Multi-split air conditioner and method for controlling multi-split air conditioner

Abstract

The application relates to the air conditioning technical field, and discloses a multi-connected air conditioner, which comprises a water circulation and fluorine circulation double system, wherein the water circulation system comprises indoor water heat exchangers arranged in rooms, and the fluorine circulation system comprises indoor fluorine heat exchangers arranged in the rooms. The first four-way valve and the second four-way valve of the fluorine circulation system are controlled by a controller to switch the passage, so that the indoor water heat exchanger realizes refrigeration or heating, and the indoor fluorine heat exchanger realizes evaporation or condensation, and the single start-stop of the heat exchanger in each room is controlled, different functions can be realized in different rooms, different modes can be simultaneously realized in different rooms, the function of the multi-connected air conditioner is enriched, the different function demands of different rooms for the multi-connected air conditioner are met, and the user experience is improved. The application further discloses a method for controlling the multi-connected air conditioner.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of air conditioning technology, for example to a multi-split air conditioner and a method for controlling the multi-split air conditioner. BACKGROUND

[0002] At present, with the improvement of living standards, users have more diverse functional requirements for air conditioners. Different rooms have different requirements when using air conditioners.

[0003] The related technology discloses a central air conditioner, comprising a compressor, an outdoor heat exchanger, a throttling element and two indoor terminals respectively provided with two indoor heat exchangers, which can work in evaporation or condensation state; the controller has: a reheating dehumidification control part configured to make one indoor heat exchanger work in evaporation state and the other work in condensation state when receiving a reheating dehumidification instruction; a self-cleaning control part configured to make the two indoor heat exchangers work in evaporation state and then work in condensation state when receiving a self-cleaning instruction; an intervention control part configured to execute intervention control and start an auxiliary control element to execute the function compensation of the former when one of the reheating dehumidification control part and the self-cleaning control part is in working state, the corresponding control instruction of the other is received, and the corresponding target indoor terminal is different from the indoor terminal currently in working state. Overcome the contradiction between reheating dehumidification and self-cleaning functions, avoid linear waiting time-sharing operation to reduce user experience.

[0004] In the process of implementing the embodiments of the present disclosure, it is found that at least the following problems exist in the related art:

[0005] Although the related technology meets the user's demand for the reheating dehumidification function and the self-cleaning function of the air conditioner to some extent, the user's demand for the function of the air conditioner not only includes the reheating dehumidification function and the self-cleaning function of a single room, but also includes other functions such as all rooms cooling at the same time, all rooms heating at the same time, part of the rooms cooling and part of the rooms heating, reheating dehumidification, part of the rooms cooling and part of the rooms reheating dehumidification, part of the rooms heating and part of the rooms reheating dehumidification, and non-stop defrosting. Therefore, the current multi-split air conditioner has single function and cannot meet the demand of different rooms for different functions, and the user experience is poor.

[0006] It should be noted that the information disclosed in the above BACKGROUND section is only used to strengthen the understanding of the background of the present application, and therefore can include information that does not constitute prior art known to those of ordinary skill in the art. SUMMARY

[0007] In order to have a basic understanding of some aspects of the disclosed embodiments, the following is a simple summary. The summary is not a general review, nor is it intended to determine the key / important elements or delineate the scope of protection of these embodiments, but as a prelude to the detailed description that follows.

[0008] The multi-split air conditioner and the method for controlling the multi-split air conditioner provided by the embodiments of the present disclosure can achieve the following technical effects:

[0009] In some embodiments, the multi-split air conditioner comprises: a water circulation system comprising indoor water heat exchangers arranged in each room; a fluorine circulation system comprising a first four-way valve, a second four-way valve, and indoor fluorine heat exchangers arranged in each room; wherein the first four-way valve is used to control the evaporation or condensation of the indoor fluorine heat exchanger; the second four-way valve is used to control the refrigeration or heating of the indoor water heat exchanger; a plurality of indoor fans are arranged in each room respectively, and are used to blow the air supply from the indoor water heat exchanger to the indoor fluorine heat exchanger; and a controller is used to control the switching of the paths of the first four-way valve and the second four-way valve, and the start and stop of each indoor fan, each indoor water heat exchanger, and each indoor fluorine heat exchanger.

[0010] In some embodiments, the method comprises: obtaining a target operation mode of each room; and controlling the switching of the paths of the first four-way valve and the second four-way valve, and the start and stop of each indoor fan, each indoor water heat exchanger, and each indoor fluorine heat exchanger according to the target mode of each room.

[0011] The multi-split air conditioner and the method for controlling the multi-split air conditioner provided by the embodiments of the present disclosure can achieve the following technical effects:

[0012] The water circulation and fluorine circulation double systems are provided, wherein the water circulation system comprises indoor water heat exchangers arranged in each room, and the fluorine circulation system comprises indoor fluorine heat exchangers arranged in each room. The controller is used to control the switching of the paths of the first four-way valve and the second four-way valve of the fluorine circulation system to achieve the refrigeration or heating of the indoor water heat exchanger, and the evaporation or condensation of the indoor fluorine heat exchanger, and to control the start and stop of the heat exchangers in each room. All rooms can be simultaneously refrigerated, all rooms can be simultaneously heated, part of the rooms can be refrigerated and part of the rooms can be heated, reheat dehumidification can be achieved, part of the rooms can be refrigerated and part of the rooms can be reheat dehumidified, part of the rooms can be heated and part of the rooms can be reheat dehumidified, and the defrosting without stopping can be achieved. Thus, different rooms can operate in different modes, the functions of the multi-split air conditioner are enriched, the different functional requirements of different rooms for the multi-split air conditioner are met, and the user experience is improved.

[0013] The general description above and the following description below are exemplary and explanatory only and are not intended to be limiting. BRIEF DESCRIPTION OF DRAWINGS

[0014] One or more embodiments are illustrated by way of example in the figures that are presented for illustration purposes only, and are not intended to limit the embodiments, elements of the figures having the same reference numbers designate the same or similar elements, the figures are not to scale, and in which:

[0015] Figure 1 is a schematic diagram of a multi-split air conditioner provided by an embodiment of the present disclosure;

[0016] Figure 2 is a schematic diagram of a method for controlling a multi-split air conditioner provided by an embodiment of the present disclosure;

[0017] Figure 3 is a schematic diagram of another method for controlling a multi-split air conditioner provided by an embodiment of the present disclosure;

[0018] Figure 4 is a schematic diagram of another method for controlling a multi-split air conditioner provided by an embodiment of the present disclosure;

[0019] Figure 5 is a schematic diagram of an apparatus for controlling a multi-split air conditioner provided by an embodiment of the present disclosure;

[0020] Figure 6 is a schematic diagram of a multi-split air conditioner provided by an embodiment of the present disclosure.

