Phase change recovery waste heat storage device

Abstract

The phase change recovery waste heat storage device comprises a box body and a phase change heat storage device, an air inlet is formed in the top of the box body, and an air outlet is formed in the bottom of the box body; the phase change heat accumulator is arranged in the box body and comprises a heating medium inlet connecting pipe, a heating medium outlet connecting pipe, a plurality of liquid distribution pipes, a plurality of liquid collecting pipes and a plurality of phase change heat storage plates arranged side by side, a ventilation grid groove is formed between every two adjacent phase change heat storage plates, and an inlet and an outlet of each ventilation grid groove are formed in the vertical direction. The phase change heat storage plate comprises a leftward medium cavity plate, a rightward medium cavity plate, a leftward rectangular frame, a rightward rectangular frame and a hot runner plate, the leftward rectangular frame is connected with the leftward medium cavity plate and the hot runner plate in a sealed mode, and a left cavity is defined by the leftward rectangular frame, the leftward medium cavity plate and the hot runner plate; and the rightward rectangular frame is respectively connected with the rightward medium cavity plate and the hot runner plate in a sealing manner. The phase change waste heat recovery heat storage device can collect and store heat, so that heat is supplied to places needing to be heated, and the obvious energy-saving effect is achieved.

Description

Technical Field

[0001] The invention relates to the technical field of waste heat recovery, and in particular to a phase change waste heat recovery heat storage device. Background Art

[0002] Waste heat resources are very rich and widely exist in many fields. The energy-saving potential of waste heat utilization is huge. Taking steam compression refrigeration as an example, the compressor inhales low-temperature and low-pressure refrigerant vapor from the evaporator, and is adiabatically compressed by the compressor to become high-temperature and high-pressure superheated steam. The superheated steam enters the condenser for medium pressure cooling, and the refrigerant releases heat. The high-temperature and high-pressure superheated steam is cooled to liquid refrigerant. The liquid refrigerant is adiabatically throttled by the expansion valve (or capillary tube) to become a low-pressure liquid refrigerant. It evaporates in the evaporator and absorbs heat from the air-conditioning circulating water (air), thereby achieving the purpose of refrigeration. The evaporated refrigerant is sucked into the compressor, and the cycle works in this way. The heat generated by the steam compression refrigeration process is 1.5 times the cooling capacity. In recent years, waste heat recovery has gradually been valued by energy experts, and waste heat recovery and utilization should be vigorously promoted and applied. Summary of the invention

[0003] The technical problem solved by the present invention is to provide a phase change waste heat recovery heat storage device for recovering waste heat generated during the operation of a steam compression refrigeration device.

[0004] In order to solve the above technical problems, the technical solution adopted by the present invention is: a phase change waste heat recovery heat storage device, including a box body and a phase change heat storage device, the top of the box body is provided with an air inlet, and the bottom of the box body is provided with an air outlet; the phase change heat storage device is arranged in the box body, the phase change heat storage device includes a heat medium inlet pipe, a heat medium outlet pipe, a plurality of liquid distribution pipes, a plurality of liquid collecting pipes and a plurality of phase change heat storage plates arranged side by side, a ventilation grid groove is formed between two adjacent phase change heat storage plates, the inlet and outlet of the ventilation grid groove are arranged in the up and down direction, the phase change heat storage plate includes a left medium cavity plate, a right medium cavity plate, a left rectangular frame, a right rectangular frame and a hot runner plate The left rectangular frame is sealed and connected with the left medium cavity plate and the hot runner plate respectively, and the left rectangular frame, the left medium cavity plate and the hot runner plate are enclosed to form a left chamber. The right rectangular frame is sealed and connected with the right medium cavity plate and the hot runner plate respectively, and the right rectangular frame, the right medium cavity plate and the hot runner plate are enclosed to form a right chamber. The left chamber and the right chamber are filled with heat storage medium respectively; a heat medium flow channel is provided in the hot runner plate, one end of the heat medium flow channel is connected to the liquid distributor, the liquid distributor is connected to the heat medium inlet pipe, the other end of the heat medium flow channel is connected to the liquid collector, and the liquid collector is connected to the heat medium outlet pipe.

