Indoor unit and air conditioning system

Abstract

The invention discloses an indoor unit and an air conditioning system. The indoor unit comprises an air duct module, a heat exchange space is formed in the air duct module, a heat exchanger is installed in the heat exchange space, a plurality of refrigerant flow channels are arranged in the heat exchanger, and a first refrigerant detection element is arranged in the heat exchange space; and the pipeline module is connected to the end of the air duct module, an installation space is formed in the pipeline module, the installation space is separated from the heat exchange space, a refrigerant pipe communicated with the refrigerant flow channel is arranged in the installation space, and a second refrigerant detection element is arranged in the installation space. According to the indoor unit, after the indoor unit is divided into the two spaces, each space is provided with one refrigerant sensor, control is carried out in combination with the refrigerant sensors, refrigerant leakage can be effectively detected, and the refrigerant protection action can be carried out in time.

Description

Technical Field

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

[0002] Generally, the refrigerant leakage concentration is detected by a refrigerant sensor. When a certain concentration is reached, the whole system starts the refrigerant protection logic to prevent the refrigerant from continuously leaking in a certain space.

[0003] However, the prior art cannot detect refrigerant leakage in all directions, cannot effectively detect refrigerant leakage and make timely refrigerant protection control. Summary of the invention

[0004] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, one purpose of the present invention is to provide an indoor unit, in which the pipe group side of the indoor unit is completely isolated from the air duct side, and the entire indoor unit is isolated into two spaces, each of which is provided with a refrigerant sensor, and the refrigerant sensor is combined to implement control, so that refrigerant leakage can be effectively detected and refrigerant protection action can be taken in time.

[0005] According to an embodiment of the present invention, the indoor unit includes: an air duct module, a heat exchange space is formed in the air duct module, a heat exchanger is installed in the heat exchange space, a plurality of refrigerant flow channels are provided in the heat exchanger, and a first refrigerant detection element is provided in the heat exchange space; a pipeline module, the pipeline module is connected to the end of the air duct module, an installation space is formed in the pipeline module, the installation space is separated from the heat exchange space, a refrigerant pipe connected to the refrigerant flow channel is provided in the installation space, and a second refrigerant detection element is provided in the installation space.

[0006] According to the indoor unit of the embodiment of the present invention, two different modules are separated, wherein the heat exchange space formed by the air duct module is used to install a heat exchanger, such as installing an evaporator, and a first refrigerant detection element is formed in the heat exchange space, and the first refrigerant detection element can detect whether there is a refrigerant leakage in the heat exchange space, and take corresponding safety protection actions after the leakage is found; in addition, the pipeline module also includes a second refrigerant detection element, which can be mainly used to detect refrigerant leakage in the pipeline module, and make corresponding logical control when the leakage is detected, so that the first refrigerant detection element and the second refrigerant detection element respectively make corresponding control in the two spaces of the isolated air duct module and the pipeline module, to deal with refrigerant leakage at different positions, can effectively detect refrigerant leakage at different positions and can take refrigerant protection actions in time to prevent the internal structure of the entire air-conditioning system from malfunctioning.

[0007] According to the indoor unit of the embodiment of the present invention, a partition is provided at the end of the air duct module, the partition separates the heat exchange space from the installation space, and the refrigerant pipe passes through the partition.

[0008] According to an embodiment of the present invention, the indoor unit further includes: a control module, the first refrigerant detection element and the second refrigerant detection element are both electrically connected to the control module, and the control module performs a safety action when the refrigerant concentration detected by at least one of the first refrigerant detection element and the second refrigerant detection element is greater than a set value.

[0009] According to the indoor unit of an embodiment of the present invention, the heat exchange space includes an air outlet opened on the air duct module, the air outlet is provided with an air guide bar, the air guide bar is connected to a first driving member, and the control module controls the first driving member to drive the air guide bar to close the air outlet when the first refrigerant detection element detects that the refrigerant concentration is greater than a set value.

[0010] According to the indoor unit of the embodiment of the present invention, the first refrigerant detection element is disposed at the air outlet.

[0011] According to the indoor unit of an embodiment of the present invention, the first refrigerant detection element is located at one end of the air outlet, and the air outlet is provided with a plurality of louvers distributed and spaced apart along the length direction; wherein, when the control module determines that there is a refrigerant leakage in the heat exchange space, the control module controls the louvers at one end of the air outlet to guide air toward the first refrigerant detection element, and controls the louvers at the middle and the other end of the air outlet to be closed.

