Refrigerant pipe connection kit, auditory guide jig, and refrigerant pipe connection method

Abstract

A refrigerant pipe connection kit for connecting a refrigerant pipe to an object may according to an embodiment of the present invention comprise: a refrigerant pipe-sealing connector comprising a fastening nut provided to be fastened to a target object, a grip ring disposed in the fastening nut and preventing separation of the refrigerant pipe, and an elastic member, disposed in the fastening nut, which elastically deforms when the fastening nut is rotated; and an auditory guide jig provided so as to audibly recognize whether the fastening of the fastening nut is completed by the fastening nut being rotated by a predetermined number of rotations.

Description

Refrigerant pipe connection kit, auditory guide jig, and refrigerant pipe connection method

[0001] This invention relates to a refrigerant pipe connection kit, an auditory guide jig used therein, and a method for connecting refrigerant pipes.

[0002] Generally, an air conditioner is a device including a refrigeration cycle and may include an indoor unit placed in an indoor space and an outdoor unit placed in an outdoor space.

[0003] The indoor unit is installed indoors to draw in indoor air, exchange heat with the refrigerant, and discharge the heat-exchanged air back into the room, while the outdoor unit exchanges heat with the outside air for the refrigerant drawn in from the indoor unit, making it ready to exchange heat with the indoor air again before supplying it to the indoor unit. Multiple refrigerant pipes are arranged between the indoor and outdoor units to transport the refrigerant.

[0004] If the refrigerant pipes to the indoor and outdoor units are not properly connected, refrigerant leakage may occur. Accordingly, development is underway for refrigerant pipe connection structures to ensure a hermetic connection of the pipes between the indoor and outdoor units.

[0005] A refrigerant pipe connection kit according to one embodiment is a refrigerant pipe connection kit for connecting a refrigerant pipe to a target body, and may include a refrigerant pipe sealing connector comprising a fastening nut configured to be fastened to the target body, a grip ring disposed inside the fastening nut to prevent the refrigerant pipe from detaching, and an elastic member disposed inside the fastening nut that elastically deforms when the fastening nut rotates.

[0006] A refrigerant pipe connection kit according to one embodiment may further include an auditory guide jig configured to allow auditory recognition of whether the fastening nut has been rotated by a predetermined number of rotations and whether the fastening of the fastening nut has been completed.

[0007] An auditory guide jig according to one embodiment is configured to check whether the fastening of a refrigerant pipe sealing connector is completed, and the fastening nut of the refrigerant pipe sealing connector may be rotated by a predetermined number of rotations so that the fastening of the fastening nut can be audibly recognized.

[0008] A method for connecting a refrigerant pipe according to one embodiment may include: installing an auditory guide jig on an object; temporarily fixing a fastening nut of a refrigerant pipe sealing connector into which a refrigerant pipe is inserted to the object; and rotating the fastening nut to reach a predetermined number of rotations based on an auditory signal generated by the auditory guide jig.

[0009] FIG. 1 is a drawing showing an air conditioner according to one embodiment of the present disclosure.

[0010] Figure 2 is an enlarged view of the part where the outdoor unit and the refrigerant pipe are connected in the air conditioner of Figure 1.

[0011] FIGS. 3a and 3b are drawings for illustrating a refrigerant pipe sealing connector of a refrigerant pipe connection kit according to one embodiment.

[0012] FIG. 4 is an assembled perspective view illustrating a refrigerant pipe connection kit according to one embodiment.

[0013] FIG. 5 is an exploded perspective view illustrating a refrigerant pipe connection kit according to one embodiment.

[0014] FIG. 6 is a perspective view showing the rotating friction member and the fixed friction member of the auditory guide jig at different angles.

[0015] FIG. 7 is a perspective view illustrating the installation of an auditory guide jig according to one embodiment.

[0016] FIG. 8 is a perspective view illustrating the operation of an auditory guide jig according to one embodiment.

[0017] Figure 9 is a cross-sectional view of the auditory guide jig of Figure 8 cut along the line IX-IX.

[0018] FIG. 10 is a perspective view showing the state when the fastening nut is completed in a refrigerant pipe connection kit according to one embodiment.

[0019] FIG. 11 is an assembled perspective view illustrating a refrigerant pipe connection kit according to one embodiment.

[0020] FIG. 12 is an exploded perspective view illustrating a refrigerant pipe connection kit according to one embodiment.

[0021] FIG. 13 is a perspective view illustrating an auditory guide jig according to one embodiment.

[0022] FIG. 14 is a perspective view illustrating the operation of an auditory guide jig according to one embodiment.

[0023] Fig. 15 is a cross-sectional view of the auditory guide jig of Fig. 14.

[0024] FIG. 16 is a perspective view showing the state when the fastening nut is completed in a refrigerant pipe connection kit according to one embodiment.

[0025] The various embodiments of this document and the terms used therein are not intended to limit the technical features described in this document to specific embodiments, and should be understood to include various modifications, equivalents, or substitutions of said embodiments.

[0026] In relation to the description of the drawings, similar reference numerals may be used for similar or related components.

[0027] The singular form of the noun corresponding to an item may include one or plural items, unless the relevant context clearly indicates otherwise.

[0028] In this document, each of the phrases such as "A or B", "at least one of A and B", "at least one of A or B", "A, B or C", "at least one of A, B and C", and "at least one of A, B, or C" may include any one of the items listed together in the corresponding phrase, or all possible combinations thereof.

[0029] Terms such as "first," "second," or "first" or "second" may be used simply to distinguish a component from another component and do not limit the components in other aspects (e.g., importance or order).

[0030] Where any (e.g., 1st) component is referred to as "coupled" or "connected" to another (e.g., 2nd) component, with or without the terms "functionally" or "communicationly," it means that the component may be connected to the other component directly (e.g., via a wire), wirelessly, or through a third component.

[0031] Terms such as “include” or “have” are intended to specify the existence of the features, numbers, steps, actions, components, parts, or combinations thereof described in this document, and do not preclude the existence or addition of one or more other features, numbers, steps, actions, components, parts, or combinations thereof.

[0032] When it is said that one component is “connected,” “combined,” “supported,” or “in contact” with another component, this includes not only cases where the components are directly connected, combined, supported, or in contact, but also cases where they are indirectly connected, combined, supported, or in contact through a third component.

[0033] When it is said that a component is located “on” another component, this includes not only cases where one component is in contact with the other, but also cases where another component exists between the two components.

[0034] The term “and / or” includes a combination of multiple related described components or any of the multiple related described components.

[0035] The operating principle and embodiments of the present invention will be described below with reference to the attached drawings.

[0036] An air conditioner according to various embodiments is a device that performs functions such as air purification, ventilation, humidity control, cooling, or heating in an air-conditioned space (hereinafter referred to as "indoor"), and means a device having at least one of these functions.

[0037] According to one embodiment, an air conditioner may include a heat pump device to perform a cooling or heating function. The heat pump device may include a refrigeration cycle in which a refrigerant circulates along a compressor, a first heat exchanger, an expansion device, and a second heat exchanger. All components of the heat pump device may be housed in a single housing that forms the exterior of the air conditioner, such as a window air conditioner or a portable air conditioner. Alternatively, some components of the heat pump device may be housed separately in multiple housings that form a single air conditioner, such as a wall-mounted air conditioner, a stand-type air conditioner, or a system air conditioner.

[0038] An air conditioner comprising a plurality of housings may include at least one outdoor unit installed outdoors and at least one indoor unit installed indoors. For example, the air conditioner may be configured such that one outdoor unit and one indoor unit are connected via refrigerant pipes. For example, the air conditioner may be configured such that one outdoor unit is connected via refrigerant pipes to two or more indoor units. For example, the air conditioner may be configured such that two or more outdoor units and two or more indoor units are connected via a plurality of refrigerant pipes.

[0039] The outdoor unit can be electrically connected to the indoor unit. For example, information (or commands) for controlling the air conditioner can be entered through an input interface provided on the outdoor unit or the indoor unit, and the outdoor unit and the indoor unit can operate simultaneously or sequentially in response to user input.

[0040] The air conditioner may include an outdoor heat exchanger provided in the outdoor unit, an indoor heat exchanger provided in the indoor unit, and a refrigerant pipe connecting the outdoor heat exchanger and the indoor heat exchanger.

