Efficient and energy-saving carbon dioxide heat pump unit

Abstract

The invention relates to an efficient and energy-saving carbon dioxide heat pump unit applied to the related technical field of heating, by dividing the internal shell pass of a heat exchanger, the moving path of a heating medium carbon dioxide can be effectively shortened during heat exchange, and therefore the temperature difference between water and the heating medium carbon dioxide is effectively kept. According to the heat pump unit, the heat exchange efficiency is greatly improved, the response speed of the heat pump unit is increased, and therefore the amount and time of cold water discharged before water becomes hot are effectively reduced, the energy-saving effect is achieved, and meanwhile the heat pump unit is more convenient for a user to use; in addition, by means of the arrangement of the gap monitoring unit, whether gaps exist between the gap plates and the heat exchanger or not can be monitored after the cavities are determined, the sealing performance between the cavities is effectively guaranteed, and the stability of the heat exchange process is higher.

Description

Technical Field

[0001] The present invention relates to a heat pump unit, and in particular to a high-efficiency and energy-saving carbon dioxide heat pump unit applied in the technical field related to heating. Background Art

[0002] Carbon dioxide heat pumps are increasingly widely used in various cooling and heating systems due to their environmentally friendly, high efficiency, low GWP value, and high energy density. Compared with conventional heat pump systems, carbon dioxide heat pumps have a higher outlet water temperature, which can reach 80°C at one time, and can effectively kill bacteria and viruses in the water; at the same time, the heat pump can still guarantee an outlet water temperature of more than 70°C in an environment of -20°C, and can be used in places with lower ambient temperatures.

[0003] Chinese patent CN118423735A discloses a carbon dioxide heat pump heating unit, which stores the heat provided by the carbon dioxide heat pump through a phase-change heat storage medium in a heat storage tank. The phase-change heat storage medium has the characteristics of high heat storage density and constant temperature, and can effectively coordinate the heat supply and heat demand of the carbon dioxide heat pump, thereby improving the energy utilization efficiency of the unit, and effectively alleviating the problem that the carbon dioxide heat pump has a large single heat output and frequent startup will also cause additional energy loss.

[0004] Chinese patent CN109724434B discloses a carbon dioxide heat exchanger and a carbon dioxide heat pump unit. The carbon dioxide heat exchanger realizes heat exchange by arranging a plurality of straight heat exchange tubes in the carbon dioxide heat exchanger, avoiding the use of traditional shell-and-tube heat exchangers with curved heat exchange tubes. The structure is compact, the space occupied by the carbon dioxide heat exchanger is reduced, and the straight tube processing is more convenient, thereby reducing the production and manufacturing cost of the entire carbon dioxide heat pump unit.

[0005] The above-mentioned existing carbon dioxide heat pump unit uses a long internal shell path of the heat exchanger when providing heating. The carbon dioxide as the heat medium has a long path in the heat exchanger. In the second half, the temperature difference between the heat medium and the water becomes smaller, which affects the heat exchange efficiency and causes the heat pump unit to respond slowly during heating. The faucet needs to release cold water for a long time before it can release hot water, resulting in a waste of water resources. Summary of the invention

[0006] In view of the above-mentioned prior art, the technical problem to be solved by the present invention is that the heat exchange efficiency is low, resulting in a slow thermal response speed of the heat pump unit.

[0007] In order to solve the above problems, the present invention provides an energy-efficient carbon dioxide heat pump unit, comprising a controller and a compressor, a heat exchanger, an expansion valve, a water storage tank and an evaporator electrically connected to the controller, the compressor, the heat exchanger, the expansion valve, the water storage tank and the evaporator are all connected to each other through pipelines, and the exhaust port of the evaporator is also connected to the air inlet of the compressor through a pipeline, the hot water outlet of the heat exchanger is connected to an external device, the water storage tank is wrapped with a heat preservation sleeve, and the air inlet of the expansion valve is fixed and communicated with the heat preservation sleeve; The left and right ends of the heat exchanger are respectively fixedly connected with a cold water inlet and a hot water outlet, the left and right inner walls inside the heat exchanger are fixedly connected with side plates, a plurality of evenly distributed heat exchange tubes are fixedly inserted between the two side plates, and a plurality of gap plates are also fixedly connected to the inner wall of the heat exchanger, the plurality of gap plates divide the shell between the two side plates into a plurality of chambers, a plurality of baffles are arranged in each chamber, two adjacent baffles are staggered, and the gap plates and the baffles are fixedly penetrated by the corresponding plurality of heat exchange tubes, a plurality of evenly distributed hot gas inlets are fixedly connected to the upper end of the compressor, a plurality of evenly distributed hot gas outlets are fixedly connected to the lower end of the compressor, a total air outlet pipe is fixedly connected to the lower ends of the plurality of hot gas outlets, the outlet of the total air outlet pipe is connected to the air inlet on the insulation sleeve, the plurality of hot gas inlets are connected to the discharge port on the water storage tank, and solenoid valves are arranged on the plurality of hot gas inlets and the plurality of hot gas outlets, and the solenoid valves are connected to the controller signal; The outer end of the heat exchanger is also fixedly wrapped with a plurality of outer control rings, the plurality of outer control rings respectively correspond to the plurality of gap plates in the heat exchanger, and the outer control rings are connected with the controller signal.

