A heat pump coupled with a boiler heating device and a heating method thereof

Abstract

The present application relates to the technical fields of fluid heating, and discloses a heat pump and boiler coupled heat supply device and a heat supply method thereof, which comprises a heat pump unit and a boiler main body, a connecting pipe is installed between the heat pump unit and the boiler main body, a double helix assembly is arranged in the connecting pipe, the double helix assembly comprises an inner pipe, an outer threaded strip and an inner threaded strip, the inner pipe, the outer threaded strip and the inner threaded strip are arranged in the connecting pipe, so that the fluid forms a spiral fluid in the connecting pipe, the spiral flow makes the force of the fluid acting on the connecting pipe more uniform, the spiral flow mode uniformly disperses the force of the fluid, reduces the case that the local pipe suffers from excessive pressure, thereby improving the structural stability of the pipe, helps to reduce the deformation risk of the pipe due to uneven stress, greatly improves the overall mechanical properties of the pipe, effectively reduces the possibility of pipe damage, and the spiral fluid makes the heat transfer in the connecting pipe more uniform and efficient.

Description

Technical Field

[0001] The present invention relates to the technical field of fluid heating, and in particular to a heating device and a heating method thereof, wherein a heat pump is coupled to a boiler. Background Art

[0002] The heating device that couples a heat pump with a boiler is a fluid heater. This device extracts latent heat through a unique condensation effect. The heat pump and boiler work together. During the heating process, the heat pump's characteristics are used to extract and convert heat from the fluid. Combined with the boiler's heating capacity, it can efficiently provide heat energy to users.

[0003] However, existing heating devices still have some problems: First, in large-scale heating systems, due to their wide coverage and the need to connect different areas, the transmission pipelines are often long. At the same time, in order to reduce the occupation of ground space and avoid affecting ground facilities and traffic, these pipelines are often buried underground.

[0004] First, due to the long pipeline, heat is easily lost during the transmission process. Even if a thermal insulation layer is added to the outside of the pipeline, it can only improve the heat loss situation to a certain extent. Although the thermal conductivity of the underground soil is relatively small, due to the long length of the pipeline, the total heat loss is still considerable. This leads to a significant temperature drop in the process of fluid transmission from the heat pump to the boiler. Therefore, the temperature of the fluid reaching the boiler is lower than expected. The boiler needs to consume more energy to heat the fluid to the appropriate temperature, thereby reducing the energy utilization efficiency of the entire heating system.

[0005] Secondly, under the dual effects of fluid gravity and soil gravity, the pipeline is prone to deformation. In order to solve the problem of pipeline deformation, additional support structures are usually required. However, the support structure cannot completely cover the pipeline. For example, in order to facilitate the installation and maintenance of the pipeline, a certain amount of space needs to be reserved around the pipeline. This means that the support structure can only support the pipeline at some key positions. In local areas without support structure protection, the pipeline is still easily affected by gravity and other external forces and damaged. Once the pipeline is damaged, it will not only cause fluid leakage, but also affect the heating effect.

[0006] Secondly, in cold areas, the surface temperature of the heat pump's evaporator is often lower than the dew point temperature of the surrounding air. When humid air comes into contact with the evaporator surface, water vapor will condense into frost on the evaporator surface. The formation of the frost layer increases the thermal resistance and hinders the heat exchange between the evaporator and the outside air, thereby significantly reducing the heat pump's ability to absorb heat from the external environment.

[0007] As the frost layer continues to thicken, the air passages will gradually become blocked, which will reduce the air flow and further reduce the heat exchange efficiency of the evaporator. In addition, in low-temperature environments, the density and viscosity of the refrigerant will increase, which will cause the compressor to overcome greater resistance when compressing the refrigerant. According to the ideal gas state equation and the working principle of the compressor, the compressor's power consumption will increase, while the intake volume will decrease.

[0008] Secondly, in cold areas, due to the low suction temperature, the compression ratio of the compressor increases, deviating from its optimal working conditions, which reduces the adiabatic efficiency of the compressor and thus affects the efficiency of the entire heat pump system.

[0009] For this reason, gas-assisted heating is often used in the existing technology. Although the calorific value of gas is high, the installation and maintenance costs of gas equipment are high. Not only does it require laying special gas pipelines, but it also requires installing gas burners and other equipment, and regular safety inspections and maintenance are required, which increases the initial investment cost and operating cost of the heating device.

