CN211345652U - Evaporative cooling and mechanical refrigeration coupling type integrated air conditioning unit - Google Patents
Evaporative cooling and mechanical refrigeration coupling type integrated air conditioning unit Download PDFInfo
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- CN211345652U CN211345652U CN201921882689.XU CN201921882689U CN211345652U CN 211345652 U CN211345652 U CN 211345652U CN 201921882689 U CN201921882689 U CN 201921882689U CN 211345652 U CN211345652 U CN 211345652U
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Abstract
The utility model discloses an evaporative cooling and mechanical refrigeration coupling type integrated air conditioning unit, which comprises a unit shell, wherein a mechanical refrigeration unit and an air treatment unit which are separated by a partition plate are arranged in the unit shell, and the mechanical refrigeration unit passes through the partition plate through a pipeline G1 and a pipeline G2 and is connected with the air treatment unit to form a closed loop; an air outlet is arranged on the top wall of the unit shell corresponding to the top of the mechanical refrigeration unit, and an air inlet is arranged on the side wall of the unit shell corresponding to the mechanical refrigeration unit; and air inlets and air outlets are respectively arranged on two side walls of the unit shell at two adjacent sides of the air processing unit. The utility model discloses air conditioning unit to mechanical refrigeration plays appropriate effect as supplementary cold source when evaporative cooling is difficult to reach the designing requirement, guarantees that equipment can move all the year round, has used evaporative condenser simultaneously, has avoided the unsmooth problem of condenser heat dissipation in extreme high temperature day in summer.
Description
Technical Field
The utility model belongs to the technical field of air conditioning equipment, concretely relates to evaporative cooling and mechanical refrigeration manifold type integration air conditioning unit.
Background
The evaporative cooling ventilation air conditioning technology takes water as a cooling medium, and cools and dissipates heat of buildings or air through water evaporation and heat absorption, is widely applied to northwest regions and southeast coastal regions of China, but has large fluctuation along with outdoor parameter variation, and cannot ensure the temperature reduction range of the building or the air in hot and high-humidity regions or under extreme hot conditions in summer.
The mechanical refrigeration technology can prepare cold air with relatively stable temperature, but in comparison, the initial investment is high and the operation energy consumption is large. Therefore, under the strategic background of energy conservation and emission reduction in China, an energy-saving air conditioning device which can effectively reduce the energy consumption of a system while operating efficiently and stably is urgently needed by people so as to meet the comfort requirement of people on working and living environments.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing an evaporative cooling and mechanical refrigeration manifold type integration air conditioning unit combines together evaporative cooling system and mechanical refrigeration system, according to the outdoor meteorological condition of difference, switches different mode, and mechanical refrigeration plays appropriate effect as supplementary cold source when evaporative cooling is difficult to reach the designing requirement, guarantees that equipment can move all the year round, has used evaporative condenser simultaneously, has avoided the not smooth problem of heat dissipation of extreme high temperature day condenser in summer.
The utility model adopts the technical scheme that an evaporative cooling and mechanical refrigeration coupling type integrated air conditioning unit comprises a unit shell, wherein a mechanical refrigeration unit and an air treatment unit which are separated by a partition plate are arranged in the unit shell, and the mechanical refrigeration unit passes through the partition plate through a pipeline G1 and a pipeline G2 and is connected with the air treatment unit to form a closed loop;
an air outlet is arranged on the top wall of the unit shell corresponding to the top of the mechanical refrigeration unit, and an air inlet is arranged on the side wall of the unit shell corresponding to the mechanical refrigeration unit; and air inlets and air outlets are respectively arranged on two side walls of the unit shell at two adjacent sides of the air processing unit.
The utility model is also characterized in that,
the air processing unit comprises an air filter, a horizontal pipe indirect evaporative cooling section, an evaporator, a direct evaporative cooling section, a water baffle and a blower which are sequentially arranged in the unit shell according to the flowing direction of primary air; a secondary air outlet is formed in the top wall of the unit shell corresponding to the top of the horizontal pipe indirect evaporative cooling section, and a secondary air inlet is formed in the side wall of the unit shell corresponding to one side of the horizontal pipe indirect evaporative cooling section; the air inlet is positioned on the side wall of the unit shell between the partition plate and the air filter; the blower sends out the treated primary air through the air supply outlet; the evaporator is connected to the mechanical refrigeration unit via a conduit G1 and a conduit G2 to form a closed circuit.
