阅读说明：本技术 一种复合式空气源热泵 (Combined type air source heat pump ) 是由 秦子祥 赵天怡 张炜 于 2021-08-11 设计创作，主要内容包括：本发明公开了一种复合式空气源热泵,包括机壳,所述机壳的左右两侧表面均嵌入安装有翅片蒸发器；所述机壳内部上端位置固定安装有电路板；所述机壳内部中间位置设置有机组体；所述机壳内部下端一侧位置设置有压缩机,且压缩机通过管道与翅片蒸发器连接；所述机壳内部下端另一侧位置设置有热交换器,且热交换器与压缩机通过管道贯通连接；所述热交换器与压缩机之间的管道中间位置设置有管道压强调节机构；所述热交换器的一端固定连接有冷媒回流管道。本发明通过设置管道压强调节机构,避免了在较低气温下,冷媒循环管道内气态冷媒压力过大会容易导致冷媒循环管道爆裂的问题,保证了空气源热泵在低温条件下的正常使用,提高了空气源热泵的通用性。(The invention discloses a composite air source heat pump which comprises a shell, wherein fin evaporators are embedded and installed on the surfaces of the left side and the right side of the shell; a circuit board is fixedly arranged at the upper end inside the shell; an organic assembly is arranged in the middle of the inside of the shell; a compressor is arranged at one side of the lower end in the shell and is connected with the fin evaporator through a pipeline; a heat exchanger is arranged at the other side of the lower end in the shell and is communicated with the compressor through a pipeline; a pipeline pressure adjusting mechanism is arranged in the middle of a pipeline between the heat exchanger and the compressor; one end of the heat exchanger is fixedly connected with a refrigerant return pipeline. By arranging the pipeline pressure adjusting mechanism, the problem that the gaseous refrigerant in the refrigerant circulating pipeline is easy to burst due to overlarge pressure of the gaseous refrigerant at a lower temperature is solved, the normal use of the air source heat pump under a low-temperature condition is ensured, and the universality of the air source heat pump is improved.)

1. A combined type air source heat pump comprises a machine shell (1), and is characterized in that: the edge of the front surface of the shell (1) is hinged with a cabinet door (2); two axial fans (3) are symmetrically arranged in the middle of the upper surface of the casing (1); the fin evaporators (4) are embedded into the surfaces of the left side and the right side of the machine shell (1); a circuit board (5) is fixedly arranged at the upper end position in the shell (1); an organic assembly (6) is arranged in the middle of the interior of the shell (1); a compressor (7) is arranged at one side of the lower end inside the shell (1), and the compressor (7) is connected with the fin evaporator (4) through a pipeline; a heat exchanger (9) is arranged at the other side of the lower end in the machine shell (1), and the heat exchanger (9) is communicated with the compressor (7) through a pipeline; a pipeline pressure regulating mechanism (8) is arranged in the middle of the pipeline between the heat exchanger (9) and the compressor (7); one end of the heat exchanger (9) is fixedly connected with a refrigerant return pipeline (10), the upper end of the pipeline pressure regulating mechanism (8) is communicated with the refrigerant return pipeline (10), and one end of the refrigerant return pipeline (10) is communicated with the fin evaporator (4);

the pipeline pressure adjusting mechanism (8) comprises a shell (81), an air inlet (82), an air outlet (83), a squeezing mechanism (84), a first annular magnet (86), an air spring (87), a second annular magnet (88), a condensation pipe (89) and a pressure relief return pipe (810); an air inlet (82) is formed in one end of the shell (81), and one end of the air inlet (82) is fixedly connected with the compressor (7) through a pipeline; an air outlet (83) is formed in one side of the lower end of the outer circular surface of the shell (81), and one end of the air outlet (83) is fixedly connected with the heat exchanger (9) through a pipeline; one side of the upper end of the outer circular surface of the shell (81) is communicated with a pressure relief return pipe (810); the outer circular surface of the pressure relief return pipe (810) is connected with the condensing pipe (89) in a penetrating manner, and one end of the pressure relief return pipe (810) extends out of the condensing pipe (89) and is connected with the refrigerant return pipeline (10) in a penetrating manner; a second annular magnet (88) is fixedly arranged in the middle of one side of the inner surface of the shell (81); an air spring (87) is fixedly installed at the inner position, close to the second annular magnet (88), of one side of the inner surface of the shell (81), and one end of the air spring (87) is fixedly connected with the extrusion mechanism (84); one side of the outer surface of the extrusion mechanism (84) is close to the outer position of the extrusion mechanism (84) and is fixedly connected with a first annular magnet (86), and the first annular magnet (86) and a second annular magnet (88) are correspondingly arranged.