[0010] To this end, the present invention provides a heating device and a heating method thereof by coupling a heat pump with a boiler. Summary of the Invention

[0011] The object of the present invention is to provide a heating device and a heating method thereof coupled with a heat pump and a boiler, so as to solve the problems raised in the above background technology.

[0012] To achieve the above-mentioned object, the present invention provides the following technical solution: a heat pump and boiler coupled heating device, comprising a heat pump unit and a boiler body, a connecting pipe installed between the heat pump unit and the boiler body, a double helix component provided inside the connecting pipe, the double helix component comprising an inner tube, an outer thread strip, and an inner thread strip;

[0013] The inner tube is arranged inside the connecting tube, the external thread strip is fixedly connected between the connecting tube and the inner tube, and the internal thread strip is fixedly connected to the inside of the inner tube.

[0014] Preferably, the external thread strip gradually expands toward the side away from the heat pump unit, and the internal thread strip gradually contracts toward the side away from the heat pump unit.

[0015] Preferably, the thread directions of the external thread strip and the internal thread strip are opposite.

[0016] Preferably, a flow guide cover is installed in the connecting pipe and on a side close to the heat pump unit, and a partition is installed on the outer surface of the flow guide cover.

[0017] Preferably, a large hole is opened through the middle of the air deflector, and small holes are opened through the edge of the air deflector and are arranged in a circular shape and at equal intervals.

[0018] Preferably, the side of the partition away from the air guide cover gradually shrinks inwards.

[0019] Preferably, a raised pedestal is installed on the outer surface of the heat pump unit, and a gas compression assembly is symmetrically arranged on the top of the raised pedestal. The gas compression assembly includes a compression shell fixedly connected to the top of the raised pedestal, and a reciprocating drive member is installed inside the compression shell. A piston block is slidably connected inside the compression shell, and a reciprocating member is installed outside the piston block. The reciprocating drive member is used to drive the reciprocating member to drive the piston block to move. Two rows of holes are provided on the side where the two compression shells are close to each other, and a one-way valve is installed at each row of holes.

[0020] Preferably, a corrugated depression is provided on an edge of one side of the piston block close to the discharge hole, and a corrugated protrusion matching the shape of the corrugated depression is fixedly connected to the inner wall of the compression shell close to the discharge hole.

[0021] Preferably, the reciprocating drive member includes a motor and a half-gear connecting rod, the half-gear connecting rod is rotatably connected to the interior of the compression shell, and the motor is installed on the outer surface of the compression shell.

[0022] Preferably, the reciprocating member includes a tooth plate and two springs, the two springs are fixedly connected between the compression shell and the piston block respectively, the tooth plate is fixedly connected to the outer surface of the piston block, and the tooth plate is meshed with the half-gear connecting rod.

[0023] Preferably, the one-way valve located above is concentric with the upper row hole and is installed on the outer surface of the compression shell, and its opening direction is to open on the side away from the lower row hole. The one-way valve located below is concentric with the lower row hole and is installed on the inner surface of the compression shell, and its opening direction is to open on the side close to the upper row hole.

[0024] The heating method of coupling a heat pump with a boiler comprises the following steps:

[0025] Step 1: Start the heat pump unit and the gas compression component. The gas compression component extracts and compresses the ambient air and preheats the ambient air. At the same time, the heat pump unit extracts and compresses the preheated ambient air through the compressor, and uses the refrigerant to absorb the heat in the air in the evaporator. The heat is then transferred to the water through the condenser to achieve initial heating.

[0026] Step 2: The water initially heated by the heat pump unit is sent into the boiler body through the double-helix component;

[0027] Step 3: The boiler body uses natural gas as fuel to secondary heat the water sent from the heat pump unit;

[0028] Step 4: The control system will adjust the flow of hot water according to the outdoor temperature and heating demand;

[0029] Step 5: After secondary heating by the boiler body and flow and temperature control, the hot water is transported to the user terminal through a pipeline. At the terminal, the hot water releases heat to the indoor environment through the radiator.

[0030] Preferably, in step three, the rated power of the boiler body is 5000KW.