[0041] An outdoor heat exchanger can perform heat exchange between the refrigerant and the outdoor air by utilizing the phase change of the refrigerant (e.g., evaporation or condensation). For example, while the refrigerant condenses in the outdoor heat exchanger, the refrigerant releases heat to the outdoor air, and while the refrigerant flowing through the outdoor heat exchanger evaporates, the refrigerant can absorb heat from the outdoor air.

[0042] Indoor units are installed indoors. For example, indoor units can be classified into ceiling-mounted, stand-type, and wall-mounted units depending on how they are placed. For example, ceiling-mounted indoor units can be classified into 4-way, 1-way, and duct-type units depending on the method of air discharge.

[0043] Similarly, an indoor heat exchanger can perform heat exchange between the refrigerant and the indoor air by utilizing the phase change of the refrigerant (e.g., evaporation or condensation). For example, while the refrigerant evaporates in the indoor unit, it can absorb heat from the indoor air, and the room can be cooled by blowing the cooled indoor air as it passes through the cooled indoor heat exchanger. Additionally, while the refrigerant condenses in the indoor heat exchanger, it can release heat to the indoor air, and the room can be heated by blowing the heated indoor air as it passes through the high-temperature indoor heat exchanger.

[0044] In other words, an air conditioner performs cooling or heating functions through the phase change process of a refrigerant circulating between an outdoor heat exchanger and an indoor heat exchanger; to facilitate this refrigerant circulation, the air conditioner may include a compressor that compresses the refrigerant. The compressor can draw in refrigerant gas through a suction port and compress the refrigerant gas. The compressor can discharge high-temperature, high-pressure refrigerant gas through a discharge port. The compressor may be placed inside the outdoor unit.

[0045] The refrigerant may circulate through the refrigerant pipe in the order of the compressor, outdoor heat exchanger, expansion device, and indoor heat exchanger, or in the order of the compressor, indoor heat exchanger, expansion device, and outdoor heat exchanger.

[0046] For example, if an air conditioner has one outdoor unit and one indoor unit directly connected through a refrigerant pipe, the refrigerant can be arranged to circulate between the outdoor unit and the indoor unit through the refrigerant pipe.

[0047] For example, in an air conditioner, if one outdoor unit is connected to two or more indoor units via refrigerant pipes, the refrigerant may flow to multiple indoor units through refrigerant pipes branching from the outdoor unit. The refrigerant discharged from multiple indoor units may be combined and circulated back to the outdoor unit. For example, multiple indoor units may each be directly connected in parallel to a single outdoor unit via separate refrigerant pipes.

[0048] Multiple indoor units can each operate independently according to an operating mode set by the user. That is, some of the multiple indoor units can operate in cooling mode while others operate in heating mode simultaneously. In this case, the refrigerant may be arranged to flow into each indoor unit in a selectively high-pressure or low-pressure state along a designated circulation path via a flow path switching valve to be described later, and to be discharged and circulated to the outdoor unit.

[0049] For example, when two or more outdoor units and two or more indoor units are connected through multiple refrigerant pipes, the refrigerant discharged from multiple outdoor units may be combined and flow through a single refrigerant pipe, and then branch out again at some point to flow into multiple indoor units.

[0050] Multiple outdoor units may all be driven or at least some may not be driven, depending on the operating load corresponding to the operating amount of multiple indoor units. In this case, the refrigerant may be arranged to flow into and circulate to the outdoor units that are selectively driven through a flow path switching valve. The air conditioner may include an expansion device to lower the pressure of the refrigerant flowing into the heat exchanger. For example, the expansion device may be placed inside the indoor unit or inside the outdoor unit, or it may be placed in both.

[0051] For example, an expansion device can lower the temperature and pressure of the refrigerant by utilizing a throttling effect. The expansion device may include an orifice that can reduce the cross-sectional area of ​​the flow path. The temperature and pressure of the refrigerant passing through the orifice can be lowered.

[0052] The expansion device can be implemented, for example, as an electronic expansion valve capable of controlling the opening ratio (the ratio of the cross-sectional area of ​​the valve's flow path in the partially open state to the cross-sectional area of ​​the valve's flow path in the fully open state). The amount of refrigerant passing through the expansion device can be controlled depending on the opening ratio of the electronic expansion valve.

[0053] The air conditioner may further include a flow switching valve positioned on the refrigerant circulation path. The flow switching valve may include, for example, a 4-way valve. The flow switching valve can determine the refrigerant circulation path depending on the operating mode of the indoor unit (e.g., cooling operation or heating operation). The flow switching valve may be connected to the discharge port of the compressor.

[0054] The air conditioner may include an accumulator. The accumulator may be connected to the suction port of the compressor. Low-temperature, low-pressure refrigerant evaporated from an indoor heat exchanger or an outdoor heat exchanger may be introduced into the accumulator.

[0055] The accumulator can separate the refrigerant liquid from the refrigerant gas when the refrigerant mixed with the refrigerant gas is introduced, and supply the refrigerant gas from which the refrigerant liquid has been separated to the compressor.

[0056] An outdoor fan may be provided near the outdoor heat exchanger. The outdoor fan can blow outdoor air onto the outdoor heat exchanger to facilitate heat exchange between the refrigerant and the outdoor air.

[0057] The outdoor unit of the air conditioner may include at least one sensor. For example, the sensor of the outdoor unit may be provided as an environment sensor. The outdoor unit sensor may be placed at any location inside or outside the outdoor unit. For example, the outdoor unit sensor may include, for instance, a temperature sensor for detecting the air temperature around the outdoor unit, a humidity sensor for detecting the air humidity around the outdoor unit, a refrigerant temperature sensor for detecting the refrigerant temperature of the refrigerant pipe passing through the outdoor unit, or a refrigerant pressure sensor for detecting the refrigerant pressure of the refrigerant pipe passing through the outdoor unit.

[0058] The outdoor unit of the air conditioner may include an outdoor unit communication unit. The outdoor unit communication unit may be configured to receive control signals from the control unit of the indoor unit of the air conditioner, which will be described later. Based on the control signals received through the outdoor unit communication unit, the outdoor unit may control the operation of the compressor, outdoor heat exchanger, expansion device, flow path switching valve, accumulator, or outdoor fan. The outdoor unit may transmit a sensing value detected by the outdoor unit sensor to the control unit of the indoor unit through the outdoor unit communication unit.

[0059] The indoor unit of an air conditioner may include a housing, a blower that circulates air inside or outside the housing, and an indoor heat exchanger that exchanges heat with the air flowing into the housing.

[0060] The housing may include an intake port. Indoor air can be drawn into the interior of the housing through the intake port.

[0061] The indoor unit of the air conditioner may include a filter configured to filter foreign substances in the air entering the housing through the intake port.

[0062] The housing may include an outlet. Air flowing inside the housing can be discharged to the outside of the housing through the outlet.

[0063] The housing of the indoor unit may be provided with an airflow guide that guides the direction of air discharged through the outlet. For example, the airflow guide may include a blade located above the outlet. For example, the airflow guide may include an auxiliary fan for controlling the discharge airflow. The airflow guide may be omitted, but is not limited thereto.

[0064] An indoor heat exchanger and a blower may be provided inside the housing of the indoor unit, positioned on the path connecting the intake and exhaust ports.

[0065] The blower may include an indoor fan and a fan motor. For example, the indoor fan may include an axial fan, a mixed-flow fan, a cross-flow fan, or a centrifugal fan.

[0066] The indoor heat exchanger may be positioned between the blower and the outlet, or between the intake and the blower. The indoor heat exchanger may absorb heat from the air entering through the intake or transfer heat to the air entering through the intake. The indoor heat exchanger may include heat exchange tubes through which refrigerant flows, and heat exchange fins in contact with the heat exchange tubes to increase the heat transfer surface area.

[0067] The indoor unit of the air conditioner may include a drain tray positioned below the indoor heat exchanger to collect condensate generated from the indoor heat exchanger. The condensate contained in the drain tray may be drained to the outside through a drain hose. The drain tray may be provided to support the indoor heat exchanger.

