CN115371258A - Air source heat pump water heater with built-in economizer in water side heat exchanger - Google Patents

Abstract

The invention discloses an air source heat pump water heater with a built-in economizer of a water side heat exchanger, which relates to the technical field of air source heat pump water heaters and solves the technical problems that the surface of an evaporator of the air source heat pump water heater is frosted after being used for a long time, if the frosted surface cannot be treated in time, the icing thickness is further increased, so that the whole device cannot normally operate, and then the heat exchanger cannot be quickly disassembled and cleaned.

Description

Air source heat pump water heater with built-in economizer in water side heat exchanger

technical field

The invention relates to the technical field of air source heat pump water heaters, in particular to an air source heat pump water heater with a built-in economizer in a water side heat exchanger.

Background technique

The air source heat pump water heater is a new type of high-efficiency and energy-saving water heater. The air source water heater can absorb the low-temperature heat in the air and convert it into high-temperature heat energy after being compressed by a compressor to heat the water. Air source heat pump water heaters produce the same amount of hot water, and the cost of consumption is only 1/4 of that of electric water heaters and 1/3 of that of gas water heaters, which is higher than the utilization rate of electric auxiliary solar water heaters.

According to the patent application number CN201510047199.8, the patent includes a box body, a columnar water tank arranged in the box body, a fan arranged in the box body, an evaporator and a compressor, and the compressor, fan and evaporator They are arranged radially between the inner wall of the tank and the water tank, and arranged in sequence along the circumferential direction of the water tank. The above-mentioned patent arranges the compressor, fan and evaporator between the inner wall of the tank and the water tank radially, and along the water tank The circumferential direction is arranged in sequence. The space between the box body and the water tank is fully utilized, and there is no need to specially set up a cavity to accommodate compressors, fans, evaporators, etc., which reduces the overall volume of the air source heat pump water heater and is convenient for users to place. The air source heat pump water heater in the present invention provides a new arrangement method of the air source heat pump water heater, which makes the internal structure arrangement of the air source heat pump water heater more reasonable and more compatible with the home environment. The air source heat pump water heater of the above patent Although the overall volume is reduced during use and installation, it is suitable for installation in a small area, but when the air source heat pump water heater of the above patent is used for a long time, because the air source heat pump water heater is used in the cold winter in the north, the evaporator will be damaged. Continuously absorbing the heat of the air, reducing the air temperature, the moisture in the air will condense on the fins of the evaporator to form water droplets, because the outdoor temperature is too low, the water droplets condensed on the evaporator are easy to frost, so Continuing to use the air source heat pump water heater in the case of frost will further increase the thickness of the ice, which will eventually cause the system to fail to operate normally. Therefore, it is necessary to clean up the frost on the surface of the evaporator. The above patent does not have a corresponding structure to deal with the frost. Secondly, after a long period of use, the heat exchange tubes inside the heat exchanger will accumulate a layer of scale, and the heat exchanger needs to be disassembled and cleaned. If the heat exchanger cannot be cleaned regularly, for the plate heat exchanger, it will be Burst, for the tube-and-tube heat exchanger, the inner tube will rupture, causing the entire heat pump water heater unit to lose its function.

Contents of the invention

The purpose of the present invention is to provide an air source heat pump water heater with built-in economizer in the water side heat exchanger to solve the following technical problems:

If the air source heat pump water heater is used for a long time, there will be frost on the surface of the evaporator. If it cannot be dealt with in time, the thickness of the ice will be further increased, resulting in the malfunction of the whole device. Secondly, the heat exchanger cannot be repaired very quickly. Disassemble and clean.

The purpose of the present invention can be achieved through the following technical solutions:

An air source heat pump water heater with a built-in economizer in the water side heat exchanger, including an installation base, which provides a support surface to facilitate the installation of the main body of the air source heat pump water heater, and the top of the installation base is fixedly connected with the air source heat pump The main body of the water heater. An evaporator assembly is arranged inside the main body of the air source heat pump water heater, and the refrigerant is cooled by the evaporator assembly to facilitate the subsequent circulation of the refrigerant. The evaporator assembly includes an air source heat pump water heater body fixedly connected The main body of the evaporator is fixedly connected with an evaporator tube assembly inside the evaporator body, and the evaporator tube assembly is arranged in a U shape, which increases the heat exchange contact area between the refrigerant and the icing, and achieves better deicing As a result, one side of the evaporator tube assembly is fixedly connected to a connection plate through a delivery pipe, and the connection plate and the inner sleeve are connected to each other, and the used refrigerant is collected and processed by using the connection plate and the delivery pipe, thereby realizing The circulation of the refrigerant avoids waste. The top of the evaporator tube assembly is fixedly connected with an input pipe, and one side of the input pipe is fixedly connected with a solenoid valve. The solenoid valve is used to control the discharge of the refrigerant. To perform defrosting treatment, one side of the evaporator main body is provided with a plurality of air inlets, and the bottom of the evaporator main body is fixedly connected with a drain pipe, and the melted water is discharged and collected through the set drain pipe;

The evaporator tube assembly includes an outer sleeve fixedly connected to the evaporator main body, an inner sleeve is fixedly connected to the inside of the outer sleeve, and there is a gap between the outer sleeve and the inner sleeve, and the inner wall of the outer sleeve is provided with multiple conveying holes, use the set of multiple conveying holes to transport the incoming refrigerant and further melt the frost on the surface of the inner casing, the inside of the outer casing is provided with a plurality of air intake slots, on the one hand The air intake slot is used to drain the outside air so as to absorb the heat in the outside air, and on the other hand, the air intake slot is used to discharge the melted water.

As a further solution of the present invention: the bottom of the main body of the air source heat pump water heater is fixedly connected with a fixed seat, and the top of the fixed seat is slidably connected with a heat exchange assembly through a sliding groove, and the heat exchange assembly is carried out through the fixed seat and the sliding groove. The sliding disassembly process facilitates subsequent maintenance and cleaning of the heat exchange components after long-term use, and the operation is simple and fast.

As a further solution of the present invention: the heat exchange assembly includes a heat exchanger body that is slidably connected to the sliding groove, and a heat exchange tube is fixedly connected to the inside of the heat exchanger body, and the heat exchange tube is also U-shaped, so that The setting can increase the contact area between the cold water and the high-temperature and high-pressure refrigerant, thereby improving the efficiency of heat exchange. Both ends of the heat exchange tube are fixedly connected with connecting components, and the connecting components are used to disassemble the heat exchanging components and the parts connected to them. Operation, simple structure and easy operation, the top of the heat exchanger body is fixedly connected with a connecting sleeve, the bottom of the heat exchanger body is fixedly connected with a sliding block, and one side of the heat exchanger body is fixed by a stop bolt It is connected with an access panel, and the access panel is used to perform maintenance operations on the heat exchange tubes inside the heat exchanger body, so as to avoid the aging of the heat exchange tubes due to the passage of time, and further prevent the aging of the heat exchange tubes from affecting the overall work.

As a further solution of the present invention: the connection assembly includes a first flange fixedly connected to the heat exchange tube, and a second flange is fixedly connected to one side of the first flange through fixing bolts.

As a further solution of the present invention: a liquid storage tank is fixedly connected to the inside of the main body of the air source heat pump water heater, and an expansion valve is fixedly connected to one side of the liquid storage tank, and the refrigerant after heat exchange is stored through the liquid storage tank , through the expansion valve to process the liquid refrigerant and transport it to the evaporator assembly for the next cycle operation.

As a further solution of the present invention: the main body of the air source heat pump water heater is rotatably connected to a rotating shaft, and the rotating shaft is connected to an axial flow fan through a bevel gear set, and multiple bevel gear sets are used to drive multiple shafts. The rotation of the flow fan draws in the outside air so as to use the outside air to perform heat exchange treatment on the refrigerant, so as to realize the purpose of energy saving. The inside of the main body of the air source heat pump water heater is fixedly connected with a partition.

As a further solution of the present invention: a motor is fixedly connected to the partition, and the output end of the motor is connected to the rotating shaft through a bevel gear set, a compressor is fixedly connected to the top of the partition, and a compressor is fixed to the bottom of the compressor. The compressor connecting pipe is fixedly connected, and the inner casing and the compressor connecting pipe are connected to each other, which is convenient to use high-temperature and high-pressure refrigerant to melt the frost on the surface of the inner casing, and the compressor connecting pipe is connected to the main body of the heat exchanger , through the compressor connecting pipe, the high-temperature and high-pressure refrigerant is transported to the water inside the main body of the heat exchanger and the water inside the heat exchange tube for heat exchange treatment.

