Air conditioning system and multi-split air conditioner

Abstract

The invention relates to the technical field of air conditioners, particularly provides an air conditioning system and a multi-split air conditioner, and aims to solve the problems that the operation capacity of a multi-split air conditioning system is remarkably attenuated, the energy efficiency is reduced and the stability is insufficient. Therefore, the air conditioning system comprises a first indoor unit module, an outdoor unit module and a range extending module, the range extending module is detachably arranged between the first indoor unit module and the outdoor unit module, and the outdoor unit module is connected with a heat exchanger of the range extending module to form a first unit; the first unit can conduct outdoor heating operation and / or outdoor refrigerating operation, the first indoor unit module and the range extending module are connected to form a second unit, the second unit can conduct indoor heating operation and / or indoor refrigerating operation, and when the first unit and the second unit conduct refrigerating or heating operation at the same time, the first unit and the second unit conduct indoor heating operation and / or indoor refrigerating operation. The first unit can transfer cold or heat to the refrigerant in the second unit through the heat exchanger. By means of the range extending module, the refrigerating and heating effects and flexibility of the air conditioning system can be improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of air conditioning, and specifically provides an air conditioning system and a multi-connected air conditioner. BACKGROUND

[0002] As a common form of air conditioning system, the multi-connected system has been widely used in commercial and residential buildings. At present, the existing multi-connected system is mainly composed of an outdoor unit and an indoor unit, and the two are connected through pipelines. Among them, the outdoor unit can be connected with several indoor units in a single or multi-parallel manner. However, the system has many limitations in practical application.

[0003] On the one hand, the system capacity and the length of the pipeline of the existing multi-connected system are obviously limited. In the prior art, when the length of the pipeline exceeds the standard value (usually 80-100 meters), the flow resistance of the refrigerant increases exponentially, causing problems such as pressure loss, oil return difficulty, and uneven distribution of refrigerant, resulting in large attenuation of the unit refrigeration / heating capacity and significant decline in energy efficiency ratio (EER), which is difficult to meet the needs of large buildings or complex pipeline scenarios.

[0004] On the other hand, the performance of the multi-connected system in extreme climates is increasingly highlighted. In the low-temperature heating condition, the traditional compressor causes excessive attenuation of the heating capacity due to the limitation of the pressure ratio, and there is a risk of frequent start-stop; in the high-temperature refrigeration, the condensing pressure is too high to trigger the protection mechanism, and the system stability decreases. The existing technology increases the displacement of the compressor or uses auxiliary electric heating to compensate, but such solutions sacrifice energy efficiency and cannot solve the problem of capacity attenuation from the root.

[0005] Therefore, there is a need in the art for a new technical solution to solve the above problems. SUMMARY

[0006] The present application aims to solve the above technical problems, i.e., to solve the problems of significant attenuation of the operating capacity, decline in energy efficiency, and insufficient stability of the existing multi-connected air conditioning system.

[0007] In a first aspect, the present application provides an air conditioning system, comprising a first indoor unit module, an outdoor unit module, and a range-extending module, the range-extending module being detachably arranged between the first indoor unit module and the outdoor unit module, the outdoor unit module being connected with a heat exchanger of the range-extending module to form a first unit, the first unit being capable of outdoor heating operation and / or outdoor refrigeration operation, the first indoor unit module being connected with the range-extending module to form a second unit, the second unit being capable of indoor heating operation and / or indoor refrigeration operation, and when the first unit and the second unit operate simultaneously for refrigeration or heating, the first unit is capable of transferring cold or heat to the refrigerant in the second unit through the heat exchanger.

[0008] In the preferred technical scheme of the air conditioning system, the first indoor unit module is provided in plurality, and the plurality of first indoor unit modules are connected in parallel with the range extending module.

[0009] In the preferred technical scheme of the air conditioning system, the range extending module and the first indoor unit module are provided in plurality, each range extending module is connected with at least one first indoor unit module, and the plurality of range extending modules are connected in parallel with the outdoor unit module.