2. The composite air source heat pump of claim 1, wherein: the extrusion mechanism (84) comprises a rubber piston sleeve (841), an expandable graphite ring (842), a mounting groove (843) and a connecting plate (844); the middle position of one side of the outer surface of the connecting plate (844) is fixedly connected with an air spring (87); an installation groove (843) is embedded in the middle of one side of the outer surface of the rubber piston sleeve (841); the inner surface of the mounting groove (843) is fixedly connected with an expandable graphite ring (842), and the connecting plate (844) is placed inside the mounting groove (843) and is in interference fit with the rubber piston sleeve (841) by means of the expandable graphite ring (842).

3. The composite air source heat pump of claim 2, wherein: two dismounting grooves (845) are symmetrically formed in the outer circular surface of the connecting plate (844); a prying groove (847) is embedded in the middle of one side of the inner surface of the dismounting groove (845).

4. The composite air source heat pump of claim 2, wherein: the outer circle surface of the rubber piston sleeve (841) is uniformly provided with four limit strips (846) in an annular shape, and the outer surfaces of the limit strips (846) are all connected with lubricating films (848) in an adhering manner; the position of the inner circular surface of the shell (81) corresponding to the limiting strips (846) is annular and is uniformly provided with four limiting grooves (849), and the limiting strips (846) and the limiting grooves (849) are matched with each other to realize circumferential limiting of the extrusion mechanism (84).

5. The composite air source heat pump of claim 2, wherein: a metal conductive plate (811) is fixedly arranged at one side of the outer surface of the connecting plate (844) close to the outer side of the air spring (87); an electrode plate switch (812) is fixedly installed at the outer side position, close to the air spring (87), of one side of the inner surface of the shell (81), and the electrode plate switch (812) is arranged corresponding to the metal conductive plate (811); a buzzer (813) is fixedly arranged on one side of the outer surface of the shell (81) close to the middle position.

6. The composite air source heat pump of claim 1, wherein: when the first annular magnet (86) and the second annular magnet (88) are attached, the length of a cavity formed is larger than the length value of the air spring (87) in the maximum compression state, and the magnetic force when the first annular magnet (86) and the second annular magnet (88) are mutually attracted is larger than the elastic force of the air spring (87) in the maximum compression state.

Technical Field

The invention relates to the technical field of air source heat pumps, in particular to a combined type air source heat pump.

Background

An air source heat pump is an energy-saving device which utilizes high-level energy to enable heat to flow from low-level heat source air to a high-level heat source, is a form of heat pump, and as the name suggests, the heat pump is just like a pump, and can convert low-level heat energy (such as heat contained in air, soil and water) which cannot be directly utilized into high-level heat energy which can be utilized, thereby achieving the purpose of saving part of high-level energy (such as coal, gas, oil, electric energy and the like).

The method is characterized in that the method is recorded in 'failure analysis and solution of air source heat pump hot water unit' written by Chenyuguan institute of southeast university: the refrigerant circulating pipeline bursts, the refrigerant is lost, and the whole machine is paralyzed, and shows that after the continuous work or the starting for a period of time, the noise of the outdoor main machine is increased, a crack appears on a local refrigerant circulating return pipe, the refrigerant is leaked, and the pressure test is zero; the refrigerant medium circulation pipeline bursts, the main reason for the complete leakage of the refrigerant is that the pressure of the circulation system is increased and exceeds the pressure-bearing range of the refrigerant circulation pipeline, the same amount of heat is produced due to the change of the cold in the weather, the work of a compressor is increased, the pressure of a phase change critical point of the refrigerant is increased, and the refrigerant leaks due to the fact that the copper part is insufficient in thickness or unqualified in welding and bursts.

According to the analysis recorded in the existing literature, under the condition of low air temperature, when the air source heat pump produces the same heat, the work of the compressor is increased, the pressure of the phase change critical point of the refrigerant is increased, the pressure of a circulating system is increased and exceeds the pressure bearing range of a refrigerant circulating pipeline, the refrigerant circulating pipeline is exploded due to insufficient thickness of copper pieces or unqualified welding, the refrigerant is leaked, once the refrigerant of the circulating pipeline is leaked, the compressor cannot work, the whole air source heat pump is paralyzed, and in addition, when the pipe of the refrigerant circulating pipeline is partially exploded, water permeates into the refrigerant circulating pipeline and then the compressor is easily damaged.

Therefore, a compound air source heat pump is provided.

Disclosure of Invention

The present invention is directed to a hybrid air source heat pump, so as to solve the problems mentioned in the background art.

