Air source heat pump water machine, control method thereof, air conditioner and readable storage medium

Abstract

The application discloses an air source heat pump water machine, a control method thereof, an air conditioner and a readable storage medium, and belongs to the technical field of new energy. The air source heat pump water machine comprises a four-way valve; a compressor, an outdoor heat exchanger and an indoor heat exchanger in communication with the four-way valve, wherein the indoor heat exchanger comprises a refrigerant pipeline and a heat exchange pipeline; a flow guide water tank connected with the outdoor heat exchanger; a circulating water pump arranged at a water inlet of the heat exchange pipeline; an auxiliary pipeline in communication with a water outlet of the heat exchange pipeline and the flow guide water tank respectively; and an electromagnetic valve arranged in the auxiliary pipeline. When the operating state of the outdoor heat exchanger meets a preset condition, the electromagnetic valve is electrified, the auxiliary pipeline is conducted, part of heat exchange water of the water outlet flows into the flow guide water tank through the auxiliary pipeline, and flows to the outdoor heat exchanger along the small holes on the flow guide water tank. The application realizes the recycling of the heat exchange water, avoids the abnormal situation that the heat exchange efficiency of the outdoor heat exchanger is low and the system energy consumption is excessively high due to the outdoor harsh environment.

Description

Technical Field

[0001] This invention relates to the field of new energy technology, and in particular to air source heat pump water heaters and their control methods, air conditioners, and readable storage media. Background Technology

[0002] Air source heat pump units utilize the reverse circulation principle to extract low-grade heat energy from the atmosphere and convert it into high-grade heat energy. By using a four-way reversing valve to switch the refrigerant flow, they can achieve independent cooling and heating. Therefore, compared with traditional heating and domestic hot water supply methods, air source heat pump units not only have higher energy efficiency but also more comprehensive operational functions. In recent years, especially driven by the "coal-to-electricity" policy, air source heat pump units have experienced rapid development. However, some shortcomings still exist in the current operation of air source heat pump units.

[0003] In existing air source heat pump water systems, the outdoor heat exchanger only exchanges heat through a fan, which is greatly affected by the outdoor ambient temperature. When the outdoor ambient temperature is relatively harsh, the heat exchange efficiency will be low, resulting in increased system energy consumption and affecting user comfort. Summary of the Invention

[0004] The main objective of this invention is to provide an air-source heat pump water heater and its control method, an air conditioner, and a readable storage medium, aiming to solve the technical problem of how to improve the heat exchange efficiency of an outdoor heat exchanger under harsh outdoor ambient temperatures.

[0005] To achieve the above objectives, the present invention provides an air source heat pump water heater, the air source heat pump water heater comprising:

[0006] Four-way valve;

[0007] The compressor, both its input and output ends are connected to the four-way valve;

[0008] An outdoor heat exchanger, which is connected to the four-way valve;

[0009] A water guide channel, which is connected to the outdoor heat exchanger;

[0010] An indoor heat exchanger, comprising refrigerant piping and heat exchange piping, wherein the refrigerant piping is connected to the four-way valve;

[0011] A circulating water pump is installed at the inlet of the heat exchange pipeline;

[0012] The auxiliary pipeline is connected to the outlet of the heat exchange pipeline and the guide water channel, respectively.

[0013] A solenoid valve, wherein the solenoid valve is disposed in the auxiliary pipeline;

[0014] When the outdoor heat exchanger operates under preset conditions, the solenoid valve is energized, the auxiliary pipeline is opened, and part of the hot water from the outlet flows through the auxiliary pipeline into the guide water trough, and then flows along the small holes on the guide water trough to the outdoor heat exchanger.

[0015] Optionally, the air source heat pump water heater further includes:

[0016] A throttling valve, which is connected to both the outdoor heat exchanger and the refrigerant pipeline;

[0017] The four-way valve, outdoor heat exchanger, throttle valve, and refrigerant piping of the indoor heat exchanger together form a refrigerant passage.

[0018] Optionally, the air source heat pump water heater further includes:

[0019] An outdoor fan is used to draw outdoor air through the outdoor heat exchanger.

[0020] Optionally, when the air source heat pump water heater is in cooling mode, the guide water channel is used to assist the outdoor heat exchanger in absorbing heat;

[0021] When the air source heat pump water heater is in heating mode, the water guide channel is used to assist the outdoor heat exchanger in dissipating heat.

[0022] Furthermore, to achieve the above objectives, the present invention also provides a control method for an air source heat pump water heater, wherein the control method is applied to the air source heat pump water heater described above, and the steps of the control method include:

[0023] Obtain the operating status of the outdoor heat exchanger;

[0024] Determine whether the operating status of the outdoor heat exchanger meets preset conditions;

[0025] If the operating status of the outdoor heat exchanger meets the preset conditions, the solenoid valve is energized to open the auxiliary pipeline.

[0026] Optionally, the step of obtaining the operating status of the outdoor heat exchanger includes:

[0027] The operating mode of the air source heat pump water heater is obtained, and the operating status of the outdoor heat exchanger is obtained based on the operating mode.

[0028] Optionally, the step of determining whether the operating status of the outdoor heat exchanger meets preset conditions includes:

[0029] When the air source heat pump water heater is in heating mode, the coil temperature of the outdoor heat exchanger is dynamically acquired, and it is determined whether the coil temperature of the outdoor heat exchanger is not greater than the first temperature threshold.

