Temperature reduction system based on switchable gas mixing supercharging device

Abstract

The invention relates to the technical field of temperature control equipment or systems, in particular to a temperature reduction system based on a switchable gas mixing supercharging device. Comprising a switchable gas mixing supercharging device, a gas-liquid separator, a compressor, a gas cooler, a throttle valve and an evaporator, a high-pressure fluid inlet of the switchable gas mixing supercharging device is connected with an outlet of the gas cooler and is used for receiving high-pressure fluid output by the gas cooler; the low-pressure fluid inlet is connected with an outlet of the evaporator and used for receiving low-pressure fluid output by the evaporator; received high-pressure fluid and low-pressure fluid are pressurized through the main fluid mixing and pressurizing device, the circulation loop and the secondary fluid mixing and pressurizing device and output to the gas-liquid separator through the medium-pressure fluid outlet. The system can adapt to various working conditions and load changes, the working state is adjusted according to the actual requirement of the temperature reduction system, and therefore it is guaranteed that efficient operation can be maintained under various conditions.

Description

Technical Field

[0001] The present invention relates to the technical field of refrigeration equipment or systems, and in particular to a temperature reduction system based on a switchable gas mixing and boosting device. Background Art

[0002] The cooling system has broad application prospects, especially in the fields of automotive air-conditioning, heat pump systems and commercial refrigeration equipment, showing great development potential and market value. The cooling system is based on a transcritical cycle and achieves refrigeration through four stages of compression, cooling, throttling and evaporation. During the compression stage, the low-pressure gas is pressurized and heated by the compressor; during the cooling stage, the high-pressure gas is cooled by heat exchange in the condenser; during the throttling stage, the high-pressure gas is depressurized by the throttle valve and may be converted into a gas-liquid mixed state; during the evaporation stage, the mixture absorbs heat in the evaporator and becomes a low-pressure gas to achieve refrigeration.

[0003] In the cooling system, the compression stage depends on the operation of the compressor, the cooling stage is handled by the gas cooler, the throttling stage is completed by a throttling valve or an expansion valve, and the evaporation stage is achieved by an evaporator. However, traditional throttling valves and expansion valves have the disadvantages of large throttling losses, low refrigeration efficiency and high power consumption. Especially under partial load or variable load operation, the performance of traditional throttling valves and expansion valves is limited, and it is difficult to maximize energy efficiency. In contrast, the advantage of the ejector is that it can recover part of the expansion work, effectively reduce throttling losses, increase cooling capacity, and reduce compression power consumption, thereby improving the overall performance of the system. However, the performance of the ejector is sensitive to changes in operating conditions, especially in carbon dioxide refrigeration systems with higher pressure and temperature on the high-pressure side. Changes in ambient temperature and load will significantly affect its efficiency, resulting in limited energy efficiency improvement under certain conditions, especially under low load or partial load operation, which may even be lower than the performance of traditional expansion valves. Summary of the invention

[0004] In order to solve the problems existing in the prior art, the present invention provides a cooling system based on a switchable gas mixing and boosting device, the system comprising: a switchable gas mixing and boosting device, a gas-liquid separator, a compressor, a gas cooler, a throttle valve and an evaporator; the high-pressure fluid inlet of the switchable gas mixing and boosting device is connected to the outlet of the gas cooler, for receiving the high-pressure fluid output by the gas cooler; the low-pressure fluid inlet of the switchable gas mixing and boosting device is connected to the outlet of the evaporator, for receiving the low-pressure fluid output by the evaporator; the switchable gas mixing and boosting device pressurizes the received high-pressure fluid and low-pressure fluid through the main fluid mixing and boosting device, the circulation loop and the secondary fluid mixing and boosting device, and outputs them to the gas-liquid separator through the medium-pressure fluid outlet. The system of the present invention can adapt to various working conditions and load changes, adjust the working state according to the actual needs of the cooling system, so as to ensure that efficient operation can be maintained under various conditions.