In order to achieve the purpose, the invention provides the following technical scheme: a combined type air source heat pump comprises a machine shell, wherein a cabinet door is hinged to the edge of the front surface of the machine shell; two axial fans are symmetrically arranged in the middle of the upper surface of the shell; the fin evaporators are embedded in the surfaces of the left side and the right side of the shell; a circuit board is fixedly arranged at the upper end inside the shell; an organic assembly is arranged in the middle of the inside of the shell; a compressor is arranged at one side of the lower end in the shell and is connected with the fin evaporator through a pipeline; a heat exchanger is arranged at the other side of the lower end in the shell and is communicated with the compressor through a pipeline; a pipeline pressure adjusting mechanism is arranged in the middle of a pipeline between the heat exchanger and the compressor; one end of the heat exchanger is fixedly connected with a refrigerant return pipeline, the upper end of the pipeline pressure regulating mechanism is communicated with the refrigerant return pipeline, and one end of the refrigerant return pipeline is communicated with the fin evaporator;

the pipeline pressure adjusting mechanism comprises a shell, an air inlet, an air outlet, an extrusion mechanism, a first annular magnet, an air spring, a second annular magnet, a condenser pipe and a pressure relief return pipe; one end of the shell is provided with an air inlet, and one end of the air inlet is fixedly connected with the compressor through a pipeline; an air outlet is formed in one side of the lower end of the outer circular surface of the shell, and one end of the air outlet is fixedly connected with the heat exchanger through a pipeline; one side of the upper end of the outer circular surface of the shell is communicated with a pressure relief return pipe; the outer circular surface of the pressure relief backflow pipe is connected with the condenser pipe in a penetrating mode, and one end of the pressure relief backflow pipe extends out of the condenser pipe and is connected with the refrigerant backflow pipeline in a penetrating mode; a second annular magnet is fixedly arranged in the middle of one side of the inner surface of the shell; an air spring is fixedly arranged at one side of the inner surface of the shell and close to the inner position of the second annular magnet, and one end of the air spring is fixedly connected with the extrusion mechanism; and one side of the outer surface of the extrusion mechanism is fixedly connected with a first annular magnet at an external position close to the extrusion mechanism, and the first annular magnet and the second annular magnet are correspondingly arranged.

Under the condition of lower air temperature, when the air source heat pump produces the same heat, the work of the compressor is increased, the phase change critical point pressure of the refrigerant is increased, the pressure of a circulating system is increased and exceeds the pressure bearing range of a refrigerant circulating pipeline, the refrigerant circulating pipeline is exploded due to insufficient copper part thickness or unqualified welding to cause the leakage of the refrigerant, once the refrigerant of the circulating pipeline leaks, the compressor cannot work to cause the complete machine paralysis of the air source heat pump, in addition, when part of the refrigerant circulating pipeline is exploded, water permeates into the refrigerant circulating pipeline to easily cause the damage of the compressor, the invention arranges a pipeline pressure regulating mechanism at the middle position of the pipeline between the heat exchanger and the compressor, the high-temperature high-pressure gaseous refrigerant output by the compressor firstly enters the shell through an air inlet and then enters the heat exchanger through an air outlet, the work of the compressor is increased, and the phase change efficiency of the refrigerant is unchanged, when the pressure of the pipeline gas between the heat exchanger and the compressor is increased, the extrusion mechanism is pushed to move towards the direction far away from the air inlet under the action of the pressure of the gaseous refrigerant, so that the air spring is compressed, when the extrusion mechanism is pushed to the pressure relief return pipe by the air pressure, the pressure of the gaseous refrigerant in the refrigerant circulating pipeline reaches the maximum preset pressure value of the refrigerant circulating pipeline at the moment, the pressure is continuously increased, the refrigerant circulating pipeline is easy to burst, therefore, the extrusion mechanism moves to one side of the pressure relief return pipe, the gaseous refrigerant is subjected to pressure relief from the pressure relief return pipe under the action of the pressure after the pressure relief return pipe is communicated with the inside of one end of the shell with the gaseous refrigerant, the condensing pipe is sleeved outside the pressure relief return pipe, the gaseous refrigerant performs heat exchange with the condensing pipe to cool the gaseous refrigerant, and the cooled liquid refrigerant flows back to the fin evaporator through the return pipe, the next round of work is carried out, so that the problem that the refrigerant circulating pipeline is easy to burst due to the fact that the pressure of gaseous refrigerants in the refrigerant circulating pipeline is too high at a low gas temperature is avoided, when the extrusion mechanism moves to one side of the pressure relief backflow pipe, the magnetic field attraction of the first annular magnet and the magnetic field attraction of the second annular magnet are mutually captured, the first annular magnet and the second annular magnet are mutually adsorbed by the magnetic field attraction, the extrusion mechanism is fixed, the pressure relief backflow pipe is always communicated with the inside of one end of the shell, where the gaseous refrigerants exist, the problem that the pressure relief backflow pipe is separated from the shell due to the fact that the extrusion mechanism resets under the elastic force of the air spring after the gaseous refrigerants are decompressed is avoided, and the pressure relief backflow pipe is re-pressurized in the shell is caused, and therefore the problem that the pressure of the phase change critical point of the refrigerants is increased at the low gas temperature and the refrigerant circulating pipeline is exploded due to insufficient thickness of copper parts or unqualified welding is solved, the problem of refrigerant leakage is caused, the normal use of the air source heat pump under the low-temperature condition is ensured, and the universality of the air source heat pump is improved.

