Blocking device, heat exchanger and heat exchanger control method

Abstract

The invention provides a blocking device, a heat exchanger and a heat exchanger control method.The blocking device comprises a blocking component, and the blocking component is movably arranged in a mounting cavity so that the mounting cavity can be in a communicating state or a blocking state; the pressure detection part is arranged on the mounting shell, the pressure detection end of the pressure detection part is located in the mounting cavity so as to detect the real-time pressure value in the mounting shell, and when the real-time pressure value is larger than a first set value or smaller than a second set value, the blocking part is controlled to move so as to block the mounting shell; according to the technical scheme, the structure is simple, maintenance and replacement are easy, excessive interference on daily operation of the air conditioner is avoided, the reliability and safety of the air conditioner are improved, it is ensured that the air conditioner can still keep the basic operation capacity and wait for maintenance of professionals even under the emergency condition of refrigerant leakage, and the service life of the air conditioner is prolonged. And inconvenience and loss caused by maintenance and shutdown are reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of gas leakage, and in particular to a barrier device, a heat exchanger and a heat exchanger control method. Background Art

[0002] With the increasing global environmental awareness and strict restrictions on greenhouse gas emissions, more and more countries and companies are turning to environmentally friendly refrigerants to reduce damage to the ozone layer and reduce the potential impact of global warming. However, these refrigerants are flammable and explosive, and their density is usually greater than that of air, which increases the safety risks in use to a certain extent.

[0003] Considering that air conditioning equipment is often installed at a higher position or on the top of a building, once the refrigerant leaks, due to its heavier than air characteristics, the leaked gas will spread downward along the direction of gravity and gradually gather at the bottom of the building or in areas where air is not circulating. When the concentration of flammable refrigerant reaches the explosion limit, there is a serious risk of combustion or explosion, which may not only damage the building, but also seriously threaten the lives of people.

[0004] To address this challenge, current air conditioning systems will immediately activate a safety mechanism when a refrigerant leak occurs, cutting off the power supply to the air conditioning system to prevent explosions caused by electrical sparks. However, this approach has an obvious limitation: even if the air conditioning system loses power, the leaked refrigerant will continue to spread, especially when the refrigerant density is greater than that of air, which increases the risk of flammable refrigerant gathering indoors. In addition, after the air conditioning system loses power, its normal operating function is also interrupted until maintenance is completed, which may cause significant economic losses and inconvenience in some scenarios (such as commercial places). Summary of the invention

[0005] The main purpose of the present invention is to provide a barrier device, a heat exchanger and a heat exchanger control method to solve the problem in the prior art of using power cut-off to solve the refrigerant leakage and causing the air conditioning system to stop operating.

[0006] In order to achieve the above object, according to one aspect of the present invention, a barrier device is provided, the barrier device comprising:

[0007] An installation housing having an installation cavity;

[0008] A blocking component, which is movably disposed in the installation cavity to put the installation cavity in a connected state or a blocked state;

[0009] The pressure detecting component is arranged on the mounting shell, and the pressure detecting end of the pressure detecting component is in the mounting cavity to detect the real-time pressure value in the mounting shell, so as to control the movement of the blocking component to block the mounting shell when the real-time pressure value is greater than the first set value or less than the second set value.

[0010] Furthermore, the barrier device also includes: a signal receiver, which is arranged on the installation shell and is used to receive a refrigerant gas leakage signal, so as to control the pressure detection component to detect the real-time pressure value in the installation shell when the refrigerant gas leakage signal is received.

[0011] Furthermore, the barrier device also includes: an alarm component, which is arranged on the mounting shell and connected to a signal receiver so that when the signal receiver receives a refrigerant gas leakage signal, an alarm warning is issued through the alarm component.

[0012] Furthermore, the barrier device also includes: a flow detection component, which is arranged on the installation shell to detect the real-time flow of the cold gas flowing through the installation cavity.

[0013] Furthermore, the barrier device also includes a display component, which is arranged on the outside of the heat exchanger. The display component is connected to the barrier component and / or the flow detection component and / or the pressure detection component to display the working status of the barrier component and / or the real-time flow of the refrigerant gas and / or the branch of the refrigerant gas leakage, and the working status includes an open state and a closed state.

