Air conditioner

Abstract

The utility model discloses an air conditioner, and belongs to the technical field of air conditioners. The air conditioner comprises an indoor unit comprising an indoor heat exchanger; the outdoor unit comprises a compressor and an outdoor heat exchanger; the refrigerant circulation loop enables a refrigerant to circulate in a loop formed by the compressor, the condenser and the evaporator in sequence; one of the condenser and the evaporator is an outdoor heat exchanger, and the other is an indoor heat exchanger; the fire extinguishing device comprises a photoionization detector used for detecting oil in the refrigerant leaked from the refrigerant circulation loop in real time; the fire extinguisher is connected to the refrigerant pipe of the refrigerant circulation loop through a conveying pipe, and a fire extinguishing electromagnetic valve is arranged on the conveying pipe; the electromagnetic valve assembly is arranged on the refrigerant circulation loop and used for connecting or disconnecting a refrigerant flowing path between the indoor unit and the outdoor unit. The photoionization detector is adopted, the existence of fire risk substances can be rapidly detected in the early stage of refrigerant leakage, and the fire extinguisher is used for retarding flame, so that the fire is rapidly prevented or eliminated.

Description

Technical Field

[0001] This utility model belongs to the field of air conditioning technology, and in particular relates to an air conditioner. Background Technology

[0002] With the improvement of people's living standards, air conditioners have become an indispensable electrical appliance in homes and commercial establishments. However, air conditioning systems may cause fires during operation due to aging wiring, poor contact at terminals, or short circuits caused by component failures. In particular, refrigerant leaks in air conditioning systems can easily ignite and lead to fires if exposed to electrical sparks or static electricity.

[0003] In related technologies, the fire extinguishing technology for air conditioners mainly involves infrared detection and smoke monitoring inside the air conditioner, outputting corresponding infrared detection and smoke monitoring signals, and determining whether a fire has occurred inside the air conditioner based on these detection signals. When a fire is determined to have occurred inside the air conditioner, fire extinguishing materials are released inside the air conditioner and a fire alarm is issued. However, this technology is not timely and effective in dealing with fires caused by refrigerant leaks. After a refrigerant leak, the infrared and smoke monitoring cannot react in time, and the flames caused by the refrigerant spray are jet fires, which ordinary fire extinguishing materials cannot effectively suppress.

[0004] To address the aforementioned technical issues, one approach involves using pressure sensors to monitor the refrigerant circulation loop in real time to determine if there is a refrigerant leak in the outdoor unit, and then using fire extinguishers to extinguish the fire in case of a leak. This solution can detect and assess fires caused by refrigerant leaks in advance, effectively preventing fires. However, using pressure sensors to detect refrigerant leaks cannot identify fire risks in their early stages, potentially leading to the fire escalating. Furthermore, pressure sensors may experience false alarms or missed alarms due to fluctuations in refrigeration system pressure or temperature changes, reducing the reliability of fire suppression. Especially during transportation, changes in external conditions (such as pressure fluctuations caused by bumps) can make it difficult for pressure sensors to accurately determine refrigerant leaks, affecting the reliability and accuracy of the fire suppression system. Utility Model Content

[0005] This utility model aims to at least partially solve one of the technical problems in related technologies. Therefore,

[0006] According to embodiments of this disclosure, an air conditioner is provided, comprising:

[0007] Indoor unit, including indoor heat exchanger;

[0008] Outdoor unit, including compressor and outdoor heat exchanger;

[0009] The refrigerant circulation loop allows the refrigerant to circulate sequentially through the compressor, condenser, and evaporator; one of the condenser and the evaporator is the outdoor heat exchanger, and the other is the indoor heat exchanger.

[0010] Fire extinguishing device, the fire extinguishing device comprising:

[0011] A photoionization detector is used to detect oil in the leaked refrigerant in the refrigerant circulation loop in real time.

[0012] The fire extinguisher is connected to the refrigerant pipe of the refrigerant circulation loop via a delivery pipe. The delivery pipe is equipped with a fire extinguishing solenoid valve, which is used to open or close the flow path between the fire extinguisher and the refrigerant circulation loop.

[0013] The solenoid valve assembly is located on the refrigerant pipe of the refrigerant circulation loop and is used to open or close the refrigerant flow path between the indoor unit and the outdoor unit.

[0014] When a refrigerant leak occurs in the refrigerant circulation loop, the fire extinguishing solenoid valve connects the delivery pipe to the refrigerant circulation loop. The solenoid valve assembly blocks the refrigerant flow path between the indoor unit and the outdoor unit. The extinguishing agent in the fire extinguisher enters the refrigerant circulation loop through the delivery pipe, squeezing the refrigerant out of the leak.

[0015] The above technical solution has the following advantages or beneficial effects: The use of a photoionization detector (PID) can directly detect lubricating oil mixed in during refrigerant leakage, allowing for a more direct assessment of fire risk. Furthermore, the PID is highly sensitive to leaks of lubricating oil mixed in the refrigerant, capable of detecting extremely low concentrations of leaked substances (such as ppm or ppb levels). Compared to existing pressure sensor-based refrigerant leak detection methods, this solution can quickly detect the presence of fire-risk substances in the early stages of a refrigerant leak. Simultaneously, it cuts off the refrigerant supply between the indoor and outdoor units and activates the fire extinguishing device, delivering extinguishing agent into the refrigerant pipes to dilute the refrigerant and retard it, effectively preventing or extinguishing fires and reducing the harm to personnel health and property caused by fires. Additionally, the fire extinguishing device can be an optional accessory for users, facilitating selection or recycling.

[0016] According to embodiments of this disclosure, the fire extinguishing device further includes a one-way valve disposed on the delivery pipe.

[0017] The above technical solution has the following advantages or beneficial effects: by setting a one-way valve, the backflow of extinguishing agent can be prevented, ensuring that the extinguishing agent can smoothly enter the refrigerant circulation loop and achieve effective flame retardancy.

[0018] According to an embodiment of this disclosure, the photoionization detector is disposed in the outdoor unit and is used to detect oil leaked in the refrigerant inside the outdoor unit in real time;

[0019] The outdoor heat exchanger is connected to the compressor via a second refrigerant pipe, and the fire extinguisher is connected to the second refrigerant pipe via a delivery pipe;

[0020] When a refrigerant leak occurs in the outdoor unit, the fire extinguishing solenoid valve connects the delivery pipe to the second refrigerant pipe, and the solenoid valve assembly cuts off the refrigerant flow path between the indoor unit and the outdoor unit, so that the extinguishing agent in the fire extinguisher enters the second refrigerant pipe through the delivery pipe and squeezes the refrigerant out of the leak.

