Indoor unit and air conditioning system

Abstract

The invention discloses an indoor unit and an air conditioning system.The indoor unit comprises a heat exchanger, a plurality of refrigerant flow channels are formed in the heat exchanger, and refrigerant pipes communicating with the refrigerant flow channels are arranged at the ends of the heat exchanger; the sealing shell is connected to the end portion of the heat exchanger, the sealing shell covers the refrigerant pipe, the sealing shell is matched with the end portion of the heat exchanger in a sealing mode so as to define an exhaust space for containing the refrigerant pipe, and the exhaust space is communicated with the exhaust port. According to the indoor unit, the sealing shell is arranged at the end of the heat exchanger, one side of the refrigerant pipe can be sealed, after the refrigerant leaks, the pressure of the exhaust space in the sealing shell can be increased, the refrigerant can be exhausted from the exhaust port, the indoor unit is simple in structure, the refrigerant can be conveniently exhausted, a refrigerant sensor can be arranged, refrigerant leakage can be processed in a centralized mode, protection can be conducted, and the service life of the indoor unit is prolonged. Safety, reliability and low cost are realized.

Description

Technical Field

[0001] The present invention relates to the technical field of household electrical appliances, and in particular to an indoor unit and an air-conditioning system having the indoor unit. Background Art

[0002] Currently, air conditioners are indoor heating and cooling equipment. As users use them for a longer period of time, there may be refrigerant leakage in the indoor heat exchanger. Most existing air conditioning equipment is equipped with two or more refrigerant sensors for refrigerant detection and alarm processing. The cost of this setting is too high, and the sealing structure for refrigerant leakage is large in size, which is prone to safety problems such as excessive refrigerant leakage. There is room for improvement. Summary of the invention

[0003] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention provides an indoor unit, which can increase the pressure of the exhaust space after the refrigerant leaks, and can discharge the refrigerant from the exhaust port, and has a simple structure and low cost.

[0004] According to an embodiment of the present invention, the indoor unit includes: a heat exchanger, wherein a plurality of refrigerant flow channels are provided in the heat exchanger, and a refrigerant pipe connected to the refrigerant flow channels is provided at an end of the heat exchanger; a sealing shell, wherein the sealing shell is connected to the end of the heat exchanger, and the sealing shell cover is provided outside the refrigerant pipe, and the sealing shell and the end of the heat exchanger are sealed to define an exhaust space for accommodating the refrigerant pipe, and the exhaust space is connected to the exhaust port.

[0005] According to the indoor unit of the embodiment of the present invention, a sealing shell is provided at the end of the heat exchanger, so that one side of the refrigerant pipe can be sealed, and after the refrigerant leaks, the pressure of the exhaust space in the sealing shell can be increased, and the refrigerant can be discharged from the exhaust port. It has a simple structure, which is convenient for refrigerant discharge, and a refrigerant sensor can be provided to centrally handle refrigerant leakage and report protection, which is safe, reliable and low-cost.

[0006] According to some embodiments of the indoor unit of the present invention, the refrigerant pipe is provided at both ends of the heat exchanger, and the sealed shell includes a first shell and a second shell, the first shell and the second shell are respectively connected to the two ends of the heat exchanger and are respectively covered with corresponding refrigerant pipes, the first shell and the second shell are connected through a bypass pipe, and one of the first shell and the second shell is provided with the exhaust port.

[0007] According to some embodiments of the indoor unit of the present invention, the bypass pipe is configured as a hose having one end connected to the outer peripheral wall of the first shell and the other end connected to the outer peripheral wall of the second shell, and a middle portion of the hose bypasses the heat exchanger.

[0008] According to the indoor unit of some embodiments of the present invention, a refrigerant sensor is provided in the first shell or the second shell.

[0009] According to some embodiments of the indoor unit of the present invention, the refrigerant pipe includes a first arc-shaped pipe, a second arc-shaped pipe, an inlet pipe and an outlet pipe, the first arc-shaped pipe, the inlet pipe and the outlet pipe are located in the first shell, and the inlet pipe and the outlet pipe are both configured to at least partially extend from the first shell to communicate with an external refrigerant pipeline, the second arc-shaped pipe is located in the second shell, the first arc-shaped pipe and the second arc-shaped pipe are both used to connect two adjacent refrigerant flow channels, and the exhaust port is provided in the second shell.

