Control method and control device of heat pump system and heat pump system

Abstract

The invention provides a control method and device of a heat pump system and the heat pump system. The control method comprises the steps that it is determined that the heat pump system is in a heating mode, and the external temperature of the outdoor environment where the heat pump system is located is obtained; different water temperature detection operations are executed on a hot water tank of the heat pump system according to the interval range where the external temperature is located; and according to the detection result of the water temperature detection operation, the heat pump system is controlled to be switched between an energy-saving mode and a normal mode. According to the control method and control device of the heat pump system and the heat pump system, by considering the external environment temperature and the comprehensive condition of hot water in the water tank at the same time, the energy efficiency ratio (COP) of the system is improved while it is guaranteed that the hot water is rapidly heated, and therefore the problem that in the prior art, energy consumption is increased when a heat pump operates at high frequency is solved; and the problem of slow temperature rise of hot water possibly caused by low-frequency operation is solved.

Description

Technical Field

[0001] The present invention relates to the technical field of heat pumps, and in particular to a control method, a control device and a heat pump system for a heat pump system. Background Art

[0002] In related technologies, an air source heat pump can produce hot water when the external environmental temperature is extremely low, and the heat production efficiency of the heat pump is different at different external environmental temperatures. The high-frequency operation of the heat pump increases the energy consumption of the system while improving the heat production efficiency, and reduces the ratio of the heat production of the whole machine to the energy consumption of the system, that is, the COP value; while reducing the operation frequency of the heat pump can improve the COP of the system, but may cause the hot water (Tao) to heat up slowly, or even fail to reach the preset temperature (Tset). The traditional heat pump system cannot balance the heating efficiency and the energy efficiency of the whole heat pump system, so it cannot achieve the functions of energy saving and meeting the heating requirements of users at the same time, resulting in poor user experience and more energy consumption. Summary of the Invention

[0003] The present invention provides a control method, a control device and a heat pump system for a heat pump system, which are used to solve the defects existing in the prior art and achieve the following technical effects: by simultaneously considering the external environmental temperature and the comprehensive condition of the hot water in the water tank, the energy efficiency ratio (COP) of the system is improved while ensuring the rapid heating of the hot water, thereby solving the problem of increased energy consumption when the heat pump operates at high frequency in the prior art, and the problem that the hot water may heat up slowly when operating at low frequency.

[0004] The control method for a heat pump system according to the first aspect embodiment of the present invention includes:

[0005] Determine that the heat pump system is in the heating mode, and obtain the external temperature of the outdoor environment where the heat pump system is located;

[0006] According to the range of the external temperature, perform different water temperature detection operations on the hot water tank of the heat pump system;

[0007] According to the detection result of the water temperature detection operation, control the heat pump system to switch between the energy-saving mode and the normal mode.

[0008] According to an embodiment of the present invention, the step of performing different water temperature detection operations on the hot water tank of the heat pump system according to the range of the external temperature specifically includes:

[0009] When the external temperature is less than the first set temperature and greater than or equal to the second set temperature, perform a first water temperature detection operation on the hot water tank of the heat pump system;

[0010] Wherein, the first water temperature detection operation includes:

[0011] Obtain the upper hot water temperature and the lower hot water temperature of the hot water tank, and determine the target hot water temperature preset for the hot water tank.

[0012] According to an embodiment of the present invention, the step of controlling the heat pump system to switch between the energy-saving mode and the normal mode according to the detection result of the water temperature detection operation specifically includes:

[0013] Control the heat pump system to switch between the energy-saving mode and the normal mode according to the range of the difference between the upper hot water temperature and the lower hot water temperature, and the range of the difference between one of the upper hot water temperature and the lower hot water temperature and the target hot water temperature.

[0014] According to an embodiment of the present invention, the step of controlling the heat pump system to switch between the energy-saving mode and the normal mode according to the range of the difference between the upper hot water temperature and the lower hot water temperature, and the range of the difference between one of the upper hot water temperature and the lower hot water temperature and the target hot water temperature specifically includes:

[0015] When the difference between the upper hot water temperature and the lower hot water temperature is less than the first set temperature difference, and the difference between the target hot water temperature and the upper hot water temperature is less than the second set temperature difference, control the heat pump system to switch to the energy-saving mode;

[0016] When the difference between the upper hot water temperature and the lower hot water temperature is less than the first set temperature difference, and the difference between the target hot water temperature and the upper hot water temperature is greater than the second set temperature difference, control the heat pump system to switch to the normal mode;

[0017] When the difference between the upper hot water temperature and the lower hot water temperature is greater than the first set temperature difference, and the difference between the target hot water temperature and the lower hot water temperature is less than the second set temperature difference, control the heat pump system to switch to the energy-saving mode;

[0018] When the difference between the upper hot water temperature and the lower hot water temperature is greater than the first set temperature difference, and the difference between the target hot water temperature and the lower hot water temperature is greater than the second set temperature difference, control the heat pump system to switch to the normal mode.

