Flow path adjusting method and device of indoor heat exchanger and storage medium

Abstract

The invention relates to the technical field of heating ventilation air conditioners, and discloses a flow path adjusting method and device of an indoor heat exchanger and a storage medium, and the method comprises the steps of detecting a current operation mode, and controlling a first heat exchanger, a second heat exchanger, an adjusting expansion valve and a heat exchange branch to operate according to the current operation mode; the current indoor temperature is obtained, the temperature difference value between the current indoor temperature and the set target temperature is calculated, and the current load state of the current operation mode is determined according to the temperature difference value; the operation number of heat exchange branches is detected; and in the current operation mode, the opening degree of the expansion valve is adjusted according to the current load state and the operation number, and the corresponding heat exchange branches are controlled to be connected or disconnected. A refrigerant flow path in the indoor heat exchanger is changed, the heat exchange area of the indoor heat exchanger is adjusted, different load requirements in different operation modes are met, loads are accurately regulated and controlled, and indoor temperature fluctuation caused by frequent starting and stopping of a compressor is avoided.

Description

Technical Field

[0001] The present invention relates to the technical field of heating, ventilation and air conditioning, and in particular to a flow path regulating method and device, and a storage medium for an indoor heat exchanger. Background Art

[0002] The indoor heat exchanger flow path of existing air conditioners for household and commercial use generally adopts a fixed mode, which has certain limitations when the air conditioner is in operation. Specifically, when the air conditioner needs to cope with high-load cooling demand, this fixed-flow heat exchanger can better meet the cooling supply. However, when the air conditioner needs to cope with low-load cooling demand, the heat exchange area of ​​the indoor heat exchanger is relatively large, resulting in excessive cooling, frequent start and stop of the compressor, and indoor temperature fluctuations, affecting comfort and heat exchange efficiency. Summary of the invention

[0003] The purpose of the present invention is to provide a flow regulation method and device, and a storage medium for an indoor heat exchanger to solve one or more technical problems existing in the prior art and at least provide a beneficial choice or create conditions.

[0004] The solution of the present invention to solve the technical problem is to provide a flow path adjustment method and equipment, and a storage medium for an indoor heat exchanger.

[0005] An embodiment of one aspect of the present invention provides a flow path regulating method of an indoor heat exchanger, wherein the indoor heat exchanger comprises: a first heat exchanger, a second heat exchanger, a regulating expansion valve and a heat exchange branch;

[0006] One end of the first heat exchanger and one end of the second heat exchanger are connected to an external outdoor unit, the other end of the second heat exchanger is connected to one end of the regulating expansion valve through the heat exchange branch, the other end of the first heat exchanger is connected to the other end of the regulating expansion valve, and the heat exchange branch is provided with at least two paths;

[0007] The method comprises:

[0008] Detecting a current operation mode, and controlling the operation of the first heat exchanger, the second heat exchanger, the regulating expansion valve, and the heat exchange branch according to the current operation mode;

[0009] Acquiring a current indoor temperature, calculating a temperature difference between the current indoor temperature and a set target temperature, and determining a current load state of the current operating mode according to the temperature difference;

[0010] Detecting the operating quantity of the heat exchange branch;

[0011] In the current operation mode, the opening of the regulating expansion valve is adjusted according to the current load state and the operation quantity, and the corresponding heat exchange branch is controlled to be turned on or off.

[0012] Further, determining the current load state of the current operation mode according to the temperature difference includes:

[0013] When the temperature difference is less than the set first threshold, it is considered that in the current operation mode, the current load state is in a state of low load;

[0014] When the temperature difference is greater than the set second threshold, it is considered that in the current operation mode, the current load state is in a state of excessive load;

[0015] The set first threshold is equal to or less than the set second threshold, and the current operation mode includes a cooling mode and a heating mode.

[0016] Further, when the current operation mode is the heating mode, adjusting the opening of the regulating expansion valve according to the current load state and the operation quantity, and controlling the corresponding heat exchange branch to be turned on or off includes:

[0017] In the heating mode, when it is determined that the current load state is the underload state, controlling the opening of the regulating expansion valve to be maintained in a fully open state;

[0018] When the running number is greater than the set number, at least two of the heat exchange branches are cut off at the same time, and the running is maintained for the set time period;

[0019] After a set time period has passed, detecting whether the current load state is the overload state;

[0020] If so, the opening of the regulating expansion valve is reduced, the first heat exchanger is controlled to operate in a cooling state, and the second heat exchanger is controlled to maintain operation in a heating state.

[0021] Further, when the current operation mode is the heating mode, adjusting the opening of the regulating expansion valve according to the current load state and the operation quantity, and controlling the corresponding heat exchange branch to be turned on or off includes:

[0022] In the heating mode, when it is determined that the current load state is the underload state, controlling the opening of the regulating expansion valve to be maintained in a fully open state;

[0023] When the number of the operation paths is two, one of the heat exchange paths is turned on, the other heat exchange path is turned off, and the operation is maintained for the set time period;

[0024] After a set time period has passed, detecting whether the current load state is the overload state;

[0025] If so, the opening of the regulating expansion valve is reduced to control the first heat exchanger to operate in a cooling state, and the two heat exchange branches are connected to control the second heat exchanger to maintain operation in a heating state.