[0030] If the coil temperature of the outdoor heat exchanger is not greater than the first temperature threshold, then the operating status of the outdoor heat exchanger is determined to meet the preset conditions.

[0031] Optionally, the step of determining whether the operating status of the outdoor heat exchanger meets preset conditions further includes:

[0032] When the air source heat pump water heater is in cooling mode, the outdoor ambient temperature is dynamically acquired, and it is determined whether the outdoor ambient temperature is not less than the second temperature threshold.

[0033] If the outdoor ambient temperature is not less than the second temperature threshold, then obtain the coil temperature of the outdoor heat exchanger and the water temperature at the outlet.

[0034] Determine whether the coil temperature of the outdoor heat exchanger is greater than the water temperature at the outlet.

[0035] If the coil temperature of the outdoor heat exchanger is greater than the water temperature at the outlet, then the operating status of the outdoor heat exchanger is determined to meet the preset conditions.

[0036] In addition, to achieve the above objectives, the present invention also provides an air conditioner, the air conditioner including a memory, a processor, and a control program for an air source heat pump water heater stored in the memory and executable on the processor, wherein when the control program for the air source heat pump water heater is executed by the processor, it implements the steps of the control method for the air source heat pump water heater as described above.

[0037] In addition, to achieve the above objectives, the present invention also provides a computer-readable storage medium storing a control program for an air source heat pump water heater, wherein the control program for the air source heat pump water heater, when executed by a processor, implements the steps of the control method for the air source heat pump water heater as described above.

[0038] This invention proposes an air-source heat pump water heater and its control method, an air conditioner, and a computer-readable storage medium, overcoming the technical problem of low heat exchange efficiency of the outdoor heat exchanger in existing technologies under harsh outdoor ambient temperatures. This invention improves the air-source heat pump water heater by adding a guide water channel above the outdoor heat exchanger and connecting this channel to the outlet of the heat exchange pipe of the indoor heat exchanger to form an auxiliary pipeline. A solenoid valve is added to this auxiliary pipeline. Under harsh outdoor ambient temperatures, the solenoid valve is energized to open the auxiliary pipeline, guiding a portion of the hot water from the outlet to the outdoor heat exchanger to assist in heat exchange. This effectively utilizes the circulation advantage of the hot water, improving the heat exchange efficiency of the outdoor heat exchanger and avoiding increased system energy consumption and negative impacts on user experience caused by low heat exchange efficiency. This achieves energy saving and consumption reduction, and improves the user experience. Attached Figure Description

[0039] Figure 1 This is a schematic diagram of the structure of an embodiment of the air source heat pump water heater of the present invention;

[0040] Figure 2 This is a schematic diagram of the hardware structure involved in the operation of an embodiment of the present invention;

[0041] Figure 3 This is a flowchart illustrating an embodiment of the control method for an air source heat pump water heater according to the present invention;

[0042] Figure 4 This is a flowchart illustrating another embodiment of the control method for the air source heat pump water heater of the present invention;

[0043] Figure 5 This is a flowchart illustrating another embodiment of the control method for the air source heat pump water heater of the present invention.

[0044] The realization of the objective, functional features and advantages of the present invention will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0045] It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

[0046] This invention provides an air-source heat pump water heater, as described in the following embodiment. Figure 1 , Figure 1 This is a schematic diagram of the structure of an embodiment of the air source heat pump water machine of the present invention.

[0047] In this embodiment, the air source heat pump water heater includes:

[0048] Four-way valve 1;

[0049] Compressor 2, the input and output ends of which are both connected to the four-way valve 1;

[0050] Outdoor heat exchanger 3, which is connected to the four-way valve 1;

[0051] Water diversion channel 4, which is connected to the outdoor heat exchanger 3;

[0052] Indoor heat exchanger 5, the indoor heat exchanger 5 includes a refrigerant pipeline and a heat exchange pipeline, the refrigerant pipeline is connected to the four-way valve 1;

[0053] A circulating water pump 6 is installed at the inlet of the heat exchange pipeline;

[0054] The auxiliary pipeline is connected to the outlet of the heat exchange pipeline and the guide water tank 4 respectively;

[0055] Solenoid valve 7, wherein the solenoid valve 7 is disposed in the auxiliary pipeline;

[0056] When the outdoor heat exchanger 3 operates under preset conditions, the solenoid valve 7 is energized, the auxiliary pipeline is opened, and part of the hot water from the outlet flows through the auxiliary pipeline into the guide water trough 4, and then flows along the small holes on the guide water trough 4 to the outdoor heat exchanger 3.

[0057] It should be noted that the air source heat pump water heater can be used in air conditioners, and the air conditioner can be any type of air conditioner such as wall-mounted air conditioner, cabinet air conditioner, portable air conditioner, window air conditioner, multi-split air conditioner, ceiling air conditioner, etc.