[0012] According to the indoor unit of an embodiment of the present invention, a driving wind wheel is further provided in the heat exchange space, the driving wind wheel is connected to a second driving member, and the control module controls the second driving member to operate at a safe frequency when the first refrigerant detection element detects that the refrigerant concentration is greater than a set value.

[0013] According to the indoor unit of an embodiment of the present invention, the piping module is provided with an air outlet connected to the installation space, and a fresh air fan is provided in the installation space, and the control module controls the fresh air fan to supply air toward the air outlet when the second refrigerant detection element detects that the refrigerant concentration is greater than a set value.

[0014] According to the indoor unit of an embodiment of the present invention, the refrigerant pipe includes a first arc-shaped pipe, an inlet pipe and an outlet pipe; the first arc-shaped pipe, the inlet pipe and the outlet pipe are all located in the pipeline module, the first arc-shaped pipe is used to connect two adjacent refrigerant flow channels, and the inlet pipe and the outlet pipe are used to connect with an external refrigerant pipeline.

[0015] An embodiment of the present invention also discloses an air-conditioning system, including a controller, a compressor, an outdoor unit and the above-mentioned indoor unit, the refrigerant pipeline of the compressor and the refrigerant pipeline of the outdoor unit are connected to the refrigerant flow channel of the indoor unit to form a refrigerant flow path, the compressor, the first refrigerant detection element and the second refrigerant detection element are all electrically connected to the controller, and the controller is configured to control the compressor to stop running when the refrigerant leakage concentration is greater than a set value and continues for a set time.

[0016] According to the air conditioning system of the embodiment of the present invention, in the entire system of the entire air conditioning operation, if it is detected that the refrigerant leakage concentration is greater than the set value, the system will eventually stop after recovering the refrigerant in the outdoor refrigeration mode to prevent continuous leakage of the refrigerant.

[0017] 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

[0018] 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:

[0019] Figure 1 is a simple schematic diagram of an air conditioning system according to an embodiment of the present invention;

[0020] Figure 2 is a flow chart of the control logic of the indoor unit of an embodiment of the present invention;

[0021] Figure 3 is a schematic diagram of the internal structure of an indoor unit according to an embodiment of the present invention;

[0022] Figure 4 is a partial schematic diagram of an indoor unit according to an embodiment of the present invention;

[0023] Reference numerals:

[0024] Compressor 1, four-way valve 2, outdoor heat exchanger 3, throttling device 4,

[0025] Indoor heat exchanger 5, second refrigerant detection element 51, first refrigerant detection element 52, fresh air module 53,

[0026] Evaporator 54 , partition 55 , heat exchange space 56 , installation space 57 , first arc tube 571 , inlet pipe 572 , outlet pipe 573 , air guide strip 58 , louver 59 . DETAILED DESCRIPTION

[0027] 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.

[0028] Reference below Figure 1-Figure 4 Describe the indoor unit according to an embodiment of the present invention, the first refrigerant detection element 52 and the second refrigerant detection element 51 respectively make corresponding controls in the two spaces of the isolated air duct module and the pipe module, and can deal with refrigerant leakage at different positions. It can effectively detect refrigerant leakage at different positions and can take refrigerant protection action in time to prevent the internal structure of the entire air-conditioning system from malfunctioning.

[0029] like Figure 1-Figure 4 As shown, the indoor unit according to the embodiment of the present invention includes: an air duct module and a pipe module.

[0030] Among them, a heat exchange space 56 is formed in the air duct module, a heat exchanger is installed in the heat exchange space 56, a plurality of refrigerant flow channels are arranged in the heat exchanger, and a first refrigerant detection element 52 is arranged in the heat exchange space 56; the pipeline module is connected to the end of the air duct module, and an installation space 57 is formed in the pipeline module, the installation space 57 is separated from the heat exchange space 56, a refrigerant pipe connected to the refrigerant flow channel is arranged in the installation space 57, and a second refrigerant detection element 51 is arranged in the installation space 57 (not shown in the internal structure diagram, see Figure 1 ).

