Air source heat pump unit integration device

Abstract

This invention provides an integrated air-source heat pump unit, including a water supply assembly, a steam generation assembly, and a piping assembly. The water supply assembly includes a heat-absorbing pipe disposed within a heat exchange chamber. Water is preheated by flue gas in the heat exchange chamber within the heat-absorbing pipe and then enters the lower cavity via the piping assembly, subsequently flowing into multiple heat exchange tubes. This relates to the field of air-source heat pumps. By incorporating a heat-absorbing pipe in the water supply assembly and arranging it within a heat exchange chamber communicating with the combustion chamber, the high-temperature flue gas after combustion flows through the heat exchange chamber before being discharged, preheating the incoming water by flushing the heat-absorbing pipe. This structure fully utilizes the waste heat of the flue gas, effectively reducing the exhaust temperature, minimizing exhaust heat loss, and improving the energy efficiency of the device.

Description

Technical Field

[0001] This invention relates to the field of air source heat pumps, specifically to an integrated air source heat pump unit. Background Technology

[0002] Air source heat pump units, as a highly efficient and energy-saving heating device, are widely used in heating, hot water, and industrial steam supply. In applications requiring steam generation, a steam generator is typically integrated into the heat pump unit. This generator heats the water in the heat exchange tubes through a burner, causing it to vaporize and thus output steam.

[0003] In existing integrated steam generators, the high-temperature flue gas generated during combustion in the combustion chamber still carries a significant amount of waste heat after the main heat exchange with the heat exchange tubes. This high-temperature flue gas is typically discharged directly into the external environment through the exhaust duct, failing to effectively utilize the waste heat. This results in high exhaust heat loss and a low overall energy efficiency of the unit. Simultaneously, the feed water temperature entering the heat exchange tubes is low, requiring the water to absorb considerable heat to reach its vaporization temperature, thus affecting the steam generation rate and system operating efficiency. Therefore, effectively recovering waste heat from the flue gas to preheat the feed water, reducing the exhaust temperature, and improving the overall system energy efficiency have become urgent technical problems to be solved for this type of unit. Summary of the Invention

[0004] According to an embodiment of the present invention, an integrated air source heat pump unit is provided to address the problems existing in the background.

[0005] In a first aspect of the invention, an integrated device for an air source heat pump unit is provided.

[0006] The integrated air source heat pump unit includes a water supply assembly, a steam generation assembly, and a piping assembly; The steam generating assembly includes a heat exchange box, a combustion chamber, multiple heat exchange tubes, and a burner; The heat exchange box is connected to the combustion chamber. The burner is located inside the combustion chamber. There are cavities above and below the interior of the combustion chamber. Multiple heat exchange tubes are connected to the interior of the combustion chamber, and the upper and lower ends of the multiple heat exchange tubes are respectively connected to the cavities located on the upper and lower sides. The burner is located outside the heat exchange tubes. The water supply assembly includes a heat absorption pipe, which is installed inside the heat exchange box. After the water is preheated by the flue gas in the heat exchange box inside the heat absorption pipe, it enters the cavity located below through the pipe assembly and then enters the multiple heat exchange tubes.

[0007] Preferably, the steam generating assembly further includes a steam outlet that passes through the combustion chamber and communicates with the cavity located above it.

[0008] Preferably, the plurality of heat exchange tubes are arranged in a ring around the axis of the combustion chamber, and the burner is located in the middle of the combustion chamber.

[0009] Preferably, the steam generating assembly further includes a flue, on which a flue outlet is provided. The flue is connected to the heat exchange box, and the flue outlet is arranged vertically upward.

[0010] Preferably, the piping assembly includes a pump body, a water tank, a first pipe body, and a second pipe body; The input end of the pump body is connected to the water tank, the water tank is connected to the second pipe body, the output end of the pump body is connected to the first pipe body, and the first pipe body passes through the combustion chamber and communicates with the cavity located below.

[0011] Preferably, one end of the heat absorption pipe passes through the heat exchange box, and the other end of the heat absorption pipe exits from the inner wall of the heat exchange box and is connected to the second pipe.

[0012] Preferably, the water supply assembly includes a water supply pipeline, valves, and a water pump; The water supply pipeline is connected to the water pump via a valve, and the heat absorption pipeline is also connected to the water pump.