[0010] According to some embodiments of the present invention, the indoor unit further includes a shell, the heat exchanger is installed in the shell, the two ends of the heat exchanger respectively define a first end space and a second end space with the shell, the first shell is located in the first end space, and the second shell is located in the second end space.

[0011] According to the indoor unit of some embodiments of the present invention, the shell is provided with a drain pipe, the exhaust port is connected to an exhaust hose, the exhaust hose is communicated with the drain pipe, and the drain pipe passes through the shell and is suitable for extending to the outdoors.

[0012] The invention also provides an air conditioning system.

[0013] According to an embodiment of the present invention, an air-conditioning system includes a controller, a compressor, an outdoor unit and an indoor unit of any one of the above embodiments, the compressor, the outdoor unit and the indoor unit are connected in series to form a refrigerant circuit, a refrigerant sensor is provided in the exhaust space, the refrigerant sensor is electrically connected to the controller, and the controller is configured to perform a safety protection action after the refrigerant sensor reaches a set state.

[0014] According to some embodiments of the air conditioning system of the present invention, the set state includes: when the detection value of the refrigerant sensor is greater than a first set concentration and lasts for a first set time;

[0015] And / or, the detection value of the refrigerant sensor is greater than a second set concentration, and the second set concentration is greater than the first set concentration;

[0016] And / or, the refrigerant sensor sends an alarm signal;

[0017] And / or, the refrigerant sensor fails or is disconnected for a second set time period.

[0018] According to some embodiments of the air conditioning system of the present invention, the safety protection action includes: controlling the outdoor unit to shut down;

[0019] and / or, controlling the fan of the indoor unit to run at a maximum wind speed when the indoor unit is turned on;

[0020] and / or, when the indoor unit is off, controlling the indoor unit to be turned on and to run at a maximum speed in an air supply mode within a third set time period;

[0021] and / or, controlling the air guide strip of the indoor unit to open to a maximum angle;

[0022] and / or, controlling the indoor unit to display a fault code;

[0023] and / or, controlling the indoor unit not to receive an external control signal;

[0024] And / or, controlling a buzzer of the air-conditioning system to be turned on for at least a fourth set time period.

[0025] The advantages of the air conditioning system and the indoor unit described above compared to the prior art are the same and will not be described in detail here.

[0026] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0028] Figure 1 is a schematic structural diagram of an indoor unit according to an embodiment of the present invention;

[0029] Figure 2 is a schematic structural diagram of a heat exchanger of an indoor unit according to an embodiment of the present invention;

[0030] Figure 3 is a flow diagram of refrigerant leakage in an indoor unit according to an embodiment of the present invention;

[0031] Figure 4 1 is a logic judgment diagram of refrigerant leakage of an indoor unit according to an embodiment of the present invention.

[0032] Reference numerals:

[0033] Indoor unit 100,

[0034] Heat exchanger 1, refrigerant pipe 11, first arc-shaped pipe 111, second arc-shaped pipe 112, inlet pipe 113, outlet pipe 114, refrigerant flow channel 12,

[0035] The sealed shell 2 , the first shell 21 , the second shell 22 , the bypass pipe 23 , the shell body 3 , the first end space 31 , the second end space 32 , and the drain pipe 33 . DETAILED DESCRIPTION

[0036] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0037] Reference below Figure 1-Figure 4 The indoor unit 100 according to an embodiment of the present invention is described. By sealingly connecting the sealing shell 2 with the end of the heat exchanger 1, an exhaust space can be formed outside the refrigerant pipe 11. When the refrigerant leakage concentration in the exhaust space becomes large, it is discharged from the exhaust hole of the exhaust space, which is beneficial to the timely handling of the refrigerant leakage, safe and reliable.

[0038] like Figure 1-Figure 4 As shown, the indoor unit 100 according to the embodiment of the present invention includes: a heat exchanger 1 and a sealed shell 2.

[0039] A plurality of refrigerant flow channels 12 are provided in the heat exchanger 1 for circulating the refrigerant, and the refrigerant passes through the plurality of refrigerant flow channels 12 to exchange heat with the indoor air, and can realize continuous and effective heat exchange to achieve the effects of cooling and heating. A refrigerant pipe 11 connected to the refrigerant flow channel 12 is provided at the end of the heat exchanger 1. In this way, the refrigerant flow channel 12 can be connected to the external refrigerant pipe 11 through the refrigerant pipe 11, so that the inflow and outflow of the refrigerant can be realized.