[0010] In the preferred technical scheme of the air conditioning system, the range extending module comprises a first compressor, a first four-way valve, a first expansion valve and the heat exchanger, the exhaust pipe of the first compressor is connected with the d port of the first four-way valve, the air inlet of the first compressor is connected with the s port of the first four-way valve, the first indoor unit module and the heat exchanger are connected with the e port and the c port of the first four-way valve respectively, and the first expansion valve is connected between the first indoor unit module and the heat exchanger.

[0011] In the preferred technical scheme of the air conditioning system, the range extending module further comprises a first oil separator and a first gas-liquid separator, the exhaust pipe of the first compressor is connected with the d port of the first four-way valve after passing through the first oil separator, and the air inlet of the first compressor is connected with the s port of the first four-way valve after passing through the first gas-liquid separator.

[0012] In the preferred technical scheme of the air conditioning system, the outdoor unit module comprises a second compressor, a second four-way valve, a second expansion valve and an outdoor heat exchanger, the exhaust pipe of the second compressor is connected with the d port of the second four-way valve, the air inlet of the second compressor is connected with the s port of the second four-way valve, the heat exchanger and the outdoor heat exchanger are connected with the e port and the c port of the second four-way valve respectively, and the second expansion valve is connected between the heat exchanger and the outdoor heat exchanger.

[0013] In the preferred technical scheme of the air conditioning system, the outdoor unit module further comprises a second oil separator and a second gas-liquid separator, the exhaust pipe of the second compressor is connected with the d port of the second four-way valve after passing through the second oil separator, and the air inlet of the second compressor is connected with the s port of the second four-way valve after passing through the second gas-liquid separator.

[0014] In the preferred technical scheme of the air conditioning system, the air conditioning system further comprises a plurality of second indoor unit modules, the plurality of second indoor unit modules are connected in parallel with the range extending module and connected with the outdoor unit module to form a third unit, and the third unit can perform indoor heating operation and / or indoor refrigeration operation.

[0015] In the preferred technical solution of the air conditioning system, the first indoor unit module comprises a first indoor heat exchanger, and the two sides of the first indoor heat exchanger are connected with the cooling liquid inlet pipe and the cooling liquid outlet pipe of the range extender module respectively, and / or

[0016] The second indoor unit module comprises a second indoor heat exchanger, and the two sides of the second indoor heat exchanger are connected with the cooling liquid inlet pipe and the cooling liquid outlet pipe of the outdoor unit module respectively.

[0017] In a second aspect, the present application further provides a multi-split air conditioner, which comprises the air conditioning system according to any one of the above.

[0018] As can be understood by those skilled in the art, the technical solution of the present application provides an air conditioning system, which comprises a first indoor unit module, an outdoor unit module and a range extender module, the range extender module is detachably arranged between the first indoor unit module and the outdoor unit module, the outdoor unit module is connected with the heat exchanger of the range extender module to form a first unit, the first unit is capable of outdoor heating operation and / or outdoor refrigeration operation, the first indoor unit module is connected with the range extender module to form a second unit, the second unit is capable of indoor heating operation and / or indoor refrigeration operation, and when the first unit and the second unit simultaneously refrigerate or heat, the first unit is capable of transferring cold or heat to the refrigerant in the second unit through the heat exchanger. In the case of using the above technical solution, the present application can effectively improve the operation capacity of the air conditioning system and ensure the stability of refrigeration or heating. Specifically, by arranging the range extender module, the present application realizes twice heat exchange (outdoor→range extender module→indoor), disperses the temperature difference pressure of the traditional single-stage heat pump, and avoids the sudden drop of the compressor efficiency under extreme temperature. In heating, the range extender module acts as a "thermal energy amplifier", so that the refrigerant at a higher temperature is delivered to the indoor unit module to release more heat to the indoor environment, thereby improving the heating effect of the indoor environment; in refrigeration, it acts as a "cold energy intensifier", so that the refrigerant at a lower temperature is delivered to the indoor unit module to absorb more heat from the indoor environment, thereby improving the refrigeration effect of the indoor environment. In addition, the range extender module is arranged to be detachable, which gives the air conditioning system high adaptability and flexibility, so that users can increase the range extender module in the existing system at any time according to actual needs, without the need for large-scale modification of the entire air conditioning system, thereby saving costs and improving the expansibility and practicality of the system.