[0068] The indoor unit of the air conditioner may include an input interface. The input interface may include any type of user input means, including buttons, switches, touch screens, and / or touch pads. The user can directly input setting data (e.g., desired indoor temperature, setting of operating mode for cooling / heating / dehumidification / air purification, setting of outlet selection, and / or setting of airflow) through the input interface.

[0069] The input interface may be connected to an external input device. For example, the input interface may be electrically connected to a wired remote controller. The wired remote controller may be installed at a specific location within the indoor space (e.g., a part of a wall). The user can input setting data regarding the operation of the air conditioner by operating the wired remote controller. An electrical signal corresponding to the setting data obtained through the wired remote controller may be transmitted to the input interface. Additionally, the input interface may include an infrared sensor. The user can input setting data regarding the operation of the air conditioner remotely using a wireless remote controller. The setting data input through the wireless remote controller may be transmitted to the input interface as an infrared signal.

[0070] Additionally, the input interface may include a microphone. A user's voice command may be acquired through the microphone. The microphone may convert the user's voice command into an electrical signal and transmit the converted electrical signal to the indoor unit control unit. The indoor unit control unit may control the components of the air conditioner to execute functions corresponding to the user's voice command. Setting data acquired through the input interface (e.g., desired indoor temperature, operating mode settings for cooling / heating / dehumidification / air purification, outlet selection settings, and / or airflow settings) may be transmitted to the indoor unit control unit described later. In one example, the setting data acquired through the input interface may be transmitted externally, namely to an outdoor unit or a server, through the indoor unit communication unit described later.

[0071] The indoor unit of the air conditioner may include a power module. The power module can be connected to an external power source to supply power to the components of the indoor unit.

[0072] The indoor unit of an air conditioner may include an indoor unit sensor. The indoor unit sensor may be an environment sensor placed in a space inside or outside the housing. For example, the indoor unit sensor may include one or more temperature sensors and / or humidity sensors placed in a predetermined space inside or outside the housing of the indoor unit. For example, the indoor unit sensor may include a refrigerant temperature sensor for detecting the refrigerant temperature of a refrigerant pipe passing through the indoor unit. For example, the indoor unit sensor may include respective refrigerant temperature sensors for detecting the inlet, intermediate, and / or outlet temperatures of a refrigerant pipe passing through an indoor heat exchanger.

[0073] For example, each environmental information detected by the indoor unit sensor may be transmitted to the indoor unit control unit described later, or transmitted to the outside through the indoor unit communication unit described later.

[0074] The indoor unit of an air conditioner may include an indoor unit communication unit. The indoor unit communication unit may include at least one of a short-range communication module or a long-range communication module. The indoor unit communication unit may include at least one antenna for wirelessly communicating with another device. The outdoor unit may include an outdoor unit communication unit. The outdoor unit communication unit may also include at least one of a short-range communication module or a long-range communication module.

[0075] A short-range wireless communication module may include, but is not limited to, a Bluetooth communication module, a BLE (Bluetooth Low Energy) communication module, a Near Field Communication module, a WLAN (Wi-Fi) communication module, a Zigbee communication module, an infrared (IrDA, infrared Data Association) communication module, a WFD (Wi-Fi Direct) communication module, an UWB (ultrawideband) communication module, an Ant+ communication module, a microwave (uWave) communication module, etc.

[0076] The long-distance communication module may include a communication module that performs various types of long-distance communication and may include a mobile communication unit. The mobile communication unit transmits and receives wireless signals with at least one of a base station, an external terminal, and a server on a mobile communication network.

[0077] The indoor unit communication unit can communicate with external devices, such as servers, mobile devices, and other home appliances, through nearby access points (APs). The access point (AP) can connect the local area network (LAN) to which the air conditioner or user device is connected to the wide area network (WAN) to which the server is connected. The air conditioner or user device can be connected to the server through the wide area network (WAN). The indoor unit of the air conditioner may include an indoor unit control unit that controls the indoor unit's components, such as a blower. The outdoor unit of the air conditioner may include an outdoor unit control unit that controls the outdoor unit's components, such as a compressor. The indoor unit control unit can communicate with the outdoor unit control unit through the indoor unit communication unit and the outdoor unit communication unit. The outdoor unit communication unit can transmit control signals generated by the outdoor unit control unit to the indoor unit communication unit, or transmit control signals transmitted from the indoor unit communication unit to the outdoor unit control unit. In other words, the outdoor unit and the indoor unit can communicate bidirectionally. The outdoor unit and the indoor unit can transmit and receive various signals generated during the operation of the air conditioner.

[0078] The outdoor unit control unit can be electrically connected to the components of the outdoor unit and can control the operation of each component. For example, the outdoor unit control unit can adjust the frequency of the compressor and control the flow path switching valve to switch the direction of refrigerant circulation. The outdoor unit control unit can adjust the rotational speed of the outdoor fan. In addition, the outdoor unit control unit can generate a control signal to adjust the opening of the expansion valve. Under the control of the outdoor unit control unit, refrigerant can circulate along a refrigerant circulation circuit including a compressor, a flow path switching valve, an outdoor heat exchanger, an expansion valve, and an indoor heat exchanger.

[0079] Various temperature sensors included in the outdoor and indoor units can each transmit an electrical signal corresponding to the detected temperature to the outdoor unit control unit and / or the indoor unit control unit. For example, humidity sensors included in the outdoor and indoor units can each transmit an electrical signal corresponding to the detected humidity to the outdoor unit control unit and / or the indoor unit control unit.

[0080] The indoor unit control unit can acquire user input from a user device, including a mobile device, through the indoor unit communication unit, and can acquire user input directly or through a remote controller via an input interface. The indoor unit control unit can control the components of the indoor unit, including a blower, in response to the received user input. The indoor unit control unit can transmit information regarding the received user input to the outdoor unit control unit of the outdoor unit.

[0081] The outdoor unit control unit can control the components of the outdoor unit, including the compressor, based on information regarding user input received from the indoor unit. For example, when the outdoor unit control unit receives a control signal from the indoor unit corresponding to user input selecting an operation mode such as cooling operation, heating operation, fan operation, defrosting operation, or dehumidification operation, it can control the components of the outdoor unit so that the operation of the air conditioner corresponding to the selected operation mode is performed.

[0082] The outdoor unit control unit and the indoor unit control unit may each include a processor and a memory. The indoor unit control unit may include at least one first processor and at least one first memory, and the outdoor unit control unit may include at least one second processor and at least one second memory.

[0083] The memory can store / remember various information required for the operation of the air conditioner. The memory can store instructions, applications, data, and / or programs required for the operation of the air conditioner. For example, the memory can store various programs for the cooling operation, heating operation, dehumidification operation, and / or defrosting operation of the air conditioner. The memory may include volatile memory such as S-RAM (Static Random Access Memory) and D-RAM (Dynamic Random Access Memory) for temporarily storing data. Additionally, the memory may include non-volatile memory such as ROM (Read Only Memory), EPROM (Erasable Programmable Read Only Memory), and EEPROM (Electrically Erasable Programmable Read Only Memory) for long-term data storage.

[0084] The processor can generate control signals to control the operation of the air conditioner based on instructions, applications, data, and / or programs stored in memory. As hardware, the processor may include logic circuits and arithmetic circuits. The processor can process data according to programs and / or instructions provided from memory and generate control signals according to the processing results. The memory and the processor may be implemented as a single control circuit or as multiple circuits.

[0085] The indoor unit of the air conditioner may include an output interface. The output interface is electrically connected to the indoor unit control unit and can output information related to the operation of the air conditioner under the control of the indoor unit control unit. For example, information such as the operating mode, airflow direction, airflow volume, and temperature selected by user input may be output. Additionally, the output interface may output sensing information obtained from the indoor unit sensor or the outdoor unit sensor, as well as warning / error messages.

[0086] The output interface may include a display and a speaker. The speaker can output various sounds as an acoustic device. The display may display information entered by the user or information provided to the user as various graphic elements. For example, operation information of the air conditioner may be displayed as at least one of an image or text. Additionally, the display may include an indicator that provides specific information. The display may include an LCD panel (Liquid Crystal Display Panel), an LED panel (Light Emitting Diode Panel), an OLED panel (Organic Light Emitting Diode Panel), a micro LED panel, and / or a plurality of LEDs.

[0087] Air conditioners according to various embodiments will be described in detail below with reference to the drawings.

