjacent heat exchange plates;

[0008] Two drainage grooves are mirror-imaged on each heat exchange plate, and the two drainage grooves are located on both sides of the corresponding trapezoidal notch. The inner wall of each drainage groove close to the trapezoidal notch is provided with a plurality of flow holes connected to the corresponding trapezoidal flow channel; and two liquid outlets connected to the corresponding drainage grooves are mirror-imaged on the side of each heat exchange plate away from the trapezoidal notch.

[0009] Each heat exchange plate is also provided with two liquid inlet grooves, which are located on the side of the corresponding liquid discharge groove away from the trapezoidal notch. A plurality of delivery holes are provided on the inner wall of the side of each liquid inlet groove close to the liquid inlet groove, and the delivery holes on both sides of the trapezoidal notch are arranged alternately in sequence; each delivery hole is connected to the corresponding flow hole through a connecting pipe; and two liquid inlets connected to the corresponding liquid inlet grooves are mirror-imaged on the side of each heat exchange plate away from the trapezoidal notch;

[0010] Phase change grooves for accommodating phase change materials are arranged at both ends of each trapezoidal notch, and a plurality of V-shaped accommodating plates and two phase change grooves are connected through a conveying pipe; two feeding ports connected to the corresponding phase change grooves are arranged on a mirror image on one side of each heat exchange plate away from the trapezoidal notch;

[0011] Each heat exchange plate is also provided with a transition cavity for placing phase change material. The transition cavity is located below the corresponding trapezoidal notch and is communicated with two adjacent feeding ports.

[0012] Preferably, a plurality of support rods are provided on both side outer walls of each V-shaped containing plate along the length direction, and a universal ball is provided at one end of each support rod away from the V-shaped containing plate.

[0013] Preferably, a first sealing strip is provided at both ends of the top of each V-shaped containing plate along the length direction, a strip-shaped mounting groove is provided at the lower end of each V-shaped containing plate, and an inverted Y-shaped second sealing strip is provided in the strip-shaped mounting groove.

[0014] Preferably, the delivery pipe has a certain degree of elasticity.

[0015] Preferably, each connecting pipe extends into the interior of the corresponding trapezoidal flow channel.

[0016] Preferably, a plurality of reinforcing ribs are arranged inside each V-shaped containing plate.

[0017] Preferably, a sealing strip is provided on one side of each heat exchange plate close to the trapezoidal notch.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] 1. In the present application, through the cooperation of the V-shaped containment plate and the heat exchange plate, the two liquid inlets can respectively transport hot fluid and cold fluid; when only hot fluid or cold fluid is flowing, the V-shaped containment plate can slide, so that the trapezoidal flow channel where the fluid is located can be expanded, which can not only increase the flow rate of the fluid per unit time, but also increase the contact area between the fluid and the phase change material, thereby improving the heat exchange efficiency between the fluids.

[0020] 2. The present application arranges a plurality of support rods on both sides of the V-shaped containing plate, and each support rod is provided with a universal ball. When only a single fluid passes through, the fluid moves in the trapezoidal flow channel, and the pressure generated can make the V-shaped moving plate slide. The arrangement of the universal ball and the support rod can ensure the stability of the movement of the V-shaped containing plate.

[0021] 3. The present application is provided with a delivery pipe which has a certain degree of elasticity. When a cold fluid or a hot fluid circulates, due to the different impact forces of the fluids, the V-shaped containment plates on both sides of the trapezoidal flow channel can move repeatedly, thereby colliding with the fluid in the trapezoidal flow channel. This can not only disturb the fluid in the trapezoidal flow channel, but also shake the phase change material, thereby improving the thermal interaction effect of the fluid. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a three-dimensional diagram of a phase-change energy storage heat exchanger;

[0023] Figure 2 It is a three-dimensional exploded diagram of a phase-change energy storage heat exchanger;

[0024] Figure 3 It is a top view of a phase change energy storage heat exchanger;

[0025] Figure 4 yes Figure 3 Plane section view along AA direction;

[0026] Figure 5 yes Figure 4 A partial enlarged view of point B in the middle;

[0027] Figure 6 yes Figure 3 Plane section view along CC direction;

[0028] Figure 7 yes Figure 3 Plane section view along DD direction;

[0029] Figure 8 It is a three-dimensional exploded view of the heat exchange plate and the sealing strip in a phase-change energy storage heat exchanger;

[0030] Fig. 9 It is a partial top view of a phase change energy storage heat exchanger;

[0031] Fig.10 yes Fig. 9 Plane cross-sectional view along the EE direction.