[0005] The present invention adopts the following technical solution: a temperature reduction system based on a switchable gas mixing and supercharging device, comprising: a switchable gas mixing and supercharging device, a gas-liquid separator, a compressor, a gas cooler, a throttle valve and an evaporator; The switchable gas mixing and boosting device comprises: a high-pressure fluid inlet, a low-pressure fluid inlet, a medium-pressure fluid outlet, a main fluid mixing and boosting device, a circulation loop and a secondary fluid mixing and boosting device; the high-pressure fluid inlet of the switchable gas mixing and boosting device is connected to the outlet of the gas cooler for receiving the high-pressure fluid output by the gas cooler; the low-pressure fluid inlet of the switchable gas mixing and boosting device is connected to the outlet of the evaporator for receiving the low-pressure fluid output by the evaporator; the switchable gas mixing and boosting device boosts the received high-pressure fluid and low-pressure fluid through the main fluid mixing and boosting device, the circulation loop and the secondary fluid mixing and boosting device, and outputs them to the gas-liquid separator through the medium-pressure fluid outlet; Further, the main fluid mixing and pressurizing device includes: a main ejector, a main ejector high-pressure flow pipeline, a main ejector low-pressure flow pipeline, a main ejector medium-pressure flow pipeline, a main ejector medium-pressure fluid outlet ball valve, a high-pressure fluid pressure transmitter, a low-pressure fluid pressure transmitter, and a main medium-pressure fluid pressure transmitter; The main ejector is connected to the high-pressure fluid inlet through the main ejector high-pressure flow pipeline, directly connected to the low-pressure fluid inlet through the main ejector low-pressure flow pipeline, and connected to the medium-pressure fluid outlet through the main ejector medium-pressure flow pipeline and the main ejector medium-pressure fluid outlet ball valve on the pipeline; the main ejector high-pressure flow pipeline, medium-pressure flow pipeline and low-pressure flow pipeline are provided with corresponding high-pressure fluid pressure transmitters, medium-pressure fluid pressure transmitters and low-pressure fluid pressure transmitters; Furthermore, the circulation loop includes a circulation pipeline and a circulation ball valve; the circulation pipeline is provided with a circulation ball valve, and the circulation pipeline is respectively connected to the main injection medium-pressure flow pipeline and the main injection low-pressure flow pipeline.

[0006] Further, the secondary fluid mixing and pressurizing device comprises: an auxiliary ejector, an auxiliary ejection high-pressure flow pipeline, an auxiliary ejection low-pressure flow pipeline, an auxiliary ejection medium-pressure flow pipeline, an auxiliary ejection high-pressure fluid inlet ball valve, an auxiliary ejection low-pressure fluid inlet ball valve, an auxiliary ejection medium-pressure fluid outlet ball valve and a secondary medium-pressure fluid pressure transmitter; The auxiliary ejector is connected to the high-pressure fluid inlet through the auxiliary ejection high-pressure flow pipeline and the auxiliary ejection high-pressure fluid inlet ball valve on the pipeline, is directly connected to the main ejection medium-pressure flow pipeline through the auxiliary ejection low-pressure flow pipeline and the auxiliary ejection low-pressure fluid inlet ball valve on the pipeline, and is connected to the medium-pressure fluid outlet through the auxiliary ejection medium-pressure flow pipeline and the auxiliary ejection medium-pressure fluid outlet ball valve on the pipeline; a secondary medium-pressure fluid pressure transmitter is provided on the auxiliary ejection medium-pressure flow pipeline.

[0007] Furthermore, the main ejector high-pressure flow pipeline, medium-pressure flow pipeline and low-pressure flow pipeline are provided with corresponding high-pressure fluid pressure transmitters, medium-pressure fluid pressure transmitters and low-pressure fluid pressure transmitters, specifically: The high-pressure fluid pressure transmitter is used to monitor the pressure of the main ejection high-pressure flow pipeline and adjust the mode switching between the main fluid mixing and boosting device and the secondary fluid mixing and boosting device according to the feedback signal; The medium-pressure fluid pressure transmitter is used to monitor the pressure of the main injection medium-pressure fluid pipeline and adjust the opening of the main injection medium-pressure fluid outlet ball valve according to the feedback signal; The low-pressure fluid pressure transmitter is used to monitor the pressure of the main injection low-pressure flow pipeline and adjust the opening of the circulation ball valve according to the feedback signal.