The horizontal pipe indirect evaporative cooling section comprises a secondary exhaust fan, a water baffle b, a water distribution device b, a horizontal pipe type heat exchanger and a water storage tank b which are sequentially arranged from top to bottom; the water distribution device b is connected with the water storage tank b through a water supply pipe b, and a circulating water pump b and a valve b are arranged on the water supply pipe b;
the secondary exhaust fan is positioned below the secondary exhaust outlet, and the secondary air inlet is positioned on the corresponding side wall of the unit shell between the horizontal tube type heat exchanger and the water storage tank b.
The water storage tank b is also connected with a water supply pipe, and the end part of the water supply pipe extending into the water storage tank b is also provided with a ball float valve b.
The horizontal tube type heat exchanger comprises a plurality of layers of tube groups which are sequentially arranged from top to bottom, each layer of tube group consists of a plurality of heat exchange circular tubes which are horizontally arranged, and the surfaces of the heat exchange circular tubes are rough surfaces.
The direct evaporative cooling section comprises a water distribution device c, a filler and a water storage tank c which are sequentially arranged from top to bottom, the water distribution device c is connected with the water storage tank c through a water supply pipe c, and a circulating water pump c and a valve c are arranged on the water supply pipe c.
The water storage tank c is also connected with a water supply pipe, and the end part of the water supply pipe extending into the water storage tank c is also provided with a ball float valve c.
The mechanical refrigeration unit comprises an exhaust fan, a water baffle a, a water distribution device a, a condenser, a compressor and a water storage tank a which are sequentially arranged from top to bottom, wherein the water distribution device a is connected with the water storage tank a through a water supply pipe a; a circulating water pump a and a valve a are arranged on the water supply pipe a;
the evaporator is respectively connected with the condenser and the compressor through a pipeline G1 and a pipeline G2, the evaporator (26) is connected with the compressor, and the evaporator, the condenser and the compressor form a closed loop; a thermostatic expansion valve is arranged on the pipeline G1;
the air inlet is positioned on the side wall of the unit shell corresponding to the condenser.
The water storage tank a is also connected with a water supply pipe, and the end part of the water supply pipe extending into the water storage tank a is also provided with a ball float valve a.
The condenser is an evaporative condenser.
The utility model has the advantages that:
(1) the utility model combines the evaporative cooling system with the mechanical refrigeration system, and can switch different operation modes according to outdoor meteorological conditions, thereby providing guarantee for the normal operation of the unit in extreme weather and expanding the application range; and evaporative cooling is utilized for cooling in most of time, so that the running time of mechanical refrigeration is reduced, and the energy consumption is saved.
(2) The utility model discloses air conditioning unit, horizontal tubular heat exchanger carry out the heat transfer pipe of coarse processing by many surfaces and constitute, more are favorable to adhering to of pipe surface water film, improve the heat exchange efficiency of outside of tubes secondary air and water film.
(3) The utility model discloses the used condenser of mechanical refrigeration unit among the air conditioning unit is evaporative condenser, condenser outside of tubes side trickle, and the air skims over the time takes place the heat transfer with the outside of tubes water film to this takes away the heat of intraductal refrigerant, and evaporative condenser can reach higher heat exchange efficiency, and just saves water about 30% than water-cooled condenser.
Drawings
Fig. 1 is a schematic structural diagram of an evaporative cooling and mechanical refrigeration coupling type integrated air conditioning unit of the present invention;
FIG. 2 is a schematic structural view of a horizontal indirect evaporative cooling section in the air conditioning unit of the present invention;
FIG. 3 is a schematic structural view of a circular heat exchange tube used in the air conditioning unit of the present invention;
fig. 4 is the working principle diagram of the horizontal tube heat exchanger in the air conditioning unit.
