Bidirectional throttling pipeline for heat pump air conditioning system

Abstract

The utility model relates to the technical field of heat pump air conditioners, and discloses a bidirectional throttling pipeline for a heat pump air conditioning system, which comprises a centrifugal fan, an evaporator component, an axial flow fan and a copper pipe. And in the refrigeration mode, after absorbing indoor heat through the evaporator, the refrigerant enters the compressor through the four-way reversing valve to be compressed and then is cooled through the condenser assembly, and indoor cooling is efficiently achieved through such circulation. In the heating mode, the four-way reversing valve is switched, the flow direction of a refrigerant is changed, heat is transferred from the outdoor to the indoor, the heating requirement of a user is met, and the high-pressure gauge and the low-pressure gauge arranged in the pipeline can accurately monitor the high-pressure state and the low-pressure state in the system in real time. The high-pressure switch and the low-pressure switch are matched, when the system pressure exceeds the normal working range, the switches can act rapidly, a circuit is cut off in time, a compressor and other key components are protected against damage of too high or too low pressure, the stability and safety of system operation are greatly improved, and the service life of equipment is prolonged.

Description

TECHNICAL FIELD

[0001] The utility model relates to heat pump air conditioning technical field, concretely is a kind of bidirectional throttling pipeline for heat pump air conditioning system. BACKGROUND

[0002] In modern society, the function of air conditioner has evolved from simply meeting the cooling demand in early stage to accurately adjusting indoor temperature, realizing the dual function of refrigeration and heating. Especially in the aspect of heating, its application scope has far exceeded the basic demand of creating comfortable environment for human. In many special industrial occasions, the production, processing and storage of products require extremely strict environmental adaptability. For example, in the electronic chip manufacturing workshop, the high-precision chip production process needs to accurately control the environmental temperature in a specific range to ensure the performance and quality of chip; in the pharmaceutical industry, the stability of the research and development, production and storage environment temperature of medicine is directly related to the safety and effectiveness of medicine.

[0003] However, in these industrial scenarios, due to the relatively small area of indoor heat exchanger compared with the area of outdoor heat exchanger, the system is prone to high pressure alarm and shutdown during heating operation. This is because in heating mode, the indoor heat exchanger takes the role of condenser, and the small area makes the heat dissipation insufficient during the condensation process of refrigerant, resulting in a sharp rise in system pressure. When the pressure exceeds the safety threshold set by the system, the high-pressure protection mechanism is activated, and the equipment is forced to shut down, which not only seriously affects the continuity of industrial production, but also may cause damage to product quality and production equipment. SUMMARY

[0004] The utility model aims at providing a kind of bidirectional throttling pipeline for heat pump air conditioning system to solve the problems raised in the above background.

[0005] In order to achieve the above object, the utility model provides following technical scheme: A two-way throttling pipeline for heat pump air conditioning system, including centrifugal fan, evaporator subassembly, axial flow fan and copper pipe, the evaporator subassembly is connected with first air conditioning stop valve through copper pipe fixedly, first air conditioning stop valve is connected with four -way reversing valve through copper pipe fixedly, four -way reversing valve bottom is connected with compressor through copper pipe fixedly, the copper pipe surface between four -way reversing valve and compressor is connected with high -voltage meter fixedly, high -voltage meter bottom is connected with high -voltage switch through copper pipe fixedly, the copper pipe fixedly connected with low -voltage meter between compressor bottom and four -way reversing valve top, low -voltage switch is connected with low -voltage switch through copper pipe fixedly in low -voltage meter bottom, four -way reversing valve and compressor are connected with solenoid valve through copper pipe fixedly, four -way reversing valve right side is connected with condenser subassembly through copper pipe fixedly, evaporator subassembly bottom is connected with second air conditioning stop valve through copper pipe fixedly, second air conditioning stop valve is connected with pressure relief valve through copper pipe fixedly, pressure relief valve is connected with check valve through copper pipe fixedly, check valve is connected with copper two -way filter through copper pipe fixedly, second air conditioning stop valve and copper two -way filter are connected with expansion valve through copper pipe fixedly, the copper pipe surface is provided with sealing mechanism.

[0006] Preferably, the centrifugal fan is installed in the indoor unit, and the axial flow fan is installed in the outdoor unit.

[0007] Preferably, the solenoid valve is fixedly connected to the copper pipe surface between the compressor and the four-way reversing valve through the copper pipe.

[0008] Preferably, the condenser subassembly is fixedly connected with the copper two-way filter through the copper pipe.