[0058] In this embodiment, the four-way valve 1 is a control valve with four ports, used to switch between cooling and heating modes. Its working principle is as follows: When the solenoid valve coil is de-energized, the pilot slide valve moves to the left under the drive of the right compression spring. High-pressure gas enters the capillary tube and then the right piston chamber. Meanwhile, gas from the left piston chamber is discharged. Due to the pressure difference between the two ends of the piston, the piston and the main slide valve move to the left, connecting the exhaust pipe to the outdoor unit's connecting pipe. The other two connecting pipes are also connected, forming a cooling cycle. When the solenoid valve coil is energized, the pilot slide valve overcomes the tension of the compression spring and moves to the right under the magnetic force generated by the solenoid coil. High-pressure gas enters the capillary tube and then the left piston chamber. Meanwhile, gas from the right piston chamber is discharged. Due to the pressure difference between the two ends of the piston, the piston and the main slide valve move to the right, connecting the exhaust pipe to the indoor unit's connecting pipe. The other two connecting pipes are also connected, forming a heating cycle.

[0059] In this embodiment, the compressor 2 is a driven fluid machine that elevates low-pressure gas to high-pressure gas. It is used to compress and transport refrigerant and is the heart of the refrigeration system. It draws in low-temperature, low-pressure refrigerant gas through the suction pipe, compresses it via a piston driven by a motor, and then discharges high-temperature, high-pressure refrigerant gas through the exhaust pipe, providing power for the refrigeration cycle. This achieves a refrigeration cycle of compression → condensation (heat release) → expansion → evaporation (heat absorption). Figure 1 It can be seen that the direction of the dashed arrow is the direction of refrigerant flow in heating mode, while the direction of the solid arrow is the direction of refrigerant flow in cooling mode.

[0060] In this embodiment, the outdoor heat exchanger 3 and the indoor heat exchanger 5 are devices that transfer part of the heat from a hot fluid to a cold fluid, also known as heat exchangers. They are energy-saving devices that enable heat transfer between two or more fluids at different temperatures. Optionally, they can be floating head heat exchangers, fixed tube sheet heat exchangers, U-tube sheet heat exchangers, plate heat exchangers, etc. In this embodiment, a plate heat exchanger is used as an example, and the specific types of the outdoor heat exchanger 3 and the indoor heat exchanger 5 are not limited. The outdoor heat exchanger 3 includes two ports for providing channels for the flowing refrigerant.

[0061] In this embodiment, the water guide channel 4 can be considered as a component installed vertically on the outdoor heat exchanger 3. The water guide channel 4 can be connected to the top of the outdoor heat exchanger 3 by means of a snap-fit ​​mechanism, or it can be fixed to the top of the outdoor heat exchanger 3 by welding. The water guide channel 4 can be as follows: Figure 1 The "L"-shaped water tank shown can also be a "U"-shaped, "O"-shaped, or other shapes. This embodiment does not limit this, as long as it allows more water in the guide water tank 4 to cover the outdoor heat exchanger 3. The guide water tank 4 contains multiple small holes, which can be circular, square, or other polygonal.

[0062] In this embodiment, the indoor heat exchanger 5 includes a refrigerant pipeline and a heat exchange pipeline. One end of the refrigerant pipeline is connected to the four-way valve 1. The heat exchange pipeline runs through the indoor heat exchangers 5 and is used to help the indoor heat exchangers 5 perform heat exchange. It includes an inlet and an outlet. The inlet can be connected to a water pipe, and the outlet can be connected to underfloor heating or a fan coil unit.

[0063] In this embodiment, the circulating water pump 6 is located at the inlet of the heat exchange pipeline to drive the water medium to flow in the heat exchange pipeline. It should be noted that the water medium in the heat exchange pipeline in this embodiment can also be replaced by other heat exchange fluid media. The use of water as an example in this embodiment is only for ease of understanding and cost saving.

[0064] In this embodiment, the auxiliary pipeline is connected to the outlet of the heat exchange pipeline and the guide water tank 4 respectively; the auxiliary pipeline is a one-way flow pipeline, which only supports the flow of hot water from the outlet to the guide water tank; the solenoid valve 7 is installed in the auxiliary pipeline; the solenoid valve 7 is a one-way shut-off valve, which plays a role in cutting off flow in one direction. When the operating state of the outdoor heat exchanger 3 does not meet the preset conditions, the solenoid valve 7 is in a normally closed state without power. At this time, the hot water from the outlet cannot flow to the guide water tank 4 through the auxiliary pipeline.

[0065] In this embodiment, the outdoor heat exchanger 3 is considered to meet the preset conditions only when its operating state is abnormal. The abnormal state refers to the situation where the heat exchange efficiency of the outdoor heat exchanger 3 is low, but the system energy consumption is high. At this time, the solenoid valve 7 will be energized to open the auxiliary pipeline, so that part of the hot water at the outlet can flow through the auxiliary pipeline to the guide water tank 4, and then flow along the multiple small holes on the guide water tank 4 to the outdoor heat exchanger 3.

[0066] Optionally, the air source heat pump water heater further includes: a throttling valve 8, which is connected to the outdoor heat exchanger 3 and the refrigerant pipeline respectively; the four-way valve 1, the outdoor heat exchanger 3, the throttling valve 8 and the refrigerant pipeline of the indoor heat exchanger 5 together form a refrigerant passage.

[0067] It should be noted that the throttling valve 8 includes a throttling device and a filter. Since the gaseous refrigerant discharged by the compressor will become a high-temperature and high-pressure liquid refrigerant after being cooled and condensed by the heat exchanger, it is necessary to use the throttling valve 8 to cool and depressurize the high-temperature and high-pressure liquid refrigerant after it has been cooled and condensed by the heat exchanger, so that it becomes a low-temperature and low-pressure liquid refrigerant, and then flows to another heat exchanger for evaporation and heat absorption.