[0014] Further, the mounting housing comprises a first pipe segment, a second pipe segment and a third pipe segment connected in sequence, the cross-sectional area of ​​the second pipe segment is larger than the cross-sectional area of ​​the first pipe segment and larger than the cross-sectional area of ​​the third pipe segment, and the blocking component is movably arranged on the second pipe segment; and / or,

[0015] The cross-sectional area of ​​the first pipe segment is equal to the cross-sectional area of ​​the third pipe segment.

[0016] Further, the cross-sectional area of ​​one end of the second pipe segment connected to the first pipe segment gradually increases in the direction from the first pipe segment to the second pipe segment; and / or,

[0017] The cross-sectional area of ​​one end where the second pipe segment is connected to the third pipe segment gradually increases in a direction from the third pipe segment to the second pipe segment.

[0018] According to another aspect of the present invention, a heat exchanger is provided. The heat exchanger includes a cold gas pipeline and a blocking device arranged on the cold gas pipeline. The blocking device is the blocking device as described above.

[0019] Furthermore, the heat exchanger includes a refrigerant gas detection component, which is connected to a signal receiver of the barrier device to detect refrigerant gas leakage on the refrigerant gas pipeline and send a refrigerant gas leakage signal to the signal receiver.

[0020] According to another aspect of the present invention, a control method for a heat exchanger is provided. The control method is applied to the above heat exchanger, and the control method comprises:

[0021] Check whether there is any cold gas leakage in the heat exchanger;

[0022] When a refrigerant gas leak is detected, the corresponding refrigerant gas pipeline where the refrigerant gas leak occurs in the heat exchanger is obtained, and the refrigerant gas pipeline is blocked.

[0023] Furthermore, the steps of obtaining the corresponding refrigerant gas pipeline where the refrigerant gas leak occurs in the heat exchanger and blocking the refrigerant gas pipeline include:

[0024] Detect the real-time pressure value in each cold gas pipeline of the heat exchanger;

[0025] When it is determined that the real-time pressure value of the refrigerant gas pipeline is greater than the first predetermined value, the refrigerant gas pipeline is blocked.

[0026] By applying the technical solution of the present invention, it is possible to effectively monitor and control the refrigerant leakage of the heat exchanger branch through the structural design of the mounting shell, the barrier component and the pressure detection component. The mounting shell provides an installation environment for the barrier component and the pressure detection component, and the movable characteristics of the barrier component ensure that it can respond quickly when receiving a signal to achieve accurate blocking of the leakage branch. It is particularly important that the pressure detection component can detect the pressure value in the mounting shell in real time, and judge whether a refrigerant leakage occurs by comparing the detected real-time pressure value with the preset first set value and the second set value. This design ensures the system's sensitivity and response speed to leakage, avoids potential explosion or fire risks caused by refrigerant leakage, and ensures the safety of the use environment.

[0027] When abnormal pressure is detected, the pressure detection component can immediately control the blocking component to move to the blocking state, cut off the flow connection between the leaking branch and other normal branches, thereby avoiding further diffusion of the refrigerant inside the heat exchanger, effectively preventing the refrigerant leakage from affecting the air conditioner's operating efficiency and potential harm to personnel. In addition, the device has a simple structure, is easy to maintain and replace, and will not cause excessive interference to the daily operation of the air conditioner, improving the reliability and safety of the air conditioner, ensuring that even in an emergency situation of refrigerant leakage, the air conditioner can still maintain basic operating capabilities and wait for professional personnel to perform maintenance, reducing the inconvenience and losses caused by maintenance downtime. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] The drawings constituting a part of the present application are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0029] Figure 1 A schematic diagram showing the interior of a heat exchanger and the arrangement of cold gas pipelines according to an embodiment of the present application is shown;

[0030] Figure 2 A schematic diagram of a barrier device according to an embodiment of the present application is shown.