[0019] Further, the first indoor unit module is provided in plurality, and the plurality of first indoor unit modules are connected with the range extender module in parallel. Through this arrangement, the air conditioning system can provide refrigeration or heating services for multiple different indoor areas at the same time, realizing individual temperature control of multiple areas.

[0020] Furthermore, the present invention provides multiple range extender modules and multiple first indoor unit modules. Each range extender module is connected to at least one first indoor unit module, and multiple range extender modules are connected in parallel to the outdoor unit module. This arrangement can meet cooling or heating needs in different scenarios, expanding the coverage of the air conditioning system.

[0021] Furthermore, the air conditioning system includes multiple second indoor unit modules. These modules are connected in parallel with the range extender module and then connected to the outdoor unit module to form a third unit. The third unit can perform indoor heating and / or indoor cooling operations. This configuration expands the use scenarios of the air conditioning system of the present invention, meeting the cooling or heating requirements in different scenarios, and further expanding the coverage of the air conditioning system. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The preferred embodiments of the present invention are described below with reference to the accompanying drawings, in which:

[0023] Figure 1 This is a schematic diagram of the structure of the air conditioning system of the present invention. Figure 1 ;

[0024] Figure 2 This is a schematic diagram of the structure of the air conditioning system of the present invention. Figure 2 ;

[0025] Figure 3 This is a schematic diagram of the structure of the air conditioning system of the present invention. Figure 3 ;

[0026] Figure 4 This is a schematic diagram of the structure of the air conditioning system of the present invention. Figure 4 .

[0027] List of reference numerals:

[0028] 1. First indoor unit module; 11. First indoor heat exchanger;

[0029] 2. Outdoor unit module; 21. Second compressor; 22. Second four-way valve; 23. Second expansion valve; 24. Outdoor heat exchanger; 25. Second oil separator; 26. Second gas-liquid separator;

[0030] 3. Range extender module; 31. First compressor; 32. First four-way valve; 33. First expansion valve; 34. Heat exchanger; 35. First oil separator; 36. First gas-liquid separator;

[0031] 4. Second indoor unit module; 41. Second indoor heat exchanger. DETAILED DESCRIPTION

[0032] The preferred embodiments of the present application will be described below with reference to the accompanying drawings. Those skilled in the art will appreciate that the embodiments are only used to explain the technical principles of the present application, and are not intended to limit the protection scope of the present application. For example, although the embodiments below are described in conjunction with a multi-split air conditioning system, the air conditioning system provided by the present application is also applicable to other products that need to solve the problems of significant reduction in operating capacity, energy efficiency and insufficient stability.

[0033] It should be noted that in the description of the present application, unless otherwise explicitly specified and limited, the terms "arranged", "connected" should be understood broadly, for example, it can be fixedly connected, or detachably connected, or integrally connected. Those skilled in the art can understand the specific meaning of the above terms in the present application according to the specific circumstances.

[0034] Based on the problems of significant reduction in operating capacity, energy efficiency and insufficient stability of the existing multi-split air conditioning system as pointed out in the background art, the present application provides an air conditioning system, which aims to effectively solve the problems of significant reduction in operating capacity, energy efficiency and insufficient stability of the multi-split air conditioning system by arranging a range-extending module.

[0035] As shown in Figure 1 The present application provides an air conditioning system, which comprises a first indoor unit module 1, an outdoor unit module 2 and a range-extending module 3. The range-extending module 3 is detachably arranged between the first indoor unit module 1 and the outdoor unit module 2. The outdoor unit module 2 is connected with the heat exchanger 34 of the range-extending module 3 to form a first unit group, which is capable of outdoor heating operation and / or outdoor refrigeration operation. The first indoor unit module 1 is connected with the range-extending module 3 to form a second unit group, which is capable of indoor heating operation and / or indoor refrigeration operation. When the first unit group and the second unit group simultaneously perform refrigeration or heating operation, the first unit group can transfer cold or heat to the refrigerant in the second unit group through the heat exchanger 34.

