Refrigerant leakage control method of multi-split air conditioner with hydraulic module and multi-split air conditioner

Abstract

This invention discloses a refrigerant leakage control method, operation control device, multi-split air conditioner with a hydraulic module, and a computer-readable storage medium. The multi-split air conditioner includes an outdoor unit, several indoor units, and a hydraulic module installed in an equipment room. The equipment room is equipped with a first fan for exhausting air to the outdoor space. The hydraulic module is equipped with a second fan for blowing air from the equipment room into the hydraulic module, a third fan for exhausting air from the hydraulic module into the outdoor space, and a refrigerant detection sensor installed inside the hydraulic module. The method includes: acquiring the refrigerant concentration detected by the refrigerant detection sensor; and controlling the first fan, the second fan, and the third fan according to the refrigerant concentration. This method effectively addresses refrigerant leakage, reduces its impact, eliminates the need for the forced ventilation system in the equipment room to be constantly on, and balances energy consumption, resulting in greater energy efficiency.

Description

Technical Field

[0001] This invention relates to the field of air conditioning technology, and in particular to a refrigerant leakage control method, operation control device, multi-split air conditioner with hydraulic module, and computer-readable storage medium. Background Technology

[0002] Currently, for multi-split air conditioning systems that use flammable refrigerants and are equipped with hydraulic modules, the hydraulic modules do not have a forced ventilation device. According to the explosion-proof requirements of flammable refrigerants, the hydraulic modules need to be installed separately in an equipment room with a forced ventilation device, and the forced ventilation device must be kept on at all times. This results in high system energy consumption and makes it impossible to take into account both the impact of refrigerant leakage and energy consumption. Summary of the Invention

[0003] The purpose of this invention is to at least solve one of the technical problems existing in the prior art, and to provide a refrigerant leakage control method, operation control device, multi-split air conditioner with hydraulic module, and computer-readable storage medium, which can effectively deal with refrigerant leakage, reduce the impact of refrigerant leakage, and take into account energy consumption, thus achieving greater energy efficiency.

[0004] In a first aspect, embodiments of the present invention provide a refrigerant leakage control method for a multi-split air conditioner with a hydraulic module. The multi-split air conditioner includes an outdoor unit, a plurality of indoor units, and a hydraulic module disposed in an equipment room. The equipment room is equipped with a first fan for exhausting air to an outdoor space. The hydraulic module is equipped with a second fan for blowing air from the equipment room into the hydraulic module, a third fan for exhausting air from the inside of the hydraulic module to an outdoor space, and a refrigerant detection sensor disposed inside the hydraulic module. The method includes:

[0005] Obtain the refrigerant concentration detected by the refrigerant detection sensor;

[0006] The first fan, the second fan, and the third fan are controlled according to the refrigerant concentration to reduce the impact of refrigerant leakage.

[0007] The refrigerant leakage control method for a multi-split air conditioner with a hydraulic module provided by the present invention has at least the following beneficial effects: A refrigerant detection sensor is installed inside the hydraulic module, capable of detecting whether a refrigerant leak has occurred inside the hydraulic module; the hydraulic module is also equipped with a third fan that exhausts air from inside the hydraulic module to the outdoor space, capable of discharging the leaked refrigerant outdoors when a refrigerant leak is detected inside the hydraulic module; the hydraulic module is also equipped with a second fan that blows air from the equipment room into the hydraulic module, thereby assisting in detecting the refrigerant concentration in the equipment room; a first fan is installed in the equipment room, capable of activating when a high refrigerant concentration is detected in the equipment room, thereby discharging the leaked refrigerant indoors to the outside; the refrigerant leakage control method for the multi-split air conditioner, by acquiring the refrigerant concentration detected by the refrigerant detection sensor, controls the operation of the first, second, and third fans, enabling the detection of refrigerant concentration inside the hydraulic module and in the equipment room, effectively addressing refrigerant leakage, reducing the impact of refrigerant leakage, eliminating the need for the forced ventilation device in the equipment room to remain constantly open, and taking into account energy consumption, thus achieving greater energy efficiency.