[0019] According to an embodiment of the present invention, the step of performing different water temperature detection operations on the hot water tank of the heat pump system according to the range of the external temperature specifically includes:

[0020] When the external temperature is greater than or equal to the first set temperature, perform a second water temperature detection operation on the hot water tank of the heat pump system;

[0021] Among them, the second water temperature detection operation includes:

[0022] Obtain the upper hot water temperature of the hot water tank and determine the target hot water temperature preset for the hot water tank.

[0023] According to an embodiment of the present invention, the step of controlling the heat pump system to switch between the energy-saving mode and the normal mode according to the detection result of the water temperature detection operation specifically includes:

[0024] Control the heat pump system to switch between the energy-saving mode and the normal mode according to the range of the difference between the target hot water temperature and the upper hot water temperature.

[0025] According to an embodiment of the present invention, the step of controlling the heat pump system to switch between the energy-saving mode and the normal mode according to the range of the difference between the target hot water temperature and the upper hot water temperature specifically includes:

[0026] When the difference between the target hot water temperature and the upper hot water temperature is less than the third set temperature difference, control the heat pump system to switch to the energy-saving mode;

[0027] When the difference between the target hot water temperature and the upper hot water temperature is greater than the third set temperature difference, control the heat pump system to switch to the normal mode.

[0028] According to an embodiment of the present invention, after the step of determining that the heat pump system is in the heating mode and obtaining the external temperature of the outdoor environment where the heat pump system is located, it further includes:

[0029] Determine that the external temperature is less than the second set temperature, and then control the heat pump system to forcibly maintain the normal mode.

[0030] According to an embodiment of the present invention, when the heat pump system switches from the normal mode to the energy-saving mode, its execution operations are as follows:

[0031] Adjust the target temperature of the hot water tank of the heat pump system to decrease;

[0032] And / or, control the operating frequency of the compressor of the heat pump system to decrease;

[0033] And / or, control the heat pump system to turn on the timing switch function to keep it on within the set time period and off outside the set time period

[0034] And / or, control the heat pump system to turn on the heat recovery function to recover the waste heat generated during the operation of the compressor and the computer board.

[0035] The control device of the heat pump system according to the embodiment of the second aspect of the present invention includes:

[0036] An acquisition module, configured to determine that the heat pump system is in a heating mode, and acquire the external temperature of the outdoor environment where the heat pump system is located;

[0037] A first control module, configured to perform different water temperature detection operations on the hot water tank of the heat pump system according to the range of the external temperature;

[0038] A second control module, configured to control the heat pump system to switch between an energy-saving mode and a normal mode according to the detection result of the water temperature detection operation.

[0039] The heat pump system according to the embodiment of the third aspect of the present invention includes a memory, a processor, and a computer program stored on the memory and executable on the processor. When the processor executes the program, it implements the control method of the heat pump system as described in the embodiment of the first aspect of the present invention.

[0040] The present invention provides a control method for a heat pump system. By simultaneously considering the external environmental temperature and the comprehensive condition of the hot water in the water tank, this control method improves the coefficient of performance (COP) of the system while ensuring the rapid heating of the hot water, thus solving the problems of increased energy consumption during high-frequency operation and slow hot water heating during low-frequency operation in the prior art. Moreover, this control method intelligently switches between an energy-saving mode and a normal mode through precise temperature detection and condition judgment, rather than simply based on a single temperature threshold. The above intelligent adjustment method can more precisely meet the demand for hot water supply while optimizing energy consumption. For example, the system can perform different water temperature detection operations according to different external temperatures, enabling the heat pump system to adapt to a wider range of environmental temperatures and maintain efficient operation under both cold and warm external conditions.