[0013] Preferably, it also includes a distribution assembly, wherein the burner is provided with multiple sets of ignition coils; the distribution assembly includes a bracket, a main pipe, multiple air outlets, an annular baffle, and a connecting rod; The bracket is connected to the combustion chamber. Multiple sets of ignition coils are provided on the bracket. Multiple air outlets are opened on the main pipe and are divided into multiple groups with the same number as the ignition coils. Each group of air outlets is located above the corresponding ignition coil. The annular baffle is slidably connected to the inner wall of the main pipe. The annular baffle can block part of the air outlet and adjust the air intake. The connecting rod is connected to the top of the annular baffle.

[0014] Preferably, the distribution assembly further includes a combustion gas inlet pipe that passes through the combustion chamber and the cavity, and is ultimately disposed inside the combustion chamber and communicates with the main pipe.

[0015] Preferably, it also includes a housing, wherein the heat exchange housing and the combustion chamber are disposed inside the housing.

[0016] One or more technical solutions provided in this application have at least the following technical effects or advantages: This invention provides an integrated air-source heat pump unit. By incorporating heat-absorbing pipes into the water supply assembly and arranging these pipes within a heat exchange box connected to the combustion chamber, the high-temperature flue gas after combustion flows through the heat exchange box before being discharged, preheating the inlet water by flushing the heat-absorbing pipes. This structure fully utilizes the waste heat of the flue gas, effectively reducing the exhaust temperature, minimizing exhaust heat loss, and improving the energy efficiency of the device.

[0017] It should be understood that the description in the Summary of the Invention is not intended to limit the key or essential features of the embodiments of the present invention, nor is it intended to restrict the scope of the invention. Other features of the invention will become readily apparent from the following description. Attached Figure Description

[0018] The above and other features, advantages, and aspects of the various embodiments of the present invention will become more apparent from the accompanying drawings and the following detailed description. In the drawings, the same or similar reference numerals denote the same or similar elements, wherein: Figure 1 A schematic diagram of the connection structure of an integrated air source heat pump unit according to an embodiment of the present invention is shown; Figure 2 An exploded view of an integrated air-source heat pump unit according to an embodiment of the present invention is shown; Figure 3 A schematic diagram of the planar connection structure of an integrated air source heat pump unit according to an embodiment of the present invention is shown; Figure 4 A cross-sectional view of an integrated air-source heat pump unit according to an embodiment of the present invention is shown; Figure 5 A planar explosion of an integrated air-source heat pump unit according to an embodiment of the present invention is shown; Figure 6 A schematic diagram of the connection structure of the regulating component of the integrated air source heat pump unit according to an embodiment of the present invention is shown; Figure 7 A schematic diagram of the connection structure of the distribution component of the air source heat pump unit integrated device according to an embodiment of the present invention is shown; Figure 8 A schematic diagram of a partial connection structure of the distribution component of an integrated air source heat pump unit according to an embodiment of the present invention is shown; Figure 9 A schematic diagram of the connection structure of the air outlet of the integrated air source heat pump unit according to an embodiment of the present invention is shown; Figure 10 An exploded view of the distribution components of an integrated air-source heat pump unit according to an embodiment of the present invention is shown.

[0019] The attached figures are labeled as follows: 1-Box body, 2-Steam generating assembly, 21-Heat exchange box body, 22-Flue duct, 221-Flue outlet, 23-Combustion chamber, 231-Cavity, 24-Heat exchange tube, 25-Burner, 251-Ignition coil, 26-First tube body, 27-Pump body, 28-Water tank, 29-Second tube body, 3-Water supply assembly, 30-Steam outlet, 31-Water supply pipeline, 32-Valve, 33-Water pump, 34-Heat absorption pipeline, 4-Distribution assembly, 41-Combustion gas inlet pipe, 42-Bracket, 43-Main pipe, 44-Gas outlet, 45-Annular baffle, 46-Connecting rod, 5-Adjusting assembly, 51-Motor, 52-Rotating plate, 53-Spring, 54-Contact head, 55-Spherical body, 56-Screw, 57-Handle, 58-Support. Detailed Implementation

[0020] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0021] Furthermore, the term "and / or" in this article is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone. Additionally, the character " / " in this article generally indicates that the preceding and following related objects have an "or" relationship.

[0022] like Figures 1 to 10 As shown in the figure, this embodiment provides an integrated air source heat pump unit. The device mainly includes a housing 1, a water supply assembly 3, a steam generation assembly 2, a piping assembly, a distribution assembly 4, and a regulating assembly 5. The steam generation assembly 2 and the heat exchange housing 21 are all located inside the housing 1.