In the figure, 1, a circulating water pump a, 2, a compressor, 3, a water storage tank a, 4, a ball float valve a, 5, an air filter, 6, a ball float valve b, 7, a water storage tank b, 8, a circulating water pump b, 9, a water supply pipe b, 10, a ball float valve c, 11, a water storage tank c, 12, a circulating water pump c, 13, a water supply pipe c, 14, a blower, 15, a water supply pipe a, 16, a condenser, 17, a water distribution device a, 18, an exhaust fan, 19, an exhaust outlet, 20, a water baffle a, 21, an air inlet, 22, a water baffle b, 23, a secondary exhaust outlet, 24, a secondary exhaust fan, 25, a water distribution device b, 26, an evaporator, 27, a water distribution device c, 28, a filler, 29, a water baffle, 30, a thermal expansion valve, 31, an air inlet, 32, a partition board, 33, a horizontal pipe type heat exchanger, 34, a secondary air inlet, 35, a heat exchange circular pipe, 36, 37, 38. valves a, 39, valves c, 40, water supply pipe.
Detailed Description
The present invention will be described in detail with reference to the accompanying drawings and specific embodiments.
The utility model relates to an evaporative cooling and mechanical refrigeration coupling type integrated air conditioning unit, as shown in figures 1-4, comprising a unit shell, wherein a mechanical refrigeration unit and an air processing unit which are separated by a partition plate 32 are arranged in the unit shell, and the mechanical refrigeration unit passes through the partition plate 32 through a pipeline G1 and a pipeline G2 and is connected with the air processing unit to form a closed loop; the pipeline G1 and the pipeline G2 are both copper pipes;
an air outlet 19 is arranged on the top wall of the unit shell corresponding to the top of the mechanical refrigeration unit, and an air inlet 31 is arranged on the side wall of the unit shell corresponding to the mechanical refrigeration unit; the two side walls of the unit shell at two adjacent sides of the air processing unit are respectively provided with an air inlet 21 and an air outlet 36.
The air processing unit comprises an air filter 5, a horizontal pipe indirect evaporative cooling section, an evaporator 26, a direct evaporative cooling section, a water baffle 29 and a blower 14 which are sequentially arranged in the unit shell according to the flowing direction of primary air; a secondary air outlet 23 is arranged on the top wall of the unit shell corresponding to the top of the horizontal pipe indirect evaporative cooling section, and a secondary air inlet 34 is arranged on the side wall of the unit shell corresponding to one side of the horizontal pipe indirect evaporative cooling section; the air inlet 21 is positioned on the side wall of the unit shell between the partition plate 32 and the air filter 5; the blower 14 sends out the processed primary air through the air outlet 36; evaporator 26 is connected to the mechanical refrigeration unit by conduit G1 and conduit G2 to form a closed circuit.
The air filter 5 uses a bag filter.
As shown in fig. 2, the horizontal tube indirect evaporative cooling section includes a secondary exhaust fan 24, a water baffle b22, a water distribution device b25, a horizontal tube heat exchanger 33 and a water storage tank b7, which are sequentially arranged from top to bottom; the water distribution device b25 is connected with the water storage tank b7 through a water supply pipe b9, and a circulating water pump b8 and a valve b37 are arranged on the water supply pipe b 9;
the secondary air exhaust fan 24 is positioned below the secondary air exhaust outlet 23, and the secondary air inlet 34 is positioned on the corresponding side wall of the unit shell between the horizontal pipe type heat exchanger 33 and the water storage tank b 7.
The water supply pipe 40 is connected to the water storage tank b7, and a ball float valve b6 is also mounted at the end of the water supply pipe 40 extending into the water storage tank b 7.
As shown in fig. 3-4, the horizontal tube heat exchanger 33 includes a plurality of tube groups arranged in sequence from top to bottom, each tube group is composed of a plurality of horizontally arranged heat exchange round tubes 35, and the surfaces of the heat exchange round tubes 35 are rough surfaces.
The direct evaporation cooling section comprises a water distribution device c27, a filler 28 and a water storage tank c11 which are sequentially arranged from top to bottom, the water distribution device c27 is connected with the water storage tank c11 through a water supply pipe c13, and a circulating water pump c12 and a valve c39 are arranged on the water supply pipe c 13.
The filler 28 of the direct evaporative cooling section may be made of different materials such as metal aluminum foil, glass fiber, plant fiber, composite polymer material, stainless steel, etc. according to the application.
The water guard 29 is a corrugated type water guard.