[0040] In this embodiment, the refrigerant is R454B. The refrigerant is used as a heat transfer medium. The refrigerant circulates through the refrigerant flow channel 12 to achieve heat exchange between indoor and outdoor areas.

[0041] The sealing shell 2 is connected to the end of the heat exchanger 1, and the sealing shell 2 is arranged outside the refrigerant pipe 11. The sealing shell 2 and the end of the heat exchanger 1 are sealed to define an exhaust space for accommodating the refrigerant pipe 11, and the exhaust space is connected to the exhaust port.

[0042] Specifically, a plurality of refrigerant flow channels 12 are provided inside the heat exchanger 1, and an end of the heat exchanger 1 is connected with a plurality of refrigerant pipes 11 outside the plurality of refrigerant flow channels 12. A sealing shell 2 is also provided at the end of the heat exchanger 1, and the sealing shell 2 is covered on the outside of the refrigerant pipe 11, so as to seal the space where the refrigerant pipe 11 is located, and the sealing shell 2 is sealed and connected to the end of the heat exchanger 1, and the space between the sealing shell 2 and the heat exchanger 1 is an exhaust space. During the long-term use of the heat exchanger 1, refrigerant leakage may occur at the connection between the refrigerant pipe 11 and the plurality of refrigerant flow channels 12. By sealing the exhaust space of the refrigerant pipe 11, the air pressure in the exhaust space may increase after the refrigerant pipe 11 leaks, and an exhaust port is provided in the exhaust space, and the exhaust space is connected with the outside of the heat exchanger 1 through the exhaust port. After the air pressure increases, the refrigerant is discharged from the exhaust port to reduce the refrigerant concentration in the exhaust space, realize timely discharge of the refrigerant, ensure the safety of equipment use, and according to the refrigerant discharge to a certain concentration, the system starts protection measures and performs after-sales maintenance.

[0043] Thus, by setting the sealing shell 2 outside the refrigerant pipe 11, the safe discharge of the refrigerant can be achieved, and this discharge method is a pure structure, and no refrigerant sensor detection is required. At the same time, in another setting method, a refrigerant sensor can be set to detect the refrigerant leakage to a certain concentration before discharging. The above two methods can achieve effective discharge of refrigerant leakage, and compared with the prior art, its structure is simple, and the sensor setting cost is reduced.

[0044] According to the indoor unit 100 of the embodiment of the present invention, a sealing shell 2 is provided at the end of the heat exchanger 1, so that one side of the refrigerant pipe 11 can be sealed, and after the refrigerant leaks, the pressure of the exhaust space in the sealing shell 2 can be increased, and the refrigerant can be discharged from the exhaust port. It has a simple structure, which is convenient for refrigerant discharge, and a refrigerant sensor can be provided to centrally handle refrigerant leakage and report protection, which is safe, reliable and low-cost.

[0045] In some embodiments, a refrigerant pipe 11 is provided at both ends of the heat exchanger 1, and the sealed shell 2 includes a first shell 21 and a second shell 22. The first shell 21 and the second shell 22 are respectively connected to the two ends of the heat exchanger 1 and are respectively covered with the corresponding refrigerant pipes 11. The first shell 21 and the second shell 22 are connected through a bypass pipe 23, and one of the first shell 21 and the second shell 22 is provided with an exhaust port. The exhaust port can be set in the first shell 21 or in the second shell 22, and the leaked refrigerant can be discharged through the bypass pipe 23, thereby realizing centralized treatment of the leaked refrigerant.

[0046] Specifically, both ends of the heat exchanger 1 are provided with a refrigerant pipe 11, and the refrigerant pipe 11 can be constructed in a U shape, which can connect multiple refrigerant flow channels 12 in the heat exchanger 1, and can realize the continuous circulation of the refrigerant in the heat exchanger 1, wherein the sealed shell 2 is divided into a first shell 21 and a second shell 22, such as Figure 2As shown, the first shell 21 can be located on the right side of the heat exchanger 1, and the second shell 22 is located on the left side of the heat exchanger 1. The first shell 21 and the second shell 22 are respectively sealed and connected to the two ends of the heat exchanger 1, and the first shell 21 and the second shell 22 are respectively covered on the outside of the corresponding refrigerant pipes 11, so that the space where the refrigerant pipes 11 at both ends are located can be sealed. This setting method only seals the refrigerant pipes 11 with leakage risks, which can make the sealing structure simple and low-cost.