[0026] Further, when the current operation mode is the cooling mode, adjusting the opening of the regulating expansion valve according to the current load state and the operation quantity, and controlling the corresponding heat exchange branch to be turned on or off includes:

[0027] In the cooling mode, when it is determined that the current load state is the underload state, reducing the opening of the regulating expansion valve;

[0028] When the running quantity is greater than the set quantity, at least two of the heat exchange branches are cut off simultaneously.

[0029] Further, when the current operation mode is the cooling mode, adjusting the opening of the regulating expansion valve according to the current load state and the operation quantity, and controlling the corresponding heat exchange branch to be turned on or off includes:

[0030] In the cooling mode, when it is determined that the current load state is the underload state, reducing the opening of the regulating expansion valve;

[0031] When the number of operations is two, one of the heat exchange branches is turned on and the other heat exchange branch is turned off.

[0032] Further, the current operation mode includes a dehumidification mode; and the method further includes:

[0033] Obtaining the current indoor humidity, and in the dehumidification mode, determining whether the current indoor humidity reaches the set target humidity;

[0034] If so, it is considered that the dehumidification demand is small, the opening of the regulating expansion valve is reduced, and according to the running quantity, the corresponding heat exchange branch is controlled to be cut off so that the current indoor humidity is maintained at the set target humidity.

[0035] Further, controlling the corresponding heat exchange branch to be cut off according to the running quantity includes:

[0036] In the dehumidification mode, when the number of operations is two, one of the heat exchange branches is turned on and the other heat exchange branch is turned off.

[0037] In another aspect of the present invention, there is provided a computer device comprising:

[0038] a memory storing a computer program;

[0039] A processor, wherein when the processor executes the computer program, the flow path regulating method of the indoor heat exchanger as described in one aspect of the present invention is implemented.

[0040] In another embodiment of the present invention, a storage medium is provided, on which a computer program is stored, and when the computer program is executed by a processor, the flow path regulating method of the indoor heat exchanger as described in one aspect of the present invention is implemented.

[0041] The beneficial effects of the present invention are as follows: an indoor heat exchanger is composed of a first heat exchanger and a second heat exchanger, and at least two heat exchange branches are arranged to connect the first heat exchanger and the second heat exchanger, and the load change is determined according to the temperature difference. In the corresponding operating mode, the expansion valve and the corresponding heat exchange branch are regulated according to the load change and the operating number of the heat exchange branches, the refrigerant flow path inside the indoor heat exchanger is changed, the heat exchange area of ​​the indoor heat exchanger is adjusted, and the different functions of the heat exchanger are changed to meet different load requirements under different operating modes, accurately control the load, avoid frequent start and stop of the compressor, which causes indoor temperature fluctuations, and improve comfort and heat exchange efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] Figure 1 It is a flow chart of a flow path adjustment method of an indoor heat exchanger provided by one embodiment of the present invention;

[0043] Figure 2 It is a structural schematic diagram of an indoor heat exchanger provided in one embodiment of the present invention.

[0044] Figure numerals: 100, first heat exchanger, 200, second heat exchanger, 300, regulating expansion valve, 400, heat exchange branch, 410, diverter, 420, solenoid valve, 430, diverter pipeline, 500, gas pipe, 600, liquid pipe, 700, main pipe. DETAILED DESCRIPTION

[0045] In order to make the purpose, technical solution and advantages of the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and cannot be understood as limiting the present invention.

[0046] It should be noted that, although the functional modules are divided in the system diagram, in some cases, the steps shown or described may be performed in a different order than the module division in the system or the order in the flowchart. The terms "first", "second", etc. in the specification, claims and the above drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence.

[0047] In the description of the present invention, it should be noted that, unless otherwise clearly defined, terms such as setting, installing, connecting, etc. should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention in combination with the specific content of the technical solution.

[0048] In one embodiment of the present invention, the flow path adjustment method of the indoor heat exchanger is applied to an indoor heat exchanger, referring to Figure 2 The indoor heat exchanger includes: a first heat exchanger 100, a second heat exchanger 200, a regulating expansion valve 300 and a heat exchange branch 400.

[0049] One end of the first heat exchanger 100 is connected to the external outdoor unit, the other end of the first heat exchanger 100 is connected to one end of the regulating expansion valve 300, the other end of the regulating expansion valve 300 is connected to one end of the heat exchange branch 400, and the other end of the heat exchange branch 400 is connected to the other end of the second heat exchanger 200. At least two heat exchange branches 400 are provided, thereby dividing the second heat exchanger 200 into multiple flow paths, and one end of the second heat exchanger 200 is connected to the external outdoor unit.

[0050] The first heat exchanger 100 can perform heat exchange processing with indoor air using refrigerant supplied from an external outdoor unit, and the second heat exchanger 200 can perform heat exchange processing with indoor air using refrigerant supplied from an external outdoor unit.

[0051] Wherein, the regulating expansion valve 300 is an electronic expansion valve.

