CN211782116U

CN211782116U - Throttling capillary tube assembly with different bidirectional throttling capacities for air conditioning system

Info

Publication number: CN211782116U
Application number: CN201922444560.7U
Authority: CN
Inventors: 乔利祥; 韩鑫
Original assignee: Weike Tianjin Co ltd
Current assignee: Weike Tianjin Co ltd
Priority date: 2019-12-28
Filing date: 2019-12-28
Publication date: 2020-10-27
Anticipated expiration: 2029-12-28

Abstract

The utility model provides an air conditioning system is with throttle capillary subassembly that two-way throttle ability is different belongs to the air conditioning system field, include and connect in parallel with electronic expansion valve and set up, including the diplopore check valve, the both ends intercommunication heating throttle capillary in one of them hole of diplopore check valve, first refrigeration capillary is connected to the one end in another hole, and the second refrigeration capillary is connected to the other end, first refrigeration capillary and second refrigeration capillary are connected respectively electronic expansion valve's both ends. The utility model can refrigerate at higher ambient temperature, and broadens the refrigeration operation range; under the condition of low-temperature heating, a part of refrigerant flows through the structure, so that the refrigerant flowing through the electronic expansion valve is more stable, and the heating capacity of the unit is improved.

Description

Throttling capillary tube assembly with different bidirectional throttling capacities for air conditioning system

Technical Field

The utility model belongs to the air conditioning system field relates to the different throttle capillary subassembly of two-way throttle ability for air conditioning system.

Background

Along with the improvement of economic level of people, the requirement of comfort level of people on living environment is higher and higher, the requirement of heat preservation in winter and the requirement of cooling in summer meet the requirement of people on temperature regulation and change of people in four seasons, an air conditioning system is developed, the air conditioning system is a system for processing the temperature, the humidity, the cleanliness and the airflow speed of indoor air by a manual method, and air with certain temperature, humidity and air quality can be obtained in certain places so as to meet the requirements of users and the production process and improve labor hygiene and indoor climate conditions.

Most throttling devices adopted by air-cooled cold water (heat pump) units in the market at present are electronic expansion valves and thermal expansion valves, the adjustment range of the thermal expansion valves is generally narrow at present, the heat pump units need to refrigerate and heat simultaneously, the environment temperature range of the applicable occasions is from minus 15 ℃ to plus 43 ℃, and the corresponding refrigerant evaporation temperature can work within the range of minus 25 ℃ to plus 5 ℃. Moreover, if there are multiple compressors in the refrigeration circuit, the number of compressors in operation varies with the load of the user, which causes a drastic change in the refrigerant flow rate, which limits the heating capacity of the unit.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the problem of providing a throttling capillary component with different bidirectional throttling capacities for an air conditioning system, which can refrigerate at higher ambient temperature and broaden the refrigeration operation range; under the condition of low-temperature heating, a part of refrigerant flows through the structure, so that the refrigerant flowing through the electronic expansion valve is more stable, and the heating capacity of the unit is improved.

In order to solve the technical problem, the utility model discloses a technical scheme is: the air conditioning system is arranged in parallel with the electronic expansion valve by using the throttling capillary tube components with different bidirectional throttling capacities, and comprises a double-hole one-way valve, wherein two ends of one hole of the double-hole one-way valve are communicated with the heating throttling capillary tube, one end of the other hole of the double-hole one-way valve is connected with the first refrigerating capillary tube, the other end of the other hole of the double-hole one-way valve is connected with the second refrigerating capillary tube, and the first refrigerating capillary tube and the second refrigerating capillary tube are respectively connected with.

The system further comprises a compressor, a reversing valve, a first heat exchanger, an electronic expansion valve and a second heat exchanger;

in the refrigeration loop, a medium passes through the compressor, sequentially passes through the reversing valve, the first heat exchanger, the electronic expansion valve and the second heat exchanger, and then returns to the compressor through the reversing valve again;

and in the heating loop, the medium passes through the compressor, sequentially passes through the second heat exchanger, the electronic expansion valve and the first heat exchanger, and then passes through the reversing valve loop again to reach the compressor.

Further, the first heat exchanger is a finned tube heat exchanger, and the second heat exchanger is a shell-and-tube heat exchanger or a plate heat exchanger.

Furthermore, the reversing valve is a four-way reversing valve, the reversing valve comprises a main pipe, a first branch pipe, a second branch pipe and a third branch pipe, the compressor is connected with the main pipe, the first branch pipe is connected with the first heat exchanger, the second branch pipe is connected with the compressor after passing through the gas-liquid separator, and the third branch pipe is connected with the second heat exchanger.

Further, in the refrigeration circuit, the first refrigeration capillary tube is an inlet, the second refrigeration capillary tube is an outlet, in the heating circuit, the second refrigeration capillary tube is a heating inlet, and the first refrigeration capillary tube is a heating outlet.

Compared with the prior art, the utility model has the advantages and positive effect as follows.

