Air-tight seal single-well energy storage central air-conditioning heat exchange device

Abstract

The utility model relates to the technical field of central air conditioners, and discloses an air-tight seal single-well energy storage central air conditioner heat exchange device which comprises a single-well mechanism, the single-well mechanism comprises a well mouth, a well wall is arranged at the bottom of the well mouth, a well bottom is arranged at the bottom of the well wall, and a covering and sealing mechanism is arranged on the well mouth; a fixing plate is fixedly installed on the inner wall of the well wall, a heat exchange mechanism is arranged on the fixing plate, and a secondary refrigerant circulating mechanism and an air sealing mechanism are arranged above the well mouth. Compared with the prior art, the system has the following advantages and effects that by arranging the heat exchange mechanism, the energy storage and exchange efficiency can be improved, so that the energy consumption of the central air-conditioning system is reduced, the purposes of energy conservation and emission reduction are achieved, the mode of utilizing underground relatively stable low-temperature heat energy can be achieved, the operation cost of the system is remarkably reduced, and the energy conservation and emission reduction are achieved. And by means of the airtight sealing mechanism, the purposes that the interior of the well is kept in a stable pressure state, and underground water seepage is effectively prevented can be achieved.

Description

Technical Field

[0001] This application relates to the field of central air conditioning technology, and in particular to a gas-tight single-well energy storage central air conditioning heat exchange device. Background Technology

[0002] The existing energy-saving water circulation central air conditioning system that utilizes groundwater uses well water that is naturally cooled by the ground temperature to a temperature of 18°C-20°C. The groundwater pumped by the water pump passes through the heat exchanger of the central air conditioning system and flows into the return water well through pipes. The water in the return water well flows back underground through natural infiltration for natural cooling.

[0003] A search revealed a patent document with authorization announcement number CN208750997U, which discloses an airtight single-well energy storage central air conditioning heat exchange system. This system utilizes multiple sealing devices within the energy storage well to create multiple seepage heat exchange spaces. Circulating water, after heat exchange, is pumped into these spaces and pressurized to seep into the surrounding soil, causing heat exchange between the water and the soil, thus storing energy within the soil. This system, using soil as an energy storage material and a circulating water system to store energy underground, achieves energy savings of over 50% compared to traditional water-cooled and air-cooled air conditioning systems, significantly reducing operating costs. Furthermore, it overcomes the drawbacks of current well-source heat pump air conditioning systems, such as the inability to 100% reinject well water, groundwater level decline, groundwater waste, and high costs.

[0004] In practical use, it was found that the heat exchange efficiency and energy storage performance of existing devices are low, which is not conducive to energy conservation and emission reduction, and is not conducive to the promotion and application of these devices. Therefore, we proposed an airtight single-well energy storage central air conditioning heat exchange device to solve the above problems. Utility Model Content

[0005] The purpose of this application is to address the shortcomings of existing technologies, namely, the low heat exchange efficiency and energy storage performance of existing devices, which are not conducive to energy conservation and emission reduction, and are not conducive to the promotion and application of these devices. Therefore, this application proposes an airtight single-well energy storage central air conditioning heat exchange device.

[0006] The above-mentioned technical objective of this application is achieved through the following technical solution: a gas-tight single-well energy storage central air conditioning heat exchange device, including a single-well mechanism, the single-well mechanism including a wellhead, a well wall at the bottom of the wellhead, a well bottom at the bottom of the well wall, and a capping mechanism on the wellhead; a fixing plate is fixedly installed on the inner wall of the well wall, a heat exchange mechanism is installed on the fixing plate, and a refrigerant circulation mechanism and a gas-tight mechanism are installed above the wellhead.

[0007] A further feature of this application is that the sealing mechanism includes a well cover and a sealing ring, with the well cover provided on the well opening and the sealing ring provided at the bottom of the well cover, the sealing ring being adapted to the inner wall of the well.