[0005] In one embodiment, the hot runner plate includes a left-facing concave-convex cavity flow plate and a right-facing concave-convex cavity flow plate that are sealed and connected, and the left-facing concave-convex cavity flow plate and the right-facing concave-convex cavity flow plate are respectively provided with recessed portions, and the recessed portions of the left-facing concave-convex cavity flow plate and the recessed portions on the right-facing concave-convex cavity flow plate are arranged opposite to each other to form the heat medium flow channel, the left-facing rectangular frame is sealed and connected to the left-facing concave-convex cavity flow plate, and the right-facing rectangular frame is sealed and connected to the right-facing concave-convex cavity flow plate.

[0006] In one embodiment, a left-directed concave cavity is provided on the left-directed medium cavity plate, and the left-directed concave cavity is in surface contact with the recessed portion on the left-directed concave-convex cavity flow channel plate; and / or a right-directed concave cavity is provided on the right-directed medium cavity plate, and the right-directed concave cavity is in surface contact with the recessed portion on the right-directed concave-convex cavity flow channel plate.

[0007] In one embodiment, the left-facing rectangular frame is sealed and connected to the left-facing medium cavity plate by a sealant, the left-facing rectangular frame is sealed and connected to the hot runner plate by a sealant, the right-facing rectangular frame is sealed and connected to the right-facing medium cavity plate by a sealant, and the right-facing rectangular frame is sealed and connected to the hot runner plate by a sealant.

[0008] In one embodiment, the phase change heat storage device further includes a plurality of locking bolts and a plurality of annular gaskets, wherein the locking bolts penetrate each of the phase change heat storage plates, an annular gasket is provided between two adjacent phase change heat storage plates, the annular gasket is sleeved on the locking bolts, and the annular gasket is used to maintain the spacing between the two adjacent phase change heat storage plates so that the ventilation grille is formed between the two adjacent phase change heat storage plates.

[0009] In one embodiment, the phase change heat storage device further includes a left sealing plate, a right sealing plate, a left side seal and a right side seal, the left sealing plate is located on the left side of the phase change heat storage plate at the far left, the left side seal is located on the left side of the left sealing plate, the left sealing plate respectively abuts against the left side seal and the phase change heat storage plate at the far left, the right sealing plate is located on the right side of the phase change heat storage plate at the far right, the right side seal is located on the right side of the right sealing plate, the right sealing plate respectively abuts against the right side seal and the phase change heat storage plate at the far right, and the locking bolt passes through the left sealing plate, the right sealing plate, the left side seal and the right side seal.

[0010] In one embodiment, the liquid distribution pipe is inserted at the inlet of the heat medium flow channel, and the liquid collection pipe is inserted at the outlet of the heat medium flow channel.

[0011] In one embodiment, the box body is a sandwich structure, and the sandwich space of the sandwich structure is filled with a thermal insulation component.

[0012] In one embodiment, the box body includes a rectangular insulation box, a frustum insulation top and a frustum insulation bottom, the top of the rectangular insulation box is connected to the frustum insulation top, the bottom of the rectangular insulation box is connected to the frustum insulation bottom, the air inlet is arranged at the top of the frustum insulation top, the air outlet is arranged at the bottom of the frustum insulation bottom, and the phase change heat accumulator is arranged in the rectangular insulation box.

[0013] In one embodiment, a plurality of ear seats are provided on the rectangular thermal insulation box.

[0014] The beneficial effects of the present invention are:

[0015] As the heat generated by the operation of the refrigeration unit is far greater than the cooling capacity, this phase change waste heat recovery heat storage device can collect and store the heat generated by the operation of the refrigeration unit, thereby supplying heat to the places that need heating. This is waste heat utilization and has a significant energy-saving effect.