[0021] The above technical solution has the following advantages or beneficial effects: by installing a photoionization detector in the outdoor unit, and in conjunction with a fire extinguisher, it can provide fire extinguishing support for outdoor unit leakage, effectively improving fire extinguishing efficiency and reducing fire hazards.

[0022] According to an embodiment of this disclosure, the photoionization detector is disposed in the indoor unit and is used to detect oil in the refrigerant leaking into the indoor unit in real time;

[0023] The indoor heat exchanger is connected to the outdoor heat exchanger via a third refrigerant pipe, the third refrigerant pipe having an indoor unit interface; the indoor heat exchanger is connected to the compressor via a first refrigerant pipe; and the fire extinguisher is connected to the indoor unit interface via a delivery pipe.

[0024] When a refrigerant leak occurs in the indoor unit, the fire extinguishing solenoid valve connects the delivery pipe to the third refrigerant pipe, and the solenoid valve assembly blocks the refrigerant flow path between the indoor unit and the outdoor unit; the extinguishing agent in the fire extinguisher enters the third refrigerant pipe, the indoor heat exchanger, and the first refrigerant pipe sequentially through the delivery pipe, forcing the refrigerant out of the leak.

[0025] The above technical solution has the following advantages or beneficial effects: by setting up a photoionization detector in the indoor unit, and working with a fire extinguisher, it can provide fire extinguishing support for indoor unit leakage, effectively improving fire extinguishing efficiency and reducing fire hazards.

[0026] According to embodiments of this disclosure, the solenoid valve assembly includes:

[0027] The first solenoid valve is used to connect the compressor to the outdoor heat exchanger and the delivery pipe.

[0028] The second solenoid valve is located on the refrigerant pipe between the compressor and the indoor heat exchanger;

[0029] The third solenoid valve is located on the refrigerant pipe between the outdoor heat exchanger and the indoor heat exchanger;

[0030] When a refrigerant leak occurs in the outdoor unit, the first solenoid valve isolates the compressor from the outdoor heat exchanger, and the third solenoid valve isolates the indoor heat exchanger from the outdoor heat exchanger, thereby cutting off the refrigerant flow path between the indoor unit and the outdoor unit.

[0031] When a refrigerant leak occurs in the indoor unit, the second solenoid valve isolates the compressor from the outdoor heat exchanger, and the third solenoid valve isolates the indoor heat exchanger from the outdoor heat exchanger, thereby cutting off the refrigerant flow path between the indoor unit and the outdoor unit.

[0032] The above technical solution has the following advantages or beneficial effects: through the cooperation of the first solenoid valve, the second solenoid valve and the third solenoid valve, regardless of whether the refrigerant leak occurs in the indoor unit or the outdoor unit, the connection between the indoor refrigerant and the outdoor refrigerant can be quickly isolated, and an independent channel can be provided for the extinguishing agent, so that the extinguishing agent can quickly cover the leak point and improve the extinguishing efficiency.

[0033] According to embodiments of this disclosure, the first solenoid valve, the second solenoid valve, and the third solenoid valve are normally open solenoid valves.

[0034] The above technical solution has the following advantages or beneficial effects: the normally open solenoid valve remains open when power is off, and is only energized to close when a leak is detected, significantly reducing energy consumption. When a refrigerant leak is detected, the normally open solenoid valve quickly cuts off the refrigerant flow path, reducing the leakage and improving fire extinguishing efficiency.

[0035] According to an embodiment of this disclosure, the delivery pipe of the fire extinguisher is detachably connected to the refrigerant pipe of the refrigerant circulation loop via a reversing valve.

[0036] The above technical solution has the following advantages or beneficial effects: the detachable connection of the reversing valve allows the fire extinguisher to be quickly disassembled and replaced, reducing the difficulty of maintenance and upgrades.

[0037] According to an embodiment of this disclosure, the outdoor unit further includes an electronic control board, which is electrically connected to the solenoid valve assembly and the fire extinguishing solenoid valve.

[0038] The above technical solution has the following advantages or beneficial effects: the solenoid valve assembly and the fire extinguishing solenoid valve are directly controlled by the outdoor unit's electronic control board, reducing the number of control units.

[0039] According to embodiments of this disclosure, the fire extinguishing device further includes an alarm device electrically connected to the electronic control board, used to issue an alarm in case of refrigerant leakage.

[0040] The above technical solution has the following advantages or beneficial effects: by setting up an alarm device, the system can immediately issue an alarm when a refrigerant leak is detected, reminding users or maintenance personnel to take timely measures to resolve the leak problem.

[0041] According to an embodiment of this disclosure, the fire extinguishing device further includes a control board electrically connected to the electrical control board, the control board being electrically connected to the fire extinguisher and used to activate the fire extinguisher.

[0042] The above technical solution has the following advantages or beneficial effects: by adding an independent control board specifically for controlling the activation of the fire extinguisher in case of refrigerant leakage, the redundancy and reliability of the fire extinguishing device are improved, and the risk of accidental release of extinguishing agent that may be caused by the fire extinguisher being constantly in the activated state can be effectively avoided.

[0043] Another aspect of this application provides an air conditioner comprising:

[0044] The outdoor unit includes:

[0045] compressor;

[0046] The outdoor heat exchanger is connected to the compressor at one end via a second refrigerant pipe, and to the indoor unit interface at the other end.

[0047] A fire extinguishing device, detachably connected to the outdoor unit, comprising:

[0048] A photoionization detector is installed in the outdoor unit to detect oil in the leaked refrigerant in the outdoor unit in real time.

[0049] A fire extinguisher has a delivery pipe, which is detachably connected to the second refrigerant pipe, and a fire extinguishing solenoid valve is installed on the delivery pipe;

[0050] A first solenoid valve is provided on the second refrigerant pipe between the delivery pipe and the compressor, and is used to open or close the refrigerant flow path between the second refrigerant pipe and the compressor;

[0051] During the transportation of the air conditioner, when the photoionization detector detects a refrigerant leak, the fire extinguishing solenoid valve connects the delivery pipe to the second refrigerant pipe. The first solenoid valve cuts off the refrigerant flow path between the second refrigerant pipe and the compressor. The extinguishing agent in the fire extinguisher enters the second refrigerant pipe through the delivery pipe, squeezing the refrigerant out of the leak.