[0032] The numbers in the figure are:

[0033] 1-heat exchange plate; 11-trapezoidal notch; 12-liquid drain groove; 121-circulation hole; 13-liquid outlet; 14-liquid inlet groove; 141-transmission hole; 142-connecting pipe; 15-liquid inlet; 16-phase change groove; 17-feeding port; 18-conversion chamber; 19-first perforation; 110-sealing strip;

[0034] 2-V-shaped receiving plate; 21-transport pipe; 22-support rod; 221-universal ball; 23-first sealing strip; 24-strip mounting groove; 25-second sealing strip; 26-reinforcement rib;

[0035] 3-sealed bottom plate; 31-second perforation;

[0036] 4-accommodating cavity;

[0037] 5- Trapezoidal flow channel. DETAILED DESCRIPTION

[0038] In order to further understand the features, technical means, specific objectives and functions of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0039] See also Figures 1 to 10As shown, a phase change energy storage heat exchanger comprises a heat exchange plate 1, a V-shaped receiving plate 2 and a sealing bottom plate 3; there are a plurality of heat exchange plates 1, and the plurality of heat exchange plates 1 are sequentially stacked on the sealing bottom plate 3; a trapezoidal notch 11 is provided at the center of each heat exchange plate 1, and a plurality of V-shaped receiving plates 2 are slidably provided in each trapezoidal notch 11; a receiving cavity 4 for receiving phase change material is formed between the V-shaped receiving plate 2, the trapezoidal notch 11 and the adjacent heat exchange plates 1; a plurality of V-shaped receiving plates 2 and two phase A plurality of trapezoidal channels 5 for fluid to pass through are formed between adjacent heat exchange plates 1; two drainage grooves 12 are mirror-imaged on each heat exchange plate 1, and the two drainage grooves 12 are located on both sides of the corresponding trapezoidal notch 11, and a plurality of flow holes 121 connected to the corresponding trapezoidal channels 5 are arranged on the inner wall of one side of each drainage groove 12 close to the trapezoidal notch 11; two liquid outlets 13 connected to the corresponding drainage grooves 12 are mirror-imaged on one side of each heat exchange plate 1 away from the trapezoidal notch 11; each heat exchange plate 1 is also provided with There are two liquid inlet grooves 14, which are located on the side of the corresponding liquid discharge groove 12 away from the trapezoidal groove 11. A plurality of conveying holes 141 are arranged on the inner wall of the side of each liquid inlet groove 14 close to the liquid inlet groove 14, and the conveying holes 141 located on both sides of the trapezoidal groove 11 are arranged alternately in sequence; each conveying hole 141 is connected to the corresponding flow hole 121 through a connecting pipe 142; two liquid inlets 15 connected to the corresponding liquid inlet grooves 14 are arranged in a mirror image on the side of each heat exchange plate 1 away from the trapezoidal groove 11; phase change grooves 16 for accommodating phase change materials are arranged at both ends of each trapezoidal groove 11, and a plurality of V-shaped accommodating plates 2 and two phase change grooves 16 are connected through a conveying pipe 21; two feeding ports 17 connected to the corresponding phase change grooves 16 are arranged in a mirror image on the side of each heat exchange plate 1 away from the trapezoidal groove 11; a transformation cavity 18 for placing phase change materials is also arranged inside each heat exchange plate 1, and the transformation cavity 18 is located below the corresponding trapezoidal groove 11 and is connected to two adjacent feeding ports 17.

[0040] Each heat exchange plate 1 is provided with a first through hole 19 for the bolt to pass through at four corners, and a second through hole 31 corresponding to the first through hole 19 is provided at four corners of the sealing bottom plate 3. The multiple heat exchange plates 1 are pressed and sealed with the sealing bottom plate 3 by bolts and nuts. At this time, the feed ports 17, the liquid outlets 13 and the liquid inlet 15 on the multiple heat exchange plates 1 are interconnected; the phase change material is preferably a phase change material that changes from solid to liquid. The staff first heats the phase change material, and then transports the liquid phase change material through the multiple interconnected feed ports 17 to the corresponding phase change tank 16 (as Figure 4 and Figure 5 As shown by the arrows), the liquid is passed through the plurality of delivery pipes 21 to the corresponding accommodating chamber 4 of the V-shaped accommodating plate 2 in sequence, thereby ensuring that each accommodating chamber 4, the transformation chamber 18 and the phase change groove 16 contain phase change materials, and the two liquid inlets 15 can respectively pass the cold fluid and the hot fluid (as the Figure 6 and Figure 7 as indicated by the arrow).

