CO2 transcritical cold and heat coupling combined supply device

Abstract

The utility model discloses a CO2 transcritical cold and heat coupling combined supply device, and relates to the technical field of energy supply, the CO2 transcritical cold and heat coupling combined supply device comprises a base, a compressor chamber is installed on the base, a compressor is installed in the compressor chamber, an inlet of the compressor is fixedly connected with a gas-liquid separator through a pipeline, and an outlet of the gas-liquid separator is fixedly connected with a gas-liquid separator through a pipeline. An outlet of the compressor is connected with an oil separator through a pipeline, and an oil outlet of the oil separator is connected with the compressor through a pipeline; an evaporator fixedly connected with the base is installed on the side face of the compressor chamber, and the other side of the base is fixedly connected with a gas cooler corresponding to the evaporator. According to the utility model, the gas tank is matched with the gas inlet pipe and the gas outlet pipe, so that the pressure of the high-pressure side in the system is balanced, the phenomena of pipeline damage or leakage and the like caused by the fact that the pressure exceeds a set value in the use process along with the aging of a sealing ring at a pipeline joint are prevented, and the safety effect during use is improved.

Description

Technical Field

[0001] The utility model specifically relates to the technical field of energy supply, in particular to a CO2 transcritical cold and heat coupling device. Background Art

[0002] The CO2 transcritical cooling and heating coupling device is a new type of energy utilization system. The device uses CO2 as the working medium. Its cycle process is different from the traditional steam compression refrigeration cycle. CO2 is compressed to a supercritical state by the compressor. At this time, its temperature and pressure exceed the critical value. The supercritical CO2 fluid releases heat to the outside world in the gas cooler, and then reduces the pressure and temperature through the throttle valve, enters the evaporator to evaporate and absorb heat to achieve a cooling effect, completing a cycle, cooling and heating coupling: in this process, the heat released by CO2 in the gas cooler is cleverly utilized and used for heating or supplying hot water, thereby realizing the coupling of cooling and heating and improving the comprehensive utilization efficiency of energy.

[0003] However, in practice, people have noticed that due to the high pressure of compressed air in the pipeline, the pipeline needs to be affected by high pressure for a long time, and there are sealing rings at the joints. Long-term high-pressure environment will cause the sealing rings to age rapidly and lose their elasticity. When the pressure inside the pipeline fluctuates greatly, the sealing position will be damaged, resulting in leakage at the joints. In severe cases, the joints will be damaged, causing safety accidents. Utility Model Content

[0004] The purpose of this utility model is to provide a CO2 transcritical cooling and heating coupled cogeneration device. This device utilizes a pressure-stabilizing buffer tank with a spring and piston structure, combined with a one-way valve, to automatically regulate the pressure in the pipeline, preventing excessive pressure fluctuations in the pipeline and ensuring the stability of the device during use. This device aims to address the technical problems raised in the aforementioned background technology. To achieve this objective, the present utility model provides the following technical solutions:

[0005] A CO2 transcritical cooling and heating coupled cogeneration device comprises a base, a compressor chamber is mounted on the base, a compressor is mounted in the compressor chamber, a gas-liquid separator is fixedly connected to the inlet of the compressor via a pipeline, an oil separator is connected to the outlet of the compressor via a pipeline, and an oil outlet of the oil separator is connected to the compressor via a pipeline;

[0006] An evaporator fixedly connected to the base is installed on the side of the compressor chamber, and a gas cooler corresponding to the evaporator is fixedly connected to the other side of the base. A pressure stabilizing buffer tank and a heat exchanger are also fixedly connected to the end of the base away from the compressor chamber.

[0007] As a further technical solution of the present invention, the pressure-stabilizing buffer tank has a gas tank for storing compressed air, and the top of the gas tank is fixedly connected to a buffer tank, wherein a buffer piston is slidably connected in the buffer tank, and a disc spring is fixedly connected to the buffer piston in an annular array.

[0008] As a further technical solution of the present invention, the inner side of the buffer shell is also movably connected to an adjustment pressure plate located above the disc spring, the top of the buffer shell is threadedly connected to a threaded adjustment rod, and the threaded adjustment rod passes through the buffer shell and is movably connected to the top of the adjustment pressure plate.

[0009] As a further technical solution of the present invention, two inlet and outlet pipes for compressed air are alternately arranged on the gas tank, and the ends of the inlet and outlet pipes are connected to the inner side of the compressor chamber through pipelines.