[0052] The above technical solution has the following advantages or beneficial effects: During transportation, the outdoor unit and indoor unit of the air conditioner are transported separately, and all the refrigerant in the air conditioner is located in the outdoor unit. By installing a photoionization detector (PID) in the outdoor unit, the oil in the leaked refrigerant can be monitored in real time, thus enabling real-time detection of refrigerant leaks caused by bumps, collisions, etc., during the transportation of the outdoor unit. Once a leak is detected, the fire extinguishing device can respond quickly, and the extinguishing agent will force the refrigerant out of the leak, effectively preventing a fire. At the same time, the fire extinguishing device can be detachably connected to the outdoor unit, making it an optional device for users, facilitating user selection or recycling. Attached Figure Description

[0053] Figure 1 This is a schematic diagram of a photoionization detector installed in the outdoor unit of an air conditioner according to an embodiment of this disclosure;

[0054] Figure 2 This is a schematic diagram of a photoionization detector installed in the indoor unit of an air conditioner according to an embodiment of this disclosure;

[0055] Figure 3 This is a schematic diagram of an air conditioner according to one embodiment of the present disclosure;

[0056] Figure 4 This is a schematic diagram of an air conditioner according to another embodiment of the present disclosure;

[0057] Figure 5 This is a schematic diagram of the working process when refrigerant leakage occurs on the outdoor side of the air conditioner according to the embodiments of this disclosure;

[0058] Figure 6 This is a schematic diagram of the working process when refrigerant leakage occurs on the indoor side of the air conditioner according to the embodiments of this disclosure;

[0059] Figures 7-9 Schematic diagrams of air conditioners according to different embodiments of this disclosure;

[0060] Figure 10 A schematic diagram illustrating the working process of an air conditioner during transportation when refrigerant leakage occurs, according to an embodiment of this disclosure.

[0061] In the above diagrams: Air conditioner; Indoor unit 1; Indoor heat exchanger 11; First refrigerant pipe 12; Outdoor unit 2; Compressor 22; Outdoor fan 23; Second refrigerant pipe 24; Electronic control board 25; Photoionization detector 3; First photoionization detector 31; Second photoionization detector 32; Third refrigerant pipe 4; Fire extinguisher 5; First fire extinguisher 51; Second fire extinguisher 52; Delivery pipe 53; Fire extinguishing solenoid valve 54; First fire extinguishing solenoid valve 541; Second fire extinguishing solenoid valve 542; Control board 55; Check valve 6; First solenoid valve 71; Second solenoid valve 72; Third solenoid valve 73; First reversing valve 811; Second reversing valve 82. Detailed Implementation

[0062] To make the objectives, technical solutions, and advantages of this application clearer, the application is described and illustrated below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application. All other embodiments obtained by those skilled in the art based on the embodiments provided in this application without inventive effort are within the scope of protection of this application.

[0063] Obviously, the accompanying drawings described below are merely some examples or embodiments of this application. Those skilled in the art can apply this application to other similar scenarios based on these drawings without any inventive effort. Furthermore, it is understood that although the efforts made in this development process may be complex and lengthy, for those skilled in the art related to the content disclosed in this application, any changes to design, manufacturing, or production based on the technical content disclosed in this application are merely conventional technical means and should not be construed as insufficient disclosure of the content of this application.

[0064] In this application, the reference to "embodiment" means that a specific feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment that is mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described in this application may be combined with other embodiments without conflict.

[0065] The terms "connection," "linked," and "coupled" used in this application are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. "Multiple" in this application refers to two or more. "And / or" describes the relationship between related objects, indicating that three relationships can exist. For example, "A and / or B" can represent: A alone, A and B simultaneously, and B alone. The character " / " generally indicates that the preceding and following related objects are in an "or" relationship. The terms "first," "second," and "third" used in this application are merely to distinguish similar objects and do not represent a specific ordering of objects.

[0066] This utility model provides an air conditioner, as described below. Figures 1-10 The air conditioner provided in this application is described.

[0067] In one illustrative embodiment of the air conditioner provided by this utility model, refer to Figure 1 An air conditioner may include an indoor unit 1. The indoor unit 1 is typically installed indoors and is used for heat exchange with the indoor environment. The indoor unit 1 can be wall-mounted, floor-standing, ducted, curtain-mounted, etc.

[0068] Indoor unit 1 may include an indoor unit housing. The indoor unit housing forms the appearance of indoor unit 1.

[0069] The indoor unit casing has an internal mounting cavity. The mounting cavity is used to house and fix various components in the indoor unit 1, which can prevent external objects from colliding with the various components inside the indoor unit casing, thereby improving the reliability of the indoor unit 1 during transportation or installation.

[0070] The indoor unit housing may include an air inlet. The air inlet communicates with the mounting cavity and serves as the entrance for external air to flow into the indoor unit housing, allowing indoor air to enter the mounting cavity through the air inlet.

[0071] The indoor unit casing may include an air outlet. The air outlet is connected to the mounting cavity and serves as the outlet for the heat exchange airflow inside the indoor unit casing, allowing the airflow inside the mounting cavity to flow out through the air outlet.

[0072] The indoor unit 1 may include an indoor heat exchanger 11. The indoor heat exchanger 11 is located inside the indoor unit casing and is used to exchange heat with the airflow inside the indoor unit casing.

[0073] Continue to refer to Figure 1 An air conditioner may include an outdoor unit 2. The outdoor unit 2 is typically located outdoors and is used to transfer heat from the indoor unit to the outside. The indoor unit 1 and outdoor unit 2 can be configured as an integrated unit or a split-type unit.

[0074] Outdoor unit 2 may include an outdoor unit housing. The outdoor unit housing forms the appearance of outdoor unit 2. The interior of the outdoor unit housing is hollow to form an accommodating space. The accommodating space is configured to accommodate multiple components of outdoor unit 2, such as compressor 22, outdoor fan, outdoor electrical box, etc.

[0075] The outdoor unit housing may include an outdoor air inlet. The outdoor air inlet may be connected to the housing space, serving as the entrance for external air to flow into the housing space.

[0076] The outdoor unit casing may include an outdoor air outlet. The outdoor air outlet may communicate with the housing space and serve as an outlet for airflow from the indoor casing, allowing airflow from the housing space to exit through the outdoor air outlet.

[0077] Outdoor unit 2 may include an outdoor heat exchanger, which may be located within the housing space and is used to exchange heat with the outside air.

[0078] The outdoor fan 23 can be installed inside the housing. The rotation of the outdoor fan 23 causes outdoor air to enter the housing through the outdoor air inlet and exchange heat with the outdoor heat exchanger. The outdoor air after heat exchange flows out of the housing through the outdoor air outlet.

