Water temperature control method and device, storage medium and air energy water heater

Abstract

The invention discloses a water temperature control method and device, a storage medium and an air energy water heater, and relates to the technical field of water heaters. Based on the water flow switch state, the operation state of the air energy water heater is judged; receiving upper water temperature and lower water temperature of the water tank; and based on the running state, the upper water temperature or the lower water temperature serves as a control anchor point, the compressor is controlled to run at the preset frequency, and the air energy water heater is made to be in an energy efficiency priority mode. The energy efficiency of the air energy water heater can be improved.

Description

Technical Field

[0001] The present application relates to the technical field of water heaters, and in particular to a water temperature control method, device, storage medium and air-energy water heater. Background Art

[0002] Air-energy water heaters usually use pressurized water tanks. During the heating process of the air-energy water heater, reasonable control of the operating frequency of the compressor plays an important role in the energy efficiency of the air-energy water heater.

[0003] At present, the related art controls the operating frequency of the compressor fixedly according to the water temperature at the upper part of the water tank in the air-energy water heater, which cannot reasonably control the operating frequency of the compressor. The compressor will often run at a higher frequency, resulting in poor energy efficiency of the air-energy water heater. Summary of the Invention

[0004] The embodiments of the present application provide a water temperature control solution that can effectively improve the energy efficiency of air-source water heaters.

[0005] The embodiments of this application provide the following technical solutions:

[0006] According to one embodiment of the present application, a water temperature control method is applicable to an air-energy water heater, which includes a water tank and a compressor. The method includes: receiving the water flow switch status of the water inlet pipe of the water tank; judging the operating status of the air-energy water heater based on the water flow switch status; receiving the upper water temperature and the lower water temperature of the water tank; based on the operating status, using the upper water temperature or the lower water temperature as a control anchor point, controlling the compressor to operate at a preset frequency, so that the air-energy water heater is in an energy efficiency priority mode.

[0007] According to one embodiment of the present application, a water temperature control device is suitable for an air-energy water heater, wherein the air-energy water heater includes a water tank and a compressor. The water temperature control device includes a memory and a processor, wherein the memory stores a computer program, and the processor is used to read the computer program stored in the memory to execute: receiving the water flow switch status of the water inlet pipe of the water tank; judging the operating status of the air-energy water heater based on the water flow switch status; receiving the upper water temperature and the lower water temperature of the water tank; and based on the operating status, using the upper water temperature or the lower water temperature as a control anchor point, controlling the compressor to operate at a preset frequency, so that the air-energy water heater is in an energy efficiency priority mode.

[0008] According to another embodiment of the present application, a storage medium stores a computer program thereon. When the computer program is executed by a processor of a water temperature control device, the computer executes the method described in the embodiment of the present application.

[0009] According to another embodiment of the present application, an air-energy water heater may include the water temperature control device described in the embodiment of the present application.

[0010] According to another embodiment of the present application, a computer program product or computer program includes computer instructions stored in a computer-readable storage medium. A processor of a water temperature control device reads the computer instructions from the computer-readable storage medium and executes the computer instructions, causing the water temperature control device to perform the methods provided in the various optional implementations described in the embodiments of the present application.

[0011] The water temperature control method in the embodiment of the present application is applicable to an air-energy water heater, which includes a water tank and a compressor. The method includes: receiving the water flow switch status of the water inlet pipe of the water tank; judging the operating status of the air-energy water heater based on the water flow switch status; receiving the upper water temperature and the lower water temperature of the water tank; and based on the operating status, using the upper water temperature or the lower water temperature as a control anchor point, controlling the compressor to operate at a preset frequency, so that the air-energy water heater is in an energy efficiency priority mode.

[0012] In the manner of the embodiment of the present application, based on the water flow switch status of the water inlet pipe of the water tank, the water inlet situation at the bottom of the water tank can be considered to judge the operating status of the air-energy water heater, and the upper water temperature or the lower water temperature can be selected as the control anchor point according to the operating status. In different operating states and in the process of switching between different operating states, the corresponding preset frequency of the compressor operation can be more reasonably controlled according to the selected control anchor point, ensuring that the compressor is in a more energy-efficient mode in each operating state and in the process of switching between different operating states, thereby improving the energy efficiency of the air-energy water heater. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present application. For those skilled in the art, other drawings can be obtained based on these drawings without creative work.

[0014] Figure 1 A flow chart of a water temperature control method according to an embodiment of the present application is shown.

[0015] Figure 2 A system diagram of an air-energy water heater according to an embodiment of the present application is shown.

[0016] Figure 3 A block diagram of a water temperature control device according to an embodiment of the present application is shown.

[0017] Figure 4 A block diagram of an air-energy water heater according to an embodiment of the present application is shown. DETAILED DESCRIPTION

[0018] The present disclosure will be further described in detail below in conjunction with the accompanying drawings and examples. It should be understood that the examples provided herein are merely for explaining the present disclosure and are not intended to limit the present disclosure. In addition, the examples provided below are partial examples for implementing the present disclosure, rather than providing all examples for implementing the present disclosure. In the absence of conflict, the technical solutions described in the examples of the present disclosure may be implemented in any combination.

[0019] It should be noted that, in the embodiments of the present disclosure, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a method or apparatus comprising a series of elements includes not only the elements explicitly stated, but also other elements not explicitly listed, or also includes elements inherent to the implementation of the method or apparatus. In the absence of further restrictions, an element defined by the sentence "comprising a ..." does not exclude the presence of other related elements (such as steps in the method or units in the apparatus, for example, a unit may be part of a circuit, part of a processor, part of a program or software, etc.) in the method or apparatus comprising the element.

