Control method of environment adjusting system, environment adjusting system and storage medium

Abstract

The invention discloses a control method of an environment adjusting system, the environment adjusting system and a storage medium, and relates to the technical field of environment adjusting systems.The method comprises the steps that a heat pump system is controlled to operate in a heating mode, in the heating mode, the second heat exchanger is in a heat release state, the first heat exchanger is in a heat absorption state, and a refrigerant flows to the second refrigerant valve from the first refrigerant valve; when the heat pump system runs to meet the defrosting condition, the first refrigerant valve is controlled to be closed, and the second refrigerant valve is controlled to be opened or maintained to be opened; when the first condition is met, the second refrigerant valve is controlled to be closed; the heat pump system is controlled to be switched to run in a defrosting mode; wherein in the defrosting mode, the second heat exchanger is in a heat absorption state, and the first heat exchanger is in a heat release state. The application aims to improve the indoor comfort, reliability and defrosting effect in the defrosting process of the heat pump system.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of environment regulation systems, in particular to a control method of an environment regulation system, the environment regulation system and a storage medium. BACKGROUND

[0002] Some environment regulation systems will adopt a heat pump system and a water circulation system in combination, and the heat pump system provides heat or cold to the water circulation system to regulate indoor environment. In the heating operation process of the heat pump system, frost will be formed on the outdoor heat exchanger, and the heat pump system generally needs to switch the refrigerant flow direction to make the outdoor heat exchanger heat and the indoor unit absorb heat, which is easy to cause the indoor temperature to drop significantly and affect the indoor comfort, and a large amount of compressor oil and refrigerant will be accumulated in the indoor unit, and the lubricating oil of the compressor and the circulating refrigerant will be insufficient in the defrosting process, which will cause reliability problems and affect the defrosting effect. SUMMARY

[0003] The main purpose of the present application is to provide a control method of an environment regulation system, the environment regulation system and a storage medium, which aims to improve the indoor comfort, reliability and defrosting effect in the defrosting process of the heat pump system.

[0004] To achieve the above purpose, the present application provides a control method of an environment regulation system, the environment regulation system comprising a heat pump system and a carrier refrigerant circulation system, the heat pump system comprising a first heat exchanger, a second heat exchanger, an indoor unit, a first refrigerant valve and a second refrigerant valve, the first refrigerant valve and the second refrigerant valve being respectively arranged on both sides of the indoor unit, the carrier refrigerant circulation system comprising a heat exchange module, the heat exchange module being in heat exchange connection with the second heat exchanger, and the method comprising:

[0005] controlling the heat pump system to operate in a heating mode, in which the second heat exchanger is in a heat releasing state and the first heat exchanger is in a heat absorbing state, and the refrigerant flows from the first refrigerant valve to the second refrigerant valve;

[0006] when the heat pump system operates to meet the defrosting condition, controlling the first refrigerant valve to be closed and the second refrigerant valve to be opened or maintained to be opened;

[0007] when the first condition is met, controlling the second refrigerant valve to be closed;

[0008] controlling the heat pump system to switch to a defrosting mode operation;

[0009] In the defrosting mode, the second heat exchanger is in a heat absorbing state and the first heat exchanger is in a heat releasing state.

[0010] In an embodiment, the heat pump system comprises at least two indoor units, each of the indoor units has a first side connected with a corresponding electronic expansion valve in series, the second side of the at least two indoor units is connected with a second refrigerant valve, the second refrigerant valve comprises the electronic expansion valves, the step of controlling the second refrigerant valve to open or maintain open comprises:

[0011] controlling all the electronic expansion valves to open or maintain open.

[0012] In an embodiment, the step of controlling the second refrigerant valve to close comprises:

[0013] controlling all the electronic expansion valves to close.

[0014] In an embodiment, the first condition comprises at least one of the following: the closing time of the second refrigerant valve reaches a first time length, the temperature of the coil of the indoor unit is lower than a preset temperature.

[0015] In an embodiment, after the step of controlling the second refrigerant valve to close, the method further comprises:

[0016] when the closing time of the second refrigerant valve reaches a second time length, controlling the heat pump system to switch to a defrosting mode.

[0017] In an embodiment, after the step of controlling the heat pump system to switch to the defrosting mode, the method further comprises:

[0018] when the heat pump system satisfies a defrosting exit condition, controlling the first refrigerant valve and the second refrigerant valve to restore the state before the heat pump system enters the defrosting mode, controlling the heat pump system to run in the heating mode, and controlling the heat transfer medium circulation system to restore the state before the heat pump system enters the defrosting mode.

[0019] In an embodiment, the heat transfer medium circulation system further comprises a gas device and an indoor terminal device, after the steps of controlling the first refrigerant valve and the second refrigerant valve to restore the state before the heat pump system enters the defrosting mode, and controlling the heat pump system to run in the heating mode, the method further comprises:

[0020] acquiring a characteristic temperature of the heat transfer medium in the heat transfer medium circulation system and / or an exhaust temperature of a compressor in the heat pump system;

[0021] when a preset condition is satisfied, controlling the gas device to restore the state before the heat pump system enters the defrosting mode;

[0022] The preset condition includes at least one of the following: the feature temperature is greater than a preset temperature, a temperature difference between the feature temperature and a target temperature of the secondary refrigerant in the defrosting mode of the secondary refrigerant circulation system is greater than a preset value, and the exhaust temperature is greater than a preset exhaust temperature.

[0023] In an embodiment, the heat pump system includes at least two indoor units, the secondary refrigerant circulation system includes at least two indoor terminal devices and at least two sub-regulation modules, the indoor terminal devices are arranged one-to-one with the sub-regulation modules, and the sub-regulation modules are arranged to regulate the flow of secondary refrigerant in the corresponding indoor terminal devices. After the step of controlling the heat pump system to run in the heating mode, the method further includes:

[0024] When the heat pump system runs to meet the defrosting condition, the sub-regulation module corresponding to the indoor terminal device in the indoor space where the currently started indoor unit is located is controlled to be turned on, or all sub-regulation modules are controlled to be turned on, or the sub-regulation module meeting the target condition is controlled to be turned on.

[0025] The target condition includes that the temperature of the indoor space where the corresponding indoor terminal device is located is higher than the corresponding set temperature.

[0026] In an embodiment, the step of controlling the heat pump system to switch to the defrosting mode includes:

[0027] Controlling a reversing component in the heat pump system to switch from a first operating state to a second operating state.

[0028] The first operating state corresponds to the exhaust port of the compressor of the heat pump system being in communication with the second heat exchanger and the gas return port of the compressor being in communication with the first heat exchanger, and the second operating state corresponds to the exhaust port being in communication with the first heat exchanger and the gas return port being in communication with the second heat exchanger.

[0029] In an embodiment, the secondary refrigerant circulation system further includes a gas device and an indoor terminal device, and after the step of controlling the heat pump system to run in the heating mode, the method further includes:

[0030] When the heat pump system runs to meet the defrosting condition, the gas device is controlled to be turned on to supplement heat for the indoor terminal device.

[0031] In an embodiment, after the step of controlling the gas device to be turned on to supplement heat for the indoor terminal device, the method further includes:

[0032] Controlling the gas device to run according to a target outlet temperature of the gas device, the target outlet temperature being greater than a reference temperature.

[0033] And / or, detecting the current coolant temperature of the coolant circulation system, and controlling the gas equipment operation according to the coolant temperature and a target coolant temperature.

[0034] In addition, to achieve the above object, the present application also provides an environment conditioning system, which comprises a control device, a heat pump system and a coolant circulation system, the heat pump system comprises a first heat exchanger, a second heat exchanger, an indoor unit, a first refrigerant valve and a second refrigerant valve, the first refrigerant valve and the second refrigerant valve are respectively arranged on two sides of the indoor unit, the coolant circulation system comprises a heat exchange module, the heat exchange module is in heat exchange connection with the second heat exchanger, and the heat pump system and the coolant circulation system are connected with the control device.

[0035] The control device comprises a memory, a processor and a computer program stored on the memory and executable on the processor, and the computer program is configured to implement the steps of the control method of the environment conditioning system.

[0036] In addition, to achieve the above object, the present application also provides a storage medium, which is a computer readable storage medium, and the storage medium stores a computer program, and the computer program is executed by a processor to implement the steps of the control method of the environment conditioning system.