[0031] Compared with the prior art, the present invention has the following beneficial effects:

[0032] 1. By arranging an inner tube, an outer thread strip and an inner thread strip inside the connecting pipe, the fluid forms a spiral fluid inside the connecting pipe, and the spiral flow makes the force of the fluid acting on the connecting pipe more uniform. The spiral flow mode reduces the excessive pressure on the local part of the pipeline by evenly dispersing the force of the fluid, thereby improving the structural stability of the pipeline, helping to reduce the risk of deformation of the pipeline due to uneven force, greatly improving the overall mechanical properties of the pipeline, and effectively reducing the possibility of pipeline damage. At the same time, the spiral fluid makes the heat transfer in the connecting pipe more uniform and efficient, reduces the heat loss during the transmission process, and improves the energy utilization efficiency of the heating system.

[0033] Compared with existing heating devices, the connecting pipes of the existing technology are longer and mostly buried underground, resulting in serious heat loss. Although there is an insulation layer, the effect is limited, resulting in a significant drop in temperature of the fluid when it reaches the boiler body. The boiler body needs to consume more energy to heat the fluid. In the present invention, the spiral fluid improves the heat transfer effect and reduces heat loss during the transmission process, so that the temperature of the fluid when it reaches the boiler body is closer to the expected value, thereby reducing the additional energy consumption required by the boiler body to heat the fluid to the appropriate temperature, and improving the energy utilization efficiency of the entire heating system.

[0034] In terms of pipeline stability, existing pipelines are easily deformed under the dual effects of fluid gravity and soil gravity. Although there is a supporting structure, there is still the problem of local damage. The present invention enables the fluid to form a spiral flow, and the pipeline with uniform force is not easy to deform, which reduces the dependence on the supporting structure and reduces the risk of fluid leakage and heating effect affected by pipeline damage.

[0035] The expanding outer thread can guide and diffuse the fluid, making it more evenly distributed in the space between the inner and outer tubes; while the contracting inner thread can gradually concentrate the fluid inside the inner tube, further enhancing the spiral flow effect.

[0036] Among them: the opposite thread directions can make the fluid between the connecting pipe and the inner pipe and the fluid inside the inner pipe form a mutually coordinated spiral flow pattern. When the fluid between the connecting pipe and the inner pipe spirally flows in the direction of the external thread strips, it will generate a force in a specific direction on the inner pipe, and when the fluid inside the inner pipe spirally flows in the opposite direction of the internal thread strips, it will generate a force in the opposite direction on the inner pipe. These two forces in opposite directions offset each other to a part, further reducing the net force acting on the inner pipe, thereby improving the stability of the inner pipe and reducing the possibility of deformation or damage of the inner pipe due to force.

[0037] Among them: the presence of the partition can divert the fluid so that the fluid can be reasonably distributed before entering the subsequent part of the connecting pipe. Through different channels of large channels and small channels, the fluid is divided into different parts, which helps to adjust the flow rate and flow distribution of the fluid.

[0038] In addition to the various advantages mentioned above, the present invention also has the following additional benefits: the spiral flow mode helps to reduce the formation of scale. In traditional heating pipes, the flow state of the fluid easily causes impurities such as minerals in the water to deposit on the inner wall of the connecting pipe to form scale. The spiral flow causes the fluid to rotate continuously in the connecting pipe, which has a flushing effect on the inner wall of the connecting pipe, reducing the chance of impurities staying and depositing on the inner wall of the connecting pipe, thereby reducing the possibility of scale formation.

[0039] 2. The reciprocating drive member drives the reciprocating member to drive the piston block to reciprocate to extract and compress the surrounding air, which can increase the initial temperature of the surrounding air. Due to the collision of gas molecules, the internal energy of the air increases and the temperature is increased, which helps the heat pump unit to better absorb heat from the outside. Therefore, the gas compression component improves the heat pump unit's ability to absorb heat from the outside in a cold environment, helps to maintain the normal operating efficiency of the heat pump unit system, reduces the risk of reduced system efficiency due to low ambient temperature, and ensures the stable operation of the entire heating system.

[0040] Among them: the coordination of wave depressions and wave protrusions will cause gas molecules to collide more violently during movement. When the piston block reciprocates in the compression shell, the gas molecules are repeatedly squeezed and dispersed between the wave depressions and wave protrusions, increasing the frequency and intensity of collisions between molecules. This more violent collision further increases the internal energy of the gas, thereby more effectively raising the temperature of the gas.

[0041] Compared with existing gas-assisted heating technology, although gas-assisted heating has a higher calorific value, the installation and maintenance costs of gas equipment are high. It requires laying special gas pipelines, installing gas burners and other equipment, and regular safety inspections and maintenance. This greatly increases the initial investment cost and operating cost of the heating device. The gas compression component does not require these complex and expensive equipment, has low equipment cost, simple installation and maintenance, and reduces the overall cost of the heating system.

