A supercritical carbon dioxide heat pump with a regenerator

Abstract

The present invention relates to the technical field of heat pumps, and in particular to a supercritical carbon dioxide heat pump with a regenerator. The supercritical carbon dioxide heat pump with a regenerator comprises a compressor, a condenser, a throttling device, an evaporator and a regenerator. The regenerator comprises a shell, in which a plurality of stacked heat medium plates are inserted, the heat medium plates can elastically slide in a direction perpendicular to their own plate surfaces, adjacent heat medium plates are connected with telescopic rings, the telescopic rings can telescope in the direction of their own axes, adjacent heat medium plates and telescopic rings are jointly surrounded to form a first sealed chamber, two adjacent heat medium plates form a group, and heat medium plates of different groups located on the same side are connected and provided with elastic telescopic parts on the plate surface close to another heat medium plate, the elastic telescopic parts are configured to be able to stretch in a direction perpendicular to the plate surface of the heat medium plate when the heat medium flows in, so as to stretch the telescopic ring, thereby ensuring that the refrigerant flow space can be increased, thereby increasing the refrigerant flow rate and ensuring the heating efficiency.

Description

Technical Field

[0001] The invention relates to the technical field of heat pumps, in particular to a supercritical carbon dioxide heat pump with a regenerator. Background Art

[0002] A supercritical carbon dioxide heat pump is a device that uses the unique thermodynamic properties of carbon dioxide in a supercritical state to achieve efficient energy conversion. It has significant advantages, including high efficiency, low environmental impact and a wide range of applications, and has therefore been widely studied and applied in many fields.

[0003] In the actual operation of supercritical carbon dioxide heat pumps, in order to further improve their heating efficiency, a common and effective technical means is to set up a regenerator, which can make full use of the energy inside the system to realize heat recovery and reuse, thereby significantly improving the overall performance of the system; common regenerators include coil type, shell and tube type and plate type, among which the plate type regenerator has the outstanding advantage of high heat transfer efficiency. Its special plate structure can greatly increase the heat exchange area between the heat medium and the refrigerant, so that heat can be transferred between the two quickly and efficiently, and is widely used.

[0004] However, the existing plate-type regenerators also have some problems during use: due to the large pressure difference between the heat medium and the refrigerant, the heat medium will squeeze the space occupied by the refrigerant under the action of the pressure difference. As the refrigerant space continues to shrink, the flow channel of the refrigerant in the regenerator will become narrow, which directly leads to the refrigerant flow being seriously affected and unable to flow smoothly in the regenerator according to the normal design flow. The reduction in the refrigerant flow will further cause the heat exchange efficiency between the heat medium and the refrigerant to decrease, thereby reducing the heat recovery effect of the regenerator and affecting the heating efficiency of the supercritical carbon dioxide heat pump. Summary of the invention

[0005] Based on this, it is necessary to provide a supercritical carbon dioxide heat pump with a heat regenerator to address the problem of low heating efficiency of the current supercritical carbon dioxide heat pump during use.

[0006] The above purpose is achieved through the following technical solutions:

[0007] A supercritical carbon dioxide heat pump with a regenerator, the supercritical carbon dioxide heat pump with a regenerator comprises a compressor, a condenser, a throttling device, an evaporator and a regenerator, the regenerator comprises a shell, a refrigerant inlet, a refrigerant outlet, a heat medium inlet and a heat medium outlet are arranged on the shell, the refrigerant inlet is connected to the outlet of the evaporator, the refrigerant outlet is connected to the air suction port of the compressor, the exhaust port of the compressor is connected to the inlet of the condenser, the outlet of the condenser is connected to the heat medium inlet, the heat medium outlet is connected to the inlet of the throttling device, and the outlet of the throttling device is connected to the inlet of the evaporator; a plurality of stacked heat medium plates are inserted in the shell, and the heat medium plates can be arranged along a direction perpendicular to the plate itself The heat medium plates are shell-shaped structures, all of which are interconnected and connected to the heat medium inlet and the heat medium outlet; adjacent heat medium plates are connected with telescopic rings, which can be telescopic along their own axis, and adjacent heat medium plates and telescopic rings are jointly surrounded to form a first sealed chamber, which is connected to the refrigerant inlet and the refrigerant outlet; two adjacent heat medium plates form a group, and heat medium plates of different groups located on the same side are connected to each other on the plate surface close to another heat medium plate of the same group, and the elastic telescopic parts are configured to be able to stretch in a direction perpendicular to the plate surface of the heat medium plate when the heat medium flows in, so as to stretch the telescopic ring.

[0008] Furthermore, a card slot is provided on the plate surface of each heat medium plate of the same group located on the other side close to another heat medium plate, and the card slot and the elastic telescopic member form a card-fitting fit.