[0068] Understandably, by Figure 1 It is evident that the refrigerant pipelines of the four-way valve 1, the outdoor heat exchanger 3, the throttle valve 8, and the indoor heat exchanger 5 are interconnected, forming a refrigerant path in the air source heat pump water machine. The air source heat pump water machine achieves its cooling and heating effects based on the refrigerant flow in the refrigerant path.

[0069] Optionally, the air source heat pump water heater further includes an outdoor fan 9, which is used to drive outdoor air through the outdoor heat exchanger 3.

[0070] It is understood that the heat exchange of the indoor heat exchanger 5 is achieved through the fluid medium in the heat exchange pipeline, while the heat exchange of the outdoor heat exchanger 3 is achieved by the outdoor fan 9 driving outdoor air through the outdoor heat exchanger 3.

[0071] Optionally, when the air source heat pump water heater is in cooling mode, the water guide trough 4 is used to assist the outdoor heat exchanger 3 in absorbing heat; when the air source heat pump water heater is in heating mode, the water guide trough 4 is used to assist the outdoor heat exchanger 3 in dissipating heat.

[0072] In this embodiment, when the air source heat pump water heater is in cooling mode, the gaseous refrigerant discharged by the compressor 2 is transported to the outdoor heat exchanger 3 through the four-way valve 1. After a heat dissipation and condensation process, it is transported to the throttling valve 8 for throttling, cooling, and pressure reduction, becoming low-pressure refrigerant. It then enters the refrigerant pipeline of the indoor heat exchanger 5 for heat absorption and evaporation (heat exchange occurs through the fluid medium in the heat exchange pipeline), and then returns to the compressor 2 through the four-way valve 1 for compression, repeating the cycle. During this process, the outdoor heat exchanger 3 acts as the condenser, dissipating heat from the refrigerant, while the indoor heat exchanger 5 acts as the evaporator, absorbing heat from the refrigerant. When the outdoor ambient temperature is too high, the outdoor air temperature driven by the outdoor fan 9 will also rise. This will cause the heat exchange efficiency of the outdoor heat exchanger 3 to be abnormally low. Therefore, the solenoid valve 7 is energized to open the auxiliary pipeline, so that the low-temperature hot water at the outlet flows to the guide water tank 4, and then flows along the small holes in the guide water tank 4 to the outdoor heat exchanger 3 to absorb the heat of the outdoor heat exchanger 3 and assist in cooling it. At this time, the outdoor heat exchanger 3 exchanges heat through the liquid medium and the fan at the same time, thereby significantly improving its heat exchange efficiency. This avoids the high pressure protection or system pressure frequency limitation that may occur when cooling in a high outdoor environment, and improves the safety and reliability of the air source heat pump water system.

[0073] Conversely, when the air source heat pump water heater is in heating mode, the gaseous refrigerant discharged from the compressor 2 is transported to the refrigerant management section of the indoor heat exchanger 5 via the four-way valve 1. After undergoing a heat dissipation and condensation process (heat exchange through the fluid medium in the heat exchange pipeline), it is transported to the throttling valve 8 for throttling, cooling, and pressure reduction, becoming low-pressure refrigerant. It then enters the outdoor heat exchanger 3 for heat absorption and evaporation, before returning to the compressor 2 via the four-way valve 1 for compression, repeating the cycle. In this process, the indoor heat exchanger 5 acts as the condenser, dissipating heat from the refrigerant, while the outdoor heat exchanger 3 acts as the evaporator, absorbing heat from the refrigerant. When the outdoor ambient temperature is too low, the outdoor air temperature driven by the outdoor fan 9 will also decrease, causing the outdoor heat exchanger 3 to defrost, resulting in abnormally low heat exchange efficiency. Therefore, the solenoid valve 7 is energized to open the auxiliary pipeline, allowing the high-temperature hot water at the outlet to flow to the guide water channel 4, and then flow along the small holes in the guide water channel 4 to the outdoor heat exchanger 3, dissipating heat to help defrost the outdoor heat exchanger 3 and assisting in heating it. At this time, the outdoor heat exchanger 3 simultaneously exchanges heat through the liquid medium and the fan, thereby significantly improving its heat exchange efficiency. This avoids the problem of the outdoor heat exchanger frosting due to heating in low outdoor temperatures, which would affect the heating capacity and cause a significant reduction in heating performance. In addition, since this embodiment does not require switching the four-way valve direction for defrosting, it avoids the interruption of continuous heating and will not affect the user's comfort experience.

[0074] This embodiment provides an air-source heat pump water heater that overcomes the technical problem of low heat exchange efficiency of the outdoor heat exchanger in existing technologies when outdoor ambient temperatures are harsh. This embodiment improves upon existing air-source heat pump water heaters by adding a guide water channel above the outdoor heat exchanger. This guide water channel is connected to the outlet of the heat exchange pipe of the indoor heat exchanger to form an auxiliary pipeline. A solenoid valve is added to this auxiliary pipeline. When outdoor ambient temperatures are harsh, the solenoid valve is energized to open the auxiliary pipeline, diverting a portion of the hot water from the outlet to the outdoor heat exchanger to aid in heat exchange. This effectively utilizes the circulation advantage of the hot water, improving the heat exchange efficiency of the outdoor heat exchanger and avoiding increased system energy consumption and negative user experience issues caused by low heat exchange efficiency. This achieves energy saving and consumption reduction, and improves the user experience.