[0036] The first unit group in the present application is composed of the outdoor unit module 2 and the heat exchanger 34 of the range-extending module 3, which is responsible for extracting heat or cold from the outdoor environment (low temperature / high temperature). The second unit group is formed by connecting the first indoor unit module 1 with the range-extending module 3, which is responsible for delivering the processed heat / cold to the indoor environment. The range-extending module 3 serves as an intermediate heat energy conversion hub, and realizes the stepwise temperature increase or decrease of the refrigerant through the heat exchanger 34.

[0037] In low-temperature heating, the first unit absorbs heat from the outdoor low-temperature environment through outdoor heating operation, and the heat is transferred to the refrigerant of the second unit through the heat exchanger 34, so that the temperature of the refrigerant is increased, and the range-extending module 3 further compresses or heats (such as through electric auxiliary heating) the refrigerant to increase the temperature to the indoor heating demand. The high-temperature refrigerant releases heat through the indoor unit module to achieve efficient heating of the indoor environment.

[0038] In high-temperature refrigeration, the first unit releases heat to the outdoor high-temperature environment through outdoor refrigeration operation, and the cold energy is transferred to the refrigerant of the second unit through the heat exchanger 34, so that the refrigerant entering the indoor unit module can absorb more cold energy, and the refrigeration effect on the indoor environment is strengthened.

[0039] The present application disperses the temperature difference pressure of the traditional single-stage heat pump through two heat exchanges (outdoor -> range-extending module 3 -> indoor), avoids the sudden drop in compressor efficiency at extreme temperatures. In heating, the range-extending module 3 acts as a "heat amplifier" to deliver higher-temperature refrigerant to the indoor unit module to release more heat to the indoor environment, thereby improving the heating effect of the indoor environment; in refrigeration, as a "cold energy intensifier", the lower-temperature refrigerant is delivered to the indoor unit module to absorb more heat from the indoor environment, thereby improving the refrigeration effect of the indoor environment. Therefore, the present application can effectively improve the operating capacity of the air conditioning system and ensure the stability of refrigeration or heating.

[0040] In addition, by providing a range-extending module between the indoor unit module and the outdoor unit module 2, the pressure loss in the long pipeline can be effectively compensated, ensuring that the refrigerant can maintain sufficient pressure when delivered to the remote indoor unit module. Therefore, the length of the pipe between the indoor unit module and the outdoor unit module 2 can be extended, so that the air conditioning system provided by the present application can meet more extensive areas, such as large shopping malls, office buildings, multi-story villas, and other complex pipeline scenarios.

[0041] Further, the range-extending module 3 is detachable, which gives the air conditioning system of the present application high adaptability and flexibility. In actual application, when some rooms or areas need to strengthen the refrigeration or heating effect, the staff can conveniently and quickly connect the range-extending module 3 with the first indoor unit module 1 and the outdoor unit module 2, thereby rapidly improving the refrigeration and heating capacity of the area to meet the higher requirements for temperature in special scenarios. Conversely, when there is no need to strengthen the temperature adjustment of a particular area, the range-extending module 3 can be easily detached to avoid unnecessary energy consumption and equipment occupation. Moreover, this detachable design allows users to add the range-extending module 3 to the existing system at any time according to actual needs, without the need for large-scale modification of the entire air conditioning system, thereby saving costs and improving the expandability and practicality of the system.

[0042] Preferably, the heat exchanger 34 is a plate heat exchanger.

[0043] The plate heat exchanger has a corrugated structure on the surface of the plate, which increases the turbulence degree of the fluid, destroys the boundary layer of the fluid, reduces the thermal resistance, and greatly improves the heat exchange coefficient.