[0016] Heat pump air conditioners or heat pump heating equipment operate during off-peak hours to utilize valley electricity to store heat, and shut down to provide heating during peak hours, thereby playing a role in shaving peak loads and filling valleys to avoid the peak load of the power grid during peak hours, thereby achieving a positive effect in optimizing the efficiency of power grid resources. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0018] Figure 1 Schematic diagram of the internal structure of the phase change waste heat recovery heat storage device according to the first embodiment of the present invention Figure 1 ;

[0019] Figure 2 Schematic diagram of the internal structure of the phase change waste heat recovery heat storage device according to the first embodiment of the present invention Figure 2 ;

[0020] Figure 3 for Figure 2 The enlarged view of point A in the middle;

[0021] Figure 4 for Figure 2 The enlarged view of point B in the middle;

[0022] Figure 5 It is a cross-sectional view of a phase change heat storage plate in a phase change waste heat recovery heat storage device according to Embodiment 1 of the present invention;

[0023] Figure 6 for Figure 5 Enlarged view of point C in the middle.

[0024] Description of Figure Numbers:

[0025] 1. Box body; 11. Air inlet; 12. Air outlet; 13. Insulation component; 14. Rectangular insulation box; 15. Cone insulation top; 16. Cone insulation bottom; 17. Ear seat;

[0026] 2. Phase change heat storage device; 21. Heat medium inlet pipe; 22. Heat medium outlet pipe; 23. Liquid distributor; 24. Liquid collector; 25. Phase change heat storage plate; 251. Left medium cavity plate; 2511. Left concave cavity; 252. Right medium cavity plate; 2521. Right concave cavity; 253. Left rectangular frame; 254. Right rectangular frame; 255. Hot runner plate; 2551. Heat medium flow channel; 2552. Left concave-convex cavity flow channel plate; 2553. Right concave-convex cavity flow channel plate; 2554. Concave portion; 256. Left chamber; 257. Right chamber; 258. Heat storage medium; 26. Ventilation grille; 27. Locking bolt; 28. Ring gasket; 291. Left sealing plate; 292. Left trim seal; 293. Right sealing plate; 294. Right trim seal. DETAILED DESCRIPTION

[0027] The purpose, features and advantages of the present invention will be further described with reference to the accompanying drawings in conjunction with the embodiments.

[0028] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0029] It should be noted that if the embodiments of the present invention involve directional indications such as up, down, left, right, front, back, etc., then the directional indications are only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture as shown in the accompanying drawings. If the specific posture changes, the directional indication will also change accordingly.

[0030] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" or "second" may explicitly or implicitly include at least one of the features.

[0031] In addition, if the meaning of "and / or" appears in the full text is to include three parallel solutions, taking "and / or" as an example, it includes solutions, or solutions, or and solutions that are satisfied at the same time. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the protection scope required by the present invention.

[0032] In this application, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0033] Embodiment 1