[0008] According to some embodiments of the refrigerant leakage control method provided by the present invention, the step of controlling the first fan, the second fan, and the third fan according to the refrigerant concentration includes:

[0009] When the refrigerant concentration is greater than the preset concentration, the third fan is turned on, and the refrigerant concentration is continuously measured and compared with the preset concentration;

[0010] If the refrigerant concentration is less than the preset concentration for a first preset time period, the second fan is turned on, and the refrigerant concentration is continuously measured and compared with the preset concentration.

[0011] When the refrigerant concentration exceeds the preset concentration again, the first fan is turned on.

[0012] According to some embodiments of the refrigerant leakage control method provided by the present invention, after turning on the second fan or turning on the first fan:

[0013] If the refrigerant concentration is less than the preset concentration for a second preset time period, the first fan, the second fan, and the third fan are turned off.

[0014] According to some embodiments of the refrigerant leakage control method provided by the present invention, an electric water valve is installed on the outlet pipe of the hydraulic module, and the method further includes:

[0015] When the refrigerant concentration is greater than the preset concentration, the electric water valve is closed.

[0016] According to some embodiments of the refrigerant leakage control method provided by the present invention, a main shut-off valve is provided on the refrigerant main pipe connecting the outdoor unit to both the indoor unit and the hydraulic module, and an electronic expansion valve is provided on the refrigerant branch pipe connecting the outdoor unit to the hydraulic module. The method further includes:

[0017] When the refrigerant concentration is greater than the preset concentration, the main circuit shut-off valve and the electronic expansion valve are closed, and the compressor of the outdoor unit is stopped.

[0018] According to some embodiments of the refrigerant leakage control method provided by the present invention, the method of controlling the main circuit shut-off valve and the electronic expansion valve to close, and controlling the compressor of the outdoor unit to stop, includes:

[0019] Close the main circuit shut-off valve;

[0020] The compressor of the outdoor unit will be shut off after the timer reaches the third preset duration or when the return gas pressure is lower than the preset pressure value.

[0021] Close the electronic expansion valve.

[0022] According to some embodiments of the refrigerant leakage control method provided by the present invention, the order of closing the main circuit shut-off valve and closing the electronic expansion valve is interchanged.

[0023] In a second aspect, embodiments of the present invention provide an operation control device, including a memory, a processor, and a computer program stored in the memory and executable on the processor. The processor executes the program to implement the refrigerant leakage control method described in the first aspect embodiment above.

[0024] Thirdly, embodiments of the present invention provide a multi-unit air conditioner, including the operation control device described in the second aspect of the embodiments above.

[0025] Fourthly, embodiments of the present invention provide a computer-readable storage medium storing computer-executable instructions for causing a computer to perform the refrigerant leakage control method as described in the first aspect embodiment above.

[0026] Other features and advantages of the invention will be set forth in the description which follows, and will be apparent in part from the description, or may be learned by practicing the invention. The objects and other advantages of the invention may be realized and obtained by means of the structures particularly pointed out in the description, claims, and drawings. Attached Figure Description

[0027] The accompanying drawings are provided to further understand the technical solutions of the present invention and constitute a part of the specification. They are used together with the embodiments of the present invention to explain the technical solutions of the present invention, and do not constitute a limitation on the technical solutions of the present invention.

[0028] The present invention will be further described below with reference to the accompanying drawings and embodiments;

[0029] Figure 1 This is a system diagram of a multi-unit air conditioning system with a hydraulic module provided in an embodiment of the present invention;

[0030] Figure 2 This is a system diagram of the hydraulic module of the multi-unit air conditioner provided in an embodiment of the present invention;

[0031] Figure 3 This is a flowchart of a refrigerant leakage control method for a multi-split air conditioner provided in one embodiment of the present invention;

[0032] Figure 4 yes Figure 3 A flowchart detailing the steps of step S320 in the process;

[0033] Figure 5 This is a flowchart of a refrigerant leakage control method for a multi-split air conditioner provided in another embodiment of the present invention;

[0034] Figure 6 This is a schematic diagram of the operation control device provided in an embodiment of the present invention. Detailed Implementation

[0035] This section will describe in detail specific embodiments of the present invention. Preferred embodiments of the present invention are shown in the accompanying drawings. The purpose of the drawings is to supplement the textual description with graphics, so that people can intuitively and vividly understand each technical feature and overall technical solution of the present invention, but they should not be construed as limiting the scope of protection of the present invention.

