CN106247664B - A kind of carbon dioxide air source heat pump - Google Patents
A kind of carbon dioxide air source heat pump Download PDFInfo
- Publication number
- CN106247664B CN106247664B CN201610649990.0A CN201610649990A CN106247664B CN 106247664 B CN106247664 B CN 106247664B CN 201610649990 A CN201610649990 A CN 201610649990A CN 106247664 B CN106247664 B CN 106247664B
- Authority
- CN
- China
- Prior art keywords
- heat exchanger
- pipe
- hot water
- conduit
- heat
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B13/00—Compression machines, plants or systems, with reversible cycle
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B41/00—Fluid-circulation arrangements
- F25B41/40—Fluid line arrangements
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Heat-Pump Type And Storage Water Heaters (AREA)
Abstract
The invention discloses a kind of carbon dioxide air source heat pumps, including compressor, fluid reservoir, four way solenoid valve, first heat exchanger, second heat exchanger and third heat exchanger, the first exit end of the compressor is connected by conduit with the arrival end of the first hot water pipe-in-pipe in the first heat exchanger, the arrival end of hot water outlet pipe and the outlet end of hot water return pipe are connected separately on first heat exchanger, hot water water pump pipe is also connected on first heat exchanger, and hot water water pump is provided on hot water water pump pipe, the outlet end of first heat exchanger is connected by conduit with the first entrance end of four way solenoid valve, the first exit end of the four way solenoid valve is connected by conduit with the arrival end of the second hot water pipe-in-pipe in the second heat exchanger.The present invention uses indirect heating manner, and safe and reliable to operation, low energy consumption, and environmental protection, long service life can be effectively reduced maintenance cost, and improve the working efficiency and stability of equipment.
Description
Technical field
The present invention relates to air source heat pump technical field, specially a kind of carbon dioxide air source heat pump.
Background technique
Air source heat pump is
The equipment that cold (heat) wind or cold (heat) water are produced in cold (heat) source, main parts size include hot side exchange device, heat source side heat exchange set
Standby and compressor etc.；Air energy (source) heat pump is using the heat in air as low-temperature heat source, by cold in conventional air conditioner
Condenser or evaporator carry out heat exchange, then by the circulatory system, extract or release thermal energy, using the unit circulatory system by energy
It is transferred in building, meets user to demands such as domestic hot-water, floor heating or air-conditionings；On the one hand, common heat pump generally uses fluorine
As refrigerant, freon is all colourless gas or volatile liquid, slightly fragrance, low toxicity, chemical property at normal temperature for Leon
Stablize, freon is mainly used as refrigerant, since freon may destroy atmospheric ozone layer, use has been limited, at present on the earth
There are many ozone layer loopholes, some loopholes are to be more than African area, wherein very big reason is the chemistry because of freon
Substance, freon are the arch-criminals of depletion of the ozone layer, it is synthesis the 1920s, and chemical property is stablized, and not having can
Combustion property and toxicity, be taken as refrigerant, foaming agent and cleaning agent, be widely used in household electrical appliance, foamed plastics, household chemicals,
The fields such as automobile, fire-fighting equipment, after ozone layer is largely lost, the ability of ultraviolet radiation-absorbing weakens significantly, causes to reach
The Ultraviolet B of earth surface obviously increases, and brings various harm to human health and ecological environment；On the other hand, at present
Efficiency decaying is serious under the heat pump worst cold case of normal air source, influenced by local chilling temperatures it is bigger, or even can not be normal
Starting, causes the working efficiency of air source heat pump worst hot case to reduce, and operational safety reduces, and energy consumption is high, reduced service life.
Summary of the invention
The purpose of the present invention is to provide a kind of carbon dioxide air source heat pumps to have operation using indirect heating manner
Securely and reliably, low energy consumption, long service life, can be effectively reduced maintenance cost, and improves the working efficiency and stabilization of equipment
Property the advantages of, it is serious to solve under current normal air source heat pump worst cold case efficiency decaying, is influenced by local chilling temperatures
It is bigger, or even can not normally start, cause the working efficiency of air source heat pump worst hot case to reduce, operational safety reduces, energy
The problem of consumption is high, reduced service life.
To achieve the above object, the invention provides the following technical scheme: a kind of carbon dioxide air source heat pump, including compression
Machine, fluid reservoir, four way solenoid valve, the first heat exchanger, the second heat exchanger and third heat exchanger, the first of the compressor
Outlet end is connected by conduit with the arrival end of the first hot water pipe-in-pipe in the first heat exchanger, first heat exchanger
On be connected separately with the arrival end of hot water outlet pipe and the outlet end of hot water return pipe, be also connected on first heat exchanger
Hot water water pump pipe, and hot water water pump is provided on hot water water pump pipe.