[0008] Furthermore, the secondary medium-pressure fluid pressure transmitter is used to monitor the pressure of the auxiliary injection medium-pressure fluid pipeline and adjust the opening of the auxiliary injection medium-pressure fluid outlet ball valve according to the feedback signal.

[0009] The beneficial effects of the present invention are as follows: the switchable gas mixing and boosting device proposed in the present invention can flexibly adapt to various working conditions and load changes. When used in a cooling system, it can automatically adjust its working state according to the actual needs of the cooling system to ensure that efficient operation can be maintained under various conditions; the boosting device significantly improves the gas compression effect on the low-pressure side by more effectively utilizing the energy on the high-pressure side, reduces energy loss, and thereby improves the energy efficiency of the entire cooling system. At the same time, it effectively balances the pressure between the high-pressure side and the low-pressure side, prevents pressure fluctuations or instability in the cooling system, and thus enhances the stability of the cooling system; the switchable gas mixing and boosting device proposed in the present invention is not only suitable for cooling systems, but can also replace traditional expansion valves and conventional ejectors, and has broad application potential, which can be expanded to other fields and corresponding systems such as gas recovery and boosting, high-pressure fluid transmission, etc. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0011] Figure 1 This is a schematic diagram of the structure of a temperature reduction system based on a switchable gas mixing and boosting device according to an embodiment of the present invention; Figure 2 This is a schematic structural diagram of a switchable gas mixing and boosting device according to an embodiment of the present invention; 1. Switchable gas mixing and boosting device; 2. Gas-liquid separator; 3. Compressor; 4. Gas cooler; 5. Throttle valve; 6. Evaporator; 101. High-pressure fluid inlet; 102. Low-pressure fluid inlet; 103. Medium-pressure fluid outlet; 104. Main ejector; 105. Auxiliary ejector; 106. Main ejector high-pressure flow pipeline; 107. Main ejector low-pressure flow pipeline; 108. Main ejector medium-pressure flow pipeline; 109. Circulation pipeline; 110. Auxiliary ejector high-pressure flow pipeline; 111. Auxiliary injection low-pressure flow pipeline; 112. Auxiliary injection medium-pressure flow pipeline; 113. Main injection medium-pressure fluid outlet ball valve; 114. Circulation ball valve; 115. Auxiliary injection high-pressure fluid inlet ball valve; 116. Auxiliary injection low-pressure fluid inlet ball valve; 117. Auxiliary injection medium-pressure fluid outlet ball valve; 118. High-pressure fluid pressure transmitter; 119. Low-pressure fluid pressure transmitter; 120. Main medium-pressure fluid pressure transmitter; 121. Secondary medium-pressure fluid pressure transmitter. DETAILED DESCRIPTION

[0012] 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 described embodiments 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 creative work are within the scope of protection of the present invention.

[0013] A schematic diagram of a temperature reduction system based on a switchable gas mixing and boosting device according to an embodiment of the present invention is shown in FIG. Figure 1 As shown, it includes a switchable gas mixing and boosting device 1, a gas-liquid separator 2, a compressor 3, a gas cooler 4, a throttle valve 5, and an evaporator 6; wherein, the high-pressure fluid inlet 101 of the switchable gas mixing and boosting device 1 is connected to the outlet of the gas cooler 4, for receiving the high-pressure fluid output by the gas cooler 4; the low-pressure fluid inlet 102 of the switchable gas mixing and boosting device 1 is connected to the outlet of the evaporator 6, for receiving the low-pressure fluid output by the evaporator 6; the switchable gas mixing and boosting device 1 boosts the received high-pressure fluid and low-pressure fluid through the main fluid mixing and boosting device, the circulation loop and the secondary fluid mixing and boosting device, and outputs them to the gas-liquid separator 2 through the medium-pressure fluid outlet 103.