[0088] FIG. 1 is a drawing showing an air conditioner according to one embodiment of the present disclosure.

[0089] An air conditioner according to one embodiment of the present disclosure includes an outdoor unit (2), an indoor unit (1), and a refrigerant pipe (4) for transferring refrigerant between them.

[0090] An air conditioner according to various embodiments can absorb heat from an air-conditioned space (hereinafter referred to as "indoor") and release heat to the outside of the air-conditioned space (hereinafter referred to as "outdoor") for cooling an air-conditioned space to be air-conditioned.

[0091] An air conditioner may include one or more outdoor units (2) installed outdoors and one or more indoor units (1) installed indoors. The outdoor units (2) may be electrically connected to the indoor units (1). For example, a user may input information (or commands) to control the indoor units (1) through a user interface, and the outdoor units (2) may operate in response to the user input of the indoor units (1).

[0092] The outdoor unit (2) is provided outdoors. The outdoor unit (2) can perform heat exchange between the refrigerant and the outdoor air by utilizing the phase change of the refrigerant (e.g., expansion or compression). For example, while the refrigerant is compressed in the outdoor unit (2), the refrigerant can release heat to the outdoor air. While the refrigerant is expanded in the outdoor unit (2), the refrigerant can absorb heat from the outdoor air.

[0093] The indoor unit (1) is installed indoors. The indoor unit (1) can be installed indoors in various forms. For example, the indoor unit (1) can be implemented in a stand-alone form, a wall-mounted form, a ceiling-mounted system air conditioner form, or a home multi-air conditioner form. The indoor unit (1) can perform heat exchange between the refrigerant and the indoor air by utilizing the phase change of the refrigerant (e.g., expansion or compression). For example, while the refrigerant is expanding in the indoor unit (1), the refrigerant can absorb heat from the indoor air, and the indoor space can be cooled. While the refrigerant is compressing in the indoor unit (1), the refrigerant can release heat to the indoor air, and the indoor space can be heated.

[0094] The outdoor unit (2) can be fluidly connected to the indoor unit (1) through the refrigerant pipe (4). Through the refrigerant pipe (4), refrigerant can be circulated between the outdoor unit (2) and the indoor unit (1). The refrigerant circulates through the compressor, outdoor heat exchanger, and expansion device of the outdoor unit (2) and the indoor heat exchanger of the indoor unit (1) through the refrigerant pipe (4).

[0095] The outdoor unit (2) can be connected to the indoor unit (1) so that refrigerant circulates through two refrigerant pipes (4). In the embodiment, the description focused on an example where two refrigerant pipes (4) are connected to the outdoor unit (2), but the number of refrigerant pipes (4) connected to the outdoor unit (2) is not limited to this and may vary depending on the number of indoor units (1).

[0096] FIG. 2 is an enlarged view of the part where the outdoor unit (2) and the refrigerant pipe (4) are connected in the air conditioner of FIG. 1.

[0097] Referring to FIG. 2, a plurality of service valves (3) may be arranged on one side of the outdoor unit (2). Each of the plurality of service valves (3) may include a valve body (31) protruding outside the housing of the outdoor unit (2), a refrigerant pipe connection port (32) provided to be connected to a refrigerant pipe (4), and a control valve (33) for controlling the amount of refrigerant injected. At least some of the service valves (3) may further include a refrigerant injection port (34) for injecting refrigerant.

[0098] The air purification device may include a refrigerant pipe connection kit (10) for connecting a refrigerant pipe (4) to an outdoor unit (2) or an indoor unit (1). The refrigerant pipe connection kit (10) may be configured to connect to an object requiring connection of the refrigerant pipe (4) from the outdoor unit (2) or the indoor unit (1). The refrigerant pipe connection kit (10) may be placed at the end of the refrigerant pipe (4). Through the refrigerant pipe (4) connected by the refrigerant pipe connection kit (10), the refrigerant discharged from the outdoor unit (2) may be transferred to the indoor unit (1), and the refrigerant discharged from the indoor unit (1) may be transferred to the outdoor unit (2).

[0099] In this way, for the refrigerant to move between the indoor unit (1) and the outdoor unit (2) through the refrigerant pipe (4), sealing is required at the connection point where the refrigerant pipe (4) is connected. The refrigerant pipe connection kit (10) may include a refrigerant pipe sealing connector (20) configured to prevent refrigerant leakage at the connection point where the outdoor unit (2) or the indoor unit (1) is connected to the refrigerant pipe (4).

[0100] FIGS. 3a and 3b are drawings for illustrating a refrigerant pipe sealing connector (20) of a refrigerant pipe connection kit (10) according to one embodiment.

[0101] Referring to FIGS. 3a and 3b, the refrigerant pipe sealing connector (20) may include a grip ring (22), an elastic member (23), and a fastening nut (21). The refrigerant pipe sealing connector (20) may further include a collect (24) that presses and collects the elastic member (23) when the fastening nut (21) is rotated.

[0102] The grip ring (22) can perform the function of supporting the refrigerant pipe (4) so ​​that the refrigerant pipe (4) does not come out in the opposite direction to the insertion direction when the refrigerant pipe (4) is inserted. In other words, the grip ring (22) can perform the function of preventing the refrigerant pipe (4) from coming out. The grip ring (22) can be placed inside the fastening nut (21).

[0103] The elastic member (23) is positioned between the grip ring (22) and the fastening nut (21) and can be elastically deformed when the fastening nut (21) rotates. When the fastening nut (21) rotates, the elastic member (23) is pressed by the fastening nut (21) and can perform the function of sealing the area around the refrigerant pipe (4). The elastic member (23) may be in the form of an O-ring, but is not necessarily limited thereto. There may be multiple elastic members (23), but is not necessarily limited thereto.

[0104] The fastening nut (21) can be configured to be fastened to an object to which the refrigerant pipe (4) is to be connected. For example, the fastening nut (21) may have threads formed on its inner surface to be fastened to the object. The fastening nut (21) may accommodate a grip ring (22) and an elastic member (23) inside. The fastening nut (21) can perform the function of securing the refrigerant pipe sealing connector (20) to the object and pressing the elastic member (23) during the fastening process. During the fastening process of the fastening nut (21), the fastening nut (21) can press the elastic member (23) through the collector (24).

[0105] A method for connecting a refrigerant pipe (4) to an object using such a refrigerant pipe sealing connector (20) is described.

[0106] First, the end of the refrigerant pipe (4) is inserted into the refrigerant pipe sealing connector (20) so that the refrigerant pipe (4) is fitted into the grip ring (22). The refrigerant pipe (4) is secured by the grip ring (22) so that it does not come out of the refrigerant pipe sealing connector (20) in the direction opposite to the insertion direction.

[0107] Next, referring to FIG. 3a, the fastening nut (21) of the refrigerant pipe sealing connector (20) into which the refrigerant pipe (4) is inserted can be temporarily fixed to an object, for example, a service valve (3). For example, the threads of the fastening nut (21) can be fitted to the threads formed on the outer surface of the object, and then the fastening nut (21) can be rotated. At this time, the fastening nut (21) may be temporarily fixed so as not to fall off the object. For example, the fastening nut (21) may be rotated by hand without a separate tool.

[0108] As the fastening nut (21) is rotated, the fastening nut (21) can move closer to the object. For example, the fastening nut (21) can rotate and move to the left.

[0109] Referring to FIG. 3b, as the fastening nut (21) rotates and moves, the elastic member (23) can be elastically deformed in a direction perpendicular to the direction of movement of the fastening nut (21). The gap between the refrigerant pipe (4) and the object can be filled by the elastic deformation of the elastic member (23).

[0110] However, depending on the number of rotations of the fastening nut (21), the degree of elastic deformation of the elastic member (23) may vary, and the degree of sealing of the refrigerant pipe sealing connector (20) may vary. In order to prevent leakage of refrigerant at the connection part of the refrigerant pipe (4), it is necessary to rotate the fastening nut (21) of the refrigerant pipe sealing connector (20) by a predetermined number of rotations during the connection process of the refrigerant pipe (4).