[0009] Furthermore, the elastic telescopic part is a shell-like structure, and has a head, a supporting part, two body parts, two arms and two ears. The body part is a telescopic structure, and the two body parts are arranged on the heat medium plate at intervals; the two arms are arranged on the two body parts respectively, and both are arranged to be inclined outward; the two ears are arranged on the two arms respectively; the head is arranged on the two ears at the same time, and is located between the two ears; the supporting part is arranged between the two arms, and is configured to serve as a fulcrum to support the deformation of the arms and the ears; the head and the two ears can be engaged with the card slot after shrinkage and deformation; a sealing fixing is arranged between the body and the heat medium plate, and the sealing fixing and the arm form a guiding fit and can guide the opening of the two arms.

[0010] Furthermore, the elastic telescopic member also has two sealing parts, which are arranged on the head and located between the two ears. When the elastic telescopic member and the card slot form a snap fit, a second sealed chamber is formed between the two sealing parts.

[0011] Furthermore, sealant is filled between the card slot and the sealing portion.

[0012] Furthermore, the sealing portion is a J-shaped structure, and the bending sections of the two sealing portions are arranged opposite to each other.

[0013] Furthermore, the elastic telescopic member is a strip structure.

[0014] Furthermore, the elastic stretchable member extends along the fold line.

[0015] Furthermore, there are multiple elastic expansion members arranged on each heat medium plate, and the multiple elastic expansion members on the same heat medium plate extend in the same direction.

[0016] Furthermore, an elastic expansion member located in the middle of the same heat medium plate divides the first sealed chamber into two flow areas that are interconnected, and allows the refrigerant to form a U-shaped flow path.

[0017] The beneficial effects of the present invention are:

[0018] In the use process of a supercritical carbon dioxide heat pump with a heat regenerator provided by the present invention, when the heat medium flows into the elastic telescopic part, the adjacent heat medium plates can be adaptively moved under the pushing of the elastic telescopic part, and the volume of the first sealed chamber is increased while the telescopic ring is stretched, thereby increasing the flow space of the refrigerant, reducing the resistance to the flow of the refrigerant, and increasing the flow rate of the refrigerant, thereby improving the heat exchange efficiency between the refrigerant and the heat medium, and ensuring the efficient heating of the supercritical carbon dioxide heat pump.

[0019] Furthermore, by providing a card slot, when in use, the elastic telescopic member and the card slot form a card-fitting fit. On the one hand, when the heat medium flows into the elastic telescopic member, the elastic telescopic member can timely push the adjacent heat medium plate, while stretching the telescopic ring, increasing the volume of the first sealed chamber, thereby ensuring the timeliness of adjusting the refrigerant space. On the other hand, a connection can be established between the elastic telescopic member and the adjacent heat medium plate, thereby improving the connection stability between the adjacent heat medium plates.

[0020] Furthermore, by filling sealant between the card slot and the sealing portion, the refrigerant cannot enter the card slot during use, thereby avoiding reducing the pushing effect of the elastic expansion member on the adjacent heat medium plate.

[0021] Furthermore, by setting the sealing part to a J-shaped structure, when in use, the air in the card slot can more easily flow out from the gap between the card slot and the sealing part, and it is more difficult for the air in the first sealed chamber to flow into the card slot from the gap between the card slot and the sealing part, which is beneficial to improving the sealing of the second sealed chamber.

[0022] Furthermore, by arranging the elastic expansion member to be a strip structure, the elastic expansion member can support the heat medium plate, which is beneficial to enhancing the structural strength of the heat medium plate.

[0023] Furthermore, by providing an elastic expansion member in the middle of the same heat medium plate, the first sealed chamber is divided into two interconnected flow areas, and the refrigerant forms a U-shaped flow path, thereby increasing the flow distance of the refrigerant and making the refrigerant heat exchange more sufficient. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 A working principle diagram of a supercritical carbon dioxide heat pump with a regenerator provided in an embodiment of the present invention;

[0025] Figure 2 A perspective structural diagram of a regenerator of a supercritical carbon dioxide heat pump with a regenerator provided in an embodiment of the present invention;

[0026] Figure 3 A schematic cross-sectional structural diagram of a regenerator of a supercritical carbon dioxide heat pump with a regenerator provided in an embodiment of the present invention;

[0027] Figure 4 A schematic side structural view of a supercritical carbon dioxide heat pump with a regenerator provided in an embodiment of the present invention, with the shell, guide rod and compression spring removed;

[0028] Figure 5 Schematic diagram of the three-dimensional structure of the heat medium plate and elastic expansion member of the supercritical carbon dioxide heat pump with a regenerator provided in an embodiment of the present invention when assembled Figure 1 ;

