Direct cold supply system for buried pipe

Abstract

The utility model relates to the field of heating ventilation air conditioners, in particular to a buried pipe direct cooling system. Comprising a buried pipe cold supply system and a storage cold supply system, and the buried pipe cold supply system comprises a first buried pipe, a frequency conversion circulating water pump, a water segregator, a first tail end radiation device, a water collector and a first water pump; the storage cold supply system comprises a second buried pipe, a heat pump unit, a cooling tower, a first energy storage water tank, a second tail end radiation device, a second energy storage water tank and a humidifying device, and sensing control is achieved through a temperature and humidity sensor and a digital controller. Multiple cold supply choices are provided for users, energy is saved, system energy consumption can be reduced, and the service life is prolonged.

Description

Technical Field

[0001] The utility model relates to the field of heating, ventilation and air conditioning, and particularly to a direct ground pipe cooling system. Background Technique

[0002] With the increasing popularity of air conditioners, the building energy consumption has increased rapidly, and the issues of energy and environmental protection have increasingly become the focus of people's attention. As an efficient and environmentally friendly renewable energy utilization system, the ground source heat pump air conditioning system provides a new development direction for building energy conservation. Currently, the ground source heat pump system relies on the ground source heat pump unit for heating and cooling, and then transports hot water and cold water to the end users. In the initial and final stages of cooling, when the building cooling load demand is relatively small, the load rate of the unit is relatively low, resulting in low efficiency and frequent start-stop operations, which affect the service life of the unit.

[0003] Therefore, in view of the deficiencies of the ground source heat pump air conditioning system, designing a composite cooling system that can not only meet the cooling demand in the initial and final stages of cooling, but also achieve efficient cooling, save energy and have multiple cooling methods has become a common demand of people. Content of the Utility Model

[0004] Aiming at the deficiencies of the existing technology, the purpose of the utility model is to provide a direct ground pipe cooling system to solve the problems raised in the above background technique. The utility model can achieve efficient cooling, meet the cooling needs, save energy, and can also realize multiple mode cooling.

[0005] To achieve the above purpose, the utility model adopts the following technical solutions: The utility model provides a direct ground pipe cooling system, including a ground pipe cooling system and a storage cooling system. The ground pipe cooling system includes a first ground pipe, the first ground pipe includes a first water outlet pipe and a first water return pipe. The first water outlet pipe is connected to the inlet of a variable frequency circulating water pump, the outlet of the variable frequency circulating water pump is connected to the inlet of a water distributor, the outlet of the water distributor is connected to the inlet of a first terminal radiation device, the outlet of the first terminal radiation device is connected to the inlet of a water collector, the outlet of the water collector is connected to the inlet of a first water pump, and the outlet of the first water pump is connected to the first water return pipe;

[0006] The storage cooling system includes a second ground pipe, the second ground pipe includes a second water outlet pipe and a second water return pipe. The second water outlet pipe and the second water return pipe are respectively connected to the cold source inlet and outlet of a heat pump unit. The first cold water delivery port of the heat pump unit is sequentially connected to a cooling tower, a first energy storage water tank and a second terminal radiation device. The second cold water delivery port of the heat pump unit is sequentially connected to a second energy storage water tank and a humidifying device. A first electric control valve is arranged between the heat pump unit and the cooling tower, and a second electric control valve is arranged between the heat pump unit and the second energy storage water tank;

[0007] The humidifying device, the first terminal radiation device, and the second terminal radiation device are all connected to the temperature and humidity sensor;

[0008] The variable frequency circulating water pump, the heat pump unit, the first electric control valve, the second electric control valve, the humidifying device, the second terminal radiation device, and the temperature and humidity sensor are all connected to the digital controller.

[0009] Preferably, the first terminal radiation device is a radiant floor.

[0010] Preferably, the second terminal radiation device is a fresh air air-conditioning system.

[0011] Preferably, the humidifying device uses a cold fog humidifier.