[0021] Reference signs:

[0022] 11: compressor; 12: oil separator; 13: gas-liquid separator; 14: outdoor heat exchanger; 15: high-pressure accumulator; 16: first four-way valve; 17: second four-way valve; 18: indoor fluorine heat exchanger; 19: water-fluorine heat exchanger; 20: refrigerant heat dissipation device; 21: supercooling coil; 22: high-pressure switch; 23: capillary tube; 24: water-fluorine expansion valve; 25: gas-side stop valve; 26: liquid-side stop valve; 31: water inlet pipe; 32: water outlet pipe; 33: indoor water heat exchanger; 34: water pump; 35: water outlet; 36: expansion tank; 37: electric heater; 38: water-side electromagnetic valve. DETAILED DESCRIPTION

[0023] In order to enable a person skilled in the art to more fully understand the features and technical contents of the embodiments of the present disclosure, the implementation of the embodiments of the present disclosure will be described in detail below with reference to the accompanying drawings, which are used only for reference and are not intended to limit the embodiments of the present disclosure. In the following technical description, in order to facilitate explanation, a plurality of details are provided to provide a full understanding of the disclosed embodiments. However, one or more embodiments can still be implemented without these details. In other cases, in order to simplify the drawings, well-known structures and devices can be simplified.

[0024] The terms "first", "second", and the like in the description and claims of the present disclosure and above drawings are used to distinguish similar objects, and do not necessarily indicate a specific order or sequence. It should be understood that the data thus used can be interchanged under appropriate circumstances, so that the embodiments of the present disclosure described herein can be implemented. In addition, the terms "comprise" and "have" and any variations thereof are intended to cover non-exclusive inclusion.

[0025] Unless otherwise specified, the term "a plurality of" means two or more.

[0026] In the embodiments of the present disclosure, the character " / " represents a "or" relationship between the preceding and following objects. For example, A / B represents: A or B.

[0027] The term "and / or" is a description of the association relationship between objects, which means that there can be three relationships. For example, A and / or B means: A or B, or, A and B, the three relationships.

[0028] The term "corresponding" can refer to an association relationship or a binding relationship. A and B correspond to each other means that there is an association relationship or a binding relationship between A and B.

[0029] In the embodiments of the present disclosure, the smart home appliance refers to a home appliance product formed after introducing microprocessors, sensor technology, network communication technology into home appliances, having the characteristics of intelligent control, intelligent perception and intelligent application. The operation process of the smart home appliance often depends on the application and processing of modern technologies such as the Internet of Things, the Internet and electronic chips. For example, the smart home appliance can realize remote control and management of the smart home appliance by the user through connection with electronic devices.

[0030] In the embodiments of the present disclosure, the terminal device refers to an electronic device with wireless connection function. The terminal device can be connected to the Internet and communicate with the smart home appliance as above, or can be directly connected to the smart home appliance as above through Bluetooth, wifi and the like. In some embodiments, the terminal device is, for example, a mobile device, a computer, or a built-in vehicle device in a hovercar, or any combination thereof. The mobile device may, for example, include a mobile phone, a smart home device, a wearable device, a smart mobile device, a virtual reality device, or any combination thereof, wherein the wearable device may, for example, include a smart watch, a smart bracelet, a pedometer, and the like.

[0031] In combination Figure 1As shown, the embodiment of the present disclosure discloses a multi-split air conditioner, comprising a water circulation system, a fluorine circulation system, a water-fluorine heat exchanger 19, a plurality of indoor air fans and a controller. The water circulation system comprises indoor water heat exchangers 33 arranged in each room. The fluorine circulation system comprises a first four-way valve 16, a second four-way valve 17 and indoor fluorine heat exchangers 18 arranged in each room; wherein the first four-way valve 16 is used to control the evaporation or condensation of the indoor fluorine heat exchanger 18; the second four-way valve 17 is used to control the refrigeration or heating of the indoor water heat exchanger 33. A plurality of indoor air fans are arranged in each room respectively, for blowing the supply air from the indoor water heat exchanger 33 to the indoor fluorine heat exchanger 18. The controller is used to control the switching of the paths of the first four-way valve 16 and the second four-way valve 17, and the start-stop of each indoor air fan, each indoor water heat exchanger 33 and each indoor fluorine heat exchanger 18.

[0032] Wherein, the controller is a device for controlling the multi-split air conditioner. The indoor fluorine heat exchanger 18 can be a fluorine coil, or a radiation cold plate or a floor heating coil. The indoor water heat exchanger 33 can be a water coil, or a radiation cold plate or a floor heating coil.

[0033] Specifically, by controlling the evaporation of the indoor fluorine heat exchanger 18 in each room, the indoor water heat exchanger 33 is in refrigeration, i.e. all rooms can be refrigerated at the same time; by controlling the condensation of the indoor fluorine heat exchanger 18 in each room, the indoor water heat exchanger 33 is in heating, i.e. all rooms can be heated at the same time; by closing the heat exchanger in heating or condensation state in the room needing refrigeration, and closing the heat exchanger in refrigeration or evaporation state in the room needing heating, partial room refrigeration and partial room heating can be achieved; by controlling the two heat exchangers to refrigerate or heat respectively in the room needing reheat dehumidification, reheat dehumidification can be achieved; by controlling the two heat exchangers to refrigerate and heat respectively in the room needing reheat dehumidification, and closing the heat exchanger in heating state in the room needing refrigeration, partial room refrigeration and partial room reheat dehumidification can be achieved; by controlling the two heat exchangers to refrigerate and heat respectively in the room needing reheat dehumidification, and closing the heat exchanger in refrigeration state in the room needing heating, partial room heating and partial room reheat dehumidification can be achieved; the realization of the function of non-stop defrosting is the same as the realization of the reheat dehumidification function, when the heat exchangers are separately refrigerated and heated, the indoor temperature can be kept constant, and the outdoor heat exchanger 14 is in condensation state for defrosting.

[0034] In this way, the passages in the fluorine circulation system can be switched by the first four-way valve 16 and the second four-way valve 17, so that the indoor fluorine heat exchanger 18 is in the evaporation or condensation state, and the indoor water heat exchanger 33 is in the heating or cooling state. By controlling the indoor fluorine heat exchanger 18 and the indoor water heat exchanger 33 to independently cool or heat, respectively, and controlling the indoor fluorine heat exchanger 18 and the indoor water heat exchanger 33 to be in the open or closed state, respectively, different combinations of cooling or heating can be achieved in different rooms to meet the different needs of users in different rooms. Thus, the functions of the multi-split air conditioner are enriched, the different needs of different rooms for the multi-split air conditioner are met, and the user experience is improved.