[0041] When the hot fluid circulates, the fluid enters the trapezoidal flow channel 5 through one of the liquid inlets 15. At this time, since the trapezoidal flow channels corresponding to the two liquid inlets 15 are staggered, the V-shaped containment plates 2 corresponding to the two ends of the hot fluid can slide between the two heat exchange plates 1, thereby expanding the trapezoidal flow channel 5 where the hot fluid is located. After the trapezoidal flow channel 5 is expanded, the flow rate of the hot fluid flowing through it per unit time increases, and the contact area between the fluid located in the trapezoidal flow channel 5 and the phase change material located in the transition chamber 18 increases, so that the phase change material can reach the phase change point faster, and while being able to store heat, it can also improve the space utilization rate inside the trapezoidal slot 11, and the fluid that has completed the heat exchange can be discharged through the liquid outlet 13;

[0042] When the cold fluid circulates, the fluid enters the trapezoidal flow channel 5 through another liquid inlet 15, and the V-shaped containment plates 2 corresponding to the two ends of the cold fluid can slide between the two heat exchange plates 1, thereby expanding the trapezoidal flow channel 5 where the cold fluid is located. After the trapezoidal flow channel 5 is expanded, the heat absorbed from the phase change material through heat transfer increases accordingly, thereby completing the temperature exchange faster.

[0043] See also Figure 5 and Fig.10 As shown, a plurality of support rods 22 are provided on the outer walls of both sides of each V-shaped containing plate 2 along the length direction, and a universal ball 221 is provided at one end of each support rod 22 away from the V-shaped containing plate 2 .

[0044] By providing a plurality of support rods 22, it is possible to ensure that the V-shaped containment plate 2 remains in a vertical state between the rectangular notch and the adjacent heat exchange plate 1, and each support rod 22 is also provided with a universal ball 221, which can assist the movement of the V-shaped containment plate 2 and ensure the stability of the movement of the V-shaped containment plate 2.

[0045] See also Figure 5 and Fig.10 As shown, a first sealing strip 23 is provided at both ends of the top of each V-shaped receiving plate 2 along the length direction, and a strip-shaped mounting groove 24 is provided at the lower end of each V-shaped receiving plate 2, and an inverted Y-shaped second sealing strip 25 is provided in the strip-shaped mounting groove 24.

[0046] The two ends of the V-shaped containing plate 2 are slidably sealed with the two sides of the trapezoidal notch 11, thereby ensuring the sealing effect between the V-shaped containing plate 2 and the two sides of the trapezoidal notch 11. By providing a first sealing strip 23, the sealing effect between the V-shaped containing plate 2 and the heat exchange plate 1 can be ensured to prevent the melted phase change material from entering the trapezoidal flow channel 5. By providing a second sealing strip 25 in an inverted Y shape, when the two heat exchange plates 1 are squeezed against each other, the bottom of the second sealing strip 25 can be bifurcated, thereby ensuring the sealing between the two adjacent trapezoidal flow channels 5, preventing the cold fluid and the hot fluid from mixing, which would cause mutual contamination between the two fluids.

[0047] See also Figure 4 and Figure 5 As shown, the delivery pipe 21 has a certain degree of elasticity.

[0048] The staff transports hot fluid or cold fluid to the two liquid inlets 15 in turn (as Figure 4 As shown by the cross mark, due to the impact of the fluid on the V-shaped containing plate 2, the V-shaped containing plates 2 on both sides of the corresponding trapezoidal flow channel 5 can move along the length direction of the trapezoidal notch 11. During this process, the delivery pipe 21 located in the trapezoidal flow channel 5 is stretched, thereby generating a reverse pulling force, which can prevent the delivery pipe 21 from being broken due to the movement of the V-shaped containing plate 2; by cooperating with the impact force generated by the fluid, the V-shaped containing plate 2 can move repeatedly, thereby colliding with the fluid located in the trapezoidal flow channel 5, which can not only disturb the fluid located in the trapezoidal flow channel 5, but also shake the phase change material, thereby improving the thermal interaction effect of the fluid.

[0049] See also Figure 8 and Fig. 9 As shown, each connecting pipe 142 extends into the corresponding trapezoidal flow channel 5 .

[0050] Each connecting pipe 142 extends into the corresponding trapezoidal flow channel 5, thereby limiting the movement distance of the V-shaped containing plate 2, thereby preventing two adjacent V-shaped containing plates 2 from moving too far when the fluid is flowing, thereby preventing the delivery pipe 21 from breaking.