[0075] Reference Figure 2 , Figure 2 This is a schematic diagram of the hardware structure involved in the operation of an embodiment of the present invention.

[0076] like Figure 2As shown, the hardware can be an air conditioner, which may include: a processor 1001, such as a central processing unit (CPU), a communication bus 1002, a user interface 1003, a network interface 1004, and a memory 1005. The communication bus 1002 is used to enable communication between these components. The user interface 1003 may include a display screen and an input unit such as a keyboard; optionally, the user interface 1003 may also include a standard wired interface or a wireless interface. The network interface 1004 may optionally include a standard wired interface or a wireless interface (such as a Wi-Fi interface). The memory 1005 may be a high-speed random access memory (RAM) or a stable non-volatile memory (NVM), such as a disk drive. The memory 1005 may also optionally be a storage device independent of the aforementioned processor 1001.

[0077] Those skilled in the art will understand that Figure 2 The structure shown does not constitute a limitation on the air conditioner and may include more or fewer components than shown, or combine certain components, or have different component arrangements.

[0078] like Figure 2 As shown, the memory 1005, which serves as a storage medium, may include an operating system, a data storage module, a network communication module, a user interface module, and a control program for an air source heat pump water heater.

[0079] exist Figure 2 In the air conditioner shown, the network interface 1004 is mainly used for data communication with other devices; the user interface 1003 is mainly used for data interaction with the user; the processor 1001 and the memory 1005 in the air conditioner of the present invention can be set in the air conditioner. The air conditioner calls the control program of the air source heat pump water machine stored in the memory 1005 through the processor 1001 and executes the relevant steps of the control method of the air source heat pump water machine in the following embodiments.

[0080] This invention also provides a control method for an air source heat pump water heater, applicable to the aforementioned air source heat pump water heater.

[0081] Reference Figure 3 , Figure 3 This is a flowchart illustrating an embodiment of the control method for an air-source heat pump water heater according to the present invention.

[0082] In this embodiment, the control method of the air source heat pump water heater includes:

[0083] Step S10: Obtain the operating status of the outdoor heat exchanger;

[0084] It should be noted that, in this embodiment, the executing entity is the processor in the air conditioner containing the aforementioned air source heat pump water heater. The operating state of the outdoor heat exchanger can be normal state, high-efficiency state, energy-saving state, dormant state, or abnormal state.

[0085] It is understood that the normal state means that the outdoor heat exchanger is operating normally. At this time, it is considered that the heat exchange efficiency of the outdoor heat exchanger is normal and the system energy consumption of the air source heat pump water machine is normal.

[0086] The high-efficiency state indicates that the outdoor heat exchanger is operating efficiently. For example, when the air conditioner starts the strong mode, the outdoor heat exchanger will enter the high-efficiency state. At this time, the heat exchange efficiency of the outdoor heat exchanger is high, and the system energy consumption of the air source heat pump water machine is relatively high.

[0087] The energy-saving state indicates that the outdoor heat exchanger does not need to perform much heat exchange and only needs to maintain operation without stopping. At this time, the heat exchange efficiency of the outdoor heat exchanger is low and the system energy consumption of the air source heat pump water machine is low.

[0088] The dormant state indicates that the outdoor heat exchanger has stopped working. For example, after the air conditioner stops running for a certain period of time, the outdoor heat exchanger will also stop working.

[0089] The abnormal state indicates that the outdoor heat exchanger is malfunctioning. At this time, the system is not set to energy-saving mode, but to normal or high-efficiency mode. The outdoor heat exchanger may be affected by outdoor environmental factors, resulting in low heat exchange efficiency and failure to meet the system's heat exchange requirements. It requires more time to exchange heat, which in turn leads to high system energy consumption of the air source heat pump water heater.

[0090] As an example, in this embodiment, step S10 includes: obtaining the operating mode of the air source heat pump water heater, and obtaining the operating status of the outdoor heat exchanger according to the operating mode.

[0091] It should be noted that in this embodiment, the air source heat pump water heater operates in both cooling and heating modes. In different operating modes, the indoor and outdoor heat exchangers play different roles, as described above. Figure 1 An embodiment of the air source heat pump water heater is described.

[0092] Step S20: Determine whether the operating status of the outdoor heat exchanger meets the preset conditions;

[0093] It should be noted that the preset condition refers to the outdoor heat exchanger operating in an abnormal state. That is, when the outdoor heat exchanger is operating in an abnormal state, it is considered to meet the preset condition, and further operations are required to remove it from the current abnormal state. The abnormal state includes both the abnormal state of the air source heat pump water heater operating in cooling mode and the abnormal state of the air source heat pump water heater operating in heating mode. The common feature is that the heat exchange efficiency of the outdoor heat exchanger is abnormally low.

[0094] Step S30: If the operating status of the outdoor heat exchanger meets the preset conditions, then the solenoid valve is energized to make the auxiliary pipeline open.