[0042] Compared with electric heating, this method of raising the gas temperature through mechanical movement can reduce energy loss. During the electric heating process, there will be a certain amount of energy loss in the process of converting electrical energy into thermal energy. The present invention uses the collision of gas molecules to raise the temperature. The energy conversion process is more direct and efficient, reducing unnecessary energy loss and improving energy utilization efficiency, thereby improving the economy and operation efficiency of the entire heating system. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] Figure 1 It is a front perspective schematic diagram of the main structure of the present invention;

[0044] Figure 2 It is a rear perspective schematic diagram of the main structure of the present invention;

[0045] Figure 3 This is a schematic sectional perspective view of a double helix assembly of the present invention;

[0046] Figure 4 For the present invention Figure 3 A magnified three-dimensional schematic diagram of the structure at center A;

[0047] Figure 5 This is a three-dimensional schematic diagram of the connecting pipe of the present invention;

[0048] Figure 6 For the present invention Figure 5 A magnified three-dimensional diagram of the structure at point B in the middle;

[0049] Figure 7 is a schematic sectional perspective view of a gas compression assembly of the present invention;

[0050] Figure 8 For the present invention Figure 7 An enlarged three-dimensional schematic diagram of the structure at point C in the middle;

[0051] Figure 9 For the present invention Figure 7 The enlarged three-dimensional schematic diagram of the structure at D in the middle;

[0052] Figure 10 For the present invention Figure 7 The enlarged three-dimensional schematic diagram of the structure at E in the middle;

[0053] Figure 11This is a schematic sectional perspective view of the compression shell and piston block of the present invention.

[0054] In the picture:

[0055] 11. Heat pump unit; 12. Boiler body; 13. Connecting pipe;

[0056] 2. Double helix assembly; 21. Inner tube; 22. External thread strip; 23. Internal thread strip; 24. Partition; 25. Air guide cover.

[0057] 3. Gas compression assembly; 31. Compression shell; 32. Reciprocating drive member; 33. Reciprocating motion member; 34. Piston block; 35. Drain hole; 36. One-way valve. DETAILED DESCRIPTION

[0058] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0059] It should be noted that the heat pump unit 11 is an integral device composed of an evaporator, a condenser, a compressor, an expansion valve and other structures. In the present invention, its function is to provide a preheating function for the entire heating system. As a device widely used in the field of heating, the heat pump unit 11 has a universal structure and working principle, and its working mode has been widely known in many heating systems. In view of this, in order to avoid redundancy, its principle will not be elaborated in detail later.

[0060] Similarly, the boiler body 12 in the present invention only provides secondary heating function for the entire heating system. The function of the boiler body 12 in the heating system is relatively simple and clear. Its working principle is based on common fuel combustion or other heating methods to increase the water temperature. This principle is common knowledge in the field of heating technology. Therefore, based on the principle of simplicity, its principle will not be elaborated in the following.

[0061] Example 1, please refer to Figures 1 to 6 As shown, a heat pump and boiler coupled heating device includes a heat pump unit 11 and a boiler body 12. A connecting pipe 13 is installed between the heat pump unit 11 and the boiler body 12. A double helix component 2 is provided inside the connecting pipe 13. The double helix component 2 includes an inner tube 21, an outer thread strip 22, and an inner thread strip 23.

[0062] The inner tube 21 is disposed inside the connecting tube 13 , the external thread 22 is fixedly connected between the connecting tube 13 and the inner tube 21 , and the internal thread 23 is fixedly connected inside the inner tube 21 .

[0063] Please refer to the drawings Figure 3 and Figure 4 As shown in the drawings, the connecting pipe 13 is provided with a flow guide cover 25 near the heat pump unit 11, and the outer surface of the flow guide cover 25 is provided with a baffle 24.

[0064] It should be noted that the outer thread strip 22 gradually expands away from the heat pump unit 11, the inner thread strip 23 gradually shrinks away from the heat pump unit 11, the thread direction of the outer thread strip 22 and the inner thread strip 23 is opposite, the middle part of the flow guide cover 25 is provided with a large hole, the edge of the flow guide cover 25 is provided with small holes arranged at equal intervals in a ring shape, the side of the baffle 24 away from the flow guide cover 25 gradually shrinks inward, the heat pump unit 11 is provided with an input pipe away from the boiler body 12, the input pipe is connected with an external water source, and provides stable water flow input function for the whole heating system, the boiler body 12 is provided with a distribution pipe away from the connecting pipe 13, the distribution pipe provides the function of distributing hot water to each heating area for the heating system, the inner tube 21 is provided with an inner cavity, and the inner tube 21 and the boiler body 12 are provided with an outer cavity.