[0079] In some embodiments of this application, the air conditioner may include a fan located in both the indoor unit 1 and the outdoor unit 2. The fan located in the indoor unit 1 is defined as the indoor fan, and the fan located in the outdoor unit 2 is defined as the outdoor fan 23. (See reference...) Figure 1 The outdoor fan 23 is installed in the outdoor unit casing and is used to drive the air in the indoor unit casing to flow along the outdoor air inlet toward the outdoor air outlet so as to send the heat-exchanged air to the outside of the outdoor unit casing.

[0080] The outdoor unit 2 may include a compressor 22. The compressor 22 is housed within a housing. The compressor 22 is used to compress refrigerant gas in a low-temperature, low-pressure state into a high-temperature, high-pressure state, and discharge the compressed refrigerant gas to the condenser. The condenser condenses the compressed refrigerant into a liquid phase, and heat is released to the surrounding environment through the condensation process.

[0081] An air conditioner may include a refrigerant circulation loop. Through this loop, the refrigerant circulates sequentially through the compressor 22, condenser, and evaporator, enabling it to perform indoor cooling or heating. The condenser is an outdoor heat exchanger, and the evaporator is an indoor heat exchanger 11.

[0082] It is understandable that connecting pipes are used to connect indoor unit 1 and outdoor unit 2 to form a refrigerant circulation loop for refrigerant circulation.

[0083] The air conditioner may include a throttling device for throttling, which is provided in the indoor unit 1 or the outdoor unit 2. The throttling device is connected in the refrigerant circulation loop and located between the indoor heat exchanger 11 and the outdoor heat exchanger. The throttling device may be an expansion valve, which expands the high-temperature, high-pressure liquid refrigerant condensed in the condenser into a low-pressure liquid refrigerant.

[0084] The evaporator evaporates the refrigerant that expands in the expansion valve and returns the refrigerant gas, now at a low temperature and low pressure, to the compressor 22. The evaporator achieves a cooling effect by utilizing the latent heat of refrigerant evaporation to exchange heat with the material being cooled. Throughout the cycle, the air conditioner can regulate the temperature for the target user.

[0085] The outdoor unit 2 may include an electronic control board 25. The electronic control board 25 is disposed in the outdoor unit housing and is configured to be electrically connected to at least the compressor 22, the outdoor fan and the indoor unit 1, for controlling the compressor 22, the outdoor fan and the indoor unit 1, thereby controlling the operation of the entire air conditioner.

[0086] The air conditioner may include a fire extinguishing device, which is electrically connected to the control board 25. The fire extinguishing device is used to detect refrigerant leaks in real time and to take fire prevention measures when a refrigerant leak poses a fire risk, effectively preventing and stopping fires caused by refrigerant leaks and reducing the harm to people's health and property caused by fires.

[0087] The fire extinguishing device may include a photoionization detector 3, which is used to detect oil in the refrigerant leaking in the refrigerant circulation loop in real time.

[0088] It should be noted that a photoionization detector (PID) is a sensor used to detect and measure volatile organic compounds (VOCs) and other ionizable gases. The photoionization detector detects their presence and concentration by using an ultraviolet light source to ionize gas molecules.

[0089] Photoionization detectors (PDDs) use ultraviolet lamps (usually xenon lamps) to emit ultraviolet light. The energy of ultraviolet light is high enough to ionize many organic compounds. When a gas sample passes through the detection chamber of a PDD, the ultraviolet light ionizes the gas molecules, generating charged ions and free electrons. These ions and free electrons form an electric current under the influence of an electric field. The magnitude of this current is proportional to the concentration of gas molecules; therefore, the PDD can detect the presence and concentration of a gas by measuring this current.

[0090] When refrigerant leaks, it usually contains oil (lubricating oil). Since lubricating oil is an organic compound, the photoionization detector 3 can detect the organic gases produced by oil evaporation, and thus detect the concentration of oil in the leaked refrigerant. The photoionization detector 3 can detect extremely low concentrations of the gas, typically in the range of ppb (parts per billion) to ppm (parts per million).

[0091] Therefore, in this embodiment, when a refrigerant leak occurs, the photoionization detector 3 (PID) will detect the oil mixed in the refrigerant (the core of the fire during the leak) leaking out immediately. Compared with the prior art, which uses pressure sensors or refrigerant detection sensors to detect refrigerant leaks, this method has the advantages of higher sensitivity, accuracy, rapid response capability, and applicability to multiple scenarios. It can quickly detect refrigerant leaks in the early stage, improve the reliability of the fire extinguishing device, and effectively solve the technical problems of the prior art in terms of early fire risk detection, fire extinguishing efficiency, false alarms and missed alarms, and multi-scenario adaptability.

[0092] The fire extinguishing device may include a fire extinguisher 5. The fire extinguisher 5 has a delivery pipe 53 for dispensing extinguishing agent. The fire extinguisher is connected to a refrigerant pipe in the refrigerant circulation loop via the delivery pipe 53.

[0093] The fire extinguishing device may include a fire extinguishing solenoid valve 54, which is located on the delivery pipe 53 and is used to open or close the flow path between the fire extinguisher and the refrigerant circulation loop.

[0094] Among them, the fire extinguishing solenoid valve 54 can be electrically connected to the electronic control board 25 so that the electronic control board 25 can quickly switch the on and off state of the fire extinguishing solenoid valve 54 according to the signal detected by the photoionization detector 3.

[0095] In this embodiment, the fire extinguishing solenoid valve 54 is a normally closed solenoid valve. The normally closed solenoid valve remains closed when not energized and only opens when energized, ensuring that the fire extinguishing solenoid valve 54 automatically closes during normal operation of the air conditioner to prevent leakage of fire extinguishing agent.

[0096] The air conditioner may include a solenoid valve assembly, which is located on the refrigerant pipe in the refrigerant circulation loop and is used to open or close the refrigerant flow path between the indoor unit 1 and the outdoor unit 2.

[0097] The solenoid valve assembly can be electrically connected to the electronic control board 25 so that the electronic control board 25 can quickly switch the on / off state of the solenoid valve assembly according to the signal detected by the photoionization detector 3.

[0098] In this embodiment, when the photoionization detector 3 does not detect refrigerant leakage during the operation of the air conditioner, the fire extinguishing solenoid valve 54 cuts off the flow path between the fire extinguisher and the refrigerant circulation loop, and the solenoid valve assembly opens the refrigerant flow path between the indoor unit 1 and the outdoor unit 2, so that the refrigerant circulates in the refrigeration circulation loop, the air conditioner works normally, and the fire extinguishing agent in the fire extinguisher enters the refrigerant circulation loop, which would affect the cooling and heating operation of the air conditioner.