The outlet end of first heat exchanger is connected by conduit with the first entrance end of four way solenoid valve, and described four
The first exit end of three-way electromagnetic valve is connected by conduit with the arrival end of the second hot water pipe-in-pipe in the second heat exchanger, institute
The outlet end of the arrival end that air-conditioner water outlet pipe is connected separately on the second heat exchanger and air-conditioning return pipe is stated, second heat is handed over
It is also connected with air conditioner water pump line on changing planes, and is provided with water pump of air conditioner on air conditioner water pump line.
The outlet end of second heat exchanger is connected separately with the first check valve and in the first U-tube by conduit
Second one-way valve in two U-tubes, first U-tube are connected with the first port of fluid reservoir, and second U-tube passes through
Conduit is connected with first throttle valve, and the first throttle valve is connected with filter, the second port phase of the filter and fluid reservoir
It is connected to, the 4th check valve on third check valve and the second U-tube in first U-tube is handed over third heat by conduit
The arrival end of third hot water pipe-in-pipe in changing planes is connected, and the of the outlet end of the third heat exchanger and four way solenoid valve
Two arrival ends are connected, and the second outlet end of the four way solenoid valve is connected with gas-liquid separator by conduit, the gas-liquid separation
The outlet end of device is connected by conduit with the first entrance end of compressor.
Preferably, the second entrance end of the compressor is connected with gas cooler by conduit, and the of the compressor
Two outlet ends are connected with evaporator by conduit.
Preferably, it is connected between the evaporator and gas cooler by conduit, and evaporator and gas cooler
Between conduit on be provided with second throttle.
Preferably, the first hot water pipe-in-pipe, the second hot water pipe-in-pipe and third hot water pipe-in-pipe are in that continuous S type is bent
Shape is arranged in respectively in the first heat exchanger, the second heat exchanger and third heat exchanger, first heat exchanger, the second heat
It is provided in interchanger and third heat exchanger and erects straight arranged stationary grizzly.
Compared with prior art, beneficial effects of the present invention are as follows: the present invention uses indirect heating manner, and operational safety can
It leans on, low energy consumption, and environmental protection, long service life can be effectively reduced maintenance cost, and improve the working efficiency and stabilization of equipment
Property.
Detailed description of the invention
Fig. 1 is schematic structural view of the invention.
In figure: 1 compressor, 2 fluid reservoirs, 3 four way solenoid valves, 4 first heat exchangers, 401 first hot water pipe-in-pipes, 402
Hot water outlet pipe, 403 hot water return pipes, 404 hot water water pump pipes, 405 hot water water pumps, 5 second heat exchangers, 501 second hot water
Pipe-in-pipe, 502 air-conditioner water outlet pipes, 503 air-conditioning return pipes, 504 air conditioner water pump lines, 505 water pump of air conditioner, 6 third heat exchangers,
601 third hot water pipe-in-pipes, 7 first U-tubes, 701 first check valves, 702 third check valves, 8 second U-tubes, 801 second lists
To valve, 802 the 4th check valves, 9 first throttle valves, 10 filters, 11 gas-liquid separators, 12 gas coolers, 13 evaporators, 14
Second throttle, 15 stationary grizzlies.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
Referring to Fig. 1, a kind of carbon dioxide air source heat pump, including compressor 1, fluid reservoir 2, four way solenoid valve 3, first
Heat exchanger 4, the second heat exchanger 5 and third heat exchanger 6 use indirect heating manner and water and exchange heat, do not have
The first exit end of the security risks such as electric leakage, gas leakage, compressor 1 passes through the first hot-water line in conduit and the first heat exchanger 4
The arrival end of casing 401 is connected, and the arrival end and hot water that hot water outlet pipe 402 is connected separately on the first heat exchanger 4 return
The outlet end of water pipe 403 is also connected with hot water water pump pipe 404 on first heat exchanger 4, and is provided on hot water water pump pipe 404
Hot water water pump 405, the carbon dioxide air source heat pump obtain two parts or more freely using a electric energy, while from outdoor air
Air energy, three parts or more of thermal energy can be produced, high-efficiency environment friendly monthly saves nearly 75% electricity charge compared to electric heating, can
The considerable electricity charge are saved for user, allow users to that machine cost will soon be withdrawn, compressor 1 is that paddy takes turns scroll compression
Machine carries EVI air injection enthalpy-increasing technology in paddy wheel screw compressor and makes air source heat pump under the weather conditions down to -20 DEG C
It remains to work normally, using carbon dioxide as air-source, heating effect in winter is better than conventional air source heat pump.