[0031] The above drawings include the following reference numerals:

[0032] 1. Gas detector; 2. Cold gas pipeline; 3. Heat exchanger; 4. Barrier component; 5. Pressure detection component; 6. First pipe section; 7. Second pipe section; 8. Third pipe section; 9. Mounting shell; 10. Signal receiver. DETAILED DESCRIPTION

[0033] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0034] With the increasing global environmental awareness and strict restrictions on greenhouse gas emissions, more and more countries and companies are turning to environmentally friendly refrigerants to reduce damage to the ozone layer and reduce the potential impact of global warming. However, these refrigerants are flammable and explosive, and their density is usually greater than that of air, which increases the safety risks in use to a certain extent.

[0035] Considering that air conditioning equipment is often installed at a higher position or on the top of a building, once the refrigerant leaks, due to its heavier than air characteristics, the leaked gas will spread downward along the direction of gravity and gradually gather at the bottom of the building or in areas where air is not circulating. When the concentration of flammable refrigerant reaches the explosion limit, there is a serious risk of combustion or explosion, which may not only damage the building, but also seriously threaten the lives of people.

[0036] To address this challenge, current air conditioning systems will immediately activate a safety mechanism when a refrigerant leak occurs, cutting off the power supply to the air conditioning system to prevent explosions caused by electrical sparks. However, this approach has an obvious limitation: even if the air conditioning system loses power, the leaked refrigerant will continue to spread, especially when the refrigerant density is greater than that of air, which increases the risk of flammable refrigerant gathering indoors. In addition, after the air conditioning system loses power, its normal operating function is also interrupted until maintenance is completed, which may cause significant economic losses and inconvenience in some scenarios (such as commercial places).

[0037] Therefore, the main purpose of the present application is to provide a barrier device, a heat exchanger and a control method for the heat exchanger, so as to solve the problem in the prior art of using the method of cutting off the power supply to solve the refrigerant leakage and causing the air-conditioning system to stop operating.

[0038] The present application first provides a barrier device, including a mounting shell 9, wherein the mounting shell 9 has a mounting cavity;

[0039] A blocking member 4, which is movably disposed in the installation cavity to put the installation cavity in a connected state or a blocked state;

[0040] The pressure detecting component 5 is arranged on the mounting shell 9, and the pressure detecting end of the pressure detecting component 5 is in the mounting cavity to detect the real-time pressure value in the mounting shell 9, so as to control the movement of the blocking component 4 to block the mounting shell 9 when the real-time pressure value is greater than the first set value or less than the second set value.

[0041] Specifically, Figure 1 and Figure 2 As shown, the blocking component 4 is a key element for realizing the heat exchanger shunt blocking in the present invention. It is designed to be movably arranged in the installation cavity. This design enables the blocking component 4 to switch between two states: a connected state and a blocked state. When in the connected state, the blocking component 4 will not hinder the normal flow of the refrigerant in the shunt, thereby ensuring the normal operation of the air conditioner. When in the blocked state, the blocking component 4 will seal the installation cavity to prevent the refrigerant from leaking to other non-leaking shunts, thereby effectively controlling the scope of refrigerant leakage and reducing safety hazards. The pressure detection component 5 is arranged on the installation shell 9, and its function is to detect the real-time pressure value in the installation shell 9. By providing a special pressure detection terminal on the installation shell 9, the accuracy and timeliness of the detection result are ensured. When the detected real-time pressure value exceeds the preset first set value (this usually indicates that the refrigerant pressure is abnormally high, which may be due to local pressure accumulation caused by overcharging or leakage of the refrigerant) or is lower than the second set value (this usually indicates that the refrigerant pressure is abnormally low, which may be due to leakage causing a reduction in the amount of refrigerant), the pressure detection component 5 will send a control signal to the blocking component 4, triggering the movement of the blocking component 4, thereby blocking the installation cavity and immediately preventing further leakage of the refrigerant. This design can quickly respond to abnormal refrigerant leakage, effectively control the leakage point, and ensure the safety and stability of the air-conditioning system.

[0042] The present invention realizes timely detection and effective control of flammable refrigerant leakage by using a movable barrier component 4 and a precise pressure detection component 5. When the refrigerant leaks, the leakage branch can be quickly blocked to prevent the refrigerant from spreading in the air-conditioning system, which not only ensures the personal safety of the use site, but also effectively prevents air conditioner failures caused by refrigerant leakage, reduces maintenance costs and downtime, and improves the availability and user experience of the air-conditioning system. In addition, by setting the first and second pressure thresholds, it is possible to adapt to pressure changes under different working conditions, making the response of the barrier component 4 more intelligent, avoiding unnecessary misoperation, and further improving the reliability of system operation.