[0014] In a specific embodiment of the present invention: like Figure 2 FIG. 1 is a schematic diagram of the structure of a switchable gas mixing and boosting device 1 according to an embodiment of the present invention. The device comprises a main fluid mixing and boosting device, a circulation loop and a secondary fluid mixing and boosting device, wherein: The main fluid mixing and pressurizing device includes: a main ejector 104, a main ejector high-pressure flow pipeline 106, a main ejector low-pressure flow pipeline 107, a main ejector medium-pressure flow pipeline 108, a main ejector medium-pressure fluid outlet ball valve 113, a high-pressure fluid pressure transmitter 118, a low-pressure fluid pressure transmitter 119 and a main medium-pressure fluid pressure transmitter 120; correspondingly, the main ejector 104 is connected to the high-pressure fluid inlet 101 through the main ejector high-pressure flow pipeline 106; the main ejector 104 is connected to the high-pressure fluid inlet 101 through the main ejector low-pressure flow pipeline 107 and The low-pressure fluid inlet 102 is connected; a main injection medium-pressure fluid outlet ball valve 113 is provided on the main injection medium-pressure flow pipeline 108, and the main injector 104 is connected to the medium-pressure fluid outlet 103 through the main injection medium-pressure flow pipeline 108; a high-pressure fluid pressure transmitter 118 is arranged on the corresponding main injection high-pressure flow pipeline 106; a low-pressure fluid pressure transmitter 119 is arranged on the corresponding main injection low-pressure flow pipeline 107; and a main medium-pressure fluid pressure transmitter 120 is arranged on the corresponding main injection medium-pressure flow pipeline 108.

[0015] The circulation loop includes: a circulation pipeline 109 and a circulation ball valve 114; the circulation ball valve 114 is arranged on the circulation pipeline 109, so as to connect the main ejection medium pressure flow pipeline 108 and the main ejection low pressure flow pipeline 107 through the circulation pipeline 109; The secondary fluid mixing and pressurizing device comprises: an auxiliary ejector 105, an auxiliary ejection high-pressure flow pipeline 110, an auxiliary ejection low-pressure flow pipeline 111, an auxiliary ejection medium-pressure flow pipeline 112, an auxiliary ejection high-pressure fluid inlet ball valve 115, an auxiliary ejection low-pressure fluid inlet ball valve 116, an auxiliary ejection medium-pressure fluid outlet ball valve 117 and a secondary medium-pressure fluid pressure transmitter 121; the auxiliary ejector 105 is the same as the main fluid mixing and pressurizing device, and the auxiliary ejector 105 is connected to the auxiliary ejection high-pressure flow pipeline 110 and the auxiliary ejector on the pipeline. The high-pressure fluid inlet ball valve 115 is directly connected to the high-pressure fluid inlet 101; the auxiliary ejector 105 is connected to the main ejection medium-pressure flow pipeline 108 through the auxiliary ejection low-pressure flow pipeline 111 and the auxiliary ejection low-pressure fluid inlet ball valve 116 on its pipeline; the auxiliary ejector 105 is connected to the medium-pressure fluid outlet 103 through the auxiliary ejection medium-pressure flow pipeline 112 and the auxiliary ejection medium-pressure fluid outlet ball valve 117 on its pipeline; a secondary medium-pressure fluid pressure transmitter 121 is provided on the auxiliary ejection medium-pressure flow pipeline 112.

[0016] The switchable gas mixing and boosting device in this embodiment has a switching control logic that monitors the pressure of the main ejection high-pressure flow pipeline 106, that is, the pressure of the high-pressure fluid inlet 101, according to the high-pressure fluid pressure transmitter 118; when the pressure change is relatively high, the pressure of the medium-pressure fluid outlet 103 can reach the target pressure only by using the main ejector 104 through the main mixing and boosting fluid system. At this time, the auxiliary ejection high-pressure fluid inlet ball valve 115, the auxiliary ejection low-pressure fluid inlet ball valve 116 and the auxiliary ejection medium-pressure fluid outlet ball valve 117 need to be closed, and the high-pressure fluid flowing through the main ejection high-pressure flow pipeline 106 enters the main ejector 104 to eject the low-pressure fluid flowing through the main ejection low-pressure flow pipeline 107 to become the medium-pressure fluid, and finally flows through the main ejection medium-pressure flow pipeline 108 to reach the medium-pressure fluid outlet 103; when the pressure change is relatively low, the main ejector 104 and the auxiliary ejector 105 need to be used at the same time to make the pressure of the medium-pressure fluid outlet 103 reach the target pressure. When the auxiliary ejection high-pressure fluid inlet ball valve 115, the auxiliary ejection low-pressure fluid inlet ball valve 116 and the auxiliary ejection medium-pressure fluid outlet ball valve 117 are opened, and the main ejection medium-pressure fluid outlet ball valve 113 is closed. The operation process of the first half of the secondary fluid mixing and pressurizing device is the same as that of the main fluid mixing and pressurizing device. The difference lies in the second half. The medium-pressure fluid flowing out of the main ejector 104 and through the main ejection medium-pressure flow pipeline 108 does not directly reach the medium-pressure fluid outlet 103 due to the pressure not meeting the standard, but flows through the auxiliary ejection low-pressure flow pipeline 111 as the low-pressure fluid of the auxiliary ejector 105 (called the main medium-pressure fluid). The high-pressure fluid flowing through the auxiliary ejection high-pressure flow pipeline 110 is ejected in the auxiliary ejector 105 into a higher medium-pressure fluid that meets the target pressure (called the secondary medium-pressure fluid), and finally flows through the auxiliary ejection medium-pressure flow pipeline 112 to reach the medium-pressure fluid outlet 103. This control logic is used to cope with the pressure and flow variable working conditions of the high-pressure fluid.