[0020] For example, the water temperature control method provided in the embodiment of the present disclosure includes a series of steps, but the water temperature control method provided in the embodiment of the present disclosure is not limited to the recorded steps. Similarly, the water temperature control device provided in the embodiment of the present disclosure includes a series of units, but the device provided in the embodiment of the present disclosure is not limited to including the units explicitly recorded, and may also include units that need to be set up to obtain relevant information or perform processing based on information.

[0021] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which the present disclosure pertains. The terms used herein are for the purpose of describing specific embodiments only and are not intended to limit the present disclosure.

[0022] It is understandable that in the specific implementation of this application, relevant data is involved. When the embodiments in this application are applied to specific products or technologies, user permission or consent is required, and the collection, use and processing of relevant data must comply with relevant laws, regulations and standards.

[0023] Figure 1A flowchart schematically illustrates a water temperature control method according to an embodiment of the present application. The method may be executed by a water temperature control device with processing capabilities. The water temperature control device may be installed in a device such as an air-energy water heater, a mobile phone, a computer, a smartwatch, or a household appliance. The water temperature control device may include at least a memory and a processor.

[0024] In a specific embodiment of the present application, the water temperature control device serving as the executor of the water temperature control method is specifically located in the air-energy water heater. The water temperature control device may include a processor and a memory. The memory stores a computer program. The processor can read the computer program stored in the memory to execute the methods of each embodiment of the present application.

[0025] Figure 2 The frame structure diagram of an air energy water heater according to an embodiment of the present application is schematically shown. Figure 2 As shown, the air-energy water heater 200 may include at least a water tank 210 and a compressor 220. In addition, the air-energy water heater 200 may also include: an upper water tank temperature sensor 230, a lower water tank temperature sensor 240, a fin heat exchanger 250, an ambient temperature sensor 260, an exhaust temperature sensor 270, a return air temperature sensor 280, an electronic expansion valve 290, a first filter 2100, a second filter 2110, a four-way valve 2120, a fan assembly 2130, a coil temperature sensor 2140, a low-pressure switch 2150, a high-pressure switch 2160, a water inlet pipe 2170, a water flow switch 2180 and a water outlet pipe 2190.

[0026] like Figure 1 As shown, the water temperature control method may include steps S110 to S140.

[0027] Step S110, receiving the water flow switch status of the water inlet pipe of the water tank;

[0028] Step S120, judging the operating state of the air-energy water heater based on the state of the water flow switch;

[0029] Step S130, receiving the upper water temperature and the lower water temperature of the water tank;

[0030] Step S140 , based on the operating status, using the upper water temperature or the lower water temperature as a control anchor point, controls the compressor to operate at a preset frequency, so that the air energy water heater is in an energy efficiency priority mode.

[0031] In the embodiment of the present application, the upper part of the water tank may be provided with Figure 2 The upper water tank temperature sensor 230 shown in FIG. 2 can be set at the lower part of the water tank 210 as shown in FIG. Figure 2The lower water tank temperature sensor 240 is shown, and a water flow switch 2180 can be provided at the water inlet pipe 2170 of the water tank 210. The upper water tank temperature sensor 230 can receive the upper water temperature (i.e., the water temperature at the top of the water tank) in real time, while the lower water tank temperature sensor 240 can receive the lower water temperature (i.e., the water temperature at the bottom of the water tank) in real time. The water flow switch status of the water flow switch 2180 can also be received in real time. The water flow switch status can include a first state and a second state, which are two opposite states. For example, the first state is when the water flow switch is off, and the second state is when the water flow is closed.

[0032] The water flow switch status can accurately reflect the water inflow situation at the bottom of the water tank. Based on the water flow switch status, the water inflow situation at the bottom of the water tank can be considered to accurately determine the operating state of the air-energy water heater. The operating state can include a first heating state or a second heating state. In the first heating state, the user stops using the water in the air-energy water heater (i.e., the air-energy water heater is in the water-off stage). In the second heating state, the user uses the water in the air-energy water heater (i.e., the air-energy water heater is in the water-draining stage).

[0033] After the operating state is determined based on the state of the water flow switch, the upper water temperature or the lower water temperature is selected as the control anchor point according to the operating state. In different operating states and in the process of switching between different operating states, the compressor operation can be more reasonably controlled according to the selected control anchor point to the corresponding preset frequency, so that the air-energy water heater is in energy efficiency priority mode, ensuring that the water heater unit has better energy efficiency in each operating state and in the process of switching between different operating states.

[0034] In summary, in the manner of the embodiments of the present application, based on the water flow switch status of the water inlet pipe of the water tank, the water inlet situation at the bottom of the water tank can be considered to judge the operating status of the air-energy water heater, and the upper water temperature or the lower water temperature can be selected as the control anchor point according to the operating status. In different operating states and in the process of switching between different operating states, the corresponding preset frequency of the compressor operation can be more reasonably controlled according to the selected control anchor point, ensuring that the compressor is in a more energy-efficient mode in each operating state and in the process of switching between different operating states, thereby improving the energy efficiency of the air-energy water heater.

[0035] Described below Figure 1 When water temperature control is performed under the embodiment, further optional specific embodiments are provided for each step performed.