[0008] In the above-mentioned high-efficiency and energy-saving carbon dioxide heat pump unit, by dividing the shell side inside the heat exchanger, the movement path of the heat medium carbon dioxide can be effectively shortened during heat exchange, thereby effectively maintaining the temperature difference between water and the heat medium carbon dioxide. Compared with the existing technology, the heat exchange efficiency is greatly improved, and the water can be heated faster, thereby effectively reducing the amount of cold water released before the water becomes hot and the time, achieving energy-saving effects, while being more convenient for users to use.

[0009] As a further improvement of the present application, the multiple baffles are all D-shaped structures, and the cross-section of the baffles is larger than a semicircle, and along the direction of the water flow, the span of the multiple chambers becomes larger and larger.

[0010] As a further improvement of the present application, the gap plate includes a tube limiting plate body and a gap adjustment unit respectively fixedly connected to the upper and lower ends of the tube limiting plate body, the gap adjustment unit includes two gap adjustment lining strips respectively fixedly connected to the edges of the arc surface of the tube limiting plate body, and a gap adjustment sleeve wrapped around the end of the tube limiting plate body, the end of the gap adjustment sleeve extends to the middle of the upper end of the tube limiting plate body, and the arc-shaped end surface of the tube limiting plate body is completely attached to and fixed to the inner wall of the heat exchanger.

[0011] As a further improvement of the present application, the gap adjusting sleeve is made of a flexible sealing material, and after the gap adjusting sleeve is fully extended, the two gap adjusting sleeves and the cross section of the tube limiting plate body are assembled into a complete circle.

[0012] As a further improvement of the present application, the width of the outer control ring is not less than the width of the gap plate, and the part of the outer control ring facing the straight end face of the tube limiting plate body is made of electromagnetic material, the other parts of the tube limiting plate body are made of hard shaping material, the gap adjusting strip is made of elastic material, and the inside of the gap adjusting strip is fixedly inlaid with multiple evenly distributed ferromagnetic sheets.

[0013] As another improvement of the present application, the ends of the two gap adjusting strips that are close to each other are cross-distributed, a monitoring groove is excavated in the middle of the straight end surface of the tube limiting plate body, and a gap monitoring unit is arranged in the monitoring groove. The gap monitoring unit includes a double-arm monitoring strip connected to the middle of the monitoring groove, two gap-following ropes respectively connected between the two ends of the double-arm monitoring strip and the ends of the gap adjusting strip, and two laser rangefinders respectively installed on the two opposite inner walls of the monitoring groove, and the double-arm monitoring strip is located between the two laser rangefinders.

[0014] As another improved supplement of the present application, the double-arm monitoring strip includes a positioning plate fixedly connected to the middle inner wall of the monitoring groove and monitoring arms fixedly connected to the left and right sides of the positioning plate respectively. The monitoring arm includes an active section fixedly connected to the positioning plate and a passive section fixedly connected to the end of the active section.

[0015] As another improved supplement of the present application, the positioning plate and the passive section are both opaque hard shaped structures, and the connection point between the gap moving rope and the double-arm monitoring strip is located at the neck of the passive section, and the active section is an elastic transparent structure.