[0008] By adopting the above technical solution and by setting a sealing ring, the sealing ring is made to fit tightly against the inner wall of the well, which can prevent external impurities and moisture from entering and gas from leaking into the well, thus ensuring the sealing and stability of the system.

[0009] A further feature of this application is that the heat exchange mechanism includes a plate heat exchanger and a U-shaped heat exchange tube. A plate heat exchanger is provided on the left side of the wellhead, and a U-shaped heat exchange tube is inserted through the fixed plate. The end of the U-shaped heat exchange tube passes through the well cover.

[0010] By adopting the above technical solution and by setting up a heat exchange mechanism, the refrigerant flowing out of the U-shaped heat exchange tube can enter the plate heat exchanger. Here, the refrigerant transfers the heat it obtains or releases from the soil or groundwater to the refrigerant or other refrigerants in the central air conditioning system, thereby achieving the purpose of energy transfer for the entire central air conditioning system.

[0011] The further configuration of this application is as follows: the refrigerant circulation mechanism includes a refrigerant pump and a refrigerant storage tank. A refrigerant storage tank and a refrigerant pump are provided on the top of the manhole cover. The refrigerant storage tank is located to the right of the refrigerant pump. The refrigerant storage tank and the refrigerant pump are adapted to each other. The two ends of the U-shaped heat exchange tube are respectively connected to the inlet and outlet pipes of the refrigerant pump. The plate heat exchanger is connected to the inlet and outlet pipes of the refrigerant pump.

[0012] By adopting the above technical solution and by setting up a refrigerant circulation mechanism, the refrigerant pump can draw the refrigerant from the storage tank and allow it to enter the U-shaped heat exchange tube for cooling; in heating mode, the refrigerant can also enter the U-shaped heat exchange tube to absorb the heat stored underground through the refrigerant pump.

[0013] A further provision of this application is that the gas sealing mechanism includes a high-pressure inert gas tank, a vent pipe and an injection port. The high-pressure inert gas tank is located on the right side of the wellhead, and the vent pipe is located on the left side of the high-pressure inert gas tank. The bottom end of the vent pipe extends to the bottom of the corresponding fixing plate, and an injection port is located on the left side of the vent pipe.

[0014] By adopting the above technical solution and by setting up an air-sealing mechanism, the inert gas in the high-pressure inert gas tank can be transported to the injection hole through the vent pipe and injected into the well, thereby achieving the purpose of preventing groundwater from seeping in.

[0015] A further feature of this application is that a gas flow regulating valve and a pressure sensor are provided on the vent pipe, with the gas flow regulating valve and the pressure sensor located outside the wellhead, and the gas flow regulating valve located to the right of the pressure sensor.

[0016] By adopting the above technical solution, and by setting up a flow regulating valve and a pressure sensor, the gas flow rate can be adjusted according to the well pressure information monitored by the pressure sensor. This can maintain the well pressure within a certain range. When the pressure is lower than the set value, the gas flow regulating valve opens to inject gas and increase the pressure. When the pressure is higher than the set value, the regulating valve closes to reduce the amount of gas injected, thereby preventing groundwater from seeping into the heat exchange tube.

[0017] A further feature of this application is that a temperature sensor is provided on the U-shaped heat exchange tube, and the temperature sensor is located between the well cover and the corresponding fixing plate.

[0018] By adopting the above technical solution and installing a temperature sensor, the temperature of the refrigerant inside the U-shaped heat exchange tube can be monitored in real time. By accurately measuring the temperature of the refrigerant, it can provide the system with temperature data of the refrigerant during the heat exchange process, reflecting the temperature change of the refrigerant when exchanging heat with soil or groundwater.

[0019] A further feature of this application is that a multi-layer composite filtration device is provided on the bottom of the well, the multi-layer composite filtration device including an inner filter screen and an outer filter screen, both of which are made of stainless steel.

