CN109028636B - Double heat pump ground temperature regulating system - Google Patents
Double heat pump ground temperature regulating system Download PDFInfo
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- CN109028636B CN109028636B CN201810602513.8A CN201810602513A CN109028636B CN 109028636 B CN109028636 B CN 109028636B CN 201810602513 A CN201810602513 A CN 201810602513A CN 109028636 B CN109028636 B CN 109028636B
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- 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
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- 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
- F25B41/20—Disposition of valves, e.g. of on-off valves or flow control valves
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- 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
- F25B49/00—Arrangement or mounting of control or safety devices
- F25B49/02—Arrangement or mounting of control or safety devices for compression type machines, plants or systems
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
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- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Heat-Pump Type And Storage Water Heaters (AREA)
- Air Conditioning Control Device (AREA)
Abstract
The invention relates to the technical field of heat pumps. A double-heat-pump ground temperature regulating system comprises a heat pump system, wherein the heat pump system comprises heat pumps, a water tank, a three-way control valve and a pipeline, the heat pumps are air source heat pumps, two air source heat pumps are respectively a first air source heat pump and a second air source heat pump, and the two water tanks are respectively a high-temperature water tank and a low-temperature water tank; the high-temperature water tank is communicated with a domestic water supply pipeline, the low-temperature water tank is communicated with a ground temperature regulating system water pipeline, and the low-temperature water tank is also communicated with a fan coil of fresh air equipment; the temperature and humidity control system further comprises a control system, and the control system comprises a temperature and humidity control device and a temperature and humidity control device. The invention is characterized in that the high-temperature water tank can provide domestic water, the low-temperature water tank provides low-temperature hot water in winter and provides cold water in summer. The two air source heat pumps work alternately under a common condition, and the power of each air source heat pump is smaller than that of a common air conditioner or a ground temperature regulating system heat pump in the market. The invention achieves the purpose of one machine with multiple purposes and greatly reduces energy consumption.
Description
Technical Field
The invention relates to the technical field of heat pumps, in particular to a heat pump ground temperature regulating system.
Background
The ground temperature regulating system on the current market has single function and high energy consumption, and once the equipment breaks down, the equipment is usually required to be stopped for maintenance and cannot be used, so that troubles are brought to users. There is a need for a system that can provide both indoor temperature control and hot water for life
Disclosure of Invention
The invention aims to provide a double-heat-pump ground temperature regulating system to solve the technical problem.
The technical problem solved by the invention can be realized by adopting the following technical scheme:
a double-heat-pump ground temperature regulating system comprises a heat pump system, wherein the heat pump system comprises a heat pump, a water tank, a three-way control valve and a pipeline, and is characterized in that the heat pump is an air source heat pump, the number of the air source heat pumps is two, namely a first air source heat pump and a second air source heat pump, and the number of the water tanks is two, namely a high-temperature water tank and a low-temperature water tank; the water tank is connected with two inlets and two outlets of the heat pump working medium flow respectively;
the number of the three-way control valves is four, and the four three-way control valves are respectively a first three-way control valve, a second three-way control valve, a third three-way control valve and a fourth three-way control valve;
the first three-way control valve and the third three-way control valve are communicated with the first air source heat pump, the high-temperature water tank and the low-temperature water tank through pipelines; the second three-way control valve and the fourth three-way control valve are communicated with the second air source heat pump, the high-temperature water tank and the low-temperature water tank through pipelines;
the high-temperature water tank is communicated with a domestic water supply pipeline, the low-temperature water tank is communicated with a ground temperature regulating system water pipeline, and the low-temperature water tank is also communicated with a fan coil in fresh air equipment;
the utility model provides a two heat pump ground temperature regulating system, still includes control system, control system includes temperature and humidity control device and is used for controlling low temperature water tank goes out the controller of water flow direction.