[0043] Furthermore, the barrier device also includes: a signal receiver 10, which is arranged on the installation shell 9, and the signal receiver 10 is used to receive a refrigerant gas leakage signal, so as to control the pressure detection component 5 to detect the real-time pressure value in the installation shell 9 when the refrigerant gas leakage signal is received.

[0044] Specifically, the signal receiver 10 and the pressure detection element 5 can achieve a faster and more accurate leakage response when used in conjunction. When the gas sensor detects a refrigerant leak and sends a signal, the signal receiver 10 responds quickly and activates the pressure detection element 5 for pressure monitoring. If the pressure detection element 5 detects an abnormal pressure inside the mounting housing 9, indicating that the refrigerant leak occurs in this branch, the signal receiver 10 will immediately control the barrier component 4 to close to prevent further leakage of the refrigerant.

[0045] The signal receiver 10 in the present application can respond to the leakage signal immediately, which greatly improves the reaction speed of the system and ensures that the leakage point can be identified and blocked within a few seconds to more than ten seconds after the refrigerant leakage occurs, thereby quickly eliminating the safety hazard. Through the accurate identification of the leakage point by the pressure detection member 5, it is possible to accurately determine which branch has leaked, avoiding the blind blocking of the entire heat exchanger system, reducing the closure of unnecessary branches, and maintaining the efficient operation of the air conditioner. This design can not only effectively prevent the leaked refrigerant from entering the indoor environment and reducing the threat to human health, but also prevent the refrigerant from gathering inside the air conditioner, greatly reducing the risk of fire and explosion. Through pressure detection and branch blocking, maintenance personnel can locate the leakage point more quickly, and only need to replace or repair the pipeline of the leaking branch, without restarting the entire air conditioning system, reducing maintenance costs and time. The arrangement of the signal receiver 10 and the pressure detection member 5 of the device makes the system compatible with existing gas sensors and heat exchanger structures, and easy to upgrade and install in existing air conditioning systems.

[0046] Furthermore, the barrier device also includes: an alarm component, which is arranged on the mounting shell 9 and connected to the signal receiver 10, so that when the signal receiver 10 receives the refrigerant gas leakage signal, the alarm component sends an alarm warning.

[0047] Specifically, in order to improve the safety and response efficiency of the system, the barrier device in the heat exchanger flow path barrier system of the present invention not only has the above-mentioned refrigerant leakage identification and flow path blocking functions, but also integrates an alarm component. The alarm component is arranged on the mounting shell 9 of the device and is electrically connected to the signal receiver 10. When the gas detection component detects a refrigerant leak and sends a signal to the signal receiver 10, the signal receiver 10 not only triggers the barrier component 4 to block, but also immediately activates the alarm component to send out an audible and visual alarm or a wireless alarm signal (the specific alarm method can be flexibly selected according to the actual application scenario, such as audible and visual alarm, wireless signal alarm to the remote monitoring center, etc.), so as to quickly notify nearby personnel to evacuate and maintenance personnel to respond in time. This flow path barrier device with integrated alarm function can achieve immediate response and early warning to refrigerant leakage events, effectively avoiding potential health risks and explosion hazards caused by the failure to detect the leakage in time. The setting of the alarm component enables not only the physical isolation of the leakage point to be immediately performed after the signal receiver 10 recognizes the leakage signal, but also the relevant personnel to be notified immediately, thereby ensuring the safety of personnel, accelerating the maintenance response speed, reducing the unplanned downtime, and further improving the safety and reliability of the air conditioner when using flammable refrigerants. Among them, the implementation form of the alarm component is not limited to the sound and light alarm, and can be a communication module that sends the alarm information to the remote monitoring center through a wireless signal, or an intelligent module that integrates a voice alarm function, or through a connection with a mobile phone application or other remote terminal device, to achieve remote instant notification of the leakage event. In addition, the triggering logic of the alarm component can also be further optimized, for example, a hierarchical alarm can be set, when the pressure change detected by the pressure detection member 5 exceeds a preset threshold, a first-level alarm is triggered, when the leakage duration reaches a certain condition (wherein the certain condition can be the cumulative leakage time or the concentration of the leaked cold gas reaches a set value), a second-level alarm is triggered, and so on, to manage the response to the leakage event in a more refined way.