The water baffle a20 above the condenser 16 and the water baffle b22 above the horizontal tube heat exchanger 33 are both fillers of paper fiber materials.
The water supply pipe 40 is connected to the water storage tank c11, and a ball float valve c10 is mounted on the end of the water supply pipe 40 extending into the water storage tank c 11.
The mechanical refrigeration unit comprises an exhaust fan 18, a water baffle a20, a water distribution device a17, a condenser 16, a compressor 2 and a water storage tank a3 which are arranged from top to bottom in sequence, wherein the water distribution device a17 is connected with the water storage tank a3 through a water supply pipe a 15; the water supply pipe a15 is provided with a circulating water pump a1 and a valve a 38;
the blower 14 is a centrifugal fan, and the exhaust fan 18 and the secondary exhaust fan 24 are axial fans.
The evaporator 26 is connected with the condenser 16 and the compressor 2 through a pipeline G1 and a pipeline G2, respectively, the evaporator 26 is connected with the compressor 2, and the evaporator 26, the condenser 16 and the compressor 2 form a closed loop; a thermostatic expansion valve 30 is arranged on the pipeline G1;
the air inlet 31 is located on a side wall of the unit housing corresponding to the condenser 16.
The water tank a3 is also connected with a water supply pipe 40, and the end of the water supply pipe 40 extending into the water tank a3 is also provided with a float valve a 4.
The condenser 16 is an evaporative condenser.
The utility model relates to an evaporative cooling and mechanical refrigeration manifold type integration air conditioning unit can realize following three kinds of different mode:
the mechanical refrigeration unit works: under the action of the circulating water pump a1, circulating water in the water storage tank a3 is conveyed to the water distribution device a17 through the water supply pipe a15 and is uniformly sprayed on the evaporative condenser 16, and a uniform water film is formed on the surface of the condenser 16. Outdoor air enters the mechanical refrigeration unit shell from the air inlet 31, passes through the condenser 16 from bottom to top, exchanges heat with a water film on the surface, carries away heat dissipation of the condenser 16, enables high-pressure and high-temperature gaseous refrigerant entering from the compressor 2 in the condenser 16 to be cooled into high-pressure and low-temperature liquid, then becomes low-temperature and low-pressure liquid through the thermal expansion valve 30, is supplied to the evaporator 26 of the air processing section through a pipeline G1, and is changed into gaseous state after the low-temperature and low-pressure liquid in the evaporator 26 absorbs heat of the processed air, and then returns to the compressor 2 through a pipeline G2 to complete a refrigeration cycle.
Direct Evaporative Cooling (DEC) mode: in winter or under dry working conditions, the mechanical refrigeration unit and the horizontal pipe indirect evaporation cooling section do not work; only the valve c39 is opened, the water circulating pump c12 is opened, and the direct evaporative cooling section is operated independently.
The treated air enters the unit from the air inlet 21, is filtered by the air filter 5 and then enters the direct evaporative cooling section to perform heat and moisture exchange with the water film on the surface of the filler 28, and after being cooled by isenthalpic, the air is sent into a room by the air blower 14.
Indirect-direct evaporative cooling (IDEC) mode: and in a transition season or a medium humidity working condition, closing the mechanical refrigeration unit, opening the valve b37, the valve c39, the circulating water pump b8 and the circulating water pump c12, and spraying the horizontal pipe type heat exchanger 33 of the horizontal pipe indirect evaporative cooling section and the filler 28 of the direct evaporative cooling section.
As shown in fig. 4, the secondary air enters the unit through the secondary air inlet 34, vertically passes through the tube bundle of the horizontal tube heat exchanger 33 from bottom to top, and is subjected to heat and moisture exchange with the water film outside the heat exchange circular tube 35, meanwhile, the primary air enters the unit from the air inlet 21, is filtered by the air filter 5 and enters the horizontal tube heat exchanger 33, transfers heat to the secondary air outside the pipe through the pipe wall and the water film, is subjected to isenthalpic cooling through the direct evaporative cooling section filler 28 after the temperature is reduced, and is further cooled and then is sent into the room by the blower 14. The secondary air having absorbed the heat is discharged through the secondary air outlet 23.