[0010] As a further technical solution of the present invention, a three-way valve is fixedly connected to the outlet of the oil separator, and the other outlets of the three-way valve are connected to the gas cooler and the evaporator through pipelines, wherein two three-way valves are further provided on the pipeline connecting the three-way valve and the evaporator;

[0011] One of the three-way valves is communicated with the heat exchanger through a pipeline, and the other three-way valve is communicated with the inlet of the gas-liquid separator through a pipeline.

[0012] As a further technical solution of the present invention, the other end of the gas cooler is fixedly connected to a three-way valve, and one end of the two outlets of the three-way valve is fixedly connected to a drying filter, and the other end of the drying filter is fixedly connected to a throttle valve;

[0013] The end of the throttle valve away from the drying filter is also fixedly connected to a three-way valve, and the three-way valve is respectively connected to the evaporator and the heat exchanger through pipelines.

[0014] As a further technical solution of the present invention, the other side of the three-way valve at the end of the gas cooler is connected to the heat exchanger through a pipeline and the three-way valve, wherein the end of the three-way valve connected to the heat exchanger and the three-way valve connected to the throttle valve are connected through a pipeline.

[0015] As a further technical solution of the present invention, any one end of the inlet and outlet pipes is connected to the outlet end of the oil separator through a pipe, and the other end of the inlet and outlet pipes is connected to the end of the drying filter away from the throttle valve through a pipe. The ends of the two inlet and outlet pipes are also fixedly connected to one-way valves, and the two one-way valves are installed in opposite directions.

[0016] Compared with the prior art, the beneficial effects of the present invention are:

[0017] 1. The utility model balances the pressure on the high-pressure side of the system through the cooperation between the gas tank and the inlet and outlet pipes, preventing the sealing ring at the pipe connection from aging, causing the pressure to exceed the set value during use, thereby causing damage to the pipe or leakage, etc., and improving the safety effect during use;

[0018] 2. This utility model opens the one-way valves at the ends of the inlet and outlet pipes when the pressure inside the pipeline is high, unloading the pipeline pressure and keeping the pressure inside the pipeline within a controllable range. When the pressure is low and affects the efficiency, the appropriate pressure gas can be delivered into the pipeline to maintain the pressure balance, prevent the pressure inside the pipeline from fluctuating greatly and causing deformation of the pipeline, thereby extending the service life.

[0019] 3. The utility model ensures that the pressure inside the gas tank is always maintained within the set value through the cooperation of the disc spring and the buffer piston. When the pressure is higher, the buffer piston moves upward to increase the volume of the gas tank, ensuring that the pressure is always maintained in a reasonable range. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a structural schematic diagram of the utility model in use state.

[0021] Figure 2 This utility model Figure 1 Another perspective of the picture.

[0022] Figure 3 This utility model Figure 2 Another perspective of the picture.

[0023] Figure 4 It is a pipeline connection schematic diagram of the present utility model.

[0024] Figure 5 It is a schematic diagram of the three-dimensional structure of the pressure-stabilizing buffer tank in the utility model.

[0025] Figure 6 It is a schematic diagram of the internal structure of the buffer shell in the utility model.

[0026] Figure 7 This utility model Figure 6 Schematic diagram of the bottom structure.

[0027] In the picture:

[0028] Base-1, evaporator-2, compressor chamber-3, compressor-31, gas-liquid separator-32, oil separator-33, pressure stabilizing buffer tank-4, gas tank-41, inlet and outlet pipes-42, buffer shell-43, threaded adjustment rod-44, adjustment pressure plate-45, disc spring-46, buffer piston-47, heat exchanger-5, gas cooler-6, drying filter-7, throttle valve-8, three-way valve-9. DETAILED DESCRIPTION

[0029] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0030] See also Figure 1-7 The present invention provides a CO2 transcritical cold and heat coupled cogeneration device, comprising a base 1, a compressor chamber 3 mounted on the base 1, a compressor 31 mounted in the compressor chamber 3, an inlet of the compressor 31 being fixedly connected to a gas-liquid separator 32 via a pipeline, and an outlet of the compressor 31 being connected to an oil separator 33 via a pipeline, and an oil outlet of the oil separator 33 being connected to the compressor 31 via a pipeline;

[0031] An evaporator 2 fixedly connected to the base 1 is installed on the side of the compressor chamber 3, and a gas cooler 6 corresponding to the evaporator 2 is fixedly connected to the other side of the base 1. The end of the base 1 away from the compressor chamber 3 is also fixedly connected to a pressure stabilizing buffer tank 4 and a heat exchanger 5.