[0048] The barrier device further comprises: a flow detection component, which is arranged on the mounting housing 9 to detect the real-time flow of the cold gas flowing through the mounting cavity; and / or,

[0049] Display component, the display component is arranged on the outside of the heat exchanger 3, the display component is connected with the blocking component 4 and / or the flow detection component and / or the pressure detection component 5 to display the working status of the blocking component 4 and / or the real-time flow of the refrigerant gas and / or the branch of the refrigerant gas leakage, and the working status includes an open state and a closed state.

[0050] Specifically, the heat exchanger barrier device of the present application also includes a flow detection component and a display component. The flow detection component is arranged on the mounting housing 9, which can accurately measure the real-time flow rate of the refrigerant flowing through each branch. This function is particularly critical for timely detection of refrigerant leakage, because abnormal changes in flow often indicate the occurrence of leakage. The display component is installed on the outside of the heat exchanger, which is connected to the barrier component 4, the flow detection component and the pressure detection component 5, and is used to display the working state of the barrier component 4 (i.e., whether it has been closed), the real-time flow rate of the refrigerant and the specific branch where the leakage occurs in real time. When the gas detection component detects a refrigerant leakage, after the signal receiver 10 receives the signal, not only will the pressure detection component 5 identify the leakage branch, but the flow detection component will also be started to monitor the flow changes of each branch. Once the flow abnormality is found, the system will respond quickly, alert the user through the display component, and activate the barrier component 4 to block the branch. This process ensures that even in the extreme case where the pressure sensor cannot identify the leakage, the system can respond in time through the flow abnormality, which greatly enhances the safety and reliability of the system, wherein the gas detection component in the present application can be a gas sensor.

[0051] Through real-time flow detection, the device of the present invention can detect refrigerant leakage earlier, and can respond promptly through flow changes even in the early stage of leakage, avoiding large amounts of refrigerant accumulation indoors, further reducing safety hazards. The addition of the display component allows the user to intuitively understand the working status of the barrier component 4 and the specific location of the refrigerant leakage, which is convenient for quickly locating the problem and taking measures, reducing maintenance delays caused by unclear information. Users can understand the system status by checking the display component without complicated operations, reducing the possibility of misoperation and making system maintenance and management simpler and more efficient. The barrier device in the present application can automatically monitor and block leaks, while providing real-time flow and status display, allowing users to feel more at ease when using the air conditioner, improving the user satisfaction and market competitiveness of the product.

[0052] Further, the mounting housing 9 comprises a first pipe segment 6, a second pipe segment 7 and a third pipe segment 8 which are connected in sequence, the cross-sectional area of ​​the second pipe segment 7 is larger than the cross-sectional area of ​​the first pipe segment 6 and larger than the cross-sectional area of ​​the third pipe segment 8, and the blocking component 4 is movably arranged on the second pipe segment 7; and / or,

[0053] The cross-sectional area of ​​the first pipe section 6 is equal to the cross-sectional area of ​​the third pipe section 8 .

[0054] Furthermore, the cross-sectional area of ​​one end of the second pipe segment 7 connected to the first pipe segment 6 gradually increases in the direction from the first pipe segment 6 to the second pipe segment 7; and / or,

[0055] The cross-sectional area of ​​one end where the second pipe segment 7 is connected to the third pipe segment 8 gradually increases in the direction from the third pipe segment 8 to the second pipe segment 7 .

