A remote cryogenic gas cooling system

Abstract

The utility model discloses a remote low temperature gas cooling system, including heat exchange pipe group, heat exchange pipe group includes the reciprocating coil of multiple rows and overlapping distribution, along the length direction of every reciprocating coil is sheathed with a plurality of cooling jacket, and every cooling jacket is sealed fixed connection with corresponding reciprocating coil, including the air inlet pipe group and exhaust pipe group at heat exchange pipe group both ends, the air inlet pipe group includes with every reciprocating coil one -to -one corresponding branch air inlet pipe, and the one end of all cooling jacket of every reciprocating coil is communicated with corresponding branch air inlet pipe. The utility model discloses as a kind of temporary cooling method, only when condenser reaches thermal protection temperature, remote start cooling source cooling, especially applicable to high temperature weather, poor ventilation environment of outdoor unit.

Description

Technical Field

[0001] This utility model relates to the field of heat dissipation technology, specifically to a remote cryogenic gas cooling system. Background Technology

[0002] The refrigeration cycle of an air conditioning system mainly relies on the coordinated operation of four core components: the compressor, the condenser, the expansion valve, and the evaporator. These components are connected by copper pipes to form a closed-loop system. The high-temperature, high-pressure gaseous refrigerant discharged from the compressor enters the condenser of the outdoor unit (usually a heat exchanger composed of overlapping reciprocating coils and aluminum fins). The axial fan of the outdoor unit draws in outdoor air, which flows over the surface of the condenser, carrying away the latent heat of condensation released by the refrigerant. As heat is dissipated, the high-temperature, high-pressure gaseous refrigerant gradually liquefies into a room-temperature, high-pressure liquid refrigerant.

[0003] In theory, in cooling mode, the condenser heat dissipation (Q_reject) = evaporator heat absorption (Q_absorb) + compressor work (W_compressor) is sufficient to maintain the normal and continuous operation of the air conditioning system. However, in practice, air conditioning systems often experience overheating and shutdown protection issues. The reasons for this problem are as follows: 1. In hot weather, especially during the hottest time of day in summer: from 2 pm to 3 pm, although the outdoor unit fan reaches its maximum power, the ambient temperature is too high, causing the heat dissipation power to be lower than the theoretical heat dissipation power, resulting in overheating of the outdoor unit.

[0004] 2. Poor ventilation in the installation space: Due to the limitations of building design requirements, most existing air conditioning outdoor unit locations are embedded in the building structure. Both air intake and exhaust are concentrated in front of the air conditioning unit location. Moreover, the limited space of the air conditioning outdoor unit location results in poor natural air circulation. When the air conditioning system continues to cool at full power, the probability of thermal protection is relatively high.

[0005] To address the aforementioned issues, existing solutions include modifying the structure of the outdoor air conditioning unit to improve ventilation, or using spray reciprocating coils and aluminum fins to reduce the outdoor unit temperature. However, both methods are limited by building structure and cannot be applied to all building structures. Therefore, a cooling system that can effectively solve the aforementioned short-term overheating phenomenon is currently lacking. Utility Model Content

[0006] To address the shortcomings of existing technologies, this utility model provides a remote cryogenic gas cooling system, including a heat exchange tube assembly comprising multiple rows of overlapping reciprocating coils. Multiple cooling sleeves are fitted along the length of each reciprocating coil, and each cooling sleeve is sealed and fixedly connected to its corresponding reciprocating coil. The system includes an inlet pipe assembly and an exhaust pipe assembly located at both ends of the heat exchange tube assembly. The inlet pipe assembly includes branch inlet pipes corresponding to each reciprocating coil, and one end of each cooling sleeve of each reciprocating coil is connected to its corresponding branch inlet pipe. The exhaust pipe assembly includes branch exhaust pipes corresponding to each reciprocating coil, and the other end of each cooling sleeve of each reciprocating coil is connected to its corresponding branch exhaust pipe. The system also includes a cold source and a temperature control pipeline. The cryogenic gas from the cold source is connected to the inlet pipe assembly via the temperature control pipeline, which controls the flow between the cryogenic gas and the inlet pipe assembly.