[0035] Optionally, the fluorine circulation system further comprises a compressor 11, an oil separator 12, an outdoor heat exchanger 14, a gas-liquid separator 13, and a high-pressure liquid accumulator 15. The compressor 11 comprises an exhaust pipe and a return pipe. The oil separator 12 is arranged on the exhaust pipe of the compressor 11, and a high-pressure switch 22 is arranged between the oil separator 12 and the compressor 11. The oil port of the oil separator 12 is connected to the return pipe of the compressor 11 through a drying filter and a capillary tube 23. The gas port of the oil separator 12 is connected to the D pipe of the first four-way valve 16 and the second four-way valve 17, respectively. The E pipe of the first four-way valve 16 is connected to each indoor fluorine heat exchanger 18 through a drying filter and a gas-side stop valve 25. The E pipe of the second four-way valve 17 is connected to the water-fluorine heat exchanger 19. The fluorine circulation system and the water circulation system exchange heat through the water-fluorine heat exchanger 19. The inlet of the outdoor heat exchanger 14 is connected to the C pipe of the second four-way valve 17, and the outlet is connected to a refrigerant heat dissipation device 20. The refrigerant heat dissipation device 20 is connected to the supercooling coil 21 through a first pipe and a second pipe, respectively, and the first pipe is used to supercool the second pipe. The first pipe is connected in parallel to the S pipes of the first four-way valve 16 and the second four-way valve 17 and then enters the gas-liquid separator 13, and the outlet of the gas-liquid separator 13 is connected to the return pipe. The inlet of the high-pressure liquid accumulator 15 is connected to the second pipe, and the outlet is connected to each indoor fluorine heat exchanger 18 through a liquid-side stop valve 26. The water-fluorine heat exchanger 19 is connected to the high-pressure liquid accumulator 15 through a water-fluorine expansion valve 24.

[0036] Specifically, when the target mode of each room is the cooling mode, the first four-way valve 16 is controlled to switch to the state that the D pipe and the C pipe are connected, and the E pipe and the S pipe are connected, and the second four-way valve 17 is also switched to the state that the D pipe and the C pipe are connected, and the E pipe and the S pipe are connected. The exhaust gas of the compressor 11 enters the outdoor heat exchanger 14 through the second four-way valve 17, the electronic expansion valve at the outdoor heat exchanger 14 is adjusted to an appropriate opening degree, and the outlet of the outdoor heat exchanger 14 reaches a suitable supercooling degree. The supercooled liquid from the outdoor heat exchanger 14 then flows through the refrigerant heat dissipation device 20 and is then divided into two paths and enters the first pipe and the second pipe, respectively. The refrigerant in the first pipe is throttled and cooled and then enters the gas-liquid separator 13. The refrigerant in the second pipe is throttled and cooled by the first pipe and then enters the high-pressure liquid accumulator 15. The liquid from the high-pressure liquid accumulator 15 is divided into two paths, one of which enters the water-fluorine heat exchanger 19 after throttling by the water-fluorine expansion valve 24 and exchanges heat with the water circulation system, the water circulation system provides cold water for the indoor water heat exchanger 33 through the water-fluorine heat exchanger 19, and the water-side electromagnetic valve 38 of the room requiring cooling is fully open. After heat exchange, it flows through the E pipe and the S pipe of the second four-way valve 17 into the gas-liquid separator 13. The other path passes through the liquid-side stop valve 26 to enter the indoor side, is throttled and enters the indoor fluorine heat exchanger 18 for evaporation, and then enters the gas-liquid separator 13 through the E pipe and the S pipe of the first four-way valve 16. Since the fluorine circulation system is a primary heat exchanger and the water circulation system is a secondary heat exchanger, the temperature of the indoor fluorine heat exchanger 18 is lower than that of the indoor water heat exchanger 33, and the temperature of the indoor water heat exchanger 33 can be adjusted by controlling the water flow. The indoor fan blows air from the indoor water heat exchanger 33 to the indoor fluorine heat exchanger 18, first removes sensible heat and then removes latent heat, realizes heat and humidity removal, and can improve system energy efficiency.

[0037] Specifically, when the target mode of each room is the heating mode, the first four-way valve 16 is switched to the state that the D pipe and the E pipe are connected, and the C pipe and the S pipe are connected, and the second four-way valve 17 is also switched to the state that the D pipe and the E pipe are connected, and the C pipe and the S pipe are connected. The exhaust gas of the compressor 11 is divided into two paths, one of which enters the indoor fluorine heat exchanger 18 in the room requiring heating from the first four-way valve 16, evaporates, and is adjusted to an appropriate opening degree by the corresponding indoor electronic expansion valve to control the indoor fluorine heat exchanger 18 pressure and supercooling degree, thereby improving the heat exchange efficiency and better heating the indoor. The refrigerant becomes a supercooled liquid after heat exchange in the indoor fluorine heat exchanger 18, and then flows into the high-pressure liquid accumulator 15. The other path enters the water-fluorine heat exchanger 19 from the second four-way valve 17 and exchanges heat with the water circulation system, and the indoor water-side electromagnetic valve 38 of the room requiring heating is opened, so that the indoor water heat exchanger 33 heats the indoor. The refrigerant becomes a supercooled liquid after heat exchange with the water circulation loop in the water-fluorine heat exchanger 19, and then flows into the high-pressure liquid accumulator 15, and the fluorine side pressure and supercooling degree are controlled by the indoor electronic expansion valve. The liquid in the high-pressure liquid accumulator 15 is throttled and absorbs heat after passing through the supercooling coil 21, the refrigerant heat dissipation device 20 and the supercooling section of the outdoor heat exchanger 14, and returns to the gas-liquid separator 13 to complete the cycle. The water circulation loop is a secondary heat exchanger, so the temperature of the indoor water heat exchanger 33 is slightly lower than that of the indoor fluorine heat exchanger 18, and the temperature of the indoor water heat exchanger 33 can be controlled by the water flow. During heating, air first exchanges heat with the indoor water heat exchanger 33 with a lower temperature, and then exchanges heat with the indoor fluorine heat exchanger 18 with a higher temperature, thereby achieving a larger heat exchange temperature difference and energy cascade utilization.

[0038] Specifically, when the target mode of each room includes the cooling mode and the heating mode, the first four-way valve 16 is switched to the state that the D pipe and the E pipe are connected, and the C pipe and the S pipe are connected, and the second four-way valve 17 is switched to the state that the D pipe and the C pipe are connected, and the E pipe and the S pipe are connected. The exhaust gas of the compressor 11 is divided into two paths, the first path passes through the D pipe and the E pipe of the first four-way valve 16, enters the indoor fluorine heat exchanger 18 in the room requiring heating, and heats the room, becomes a supercooled liquid and then flows back to the high-pressure liquid accumulator 15. The second path passes through the D pipe and the C pipe of the second four-way valve 17, enters the outdoor heat exchanger 14 to condense, becomes a supercooled liquid, and then enters the high-pressure liquid accumulator 15 after passing through the refrigerant heat dissipation device 20 and the supercooling coil 21. The supercooled liquid from the indoor fluorine heat exchanger 18 and the high-pressure liquid accumulator 15 are throttled and enter the water-fluorine heat exchanger 19 to exchange heat, so that the water circulation system cools, and then flows back to the gas-liquid separator 13. The high-pressure liquid accumulator 15 can adjust the refrigerant flow entering the water-fluorine heat exchanger 19. The water circulation system provides cold water for the indoor water heat exchanger 33 of the room requiring cooling, thereby realizing the cooling of the room.