[0036] In the description of the embodiments of the present invention, "several" means one or more, "multiple" means two or more, "greater than," "less than," "exceeding," etc. are understood to exclude the number itself, while "above," "below," "within," etc. are understood to include the number itself. "At least one" refers to one or more, and "at least one of the following" and similar expressions refer to any combination of these items, including any combination of single or multiple items. If "first," "second," etc., are used in the description, they are only for the purpose of distinguishing technical features and should not be construed as indicating or implying relative importance or implicitly indicating the number of indicated technical features or the order of the indicated technical features.

[0037] It should be noted that the terms "setting," "installing," and "connecting" in the embodiments of this invention should be interpreted broadly. Those skilled in the art can reasonably determine the specific meaning of the above terms in the embodiments of this invention in conjunction with the specific content of the technical solution. For example, the term "connection" can be a mechanical connection, an electrical connection, or a connection that allows for mutual communication; it can be a direct connection or an indirect connection through an intermediate medium.

[0038] It should be noted that the technical features involved in the various embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0039] Currently, for multi-split air conditioning systems using flammable refrigerants and equipped with hydraulic modules, the hydraulic modules lack forced ventilation. Due to the explosion-proof requirements of flammable refrigerants, the hydraulic modules need to be installed separately in an equipment room with forced ventilation, and this ventilation must be kept constantly open. This results in high system energy consumption and fails to adequately address the impact of refrigerant leaks on energy consumption. Furthermore, if a refrigerant leak occurs due to the freezing and explosion of the hydraulic module's heat exchanger, the flammable refrigerant can enter the indoor rooms through the water lines, posing a risk to users.

[0040] Based on this, embodiments of the present invention provide a refrigerant leakage control method, operation control device, multi-split air conditioner with hydraulic module, and computer-readable storage medium, which can effectively deal with refrigerant leakage, reduce the impact of refrigerant leakage, and take into account energy consumption, thus achieving greater energy efficiency.

[0041] The embodiments of the present invention will be further described below with reference to the accompanying drawings.

[0042] Figure 1 This is a system diagram of a multi-unit air conditioning system with a hydraulic module 200 provided in an embodiment of the present invention. (Refer to...) Figure 1 The multi-split air conditioning system includes an outdoor unit 100, several indoor units, and a hydraulic module 200 installed in the equipment room. It may include indoor units A, B, and C, which can be installed in the same room or in different rooms.

[0043] It is also understandable that, referring to Figure 1The outdoor unit 100 may include a compressor 110, a four-way valve 120, an outdoor heat exchanger 130, a first refrigerant main pipe 140, a second refrigerant main pipe 150, a gas-liquid separator 160, and a main shut-off valve 170. The discharge port of the compressor 110 is connected to the first connection port of the four-way valve 120, the second connection port of the four-way valve 120 is connected to the outdoor heat exchanger 130, the outdoor heat exchanger 130 is connected to the first refrigerant main pipe 140, and the first refrigerant main pipe 140 is further connected to multiple first refrigerant branch pipes. The system connects to indoor units A, B, and C, as well as the hydraulic module 200. The third connection port of the four-way valve 120 connects to the second refrigerant main pipe 150, which, through multiple second refrigerant branch pipes, connects to indoor units A, B, and C, and the hydraulic module 200. The fourth connection port of the four-way valve 120 connects to the gas-liquid separator 160, which connects to the suction port of the compressor 110. The main shut-off valve 170 is located on the second refrigerant main pipe 150. Additionally, each first refrigerant branch pipe is equipped with an electronic expansion valve, for example... Figure 1 The electronic expansion valves A, B, C, and D are shown; each first refrigerant branch pipe and each second refrigerant branch pipe is equipped with a shut-off valve.