[0007] The preferred embodiment of the remote cryogenic gas cooling system of this utility model is as follows: Each reciprocating coil includes a curved section and a straight section. Each pair of adjacent reciprocating coils overlaps, ensuring that all straight sections of each pair of adjacent reciprocating coils are aligned. All cooling sleeves of each reciprocating coil are evenly spaced along their corresponding straight sections, with at least three cooling sleeves fitted onto each straight section. Because the cooling sleeves are larger than the reciprocating coils and exhibit some wind resistance, to avoid them affecting the ventilation performance of the condenser, all cooling sleeves at the same location are overlapped along a direction perpendicular to the reciprocating coils, preventing misalignment that would increase the windward area.

[0008] The preferred embodiment of the remote cryogenic gas cooling system of this utility model is as follows: In each straight segment, the adjacent ends of every two adjacent cooling sleeves are connected by an insulation pipe. The two cooling sleeves located at both ends of the straight segment are respectively connected to the corresponding branch inlet pipe and branch exhaust pipe through additional insulation pipes. The insulation pipe adopts a double-layer structure, with a thin copper tube inside and a high-temperature resistant heat-insulating plastic outside, to prevent the cryogenic gas from absorbing excessive heat as it passes through the insulation pipe.

[0009] The preferred embodiment of the remote cryogenic gas cooling system of this utility model is as follows: the temperature control pipeline includes a branch pipeline, a booster pipeline, an overflow pipeline, and a controller; the branch pipeline is connected to all branch inlet pipes one by one, and each branch inlet pipe is equipped with a proportional distribution solenoid valve between the branch pipeline and the branch pipeline; the booster pipeline is connected between the cold source and the branch pipeline, and the booster pipeline is equipped with a booster pump; the output terminal of the controller is electrically connected to the booster pump and all the proportional distribution solenoid valves respectively.

[0010] The beneficial effects of this utility model are as follows: Without altering the building structure, cooling jackets are added to the reciprocating coils of the condenser. When the condenser's real-time temperature exceeds the thermal protection temperature, the cold source releases low-temperature cooling gas through the temperature-controlled piping. This cooling gas rapidly flows through all the cooling jackets, quickly lowering the refrigerant temperature within the reciprocating coils and effectively resolving the outdoor unit overheating issue. When the condenser's real-time temperature falls below the thermal protection temperature, the temperature-controlled piping disconnects. As a temporary cooling method, the cold source is remotely activated only when the condenser reaches the thermal protection temperature. This is particularly suitable for hot weather and poorly ventilated outdoor unit environments. Attached Figure Description

[0011] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, the elements or parts are not necessarily drawn to scale.

[0012] Figure 1 This is a schematic diagram of the remote cryogenic gas cooling system in this embodiment; Figure 2 for Figure 1 A three-dimensional image; Figure 3 This is a schematic diagram of the circuit connection of the remote cryogenic gas cooling system in this embodiment.

[0013] In the attached diagram: 1. Reciprocating coil; 2. Cooling jacket; 3. Bend section; 4. Straight section; 5. Branch intake pipe; 6. Branch exhaust pipe; 7. Insulation pipe; 8. Silencing pipe. Detailed Implementation

[0014] The embodiments of the present invention will now be described in detail with reference to the accompanying drawings. These embodiments are merely illustrative of the present invention and should not be construed as limiting the scope of protection of the present invention.

[0015] It should be noted that, unless otherwise stated, the technical or scientific terms used in this application shall have the ordinary meaning as understood by one of ordinary skill in the art to which this utility model pertains.