[0034] Please refer to Figures 1 to 6 , Embodiment 1 of the present invention is: a phase change waste heat recovery heat storage device, comprising a box body 1 and a phase change heat storage device 2, wherein the top of the box body 1 is provided with an air inlet 11, and the bottom of the box body 1 is provided with an air outlet 12; the phase change heat storage device 2 is arranged in the box body 1, and the phase change heat storage device 2 comprises a heat medium inlet pipe 21, a heat medium outlet pipe 22, a plurality of liquid distribution pipes 23, a plurality of liquid collecting pipes 24 and a plurality of phase change heat storage plates 25 arranged side by side, and a ventilation grille 26 is formed between two adjacent phase change heat storage plates 25, and the inlet and outlet of the ventilation grille 26 are arranged in the up and down direction, and the phase change heat storage plate 25 comprises a left medium cavity plate 251, a right medium cavity plate 252, a left rectangular frame 253, a right rectangular frame 254 and a hot runner plate 255, and the left rectangular frame 253 is respectively sealed with the left medium cavity plate 251 and the hot runner plate 255 The left rectangular frame 253, the left medium cavity plate 251 and the hot runner plate 255 are sealed and connected together to form a left chamber 256. The right rectangular frame 254 is sealed and connected with the right medium cavity plate 252 and the hot runner plate 255 respectively. The right rectangular frame 254, the right medium cavity plate 252 and the hot runner plate 255 are sealed and connected together to form a right chamber 257. The left chamber 256 and the right chamber 257 are respectively filled with heat storage medium 258, and the heat storage medium 258 can be selected from phase change materials such as paraffin. A heat medium flow channel 2551 is provided in the hot runner plate 255, one end of the heat medium flow channel 2551 is connected to the liquid distribution pipe 23, the liquid distribution pipe 23 is connected to the heat medium inlet pipe 21, and the other end of the heat medium flow channel 2551 is connected to the liquid collecting pipe 24, and the liquid collecting pipe 24 is connected to the heat medium outlet pipe 22.

[0035] Specifically, the hot runner plate 255 includes a left-facing concave-convex cavity flow plate 2552 and a right-facing concave-convex cavity flow plate 2553 that are sealed and connected. The left-facing concave-convex cavity flow plate 2552 and the right-facing concave-convex cavity flow plate 2553 are respectively provided with recessed portions 2554. The recessed portions 2554 of the left-facing concave-convex cavity flow plate 2552 and the recessed portions 2554 on the right-facing concave-convex cavity flow plate 2553 are arranged opposite to each other to form the heat medium flow channel 2551. The left-facing rectangular frame 253 is sealed and connected to the left-facing concave-convex cavity flow plate 2552, and the right-facing rectangular frame 254 is sealed and connected to the right-facing concave-convex cavity flow plate 2553. More specifically, the left-hand concave-convex cavity flow plate 2552 and the right-hand concave-convex cavity flow plate 2553 are in surface contact with each other except for the recessed portion 2554 used to form the heat medium flow channel 2551. Preferably, the left-hand concave-convex cavity flow plate 2552 and the right-hand concave-convex cavity flow plate 2553 are hot-melt-welded by a hot-melt process, and the welded joint meets the sealing requirements.

[0036] In order to improve the heat exchange efficiency, the heat medium flowing in the heat medium flow channel 2551 does not need to be stored in the heat storage medium 258, and directly transfers the heat to the air flowing through the ventilation grid groove 26. In this embodiment, the left medium cavity plate 251 is provided with a left concave cavity 2511, and the left concave cavity 2511 is in contact with the concave portion 2554 on the left concave-convex cavity flow channel plate 2552; the right medium cavity plate 252 is provided with a right concave cavity 2521, and the right concave cavity 2521 is in contact with the recessed portion 2554 on the right concave-convex cavity flow channel plate 2553. At this time, the heat of the heat medium in the heat medium flow channel 2551 is directly transferred to the air flowing through the ventilation grid groove 26 through the wall of the recessed portion 2554 and the wall of the left concave cavity 2511 / the wall of the right concave cavity 2521, so that the area of ​​the phase change heat storage plate 25 corresponding to the heat medium flow channel 2551 can directly conduct heat to the outside without the need for heat storage medium 258 to store heat, thereby achieving the purpose of improving the heat exchange effect. Moreover, since there is a direct contact area between the left medium cavity plate 251 and the left concave-convex cavity flow channel plate 2552, and the area corresponds to the heat medium flow channel 2551, the left medium cavity plate 251 can also be better heated up, thereby transferring heat to the ventilation grating groove 26 and the heat storage medium 258, which is beneficial to improve the heat exchange efficiency. Similarly, since there is a direct contact area between the right medium cavity plate 252 and the right concave-convex cavity flow channel plate 2553, and the area corresponds to the heat medium flow channel 2551, the right medium cavity plate 252 can also be better heated up, thereby transferring heat to the ventilation grating groove 26 and the heat storage medium 258. In other embodiments, it is also acceptable that only the left medium cavity plate 251 is provided with the left concave cavity 2511, or only the right medium cavity plate 252 is provided with the right concave cavity 2521.