As a further solution of the present invention: the main body of the air source heat pump water heater is fixedly connected with a water storage tank, and the upper and lower ends of the heat exchange tubes are connected with the water storage tank, and one side of the water storage tank is fixedly connected in sequence from top to bottom There is a water inlet and a water outlet, and both the water inlet and the water outlet run through the inner wall of the main body of the air source heat pump water heater.

As a further solution of the present invention: the top of the main body of the air source heat pump water heater is fixedly connected with a cooling port, one side of the main body of the air source heat pump water heater is fixedly connected with an air inlet, and one side of the main body of the air source heat pump water heater passes through The limit bolt is fixedly connected with an inspection door, and the parts inside the main body of the air source heat pump water heater are replaced and inspected by using the installed inspection door.

Beneficial effects of the present invention:

1. Through the set evaporator assembly, use the set U-shaped evaporating tube assembly to increase the speed of refrigerant gas-liquid conversion, and use the set delivery hole to transport the high-temperature and high-pressure refrigerant to the surface of the inner sleeve to clean the inner sleeve. The frosted part on the surface of the tube is exchanged for cold and heat, so as to melt the frost condensed on the surface of the inner sleeve, so as to prevent the overall device from being unable to operate normally due to the thick frosting thickness. The water is discharged to avoid the accumulation of frost and icing inside the outer casing, which will affect the subsequent work. Finally, the melted water can be separated through the outer casing and the inner casing, so as to facilitate the recycling of the refrigerant. deal with;

2. Through the set heat exchange assembly, use the cooperation of the fixed seat, the sliding groove and the heat exchange assembly to quickly disassemble and install the heat exchange assembly, so as to facilitate the cleaning of the heat exchange tubes inside the heat exchange assembly and avoid prolonged The accumulation of internal scale causes damage to the heat exchange tube, which further leads to the loss of function of the entire heat pump water heater unit.

Description of drawings

The present invention will be further described below in conjunction with the accompanying drawings.

Fig. 1 is a schematic diagram of the three-dimensional structure of the present invention;

Fig. 2 is a schematic diagram of a sectional structure of the present invention;

Fig. 3 is a schematic cross-sectional structure diagram of an evaporator assembly of the present invention;

Fig. 4 is a schematic cross-sectional structure diagram of the evaporation tube assembly of the present invention;

Fig. 5 is a schematic diagram of the enlarged structure at A in Fig. 3 of the present invention;

Fig. 6 is a schematic structural diagram of the heat exchange assembly of the present invention;

Fig. 7 is a schematic diagram of the structure of the connection assembly of the present invention.

In the figure: 1. Installation base; 2. Main body of air source heat pump water heater; 3. Evaporator assembly; 31. Evaporator main body; 32. Evaporation tube assembly; 321. Outer sleeve; 322. Inner sleeve; 324. Air intake slot; 33. Connecting plate; 34. Delivery pipe; 35. Input pipe; 36. Air inlet; 37. Drainage pipe; 4. Fixed seat; 5. Sliding groove; 6. Heat exchange component; 61 , main body of heat exchanger; 62, heat exchange tube; 63, connecting assembly; 631, first flange; 632, fixing bolt; 633, second flange; 64, connecting sleeve; 65, sliding block; 66 , Access panel; 7, Liquid storage tank; 8, Expansion valve; 9, Rotating shaft; 10, Bevel gear set; 11, Axial flow fan; 12, Partition plate; 13, Motor; 14, Compressor; 15, Compressor Connecting pipe; 16, solenoid valve; 17, water storage tank; 18, water inlet; 19, water outlet; 20, heat dissipation port; 21, suction port; 22, maintenance door.