[0029] Figure 6 Schematic diagram of the three-dimensional structure of the heat medium plate and elastic expansion member of the supercritical carbon dioxide heat pump with a regenerator provided in an embodiment of the present invention when assembled Figure 2 ;

[0030] Figure 7 Working principle of the elastic expansion member of the regenerator of the supercritical carbon dioxide heat pump with regenerator provided in the embodiment of the present invention Figure 1 ;

[0031] Figure 8 Working principle of the elastic expansion member of the regenerator of the supercritical carbon dioxide heat pump with regenerator provided in the embodiment of the present invention Figure 2 ;

[0032] Fig. 9 Working principle of the elastic expansion member of the regenerator of the supercritical carbon dioxide heat pump with regenerator provided in the embodiment of the present invention Figure 3 ;

[0033] Fig.10 Working principle of the elastic expansion member of the regenerator of the supercritical carbon dioxide heat pump with regenerator provided in the embodiment of the present invention Figure 4 .

[0034] in:

[0035] 1. Compressor; 2. Condenser; 3. Throttling device; 4. Evaporator; 5. Regenerator; 501. Shell; 5011. Refrigerant inlet; 5012. Refrigerant outlet; 5013. Heat medium inlet; 5014. Heat medium outlet; 5015. Guide rod; 5016. Compression spring; 502. Heat medium plate; 5021. Slot; 5022. Connecting hole; 503. Telescopic ring; 504. Elastic telescopic part; 5041. Head; 5042. Support part; 5043. Body; 5044. Arm; 5045. Ear; 505. Sealing fixture; 506. Sealing part; 507. Sealant; 508. Bellows; 509. Fixing pipe; 510. Support plate. DETAILED DESCRIPTION

[0036] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below through embodiments and in conjunction with the accompanying drawings. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0037] The serial numbers assigned to the components herein, such as "first", "second", etc., are only used to distinguish the objects described and do not have any order or technical meaning. The "connection" and "coupling" mentioned herein, unless otherwise specified, include direct and indirect connections (couplings). In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", etc., indicating the orientation or position relationship are based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the present invention.

[0038] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0039] like Figure 1As shown, a supercritical carbon dioxide heat pump with a regenerator provided in an embodiment of the present invention is configured to include a compressor 1, a condenser 2, a throttling device 3, an evaporator 4 and a regenerator 5; the regenerator 5 is configured to include a shell 501, and a refrigerant inlet 5011, a refrigerant outlet 5012, a heat medium inlet 5013 and a heat medium outlet 5014 are provided on the shell 501, wherein the refrigerant inlet 5011 is connected to the outlet of the evaporator 4, the refrigerant outlet 5012 is connected to the suction port of the compressor 1, the exhaust port of the compressor 1 is connected to the inlet of the condenser 2, the outlet of the condenser 2 is connected to the heat medium inlet 5013, the heat medium outlet 5014 is connected to the inlet of the throttling device 3, and the outlet of the throttling device 3 is connected to the inlet of the evaporator 4, to ensure that a complete heating cycle can be formed.

[0040] Optionally, the compressor 1 may be configured as any one of a scroll type, a piston type, a screw type, a centrifugal type, and the like.

[0041] Optionally, the condenser 2 and / or the evaporator 4 may be configured as any one of a shell and tube type, a coil type, a sleeve type, and the like.

[0042] Optionally, the throttling device 3 can be set to any one of a mechanical throttle valve, an electronic throttle valve, etc.

[0043] For the sake of distinction, the carbon dioxide before entering the throttling device 3 is defined as heat medium, and the carbon dioxide after being throttled by the throttling device 3 is defined as refrigerant.

[0044] like Figures 2 to 10 As shown, a plurality of stacked heat medium plates 502 are inserted in the shell 501, and the heat medium plates 502 can slide elastically in a direction perpendicular to their own plate surfaces. The heat medium plates 502 are shell-shaped structures, and all the heat medium plates 502 are connected to each other and are connected to the heat medium inlet 5013 and the heat medium outlet 5014; telescopic rings 503 are connected between adjacent heat medium plates 502, and the telescopic rings 503 can be telescoped along their own axis directions. A first sealed chamber is formed between adjacent heat medium plates 502 and telescopic rings 503, and the first sealed chamber is connected to the refrigerant inlet 5011 and the refrigerant outlet 5012; two adjacent heat medium plates 502 form a group, and the heat medium plates 502 of different groups located on the same side are connected to each other. The elastic telescopic parts 504 are arranged on the plate surfaces close to another heat medium plate 502 of the same group, and the elastic telescopic parts 504 are configured to be able to stretch in a direction perpendicular to the plate surface of the heat medium plate 502 when the heat medium flows in, so as to stretch the telescopic ring 503.