[0037] The left rectangular frame 253 is sealed and connected to the left medium cavity plate 251 by sealant, the left rectangular frame 253 is sealed and connected to the hot runner plate 255 by sealant, the right rectangular frame 254 is sealed and connected to the right medium cavity plate 252 by sealant, and the right rectangular frame 254 is sealed and connected to the hot runner plate 255 by sealant. The sealant can be epoxy resin, nitrile rubber, aramid film composite structural adhesive film, etc. Epoxy resin, nitrile rubber, aramid film composite structural adhesive film has the advantages of high strength, good toughness, rapid curing at high temperature, uniform glue distribution, simple construction process, etc., and allows long-term use temperature ≥120°C and high reliability.

[0038] The phase change heat storage device 2 also includes a plurality of locking bolts 27 and a plurality of annular gaskets 28. The locking bolts 27 penetrate each of the phase change heat storage plates 25. An annular gasket 28 is provided between two adjacent phase change heat storage plates 25. The annular gasket 28 is sleeved on the locking bolts 27. The annular gasket 28 is used to maintain the spacing between the two adjacent phase change heat storage plates 25 so that the ventilation grille 26 is formed between the two adjacent phase change heat storage plates 25. The annular gasket 28 can be made of hard metal material or heat-resistant silicone. In this embodiment, the plurality of locking bolts 27 are distributed in a circle along the edge of the phase change heat storage plate 25.

[0039] In this embodiment, the phase change heat storage device 2 also includes a left sealing plate 291, a right sealing plate 293, a left edge seal 292 and a right edge seal 294. The left sealing plate 291 is located on the left side of the phase change heat storage plate 25 on the far left, and the left edge seal 292 is located on the left side of the left sealing plate 291. The left sealing plate 291 respectively abuts against the left edge seal 292 and the phase change heat storage plate 25 on the far left. The right sealing plate 293 is located on the right side of the phase change heat storage plate 25 on the far right, and the right edge seal 294 is located on the right side of the right sealing plate 293. The right sealing plate 293 respectively abuts against the right edge seal 294 and the phase change heat storage plate 25 on the far right. The locking bolt 27 passes through the left sealing plate 291, the right sealing plate 293, the left edge seal 292 and the right edge seal 294.

[0040] The liquid distribution pipe 23 is inserted at the entrance of the heat medium flow channel 2551, and the liquid collection pipe 24 is inserted at the exit of the heat medium flow channel 2551. Preferably, the liquid distribution pipe 23 and the hot runner plate 255 are welded by a hot melt welding process, and the welding point meets the sealing requirements. The liquid collection pipe 24 and the hot runner plate 255 are welded by a hot melt welding process, and the welding point meets the sealing requirements.

[0041] The box body 1 is a sandwich structure, and the sandwich space of the sandwich structure is filled with a thermal insulation member 13. The thermal insulation member 13 is made of aluminum silicate fiber felt, silicon dioxide aerogel felt or other materials.

[0042] The box body 1 includes a rectangular insulation box 14, a frustum insulation top 15 and a frustum insulation bottom 16. The top of the rectangular insulation box 14 is connected to the frustum insulation top 15, and the bottom of the rectangular insulation box 14 is connected to the frustum insulation bottom 16. The air inlet 11 is arranged at the top of the frustum insulation top 15, and the air outlet 12 is arranged at the bottom of the frustum insulation bottom 16. The phase change heat accumulator 2 is arranged in the rectangular insulation box 14.