[0041] In addition, this control method allows the system to dynamically adjust the operation strategy according to real-time temperature data, which means that the system can more flexibly respond to changes in the external environment and the internal water tank state, thereby achieving higher energy efficiency and a better user experience. Description of the Drawings

[0042] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0043] Figure 1It is a schematic flowchart of the control method of the heat pump system provided by the present invention;

[0044] Figure 2 It is a schematic structural diagram of the control device of the heat pump system provided by the present invention;

[0045] Figure 3 It is a schematic structural diagram of the electronic device provided by the present invention. Detailed embodiments

[0046] To make the objectives, technical solutions and advantages of the present invention clearer, the technical solutions in the present invention will be clearly and completely described below with reference to the accompanying drawings in the present invention. Apparently, the described embodiments are some but not all of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art without making creative efforts based on the embodiments in the present invention fall within the protection scope of the present invention.

[0047] In the description of this specification, the descriptions referring to terms such as "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. mean that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the embodiments of the present invention. In this specification, the schematic representations of the above terms are not necessarily directed to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, without conflict, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples.

[0048] The control method, control device and heat pump system of the heat pump system proposed by the present invention will be described below with reference to the accompanying drawings. Among them, before elaborating on the embodiments of the present invention in detail, the entire application scenario will be described first. The control method, control device, electronic device and computer-readable storage medium of the heat pump system in the embodiments of the present invention can be applied not only to the local area of the heat pump system, but also to the cloud platform in the Internet field, or the cloud platform in other types of Internet fields, or can also be applied to third-party devices. Among them, the third-party devices may include various different types such as mobile phones, tablet computers, notebooks, in-vehicle computers and other intelligent terminals.

[0049] Only the control method applicable to the heat pump system will be described below as an example. It should be understood that the control method of the embodiments of the present invention can also be applicable to the cloud platform and third-party devices.

[0050] It should also be noted that the control method of the heat pump system proposed by the present invention is targeted, that is, this method is applicable to the heat pump system for heating in a low-temperature environment or a high-temperature environment.

[0051] As Figure 1 shown, the control method of the heat pump system according to the first aspect embodiment of the present invention includes:

[0052] Step S1, determine that the heat pump system is in the heating mode, and obtain the external temperature of the outdoor environment where the heat pump system is located;

[0053] Step S2, according to the range of the external temperature, perform different water temperature detection operations on the hot water tank of the heat pump system;

[0054] Step S3, according to the detection result of the water temperature detection operation, control the heat pump system to switch between the energy-saving mode and the normal mode.

[0055] According to the control method of the heat pump system of the embodiment of the present invention, its working process is as follows: Ambient temperature detection: First, in step S1, the heat pump system monitors the temperature of the outdoor environment through an in-built sensor. It can be understood that since the performance and efficiency of the heat pump are directly affected by the outdoor temperature, it is necessary to monitor the external temperature and adjust the working parameters and status of the heat pump system in real time according to the external temperature. For example, when the outdoor temperature is low, the heat pump requires more energy to extract heat from the low-temperature environment.

[0056] Secondly, in step S2, according to the different external temperatures of the outdoor environment, the system will execute different water temperature detection strategies, that is, perform different water temperature detection operations on the hot water tank. Among them, the above water temperature detection operations may include increasing the detection times (when the temperature is low), reducing the detection times (when the temperature is high), detecting the water temperature in different areas of the hot water tank or detecting the water temperature in the same area of the hot water tank, etc. The present invention does not make special limitations here. It can be understood that the water temperature detection is to ensure that the water temperature in the hot water tank reaches the set standard to meet the heating or hot water demand. Therefore, the water temperature detection operation can be adaptively adjusted according to specific requirements and usage scenarios.

[0057] Finally, in step S3, after the controller performs the water temperature detection operation and obtains the corresponding water temperature detection result, the system determines whether the heat pump system needs to switch the working mode according to the result of the water temperature detection. Specifically, if the water temperature is close to or reaches the set target temperature, the system may switch to the energy-saving mode to reduce energy consumption and maintain a comfortable indoor environment; if the water temperature is lower than the target temperature, the system may remain in the normal mode to ensure rapid heating of water.

[0058] Among them, in the energy-saving mode, the system will reduce the operating frequency of the compressor to reduce energy consumption. In addition, the system may also adjust the operating state of the heat exchanger to optimize the heat exchange efficiency. In the normal mode, the system operates at a higher frequency to ensure rapid heating and reach the preset temperature target.