[0009] Preferably, the sealing mechanism comprises a fixed ring fixedly connected to the copper pipe surface, a slide rod provided on the left side of the fixed ring, a limiting plate fixedly connected to the right end of the slide rod, a sealing ring fixedly connected to the left end of the slide rod, a fixed plate fixedly connected to the surface of the slide rod near the left end, and a spring sleeved between the fixed ring and the fixed plate on the surface of the slide rod.

[0010] Preferably, a hole matched with the slide rod is formed on the left side of the fixed ring, and the spring surface penetrates and is connected to the hole left and right, and the limiting plate limits the slide rod so that the right end of the slide rod cannot slide out of the hole formed on the left side of the fixed ring.

[0011] Preferably, the right end is fixedly connected to the left side of the fixed ring, the left end of the spring is fixedly connected to the right side of the fixed plate, the inner wall of the sealing ring is connected to the surface of the copper pipe left and right, and the sealing mechanism has two groups and is symmetrically arranged on the copper pipe surfaces connected to the left and right ends of the copper two-way filter.

[0012] Compared with the prior art, the bidirectional throttling pipeline for the heat pump air conditioning system has the following beneficial effects:

[0013] 1、The bidirectional throttling pipeline for the heat pump air conditioning system realizes efficient refrigeration and heating circulation. The orderly connection of the evaporator assembly with the first air conditioning stop valve, the four-way reversing valve and the compressor ensures the reasonable flow of the refrigerant in the system. In the refrigeration mode, the refrigerant absorbs indoor heat after passing through the evaporator, enters the compressor through the four-way reversing valve, and then is cooled by the condenser assembly. In this way, the indoor temperature is efficiently reduced. In the heating mode, the four-way reversing valve is switched, the flow direction of the refrigerant is changed, the heat is transferred from the outdoor to the indoor, the user's heating demand is met, and the high-pressure gauge and the low-pressure gauge arranged in the pipeline can accurately monitor the high-pressure and low-pressure states in the system. When the system pressure exceeds the normal working range, the switch will act quickly to cut off the circuit in time, thereby protecting the key components such as the compressor from damage caused by high or low pressure, greatly improving the stability and safety of the system operation, and prolonging the service life of the equipment.

[0014] 2、The bidirectional throttling pipeline for the heat pump air conditioning system provides reliable protection for the sealing property of the pipeline through the unique design of the sealing mechanism. The fixed ring in the sealing mechanism is fixed on the surface of the copper pipe, the sliding rod can slide left and right in the fixed ring, and the limiting plate prevents the sliding rod from coming out. The spring force makes the sealing ring tightly fit on the surface of the copper pipe, effectively preventing the refrigerant from leaking. The two groups of sealing mechanisms symmetrically arranged on the surfaces of the copper pipes at both ends of the copper bidirectional filter further enhance the sealing effect of the key parts and reduce the problems of refrigeration and heating efficiency reduction and energy waste caused by leakage. BRIEF DESCRIPTION OF DRAWINGS

[0015] In order to more clearly illustrate the technical scheme in the embodiments of the present application, the following will briefly introduce the drawings needed in the embodiment description. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can also be obtained by those skilled in the art without creative labor:

[0016] Figure 1 It is a three-dimensional schematic view of the structure of the present application;

[0017] Figure 2 It is a three-dimensional schematic view of the structure of the pressure relief valve and the expansion valve of the present application;

[0018] Figure 3 It is a three-dimensional schematic view of the sealing mechanism of the structure of the present application;

[0019] Figure 4 It is a three-dimensional schematic view of the fixed plate and the spring of the structure of the present application.

[0020] In the figure: 1, centrifugal fan; 2, evaporator assembly; 3, first air conditioning stop valve; 4, four-way reversing valve; 5, high pressure gauge; 6, high pressure switch; 7, compressor; 8, low pressure gauge; 9, low pressure switch; 10, solenoid valve; 11, condenser assembly; 12, axial flow fan; 13, second air conditioning stop valve; 14, pressure relief valve; 15, expansion valve; 16, check valve; 17, copper bidirectional filter; 18, copper pipe; 19, sealing mechanism; 191, fixed ring; 192, sliding rod; 193, limiting plate; 194, sealing ring; 195, fixed plate; 196, spring. DETAILED DESCRIPTION

[0021] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all the other embodiments obtained by those skilled in the art without creative work fall within the scope of the present application.

[0022] In the present application, unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connecting", "fixing" and the like should be understood in a broad sense, for example, can be fixed connection, or detachable connection, or integrated; can be mechanical connection, or electrical connection; can be directly connected, or indirectly connected through an intermediate medium; can be the communication inside two elements or the interaction relationship between two elements. For those skilled in the art, the specific meanings of the above terms in the present application can be understood according to the specific circumstances.