[0056] Specifically, in a further embodiment of the present invention, the mounting housing 9 is designed to have three pipe sections: a first pipe section 6, a second pipe section 7 and a third pipe section 8, which are connected in sequence. Among them, the cross-sectional area of ​​the second pipe section 7 is larger than the cross-sectional areas of the first pipe section 6 and the third pipe section 8. This design provides a wider operating space for the blocking component 4, so that it can move more effectively in the second pipe section 7 to achieve rapid blocking of the flow path. In addition, the first pipe section 6 and the third pipe section 8 have equal cross-sectional areas, which ensures the smooth flow of the refrigerant when no leakage occurs, reduces pressure loss, and improves the operating efficiency of the air conditioner. In order to further optimize the movement and positioning of the blocking component 4, the cross-sectional area of ​​the end of the second pipe section 7 connected to the first pipe section 6 and the end connected to the third pipe section 8 is designed to gradually increase from the connection to the second pipe section 7. This gradual change in the cross-sectional area of ​​the pipe section makes it easier for the blocking component 4 to form a seal with the pipe wall when closed, and can move smoothly when opened, reducing friction and extending the life of the device.

[0057] In this embodiment, by optimizing the structure of the mounting shell 9, that is, using the second pipe section 7 with a large cross section and the first pipe section 6 and the third pipe section 8 with a small cross section connected in sequence, it is possible to ensure the normal flow of the refrigerant while providing a wider movement space for the barrier component 4, so that it can respond to the signal of the gas detection component and block the flow path more quickly and effectively. The gradual pipe section cross-sectional area design is not only conducive to the positioning and sealing of the barrier component 4, but also reduces its friction during movement, thereby improving the reliability and durability of the barrier device and reducing maintenance costs.

[0058] The present application also provides a heat exchanger, which includes a cold gas pipeline 2 and a barrier device arranged on the cold gas pipeline 2, wherein the barrier device is the barrier device as described above.

[0059] Furthermore, the heat exchanger 3 includes a refrigerant gas detection component, which is connected to the signal receiver 10 of the barrier device to detect refrigerant gas leakage on the refrigerant gas pipeline 2 and send a refrigerant gas leakage signal to the signal receiver 10 .

[0060] Furthermore, the refrigerant gas detection component is a gas detector 1 for detecting refrigerant gas.

[0061] Specifically, the present invention also provides a heat exchanger, which is designed with a refrigerant gas pipeline 2, on which a barrier device is installed, and the barrier device is the above-mentioned heat exchanger flow path barrier device. In order to further improve the safety performance of the heat exchanger, the present invention integrates a refrigerant gas detection component in the heat exchanger 3, and this component is designed as a gas detector 1, which establishes a communication connection with the signal receiver 10 of the barrier device. When the gas detector 1 detects a refrigerant gas leak in the refrigerant gas pipeline 2, it will immediately send a leakage signal to the signal receiver 10. After receiving the signal, the signal receiver 10 starts the pressure detection component 5 to perform pressure abnormality detection. After confirming that the leak occurs in the refrigerant gas pipeline 2, the barrier component 4 is controlled to close, blocking the leaking refrigerant gas pipeline 2, ensuring that the refrigerant gas will not spread further, and at the same time ensuring that the non-leaking part of the refrigerant gas pipeline 2 continues to work normally.

[0062] The heat exchanger design with integrated refrigerant gas detection components and barrier devices can not only automatically monitor refrigerant gas leaks, but also respond quickly after detecting a leak, and block the leaking pipeline by closing the barrier component 4, effectively avoiding the continuous leakage of refrigerant gas, reducing the impact on the environment and the threat to personal safety. This design greatly improves the safety and reliability of the heat exchanger 3 when using flammable refrigerants, especially in industrial or domestic environments, and can effectively prevent safety accidents such as fires or explosions caused by refrigerant gas leaks. At the same time, since the refrigerant gas pipeline 2 that has not leaked can continue to operate normally, the continuous and efficient operation of the heat exchanger is ensured, and the stability and cooling effect of the entire system will not be affected by the failure of a single pipeline, reducing maintenance costs and downtime.