[0037] The one or more technical solutions provided by the present application have at least the following technical effects: based on the environment conditioning system provided with the heat pump system and the coolant circulation system, when the first heat exchanger needs to be defrosted during the heat pump system operating in the heating mode, the first refrigerant valve and the second refrigerant valve are opened in sequence, so that the refrigerant and the compressor oil in the indoor unit can be reduced, in this way, the cold output of the indoor unit during the defrosting process can be effectively reduced to reduce the temperature fluctuation of the indoor space during the defrosting process, and the excessive refrigerant and compressor oil in the indoor unit during the defrosting process can be effectively avoided to ensure sufficient refrigerant and oil return to improve the defrosting effect and system operation stability, thereby improving the indoor comfort and the reliability and defrosting effect of the heat pump system during the defrosting process. In this way, the heat pump system first discharges the refrigerant and the compressor oil in the indoor unit, and then switches to the defrosting operation, which can effectively reduce the abnormal sound generated by the refrigerant impact on the indoor side during the switching defrosting process. BRIEF DESCRIPTION OF DRAWINGS

[0038] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and serve to explain the principles of the present application together with the specification.

[0039] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the accompanying drawings needed to be used in the embodiments or prior art description will be briefly introduced as follows. Obviously, the drawings can also provide other drawings based on these drawings for those ordinarily skilled in the art without any creative effort.

[0040] Figure 1 Fig. 1 is a structural schematic diagram of an environment conditioning system in an embodiment of the present application;

[0041] Figure 2 Fig. 2 is a device structural schematic diagram of a hardware running environment related to a control method of the environment conditioning system in the embodiment of the present application;

[0042] Figure 3 Fig. 3 is a flow schematic diagram of an embodiment one of the control method of the environment conditioning system of the present application;

[0043] Figure 4 Fig. 4 is a flow schematic diagram of an embodiment two of the control method of the environment conditioning system of the present application.

[0044] The purposes, functional features and advantages of the present application will be further explained in combination with the embodiments and with reference to the drawings. DETAILED DESCRIPTION

[0045] It should be understood that the specific embodiments described herein are merely intended to explain the technical solutions of the present application, and not to limit the present application.

[0046] In order to better understand the technical solutions of the present application, the following will be described in detail in combination with the drawings in the specification and specific embodiments.

[0047] The main solution of the embodiment of the present application is that a control method is proposed based on an environment conditioning system, the environment conditioning system includes a heat pump system and a cold carrier circulation system, the heat pump system includes a first heat exchanger, a second heat exchanger, an indoor unit, a first refrigerant valve and a second refrigerant valve, the first refrigerant valve and the second refrigerant valve are respectively arranged on both sides of the indoor unit, the cold carrier circulation system includes a heat exchange module, the heat exchange module is in heat exchange connection with the second heat exchanger, and the method includes: controlling the heat pump system to run in a heating mode, in the heating mode, the second heat exchanger is in a heat releasing state and the first heat exchanger is in a heat absorbing state, and refrigerant flows from the first refrigerant valve to the second refrigerant valve; when the heat pump system runs to meet defrosting conditions, the first refrigerant valve is controlled to be closed, and the second refrigerant valve is controlled to be opened or maintained to be opened; when a first condition is met, the second refrigerant valve is controlled to be closed; the heat pump system is controlled to be switched to a defrosting mode; and in the defrosting mode, the second heat exchanger is in a heat absorbing state and the first heat exchanger is in a heat releasing state.

[0048] In this embodiment, for ease of description, the environmental control system will be used as the implementing entity for the following description.

[0049] In existing technologies, the outdoor heat exchanger of a heat pump system will frost up during heating operation. Defrosting the outdoor heat exchanger generally requires switching the refrigerant flow so that the outdoor heat exchanger releases heat and the indoor unit absorbs heat. This can easily cause a significant drop in indoor temperature, affecting indoor comfort. In addition, a large amount of compressor oil and refrigerant will accumulate in the indoor unit. During the defrosting process, insufficient lubricating oil and circulating refrigerant in the compressor can lead to reliability issues and affect the defrosting effect.

[0050] This application provides the above-mentioned solution. When the first heat exchanger needs to be defrosted during the heating mode operation of the heat pump system, the first and second refrigerant valves are opened sequentially. This reduces the amount of refrigerant and compressor oil in the indoor unit. This method not only effectively reduces the cooling output of the indoor unit during defrosting, thus reducing temperature fluctuations in the indoor space, but also effectively avoids excessive refrigerant and compressor oil in the indoor unit during defrosting. It ensures sufficient refrigerant and oil return to improve the defrosting effect and system operational stability, thereby improving indoor comfort while enhancing the reliability and defrosting effect of the heat pump system. Furthermore, by first discharging the refrigerant and compressor oil from the indoor unit before switching to defrosting operation, the abnormal noise generated by refrigerant surge on the indoor side during the defrosting process is effectively reduced.

[0051] It should be noted that the executing entity in this embodiment can be a computing service device with data processing, network communication, and program execution functions, such as a tablet computer, personal computer, or mobile phone, or an electronic device or environmental control system capable of performing the above functions. The following description uses an environmental control system as an example to illustrate this embodiment and the subsequent embodiments.

[0052] In this embodiment of the invention, an environmental control system is provided. (Refer to...) Figure 1 The environmental control system includes a heat pump system 100 and a refrigerant circulation system 200, with the heat pump system 100 and the refrigerant circulation system 200 connected for heat exchange.

[0053] The heat pump system 100 includes a compressor, a reversing assembly, a first heat exchanger, a throttling device, and a second heat exchanger. The first heat exchanger, the throttling device, and the second heat exchanger are connected in sequence. The compressor's exhaust port, compressor return port, the first heat exchanger, and the second heat exchanger are all connected to the reversing assembly. The heat pump system 100 also includes an indoor unit 11, a first refrigerant valve, and a second refrigerant valve. The flow path of the second heat exchanger, or the flow path of the second heat exchanger and the throttling device, is connected in parallel with the indoor unit 11. The first refrigerant valve and the second refrigerant valve are respectively located on both sides of the indoor unit 11. The first refrigerant valve and the second refrigerant valve can be used to regulate the refrigerant flow in one or more indoor units 11 to which they are connected. In this embodiment, the indoor unit 11 includes a third heat exchanger and an electronic expansion valve 121. The flow path of the third heat exchanger and the electronic expansion valve 121 is connected in parallel with the flow path of the second heat exchanger and the throttling device. The refrigerant regulating module 12 is located in the branch where the second heat exchanger is located and controls the refrigerant flow to the third heat exchanger or prevents the refrigerant flow to the third heat exchanger.

[0054] In this embodiment, the heat pump system 100 includes at least two indoor units 11, each including an indoor heat exchanger and a corresponding indoor fan. Different indoor units 11 are located in different indoor spaces. Each indoor unit 11 can be associated with at least one indoor terminal device 22, and the indoor unit 11 and its associated indoor terminal device 22 are located in the same indoor space.

[0055] In this embodiment, the first heat exchanger is located in an outdoor environment.

[0056] The indoor unit 11 includes a third heat exchanger, which is connected in parallel with the second heat exchanger. A first refrigerant valve and / or a second refrigerant valve are located in the branch where the second heat exchanger is located and control the flow of refrigerant to the third heat exchanger or prevent the flow of refrigerant to the third heat exchanger.

[0057] The reversing assembly has a first operating state and a second operating state. When the reversing assembly is operating in the first operating state, the compressor's exhaust port is connected to the indoor unit 11 and / or the second heat exchanger, and the compressor's return port is connected to the first heat exchanger; when the reversing assembly is operating in the second operating state, the compressor's exhaust port is connected to the first heat exchanger, and the compressor's return port is connected to the indoor unit 11 and / or the second heat exchanger.

[0058] When the reversing assembly is running in the first operating state, the refrigerant discharged by the compressor flows sequentially through the indoor unit 11 and / or the second heat exchanger, the throttling device, and the first heat exchanger before returning to the compressor. The indoor unit 11 and / or the second heat exchanger is in a heat release state, the first heat exchanger is in a heat absorption state, and the heat pump system 100 can be in a heating mode, etc.

[0059] When the reversing assembly is running in the second operating state, the refrigerant discharged by the compressor flows sequentially through the first heat exchanger, the throttling device, the indoor unit 11 and / or the second heat exchanger and then flows back to the compressor. The first heat exchanger is in a heat release state, and the indoor unit 11 and / or the second heat exchanger is in a heat absorption state. The heat pump system 100 can be in a cooling mode or a defrosting mode, etc.