[0044] Preferably, as shown in Figure 1 The range increasing module 3 includes a first compressor 31, a first four-way valve 32, a first expansion valve 33, and a heat exchanger 34. The exhaust pipe of the first compressor 31 is connected with the d port of the first four-way valve 32, the suction port of the first compressor 31 is connected with the s port of the first four-way valve 32, the first indoor unit module 1 and the heat exchanger 34 are connected with the e port and the c port of the first four-way valve 32 respectively, and the first expansion valve 33 is connected between the first indoor unit module 1 and the heat exchanger 34.

[0045] In the heating mode, the d port and the e port of the first four-way valve 32 are conducted, and the s port and the c port are conducted. The flow direction of the refrigerant is: the first compressor 31 exhaust (high temperature and high pressure)→d port→e port→the first indoor unit module 1 (heat release for heating)→the first expansion valve 33 (pressure reduction)→the heat exchanger 34 (heat absorption)→c port→s port→the first compressor 31 suction port. In this process, the outdoor unit module 2 absorbs heat from the low temperature environment, and then transmits the heat to the refrigerant of the second unit through the heat exchanger 34. The first compressor 31 further compresses and heats the refrigerant, and then delivers it to the indoor unit module to release higher temperature heat to the indoor environment, thereby improving the heating effect in the room.

[0046] In the cooling mode, the d port and the c port of the first four-way valve 32 are conducted, and the s port and the e port are conducted. The flow direction of the refrigerant is: the first compressor 31 exhaust (high temperature and high pressure)→d port→c port→the heat exchanger 34 (heat release)→the first expansion valve 33 (pressure reduction)→the first indoor unit module 1 (heat absorption for cooling)→e port→s port→the compressor suction port. In this process, the outdoor unit module 2 releases heat to the outdoor environment and releases cold to absorb the heat in the refrigerant in the second unit through the heat exchanger 34. After the first compressor 31 compresses and heats the refrigerant, the refrigerant absorbs the heat in the heat exchanger 34 when passing through the heat exchanger 34, so that the refrigerant entering the indoor unit module has a lower temperature, thereby absorbing more heat in the indoor environment, thereby improving the cooling effect in the room.

[0047] Preferably, as shown in Figure 1As shown, the range-extending module 3 further comprises a first oil separator 35 and a first gas-liquid separator 36. The exhaust pipe of the first compressor 31 is connected to the d port of the first four-way valve 32 after passing through the first oil separator 35, and the intake pipe of the first compressor 31 is connected to the s port of the first four-way valve 32 after passing through the first gas-liquid separator 36.

[0048] The lubricating oil (refrigeration oil) carried by the exhaust gas of the first compressor 31 will mix with the refrigerant. If the oil enters the system circulation, an oil film will be formed on the surface of the indoor unit module and the heat exchanger 34, reducing the heat exchange efficiency (increasing the thermal resistance) and causing the refrigeration or heating effect to decrease. The first oil separator 35 uses centrifugal separation + filter screen filtration to separate the lubricating oil particles in the high-speed airflow discharged by the first compressor 31. The separated lubricating oil is accurately returned to the crankcase of the first compressor 31 through the oil return hole, ensuring stable oil level, avoiding oil shortage operation of the second unit, reducing oil accumulation in the pipeline, preventing blockage and increasing thermal resistance, thereby prolonging the service life of the compressor and reducing the maintenance frequency.

[0049] When the refrigerant returns to the first compressor 31 through the intake port of the first compressor 31, it may carry liquid refrigerant. If the liquid refrigerant directly enters the first compressor 31, it will cause liquid hammer due to incompressibility. The first gas-liquid separator 36 reduces the airflow speed through diameter expansion design, allowing the liquid refrigerant to deposit at the bottom of the container under the action of gravity, thereby eliminating the risk of liquid hammer to the first compressor 31 and prolonging the service life of the first compressor 31.