The invention is characterized in that the high-temperature water tank can provide domestic water, the low-temperature water tank provides low-temperature hot water for indoor temperature rise in winter, and provides cold water for indoor temperature reduction in summer. The two air source heat pumps work alternately under a general condition and can work simultaneously only under an extreme condition, and the power of each air source heat pump is smaller than that of a heat pump of a common ground temperature regulating system on the market. The invention achieves the purpose of one machine with multiple purposes and greatly reduces energy consumption.
The heat pump system further comprises a single valve, one end of the single valve is communicated with the high-temperature water tank through a pipeline, and the other end of the single valve is communicated with the low-temperature water tank through a pipeline.
The temperature and humidity control device comprises four temperature sensors and four temperature and humidity sensors, and the four temperature sensors are respectively arranged at the top end and the bottom end of the side wall of the high-temperature water tank and the top end and the bottom end of the side wall of the low-temperature water tank;
the temperature and humidity sensors are at least three and are respectively arranged on the indoor ground and the wall at different heights;
the temperature sensor is preset with a set temperature, the set temperature of the temperature sensor in the high-temperature water tank is 50-55 ℃, the set temperature of the temperature sensor in the low-temperature water tank is 7-20 ℃ in summer and 30-40 ℃ in winter;
the temperature and humidity sensor is preset with a set temperature and humidity, and the set temperature and humidity is 70%.
The controller comprises two three-way control valves, namely a fifth three-way control valve and a sixth three-way control valve, wherein three pipe orifices of the fifth three-way control valve are respectively connected with a water outlet of the low-temperature water tank, a water inlet of a ground temperature regulating system water pipeline and a water inlet of the fan coil; and three pipe orifices of the sixth three-way control valve are respectively connected with a water return port of the low-temperature water tank, a water return port of a ground temperature regulating system water pipeline and a water return port of the fan coil.
The heat pump system is provided with a self-checking circuit, the self-checking circuit is connected with the control system, and the self-checking circuit is arranged on the first air source heat pump machine and the second air source heat pump machine.
The heat pump system is provided with an alarm device, the alarm device is connected with the control system, and the alarm device is arranged indoors;
and the alarm device is provided with two prompting lamps which respectively correspond to the first air source heat pump and the second air source heat pump.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a block diagram of a portion of the circuit of the present invention.
Detailed Description
In order to make the technical means, the creation characteristics, the achievement purposes and the effects of the invention easy to understand, the invention is further explained by combining the specific drawings.
Referring to fig. 1 and 2, the double-heat-pump ground temperature regulating system comprises a heat pump system, wherein the heat pump system comprises a heat pump, a water tank, a three-way control valve and a pipeline, the heat pump is an air source heat pump, the number of the air source heat pump is two, namely a first air source heat pump 1 and a second air source heat pump 2, and the number of the water tank is two, namely a high-temperature water tank 3 and a low-temperature water tank 4; the water tank is connected with two inlets and two outlets of the heat pump working medium flow respectively; the number of the three-way control valves is four, and the four three-way control valves are respectively a first three-way control valve 31, a second three-way control valve 32, a third three-way control valve 41 and a fourth three-way control valve 42; the first three-way control valve and the third three-way control valve are communicated with the first air source heat pump 1, the high-temperature water tank 3 and the low-temperature water tank 4 through pipelines; the second three-way control valve and the fourth three-way control valve are communicated with the second air source heat pump 2, the high-temperature water tank 3 and the low-temperature water tank 4 through pipelines; the high-temperature water tank 3 is communicated with a domestic water supply pipeline, the low-temperature water tank 4 is communicated with a ground temperature regulating system water pipeline 14, and the low-temperature water tank 4 is also communicated with a fan coil 24 in fresh air equipment; the device also comprises a control system 5, wherein the control system comprises a temperature and humidity control device 6 and a controller 7 for controlling the flow direction of the outlet water of the low-temperature water tank.