[0065] Specifically, the operator starts the heat pump unit 11 and starts working, the heat pump unit 11 starts to preheat the water, and the preheated water is transmitted to the boiler body 12 through the connecting pipe 13.

[0066] When the water flows through the connecting pipe 13, it will pass through the flow guide cover 25 and contact the flow guide cover 25, at this time the flow guide cover 25 will divide the fluid into two parts, one part is inside the flow guide cover 25, and the other part is between the flow guide cover 25 and the connecting pipe 13, and the flow guide cover 25 can increase the contact area of the fluid with the surrounding environment, so that the heat exchange is more sufficient.

[0067] Subsequently, the split fluid contacts the baffle 24, and then is dispersed to the inner cavity of the inner tube 21 and the outer cavity between the inner tube 21 and the boiler body 12 by the large hole and the small hole on the surface of the baffle 24.

[0068] In the outer cavity, due to the existence of the outer thread strip 22, and the outer thread strip 22 gradually expands away from the heat pump unit 11, when the fluid flows through this place, the outer thread strip 22 will have a guiding effect on the fluid, so that the fluid forms a spiral fluid.

[0069] Specifically, due to the expansion shape of the external thread strip 22, the fluid will be subjected to an outward component force perpendicular to the flow direction. This component force causes the fluid to move in the circumferential direction, thereby forming a spiral flow. Similarly, in the inner cavity, the internal thread strip 23 gradually shrinks toward the side away from the heat pump unit 11, and the fluid in the inner cavity is guided by the internal thread strip 23 to form a spiral fluid. The formation of the spiral fluid makes the flow path of the fluid in the connecting pipe 13 longer, and the contact time between the fluid and the pipe wall is increased. Whether it is the fluid in the outer cavity and the outer wall of the connecting pipe 13 and the inner pipe 21, or the fluid in the inner cavity and the inner wall of the inner pipe 21, the increase in contact time is conducive to sufficient heat exchange, and the spiral flow makes the fluid "circle" in the pipe, giving it more opportunities to transfer heat with the wall, thereby improving the heat exchange efficiency.

[0070] Secondly, the spiral flow can have a certain scouring effect on the pipe wall. The traditional smooth flow easily causes impurities in the water to deposit on the pipe wall, forming scale over time. The tangential force of the spiral flow can continuously scour the wall, prevent the deposition of impurities, and thus reduce the formation of scale.

[0071] Thirdly, in the traditional transmission process, there is a situation where the local temperature in the pipe is too high or too low, while the spiral flow can fully mix the fluids of different temperatures, making the temperature distribution in the connecting pipe 13 more uniform.

[0072] At the same time, the presence of the external thread strip 22 and the internal thread strip 23 is equivalent to adding a support structure between the connecting pipe 13 and the inner pipe 21. When the fluid flows in the pipeline, especially when thermal expansion and contraction occur due to temperature changes, this support structure can effectively resist the deformation of the pipeline, reduce the risk of damage caused by thermal stress, and thus improve the structural stability of the connecting pipe 13.

[0073] Finally, after the fluid that has gone through the above process reaches the boiler body 12, the boiler body 12 performs secondary heating on the fluid. The temperature of the hot water after secondary heating meets the heating requirements, and then the hot water is distributed to each heating area through the distribution pipe, thereby realizing the heating function of the entire heating system.

[0074] Example 2: Based on Example 1, please refer to Figures 7 to 11As shown, a raised pedestal is installed on the outer surface of the heat pump unit 11, and a gas compression assembly 3 is symmetrically arranged on the top of the raised pedestal. The gas compression assembly 3 includes a compression shell 31 fixedly connected to the top of the raised pedestal, and a reciprocating drive member 32 is installed inside the compression shell 31. A piston block 34 is slidably connected inside the compression shell 31, and a reciprocating member 33 is installed outside the piston block 34. The reciprocating drive member 32 is used to drive the reciprocating member 33 to drive the piston block 34 to move. Two rows of holes 35 are provided on the side where the two compression shells 31 are close to each other, and a one-way valve 36 is installed at each row of holes 35.