[0059] In summary, by dynamically adjusting the operating mode according to the ambient temperature and water temperature, the heat pump system can achieve the best energy efficiency ratio under different conditions, thereby saving energy. Moreover, the system can ensure that the indoor temperature and hot water supply meet the user's needs while saving energy, providing a comfortable living environment. In the long run, the control method of the present invention can significantly reduce energy consumption, reduce the user's electricity bill expenditure. Reducing energy consumption means reducing the dependence on fossil fuels, thereby reducing greenhouse gas emissions, which is environmentally friendly.

[0060] In the related art, an air source heat pump can produce hot water when the external environmental temperature is extremely low, and the heat production efficiency of the heat pump is different under different external environmental temperatures. The high-frequency operation of the heat pump will increase the energy consumption of the system while improving the heat production efficiency, reducing the ratio of the heat output of the whole machine to the energy consumption of the system, that is, the COP value; while reducing the operating frequency of the heat pump can increase the COP of the system, but may cause the hot water (Tao) to heat up slowly or even fail to reach the preset temperature (Tset). The traditional heat pump system cannot balance the heating efficiency and the energy efficiency of the whole heat pump system, so it cannot achieve the functions of energy saving and meeting the user's heating needs at the same time, resulting in a poor user experience and more energy consumption.

[0061] Therefore, to solve the technical defects existing in the above-mentioned related art, the present invention provides a control method for a heat pump system. By simultaneously considering the external environmental temperature and the comprehensive condition of the hot water in the water tank, this control method improves the energy efficiency ratio (COP) of the system while ensuring rapid heating of the hot water, thus solving the problem of increased energy consumption when the heat pump operates at a high frequency in the prior art, as well as the problem that the hot water may heat up slowly when the heat pump operates at a low frequency.

[0062] Moreover, this control method intelligently switches between the energy-saving mode and the normal mode through precise temperature detection and condition judgment, rather than simply based on a single temperature threshold. The above intelligent adjustment method can more precisely meet the demand for hot water supply while optimizing energy consumption. For example, the system can perform different water temperature detection operations according to different external temperatures, enabling the heat pump system to adapt to a wider range of environmental temperatures and maintain efficient operation under both cold and warm external conditions.

[0063] In addition, this control method allows the system to dynamically adjust the operation strategy according to real-time temperature data, which means that the system can respond more flexibly to changes in the external environment and the internal water tank state, thereby achieving higher energy efficiency and a better user experience.

[0064] According to some embodiments of the present invention, the steps of performing different water temperature detection operations on the hot water tank of the heat pump system according to the range of the external temperature specifically include:

[0065] When the external temperature is less than the first set temperature and greater than or equal to the second set temperature, perform a first water temperature detection operation on the hot water tank of the heat pump system.

[0066] Among them, the first water temperature detection operation includes: obtaining the upper hot water temperature and the lower hot water temperature of the hot water tank, and determining the target hot water temperature preset for the hot water tank.

[0067] In the above embodiment, the first set temperature (T1) and the second set temperature (T2) are threshold values preset by the system according to the heat pump performance and environmental conditions. For example, the first set temperature can be 7°C, and the second set temperature can be -7°C. When the outdoor temperature is lower than T1, the heat pump may require more energy to extract heat and has a lower efficiency; while when the temperature is higher than T2, the efficiency of the heat pump may increase because it becomes easier to extract heat from the environment.

[0068] When the outdoor temperature is between T1 and T2, in this embodiment, the controller performs a first water temperature detection operation on the hot water tank of the heat pump system, that is, obtains the upper and lower hot water temperatures of the hot water tank respectively, and determines the target hot water temperature. Among them, the purpose of obtaining the above upper hot water temperature and lower hot water temperature is to understand the distribution of hot water in the hot water tank, and the purpose of determining the above target hot water temperature is to ensure that the heat pump system can meet the comfort standard set by the user.

[0069] Further, the steps of controlling the heat pump system to switch between the energy-saving mode and the normal mode according to the detection result of the water temperature detection operation specifically include:

[0070] Control the heat pump system to switch between the energy-saving mode and the normal mode according to the range of the difference between the upper hot water temperature and the lower hot water temperature, and the range of the difference between one of the upper hot water temperature and the lower hot water temperature and the target hot water temperature.