[0060] The refrigerant circulation system 200 includes a heat exchange module, a gas appliance 21, and an indoor terminal device 22. A fluid circulation module may be installed in the refrigerant circulation system 200 to drive the flow of refrigerant in the system.

[0061] The refrigerant circulation system 200 is filled with refrigerant, which can flow within it. In this embodiment, the refrigerant is water. In other embodiments, the refrigerant may also be an aqueous solution of sodium chloride or calcium chloride salt, or an aqueous solution of an organic compound such as ethylene glycol or glycerol, etc.

[0062] The heat exchange module is connected to the second heat exchanger for heat exchange. When the refrigerant flows through the heat exchange module, it can exchange heat with the refrigerant in the second heat exchanger. In this embodiment, the environmental control system includes a hydraulic module 400, which includes the heat exchange module and the second heat exchanger. When the second heat exchanger is in a heat-releasing state, the refrigerant can be heated after flowing through the heat exchange module; when the second heat exchanger is in a heat-absorbing state, the refrigerant can be cooled after flowing through the heat exchange module.

[0063] Indoor terminal equipment 22 regulates the indoor environment by utilizing the cooling or heating output of a flowing refrigerant. Indoor terminal equipment 22 includes convection heat exchange devices (e.g., fan coil units) or radiant terminal devices (e.g., radiators, underfloor heating). The convection heat exchange device includes a heat exchanger and a corresponding fan. The number of indoor terminal devices 22 may be one or more, and more than one indoor terminal device 22 may be installed in different indoor spaces. The types of indoor terminal devices 22 in different indoor spaces may be the same or different. When the number of indoor terminal devices 22 is more than one, each indoor space may be equipped with one or more types of indoor terminal devices 22. Alternatively, when the number of indoor terminal devices 22 is more than one, the more than one indoor terminal device 22 may be connected in parallel. For example, the environmental control system may be configured to regulate at least two indoor spaces, each equipped with a radiant terminal device, or each indoor space equipped with both a convection heat exchange device and a radiant terminal device, or each indoor space equipped with only a convection heat exchange device.

[0064] The gas appliance 21 can heat the refrigerant flowing through it by burning gas. The gas appliance 21 can be a gas water heater or a gas wall-hung boiler, etc.

[0065] Reference Figure 1In one implementation, the refrigerant circulation system 200 includes a first circulation branch 202 and a second circulation branch 203. The first circulation branch 202 and the second circulation branch 203 are connected for heat exchange. The heat exchange module and the indoor terminal device 22 are located in the first circulation branch 202, and the gas device 21 is located in the second circulation branch 203. The first circulation branch 202 includes a first circulation pump, and the second circulation branch 203 includes a second circulation pump. Specifically, the first circulation branch 202 and the second circulation branch 203 are connected for heat exchange through a first heat exchange device 201. The first circulation pump drives the refrigerant to circulate between the heat exchange module, the indoor terminal device 22, and the first heat exchange device 201. Specifically, the first circulation pump in the first circulation branch 202 drives the refrigerant to flow sequentially from the heat exchange module to the first heat exchange device 201 and the indoor terminal device 22, and then back to the heat exchange module. The second circulation pump drives the refrigerant to circulate between the gas device 21 and the first heat exchange device 201. The first circulation pump may include a first sub-circulation pump located between the heat exchange module and the first heat exchange device 201 and a second sub-circulation pump located between the first heat exchange device 201 and the indoor terminal device 22.

[0066] The first heat exchange device 201 can be a mixing device, such as a coupling tank, a small buffer tank, or a water pipe assembly. The first heat exchange device 201 includes a first mixing chamber. In the first circulation branch 202, the heat exchange module, the first mixing chamber, and the indoor terminal device 22 are sequentially connected. Both ends of the refrigerant flow path in the gas appliance 21 of the second circulation branch 203 are connected to the first mixing chamber. Alternatively, the first heat exchange device 201 includes a first heat exchange channel and a second heat exchange channel that are independent yet heat-connected. In the first circulation branch 202, the heat exchange module, the first heat exchange channel, and the indoor terminal device 22 are sequentially connected. Both ends of the refrigerant flow path in the gas appliance 21 of the second circulation branch 203 are respectively connected to both ends of the second heat exchange channel.

[0067] In another implementation, the refrigerant circulation system 200 includes a third circulation branch, a fourth circulation branch, and a fifth circulation branch. These three circulation branches are all connected via heat exchange. The heat exchange module is located in the third circulation branch, the gas appliance 21 is located in the fourth circulation branch, and the indoor terminal device 22 is located in the fifth circulation branch. The third circulation branch includes a third circulation pump, the fourth circulation branch includes a fourth circulation pump, and the fifth circulation branch includes a fifth circulation pump. The third, fourth, and fifth circulation branches are connected via a second heat exchange device. The third circulation pump drives the refrigerant to circulate between the heat exchange module and the second heat exchange device; the fourth circulation pump drives the refrigerant to circulate between the gas appliance 21 and the second heat exchange device; and the fifth circulation pump drives the refrigerant to circulate between the indoor terminal device 22 and the second heat exchange device. Alternatively, the third circulation branch and the fourth circulation branch, as well as the fourth circulation branch and the fifth circulation branch, are connected via different heat exchange devices.

[0068] The second heat exchange device can be a mixing device, such as a buffer tank. The second heat exchange device includes a second mixing chamber, with both ends of the heat exchange module in the third circulation branch connected to the second mixing chamber, both ends of the refrigerant flow path in the gas equipment 21 in the fourth circulation branch connected to the second mixing chamber, and both ends of the indoor terminal equipment 22 in the fifth circulation branch connected to the second mixing chamber. Alternatively, the first heat exchange device 201 includes a third, fourth, and fifth heat exchange channel that are independent yet heat-connected. Both ends of the heat exchange module in the third circulation branch are connected to both ends of the third heat exchange channel, both ends of the refrigerant flow path in the gas equipment 21 in the fourth circulation branch are connected to both ends of the fourth heat exchange channel, and both ends of the indoor terminal equipment 22 in the fifth circulation branch are connected to both ends of the fifth heat exchange channel.

[0069] In another implementation, the heat exchange module, gas equipment 21 and indoor terminal equipment 22 are connected in sequence in the same circulation loop, and a sixth circulation pump can be set in the circulation branch to drive the flow of refrigerant.

[0070] Based on the above settings, the operating modes of the environmental control system should include at least the following:

[0071] In the first temperature control mode, the heat pump system 100 operates in heating mode, the gas equipment 21 is turned on, and the refrigerant in the refrigerant circulation system 200 absorbs the heat from the second heat exchanger and the gas equipment 21 respectively. When the refrigerant flows to the indoor terminal equipment 22, it can release heat to the space where it is located.

[0072] In the second temperature control mode, the heat pump system 100 operates in cooling mode, the gas equipment 21 is turned off, the refrigerant can absorb the cold energy in the second heat exchanger, and when the refrigerant flows to the indoor terminal equipment 22, it releases the cold energy into the space where it is located.

[0073] In the third temperature control mode, the heat pump system 100 is turned off, the gas appliance 21 is turned on, the refrigerant can absorb the heat in the gas appliance 21, and when the refrigerant flows to the indoor terminal device 22, it can release heat to the space where it is located.

[0074] In defrosting mode, the heat pump system 100 operates in defrosting mode, the gas appliance 21 is turned on, and the refrigerant can absorb the cold energy in the second heat exchanger and the heat energy in the gas appliance 21 respectively. The heating capacity of the gas appliance 21 is greater than or equal to the cold energy released by the second heat exchanger. When the refrigerant flows to the indoor terminal device 22, it can exchange heat with the indoor space.

[0075] Furthermore, refer to Figure 1 The refrigerant circulation system 200 also includes a fluid regulation module 23, which regulates the flow of refrigerant in at least two indoor terminal devices 22. Specifically, the fluid regulation module 23 can control the inflow or outflow of refrigerant into each indoor terminal device 22. The fluid regulation module 23 includes at least two sub-regulation modules, each corresponding to one of the indoor terminal devices 22. Each sub-regulation module can be configured to control the flow rate of refrigerant in its corresponding indoor terminal device 22. When a sub-regulation module is open, refrigerant is allowed to flow into the corresponding indoor terminal device 22; when the sub-regulation module is closed, refrigerant flow into the corresponding indoor terminal device 22 is stopped. In this embodiment, the fluid regulation module 23 is a manifold, and the sub-regulation modules are the distribution valves in the staged manifold.