[0043] In order to facilitate the installation and support of the rectangular insulation box 14 , a plurality of ear seats 17 are provided on the rectangular insulation box 14 .

[0044] The working principle of this phase change waste heat recovery heat storage device is briefly described as follows:

[0045] When the heat medium is input from the heat medium inlet pipe 21, it flows into the heat medium flow channel 2551 of the hot runner plate 255 through the liquid distribution pipe 23, and after circulating through the heat medium flow channel 2551, it flows into the heat medium outlet pipe 22 through the liquid collecting pipe 24; during the heat medium flowing through the hot runner plate 255, the heat of the heat medium is transferred to the left concave-convex cavity flow channel plate 2552, the left medium cavity plate 251, the right concave-convex cavity flow channel plate 2553 and the right medium cavity plate 252, so that the heat storage in the left chamber 256 is Medium 258 and the heat storage medium 258 in the right chamber 257 absorb heat, and a small part of the heat is directly transferred to the ventilation grid groove 26. As the circulation time of the heat medium in the heat medium flow channel 2551 of the hot runner plate 255 continues to increase, the heat absorption of the heat storage medium 258 continues to increase, and the temperature of the heat storage medium 258 continues to rise, and finally a phase change is formed, from solid phase to liquid phase, and the heat storage medium 258 stores heat in the form of phase change latent heat and sensible heat of temperature rise of the heat storage medium 258.

[0046] When the air flow enters the rectangular insulation box 14 through the air inlet 11 and flows through the ventilation grille 26, the air flow forms convection heat exchange with the left medium cavity plate 251 and the right medium cavity plate 252. The heat stored in the heat storage medium 258 of the left chamber 256 is transferred to the ventilation grille 26 through the left medium cavity plate 251, and the heat stored in the heat storage medium 258 of the right chamber 257 is transferred to the ventilation grille 26 through the right medium cavity plate 252, so that the temperature of the air flow flowing through the ventilation grille 26 increases, and the air flow with increased temperature is output to the workstation that needs heating through the air outlet 12, and the heat stored in the heat storage medium 258 is utilized.

[0047] The above are only optional embodiments of the present invention, and do not limit the patent scope of the present invention. All equivalent structural changes made by using the contents of the present invention specification and drawings under the inventive concept of the present invention, or directly / indirectly applied in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A phase change waste heat recovery heat storage device, characterized in that: The invention comprises a box body and a phase change heat storage device, wherein the top of the box body is provided with an air inlet, and the bottom of the box body is provided with an air outlet; the phase change heat storage device is arranged in the box body, and the phase change heat storage device comprises a heat medium inlet pipe, a heat medium outlet pipe, a plurality of liquid distribution pipes, a plurality of liquid collecting pipes and a plurality of phase change heat storage plates arranged side by side, and a ventilation grid groove is formed between two adjacent phase change heat storage plates, and the inlet and outlet of the ventilation grid groove are arranged in the up-down direction, and the phase change heat storage plate comprises a left medium cavity plate, a right medium cavity plate, a left rectangular frame, a right rectangular frame and a hot runner plate, and the left rectangular frame is respectively connected to the left medium cavity plate, and the left rectangular frame is respectively connected to the left medium cavity plate, and the right rectangular frame is ... The cavity plate and the hot runner plate are sealed and connected, the left rectangular frame, the left medium cavity plate and the hot runner plate are enclosed to form a left chamber, the right rectangular frame is sealed and connected to the right medium cavity plate and the hot runner plate respectively, the right rectangular frame, the right medium cavity plate and the hot runner plate are enclosed to form a right chamber, the left chamber and the right chamber are respectively filled with heat storage medium; a heat medium flow channel is provided in the hot runner plate, one end of the heat medium flow channel is connected to the liquid distributor, the liquid distributor is connected to the heat medium inlet pipe, the other end of the heat medium flow channel is connected to the liquid collector, and the liquid collector is connected to the heat medium outlet pipe.