[0051] See also Figure 5 and Fig. 9 As shown, a plurality of reinforcing ribs 26 are arranged inside each V-shaped receiving plate 2 .

[0052] When the trapezoidal flow channel 5 is filled with fluid, a plurality of reinforcing ribs 26 are provided inside the V-shaped containing plate 2 to ensure the stability of the movement of the V-shaped containing plate 2 and prevent the V-shaped containing plate 2 from being deformed by the pressure generated by the flow of fluid.

[0053] See also Figure 7 and Figure 8 As shown, a sealing strip 110 is also provided on one side of each heat exchange plate 1 close to the trapezoidal notch 11 .

[0054] When multiple heat exchange plates 1 and the sealing bottom plate 3 are squeezed by bolts and nuts, the sealing strip 110 can seal the liquid inlet groove 14, the liquid outlet groove, the phase change groove 16 and the trapezoidal notch 11, thereby avoiding mixing between the cold fluid, the hot fluid and the phase change material, and improving the overall sealing effect.

[0055] The above embodiments only express one or several implementation modes of the present invention, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the present invention. It should be pointed out that, for a person of ordinary skill in the art, several modifications and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the present invention patent shall be subject to the attached claims.

Claims

1. A phase change energy storage heat exchanger, characterized in that: It comprises a heat exchange plate, a V-shaped receiving plate and a sealing bottom plate; there are multiple heat exchange plates, and the multiple heat exchange plates are stacked in sequence on the sealing bottom plate; a trapezoidal notch is arranged at the center of each heat exchange plate, and multiple V-shaped receiving plates are slidably arranged in each trapezoidal notch; a receiving cavity for receiving phase change material is formed between the V-shaped receiving plate, the trapezoidal notch and adjacent heat exchange plates; multiple trapezoidal flow channels for fluid to pass through are formed between the multiple V-shaped receiving plates and two adjacent heat exchange plates; Two drainage grooves are mirror-imaged on each heat exchange plate, and the two drainage grooves are located on both sides of the corresponding trapezoidal notch. The inner wall of each drainage groove close to the trapezoidal notch is provided with a plurality of flow holes connected to the corresponding trapezoidal flow channel; and two liquid outlets connected to the corresponding drainage grooves are mirror-imaged on the side of each heat exchange plate away from the trapezoidal notch. Each heat exchange plate is also provided with two liquid inlet grooves, which are located on the side of the corresponding liquid discharge groove away from the trapezoidal notch. A plurality of delivery holes are provided on the inner wall of the side of each liquid inlet groove close to the liquid inlet groove, and the delivery holes on both sides of the trapezoidal notch are arranged alternately in sequence; each delivery hole is connected to the corresponding flow hole through a connecting pipe; and two liquid inlets connected to the corresponding liquid inlet grooves are mirror-imaged on the side of each heat exchange plate away from the trapezoidal notch; Phase change grooves for accommodating phase change materials are arranged at both ends of each trapezoidal notch, and a plurality of V-shaped accommodating plates and two phase change grooves are connected through a conveying pipe; two feeding ports connected to the corresponding phase change grooves are arranged on a mirror image on one side of each heat exchange plate away from the trapezoidal notch; Each heat exchange plate is also provided with a transition cavity for placing phase change material. The transition cavity is located below the corresponding trapezoidal notch and is communicated with two adjacent feeding ports.

2. A phase change energy storage heat exchanger according to claim 1, characterized in that: A plurality of support rods are arranged on the outer walls of both sides of each V-shaped accommodating plate along the length direction, and a universal ball is arranged at one end of each support rod away from the V-shaped accommodating plate.

3. A phase change energy storage heat exchanger according to claim 2, characterized in that: A first sealing strip is arranged at both ends of the top of each V-shaped receiving plate along the length direction, and a strip-shaped mounting groove is arranged at the lower end of each V-shaped receiving plate, and an inverted Y-shaped second sealing strip is arranged in the strip-shaped mounting groove.

4. The phase change energy storage heat exchanger according to claim 1, characterized in that: The conveying pipe has a certain degree of elasticity.

5. The phase-change energy storage heat exchanger according to claim 4, characterized in that: Each connecting pipe extends into the corresponding trapezoidal flow channel.

6. The phase-change energy storage heat exchanger according to claim 1, characterized in that: A plurality of reinforcing ribs are arranged inside each V-shaped receiving plate.

7. The phase-change energy storage heat exchanger according to claim 1, characterized in that: A sealing strip is also provided on one side of each heat exchange plate close to the trapezoidal notch.

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