[0020] By adopting the above technical solution and by setting up a filtration device, impurities can be blocked from entering the refrigerant circulation system through the inner and outer filter screens, thereby achieving the purpose of preventing impurities from entering the refrigerant circulation system and affecting the system stability.

[0021] The beneficial effects of this application are:

[0022] By exchanging heat with the surrounding soil or groundwater through a single-well mechanism, heat is stored and extracted in different modes, reducing dependence on external energy. Through the efficient circulation of refrigerant in U-shaped heat exchange tubes and plate heat exchangers, the energy storage and exchange efficiency can be improved, thereby reducing the energy consumption of the central air conditioning system, achieving energy conservation and emission reduction, and further realizing the use of relatively stable low-temperature thermal energy underground, significantly reducing the system's operating costs and improving energy utilization efficiency.

[0023] Through the coordinated operation of components such as high-pressure inert gas tanks, vent pipes, and injection ports, as well as the cooperation of gas flow regulating valves and pressure sensors, a stable pressure state can be maintained inside the well, effectively preventing groundwater infiltration. At the same time, the multi-layer composite filtration device at the bottom of the well can block impurities from entering the refrigerant circulation system, avoiding equipment damage and pipeline blockage caused by groundwater corrosion and impurity accumulation, greatly extending the service life of the equipment, and ensuring long-term stable operation of the system. Attached Figure Description

[0024] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0025] Figure 1 This is a three-dimensional structural schematic diagram of the gas-tight single-well energy storage central air conditioning heat exchange device of this application;

[0026] Figure 2 This is a schematic diagram of the internal structure of the well wall of the gas-tight single-well energy storage central air conditioning heat exchange device of this application;

[0027] Figure 3 This is a schematic diagram of the main view cross-sectional structure of the gas-tight single-well energy storage central air conditioning heat exchange device of this application;

[0028] Figure 4 This is a schematic diagram of structure A of the gas-tight single-well energy storage central air conditioning heat exchange device of this application.

[0029] In the diagram: 1. Wellhead; 2. Well wall; 201. Fixing plate; 202. Refrigerant pump; 203. U-shaped heat exchange tube; 204. Refrigerant storage tank; 3. Well bottom; 4. Well cover; 5. Plate heat exchanger; 6. High-pressure inert gas tank; 601. Vent pipe; 602. Injection port; 603. Gas flow regulating valve; 604. Pressure sensor; 7. Temperature sensor; 8. Sealing ring. Detailed Implementation

[0030] The technical solution of this application will be clearly and completely described below with reference to specific embodiments. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0031] See Figures 1-4 This application provides a gas-tight single-well energy storage central air conditioning heat exchange device, including a single-well mechanism. The single-well mechanism includes a wellhead 1, a well wall 2 at the bottom of the wellhead 1, a well bottom 3 at the bottom of the well wall 2, and a cover sealing mechanism on the wellhead 1. A fixing plate 201 is fixedly installed on the inner wall of the well wall 2, and a heat exchange mechanism is installed on the fixing plate 201. A refrigerant circulation mechanism and a gas-tight mechanism are installed above the wellhead 1.

[0032] Specifically, the sealing mechanism includes a well cover 4 and a sealing ring 8. The well cover 4 is installed on the well opening 1, and the sealing ring 8 is installed at the bottom of the well cover 4. The sealing ring 8 is adapted to the inner wall of the well wall 2.

[0033] Specifically, the heat exchange mechanism includes a plate heat exchanger 5 and a U-shaped heat exchange tube 203. The plate heat exchanger 5 is installed on the left side of the wellhead 1, and the U-shaped heat exchange tube 203 is inserted through the fixed plate 201. The end of the U-shaped heat exchange tube 203 passes through the well cover 4.