The invention is characterized in that the high-temperature water tank 3 can provide domestic water, the low-temperature water tank 4 can provide low-temperature hot water for indoor temperature rise in winter and provide cold water for indoor temperature reduction in summer. The two air source heat pumps work alternately under a general condition and can work simultaneously only under an extreme condition, and the power of each air source heat pump is smaller than that of a heat pump of a common ground temperature regulating system on the market. The invention achieves the purpose of one machine with multiple purposes and greatly reduces energy consumption.
The heat pump system also comprises a single valve 8, one end of the single valve 8 is communicated with the high-temperature water tank 3 through a pipeline, and the other end of the single valve is communicated with the low-temperature water tank 4 through a pipeline.
In winter, the water temperature in the low-temperature water tank 4 is set to be 30-40 ℃, and the water temperature in the high-temperature water tank 3 is set to be 50-55 ℃; the first air source heat pump 1 and the second air source heat pump 2 firstly heat the stored water in the low-temperature water tank 4, after the water temperature in the low-temperature water tank 4 reaches a set temperature, the control system 5 controls the single valve 8 to be opened, and the heated water in the low-temperature water tank 4 flows into the high-temperature water tank 3; after the high-temperature water tank 3 is filled with water, the control system 5 controls the single valve 8 to be closed, the first air source heat pump 1 continues to heat the stored water in the low-temperature water tank 4, the second air source heat pump 2 heats the stored water in the high-temperature water tank 3, and the second air source heat pump 2 stops working after the temperature of the water in the high-temperature water tank 3 reaches 50-55 ℃; when hot water in the high-temperature water tank 3 is sufficient, the first air source heat pump 1 and the second air source heat pump 2 only heat the low-temperature water tank 4; in the same time, one of the first air source heat pump 1 and the second air source heat pump 2 is in a working state, the other one is in a shutdown state, and the first air source heat pump 1 and the second air source heat pump 2 alternately work.
In summer, the water in the low-temperature water tank 4 is 7-20 ℃, the water in the high-temperature water tank 3 is 50-55 ℃, and the single valve 8 is always closed; the first air source heat pump 1 and the second air source heat pump 2 firstly cool the water stored in the low-temperature water tank 4, after the temperature of the water in the low-temperature water tank 4 is reduced to 20 ℃, the first air source heat pump 1 continues to cool the water stored in the low-temperature water tank 4, the second air source heat pump 2 heats the water stored in the high-temperature water tank 3, and after the temperature of the water in the high-temperature water tank 3 reaches 50-55 ℃, the second air source heat pump 2 stops working; when hot water in the high-temperature water tank 3 is sufficient, the first air source heat pump 1 and the second air source heat pump 2 only cool the low-temperature water tank; in the same time, one of the first air source heat pump 1 and the second air source heat pump 2 is in a working state, the other one is in a shutdown state, and the first air source heat pump 1 and the second air source heat pump 2 alternately work.
The temperature and humidity control device 6 comprises temperature sensors 61 and temperature and humidity sensors 62, wherein the number of the temperature sensors 61 is four, and the four temperature sensors are respectively arranged at the top end and the bottom end of the side wall of the high-temperature water tank 3 and the top end and the bottom end of the side wall of the low-temperature water tank 4; the temperature and humidity sensors are at least three and are respectively arranged on the indoor ground and the wall at different heights; the temperature sensor 61 is preset with a set temperature, the set temperature of the temperature sensor 61 in the high-temperature water tank 3 is 50-55 ℃, the set temperature of the temperature sensor 61 in the low-temperature water tank 4 is 7-20 ℃ in summer and 30-40 ℃ in winter; the temperature and humidity sensor 62 is preset with a set temperature and humidity, which is 70%.