[0045] Specifically in this embodiment, Figure 2As shown, the plate surface of the heat medium plate 502 is vertically arranged and parallel to the left and right directions, and multiple heat medium plates 502 are stacked and arranged in the front-to-back direction; in order to facilitate the installation of the heat medium plate 502, at least two guide rods 5015 are inserted in the shell 501, and the guide rods 5015 extend in the front-to-back direction. The two ends of the guide rods 5015 are respectively vertically arranged on the front and rear inner walls of the shell 501, and the heat medium plates 502 are slidably sleeved on all the guide rods 5015 at the same time during installation; in order to facilitate the elastic sliding of the heat medium plate 502 in the direction perpendicular to its own plate surface, a compression spring is sleeved on each guide rod 5015 5016, the compression spring 5016 is arranged near the rear end of the guide rod 5015, the rear end of the compression spring 5016 is arranged on the rear inner wall of the shell 501, and the front end is arranged on the rear plate surface of the heat medium plate 502 on the rear side. Under the action of the compression spring 5016, all the heat medium plates 502 can be pressed tightly, on the one hand, the heat exchange contact area between adjacent heat medium plates 502 is maximized to ensure the heat exchange efficiency, and on the other hand, it can adapt to the thermal expansion and contraction of the heat medium plate 502 caused by temperature changes, avoid deformation or damage of the heat medium plate 502 due to thermal stress concentration, and extend the service life of the heat regenerator 5.

[0046] An elastic expansion member 504 is connected and arranged on the rear plate surface of each heat medium plate 502; the supercritical carbon dioxide heat pump with a heat regenerator is configured to also include a support plate 510, which is arranged in parallel on the rear side of the heat medium plate 502 on the rear side, and a expansion ring 503 is vertically connected between the support plate 510 and the heat medium plate 502 on the rear side, and they are jointly surrounded to form a first sealed chamber, and the two fixed pipes 509 on the heat medium plate 502 on the rear side are connected to the first sealed chamber, so as to ensure the integrity of the structure; the elastic expansion member 504 can be set as an inverted U-shaped structure, and the opening of the elastic expansion member 504 passes through the heat medium plate 502 to ensure that the heat medium can be introduced; the side wall of the elastic expansion member 504 is set as a corrugated structure to ensure that the elastic expansion member 504 can extend in a direction perpendicular to the plate surface of the heat medium plate 502.

[0047] Alternatively, if Figure 2 As shown, the heat medium inlet 5013 and the heat medium outlet 5014 are both arranged on the front side wall of the shell 501, and are arranged on the upper side, and are arranged at intervals in the left-right direction. The refrigerant inlet 5011 and the refrigerant outlet 5012 are both arranged on the front side wall of the shell 501, and are arranged on the lower side, and are arranged at intervals in the left-right direction.

[0048] More specifically, in order to facilitate the introduction of heat medium into the heat medium plate 502, two bellows 508 are vertically connected and communicated between adjacent heat medium plates 502, one of the bellows 508 is connected to the heat medium inlet 5013, and the other bellows 508 is connected to the heat medium outlet 5014, ensuring that the heat medium can flow in and out of the regenerator 5.

[0049] More specifically, in order to facilitate the introduction of the refrigerant into the first sealed chamber, two fixed tubes 509 are vertically and penetrated on each heat medium plate 502, and the two ends of the fixed tubes 509 are respectively connected to the two adjacent first sealed chambers, one of the fixed tubes 509 is connected to the refrigerant inlet 5011, and the other fixed tube 509 is connected to the refrigerant outlet 5012, ensuring that the refrigerant can flow in and out of the reheater 5.

[0050] During use, carbon dioxide is first compressed in compressor 1, and the pressure and temperature increase; then the high-temperature and high-pressure carbon dioxide enters the condenser 2; in condenser 2, carbon dioxide releases heat to the external environment; then it enters the regenerator 5 through the heat medium inlet 5013, and then enters the heat medium plate 502 through the bellows 508.

[0051] As carbon dioxide continuously enters, it releases heat to the refrigerant while gradually filling up the heat medium plate 502. At the same time, it enters the elastic telescopic member 504 and pushes the elastic telescopic member 504 to extend in a direction perpendicular to the plate surface of the heat medium plate 502. This extension action generates a thrust force, which pushes the adjacent heat medium plates 502, increases the distance between the adjacent heat medium plates 502, increases the volume of the first sealed chamber, reduces the resistance to the flow of the refrigerant, and increases the flow rate of the refrigerant. This enables the heat transfer between the heat medium and the refrigerant to be more complete, and allows the heat in the heat medium to be more efficiently transferred to the refrigerant, thereby improving the heat exchange efficiency between the refrigerant and the heat medium and ensuring efficient heating of the supercritical carbon dioxide heat pump.