[0111] Generally, to connect the refrigerant pipe (4), workers insert the end of the refrigerant pipe (4) into the refrigerant pipe sealing connector (20), and then temporarily fix or assemble the refrigerant pipe sealing connector (20) with the refrigerant pipe (4) inserted therein to the object to which the refrigerant pipe (4) is to be connected. Next, the fastening nut (21) of the refrigerant pipe sealing connector (20) is rotated using a tool such as a spanner or wrench to fix the refrigerant pipe sealing connector (20) to the object.

[0112] In an ideal environment, during the process of connecting the refrigerant pipe (4), the workers can visually check whether the fastening nut (21) has been rotated a set number of times and whether the connection is complete.

[0113] However, in actual environments, due to spatial or environmental constraints, it often occurs that it is difficult for a worker to visually check whether the fastening nut (21) has been rotated and fastened by a set number of rotations. In particular, when connecting the refrigerant pipe (4) to the service valve (3) of the outdoor unit (2), the space where the outdoor unit (2) is installed may be very narrow or the outdoor unit (2) may be located in a high place, so it may be very difficult for a worker to visually check whether the fastening nut (21) has been rotated by a set number of rotations.

[0114] Considering these points, the refrigerant pipe connection kit (10) according to the embodiment may include an auditory guide jig (100; see FIG. 4) configured to allow auditory recognition of whether the fastening nut (21) has been rotated by a predetermined number of rotations and whether the fastening of the fastening nut (21) has been completed.

[0115] The auditory guide jig (100) may be configured to provide an auditory signal to an operator while the fastening nut (21) reaches a predetermined number of rotations or when the number of rotations is reached. For example, the auditory guide jig (100) may provide an auditory signal when the fastening nut (21) is rotating before the fastening nut (21) reaches a predetermined number of rotations. In this case, the auditory signal provided may be stopped when the fastening nut (21) reaches a predetermined number of rotations. As another example or additional example, the auditory guide jig (100) may provide an auditory signal when the fastening nut (21) reaches a predetermined number of rotations.

[0116] In this way, through the auditory guide jig (100), a predetermined sound is not produced or is produced when the fastening nut (21) reaches a predetermined number of rotations, so that the operator can audibly recognize the completion of fastening of the fastening nut (21).

[0117] FIG. 4 is an assembled perspective view for explaining a refrigerant pipe connection kit (10) according to one embodiment, and FIG. 5 is an exploded perspective view for explaining a refrigerant pipe connection kit (10) according to one embodiment. FIG. 6 is a perspective view showing the rotational friction member (120) and the fixed friction member (110) of the auditory guide jig (100) at different angles. FIG. 7 is a perspective view for explaining the installation of the auditory guide jig (100) according to one embodiment, and FIG. 8 is a perspective view for explaining the operation of the auditory guide jig (100) according to one embodiment. FIG. 9 is a cross-sectional view of the auditory guide jig (100) of FIG. 8 cut along the line IX-IX. FIG. 10 is a perspective view showing the state when the fastening nut (21) is completed in the refrigerant pipe connection kit (10) according to one embodiment. For convenience of explanation, FIG. 9 is illustrated with the auditory guide jig (100) as the center, and the illustration of the remaining components, excluding the fastening nut (21) of the refrigerant pipe sealing connector (20), has been omitted.

[0118] Referring to FIGS. 4 and 5, a refrigerant pipe connection kit (10) including an auditory guide jig (100) can be installed on an object. For example, the refrigerant pipe connection kit (10) can be installed on a service valve (3). The refrigerant pipe connection kit (10) can be installed to be connected to a refrigerant pipe connection port (32) of the service valve (3). Below, the description will focus on an example where the object is a service valve (3).

[0119] The refrigerant pipe connection kit (10) can be installed to be connected to the refrigerant pipe connection port (32) of the service valve (3). The refrigerant pipe connection kit (10) may include the refrigerant pipe sealing connector (20) described above and an auditory guide jig (100) used during the installation process of the refrigerant pipe sealing connector (20).

[0120] The auditory guide jig (100) may include a fixed friction member (110) and a rotating friction member (120).

[0121] The fixed friction member (110) may be configured to be fixed to an object. The fixed friction member (110) may be placed on the valve body (31) of the service valve (3). The fixed friction member (110) may include a seating groove (115) corresponding to the shape of the valve body (31). As the seating groove (115) is installed to contact the valve body (31), the fixed friction member (110) may be fixed without rotating when the rotating friction member (120) rotates.

[0122] Referring to FIGS. 4 to 6, the fixed friction member (110) can be assembled so that both ends (1102, 1103) are separably assembled from each other in the circumferential direction. An assembly groove (113) and an assembly projection (114) may be provided at both ends (1102, 1103) of the fixed friction member (110). An assembly groove (113) may be provided at one end (1102) of the fixed friction member (110), and an assembly projection (114) that is inserted into the assembly groove (113) may be provided at the other end (1103) of the fixed friction member (110).

[0123] When both ends (1102, 1103) of the fixed friction member (110) are assembled, the fixed friction member (110) may have a ring shape. The ring-shaped fixed friction member (110) may be positioned to surround a part of the valve body (31).

[0124] The fixed friction member (110) includes a first hinge portion (1101) that can be folded so that both ends (1102, 1103) are moved apart in the circumferential direction. The first hinge portion (1101) of the fixed friction member (110) may be thinner than the surrounding portion.

[0125] When the assembly projection (114) and assembly groove (113) of the fixed friction member (110) are separated and the two ends (1102, 1103) move apart, the first hinge portion (1101) can be folded. For example, the first hinge portion (1101) can be folded so that the valve body (31) can be inserted between the two ends (1102, 1103) that have moved apart. By folding the first hinge portion (1101) of the fixed friction member (110), the angle between the two ends (1102, 1103) can be spread to a predetermined angle centered on the first hinge portion (1101). For example, the fixed friction member (110) can be spread so that the angle between the two ends (1102, 1103) is 90 degrees (˚) to 180 degrees around the first hinge portion (1101).

[0126] A rotating friction member (120) may be positioned between a fixed friction member (110) and a fastening nut (21). The rotating friction member (120) may be configured to rotate by the fastening nut (21). The rotating friction member (120) may include at least one connecting projection (123) positioned on a surface facing the fastening nut (21). For example, the rotating friction member (120) may include a plurality of connecting projections (123).

[0127] The surface of the fastening nut (21) facing the rotational friction member (120) may include at least one connecting groove (211) into which at least one connecting projection (123) can be inserted. For example, the fastening nut (21) may include a plurality of connecting grooves (211). The plurality of connecting projections (123) may have a shape corresponding to the plurality of connecting grooves (211).

[0128] In the process of connecting the refrigerant pipe sealing connector (20), the fastening nut (21) comes into contact with the rotating friction member (120) and can be inserted into the connecting groove (211) of the fastening nut (21) and the connecting projection (123) of the rotating friction member (120). In this state, when the fastening nut (21) rotates, the rotating friction member (120) can rotate together with the fastening nut (21). In other words, the rotating friction member (120) and the fastening nut (21) can rotate in the same direction and at the same angle.

[0129] The rotational friction member (120) may include a hinge portion (1201) that can be folded so that both ends (1202, 1203) are separated. The hinge portion (1201) may be thinner than the surrounding portion. For example, the hinge portion (1201) may be folded so that a valve body (31) can be inserted between the separated ends (1202, 1203). By folding the hinge portion (1201) of the rotational friction member (120), the angle between the two ends (1202, 1203) can be spread to a predetermined angle centered on the hinge portion (1201). For example, the angle between the two ends (1202, 1203) centered on the hinge portion (1201) can be spread to 90 to 180 degrees.

[0130] The rotating friction member (120) can not only rotate by means of the fastening nut (21) but also move together with the fastening nut (21). As the rotating friction member (120) moves together with the fastening nut (21), it can press the fixed friction member (110).

[0131] When the rotating friction member (120) is rotated and moved by the fastening nut (21), the rotating friction member (120) can press the fixed friction member (110) in a direction in which both ends (1102, 1103) of the fixed friction member (110) spread apart. As an example for this, at least one of the rotating friction member (120) and the fixed friction member (110) may include a configuration for converting a force acting in the direction of movement of the rotating friction member (120) into a force in a direction in which both ends (1102, 1103) of the fixed friction member (110) spread apart. For example, the rotating friction member (120) may have a pressing surface (124) that presses the fixed friction member (110). The pressing surface (124) may have an inclination with respect to the rotation axis of the rotating friction member (120). As the pressure surface (124) has an incline, a force is applied to the fixed friction member (110) pressed by the rotational friction member (120) in a direction in which both ends (1102, 1103) spread apart, for example, in a radial direction perpendicular to the axis of rotation.