[0050] Preferably, as shown, Figure 1 As shown, the outdoor unit module 2 comprises a second compressor 21, a second four-way valve 22, a second expansion valve 23, and an outdoor heat exchanger 24. The exhaust pipe of the second compressor 21 is connected to the d port of the second four-way valve 22, and the intake port of the second compressor 21 is connected to the s port of the second four-way valve 22. The heat exchanger 34 and the outdoor heat exchanger 24 are respectively connected to the e port and the c port of the second four-way valve 22. The second expansion valve 23 is connected between the heat exchanger 34 and the outdoor heat exchanger 24.

[0051] In the heating mode, the d port and the e port of the second four-way valve 22 are connected, and the s port and the c port are connected. The flow direction of the refrigerant is: the exhaust gas of the second compressor 21 (high temperature and high pressure) → the d port → the e port → the heat exchanger 34 (heat release to the range-extending module 3) → the second expansion valve 23 (pressure reduction) → the outdoor heat exchanger 24 (heat absorption from the outdoor environment) → the c port → the s port → the intake port of the second compressor 21. The second compressor 21 drives the refrigerant to absorb environmental heat in the outdoor heat exchanger 24 and deliver it to the heat exchanger 34. The heat exchanger 34 transfers the heat to the range-extending module 3, which further heats the refrigerant in the second unit. The heated refrigerant is delivered to the indoor unit module, thereby improving the heating efficiency and effect in the room.

[0052] In the cooling mode, the d port and the c port of the second four-way valve 22 are connected, and the s port and the e port are connected. The flow direction of the refrigerant is: the second compressor 21 exhaust (high temperature and high pressure) → the d port → the c port → the outdoor heat exchanger 24 (heat dissipation to the environment) → the second expansion valve 23 (pressure reduction) → the heat exchanger 34 (absorbing heat from the range extender module 3) → the e port → the s port → the second compressor 21 suction port. The second compressor 21 drives the refrigerant to release heat to the environment through the outdoor heat exchanger 24, and releases cold to the range extender module 3 through the heat exchanger 34, so as to be able to absorb the heat of the refrigerant in the second unit, reduce the supercooling degree of the refrigerant entering the indoor unit module, and thus be able to improve the cooling efficiency and effect of the indoor.

[0053] Preferably, as shown in Figure 1 The outdoor unit module 2 further includes a second oil separator 25 and a second gas-liquid separator 26. The exhaust pipe of the second compressor 21 is connected to the d port of the second four-way valve 22 after passing through the second oil separator 25. The suction pipe of the second compressor 21 is connected to the s port of the second four-way valve 22 after passing through the second gas-liquid separator 26.

[0054] Similar to the first oil separator 35 and the first gas-liquid separator 36, the second oil separator 25 can effectively intercept the lubricating oil particles in the high-speed gas flow discharged by the second compressor 21, so as to avoid oil shortage operation of the second unit, reduce the accumulation of oil in the pipeline, prevent blockage and increase of thermal resistance, thereby prolonging the service life of the compressor and reducing the maintenance frequency. The second gas-liquid separator 26 reduces the gas flow speed through the diameter expansion design, so that the liquid refrigerant is deposited at the bottom of the container under the action of gravity, thereby eliminating the risk of liquid impact on the second compressor 21 and prolonging the service life of the second compressor 21.

[0055] Preferably, as shown in Figure 2 The air conditioning system further includes a plurality of second indoor unit modules 4. The plurality of second indoor unit modules 4 are connected to the outdoor unit module 2 in parallel after being connected to the range extender module 3 to form a third unit. The third unit can perform indoor heating operation and / or indoor cooling operation.

[0056] By providing the second indoor unit module 4, and the second indoor unit module 4 and the outdoor unit module 2 forming the third unit, the use scenarios of the air conditioning system of the present application can be expanded. For example, in the scenarios of commercial complexes, villas, etc., the heating or cooling capacity required by different areas or rooms is different. For areas with forced heating or forced cooling, the range extender module 3 can be provided, and the first unit and the second unit can be used for combined heating or cooling. For areas with general heating or cooling requirements, the range extender module 3 can not be provided, and the third unit formed by the second indoor unit module 4 and the outdoor unit module 2 can be used for heating or cooling.