Indirect evaporative cooling-mechanical refrigeration (IEC + DX) mode: in summer hot weather or high-temperature high-humidity working conditions, the direct evaporative cooling section does not operate, the valve a38, the valve b37, the circulating water pump a1 and the circulating water pump b8 are opened, and the mechanical refrigeration unit and the horizontal indirect evaporative cooling section operate.
The primary air enters the unit from the air inlet 21, is filtered by the air filter 5, is pre-cooled by the horizontal tube type heat exchanger 33, is further dehumidified and cooled by the evaporator 26, and is sent to the room by the blower 14, and the liquid in the evaporator 26 absorbs heat and then turns into gaseous state, and returns to the compressor of the mechanical refrigeration unit through the pipeline G2 to complete a refrigeration cycle.
The working process of the water system is as follows:
when the direct/indirect evaporative cooling section works, under the action of a circulating water pump c 12/a circulating water pump b8, circulating water in a water storage tank c 11/a water storage tank b7 is conveyed to a water distribution device c 27/a water distribution device b25 through a water supply pipe c 13/a water supply pipe b9, is uniformly sprayed on a filler 28/a horizontal pipe type heat exchanger 33, and flows back to the water storage tank c 11/the water storage tank b7 under the action of gravity for recycling after heat and moisture exchange with air;
when the water storage tanks a3, b7 and c11 are lack of water, the ball float valves a4, b6 and c10 can be opened automatically to replenish water to the water storage tanks through the water supply pipe 40, and when a certain water level is reached, the ball float valves a4, b6 and c10 are closed automatically to replenish water.
Claims (10)
1. An evaporative cooling and mechanical refrigeration coupling type integrated air conditioning unit is characterized by comprising a unit shell, wherein a mechanical refrigeration unit and an air treatment unit which are separated by a partition plate (32) are arranged in the unit shell, and the mechanical refrigeration unit penetrates through the partition plate (32) through a pipeline G1 and a pipeline G2 and is connected with the air treatment unit to form a closed loop;
an air outlet (19) is arranged on the top wall of the unit shell corresponding to the top of the mechanical refrigeration unit, and an air inlet (31) is arranged on the side wall of the unit shell corresponding to the mechanical refrigeration unit; and air inlets (21) and air outlets (36) are respectively arranged on two side walls of the unit shell at two adjacent sides of the air processing unit.
2. The evaporative cooling and mechanical refrigeration coupling type integrated air conditioning unit as claimed in claim 1, wherein the air processing unit comprises an air filter (5), a horizontal pipe indirect evaporative cooling section, an evaporator (26), a direct evaporative cooling section, a water baffle (29) and a blower (14) which are sequentially arranged in the unit shell according to the flowing direction of primary air; a secondary air outlet (23) is arranged on the top wall of the unit shell corresponding to the top of the horizontal pipe indirect evaporative cooling section, and a secondary air inlet (34) is arranged on the side wall of the unit shell corresponding to one side of the horizontal pipe indirect evaporative cooling section; the air inlet (21) is positioned on the side wall of the unit shell between the partition plate (32) and the air filter (5); the blower (14) sends out the processed primary air through the air supply outlet (36); the evaporator (26) is connected to the mechanical refrigeration unit by a conduit G1 and a conduit G2 to form a closed circuit.
3. The evaporative cooling and mechanical refrigeration coupling type integrated air conditioning unit as claimed in claim 2, wherein the horizontal pipe indirect evaporative cooling section comprises a secondary exhaust fan (24), a water baffle b (22), a water distribution device b (25), a horizontal pipe heat exchanger (33) and a water storage tank b (7) which are sequentially arranged from top to bottom; the water distribution device b (25) is connected with the water storage tank b (7) through a water supply pipe b (9), and a circulating water pump b (8) and a valve b (37) are arranged on the water supply pipe b (9);
the secondary exhaust fan (24) is positioned below the secondary exhaust outlet (23), and the secondary air inlet (34) is positioned on the corresponding side wall of the unit shell between the horizontal tube type heat exchanger (33) and the water storage tank b (7).
4. The evaporative cooling and mechanical refrigeration coupling type integrated air conditioning unit as recited in claim 3, wherein the water storage tank b (7) is further connected with a water supply pipe (40), and a float valve b (6) is further installed at an end of the water supply pipe (40) extending into the water storage tank b (7).