[0132] When the rotating friction member (120) rotates relative to the fixed friction member (110), an auditory signal may be generated due to frictional contact between the rotating friction member (120) and the fixed friction member (110). For this configuration, at least one friction protrusion (121) is provided on either the rotating friction member (120) or the fixed friction member (110), and a plurality of friction grooves (111) into which such friction protrusion (121) can be inserted may be provided on the other of the rotating friction member (120) and the fixed friction member (110).

[0133] For example, as shown in FIG. 6, a plurality of friction protrusions (121) may be provided on the rotating friction member (120), and a plurality of friction grooves (111) into which the friction protrusions (121) can be inserted may be provided on the fixed friction member (110). As another example, although not shown, friction protrusions (121) may be provided on the fixed friction member (110), and friction grooves (111) may be provided on the rotating friction member (120).

[0134] A plurality of friction protrusions (121) may be arranged along the circumferential direction. The friction protrusions (121) may move in a direction into which they are inserted into the friction groove (111). For example, the friction protrusions (121) may be placed at the free end of a rod (122) that extends along the circumferential direction.

[0135] A plurality of friction grooves (111) may be disposed on the surface of the fixed friction member (110) facing the rotating friction member (120). A plurality of friction grooves (111) may be arranged along the circumferential direction. A second friction projection (112) may be disposed between adjacent friction grooves (111).

[0136] With the rotating friction member (120) in contact with the fixed friction member (110), as the rotating friction member (120) rotates, the friction protrusion (121) of the rotating friction member (120) repeatedly inserts into and exits the friction groove (111) of the fixed friction member (110). During the process of the friction protrusion (121) being inserted into and exited from the friction groove (111), an auditory signal, such as a friction sound, is generated.

[0137] The spacing between the friction grooves (111) can be arranged closely so that an auditory signal is generated even during small rotations of the rotating friction member (120). For example, the spacing between the friction grooves (111) may be 10 degrees or less. For example, the spacing between the friction grooves (111) may be 1 to 10 degrees. For example, the spacing between the friction grooves (111) may be 2 to 7 degrees.

[0138] Below, the process of connecting a refrigerant pipe sealing connector (20) using an auditory guide jig (100) including the aforementioned rotating friction member (120) and fixed friction member (110) is described.

[0139] Referring to FIG. 5, in the refrigerant pipe connection method according to the embodiment, first, an auditory guide jig (100) is installed on the service valve (3) which is the target. Before connecting the refrigerant pipe sealing connector (20), a fixed friction member (110) and a rotating friction member (120) are installed.

[0140] To install the fixed friction member (110), first, the two ends (1102, 1103) are spread apart so that the first hinge portion (1101) of the fixed friction member (110) is folded. After passing the valve body (31) through the two spread ends (1102, 1103), the assembly grooves (113) and assembly protrusions (114) of the two ends (1102, 1103) are assembled. The fixed friction member (110) is positioned so that the valve body (31) is positioned in the seating groove (115).

[0141] To install the rotating friction member (120), the two ends (1202, 1203) are spread apart so that the hinge portion (1201) of the rotating friction member (120) folds. After positioning the rotating friction member (120) between the fixed friction member (110) and the refrigerant pipe connection port (32), the two ends (1202, 1203) of the rotating friction member (120) are closed.

[0142] Next, the fastening nut (21) of the refrigerant pipe sealing connector (20) into which the refrigerant pipe (4) is inserted is temporarily fixed to the refrigerant pipe connection port (32). In the step of temporarily fixing the fastening nut (21) to the refrigerant pipe connection port (32), the worker can temporarily fix it by turning it by hand.

[0143] When the fastening nut (21) is rotated while in a temporarily fixed state, the fastening nut (21) rotates and moves in a direction approaching the rotating friction member (120). As the fastening nut (21) moves, the connecting projection (123) of the rotating friction member (120) is inserted into the connecting groove (211) of the fastening nut (21).

[0144] Referring to FIGS. 6 and FIGS. 8, when the fastening nut (21) is rotated while the connecting projection (123) is inserted into the connecting groove (211), the fastening nut (21) rotates together with the rotating friction member (120).

[0145] During the process of the rotating friction member (120) rotating, the friction protrusion (121) of the rotating friction member (120) is repeatedly inserted into and removed from the friction groove (111) of the fixed friction member (110). During the process of the friction protrusion (121) being inserted into and removed from the plurality of friction grooves (111) arranged in the circumferential direction, an auditory signal such as a friction sound may be generated. An auditory signal may be generated during the process in which the friction protrusion (121) of the rotating friction member (120) and the second friction protrusion (112) of the fixed friction member (110) collide.

[0146] The operator can rotate the fastening nut (21) to reach a predetermined number of rotations based on an auditory signal generated by the auditory guide jig (100). For example, the operator can recognize whether the fastening of the fastening nut (21) is complete based on an auditory signal generated by the auditory guide jig (100). For example, if an auditory signal is generated when the fastening nut (21) is rotated, the operator can recognize that the fastening of the fastening nut (21) is not complete.

[0147] If the operator continues to rotate the fastening nut (21), the fastening nut (21) may reach a predetermined number of rotations. When the fastening nut (21) reaches a predetermined number of rotations, the fastening nut (21) may no longer rotate due to the threaded structure formed on the object. When the fastening nut (21) does not rotate, no auditory signal is generated by the friction protrusion (121) and the friction groove (111). Based on the fact that the auditory signal has stopped, the operator can recognize that the fastening of the fastening nut (21) is complete.

[0148] Additionally, as shown in FIG. 9, while the fastening nut (21) is rotating, the rotating friction member (120) rotating together with the fastening nut (21) can press the fixed friction member (110) through the pressing surface (124). The fixed friction member (110) is pressed by the pressing surface (124) of the rotating friction member (120), and a force is applied in the direction (direction of arrow A) in which both ends (1102, 1103) of the fixed friction member (110) spread apart.

[0149] When the fastening nut (21) reaches a predetermined number of rotations, as shown in FIG. 10, the assembly groove (113) and assembly projection (114) of the fixed friction member (110) are separated by pressure from the rotating friction member (120), and both ends (1102, 1103) can be spread apart. During the process of separating the assembly groove (113) and assembly projection (114) arranged at both ends (1102, 1103) of the fixed friction member (110), a second auditory signal different from the auditory signal generated by the friction projection (121) and the friction groove (111) may be generated. That is, during the process of separating the assembly groove (113) and the assembly projection (114), a sound different from the friction sound generated by the friction projection (121) and the friction groove (111) may be generated.

[0150] The worker can secondarily know that the fastening of the fastening nut (21) is completed based on the second auditory signal.

[0151] Afterward, the auditory guide jig (100) can be separated from the valve body (31). The rotating friction member (120) and the fixed friction member (110) are separated at both ends (1102, 1103) (1202, 1203), but the distance between the two ends (1102, 1103) (1202, 1203) may be smaller than the diameter of the valve body (31). Accordingly, the rotating friction member (120) and the fixed friction member (110) can be prevented from being separated and falling from the valve body (31) until the operator intentionally separates the rotating friction member (120) and the fixed friction member (110) from the valve body (31). Accordingly, the operator can prevent the auditory guide jig (100) from unintentionally falling during the connection process of the refrigerant pipe (4).

[0152] FIG. 11 is an assembled perspective view illustrating a refrigerant pipe connection kit (10A) according to one embodiment, and FIG. 12 is an exploded perspective view illustrating a refrigerant pipe connection kit (10A) according to one embodiment. FIG. 13 is a perspective view illustrating an auditory guide jig (100A) according to one embodiment. FIG. 14 is a perspective view illustrating the operation of an auditory guide jig (100A) according to one embodiment. FIG. 15 is a cross-sectional view of the auditory guide jig (100A) of FIG. 14. FIG. 16 is a perspective view showing the state when the fastening nut (21) is completed in the refrigerant pipe connection kit (10A) according to one embodiment.