[0052] As carbon dioxide continues to release heat, the temperature decreases, and carbon dioxide flows into the throttling device 3 from the heat medium outlet 5014 through another bellows 508; in the throttling device 3, the pressure of carbon dioxide drops sharply; then, the carbon dioxide enters the evaporator 4; in the evaporator 4, the carbon dioxide absorbs external heat; then, it enters the regenerator 5 through the refrigerant inlet 5011; in the regenerator 5, the carbon dioxide enters the first sealed chamber from the fixed pipe 509.

[0053] As carbon dioxide continues to enter, it absorbs the heat released by the heat medium and gradually fills up the first sealed chamber, then enters the compressor 1 from the refrigerant outlet 5012 through another fixed pipe 509 and is compressed again, and this cycle repeats to form a complete heating cycle.

[0054] In some embodiments, in order to ensure the timeliness of the elastic expansion member 504 in regulating the refrigerant flow space, the heat medium plate 502 located on the other side of the same group is provided with a card slot 5021 on the plate surface close to another heat medium plate 502, and the card slot 5021 and the elastic expansion member 504 form a snap fit. In this way, through the snap fit between the card slot 5021 and the elastic expansion member 504, when the heat medium flows in, the elastic expansion member 504 can push the adjacent heat medium plate 502 in time.

[0055] Specifically in this embodiment, except for the heat medium plate 502 on the front side, a card slot 5021 is provided on the front plate surface of each heat medium plate 502 to ensure that it can form a card-fitting fit with the elastic telescopic member 504 on the adjacent heat medium plate 502; a card slot 5021 is provided on the front plate surface of the support plate 510, and the card slot 5021 forms a card-fitting fit with the elastic telescopic member 504 on the rearmost heat medium plate 502, thereby ensuring the integrity of the structure.

[0056] In a further embodiment, the elastic telescopic member 504 is configured as a shell-like structure, and has a head 5041, a support portion 5042, two body portions 5043, two arm portions 5044 and two ears 5045. The body portion 5043 is a telescopic structure, and the two body portions 5043 are spaced apart on the heat medium plate 502; the two arms 5044 are respectively arranged on the two body portions 5043, and are both arranged to be inclined outward; the two ears 5045 are respectively arranged on the two arms 5044; the head 5041 is simultaneously arranged on the two The ear 5045 is disposed between the two ears 5045; the support portion 5042 is disposed between the two arms 5044, and is configured to serve as a fulcrum to support the deformation of the arms 5044 and the ears 5045; the head 5041 and the two ears 5045 can be engaged with the card slot 5021 after shrinkage and deformation; a sealing fixing member 505 is disposed between the body 5043 and the heat medium plate 502, and the sealing fixing member 505 and the arms 5044 form a guiding fit and can guide the opening of the two arms 5044.

[0057] Specifically in this embodiment, Figure 7As shown, the elastic telescopic member 504 is shaped like an M-shaped structure as a whole; a connecting hole 5022 is opened on the plate surface of the heat medium plate 502, and two body parts 5043 are respectively arranged on both sides of the connecting hole 5022, and the body part 5043 and the plate surface of the heat medium plate 502 are arranged vertically to ensure that the heat medium can be introduced, and the middle part of the body part 5043 is arranged as a corrugated structure to ensure that the elastic telescopic member 504 can extend in a direction perpendicular to the plate surface of the heat medium plate 502; the arm part 5044 is a square-like shape, and the two arm parts 5044 together form an eight-shaped structure, and the small mouth faces the adjacent heat medium plate 502, ensuring that the two arm parts 5044 are inclined outward; the ear part 5045 is an S-like structure and is arranged on the top of the arm part 5044; the head part 5041 is arranged as an arc-shaped structure. The structure is shaped like a right triangle, and the convex surface faces the adjacent heat medium plate 502; and the lateral dimensions of the head 5041 and the two ears 5045 are greater than the lateral dimensions of the slot 5021, so that the head 5041 and the two ears 5045 can be engaged with the slot 5021 only after they shrink and deform; the support portion 5042 is configured as a type-I structure, and is horizontally placed between the two arms 5044; the sealing fixing member 505 is configured as a type-right triangle structure, which can seal the body 5043 and the heat medium plate 502 on the one hand, and can support the body 5043 and the heat medium plate 502 respectively on the other hand, and the hypotenuses of the two sealing fixing members 505 together form an eight-shaped shape, and the small mouth of the eight-shaped shape faces the adjacent heat medium plate 502, ensuring that the two arms 5044 can be guided outward.