The utility model is used in cooperation with the electronic expansion valve, has bidirectional throttling capability, and on one hand, the electronic expansion valve with smaller drift diameter can be adopted to be matched with the structure to replace the electronic expansion valve with larger drift diameter, thereby saving the cost; on the other hand, under the high-temperature refrigeration condition, the structure has small flow resistance and large flow, and can flow more refrigerants to reduce the risk of high-temperature refrigeration exhaust of the unit, so that the unit can refrigerate at higher ambient temperature, and the refrigeration operation range is widened; under the condition of low-temperature heating, the structure has large flow resistance and small flow, and a part of refrigerant flows through the structure, so that the refrigerant flowing through the electronic expansion valve is more stable, the suction superheat degree cannot generate serious fluctuation, and the heating capacity of a unit is improved.

Drawings

The accompanying drawings, which form a part hereof, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention without undue limitation. In the drawings:

fig. 1 is a schematic structural view of a throttling capillary assembly with different bidirectional throttling capacities for an air conditioning system according to the present invention;

fig. 2 is a flow chart of practical application of the throttle capillary assembly with different bidirectional throttle capacities for the air conditioning system of the present invention.

Reference numerals:

1. a double-bore check valve; 2. a heating throttling capillary tube; 3. a first refrigeration capillary; 4. a second refrigeration capillary; 5. an electronic expansion valve; 6. a compressor; 7. a gas-liquid separator; 8. a diverter valve; 81. a main pipe; 82. a first branch pipe; 83. a second branch pipe; 84. a third branch pipe; 9. a first heat exchanger; 10. a second heat exchanger.

Detailed Description

It should be noted that, in the present invention, the embodiments and features of the embodiments may be combined with each other without conflict.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are used merely for convenience of description and for 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 therefore, should not be construed as limiting the present invention. Furthermore, the terms "first", "second", etc. 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, a feature defined as "first," "second," etc. may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, 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 meaning of the above terms in the present invention can be understood by those of ordinary skill in the art through specific situations.

The following detailed description of the embodiments of the present invention will be made with reference to the accompanying drawings.

As shown in fig. 1 and fig. 2, the utility model relates to a throttle capillary component with different bidirectional throttle capacities for an air conditioning system, which is arranged in parallel with an electronic expansion valve, and comprises a double-hole check valve 1, wherein two ends of one hole of the double-hole check valve 1 are communicated with a heating throttle capillary tube 2, one end of the other hole is connected with a first refrigeration capillary tube 3, the other end is connected with a second refrigeration capillary tube 4, the first refrigeration capillary tube 3 and the second refrigeration capillary tube 4 are respectively connected with two ends of the electronic expansion valve 5, the pipe diameters of the heating throttle capillary tube 2, the first refrigeration capillary tube 3 and the second refrigeration capillary tube 4 can be the same or different, the length and the inner diameter of the first refrigeration capillary tube 3 need to ensure that the refrigerant entering the double-hole check valve 1 is liquid refrigerant, the length and the inner diameter of the second refrigeration capillary tube 4 need to ensure that the unit will not jump to exhaust when the electronic expansion valve 5 is opened to the maximum step number when the refrigeration, the length and the inner diameter of the heating throttling capillary tube 2 are ensured to ensure that the minimum opening step number of the electronic expansion valve 5 is larger than a set value under low ambient temperature and the unit superheat degree can keep the set value without liquid impact.

Preferably, the system also comprises a compressor 6, a reversing valve 8, a first heat exchanger 9, an electronic expansion valve 5 and a second heat exchanger 10; in the refrigeration loop, a medium passes through the compressor 6 and sequentially passes through the reversing valve 8, the first heat exchanger 9, the electronic expansion valve 5 and the second heat exchanger 10, and then returns to the compressor 6 through the reversing valve 8; in the heating loop, a medium passes through the compressor 6, sequentially passes through the second heat exchanger 10, the electronic expansion valve 5 and the first heat exchanger 9, then passes through the reversing valve 8 again, and then returns to the compressor 6, and different requirements of cooling and heating are met according to different flow directions of the medium.

Preferably, the first heat exchanger 9 is a finned tube heat exchanger as an air side heat exchanger, and the second heat exchanger 10 is a shell-and-tube heat exchanger or a plate heat exchanger as an air-conditioning water side heat exchanger, so that the heat exchange efficiency is high.

Preferably, the reversing valve 8 is a four-way reversing valve 8, the reversing valve 8 comprises a main pipe 81, a first branch pipe 82, a second branch pipe 83 and a third branch pipe 84, the compressor 6 is connected with the main pipe 81, the first branch pipe 82 is connected with the first heat exchanger 9, the second branch pipe 83 is connected with the compressor 6 after passing through the gas-liquid separator 7, the third branch pipe 84 is connected with the second heat exchanger 10, and after the gas-liquid separator 7 is arranged, the liquid-carrying operation of the compressor 6 is avoided, the stability of the compressor 6 is improved, and the service life of the compressor 6 is prolonged.