[0057] Preferably, as shown in Figure 2As shown, the first indoor unit module 1 includes a first indoor heat exchanger 11, and the two sides of the first indoor heat exchanger 11 are connected with the cooling liquid inlet pipe and the cooling liquid outlet pipe of the range extending module 3 respectively.

[0058] The refrigerant in the range extending module 3 flows into the first indoor heat exchanger 11 through the cooling liquid inlet pipe, exchanges heat in the first indoor heat exchanger 11, and then flows back to the range extending module 3 through the cooling liquid outlet pipe, so as to realize energy transmission and temperature regulation between the first indoor unit module 1 and the range extending module 3.

[0059] Preferably, as shown, Figure 2 As shown, the second indoor unit module 4 includes a second indoor heat exchanger 41, and the two sides of the second indoor heat exchanger 41 are connected with the cooling liquid inlet pipe and the cooling liquid outlet pipe of the outdoor unit module 2 respectively.

[0060] The refrigerant in the outdoor unit module 2 enters the second indoor heat exchanger 41 through the cooling liquid inlet pipe, exchanges heat, and then returns to the outdoor unit module 2 through the cooling liquid outlet pipe, so as to realize energy interaction and temperature control between the second indoor unit module 4 and the outdoor unit module 2.

[0061] Preferably, as shown, Figure 3 As shown, the first indoor unit module 1 is provided in plurality, and the plurality of first indoor unit modules 1 are connected in parallel with the range extending module 3.

[0062] The plurality of first indoor unit modules 1 are arranged in parallel, so that the air conditioning system can provide refrigeration or heating services for multiple different indoor areas at the same time. Each indoor unit module can be independently controlled, and parameters such as temperature and air speed can be adjusted according to the use demand and personnel activity of different areas, so as to realize personalized temperature control of multiple areas and greatly improve the adaptability of the air conditioning system to different space environments.

[0063] In addition, when one of the first indoor unit modules 1 fails, the other first indoor unit modules 1 can still work normally due to the parallel connection, and the failure of a single module will not cause the entire air conditioning system to malfunction. This design improves the reliability and stability of the system and reduces the inconvenience to users caused by equipment failure.

[0064] Preferably, as shown, Figure 4 As shown, the range extending module 3 and the first indoor unit module 1 are provided in plurality, each range extending module 3 is connected with at least one first indoor unit module 1, and the plurality of range extending modules 3 are connected in parallel with the outdoor unit module 2.

[0065] The arrangement of the plurality of range extending modules 3 and the first indoor unit modules 1 significantly enhances the refrigeration and heating capacity of the air conditioning system. The combination of the range extending modules 3 and the first indoor unit modules 1 can be flexibly allocated according to the size and use demand of different spaces, so as to meet the demand of large buildings or multiple areas for the air conditioning system and expand the coverage of the system.

[0066] Furthermore, each range extender module 3 is connected to at least one first indoor unit module 1. This flexible connection allows the system to dynamically adjust the cooling and heating effects of each zone based on actual usage. Multiple range extenders 3 connected in parallel to the outdoor unit module 2 allow the system to function normally even if some range extenders 3 malfunction or require maintenance, ensuring the normal operation of certain zones within the entire air conditioning system and improving the system's adaptability to different usage scenarios and emergencies.

[0067] In addition, the present invention also provides a multi-split air conditioner, which includes the above-mentioned air conditioning system.

[0068] Thus far, the technical solutions of the present invention have been described in conjunction with the preferred embodiments shown in the accompanying drawings. However, it will be readily understood by those skilled in the art that the scope of protection of the present invention is obviously not limited to these specific embodiments. Without departing from the principles of the present invention, those skilled in the art may make equivalent changes or substitutions to the relevant technical features, and the technical solutions after such changes or substitutions will fall within the scope of protection of the present invention.