[0023] The steam generating assembly 2 includes a heat exchange box 21, a combustion chamber 23, multiple heat exchange tubes 24, and a burner 25. The heat exchange box 21 and the combustion chamber 23 are interconnected, allowing the high-temperature flue gas generated in the combustion chamber 23 to enter the heat exchange box 21. The combustion chamber 23 has a cavity 231 at its upper and lower parts. Multiple heat exchange tubes 24 are vertically arranged within the combustion chamber 23, with the upper end of each tube communicating with the upper cavity 231 and the lower end communicating with the lower cavity 231. The multiple heat exchange tubes 24 are arranged in a ring around the axis of the combustion chamber 23. The burner 25 is fixed in the middle of the combustion chamber 23, inside the annular area formed by the heat exchange tubes 24, so that the flame and high-temperature flue gas can evenly scour the outer walls of each heat exchange tube 24. The steam generating assembly 2 is also provided with a steam outlet 30, which passes through the wall of the combustion chamber 23 and communicates with the upper cavity 231 to output the generated steam to the steam-using equipment. After exchanging heat with the heat exchange tube 24, the high-temperature flue gas generated by combustion enters the heat exchange box 21 upwards or to the side. The steam generating assembly 2 is also provided with a flue duct 22, on which a flue outlet 221 is opened. The flue duct 22 communicates with the internal space of the heat exchange box 21, and the flue outlet 221 is set vertically upwards to facilitate the smooth discharge of the heat-exchanged flue gas.

[0024] The water supply assembly 3 is used to supply water to be heated to the steam generating assembly and to preheat it using waste heat from the flue gas. The water supply assembly 3 includes a water supply pipe 31, a valve 32, a water pump 33, and a heat absorption pipe 34. The water supply pipe 31 is connected to the inlet of the water pump 33 via the valve 32, and the outlet of the water pump 33 is connected to one end of the heat absorption pipe 34. The main body of the heat absorption pipe 34 is arranged inside the heat exchange chamber 21 and can be in the form of a coil or finned tube to increase the heat exchange area. The other end of the heat absorption pipe 34 extends out from the wall of the heat exchange chamber 21 and is connected to the pipe assembly. Water flows within the heat absorption pipe 34, is preheated by the flue gas in the heat exchange chamber 21, and then enters the cavity 231 located below the combustion chamber 23 through the pipe assembly, and is subsequently distributed to each heat exchange tube 24.

[0025] The piping assembly, used to transport preheated water from the heat absorption pipe 34 to the lower cavity 231, includes a water tank 28, a pump body 27, a first pipe body 26, and a second pipe body 29. One end of the second pipe body 29 is connected to the outlet of the heat absorption pipe 34, and the other end is connected to the inlet of the water tank 28. The input end of the pump body 27 is connected to the outlet of the water tank 28, and the output end of the pump body 27 is connected to the first pipe body 26. The first pipe body 26 passes through the wall of the combustion chamber 23 and communicates with the lower cavity 231. In this way, the preheated water first enters the water tank 28 for buffer storage, and then is metered by the pump body 27 into the lower cavity 231 and the heat exchange pipe 24, ensuring a stable water supply.

[0026] In order to precisely control the combustion power and adapt to load changes, the device also includes a distribution component 4 and an adjustment component 5.

[0027] The burner 25 is equipped with multiple sets of ignition coils 251. The distribution assembly 4 includes a bracket 42, a main pipe 43, multiple gas outlets 44, an annular baffle 45, and a connecting rod 46. The bracket 42 is fixed inside the combustion chamber 23, and the multiple sets of ignition coils 251 are mounted on the bracket 42. The main pipe 43 is arranged inside the combustion chamber 23, and its input end is connected to the combustion gas inlet pipe 41. The combustion gas inlet pipe 41 passes through the wall and cavity 231 of the combustion chamber 23 from outside the housing 1, and finally extends into the inner side of the combustion chamber 23 to connect with the main pipe 43. Multiple sets of gas outlets 44 are opened on the pipe wall of the main pipe 43 (in this embodiment, they are divided into upper, middle, and lower height areas). The number of sets of gas outlets 44 is the same as the number of sets of ignition coils 251, and each set of gas outlets 44 corresponds to the ignition coil 251 at a corresponding position, so that the injected gas can be accurately ignited. An annular baffle 45 is slidably fitted onto the inner wall of the main pipe 43. By moving the annular baffle 45 up and down, a portion of the corresponding air outlet 44 can be blocked, thereby changing its effective flow area and achieving localized adjustment of the air intake volume. The lower end of the connecting rod 46 is fixedly connected to the top of the annular baffle 45, and its upper end passes upward through the top wall of the main pipe 43 and cooperates with the adjusting component 5. In this embodiment, three annular baffles 45 and three connecting rods 46 are provided, and each connecting rod 46 independently controls an annular baffle 45 in a certain height area.