[0095] It is understandable that when the outdoor heat exchanger is in an abnormal state, it is necessary to help it get out of the abnormal state. In this embodiment, the auxiliary pipeline is opened by energizing the solenoid valve, so that part of the hot water from the outlet can flow through the auxiliary pipeline to the guide water tank, and then flow along the multiple small holes on the guide water tank to the outdoor heat exchanger, assisting the outdoor heat exchanger in heat exchange and improving its heat exchange efficiency.

[0096] As an example, in this embodiment, after step S20, the method further includes: if the operating state of the outdoor heat exchanger does not meet the preset conditions, then de-energize the solenoid valve to shut off the auxiliary pipeline.

[0097] It is understandable that when the outdoor heat exchanger is not in an abnormal state, i.e., in a normal state, high-efficiency state, energy-saving state, or dormant state, it means that the heat exchange efficiency of the outdoor heat exchanger is not abnormal. In this case, it can continue to perform heat exchange according to the current heat exchange method, i.e., heat exchange based on the outdoor fan, without the need to introduce water flow through auxiliary pipelines to help adjust its heat exchange efficiency.

[0098] This embodiment provides a control method for an air-source heat pump water heater, overcoming the technical problem of low heat exchange efficiency of the outdoor heat exchanger under harsh outdoor ambient temperatures in existing technologies. When the outdoor heat exchanger's operating state meets preset conditions, i.e., its heat exchange efficiency is abnormally low, this embodiment energizes the solenoid valve to open the auxiliary pipeline, allowing some of the hot water from the outlet to flow through the auxiliary pipeline into the guide water trough, and then along multiple small holes in the guide water trough to the outdoor heat exchanger, assisting the outdoor heat exchanger in heat exchange and improving its heat exchange efficiency. When the outdoor heat exchanger temperature is too high, the low-temperature hot water from the auxiliary pipeline can fall onto the outdoor heat exchanger through the small holes in the guide water trough to help cool it down; when the outdoor heat exchanger temperature is too low, the high-temperature hot water from the auxiliary pipeline can fall onto the outdoor heat exchanger through the small holes in the guide water trough to help defrost it. This embodiment effectively utilizes the advantages of hot water circulation, improves the heat exchange efficiency of the outdoor heat exchanger, avoids the problem of increased system energy consumption and negative impact on user experience caused by low heat exchange efficiency, achieves energy saving and consumption reduction, and improves the user experience.

[0099] Furthermore, refer to Figure 4 Another embodiment of the control method for the air source heat pump water heater of the present invention is proposed, based on the above. Figure 3 In the illustrated embodiment, step S20 includes:

[0100] Step A20: When the air source heat pump water heater is in heating mode, dynamically acquire the coil temperature of the outdoor heat exchanger and determine whether the coil temperature of the outdoor heat exchanger is not greater than the first temperature threshold.

[0101] Step A21: If the coil temperature of the outdoor heat exchanger is not greater than the first temperature threshold, then the operating status of the outdoor heat exchanger is determined to meet the preset conditions.

[0102] As an example, in this embodiment, step A20 is followed by:

[0103] Step A22: If the coil temperature of the outdoor heat exchanger is greater than the first temperature threshold, it is determined that the operating status of the outdoor heat exchanger does not meet the preset conditions.

[0104] It is understandable that when the air source heat pump water heater is in heating mode, the outdoor heat exchanger acts as the evaporator for heat dissipation. When the outdoor ambient temperature is low, the coil temperature of the outdoor heat exchanger will gradually decrease as the heat dissipation process proceeds until defrosting occurs. In this embodiment, a more direct method for determining defrosting is provided: the coil temperature of the outdoor heat exchanger is obtained and compared with a preset first temperature threshold to determine whether defrosting has occurred. In this embodiment, the first temperature threshold can be -1 degree Celsius, or 0 degrees Celsius, -0.5 degrees Celsius, or other reasonable values. A duration can also be set; for example, if the coil temperature of the outdoor heat exchanger remains below the first temperature threshold for 1 minute (or half a minute, 2 minutes, etc., where 1 minute is not a limitation of this embodiment), then defrosting is considered to have occurred. At this time, the heat exchange efficiency of the outdoor heat exchanger will be significantly reduced due to defrosting, i.e., it enters an abnormal state, which meets the preset conditions explained in the above embodiment. Conversely, if the coil temperature of the outdoor heat exchanger is greater than the first temperature threshold, it indicates that the outdoor heat exchanger has not defrosted and its heat exchange efficiency will not be significantly reduced. Therefore, it has not entered an abnormal state and does not meet the preset conditions explained in the above embodiments.

[0105] This embodiment provides a control method for an air source heat pump water heater. Specifically, it provides a method for obtaining the operating status of the outdoor heat exchanger when the air source heat pump water heater is in heating mode, and for determining whether the operating status of the outdoor heat exchanger meets preset conditions. In this embodiment, by setting a first temperature threshold for comparison with the coil temperature of the outdoor heat exchanger, it is easier to determine whether the operating status of the outdoor heat exchanger is abnormal. This helps determine whether it is necessary to activate the auxiliary pipeline to assist the outdoor heat exchanger in defrosting, avoiding the continuous interruption of heating caused by switching the four-way valve for defrosting, which would affect the user's comfort experience.