When the air is extremely cold in winter, one air source heat pump is difficult to heat the water in the high-temperature water tank 3 and the low-temperature water tank 4 to the set temperature of the temperature sensor 61, the temperature sensor 61 feeds back to the control system 5, and the control system 5 controls the first air source heat pump 1 and the second air source heat pump 2 to work simultaneously;
when the weather is extremely hot in summer, the temperature of the water in the low-temperature water tank is difficult to be reduced to the set temperature of the temperature sensor 61 by one air source heat pump, the temperature sensor 61 feeds back to the control system 5, and the control system 5 controls the first air source heat pump 1 and the second air source heat pump 2 to work simultaneously;
in summer, when the indoor temperature and humidity reach the set temperature and humidity of 70%, the temperature and humidity sensor 62 feeds back to the control system 5, and the control system 5 controls the first air source heat pump 1 and the second air source heat pump 2 to reduce the temperature of water in the low-temperature water tank 4 to 7 ℃, and simultaneously controls a fan of the fresh air equipment to start dehumidification.
The controller 7 comprises two three-way control valves, namely a fifth three-way control valve 71 and a sixth three-way control valve 72, three pipe orifices of the fifth three-way control valve 71 are respectively connected with a water outlet of the low-temperature water tank 4, a water inlet of a ground temperature regulating system water pipeline and a water inlet of the fan coil; and three pipe orifices of the sixth three-way control valve 72 are respectively connected with a water return port of the low-temperature water tank 4, a water return port of a ground temperature regulating system water pipeline and a water return port of a fan coil.
In summer, when the indoor temperature and humidity reach the set temperature and humidity of 70%, the control system 5 controls the controller 7 to close the pipe orifice of the fifth three-way control valve 71 connected with the water inlet of the ground temperature regulating system water pipeline 14 and the pipe orifice of the sixth three-way control valve 72 connected with the water return port of the ground temperature regulating system water pipeline 14; after the fresh air equipment finishes the dehumidification work, the control system 5 controls the controller 7 to open the pipe orifices closed by the fifth three-way control valve 71 and the sixth three-way control valve 72.
The heat pump system is provided with a self-checking circuit 8, the self-checking circuit 8 is connected with the control system 5, and the self-checking circuit 8 is arranged on the first air source heat pump 1 and the second air source heat pump 2. The heat pump system is provided with an alarm device 9, the alarm device 9 is connected with the control system 5, and the alarm device 9 is arranged indoors; two prompting lamps are arranged on the alarm device 9 and respectively correspond to the first air source heat pump 1 and the second air source heat pump 2. When any one air source heat pump breaks down, the alarm system 9 gives out alarm sound, and meanwhile, the corresponding prompting lamp is turned on to remind a user of overhauling.
The foregoing shows and describes the general principles and broad features of the present invention and advantages thereof. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (3)
1. A double-heat-pump ground temperature regulating system comprises a heat pump system, wherein the heat pump system comprises a heat pump, a water tank, a three-way control valve and a pipeline, and is characterized in that the heat pump is an air source heat pump, the number of the air source heat pumps is two, namely a first air source heat pump and a second air source heat pump, and the number of the water tanks is two, namely a high-temperature water tank and a low-temperature water tank; the water tank is connected with two inlets and two outlets of the heat pump working medium flow respectively;
the number of the three-way control valves is four, and the four three-way control valves are respectively a first three-way control valve, a second three-way control valve, a third three-way control valve and a fourth three-way control valve;
the first three-way control valve and the third three-way control valve are communicated with the first air source heat pump, the high-temperature water tank and the low-temperature water tank through pipelines; the second three-way control valve and the fourth three-way control valve are communicated with the second air source heat pump, the high-temperature water tank and the low-temperature water tank through pipelines;
the high-temperature water tank is communicated with a domestic water supply pipeline, the low-temperature water tank is communicated with a ground temperature regulating system water pipeline, and the low-temperature water tank is also communicated with a fan coil in fresh air equipment;
the double-heat-pump ground temperature regulating system further comprises a control system, wherein the control system comprises a temperature and humidity control device and a controller for controlling the flow direction of the outlet water of the low-temperature water tank;
the heat pump system also comprises a single valve, one end of the single valve is communicated with the high-temperature water tank through a pipeline, and the other end of the single valve is communicated with the low-temperature water tank through a pipeline;
in winter, the water temperature in the low-temperature water tank is set to be 30-40 ℃, and the water temperature in the high-temperature water tank is set to be 50-55 ℃;