[0076] Furthermore, based on any of the above embodiments, refer to Figure 1 In one embodiment, each indoor space regulated by the environmental control system may be equipped with a wired controller 300. The heat pump system 100 may include an outdoor unit. The aforementioned first heat exchanger, outdoor heat exchanger, and compressor may be located in the outdoor unit. The outdoor unit, circulation pump, gas equipment 21, fluid regulation module 23, and wired controller 300 may be connected via signal lines. The wired controller 300 in each indoor space is correspondingly bound to the indoor terminal device 22 in its space and the sub-regulation module connected to the indoor terminal device 22. The wired controller 300 may control at least one of the following: the liquid supply temperature of the sub-regulation module, circulation pump, gas equipment 21, and fluid regulation module 23, the ambient temperature of the indoor space, etc.

[0077] Furthermore, based on any of the above embodiments, in one embodiment, indoor units 11 are configured in a one-to-one correspondence with electronic expansion valves 121. Each indoor unit 11 is connected in series with its corresponding electronic expansion valve 121. The electronic expansion valve 121 can be used to regulate the refrigerant flow in the corresponding indoor unit 11.

[0078] The electronic expansion valve 121 is located on the first side of the corresponding indoor unit 11.

[0079] At least two indoor units 11 are provided with a first control valve 122 (e.g., a gas valve) on their second side. The first control valve 122 can be used to adjust the overall refrigerant quantity of the at least two indoor units 11.

[0080] In this embodiment, the first refrigerant valve includes a first control valve 122, and the second refrigerant valve includes an electronic expansion valve 121.

[0081] In other embodiments, a first control valve 22 (e.g., a gas valve) and a second control valve (e.g., a liquid valve) are respectively provided on both sides of at least two indoor units 11. The first refrigerant valve includes a first control valve 122, and the second refrigerant valve includes a second control valve.

[0082] Furthermore, based on any of the above embodiments, in one embodiment, referring to Figure 2 The environmental control system may also include a temperature detection module 01, which is located in the refrigerant circulation system 200 to detect the temperature of the refrigerant in the system. In this embodiment, the installation location of the temperature detection module 01 includes at least one of the following: between the liquid supply port of the fluid control module 23 and the liquid inlet of the indoor terminal device 22, between the liquid return port of the fluid control module 23 and the liquid outlet of the indoor terminal device 22, on the liquid supply side of the heat exchange module, on the liquid return side of the heat exchange module, etc.

[0083] Furthermore, based on any of the above embodiments, in one embodiment, referring to Figure 2 The environmental control system also includes a temperature sensor 02, which is located on the exhaust side of the compressor.

[0084] Furthermore, refer to Figure 2 The environmental control system may also include a control device 1, with a refrigerant circulation system 200 and a heat pump system 100 both connected to the control device 1. A temperature detection module 01 and a temperature sensor 02 are both connected to the control device 1. The control device 1 includes: at least one processor 1001; and a memory 1002 communicatively connected to the at least one processor 1001, as well as a timer 1003, etc.; wherein the memory 1002 stores instructions executable by the at least one processor 1001, which, when executed by the at least one processor 1001, enable the at least one processor 1001 to perform the control method of the environmental control system in the following embodiments.

[0085] In this embodiment of the invention, the control device 1 can be a wireless control device or a wired control device. Figure 3 The control device 1 shown is merely an example and should not be construed as limiting the functionality or scope of the embodiments of this application. Control device 1 may be an integrated control module or may include at least two separate controllers. Control device 1 may include wired controllers 300 in various indoor spaces regulated by an environmental control system.

[0086] like Figure 2 As shown, the control device 1 may include a processor 1001 (e.g., a central processing unit), which can perform various appropriate actions and processes according to a program stored in a memory 1002. The program in the memory 1002 may be a program in read-only memory (ROM) or a program loaded from a storage device into random access memory (RAM). The RAM also stores various programs and data required for the operation of the control device 1. The processor 1001 and the memory 1002 (ROM and RAM) are interconnected via a bus. An input / output (I / O) interface is also connected to the bus. Typically, the following systems can be connected to the I / O interface: input devices including, for example, touchscreens, touchpads, keyboards, mice, image sensors, microphones, accelerometers, gyroscopes, etc.; output devices including, for example, liquid crystal displays (LCDs), speakers, vibrators, etc.; storage devices including, for example, magnetic tapes, hard disks, etc.; and communication devices. The communication device allows the control device 1 to communicate wirelessly or wiredly with other devices to exchange data. Although the figure shows a control device 1 with various hardware, it should be understood that it is not required to implement or have all of the hardware shown, and more or less hardware may be implemented instead.

[0087] Specifically, according to the embodiments disclosed in this application, the processes described above with reference to the flowcharts can be implemented as computer software programs. For example, embodiments disclosed in this application include a computer program product comprising a computer program carried on a computer-readable medium, the computer program containing program code for performing the methods shown in the flowcharts. In such embodiments, the computer program can be downloaded and installed from a network via a communication device, or installed from memory 1002. When the computer program is executed by processor 1001, it performs the functions defined in the methods of the embodiments disclosed in this application.

[0088] The environmental control system provided in this application, employing the control method of the environmental control system in the following embodiments, can effectively improve indoor comfort, reliability, and defrosting effect during the defrosting process of the heat pump system. Compared with the prior art, the beneficial effects of the environmental control system provided in this application are the same as the beneficial effects of the control method of the environmental control system provided in the following embodiments, and other technical features of this environmental control system are the same as those disclosed in the method of the following embodiments, and will not be repeated here.

[0089] It should be understood that the various parts disclosed in this application can be implemented using hardware, software, firmware, or a combination thereof. In the description of the above embodiments, specific features, structures, materials, or characteristics can be combined in any suitable manner in one or more embodiments or examples.

[0090] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

[0091] Based on this, embodiments of this application provide a control method for an environmental control system, referring to... Figure 3 , Figure 3 This is a flowchart illustrating the first embodiment of the control method for the environmental control system of this application.

[0092] In this embodiment, the control method of the environmental control system includes steps S10 to S40:

[0093] Step S10: Control the heat pump system to operate in heating mode. In the heating mode, the second heat exchanger is in a heat release state and the first heat exchanger is in a heat absorption state, and the refrigerant flows from the first refrigerant valve to the second refrigerant valve.

[0094] During the heating mode operation of the heat pump system, the refrigerant discharged from the compressor flows sequentially through the second heat exchanger and indoor unit, the throttling device, and the first heat exchanger before returning to the compressor. Both the second heat exchanger and the indoor unit are in a heat-releasing state, while the first heat exchanger is in a heat-absorbing state. During this process, the refrigerant in the refrigerant circulation system circulates, absorbing heat released by the second heat exchanger as it flows through the heat exchange modules before flowing to the indoor terminal devices. When the indoor terminal devices and / or indoor units in the space requiring heating are turned on, they release heat into their respective spaces. The first heat exchanger is located in the outdoor environment; if the outdoor temperature is too low, frost may form on the first heat exchanger. The refrigerant flows through the branch circuit containing the indoor unit, sequentially passing through the first refrigerant valve, the indoor unit, and the second refrigerant valve.

[0095] When the indoor terminal equipment includes a radiant terminal device, the corresponding sub-regulation module is activated during the activation of the radiant terminal device, allowing the refrigerant to circulate between the radiant terminal device and the heat exchange module; during the deactivation of the radiant terminal device, the corresponding sub-regulation module is deactivated, and the refrigerant flowing out of the heat exchange module stops flowing into the radiant terminal device. When the indoor terminal equipment includes a convection heat exchange device, the fan in the convection heat exchange device is activated during the activation of the convection heat exchange device, allowing the refrigerant to circulate between the convection heat exchange device and the heat exchange module; during the deactivation of the convection heat exchange device, the fan in the convection heat exchange device is deactivated.

[0096] During the indoor unit startup process, both the first and second refrigerant valves at both ends are open and the fan in the indoor unit is on.