[0036] In one embodiment, in step S130, based on the water flow switch state, the operating state of the air-energy water heater is judged, which may include: judging whether the water flow switch state is the first state; if the water flow switch state is the first state, judging that the operating state of the air-energy water heater is the first heating state; correspondingly, in step S140, based on the operating state, using the upper water temperature or the lower water temperature as the control anchor point, controlling the compressor to run at a preset frequency, so that the air-energy water heater is in an energy efficiency priority mode, including: based on the first heating state, using the upper water temperature as the control anchor point, controlling the compressor to run at a preset first heating state frequency, so that the air-energy water heater is in an energy efficiency priority mode.

[0037] In this embodiment, if the water flow switch is in the first state, it indicates that the water flow in the water inlet pipe is stagnant or the flow rate is too low. At this time, it can be determined that the operating state of the air-energy water heater is the first heating state. For example, the water flow switch state in the first state may be the water flow switch being disconnected, which indicates that the water flow in the water inlet pipe is stagnant or the flow rate is too low, thereby disconnecting the water flow switch and cutting off the switch circuit.

[0038] In the first heating state, the upper water temperature is specifically selected as the control anchor point to determine the preset first heating state frequency of the compressor that matches the control anchor point. Since the gap between the upper water temperature and the target water temperature (i.e., the set water temperature) is small, during the operation of the compressor, the gap between the upper water temperature and the target water temperature will gradually reduce the frequency, thereby reducing power consumption, thereby placing the air-energy water heater in a more energy-efficient operating condition. When the compressor is controlled to operate at the preset first heating state frequency, the air-energy water heater can be reliably placed in the energy efficiency priority mode in the first heating state. That is, the preset frequency in this embodiment specifically includes the preset first heating state frequency.

[0039] Furthermore, in one embodiment, judging the operating state of the air-energy water heater based on the water flow switch state may include: judging whether the upper water temperature meets the hysteresis temperature; if the upper water temperature does not meet the hysteresis temperature and the water flow switch state is the first state, then judging the operating state of the air-energy water heater to be the first heating state.

[0040] In this embodiment, if the upper water temperature does not meet the hysteresis temperature, it indicates that the upper water is not being output. If the water flow switch is in the first state, it indicates that the water flow is stagnant or the flow rate is too low. At this point, the air-energy water heater can be further accurately determined to be in the first heating state. The upper water temperature does not meet the hysteresis temperature, which means that the upper water tank temperature is greater than a predetermined temperature. The predetermined temperature = the set temperature - the hysteresis value, where the set temperature is the heating target temperature set for the air-energy water heater. For example, if the set temperature is 60 degrees and the hysteresis value is 5 degrees, the predetermined temperature is 55 degrees. If the upper water temperature is greater than 55 degrees, it is determined that the upper water temperature meets the hysteresis temperature.

[0041] Furthermore, in one embodiment, after receiving the upper water temperature of the water tank, the method may further include: receiving the ambient temperature; and adding different superheats as control anchor points at different ambient temperatures to ensure stable operation under different temperature conditions, such as low-temperature and frosting conditions. Correspondingly, based on the first heating state, using the upper water temperature as the control anchor point, controlling the compressor to operate at a preset first heating state frequency to put the air-energy water heater in an energy efficiency priority mode may include:

[0042] When the ambient temperature is greater than a preset ambient temperature value and the upper water temperature is greater than a preset water temperature value, determining a first preset exhaust superheat; and using the upper water temperature and the first preset exhaust superheat as a control anchor point, controlling the compressor to operate at a preset first frequency, so that the air-energy water heater is in an energy efficiency priority mode;

[0043] Alternatively, when the ambient temperature is greater than a preset ambient temperature value and the upper water temperature is less than or equal to a preset water temperature value, determining a second preset exhaust gas superheat; and using the upper water temperature and the second preset exhaust gas superheat as control anchor points, controlling the compressor to operate at a preset second frequency, so that the air energy water heater is in an energy efficiency priority mode;

[0044] Alternatively, when the ambient temperature is less than a preset ambient temperature value and the upper water temperature is greater than a preset water temperature value, determining a second preset exhaust gas superheat; and using the upper water temperature and the second preset exhaust gas superheat as control anchor points, controlling the compressor to operate at a preset third frequency, so that the air energy water heater is in an energy efficiency priority mode;

[0045] Alternatively, when the ambient temperature is less than or equal to the preset ambient temperature value and the upper water temperature is less than or equal to the preset water temperature value, the third preset exhaust superheat is determined; and, using the upper water temperature and the third preset exhaust superheat as control anchor points, the compressor is controlled to operate at a preset fourth frequency, so that the air-energy water heater is in energy efficiency priority mode; wherein the first preset exhaust superheat is greater than the second preset exhaust superheat, and the second preset exhaust superheat is greater than the third preset exhaust superheat.

[0046] In this embodiment, the following can be set near the fin heat exchanger 250: Figure 2 The ambient temperature sensor 260 shown can receive the ambient temperature in real time. A preset exhaust superheat is further determined based on the ambient temperature and the upper water temperature. The compressor is controlled to operate at a preset first heating state frequency based on the preset exhaust superheat determined by the upper water temperature. This can further ensure that the water heater unit operates at an energy-saving frequency and within a reasonable exhaust superheat range, further improving water temperature control reliability.

[0047] The matching preset exhaust superheat degree may include a first preset exhaust superheat degree, a second preset exhaust superheat degree, or a third preset exhaust superheat degree, wherein the first preset exhaust superheat degree is greater than the second preset exhaust superheat degree, and the second preset exhaust superheat degree is greater than the third preset exhaust superheat degree. For example, the first preset exhaust superheat degree is A+5°C, the second preset exhaust superheat degree is A°C, and the third preset exhaust superheat degree is A-5°C.