[0153] Referring to FIGS. 11 to 13, the auditory guide jig (100A) of the refrigerant pipe connection kit (10A) according to one embodiment may be configured to generate an auditory signal when the fastening nut (21) reaches a predetermined number of rotations.

[0154] The auditory guide jig (100A) may be a single body. The auditory guide jig (100A) may be configured to have an adjustable diameter so as to be fitted around the circumference of the valve body (31). For example, the auditory guide jig (100A) may be configured so that both ends (1002, 1003) can move further apart or closer together.

[0155] For example, the auditory guide jig (100A) may have a structure in which both ends (1002, 1003) can be assembled in a circumferential direction. An assembly projection (101) and an assembly groove (102) may be provided on both ends (1002, 1003) of the auditory guide jig (100A). An assembly projection (101) may be provided on one end (1002) of the auditory guide jig (100A), and an assembly groove (102) may be provided on the other end (1003).

[0156] A second hinge portion (1001) may be disposed between the two ends (1002, 1003) of the auditory guide jig (100A). The second hinge portion (1001) may be folded so that the assembly projection (101) and the assembly groove (102) disposed on the two ends (1002, 1003) are joined or separated. By folding the second hinge portion (1001), the auditory guide jig (100A) may have the angle between the two ends (1002, 1003) spread out to a predetermined angle centered on the second hinge portion (1001). For example, the auditory guide jig (100A) may have the angle between the two ends (1002, 1003) spread out to 90 to 180 degrees centered on the second hinge portion (1001).

[0157] When rotated and moved by the fastening nut (21), the two ends (1002, 1003) of the auditory guide jig (100A) may be pressed in a direction that causes them to spread apart by the movement of the fastening nut (21). As an example for this, the auditory guide jig (100A) may include a pressure surface (103) positioned to face the fastening nut (21). The pressure surface (103) may be pressed by the fastening nut (21) when the fastening nut (21) approaches while rotating. The pressure surface (103) may be inclined with respect to the axis of rotation of the fastening nut (21). In other words, the pressure surface (103) may be inclined with respect to the direction of movement of the fastening nut (21).

[0158] When the fastening nut (21) moves while rotating, the fastening nut (21) presses the pressure surface (103) of the auditory guide jig (100A). Due to the pressure surface (103), a force is applied to the auditory guide jig (100A) in a direction in which both ends (1002, 1003) move away from each other.

[0159] When the fastening of the fastening nut (21) is completed, or in other words, when the fastening nut (21) is rotated by a predetermined number of rotations, the assembly protrusions (101) and assembly grooves (102) of both ends (1002, 1003) of the auditory guide jig (100A) can be separated. When the assembly protrusions (101) and assembly grooves (102) are separated, an auditory signal may be generated.

[0160] The size of the assembly protrusion (101) and the assembly groove (102) can be determined by considering the magnitude of the auditory signal generated when the assembly protrusion (101) and the assembly groove (102) are separated. For example, the size of the assembly protrusion (101) or the assembly groove (102) may occupy at least 70% of the width (W) of the pressure surface (103). The size of the assembly protrusion (101) or the assembly groove (102) may be 70% to 99% of the width (W) of the pressure surface (124).

[0161] The assembly process of the refrigerant pipe sealing connector (20) using the auditory guide jig (100A) according to the above-described embodiment can proceed as follows.

[0162] First, referring to FIGS. 12 and 13, an auditory guide jig (100A) is installed on an object. For example, the two ends (1002, 1003) of the auditory guide jig (100A) can be spread apart to fit the auditory guide jig (100A) around the circumference of the valve body (31). The assembly protrusions (114) and assembly grooves (113) of the two ends (1002, 1003) of the auditory guide jig (100A) are assembled to surround the circumference of the valve body (31).

[0163] In this state, the fastening nut (21) of the refrigerant pipe sealing connector (20) into which the refrigerant pipe (4) is inserted is temporarily fixed. With the fastening nut (21) temporarily fixed, as the fastening nut (21) is turned, the fastening nut (21) rotates and approaches the auditory guide jig (100A).

[0164] Referring to FIGS. 14 and 15, based on the auditory signal generated in the auditory guide jig (100A), the fastening nut (21) can be rotated to reach a number of rotations.

[0165] As the fastening nut (21) is rotated, the fastening nut (21) comes into contact with the pressure surface (03) of the auditory guide jig (100A). When the fastening nut (21) is rotated while in contact with the pressure surface (103), a force is applied to the auditory guide jig (100A) in a direction that causes both ends (1002, 1003) of the auditory guide jig (100A) to move away from each other due to the pressure exerted by the fastening nut (21).

[0166] As shown in FIG. 16, when the fastening nut (21) is rotated by a predetermined number of rotations, the assembly groove (102) and assembly projection (101) placed at both ends (1002, 1003) of the auditory guide jig (100A) are separated by the force applied to the auditory guide jig (100A), and an auditory signal is generated.

[0167] The operator can recognize that the fastening of the fastening nut (21) is complete based on the auditory signal. The operator can further spread the two ends (1002, 1003) of the auditory guide jig (100A) that are separated, and separate the auditory guide jig (100A) from the valve body (31).

[0168] Meanwhile, in the embodiments described above, the service valve (3) of the outdoor unit (2) was exemplified as the object on which the refrigerant pipe connection kit (10) is used. However, the object on which the refrigerant pipe connection kit (10) is used is not necessarily limited to this and may be applied to various configurations where the connection of the refrigerant pipe (4) is required. Furthermore, although the above-described refrigerant pipe connection kit (10) and the auditory guide jig (100, 100A) have been described primarily as being used for connecting the refrigerant pipe (4) where sealing is required, they may not be limited to this. For example, the refrigerant pipe connection kit (10) and the auditory guide jig (100, 100A) can be applied in various ways, even to pipes other than the refrigerant pipe (4), as long as sealing is required.

[0169] The above examples are merely illustrative, and various modifications and equivalent alternative embodiments are possible therefrom for those skilled in the art. Accordingly, the true technical scope of protection of the present invention must be determined by the technical concept of the invention as described in the following claims.

[0170] One aspect of the present disclosure provides a refrigerant pipe connection kit and a method for connecting a refrigerant pipe using the same, wherein a worker connecting a refrigerant pipe to an object can easily audibly know that the fastening of a fastening nut is complete.

[0171] A refrigerant pipe connection kit according to one embodiment is for connecting a refrigerant pipe to a target body and may include: a refrigerant pipe sealing connector comprising a fastening nut configured to be fastened to the target body, a grip ring disposed inside the fastening nut to prevent the refrigerant pipe from detaching, and an elastic member disposed inside the fastening nut that elastically deforms when the fastening nut rotates; and an auditory guide jig configured to allow auditory recognition of whether the fastening of the fastening nut is completed when the fastening nut is rotated by a predetermined number of rotations.

[0172] The above auditory guide jig may be configured to provide the auditory signal when the fastening nut rotates so that the fastening nut reaches a predetermined number of rotations.

[0173] The above auditory guide jig may include a fixed friction member configured to be fixed to the object, and a rotating friction member disposed between the fixed friction member and the fastening nut and configured to rotate together when the fastening nut rotates.

[0174] When the above-mentioned rotating friction member rotates relative to the above-mentioned fixed friction member, the above-mentioned auditory signal may be generated due to frictional contact between the above-mentioned rotating friction member and the above-mentioned fixed friction member.

[0175] At least one friction protrusion is provided in either the fixed friction member or the rotating friction member, and a plurality of friction grooves into which the at least one friction protrusion can be inserted may be provided in the other of the fixed friction member and the rotating friction member.

[0176] When the above-mentioned rotating friction member rotates, the at least one friction projection is inserted into and removed from the plurality of friction grooves, thereby generating the auditory signal.

[0177] The above fastening nut includes at least one connecting groove disposed on a surface facing the rotational friction member, and the rotational friction member may include at least one connecting projection that can be inserted into the at least one connecting groove.

[0178] With the at least one connecting projection inserted into the at least one connecting groove, the rotating friction member can rotate together when the fastening nut rotates.

[0179] In the above fixed friction member, assembly protrusions and assembly grooves that can be assembled with each other are arranged at both ends in the circumferential direction, and a first hinge portion that can be folded so that the two ends are separated may be arranged between the two ends.