The outlet end of first heat exchanger 4 is connected by conduit with the first entrance end of four way solenoid valve 3, four-way electromagnetic
The first exit end of valve 3 is connected by conduit with the arrival end of the second hot water pipe-in-pipe 501 in the second heat exchanger 5, the
The arrival end of air-conditioner water outlet pipe 502 and the outlet end of air-conditioning return pipe 503 are connected separately on two heat exchangers 5, the second heat is handed over
It changes planes and is also connected with air conditioner water pump line 504 on 5, and be provided with water pump of air conditioner 505 on air conditioner water pump line 504, pass through four-way electromagnetic
Valve 3 is used in parallel the heat exchanger of multiple groups same model, it is ensured that the work of whole group water heater integration meets amount of hot water peak and wants
Ask, largely to provide guarantee with hot water, when hot water usage amount is few, wherein one group of heat-exchanger can be only used and other
It closes, when maintenance can also turn off wherein one group of heat-exchanger and continue to provide hot water without influencing other heat-exchangers.
The outlet end of second heat exchanger 5 is connected separately with 701 He of the first check valve in the first U-tube 7 by conduit
Second one-way valve 801 in second U-tube 8, the first U-tube 7 are connected with the first port of fluid reservoir 2, and the second U-tube 8 is logical
It crosses conduit and is connected with first throttle valve 9, first throttle valve 9 is connected with filter 10, the second end of the filter 10 and fluid reservoir 2
Mouthful be connected, the 4th check valve 802 on third check valve 702 and the second U-tube 8 in the first U-tube 7 by conduit with
The arrival end of third hot water pipe-in-pipe 601 in third heat exchanger 6 is connected.
First hot water pipe-in-pipe 401, the second hot water pipe-in-pipe 501 and third hot water pipe-in-pipe 601 are curved in continuous S type
It is arranged in the first heat exchanger 4, the second heat exchanger 5 and third heat exchanger 6 respectively, first the 4, second heat of heat exchanger is handed over
It changes planes to be provided in 5 and third heat exchanger 6 and erects straight arranged stationary grizzly 15, the outlet end of third heat exchanger 6 and four
The second entrance end of three-way electromagnetic valve 3 is connected, and the second outlet end of four way solenoid valve 3 is connected with gas-liquid separator by conduit
11, the mountable entrance in gas compressor 1 of gas-liquid separator 11 is used for gas-liquid separation, is fractionated gas after tower top condensate cooler
The gas phase demisting etc. of phase demisting, various gas scrubbing towers, absorption tower and Analytic Tower, gas-liquid separator can also be applied to gas and remove
Dirt, a variety of industry such as water-oil separating and liquid removal impurity and civil applications occasion, the outlet end of the gas-liquid separator 11 pass through
Conduit is connected with the first entrance end of compressor 1, safe and reliable to operation using indirect heating manner, low energy consumption, and environmental protection makes
It is long with the service life, it can be effectively reduced maintenance cost, and improve the working efficiency and stability of equipment.
The second entrance end of compressor 1 is connected with gas cooler 12 by conduit, which is condenser,
Running water pipe and hot-water line are connected separately on gas cooler 12, the second outlet end of compressor 1 is connected with steaming by conduit
Device 13 is sent out, is connected between evaporator 13 and gas cooler 12 by conduit, and between evaporator 13 and gas cooler 12
Conduit on be provided with second throttle 14, second throttle 14 can adjust two between evaporator 13 and gas cooler 12
Carbon oxide gas flowing velocity.
The carbon dioxide air source heat pump utilizes inverse Carnot's principle, with few electric energy, absorbs a large amount of low temperature in air
Thermal energy, using carbon dioxide as air-source, heating effect in winter is better than conventional air source heat pump, passes through the compression of compressor 1
Become high temperature heat, not only energy saving, but also efficiently, in operation, evaporator 13 is from the environment thermal energy in air for air source heat pump
Middle draw heat is with evaporation heat transfer working medium, and refrigerant vapor pressure and temperature after the compression of compressor 1 rises, and high-temperature vapour is by forever
When the long special ring pipe condenser cohered in 2 outer surface of fluid reservoir is condensed into liquid, the heat transfer released is to air
Water in source heat pump fluid reservoir 2, condensed heat-transfer working medium return to evaporator 13 by each valve, are then evaporated again,
Loop back and forth like this, applied widely, Applicable temperature range is at -7 to 40 DEG C, and round-the-clock use throughout the year, not by yin,
The influence of the bad weathers such as rain, snow and night in winter, all can normal use, can laser heating, with traditional solar energy storage-type phase
Than, the carbon dioxide air source heat pump can laser heating, constant supplying hot water, environmental protection, no pollution to the environment can satisfy use
Family demand is suitble to all kinds of group's hot water engineerings to use.