[0039] Specifically, when the target mode of each room is the reheating dehumidification mode or the non-stop defrosting mode, the first four-way valve 16 is switched to the state that the D pipe and the E pipe are connected, and the C pipe and the S pipe are connected, and the second four-way valve 17 is switched to the state that the D pipe and the C pipe are connected, and the E pipe and the S pipe are connected. The indoor electronic expansion valve corresponding to the room requiring reheating dehumidification or non-stop defrosting is adjusted to the target opening degree to control the condensing pressure and the outlet supercooling degree of the indoor fluorine heat exchanger 18, and the water side electromagnetic valve 38 is fully opened. The exhaust gas of the compressor 11 is divided into two paths, the first path enters the indoor fluorine heat exchanger 18 of the room requiring reheating dehumidification or non-stop defrosting through the first four-way valve 16 to realize the reheating function, and becomes a supercooled liquid after passing through the indoor fluorine heat exchanger 18 and then flows back to the high-pressure liquid accumulator 15. The second path enters the outdoor heat exchanger 14 to condense, becomes a supercooled liquid, and then enters the high-pressure liquid accumulator 15 after passing through the refrigerant heat dissipation device 20 and the supercooling coil 21. The supercooled liquid from the indoor fluorine coil throttles and enters the water-fluorine heat exchanger 19 to exchange heat, so that the water circulation system refrigerates, and then flows back to the gas-liquid separator 13. The high-pressure liquid accumulator 15 can adjust the refrigerant flow entering the water-fluorine heat exchanger 19. The water circulation system provides cold water for the indoor water heat exchanger 33 of the room requiring reheating dehumidification or non-stop defrosting, so that the high-temperature and high-humidity indoor air first blows through the indoor water heat exchanger 33 to dehumidify and become low-temperature and low-humidity air, and then passes through the indoor fluorine heat exchanger 18 to heat and become high-temperature and low-humidity air to be sent back to the indoor, thereby realizing the function of reheating dehumidification. In addition, at this time, the outdoor heat exchanger 14 is in the condensing state to defrost, the indoor water heat exchanger 33 is low-temperature, the indoor fluorine heat exchanger 18 is high-temperature, the indoor air first cools through the indoor water heat exchanger 33 and then heats through the indoor fluorine heat exchanger 18, and the temperature of the inlet and outlet air is maintained constant. Thus, the system continuously runs and the indoor maintains the supply air when the outdoor heat exchanger 14 defrosts, and the outlet air temperature remains unchanged.

[0040] Specifically, when the target mode of each room includes the cooling mode and the reheating dehumidifying mode, the first four-way valve 16 is switched to the state that the D pipe and the E pipe are connected, and the C pipe and the S pipe are connected, and the second four-way valve 17 is switched to the state that the D pipe and the C pipe are connected, and the E pipe and the S pipe are connected. The exhaust gas of the compressor 11 is divided into two paths, the first path enters the indoor fluorine heat exchanger 18 of the room requiring the reheating dehumidifying through the first four-way valve 16, the reheating function is realized, and the over-cooled liquid after passing through the indoor fluorine heat exchanger 18 flows back to the high-pressure liquid accumulator 15. The second path enters the outdoor heat exchanger 14 to condense through the second four-way valve 17, becomes the over-cooled liquid, and then enters the high-pressure liquid accumulator 15 after passing through the refrigerant heat dissipation device 20 and the over-cooled coil 21. The over-cooled liquid from the indoor fluorine coil throttles through the high-pressure liquid accumulator 15 and enters the water-fluorine heat exchanger 19 to exchange heat, so that the water circulation system cools, and then flows back to the gas-liquid separator 13. The high-pressure liquid accumulator 15 can adjust the refrigerant flow entering the water-fluorine heat exchanger 19. The water circulation system provides cold water for the indoor water heat exchanger 33 of the room requiring the reheating dehumidifying or cooling. The indoor fluorine heat exchanger 18 in the room requiring the cooling is controlled to be closed, and the water side electromagnetic valve 38 is opened. Thus, the indoor water heat exchanger 33 of the room requiring the reheating dehumidifying cools, and the indoor fluorine heat exchanger 18 heats. The indoor water heat exchanger 33 of the room requiring the cooling cools, and the indoor fluorine heat exchanger 18 is closed, so that the partial room cooling and the partial room reheating dehumidifying are realized.

[0041] Specifically, when the target mode of each room includes the cooling mode and the reheating dehumidifying mode, the first four-way valve 16 is switched to the state that the D pipe and the E pipe are connected, and the C pipe and the S pipe are connected, and the second four-way valve 17 is switched to the state that the D pipe and the C pipe are connected, and the E pipe and the S pipe are connected. The exhaust gas of the compressor 11 is divided into two paths, the first path enters the indoor fluorine heat exchanger 18 of the room requiring the reheating dehumidifying or cooling through the first four-way valve 16, the reheating function and the heating function are realized respectively, and the over-cooled liquid after passing through the indoor fluorine heat exchanger 18 flows back to the high-pressure liquid accumulator 15. The second path enters the outdoor heat exchanger 14 to condense through the second four-way valve 17, becomes the over-cooled liquid, and then enters the high-pressure liquid accumulator 15 after passing through the refrigerant heat dissipation device 20 and the over-cooled coil 21. The over-cooled liquid from the indoor fluorine coil throttles through the high-pressure liquid accumulator 15 and enters the water-fluorine heat exchanger 19 to exchange heat, so that the water circulation system cools, and then flows back to the gas-liquid separator 13. The high-pressure liquid accumulator 15 can adjust the refrigerant flow entering the water-fluorine heat exchanger 19. The water circulation system provides cold water for the indoor water heat exchanger 33 of the room requiring the reheating dehumidifying. The indoor water heat exchanger 33 in the room requiring the heating is controlled to be closed. Thus, the indoor water heat exchanger 33 of the room requiring the reheating dehumidifying cools, and the indoor fluorine heat exchanger 18 heats. The indoor fluorine heat exchanger 18 of the room requiring the heating cools, and the indoor water heat exchanger 33 is closed, so that the partial room heating and the partial room reheating dehumidifying are realized.

[0042] Thus, by the above structure, the first four-way valve 16 switches to control the indoor fluorine heat exchanger 18 to evaporate or condense, and the second four-way valve 17 is used to control the indoor water heat exchanger 33 to refrigerate or heat. Thus, different types of heat exchangers in different states can be combined and started or stopped respectively to achieve the functions of refrigerating all rooms simultaneously, heating all rooms simultaneously, refrigerating part of the rooms and heating part of the rooms, reheat dehumidification, refrigerating part of the rooms and reheat dehumidification, heating part of the rooms and reheat dehumidification, and defrosting without stopping.

[0043] Optionally, the water circulation system further comprises a water inlet pipe 31 and a water outlet pipe 32. The outlet pipes of the indoor water heat exchangers 33 are connected in parallel and then enter the water fluorine heat exchanger 19 through the water inlet pipe 31. A water pump 34, a water outlet 35 and an expansion tank 36 are arranged in sequence on the water inlet pipe 31. The inlet pipes of the indoor water heat exchangers 33 are connected in parallel and then connected to the water fluorine heat exchanger 19 through the water outlet pipe 32. An electric heater 37 is arranged on the water outlet pipe 32. Water side electromagnetic valves 38 are arranged on the inlet pipes of the indoor water heat exchangers 33 correspondingly.