[0044] Reference Figure 1 The equipment room is equipped with a first fan 300 for exhausting air to the outdoor space. (Refer to...) Figure 1 and Figure 2The hydraulic module 200 is equipped with a second fan 210 for blowing air from the equipment room into the hydraulic module 200, a third fan 220 for exhausting air from the hydraulic module 200 into the outdoor space, and a refrigerant detection sensor 230 installed inside the hydraulic module 200. The third fan 220 can be connected to the outside via a connecting duct 221. The hydraulic module 200 also includes a water-side heat exchanger 240, a water pump 250, an electric heating tank 260, an outlet water pipe 270, and an inlet water pipe 280. Specifically: the first refrigerant main pipe 140 of the outdoor unit 100 is connected to one end of the refrigerant-side pipeline of the water-side heat exchanger 240 via a first refrigerant branch pipe; the second refrigerant main pipe 150 of the outdoor unit 100 is connected to the other end of the refrigerant-side pipeline of the water-side heat exchanger 240 via a second refrigerant branch pipe; the inlet water pipe 280 is connected to one end of the water-side pipeline of the water-side heat exchanger 240; the water pump 250 is installed on the inlet water pipe 280; and the other end of the water-side pipeline of the water-side heat exchanger 240 is connected to... The electric heating tank 260 is connected to the inlet and outlet of the electric heating tank 260 to the outlet pipe 270. An electric heater 261 is installed inside the electric heating tank 260, and an exhaust valve 262 is installed on the top of the electric heating tank 260. An electric water valve 271 is installed on the outlet pipe 270. A pressure relief valve 241 and a flow switch 242 are installed on the pipe between the water-side heat exchanger 240 and the electric heating tank 260. The pipe between the electric heating tank 260 and the electric water valve 271 is also connected to the expansion tank.

[0045] In addition, refer to Figure 1 The multi-split system also includes heating terminals. The heating module can be set in room A. The outlet pipe 270 and inlet pipe 280 of the hydraulic module 200 are respectively connected to the heating terminals. Manual ball valves 272 and 281 can also be installed on the pipes connecting the outlet pipe 270 and the inlet pipe 280 to the heating terminals, respectively. In addition, the inlet pipe 280 can also be connected to the water supply pipe 290, which is connected to the tap water pipe. A water supply control valve 291 is installed on the water supply pipe 290.

[0046] Understandably, the hydraulic module 200 is equipped with a refrigerant detection sensor 230, which can detect whether a refrigerant leak has occurred inside the hydraulic module 200; the hydraulic module 200 is also equipped with a third fan 220 that exhausts air from inside the hydraulic module 200 to the outdoor space, which can discharge the leaked refrigerant to the outside when a refrigerant leak is detected inside the hydraulic module 200; the hydraulic module 200 is also equipped with a second fan 210 that can blow air from the equipment room into the hydraulic module 200, thereby assisting in the detection of the refrigerant concentration in the equipment room; the equipment room is equipped with a first fan 300, which can be turned on when a high refrigerant concentration is detected in the equipment room, thereby discharging the leaked refrigerant from the room to the outside.

[0047] Reference Figure 3 A first aspect of the present invention provides a refrigerant leakage control method for a multi-split air conditioner with a hydraulic module 200, including but not limited to steps S310 to S320:

[0048] Step S310: Obtain the refrigerant concentration detected by the refrigerant detection sensor 230;

[0049] Step S320: Control the first fan 300, the second fan 210 and the third fan 220 according to the refrigerant concentration to reduce the impact of refrigerant leakage.

[0050] The refrigerant leakage control method for a multi-split air conditioner with a hydraulic module 200 provided in this embodiment of the invention controls the operation of the first fan 300, the second fan 210, and the third fan 220 by acquiring the refrigerant concentration detected by the refrigerant detection sensor 230. It can detect the refrigerant concentration inside the hydraulic module 200 and the refrigerant concentration between equipment, effectively deal with refrigerant leakage, reduce the impact of refrigerant leakage, eliminate the need for the forced ventilation device between equipment to be kept constantly on, and take into account energy consumption, thus achieving greater energy savings.