It although an embodiment of the present invention has been shown and described, for the ordinary skill in the art, can be with
A variety of variations, modification, replacement can be carried out to these embodiments without departing from the principles and spirit of the present invention by understanding
And modification, the scope of the present invention is defined by the appended.
Claims (4)
1. a kind of carbon dioxide air source heat pump, including compressor (1), fluid reservoir (2), four way solenoid valve (3), the first heat exchange
Machine (4), the second heat exchanger (5) and third heat exchanger (6), it is characterised in that: the first exit end of the compressor (1) is logical
It crosses conduit to be connected with the arrival end of the first hot water pipe-in-pipe (401) in the first heat exchanger (4), first heat exchanger
(4) arrival end of hot water outlet pipe (402) and the outlet end of hot water return pipe (403) are connected separately on, first heat is handed over
It changes planes and is also connected with hot water water pump pipe (404) on (4), and be provided with hot water water pump (405) on hot water water pump pipe (404)；
The outlet end of first heat exchanger (4) is connected by conduit with the first entrance end of four way solenoid valve (3), described
The first exit end of four way solenoid valve (3) is entered by conduit and second hot water pipe-in-pipe (501) in the second heat exchanger (5)
Mouth end is connected, and the arrival end and air-conditioning return pipe of air-conditioner water outlet pipe (502) are connected separately on second heat exchanger (5)
(503) outlet end is also connected with air conditioner water pump line (504) on second heat exchanger (5), and air conditioner water pump line (504)
On be provided with water pump of air conditioner (505)；
The outlet end of second heat exchanger (5) is connected separately with the first check valve on the first U-tube (7) by conduit
(701) second one-way valve (801) and in the second U-tube (8), the first port of first U-tube (7) and fluid reservoir (2)
It is connected, second U-tube (8) is connected with first throttle valve (9) by conduit, and the first throttle valve (9) was connected with
Filter (10), the filter (10) are connected with the second port of fluid reservoir (2), and the third on first U-tube (7) is unidirectional
The 4th check valve (802) on valve (702) and the second U-tube (8) is warm with the third in third heat exchanger (6) by conduit
The arrival end of water pipe casing (601) is connected, and the second of the outlet end of the third heat exchanger (6) and four way solenoid valve (3)
Arrival end is connected, and the second outlet end of the four way solenoid valve (3) is connected with gas-liquid separator (11), the gas-liquid by conduit
The outlet end of separator (11) is connected by conduit with the first entrance end of compressor (1).
2. a kind of carbon dioxide air source heat pump according to claim 1, it is characterised in that: the of the compressor (1)
Two arrival ends are connected with gas cooler (12) by conduit, and the second outlet end of the compressor (1) is connected with by conduit
Evaporator (13).
3. a kind of carbon dioxide air source heat pump according to claim 2, it is characterised in that: the evaporator (13) and gas
Body cooler is connected between (12) by conduit, and is provided on the conduit between evaporator (13) and gas cooler (12)
Second throttle (14).