[0028] The adjustment assembly 5 includes a motor 51, a rotating plate 52, a spring 53, a contact head 54, a ball 55, a support 58, a screw 56, and a handle 57. The motor 51 is installed inside the combustion gas inlet pipe 41, and its output end is connected to the rotating plate 52. Each connecting rod 46 is set to a different length according to the different height positions of its corresponding annular baffle 45 within the main pipe 43, ensuring that the top surfaces of each connecting rod 46 after extending beyond the top wall of the main pipe 43 remain flush. A contact head 54 is fixed to the top of each connecting rod 46, and the spring 53 is sleeved on the connecting rod 46 to ensure that the contact head 54 always has an upward tendency. Above each connecting rod 46, a corresponding ball 55 is provided, which is rotatably held within the support 58. The upper end of the support 58 is fixedly connected to the handle 57 via the screw 56, and the screw 56 is connected to the rotating plate 52 via a threaded hole. During initial assembly or shutdown, the initial installation height of the ball 55 can be set by rotating the handle 57 individually.

[0029] In a preferred embodiment of actual operation, the rotating plate 52 is arranged in a circumferential array with multiple sets of ball assemblies, each set containing three balls 55. Before assembly, each set of ball assemblies is pre-set to a different installation height by rotating the corresponding handle 57. During operation, the rotating plate 52 is rotated by the motor 51, switching between different sets of balls 55 to align with and contact the connecting rod 46 below. If the currently connected set of balls with a higher installation height has a smaller downward pressing stroke of the contact head 54, a smaller downward movement of the annular baffle 45, and a larger opening of the air outlet 44; when it is necessary to reduce the air intake, the motor 51 drives the rotating plate 52 to rotate, causing another set of balls with a lower installation height to contact the connecting rod 46, increasing the downward pressing distance of the contact head 54, increasing the downward movement of the annular baffle 45, and decreasing the opening of the air outlet 44. The spring 53 ensures that the contact head 54 automatically returns to its original position when the balls 55 switch or retract from contact.

[0030] In actual use, the water source is preheated by the flue gas inside the heat exchange box 21, and then pumped into the cavity 231 below the combustion chamber 23 by a water pump, flowing upward through each heat exchange tube 24. The combustion gas is ejected through the main pipe and each set of outlets 44 and burned inside the combustion chamber 23. The water is heated and vaporized to form steam, which rises into the upper cavity 231 for output. During operation, the motor 51 drives the rotating plate 52 to rotate and switch between preset spherical groups of different heights, thus achieving multi-level load adjustment. The structure is simple and reliable.

[0031] This invention, through a mechanical structure, pre-adjusts and controls the air output of the air outlets 44 at three different heights (upper, middle, and lower), enabling "on-demand reshaping" of the heat distribution within the combustion chamber, resulting in significant energy savings and efficiency improvements. Since the water in the heat exchange tube 24 flows from bottom to top, the medium inside the tube undergoes a significant phase change process: the lower section is primarily the preheating and initial boiling stage of liquid water, requiring substantial heat absorption; the middle section is the stage of vigorous vaporization of the steam-water mixture; and the upper section is mainly the stage of steam superheating and gas-liquid separation. Excessive heat supply can easily lead to localized dry burning or thermal fatigue of the tube walls.

[0032] The distribution and adjustment components of this device allow for maximum gas output at the bottom, moderate output in the middle, and reduced output at the top. This gradient combustion mode, characterized by a strong bottom fire and a gentle top fire, perfectly matches the phase change heat absorption law of water within a vertical pipe.

[0033] This design offers significant advantages in scenarios facing frequent load fluctuations, such as industrial brewing, food sterilization, or textile printing and dyeing. For example, during the initial heating stage of a food sterilization process, the equipment requires a large amount of high-temperature steam. At this time, the motor drives the rotating plate to switch to the "fully open" position, with the upper, middle, and lower sets of air outlets simultaneously outputting high heat to achieve rapid temperature increase and steam production. When the heat preservation and sterilization stage is reached, and the system only needs to supplement a small amount of heat to maintain pressure, the motor switches to the "heat preservation" position. At this time, the upper and middle air outlets can be significantly closed by using a preset sphere height, leaving only the lower air outlet to provide basic "bottom fire" to maintain water boiling. This not only completely eliminates the risk of dry burning of the upper heat exchange tubes under low-load conditions but also avoids energy waste caused by ineffective combustion of gas at the top, greatly improving the overall thermal efficiency of the heat pump unit and the service life of the equipment.