2. The phase change waste heat recovery heat storage device according to claim 1 is characterized in that: The hot runner plate comprises a left-facing concave-convex cavity flow plate and a right-facing concave-convex cavity flow plate which are sealed and connected, and recessed portions are respectively provided on the left-facing concave-convex cavity flow plate and the right-facing concave-convex cavity flow plate. The recessed portions of the left-facing concave-convex cavity flow plate and the recessed portions on the right-facing concave-convex cavity flow plate are arranged opposite to each other to form the heat medium flow channel, and the left-facing rectangular frame is sealed and connected to the left-facing concave-convex cavity flow plate, and the right-facing rectangular frame is sealed and connected to the right-facing concave-convex cavity flow plate.

3. The phase change waste heat recovery heat storage device according to claim 2 is characterized in that: The left-facing medium cavity plate is provided with a left-facing concave cavity, which is in surface contact with the recessed portion on the left-facing concave-convex cavity flow channel plate; and / or, the right-facing medium cavity plate is provided with a right-facing concave cavity, which is in surface contact with the recessed portion on the right-facing concave-convex cavity flow channel plate.

4. The phase change waste heat recovery heat storage device according to claim 1 is characterized in that: The left-facing rectangular frame is sealed and connected to the left-facing medium cavity plate by sealant, the left-facing rectangular frame is sealed and connected to the hot runner plate by sealant, the right-facing rectangular frame is sealed and connected to the right-facing medium cavity plate by sealant, and the right-facing rectangular frame is sealed and connected to the hot runner plate by sealant.

5. The phase change waste heat recovery heat storage device according to claim 1 is characterized in that: The phase change heat storage device also includes a plurality of locking bolts and a plurality of annular gaskets, wherein the locking bolts penetrate through each of the phase change heat storage plates, an annular gasket is arranged between two adjacent phase change heat storage plates, and the annular gasket is sleeved on the locking bolts, and the annular gasket is used to maintain the spacing between the two adjacent phase change heat storage plates so that the ventilation grille is formed between the two adjacent phase change heat storage plates.

6. The phase change waste heat recovery heat storage device according to claim 5 is characterized in that: The phase change heat storage device also includes a left sealing plate, a right sealing plate, a left side seal and a right side seal, the left sealing plate is located on the left side of the phase change heat storage plate at the leftmost side, the left side seal is located on the left side of the left sealing plate, the left sealing plate respectively abuts against the left side seal and the phase change heat storage plate at the leftmost side, the right sealing plate is located on the right side of the phase change heat storage plate at the rightmost side, the right side seal is located on the right side of the right sealing plate, the right sealing plate respectively abuts against the right side seal and the phase change heat storage plate at the rightmost side, and the locking bolt passes through the left sealing plate, the right sealing plate, the left side seal and the right side seal.

7. The phase change waste heat recovery heat storage device according to claim 1 is characterized in that: The liquid distribution pipe is inserted at the inlet of the heat medium flow channel, and the liquid collection pipe is inserted at the outlet of the heat medium flow channel.

8. The phase change waste heat recovery heat storage device according to claim 1 is characterized in that: The box body is a sandwich structure, and the sandwich space of the sandwich structure is filled with a heat-insulating component.

9. The phase change waste heat recovery heat storage device according to claim 1 is characterized in that: The box body includes a rectangular insulation box, a frustum insulation top and a frustum insulation bottom. The top of the rectangular insulation box is connected to the frustum insulation top, the bottom of the rectangular insulation box is connected to the frustum insulation bottom, the air inlet is arranged at the top of the frustum insulation top, the air outlet is arranged at the bottom of the frustum insulation bottom, and the phase change heat accumulator is arranged in the rectangular insulation box.

10. The phase change waste heat recovery heat storage device according to claim 9, characterized in that: The rectangular heat preservation box is provided with a plurality of ear seats.

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