[0051] Reference Figure 4 In some embodiments of the refrigerant leakage control method provided by the present invention, step S320, which controls the first fan 300, the second fan 210, and the third fan 220 according to the refrigerant concentration, includes, but is not limited to, steps S410 to S430:

[0052] Step S410: When the refrigerant concentration is greater than the preset concentration, turn on the third fan 220 and continuously measure the refrigerant concentration and compare the refrigerant concentration with the preset concentration;

[0053] Step S420: When the refrigerant concentration is less than the preset concentration within the first preset time period, turn on the second fan 210 and continuously measure the refrigerant concentration and compare the refrigerant concentration with the preset concentration.

[0054] Step S430: When the refrigerant concentration exceeds the preset concentration again, turn on the first fan 300.

[0055] Understandably, when the refrigerant concentration exceeds the preset concentration, it indicates a refrigerant leak in the multi-split system, and the refrigerant concentration inside the hydraulic module 200 is high. At this point, the third fan 220 is activated to discharge the refrigerant inside the hydraulic module 200 to the outside, reducing the refrigerant concentration inside the hydraulic module 200. When the refrigerant concentration remains below the preset concentration for the first preset time period, meaning the third fan 220 has discharged most of the leaked refrigerant into the hydraulic module 200 to the outside, maintaining the refrigerant concentration inside the hydraulic module 200 at a low level, the second fan 210 is activated. The second fan 210 blows air from the equipment room into the hydraulic module 200 to detect the refrigerant level in the equipment room. If the refrigerant concentration does not exceed the preset concentration after turning on the second fan 210, it indicates that the refrigerant concentration in the equipment room is low. If the refrigerant concentration exceeds the preset concentration again after turning on the second fan 210, it indicates that the leaked refrigerant from the multi-split system has leaked into the equipment room, resulting in a high refrigerant concentration. In this case, turning on the first fan 300 will discharge the leaked refrigerant from the room to the outside, thereby quickly reducing the refrigerant concentration in the equipment room. The system can detect the refrigerant status inside the hydraulic module 200 and inside the equipment room, control the operation of different fans, and cooperate to discharge the leaked refrigerant to the outside, reducing the risk of refrigerant combustion and explosion, thus providing high safety.

[0056] In some embodiments of the refrigerant leakage control method provided by the present invention, after turning on the second fan 210 in step S420 or after turning on the first fan 300 in step S430:

[0057] When the refrigerant concentration is less than the preset concentration within the second preset time period, the first fan 300, the second fan 210 and the third fan 220 are turned off.

[0058] Understandably, when the refrigerant concentration is lower than the preset concentration within the second preset time period, it means that the refrigerant concentration inside the hydraulic module 200 and the equipment room has been kept at a low level for a period of time. Therefore, the leaked refrigerant has been cleared, and the first fan 300, the second fan 210 and the third fan 220 are turned off, which can take into account the energy consumption impact and save energy.

[0059] Reference Figure 1 In some embodiments of the refrigerant leakage control method provided by the present invention, an electric water valve 271 is provided on the outlet pipe 270 of the hydraulic module 200, and the refrigerant leakage control method further includes:

[0060] When the refrigerant concentration is greater than the preset concentration, close the electric water valve 271.

[0061] In this embodiment, to prevent leaked refrigerant from entering the room where the heating terminal is located along the outlet pipe 270 and posing a risk to the user, an electric water valve 271 is installed on the outlet pipe 270 of the hydraulic module 200. When the refrigerant concentration is greater than the preset concentration, the electric water valve 271 can be closed, thus cutting off the passage from the outlet pipe 270 to the user's room and reducing the safety risk.

[0062] Reference Figure 1 In some embodiments of the refrigerant leakage control method provided by the present invention, a main shut-off valve 170 is provided on the second refrigerant main pipe 150 that connects the outdoor unit 100 to both the indoor unit and the hydraulic module 200, and an electronic expansion valve D is provided on the refrigerant branch pipe connecting the outdoor unit 100 to the hydraulic module 200. The refrigerant leakage control method further includes:

[0063] When the refrigerant concentration is greater than the preset concentration, the main circuit shut-off valve 170 and the electronic expansion valve D are closed, and the compressor of the outdoor unit 100 is stopped.