[0052] In one embodiment, the heat exchange shunt 400 includes: a solenoid valve 420, a flow divider 410 and a flow divider pipeline 430. One end of the solenoid valve 420 is connected to the other end of the regulating expansion valve 300, the other end of the solenoid valve 420 is connected to one end of the flow divider 410, the other end of the flow divider 410 is connected to one end of the flow divider pipeline 430, and the other end of the flow divider pipeline 430 is connected to the second heat exchanger 200. Each flow divider 410 has two or more flow divider pipeline interfaces.

[0053] In the prior art, the bypass pipe 430 is connected to the second heat exchanger 200 through the solenoid valve 420, so the pipe layout in the indoor heat exchanger is complicated, and the indoor heat exchanger usually has a small installation space. The solenoid valve 420 is installed in front of the diverter 410 to reduce the pressure drop of the equipment at the diversion point. Then, multiple diverter pipes 430 can be regulated by a small number of solenoid valves 420, and the function of pipe regulation can still be achieved. Not only the pipes are simplified to meet the installation space of the indoor heat exchanger, but also the control can be simplified.

[0054] The heat exchange branch circuit 400 may also include: a diverter 410 and a diverter pipe 430, so that the indoor heat exchanger can be used as a constant temperature dehumidification heat exchanger.

[0055] In one embodiment, the indoor heat exchanger further includes: an air pipe 500, a liquid pipe 600 and a main pipe 700. One end of the first heat exchanger 100 is connected to the external outdoor unit through the liquid pipe 600, one end of the second heat exchanger 200 is connected to one end of the main pipe 700, and the other end of the main pipe 700 is connected to the external outdoor unit through the air pipe 500.

[0056] Among them, the external outdoor unit includes: a variable frequency compressor and a main electronic expansion valve.

[0057] In one embodiment of the present invention, Figure 1 is an optional flow chart of the flow path adjustment method of the indoor heat exchanger provided in the embodiment of the present application. Figure 1 The method may include but is not limited to including S100 to S400.

[0058] S100, detecting the current operation mode, and controlling the operation of the first heat exchanger, the second heat exchanger, the regulating expansion valve and the heat exchange branch according to the current operation mode.

[0059] S200, obtaining the current indoor temperature, calculating the temperature difference between the current indoor temperature and the set target temperature, and determining the current load state of the current operation mode according to the temperature difference.

[0060] S300, detecting the operating quantity of the heat exchange branch.

[0061] S400, in the current operation mode, according to the current load state and the operation quantity, the opening of the expansion valve is adjusted, and the corresponding heat exchange branch is controlled to be turned on or off.

[0062] S100 to S400 shown in the embodiment of the present application form an indoor heat exchanger through the first heat exchanger and the second heat exchanger, and at least two heat exchange branches are set to connect the first heat exchanger and the second heat exchanger. The load change is determined according to the temperature difference. In the corresponding operating mode, the expansion valve and the corresponding heat exchange branch are regulated according to the load change and the operating number of the heat exchange branch, the refrigerant flow path inside the indoor heat exchanger is changed, the heat exchange area of ​​the indoor heat exchanger is adjusted, and the different functions of the heat exchanger are changed to meet different load requirements under different operating modes, accurately control the load, avoid frequent start and stop of the compressor, which causes indoor temperature fluctuations, and improve comfort and heat exchange efficiency.

[0063] In S100, the current operating state of the unit is detected, the current operating mode is determined, and the first heat exchanger, the second heat exchanger, the regulating expansion valve and the heat exchange branch are controlled to operate according to the current operating mode.

[0064] Among them, the current operating modes include: cooling mode, heating mode and dehumidification mode.

[0065] In one embodiment, when the cooling mode is operated, the refrigerant becomes a low-temperature, low-pressure gas-liquid mixture after throttling in the external outdoor unit, and the external outdoor unit transmits the low-temperature, low-pressure gas-liquid mixture to the first heat exchanger. The first heat exchanger performs heat exchange processing with the indoor air according to the low-temperature, low-pressure gas-liquid mixture, and the indoor air temperature drops to cool the indoor room. The opening of the expansion valve is adjusted to be fully open, and the heat exchange shunts are all operated. By adjusting the expansion valve and the heat exchange shunts, the refrigerant flows into the second heat exchanger. The second heat exchanger performs heat exchange processing with the indoor air according to the refrigerant, and the indoor air temperature drops to cool the indoor room. After the refrigerant exchanges heat through the first heat exchanger and the second heat exchanger, it becomes a low-temperature, low-pressure gas and returns to the external outdoor unit to complete the refrigeration cycle.

[0066] In one embodiment, when the heating mode is operated, the external outdoor unit transmits the high-temperature and high-pressure refrigerant gas to the second heat exchanger, and the second heat exchanger performs heat exchange processing with the indoor air according to the high-temperature and high-pressure refrigerant gas, and the indoor air temperature rises to heat the indoor room. The expansion valve is adjusted to be fully open, and the heat exchange branch is operated. By adjusting the expansion valve and the heat exchange branch, the refrigerant flows into the first heat exchanger, and the first heat exchanger performs heat exchange processing with the indoor air according to the refrigerant. The indoor air temperature rises to heat the indoor room. The refrigerant is cooled after heat exchange with the first heat exchanger and the second heat exchanger, and the indoor air is heated to generate heat. The cooled refrigerant becomes a high-pressure gas-liquid mixture or liquid and returns to the external outdoor unit to complete the heating cycle.