[0016] In summary, by dividing the shell side inside the heat exchanger, the movement path of the heat medium carbon dioxide can be effectively shortened during heat exchange, thereby effectively maintaining the temperature difference between water and the heat medium carbon dioxide. Compared with the existing technology, the heat exchange efficiency is greatly improved, the water can be heated faster, and the response speed of the heat pump unit is improved, thereby effectively reducing the amount of cold water released before the water becomes hot and the time, thereby achieving energy-saving effects and being more convenient for users to use. In addition, through the setting of variable gap plates, the size of the divided chambers in the heat exchanger can be adjusted to meet the heat exchange requirements under different circumstances. In addition, with the setting of the gap monitoring unit, after determining the chamber, it is possible to monitor whether there is a gap between the gap plate and the heat exchanger, effectively ensuring the sealing between each chamber, and making the heat exchange process more stable. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a main principle schematic diagram of the first implementation mode of the present application; Figure 2 This is a three-dimensional diagram of a heat exchanger according to a first embodiment of the present application; Figure 3 A partial cross-sectional view of a heat exchanger according to a first embodiment of the present application; Figure 4 This is a partial front view of a heat exchanger according to a first embodiment of the present application; Figure 5 This is a front view of the gap plate of the first embodiment of the present application; Figure 6 This is a side view schematic diagram of a first embodiment of the present application when there is a gap between the gap plate and the inner wall of the heat exchanger; Figure 7 This is a side view schematic diagram of the first embodiment of the present application when there is no gap between the gap plate and the inner wall of the heat exchanger; Figure 8 A schematic cross-sectional view of a gap plate portion of a second embodiment of the present application; Fig. 9 A schematic diagram of the end portions of two gap adjustment strips according to the second embodiment of the present application; Fig.10 This is a front view of the monitoring arm portion of the second embodiment of the present application; Fig.11 This is a schematic side view of the second embodiment of the present application when there is no gap between the gap plate and the inner wall of the heat exchanger.

[0018] Description of the numbers in the figure: 1 compressor, 2 heat exchanger, 3 expansion valve, 4 evaporator, 5 water tank, 501 insulation sleeve, 21 cold water inlet, 22 hot water outlet, 201 hot gas inlet, 202 hot gas outlet, 203 main gas outlet pipe, 61 gap plate, 62 external control ring, 611 tube limit plate body, 612 gap adjustment lining strip, 613 gap adjustment sleeve, 601 monitoring slot, 71 side plate, 72 baffle, 73 heat exchange tube, 8 double-arm monitoring strip, 81 positioning plate, 82 active section, 83 passive section, 801 follow-gap dynamic rope, 9 laser rangefinder. DETAILED DESCRIPTION

[0019] Two implementation modes of the present application are described in detail below with reference to the accompanying drawings.

[0020] The first implementation method: Figure 1FIG. 1 shows a highly efficient and energy-saving carbon dioxide heat pump unit, comprising a controller and a compressor 1, a heat exchanger 2, an expansion valve 3, a water tank 5 and an evaporator 4 electrically connected to the controller. The compressor 1, the heat exchanger 2, the expansion valve 3, the water tank 5 and the evaporator 4 are all connected to each other through pipelines, and the exhaust port of the evaporator 4 is also connected to the air inlet of the compressor 1 through a pipeline. The hot water outlet of the heat exchanger 2 is connected to an external device. The water tank 5 is wrapped with a heat preservation sleeve 501, and the air inlet of the expansion valve 3 is fixed and communicated with the heat preservation sleeve 501. When in use, when the controller receives an instruction to start the work, the compressor 1 starts, sucks in the carbon dioxide in the evaporator 4 and compresses it into high-temperature and high-pressure shape, and then passed into the heat exchanger 2, and at the same time, cold water enters the heat exchanger 2, so that the high-temperature and high-pressure carbon dioxide and the cold water exchange heat in the heat exchanger 2, so that the water absorbs the heat in the carbon dioxide, thereby the temperature rises, and is discharged from the hot water outlet 22 of the heat exchanger 2 to the external device. At the same time, part of the carbon dioxide gas is converted into liquid after cooling, so as to output a gas-liquid mixture. The gas-liquid mixture still contains some heat, which can be passed into the insulation sleeve 501 outside the water storage tank 5, so that the residual heat in it can be absorbed by the water in the water storage tank 5, thereby preheating the cold water in the water storage tank 5, effectively raising its basic temperature, and thereby making it reach the target temperature faster during heat exchange.

[0021] Among them, the external device can be a faucet, a shower, etc., or it can be other required equipment. When used, it can be configured according to actual needs.