[0034] Specifically, the refrigerant circulation mechanism includes a refrigerant pump 202 and a refrigerant storage tank 204. The top of the manhole cover 4 is equipped with a refrigerant storage tank 204 and a refrigerant pump 202. The refrigerant storage tank 204 is located to the right of the refrigerant pump 202. The refrigerant storage tank 204 is compatible with the refrigerant pump 202. The two ends of the U-shaped heat exchange tube 203 are connected to the inlet and outlet pipes of the refrigerant pump 202, respectively. The plate heat exchanger 5 is connected to the inlet and outlet pipes of the refrigerant pump 202.

[0035] Specifically, the gas sealing mechanism includes a high-pressure inert gas tank 6, a vent pipe 601, and an injection port 602. The high-pressure inert gas tank 6 is located on the right side of the wellhead 1, and the vent pipe 601 is located on the left side of the high-pressure inert gas tank 6. The bottom end of the vent pipe 601 extends to the bottom of the corresponding fixing plate 201, and the injection port 602 is located on the left side of the vent pipe 601.

[0036] Specifically, a gas flow regulating valve 603 and a pressure sensor 604 are installed on the vent pipe 601. The gas flow regulating valve 603 and the pressure sensor 604 are located outside the wellhead 1, with the gas flow regulating valve 603 located to the right of the pressure sensor 604.

[0037] Specifically, a temperature sensor 7 is installed on the U-shaped heat exchange tube 203, and the temperature sensor 7 is located between the manhole cover 4 and the corresponding fixing plate 201.

[0038] Specifically, a multi-layer composite filtration device is installed at the bottom of the well (3). The multi-layer composite filtration device includes an inner filter screen and an outer filter screen, both of which are made of stainless steel.

[0039] In this application, during operation, in refrigeration mode, the refrigerant is stored in the refrigerant storage tank 204. The refrigerant pump 202 is started to draw the refrigerant from the refrigerant storage tank 204 and flow it through the U-shaped heat exchange tube 203. As the refrigerant flows in the U-shaped heat exchange tube 203, heat is transferred from the refrigerant to the soil or groundwater in the well, thereby achieving the purpose of cooling the refrigerant.

[0040] Temperature sensor 7 monitors the temperature of the refrigerant in real time and provides feedback. After the refrigerant completes heat exchange, it is driven by refrigerant pump 202 to flow into plate heat exchanger 5. In plate heat exchanger 5, the low-temperature refrigerant exchanges heat with the refrigerant of the central air conditioning system. The refrigerant of the central air conditioning system absorbs heat from the refrigerant and evaporates in the evaporator. After the refrigerant transfers heat to the refrigerant, its own temperature rises and it returns to the refrigerant storage tank 204 to complete a refrigeration cycle.

[0041] In heating mode, the refrigerant in the refrigerant storage tank 204 flows through the U-shaped heat exchange tube 203 under the drive of the refrigerant pump 202. The temperature of the refrigerant is relatively low while the temperature of the soil or groundwater in the well is relatively high. Heat is transferred from the soil or groundwater in the well to the refrigerant, causing it to heat up. After absorbing heat, the refrigerant flows into the plate heat exchanger 5 to transfer the heat to the refrigerant of the central air conditioning system. This enables the refrigerant to condense in the condenser and release heat to heat the building, thereby improving the heat exchange efficiency and energy storage capacity of the system. It can also make full use of the low-temperature thermal energy underground to achieve the purpose of energy saving and emission reduction.

[0042] To prevent groundwater from seeping into the system and affecting its operation, the inert gas in the high-pressure inert gas tank 6 can be transported to the injection port 602 through the vent pipe 601 and injected into the well. The gas flow rate can be adjusted according to the well pressure information monitored by the pressure sensor 604 through the gas flow regulating valve 603 and the pressure sensor 604. This can maintain the well pressure within a certain range. When the pressure is lower than the set value, the gas flow regulating valve 603 opens to inject gas and increase the pressure. When the pressure is higher than the set value, the regulating valve closes to reduce the amount of gas injected, thus preventing groundwater from seeping into the heat exchange tube.