[0097] During the heating process of a heat pump system, the gas equipment can be turned on or off. Turning on the gas equipment can be in response to user commands, or when the operating status of the heat pump system and / or environmental parameters and / or the refrigerant in the refrigerant circulation system meet the heat replenishment conditions, etc.

[0098] Step S20: When the heat pump system operates to the point where the defrosting conditions are met, control the first refrigerant valve to close and control the second refrigerant valve to open or remain open.

[0099] Defrosting conditions specifically refer to the conditions that the operating parameters of the heat pump system itself (such as the temperature of the first heat exchanger) and / or the environmental parameters of the environment where the environmental control system is located (such as the outdoor ambient temperature) must meet when the first heat exchanger needs to defrost. For example, defrosting conditions include the temperature of the first heat exchanger being lower than a first temperature threshold and / or the outdoor ambient temperature being lower than a second temperature threshold, and so on.

[0100] When the heat pump system operates to the point where the defrosting conditions are met, if the second refrigerant valve is in the closed state, the second refrigerant valve can be controlled to open; if the second refrigerant valve is in the open state, the second refrigerant valve can be controlled to remain open.

[0101] When the heat pump system reaches the defrosting condition, the indoor fan in the currently running indoor unit will be turned off.

[0102] Step S30: When the first condition is met, control the second refrigerant valve to close;

[0103] The first condition indicates that the amount of refrigerant discharged by the indoor unit and the amount of compressor oil meet the requirements for defrosting effect and reliability during the defrosting process.

[0104] In this embodiment, the first condition includes at least one of the following: the first refrigerant valve is closed for a first duration, and the coil temperature of the indoor unit is lower than a preset temperature.

[0105] The first condition can be a pre-set fixed condition, or it can be a condition determined according to the actual operating state of the environmental control system. For example, the first condition can be determined based on the current frost thickness of the first heat exchanger and / or the current refrigerant temperature of the refrigerant circulation system and / or the number of indoor units currently turned on, etc. (such as the first duration or preset temperature in the first condition mentioned above). In this embodiment, the first duration ranges from [5s, 60s], for example, 25s.

[0106] In this embodiment, during the execution of steps S20 and S30, the compressor in the heat pump system remains on. After the first refrigerant control valve is closed, the refrigerant circulating in the heat pump system no longer flows into the indoor unit. Driven by the pressure difference, the refrigerant and the compressor oil carried in the indoor unit flow out of the indoor unit to participate in normal circulation. The compressor oil can flow back into the compressor to lubricate the compressor and ensure its operational reliability. The refrigerant can circulate between the first heat exchanger, the second heat exchanger, and the compressor. When there is enough refrigerant and compressor oil discharged from the indoor unit, the second refrigerant valve is closed to block the flow of refrigerant and compressor oil in the indoor unit, so as to prevent the refrigerant carrying cold energy from flowing into the indoor unit and the compressor oil from accumulating in the indoor unit during the subsequent defrosting process.

[0107] Step S40: Control the heat pump system to switch to defrost mode, wherein in the defrost mode, the second heat exchanger is in heat absorption state and the first heat exchanger is in heat release state.

[0108] When the defrosting mode is activated during the heating operation of the heat pump system, the reversing assembly switches from the first operating state to the second operating state. During the defrosting operation of the heat pump system, the refrigerant flowing out of the compressor flows sequentially through the first heat exchanger, the throttling device, and the second heat exchanger before returning to the compressor. The first heat exchanger releases heat to melt the frost, and the second heat exchanger can absorb heat from the refrigerant circulation system for defrosting and to ensure normal heat exchange circulation of the system. The heat absorbed by the second heat exchanger may include the heat stored in the refrigerant circulation system during the heating operation of the heat pump system, or the heat provided when the gas appliances are turned on.

[0109] This embodiment provides a control method for an environmental control system. When the first heat exchanger needs to be defrosted during the heating mode of a heat pump system, the method controls the first and second refrigerant valves to open sequentially. This reduces the amount of refrigerant and compressor oil in the indoor unit. This not only effectively reduces the cooling output of the indoor unit during defrosting, thus reducing temperature fluctuations in the indoor space, but also effectively prevents excessive refrigerant and compressor oil in the indoor unit during defrosting. It ensures sufficient refrigerant and oil return to improve defrosting efficiency and system stability, thereby enhancing indoor comfort while improving the reliability and defrosting effect of the heat pump system. Furthermore, by first discharging the refrigerant and compressor oil from the indoor unit before switching to defrosting operation, the abnormal noise generated by refrigerant surges on the indoor side during the defrosting process is effectively reduced.

[0110] In one feasible implementation, the heat pump system includes at least two indoor units, each indoor unit having a corresponding electronic expansion valve connected in series on its first side, a first refrigerant valve located on the second side of each of the at least two indoor units, and a second refrigerant valve including the electronic expansion valve. Then:

[0111] The step of controlling the second refrigerant valve to open or remain open includes: controlling the electronic expansion valve connected in series with the currently powered-on indoor unit to remain open, and controlling the electronic expansion valve connected in series with the currently unpowered indoor unit to open. The step of controlling the second refrigerant valve to close includes: controlling all the electronic expansion valves to close.

[0112] "Not powered on" here can include being powered off or in standby mode.

[0113] In the heating mode, the electronic expansion valve connected in series with the indoor unit that is not turned on operates at the standby opening, which is a very small opening. When the heat pump system runs to meet the defrosting conditions, the electronic expansion valve connected in series with the indoor unit that is not turned on increases its opening to the first target opening. The electronic expansion valve connected in series with the indoor unit that is turned on can maintain the current opening or operate at the second target opening.

[0114] The first target opening degree and the second target opening degree can be preset fixed opening degrees, such as the maximum opening degree, etc., or the first target opening degree and the second target opening degree can also be opening degrees determined according to the actual operation of the environmental control system. For example, the first target opening degree and the second target opening degree can be determined according to the operating time of the indoor unit that is turned on and / or the ratio of the number of indoor units that are turned on to the number of indoor units that are not turned on, etc.

[0115] In this embodiment, by using the above method, the refrigerant and compressor oil discharged from the indoor unit that is turned on can be prevented from entering other indoor units that are not turned on due to pressure difference, thus affecting the system's oil return and refrigerant circulation. Based on this, the system's operational reliability and defrosting effect during the defrosting process can be further improved.

[0116] In other embodiments, the electronic expansion valve connected in series with the indoor unit that is turned on can be kept open, while the electronic expansion valve connected in series with the indoor unit that is not turned on can be kept in standby mode or kept closed. When the first condition is met, in addition to controlling all electronic expansion valves to close, the electronic expansion valve connected in series with the currently turned-on indoor unit can also be controlled to close. Alternatively, in other embodiments, a first control valve (e.g., a gas valve) and a second control valve (e.g., a liquid valve) are respectively provided on both sides of at least two indoor units. The first refrigerant valve includes the first control valve, and the second refrigerant valve includes the second control valve.

[0117] Furthermore, in one embodiment, after the step of controlling the second refrigerant valve to close, the method further includes: when the closing time of the second refrigerant valve reaches a second duration, controlling the heat pump system to switch to defrost mode operation.

[0118] The second duration can be a pre-set fixed duration, or it can be a duration determined based on the actual operation of the heat pump system. For example, the second duration can be determined based on the operating frequency of the compressor and the temperature of the second heat exchanger in the heat pump system, and so on.

[0119] In this embodiment, the second duration ranges from [5s, 60s], for example, 25s.

[0120] In this embodiment, the above method helps to further improve the stability of system operation and ensure a smooth switching of defrosting mode.

[0121] In other embodiments, the second duration may also include a period in which the difference between the pressure difference of the commutation components in the heat pump system and a preset pressure difference is less than a preset value.

[0122] Based on any of the above embodiments, in the second embodiment of this application, the same or similar content as the above embodiments can be referred to the above description, and will not be repeated hereafter. In addition, after the step of controlling the heat pump system to switch to defrost mode operation, the method further includes:

[0123] When the heat pump system meets the defrost exit conditions, the first refrigerant valve and the second refrigerant valve are controlled to return to the state before the heat pump system entered the defrost mode, the heat pump system is controlled to run in the heating mode, and the refrigerant circulation system is controlled to return to the state before the heat pump system entered the defrost mode.