Preferably, in the refrigeration circuit, the first refrigeration capillary tube 3 is an inlet, the second refrigeration capillary tube 4 is an outlet, in the heating circuit, the second refrigeration capillary tube 4 is a heating inlet, and the first refrigeration capillary tube 3 is a heating outlet, and the refrigeration circuit and the heating circuit play different roles, so that the function of bidirectional throttling is realized.

In the practical application process, when the unit is in refrigeration operation, the exhaust gas of the compressor 6 is discharged through the first heat exchanger 9 and then reaches a supercooled liquid refrigerant, one part of the supercooled liquid refrigerant is throttled by the electronic expansion valve 5 and then is changed into a low-temperature and low-pressure gas-liquid mixed refrigerant, and the other part of the supercooled liquid refrigerant is throttled by the first refrigeration capillary tube 3, the double-hole one-way valve 1 and the second refrigeration capillary tube 4 and then is converged with the refrigerant discharged from the electronic expansion valve 5, enters the shell-and-tube heat exchanger or the plate-type second heat exchanger 10, absorbs heat to the chilled water and evaporates the refrigerant to be changed into; when the unit heats, the exhaust gas of the compressor 6 passes through the shell-and-tube heat exchanger or the plate-type second heat exchanger 10 to release heat and then reaches a supercooled liquid refrigerant, one part of the supercooled liquid refrigerant passes through the electronic expansion valve 5, and considering that the reverse internal leakage amount of the electronic expansion valve 5 with the bidirectional balance flow port is larger than the forward internal leakage amount, the electronic expansion valve 5 is in reverse direction during refrigeration and in forward direction during heating, the other part of the supercooled liquid refrigerant passes through the second refrigeration capillary tube 4, the heating throttling capillary tube 2 and the first refrigeration capillary tube 3 to be throttled and then is converged with the low-temperature and low-pressure gas-liquid mixed refrigerant at the outlet of the electronic expansion valve 5, enters the finned tube heat exchanger to absorb heat and evaporate to low-temperature and low-pressure superheated vapor to the air, and then returns to the compressor 6 to complete a cycle, the, the electronic expansion valve 5 with a larger drift diameter is replaced, so that the cost is saved; on the other hand, under the high-temperature refrigeration condition, the structure has small flow resistance and large flow, and can flow more refrigerants to reduce the risk of high-temperature refrigeration exhaust of the unit, so that the unit can refrigerate at higher ambient temperature, and the refrigeration operation range is widened; under the condition of low-temperature heating, the structure has large flow resistance and small flow, and a part of refrigerant flows through the structure, so that the refrigerant flowing through the electronic expansion valve 5 is more stable, the suction superheat degree cannot generate serious fluctuation, and the heating capacity of a unit is improved.

While one embodiment of the present invention has been described in detail, the description is only a preferred embodiment of the present invention, and should not be considered as limiting the scope of the present invention. All the equivalent changes and improvements made according to the application scope of the present invention should still fall within the patent coverage of the present invention.

Claims

1. Air conditioning system is with two-way throttle capillary subassembly that throttling capacity is different, its characterized in that: the electronic expansion valve is arranged in parallel and comprises a double-hole one-way valve, two ends of one hole of the double-hole one-way valve are communicated with a heating throttling capillary tube, one end of the other hole of the double-hole one-way valve is connected with a first refrigerating capillary tube, the other end of the other hole of the double-hole one-way valve is connected with a second refrigerating capillary tube, and the first refrigerating capillary tube and the second refrigerating capillary tube are respectively connected with two ends of the electronic expansion valve.

2. The air conditioning system of claim 1 further comprising a throttling capillary assembly having different bi-directional throttling capabilities, wherein: the system also comprises a compressor, a reversing valve, a first heat exchanger, an electronic expansion valve and a second heat exchanger;

3. The air conditioning system of claim 2 further comprising a throttling capillary assembly having different bi-directional throttling capabilities, wherein: the first heat exchanger is a finned tube heat exchanger, and the second heat exchanger is a shell-and-tube heat exchanger or a plate heat exchanger.

4. The air conditioning system of claim 2 further comprising a throttling capillary assembly having different bi-directional throttling capabilities, wherein: the reversing valve is a four-way reversing valve, the reversing valve comprises a main pipe, a first branch pipe, a second branch pipe and a third branch pipe, the compressor is connected with the main pipe, the first branch pipe is connected with the first heat exchanger, the second branch pipe is connected with the compressor after passing through the gas-liquid separator, and the third branch pipe is connected with the second heat exchanger.

5. The air conditioning system of claim 2 further comprising a throttling capillary assembly having different bi-directional throttling capabilities, wherein: in the refrigeration loop, the first refrigeration capillary tube is an inlet, the second refrigeration capillary tube is an outlet, in the heating loop, the second refrigeration capillary tube is a heating inlet, and the first refrigeration capillary tube is a heating outlet.