[0075] It should be noted that a corrugated depression is provided on the edge of the piston block 34 near the row hole 35, and a corrugated protrusion matching the shape of the corrugated depression is fixedly connected on the inner wall of the compression shell 31 near the row hole 35. The reciprocating drive member 32 includes a motor and a half-gear connecting rod, which is rotatably connected to the interior of the compression shell 31. The motor is mounted on the outer surface of the compression shell 31. The reciprocating member 33 includes a toothed plate and two springs, which are respectively fixed between the compression shell 31 and the piston block 34. The toothed plate is fixedly connected to the outer surface of the piston block 34, and the toothed plate and the half-gear connecting rod are meshed with each other. The one-way valve 36 located above is concentric with the upper row hole 35 and is mounted on the outer surface of the compression shell 31. At the same time, its opening direction is to open on the side away from the lower row hole 35. The one-way valve 36 located below is concentric with the lower row hole 35 and is mounted on the inner surface of the compression shell 31. At the same time, its opening direction is to open on the side close to the upper row hole 35.

[0076] Specifically, in Example 1, when the heat pump unit 11 is started, the operator also needs to start the motor in the reciprocating drive member 32. At this time, the motor drives the half-gear connecting rod to rotate, and the half-gear connecting rod and the gear plate are engaged with each other. As the half-gear connecting rod rotates, the gear plate will be driven to move. Since the gear plate is fixedly connected to the outer surface of the piston block 34, the piston block 34 also moves accordingly.

[0077] During this process, the piston block 34 moves in a direction away from the discharge hole 35. At this time, the spring is compressed. Due to the movement of the piston block 34, the space between the compression shell 31 and the piston block 34 increases. According to the ideal gas state equation, negative pressure will be generated inside the compression shell 31.

[0078] At this time, under the action of the pressure difference, the external air pushes the one-way valve 36 above and enters the compression shell 31 through the upper exhaust hole 35. As the motor continues to run, the half-gear connecting rod continues to rotate. When the half-gear connecting rod is no longer engaged with the gear plate, the compressed spring begins to push the piston block 34 to move in the opposite direction due to the elastic force, that is, to move toward the direction close to the exhaust hole 35. In this process, the piston block 34 will squeeze the air inside the compression shell 31.

[0079] On the one hand, according to the first law of thermodynamics, during this process, the piston block 34 does work on the air, so the internal energy of the air increases, which manifests as an increase in temperature. On the other hand, when the air is compressed, the distance between molecules decreases and the frequency of collisions between molecules increases, which also causes the temperature of the air to increase.

[0080] At the same time, when the piston block 34 moves toward the direction close to the discharge hole 35 to squeeze the air, the corrugated depressions and corrugated protrusions will also cooperate with each other. First of all, this special shape design makes the air not simply compressed evenly during the compression process, but under the guidance of the corrugated shape, the air will form a smaller compression area locally, which is equivalent to compressing the air more strongly in a smaller space, making the collision between air molecules more intense, thereby further increasing the temperature of the air. Secondly, the corrugated shape increases the contact area between the air and the piston block 34 and the wall of the compression shell 31. During the compression process, more air molecules can exchange energy with the wall, which also helps to increase the temperature of the air.

[0081] As the air is continuously compressed, its pressure increases. When the pressure increases to a certain level, the air inside the compression shell 31 pushes the one-way valve 36 located below under the action of the pressure and escapes to the outside through the exhaust hole 35 below.

[0082] At this time, the heated air will be absorbed by the heat pump unit 11. When the heat pump unit 11 is working, it absorbs heat from the environment. This part of the air heated by the gas compression component 3 has a higher temperature. After being absorbed by the heat pump unit 11, it can increase the initial temperature of the ambient air.

[0083] A higher initial temperature means that the heat pump unit 11 can work more efficiently during the preheating process, reducing energy consumption and also improving the heating efficiency of the entire heating system.