Preferably, the extrusion mechanism comprises a rubber piston sleeve, an expandable graphite ring, a mounting groove and a connecting plate; the middle position of one side of the outer surface of the connecting plate is fixedly connected with the air spring; the middle position of one side of the outer surface of the rubber piston sleeve is embedded with and provided with an installation groove; the inner surface of the mounting groove is fixedly connected with the expandable graphite ring, and the connecting plate is placed inside the mounting groove and is in interference fit with the rubber piston sleeve by utilizing the expandable graphite ring.

When the pipeline pressure adjusting mechanism works, the extruding mechanism is usually made of rubber materials to ensure sufficient tightness, the rubber piston sleeve made of rubber materials is usually connected with the connecting plate made of metal materials by using bonding glue, gaseous refrigerant output by the compressor is high-temperature high-pressure gas, the temperature of the gaseous refrigerant can reach 100 ℃, the aging speed of the bonding glue is accelerated at the temperature, the service life of the extruding mechanism is shortened, and after the bonding glue is aged, the rubber piston sleeve and the connecting plate are easy to fall off to cause the failure of the pipeline pressure adjusting mechanism. Realized being connected fixedly between the rubber piston sleeve of rubber material and the connecting plate of metal material, compared in traditional glue and connected, can prolong extrusion mechanism's life, and guaranteed pipeline pressure adjustment mechanism's normal work.

Preferably, two dismounting grooves are symmetrically formed in the outer circular surface of the connecting plate; and a prying groove is embedded in the middle position of one side of the inner surface of the dismounting groove.

When the rubber piston sleeve needs to be replaced, a prying bar can be used for stretching into the dismounting groove to abut against the prying groove to match with the connecting plate to dismount the rubber piston sleeve, and then the rubber piston sleeve is dismounted, so that the rubber piston sleeve is dismounted and replaced.

Preferably, four limiting strips are uniformly arranged on the outer circle surface of the rubber piston sleeve in an annular manner, and lubricating films are connected to the outer surfaces of the limiting strips in an adhering manner; the position of the inner circular surface of the shell corresponding to the limiting strips is annular and is evenly provided with four limiting grooves, and the limiting strips and the limiting grooves are matched with each other to realize circumferential limiting of the extrusion mechanism.

When in work, the extrusion mechanism is pushed in the direction far away from the air inlet under the pressure of the gaseous refrigerant, in the moving process, the circumferential direction of the extrusion mechanism is not limited, when the external vibration is large or the gaseous refrigerant is unstable in output, the extrusion mechanism will shake to cause the air tightness in the shell to be poor, the gaseous refrigerant is discharged from the crack leaked when the extrusion mechanism inclines through the pressure relief return pipe, thereby influencing the operating efficiency of the device, the invention can realize the circumferential fixation of the extrusion mechanism by arranging the limit strip to be matched with the limit groove, ensures that the extrusion mechanism is always vertical to the inner circular surface of the shell, thereby ensuring the integral air tightness, simultaneously reducing the friction between the limiting strip and the limiting groove by arranging the lubricating film, therefore, the extrusion mechanism moves more smoothly, the friction loss is reduced, and the service life of the device is prolonged.

Preferably, a metal conductive plate is fixedly arranged at one side of the outer surface of the connecting plate, which is close to the outer side of the air spring; an electrode plate switch is fixedly installed at one side of the inner surface of the shell, close to the outer side of the air spring, and the electrode plate switch is arranged corresponding to the metal conductive plate; and a buzzer is fixedly arranged on one side of the outer surface of the shell close to the middle position.

When the pipeline pressure adjusting mechanism works, after the first annular magnet and the second annular magnet are mutually adsorbed and fixed, the pressure relief backflow pipe is always communicated with the inside of one end, in which gaseous refrigerant exists, of the shell, so that the amount of the gaseous refrigerant entering the heat exchanger is reduced, the heat exchange efficiency of the heat exchanger is reduced, and the overall heating efficiency of the air source heat pump is further influenced.

Preferably, the length of the cavity formed when the first annular magnet and the second annular magnet are attached is larger than the length value of the air spring in the maximum compression state, and the magnetic force when the first annular magnet and the second annular magnet are mutually attracted is larger than the elastic force of the air spring in the maximum compression state.