[0067] In one embodiment, when the dehumidification mode is operated, the refrigerant is not throttled in the external outdoor unit, and the external outdoor unit transmits the high-pressure gas-liquid mixture or liquid to the first heat exchanger. The first heat exchanger performs heat exchange processing between the refrigerant and the indoor air. The indoor air is heated up and flows into the regulating expansion valve. The regulating expansion valve is closed, and the refrigerant becomes a low-temperature and low-pressure gas-liquid mixture after throttling through the regulating expansion valve. The heat exchange branches are all operated, and the low-temperature and low-pressure gas-liquid mixture flows into the second heat exchanger. The second heat exchanger performs heat exchange processing between the low-temperature and low-pressure gas-liquid mixture and the indoor air. The indoor air humidity is oversaturated and condensation occurs. The condensed water is discharged to realize indoor air dehumidification. During the dehumidification process, the first heat exchanger and the second heat exchanger respectively heat and cool the room, thereby achieving the purpose of constant temperature dehumidification.

[0068] In S200, the current indoor air temperature is detected to obtain the current indoor temperature. In the current operation mode, the set target temperature is obtained, and the temperature difference is calculated by the current indoor temperature and the set target temperature. The load state of the current unit is determined by the temperature difference to obtain the current load state.

[0069] In practical applications, the unit may have multiple indoor heat exchangers, and the set target temperature may be a preset temperature value or a temperature value obtained from a user instruction. In this embodiment, no specific restriction is imposed on the set target temperature value.

[0070] The current indoor temperature can be detected by a temperature detector.

[0071] In one embodiment, if the temperature difference is less than the first threshold, it is considered that the load is too small in the current operation mode, that is, the current load state is a state of too small load. If the temperature difference is greater than the second threshold, it is considered that the load is too large in the current operation mode, that is, the current load state is a state of too large load.

[0072] The load state is determined by the temperature difference between the current indoor temperature and the set target temperature. The larger the temperature difference, the greater the load, that is, the temperature difference is positively correlated with the load.

[0073] The first threshold may be equal to the second threshold, or may be smaller than the second threshold.

[0074] In S300, at least two heat exchange branches are provided, and there may be two or more heat exchange branches. The operating number of the heat exchange branches is obtained to determine the number of heat exchange branches, so as to facilitate regulation of heat exchange branches with different operating numbers according to load status and operation mode.

[0075] In this embodiment, the operating state of the flow divider in the heat exchange branch can be detected to determine the operating quantity of the heat exchange branch. The operating state of the solenoid valve in the heat exchange branch can also be detected to determine the operating quantity of the heat exchange branch.

[0076] In S400, under the current operating mode, the current load state in this mode is determined through S200, and the operating number of the heat exchange branches is determined through S300 to determine the adjustment strategy for the heat exchange branches, that is, turning on or off the corresponding heat exchange branches, so as to more finely control the heat exchange efficiency and fine-tune the load.

[0077] After completing the regulation of the corresponding heat exchange branch, return to S200 to detect the load state again until the current load state can meet the set load demand.

[0078] In one embodiment, the set load demand may be that the temperature difference is much smaller than the set first threshold, or that the current indoor temperature can reach the set target temperature. That is, if the current indoor temperature can reach the set target temperature, or when the temperature difference is much smaller than the set first threshold, it is considered that the current load state can meet the set load demand, and the adjustment strategy ends.

[0079] Compared with the existing technology of changing the compressor, this solution can finely adjust the heat exchange efficiency and accurately control the load to adapt to the load conditions of the unit, avoid frequent start and stop of the compressor, avoid drastic changes in the working state of the compressor, reduce indoor temperature fluctuations, and improve system stability.

[0080] In an embodiment of one aspect of the present invention, S200, determining the current load state specifically includes:

[0081] S210, when the temperature difference is less than the set first threshold, it is considered that the current load state is in a light load state under the current operation mode.

[0082] S220: When the temperature difference is greater than the set second threshold, it is considered that the current load state is in a relatively high load state under the current operation mode.

[0083] In S210, if the temperature difference between the current indoor temperature and the set target temperature is less than the set first threshold, it is considered that the current load is too small and is in a state of too small load. That is, in the current operation mode, the current load state is a state of too small load.

[0084] The first threshold is 2° C., that is, if the temperature difference is less than 2° C., it is considered that the load is too small. In this embodiment, the first threshold can be adjusted according to actual needs, and the value of the first threshold is not specifically limited.

[0085] In S220, if the temperature difference between the current indoor temperature and the set target temperature is less than the set second threshold, it is considered that the current load is too high and is in a state of too high load. That is, in the current operation mode, the current load state is a state of too high load.

[0086] Through S210 and S220, the load state is determined by using the temperature difference between the current indoor temperature and the set target temperature, so that the heat exchange branch of the indoor heat exchanger can be adjusted to adapt to the load change, and the load and temperature can be accurately adjusted to meet different load requirements in different modes. The larger the temperature difference, the greater the load, that is, the temperature difference is positively correlated with the load.