[0031] In practice, the air duct module includes a heat exchange space 56, in which a heat exchanger, such as an evaporator 54, is installed. After the evaporator 54 is installed, heat is exchanged between the evaporator 54 and the structure outside the indoor unit. The air duct module includes a plurality of refrigerant flow channels, which are connected to each other and form a refrigerant flow path in the air duct module. After the refrigerant is input into the indoor unit from the outside, the contact area between the refrigerant and the air inside the air duct module can be increased through the plurality of refrigerant flow channels in the indoor unit, thereby increasing the heat exchange efficiency between the refrigerant and the air duct module.

[0032] Specifically, the air duct module is separated from the pipeline module. At this time, the indoor unit is mainly divided into two modules, and both modules have a refrigerant flow path. A first refrigerant detection element 52 is provided in the air duct module. At this time, if a refrigerant leak occurs in the refrigerant flow channel in the air duct module, it can be detected by the first refrigerant detection element 52, and a corresponding safety control action is taken after the detection, and the refrigerant leaked in the air duct module is discharged and recovered. In addition, a second refrigerant detection element 51 is provided in the pipeline module, wherein the pipeline module is connected to the refrigerant flow channel of the air duct module, and the second refrigerant detection element 51 can detect whether there is a refrigerant leak in the pipeline module, and perform a corresponding safety control action for the refrigerant leak in the pipeline module, wherein the first refrigerant detection element 52 and the second refrigerant detection element 51 are both refrigerant sensors.

[0033] Therefore, the embodiment of the present invention enables the first refrigerant detection element 52 to detect refrigerant leakage in the air duct module, and the second refrigerant detection element 51 to detect refrigerant leakage in the pipeline module. It can perform corresponding detections in the two mutually separated spaces of the air duct module and the pipeline module, and make corresponding controls. It can respond to refrigerant leakage at different locations in a timely manner, effectively detect refrigerant leakage at different locations and take refrigerant protection actions in a timely manner to prevent the internal structure of the entire air-conditioning system from being damaged due to refrigerant leakage.

[0034] In some embodiments, a partition 55 is provided at the end of the air duct module, the partition 55 separates the heat exchange space 56 from the installation space 57 , and the refrigerant pipe passes through the partition 55 .

[0035] In practice, the partition 55 mainly separates the pipeline module from the part of the air duct module having the heat exchanger and the refrigerant flow channel. Multiple refrigerant pipes pass through the partition 55 to connect the refrigerant flow channels in the heat exchange space 56. At the same time, the partition 55 can also allow the refrigerant pipes to pass through and connect and support the refrigerant pipes.

[0036] In addition, the area of ​​the partition 55 is larger than the area of ​​the two end surfaces of the heat exchanger shell. The two ends refer to the two ends along the length direction of the heat exchanger, which can completely block the space inside the heat exchanger. In addition, the heat exchange space 56 and the installation space 57 can be better separated, so that when a refrigerant leak occurs in one of the heat exchange spaces 56 or the installation space 57, such as at the partition 55 and at the position of the pipeline module, if a refrigerant leak occurs, it can be detected by the second refrigerant detection element 51, thereby enhancing the timeliness of the refrigerant detection and being able to discharge the refrigerant in time. If a refrigerant leak occurs in the other heat exchange space 56, the refrigerant is detected by the first refrigerant detection element 52 to take safety actions.

[0037] The embodiment of the present invention separates the heat exchange space 56 and the installation space 57 as much as possible by setting a partition 55. Even if refrigerant leakage occurs in the heat exchange space 56, a part of the refrigerant will flow to the pipeline module through the refrigerant flow channel. However, if a large part of the leakage is still located in the heat exchange space 56, it can be detected by the first refrigerant detection element 52. If more of the leakage flows to the pipeline module, it can be detected by the second refrigerant detection element 51. The embodiment of the present invention can cope with refrigerant leakage at different positions, can effectively detect refrigerant leakage at different positions and can take refrigerant protection action in time to prevent the internal structure of the entire air-conditioning system from malfunctioning.

[0038] In some embodiments, it also includes: a control module, the first refrigerant detection element 52 and the second refrigerant detection element 51 are both electrically connected to the control module, and the control module performs a safety action when the refrigerant concentration detected by at least one of the first refrigerant detection element 52 and the second refrigerant detection element 51 is greater than a set value.

[0039] In practice, the control module serves as the main control center of the air conditioner, and may generally include multiple sub-modules such as a motor control module, a fan control module, a power management module, a temperature and humidity control module, a filter module, and an intelligent control module.