[0124] The defrosting exit condition is specifically defined as the conditions that the operating parameters of the heat pump system itself and / or the environmental parameters of the environment where the first heat exchanger is located must meet when defrosting of the first heat exchanger is completed. The temperature of the first heat exchanger is greater than or equal to a second temperature threshold, and the second temperature threshold is greater than the first temperature threshold mentioned above.

[0125] The system can either open the first refrigerant valve first, followed by the second refrigerant valve, or open both valves simultaneously.

[0126] In this embodiment, the above method helps to improve the matching degree between the comfort of each space and the actual needs of the user after defrosting.

[0127] Furthermore, in this embodiment, referring to Figure 4 The refrigerant circulation system includes indoor terminal equipment and gas equipment. The steps of controlling the first refrigerant valve and the second refrigerant valve to restore the heat pump system to the state before entering the defrost mode, controlling the heat pump system to operate in the heating mode, and controlling the refrigerant circulation system to restore the heat pump system to the state before entering the defrost mode include: Step S501, controlling the first refrigerant valve and the second refrigerant valve to restore the heat pump system to the state before entering the defrost mode, and controlling the heat pump system to operate in the heating mode; here, controlling the heat pump system to operate in the heating mode includes controlling the reversing component to switch from the second operating state to the first operating state.

[0128] Step S502: Obtain the characteristic temperature of the refrigerant in the refrigerant circulation system and / or the exhaust temperature of the compressor in the heat pump system;

[0129] The characteristic temperature may include at least one of the following: the liquid inlet temperature of the heat exchange module, the liquid outlet temperature of the heat exchange module, the liquid supply temperature of the fluid regulation module, the liquid return temperature of the fluid regulation module, the liquid inlet temperature of the indoor terminal device, and the liquid outlet temperature of the indoor terminal device; wherein, the fluid regulation module is configured to be connected to at least two of the indoor terminal devices to regulate the refrigerant flow rate of each of the indoor terminal devices.

[0130] In this embodiment, the characteristic temperature is the liquid supply temperature of the fluid regulation module.

[0131] The exhaust temperature is detected by a temperature sensor installed on the exhaust side of the compressor.

[0132] Step S503: When the preset conditions are met, control the gas equipment to restore the heat pump system to the state before entering the defrosting mode.

[0133] The preset conditions include at least one of the following: the characteristic temperature is greater than the preset temperature, the temperature difference between the characteristic temperature and the target refrigerant temperature of the refrigerant circulation system in the defrosting mode is greater than the preset value, and the exhaust temperature is greater than the preset exhaust temperature.

[0134] The preset conditions indicate that there is no risk of freezing in the refrigerant circulation system. The preset conditions can be fixed conditions set in advance, or conditions determined according to the actual operating status of the environmental control system. For example, the preset conditions can be determined based on the running time of the defrost mode and / or the initial temperature of the refrigerant in the refrigerant circulation system when entering the defrost mode and / or the temperature change of the refrigerant when the gas equipment is running at a preset heating amount after entering the defrost mode, etc.

[0135] In this embodiment, by means of the above method, when defrosting needs to be stopped, the normal heating cycle of the refrigerant in the indoor unit is first restored. On this basis, normal heating is restored only when there is enough heat in the environmental control system by setting preset conditions. This ensures that the gas equipment will only resume its original control when the refrigerant temperature is high enough after defrosting is completed, thus ensuring that the temperature of the indoor terminal equipment is high enough to improve indoor comfort after defrosting is completed.

[0136] Based on any of the above embodiments, in the third embodiment of this application, the same or similar content as the above embodiments can be referred to the above description, and will not be repeated hereafter. On this basis, the heat pump system includes at least two indoor units, and the refrigerant circulation system includes at least two indoor terminal devices and at least two sub-regulation modules. The indoor terminal devices and the sub-regulation modules are configured to correspond one-to-one. The sub-regulation modules are configured to regulate the refrigerant flow rate in the corresponding indoor terminal devices. After the step of controlling the heat pump system to operate in heating mode, the system further includes:

[0137] When the heat pump system operates to the point where the defrosting conditions are met, the sub-regulation module corresponding to the indoor terminal device in the indoor space where the currently powered-on indoor unit is located is turned on, or all sub-regulation modules are turned on, or the sub-regulation module that meets the target conditions is turned on.

[0138] The target condition includes that the temperature of the indoor space where the corresponding indoor terminal device is located is higher than the corresponding set temperature.

[0139] In this embodiment, the indoor terminal device includes a radiant terminal device. When the sub-regulation module is turned on, the radiant terminal device releases heat; when the sub-regulation module is turned off, the radiant terminal device stops releasing heat.

[0140] The set temperature is specifically the target value that the ambient temperature of the indoor terminal device needs to reach.

[0141] In this embodiment, while keeping the sub-regulation module corresponding to the indoor terminal device in the space where the currently powered-on indoor unit is located on, the sub-regulation module corresponding to the indoor terminal device in the space where the currently powered-off indoor unit is located is kept off or operates at a standby level. While keeping sub-regulation modules that meet the target conditions on, the sub-regulation modules that do not meet the target conditions off are controlled to turn off.

[0142] In other implementations of this embodiment, during the process of controlling the activation of the sub-regulation module corresponding to the indoor terminal device in the space where the currently powered-on indoor unit is located, the sub-regulation module corresponding to the indoor terminal device in the space where the currently powered-off indoor unit is located can be activated according to a target number. Here, the target number can be determined based on at least one of the following: the temperature difference between the ambient temperature and the corresponding set temperature of all indoor spaces with heating needs, the initial temperature of the refrigerant in the heat exchange module when entering defrosting mode, and the operating power of the gas equipment.

[0143] When the heat pump system exits defrost mode, all sub-regulation modules operate in the state before the heat pump system entered defrost mode.

[0144] In this embodiment, the steps related to the sub-regulation module control are performed before the refrigerant regulation module blocks the refrigerant from flowing into the indoor unit. Optionally, this is performed before the step of the compressor operating at a frequency less than or equal to a preset frequency.

[0145] In this embodiment, during the defrosting process of the heat pump system, the sub-regulation modules of the space where the currently active indoor unit is located remain active, or the sub-regulation modules corresponding to the indoor terminal devices with heating needs are activated. This helps to ensure the comfort of users in the indoor space with heating needs without affecting users in other spaces. The activation of all sub-regulation modules during the defrosting process increases the amount of refrigerant circulating in the refrigerant circulation system, further ensuring the stability of the refrigerant temperature flowing out of the heat exchange module and preventing it from becoming too low, thus further reducing temperature fluctuations in the indoor space with heating needs. Controlling the activation of sub-regulation modules that meet the target conditions during the defrosting process helps to utilize excess heat in that space to improve the defrosting efficiency of the heat pump system while simultaneously adjusting the indoor space to a state that meets user comfort requirements.

[0146] Based on any of the above embodiments, in the fourth embodiment of this application, the same or similar content as the above embodiments can be referred to the above description, and will not be repeated hereafter. In addition, the refrigerant circulation system further includes a gas appliance and an indoor terminal device. After the step of controlling the heat pump system to operate in heating mode, the system further includes: when the heat pump system operates to the point where defrosting conditions are met, controlling the gas appliance to turn on to supplement heat to the indoor terminal device.

[0147] Here, "gas appliance on" includes maintaining the gas appliance in an on state or switching it from an off state to an on state. The heating control parameters when the gas appliance is on can be preset fixed parameters, such as controlling the gas appliance operation according to the maximum heating power or maximum outlet water temperature; alternatively, the heating control parameters when the gas appliance is on can also be determined based on the actual operating status of the refrigerant circulation system and / or environmental conditions. When the gas appliance is maintained in an on state, the heating output can be increased by controlling the gas appliance.

[0148] In this embodiment, the gas appliance is turned on to supplement heat to the indoor terminal unit before the refrigerant regulation module is controlled to operate and reduce the refrigerant in the indoor unit. In other embodiments, the gas appliance can also be turned on to supplement heat to the indoor terminal unit after the heat pump system switches to defrost mode.

[0149] During the period from when the heat pump system reaches the defrost condition until it reaches the defrost exit condition, the gas equipment can remain on.

[0150] In this embodiment, the above method helps the indoor terminal equipment maintain heat delivery to its space during the defrosting process of the heat pump system, reducing the temperature drop in the indoor space while providing the heat required for defrosting of the heat pump system, thereby ensuring the defrosting effect and improving indoor comfort.