[0106] Furthermore, refer to Figure 5 This paper proposes another embodiment of the control method for the air source heat pump water heater of the present invention, based on the above. Figure 3 In the embodiment shown, step S20 further includes:

[0107] Step B20: When the air source heat pump water heater is in cooling mode, dynamically acquire the outdoor ambient temperature and determine whether the outdoor ambient temperature is not less than the second temperature threshold.

[0108] Step B21: If the outdoor ambient temperature is not less than the second temperature threshold, then obtain the coil temperature of the outdoor heat exchanger and the water temperature at the outlet.

[0109] Step B30: Determine whether the coil temperature of the outdoor heat exchanger is greater than the water temperature at the outlet.

[0110] Step B31: If the coil temperature of the outdoor heat exchanger is greater than the water temperature at the outlet, then the operating status of the outdoor heat exchanger is determined to meet the preset conditions.

[0111] It is understandable that when the air source heat pump water heater is in cooling mode, the outdoor heat exchanger acts as the condenser to absorb heat. When the outdoor ambient temperature is high, the coil temperature of the outdoor heat exchanger will gradually increase as the heat absorption process proceeds, until a high-pressure protection situation may occur. In this embodiment, a more direct way to determine this situation is to first obtain the outdoor ambient temperature and compare it with a preset second temperature threshold to determine whether a high-pressure protection situation may occur. In this embodiment, the second temperature threshold can be 25 degrees Celsius, or other reasonable values ​​such as 27 degrees Celsius, 30 degrees Celsius, etc. A duration can also be set, for example, if the outdoor ambient temperature remains above the second temperature threshold for 1 minute (or half a minute, 2 minutes, etc., where 1 minute is not a limitation of this embodiment), then it is determined that high-pressure protection may occur, requiring further judgment. Specifically, the coil temperature of the outdoor heat exchanger and the water temperature at the outlet are obtained. By comparing the coil temperature and the outlet water temperature, a conclusion is drawn as to whether the outdoor heat exchanger needs to use the hot water from the outlet for heat exchange to assist in cooling. Obviously, if the coil temperature of the outdoor heat exchanger is greater than the outlet water temperature, the heat exchange efficiency of the outdoor heat exchanger will be significantly reduced due to high-pressure protection, i.e., it enters an abnormal state, meeting the preset conditions explained in the above embodiment. Therefore, the hot water from the outlet can help the outdoor heat exchanger cool down.

[0112] As an example, in this embodiment, step B20 is followed by:

[0113] Step B22: If the outdoor ambient temperature is less than the second temperature threshold, it is determined that the operating status of the outdoor heat exchanger does not meet the preset conditions.

[0114] It is understandable that if the outdoor ambient temperature is less than the second temperature threshold, it means that the outdoor heat exchanger will not experience excessively high coil temperature even if it only uses the outdoor fan to drive the outdoor air for heat exchange, and its heat exchange efficiency will not be significantly reduced. Therefore, it has not entered an abnormal state and does not meet the preset conditions explained in the above embodiments.

[0115] As an example, in this embodiment, step B30 is followed by:

[0116] Step B32: If the coil temperature of the outdoor heat exchanger is not greater than the water temperature at the outlet, then it is determined that the operating status of the outdoor heat exchanger does not meet the preset conditions.

[0117] It is understandable that if the outdoor ambient temperature is not less than the second temperature threshold, but the coil temperature of the outdoor heat exchanger is not greater than the water temperature at the outlet, it means that the outdoor heat exchanger can still perform stable heat exchange based solely on the outdoor fan. If the hot water from the outlet is guided to the guide water tank via an auxiliary pipeline and then flows to the outdoor heat exchanger, it will affect its heat exchange efficiency. Therefore, in this case, it is considered that the operating state of the outdoor heat exchanger does not meet the preset conditions.

[0118] This embodiment provides a control method for an air source heat pump water heater. Specifically, it provides a method for obtaining the operating status of the outdoor heat exchanger when the air source heat pump water heater is in cooling mode, and for determining whether the operating status of the outdoor heat exchanger meets preset conditions. In this embodiment, by setting a second temperature threshold for comparison with the outdoor ambient temperature, it is easier to determine whether the operating status of the outdoor heat exchanger may be abnormal. This helps to determine whether it is necessary to activate the auxiliary pipeline to help cool the outdoor heat exchanger, avoiding problems such as high pressure protection or system pressure frequency limiting in high-temperature cooling environments, thus improving system safety and reliability.

[0119] Furthermore, embodiments of the present invention also propose an air conditioner and a readable storage medium, wherein the air conditioner and the readable storage medium store a control program for an air source heat pump water heater, and the control program for the air source heat pump water heater is executed by a processor using the relevant steps of any embodiment of the control method for the air source heat pump water heater described above.

[0120] It should be noted that, in this document, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or system that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or system. Unless otherwise specified, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or system that includes that element.

[0121] The sequence numbers of the above embodiments of the present invention are for descriptive purposes only and do not represent the superiority or inferiority of the embodiments.

[0122] Through the above description of the embodiments, those skilled in the art can clearly understand that the methods of the above embodiments can be implemented by means of software plus necessary general-purpose hardware platforms. Of course, they can also be implemented by hardware, but in many cases the former is a better implementation method. Based on this understanding, the technical solution of the present invention, in essence, or the part that contributes to the prior art, can be embodied in the form of a software product. The air conditioner and the software product are stored in a storage medium (such as ROM / RAM, magnetic disk, optical disk) as described above, including several instructions to cause a terminal device (which may be a mobile phone, an air conditioner, a server, or a network device, etc.) to execute the methods described in the various embodiments of the present invention.