[0047] A bypass pipe 23 is connected between the first shell 21 and the second shell 22 to realize the communication between the first shell 21 and the second shell 22, and one of the two is provided with an exhaust port. If the bypass pipe 23 is connected to the exhaust port, the refrigerant leaked from the first shell 21 or the second shell 22 can be discharged centrally through the bypass pipe 23, and the safety after discharge can be guaranteed.

[0048] In some embodiments, the bypass pipe 23 is configured as a hose, one end of which is connected to the outer peripheral wall of the first shell 21 and the other end of which is connected to the outer peripheral wall of the second shell 22 , and the middle portion of the hose bypasses the heat exchanger 1 .

[0049] Specifically, the bypass pipe 23 can be constructed as a hose, which has strong flexibility and can withstand high and low temperatures, such as Figure 2 As shown, one end of the hose is connected to the outer peripheral wall of the first shell 21, and the other end is connected to the outer peripheral wall of the second shell 22, so that the two ends of the hose can be fixed, and the installation of the hose can be completed. The middle part of the hose bypasses the heat exchanger 1, that is, the hose can be distributed along the length direction of the heat exchanger 1. The hose can also be bent along the heat exchanger 1, and the hose has a small diameter. In this way, the leaked refrigerant can be discharged through the hose, and the small diameter has high discharge efficiency, and the structural setting is simple, easy to assemble and maintain.

[0050] Therefore, by setting the connection between the first shell 21, the second shell 22 and the bypass pipe 23, the refrigerant leaked in the first shell 21 or the second shell 22 can be discharged in time. This discharge method is that the structural channel is connected, and the discharge is carried out through the rising air pressure in the leakage space. There is no need to set a refrigerant sensor for detection before discharge, and the refrigerant discharge method is simpler.

[0051] It should be noted that when the refrigerant leakage increases, the operating parameters such as the frequency, current, exhaust and pipe temperature of the heat exchanger 1 of the prototype are detected to determine the refrigerant leakage and report the protection to the user, such as Figure 4 In the left side logical judgment of the refrigerant leakage, if the refrigerant remaining is detected to be 30% or less, a protection alarm can be issued to remind the user to perform after-sales inspection and maintenance.

[0052] In some embodiments, a refrigerant sensor is disposed in the first shell 21 or in the second shell 22 .

[0053] Specifically, the discharge of leaked refrigerant can be achieved by setting a refrigerant sensor. For example, a refrigerant sensor can be set in the first shell 21, or in the second shell 22. Both of these settings can detect the concentration of the leaked refrigerant. When the concentration of the refrigerant detected by the refrigerant sensor reaches a certain concentration value, the refrigerant can be discharged through a control signal. In this way, accurate detection and discharge of the leaked refrigerant can be achieved. This method has an additional refrigerant sensor control function compared to the above-mentioned pure structural method, and can achieve effective discharge of the refrigerant.

[0054] Therefore, by setting the above-mentioned sealing shell 2 and bypass pipe 23, the leaked refrigerant can be concentrated to the indoor unit 100 away from the electrical control box (on the left side of the heat exchanger 1), and a refrigerant sensor is set to detect refrigerant leakage. According to the detection result, it can be determined whether to enter the protection mode.

[0055] In some embodiments, the refrigerant pipe 11 includes a first arc-shaped pipe 111, a second arc-shaped pipe 112, an inlet pipe 113 and an outlet pipe 114. The first arc-shaped pipe 111, the inlet pipe 113 and the outlet pipe 114 are located in the first shell 21, and the inlet pipe 113 and the outlet pipe 114 are both configured to at least partially extend from the first shell 21 to communicate with the external refrigerant pipe 11. The second arc-shaped pipe 112 is located in the second shell 22. The first arc-shaped pipe 111 and the second arc-shaped pipe 112 are both used to connect two adjacent refrigerant flow channels 12.