[0040] If the first refrigerant detection element 52 detects the refrigerant leakage concentration and transmits it to the intelligent control module, the intelligent control module analyzes and determines the leakage concentration of the heat exchange space 56, and then controls the discharge of the leaked refrigerant or other safety actions; similarly, if the second refrigerant detection element 51 detects the refrigerant leakage concentration in the installation space 57 and transmits it to the intelligent control module, the intelligent control module analyzes and processes the refrigerant leakage concentration and performs the next step of discharging the refrigerant or other safety actions; of course, when both the first refrigerant detection element 52 and the second refrigerant detection element 51 detect that the refrigerant leakage concentration is greater than the set value, the intelligent control module controls both the discharge of the refrigerant in the installation space 57 and the discharge of the refrigerant in the heat exchange space 56.

[0041] In some embodiments, the heat exchange space 56 includes an air outlet opened on the air duct module, the air outlet is provided with an air guide strip 58, the air guide strip 58 is connected to a first driving member, and the control module controls the first driving member to drive the air guide strip 58 to close the air outlet when the first refrigerant detection element 52 detects that the refrigerant concentration is greater than a set value.

[0042] Specifically, both ends of the air guide strip 58 are connected to the first driving member through a rotating shaft, and when the first driving member rotates, the air guide strip 58 can rotate. When the indoor unit of the air conditioner is turned on, the refrigerant leakage judgment procedure is entered. At this time, the air guide strip 58 rotates to an upward position, so that the air outlet is in an open state. When the first refrigerant detection element 52 detects that the refrigerant concentration is greater than a set value, the first driving member is controlled to drive the air guide strip 58, so that the air guide strip 58 changes from an open outlet state to a closed outlet state. In this way, the continued leakage of the refrigerant can be reduced, and the refrigerant can be prevented from entering the indoor air and reaching a certain concentration, which affects the quality of the indoor air, thereby affecting people's health. At the same time, the refrigerant can also be effectively recovered to the outdoor unit.

[0043] In some embodiments, the first refrigerant detection element 52 is disposed at the air outlet.

[0044] In practice, the first refrigerant detection element 52 is set at the air outlet, so the refrigerant leaked at any position in the heat exchange space 56 will inevitably pass through the air outlet during the operation of the indoor unit. The air outlet can better detect the refrigerant leakage at different positions of the heat exchange space 56. Otherwise, due to the uncertainty of the refrigerant leakage position, if the first refrigerant detection element 52 is set at other positions in the heat exchange space 56, then if a leakage occurs downstream of the first refrigerant detection element 52, it will be difficult to detect the refrigerant leakage.

[0045] Therefore, by disposing the first refrigerant detection element 52 at the air outlet, it is easier to detect refrigerant leakage generated in the heat exchange space 56 in the air duct module.

[0046] In some embodiments, the first refrigerant detection element 52 is located at one end of the air outlet, and a plurality of louvers 59 spaced apart and distributed along the length direction are provided at the air outlet; wherein, when the control module determines that there is a refrigerant leakage in the heat exchange space 56, the control module controls the louvers 59 at one end of the air outlet to guide air toward the first refrigerant detection element 52, and controls the louvers 59 at the middle and the other end of the air outlet to be closed.

[0047] That is to say, the multiple louvers 59 at the air outlet are spaced apart along the length direction of the air outlet, and when the operation of detecting refrigerant leakage begins, the louvers 59 at the end of the air outlet away from the first refrigerant detection element 52 and the louvers 59 in the middle position are kept vertical to the air outlet, that is, the airflow can be directed to the end close to the first refrigerant detection element 52 through the louvers 59 at the left end of the air outlet and the louvers 59 in the middle. At this time, when the airflow flows to the first refrigerant detection element 52, it can ensure that the first refrigerant detection element 52 can detect the refrigerant leakage more accurately.

[0048] Then, when the refrigerant leaks, at the initial stage, when the concentration is difficult to reach the set requirement, directing the airflow to the position of the first refrigerant detection element 52 can better detect the actual situation of the refrigerant, so that when the refrigerant leakage reaches the set value, the refrigerant can be driven to be discharged and the outdoor unit can recover the refrigerant.

[0049] In some embodiments, a driving wind wheel is further provided in the heat exchange space 56 , and the driving wind wheel is connected to a second driving component. When the first refrigerant detection element 52 detects that the refrigerant concentration is greater than a set value, the control module controls the second driving component to operate at a safe frequency.