[0064] In this embodiment, when the refrigerant concentration is greater than the preset concentration, that is, when a high refrigerant concentration is detected inside the hydraulic module 200, it is determined that there is a refrigerant leak in the hydraulic module 200. The outdoor unit 100 enters the refrigerant leak protection shutdown, that is, the compressor 110 of the outdoor unit 100 stops. The closing of the main circuit shut-off valve 170 and the electronic expansion valve D can cut off the refrigerant passage between the outdoor unit 100 and the hydraulic module 200, preventing the refrigerant on the outdoor unit 100 side from continuing to flow to the hydraulic module 200 for further leakage.

[0065] In the refrigerant leakage control method provided in some embodiments of the present invention, the above-mentioned control of the main circuit shut-off valve 170 and electronic expansion valve D closing when the refrigerant concentration is greater than the preset concentration, and the control of the compressor of the outdoor unit 100 stopping, includes the following steps:

[0066] Close the main circuit shut-off valve 170;

[0067] The compressor 110 of the outdoor unit 100 will be turned off after the timer reaches the third preset duration, or when the return gas pressure is lower than the preset pressure value.

[0068] Close the electronic expansion valve D.

[0069] It should be noted that when the multi-split system is operating in heating mode, the main circuit shut-off valve 170 is located on the high-pressure side of the refrigerant circulation loop. Therefore, the main circuit shut-off valve 170 is closed first, and the compressor 110 of the outdoor unit 100 continues to run, so that the refrigerant leaking from the hydraulic module 200 can be recovered to the outdoor unit 100. After the timer reaches the third preset time or the return gas pressure is lower than the preset pressure value, the compressor 110 of the outdoor unit 100 is shut off. Finally, the electronic expansion valve D is closed to cut off the refrigerant passage between the outdoor unit 100 and the hydraulic module 200, and the recovered refrigerant is sealed on one side of the outdoor unit 100.

[0070] In some embodiments of the refrigerant leakage control method provided by the present invention, the order of closing the main circuit shut-off valve 170 and closing the electronic expansion valve D is interchanged. That is, when the refrigerant concentration is greater than the preset concentration, the main circuit shut-off valve 170 and the electronic expansion valve D are closed, and the compressor of the outdoor unit 100 is stopped. The method includes the following steps:

[0071] Close the electronic expansion valve D;

[0072] The compressor 110 of the outdoor unit 100 will be turned off after the timer reaches the third preset duration, or when the return gas pressure is lower than the preset pressure value.

[0073] Close the main circuit shut-off valve 170.

[0074] Understandably, when the multi-split system is operating in cooling mode, the electronic expansion valve D is located on the high-pressure side of the refrigerant circulation loop. Therefore, the electronic expansion valve D is first closed, and the compressor of the outdoor unit 100 continues to run, thereby recovering the refrigerant from the hydraulic module 200 where refrigerant leakage occurs back to the outdoor unit 100. After the timer reaches the third preset duration or the return gas pressure is lower than the preset pressure value, the compressor 110 of the outdoor unit 100 is shut off. Finally, the main circuit shut-off valve 170 is closed to cut off the refrigerant passage between the outdoor unit 100 and the hydraulic module 200, and the recovered refrigerant is sealed on one side of the outdoor unit 100.

[0075] Below, to more clearly illustrate the refrigerant leakage control method of the present invention, in conjunction with... Figure 1 and Figure 5 A detailed description of a specific embodiment of this application will be provided.

[0076] Refrigerant leakage control methods are applied Figure 1 The multi-split system shown is for reference. Figure 5 The refrigerant leakage control method includes the following steps:

[0077] Step S510: When the refrigerant detection sensor 230 inside the hydraulic module 200 detects that the refrigerant concentration inside the hydraulic module 200 is greater than the preset concentration, it determines that there is a refrigerant leak in the multi-split unit and issues a refrigerant leak warning signal.