[0063] The present application also provides a method for controlling a heat exchanger. The method for controlling a heat exchanger includes the heat exchanger as described above. The method for controlling a heat exchanger includes:

[0064] Check whether there is any cold gas leakage in the heat exchanger;

[0065] When a refrigerant gas leak is detected, the corresponding refrigerant gas pipeline where the refrigerant gas leak occurs in the heat exchanger is obtained, and the refrigerant gas pipeline is blocked;

[0066] Specifically, the steps of obtaining the corresponding refrigerant gas pipeline where the refrigerant gas leaks in the heat exchanger and blocking the refrigerant gas pipeline include:

[0067] Detect the real-time pressure value in each cold gas pipeline of the heat exchanger;

[0068] When it is determined that the real-time pressure value of the refrigerant gas pipeline is greater than the first predetermined value, the refrigerant gas pipeline is blocked.

[0069] Specifically, the present embodiment also provides a control method for a heat exchanger, which, combined with the above-mentioned barrier device, can realize accurate and rapid identification and isolation of refrigerant leakage. The specific steps are as follows: The gas sensor continuously monitors the concentration of combustible refrigerant in the environment around the heat exchanger. Under normal operating conditions, the gas sensor will not detect abnormal concentrations of combustible refrigerant. Once the gas sensor detects the presence of refrigerant gas, it is determined that the refrigerant has leaked, and a refrigerant leakage signal is immediately generated. The signal receiver 10 in the barrier device receives the refrigerant leakage signal from the gas detector 1, and then the pressure detection component 5 starts to detect the real-time pressure value of the branch where it is located. The real-time pressure value is compared with the pressure range when the heat exchanger is operating normally. If the real-time pressure value is greater than the first predetermined value, the pressure sensor will generate a pressure signal. When the signal receiver 10 receives the pressure signal, the barrier component 4 is controlled to act, thereby blocking the leaking refrigerant gas pipeline 2. The closure of the barrier component 4 can be achieved by a solenoid valve, a pneumatic valve or a mechanical linkage mechanism to ensure that the refrigerant flow path is quickly and reliably cut off. When the leaking branch is blocked, other branches are not affected and continue to operate normally, maintaining the cooling / heating efficiency of the air conditioner. The first set value and the second set value can be obtained based on experience, and there is no limitation on their specific sources.

[0070] The barrier method in the present application can respond to refrigerant leakage incidents in a timely manner, accurately identify and quickly isolate the leaking branches, effectively prevent the continuous discharge of flammable refrigerants into the room, and avoid threats to human health and increased explosion risks. Through branch blocking, branches that have not leaked can continue to operate normally. Even in the event of a single or multiple branches leaking, the air conditioner as a whole can still maintain a certain degree of cooling / heating efficiency until maintenance personnel conduct on-site processing. The structural design of the barrier device is simple, easy to install and maintain, and there is no need to power off or restart the entire machine during maintenance, which improves maintenance efficiency and safety. It avoids unit shutdown and refrigerant replenishment costs caused by large-scale refrigerant leakage, and reduces the overall cost of air conditioner operation and maintenance. It reduces the potential impact of refrigerant leakage on the environment, conforms to the trend of environmental protection, and improves the environmental performance of air conditioners when using flammable refrigerants.

[0071] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0072] Unless otherwise specifically stated, the relative arrangement of the parts and steps described in these embodiments, numerical expressions and numerical values ​​do not limit the scope of the present invention. At the same time, it should be understood that, for ease of description, the sizes of the various parts shown in the accompanying drawings are not drawn according to the actual proportional relationship. The technology, method and equipment known to ordinary technicians in the relevant field may not be discussed in detail, but in appropriate cases, the technology, method and equipment should be regarded as a part of the authorization specification. In all examples shown and discussed here, any specific value should be interpreted as being merely exemplary, rather than as a limitation. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters represent similar items in the following drawings, so once a certain item is defined in an accompanying drawing, it does not need to be further discussed in subsequent drawings.

[0073] In the description of the present invention, it is necessary to understand that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the drawings. They are only for the convenience of describing the present invention and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the devices or elements referred to must have a specific direction or be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the scope of protection of the present invention. The directional words "inside and outside" refer to the inside and outside relative to the contours of each component itself.

[0074] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used here to describe the spatial positional relationship between a device or feature and other devices or features as shown in the figure. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figure. For example, if the device in the accompanying drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0075] In addition, it should be noted that the use of terms such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. If not otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of the present invention.