[0087] The second threshold may be equal to the first threshold.

[0088] For example, when the first threshold is 2° C., the second threshold is also 2° C. If the temperature difference is greater than 2° C., it is considered that the current load state is a large load state in the current operating mode; if the temperature difference is less than 2° C., it is considered that the current load state is a small load state in the current operating mode.

[0089] The second threshold value may be greater than the first threshold value.

[0090] For example, when the first threshold is 2° C., the second threshold is 5° C. If the temperature difference is greater than 5° C., it is considered that the current load state is a large load state in the current operation mode; if the temperature difference is less than 2° C., it is considered that the current load state is a small load state in the current operation mode.

[0091] In an embodiment of one aspect of the present invention, S400, in the heating mode, the process of turning on or off the corresponding heat exchange branch specifically includes:

[0092] S410, in the heating mode, when it is determined that the current load state is a low load state, the opening of the expansion valve is controlled and adjusted to maintain it in a fully open state.

[0093] S411, when the running number is greater than the set number, at least two heat exchange branches are cut off at the same time, and the running is maintained for the set time period.

[0094] S412: After a set time period has passed, detect whether the current load state is a heavy load state.

[0095] S413: If yes, then reduce the opening of the expansion valve, control the first heat exchanger to operate in a cooling state, and control the second heat exchanger to maintain operation in a heating state.

[0096] In S410, when the current operation mode is the heating mode, the first heat exchanger and the second heat exchanger are controlled to heat according to the heating mode. In the heating mode, according to the temperature difference, it is determined that the current load state is a small load state. That is, when the heating load is small, the expansion valve is adjusted to maintain a fully open opening.

[0097] In S411, if the number of operating heat exchange branches is greater than the set number, that is, there are multiple heat exchange branches in parallel, more than two solenoid valves are closed at the same time to cut off at least two heat exchange branches, thereby changing the refrigerant flow path of the second heat exchanger and reducing the heat exchange area of ​​the second heat exchanger. At this time, the expansion valve is adjusted to fully open to reduce heat output so that the unit can operate stably.

[0098] In S412, since the heat in the heating mode is greater than the cooling in the cooling mode, the heating load may still be too large. Therefore, after the heating load is reduced for a set period of time, the current load status needs to be detected again.

[0099] In S413, when the heating load is still too large after the heating load is reduced, the opening of the expansion valve is adjusted to be smaller and smaller, and the refrigerant becomes a low-temperature and low-pressure mixture after throttling, and enters the first heat exchanger. The first heat exchanger performs heat exchange processing, and the indoor air is cooled. The first heat exchanger switches to cooling, and the second heat exchanger is still heating, further reducing the heat output, completing the control strategy of reducing the heating load.

[0100] Among them, the set number is two, that is, when the operating number is greater than two, more than two heat exchange branches are cut off or turned on.

[0101] In another embodiment, when the heating load is still too large after the heating load is reduced, the heat exchange branch that is cut off in S411 is turned on, and the opening of the expansion valve is adjusted to be small and small. The first heat exchanger is switched to cooling, and the second heat exchanger is still heating. The effect of adjusting the heating load can also be achieved, completing the control strategy of reducing the heating load.

[0102] Through S410 to S413, according to the change of heating load, the heat exchange branch is regulated, and according to the number of branches in operation, the heat output is adjusted to make the unit operate stably and meet the load demand. In response to the fluctuation of heating load, the opening of the expansion valve is controlled to change the function of the first heat exchanger to achieve heating load regulation, simple control, reduce heat output, finely adjust heat exchange efficiency, and accurately regulate load, reduce indoor temperature fluctuations, and improve system stability.

[0103] In an embodiment of one aspect of the present invention, S400, in the heating mode, the process of turning on or off the corresponding heat exchange branch specifically includes:

[0104] S420, in the heating mode, when it is determined that the current load state is a low load state, the opening of the expansion valve is controlled and adjusted to maintain it in a fully open state.

[0105] S421, when the number of operating paths is two, one heat exchange path is turned on, the other heat exchange path is turned off, and the operation is maintained for the set time period.

[0106] S422, after a set time period has passed, detecting whether the current load state is a heavy load state.

[0107] S423: If yes, then reduce the opening of the expansion valve to control the first heat exchanger to operate in a cooling state, and connect the two heat exchange branches to control the second heat exchanger to maintain operation in a heating state.

[0108] In S420, when the current operation mode is the heating mode, the first heat exchanger and the second heat exchanger are controlled to heat according to the heating mode. In the heating mode, according to the temperature difference, it is determined that the current load state is a small load state. That is, when the heating load is small, the expansion valve is adjusted to maintain a fully open opening.

[0109] In S421, if the number of operating heat exchange branches is two, that is, two heat exchange branches are in operation, then one solenoid valve is arbitrarily closed to connect one heat exchange branch and cut off the other heat exchange branch, thereby changing the refrigerant flow path of the second heat exchanger and reducing the heat exchange area of ​​the second heat exchanger. At this time, the expansion valve is adjusted to fully open to reduce heat output so that the unit can operate stably.