[0058] During the assembly process, the heat medium plate 502 is first aligned so that the elastic expansion member 504 is aligned with the card slot 5021, and then the heat medium plate 502 is pressed inward to move. Since the lateral dimensions of the head 5041 and the two ears 5045 are larger than the lateral dimensions of the card slot 5021, the elastic expansion member 504 is pressed against the opening of the card slot 5021. As the heat medium plate 502 continues to move, the body 5043 of the elastic expansion member 504 is compressed by pushing the opening of the card slot 5021, and then the two arms 5044 are opened under the guidance of the sealing fixing member 505. Figure 8 As shown, at the same time, the distance between the two ears 5045 gradually becomes closer under the action of the fulcrum of the support portion 5042, and the curvature of the head 5041 gradually increases, so that the lateral dimensions of the two ears 5045 and the head 5041 gradually become smaller, so that they can gradually be inserted into the slot 5021.

[0059] When the two ears 5045 and the head 5041 are roughly inserted into the slot 5021, the heat medium plate 502 is released, the body 5043 is reset under its own elasticity, the arm 5044 is reset under its own elasticity, the curvature of the head 5041 is gradually reduced under its own elasticity, and the distance between the two heads 5041 is gradually increased. Fig. 9 As shown, until the two ears 5045 are completely inserted into the slots 5021.

[0060] During assembly, as the curvature of the head 5041 gradually increases, the air in the slot 5021 is gradually discharged as the heat medium plate 502 moves; when the curvature of the head 5041 gradually decreases under the action of its own elasticity, the space between the head 5041 and the slot 5021 gradually increases, the air pressure gradually decreases, and a negative pressure is formed, while there is a positive pressure between the heat medium plate 502 and the adjacent heat medium plate 502. Under the action of the pressure difference, the elastic telescopic member 504 has a tendency to be inserted into the slot 5021, thereby facilitating improving the stability of the connection between the elastic telescopic member 504 and the slot 5021.

[0061] Then, the above process is repeated until all the heat medium plates 502 are assembled together, and then the heat medium plates 502 are integrally sleeved on the guide rods 5015 , and then the shell 501 is closed, and the assembly of the heat regenerator 5 is completed.

[0062] Before the heat medium is introduced into the heat medium plate 502, Fig. 9 As shown, the distance between adjacent heat medium plates 502 is A.

[0063] After the heat medium passes into the elastic expansion member 504, the heat medium drives the body 5043 of the elastic expansion member 504 to extend, so that the elastic expansion member 504 extends as a whole, and the adjacent heat medium plate 502 moves away from the heat medium plate 502 under the push of the elastic expansion member 504; Fig.10 As shown, after the adjacent heat medium plates 502 move, the distance between the adjacent heat medium plates 502 is B, and B is greater than A, so that the volume of the first sealed chamber can be increased, and then the flow space of the refrigerant can be increased, the resistance to the flow of the refrigerant can be reduced, and the flow rate of the refrigerant can be increased, thereby improving the heat exchange efficiency between the refrigerant and the heat medium, and ensuring the efficient heating of the supercritical carbon dioxide heat pump.

[0064] Optionally, under the push of the sealing fixing member 505, the two arms 5044 are initially in an open state, and the two arms 5044 tend to close due to their own elasticity. Then, when heat medium flows in, the heat medium drives the body 5043 of the elastic telescopic member 504 to extend, and the body 5043 drives the arms 5044 to separate from the sealing fixing member 505. Then, under the action of their own elasticity, the two arms 5044 close at the same time, and at the fulcrum of the support portion 5042, the distance between the two ears 5045 tends to become farther, thereby improving the connection reliability between the elastic telescopic member 504 and the slot 5021.

[0065] In a further embodiment, the elastic telescopic member 504 also has two sealing parts 506, which are arranged on the head 5041 and located between the two ears 5045. When the elastic telescopic member 504 and the card slot 5021 form a snap fit, a second sealed chamber is formed between the two sealing parts 506.

[0066] Specifically in this embodiment, after the ear portion 5045 is fully inserted into the slot 5021, the sealing portion 506 can form a stopper cooperation with the slot 5021 to form a second sealed chamber. The setting of the sealing portion 506 can improve the sealing of the second sealed chamber, so that the pressure difference between the inside and outside of the second sealed chamber can be maintained for a long time, so that the elastic telescopic part 504 has a tendency to be inserted into the slot 5021 under the action of the pressure difference, which is beneficial to further improve the clamping stability between the elastic telescopic part 504 and the slot 5021.