[0012] Preferably, the cooling tower uses a countercurrent cooling tower.

[0013] Preferably, the number of the first water outlet pipe and the second water outlet pipe is four, and the number of the first water return pipe and the second water return pipe is two.

[0014] Compared with the prior art, the advantages and positive effects of the present utility model are as follows:

[0015] The present utility model provides a direct ground-coupled cooling system, which realizes multiple cooling modes through two sets of cooling systems, provides multiple cooling options for users. In the initial stage and the final stage of cooling, the ground-coupled cooling system is used for direct cooling, which can save energy, reduce system energy consumption, and extend the service life. The main control strategy of the ground-coupled cooling system is continuous operation, that is, the variable frequency circulating water pump runs continuously for 24 hours. According to the change of the terminal load, the flow rate is changed and frequency conversion adjustment is carried out to achieve the effect of cold storage. The terminal uses a radiant floor to exchange heat with objects such as surrounding walls and desktops through radiation, and utilizes the advantage of building body energy storage to store the cold quantity for offsetting the sensible heat load during the day. When the ground-coupled cooling system is not sufficient to offset the sensible heat load, the storage cooling system is started. The storage cooling system produces low-temperature water by the heat pump unit. After freezing, the produced chilled water is stored in the energy storage water tank for cooling the fresh air. The storage cooling system can store chilled water in advance for humidifying and cooling the cooled room. Therefore, this cooling system can provide three cooling modes: direct cooling by the ground-coupled cooling system, cooling by the ground-coupled cooling system plus humidifying and providing a small amount of cooling by the storage cooling system, and cooling by the ground-coupled cooling system plus cooling by the storage cooling system. Description of the Drawings

[0016] To more clearly illustrate the technical solutions of the embodiments of the present invention, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the drawings in the following description are some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0017] Figure 1 The structural schematic diagram of a direct ground pipe cooling supply system provided by an embodiment of the present invention;

[0018] The reference numerals in the figure respectively represent:

[0019] 1. First water outlet pipe; 2. Variable frequency circulating water pump; 3. Water distributor; 4. First terminal radiation device; 5. Water collector; 6. First water pump; 7. First return water pipe; 8. Second water outlet pipe; 9. Heat pump unit; 10. Cooling tower; 11. First energy storage water tank; 12. Second terminal radiation device; 13. Humidifying device; 14. Second energy storage water tank; 15. Second return water pipe; 16. First electric control valve; 17. Second electric control valve; 18. Temperature and humidity sensor; 19. Digital controller; 20. Second ground pipe; 21. First ground pipe; 22. Cooling supply room. Detailed implementation manners

[0020] In order to more clearly understand the above objects, features and advantages of the present invention, the following will further describe the present invention with reference to the drawings and embodiments. It should be noted that, without conflict, the embodiments of the present application and the features in the embodiments can be combined with each other.

[0021] In the following description, many specific details are set forth to fully understand the present invention. However, the present invention can also be implemented in other ways different from those described herein. Therefore, the present invention is not limited by the specific embodiments disclosed in the following specification.