5. The evaporative cooling and mechanical refrigeration coupling type integrated air conditioning unit as claimed in claim 3, wherein the horizontal tube heat exchanger (33) comprises a plurality of layers of tube groups which are sequentially arranged from top to bottom, each layer of tube group is composed of a plurality of horizontally arranged heat exchange circular tubes (35), and the surfaces of the heat exchange circular tubes (35) are rough surfaces.
6. The evaporative cooling and mechanical refrigeration coupling type integrated air conditioning unit as claimed in claim 2, wherein the direct evaporative cooling section comprises a water distribution device c (27), a filler (28) and a water storage tank c (11) which are sequentially arranged from top to bottom, the water distribution device c (27) is connected with the water storage tank c (11) through a water supply pipe c (13), and a circulating water pump c (12) and a valve c (39) are arranged on the water supply pipe c (13).
7. The evaporative cooling and mechanical refrigeration coupling type integrated air conditioning unit as recited in claim 6, wherein the water storage tank c (11) is further connected with a water supply pipe (40), and a ball float valve c (10) is further installed at an end of the water supply pipe (40) extending into the water storage tank c (11).
8. The evaporative cooling and mechanical refrigeration coupling type integrated air conditioning unit as claimed in claim 2, wherein the mechanical refrigeration unit comprises an exhaust fan (18), a water baffle a (20), a water distribution device a (17), a condenser (16), a compressor (2) and a water storage tank a (3) which are sequentially arranged from top to bottom, and the water distribution device a (17) is connected with the water storage tank a (3) through a water supply pipe a (15); a circulating water pump a (1) and a valve a (38) are arranged on the water supply pipe a (15);
the evaporator (26) is respectively connected with the condenser (16) and the compressor (2) through a pipeline G1 and a pipeline G2, the evaporator (26) is connected with the compressor (2), and the evaporator (26), the condenser (16) and the compressor (2) form a closed loop; a thermostatic expansion valve (30) is arranged on the pipeline G1;
the air inlet (31) is positioned on the side wall of the unit shell corresponding to the condenser (16).
9. The evaporative cooling and mechanical refrigeration coupling type integrated air conditioning unit as recited in claim 8, wherein the water storage tank a (3) is further connected with a water supply pipe (40), and a float valve a (4) is further installed at an end of the water supply pipe (40) extending into the water storage tank a (3).
10. The evaporative cooling and mechanical refrigeration coupling type integrated air conditioning unit as recited in claim 8, wherein the condenser (16) is an evaporative condenser.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921882689.XU CN211345652U (en) | 2019-11-04 | 2019-11-04 | Evaporative cooling and mechanical refrigeration coupling type integrated air conditioning unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921882689.XU CN211345652U (en) | 2019-11-04 | 2019-11-04 | Evaporative cooling and mechanical refrigeration coupling type integrated air conditioning unit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211345652U true CN211345652U (en) | 2020-08-25 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921882689.XU Active CN211345652U (en) | 2019-11-04 | 2019-11-04 | Evaporative cooling and mechanical refrigeration coupling type integrated air conditioning unit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211345652U (en) |
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2019
- 2019-11-04 CN CN201921882689.XU patent/CN211345652U/en active Active
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Effective date of registration: 20221010 Address after: 3-1, Building 1, No. 39, Xinggu Road, Hangu Town, High-tech Zone, Shapingba District, Chongqing 404100 Patentee after: Chongqing fuchenxing Technology Co.,Ltd. Address before: 710048 Shaanxi province Xi'an Beilin District Jinhua Road No. 19 Patentee before: XI'AN POLYTECHNIC University Patentee before: Chongqing Shiyuan Technology Co.,Ltd. |
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Effective date of registration: 20221102 Address after: No.19, Jinhua South Road, Xi'an, Shaanxi 710000 Patentee after: XI'AN POLYTECHNIC University Patentee after: Chongqing fuchenxing Technology Co.,Ltd. Address before: 3-1, Building 1, No. 39, Xinggu Road, Hangu Town, High-tech Zone, Shapingba District, Chongqing 404100 Patentee before: Chongqing fuchenxing Technology Co.,Ltd. |