[0076] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A barrier device, characterized in that: include: An installation shell (9), wherein the installation shell (9) has an installation cavity; a blocking component (4), the blocking component (4) being movably disposed in the installation cavity so as to place the installation cavity in a connected state or a blocked state; A pressure detection component (5), wherein the pressure detection component (5) is arranged on the mounting shell (9), and the pressure detection end of the pressure detection component (5) is located in the mounting cavity to detect the real-time pressure value in the mounting shell (9), so as to control the movement of the blocking component (4) to block the mounting shell (9) when the real-time pressure value is greater than a first set value or less than a second set value.

2. The barrier device according to claim 1, characterized in that: The barrier device also includes: A signal receiver (10), wherein the signal receiver (10) is arranged on the installation shell (9), and the signal receiver (10) is used to receive a refrigerant gas leakage signal, so as to control the pressure detection component (5) to detect the real-time pressure value in the installation shell (9) when the refrigerant gas leakage signal is received.

3. The barrier device according to claim 2, characterized in that: The barrier device also includes: An alarm component is arranged on the mounting shell (9), and the alarm component is connected to the signal receiver (10) so that when the signal receiver (10) receives the refrigerant gas leakage signal, an alarm warning is issued through the alarm component.

4. The barrier device according to claim 1, characterized in that: The barrier device also includes: A flow detection component is arranged on the installation shell (9) to detect the real-time flow of the cold gas flowing through the installation cavity.

5. The barrier device according to claim 4, characterized in that: The barrier device also includes: A display component is arranged outside the heat exchanger (3), and the display component is connected to the blocking component (4) and / or the flow detection component and / or the pressure detection component (5) to display the working status of the blocking component (4) and / or the real-time flow of the refrigerant gas and / or the branch of the refrigerant gas leakage, wherein the working status includes an open state and a closed state.

6. The barrier device according to claim 1, characterized in that: The mounting housing (9) comprises a first pipe section (6), a second pipe section (7) and a third pipe section (8) which are connected in sequence, the cross-sectional area of ​​the second pipe section (7) is larger than the cross-sectional area of ​​the first pipe section (6) and larger than the cross-sectional area of ​​the third pipe section (8), and the blocking component (4) is movably arranged on the second pipe section (7); and / or The cross-sectional area of ​​the first pipe section (6) is equal to the cross-sectional area of ​​the third pipe section (8).

7. The barrier device according to claim 6, characterized in that: The cross-sectional area of ​​one end of the second pipe section (7) connected to the first pipe section (6) gradually increases in the direction from the first pipe section (6) to the second pipe section (7); and / or, The cross-sectional area of ​​one end of the second pipe section (7) connected to the third pipe section (8) gradually increases in the direction from the third pipe section (8) to the second pipe section (7).

8. A heat exchanger (3), comprising a cold gas pipeline (2) and a blocking device arranged on the cold gas pipeline (2), characterized in that: The barrier device is the barrier device according to any one of claims 1 to 7.

9. The heat exchanger (3) according to claim 8, characterized in that The heat exchanger (3) comprises a refrigerant gas detection component, which is connected to the signal receiver (10) of the barrier device to detect refrigerant gas leakage on the refrigerant gas pipeline (2) and send a refrigerant gas leakage signal to the signal receiver (10).

10. A method for controlling a heat exchanger, characterized in that: The control method of the heat exchanger is applied to the heat exchanger according to claim 8 or 9, and the control method of the heat exchanger comprises: Detecting whether there is refrigerant gas leakage in the heat exchanger; When the refrigerant gas is detected to be leaking, the corresponding refrigerant gas pipeline where the refrigerant gas is leaking in the heat exchanger is obtained, and the refrigerant gas pipeline is blocked.

11. The heat exchanger control method according to claim 10, characterized in that: The step of obtaining the corresponding refrigerant gas pipeline where the refrigerant gas leaks in the heat exchanger and blocking the refrigerant gas pipeline comprises: Detecting the real-time pressure value in each cold gas pipeline of the heat exchanger; When it is determined that the real-time pressure value of the refrigerant gas pipeline is greater than the first predetermined value, the refrigerant gas pipeline is blocked.

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