During operation, after the first annular magnet and the second annular magnet are mutually adsorbed and fixed, the air spring is in a complete compression state and is arranged inside a cavity formed when the first annular magnet and the second annular magnet are attached, and meanwhile, the elastic force of the air spring at the moment is ensured to be smaller than the magnetic force generated when the first annular magnet and the second annular magnet are mutually adsorbed, so that the magnetic connection between the first annular magnet and the second annular magnet can not be bounced off by the air spring, and the normal work of the extrusion mechanism is further ensured.

Compared with the prior art, the invention has the beneficial effects that:

the invention avoids the problem that the refrigerant circulating pipeline is easy to burst due to overlarge pressure of the gaseous refrigerant in the refrigerant circulating pipeline at lower gas temperature by arranging the pipeline pressure regulating mechanism at the middle position of the pipeline between the heat exchanger and the compressor, and when the extrusion mechanism moves to one side of the pressure relief return pipe, the magnetic field attraction of the first annular magnet and the second annular magnet is mutually captured, the first annular magnet and the second annular magnet are mutually adsorbed by the magnetic field attraction, so that the extrusion mechanism is fixed, the pressure relief return pipe is always in a communicated state with the inside of one end of the shell, which is provided with the gaseous refrigerant, the extrusion mechanism is prevented from resetting under the action of the elastic force of the air spring after the pressure of the gaseous refrigerant is relieved, the pressure relief return pipe is separated from the shell, and the problem of pressure re-accumulation in the shell is solved, thereby the problem that the pressure of the phase change critical point of the refrigerant is increased at lower gas temperature is solved, the refrigerant circulating pipeline is exploded due to insufficient thickness of copper pieces or unqualified welding, so that the problem of refrigerant leakage is caused, the normal use of the air source heat pump under the low-temperature condition is ensured, and the universality of the air source heat pump is improved.

Drawings

FIG. 1 is a schematic view of the overall structure of the present invention;

FIG. 2 is a cross-sectional structural view of the present invention;

FIG. 3 is a partial cross-sectional structural view of the pipe pressure regulating mechanism of the present invention;

FIG. 4 is a structural view of the pressing mechanism of the present invention;

FIG. 5 is a front structural view of the connection plate of the present invention;

FIG. 6 is a cross-sectional view taken along line A-A of FIG. 7 in accordance with the present invention;

fig. 7 is an enlarged structural view taken at a in fig. 2 of the present invention.

In the figure: 1. a housing; 2. a cabinet door; 3. an axial flow fan; 4. a finned evaporator; 5. a circuit board; 6. a machine assembly body; 7. a compressor; 8. a pipeline pressure intensity adjusting mechanism; 81. a housing; 82. an air inlet; 83. an air outlet; 84. an extrusion mechanism; 841. a rubber piston sleeve; 842. an expandable graphite ring; 843. mounting grooves; 844. a connecting plate; 845. disassembling the groove; 846. a limiting strip; 847. prying the groove; 848. lubricating the film; 849. a limiting groove; 86. a first ring magnet; 87. an air spring; 88. a second annular magnet; 89. a condenser tube; 810. a pressure relief return pipe; 811. a metal conductive plate; 812. an electrode plate switch; 813. a buzzer; 9. a heat exchanger; 10. refrigerant return line.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like, indicate orientations and positional relationships based on those shown in the drawings, and are used only for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be considered as limiting the present invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first", "second", may explicitly or implicitly include one or more of the described features. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise. Furthermore, the terms "mounted," "connected," and "connected" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Referring to fig. 1 to 7, the present invention provides a technical solution of a composite air source heat pump:

a combined type air source heat pump is shown in figures 1 to 3 and comprises a machine shell 1, wherein a cabinet door 2 is hinged to the edge position of the front surface of the machine shell 1; two axial fans 3 are symmetrically arranged in the middle of the upper surface of the casing 1; the finned evaporators 4 are embedded in the surfaces of the left side and the right side of the machine shell 1; a circuit board 5 is fixedly arranged at the upper end position in the shell 1; an organic assembly 6 is arranged in the middle of the inside of the shell 1; a compressor 7 is arranged at one side of the lower end inside the machine shell 1, and the compressor 7 is connected with the finned evaporator 4 through a pipeline; a heat exchanger 9 is arranged at the other side of the lower end in the machine shell 1, and the heat exchanger 9 is communicated with the compressor 7 through a pipeline; a pipeline pressure regulating mechanism 8 is arranged in the middle of the pipeline between the heat exchanger 9 and the compressor 7; one end of the heat exchanger 9 is fixedly connected with a refrigerant return pipeline 10, the upper end of the pipeline pressure adjusting mechanism 8 is communicated with the refrigerant return pipeline 10, and one end of the refrigerant return pipeline 10 is communicated with the fin evaporator 4;