[0180] When the above-mentioned rotating friction member is rotated and moved by the above-mentioned fastening nut, the above-mentioned rotating friction member can apply pressure in the direction in which the two ends of the above-mentioned fixed friction member spread apart.

[0181] When the above fastening nut reaches a predetermined number of rotations, the assembly projection and the assembly groove are separated in the fixed friction member pressed by the rotational friction member, and a second auditory signal different from the auditory signal may be generated.

[0182] The above auditory guide jig may be configured to generate the auditory signal when the fastening nut reaches a predetermined number of rotations.

[0183] The above auditory guide jig has assembly protrusions and assembly grooves arranged at both ends in the circumferential direction that can be assembled with each other, and a second hinge portion arranged between the two ends that can be folded so that the two ends move apart.

[0184] When rotated and moved by the above-mentioned fastening nut, the movement of the above-mentioned fastening nut may cause the two ends of the above-mentioned auditory guide jig to be pressed in a direction that spreads apart.

[0185] When the above fastening nut reaches a predetermined number of rotations, the assembly projection and the assembly groove are separated in the auditory guide jig pressed by the above fastening nut, and an auditory signal may be generated.

[0186] An auditory guide jig according to one embodiment is for checking whether the fastening of a refrigerant pipe sealing connector is completed, wherein the refrigerant pipe sealing connector comprises a fastening nut configured to be fastened to the object, a grip ring disposed inside the fastening nut to prevent the refrigerant pipe from detaching, and an elastic member disposed inside the fastening nut that undergoes elastic deformation when the fastening nut is rotated. The auditory guide jig may be configured to allow auditory recognition of whether the fastening of the fastening nut is completed when the fastening nut is rotated by a predetermined number of rotations.

[0187] A method for connecting a refrigerant pipe according to one embodiment may include: installing an auditory guide jig on an object; temporarily fixing a fastening nut of a refrigerant pipe sealing connector into which a refrigerant pipe is inserted to the object; and rotating the fastening nut to reach a predetermined number of rotations based on an auditory signal generated by the auditory guide jig.

[0188] The above auditory guide jig may include a fixed friction member configured to be fixed to the object, and a rotating friction member disposed between the fixed friction member and the fastening nut and configured to rotate together when the fastening nut rotates.

[0189] In the step of rotating the above-mentioned fastening nut, when the rotating friction member rotates relative to the fixed friction member, an auditory signal may be generated due to frictional contact between the rotating friction member and the fixed friction member.

[0190] According to one embodiment of the present disclosure, the refrigerant pipe connection kit and the refrigerant pipe connection method using the same allow a worker to easily know that the fastening of the fastening nut is complete by generating or stopping a sound when the fastening nut is completed.

[0191] The effects obtainable from the present disclosure are not limited to those mentioned above, and other unmentioned effects will be clearly understood by those skilled in the art to which the present disclosure belongs from the description below.

Claims

1. A refrigerant pipe connection kit (10) for connecting a refrigerant pipe (4) to a target body, A refrigerant pipe sealing connector (20) comprising a fastening nut (21) configured to be fastened to the above-mentioned object, a grip ring (22) disposed inside the fastening nut to prevent the refrigerant pipe from detaching, and an elastic member (23) disposed inside the fastening nut to be elastically deformed when the fastening nut is rotated; and A refrigerant pipe connection kit comprising: an auditory guide jig (100, 100A) configured to allow auditory recognition of whether the fastening nut is completed by rotating the fastening nut by a predetermined number of rotations.

2. In Paragraph 1, The above auditory guide jig (100) is, A refrigerant pipe connection kit configured to provide the auditory signal when the fastening nut is rotated so that the fastening nut reaches a predetermined number of rotations.

3. In Paragraph 2, The above auditory guide jig (100) is, A fixed friction member (110) configured to be fixed to the above object, and It includes a rotating friction member (120) disposed between the fixed friction member and the fastening nut and configured to rotate together when the fastening nut rotates, A refrigerant pipe connection kit in which, when the rotating friction member rotates relative to the fixed friction member, the auditory signal is generated due to frictional contact between the rotating friction member and the fixed friction member.

4. In Paragraph 3, At least one friction projection (121) is provided on either the fixed friction member or the rotating friction member. In the other of the fixed friction member and the rotating friction member, a plurality of friction grooves (111) into which the at least one friction projection can be inserted are provided. A refrigerant pipe connection kit in which, when the above-mentioned rotating friction member rotates, the at least one friction projection is inserted into and removed from the plurality of friction grooves to generate the auditory signal.

5. In Paragraph 3 or 4, The above fastening nut includes at least one connecting groove (211) disposed on a surface facing the rotational friction member, and The above-mentioned rotational friction member includes at least one connecting projection (123) that can be inserted into the at least one connecting groove, and A refrigerant pipe connection kit in which, with at least one connecting projection inserted into at least one connecting groove, the rotating friction member rotates together when the fastening nut rotates.

6. In any one of paragraphs 3 through 5, In the above fixed friction member, Assembly protrusions (114) and assembly grooves (113) that can be assembled with each other are arranged at both ends (1102, 1103) in the circumferential direction, A refrigerant pipe connection kit having a first hinge portion (1101) disposed between the two ends such that the two ends can be folded apart.

7. In Paragraph 6, A refrigerant pipe connection kit in which, when the above-mentioned rotating friction member is rotated and moved by the above-mentioned fastening nut, the above-mentioned rotating friction member presses the above-mentioned two ends of the above-mentioned fixed friction member in a direction in which they spread apart.

8. In Paragraph 7, A refrigerant pipe connection kit in which, when the above-mentioned fastening nut reaches a predetermined number of rotations, the assembly projection and the assembly groove are separated in the above-mentioned fixed friction member, which is pressed by the above-mentioned rotating friction member, thereby generating a second auditory signal different from the above-mentioned auditory signal.

9. In any one of paragraphs 1 through 8, The above auditory guide jig (100A) is, A refrigerant pipe connection kit configured to generate an auditory signal when the above-mentioned fastening nut reaches a predetermined number of rotations.

10. In Paragraph 9, The above auditory guide jig (100A) is, Assembly protrusions (101) and assembly grooves (102) that can be assembled with each other are arranged at both ends (1002, 1003) in the circumferential direction, and A refrigerant pipe connection kit having a second hinge portion (1001) disposed between the two ends such that the two ends can be folded apart.

11. In Paragraph 10, A refrigerant pipe connection kit in which, when rotated and moved by the above-mentioned fastening nut, the two ends of the above-mentioned auditory guide jig are pressed in a direction that spreads apart by the movement of the above-mentioned fastening nut.

12. In Paragraph 11, A refrigerant pipe connection kit in which, when the above-mentioned fastening nut reaches a predetermined number of rotations, the assembly projection and the assembly groove are separated in the above-mentioned auditory guide jig pressed by the above-mentioned fastening nut, thereby generating an auditory signal.

13. An auditory guide jig for checking whether the connection of the refrigerant pipe seal connector is complete, The above refrigerant pipe sealing connector comprises a fastening nut configured to be fastened to an object, a grip ring disposed inside the fastening nut to prevent the refrigerant pipe from detaching, and an elastic member disposed inside the fastening nut that undergoes elastic deformation when the fastening nut rotates. The above auditory guide jig is configured to allow auditory recognition of whether the fastening nut has been completed by rotating the fastening nut by a predetermined number of rotations.

14. Step of installing an auditory guide jig on the object; A step of temporarily fixing a fastening nut of a refrigerant pipe sealing connector into which a refrigerant pipe is inserted to the object; and A method for connecting a refrigerant pipe, comprising the step of rotating the fastening nut to reach a predetermined number of rotations based on an auditory signal generated in the auditory guide jig.

15. In Paragraph 14, The above auditory guide jig includes a fixed friction member configured to be fixed to the object, and a rotating friction member disposed between the fixed friction member and the fastening nut and configured to rotate together when the fastening nut rotates. A method for connecting a refrigerant pipe, wherein in the step of rotating the fastening nut, when the rotating friction member rotates relative to the fixed friction member, an auditory signal is generated due to frictional contact between the rotating friction member and the fixed friction member.

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