[0123] The above are merely preferred embodiments of the present invention and do not limit the scope of the patent. Any equivalent structural or procedural transformations made based on the description and drawings of the present invention, or direct or indirect applications in other related technical fields, are similarly included within the scope of patent protection of the present invention.

Claims

1. An air source heat pump water machine characterized by, The air source heat pump water machine comprises: a four-way valve; a compressor, the input end and the output end of which are communicated with the four-way valve; an outdoor heat exchanger, which is communicated with the four-way valve; a flow guide water tank, which is fixedly connected to the upper portion of the outdoor heat exchanger; an indoor heat exchanger, which comprises a refrigerant pipeline and a heat exchange pipeline, the refrigerant pipeline being communicated with the four-way valve; a circulating water pump, which is arranged at the water inlet of the heat exchange pipeline; an auxiliary pipeline, which is respectively communicated with the water outlet of the heat exchange pipeline and the flow guide water tank; an electromagnetic valve, which is arranged in the auxiliary pipeline; when the operating state of the outdoor heat exchanger meets the preset condition, the electromagnetic valve is energized, the auxiliary pipeline is turned on, part of the heat exchange water at the water outlet flows into the flow guide water tank through the auxiliary pipeline, and then flows onto the outdoor heat exchanger through the small holes on the flow guide water tank; wherein, the preset condition is that when the air source heat pump water machine is in the heating mode, the coil temperature of the outdoor heat exchanger is not greater than a first temperature threshold; when the air source heat pump water machine is in the cooling mode, the outdoor environment temperature is not less than a second temperature threshold and the coil temperature of the outdoor heat exchanger is greater than the water temperature at the water outlet, and the first temperature threshold is less than the second temperature threshold.

2. The air source heat pump water machine of claim 1, wherein, The air source heat pump water machine further comprises: a throttling valve, which is respectively communicated with the outdoor heat exchanger and the refrigerant pipeline; the four-way valve, the outdoor heat exchanger, the throttling valve and the refrigerant pipeline of the indoor heat exchanger together constitute a refrigerant passage.

3. The air source heat pump water machine of claim 1, wherein, The air source heat pump water machine further comprises: an outdoor fan, which is used to drive the outdoor air to pass through the outdoor heat exchanger.

4. The air source heat pump water machine of claim 1, wherein, when the air source heat pump water machine is in the cooling mode, the flow guide water tank is used to assist the outdoor heat exchanger to dissipate heat; when the air source heat pump water machine is in the heating mode, the flow guide water tank is used to assist the outdoor heat exchanger to absorb heat.

5. A control method of an air source heat pump water machine, characterized by, The control method of the air source heat pump water machine is applied to the air source heat pump water machine of any one of claims 1-4, and the steps of the control method of the air source heat pump water machine comprise: acquiring the operating state of the outdoor heat exchanger; judging whether the operating state of the outdoor heat exchanger meets the preset condition; if the operating state of the outdoor heat exchanger meets the preset condition, energizing the electromagnetic valve to turn on the auxiliary pipeline.

6. The control method of an air source heat pump water machine according to claim 5, wherein, The step of acquiring the operating state of the outdoor heat exchanger comprises: acquiring the operating mode of the air source heat pump water machine, and acquiring the operating state of the outdoor heat exchanger according to the operating mode.

7. The control method of an air source heat pump water machine according to claim 6, wherein, The step of judging whether the operating state of the outdoor heat exchanger meets the preset condition comprises: when the operating mode of the air source heat pump water machine is the heating mode, dynamically acquiring the coil temperature of the outdoor heat exchanger, and judging whether the coil temperature of the outdoor heat exchanger is not greater than a first temperature threshold; if the coil temperature of the outdoor heat exchanger is not greater than the first temperature threshold, it is determined that the operating state of the outdoor heat exchanger meets the preset condition.

8. The control method of an air source heat pump water machine according to claim 6, wherein, The step of judging whether the operation state of the outdoor heat exchanger meets the preset condition further comprises: When the operation mode of the air source heat pump water machine is the cooling mode, dynamically obtaining an outdoor environment temperature, and judging whether the outdoor environment temperature is not less than a second temperature threshold; If the outdoor environment temperature is not less than the second temperature threshold, obtaining a coil temperature of the outdoor heat exchanger and a water temperature of the water outlet; Judging whether the coil temperature of the outdoor heat exchanger is greater than the water temperature of the water outlet; If the coil temperature of the outdoor heat exchanger is greater than the water temperature of the water outlet, it is determined that the operation state of the outdoor heat exchanger meets the preset condition.

9. An air conditioner characterized by comprising: The air conditioner comprises a memory, a processor, and a control program of the air source heat pump water machine stored on the memory and capable of running on the processor, and the control program of the air source heat pump water machine, when executed by the processor, implements the steps of the control method of the air source heat pump water machine according to any one of claims 5 to 8.

10. A computer-readable storage medium, characterized in that, The computer readable storage medium stores the control program of the air source heat pump water machine, and the control program of the air source heat pump water machine, when executed by the processor, implements the steps of the control method of the air source heat pump water machine according to any one of claims 5 to 8.

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