[0044] Optionally, the indoor fluorine heat exchangers 18 are correspondingly provided with electronic expansion valves for controlling the temperature of the heat exchangers by adjusting the refrigerant flow.

[0045] Thus, by the arrangement of the water side electromagnetic valves 38, the indoor water heat exchangers 33 in each room can be controlled to start or stop individually, so that different modes can be combined.

[0046] Optionally, when the first four-way valve 16 switches the first passage, the indoor fluorine heat exchanger 18 is in an evaporating state. When the first four-way valve 16 switches the second passage, the indoor fluorine heat exchanger 18 is in a condensing state. When the second four-way valve 17 switches the first passage, the indoor water heat exchanger 33 is in a refrigerating state. When the second four-way valve 17 switches the second passage, the indoor water heat exchanger 33 is in a heating state. The first passage is connected with the D pipe and the C pipe and connected with the E pipe and the S pipe. The second passage is connected with the D pipe and the E pipe and connected with the C pipe and the S pipe.

[0047] Thus, by the first four-way valve 16 switching to control the indoor fluorine heat exchanger 18 to evaporate or condense, and the second four-way valve 17 being used to control the indoor water heat exchanger 33 to refrigerate or heat, different types of heat exchangers in different states can be combined and started or stopped respectively to achieve the simultaneous operation of different modes in different rooms.

[0048] Optionally, the multi-split air conditioner further comprises an electronic expansion valve arranged on the first pipe between the supercooling coil 21 and the gas-liquid separator 13, and / or an electronic expansion valve arranged between the supercooling coil 21 and the compressor 11.

[0049] Thus, by arranging the electronic expansion valve on the first pipeline between the supercooling coil 21 and the gas-liquid separator 13; and / or arranging the electronic expansion valve between the supercooling coil 21 and the compressor 11, the electronic expansion valve can be used to supplement air from the supercooling coil 21 to the gas-liquid separator 13 and / or the compressor 11, thereby improving the efficiency and performance of the fluorine circulation system.

[0050] In combination Figure 2 As shown in the drawings, the embodiment of the present disclosure provides a method for controlling a multi-split air conditioner, comprising:

[0051] S21, the controller obtains a target operation mode of each room.

[0052] S22, the controller controls the first four-way valve and the second four-way valve to switch the passage according to the target mode of each room, and controls the start and stop of each indoor fan, each indoor water heat exchanger and each indoor fluorine heat exchanger.

[0053] By using the method for controlling a multi-split air conditioner provided by the embodiment of the present disclosure, the indoor water heat exchanger refrigeration or heating and the indoor fluorine heat exchanger evaporation or condensation are realized by controlling the first four-way valve and the second four-way valve of the fluorine circulation system to switch the passage, and the start and stop of each indoor heat exchanger in each room are controlled, so that the functions of simultaneous refrigeration of all rooms, simultaneous heating of all rooms, partial room refrigeration and partial room heating, reheat dehumidification, partial room refrigeration and partial room reheat dehumidification, partial room heating and partial room reheat dehumidification, and non-stop defrosting are realized. Thus, different rooms can run in different modes, the functions of the multi-split air conditioner are enriched, the different functional requirements of different rooms for the multi-split air conditioner are met, and the user experience is improved.

[0054] Optionally, the controller controls the first four-way valve and the second four-way valve to switch the passage according to the target mode of each room, and controls the start and stop of each indoor fan, each indoor water heat exchanger and each indoor fluorine heat exchanger, comprising: when the target mode of each room is the refrigeration mode, the controller starts the indoor fan and controls the first four-way valve and the second four-way valve to switch to the first passage; when the target mode of each room is the heating mode, the controller starts the indoor fan and controls the first four-way valve and the second four-way valve to switch to the second passage.

[0055] Thus, when the target mode of each room is the cooling mode, the first four-way valve is switched to a state where the D pipe and the C pipe are connected, and the E pipe and the S pipe are connected, and the second four-way valve is also switched to a state where the D pipe and the C pipe are connected, and the E pipe and the S pipe are connected. Since the fluorine circulation system is primary heat exchange, and the water circulation system is secondary heat exchange, the indoor fluorine heat exchanger has a lower temperature than the indoor water heat exchanger, and the temperature of the indoor water heat exchanger can be adjusted by controlling the water flow. The indoor fan blows air from the indoor water heat exchanger to the indoor fluorine heat exchanger, first removes sensible heat and then removes latent heat, realizes heat and humidity separation, and can improve system energy efficiency. When the target mode of each room includes the cooling mode and the heating mode, the first four-way valve is switched to a state where the D pipe and the E pipe are connected, and the C pipe and the S pipe are connected, and the second four-way valve is switched to a state where the D pipe and the C pipe are connected, and the E pipe and the S pipe are connected. The water circulation circuit is secondary heat exchange, so the temperature of the indoor water heat exchanger is slightly lower than the temperature of the indoor fluorine heat exchanger, and the temperature of the indoor water heat exchanger can be controlled by the water flow. During heating, the air first exchanges heat through the indoor water heat exchanger with a lower temperature, and then exchanges heat through the indoor fluorine heat exchanger with a higher temperature, realizing a large heat exchange temperature difference and energy cascade utilization.

[0056] Optionally, the controller controls the first four-way valve and the second four-way valve to switch the path, and controls the indoor fan, the indoor water heat exchanger, and the indoor fluorine heat exchanger to start and stop according to the target mode of each room, including: when the target mode of each room includes the cooling mode and the heating mode, the controller starts the indoor fan, controls the first four-way valve to switch to the first path, controls the second four-way valve to switch to the second path, closes the indoor fluorine heat exchanger in the cooling mode room, and closes the indoor water heat exchanger in the heating mode room.

[0057] Thus, when the target mode of each room includes the cooling mode and the heating mode, the first four-way valve is switched to a state where the D pipe and the E pipe are connected, and the C pipe and the S pipe are connected, and the second four-way valve is switched to a state where the D pipe and the C pipe are connected, and the E pipe and the S pipe are connected. The compressor exhaust is divided into two paths, the first path passes through the D pipe and the E pipe of the first four-way valve, enters the indoor fluorine heat exchanger in the room needing heating, and heats the room, and the second path passes through the D pipe and the C pipe of the second four-way valve, enters the outdoor heat exchanger to condense, becomes a supercooled liquid, and then enters the high-pressure liquid accumulator after passing through the refrigerant heat dissipation device and the supercooling coil. The supercooled liquid from the indoor fluorine heat exchanger throttles through the high-pressure liquid accumulator and the water fluorine heat exchanger to exchange heat, so that the water circulation system cools, and the water circulation system provides cold water for the indoor water heat exchanger of the room needing cooling, thereby realizing cooling of the room.

[0058] In combination Figure 3 As shown in the figure, the embodiment of the present disclosure provides a method for controlling a multi-split air conditioner, including:

[0059] S21, the controller obtains the target operation mode of each room.

[0060] S31, when the target mode of each room is the reheating dehumidification mode or the non-stop defrosting mode, the controller starts the indoor fan, controls the first four-way valve to switch to the first passage, and controls the second four-way valve to switch to the second passage.