[0099] When the photoionization detector 3 detects a refrigerant leak during the operation of the air conditioner, a refrigerant leak occurs in the refrigerant circulation loop. The fire extinguishing solenoid valve 54 connects the flow path between the delivery pipe 53 and the refrigerant circulation loop. The solenoid valve assembly blocks the refrigerant flow path between the indoor unit 1 and the outdoor unit 2. The extinguishing agent in the fire extinguisher enters the refrigerant circulation loop through the delivery pipe 53, squeezing the refrigerant out of the leak.

[0100] In this embodiment, a photoionization detector 3 (PID) is used, which can directly detect lubricating oil mixed in during refrigerant leakage. It can quickly detect the presence of fire-risk substances in the early stages of refrigerant leakage. When a refrigerant leak is detected, indicating a fire risk, the fire extinguishing solenoid valve 54 is immediately opened, and the fire extinguishing agent is sent through the delivery pipe 53 into the refrigerant pipe of the leaking refrigerant circulation loop. The fire extinguishing agent quickly flows towards the leak in the refrigerant circulation loop, diluting the refrigerant in the refrigerant pipe and quickly expelling the refrigerant from the leak in the refrigerant pipe to retard the flame, effectively preventing or extinguishing the fire and reducing the harm to personnel health and property caused by the fire.

[0101] Meanwhile, the solenoid valve assembly disconnects the refrigerant flow path between indoor unit 1 and outdoor unit 2, effectively isolating the refrigerant on the indoor side from the refrigerant on the outdoor side. This helps reduce the concentration of refrigerant and oil, increasing the concentration of the extinguishing agent and effectively improving flame retardancy and fire extinguishing efficiency. In this embodiment, the fire extinguisher can effectively eliminate the possibility of a fire caused by continuous refrigerant gas leakage, achieving rapid and timely fire prevention and extinguishing.

[0102] refer to Figure 1 In some embodiments, the photoionization detector 3 can be installed in the outdoor unit 2 to detect oil leaked in the refrigerant inside the outdoor unit 2 in real time.

[0103] The outdoor heat exchanger is connected to the compressor 22 via the second refrigerant pipe 24, and the fire extinguisher is connected to the second refrigerant pipe 24 via the delivery pipe 53. When a refrigerant leak occurs in the outdoor unit 2, the fire extinguishing solenoid valve 54 connects the delivery pipe 53 to the second refrigerant pipe 24. The solenoid valve assembly blocks the refrigerant flow path between the indoor unit 1 and the outdoor unit 2, allowing the extinguishing agent in the fire extinguisher to enter the second refrigerant pipe 24 through the delivery pipe 53, thus squeezing the refrigerant out of the leak.

[0104] In this embodiment, by installing a photoionization detector 3 in the outdoor unit 2, and working with a fire extinguisher, fire suppression support can be provided for leaks in the indoor unit 1, effectively improving fire suppression efficiency and reducing fire hazards.

[0105] refer to Figure 2 In some embodiments, the photoionization detector 3 may be installed in the indoor unit 1 to detect oil in the refrigerant leaking into the indoor unit 1 in real time.

[0106] The indoor heat exchanger 11 is connected to the outdoor heat exchanger via the third refrigerant pipe 4, which has an indoor unit interface. The indoor heat exchanger 11 is connected to the compressor 22 via the first refrigerant pipe 12, and the fire extinguisher is connected to the indoor unit interface via the delivery pipe 53. When a refrigerant leak occurs in the indoor unit 1, the fire extinguishing solenoid valve 54 connects the delivery pipe 53 to the third refrigerant pipe 4, and the solenoid valve assembly blocks the refrigerant flow path between the indoor unit 1 and the outdoor unit 2. The extinguishing agent in the fire extinguisher enters the third refrigerant pipe 4, the indoor heat exchanger 11, and the first refrigerant pipe 12 sequentially through the delivery pipe 53, squeezing the refrigerant out of the leak.

[0107] In this embodiment, by setting a photoionization detector 3 in the indoor unit 1, and working with a fire extinguisher, fire extinguishing support can be provided for leaks in the indoor unit 1, effectively improving fire extinguishing efficiency and reducing fire hazards.

[0108] In some embodiments, the solenoid valve assembly may include a first solenoid valve. The compressor 22 is connected to the outdoor heat exchanger and the delivery pipe 53 via the first solenoid valve, which is used to open or close the flow path between the compressor 22 and the outdoor heat exchanger and the delivery pipe 53.

[0109] For details, please refer to Figure 1 The first solenoid valve 71 is located on the second refrigerant pipe 24, and the first solenoid valve is located between the compressor 22 and the delivery pipe 53 connecting the second refrigerant pipe 24, so as to avoid interference between the flow path between the fire extinguisher and the second refrigerant pipe 24.

[0110] The solenoid valve assembly may include a second solenoid valve 72. The second solenoid valve 72 is connected to the refrigerant pipe (first refrigerant pipe 12) between the compressor 22 and the indoor heat exchanger 11, and is used to open or close the refrigerant flow path between the compressor 22 and the indoor heat exchanger 11.

[0111] The solenoid valve assembly may include a third solenoid valve 73. The third solenoid valve 73 is connected to the refrigerant pipe between the outdoor heat exchanger and the indoor heat exchanger 11, and is used to open or close the refrigerant flow path between the outdoor heat exchanger and the indoor heat exchanger 11. (Reference) Figure 2 The third solenoid valve 73 is located between the indoor unit interface and the outdoor heat exchanger.

[0112] When refrigerant leakage occurs in outdoor unit 2, the first solenoid valve isolates the compressor 22 from the outdoor heat exchanger, and the third solenoid valve isolates the indoor heat exchanger 11 from the outdoor heat exchanger, thereby cutting off the refrigerant flow path between indoor unit 1 and outdoor unit 2.

[0113] When refrigerant leakage occurs in indoor unit 1, the second solenoid valve isolates the compressor 22 from the outdoor heat exchanger, and the third solenoid valve isolates the indoor heat exchanger 11 from the outdoor heat exchanger, thereby cutting off the refrigerant flow path between indoor unit 1 and outdoor unit 2.

[0114] Among them, the first solenoid valve 71, the second solenoid valve 72 and the third solenoid valve 73 can be normally open solenoid valves.

[0115] The normally open solenoid valve remains open when power is off, only closing when a leak is detected, significantly reducing energy consumption. When a refrigerant leak is detected, the normally open solenoid valve quickly cuts off the refrigerant flow path, reducing the leakage and improving fire suppression efficiency.