[0016] like Figure 1As shown, this embodiment provides a remote cryogenic gas cooling system, including a heat exchange tube assembly. The heat exchange tube assembly includes four rows of overlapping reciprocating coils 1, all of which are connected end-to-end, similar to existing structures. For clarity, the connection between the ends of the reciprocating coils 1 is not shown in the schematic diagram; each reciprocating coil 1 is independent. However, in actual applications, they should be connected end-to-end according to existing structures. The actual number of reciprocating coils 1 in the condenser is selected based on the air conditioning cooling power. This embodiment does not limit the specific number of reciprocating coils 1. The heat exchange tube assembly in this embodiment, as part of the condenser structure, is adapted according to the air conditioning type and is not limited to household air conditioners, industrial air conditioners, etc. Multiple cooling sleeves 2 are fitted along the length of each reciprocating coil 1, and each cooling sleeve 2 is sealed and fixedly connected to the corresponding reciprocating coil 1. Specifically, each reciprocating coil 1 includes a curved section 3 and a straight section 4. Each pair of adjacent reciprocating coils 1 overlaps, ensuring that all straight sections 4 of each pair of adjacent reciprocating coils 1 are aligned. All cooling sleeves 2 of each reciprocating coil 1 are evenly spaced along their corresponding straight sections 4, and each straight section 4 has at least three cooling sleeves 2. This embodiment uses four cooling sleeves 2 as an example. Because the volume of the cooling sleeves 2 is larger than that of the reciprocating coil 1, the cooling sleeves 2 have a certain wind resistance. To avoid the cooling sleeves 2 affecting the ventilation performance of the condenser, all cooling sleeves 2 at the same location are overlapped along a direction perpendicular to the reciprocating coil 1, avoiding misalignment that would increase the windward area.

[0017] like Figure 2 As shown, this embodiment includes an inlet pipe group and an exhaust pipe group located at both ends of the heat exchanger tube group. The inlet pipe group includes a branch inlet pipe 5 corresponding to each reciprocating coil 1, and one end of all cooling sleeves 2 of each reciprocating coil 1 is connected to the corresponding branch inlet pipe 5. The exhaust pipe group includes a branch exhaust pipe 6 corresponding to each reciprocating coil 1, and the other end of all cooling sleeves 2 of each reciprocating coil 1 is connected to the corresponding branch exhaust pipe 6. Specifically, the adjacent ends of every two adjacent cooling sleeves 2 in each straight segment 4 are connected by an insulation pipe 7, and the two cooling sleeves 2 located at both ends of the straight segment 4 are respectively connected to the corresponding branch inlet pipe 5 and branch exhaust pipe 6 through another insulation pipe 7. The insulation pipe 7 adopts a double-layer structure, with a thin copper tube inside and a high-temperature resistant heat-insulating plastic outside, to prevent the low-temperature cold air from absorbing too much heat during the process of passing through the insulation pipe 7. In addition, all cooling sleeves 2 in this embodiment adopt the same structure as the insulation pipe 7, that is, the inside is made of pure copper pipe and the outside is wrapped with high temperature resistant heat insulation plastic, which can avoid absorbing too much heat from the environment during the cooling process.

[0018] This embodiment includes a cold source and a temperature control pipeline. The cold source uses low-temperature nitrogen, which is low-cost, readily available, and does not pollute the environment. The specific structure of the temperature control pipeline is as follows: like Figure 3 As shown, the temperature control piping includes a distribution pipe, a booster pipe, an overflow pipe, and a controller. The controller is a PLC controller, which is electrically connected to the air conditioning system and directly reads the real-time temperature of the outdoor unit from the air conditioning system. The controller integrates a networking module, which enables remote connection with a cloud server and control terminal for remote control and data exchange. The distribution pipe is connected to each of the branch intake pipes 5, and each branch intake pipe 5 is equipped with a proportional distribution solenoid valve between itself and the distribution pipe. The proportional distribution solenoid valve controls the amount of cooling gas entering different branch intake pipes 5. The booster pipe connects the cold source and the distribution pipe and is equipped with a booster pump. The output of the controller is electrically connected to the booster pump and all the proportional distribution solenoid valves, and the input is electrically connected to the air conditioning system.

[0019] This embodiment also provides a remote cryogenic gas cooling control method. After the air conditioning system is running, the control method is as follows: S1. The controller obtains the real-time temperature of the condenser from the air conditioning system and sends it to the cloud server and control terminal via the network module. S2. The control terminal remotely sets the start-up temperature, booster power parameters of the booster pump, and step opening parameters of the proportional distribution solenoid valve. The branch intake pipe 5, which is closer to the condenser cooling fan, has a smaller cooling gas intake (because the temperature of the reciprocating coil 1, which is closer to the condenser cooling fan, is relatively low, and the required cooling range is relatively small). That is, the branch intake pipe 5, which is farther away from the cooling fan, requires a greater cooling range and more cooling gas, and the corresponding proportional distribution solenoid valve opening is larger, thus forming a step opening parameter with increasingly larger openings.