[0023] The present application provides the following technical solutions:

[0024] Embodiment one

[0025] Please refer to Figures 1-2The utility model provides a technical scheme: a kind of two-way throttling pipeline for heat pump air conditioning system, including centrifugal fan 1, evaporator assembly 2, axial fan 12 and copper pipe 18, evaporator assembly 2 is fixedly connected with first air conditioning stop valve 3 by copper pipe 18, first air conditioning stop valve 3 is fixedly connected with four-way reversing valve 4 by copper pipe 18, four-way reversing valve 4 bottom is fixedly connected with compressor 7 by copper pipe 18, copper pipe 18 surface between four-way reversing valve 4 and compressor 7 is fixedly connected with high voltage meter 5, high voltage meter 5 bottom is fixedly connected with high voltage switch 6 by copper pipe 18, compressor 7 bottom and four-way reversing valve 4 top are fixedly connected with low pressure gauge 8 by copper pipe 18, low pressure gauge 8 bottom is fixedly connected with low pressure switch 9 by copper pipe 18, four-way reversing valve 4 and compressor 7 are fixedly connected with solenoid valve 10 by copper pipe 18, four-way reversing valve 4 right side is fixedly connected with condenser assembly 11 by copper pipe 18, evaporator assembly 2 bottom is fixedly connected with second air conditioning stop valve 13 by copper pipe 18, second air conditioning stop valve 13 is fixedly connected with pressure relief valve 14 by copper pipe 18, pressure relief valve 14 is fixedly connected with check valve 16 by copper pipe 18, check valve 16 is fixedly connected with copper two-way filter 17 by copper pipe 18, second air conditioning stop valve 13 and copper two-way filter 17 are fixedly connected with expansion valve 15 by copper pipe 18, copper pipe 18 surface is provided with sealing mechanism 19.

[0026] Centrifugal fan 1 is installed in indoor unit, and axial fan 12 is installed in outdoor unit.

[0027] The bottom of solenoid valve 10 is fixedly connected to the surface of copper pipe 18 between compressor 7 and four-way reversing valve 4 by copper pipe 18.

[0028] Condenser assembly 11 is fixedly connected with copper two-way filter 17 by copper pipe 18.

[0029] Embodiment two

[0030] Please refer to Figures 3-4 And on the basis of embodiment one, further obtain sealing mechanism 19.

[0031] Sealing mechanism 19 includes fixed ring 191, and fixed ring 191 is fixedly connected to the surface of copper pipe 18, fixed ring 191 left side is provided with sliding rod 192, and the right end of sliding rod 192 is fixedly connected with limiting plate 193, the left end of sliding rod 192 is fixedly connected with sealing ring 194, and the surface of sliding rod 192 is fixedly connected with fixed plate 195 close to left end, and spring 196 is sleeved between the surface of sliding rod 192 and fixed plate 195 and fixed ring 191.

[0032] Fixed ring 191 left side is provided with the hole matched with sliding rod 192, and the surface of spring is penetrated and left and right slidingly connected in the hole, and limiting plate 193 limits sliding rod 192, so that the right end of sliding rod 192 cannot slide out from the hole left side of fixed ring 191.

[0033] The sealing mechanism 19 is connected to the fixed ring 191 at the right end, and the spring 196 is connected to the fixed plate 195 at the left end. The sealing ring 194 is connected to the surface of the copper pipe 18 through the left and right sliding connection of the inner wall. The sealing mechanism 19 has two groups and is symmetrically arranged on the surface of the copper pipe 18 connected to the left and right ends of the copper bidirectional filter 17.