[0048] The preset first heating state frequency may specifically include a preset first frequency, a preset second frequency, a preset third frequency, or a preset fourth frequency. The preset first frequency is greater than the preset second frequency; the preset third frequency is greater than the preset fourth frequency. The specific values of these frequencies may be set based on actual conditions and are not specifically limited in this application.

[0049] In the first case, the ambient temperature is greater than the preset ambient temperature value (Ta℃), indicating that the water heater unit is in a frost-free zone, and the upper water temperature is greater than the water temperature preset value (Tw℃), indicating that the upper water temperature is high. At this time, the first preset exhaust superheat is determined (for example, A+5℃); and the upper water temperature and the first preset exhaust superheat are used as control anchor points to determine the preset first heating state first frequency that matches the control anchor point, and the compressor is controlled to run the preset first frequency, so that the air-energy water heater is reliably in energy efficiency priority mode in the first case.

[0050] Furthermore, in some embodiments, in the first case, a matching preset first opening can be determined based on the control anchor point, and the electronic expansion valve (eg Figure 2 The electronic expansion valve 290 shown in the figure is opened to the preset first opening. And, at the actual exhaust gas superheat (actual exhaust gas superheat = compressor exhaust gas temperature - upper water temperature, the compressor exhaust gas temperature can be as follows Figure 2 When the exhaust gas temperature sensor 270 shown in FIG. 1 reaches the first preset exhaust gas superheat, the actual exhaust gas superheat can be further adjusted according to the actual exhaust gas superheat (actual exhaust gas superheat = compressor suction temperature - upper water temperature, the compressor suction temperature can be as follows: Figure 2 The return air temperature sensor 280 shown is used to measure the return air temperature and fine-tune the electronic expansion valve to ensure that the system is in a balanced state.

[0051] In the second case, the ambient temperature is greater than the preset ambient temperature value (Ta℃), indicating that the water heater unit is in a frost-free zone, and the upper water temperature is less than or equal to the water temperature preset value (Tw℃), indicating that the upper water temperature is low. At this time, the second preset exhaust superheat (for example, A℃) is determined; and the upper water temperature and the second preset exhaust superheat are used as control anchor points to determine the preset second frequency that matches the control anchor point, and the compressor is controlled to operate at the preset second frequency, so that the air-energy water heater is reliably in energy efficiency priority mode in the second case.

[0052] Furthermore, in some embodiments, in the second case, a matching preset second opening can be determined based on the control anchor point, and the electronic expansion valve can be controlled to this preset second opening. Furthermore, when the actual exhaust gas superheat reaches the second preset exhaust gas superheat, the electronic expansion valve can be fine-tuned based on the actual intake gas superheat to ensure a balanced system.

[0053] In the third case, the ambient temperature is lower than the preset ambient temperature value (Ta℃), indicating that the water heater unit is in the frosting area, and the upper water temperature is higher than the water temperature preset value (Tw℃), indicating that the upper water temperature is higher. At this time, the second preset exhaust superheat (for example, A℃) is determined; and the upper water temperature and the second preset exhaust superheat are used as control anchor points to determine the preset third frequency that matches the control anchor point, and the compressor is controlled to operate at the preset third frequency, so that the air-energy water heater is reliably in the energy efficiency priority mode in the third case.

[0054] Furthermore, in some embodiments, in the third case, a matching preset third opening can be determined based on the control anchor point, and the electronic expansion valve can be controlled to the preset third opening. Furthermore, when the actual exhaust gas superheat reaches the second preset exhaust gas superheat, the electronic expansion valve can be fine-tuned based on the actual intake gas superheat to ensure a balanced system.

[0055] In the fourth case, the ambient temperature is less than or equal to the preset ambient temperature value (Ta℃), indicating that the water heater unit is in the frosting area, and the upper water temperature is less than or equal to the water temperature preset value (Tw℃), indicating that the upper water temperature is low. At this time, the third preset exhaust superheat is determined (for example, A-5℃); and the upper water temperature and the third preset exhaust superheat are used as control anchor points to control the compressor to operate at the preset fourth frequency, so that the air-energy water heater is reliably in the energy efficiency priority mode in the fourth case.

[0056] Furthermore, in some embodiments, in the fourth case, a matching preset fourth opening degree can be determined based on the control anchor point, and the electronic expansion valve can be controlled to the preset fourth opening degree. Furthermore, when the actual exhaust gas superheat reaches the third preset exhaust gas superheat degree, the electronic expansion valve can be fine-tuned based on the actual intake gas superheat to ensure a balanced system.

[0057] In one embodiment, in step S130, based on the water flow switch state, the operating state of the air-energy water heater is judged, which may include: judging whether the water flow switch state is the second state; if the water flow switch state is the second state, judging that the operating state of the air-energy water heater is the second heating state; correspondingly, in step S140, based on the operating state, using the upper water temperature or the lower water temperature as the control anchor point, controlling the compressor to run at a preset frequency, so that the air-energy water heater is in an energy efficiency priority mode, which may include: based on the second heating state, using the lower water temperature as the control anchor point, controlling the compressor to run at a preset second heating state frequency, so that the air-energy water heater is in an energy efficiency priority mode.

[0058] In this embodiment, if the water flow switch is in the second state, it indicates that the water flow rate in the water inlet pipe has reached a certain speed. At this time, it can be determined that the operating state of the air-energy water heater is the second heating state. For example, the water flow switch is in the second state, which means that the water flow switch is closed. Closing indicates that the water flow rate in the water inlet pipe has reached a certain speed, and the water flow switch is closed, thereby completing the circuit of the switch.