[0071] It can be understood that the difference (ΔT) between the upper hot water temperature and the lower hot water temperature reflects the uniformity of the hot water in the hot water tank. If ΔT is large, it means that the hot water in the hot water tank is unevenly distributed, indicating that the system requires more energy to mix the hot water to achieve uniform distribution. And the difference (ΔTg) between the upper hot water temperature or the lower hot water temperature and the target hot water temperature reflects the gap between the current water temperature and the user's comfort requirement. If ΔTg is large, it means that the system requires more energy to heat the water to reach the target temperature.

[0072] The system will determine whether to switch to the energy-saving mode based on the above two differences. Specifically, if both ΔT and ΔTg are small, it indicates that the hot water is evenly distributed and close to the target temperature, and the system can switch to the energy-saving mode to reduce energy consumption. Conversely, if the differences are large, the system needs to remain in the normal mode to quickly adjust the water temperature.

[0073] In this way, by precisely monitoring the temperature distribution in the hot water tank, the system can ensure the uniformity and comfort of the hot water, avoiding local overheating or overcooling. Moreover, the system can dynamically adjust the working mode according to the real-time temperature data, which is more flexible than the traditional fixed-mode control and can better adapt to the changes in the external environment. In addition, the above steps can reduce the energy consumption of the system without affecting the comfort by controlling the heat pump system to switch to the energy-saving mode at the appropriate time, thus significantly reducing the operating cost, reducing unnecessary energy consumption and contributing to reducing carbon emissions, being more environmentally friendly.

[0074] In some specific embodiments of the present invention, the step of controlling the heat pump system to switch between the energy-saving mode and the normal mode according to the range of the difference between the upper hot water temperature and the lower hot water temperature, and the range of the difference between one of the upper hot water temperature and the lower hot water temperature and the target hot water temperature specifically includes:

[0075] When the difference between the upper hot water temperature and the lower hot water temperature is less than the first set temperature difference, and the difference between the target hot water temperature and the upper hot water temperature is less than the second set temperature difference, control the heat pump system to switch to the energy-saving mode;

[0076] When the difference between the upper hot water temperature and the lower hot water temperature is less than the first set temperature difference, and the difference between the target hot water temperature and the upper hot water temperature is greater than the second set temperature difference, control the heat pump system to switch to the normal mode;

[0077] When the difference between the upper hot water temperature and the lower hot water temperature is greater than the first set temperature difference, and the difference between the target hot water temperature and the lower hot water temperature is less than the second set temperature difference, control the heat pump system to switch to the energy-saving mode;

[0078] When the difference between the upper hot water temperature and the lower hot water temperature is greater than the first set temperature difference, and the difference between the target hot water temperature and the lower hot water temperature is greater than the second set temperature difference, control the heat pump system to switch to the normal mode.

[0079] For example, if the first set temperature difference is 3°C and the second set temperature difference is 10°C, then the above step of controlling the heat pump system to switch between the energy-saving mode and the normal mode is specifically as follows:

[0080] When the difference between the upper hot water temperature and the lower hot water temperature is less than 3°C, and the difference between the target hot water temperature and the upper hot water temperature is less than 10°C, control the heat pump system to switch to the energy-saving mode;

[0081] When the difference between the upper hot water temperature and the lower hot water temperature is less than 3°C, and the difference between the target hot water temperature and the upper hot water temperature is greater than 10°C, control the heat pump system to switch to the normal mode;

[0082] When the difference between the upper hot water temperature and the lower hot water temperature is greater than 3°C, and the difference between the target hot water temperature and the lower hot water temperature is less than 10°C, control the heat pump system to switch to the energy-saving mode;

[0083] When the difference between the upper hot water temperature and the lower hot water temperature is greater than 3°C, and the difference between the target hot water temperature and the lower hot water temperature is greater than 10°C, control the heat pump system to switch to the normal mode.

[0084] According to some other embodiments of the present invention, the step of performing different water temperature detection operations on the hot water tank of the heat pump system according to the range of the external temperature specifically includes:

[0085] When the external temperature is greater than or equal to the first set temperature, perform the second water temperature detection operation on the hot water tank of the heat pump system.

[0086] Wherein, the second water temperature detection operation includes: obtaining the upper hot water temperature of the hot water tank and determining the target hot water temperature preset for the hot water tank.

[0087] In this embodiment, the first set temperature (T1) is a threshold preset by the system for judging whether the outdoor temperature is suitable for performing a specific water temperature detection operation. When the outdoor temperature reaches or exceeds this threshold, the system considers that the environmental temperature is high enough and the working efficiency of the heat pump is high.