Claims

1. An air conditioning system, characterized in that: The invention comprises a first indoor unit module (1), an outdoor unit module (2) and a range extender module (3), wherein the range extender module (3) is detachably arranged between the first indoor unit module (1) and the outdoor unit module (2), the outdoor unit module (2) is connected to a heat exchanger (34) of the range extender module (3) to form a first unit, wherein the first unit can perform outdoor heating operation and / or outdoor cooling operation, the first indoor unit module (1) is connected to the range extender module (3) to form a second unit, wherein the second unit can perform indoor heating operation and / or indoor cooling operation, and when the first unit and the second unit are in cooling or heating operation at the same time, the first unit can transfer cold or heat to the refrigerant in the second unit through the heat exchanger (34).

2. The air conditioning system according to claim 1, characterized in that A plurality of the first indoor unit modules (1) are provided, and the plurality of the first indoor unit modules (1) are connected in parallel and then connected to the range extender module (3).

3. The air conditioning system according to claim 1, characterized in that The range extender module (3) and the first indoor unit module (1) are both provided in plurality, each of the range extender modules (3) is connected to at least one of the first indoor unit modules (1), and the plurality of range extender modules (3) are connected in parallel to the outdoor unit module (2).

4. The air conditioning system according to claim 1, characterized in that The range extender module (3) comprises a first compressor (31), a first four-way valve (32), a first expansion valve (33) and the heat exchanger (34); the exhaust pipe of the first compressor (31) is connected to the d port of the first four-way valve (32); the air inlet of the first compressor (31) is connected to the s port of the first four-way valve (32); the first indoor unit module (1) and the heat exchanger (34) are respectively connected to the e port and the c port of the first four-way valve (32); and the first expansion valve (33) is connected between the first indoor unit module (1) and the heat exchanger (34).

5. The air conditioning system according to claim 4, characterized in that The range extender module (3) further includes a first oil separator (35) and a first gas-liquid separator (36); the exhaust pipe of the first compressor (31) is connected to the d port of the first four-way valve (32) after passing through the first oil separator (35); and the intake pipe of the first compressor (31) is connected to the s port of the first four-way valve (32) after passing through the first gas-liquid separator (36).

6. The air conditioning system according to claim 1, characterized in that The outdoor unit module (2) comprises a second compressor (21), a second four-way valve (22), a second expansion valve (23) and an outdoor heat exchanger (24); the exhaust pipe of the second compressor (21) is connected to the d port of the second four-way valve (22); the air inlet of the second compressor (21) is connected to the s port of the second four-way valve (22); the heat exchanger (34) and the outdoor heat exchanger (24) are respectively connected to the e port and the c port of the second four-way valve (22); and the second expansion valve (23) is connected between the heat exchanger (34) and the outdoor heat exchanger (24).

7. The air conditioning system according to claim 6, characterized in that The outdoor unit module (2) further comprises a second oil separator (25) and a second gas-liquid separator (26); the exhaust pipe of the second compressor (21) is connected to the d port of the second four-way valve (22) after passing through the second oil separator (25); and the intake pipe of the second compressor (21) is connected to the s port of the second four-way valve (22) after passing through the second gas-liquid separator (27).

8. The air conditioning system according to claim 1, characterized in that The air conditioning system further comprises a plurality of second indoor unit modules (4), wherein the plurality of second indoor unit modules (4) are connected in parallel with the range extender module (3) and then connected to the outdoor unit module (2) to form a third unit, wherein the third unit is capable of performing indoor heating operation and / or indoor cooling operation.

9. The air conditioning system according to claim 8, characterized in that The first indoor unit module (1) comprises a first indoor heat exchanger (11), both sides of the first indoor heat exchanger (11) are respectively connected to the coolant inlet pipe and the coolant outlet pipe of the range extender module (3), and / or The second indoor unit module (4) includes a second indoor heat exchanger (41), and both sides of the second indoor heat exchanger (41) are respectively connected to the cooling liquid inlet pipe and the cooling liquid outlet pipe of the outdoor unit module (2).

10. A multi-split air conditioner, characterized in that: An air conditioning system comprising the air conditioning system according to any one of claims 1 to 9.

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