[0084] Embodiment 3, a heating method for coupling a heat pump with a boiler, comprises the following steps:

[0085] Step 1: Start the heat pump unit 11 and the gas compression component 3. The gas compression component 3 extracts and compresses ambient air and preheats the ambient air. At the same time, the heat pump unit 11 extracts and compresses the preheated ambient air through the compressor, and uses the refrigerant to absorb heat from the air in the evaporator, and then transfers the heat to the water through the condenser to achieve initial heating;

[0086] Step 2: The water preliminarily heated by the heat pump unit 11 is sent to the boiler body 12 through the double helix component 2;

[0087] Step 3: The boiler body 12 uses natural gas as fuel to secondary heat the water sent from the heat pump unit 11;

[0088] Step 4: The control system will adjust the flow of hot water according to the outdoor temperature and heating demand;

[0089] Step 5: The hot water, after secondary heating by the boiler body 12 and after flow and temperature control, is delivered to the user terminal through a pipeline, and the hot water releases heat to the indoor environment through the radiator at the terminal.

[0090] In step 3, the rated power of the boiler body 12 is 5000KW.

[0091] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article, or device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or elements inherent to such process, method, article, or device. In the absence of further limitations, an element defined by the phrase "comprising a ..." does not exclude the presence of additional identical elements in the process, method, article, or device comprising the element.

[0092] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A heat pump and boiler coupled heating device, comprising a heat pump unit (11) and a boiler body (12), wherein a connecting pipe (13) is installed between the heat pump unit (11) and the boiler body (12), and characterized in that: A double helix component (2) is provided inside the connecting tube (13), and the double helix component (2) comprises an inner tube (21), an outer thread strip (22), and an inner thread strip (23); The inner tube (21) is arranged inside the connecting tube (13), the external thread strip (22) is fixedly connected between the connecting tube (13) and the inner tube (21), and the internal thread strip (23) is fixedly connected inside the inner tube (21); The external thread strip (22) gradually expands toward the side away from the heat pump unit (11), and the internal thread strip (23) gradually contracts toward the side away from the heat pump unit (11); A flow guide cover (25) is installed in the connecting pipe (13) and on a side close to the heat pump unit (11), and a partition (24) is installed on the outer surface of the flow guide cover (25); A large hole is formed through the middle of the partition (24), and small holes are formed through the edge of the partition (24) and are arranged in an annular manner and at equal intervals. The side of the deflector (25) away from the partition (24) gradually shrinks inwards.

2. A heat pump and boiler coupled heating device according to claim 1, characterized in that: The thread directions of the external thread strip (22) and the internal thread strip (23) are opposite.

3. The heat pump and boiler coupled heating device according to claim 1, characterized in that: A raised pedestal is installed on the outer surface of the heat pump unit (11), and a gas compression assembly (3) is symmetrically arranged on the top of the raised pedestal. The gas compression assembly (3) includes a compression shell (31) fixedly connected to the top of the raised pedestal, and a reciprocating drive member (32) is installed inside the compression shell (31). A piston block (34) is slidably connected inside the compression shell (31), and a reciprocating member (33) is installed outside the piston block (34). The reciprocating drive member (32) is used to drive the reciprocating member (33) to drive the piston block (34) to move. Two rows of holes (35) are provided on the side close to each other of the two compression shells (31), and a one-way valve (36) is installed at each row of holes (35).

4. The heat pump and boiler coupled heating device according to claim 3, characterized in that: The piston block (34) has a corrugated depression on its edge near the discharge hole (35), and the compression shell (31) has a corrugated protrusion fixedly connected to its inner wall near the discharge hole (35), the corrugated protrusion matching the shape of the corrugated depression.

5. A heat pump-boiler coupled heating method, applied to a heat pump-boiler coupled heating device as claimed in any one of claims 3 to 4, characterized in that: The following steps are involved: Step 1: Start the heat pump unit (11) and the gas compression component (3), the gas compression component (3) extracts and compresses ambient air, and preheats the ambient air. At the same time, the heat pump unit (11) extracts and compresses the preheated ambient air through the compressor, and uses the refrigerant to absorb heat from the air in the evaporator, and then transfers the heat to the water through the condenser to achieve initial heating; Step 2: The water initially heated by the heat pump unit (11) is fed into the boiler body (12) through the double helix assembly (2); Step 3: The boiler body (12) uses natural gas as fuel to secondary heat the water sent from the heat pump unit (11); Step 4: The control system will adjust the flow of hot water according to the outdoor temperature and heating demand; Step 5: After secondary heating by the boiler body (12) and flow and temperature control, the hot water is transported to the user terminal through a pipeline, and the hot water releases heat to the indoor environment through the radiator at the terminal.

6. The heat supply method of coupling a heat pump with a boiler according to claim 5, characterized in that: In the step 3, the rated power of the boiler body (12) is 5000KW.

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