[0032] The pressure stabilizing buffer tank 4 has an air tank 41 for storing compressed air, and the top of the air tank 41 is fixedly connected to the buffer tank 4, wherein a buffer piston 47 is slidably connected in the buffer tank 4, and a disc spring 46 is fixedly connected to the buffer piston 47 in an annular array.

[0033] The inner side of the buffer shell 43 is also movably connected to an adjustment pressure plate 45 located above the disc spring 46. The top of the buffer shell 43 is threadedly connected to a threaded adjustment rod 44, and the threaded adjustment rod 44 passes through the buffer shell 43 and is movably connected to the top of the adjustment pressure plate 45.

[0034] The gas tank 41 is staggeredly provided with two inlet and outlet pipes 4 for the compressed air, and the ends of the inlet and outlet pipes 4 are connected to the inner side of the compressor chamber 3 through a pipeline.

[0035] The outlet of the oil separator 33 is fixedly connected to a three-way valve 9, and the other outlets of the three-way valve 9 are connected to the gas cooler 6 and the evaporator 2 through pipelines, wherein two three-way valves 9 are further provided on the pipeline connecting the three-way valve 9 and the evaporator 2;

[0036] One of the three-way valves 9 is communicated with the heat exchanger 5 through a pipeline, and the other three-way valve 9 is communicated with the inlet of the gas-liquid separator 32 through a pipeline.

[0037] The other end of the gas cooler 6 is fixedly connected to a three-way valve 9, and one end of the two outlets of the three-way valve 9 is fixedly connected to a drying filter 7, and the other end of the drying filter 7 is fixedly connected to a throttle valve 8;

[0038] The end of the throttle valve 8 away from the drying filter 7 is also fixedly connected to a three-way valve 9, and the three-way valve 9 is respectively connected to the evaporator 2 and the heat exchanger 5 through pipelines.

[0039] The other side of the three-way valve 9 at the end of the gas cooler 6 is connected to the heat exchanger 5 through a pipeline and the three-way valve 9, wherein the end of the three-way valve 9 connected to the heat exchanger 5 and the three-way valve 9 connected to the throttle valve 8 are connected through a pipeline.

[0040] Any one end of the inlet and outlet pipes 42 is connected to the outlet end of the oil separator 33 through a pipeline, and the other end of the inlet and outlet pipes 42 is connected to the end of the drying filter 7 away from the throttle valve 8 through a pipeline. The ends of the two inlet and outlet pipes 42 are also fixedly connected to one-way valves, and the two one-way valves are installed in opposite directions.

[0041] By adopting the above technical solution, when the pressure in the system is lower than the set value, the one-way valve on either side of the gas tank 41 is opened, and the compressed gas stored in the gas tank 41 is sent into the pipeline through the inlet and outlet pipes 42, thereby reducing the pressure fluctuation during use and preventing large pressure fluctuations from causing deformation or damage to the pipeline. When the pressure in the system is higher than the set value, the one-way valve on the other side is opened, and the excess compressed air in the pipeline is introduced into the gas tank 41 through the inlet and outlet pipes 42 for storage, ensuring that the pressure inside the pipeline is always maintained within a safe range, preventing the aging sealing components at the connection from cracking and damage due to excessive pressure, and improving safety during use.

[0042] The two water inlets of the evaporator 2 and the gas cooler 6 are connected to corresponding water tanks (not shown) on the outside through pipes.

[0043] The working principle of the present invention is: through the mutual cooperation of multiple three-way valves 9, the pipeline can be connected to different devices, the evaporator 2 and the gas cooler 6 can be connected to form a cold and hot coupled supply mode, and the evaporator 2 or the gas cooler 6 can also form a separate heating or cooling circuit with the compressor chamber 3. When in use, the pressure stabilizing buffer tank 4 can automatically adjust the pressure in the pipeline. When the pressure in the system is lower than the set value, the one-way valve on either side of the gas tank 41 is opened, and the compressed gas stored in the gas tank 41 is sent into the pipeline through the inlet and outlet pipes 42, reducing the pressure fluctuation during use and preventing large pressure fluctuations from causing deformation or damage to the pipeline. When the pressure in the system is greater than the set value, the one-way valve on the other side is opened, and the excess compressed air in the pipeline is introduced into the gas tank 41 through the inlet and outlet pipes 42 for storage, ensuring that the pressure inside the pipeline is always maintained within a safe range.