[0067] In a further embodiment, a sealant 507 is filled between the card slot 5021 and the sealing portion 506 .

[0068] Specifically in this embodiment, the provision of the sealant 507 can, on the one hand, further improve the sealing performance of the second sealed chamber, and on the other hand, prevent the refrigerant from entering the slot 5021. Since the refrigerant itself has a certain pressure, when the refrigerant moves into the slot 5021, it has a tendency to push the elastic telescopic component 504 out of the slot 5021, thereby reducing the pushing effect of the elastic telescopic component 504 on the adjacent heat medium plate 502.

[0069] In addition, before assembling the heat transfer plate 502 , the sealant 507 may be first injected into the card slot 5021 to avoid the trouble of injection at a later time.

[0070] In other embodiments, the sealing portion 506 is configured as a J-shaped structure, and the bending sections of the two sealing portions 506 are disposed opposite to each other.

[0071] Specifically in this embodiment, Figure 7 As shown, the bending section of the sealing portion 506 located on the left is bent toward the left, and the bending section of the sealing portion 506 located on the right is bent toward the right, ensuring that the bending sections of the two sealing portions 506 are arranged opposite to each other.

[0072] During use, when the air in the slot 5021 flows out from the gap between the sealing portion 506 and the slot 5021, since it follows the J-shape, the air encounters less resistance and can flow out more easily; and when the air in the refrigerant flow space flows into the gap between the sealing portion 506 and the slot 5021, since it goes against the J-shape, the air encounters greater resistance, making it more difficult to flow out, thereby helping to improve the sealing of the second sealed chamber.

[0073] In other embodiments, the elastic stretchable member 504 is configured as a strip structure.

[0074] Specifically in this embodiment, the elastic expansion member 504 can be configured to extend in the up-down direction, so as to counteract the deformation (bending) of the heat medium plate 502 in the left-right direction, thereby facilitating enhancing the structural strength of the heat medium plate 502 .

[0075] Matchingly, the card slot 5021 extends in the up-down direction to ensure that it can cooperate with the elastic telescopic member 504 .

[0076] In a further embodiment, the elastic expansion member 504 is configured to extend along the fold line. In this way, when the heat medium pressure changes, the elastic expansion member 504 can generate multi-directional elastic deformation by means of the fold line structure; specifically, when the heat medium pressure acts unevenly on the heat medium plate 502, the elastic expansion member 504 of the fold line structure can be adaptively adjusted at different folding angles to effectively disperse the pressure, greatly improving the support and anti-deformation capabilities of the heat medium plate 502 in multiple dimensions.

[0077] Matchingly, the card slot 5021 extends along the fold line to ensure that it can cooperate with the elastic telescopic member 504.

[0078] In other embodiments, there are multiple elastic expansion members 504 provided on each heat medium plate 502, and the multiple elastic expansion members 504 on the same heat medium plate 502 extend in the same direction. In this way, on the one hand, the heat medium plate 502 can be pushed evenly, and the heat medium plate 502 can be prevented from tilting and deforming due to uneven force, thereby affecting the normal flow of the refrigerant between the plates and the heat exchange efficiency with the heat medium. On the other hand, the structural strength of the heat medium plate 502 can be enhanced. Specifically, when the heat medium flows into the heat medium plate 502, the heat medium plate 502 is susceptible to pressure shock and deformation risk. The multiple elastic expansion members 504 are like multiple stable support points, providing support force to the heat medium plate 502 from different positions, effectively dispersing the heat medium pressure, and limiting the deformation trend of the heat medium plate 502. This multi-point support structure greatly enhances the structural stability of the heat medium plate 502 when it is subjected to the heat medium pressure, reduces the possibility of damage to the heat medium plate 502 due to deformation, prolongs the service life of the heat medium plate 502, and ensures the long-term stable operation of the heat regenerator 5.

[0079] Matchingly, except for the frontmost heat medium plate 502 , a plurality of slots 5021 are provided on the front plate surface of each heat medium plate 502 and the support plate 510 to ensure that they can be snap-fitted with a plurality of elastic retractable members 504 on adjacent heat medium plates 502 .

[0080] Specifically in this embodiment, Figure 5 As shown, there are seven elastic expansion members 504 on the same heat transfer plate 502, and the seven elastic expansion members 504 are arranged side by side. The elastic expansion member 504 in the middle is a straight line structure, and the three elastic expansion members 504 on both sides are a broken line structure and are symmetrically arranged about the elastic expansion member 504 in the middle; Figure 6As shown, there are seven card slots 5021 on the same heat medium plate 502 , and the seven card slots 5021 are arranged side by side, and the shapes are the same as the shapes of the elastic expansion members 504 on the adjacent heat medium plates 502 .