[0059] In the second heating state, the lower water temperature is specifically selected as the control anchor point to determine the preset second heating state frequency of the compressor that matches the control anchor point. Since the air-energy water heater is in the heating state in the second heating state, water is continuously replenished in the lower part of the water tank of the air-energy water heater, and the lower water temperature is relatively low and relatively stable, the operation of the compressor is controlled by using the lower water temperature as the control anchor point. This allows the compressor to continue to operate at a relatively stable frequency, with stable output power, and can quickly ensure that the user's water heat demand is met. In the case of combining the second heating state with the first heating state, the air-energy water heater can switch at any time according to the water use state, and the air-energy water heater can always adjust the compressor operating state according to the water use demand, thereby maintaining the energy efficiency priority mode of the entire machine. That is, the preset frequency in this embodiment specifically includes the preset second heating state frequency.

[0060] Furthermore, in one embodiment, judging the operating state of the air-energy water heater based on the water flow switch state may include: judging whether the upper water temperature meets the hysteresis temperature; if the upper water temperature meets the hysteresis temperature and the water flow switch state is the second state, then judging that the operating state of the air-energy water heater is the second heating state.

[0061] In this embodiment, if the upper water temperature meets the hysteresis temperature, it indicates that the upper water is being discharged. If the water flow switch is in the second state, it indicates that the water flow rate in the water inlet pipe has reached a certain speed. At this point, it can be further accurately determined that the operating state of the air-energy water heater is the second heating state. The upper water temperature meets the hysteresis temperature, which means that the upper water tank temperature is less than the predetermined temperature. The predetermined temperature = the set temperature - the hysteresis value, where the set temperature is the heating target temperature set for the air-energy water heater. For example, if the set temperature is 60 degrees and the hysteresis value is 5 degrees, then the predetermined temperature is 55 degrees. If the upper water temperature is greater than or equal to 55 degrees, it is determined that the upper water temperature does not meet the hysteresis temperature.

[0062] Furthermore, in one embodiment, after receiving the upper and lower water temperatures of the water tank, the method may further include: receiving the ambient temperature, and adding different superheats as control anchor points at different ambient temperatures to ensure stable operation under different temperature conditions, such as low-temperature and frosting conditions. Correspondingly, based on the second heating state, using the lower water temperature as the control anchor point, controlling the compressor to operate at a preset second heating state frequency to place the air-energy water heater in an energy efficiency priority mode may include:

[0063] When the ambient temperature is greater than a preset ambient temperature value and the lower water temperature is greater than a preset water temperature value, determining a first preset exhaust superheat; and using the lower water temperature and the first preset exhaust superheat as a control anchor point, controlling the compressor to operate at a preset fifth frequency, so that the air energy water heater is in an energy efficiency priority mode;

[0064] Alternatively, when the ambient temperature is greater than a preset ambient temperature value and the lower water temperature is less than or equal to a preset water temperature value, determining a second preset exhaust gas superheat; and using the lower water temperature and the second preset exhaust gas superheat as a control anchor point, controlling the compressor to operate at a preset sixth frequency, so that the air energy water heater is in an energy efficiency priority mode;

[0065] Alternatively, when the ambient temperature is less than or equal to a preset ambient temperature value and the lower water temperature is greater than a preset water temperature value, determining a second preset exhaust gas superheat; and using the lower water temperature and the second preset exhaust gas superheat as a control anchor point, controlling the compressor to operate at a preset seventh frequency, so that the air energy water heater is in an energy efficiency priority mode;

[0066] Alternatively, when the ambient temperature is less than or equal to the preset ambient temperature value and the lower water temperature is less than or equal to the preset water temperature value, the third preset exhaust superheat is determined; and, using the lower water temperature and the third preset exhaust superheat as control anchor points, the compressor is controlled to operate at a preset eighth frequency, so that the air-energy water heater is in energy efficiency priority mode; wherein the first preset exhaust superheat is greater than the second preset exhaust superheat, and the second preset exhaust superheat is greater than the third preset exhaust superheat.

[0067] In this embodiment, the following can be set near the fin heat exchanger 250: Figure 2 The ambient temperature sensor 260 shown can receive the ambient temperature in real time. A preset exhaust superheat is further determined based on the ambient temperature and the lower water temperature. The compressor is controlled to operate at a preset second heating state frequency based on the preset exhaust superheat determined by the lower water temperature. This ensures that the water heater unit operates at an energy-saving frequency and further enables the water heater unit to operate within a reasonable exhaust superheat range, further improving water temperature control reliability.

[0068] The matching preset exhaust superheat degree may include a first preset exhaust superheat degree, a second preset exhaust superheat degree, or a third preset exhaust superheat degree, wherein the first preset exhaust superheat degree is greater than the second preset exhaust superheat degree, and the second preset exhaust superheat degree is greater than the third preset exhaust superheat degree. For example, the first preset exhaust superheat degree is A+5°C, the second preset exhaust superheat degree is A°C, and the third preset exhaust superheat degree is A-5°C.

[0069] The preset second heating state frequency may specifically include a preset fifth frequency, a preset sixth frequency, a preset seventh frequency, or a preset eighth frequency. The preset fifth frequency is greater than the preset sixth frequency, and the preset seventh frequency is greater than the preset eighth frequency. The specific values of these frequencies may be set according to actual conditions and are not specifically limited in this application.