[0022] like Figure 2-3 The left and right ends of the heat exchanger 2 are respectively fixedly connected with a cold water inlet 21 and a hot water outlet 22. The left and right inner walls of the heat exchanger 2 are fixedly connected with side plates 71. A plurality of evenly distributed heat exchange tubes 73 are fixedly inserted between the two side plates 71. The plurality of baffles 72 are all D-shaped structures, and the cross-section of the baffles 72 is larger than a semicircle. Figure 4The inner wall of the heat exchanger 2 is also fixedly connected with a plurality of gap plates 61, and the plurality of gap plates 61 divide the shell between the two side plates 71 into a plurality of chambers. A plurality of baffles 72 are arranged in each chamber, and two adjacent baffles 72 are staggered and distributed with each other, and the gap plates 61 and the baffles 72 are fixedly penetrated by the corresponding plurality of heat exchange tubes 73. The upper end of the compressor 1 is fixedly connected with a plurality of evenly distributed hot gas inlets 201, and the lower end of the compressor 1 is fixedly connected with a plurality of evenly distributed hot gas outlets 202. The lower ends of the plurality of hot gas outlets 202 are commonly fixedly connected with a total gas outlet pipe 203, and the outlet of the total gas outlet pipe 203 is connected to the air inlet on the insulation sleeve 501, and the plurality of hot gas inlets 201 are connected to the exhaust port on the water storage tank 5. Solenoid valves are arranged on the plurality of hot gas inlets 201 and the plurality of hot gas outlets 202. The solenoid valve is connected to the controller signal, so that the controller can select the opening and closing states of multiple hot gas inlets 201 and hot gas outlets 202 according to actual needs. Along the direction of water flow, the spans of multiple chambers become larger and larger. The closer to the water source, the lower the water temperature. At this time, the span of the corresponding chamber is smaller, so that the same amount of high-temperature and high-pressure carbon dioxide only needs to exchange heat with less water after entering it, so that the temperature difference between water and carbon dioxide near the hot gas outlet 202 is not too small. Compared with the situation in the prior art that the closer to the heat medium outlet, the lower the heat medium temperature, the above situation can be effectively avoided, so that a higher temperature difference is maintained between water and heat medium, thereby effectively ensuring heat exchange efficiency, accelerating water heating, and reducing the release time and release amount of cold water when the faucet is in use, thereby achieving the effect of saving resources.

[0023] The outer end of the heat exchanger 2 is also fixedly wrapped with a plurality of outer control rings 62, and the plurality of outer control rings 62 correspond to the plurality of gap plates 61 in the heat exchanger 2, and the outer control rings 62 are connected to the controller signal, such as Figure 5-6 The gap plate 61 includes a tube limiting plate body 611 and a gap adjusting unit respectively fixedly connected to the upper and lower ends of the tube limiting plate body 611, the gap adjusting unit includes two gap adjusting lining strips 612 respectively fixedly connected to the arc edge of the tube limiting plate body 611, and a gap adjusting sleeve 613 wrapped outside the end of the tube limiting plate body 611, the end of the gap adjusting sleeve 613 extends to the middle of the upper end of the tube limiting plate body 611, and the arc end surface of the tube limiting plate body 611 is completely attached to and fixed to the inner wall of the heat exchanger 2.

[0024] It is worth noting that the ends of the two gap adjusting strips 612 overlap each other when no force is applied, that is, the gap adjusting strips 612 are relatively long, so that when they are deformed and moved toward the inner wall of the heat exchanger 2 under force, they can drive the gap adjusting sleeve 613 to fully contact the inner wall of the heat exchanger 2, making it less likely that the gap adjusting sleeve 613 and the heat exchanger 2 will be partially free from the contact force of the gap adjusting strips 612 at the contact point, thereby effectively ensuring the stable separation of the two sides of the gap plate 61.

[0025] The gap adjusting sleeve 613 is made of a flexible sealing material, and after the gap adjusting sleeve 613 is fully extended, the two gap adjusting sleeves 613 and the cross section of the tube limiting plate body 611 are assembled into a complete circle, such as Figure 7 When it is necessary to fix the space inside the chamber, after the controller controls the outer control ring 62 to be energized, it can absorb the gap adjustment strip 612 and deform it toward the inner wall of the heat exchanger 2, thereby supporting the gap adjustment sleeve 613 until it contacts the inner wall of the heat exchanger 2. At this time, the gap adjustment sleeve 613 and the tube limiting plate body 611 form a complete circle, which can make the left and right sides of the gap plate 61 relatively sealed, so that the chambers on both sides remain relatively independent. When it is necessary to expand the space of a single chamber, the outer control ring 62 can be controlled to be de-energized, thereby releasing the gap adjustment strip 612, and then the gap adjustment sleeve 613 loses support and is in a relaxed state, so that the two chambers on both sides of the gap plate 61 are connected to temporarily form a chamber.