[0044] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the present invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the present invention. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the present invention is defined by the appended claims, not the foregoing description, and all variations within the meaning and range of equivalents of the claims are intended to be encompassed within the present invention. Any reference sign in a claim should not be construed as limiting the claim to which it relates.

[0045] In addition, it should be understood that although this specification is described in terms of implementation methods, not every implementation method contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

Claims

1. A CO2 transcritical cooling and heating coupled device, characterized by: The invention comprises a base (1), a compressor chamber (3) is installed on the base (1), a compressor (31) is installed in the compressor chamber (3), an inlet of the compressor (31) is fixedly connected to a gas-liquid separator (32) via a pipeline, and an outlet of the compressor (31) is connected to an oil separator (33) via a pipeline, and an oil outlet of the oil separator (33) is connected to the compressor (31) via a pipeline; An evaporator (2) fixedly connected to the base (1) is installed on the side of the compressor chamber (3), and a gas cooler (6) corresponding to the evaporator (2) is fixedly connected to the other side of the base (1). The end of the base (1) away from the compressor chamber (3) is also fixedly connected to a pressure stabilizing buffer tank (4) and a heat exchanger (5).

2. The CO2 transcritical cooling and heating coupled device according to claim 1, characterized in that: The pressure stabilizing buffer tank (4) has a gas tank (41) for storing compressed air, and a buffer shell (43) is fixedly connected to the top of the gas tank (41), wherein a buffer piston (47) is slidably connected in the buffer shell (43), and a disc spring (46) is fixedly connected to the buffer piston (47) in an annular array.

3. The CO2 transcritical cooling and heating coupled device according to claim 2, characterized in that: The inner side of the buffer shell (43) is also movably connected to an adjustment pressure plate (45) located above the disc spring (46), and the top of the buffer shell (43) is threadedly connected to a threaded adjustment rod (44), and the threaded adjustment rod (44) passes through the buffer shell (43) and is movably connected to the top of the adjustment pressure plate (45).

4. The CO2 transcritical cooling and heating coupled device according to claim 3, characterized in that: Two inlet and outlet pipes (42) for compressed air are staggeredly arranged on the gas tank (41), and the ends of the inlet and outlet pipes (42) are connected to the inner side of the compressor chamber (3) through a pipeline.

5. The CO2 transcritical cooling and heating coupled device according to claim 4, characterized in that: The outlet of the oil separator (33) is fixedly connected to a three-way valve (9), and the other outlets of the three-way valve (9) are respectively connected to the gas cooler (6) and the evaporator (2) through pipelines, wherein two three-way valves (9) are further provided on the pipeline connecting the three-way valve (9) and the evaporator (2); One of the three-way valves (9) is connected to the heat exchanger (5) through a pipeline, and the other three-way valve (9) is connected to the inlet of the gas-liquid separator (32) through a pipeline.

6. The CO2 transcritical cooling and heating coupled device according to claim 5, characterized in that: The other end of the gas cooler (6) is fixedly connected to a three-way valve (9), and one end of the two outlets of the three-way valve (9) is fixedly connected to a drying filter (7), and the other end of the drying filter (7) is fixedly connected to a throttle valve (8); The end of the throttle valve (8) away from the drying filter (7) is also fixedly connected to a three-way valve (9), and the three-way valve (9) is connected to the evaporator (2) and the heat exchanger (5) through pipelines.

7. The CO2 transcritical cooling and heating coupled device according to claim 6, characterized in that: The other side of the three-way valve (9) at the end of the gas cooler (6) is connected to the heat exchanger (5) through a pipeline and the three-way valve (9), wherein the end of the three-way valve (9) connected to the heat exchanger (5) and the three-way valve (9) connected to the throttle valve (8) are connected through a pipeline.

8. The CO2 transcritical cooling and heating coupled device according to claim 7, characterized in that: The end of any one of the air inlet and outlet pipes (42) is connected to the outlet end of the oil separator (33) through a pipeline, and the end of the other air inlet and outlet pipe (42) is connected to the end of the drying filter (7) away from the throttle valve (8) through a pipeline. The ends of the two air inlet and outlet pipes (42) are also fixedly connected to one-way valves, and the two one-way valves are installed in opposite directions.

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