[0070] In the first case, the ambient temperature is greater than the preset ambient temperature value (Ta℃), indicating that the water heater unit is in a frost-free zone, and the lower water temperature is greater than the water temperature preset value (Tw℃), indicating that the lower water temperature is high. At this time, the first preset exhaust superheat is determined (for example, A+5℃); and the lower water temperature and the first preset exhaust superheat are used as control anchor points to determine the preset fifth frequency that matches the control anchor point, and the compressor is controlled to operate at the preset fifth frequency, so that the air-energy water heater is reliably in energy efficiency priority mode in the first case.

[0071] Furthermore, in some embodiments, in the first case, a matching preset fifth opening degree can be determined based on the control anchor point, and the electronic expansion valve can be controlled to this preset fifth opening degree. Furthermore, when the actual exhaust gas superheat reaches the first preset exhaust gas superheat degree, the electronic expansion valve can be fine-tuned based on the actual intake gas superheat to ensure a balanced system.

[0072] In the second case, the ambient temperature is greater than the preset ambient temperature value (Ta℃), indicating that the water heater unit is in a frost-free zone, and the lower water temperature is less than or equal to the water temperature preset value (Tw℃), indicating that the lower water temperature is low. At this time, the second preset exhaust superheat (for example, A℃) is determined; and the lower water temperature and the second preset exhaust superheat are used as control anchor points to determine the preset sixth frequency that matches the control anchor point, and the compressor is controlled to operate at the preset sixth frequency, so that the air-energy water heater is reliably in energy efficiency priority mode in the second case.

[0073] Furthermore, in some embodiments, in the second case, a matching preset sixth opening degree can be determined based on the control anchor point, and the electronic expansion valve can be controlled to this preset sixth opening degree. Furthermore, when the actual exhaust gas superheat reaches the second preset exhaust gas superheat degree, the electronic expansion valve can be fine-tuned based on the actual intake gas superheat to ensure a balanced system.

[0074] In the third case, the ambient temperature is lower than the preset ambient temperature value (Ta℃), indicating that the water heater unit is in the frosting area, and the lower water temperature is higher than the water temperature preset value (Tw℃), indicating that the lower water temperature is higher. At this time, the second preset exhaust superheat (for example, A℃) is determined; and the lower water temperature and the second preset exhaust superheat are used as control anchor points to determine the preset seventh frequency that matches the control anchor point, and the compressor is controlled to operate at the preset seventh frequency, so that the air-energy water heater is reliably in the energy efficiency priority mode in the third case.

[0075] Furthermore, in some embodiments, in the third case, a matching preset seventh opening degree can be determined based on the control anchor point, and the electronic expansion valve can be controlled to the preset seventh opening degree. Furthermore, when the actual exhaust gas superheat reaches the second preset exhaust gas superheat degree, the electronic expansion valve can be fine-tuned based on the actual intake gas superheat to ensure a balanced system.

[0076] In the fourth case, the ambient temperature is less than or equal to the preset ambient temperature value (Ta℃), indicating that the water heater unit is in the frosting area, and the lower water temperature is less than or equal to the water temperature preset value (Tw℃), indicating that the lower water temperature is low. At this time, the third preset exhaust superheat is determined (for example, A-5℃); and the lower water temperature and the third preset exhaust superheat are used as control anchor points to control the compressor to operate at the preset eighth frequency, so that the air-energy water heater is reliably in the energy efficiency priority mode in the fourth case.

[0077] Furthermore, in some embodiments, in the fourth case, a matching preset eighth opening degree can be determined based on the control anchor point, and the electronic expansion valve can be controlled to the preset eighth opening degree. Furthermore, when the actual exhaust gas superheat reaches the third preset exhaust gas superheat degree, the electronic expansion valve can be fine-tuned based on the actual intake gas superheat to ensure a balanced system.

[0078] Furthermore, in one embodiment, in the aforementioned embodiment of the present application, determining whether the upper water temperature satisfies the hysteresis temperature, that is, determining whether the upper water tank temperature is less than a predetermined temperature, where the predetermined temperature = the set temperature - the hysteresis value. In this embodiment, the hysteresis value can be a pre-specified fixed value, such as 5 degrees.

[0079] Alternatively, in another embodiment, determining whether the upper water temperature satisfies the hysteresis temperature, that is, determining whether the upper water temperature is less than a predetermined temperature, where the predetermined temperature = the set temperature - the hysteresis value. In this embodiment, the hysteresis value may be a dynamic value obtained by dynamically adjusting a pre-specified fixed value based on the ambient temperature. For example, a hysteresis adjustment coefficient matching the ambient temperature is first determined, and then the hysteresis value is obtained by multiplying the pre-specified fixed value by the hysteresis adjustment coefficient. The predetermined temperature is calculated based on the hysteresis value dynamically determined based on the ambient temperature. Based on this predetermined temperature, a more accurate determination of whether the first heating state or the second heating state can be made.

[0080] In addition, the embodiment of the present application also provides a water temperature control device, which can be applied to an air energy water heater, which includes a water tank and a compressor. Figure 3 As shown, Figure 3 A block diagram of a water temperature control device according to an embodiment of the present application is shown. Specifically, the water temperature control device 300 may include a processor 301 with one or more processing cores and a memory 302 with one or more computer-readable storage media.

[0081] The processor 301 can load the executable files corresponding to the processes of one or more computer programs into the memory 302 according to the instructions, and the processor 301 can run the computer programs stored in the memory 302, thereby realizing the various functions in the embodiments of the aforementioned water temperature control method of this application.