[0034] In actual operation, when the device is used, in the cooling mode, after the system starts, the centrifugal fan 1 in the indoor unit starts to operate, which promotes the indoor air to flow through the evaporator assembly 2. At this time, the low-temperature and low-pressure refrigerant enters the evaporator assembly 2, which is connected to the first air conditioning stop valve 3 through the copper pipe 18. The first air conditioning stop valve 3 can control the on-off of the refrigerant, which is convenient for system maintenance and repair. The refrigerant absorbs the heat of the indoor air in the evaporator assembly 2, and vaporizes from liquid to gas, thereby realizing the cooling of the indoor air. The evaporated gaseous refrigerant flows to the four-way reversing valve 4 through the copper pipe 18. The four-way reversing valve 4 is in a specific reversing state in the cooling mode, which guides the refrigerant to the compressor 7. The compressor 7 compresses the low-temperature and low-pressure gaseous refrigerant sucked from the four-way reversing valve 4, so that it becomes high-temperature and high-pressure gaseous refrigerant. On the copper pipe 18 between the compressor 7 and the four-way reversing valve 4, the high-pressure table 5 monitors the high-pressure state of the refrigerant in real time, and the high-pressure switch 6 quickly cuts off the circuit when the pressure exceeds the set range, thereby protecting the compressor 7 and other components. The high-temperature and high-pressure gaseous refrigerant discharged from the compressor 7 again passes through the four-way reversing valve 4, and then flows to the condenser assembly 11. The axial flow fan 12 is located in the outdoor unit, which accelerates the air flow around the condenser assembly 11 when it operates, so that the refrigerant exchanges heat with the outdoor air in the condenser assembly 11, releases heat to the outdoor, and the gaseous refrigerant gradually condenses into liquid. The liquid refrigerant flows out of the condenser assembly 11, reaches the second air conditioning stop valve 13 through the copper pipe 18. The second air conditioning stop valve 13 can also control the on-off of the refrigerant. The refrigerant then flows through the pressure relief valve 14, which opens the pressure relief when the system pressure abnormally rises, thereby ensuring the safety of the system. Subsequently, the refrigerant passes through the one-way valve 16, which ensures the one-way flow of the refrigerant to prevent backflow. Then it passes through the copper bidirectional filter 17, which can filter impurities in the refrigerant in both directions, thereby ensuring the purity of the refrigerant. Finally, the refrigerant passes through the expansion valve 15, which accurately adjusts the flow of the refrigerant according to the system working condition, so that it is reduced in pressure and temperature, and enters the evaporator assembly 2 again in the low-temperature and low-pressure liquid state, thereby completing the refrigeration cycle. When the system switches to the heating mode, the four-way reversing valve 4 changes the reversing state, so that the flow of the refrigerant changes. The refrigerant path that originally flowed from the evaporator assembly 2 to the four-way reversing valve 4 and then to the compressor 7 changes. At this time, the condenser assembly 11 acts as an evaporator in the outdoor environment. The operation of the axial flow fan 12 makes the outdoor air flow through the condenser assembly 11. The low-temperature and low-pressure refrigerant absorbs heat from the outdoor air, changes from liquid to gas, and the gaseous refrigerant enters the compressor 7 through the four-way reversing valve 4 and is compressed into high-temperature and high-pressure gas. The high-pressure table 5 and the high-pressure switch 6 still monitor and protect the high-pressure side pressure. The compressed high-temperature and high-pressure gaseous refrigerant flows to the indoor evaporator assembly 2 through the four-way reversing valve 4, and at this time the evaporator assembly 2 acts as a condenser.The centrifugal fan 1 promotes indoor air to flow through the evaporator assembly 2, the refrigerant releases heat here, heats the indoor air, and condenses itself into a liquid state. The liquid refrigerant flows out of the evaporator assembly 2, passes through the second air conditioning stop valve 13, the pressure relief valve 14, the one-way valve 16, the copper bidirectional filter 17, and finally passes through the expansion valve 15 to reduce pressure, and returns to the outdoor condenser assembly 11 in a low-temperature and low-pressure liquid state, completing the heating cycle. The sealing mechanism 19 is installed on the surface of the copper pipe 18, and two sets of sealing mechanisms are symmetrically arranged on the copper pipe 18 at both ends of the copper bidirectional filter 17. The fixed ring 191 is fixed on the surface of the copper pipe 18, the sliding rod 192 penetrates the matching hole opened on the left side of the fixed ring 191, and the right end is connected with the limiting plate 193 to prevent the sliding rod 192 from coming out. The left end of the sliding rod 192 is connected with the sealing ring 194, and the fixed plate 195 is fixed on the sliding rod 192 close to the left end. The spring 196 is sleeved on the surface of the sliding rod 192 and located between the fixed ring 191 and the fixed plate 195. The spring 196 pushes the fixed plate 195, and then the sealing ring 194 tightly adheres to the surface of the copper pipe 18, effectively preventing the refrigerant from leaking, ensuring the normal circulation and pressure stability of the refrigerant in the system. The high-pressure gauge 5 and the low-pressure gauge 8 respectively monitor the refrigerant pressure on the high-pressure side and the low-pressure side of the outlet and inlet of the compressor 7. The high-pressure gauge 5 is installed on the surface of the copper pipe 18 between the four-way reversing valve 4 and the compressor 7, and the low-pressure gauge 8 is installed on the surface of the copper pipe 18 between the bottom of the compressor 7 and the top of the four-way reversing valve 4. The high-pressure switch 6 and the low-pressure switch 9 work with the high-pressure gauge 5 and the low-pressure gauge 8 respectively. When the pressure monitored by the high-pressure gauge 5 exceeds the high-pressure threshold set by the system, the high-pressure switch 6 quickly cuts off the circuit to stop the operation of the compressor 7 and other equipment, preventing damage to system components caused by excessive pressure. Similarly, when the pressure monitored by the low-pressure gauge 8 is lower than the low-pressure threshold set by the system, the low-pressure switch 9 cuts off the circuit to protect the system from low pressure damage, ensuring the stability and safety of the system.