[0061] When the target mode of each room is the reheating dehumidification mode or the non-stop defrosting mode, the first four-way valve is switched to the state that the D pipe and the E pipe are connected, and the C pipe and the S pipe are connected, and the second four-way valve is switched to the state that the D pipe and the C pipe are connected, and the E pipe and the S pipe are connected. The compressor exhaust is divided into two paths, the first path enters the indoor fluorine heat exchanger of the room requiring reheating dehumidification or non-stop defrosting through the first four-way valve to realize the reheating function, and the second path enters the outdoor heat exchanger to condense, becomes a supercooled liquid, and then enters the high-pressure liquid accumulator through the refrigerant heat dissipation device and the supercooling coil. The supercooled liquid from the indoor fluorine coil throttles into the water-fluorine heat exchanger to exchange heat, so that the water circulation system refrigerates, and the water circulation system provides cold water for the indoor water heat exchanger of the room requiring reheating dehumidification or non-stop defrosting. In addition, at this time, the outdoor heat exchanger is in a condensing state for defrosting, the indoor water heat exchanger is low-temperature, and the indoor fluorine heat exchanger is high-temperature. The indoor air is first cooled by the indoor water heat exchanger and then heated by the indoor fluorine heat exchanger, thereby maintaining the constant temperature of the inlet and outlet air. Thus, the system continuously runs and the indoor air maintains the supply air when the outdoor heat exchanger defrosts, and the outlet air temperature remains unchanged.

[0062] Optionally, the controller controls the first four-way valve and the second four-way valve to switch the passage, and controls the start and stop of the indoor fan, the indoor water heat exchanger, and the indoor fluorine heat exchanger according to the target mode of each room, including: when the target mode of each room includes the refrigeration mode and the reheating dehumidification mode, the controller starts the indoor fan, controls the first four-way valve to switch to the first passage, controls the second four-way valve to switch to the second passage, and closes the indoor fluorine heat exchanger of the room in the refrigeration mode.

[0063] In this way, when the target mode of each room includes the refrigeration mode and the reheating dehumidification mode, the first four-way valve is switched to the state that the D pipe and the E pipe are connected, and the C pipe and the S pipe are connected, and the second four-way valve is switched to the state that the D pipe and the C pipe are connected, and the E pipe and the S pipe are connected. The indoor fluorine heat exchanger in the room requiring refrigeration is controlled to be closed, and the water side electromagnetic valve is opened. Thus, the indoor water heat exchanger in the room requiring reheating dehumidification is refrigerated, and the indoor fluorine heat exchanger is heated. The indoor water heat exchanger in the room requiring refrigeration is refrigerated, and the indoor fluorine heat exchanger is closed, thereby realizing the refrigeration of part of the rooms and the reheating dehumidification of part of the rooms.

[0064] Optionally, the controller controls the first four-way valve and the second four-way valve to switch the passage and controls the indoor fan, the indoor water heat exchanger and the indoor fluorine heat exchanger to start and stop according to the target mode of each room, including: when the target mode of each room includes the heating mode and the reheating dehumidification mode, the controller starts the indoor fan, controls the first four-way valve to switch to the first passage, controls the second four-way valve to switch to the second passage, and closes the indoor water heat exchanger of the room in the heating mode.

[0065] In this way, when the target mode of each room includes the heating mode and the reheating dehumidification mode, the first four-way valve is switched to the state that the D pipe and the E pipe are connected and the C pipe and the S pipe are connected, and the second four-way valve is switched to the state that the D pipe and the C pipe are connected and the E pipe and the S pipe are connected. The indoor water heat exchanger in the room requiring heating is closed. Thus, the indoor water heat exchanger in the room requiring reheating dehumidification is cooled and the indoor fluorine heat exchanger is heated. The indoor fluorine heat exchanger in the room requiring heating is cooled and the indoor water heat exchanger is closed, so that the rooms are heated and the rooms are reheated and dehumidified.

[0066] In combination Figure 4 As shown in the drawings, the embodiment of the present disclosure provides a method for controlling a multi-split air conditioner, including:

[0067] S21, the controller obtains the target operation mode of each room.

[0068] S22, the controller controls the first four-way valve and the second four-way valve to switch the passage and controls the indoor fan, the indoor water heat exchanger and the indoor fluorine heat exchanger to start and stop according to the target mode of each room.

[0069] S41, the controller adjusts the rotation speed of the indoor fan and / or the rotation speed of the water pump and / or the opening degree of the water side electromagnetic valve and / or the opening degree of the electronic expansion valve according to the target temperature of each room.

[0070] By using the method for controlling a multi-split air conditioner provided by the embodiment of the present disclosure, the water flow of the indoor water heat exchanger can be adjusted by controlling the rotation speed of the indoor fan and / or the rotation speed of the water pump and / or the opening degree of the water side electromagnetic valve. The supercooling degree and the pressure of the outlet of the indoor fluorine heat exchanger can be adjusted by the opening degree of the electronic expansion valve. Thus, by adjusting the above parameters, the temperature difference between the indoor water heat exchanger and the indoor fluorine heat exchanger can be ensured to be within the set range according to the target temperature, so that the system energy efficiency is improved.

[0071] Specifically, when the target modes are all cooling modes, the controller can determine a first range corresponding to the target temperature according to a preset correspondence relationship. Since the fluorine cycle system is primary heat exchange and the water cycle system is secondary heat exchange, the temperature of the indoor fluorine heat exchanger is lower than that of the indoor water heat exchanger, and the temperature of the indoor water heat exchanger can be adjusted by controlling the water flow. Air is blown from the indoor water heat exchanger to the indoor fluorine heat exchanger, and latent heat is removed after sensible heat, realizing heat and humidity separation, and improving system energy efficiency. Therefore, the indoor fan speed and / or the water pump speed and / or the opening degree of the water side electromagnetic valve are controlled to control the water flow of the indoor water heat exchanger, and the opening degree of the electronic expansion valve is controlled to adjust the temperature, outlet pressure and supercooling degree of the indoor fluorine heat exchanger, so that the temperature difference between the indoor water heat exchanger and the indoor fluorine heat exchanger is within the first range, thereby improving system energy efficiency and making the indoor temperature reach the target temperature faster. When the target modes are all heating modes, the controller can determine a second range corresponding to the target temperature according to a preset correspondence relationship. The water cycle circuit is secondary heat exchange, so the temperature of the indoor water heat exchanger is slightly lower than that of the indoor fluorine heat exchanger, and the temperature of the indoor water heat exchanger can be controlled by the water flow. During heating, air is first exchanged by the indoor water heat exchanger with lower temperature, and then by the indoor fluorine heat exchanger with higher temperature, realizing a large heat exchange temperature difference and energy cascade utilization. Therefore, the indoor fan speed and / or the water pump speed and / or the opening degree of the water side electromagnetic valve are controlled to control the water flow of the indoor water heat exchanger, and the opening degree of the electronic expansion valve is controlled to adjust the temperature, outlet pressure and supercooling degree of the indoor fluorine heat exchanger, so that the temperature difference between the indoor water heat exchanger and the indoor fluorine heat exchanger is within the second range, thereby realizing a large heat exchange temperature difference and energy cascade utilization, and making the indoor temperature reach the target temperature faster. When the target modes of each room include cooling modes and heating modes, the controller can also adjust the high-pressure liquid accumulator to control the refrigerant flow entering the water-fluorine heat exchanger, thereby improving system energy efficiency. When the target modes of each room are reheating dehumidification modes or non-stop defrosting modes, the controller can control the temperature of the indoor water heat exchanger by controlling the opening degree of the expansion tank before the water-fluorine heat exchanger and the flow of the water pump. The condensing temperature and refrigerant flow of the indoor fluorine heat exchanger can be controlled by controlling the frequency of the compressor and the opening degree of the indoor electronic expansion valve, thereby realizing the control of the reheating amount to control the temperature of the reheated air. In this way, the temperature and humidity of the heating dehumidification are independently controlled, thereby realizing temperature rising dehumidification, constant temperature dehumidification and temperature dropping dehumidification to meet the needs of different use scenarios of users. When the target modes of each room include cooling modes and reheating dehumidification modes, or heating modes and reheating dehumidification modes, the controller can adjust the refrigerant flow entering the water-fluorine heat exchanger through the high-pressure liquid accumulator, thereby improving system energy efficiency and realizing the control of the temperature of the indoor water heat exchanger.