the pipeline pressure adjusting mechanism 8 comprises a shell 81, an air inlet 82, an air outlet 83, a squeezing mechanism 84, a first annular magnet 86, an air spring 87, a second annular magnet 88, a condensation pipe 89 and a pressure relief return pipe 810; an air inlet 82 is formed in one end of the shell 81, and one end of the air inlet 82 is fixedly connected with the compressor 7 through a pipeline; an air outlet 83 is formed in one side of the lower end of the outer circular surface of the shell 81, and one end of the air outlet 83 is fixedly connected with the heat exchanger 9 through a pipeline; a pressure relief return pipe 810 is connected to one side of the upper end of the outer circular surface of the housing 81 in a penetrating manner; the outer circular surface of the pressure relief return pipe 810 is connected with the condenser pipe 89 in a penetrating manner, and one end of the pressure relief return pipe 810 extends out of the condenser pipe 89 and is connected with the refrigerant return pipeline 10 in a penetrating manner; a second annular magnet 88 is fixedly arranged in the middle of one side of the inner surface of the shell 81; an air spring 87 is fixedly arranged at one side of the inner surface of the shell 81 close to the inner position of the second annular magnet 88, and one end of the air spring 87 is fixedly connected with the extrusion mechanism 84; the outer surface side of the squeezing mechanism 84 is fixedly connected with a first annular magnet 86 at a position close to the outside of the squeezing mechanism 84, and the first annular magnet 86 and a second annular magnet 88 are correspondingly arranged.

Under the condition of lower air temperature, when the air source heat pump produces the same heat, the work of the compressor 7 is increased, the pressure of a phase change critical point of a refrigerant is increased, the pressure of a circulating system is increased and exceeds the pressure bearing range of a refrigerant circulating pipeline, the refrigerant circulating pipeline is exploded due to insufficient copper part thickness or unqualified welding to cause the leakage of the refrigerant, once the refrigerant of the circulating pipeline leaks, the compressor 7 cannot work to cause the complete machine paralysis of the air source heat pump, in addition, when the refrigerant circulating pipeline is partially exploded, water permeates into the refrigerant circulating pipeline to easily cause the damage of the compressor 7, the invention arranges a pipeline pressure regulating mechanism 8 at the middle position of the pipeline between the heat exchanger 9 and the compressor 7, high-temperature and high-pressure gaseous refrigerant output by the compressor 7 firstly enters the shell 81 through the air inlet 82 and then enters the heat exchanger 9 through the air outlet 83, when the compressor 7 applies more work and the phase change efficiency of the refrigerant is not changed, which causes the pressure of the gas in the pipe between the heat exchanger 9 and the compressor 7 to increase, the pressing mechanism 84 is pushed to move in the direction away from the air inlet 82 under the pressure of the gaseous refrigerant, so that the air spring 87 is compressed, when the pressing mechanism 84 is pushed to the pressure relief return pipe 810 by the air pressure, the pressure of the gaseous refrigerant in the refrigerant circulation pipe reaches the maximum preset pressure value of the refrigerant circulation pipe, the pressure is increased continuously, which easily causes the refrigerant circulation pipe to burst, so that the pressing mechanism 84 moves to one side of the pressure relief return pipe 810, after the pressure relief return pipe 810 is communicated with the inside of the end of the housing 81 where the gaseous refrigerant exists, the gaseous refrigerant is relieved from the pressure relief return pipe 810 under the pressure, the condenser pipe 89 is sleeved outside the pressure relief return pipe 810, and the gaseous refrigerant utilizes the condensation function of the condenser pipe 89 in the condenser pipe 89, the refrigerant is cooled to be liquid refrigerant and flows back to the fin evaporator 4 through the refrigerant return pipe 10 to perform the next round of operation, thereby avoiding the problem that the refrigerant circulation pipe is easy to burst due to the overlarge pressure of the gaseous refrigerant in the refrigerant circulation pipe at a lower temperature, and when the extruding mechanism 84 moves to one side of the pressure relief return pipe 810, the magnetic field attraction of the first annular magnet 86 and the second annular magnet 88 is mutually captured, the first annular magnet 86 and the second annular magnet 88 are mutually adsorbed by the magnetic field attraction, so that the extruding mechanism 84 is fixed, and the pressure relief return pipe 810 is always in a communication state with the inside of one end of the shell 81 where the gaseous refrigerant is stored, thereby avoiding the problem that the extruding mechanism 84 resets under the elastic force of the air spring 87 after the pressure of the gaseous refrigerant is relieved, so that the pressure relief return pipe 810 is separated from the shell 81, and the pressure in the shell 81 is accumulated again, therefore, the problem that the refrigerant leaks due to the fact that the refrigerant circulating pipeline is exploded due to insufficient thickness of copper pieces or unqualified welding when the pressure of the phase change critical point of the refrigerant is increased at a low temperature is solved, normal use of the air source heat pump under the low-temperature condition is guaranteed, and the universality of the air source heat pump is improved.