[0088] In the case of a relatively high outdoor temperature, the system performs the second water temperature detection operation, that is, obtains the upper hot water temperature of the hot water tank and determines the target hot water temperature preset for the hot water tank. It can be understood that because in a high-temperature environment, the upper hot water temperature of the hot water tank is usually closer to the target temperature set by the user, so only the temperature of this part needs to be monitored. And the target hot water temperature is the hot water temperature that the user hopes to reach, and the system will adjust the working state of the heat pump according to this target.

[0089] Furthermore, the step of controlling the heat pump system to switch between the energy-saving mode and the normal mode according to the detection result of the water temperature detection operation specifically includes:

[0090] Control the heat pump system to switch between the energy-saving mode and the normal mode according to the range of the difference between the target hot water temperature and the upper hot water temperature.

[0091] In this embodiment, the system determines whether to switch the working mode based on the difference ΔTg between the target hot water temperature and the upper hot water temperature. The above difference reflects the gap between the hot water temperature and the user's comfort requirement.

[0092] Specifically, if ΔTg is within a certain specific range, the system will switch to the energy-saving mode, which means the heat pump will operate at a lower power to reduce energy consumption while still being able to meet the user's basic hot water demand; if ΔTg exceeds this specific range, the system will remain in the normal mode, which means the heat pump will operate at a higher power to quickly reach or maintain the target hot water temperature and ensure user comfort.

[0093] In this way, in a high-temperature environment, the system reduces the detection of the water temperature at the lower part of the hot water tank, which simplifies the operation process and reduces the complexity of the system. And since only the upper hot water temperature needs to be monitored, the system can respond faster to temperature changes and quickly adjust the working state of the heat pump to meet user needs. In addition, since the working efficiency of the heat pump is usually high in a high-temperature environment, the system can effectively provide hot water even in the energy-saving mode, reducing energy waste.

[0094] In a specific embodiment of the present invention, the steps of controlling the heat pump system to switch between the energy-saving mode and the normal mode according to the range of the difference between the target hot water temperature and the upper hot water temperature specifically include:

[0095] When the difference between the target hot water temperature and the upper hot water temperature is less than the third set temperature difference, control the heat pump system to switch to the energy-saving mode;

[0096] When the difference between the target hot water temperature and the upper hot water temperature is greater than the third set temperature difference, control the heat pump system to switch to the normal mode.

[0097] For example, if the third set temperature difference is 10°C, the above steps of controlling the heat pump system to switch between the energy-saving mode and the normal mode are specifically as follows:

[0098] When the difference between the target hot water temperature and the upper hot water temperature is less than 10°C, control the heat pump system to switch to the energy-saving mode;

[0099] When the difference between the target hot water temperature and the upper hot water temperature is greater than 10°C, control the heat pump system to switch to the normal mode.

[0100] According to some other embodiments of the present invention, after the step of determining that the heat pump system is in the heating mode and obtaining the external temperature of the outdoor environment where the heat pump system is located, the control method of the heat pump system further includes:

[0101] If it is determined that the outside temperature is lower than the second set temperature, then control the heat pump system to forcibly maintain the normal mode.

[0102] In this embodiment, when the outside temperature is lower than the second set temperature (T2), it means that the ambient temperature is low, and the difficulty of the heat pump extracting heat from the environment increases, and the efficiency decreases. Therefore, in this case, to ensure that the heat pump can provide sufficient heat to meet the user's needs, the system needs to be forcibly maintained in the normal mode.

[0103] In this way, in a low-temperature environment, forcibly maintaining the normal mode can ensure that the heat pump system can provide sufficient heat and prevent the indoor temperature from being too low. Although the energy consumption may increase, the above method ensures that users can enjoy a comfortable indoor environment in cold weather.

[0104] According to some embodiments of the present invention, when the heat pump system switches from the normal mode to the energy-saving mode, the system adjusts the target temperature of the hot water tank of the heat pump system to decrease.

[0105] When the system switches to the energy-saving mode, the target temperature of the hot water tank is set lower than that in the normal mode, thereby reducing the energy required for the heat pump to operate and reducing the working time of the heat pump compressor, achieving an energy-saving effect.

[0106] According to some embodiments of the present invention, when the heat pump system switches from the normal mode to the energy-saving mode, the system controls the operating frequency of the compressor of the heat pump system to decrease.