[0056] Specifically, the refrigerant pipe 11 includes four parts, namely a first arc-shaped pipe 111, a second arc-shaped pipe 112, an inlet pipe 113 and an outlet pipe 114, wherein the first arc-shaped pipe 111, the inlet pipe 113 and the outlet pipe 114 are connected to one end of the heat exchanger 1 and are located in the first shell 21, and at least part of the inlet pipe 113 and the outlet pipe 114 pass through the first shell 21 to communicate with the external refrigerant pipe 11, so that the refrigerant in the external pipeline can be transported to the heat exchanger 1, and the refrigerant in the heat exchanger 1 can be transported to the heat exchanger 1. The refrigerant after heat exchange is transported to the external pipeline, and the second arc tube 112 is connected to the other end of the heat exchanger 1 and is located in the second shell 22. The first arc tube 111 and the second arc tube 112 can be constructed as U-shaped tubes for connecting two adjacent refrigerant flow channels 12, so as to realize the connection of multiple refrigerant flow channels 12 inside the heat exchanger 1. After the refrigerant flows in from the inlet pipe 113, it passes through multiple refrigerant flow channels 12 and then flows out from the outlet pipe 114, so as to realize the inflow and outflow of the refrigerant of the heat exchanger 1.

[0057] The exhaust port is provided at the second shell 22, and the refrigerant in the second shell 22 can be discharged from the exhaust port. That is, after the refrigerant leaks, it is discharged from the first shell 21 through the hose into the second shell 22, and then discharged through the exhaust port, thereby realizing the discharge of the leaked refrigerant.

[0058] In some embodiments, the indoor unit 100 also includes a shell 3, and the heat exchanger 1 is installed in the shell 3. The two ends of the heat exchanger 1 respectively define a first end space 31 and a second end space 32 with the shell 3. The first shell 21 is located in the first end space 31, and the second shell 22 is located in the second end space 32.

[0059] Specifically, the shell 3 is located outside the heat exchanger 1, and the inside of the shell 3 is used to install the heat exchanger 1, which can seal and protect the heat exchanger 1. For example, the heat exchanger 1 and the shell 3 are detachably connected to facilitate later disassembly and maintenance. Figure 1 As shown, the right end of the heat exchanger 1 and the shell 3 define a first end space 31, the first shell 21 is located in the first end space 31, and the first arc tube 111, the inlet pipe 113 and the outlet pipe 114 are located in the first end space 31, and the left end of the heat exchanger 1 and the shell 3 define a second end space 32, and the second shell 22 is located in the second end space 32, and the second arc tube 112 is located in the second end space 32, so that the heat exchanger 1 can be arranged in the shell 3.

[0060] In some embodiments, the shell 3 is provided with a drain pipe 33, the exhaust port is connected to an exhaust hose, the exhaust hose is communicated with the drain pipe 33, and the drain pipe 33 runs through the shell 3 and is suitable for extending to the outdoors.

[0061] Specifically, the shell 3 is provided with a drain pipe 33 for discharging the liquid water after heat exchange by the heat exchanger 1 to the outside. The exhaust port is provided on the second shell 22. The drain pipe 33 can be provided in the direction of the exhaust port, and the exhaust port is connected with an exhaust hose, which is connected to the drain pipe 33. In this way, when the leaked refrigerant is discharged to the exhaust port, it is discharged through the exhaust hose and the drain pipe 33, so that the leaked refrigerant can be discharged. The drain pipe 33 runs through the shell 3 and extends to the outside, so that the leaked refrigerant can be collected in a centralized manner. Among them, the drain pipe 33 is also provided as a hose, which has strong flexibility and can withstand high and low temperatures to increase the service life of the drain pipe 33. The drain pipe 33 generally connects the indoor unit 100 and the outdoor unit. The hose structure makes the installation of the drain pipe 33 more convenient.

[0062] Thus, by connecting the exhaust hose to the drain pipe 33 of the indoor unit 100, as shown in FIG. Figure 3 As shown, it is a flow diagram of the leaked refrigerant, that is, after the refrigerant leaks, the refrigerant is discharged into the drain pipe 33 along the exhaust hose to be discharged into the room.

[0063] The invention also provides an air conditioning system.

[0064] According to the air conditioning system of the present invention, it includes a controller, a compressor, an outdoor unit and an indoor unit 100 of any one of the above-mentioned embodiments, the compressor, the outdoor unit and the indoor unit 100 are connected in series to form a refrigerant circuit, a refrigerant sensor is provided in the exhaust space, the refrigerant sensor is electrically connected to the controller, and the controller is configured to execute a safety protection action after the refrigerant sensor reaches a set state.