[0082] For example, the processor 301 may execute the following steps:

[0083] Receive the water flow switch status of the water inlet pipe of the water tank; judge the operating status of the air-energy water heater based on the water flow switch status; receive the upper water temperature and the lower water temperature of the water tank; based on the operating status, use the upper water temperature or the lower water temperature as the control anchor point to control the compressor to run at a preset frequency, so that the air-energy water heater is in energy efficiency priority mode.

[0084] In some embodiments, the processor can also be used to: when "determining the operating state of the air-energy water heater based on the water flow switch state": determine whether the water flow switch state is the first state; if the water flow switch state is the first state, determine that the operating state of the air-energy water heater is the first heating state; correspondingly, when "based on the operating state, use the upper water temperature or the lower water temperature as the control anchor point to control the compressor to run at a preset frequency, so that the air-energy water heater is in a preset mode": based on the first heating state, use the upper water temperature as the control anchor point to control the compressor to run at the preset first heating state frequency, so that the air-energy water heater is in an energy efficiency priority mode.

[0085] In some embodiments, the processor can also be used to: when "determining the operating state of the air-energy water heater based on the water flow switch state": determine whether the water flow switch state is the second state; if the water flow switch state is the second state, determine that the operating state of the air-energy water heater is the second heating state; correspondingly, based on the operating state, using the upper water temperature or the lower water temperature as the control anchor point, control the compressor to run at a preset frequency, so that the air-energy water heater is in a preset mode: based on the second heating state, using the lower water temperature as the control anchor point, control the compressor to run at the preset second heating state frequency, so that the air-energy water heater is in an energy efficiency priority mode.

[0086] Those skilled in the art will appreciate that all or part of the steps in the various methods of the above embodiments may be accomplished by a computer program, or by controlling related hardware through a computer program. The computer program may be stored in a computer-readable storage medium and loaded and executed by a processor.

[0087] To this end, an embodiment of the present application further provides a storage medium storing a computer program, which can be loaded by a processor to execute the steps of any method provided in the embodiment of the present application.

[0088] The storage medium may be a computer-readable storage medium, and the storage medium may include a read-only memory (ROM), a random access memory (RAM), a magnetic disk, or an optical disk.

[0089] Since the computer program stored in the storage medium can execute the steps of any method provided in the embodiments of the present application, the beneficial effects that can be achieved by the method provided in the embodiments of the present application can be achieved. Please refer to the previous embodiments for details and will not be repeated here.

[0090] In addition, see Figure 4 The embodiment of the present application also provides an air energy water heater, for example, an air energy water heater, the air energy water heater 400 may include Figure 3 The water temperature control device 300 and other air-energy water heater modules 500 (such as a compressor, a water tank, etc.) are shown.

[0091] According to another embodiment of the present application, a computer program product or computer program includes computer instructions stored in a computer-readable storage medium. A processor of a water temperature control device reads the computer instructions from the computer-readable storage medium and executes the computer instructions, causing the water temperature control device to perform the methods provided in various optional implementations of the embodiments of the present application.

[0092] Those skilled in the art will readily conceive of other embodiments of the present application after considering the specification and practicing the embodiments disclosed herein. This application is intended to cover any variations, uses, or adaptations of the present application that follow the general principles of this application and include common knowledge or customary techniques in the art that are not disclosed herein.

[0093] It should be understood that the present application is not limited to the embodiments that have been described above and shown in the accompanying drawings, but various modifications and changes may be made without departing from the scope thereof.

Claims

1. A water temperature control method, applicable to an air-energy water heater, wherein the air-energy water heater comprises a water tank and a compressor, characterized in that: The method comprises: receiving a water flow switch status of a water inlet pipe of the water tank; Based on the state of the water flow switch, determining the operating state of the air-energy water heater; receiving the upper water temperature and the lower water temperature of the water tank; Based on the operating state, the upper water temperature or the lower water temperature is used as a control anchor point to control the compressor to operate at a preset frequency, so that the air-energy water heater is in an energy efficiency priority mode.

2. The method according to claim 1, characterized in that The step of determining the operating state of the air-energy water heater based on the state of the water flow switch includes: Determining whether the water flow switch state is the first state; If the water flow switch state is the first state, determining that the operating state of the air energy water heater is the first heating state; Correspondingly, based on the operating state, the upper water temperature or the lower water temperature is used as a control anchor point to control the compressor to operate at a preset frequency, so that the air-energy water heater is in an energy efficiency priority mode, including: Based on the first heating state, taking the upper water temperature as the control anchor point, the compressor is controlled to run at a preset first heating state frequency, so that the air-energy water heater is in an energy efficiency priority mode.

3. The method according to claim 2, characterized in that After receiving the upper water temperature and the lower water temperature of the water tank, the method further includes: Receiving ambient temperature; Correspondingly, based on the first heating state, taking the upper water temperature as the control anchor point, controlling the compressor to operate at a preset first heating state frequency, so that the air-energy water heater is in an energy efficiency priority mode, includes: When the ambient temperature is greater than a preset ambient temperature value and the upper water temperature is greater than a preset water temperature value, determining a first preset exhaust gas superheat; and using the upper water temperature and the first preset exhaust gas superheat as control anchor points, controlling the compressor to operate at a preset first frequency, so that the air-energy water heater is in the energy efficiency priority mode; Alternatively, when the ambient temperature is greater than a preset ambient temperature value and the upper water temperature is less than or equal to a preset water temperature value, determining a second preset exhaust gas superheat; and using the upper water temperature and the second preset exhaust gas superheat as the control anchor point, controlling the compressor to operate at a preset second frequency, so that the air energy water heater is in the energy efficiency priority mode; Alternatively, when the ambient temperature is less than a preset ambient temperature value and the upper water temperature is greater than a preset water temperature value, determining a second preset exhaust gas superheat; and using the upper water temperature and the second preset exhaust gas superheat as the control anchor point, controlling the compressor to operate at a preset third frequency, so that the air-energy water heater is in the energy efficiency priority mode; Alternatively, when the ambient temperature is less than or equal to a preset ambient temperature value and the upper water temperature is less than or equal to a preset water temperature value, determining a third preset exhaust gas superheat; and using the upper water temperature and the third preset exhaust gas superheat as the control anchor point, controlling the compressor to operate at a preset fourth frequency, so that the air-energy water heater is in the energy efficiency priority mode; The first preset exhaust superheat is greater than the second preset exhaust superheat, and the second preset exhaust superheat is greater than the third preset exhaust superheat.