the first air source heat pump and the second air source heat pump firstly heat water stored in the low-temperature water tank, after the water temperature in the low-temperature water tank reaches a set temperature, the control system controls the single valve to be opened, and the water heated in the low-temperature water tank flows into the high-temperature water tank;
after the high-temperature water tank is filled with water, the control system controls the single valve to be closed, the first air source heat pump continues to heat the water stored in the low-temperature water tank, the second air source heat pump heats the water stored in the high-temperature water tank, and the second air source heat pump stops working after the water temperature in the high-temperature water tank reaches 50-55 ℃;
when hot water in the high-temperature water tank is sufficient, the first air source heat pump and the second air source heat pump only heat the low-temperature water tank;
in the same time, one of the first air source heat pump and the second air source heat pump is in a working state, the other one of the first air source heat pump and the second air source heat pump is in a shutdown state, and the first air source heat pump and the second air source heat pump alternately work;
in summer, the water in the low-temperature water tank is 7-20 ℃, the water in the high-temperature water tank is 50-55 ℃, and the single valve is always closed;
the first air source heat pump and the second air source heat pump firstly cool the water stored in the low-temperature water tank, after the temperature of the water in the low-temperature water tank is reduced to 20 ℃, the first air source heat pump continues to cool the water stored in the low-temperature water tank, the second air source heat pump heats the water stored in the high-temperature water tank, and after the temperature of the water in the high-temperature water tank reaches 50-55 ℃, the second air source heat pump stops working;
when hot water in the high-temperature water tank is sufficient, the first air source heat pump and the second air source heat pump only cool the low-temperature water tank;
in the same time, one of the first air source heat pump and the second air source heat pump is in a working state, the other one of the first air source heat pump and the second air source heat pump is in a shutdown state, and the first air source heat pump and the second air source heat pump alternately work;
the temperature and humidity control device comprises four temperature sensors and four temperature and humidity sensors, and the four temperature sensors are respectively arranged at the top end and the bottom end of the side wall of the high-temperature water tank and the top end and the bottom end of the side wall of the low-temperature water tank;
the temperature and humidity sensors are at least three and are respectively arranged on the indoor ground and the wall at different heights;
the temperature sensor is preset with a set temperature, the set temperature of the temperature sensor in the high-temperature water tank is 50-55 ℃, the set temperature of the temperature sensor in the low-temperature water tank is 7-20 ℃ in summer and 30-40 ℃ in winter;
the temperature and humidity sensor is preset with a set temperature and humidity, and the set temperature and humidity is 70%;
the controller comprises two three-way control valves, namely a fifth three-way control valve and a sixth three-way control valve, wherein three pipe orifices of the fifth three-way control valve are respectively connected with a water outlet of the low-temperature water tank, a water inlet of a ground temperature regulating system water pipeline and a water inlet of the fan coil; three pipe orifices of the sixth three-way control valve are respectively connected with a water return port of the low-temperature water tank, a water return port of a ground temperature regulating system water pipeline and a water return port of a fan coil;
in summer, when the indoor temperature and humidity reach 70% of the set temperature and humidity, the control system controls the controller to close the pipe orifice of the fifth three-way control valve connected with the water inlet of the ground temperature regulating system water pipeline and the pipe orifice of the sixth three-way control valve connected with the water return port of the ground temperature regulating system water pipeline; after the fresh air equipment finishes dehumidification, the control system controls the controller to open the pipe orifices closed by the fifth three-way control valve and the sixth three-way control valve;
when the air is extremely cold in winter, one air source heat pump is difficult to heat the water in the high-temperature water tank and the low-temperature water tank to the set temperature of the temperature sensor, the temperature sensor feeds back the water to the control system, and the control system controls the first air source heat pump and the second air source heat pump to work simultaneously;
when the summer weather is extremely hot, the temperature of the water in the low-temperature water tank is difficult to be reduced to the set temperature of the temperature sensor by one air source heat pump, the temperature sensor feeds back the water to the control system, and the control system controls the first air source heat pump and the second air source heat pump to work simultaneously;
in summer, when the indoor temperature and humidity reach the set temperature and humidity of 70%, the temperature and humidity sensor feeds back to the control system, and the control system controls the first air source heat pump and the second air source heat pump to reduce the temperature of water in the low-temperature water tank to 7 ℃, and simultaneously controls a fan of the fresh air equipment to start dehumidification.