[0151] In other embodiments, the gas appliances may also be shut down when the heat pump system meets the defrosting conditions.

[0152] In this embodiment, after the step of controlling the gas equipment to turn on to supplement the heat of the indoor terminal equipment, the method further includes: controlling the operation of the gas equipment according to the target liquid outlet temperature of the gas equipment, wherein the target liquid outlet temperature is greater than the reference temperature; and / or, detecting the current refrigerant temperature of the refrigerant circulation system, and controlling the operation of the gas equipment according to the refrigerant temperature and the target refrigerant temperature.

[0153] In one implementation, the gas-fired equipment is controlled to start and its operation is controlled by a target outlet liquid temperature. After the heat pump system switches to defrost mode, the current refrigerant temperature of the refrigerant circulation system is detected, and the gas-fired equipment is controlled to operate based on the refrigerant temperature and the target refrigerant temperature until the heat pump system exits defrost mode.

[0154] The target outlet temperature here specifically refers to the target temperature that the refrigerant flowing out of the refrigerant flow path in the gas-fired equipment needs to reach. Optionally, the target outlet temperature can be in the range of [35℃, 80℃], for example, the target outlet temperature can be 60℃.

[0155] The reference temperature is specifically 50% of the maximum outlet liquid temperature of the gas appliance. A target outlet liquid temperature greater than the reference temperature indicates that the gas appliance is outputting high heating capacity in defrosting mode. The target outlet liquid temperature can be a preset fixed temperature, such as the maximum outlet liquid temperature; or, the target outlet liquid temperature can be a temperature determined based on the actual operating conditions of the environmental control system, such as the temperature of the first heat exchanger and / or the temperature of the second heat exchanger and / or the temperature difference between the ambient temperature of the currently activated indoor terminal equipment and the set temperature, and / or the outdoor ambient temperature.

[0156] In this embodiment, the heating capacity of the gas equipment can be increased, maintained, or decreased based on the actual and target outlet temperatures. Optionally, heating capacity adjustment parameters for the gas equipment can be determined based on the actual and target outlet temperatures, and the operation of the gas equipment can be controlled according to these parameters.

[0157] The refrigerant temperature includes at least one of the following: the inlet temperature of the heat exchange module, the outlet temperature of the heat exchange module, the supply temperature of the fluid regulating module, the return temperature of the fluid regulating module, the inlet temperature of the indoor terminal device, and the outlet temperature of the indoor terminal device; wherein, the fluid regulating module is configured to be connected to at least two of the indoor terminal devices to regulate the refrigerant flow rate of each of the indoor terminal devices.

[0158] The supply temperature of the fluid regulating module is specifically the total supply temperature of the refrigerant flowing from the fluid regulating module to at least two indoor terminal devices, and the return temperature of the fluid regulating module is the total return temperature of the refrigerant flowing from at least two indoor terminal devices back to the fluid regulating module. In this embodiment, the fluid regulating module is a manifold.

[0159] In this embodiment, the refrigerant temperature is the supply temperature of the fluid conditioning module.

[0160] The target refrigerant temperature is the desired temperature that the refrigerant in the refrigerant circulation system must reach during the operation of the gas-fired equipment. The target refrigerant temperature is lower than the aforementioned target outlet temperature. The target refrigerant temperature can vary depending on the detection location. The target refrigerant temperature can be a pre-set fixed temperature or a temperature determined based on the actual operating conditions of the environmental control system.

[0161] The heating capacity of the gas equipment is controlled by the magnitude or quantitative relationship (such as difference or ratio) between the refrigerant temperature and the target refrigerant temperature.

[0162] In this embodiment, when the refrigerant temperature is lower than the target refrigerant temperature, the gas equipment is controlled to increase the heating amount; when the refrigerant temperature is greater than or equal to the target refrigerant temperature, the gas equipment is controlled to reduce the heating amount or maintain the current state of operation.

[0163] Controlling the heating capacity of a gas appliance to increase its heating capacity may include at least one of the following: controlling the gas appliance to increase the opening of the gas proportional valve to increase the amount of gas in the combustion chamber; controlling the gas appliance to increase the number of ignited burners; or controlling the gas appliance to increase the amount of air in the combustion chamber. Controlling the heating capacity of a gas appliance to decrease its heating capacity may include at least one of the following: controlling the gas appliance to increase the opening of the gas proportional valve to decrease the amount of gas in the combustion chamber; controlling the gas appliance to decrease the number of ignited burners; or controlling the gas appliance to decrease the amount of air in the combustion chamber.

[0164] Among them, the operating parameter adjustment values ​​during the process of increasing or decreasing the heating capacity of the gas equipment can be fixed parameters set in advance, or values ​​determined according to the actual operating conditions of the environmental control system. For example, the operating parameter adjustment values ​​can be determined according to the temperature difference between the refrigerant temperature and the target refrigerant temperature and / or the temperature change value of the first heat exchanger within a preset time and / or the frost thickness of the first heat exchanger when the defrosting mode is activated, etc.

[0165] In this embodiment, during the initial stage of the defrosting mode, the gas equipment is controlled to operate based on a higher target liquid outlet temperature. This helps ensure that the gas equipment can output sufficient heat to guarantee defrosting efficiency while reducing indoor temperature fluctuations. During the continuous operation stage of the defrosting mode, the gas equipment is controlled in combination with the refrigerant temperature and the target refrigerant temperature. This helps ensure that the refrigerant in the refrigerant circulation system can accurately reach the target refrigerant temperature, further reducing indoor temperature fluctuations and improving indoor environmental temperature comfort.

[0166] In other implementations of this embodiment, after the heat pump system meets the defrosting conditions and starts the gas equipment, it can also maintain the operation of the gas equipment based on the target liquid outlet temperature or based on the current refrigerant temperature and the target refrigerant temperature, thereby ensuring that the gas equipment can provide sufficient heat to reduce indoor temperature fluctuations during the defrosting process.

[0167] It should be noted that the above examples are only for understanding this application and do not constitute a limitation on the control method of the environmental control system of this application. Any simple modifications based on this technical concept are within the protection scope of this application.

[0168] This application provides a computer-readable storage medium having computer-readable program instructions (i.e., a computer program) stored thereon, the computer-readable program instructions being used to execute the control method of the environmental control system in the above embodiments.

[0169] The computer-readable storage medium provided in this application may be, for example, a USB flash drive, but is not limited to, electrical, magnetic, optical, electromagnetic, infrared, or semiconductor systems, devices, or any combination thereof. More specific examples of computer-readable storage media may include, but are not limited to: electrical connections having one or more wires, portable computer disks, hard disks, random access memory (RAM), read-only memory (ROM), erasable programmable read-only memory (EPROM or flash memory), optical fiber, portable compact disk read-only memory (CD-ROM), optical storage devices, magnetic storage devices, or any suitable combination thereof. In this embodiment, the computer-readable storage medium may be any tangible medium containing or storing a program that can be used by or in conjunction with an instruction execution system, system, or device. The program code contained on the computer-readable storage medium may be transmitted using any suitable medium, including but not limited to: wires, optical cables, RF (Radio Frequency), etc., or any suitable combination thereof.

[0170] The aforementioned computer-readable storage medium may be included in the environmental control system; or it may exist independently and not be assembled into the environmental control system.

[0171] The aforementioned computer-readable storage medium carries one or more programs that, when executed by the environmental control system, cause the environmental control system to perform the following process: controlling the heat pump system to operate in a heating mode, wherein the second heat exchanger is in a heat-releasing state and the first heat exchanger is in a heat-absorbing state, and refrigerant flows from the first refrigerant valve to the second refrigerant valve; when the heat pump system operates to the point where defrosting conditions are met, controlling the first refrigerant valve to close, and controlling the second refrigerant valve to open or remain open; when a first condition is met, controlling the second refrigerant valve to close; controlling the heat pump system to switch to defrosting mode operation; wherein, in the defrosting mode, the second heat exchanger is in a heat-absorbing state and the first heat exchanger is in a heat-releasing state.

[0172] Computer program code for performing the operations of this application can be written in one or more programming languages ​​or a combination thereof, including object-oriented programming languages ​​such as Java, Smalltalk, and C++, and conventional procedural programming languages ​​such as the "C" language or similar programming languages. The program code can be executed entirely on the user's computer, partially on the user's computer, as a standalone software package, partially on the user's computer and partially on a remote computer, or entirely on a remote computer or server. In cases involving remote computers, the remote computer can be connected to the user's computer via any type of network—including a Local Area Network (LAN) or a Wide Area Network (WAN)—or can be connected to an external computer (e.g., via the Internet using an Internet service provider).