[0081] In a further embodiment, an elastic expansion member 504 located in the middle of the same heat medium plate 502 divides the first sealed chamber into two interconnected flow areas, and allows the refrigerant to form a U-shaped flow path.

[0082] Specifically in this embodiment, Figure 5 As shown, an elastic telescopic member 504 located in the middle extends downward to disconnect the lateral connection between the refrigerant inlet 5011 and the refrigerant outlet 5012, so that the refrigerant needs to flow along an inverted U-shaped flow path under the obstruction of the elastic telescopic member 504, thereby increasing the flow distance of the refrigerant and making the refrigerant heat exchange more sufficient.

[0083] The technical features of the above embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0084] The above embodiments only express several implementation methods 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 those of ordinary skill in the art, several variations 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.

Claims

1. A supercritical carbon dioxide heat pump with a regenerator, characterized in that: The supercritical carbon dioxide heat pump with a regenerator comprises a compressor, a condenser, a throttling device, an evaporator and a regenerator. The regenerator comprises a shell, on which a refrigerant inlet, a refrigerant outlet, a heat medium inlet and a heat medium outlet are arranged. The refrigerant inlet is connected to the outlet of the evaporator, the refrigerant outlet is connected to the suction port of the compressor, the exhaust port of the compressor is connected to the inlet of the condenser, the outlet of the condenser is connected to the heat medium inlet, the heat medium outlet is connected to the inlet of the throttling device, and the outlet of the throttling device is connected to the inlet of the evaporator; a plurality of stacked heat medium plates are inserted in the shell, and the heat medium plates can slide elastically in a direction perpendicular to their own plate surfaces , the heat medium plate is a shell-like structure, all the heat medium plates are interconnected, and are connected to the heat medium inlet and the heat medium outlet; adjacent heat medium plates are connected with telescopic rings, which can be telescopic along their own axis direction, and adjacent heat medium plates and telescopic rings are jointly surrounded to form a first sealed chamber, which is connected to the refrigerant inlet and the refrigerant outlet; two adjacent heat medium plates form a group, and the heat medium plates of different groups located on the same side are connected and provided with elastic telescopic parts on the plate surface close to another heat medium plate of the same group, and the elastic telescopic parts are configured to be able to stretch in a direction perpendicular to the plate surface of the heat medium plate when the heat medium flows in, so as to stretch the telescopic ring; The heat transfer plates of the same group located on the other side are provided with a card slot on the plate surface close to another heat transfer plate, and the card slot and the elastic telescopic member form a card-fitting fit; The elastic telescopic member is a shell-shaped structure, and has a head, a support part, two body parts, two arms and two ears. The body part is a telescopic structure, and the two body parts are arranged on the heat medium plate at intervals; the two arms are arranged on the two body parts respectively, and are arranged to be inclined outward; the two ears are arranged on the two arms respectively; the head part is arranged on the two ears at the same time, and is located between the two ears; the support part is arranged between the two arms, and is configured to be able to serve as a fulcrum to support the deformation of the arms and ears; The head and the two ears can be snapped into the card slot after shrinking and deforming; a sealing fixing piece is arranged between the body and the heat medium plate, and the sealing fixing piece and the arm form a guiding fit and can guide the two arms to open.

2. The supercritical carbon dioxide heat pump with a regenerator according to claim 1, characterized in that: The elastic telescopic member also has two sealing parts, which are arranged on the head and located between the two ears. When the elastic telescopic member and the card slot form a snap fit, a second sealed chamber is formed between the two sealing parts.

3. The supercritical carbon dioxide heat pump with a regenerator according to claim 2, characterized in that: The space between the card slot and the sealing portion is filled with sealant.

4. The supercritical carbon dioxide heat pump with a regenerator according to claim 2, characterized in that: The sealing portion is a J-shaped structure, and the bending sections of the two sealing portions are arranged opposite to each other.

5. The supercritical carbon dioxide heat pump with a regenerator according to claim 1, characterized in that: The elastic telescopic member is a strip structure.

6. The supercritical carbon dioxide heat pump with a regenerator according to claim 5, characterized in that: The elastic stretchable part extends along the trend of the fold line.

7. The supercritical carbon dioxide heat pump with a regenerator according to claim 5, characterized in that: There are multiple elastic expansion members arranged on each heat medium plate, and the multiple elastic expansion members on the same heat medium plate extend in the same direction.

8. The supercritical carbon dioxide heat pump with a regenerator according to claim 7, characterized in that: An elastic expansion member located in the middle of the same heat medium plate divides the first sealed chamber into two flow areas that are interconnected, and allows the refrigerant to form a U-shaped flow path.

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