[0110] In S422, since the heat in the heating mode is greater than the cooling in the cooling mode, the heating load may still be too large. Therefore, after the heating load is reduced for a set period of time, the current load status needs to be detected again.

[0111] In S423, when the heating load is still too high after the heating load is reduced, the heat exchange branch that was cut off in S421 is turned on to turn on the two heat exchange branches, and the opening of the expansion valve is adjusted to be small and small. The first heat exchanger switches to cooling, and the second heat exchanger is still heating, thereby achieving the effect of adjusting the heating load and completing the control strategy of reducing the heating load.

[0112] In another embodiment, when the heating load is still too large after the heating load is reduced, the opening of the expansion valve is adjusted to be smaller and smaller, and the refrigerant becomes a low-temperature and low-pressure mixture after throttling, and enters the first heat exchanger. The first heat exchanger performs heat exchange processing, and the indoor air is cooled. The first heat exchanger switches to cooling, and the second heat exchanger is still heating, reducing the heat output, which can also achieve the effect of adjusting the heating load and complete the control strategy of reducing the heating load.

[0113] Through S420 to S423, according to the change of heating load, the heat exchange branch is regulated, and the heat output is adjusted according to the number of branches in operation, so that the unit can operate stably and meet the load demand. In response to the fluctuation of heating load, the opening of the expansion valve is controlled to change the function of the first heat exchanger, and the two heat exchange branches are connected to achieve heating load regulation, further reduce heat output, finely adjust heat exchange efficiency, and accurately regulate load, reduce indoor temperature fluctuations, and improve system stability.

[0114] In an embodiment of one aspect of the present invention, S400, in the cooling mode, the process of turning on or off the corresponding heat exchange branch specifically includes:

[0115] S430, in the cooling mode, when it is determined that the current load state is a low load state, reducing the opening of the expansion valve;

[0116] S431, when the running quantity is greater than the set quantity, at least two heat exchange branches are cut off at the same time.

[0117] In S430, when the current operation mode is the cooling mode, the first heat exchanger and the second heat exchanger are controlled to cool according to the cooling mode. In the cooling mode, according to the temperature difference, it is determined that the current load state is a small load state. That is, when the cooling load is small, the opening of the expansion valve is adjusted to be small.

[0118] In S431, if the number of operating heat exchange branches is greater than the set number, that is, there are multiple heat exchange branches in parallel, more than two solenoid valves are closed at the same time to cut off at least two heat exchange branches, thereby changing the refrigerant flow path of the second heat exchanger and reducing the heat exchange area of ​​the second heat exchanger. At this time, the opening of the expansion valve is adjusted to be smaller, the refrigerant flow rate is reduced, and the cooling output is reduced, so that the unit can operate stably.

[0119] Among them, the set number is two, that is, when the operating number is greater than two, the heat exchange branches above two will be cut off.

[0120] In an embodiment of one aspect of the present invention, S400, in the cooling mode, the process of turning on or off the corresponding heat exchange branch specifically includes:

[0121] S440, in the cooling mode, when it is determined that the current load state is a low load state, reducing the opening of the expansion valve;

[0122] S441, when the number of running paths is two, one heat exchange branch path is turned on and the other heat exchange branch path is turned off.

[0123] In S440, when the current operation mode is the cooling mode, the first heat exchanger and the second heat exchanger are controlled to cool according to the cooling mode. In the cooling mode, according to the temperature difference, it is determined that the current load state is a small load state. That is, when the cooling load is small, the opening of the expansion valve is adjusted to be small or closed.

[0124] In S441, if the number of operating heat exchange branches is two, that is, two heat exchange branches are in operation, then one solenoid valve is arbitrarily closed to connect one heat exchange branch and cut off the other heat exchange branch, thereby changing the refrigerant flow path of the second heat exchanger, reducing the heat exchange area of ​​the second heat exchanger, reducing the refrigerant flow, and reducing the cooling output, so that the unit can operate stably.

[0125] Through S430 to S441, according to the change of cooling load, the heat exchange branch is adjusted, and according to the number of branches in operation, the cooling output is adjusted to make the unit operate stably and meet the load demand. Finely adjust the heat exchange efficiency and accurately adjust the load to reduce indoor temperature fluctuations and improve system stability.

[0126] In addition, through S410 to S441, the expansion valve and the heat exchange branch are regulated according to the change of load, the heat exchange flow path is changed and / or the operating state of the first heat exchanger is changed to meet the different load requirements of the cooling mode and the heating mode.

[0127] In an embodiment of one aspect of the present invention, the flow path adjustment method further comprises:

[0128] S500, obtaining the current indoor humidity, and in the dehumidification mode, determining whether the current indoor humidity reaches the set target humidity.

[0129] S510, if yes, it is considered that the dehumidification demand is small, the opening of the expansion valve is reduced, and the corresponding heat exchange branch is controlled to be cut off according to the running quantity, so that the current indoor humidity is maintained at the set target humidity.

[0130] In S500, when the unit is running in dehumidification mode, the humidity of the current indoor air is detected to obtain the current indoor humidity, and the current dehumidification demand is determined by the current indoor humidity and the set target humidity.