[0043] The multi-layer composite filtration device at the bottom of the well 3 can block impurities from entering the refrigerant circulation system through the inner and outer filter screens, thus preventing impurities from entering the refrigerant circulation system and affecting the system stability. The sealing ring 8 at the bottom of the well cover 4 is tightly fitted to the inner wall of the well wall 2, thus preventing external impurities and moisture from entering and gas leakage from the well, thus ensuring the sealing and stability of the system.

Claims

1. A heat exchange device for a central air conditioning system with energy storage for a single well, characterized in that, Single well mechanism, including wellhead (1), the bottom of wellhead (1) is provided with well wall (2), the bottom of well wall (2) is provided with well bottom (3), the top of wellhead (1) is provided with cover sealing mechanism; The inner wall of the well wall (2) is fixedly installed with a fixed plate (201), the fixed plate (201) is provided with a heat exchange mechanism, and the top of the wellhead (1) is provided with a cold carrier circulating mechanism and a gas sealing mechanism.

2. The air-tight single-well energy storage central air conditioning heat exchange device according to claim 1, characterized in that: The cover sealing mechanism includes a well cover (4) and a sealing ring (8), the well cover (4) is arranged on the wellhead (1), the sealing ring (8) is arranged at the bottom of the well cover (4), and the sealing ring (8) is matched with the inner wall of the well wall (2).

3. The air-tight single-well energy storage central air conditioning heat exchange device according to claim 1, characterized in that: The heat exchange mechanism includes a plate heat exchanger (5) and a U-shaped heat exchange pipe (203), the left side of the wellhead (1) is provided with a plate heat exchanger (5), the fixed plate (201) is pierced with a U-shaped heat exchange pipe (203), and the port of the U-shaped heat exchange pipe (203) penetrates the well cover (4).

4. The air-tight single-well energy storage central air conditioning heat exchange device according to claim 3, characterized in that: The cold carrier circulating mechanism includes a cold carrier pump (202) and a cold carrier storage tank (204), the top of the well cover (4) is provided with a cold carrier storage tank (204) and a cold carrier pump (202), the cold carrier storage tank (204) is located on the right side of the cold carrier pump (202), the cold carrier storage tank (204) is matched with the cold carrier pump (202), the two ends of the U-shaped heat exchange pipe (203) are respectively connected with the inlet and outlet pipelines of the cold carrier pump (202), and the plate heat exchanger (5) is connected with the inlet and outlet pipelines of the cold carrier pump (202).

5. The air-tight single-well energy storage central air conditioning heat exchange device according to claim 1, characterized in that: The gas sealing mechanism includes a high-pressure inert gas tank (6), an air pipe (601) and a gas injection hole (602), the right side of the wellhead (1) is provided with a high-pressure inert gas tank (6), the left side of the high-pressure inert gas tank (6) is provided with an air pipe (601), the bottom end of the air pipe (601) extends to the lower side of the corresponding fixed plate (201), and the left side of the air pipe (601) is provided with a gas injection hole (602).

6. The air-tight single-well energy storage central air conditioning heat exchange device according to claim 5, characterized in that: The air pipe (601) is provided with a gas flow regulating valve (603) and a pressure sensor (604), the gas flow regulating valve (603) and the pressure sensor (604) are located outside the wellhead (1), and the gas flow regulating valve (603) is located on the right side of the pressure sensor (604).

7. The air-tight single-well energy storage central air conditioning heat exchange device according to claim 3, characterized in that: The U-shaped heat exchange pipe (203) is provided with a temperature sensor (7), and the temperature sensor (7) is located between the well cover (4) and the corresponding fixed plate (201).

8. The air-tight single-well energy storage central air conditioning heat exchange device according to claim 1, characterized in that: The well bottom (3) is provided with a multilayer composite filter device, the multilayer composite filter device includes an inner filter screen and an outer filter screen, and the inner filter screen and the outer filter screen are made of stainless steel.

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