[0017] In the embodiment of the present invention, the circulation control logic of the main fluid mixing and pressurizing device is: The main low-pressure fluid pressure transmitter 119 is used to monitor the pressure of the main injection low-pressure flow pipeline 107, that is, the pressure of the low-pressure fluid inlet 102; when the pressure is lower than the operating pressure, that is, the flow rate decreases, the circulating ball valve 114 receives the feedback signal from the low-pressure fluid pressure transmitter 119 to adjust the opening, so that part of the medium-pressure fluid is circulated back from the main injection medium-pressure flow pipeline 108 to the main injection low-pressure flow pipeline 107 according to the opening. This control logic is used to cope with the pressure and flow changes of the low-pressure fluid.

[0018] In the embodiment of this case, the main medium-pressure fluid pressure control logic in the main fluid mixing and boosting device is: The main medium-pressure fluid pressure transmitter 120 is used to monitor the pressure of the main injection medium-pressure flow pipeline 108, that is, the pressure of the medium-pressure fluid outlet 103; when the main medium-pressure fluid pressure is lower than the target pressure, the main injection medium-pressure fluid outlet ball valve 113 receives the feedback signal from the main medium-pressure fluid pressure transmitter 120 to adjust the opening, so that the main medium-pressure fluid pressure in the main injection medium-pressure flow pipeline 108 rises, and the pressure of the medium-pressure fluid outlet 103 also reaches the target pressure. This control logic is used to achieve the target pressure in the main fluid mixing and boosting device.

[0019] In the embodiment of the present invention, the secondary medium-pressure fluid pressure control logic in the secondary fluid mixing and boosting device is: The pressure of the auxiliary injection medium-pressure flow pipeline 112, that is, the pressure of the medium-pressure fluid outlet 103, is monitored according to the secondary medium-pressure fluid pressure transmitter 121; when the secondary medium-pressure fluid pressure is lower than the target pressure, the auxiliary injection medium-pressure fluid outlet ball valve 117 receives the feedback signal from the secondary medium-pressure fluid pressure transmitter 121 to adjust the opening, so that the secondary medium-pressure fluid pressure in the auxiliary injection medium-pressure flow pipeline 112 rises, and the pressure of the medium-pressure fluid outlet 103 also reaches the target pressure. This control logic is used to achieve the target pressure in the secondary fluid mixing and boosting device.

[0020] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A temperature reduction system based on a switchable gas mixing and boosting device, characterized in that: include: Switchable gas mixing and boosting device, gas-liquid separator, compressor, gas cooler, throttle valve and evaporator; The switchable gas mixing and pressurizing device comprises: a high-pressure fluid inlet, a low-pressure fluid inlet, a medium-pressure fluid outlet, a primary fluid mixing and pressurizing device, a circulation loop and a secondary fluid mixing and pressurizing device; The high-pressure fluid inlet of the switchable gas mixing and boosting device is connected to the outlet of the gas cooler, and is used to receive the high-pressure fluid output by the gas cooler; the low-pressure fluid inlet of the switchable gas mixing and boosting device is connected to the outlet of the evaporator, and is used to receive the low-pressure fluid output by the evaporator; the switchable gas mixing and boosting device boosts the received high-pressure fluid and low-pressure fluid through the main fluid mixing and boosting device, the circulation loop and the secondary fluid mixing and boosting device, and outputs them to the gas-liquid separator through the medium-pressure fluid outlet.