[0022] The accompanying drawing shows a specific embodiment of the present utility model. This embodiment aims to provide a direct ground pipe cooling system. To this end, the direct ground pipe cooling system provided in this embodiment includes a ground pipe cooling system and a cold storage cooling system. The ground pipe cooling system includes a first ground pipe 21, and the first ground pipe 21 includes a first water outlet pipe 1 and a first water return pipe 7. The first water outlet pipe 1 is connected to the water inlet of a variable frequency circulating water pump 2, the water outlet of the variable frequency circulating water pump 2 is connected to the water inlet of a water distributor 3, the water outlet of the water distributor 3 is connected to the water inlet of a first terminal radiation device 4, the water outlet of the first terminal radiation device 4 is connected to the water inlet of a water collector 5, the water outlet of the water collector 5 is connected to the water inlet of a first water pump 6, and the water outlet of the first water pump 6 is connected to the first water return pipe 7. The cold storage cooling system includes a second ground pipe 20, and the second ground pipe 20 includes a second water outlet pipe 8 and a second water return pipe 15. The second water outlet pipe 8 and the second water return pipe 15 are respectively connected to the cold source inlet and outlet of a heat pump unit 9. The first cold water delivery port of the heat pump unit 9 is sequentially connected to a cooling tower 10, a first energy storage water tank 11, and a second terminal radiation device 12. The second cold water delivery port of the heat pump unit 9 is sequentially connected to a second energy storage water tank 14 and a humidifying device 13. A first electric control valve 16 is arranged between the heat pump unit 9 and the cooling tower 10, and a second electric control valve 17 is arranged between the heat pump unit 9 and the second energy storage water tank 14. The humidifying device 13, the first terminal radiation device 4, and the second terminal radiation device 12 are all connected to a temperature and humidity sensor 18. The variable frequency circulating water pump 2, the heat pump unit 9, the first electric control valve 16, the second electric control valve 17, the humidifying device 13, the second terminal radiation device 12, and the temperature and humidity sensor 18 are all connected to a digital controller 19.

[0023] The working principle of the underfloor pipe direct cooling system provided by the embodiment of the utility model is as follows: In the initial and final stages of heating, the underfloor pipe cooling system provides cooling. Specifically, the variable-frequency circulating water pump 2 extracts underground cold water through the first outlet pipe 1 of the first underfloor pipe 21, and then transports the underground cold water to the users of the first terminal radiation device 4 through the water distributor 3. After the underground cold water releases its cooling capacity, it is discharged from the first terminal radiation device 4, and is discharged through the first return pipe 7 of the first underfloor pipe 21 under the action of the water collector 5 and the first water pump 6. A temperature and humidity sensor 18 connected to the digital controller 19 is installed in the cooling room 22 to sense the temperature of the cooling room 22 in real time, and the supply of underground cold water is controlled in real time through the variable-frequency circulating water pump 2 connected to the digital controller 19, changing the flow rate at any time and adjusting frequency conversion. When the underfloor pipe cooling system is insufficient to bear the cooling load, the energy storage cooling system is started. The energy storage cooling system includes a humidification and small amount of cooling mode and a sufficient cooling mode. When the temperature and humidity sensor 18 in the cooling room 22 senses that the humidity in the cooling room 22 is insufficient and a large amount of cooling energy does not need to be provided, the digital controller 19 keeps the first electric control valve 16 closed, opens the second electric control valve 17, and at the same time starts the heat pump unit 9 and the humidifying device 13. The heat pump unit 9 extracts and makes cold water from the second outlet pipe 8 of the second underfloor pipe 20 and stores it in the second energy storage water tank 14, and humidifies the cooling room 22 through the humidifying device 13 and provides a small amount of cooling energy. When the temperature and humidity sensor 18 in the cooling room 22 senses that the temperature in the cooling room 22 has increased and a large amount of cooling energy needs to be supplied, the digital controller 19 closes the second electric control valve 17, opens the first electric control valve 16, starts the heat pump unit 9, the cooling tower 10 and the second terminal radiation device 12. The heat pump unit 9 extracts underground cold water through the second outlet pipe 8 of the second underfloor pipe 20, extracts cooling energy to produce low-temperature water, and the low-temperature water is cooled by the cooling tower 10 to make chilled water. Then the chilled water is stored in the first energy storage water tank 11, and the cooling room 22 is cooled through the second terminal radiation device 12. The energy storage cooling system can produce chilled water in advance and store it for cooling when needed, so as to avoid the peak electricity consumption and refrigeration periods. The utility model has three cooling modes. One is the underfloor pipe cooling system for independent cooling, which is used in the period with low cooling demand, saving energy and reducing system energy consumption. The second is the underfloor pipe cooling system for cooling plus the energy storage cooling system for humidification and providing a small amount of cooling, which can be used in the situation where the cooling demand is not particularly high but the weather is dry and the humidity is insufficient. The third is the underfloor pipe cooling system for cooling plus the energy storage cooling system for cooling, which is used to fully guarantee the cooling efficiency of the cooling room.