[0173] The readable storage medium provided in this application is a computer-readable storage medium that stores computer-readable program instructions (i.e., a computer program) for executing the control method of the above-described environmental conditioning system, which can improve indoor comfort, reliability, and defrosting effect during the defrosting process of the heat pump system. Compared with the prior art, the beneficial effects of the computer-readable storage medium provided in this application are the same as the beneficial effects of the control method of the environmental conditioning system provided in the above embodiments, and will not be repeated here.

[0174] The flowcharts and block diagrams in the accompanying drawings illustrate the architecture, functionality, and operation of possible implementations of systems, methods, and computer program products according to various embodiments of this application. In this regard, each block in a flowchart or block diagram may represent a module, segment, or portion of code containing one or more executable instructions for implementing a specified logical function. It should also be noted that in some alternative implementations, the functions indicated in the blocks may occur in a different order than those indicated in the drawings. For example, two consecutively indicated blocks may actually be executed substantially in parallel, and they may sometimes be executed in reverse order, depending on the functions involved. It should also be noted that each block in the block diagrams and / or flowcharts, and combinations of blocks in the block diagrams and / or flowcharts, can be implemented using a dedicated hardware-based system that performs the specified function or operation, or using a combination of dedicated hardware and computer instructions.

[0175] It should be understood that the various parts disclosed in this application can be implemented using hardware, software, firmware, or a combination thereof. Modules described in the embodiments of this application can be implemented in software or hardware. The names of modules do not necessarily limit the specific unit itself. In the description of the above embodiments, specific features, structures, materials, or characteristics can be combined in any suitable manner in one or more embodiments or examples.

[0176] The above descriptions are merely some embodiments of this application and do not limit the patent scope of this application. Any equivalent structural transformations made based on the technical concept of this application and the content of this specification and drawings, or direct / indirect applications in other related technical fields, are included within the patent protection scope of this application. Therefore, the protection scope of this application should be determined by the scope of the claims.

Claims

1. A control method of an environmental conditioning system, characterized by, The environment adjusting system comprises a heat pump system and a cold carrier circulation system, the heat pump system comprises a first heat exchanger, a second heat exchanger, an indoor unit, a first refrigerant valve and a second refrigerant valve, the first refrigerant valve and the second refrigerant valve are respectively arranged on two sides of the indoor unit, the cold carrier circulation system comprises a heat exchange module, the heat exchange module is in heat exchange connection with the second heat exchanger, and the method comprises the following steps: controlling the heat pump system to run in a heating mode, in the heating mode, the second heat exchanger is in an exothermic state and the first heat exchanger is in an endothermic state, and refrigerant flows from the first refrigerant valve to the second refrigerant valve; when the heat pump system runs to meet defrosting conditions, controlling the first refrigerant valve to be closed and the second refrigerant valve to be opened or maintained open; when a first condition is met, controlling the second refrigerant valve to be closed; controlling the heat pump system to switch to a defrosting mode; in the defrosting mode, the second heat exchanger is in an endothermic state and the first heat exchanger is in an exothermic state.

2. The method of claim 1, wherein, The heat pump system comprises at least two indoor units, a corresponding electronic expansion valve is connected in series on the first side of each indoor unit, the first refrigerant valve is arranged on the second side of the at least two indoor units, the second refrigerant valve comprises the electronic expansion valve, and the step of controlling the second refrigerant valve to be opened or maintained open comprises: controlling all the electronic expansion valves to be opened or maintained open.

3. The method of claim 2, wherein, The step of controlling the second refrigerant valve to be closed comprises: controlling all the electronic expansion valves to be closed.

4. The method of claim 1, wherein, The first condition comprises at least one of the following: the first refrigerant valve is closed for a first time length, and the coil temperature of the indoor unit is lower than a preset temperature.

5. The method of claim 1, wherein, After the step of controlling the second refrigerant valve to be closed, the method further comprises: when the second refrigerant valve is closed for a second time length, controlling the heat pump system to switch to the defrosting mode.

6. The method of claim 1, wherein, After the step of controlling the heat pump system to switch to the defrosting mode, the method further comprises: when the heat pump system meets defrosting exit conditions, controlling the first refrigerant valve and the second refrigerant valve to return to a state before the heat pump system enters the defrosting mode, controlling the heat pump system to run in the heating mode, and controlling the cold carrier circulation system to return to a state before the heat pump system enters the defrosting mode.

7. The method of claim 6, wherein, The cold carrier circulation system further comprises a gas device and an indoor terminal device, and after the step of controlling the first refrigerant valve and the second refrigerant valve to return to the state before the heat pump system enters the defrosting mode and controlling the heat pump system to run in the heating mode, the method further comprises: obtaining a characteristic temperature of a cold carrier in the cold carrier circulation system and / or an exhaust temperature of a compressor in the heat pump system; when a preset condition is met, controlling the gas device to return to the state before the heat pump system enters the defrosting mode; wherein the preset condition comprises at least one of the following: the characteristic temperature is greater than a preset temperature, a temperature difference between the characteristic temperature and a target cold carrier temperature of the cold carrier circulation system in the defrosting mode is greater than a preset value, and the exhaust temperature is greater than a preset exhaust temperature.

8. The method of claim 1, wherein, The heat pump system comprises at least two indoor units, the cold carrier circulation system comprises at least two indoor terminal devices and at least two sub-regulation modules, the indoor terminal devices are arranged one by one with the sub-regulation modules, the sub-regulation modules are arranged to regulate the flow of the cold carrier in the corresponding indoor terminal device, and the step of controlling the heat pump system to run in the heating mode further comprises: When the heat pump system runs to meet the defrosting condition, the sub-regulation module corresponding to the indoor terminal device in the indoor space where the currently started indoor unit is located is controlled to be turned on, or all sub-regulation modules are controlled to be turned on, or the sub-regulation module meeting the target condition is controlled to be turned on. The target condition comprises that the temperature of the indoor space where the corresponding indoor terminal device is located is higher than the corresponding set temperature.

9. The method of any one of claims 1 to 8, wherein, The step of controlling the heat pump system to switch to the defrosting mode comprises: Controlling the reversing component in the heat pump system to switch from a first running state to a second running state. The exhaust port of the compressor of the heat pump system corresponding to the first running state is in communication with the second heat exchanger, and the gas inlet of the compressor is in communication with the first heat exchanger, and the exhaust port of the compressor corresponding to the second running state is in communication with the first heat exchanger, and the gas inlet of the compressor is in communication with the second heat exchanger.

10. The method of any one of claims 1 to 8, wherein, The cold carrier circulation system further comprises a gas device and an indoor terminal device, and the step of controlling the heat pump system to run in the heating mode further comprises: When the heat pump system runs to meet the defrosting condition, the gas device is controlled to be turned on to supplement heat for the indoor terminal device.

11. The method of claim 10, wherein, The step of controlling the gas device to be turned on to supplement heat for the indoor terminal device further comprises: Controlling the gas device to run according to the target outlet temperature of the gas device, the target outlet temperature being greater than a reference temperature. And / or, detecting the current cold carrier temperature of the cold carrier circulation system, and controlling the gas device to run according to the cold carrier temperature and a target cold carrier temperature.

12. An environmental conditioning system characterized by, The environment regulation system comprises a control device, a heat pump system and a cold carrier circulation system, the heat pump system comprises a first heat exchanger, a second heat exchanger, an indoor unit, a first refrigerant valve and a second refrigerant valve, the first refrigerant valve and the second refrigerant valve are arranged on both sides of the indoor unit respectively, the cold carrier circulation system comprises a heat exchange module, the heat exchange module is in heat exchange connection with the second heat exchanger, and the heat pump system and the cold carrier circulation system are connected with the control device. The control device comprises a memory, a processor and a computer program stored on the memory and executable on the processor, and the computer program is configured to implement the steps of the control method of the environment regulation system according to any one of claims 1 to 11.

13. A storage medium, characterized by The storage medium is a computer readable storage medium, and the storage medium stores a computer program, and the computer program is executed by the processor to implement the steps of the control method of the environment regulation system according to any one of claims 1 to 11.

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