As an embodiment of the present invention, as shown in fig. 4, the pressing mechanism 84 includes a rubber piston sleeve 841, an expandable graphite ring 842, a mounting groove 843, and a connecting plate 844; the middle position of one side of the outer surface of the connecting plate 844 is fixedly connected with the air spring 87; the middle position of one side of the outer surface of the rubber piston sleeve 841 is embedded with an installation groove 843; the inner surface of the mounting groove 843 is fixedly connected with an expandable graphite ring 842, and the connecting plate 844 is placed inside the mounting groove 843 and is in interference fit with the rubber piston sleeve 841 by means of the expandable graphite ring 842; when the pipeline pressure adjusting mechanism 8 works, the expandable graphite ring 842 is in clearance fit with the connecting plate 844 when being installed through the expandable graphite ring 842, when the expandable graphite ring 842 is used, after being heated by the gaseous refrigerant at the high temperature and the high pressure of 100 ℃, the volume begins to expand to tightly press the connecting plate 844, and the expandable graphite ring 842 is further matched with the connecting plate 844 to be converted into interference fit, realized being connected fixedly between the rubber piston cover 841 of rubber material and the connecting plate 844 of metal material, compared and being connected in traditional glue, can prolong the life of extrusion mechanism 84, and guaranteed the normal work of pipeline pressure adjustment mechanism 8.

As an embodiment of the present invention, as shown in fig. 5, two detaching grooves 845 are symmetrically formed on an outer circumferential surface of the connecting plate 844; a prying groove 847 is embedded in the middle of one side of the inner surface of the dismounting groove 845; in the working process, the extruding mechanism 84 utilizes the expandable graphite ring 842 to realize the connection and fixation between the rubber piston sleeve 841 made of rubber and the connecting plate 844 made of metal, but after the rubber piston sleeve 841 is used for a long time, the connection tightness between the rubber piston sleeve 841 and the inner wall of the shell 81 is reduced due to friction loss, so that the integral air tightness cannot be ensured, and at the moment, the rubber piston sleeve 841 needs to be replaced.

As an embodiment of the present invention, as shown in fig. 6, four limiting strips 846 are uniformly installed on the outer circumferential surface of the rubber piston sleeve 841 in an annular shape, and lubricating films 848 are bonded to the outer surfaces of the limiting strips 846; four limiting grooves 849 are uniformly formed in the position, corresponding to the limiting strip 846, of the inner circular surface of the shell 81 in an annular shape, and the limiting strip 846 and the limiting grooves 849 are matched with each other to realize circumferential limiting of the extrusion mechanism 84; when the device works, the extrusion mechanism 84 is pushed in the direction far away from the air inlet 82 under the pressure action of the gaseous refrigerant, the extrusion mechanism 84 is not limited in the circumferential direction in the moving process, when the external vibration is large or the output of the gaseous refrigerant is unstable, the extrusion mechanism 84 shakes to cause the air tightness in the shell 81 to be poor, the gaseous refrigerant is discharged from a crack leaked when the extrusion mechanism 84 inclines through the pressure relief return pipe 810, and further the operation efficiency of the device is influenced, the invention can realize the circumferential fixation of the extrusion mechanism 84 by arranging the limiting strip 846 to be matched with the limiting groove 849, ensures that the extrusion mechanism 84 is always vertical to the inner circular surface of the shell 81, further ensures the integral air tightness, and simultaneously can reduce the friction between the limiting strip 846 and the limiting groove 849 by arranging the lubricating film 848, further enables the extrusion mechanism 84 to move more smoothly, and simultaneously reduces the friction loss, the service life of the device is prolonged.

As an embodiment of the present invention, as shown in fig. 7, a metal conductive plate 811 is fixedly mounted on one side of the outer surface of the connecting plate 844 at a position close to the outer side of the air spring 87; an electrode plate switch 812 is fixedly mounted at the outer side position of one side of the inner surface of the shell 81 close to the air spring 87, and the electrode plate switch 812 is arranged corresponding to the metal conductive plate 811; a buzzer 813 is fixedly arranged on one side of the outer surface of the shell 81 close to the middle position; when the pipeline pressure adjusting mechanism 8 works, after the first annular magnet 86 and the second annular magnet 88 are mutually adsorbed and fixed, because the pressure relief return pipe 810 is always communicated with the inside of one end of the shell 81 where gaseous refrigerant exists, the amount of the gaseous refrigerant entering the heat exchanger 9 is reduced, the heat exchange efficiency of the heat exchanger 9 is reduced, and the overall heating efficiency of the air source heat pump is further influenced.