[0078] Step S520: Outdoor unit 100 performs refrigerant recovery operation and enters refrigerant leakage protection shutdown; wherein, the refrigerant recovery operation includes: first controlling the main circuit shut-off valve 170 to close, while the compressor 110 of outdoor unit 100 continues to run; after the timer reaches the third preset duration or the return gas pressure is lower than the preset pressure value, the compressor 110 of outdoor unit 100 is shut down, and finally the electronic expansion valve D is closed; or includes: first controlling the electronic expansion valve D to close, while the compressor 110 of outdoor unit 100 continues to run; after the timer reaches the third preset duration or the return gas pressure is lower than the preset pressure value, the compressor 110 of outdoor unit 100 is shut down, and finally the main circuit shut-off valve 170 is closed;

[0079] Step S530: Close the electric water valve 271 on the outlet pipe 270 of the hydraulic module 200 to prevent refrigerant from leaking into the room where the heating terminal is located; at this time, the refrigerant leaking into the water circuit of the hydraulic module 200 can be discharged into the hydraulic module 200 through the air vent valve 262 of the electric heating tank 260; control the third fan 220 to turn on and discharge the refrigerant inside the hydraulic module 200 to the outside;

[0080] Step S540: Continuously measure the refrigerant concentration and compare it with the preset concentration to determine whether the refrigerant concentration is lower than the preset concentration within 10 minutes. If not, it means that the refrigerant concentration inside the hydraulic module 200 is still high, and the current state is maintained and operation continues; if so, proceed to step S550 to detect refrigerant leakage between the equipment where the hydraulic module 200 is located.

[0081] Step S550: Control the third fan 220 to remain on and control the second fan 210 to turn on, thereby preventing the refrigerant leaking from the hydraulic module 200 from not being discharged in time and from possibly leaking into the equipment room where the hydraulic module 200 is located; continuously measure the refrigerant concentration and compare the refrigerant concentration with the preset concentration;

[0082] Step S560: Determine if the refrigerant concentration is lower than the preset concentration within 10 minutes. If yes, proceed to step S570; otherwise, proceed to step S580.

[0083] Step S570: The refrigerant that leaked into the hydraulic module 200 and between equipment rooms has been drained. Control the first fan 300, the second fan 210 and the third fan 220 to shut down, completing the handling of the refrigerant leak.

[0084] Step S580: Control the third fan 220 and the second fan 210 to keep them on, and control the first fan 300 to turn on, so as to reduce the refrigerant concentration between the equipment; then return to step S560 to make a judgment again.

[0085] The refrigerant leakage control method provided in this embodiment of the invention, by setting a second fan 210 and a third fan 220 in the hydraulic module 200 and linking them with the first fan 300 in the equipment room, can detect refrigerant leakage inside the hydraulic module 200 and in the equipment room, more accurately respond to different refrigerant leakage situations, reduce the impact of refrigerant leakage, and take into account energy consumption, thus achieving greater energy saving.

[0086] Reference Figure 6 A second aspect of the present invention provides an operation control device 600, including a memory 610, a processor 620, and a computer program stored in the memory 610 and executable on the processor 620. The processor 620 executes the program to implement the refrigerant leakage control method of the first aspect embodiment above, for example, by performing... Figure 3 Method steps S310 to S320, or execution Figure 4 Method steps S410 to S430, or execution Figure 5 Method steps S510 to S580.

[0087] In addition, a third aspect of the present invention provides a multi-unit air conditioner, including the operation control device 600 as described in the second aspect of the present invention.

[0088] Furthermore, a fourth aspect of the present invention provides a computer-readable storage medium storing computer-executable instructions for causing a computer to perform the refrigerant leakage control method of the first aspect embodiment above, for example, executing... Figure 3 Method steps S310 to S320, or execution Figure 4 Method steps S410 to S430, or execution Figure 5 Method steps S510 to S580.