[0116] refer to Figure 3 In some embodiments, the photoionization detector 3 may be located in the indoor unit 1 and the outdoor unit 2.

[0117] Among them, the photoionization detector 3 installed in the indoor unit 1 is defined as the first photoionization detector 31. The first photoionization detector 31 is electrically connected to the electronic control board 25 and is used to detect the oil in the refrigerant leaking from the first refrigerant pipe 12 in real time and transmit the detected data information to the electronic control board 25.

[0118] The photoionization detector 3 installed in the outdoor unit 2 is defined as the second photoionization detector 32. The first photoionization detector 31 is electrically connected to the electronic control board 25 and is used to detect the oil in the refrigerant leaking from the second refrigerant pipe 24 in real time and transmit the detected data information to the electronic control board 25.

[0119] In this embodiment, by setting the first photoionization detector 31 and the second photoionization detector 32 respectively, the refrigerant leakage of the indoor unit 1 and the outdoor unit 2 can be monitored simultaneously, ensuring that the leakage can be detected in time no matter where it occurs, thereby improving the safety and reliability of the system.

[0120] Continue to refer to Figure 3 There are two fire extinguishers, corresponding to the first photoionization detector 31 and the second photoionization detector 32, namely the first fire extinguisher 51 and the second fire extinguisher 52. The delivery pipe 53 of the first fire extinguisher 51 is connected to the indoor unit interface B, and the delivery pipe 53 of the second fire extinguisher 52 is connected to the second refrigerant pipe 24. Connection point A is the connection point between the delivery pipe 53 of the second fire extinguisher 52 and the second refrigerant pipe 24.

[0121] When a refrigerant leak is detected in outdoor unit 2, the second fire extinguisher 52 is connected to the second refrigerant pipe 24, the first solenoid valve 71 isolates the compressor 22 from the second refrigerant pipe 24 and the second fire extinguisher 52, and the third solenoid valve 73 isolates the indoor unit interface B from the heat exchanger of outdoor unit 2, so as to isolate the refrigerant flow path between indoor unit 1 and outdoor unit 2.

[0122] In this embodiment, when refrigerant leakage is detected in the outdoor unit 2, the cooperation of the first solenoid valve 71 and the third solenoid valve 73 can cut off the refrigerant from the compressor 22 from entering the second refrigerant pipe 24, and also cut off the refrigerant in the first refrigerant pipe 12 from entering the second refrigerant pipe 24 through the indoor unit interface B, effectively reducing the concentration of refrigerant and oil. While the fire extinguishing agent flows from the second refrigerant pipe 24 towards the leak in the indoor refrigerant pipe, it can dilute the refrigerant in the indoor refrigerant pipe and quickly expel the refrigerant from the leak in the second refrigerant pipe 24, increasing the concentration of the fire extinguishing agent. This effectively improves flame retardancy and fire extinguishing efficiency, eliminating the possibility of a fire caused by continuous refrigerant leakage.

[0123] When a refrigerant leak is detected in outdoor unit 2, the first fire extinguisher 51 is connected to the third refrigerant pipe 4, the second solenoid valve 72 isolates the compressor 22 from the first refrigerant pipe 12, and the third solenoid valve 73 isolates the indoor unit interface B from the outdoor heat exchanger, so as to isolate the refrigerant flow path between indoor unit 1 and outdoor unit 2.

[0124] In this embodiment, when refrigerant leakage is detected in the indoor unit 1, the cooperation of the second solenoid valve 72 and the third solenoid valve 73 can cut off the refrigerant from the compressor 22 from entering the first refrigerant pipe 12, and also cut off the refrigerant in the indoor refrigerant pipe from entering the first refrigerant pipe 12 through the indoor unit interface B, effectively reducing the concentration of refrigerant and oil. While the fire extinguishing agent flows from the first refrigerant pipe 12 to the leak in the outdoor refrigerant pipe, it can dilute the refrigerant in the outdoor refrigerant pipe and quickly expel it from the leak, increasing the concentration of the fire extinguishing agent. This effectively improves flame retardancy and fire extinguishing efficiency, eliminating the possibility of a fire caused by continuous refrigerant leakage.

[0125] In this embodiment, two fire extinguishers are installed to address refrigerant leaks on the indoor and outdoor refrigerant pipelines, respectively, allowing each extinguisher to be activated based on the location of the leak. This targeted approach enables rapid delivery of extinguishing agent to the leak point, reducing agent waste and improving fire suppression efficiency.

[0126] It should be noted that the indoor refrigerant pipeline is the first pipeline between the compressor 22 and the indoor unit interface, and the first pipeline includes the indoor heat exchanger 11 and the first refrigerant pipe 12. The outdoor refrigerant pipeline is the second pipeline between the compressor 22 and the indoor unit interface, and the second pipeline includes the outdoor heat exchanger and the second refrigerant pipe 24.

[0127] In some embodiments of this application, the fire extinguishing device further includes a one-way valve 6, which is disposed on the delivery pipe 53. (See reference...) Figure 4 Both the first fire extinguisher 51 and the second fire extinguisher 52 are equipped with one-way valves 6 on their delivery pipes 53.

[0128] By setting a one-way valve 6, the backflow of extinguishing agent can be prevented, ensuring that the extinguishing agent can smoothly enter the second refrigerant pipe 24 or the first refrigerant pipe 12 through the delivery pipe 53, thereby achieving effective flame retardancy.

[0129] Of course, in some other embodiments, a single fire extinguisher can be provided, and the delivery pipe 53 of the fire extinguisher can be divided into two branches, which are respectively connected to the indoor unit interface B and the second refrigerant pipe 24.

[0130] The fire extinguishing solenoid valve 54 on the delivery pipe 53 of the first fire extinguisher 51 is defined as the first fire extinguishing solenoid valve 541, and the fire extinguishing solenoid valve 54 on the delivery pipe 53 of the second fire extinguisher 52 is defined as the second fire extinguishing solenoid valve 542.

[0131] refer to Figure 5 When the refrigerant leak occurs in the outdoor refrigerant pipeline, the current in the second photoionization detector 32 will increase sharply, indicating that it has detected a leak of refrigerant and its mixed oil (the core of the fire during the leak). The detector signal is transmitted to the control board 25, which, upon receiving the signal, issues a control command to open the second fire extinguishing solenoid valve 542 and close the first solenoid valve 71 and the third solenoid valve 73. At this point, the outdoor refrigerant is isolated from the indoor refrigerant, and the refrigerant in the compressor 22 is also isolated from the second refrigerant pipe 24. Under the action of the second fire extinguisher 52, the fire can be effectively extinguished.