[0107] It can be understood that the compressor of the heat pump is its core component, responsible for increasing the pressure of the refrigerant, thereby realizing the transfer of heat. By reducing the operating frequency of the compressor, the system can reduce its energy consumption during operation. The above adjustment can be achieved through variable frequency technology, allowing the compressor to operate at different speeds to adapt to the current heating demand.

[0108] According to some embodiments of the present invention, when the heat pump system switches from the normal mode to the energy-saving mode, the system controls the heat pump system to turn on the timing switch function to remain on within a set time period and turn off outside the set time period.

[0109] In this way, the timing switch function allows users to set the operating time of the heat pump according to their living habits. For example, the heat pump can be automatically turned on before the user wakes up or before returning home to ensure that the indoor temperature is appropriate. Since the heat pump will automatically turn off outside the set time period, unnecessary energy waste can be avoided when the user is not at home.

[0110] According to some embodiments of the present invention, when the heat pump system switches from the normal mode to the energy-saving mode, the system controls the heat pump system to turn on the heat recovery function to recover the waste heat generated by the compressor and the computer board during operation.

[0111] In this way, the heat recovery function can utilize the waste heat generated during the operation of the heat pump. This heat is usually discharged into the environment during normal operation, but in the energy-saving mode, the system can recover this heat for heating or preheating water. Since heat recovery can reduce energy waste and reduce dependence on external energy, the overall energy efficiency of the system can be improved.

[0112] The control device of the heat pump system provided by the present invention will be described below. The control device of the heat pump system described below can be mutually corresponded and referred to the control method of the heat pump system described above.

[0113] As Figure 2 shown, the control device of the heat pump system according to the second aspect embodiment of the present invention includes:

[0114] An acquisition module 110, configured to determine that the heat pump system is in the heating mode and acquire the external temperature of the outdoor environment where the heat pump system is located;

[0115] A first control module 120, configured to perform different water temperature detection operations on the water tank of the heat pump system according to the range of the external temperature;

[0116] A second control module 130, configured to control the heat pump system to switch between the energy-saving mode and the normal mode according to the detection result of the water temperature detection operation.

[0117] The heat pump system according to the third aspect embodiment of the present invention includes a memory, a processor, and a computer program stored on the memory and executable on the processor. When the processor executes the program, it implements the control method of the heat pump system as in the first aspect embodiment of the present invention.

[0118] Figure 3 Schematically illustrates the physical structure of an electronic device. As Figure 3 shown, the electronic device may include: a processor 810, a communication interface 820, a memory 830, and a communication bus 840. Among them, the processor 810, the communication interface 820, and the memory 830 communicate with each other through the communication bus 840. The processor 810 can call the logical instructions in the memory 830 to execute the control method of the heat pump system, including: determining that the heat pump system is in the heating mode, acquiring the external temperature of the outdoor environment where the heat pump system is located; performing different water temperature detection operations on the water tank of the heat pump system according to the range of the external temperature; controlling the heat pump system to switch between the energy-saving mode and the normal mode according to the detection result of the water temperature detection operation.

[0119] In addition, when the logical instructions in the above-mentioned memory 830 are implemented in the form of software functional units and sold or used as independent products, they can be stored in a computer-readable storage medium. Based on such an understanding, the technical solution of the present invention, in essence, or the part that contributes to the prior art, or a part of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the methods in various embodiments of the present invention. The aforementioned storage medium includes: various media such as USB flash drives, external hard drives, read-only memories (ROM, Read-Only Memory), random access memories (RAM, Random Access Memory), magnetic disks, or optical discs that can store program codes.

[0120] On the other hand, the present invention also provides a computer program product. The computer program product includes a computer program that can be stored on a non-transitory computer-readable storage medium. When the computer program is executed by a processor, the computer can execute the control method of the heat pump system provided by the above-mentioned various methods, including: determining that the heat pump system is in the heating mode, and obtaining the external temperature of the outdoor environment where the heat pump system is located; according to the range of the external temperature, performing different water temperature detection operations on the hot water tank of the heat pump system; and controlling the heat pump system to switch between the energy-saving mode and the normal mode according to the detection results of the water temperature detection operation.

[0121] On another aspect, the present invention also provides a non-transitory computer-readable storage medium, on which a computer program is stored. When the computer program is executed by a processor, it is implemented to execute the control method of the heat pump system provided by the above-mentioned various methods, including: determining that the heat pump system is in the heating mode, and obtaining the external temperature of the outdoor environment where the heat pump system is located; according to the range of the external temperature, performing different water temperature detection operations on the hot water tank of the heat pump system; and controlling the heat pump system to switch between the energy-saving mode and the normal mode according to the detection results of the water temperature detection operation.