[0131] If the current indoor humidity reaches the set target humidity, it is considered that the current dehumidification demand is small.

[0132] In practical applications, the unit may have multiple indoor heat exchangers, and the set target humidity may be a preset humidity value or a humidity value obtained from a user instruction. In this embodiment, no specific restriction is imposed on the set target humidity value.

[0133] If the current indoor humidity is greater than the set humidity threshold, it is considered that the current dehumidification demand is large.

[0134] The humidity threshold value may be set according to the target humidity and actual parameters, and is not specifically limited in this embodiment.

[0135] In S510, if the current indoor humidity reaches the set target humidity, it is considered that the current dehumidification demand is small, and the opening of the expansion valve is adjusted to be smaller.

[0136] In the dehumidification mode, when the number of operating heat exchange branches is two, that is, two heat exchange branches are in operation, one solenoid valve is closed at random to connect one heat exchange branch and cut off the other heat exchange branch, change the dehumidification flow path, adjust the dehumidification amount, and keep the indoor humidity constant at the set target humidity.

[0137] In another embodiment, in the dehumidification mode, when the operating number of heat exchange branches is greater than the set number, that is, there are multiple heat exchange branches in parallel, more than two solenoid valves are closed at the same time to cut off at least two heat exchange branches, change the dehumidification flow path, adjust the dehumidification amount, and keep the indoor humidity constant at the set target humidity.

[0138] Among them, the set number is two, that is, when the operating number is greater than two, the heat exchange branches above two will be cut off.

[0139] S520, if the current indoor humidity is greater than the set humidity threshold, it is considered that the current dehumidification demand is large, the opening of the expansion valve is increased, and all heat exchange branches are controlled to be open so that the current indoor humidity reaches the set target humidity.

[0140] In this embodiment, if the current indoor humidity is high and the dehumidification demand is high, the opening of the expansion valve is adjusted to increase, all heat exchange branches are connected, the dehumidification capacity is increased, and dehumidification is performed quickly.

[0141] According to an embodiment of another aspect of the present invention, a computer device is provided.

[0142] The computer device includes a processor, a memory and a database connected through a system bus. The processor of the computer device is used to provide computing and control capabilities. The memory of the computer device includes a non-volatile storage medium and an internal memory. The non-volatile storage medium stores an operating system, a computer program and a database. The internal memory provides an environment for the operation of the operating system and the computer program in the non-volatile storage medium. When the computer program is executed by the processor, the flow path regulation method of the indoor heat exchanger of one aspect is implemented.

[0143] The memory and the processor components are electrically connected to each other directly or indirectly to achieve data transmission or interaction. For example, these components can be electrically connected to each other through one or more communication buses or signal lines. The processor includes at least one software function module that can be stored in the memory in the form of software or firmware or solidified in the operating system (OS) of the server. The processor is used to execute the executable module stored in the memory.

[0144] The memory may be a random access memory (RAM), a read only memory (ROM), a programmable read-only memory (PROM), an erasable programmable read-only memory (EPROM), an electrically erasable read-only memory (EEPROM), etc. The memory is used to store programs and voice data, and the processor executes the program after receiving the execution instruction.

[0145] The processor may be an integrated circuit chip with signal processing capabilities. The above-mentioned processor may be a general-purpose processor, including a central processing unit (CPU), a network processor (NP), etc.; it may also be a digital signal processor (DSP), an application-specific integrated circuit (ASIC), a field-programmable gate array (FPGA) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components. The methods, steps and logic block diagrams disclosed in the embodiments of the present invention may be implemented or executed. The general-purpose processor may be a microprocessor or the processor may also be any conventional processor, etc.

[0146] The processor couples various input / output devices to the processor and the memory. In some embodiments, the processor and the memory can be implemented in a single chip. In some other examples, they can be implemented by separate chips respectively.

[0147] The peripheral interface couples various input / output devices to the processor and the memory. In some embodiments, the peripheral interface, the processor and the memory can be implemented in a single chip. In some other examples, they can be implemented by separate chips respectively.

[0148] According to another aspect of the present invention, a computer storage medium is provided, wherein a computer program is stored in the computer storage medium, and the computer storage medium may be a magnetic random access memory, a read-only memory, a programmable read-only memory, an erasable programmable read-only memory, an electrically erasable programmable read-only memory, a flash memory, a magnetic surface memory, an optical disk, or a read-only optical disk, etc.; or may be various devices including one or any combination of the above memories, such as a mobile phone, a computer, a tablet device, a personal digital assistant, etc. When the computer program is executed by a processor, the flow path adjustment method of the indoor heat exchanger of one aspect is implemented.

[0149] A person skilled in the art may implement the present invention in a variety of variations without departing from the scope and essence of the present invention, such as using a feature of one embodiment to obtain another embodiment. The preferred embodiments of the embodiments of the present disclosure are described above with reference to the accompanying drawings, but the scope of rights of the embodiments of the present disclosure is not limited thereby. Any modification, equivalent substitution and improvement made by a person skilled in the art without departing from the scope and essence of the embodiments of the present disclosure shall be within the scope of rights of the embodiments of the present disclosure.