[0072] In combination Figure 4 As shown in the drawings, the embodiment of the present disclosure provides a method for controlling a multi-split air conditioner, comprising:

[0073] S01, the controller obtains a target operation mode of each room.

[0074] S02, the controller controls the first four-way valve and the second four-way valve to switch the passage, and controls the indoor fan, the indoor water heat exchanger and the indoor fluorine heat exchanger to start and stop according to the target mode of each room.

[0075] S03, the controller controls the frequency of the compressor and the opening degree of the indoor electronic expansion valve according to the target temperature of each room.

[0076] In combination Figure 5 As shown in the figure, the embodiment of the present disclosure provides a controller, i.e. a device 300 for controlling a multi-split air conditioner, which comprises a processor 301 and a memory 101. Optionally, the device can also comprise a communication interface 102 and a bus 103. Wherein the processor 301, the communication interface 102 and the memory 101 can complete the communication among each other through the bus 103. The communication interface 102 can be used for information transmission. The processor 301 can call the logical instructions in the memory 101 to execute the method for controlling the multi-split air conditioner in the above-mentioned embodiment.

[0077] In addition, the logical instructions in the memory 101 mentioned above can be realized in the form of a software functional unit and sold or used as an independent product when used, which can be stored in a computer readable storage medium.

[0078] The memory 101 as a kind of computer readable storage medium can be used to store software programs, computer executable programs, such as program instructions / modules corresponding to the method in the embodiment of the present disclosure. The processor 301 executes the program instructions / modules stored in the memory 101, thereby executing function application and data processing, i.e. realizing the method for controlling the multi-split air conditioner in the above-mentioned embodiment.

[0079] The memory 101 can include a program storage area and a data storage area, wherein the program storage area can store an operating system, at least one application required by a function; the data storage area can store data created according to the use of the terminal equipment, etc. In addition, the memory 101 can include a high-speed random access memory, and can also include a non-volatile memory.

[0080] In combination Figure 6As shown, the embodiment of the present disclosure provides a multi-split air conditioner 100, comprising: a multi-split air conditioner body, and the above-mentioned device 200 (300) for controlling the multi-split air conditioner. The device 200 (300) for controlling the multi-split air conditioner is installed on the multi-split air conditioner body. The installation relationship expressed herein is not limited to being placed inside the multi-split air conditioner, but also includes installation connection with other components of the multi-split air conditioner, including but not limited to physical connection, electrical connection or signal transmission connection, etc. Those skilled in the art can understand that the device 200 (300) for controlling the multi-split air conditioner can be adapted to a feasible multi-split air conditioner body, thereby realizing other feasible embodiments.

[0081] The embodiment of the present disclosure provides a storage medium, which stores computer executable instructions, and the computer executable instructions are configured to execute the above-mentioned method for controlling the multi-split air conditioner.

[0082] The above-mentioned storage medium can be a transitory storage medium or a non-transitory storage medium.

[0083] The technical solution of the embodiment of the present disclosure can be embodied in the form of a software product. The computer software product is stored in a storage medium and includes one or more instructions to make a computer device (which can be a personal computer, a server, or a network device, etc.) execute all or part of the steps of the method described in the embodiment of the present disclosure. The above-mentioned storage medium can be a non-transitory storage medium, including: a U disk, a mobile hard disk, a read-only memory (ROM, Read-Only Memory), a random access memory (RAM, Random Access Memory), a magnetic disk or an optical disk, etc. various media that can store program codes, or a transitory storage medium.

[0084] The foregoing description and accompanying drawings fully illustrate embodiments of this disclosure to enable those skilled in the art to practice them. Other embodiments may include structural, logical, electrical, procedural, and other changes. The embodiments represent only possible variations. Individual components and functions are optional unless explicitly required, and the order of operation may vary. Parts and features of some embodiments may be included in or replace parts and features of other embodiments. Moreover, the terminology used in this application is for describing embodiments only and is not intended to limit the claims. As used in the description of embodiments and claims, the singular forms “a,” “an,” and “the” are intended to equally include the plural forms unless the context clearly indicates otherwise. Similarly, the term “and / or” as used in this application means including one or more of the associated listed items and all possible combinations thereof. Additionally, when used in this application, the term "comprise" and its variations "comprises" and / or "comprising" refer to the presence of stated features, integrals, steps, operations, elements, and / or components, but do not exclude the presence or addition of one or more other features, integrals, steps, operations, elements, components, and / or groups thereof. Without further limitations, an element defined by the phrase "comprises a..." does not exclude the presence of other identical elements in the process, method, or apparatus that includes said element. In this document, each embodiment may focus on the differences from other embodiments, and similar or identical parts between embodiments can be referred to mutually. For methods, products, etc., disclosed in the embodiments, if they correspond to the method section disclosed in the embodiments, the relevant parts can be referred to the description of the method section.

[0085] Those skilled in the art will recognize that the units and algorithm steps of the various examples described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are implemented in hardware or software depends on the specific application and design constraints of the technical solution. Those skilled in the art can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of the embodiments of this disclosure. Those skilled in the art will clearly understand that, for the sake of convenience and brevity, the specific working processes of the systems, devices, and units described above can be referred to the corresponding processes in the foregoing method embodiments, and will not be repeated here.

[0086] In the embodiments disclosed herein, the disclosed methods, products (including but not limited to apparatuses, devices, etc.) can be implemented in other manners. For example, the described apparatus embodiments are merely schematic. For example, the division of the units is merely a logical function division. There can be another division manner for the actual implementation, for example, multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. In addition, the displayed or discussed mutual couplings or direct couplings or communication connections between different units, or among them, can be indirect couplings or communication connections through some interfaces, devices, or units, and can be in electric, mechanical, or other forms.