2. A temperature reduction system based on a switchable gas mixing and boosting device according to claim 1, characterized in that: The main fluid mixing and pressurizing device comprises: a main ejector, a main ejector high-pressure flow pipeline, a main ejector low-pressure flow pipeline, a main ejector medium-pressure flow pipeline, a main ejector medium-pressure fluid outlet ball valve, a high-pressure fluid pressure transmitter, a low-pressure fluid pressure transmitter, and a main medium-pressure fluid pressure transmitter; The main ejector is connected to the high-pressure fluid inlet through the main ejector high-pressure flow pipeline, is directly connected to the low-pressure fluid inlet through the main ejector low-pressure flow pipeline, and is connected to the medium-pressure fluid outlet through the main ejector medium-pressure flow pipeline and the main ejector medium-pressure fluid outlet ball valve on the pipeline; the main ejector high-pressure flow pipeline, medium-pressure flow pipeline and low-pressure flow pipeline are provided with corresponding high-pressure fluid pressure transmitters, medium-pressure fluid pressure transmitters and low-pressure fluid pressure transmitters.

3. A temperature reduction system based on a switchable gas mixing and boosting device according to claim 1, characterized in that: The circulation loop comprises a circulation pipeline and a circulation ball valve; the circulation pipeline is provided with a circulation ball valve, and the circulation pipeline is respectively connected to the main ejection medium-pressure flow pipeline and the main ejection low-pressure flow pipeline.

4. A temperature reduction system based on a switchable gas mixing and boosting device according to claim 1, characterized in that: The secondary fluid mixing and pressurizing device comprises: an auxiliary ejector, an auxiliary ejection high-pressure flow pipeline, an auxiliary ejection low-pressure flow pipeline, an auxiliary ejection medium-pressure flow pipeline, an auxiliary ejection high-pressure fluid inlet ball valve, an auxiliary ejection low-pressure fluid inlet ball valve, an auxiliary ejection medium-pressure fluid outlet ball valve and a secondary medium-pressure fluid pressure transmitter; The auxiliary ejector is connected to the high-pressure fluid inlet through the auxiliary ejection high-pressure flow pipeline and the auxiliary ejection high-pressure fluid inlet ball valve on the pipeline, is directly connected to the main ejection medium-pressure flow pipeline through the auxiliary ejection low-pressure flow pipeline and the auxiliary ejection low-pressure fluid inlet ball valve on the pipeline, and is connected to the medium-pressure fluid outlet through the auxiliary ejection medium-pressure flow pipeline and the auxiliary ejection medium-pressure fluid outlet ball valve on the pipeline; a secondary medium-pressure fluid pressure transmitter is provided on the auxiliary ejection medium-pressure flow pipeline.

5. A temperature reduction system based on a switchable gas mixing and boosting device according to claim 2, characterized in that: The main ejection high-pressure flow pipeline, medium-pressure flow pipeline and low-pressure flow pipeline are provided with corresponding high-pressure fluid pressure transmitters, medium-pressure fluid pressure transmitters and low-pressure fluid pressure transmitters, specifically: The high-pressure fluid pressure transmitter is used to monitor the pressure of the main ejection high-pressure flow pipeline and adjust the mode switching between the main fluid mixing and boosting device and the secondary fluid mixing and boosting device according to the feedback signal; The medium-pressure fluid pressure transmitter is used to monitor the pressure of the main injection medium-pressure fluid pipeline and adjust the opening of the main injection medium-pressure fluid outlet ball valve according to the feedback signal; The low-pressure fluid pressure transmitter is used to monitor the pressure of the main injection low-pressure flow pipeline and adjust the opening of the circulation ball valve according to the feedback signal.

6. A temperature reduction system based on a switchable gas mixing and boosting device according to claim 4, characterized in that: The secondary medium-pressure fluid pressure transmitter is used to monitor the pressure of the auxiliary injection medium-pressure fluid pipeline and adjust the opening of the auxiliary injection medium-pressure fluid outlet ball valve according to the feedback signal.

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