[0132] refer to Figure 6 When the refrigerant leak occurs in the indoor piping, the current in the first photoionization detector 31 will increase sharply, indicating that the leak is detected, along with the oil mixed in with the refrigerant (the core of the fire during the leak). The detector signal is transmitted to the control board 25, which, upon receiving the signal, issues a control command to open the first fire extinguishing solenoid valve 541 and close the second and third solenoid valves 72 and 73. At this point, the outdoor refrigerant is isolated from the indoor refrigerant, and the first fire extinguisher 51 effectively extinguishes the flame.

[0133] In some embodiments of this application, the fire extinguishing device may include an alarm device. The alarm device is electrically connected to the control board 25 and is used to issue an alarm in the event of a refrigerant leak.

[0134] In this embodiment, by setting up an alarm device, the fire extinguishing device can immediately issue an alarm when a refrigerant leak is detected, reminding users or maintenance personnel to take timely measures to resolve the leak problem.

[0135] In some embodiments, the first photoionization detector 31 and the second photoionization detector 32 may be equipped with an alarm device for issuing an alarm when a refrigerant leak is detected.

[0136] It is understood that in the above embodiments, both the first fire extinguisher 51 and the second fire extinguisher 52 are always in the activated state. Through the control of the corresponding fire extinguishing solenoid valve, the fire extinguishers in the delivery pipes 53 of the first fire extinguisher 51 and the second fire extinguisher 52 can be quickly pushed into the corresponding refrigerant pipes.

[0137] Of course, in some other embodiments, references Figure 7 The fire extinguishing device may include a control panel 55. The control panel 55 is electrically connected to the electrical control panel 25 and to the fire extinguisher, and is used to control the activation of the fire extinguisher in the event of a refrigerant leak.

[0138] In this embodiment, by adding an independent control board 55 specifically for controlling the activation of the fire extinguisher in the event of a refrigerant leak, the redundancy and reliability of the fire extinguishing device are improved. This effectively avoids the risk of accidental release of extinguishing agent that may result from the fire extinguisher being constantly in the activated state.

[0139] In some embodiments, the delivery pipe 53 of the fire extinguisher 5 is detachably connected to the refrigerant pipe of the refrigerant circulation loop via a reversing valve.

[0140] refer to Figure 8 The delivery pipe 53 of the first fire extinguisher 51 is detachably connected to the refrigerant circulation circuit via the first reversing valve 81, and the delivery pipe 53 of the second fire extinguisher 52 is detachably connected to the refrigerant circulation circuit via the second reversing valve 82.

[0141] In this embodiment, the detachable connection between the first reversing valve 81 and the second reversing valve 82 allows the fire extinguisher to be quickly disassembled and replaced, reducing the difficulty of maintenance and upgrading, and providing the advantage of recycling and reuse.

[0142] It is understandable that the fire extinguishing device of this application can be an optional device for air conditioning users. Firstly, if users choose to install the fire extinguishing device, it will ensure the safety of leakage during transportation and subsequent home use. Secondly, if users do not choose to install the fire extinguishing device, the manufacturer can install the external fire extinguishing device to ensure the safety of leakage during transportation. After complete installation in the user's home, it can be disassembled from the first reversing valve 81 and the second reversing valve 82 for recycling.

[0143] Another aspect of this application provides an air conditioner, see reference. Figure 9 The air conditioner includes outdoor unit 2.

[0144] The outdoor unit 2 may include a compressor 22 and an outdoor heat exchanger 4. The compressor 22 is connected to the outdoor heat exchanger via a second refrigerant pipe 24, and the other end of the outdoor heat exchanger is used to connect to the indoor unit interface B.

[0145] The air conditioner may include a fire extinguishing device, which is detachably connected to the outdoor unit 2.

[0146] refer to Figure 9 The fire extinguishing device may include a photoionization detector 3, which is installed in the outdoor unit 2 and is used to detect the oil in the refrigerant leaking in the outdoor unit 2 in real time.

[0147] The fire extinguishing device includes a fire extinguisher 2. The fire extinguisher 2 has a delivery pipe 53, which is detachably connected to a second refrigerant pipe 24, and a fire extinguishing solenoid valve 54 is installed on the delivery pipe 53.

[0148] A first solenoid valve 71 is provided on the second refrigerant pipe 24 between the delivery pipe 53 and the compressor 22. The first solenoid valve 71 is used to open or close the refrigerant flow path between the second refrigerant pipe and the compressor.

[0149] During the transportation of the air conditioner, when the photoionization detector 3 detects a refrigerant leak, the fire extinguishing solenoid valve 54 connects the delivery pipe 53 to the second refrigerant pipe 24, and the first solenoid valve 71 disconnects the second refrigerant pipe 24 from the compressor 22. The extinguishing agent in the fire extinguisher 5 enters the second refrigerant pipe 24 through the delivery pipe 53, squeezing the refrigerant out of the leak.

[0150] Specifically, during the transportation of the air conditioner, the outdoor unit 2 is separated from the indoor unit 1, and the refrigerant is completely stored in the refrigerant pipeline in the outdoor unit. Therefore, a leakage accident can only occur in the outdoor unit 2.

[0151] refer to Figure 10 During transportation, when refrigerant leaks, the current of the photoionization detector 3 increases sharply, indicating that the refrigerant and its mixed oil (the core of the fire caused by the leak) are detected. This opens the fire extinguishing solenoid valve 54, connecting the delivery pipe 53 to the second refrigerant pipe 24, and closes the first solenoid valve 71, isolating the first refrigerant pipe 24 from the compressor 22. As the extinguishing agent flows from the second refrigerant pipe 24 to the leak in the outdoor refrigerant pipe, it dilutes the refrigerant in the outdoor refrigerant pipe and quickly expels it from the leak, increasing the concentration of the extinguishing agent. This effectively improves flame retardancy and fire extinguishing efficiency, eliminating the possibility of a fire caused by continuous refrigerant leakage.

[0152] In this embodiment, a photoionization detector (PID) is installed in the outdoor unit 2 to monitor the oil in the leaking refrigerant in real time. This allows for real-time detection of refrigerant leaks caused by bumps, collisions, or other factors during the transportation of the outdoor unit 2. Once a leak is detected, the fire extinguishing device responds quickly, expelling the refrigerant from the leak point with the extinguishing agent, effectively preventing a fire. Furthermore, the fire extinguishing device is detachably connected to the outdoor unit 2 and can be used as an optional accessory for users, facilitating its selection or recycling.