[0035] It should be noted that, in the present document, relational terms such as first and second and the like can be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises", "comprising", or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but can include other elements not expressly listed or inherent to such process, method, article, or apparatus. An element proceeded by "comprises... a" does not, without more constraints, preclude the existence of additional identical elements in the process, method, article, or apparatus that comprises the element.

Claims

1. A bidirectional throttling pipeline for a heat pump air conditioning system, comprising a centrifugal fan (1), an evaporator assembly (2), an axial flow fan (12) and a copper pipe (18), characterized in that: The evaporator assembly (2) is fixedly connected with the first air conditioner stop valve (3) through the copper pipe (18), the first air conditioner stop valve (3) is fixedly connected with the four-way reversing valve (4) through the copper pipe (18), the copper pipe (18) surface between the four-way reversing valve (4) and the compressor (7) is fixedly connected with the high pressure gauge (5), the high pressure gauge (5) bottom is fixedly connected with the high pressure switch (6) through the copper pipe (18), the compressor (7) bottom and the four-way reversing valve (4) top are fixedly connected with the low pressure gauge (8) through the copper pipe (18), the low pressure gauge (8) bottom is fixedly connected with the low pressure switch (9) through the copper pipe (18), the four-way reversing valve (4) and the compressor (7) are fixedly connected with the electromagnetic valve (10) through the copper pipe (18), the four-way reversing valve (4) right side is fixedly connected with the condenser assembly (11) through the copper pipe (18), the evaporator assembly (2) bottom is fixedly connected with the second air conditioner stop valve (13) through the copper pipe (18), the second air conditioner stop valve (13) is fixedly connected with the pressure relief valve (14) through the copper pipe (18), the pressure relief valve (14) is fixedly connected with the check valve (16) through the copper pipe (18), the check valve (16) is fixedly connected with the copper bidirectional filter (17) through the copper pipe (18), the second air conditioner stop valve (13) and the copper bidirectional filter (17) are fixedly connected with the expansion valve (15) through the copper pipe (18), the copper pipe (18) surface is provided with sealing mechanism (19).

2. The bidirectional throttling line for a heat pump air conditioning system according to claim 1, characterized in that: The centrifugal fan (1) is installed in the indoor unit, and the axial fan (12) is installed in the outdoor unit.

3. The bidirectional throttling line for a heat pump air conditioning system according to claim 1, characterized in that: The electromagnetic valve (10) bottom is fixedly connected between the copper pipe (18) surface of the compressor (7) and the four-way reversing valve (4) through the copper pipe (18).

4. The bidirectional throttling line for a heat pump air conditioning system of claim 1, wherein: The condenser assembly (11) is fixedly connected with the copper bidirectional filter (17) through the copper pipe (18).

5. The bidirectional throttling line for a heat pump air conditioning system of claim 1, wherein: The sealing mechanism (19) comprises a fixed ring (191) fixedly connected to the surface of the copper pipe (18), a sliding rod (192) provided on the left side of the fixed ring (191), a limiting plate (193) fixedly connected to the right end of the sliding rod (192), a sealing ring (194) fixedly connected to the left end of the sliding rod (192), a fixed plate (195) fixedly connected to the surface of the sliding rod (192) close to the left end, and a spring (196) sleeved between the surface of the sliding rod (192) and the fixed ring (191) and the fixed plate (195).

6. The bidirectional throttling line for a heat pump air conditioning system according to claim 5, characterized in that: The fixed ring (191) is provided with a hole matched with the sliding rod (192) on the left side, and the spring surface penetrates and left and right slidingly connects in the hole, and the limiting plate (193) limits the sliding rod (192).

7. The bidirectional throttling line of claim 5, wherein: The right end is fixedly connected with the left side of the fixed ring (191), the left end of the spring (196) is fixedly connected with the right side of the fixed plate (195), the inner wall of the sealing ring (194) is slidably connected with the surface of the copper pipe (18), and the sealing mechanism (19) has two groups and is symmetrically arranged on the surface of the copper pipe (18) connected with the left and right ends of the copper bidirectional filter (17).

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