[0087] The flowcharts and block diagrams in the drawings show the possible implementation architectures, functions, and operations of the system, method, and computer program product according to the embodiments of the present disclosure. In this regard, each block in the flowcharts or block diagrams can represent a module, a program segment, or a part of code, which contains one or more executable instructions for implementing the specified logical function. In some alternative implementations, the functions noted in the blocks can occur in an order different from that noted in the drawings. For example, two consecutive blocks can actually be executed substantially in parallel, and sometimes they can be executed in reverse order, depending on the functions involved. In the descriptions corresponding to the flowcharts and block diagrams in the drawings, the operations or steps corresponding to different blocks can also occur in an order different from that disclosed in the descriptions, and sometimes there is no specific order between different operations or steps. For example, two consecutive operations or steps can actually be executed substantially in parallel, and sometimes they can be executed in reverse order, depending on the functions involved. Each block in the block diagrams and / or flowcharts, and the combination of blocks in the block diagrams and / or flowcharts, can be implemented by a dedicated hardware-based system that performs the specified functions or actions, or can be implemented by a combination of dedicated hardware and computer instructions.

Claims

1. A multi-split air conditioner, characterized in that, Comprise: Water circulation system, including indoor water heat exchanger arranged in each room; Fluorine circulation system, including first four-way valve, second four-way valve and indoor fluorine heat exchanger arranged in each room; wherein, the first four-way valve is used for controlling the indoor fluorine heat exchanger to evaporate or condense; the second four-way valve is used for controlling the indoor water heat exchanger to refrigerate or heat; A plurality of indoor fans are arranged in each room respectively, which are used for blowing the air from the indoor water heat exchanger to the indoor fluorine heat exchanger; The controller is used for controlling the first four-way valve and the second four-way valve to switch the path, and the start and stop of each indoor fan, each indoor water heat exchanger and each indoor fluorine heat exchanger; The fluorine circulation system further comprises: Compressor, including exhaust pipe and return pipe; Oil separator is arranged on the exhaust pipe of the compressor, the oil port of the oil separator is connected with the return pipe of the compressor through the dry filter and the capillary tube; the gas port of the oil separator is connected with the D pipe of the first four-way valve and the second four-way valve respectively; the E pipe of the first four-way valve is connected with each indoor fluorine heat exchanger through the dry filter and the gas side stop valve; the E pipe of the second four-way valve is connected with the water fluorine heat exchanger; wherein, the fluorine circulation system and the water circulation system exchange heat through the water fluorine heat exchanger; Outdoor heat exchanger, inlet connected with C pipe of second four-way valve, outlet connected with refrigerant heat dissipation device; refrigerant heat dissipation device is connected with supercooling coil through first pipeline and second pipeline respectively, first pipeline is used for supercooling second pipeline; Gas-liquid separator, first pipeline is connected with S pipe of first four-way valve and second four-way valve in parallel and then enters gas-liquid separator, outlet of gas-liquid separator is connected with return pipe; High pressure liquid accumulator, inlet connected with second pipeline, outlet connected with each indoor fluorine heat exchanger through liquid side stop valve; water fluorine heat exchanger is connected with high pressure liquid accumulator through water fluorine expansion valve.

2. The air conditioner of claim 1, wherein The water circulation system further comprises: Water inlet pipe, the outlet pipe of each indoor water heat exchanger is connected with water fluorine heat exchanger through water inlet pipe after being connected in parallel; water pump, water outlet and expansion tank are arranged on water inlet pipe in sequence; Water outlet pipe, the inlet pipe of each indoor water heat exchanger is connected with water fluorine heat exchanger through water outlet pipe after being connected in parallel; electric heater is arranged on water outlet pipe; water side electromagnetic valve is arranged on the inlet pipe of each indoor water heat exchanger correspondingly.

3. The air conditioner according to claim 1 or 2, characterized by Further comprising: When the first four-way valve switches the first path, the indoor fluorine heat exchanger is in evaporating state; When the first four-way valve switches the second path, the indoor fluorine heat exchanger is in condensing state; When the second four-way valve switches the first path, the indoor water heat exchanger is in refrigeration state; When the second four-way valve switches the second path, the indoor water heat exchanger is in heating state; Wherein, the first path is connected with D pipe and C pipe, and E pipe and S pipe; the second path is connected with D pipe and E pipe, and C pipe and S pipe.

4. A method for controlling a multi-split air conditioner control, the method comprising: Applied to multi-split air conditioner in any one of claims 1 to 3; the method comprises: Obtaining target operation mode of each room; According to the target mode of each room, the first four-way valve and the second four-way valve are controlled to switch the path, and each indoor fan, each indoor water heat exchanger and each indoor fluorine heat exchanger are controlled to start and stop.

5. The method of claim 4, wherein, According to the target mode of each room, the first four-way valve and the second four-way valve are controlled to switch the path, and each indoor fan, each indoor water heat exchanger and each indoor fluorine heat exchanger are controlled to start and stop, comprising: When the target mode of each room is the cooling mode, starting the indoor fan, controlling the first four-way valve and the second four-way valve to switch to the first passage; When the target mode of each room is the heating mode, starting the indoor fan, controlling the first four-way valve and the second four-way valve to switch to the second passage.

6. The method of claim 4, wherein, The control of the first four-way valve and the second four-way valve to switch the passage according to the target mode of each room, and the starting and stopping of the indoor fan, the indoor water heat exchanger and the indoor fluorine heat exchanger of each room, comprises: When the target mode of each room includes the cooling mode and the heating mode, starting the indoor fan, controlling the first four-way valve to switch to the first passage, the second four-way valve to switch to the second passage, closing the indoor fluorine heat exchanger in the cooling mode room, and closing the indoor water heat exchanger in the heating mode room.

7. The method of claim 4, wherein, The control of the first four-way valve and the second four-way valve to switch the passage according to the target mode of each room, and the starting and stopping of the indoor fan, the indoor water heat exchanger and the indoor fluorine heat exchanger of each room, comprises: When the target mode of each room is the reheating dehumidification mode or the non-stop defrosting mode, starting the indoor fan, controlling the first four-way valve to switch to the first passage, and the second four-way valve to switch to the second passage.

8. The method of claim 4, wherein, The control of the first four-way valve and the second four-way valve to switch the passage according to the target mode of each room, and the starting and stopping of the indoor fan, the indoor water heat exchanger and the indoor fluorine heat exchanger of each room, comprises: When the target mode of each room includes the cooling mode and the reheating dehumidification mode, starting the indoor fan, controlling the first four-way valve to switch to the first passage, and the second four-way valve to switch to the second passage, and closing the indoor fluorine heat exchanger in the cooling mode room.

9. The method according to any one of claims 4 to 8, characterized in that, The control of the first four-way valve and the second four-way valve to switch the passage according to the target mode of each room, and the starting and stopping of the indoor fan, the indoor water heat exchanger and the indoor fluorine heat exchanger of each room, comprises: When the target mode of each room includes the heating mode and the reheating dehumidification mode, starting the indoor fan, controlling the first four-way valve to switch to the first passage, and the second four-way valve to switch to the second passage, and closing the indoor water heat exchanger in the heating mode room.

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