[0089] It will be understood by those skilled in the art that all or some of the steps and systems in the methods disclosed above can be implemented as software, firmware, hardware, and suitable combinations thereof. Some or all of the physical components can be implemented as software executed by a processor, such as a central processing unit, digital signal processor, or microprocessor, or as hardware, or as an integrated circuit, such as an application-specific integrated circuit. Such software can be distributed on a computer-readable medium, which may include computer storage media or non-transitory media and communication media or transient media. As is known to those skilled in the art, the term computer storage media includes volatile and non-volatile, removable and non-removable media implemented in any method or technology for storing information such as computer-readable instructions, data structures, program modules, or other data. Computer storage media includes, but is not limited to, RAM, ROM, EEPROM, flash memory or other memory technologies, CD-ROM, digital versatile disc DVD or other optical disc storage, magnetic cartridges, magnetic tape, disk storage or other magnetic storage devices, or any other medium that can be used to store desired information and is accessible to a computer. Furthermore, as is known to those skilled in the art, communication media typically contain computer-readable instructions, data structures, program modules, or other data in modulated data signals such as carrier waves or other transmission mechanisms, and may include any information delivery medium.

[0090] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present invention.

Claims

1. A method for controlling refrigerant leakage in a multi-split air conditioner with a hydraulic module, characterized in that, The multi-split air conditioner includes an outdoor unit, several indoor units, and a hydraulic module installed in an equipment room. The equipment room is equipped with a first fan for exhausting air to the outdoor space. The hydraulic module is equipped with a second fan for blowing air from the equipment room into the hydraulic module, a third fan for exhausting air from the inside of the hydraulic module to the outdoor space, and a refrigerant detection sensor installed inside the hydraulic module. The method includes: Obtain the refrigerant concentration detected by the refrigerant detection sensor; The first fan, the second fan, and the third fan are controlled according to the refrigerant concentration to reduce the impact of refrigerant leakage; The step of controlling the first fan, the second fan, and the third fan according to the refrigerant concentration includes: When the refrigerant concentration is greater than the preset concentration, the third fan is turned on, and the refrigerant concentration is continuously measured and compared with the preset concentration; If the refrigerant concentration is less than the preset concentration for a first preset time period, the second fan is turned on, and the refrigerant concentration is continuously measured and compared with the preset concentration. When the refrigerant concentration exceeds the preset concentration again, the first fan is turned on.

2. The refrigerant leakage control method according to claim 1, characterized in that, After turning on the second fan or the first fan: If the refrigerant concentration is less than the preset concentration for a second preset time period, the first fan, the second fan, and the third fan are turned off.

3. The refrigerant leakage control method according to claim 1, characterized in that, An electric water valve is installed on the outlet pipe of the hydraulic module, and the method further includes: When the refrigerant concentration is greater than the preset concentration, the electric water valve is closed.

4. The refrigerant leakage control method according to claim 1, characterized in that, The outdoor unit is equipped with a main shut-off valve on the refrigerant main pipe connecting both the indoor unit and the hydraulic module, and an electronic expansion valve is equipped on the refrigerant branch pipe connecting the outdoor unit to the hydraulic module. The method further includes: When the refrigerant concentration is greater than the preset concentration, the main circuit shut-off valve and the electronic expansion valve are closed, and the compressor of the outdoor unit is stopped.

5. The refrigerant leakage control method according to claim 4, characterized in that, The control of closing the main circuit shut-off valve and the electronic expansion valve, and controlling the compressor of the outdoor unit to stop, includes: Close the main circuit shut-off valve; The compressor of the outdoor unit will be shut off after the timer reaches the third preset duration or when the return gas pressure is lower than the preset pressure value. Close the electronic expansion valve.

6. The refrigerant leakage control method according to claim 5, characterized in that, The order of closing the main shut-off valve and closing the electronic expansion valve is interchanged.

7. An operation control device, characterized in that, The device includes a memory, a processor, and a computer program stored in the memory and executable on the processor, the processor executing the program to implement the refrigerant leakage control method as described in any one of claims 1 to 6.

8. A multi-split air conditioner, characterized in that, Includes the operation control device as described in claim 7.

9. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores computer-executable instructions for causing a computer to perform the refrigerant leakage control method as described in any one of claims 1 to 6.

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