[0026] It is worth noting that the more chambers there are in the heat exchanger 2 and the smaller the single chamber is, the greater the overall heat exchange efficiency will be and the faster the water will heat up. In specific implementation, the corresponding outer control ring 62 can be controlled to be on and off according to actual needs to achieve control of the chamber size. When two or more adjacent chambers are merged into one connected chamber, the solenoid valves on the hot gas inlet 201 and the hot gas outlet 202 that are farthest away can be controlled to open, and the remaining solenoid valves can be controlled to close, so that one chamber only has one air inlet and one exhaust.

[0027] The width of the outer control ring 62 is not less than the width of the gap plate 61, and the portion of the outer control ring 62 facing the straight end surface of the tube limiting plate body 611 is made of electromagnetic material, and the other parts of the tube limiting plate body 611 are made of hard shaped materials. The gap adjusting lining strip 612 is made of elastic material, and the gap adjusting lining strip 612 is fixedly inlaid with multiple evenly distributed ferromagnetic sheets, which effectively ensures that the heat exchanger 2 can absorb the gap adjusting lining strip 612 after power is turned on, so that the gap adjusting sleeve 613 can be supported and close to the inner wall of the heat exchanger 2 and contact it, so as to achieve the sealing independence between the two chambers.

[0028] In the above-mentioned high-efficiency and energy-saving carbon dioxide heat pump unit, by dividing the internal shell side of the heat exchanger 2, the movement path of the heat medium carbon dioxide can be effectively shortened during heat exchange, thereby effectively maintaining the temperature difference between water and the heat medium carbon dioxide. Compared with the existing technology, the heat exchange efficiency is greatly improved, the water can be heated faster, and the response speed of the heat pump unit is improved, thereby effectively reducing the amount of cold water released before the water becomes hot and the time, achieving energy-saving effects, and being more convenient for users to use. In addition, through the setting of the variable gap plate 61, the size of the divided chamber in the heat exchanger 2 can be adjusted to meet the heat exchange requirements under different circumstances.

[0029] Second implementation mode: Based on the first implementation mode, this implementation mode adds a gap monitoring unit, and the rest of the parts are consistent with the first implementation mode.

[0030] like Figure 7 The ends of the two gap adjusting strips 612 that are close to each other are cross-distributed, so that when the two gap moving ropes 801 are not subjected to magnetic attraction, the ends are mutually displaced, but do not affect each other, which facilitates the connection between the gap moving ropes 801 and the ends of the double-arm monitoring strips 8. Figure 8 As shown, a monitoring groove 601 is cut in the middle of the straight end surface of the tube limiting plate body 611, and a gap monitoring unit is arranged in the monitoring groove 601. The gap monitoring unit includes a double-arm monitoring strip 8 connected to the middle of the monitoring groove 601, two gap-following moving ropes 801 respectively connected between the two ends of the double-arm monitoring strip 8 and the ends of the gap adjusting lining strip 612, and two laser rangefinders 9 respectively installed on the two opposite inner walls of the monitoring groove 601, and the double-arm monitoring strip 8 is located between the two laser rangefinders 9. Fig.10 The double-arm monitoring strip 8 includes a positioning plate 81 fixedly connected to the inner wall of the middle part of the monitoring groove 601 and monitoring arms fixedly connected to the left and right sides of the positioning plate 81 respectively. The monitoring arm includes an active section 82 fixedly connected to the positioning plate 81 and a passive section 83 fixedly connected to the end of the active section 82. The positioning plate 81 and the passive section 83 are both opaque hard fixed structures, and the connection point between the gap-moving rope 801 and the double-arm monitoring strip 8 is located at the neck of the passive section 83, and the active section 82 is an elastic transparent structure.