[0153] During the operation or transportation of air conditioners, rapid response is crucial to prevent the spread of fire, and the rapid detection capability of PID can effectively shorten the time window for fire to occur.

[0154] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended 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 therein. 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.

[0155] For ease of explanation, the above description has been provided in conjunction with specific embodiments. However, the above exemplary discussion is not intended to be exhaustive or to limit the embodiments to the specific forms disclosed above. Various modifications and variations can be obtained based on the above teachings. The selection and description of the above embodiments are for the purpose of better explaining the principles and practical applications, thereby enabling those skilled in the art to better utilize the described embodiments and various different variations of embodiments suitable for specific use considerations.

Claims

1. An air conditioner, characterized in that, include: Indoor unit, including indoor heat exchanger; Outdoor unit, including compressor and outdoor heat exchanger; The refrigerant circulation loop allows the refrigerant to circulate sequentially through the circuit consisting of the compressor, condenser, and evaporator. Of the condenser and the evaporator, one is the outdoor heat exchanger and the other is the indoor heat exchanger; Fire extinguishing device, the fire extinguishing device comprising: A photoionization detector is used to detect oil in the leaked refrigerant in the refrigerant circulation loop in real time. The fire extinguisher is connected to the refrigerant pipe of the refrigerant circulation loop via a delivery pipe. The delivery pipe is equipped with a fire extinguishing solenoid valve, which is used to open or close the flow path between the fire extinguisher and the refrigerant circulation loop. The solenoid valve assembly is located on the refrigerant pipe of the refrigerant circulation loop and is used to open or close the refrigerant flow path between the indoor unit and the outdoor unit. When a refrigerant leak occurs in the refrigerant circulation loop, the fire extinguishing solenoid valve connects the delivery pipe to the refrigerant circulation loop. The solenoid valve assembly blocks the refrigerant flow path between the indoor unit and the outdoor unit. The extinguishing agent in the fire extinguisher enters the refrigerant circulation loop through the delivery pipe, squeezing the refrigerant out of the leak.

2. The air conditioner according to claim 1, characterized in that, The fire extinguishing device also includes a one-way valve, which is located on the delivery pipe.

3. The air conditioner according to claim 1, characterized in that, The photoionization detector is installed in the outdoor unit and is used to detect oil leaked in the refrigerant inside the outdoor unit in real time. The outdoor heat exchanger is connected to the compressor via a second refrigerant pipe, and the fire extinguisher is connected to the second refrigerant pipe via a delivery pipe; When a refrigerant leak occurs in the outdoor unit, the fire extinguishing solenoid valve connects the delivery pipe to the second refrigerant pipe, and the solenoid valve assembly cuts off the refrigerant flow path between the indoor unit and the outdoor unit, so that the extinguishing agent in the fire extinguisher enters the second refrigerant pipe through the delivery pipe and squeezes the refrigerant out of the leak.

4. The air conditioner according to claim 1 or 3, characterized in that, The photoionization detector is installed in the indoor unit and is used to detect oil in the refrigerant leaking into the indoor unit in real time. The indoor heat exchanger is connected to the outdoor heat exchanger via a third refrigerant pipe, the third refrigerant pipe having an indoor unit interface; the indoor heat exchanger is connected to the compressor via a first refrigerant pipe; and the fire extinguisher is connected to the indoor unit interface via a delivery pipe. When a refrigerant leak occurs in the indoor unit, the fire extinguishing solenoid valve connects the delivery pipe to the third refrigerant pipe, and the solenoid valve assembly cuts off the refrigerant flow path between the indoor unit and the outdoor unit; the extinguishing agent in the fire extinguisher enters the third refrigerant pipe, the indoor heat exchanger and the first refrigerant pipe in sequence through the delivery pipe, squeezing the refrigerant out of the leak.

5. The air conditioner according to claim 1, characterized in that, The solenoid valve assembly includes: The first solenoid valve is used to connect the compressor to the outdoor heat exchanger and the delivery pipe. The second solenoid valve is located on the refrigerant pipe between the compressor and the indoor heat exchanger; The third solenoid valve is located on the refrigerant pipe between the outdoor heat exchanger and the indoor heat exchanger; When a refrigerant leak occurs in the outdoor unit, the first solenoid valve isolates the compressor from the outdoor heat exchanger, and the third solenoid valve isolates the indoor heat exchanger from the outdoor heat exchanger, thereby cutting off the refrigerant flow path between the indoor unit and the outdoor unit. When a refrigerant leak occurs in the indoor unit, the second solenoid valve isolates the compressor from the outdoor heat exchanger, and the third solenoid valve isolates the indoor heat exchanger from the outdoor heat exchanger, thereby cutting off the refrigerant flow path between the indoor unit and the outdoor unit.

6. The air conditioner according to claim 5, characterized in that, The first solenoid valve, the second solenoid valve, and the third solenoid valve are normally open solenoid valves.

7. The air conditioner according to claim 1, characterized in that, The fire extinguisher's delivery pipe is detachably connected to the refrigerant pipe of the refrigerant circulation loop via a reversing valve.

8. The air conditioner according to claim 1, characterized in that, The outdoor unit also includes an electrical control board, which is electrically connected to the solenoid valve assembly and the fire extinguishing solenoid valve.

9. The air conditioner according to claim 8, characterized in that, The fire extinguishing device also includes a control board electrically connected to the electrical control board, the control board being electrically connected to the fire extinguisher and used to activate the fire extinguisher.

10. An air conditioner, characterized in that, include: The outdoor unit includes: compressor; The outdoor heat exchanger is connected to the compressor at one end via a second refrigerant pipe, and to the indoor unit interface at the other end. A fire extinguishing device, detachably connected to the outdoor unit, comprising: A photoionization detector is installed in the outdoor unit to detect oil in the leaked refrigerant in the outdoor unit in real time. A fire extinguisher has a delivery pipe, which is detachably connected to a second refrigerant pipe, and a fire extinguishing solenoid valve is installed on the delivery pipe; A first solenoid valve is provided on the second refrigerant pipe between the delivery pipe and the compressor, and is used to open or close the refrigerant flow path between the second refrigerant pipe and the compressor; During the transportation of the air conditioner, when the photoionization detector detects a refrigerant leak, the fire extinguishing solenoid valve connects the delivery pipe to the second refrigerant pipe. The first solenoid valve cuts off the refrigerant flow path between the second refrigerant pipe and the compressor. The extinguishing agent in the fire extinguisher enters the second refrigerant pipe through the delivery pipe, squeezing the refrigerant out of the leak.

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