[0065] Specifically, the air conditioning system can achieve cooling and heating of the air conditioning system through the cooperation between the controller, the compressor, the indoor unit 100 and the outdoor unit. During cooling, the low-temperature liquid refrigerant is evaporated into gas on the heat exchanger 1 of the indoor unit 100 to absorb heat, thereby cooling the indoor air. During heating, the air conditioning system operates in the opposite mode to that in the cooling state. The high-temperature and high-pressure refrigerant is cooled and releases heat on the heat exchanger 1 of the indoor unit 100, thereby heating the indoor air. The cooled refrigerant is returned to the outdoor unit for evaporation and heat absorption, and then compressed into high-temperature and high-pressure gas by the compressor and enters the indoor unit 100. Heating is achieved in this cycle.

[0066] Among them, the indoor unit 100 is located indoors, the outdoor unit is located outdoors and the compressor is connected to the outdoor unit. A refrigerant circuit can be formed by connecting the compressor, the outdoor unit and the indoor unit 100 in series through pipelines, and a refrigerant sensor is arranged in the exhaust space, and the refrigerant sensor is electrically connected to the controller, so that signal transmission between the refrigerant sensor and the controller can be realized. Specifically, after the refrigerant sensor detects that the concentration of the leaked refrigerant in the exhaust space reaches a set state, the signal is transmitted to the controller, and the controller executes a safety protection action to implement protection measures for the air-conditioning system.

[0067] In some embodiments, the set state of the air-conditioning system includes: when the detection value of the refrigerant sensor is greater than a first set concentration and lasts for a first set time, wherein the first set concentration is set to 10% LFL, LFL = 296g / m^3, the critical combustion value of R454B refrigerant has a volume ratio of: 11.25-22% (mass content 291-569.8g / m^3), and the first set time is 10S. That is to say, when the refrigerant sensor detects that the concentration of the leaked refrigerant reaches 10% LFL and lasts for 10S, a signal is transmitted to the controller to control the air-conditioning system to enter a safety protection mode.

[0068] And / or, the detection value of the refrigerant sensor is greater than the second set concentration, the second set concentration is greater than the first set concentration, wherein the second set concentration is set to 25% LFL, and 25% LFL>10% LFL, at this time, the refrigerant sensor transmits a signal to the controller to control the air-conditioning system to enter the safety protection mode.

[0069] And / or, the refrigerant sensor sends an alarm signal, and the controller receives the alarm signal and controls the air-conditioning system to enter a safety protection mode.

[0070] And / or, the refrigerant sensor fails or is disconnected for a second set time period, wherein the second set time period is set to 10S, that is, if the refrigerant sensor fails or is disconnected for 10S or more, the controller controls the air-conditioning system to enter the safety protection mode.

[0071] Therefore, by setting the refrigerant sensor to enter one of the above four states, the air-conditioning system enters the safety protection mode to protect the air-conditioning system and prompt the user to perform maintenance.

[0072] In some embodiments, the safety protection actions of the air conditioning system include: controlling the outdoor unit to shut down;

[0073] and / or, controlling the fan of the indoor unit 100 to run at a maximum wind speed when the indoor unit 100 is turned on;

[0074] and / or, when the indoor unit 100 is turned off, controlling the indoor unit 100 to turn on and run at a maximum speed in a third set time in an air supply mode, wherein the third set time is set to 10S;

[0075] and / or, controlling the air guide strip of the indoor unit 100 to open to a maximum angle;

[0076] and / or, controlling the indoor unit 100 to display a fault code;

[0077] And / or, the indoor unit 100 is controlled not to receive external control signals. Specifically, the indoor unit 100 does not receive functions such as power on / off, mode conversion, temperature adjustment, and air guide strip temperature adjustment of control devices such as remote controllers, wire controllers, and APPs. That is, when the air conditioning system is in the protection period, the user may confirm the problem by pressing buttons on the remote controller, wire controller, APP, etc. Therefore, the control signal during the protection period is not received to avoid greater damage caused by user misoperation;

[0078] And / or, the buzzer of the air-conditioning system is turned on for at least a fourth set time period, wherein the fourth set time period is set to 4 minutes, and after 4 minutes, the user eliminates the alarm by pressing any key on the remote control or line control, APP operation, etc.

[0079] Therefore, if Figure 4 In the logical judgment on the right side of the figure, that is, during the use of the air-conditioning system, when the refrigerant sensor encounters the above 4 situations, the air-conditioning system will perform the above 7 protection actions. In this way, the air-conditioning system can be shut down to avoid greater damage to the air-conditioning system due to refrigerant leakage and other reasons, and the user can be prompted to perform after-sales inspection and maintenance, thereby improving the safety of the use of the air-conditioning system.