Detailed ways

The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

Embodiment one

Please refer to Figures 1 to 5, the present invention is an air source heat pump water heater with a built-in economizer in the water side heat exchanger, including a mounting base 1, which provides a support surface to facilitate the main body of the air source heat pump water heater 2 for installation, the bottom of the main body 2 of the air source heat pump water heater is fixedly connected with the fixed seat 4, and the top of the fixed seat 4 is slidably connected with the heat exchange assembly 6 through the sliding groove 5, and the heat exchange assembly 6 is connected through the fixed seat 4 and the sliding groove 5 Carry out sliding disassembly processing to facilitate subsequent maintenance and cleaning of the heat exchange component 6 after long-term use. The operation is simple and quick. The heat dissipation port 20 is connected, one side of the main body 2 of the air source heat pump water heater is fixedly connected with a suction port 21, and one side of the main body 2 of the air source heat pump water heater is fixedly connected with an inspection door 22 through a limit bolt, and the inspection door 22 is used to The parts inside the main body 2 of the air source heat pump water heater are replaced and overhauled. The inside of the main body 2 of the air source heat pump water heater is fixedly connected with a water storage tank 17, and the upper and lower ends of the heat exchange tube 62 are connected to the water storage tank 17. The water storage tank 17 A water inlet 18 and a water outlet 19 are fixedly connected to one side from top to bottom in sequence, and the water inlet 18 and the water outlet 19 both penetrate the inner wall of the main body 2 of the air source heat pump water heater. The shaft 9 and the rotating shaft 9 are connected with an axial flow fan 11 through a bevel gear set 10, and a plurality of bevel gear sets 10 are used to drive the rotation of a plurality of axial flow fans 11 to inhale the outside air so as to utilize the outside air. Air is used to perform heat exchange treatment on the refrigerant to achieve the purpose of energy saving. The main body 2 of the air source heat pump water heater is fixedly connected with a partition 12, and the partition 12 is fixedly connected with a motor 13, and the output end of the motor 13 is connected through a bevel gear 10 is in transmission connection with the rotating shaft 9, the top of the partition 12 is fixedly connected with the compressor 14, and the bottom of the compressor 14 is fixedly connected with the compressor connecting pipe 15, and the inner casing 322 communicates with the compressor connecting pipe 15 for convenience. Use high-temperature and high-pressure refrigerant to melt the frost on the surface of the inner casing 322, and the compressor connecting pipe 15 communicates with the heat exchanger main body 61, and the high-temperature and high-pressure refrigerant is delivered to the heat exchanger main body through the compressor connecting pipe 15 The inside of 61 and the water inside the heat exchange tube 62 perform heat exchange treatment. The inside of the main body 2 of the air source heat pump water heater is fixedly connected with a liquid storage tank 7, and one side of the liquid storage tank 7 is fixedly connected with an expansion valve 8, through which the liquid storage tank 7 To store the refrigerant after heat exchange, the liquid refrigerant is processed and delivered to the evaporator assembly 3 through the expansion valve 8 for the next cycle operation. The evaporator assembly 3 is arranged inside the main body 2 of the air source heat pump water heater. The evaporator assembly 3 is used to cool the refrigerant to facilitate subsequent refrigerant circulation. The evaporator assembly 3 includes an evaporator body 31 fixedly connected to the air source heat pump water heater body 2. The evaporator body 31 is fixedly connected to an evaporation tube. Assembly 32, the evaporation tube assembly 32 is U-shaped The U-shaped setting increases the heat exchange contact area between the refrigerant and the icing, and achieves a better deicing effect. One side of the evaporating tube assembly 32 is fixedly connected with a connecting plate 33 through a delivery pipe 34, and the connecting plate 33 and The inner sleeves 322 are connected to each other, and the used refrigerant is collected and processed by the connecting plate 33 and the delivery pipe 34, thereby realizing the circulation of the refrigerant and avoiding waste. The top of the evaporator tube assembly 32 is fixedly connected with the input pipe 35 One side of the input pipe 35 is fixedly connected with a solenoid valve 16, and the solenoid valve 16 is used to control the discharge of the refrigerant, and further to perform defrosting treatment on the evaporator pipe assembly 32, and one side of the evaporator main body 31 is provided with a plurality of intake air The mouth 36, the bottom of the evaporator main body 31 is fixedly connected with a drain pipe 37, and the melted water is discharged and collected through the drain pipe 37;