[0020] S3. When the real-time temperature sent by the air conditioning system approaches the thermal protection temperature and reaches the activation temperature, the controller automatically starts the booster pump according to the booster power parameters set in S2, and simultaneously automatically opens the proportional distribution solenoid valve according to the step opening parameters. Low-temperature nitrogen flows through the reciprocating coil 1 in a proportional manner to cool the heat exchange tube group in stages. The nitrogen after absorbing heat is discharged through the exhaust pipe group, but in order to reduce exhaust noise, a silencer pipe 8 is connected to the end of each branch exhaust pipe 6.

[0021] S4. When the real-time temperature sent by the air conditioning system is lower than the start-up temperature, the controller automatically shuts off the booster pump and the proportional distribution solenoid valve, disconnecting the cooling gas. If the real-time temperature sent by the air conditioning system remains higher than the start-up temperature for 15 minutes, the controller requests a larger step opening parameter from the cloud server. The cloud server then sends this step opening parameter to the control terminal for confirmation. After confirmation by the control terminal, the cloud server sends a permission command to the controller. The controller then increases the proportional distribution solenoid valve opening according to the larger step opening parameter, thereby improving the cooling effect on the heat exchanger tube assembly.

[0022] S5. If the real-time temperature sent by the air conditioning system approaches the thermal protection temperature again and reaches the activation temperature, then execute S3 and S4 to keep the condenser temperature below the overheating temperature.

[0023] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model, and they should all be covered within the scope of the claims and specification of this utility model.

Claims

1. A remote cryogenic gas cooling system, characterized in that: The heat exchange tube assembly includes multiple rows of overlapping reciprocating coils, and multiple cooling sleeves are fitted along the length of each reciprocating coil. Each cooling sleeve is sealed and fixedly connected to the corresponding reciprocating coil. It includes an inlet pipe group and an exhaust pipe group located at both ends of the heat exchange tube group. The inlet pipe group includes a branch inlet pipe corresponding to each reciprocating coil, and one end of all the cooling sleeves of each reciprocating coil is connected to the corresponding branch inlet pipe. The exhaust pipe group includes a branch exhaust pipe corresponding to each reciprocating coil, and the other end of all the cooling sleeves of each reciprocating coil is connected to the corresponding branch exhaust pipe. It includes a cold source and a temperature control pipeline. The low-temperature gas of the cold source is connected to the air intake pipe group through the temperature control pipeline, and the connection and disconnection between the low-temperature gas and the air intake pipe group are controlled by the temperature control pipeline.

2. The remote cryogenic gas cooling system according to claim 1, characterized in that: Each reciprocating coil includes curved sections and straight sections. Each pair of adjacent reciprocating coils overlaps, so that all the straight sections of each pair of adjacent reciprocating coils are aligned.

3. The remote cryogenic gas cooling system according to claim 2, characterized in that: All cooling sleeves of each reciprocating coil are evenly and equally distributed on the corresponding straight segment, and each straight segment is equipped with at least three cooling sleeves.

4. The remote cryogenic gas cooling system according to claim 3, characterized in that: In each straight section, the adjacent ends of every two adjacent cooling sleeves are connected by an insulation pipe. The two cooling sleeves located at both ends of the straight section are connected to the corresponding branch intake pipe and branch exhaust pipe through other insulation pipes.

5. A remote cryogenic gas cooling system according to claim 4, characterized in that: The temperature control pipeline includes a distribution pipeline, a booster pipeline, an overflow pipeline, and a controller; the distribution pipeline is connected to all branch intake pipes in a one-to-one correspondence, and each branch intake pipe is equipped with a proportional distribution solenoid valve between it and the distribution pipeline; the booster pipeline is connected between the cold source and the distribution pipeline, and the booster pipeline is equipped with a booster pump; the output terminal of the controller is electrically connected to the booster pump and all the proportional distribution solenoid valves respectively.

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