[0034] The specific embodiments described above do not constitute a limitation on the scope of protection of this invention. Those skilled in the art should understand that various modifications, combinations, sub-combinations, and substitutions can be made according to design requirements and other factors. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this invention should be included within the scope of protection of this invention.

Claims

1. An integrated device for an air source heat pump unit, characterized in that, It includes a water supply assembly (3), a steam generation assembly (2), and a piping assembly; The steam generating assembly (2) includes a heat exchange box (21), a combustion chamber (23), multiple heat exchange tubes (24) and a burner (25); The heat exchange box (21) is connected to the combustion chamber (23), the burner (25) is located inside the combustion chamber (23), and cavities (231) are provided above and below the interior of the combustion chamber (23). Multiple heat exchange tubes (24) are connected to the interior of the combustion chamber (23), and the upper and lower ends of the multiple heat exchange tubes (24) are respectively connected to the cavities (231) located on the upper and lower sides. The burner (25) is located outside the heat exchange tubes (24). The water supply assembly (3) includes a heat absorption pipe (34), which is located inside the heat exchange box (21). After the water is preheated by the flue gas in the heat exchange box (21) in the heat absorption pipe (34), it enters the cavity (231) located below through the pipe assembly and then enters the multiple heat exchange tubes (24).

2. The integrated air source heat pump unit according to claim 1, characterized in that, The steam generating assembly (2) also includes a steam outlet (30) that passes through the combustion chamber (23) and communicates with the cavity (231) located above.

3. The integrated air source heat pump unit according to claim 1, characterized in that, Multiple heat exchange tubes (24) are arranged in a ring around the axis of the combustion chamber (23), and the burner (25) is located in the middle of the combustion chamber (23).

4. The integrated air source heat pump unit according to claim 1, characterized in that, The steam generating assembly (2) also includes a flue (22), on which a flue outlet (221) is provided. The flue (22) is connected to the heat exchange box (21), and the flue outlet (221) is set vertically upward in the flue direction.

5. The integrated air source heat pump unit according to claim 1, characterized in that, The pipeline assembly includes a pump body (27), a water tank (28), a first pipe body (26), and a second pipe body (29); The input end of the pump body (27) is connected to the water tank (28), the water tank (28) is connected to the second pipe body (29), the output end of the pump body (27) is connected to the first pipe body (26), the first pipe body (26) passes through the combustion chamber (23) and communicates with the cavity (231) located below.

6. The integrated air source heat pump unit according to claim 5, characterized in that, One end of the heat absorption pipe (34) passes through the heat exchange box (21), and the other end of the heat absorption pipe (34) passes through the inner wall of the heat exchange box (21) and is connected to the second pipe (29).

7. The integrated air source heat pump unit according to claim 6, characterized in that, The water supply component (3) includes a water supply pipeline (31), a valve (32) and a water pump (33); The water supply pipeline (31) is connected to the water pump (33) through the valve (32), and the heat absorption pipeline (34) is connected to the water pump (33).

8. The integrated air source heat pump unit according to claim 1, characterized in that, It also includes a distribution assembly (4), on which multiple sets of ignition coils (251) are provided; the distribution assembly (4) includes a bracket (42), a main pipe (43), multiple air outlets (44), an annular baffle (45) and a connecting rod (46). The bracket (42) is connected to the combustion chamber (23). Multiple sets of ignition coils (251) are provided on the bracket (42). Multiple air outlets (44) are opened on the main pipe (43) and the multiple air outlets (44) are divided into multiple groups with the same number as the ignition coils (251). Each set of air outlets (44) is located above the corresponding ignition coil (251). The annular baffle (45) is slidably connected to the inner wall of the main pipe (43). The annular baffle (45) can block part of the air outlet (44) and adjust the air intake. The connecting rod (46) is connected to the top of the annular baffle (45).

9. The integrated air source heat pump unit according to claim 8, characterized in that, The distribution assembly (4) also includes a combustion gas inlet pipe (41) that passes through the combustion chamber (23) and the cavity (231) and is finally located inside the combustion chamber (23) and communicates with the main pipe (43).

10. The integrated air source heat pump unit according to claim 9, characterized in that, It also includes a housing (1), the heat exchange housing (21) and the combustion chamber (23) being disposed inside the housing (1).

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