4. a kind of carbon dioxide air source heat pump according to claim 1, it is characterised in that: the first hot water pipe-in-pipe
(401), the second hot water pipe-in-pipe (501) and third hot water pipe-in-pipe (601) are arranged in the first heat in continuous S type is curved respectively
In interchanger (4), the second heat exchanger (5) and third heat exchanger (6), first heat exchanger (4), the second heat exchanger
(5) it and is provided in third heat exchanger (6) and erects straight arranged stationary grizzly (15).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610649990.0A CN106247664B (en) | 2016-08-09 | 2016-08-09 | A kind of carbon dioxide air source heat pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610649990.0A CN106247664B (en) | 2016-08-09 | 2016-08-09 | A kind of carbon dioxide air source heat pump |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106247664A CN106247664A (en) | 2016-12-21 |
| CN106247664B true CN106247664B (en) | 2018-12-28 |
Family
ID=58078034
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610649990.0A Active CN106247664B (en) | 2016-08-09 | 2016-08-09 | A kind of carbon dioxide air source heat pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106247664B (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA2597572A1 (en) * | 2005-04-14 | 2006-10-26 | Carrier Corporation | Method for determining optimal coefficient of performance in a transcritical vapor compression system |
| CN101666562A (en) * | 2006-03-27 | 2010-03-10 | 三菱电机株式会社 | Refrigerating and air-conditioning plant |
| CN104879964A (en) * | 2015-05-21 | 2015-09-02 | 广东美的暖通设备有限公司 | Heat pump directly-heating type heating system with heat return device |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1695849A1 (en) * | 2005-02-28 | 2006-08-30 | Sanyo Electric Co., Ltd. | Refrigerant cycle unit |
-
2016
- 2016-08-09 CN CN201610649990.0A patent/CN106247664B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA2597572A1 (en) * | 2005-04-14 | 2006-10-26 | Carrier Corporation | Method for determining optimal coefficient of performance in a transcritical vapor compression system |
| CN101666562A (en) * | 2006-03-27 | 2010-03-10 | 三菱电机株式会社 | Refrigerating and air-conditioning plant |
| CN104879964A (en) * | 2015-05-21 | 2015-09-02 | 广东美的暖通设备有限公司 | Heat pump directly-heating type heating system with heat return device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106247664A (en) | 2016-12-21 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101672552B (en) | Tower heating pump complete device with solar energy secondary heat source | |
| CN105928200B (en) | A kind of air source heat pump high temperature water heating system suitable for low temperature environment | |
| CN104132477B (en) | Preheating type solar energy jetting-compression combined refrigeration system | |
| CN207688325U (en) | Three cold source air conditioning groups | |
| CN202675964U (en) | Heat superconductor water source heat exchanger | |
| CN103175324A (en) | Concurrent flow evaporative type condensation refrigerating unit with heat recovery | |
| CN101876496B (en) | Double-evaporator direct-fired absorption refrigerating and heating unit | |
| CN201440013U (en) | Air conditioning unit | |
| CN106705203B (en) | A kind of family heat-pipe radiating apparatus compound using heat pump and electric heating | |
| CN205119549U (en) | Multi -functional heat pump type evaporation formula condensation air conditioning unit | |
| CN105180432A (en) | Heating method of indoor heating heat-pump water heater and system with indoor heating heat-pump water heater | |
| CN209229831U (en) | A kind of integrated low temperature frequency conversion heating hot water unit | |
| CN201662220U (en) | Heat pump water heater | |
| WO2001002783A1 (en) | Multi-function thermodynamic device | |
| CN204404590U (en) | A kind of water source heat pump units | |
| CN106247664B (en) | A kind of carbon dioxide air source heat pump | |
| CN202660808U (en) | Novel heat pipe and heat pump combined refrigerating device | |
| CN201787767U (en) | Dual-system screw rod type total heat recovery ground source heat pump (GSHP) unit | |
| CN210399502U (en) | Heat pump system | |
| CN2394139Y (en) | Solar and geothermal apparatus for supplying cold and hot water | |
| CN204006448U (en) | The full Air Conditioning System with Heat of phase-transition heat-storage | |
| CN202853106U (en) | Air energy water heater | |
| CN101706180B (en) | Solar energy composite energy air-conditioning water heating device | |
| CN205561260U (en) | Can realize air -source heat bump water heater of many operational modes | |
| CN206803487U (en) | A kind of kitchen surplus energy utility Multifunctional heat pump system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| TA01 | Transfer of patent application right | ||
| TA01 | Transfer of patent application right |
Effective date of registration: 20181112 Address after: 264200 Laoshan South Road 788, Laoshan Town, Rongcheng City, Weihai City, Shandong Province Applicant after: SHANDONG ZUOYAO INTELLIGENT EQUIPMENT Co.,Ltd. Address before: 212217 Wynn bridge, Yongsheng street, eight Bridge Town, Yangzhong City, Zhenjiang, Jiangsu Applicant before: JIANGSU JIEYING ENERGY TECHNOLOGY Co.,Ltd. |
|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of invention: A carbon dioxide air source heat pump Effective date of registration: 20230822 Granted publication date: 20181228 Pledgee: Rongcheng sub branch of Postal Savings Bank of China Ltd. Pledgor: SHANDONG ZUOYAO INTELLIGENT EQUIPMENT Co.,Ltd. Registration number: Y2023980053280 |