As an embodiment of the present invention, as shown in fig. 7, when the first annular magnet 86 and the second annular magnet 88 are attached to each other, the length of the cavity formed is greater than the length of the air spring 87 in the maximum compressed state, and the magnetic force when the first annular magnet 86 and the second annular magnet 88 are attracted to each other is greater than the elastic force when the air spring 87 is in the maximum compressed state; during operation, after the first annular magnet 86 and the second annular magnet 88 are mutually adsorbed and fixed, the air spring 87 is in a completely compressed state and is arranged in the cavity formed when the first annular magnet 86 and the second annular magnet 88 are attached, and meanwhile, the elastic force of the air spring 87 at the moment is ensured to be smaller than the magnetic force generated when the first annular magnet 86 and the second annular magnet 88 are mutually adsorbed, so that the magnetic connection between the first annular magnet 86 and the second annular magnet 88 can be ensured not to be bounced by the air spring 87, and the normal operation of the extrusion mechanism 84 is further ensured.

The using method comprises the following steps: when the invention is used, after the power is switched on, the axial flow fan 3 starts to run, outdoor air carries out heat exchange through the fin evaporator 4, the air with reduced temperature is discharged out of the system by the fan, meanwhile, liquid cold medium in the fin evaporator 4 absorbs heat and is vaporized and sucked into the compressor 7, high-temperature and high-pressure gaseous refrigerant output by the compressor 7 firstly enters the shell 81 through the air inlet 82 and then enters the heat exchanger 9 through the air outlet 83, when the air temperature is lower, the work done by the compressor 7 is increased, the phase change efficiency of the refrigerant is unchanged, so that the pipeline gas pressure between the heat exchanger 9 and the compressor 7 is increased, under the action of the pressure of the gaseous refrigerant, the extrusion mechanism 84 is pushed to move in the direction far away from the air inlet 82, so that the air spring 87 is compressed, when the extrusion mechanism 84 is pushed to the backflow pipe 810 by air pressure, at the moment, the pressure of the gaseous refrigerant in the refrigerant circulating pipeline reaches the maximum pressure value of the refrigerant circulating pipeline, when the pressure is increased continuously, the refrigerant circulation pipeline is prone to burst, so that the extrusion mechanism 84 moves to one side of the pressure relief return pipe 810, after the pressure relief return pipe 810 is communicated with the inside of one end of the shell 81, where the gaseous refrigerant is stored, pressure is relieved from the pressure relief return pipe 810 under the pressure effect, the condensing pipe 89 is sleeved outside the pressure relief return pipe 810, the gaseous refrigerant is subjected to heat exchange with the condensing pipe 89 in the condensing pipe 89 by utilizing the condensing effect of the condensing pipe 89 to be cooled into the liquid refrigerant, the liquid refrigerant flows back to the fin evaporator 4 through the refrigerant return pipe 10 to perform the next round of work, the problem that the refrigerant circulation pipeline is prone to burst due to the fact that the gaseous refrigerant in the refrigerant circulation pipeline is over-pressurized at a low air temperature is solved, and when the extrusion mechanism 84 moves to one side of the pressure relief return pipe 810, the first annular magnet 86 and the second annular magnet 88 capture each other by magnetic field attraction force, the first annular magnet 86 and the second annular magnet 88 are mutually adsorbed by utilizing the magnetic field attraction force, so that the extrusion mechanism 84 is fixed, the pressure relief return pipe 810 is always communicated with the inside of one end of the shell 81, which is provided with the gaseous refrigerant, the problem that the pressure of the inside of the shell 81 is accumulated again due to the fact that the extrusion mechanism 84 resets under the elastic force of the air spring 87 after the gaseous refrigerant is relieved is solved, the problem that the pressure of the phase change critical point of the refrigerant is increased at a lower gas temperature, the refrigerant circulation pipeline is exploded due to insufficient thickness of a copper piece or unqualified welding, the refrigerant is leaked is solved, the normal use of the air source heat pump under the low temperature condition is ensured, the universality of the air source heat pump is improved, the compressor 7 compresses low-pressure refrigerant gas into high-temperature high-pressure gas and sends the high-temperature high-pressure gas into the heat exchanger 9 through the pipeline pressure regulating mechanism 8, the cold water forced to circulate by the water pump passes through the heat exchanger 9 to exchange heat with the high-temperature high-pressure gas and then is sent to the user, and the high-temperature high-pressure gaseous refrigerant is cooled into liquid and flows into the fin evaporator 4 again to perform repeated circulation work after expansion, throttling and temperature reduction.

The electric elements in the document are electrically connected with an external main controller and 220V mains supply through a transformer, the main controller can be a conventional known device controlled by a computer and the like, the product model provided by the invention is only used according to the structural characteristics of the product, the product can be adjusted and modified after being purchased, so that the product is more matched with and accords with the technical scheme of the invention, the product model is a technical scheme of the optimal application of the technical scheme, the product model can be replaced and modified according to the required technical parameters, and the product model is familiar to the technical personnel in the field, so that the technical scheme provided by the invention can clearly obtain the corresponding use effect.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.