[0050] In practice, the second driving member can be an axial flow motor, and the driving wind wheel is generally a cross-flow wind wheel. When the axial flow motor rotates, it drives the cross-flow wind wheel to rotate, so that the cross-flow wind wheel brings the cold air in the indoor unit into the indoor space. When the first refrigerant detection element 52 detects that the refrigerant concentration is greater than the set value, the control module controls the rotation of the second driving member to change the speed or frequency of the cross-flow wind wheel driven by the second driving member. Then, at this time, when the air guide strip 58 is closed, the rotation frequency of the axial flow motor changes and can be turned into a breeze to prepare for the recovery of the leaked refrigerant.

[0051] In some embodiments, the pipeline module is provided with an air outlet connected to the installation space 57, and a fresh air fan is provided in the installation space 57. When the second refrigerant detection element 51 detects that the refrigerant concentration is greater than a set value, the control module controls the fresh air fan to supply air toward the air outlet.

[0052] Specifically, the fresh air fan and the fresh air outlet constitute a fresh air module 53. The air outlet is arranged on one side of the pipeline module, and the air outlet can be connected to the outdoor unit. The fresh air fan arranged in the installation space 57 can blow air toward the air outlet. When the second refrigerant detection element 51 detects that the refrigerant concentration is greater than the set value, the control module controls the operation of the fresh air fan so that the fresh air fan blows air toward the air outlet, so that the leaked refrigerant is blown out of the outdoor unit through the air outlet, which is convenient for recovering the leaked refrigerant and also allows the refrigerant leaked from the indoor unit to be better discharged.

[0053] Under normal circumstances, the fresh air fan rotates forward to allow the outside air flow to enter the indoor unit. When the leaked refrigerant needs to be discharged from the indoor unit, the motor shaft of the fresh air fan can be reversed to discharge the leaked refrigerant.

[0054] In some embodiments, the refrigerant pipe includes a first arc-shaped pipe 571, an inlet pipe 572 and an outlet pipe 573; the first arc-shaped pipe 571, the inlet pipe 572 and the outlet pipe 573 are all located in the pipeline module, the first arc-shaped pipe 571 is used to connect two adjacent refrigerant flow channels, and the inlet pipe 572 and the outlet pipe 573 are used to connect with the external refrigerant pipeline.

[0055] Among them, one end of the inlet pipe 572 is connected to the outdoor unit, and the other end is connected to the refrigerant flow channel in the indoor unit. If there are multiple refrigerant flow channels inside the indoor unit, then the two adjacent refrigerant flow channels are connected through the first arc pipe 571 at the end close to the pipeline module. Multiple first arc pipes 571 can connect multiple refrigerant flow channels in the indoor unit. Of course, adjacent refrigerant flow channels can also be connected through a second arc pipe (not shown in the figure) at the end away from the pipeline module, which makes the refrigerant flow channel of the indoor unit present an S-shaped structure distribution, and the outlet of the S-shaped structure is also the outlet of the outlet pipe 573. The outlet pipe 573 is connected to one end of the outdoor unit and the inlet pipe 572 is connected to the other end of the outdoor unit, so that a complete pipeline circulation can be formed between the outdoor unit and the indoor unit.

[0056] An embodiment of the present invention also discloses an air-conditioning system, including a controller, a compressor 1, an outdoor unit and the above-mentioned indoor unit. The refrigerant pipeline of the compressor 1 and the refrigerant pipeline of the outdoor unit are connected to the refrigerant flow channel of the indoor unit to form a refrigerant flow path. The compressor 1, the first refrigerant detection element 52 and the second refrigerant detection element 51 are all electrically connected to the controller. The controller is configured to control the compressor 1 to stop running when the refrigerant leakage concentration is greater than a set value and lasts for a set time.

[0057] Among them, refer to Figure 1 As shown, the indoor unit includes an indoor heat exchanger 5, the outdoor unit includes a compressor 1 and an outdoor heat exchanger 3, the controller is electrically connected to the indoor heat exchanger 5 and the compressor 1 in the outdoor unit, the outdoor heat exchanger 3 and the throttling device 4 therebetween or other structures such as a four-way valve 2, and circulation is achieved between the indoor heat exchanger 5 and the compressor 1 in the outdoor unit and the outdoor heat exchanger 3.