[0080] 1. In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicating the orientation or position relationship are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore should not be understood as limiting the present invention.

[0081] 2. In the description of the present invention, "first feature" and "second feature" may include one or more of these features.

[0082] 3. In the description of the present invention, "plurality" means two or more.

[0083] 4. In the description of the present invention, a first feature “above” or “below” a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact via another feature therebetween.

[0084] 5. In the description of the present invention, “above”, “above” and “on” a first feature of a second feature includes the first feature being directly above and obliquely above the second feature, or simply means that the first feature is horizontally higher than the second feature.

[0085] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0086] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. An indoor unit, characterized in that: include: A heat exchanger, wherein a plurality of refrigerant flow channels are provided in the heat exchanger, and a refrigerant pipe communicating with the refrigerant flow channels is provided at the end of the heat exchanger; A sealing shell is connected to the end of the heat exchanger, the sealing shell cover is arranged outside the refrigerant pipe, the sealing shell and the end of the heat exchanger are sealed to define an exhaust space for accommodating the refrigerant pipe, and the exhaust space is connected to the exhaust port.

2. The indoor unit according to claim 1, characterized in that: The refrigerant pipe is provided at both ends of the heat exchanger, and the sealed shell includes a first shell and a second shell, the first shell and the second shell are respectively connected to the two ends of the heat exchanger and are respectively covered with corresponding refrigerant pipes, the first shell and the second shell are connected through a bypass pipe, and one of the first shell and the second shell is provided with the exhaust port.

3. The indoor unit according to claim 2, characterized in that: The bypass pipe is configured as a hose, one end of which is connected to the outer peripheral wall of the first shell and the other end of which is connected to the outer peripheral wall of the second shell, and a middle portion of the hose bypasses the heat exchanger.

4. The indoor unit according to claim 2, characterized in that: A refrigerant sensor is disposed in the first shell or the second shell.

5. The indoor unit according to claim 2, characterized in that: The refrigerant pipe includes a first arc-shaped pipe, a second arc-shaped pipe, an inlet pipe and an outlet pipe. The first arc-shaped pipe, the inlet pipe and the outlet pipe are located in the first shell, and the inlet pipe and the outlet pipe are both configured to at least partially extend from the first shell to communicate with an external refrigerant pipeline. The second arc-shaped pipe is located in the second shell. The first arc-shaped pipe and the second arc-shaped pipe are both used to connect two adjacent refrigerant flow channels. The exhaust port is provided in the second shell.

6. The indoor unit according to claim 2, characterized in that: It also includes a shell, the heat exchanger is installed in the shell, the two ends of the heat exchanger respectively define a first end space and a second end space with the shell, the first shell is located in the first end space, and the second shell is located in the second end space.

7. The indoor unit according to claim 6, characterized in that: The shell is provided with a drain pipe, the exhaust port is connected with an exhaust hose, the exhaust hose is communicated with the drain pipe, and the drain pipe runs through the shell and is suitable for extending to the outdoors.

8. An air conditioning system, characterized in that: It includes a controller, a compressor, an outdoor unit and an indoor unit as described in any one of claims 1-7, the compressor, the outdoor unit and the indoor unit are connected in series to form a refrigerant circuit, a refrigerant sensor is provided in the exhaust space, the refrigerant sensor is electrically connected to the controller, and the controller is configured to perform a safety protection action after the refrigerant sensor reaches a set state.

9. The air conditioning system according to claim 8, characterized in that: The set state includes: when the detection value of the refrigerant sensor is greater than a first set concentration and lasts for a first set time; And / or, the detection value of the refrigerant sensor is greater than a second set concentration, and the second set concentration is greater than the first set concentration; And / or, the refrigerant sensor sends an alarm signal; And / or, the refrigerant sensor fails or is disconnected for a second set time period.

10. The air conditioning system according to claim 8, characterized in that: The safety protection action includes: controlling the outdoor unit to shut down; and / or, controlling the fan of the indoor unit to run at a maximum wind speed when the indoor unit is turned on; and / or, when the indoor unit is off, controlling the indoor unit to be turned on and to run at a maximum speed in an air supply mode within a third set time period; and / or, controlling the air guide strip of the indoor unit to open to a maximum angle; and / or, controlling the indoor unit to display a fault code; and / or, controlling the indoor unit not to receive an external control signal; And / or, controlling a buzzer of the air-conditioning system to be turned on for at least a fourth set time period.

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