[0031] When it is not necessary to maintain the sealing of both sides of the gap plate 61, that is, when the chamber space is large, the heat exchanger 2 is not powered on, and the gap adjusting strip 612 remains in its original state. Figure 8 At this time, the double-arm monitoring strip 8 is in a horizontal state. At this time, the light emitted by the two laser rangefinders 9 is directed toward the opaque end of the double-arm monitoring strip 8. At this time, its data is small. At this time, there is a large gap between the gap plate 61 and the inner wall of the heat exchanger 2, so that the chambers on both sides are connected; Fig.11 When it is necessary to ensure the separation of the two side chambers, the heat exchanger 2 is energized to adsorb the gap adjustment lining strip 612 to move it, so that the end of the double-arm monitoring strip 8 is lifted up through the gap moving rope 801. As it is gradually lifted up, the data on the laser rangefinder 9 gradually increases. When the gap adjustment lining strip 612 contacts the inner wall of the heat exchanger 2, the gap between the gap plate 61 and the inner wall of the heat exchanger 2 is eliminated, the active section 82 is bent to a large extent, and the passive section 83 is lifted to a large extent, so that the laser emitted by the laser rangefinder 9 will shine on the active section 82 and pass through the active section 82 to reach the positioning plate 81. At this time, the data reaches the maximum. When in use, the controller can detect the gap between the gap plate 61 and the inner wall of the heat exchanger 2 according to the size change of the data on the laser rangefinder 9, thereby effectively ensuring that the heat exchange chamber can be clearly detected after an abnormality occurs, thereby effectively ensuring the stability of the heat exchange process, so that the heat pump unit maintains stable operation.

[0032] It is worth noting that the gap monitoring unit is only provided on the straight end of the tube plate body 611 facing upward, but not on the other side. In addition, to ensure stable monitoring, in this embodiment, the tube plate body 611 can be provided with a gap adjusting lining strip 612 and a gap adjusting sleeve 613 only on the upper side, and the downward edge is also provided in an arc shape that fits the inner wall of the heat exchanger 2.

[0033] In summary, by dividing the shell side inside the heat exchanger 2, the movement path of the heat medium carbon dioxide can be effectively shortened during heat exchange, thereby effectively maintaining a large temperature difference between water and the heat medium carbon dioxide. Compared with the existing technology, the heat exchange efficiency is greatly improved, so that the water can heat up faster, thereby effectively reducing the amount of cold water released and the time before the water heats up, achieving energy saving effects, and being more convenient for users to use. In addition, through the setting of the variable gap plate 61, the size of the divided chamber in the heat exchanger 2 can be adjusted to adapt to the heat exchange requirements under different circumstances. In addition, with the setting of the gap monitoring unit, after determining the chamber, it is possible to monitor whether there is a gap between the gap plate 61 and the heat exchanger 2, effectively ensuring the sealing between each chamber, and making the heat exchange process more stable.

[0034] In view of current practical needs, the above-mentioned implementation mode adopted in this application is not limited to the scope of protection. Various changes made within the knowledge scope of technical personnel in this field without departing from the concept of this application still fall within the scope of protection of the present invention.

Claims

1. A highly efficient and energy-saving carbon dioxide heat pump unit, characterized in that: The invention comprises a controller and a compressor (1), a heat exchanger (2), an expansion valve (3), a water storage tank (5) and an evaporator (4) electrically connected to the controller, wherein the compressor (1), the heat exchanger (2), the expansion valve (3), the water storage tank (5) and the evaporator (4) are connected to each other through a pipeline, and the exhaust port of the evaporator (4) and the air inlet of the compressor (1) are also connected through a pipeline, the water storage tank (5) is wrapped with a heat preservation sleeve (501), and the air inlet of the expansion valve (3) is fixed to and communicates with the heat preservation sleeve (501); The left and right ends of the heat exchanger (2) are respectively fixedly connected with a cold water inlet (21) and a hot water outlet (22); the left and right inner walls of the heat exchanger (2) are fixedly connected with side plates (71); a plurality of evenly distributed heat exchange tubes (73) are fixedly inserted between the two side plates (71); the inner wall of the heat exchanger (2) is also fixedly connected with a plurality of gap plates (61); the plurality of gap plates (61) divide the shell between the two side plates (71) into a plurality of chambers; a plurality of baffles (72) are arranged in each chamber; two adjacent baffles (72) are staggered and arranged with each other; and the gap plates (61) and the baffles (72) are correspondingly A plurality of heat exchange tubes (73) are fixedly passed through, the upper end of the compressor (1) is fixedly connected to a plurality of evenly distributed hot air inlets (201), the lower end of the compressor (1) is fixedly connected to a plurality of evenly distributed hot air outlets (202), the lower ends of the plurality of hot air outlets (202) are commonly fixedly connected to a total air outlet pipe (203), the outlet of the total air outlet pipe (203) is connected to the air inlet on the insulation sleeve (501), the plurality of hot air inlets (201) are connected to the outlet on the water storage tank (5), and the plurality of hot air inlets (201) and the plurality of hot air outlets (202) are each provided with an electromagnetic valve, and the electromagnetic valve is connected to a controller signal; The outer end of the heat exchanger (2) is also fixedly wrapped with a plurality of outer control rings (62), the plurality of outer control rings (62) respectively correspond to a plurality of gap plates (61) inside the heat exchanger (2), and the outer control rings (62) are connected to controller signals.