Claims

1. A flow path adjustment method for an indoor heat exchanger, characterized in that: The indoor heat exchanger comprises: a first heat exchanger, a second heat exchanger, a regulating expansion valve and a heat exchange branch; One end of the first heat exchanger and one end of the second heat exchanger are connected to an external outdoor unit, the other end of the second heat exchanger is connected to one end of the regulating expansion valve through the heat exchange branch, the other end of the first heat exchanger is connected to the other end of the regulating expansion valve, and the heat exchange branch is provided with at least two paths; The method comprises: Detecting a current operation mode, and controlling the operation of the first heat exchanger, the second heat exchanger, the regulating expansion valve, and the heat exchange branch according to the current operation mode; Acquiring a current indoor temperature, calculating a temperature difference between the current indoor temperature and a set target temperature, and determining a current load state of the current operating mode according to the temperature difference; Detecting the operating quantity of the heat exchange branch; In the current operation mode, the opening of the regulating expansion valve is adjusted according to the current load state and the operation quantity, and the corresponding heat exchange branch is controlled to be turned on or off.

2. The flow path adjustment method of the indoor heat exchanger according to claim 1, characterized in that: Determining the current load state of the current operation mode according to the temperature difference includes: When the temperature difference is less than the set first threshold, it is considered that in the current operation mode, the current load state is in a state of low load; When the temperature difference is greater than the set second threshold, it is considered that in the current operation mode, the current load state is in a state of excessive load; The set first threshold is equal to or less than the set second threshold, and the current operation mode includes a cooling mode and a heating mode.

3. The flow path adjustment method of the indoor heat exchanger according to claim 2, characterized in that: When the current operation mode is the heating mode, adjusting the opening of the regulating expansion valve according to the current load state and the operation quantity, and controlling the corresponding heat exchange branch to be turned on or off includes: In the heating mode, when it is determined that the current load state is the underload state, controlling the opening of the regulating expansion valve to be maintained in a fully open state; When the running number is greater than the set number, at least two of the heat exchange branches are cut off at the same time, and the running is maintained for the set time period; After a set time period has passed, detecting whether the current load state is the overload state; If so, the opening of the regulating expansion valve is reduced, the first heat exchanger is controlled to operate in a cooling state, and the second heat exchanger is controlled to maintain operation in a heating state.

4. The flow path adjustment method of the indoor heat exchanger according to claim 2, characterized in that: When the current operation mode is the heating mode, adjusting the opening of the regulating expansion valve according to the current load state and the operation quantity, and controlling the corresponding heat exchange branch to be turned on or off includes: In the heating mode, when it is determined that the current load state is the underload state, controlling the opening of the regulating expansion valve to be maintained in a fully open state; When the number of the operation paths is two, one of the heat exchange paths is turned on, the other heat exchange path is turned off, and the operation is maintained for the set time period; After a set time period has passed, detecting whether the current load state is the overload state; If so, the opening of the regulating expansion valve is reduced to control the first heat exchanger to operate in a cooling state, and the two heat exchange branches are connected to control the second heat exchanger to maintain operation in a heating state.

5. The flow path adjustment method of the indoor heat exchanger according to claim 2, characterized in that: When the current operation mode is the cooling mode, adjusting the opening of the regulating expansion valve according to the current load state and the operation quantity, and controlling the corresponding heat exchange branch to be turned on or off includes: In the cooling mode, when it is determined that the current load state is the underload state, reducing the opening of the regulating expansion valve; When the running quantity is greater than the set quantity, at least two of the heat exchange branches are cut off simultaneously.

6. The flow path adjustment method of the indoor heat exchanger according to claim 2, characterized in that: When the current operation mode is the cooling mode, adjusting the opening of the regulating expansion valve according to the current load state and the operation quantity, and controlling the corresponding heat exchange branch to be turned on or off includes: In the cooling mode, when it is determined that the current load state is the underload state, reducing the opening of the regulating expansion valve; When the number of operations is two, one of the heat exchange branches is turned on and the other heat exchange branch is turned off.

7. The flow path adjustment method of the indoor heat exchanger according to claim 1, characterized in that: The current operation mode includes a dehumidification mode; the method further includes: Obtaining the current indoor humidity, and in the dehumidification mode, determining whether the current indoor humidity reaches the set target humidity; If so, it is considered that the dehumidification demand is small, the opening of the regulating expansion valve is reduced, and according to the running quantity, the corresponding heat exchange branch is controlled to be cut off so that the current indoor humidity is maintained at the set target humidity.

8. The flow path adjustment method of the indoor heat exchanger according to claim 7, characterized in that: According to the running quantity, controlling the corresponding heat exchange branch to be cut off includes: In the dehumidification mode, when the number of operations is two, one of the heat exchange branches is turned on and the other heat exchange branch is turned off.

9. A computer device, characterized in that: include: a memory storing a computer program; A processor, wherein when the processor executes the computer program, the flow path regulating method of the indoor heat exchanger according to any one of claims 1 to 8 is implemented.

10. A storage medium storing a computer program, characterized in that: When the computer program is executed by a processor, the flow path regulating method of the indoor heat exchanger according to any one of claims 1 to 8 is implemented.

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