4. The method according to claim 1, wherein The step of determining the operating state of the air-energy water heater based on the state of the water flow switch includes: Determining whether the water flow switch state is the second state; If the upper water temperature does not meet the return temperature and the water flow switch state is the second state, then the operating state of the air-energy water heater is determined to be the second heating state; Correspondingly, based on the operating state, the upper water temperature or the lower water temperature is used as a control anchor point to control the compressor to operate at a preset frequency, so that the air-energy water heater is in an energy efficiency priority mode, including: Based on the second heating state, the lower water temperature is used as the control anchor point, and the compressor is controlled to run at a preset second heating state frequency, so that the air-energy water heater is in an energy efficiency priority mode.

5. The method according to claim 4, characterized in that After receiving the upper water temperature and the lower water temperature of the water tank, the method further includes: Receiving ambient temperature; Correspondingly, based on the second heating state, taking the lower water temperature as the control anchor point, controlling the compressor to run the preset second heating state frequency to put the air energy water heater in the energy efficiency priority mode includes: When the ambient temperature is greater than a preset ambient temperature value and the lower water temperature is greater than a preset water temperature value, determining a first preset exhaust gas superheat degree; and using the lower water temperature and the first preset exhaust gas superheat degree as the control anchor point, controlling the compressor to operate at a preset fifth frequency, so that the air-energy water heater is in the energy efficiency priority mode; Alternatively, when the ambient temperature is greater than a preset ambient temperature value and the lower water temperature is less than or equal to a preset water temperature value, determining a second preset exhaust gas superheat; and using the lower water temperature and the second preset exhaust gas superheat as the control anchor point, controlling the compressor to operate at a preset sixth frequency, so that the air-energy water heater is in the energy efficiency priority mode; Alternatively, when the ambient temperature is less than or equal to a preset ambient temperature value and the lower water temperature is greater than a preset water temperature value, determining a second preset exhaust gas superheat; and using the lower water temperature and the second preset exhaust gas superheat as the control anchor point, controlling the compressor to operate at a preset seventh frequency, so that the air-energy water heater is in the energy efficiency priority mode; Alternatively, when the ambient temperature is less than or equal to a preset ambient temperature value and the lower water temperature is less than or equal to a preset water temperature value, determining a third preset exhaust gas superheat; and using the lower water temperature and the third preset exhaust gas superheat as the control anchor point, controlling the compressor to operate at a preset eighth frequency, so that the air-energy water heater is in the energy efficiency priority mode; The first preset exhaust superheat is greater than the second preset exhaust superheat, and the second preset exhaust superheat is greater than the third preset exhaust superheat.

6. A water temperature control device, suitable for an air-energy water heater, the air-energy water heater comprising a water tank and a compressor, characterized in that: The water temperature control device includes a memory and a processor, wherein the memory stores a computer program, and the processor is configured to read the computer program stored in the memory to execute: receiving a water flow switch status of a water inlet pipe of the water tank; Based on the state of the water flow switch, determining the operating state of the air-energy water heater; receiving the upper water temperature and the lower water temperature of the water tank; Based on the operating state, the upper water temperature or the lower water temperature is used as a control anchor point to control the compressor to operate at a preset frequency, so that the air-energy water heater is in an energy efficiency priority mode.

7. The device according to claim 6, characterized in that The processor is configured to: In the case of "determining the operating state of the air-energy water heater based on the water flow switch state": determining whether the water flow switch state is the first state; if the water flow switch state is the first state, determining that the operating state of the air-energy water heater is the first heating state; Correspondingly, when "based on the operating state, taking the upper water temperature or the lower water temperature as the control anchor point, controlling the compressor to run at a preset frequency, so that the air-energy water heater is in a preset mode": based on the first heating state, taking the upper water temperature as the control anchor point, controlling the compressor to run at the preset first heating state frequency, so that the air-energy water heater is in an energy efficiency priority mode.

8. The device according to claim 6, characterized in that The processor is configured to: In the case of "determining the operating state of the air-energy water heater based on the water flow switch state": determining whether the water flow switch state is the second state; if the water flow switch state is the second state, determining that the operating state of the air-energy water heater is the second heating state; Correspondingly, based on the operating state, taking the upper water temperature or the lower water temperature as the control anchor point, the compressor is controlled to run at a preset frequency, so that the air-energy water heater is in a preset mode: based on the second heating state, taking the lower water temperature as the control anchor point, the compressor is controlled to run at a preset second heating state frequency, so that the air-energy water heater is in an energy efficiency priority mode.

9. A storage medium, characterized in that: A computer program is stored thereon, and when the computer program is executed by a processor of the water temperature control device, the computer is caused to execute the method according to any one of claims 1 to 5.

10. An air energy water heater, characterized in that: Includes the water temperature control device as claimed in claim 6.

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