2. The high-efficiency and energy-saving carbon dioxide heat pump unit according to claim 1, characterized in that: The plurality of baffles (72) are all D-shaped structures, and the cross-section of the baffles (72) is larger than a semicircle, and along the direction of the water flow, the spans of the plurality of chambers become larger and larger.

3. The high-efficiency and energy-saving carbon dioxide heat pump unit according to claim 1, characterized in that: The gap plate (61) comprises a tube limiting plate body (611) and a gap adjustment unit respectively fixedly connected to the upper and lower ends of the tube limiting plate body (611); the gap adjustment unit comprises two gap adjustment lining strips (612) respectively fixedly connected to the edges of the arc surface of the tube limiting plate body (611), and a gap adjustment sleeve (613) wrapped around the end of the tube limiting plate body (611); the end of the gap adjustment sleeve (613) extends to the middle of the upper end of the tube limiting plate body (611); and the arc-shaped end surface of the tube limiting plate body (611) is completely attached to and fixed to the inner wall of the heat exchanger (2).

4. The high-efficiency and energy-saving carbon dioxide heat pump unit according to claim 3 is characterized in that: The gap adjusting sleeve (613) is made of a flexible sealing material, and after the gap adjusting sleeve (613) is fully extended, the two gap adjusting sleeves (613) and the cross section of the tube limiting plate body (611) are assembled into a complete circle.

5. The high-efficiency and energy-saving carbon dioxide heat pump unit according to claim 4, characterized in that: The width of the outer control ring (62) is not less than the width of the gap plate (61), and the portion of the outer control ring (62) facing the straight end surface of the tube limiting plate body (611) is made of electromagnetic material, and the other portions of the tube limiting plate body (611) are made of hard shaped material. The gap adjusting lining strip (612) is made of elastic material, and a plurality of evenly distributed ferromagnetic sheets are fixedly embedded inside the gap adjusting lining strip (612).

6. The high-efficiency and energy-saving carbon dioxide heat pump unit according to claim 5, characterized in that: The ends of the two gap adjusting lining strips (612) close to each other are cross-distributed, a monitoring groove (601) is cut in the middle of the straight end surface of the tube limiting plate body (611), a gap monitoring unit is arranged in the monitoring groove (601), and the gap monitoring unit comprises a double-arm monitoring strip (8) connected to the middle of the monitoring groove (601), two gap-following moving ropes (801) respectively connected between the two ends of the double-arm monitoring strip (8) and the ends of the gap adjusting lining strip (612), and two laser rangefinders (9) respectively installed on two opposite inner walls of the monitoring groove (601), and the double-arm monitoring strip (8) is located between the two laser rangefinders (9).

7. The high-efficiency and energy-saving carbon dioxide heat pump unit according to claim 6, characterized in that: The double-arm monitoring strip (8) comprises a positioning plate (81) fixedly connected to the inner wall of the middle portion of the monitoring slot (601) and monitoring arms fixedly connected to the left and right sides of the positioning plate (81), respectively. The monitoring arms comprise an active section (82) fixedly connected to the positioning plate (81) and a passive section (83) fixedly connected to the end of the active section (82).

8. The high-efficiency and energy-saving carbon dioxide heat pump unit according to claim 7, characterized in that: The positioning plate (81) and the passive section (83) are both opaque hard shaped structures, and the connection point between the gap-following moving rope (801) and the double-arm monitoring strip (8) is located at the neck of the passive section (83), and the active section (82) is an elastic transparent structure.

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