[0058] At the beginning, when the first refrigerant detection element 52 and the second refrigerant detection element 51 detect that the leakage of refrigerant reaches a set value, the control module controls the refrigerant of the indoor unit to be discharged to the compressor 1 of the outdoor unit, so that the compressor 1 of the outdoor unit recovers the refrigerant. When the leaked refrigerant is discharged toward the outdoor unit for a set period of time, most of the leaked refrigerant can be recovered. At this time, turning off the compressor can prevent continuous leakage of the refrigerant.

[0059] 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 indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0060] In the description of the present invention, "first feature" or "second feature" may include one or more of the features.

[0061] In the description of the present invention, "plurality" means two or more.

[0062] In the description of the present invention, a first feature being “on” or “under” a second feature may include that the first and second features are directly in contact with each other, or may include that the first and second features are not in direct contact with each other but are in contact with each other via another feature therebetween.

[0063] In the description of the present invention, “on”, “over” and “above” a first feature from 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.

[0064] 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.

[0065] 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.

[0066] 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.

[0067] 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: An air duct module, wherein a heat exchange space is formed in the air duct module, a heat exchanger is installed in the heat exchange space, a plurality of refrigerant flow channels are arranged in the heat exchanger, and a first refrigerant detection element is arranged in the heat exchange space; A pipeline module is connected to the end of the air duct module, an installation space is formed in the pipeline module, the installation space is separated from the heat exchange space, a refrigerant pipe connected to the refrigerant flow channel is provided in the installation space, and a second refrigerant detection element is provided in the installation space.

2. The indoor unit according to claim 1, characterized in that: A partition is provided at the end of the air duct module, the partition separates the heat exchange space from the installation space, and the refrigerant pipe passes through the partition.

3. The indoor unit according to claim 1 or 2, characterized in that: Also includes: The control module, the first refrigerant detection element and the second refrigerant detection element are both electrically connected to the control module, and the control module performs a safety action when the refrigerant concentration detected by at least one of the first refrigerant detection element and the second refrigerant detection element is greater than a set value.

4. The indoor unit according to claim 3, characterized in that: The heat exchange space includes an air outlet opened on the air duct module, the air outlet is provided with an air guide strip, the air guide strip is connected to a first driving member, and the control module controls the first driving member to drive the air guide strip to close the air outlet when the first refrigerant detection element detects that the refrigerant concentration is greater than a set value.

5. The indoor unit according to claim 4, characterized in that: The first refrigerant detection element is arranged at the air outlet.

6. The indoor unit according to claim 5, characterized in that: The first refrigerant detection element is located at one end of the air outlet, and the air outlet is provided with a plurality of louvers spaced apart and distributed along the length direction; When determining that there is refrigerant leakage in the heat exchange space, the control module controls the shutters at one end of the air outlet to guide air toward the first refrigerant detection element, and controls the shutters at the middle and the other end of the air outlet to be closed.

7. The indoor unit according to claim 3, characterized in that: A driving wind wheel is also provided in the heat exchange space, and the driving wind wheel is connected to a second driving component. When the first refrigerant detection element detects that the refrigerant concentration is greater than a set value, the control module controls the second driving component to operate at a safe frequency.

8. The indoor unit according to claim 3, characterized in that: The pipeline module is provided with an air outlet connected to the installation space, and a fresh air fan is provided in the installation space. When the second refrigerant detection element detects that the refrigerant concentration is greater than a set value, the control module controls the fresh air fan to supply air toward the air outlet.

9. The indoor unit according to claim 1, characterized in that: The refrigerant pipe comprises a first arc-shaped pipe, an inlet pipe and an outlet pipe; The first arc-shaped tube, the inlet tube and the outlet tube are all located in the pipeline module. The first arc-shaped tube is used to connect two adjacent refrigerant flow channels, and the inlet tube and the outlet tube are used to connect with an external refrigerant pipeline.

10. An air conditioning system, characterized in that: It includes a controller, a compressor, an outdoor unit and the indoor unit according to any one of claims 1 to 9, the refrigerant pipeline of the compressor and the refrigerant pipeline of the outdoor unit are connected to the refrigerant flow channel of the indoor unit to form a refrigerant flow path, the compressor, the first refrigerant detection element and the second refrigerant detection element are all electrically connected to the controller, and the controller is configured to control the compressor to stop running when the refrigerant leakage concentration is greater than a set value and continues for a set time.

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