The evaporator tube assembly 32 includes an outer sleeve 321 fixedly connected to the evaporator main body 31, an inner sleeve 322 is fixedly connected to the inside of the outer sleeve 321, and there is a gap between the outer sleeve 321 and the inner sleeve 322, and the inner wall of the outer sleeve 321 is opened There are a plurality of delivery holes 323, which are used to transport the incoming refrigerant to further melt the frost on the surface of the inner casing 322, and the outer casing 321 is provided with a plurality of air intake slots The mouth 324, on the one hand, uses the air intake slot 324 to drain the outside air to absorb the heat in the outside air, and on the other hand, uses the air intake slot 324 to discharge the melted water, and the evaporation The device assembly 3 uses the U-shaped evaporating tube assembly 32 to increase the gas-liquid conversion speed of the refrigerant, and uses the delivery hole 323 to deliver the high-temperature and high-pressure refrigerant to the surface of the inner sleeve 322 to clean the inner sleeve 322. The frosting part on the surface performs cold and heat exchange, so as to melt the frost condensed on the surface of the inner sleeve 322, so as to prevent the overall device from being unable to operate normally due to the thick frosting thickness, and then use the air inlet slot 324 to melt the The final water is discharged to avoid the accumulation of frost and ice inside the outer sleeve 321, which will affect the follow-up work. Finally, the melted water can be separated through the outer sleeve 321 and the inner sleeve 322, so as to facilitate the The refrigerant is recovered and recycled.

Embodiment two

Please refer to Figures 6 to 7, this embodiment includes all the structures in Embodiment 1. The present invention is an air source heat pump water heater with built-in economizer in the water side heat exchanger. The heat exchange assembly 6 includes the sliding groove 5 The heat exchanger main body 61 is slidingly connected, and the inside of the heat exchanger main body 61 is fixedly connected with a heat exchange tube 62, and the heat exchange tube 62 is also U-shaped. Such an arrangement can increase the contact area between the cold water and the high-temperature and high-pressure refrigerant. In order to improve the efficiency of heat exchange, both ends of the heat exchange tube 62 are fixedly connected with a connection assembly 63, the connection assembly 63 includes a first flange 631 fixedly connected with the heat exchange tube 62, one side of the first flange 631 The second flange 633 is fixedly connected by the fixing bolt 632, and the connecting assembly 63 is used to disassemble the heat exchange assembly 6 and the parts connected to it. The structure is simple and easy to operate. The top of the heat exchanger main body 61 is fixedly connected with a connecting sleeve. 64. The bottom of the heat exchanger main body 61 is fixedly connected with a sliding block 65, and one side of the heat exchanger main body 61 is fixedly connected with an inspection plate 66 through a stopper, and the inspection plate 66 is used to exchange heat inside the heat exchanger main body 61. The maintenance operation of the tube 62 can avoid the aging of the heat exchange tube 62 due to the passage of time, and further prevent the aging of the heat exchange tube 62 from affecting the overall work.

The working principle of the present invention: first use the water inlet 18 to discharge the required heated water into the water storage tank 17, then start the compressor 14 and the separator 12, and the compressor 14 will compress the refrigerant to form a high-temperature and high-pressure gaseous refrigerant. The high-pressure gaseous state is discharged into the heat exchanger main body 61 through the compressor connecting pipe 15, and the cold water in the heat exchange pipe 62 is subjected to heat exchange treatment, so that the cold water is heated and then circulated to the water storage tank 17 for storage. The heat-treated cooled refrigerant continues to become liquid under the action of pressure, and is further stored by the liquid storage tank 7. The liquid refrigerant enters the evaporator assembly 3 through the action of the expansion valve 8. Because the evaporator assembly 3 The pressure drops suddenly, so the liquid refrigerant evaporates quickly again and turns into a gaseous state. Under the action of the motor 13, the action of the bevel gear set 10 is used to drive the work of multiple rotating shafts 9, so as to transport the external air to the evaporator. In the component 3, the air input from the outside is absorbed by the refrigerant in the evaporator component 3, and under the action of the compressor 14, the next cycle works;