[0024] In order to make full use of the cooling effect of the underground cold water of the cooling system and improve the cooling efficiency, the first terminal radiation device 4 adopts a radiant floor.

[0025] In order to better exert the cooling function of the cooling system, the second terminal radiation device 12 adopts a fresh air air-conditioning system.

[0026] In order to better provide a better humidifying effect, the humidifying device 13 adopts a cold fog humidifier.

[0027] In order to better dehumidify and prevent freezing, the cooling tower 10 adopts a countercurrent cooling tower.

[0028] In order to improve the extraction and discharge efficiency of groundwater, the number of the first water outlet pipe 1 and the second water outlet pipe 8 is four, and the number of the first water return pipe 7 and the second water return pipe 15 is two.

[0029] The above are only the preferred embodiments of the present invention, and are not intended to limit the present invention in other forms. Any person skilled in the art may use the technical content disclosed above to make changes or modifications into equivalent embodiments with equivalent changes and apply them to other fields. However, as long as it does not depart from the technical solution content of the present invention, any simple modification, equivalent change and modification made to the above embodiments according to the technical essence of the present invention still fall within the protection scope of the technical solution of the present invention.

Claims

1. A buried pipe direct cooling system, characterized in that: The invention comprises a buried pipe cooling system and a storage cooling system, wherein the buried pipe cooling system comprises a first buried pipe (21), the first buried pipe (21) comprises a first water outlet pipe (1) and a first water return pipe (7), the first water outlet pipe (1) is connected to a water inlet of a variable frequency circulating water pump (2), the water outlet of the variable frequency circulating water pump (2) is connected to a water inlet of a water distributor (3), the water outlet of the water distributor (3) is connected to a water inlet of a first terminal radiation device (4), the water outlet of the first terminal radiation device (4) is connected to a water inlet of a water collector (5), the water outlet of the water collector (5) is connected to a water inlet of a first water pump (6), and the water outlet of the first water pump (6) is connected to a first water return pipe (7); The storage cooling system comprises a second buried pipe (20), the second buried pipe (20) comprises a second water outlet pipe (8) and a second water return pipe (15), the second water outlet pipe (8) and the second water return pipe (15) are respectively connected to the cold source inlet and outlet of the heat pump unit (9), the first cold water delivery port of the heat pump unit (9) is sequentially connected to the cooling tower (10), the first energy storage water tank (11) and the second terminal radiation device (12), the second cold water delivery port of the heat pump unit (9) is sequentially connected to the second energy storage water tank (14) and the humidifying device (13), a first electric regulating valve (16) is provided between the heat pump unit (9) and the cooling tower (10), and a second electric regulating valve (17) is provided between the heat pump unit (9) and the second energy storage water tank (14); The humidifying device (13), the first end radiation device (4) and the second end radiation device (12) are all connected to a temperature and humidity sensor (18); The variable frequency circulating water pump (2), the heat pump unit (9), the first electric regulating valve (16), the second electric regulating valve (17), the humidifying device (13), the second terminal radiation device (12) and the temperature and humidity sensor (18) are all connected to the digital controller (19).

2. The underground pipe direct cooling system according to claim 1, characterized in that: The first terminal radiation device (4) is a radiation floor.

3. The underground pipe direct cooling system according to claim 1, characterized in that: The second terminal radiation device (12) is a fresh air air conditioning system.

4. The underground pipe direct cooling system according to claim 1, characterized in that: The humidifying device (13) adopts a cold mist humidifier.

5. The underground pipe direct cooling system according to claim 1, characterized in that: The cooling tower (10) is a counter-flow cooling tower.

6. The underground pipe direct cooling system according to claim 1, characterized in that: The number of the first water outlet pipe (1) and the second water outlet pipe (8) is four, and the number of the first water return pipe (7) and the second water return pipe (15) is two.

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