2. The dual heat pump ground temperature conditioning system of claim 1, wherein the heat pump system is provided with a self-test circuit, the self-test circuit is connected with the control system, and the self-test circuit is arranged on the first air source heat pump and the second air source heat pump.
3. The dual heat pump ground temperature conditioning system of claim 1, wherein the heat pump system is provided with an alarm device, the alarm device is connected with the control system, and the alarm device is arranged indoors;
and the alarm device is provided with two prompting lamps which respectively correspond to the first air source heat pump and the second air source heat pump.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101363649B (en) * | 2008-09-25 | 2010-06-09 | 上海交通大学 | Geothermal heat pump air conditioning system for independently controlling temperature and humidity |
| CN101476760B (en) * | 2009-01-23 | 2012-04-18 | 曼瑞德自控系统（乐清）有限公司 | Multi-heat source dwelling house comfortable integration system based on solar energy |
| CN201396990Y (en) * | 2009-03-31 | 2010-02-03 | 淮安恒信水务科技有限公司 | High-low temperature waste water heat recycling heat pump system provided with running adjusting device |
| CN204026891U (en) * | 2014-08-19 | 2014-12-17 | 宁波天玑智能科技发展有限公司 | Recuperation of heat ladder-elevating temperature and water inflow control system |
| CN106568196A (en) * | 2016-10-18 | 2017-04-19 | 章郑州 | Air energy hot-water system and control method |
| CN206861677U (en) * | 2017-05-02 | 2018-01-09 | 华北电力大学（保定） | Based on the small-sized heat pump heat distribution system of comprehensive energy containing heat accumulation |
| CN107449175A (en) * | 2017-08-01 | 2017-12-08 | 青岛理工大学 | Water ring and air source heat pump heating system based on water at low temperature accumulation of heat |
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Effective date of registration: 20210901 Address after: 200335 floor 5, No. 277, Huqingping Road, Minhang District, Shanghai Patentee after: Heshi (Shanghai) Construction Technology Co.,Ltd. Address before: 201306 2, building 979, Yun Han Road, mud town, Pudong New Area, Shanghai Patentee before: WHOLE HOUSE (BEIJING) INTEGRATED BUILDING TECHNOLOGY Co.,Ltd. SHANGHAI BRANCH |
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Denomination of invention: Double heat pump ground temperature regulation system Effective date of registration: 20211217 Granted publication date: 20210223 Pledgee: Zhejiang Tailong Commercial Bank Co.,Ltd. Shanghai Zhabei sub branch Pledgor: Heshi (Shanghai) Construction Technology Co.,Ltd. Registration number: Y2021310000138 |
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| PC01 | Cancellation of the registration of the contract for pledge of patent right | ||
| PC01 | Cancellation of the registration of the contract for pledge of patent right |
Date of cancellation: 20230505 Granted publication date: 20210223 Pledgee: Zhejiang Tailong Commercial Bank Co.,Ltd. Shanghai Zhabei sub branch Pledgor: Heshi (Shanghai) Construction Technology Co.,Ltd. Registration number: Y2021310000138 |