After working for a long time, the surface of the inner casing 322 will form a certain amount of frost under the action of the refrigerant. After repeated cycles, the frost formed by the refrigerant will become thicker and ice will be formed. At this time, open the solenoid valve 16 and use the input pipe 35 The high-temperature and high-pressure refrigerant generated by the compressor 14 is transported into the delivery hole 323 to melt the frost formed on the surface of the inner sleeve 322, and the melted water will drop to the bottom of the evaporator main body 31 through the intake slot 324 and pass through the drain pipe 37 is discharged, and the exchanged refrigerant flows into the inner casing 322 through the action of the connection plate 33 and the delivery pipe 34 for recycling;

After a long period of work, it is necessary to perform maintenance and cleaning operations on the heat exchange assembly 6 inside the main body 2 of the air source heat pump water heater. The assembly 6 is taken out as a whole by the action of the sliding block 65 and the sliding groove 5, and then the stopper on the inspection plate 66 can be removed to clean the heat exchange tubes 62 inside the heat exchanger main body 61. After the cleaning is completed, use the first A flange 631 and fixing bolts 632 can be used to reinstall the heat exchange assembly 6 .

An embodiment of the present invention has been described in detail above, but the content described is only a preferred embodiment of the present invention, and cannot be considered as limiting the implementation scope of the present invention. All equivalent changes and improvements made according to the application scope of the present invention shall still belong to the scope covered by the patent of the present invention.

Claims (9)

1. An air source heat pump water heater with an economizer arranged in a water side heat exchanger comprises an installation base, wherein the top of the installation base is fixedly connected with an air source heat pump water heater main body;

the evaporator tube assembly comprises an outer sleeve fixedly connected with the evaporator main body, an inner sleeve is fixedly connected inside the outer sleeve, a plurality of conveying holes are formed in the inner wall of the outer sleeve, and a plurality of air inlet notches are formed in the outer sleeve.

2. The air source heat pump water heater with the economizer arranged in the water side heat exchanger is characterized in that a fixing seat is fixedly connected to the bottom of the main body of the air source heat pump water heater, and a heat exchange assembly is connected to the top of the fixing seat in a sliding mode through a sliding groove.

3. The air source heat pump water heater of the water side heat exchanger built-in economizer is characterized in that the heat exchange assembly comprises a heat exchanger body in sliding connection with a sliding groove, a heat exchange tube is fixedly connected inside the heat exchanger body, connecting assemblies are fixedly connected to two ends of the heat exchange tube, a connecting sleeve is fixedly connected to the top of the heat exchanger body, a sliding block is fixedly connected to the bottom of the heat exchanger body, and an overhaul plate is fixedly connected to one side of the heat exchanger body through a limiting bolt.

4. The air source heat pump water heater of the water side heat exchanger built-in economizer of claim 3, wherein the connecting assembly comprises a first flange fixedly connected with the heat exchange tube, and a second flange is fixedly connected with one side of the first flange through a fixing bolt.

5. The air source heat pump water heater with the economizer in the water side heat exchanger as claimed in claim 2, characterized in that a liquid storage tank is fixedly connected inside the main body of the air source heat pump water heater, and an expansion valve is fixedly connected to one side of the liquid storage tank.

6. The air source heat pump water heater of the water side heat exchanger built-in economizer according to claim 5, characterized in that a rotating shaft is rotatably connected to the inside of the air source heat pump water heater main body, an axial flow fan is connected to the rotating shaft through a bevel gear set in a transmission manner, and a partition plate is fixedly connected to the inside of the air source heat pump water heater main body.

7. The air source heat pump water heater of the water side heat exchanger built-in economizer according to claim 6, characterized in that a motor is fixedly connected to the partition plate, an output end of the motor is in transmission connection with a rotating shaft through a bevel gear set, a compressor is fixedly connected to the top of the partition plate, and a compressor connecting pipe is fixedly connected to the bottom of the compressor.

8. The air source heat pump water heater of the water side heat exchanger built-in economizer according to claim 6, characterized in that a water storage tank is fixedly connected to the inside of the main body of the air source heat pump water heater, and a water inlet and a water outlet are fixedly connected to one side of the water storage tank from top to bottom in sequence.

9. The air source heat pump water heater of the water side heat exchanger built-in economizer according to claim 8, characterized in that a heat dissipation port is fixedly connected to the top of the air source heat pump water heater main body, an air suction port is fixedly connected to one side of the air source heat pump water heater main body, and an access door is fixedly connected to one side of the air source heat pump water heater main body through a limit bolt.

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