[0122] The device embodiments described above are merely illustrative. The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed to multiple network units. Some or all of the modules can be selected according to actual needs to achieve the purpose of the solution of this embodiment. Those of ordinary skill in the art can understand and implement it without creative efforts.

[0123] Through the description of the above embodiments, those skilled in the art can clearly understand that each embodiment can be implemented by means of software plus a necessary general hardware platform, and of course, it can also be implemented by hardware. Based on such an understanding, the essence of the above technical solution or the part that contributes to the prior art can be embodied in the form of a software product. This computer software product can be stored in a computer-readable storage medium, such as ROM / RAM, magnetic disk, optical disk, etc., and includes several instructions to enable a computer device (which can be a personal computer, a server, or a network device, etc.) to execute the methods of each embodiment or some parts of the embodiments.

[0124] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A control method for a heat pump system, characterized in that Including: Determine that the heat pump system is in the heating mode, and obtain the external temperature of the outdoor environment where the heat pump system is located. Perform different water temperature detection operations on the hot water tank of the heat pump system according to the range of the external temperature. Control the heat pump system to switch between the energy-saving mode and the normal mode according to the detection result of the water temperature detection operation.

2. The control method of the heat pump system according to claim 1, characterized in that, The step of performing different water temperature detection operations on the hot water tank of the heat pump system according to the range of the external temperature specifically includes: When the external temperature is less than the first set temperature and greater than or equal to the second set temperature, perform the first water temperature detection operation on the hot water tank of the heat pump system. Wherein, the first water temperature detection operation includes: Obtain the upper hot water temperature and the lower hot water temperature of the hot water tank, and determine the target hot water temperature preset for the hot water tank.

3. The control method of the heat pump system according to claim 2, characterized in that, The step of controlling the heat pump system to switch between the energy-saving mode and the normal mode according to the detection result of the water temperature detection operation specifically includes: Control the heat pump system to switch between the energy-saving mode and the normal mode according to the range of the difference between the upper hot water temperature and the lower hot water temperature, and the range of the difference between one of the upper hot water temperature and the lower hot water temperature and the target hot water temperature.

4. The control method of the heat pump system according to claim 3, characterized in that, The step of controlling the heat pump system to switch between the energy-saving mode and the normal mode according to the range of the difference between the upper hot water temperature and the lower hot water temperature, and the range of the difference between one of the upper hot water temperature and the lower hot water temperature and the target hot water temperature specifically includes: When the difference between the upper hot water temperature and the lower hot water temperature is less than the first set temperature difference, and the difference between the target hot water temperature and the upper hot water temperature is less than the second set temperature difference, control the heat pump system to switch to the energy-saving mode. When the difference between the upper hot water temperature and the lower hot water temperature is less than the first set temperature difference, and the difference between the target hot water temperature and the upper hot water temperature is greater than the second set temperature difference, control the heat pump system to switch to the normal mode. When the difference between the upper hot water temperature and the lower hot water temperature is greater than the first set temperature difference, and the difference between the target hot water temperature and the lower hot water temperature is less than the second set temperature difference, control the heat pump system to switch to the energy-saving mode. When the difference between the upper hot water temperature and the lower hot water temperature is greater than the first set temperature difference, and the difference between the target hot water temperature and the lower hot water temperature is greater than the second set temperature difference, control the heat pump system to switch to the normal mode.

5. The control method of the heat pump system according to claim 2, characterized in that The step of performing different water temperature detection operations on the hot water tank of the heat pump system according to the range of the external temperature specifically includes: When the external temperature is greater than or equal to the first set temperature, perform the second water temperature detection operation on the hot water tank of the heat pump system. Wherein, the second water temperature detection operation includes: Obtain the upper hot water temperature of the hot water tank, and determine the target hot water temperature preset for the hot water tank.

6. The control method of the heat pump system according to claim 5, characterized in that, The step of controlling the heat pump system to switch between an energy-saving mode and a normal mode according to the detection result of the water temperature detection operation specifically includes: Controlling the heat pump system to switch between an energy-saving mode and a normal mode according to the range of the difference between the target hot water temperature and the upper hot water temperature.

7. The control method of the heat pump system according to claim 6, characterized in that, The step of controlling the heat pump system to switch between an energy-saving mode and a normal mode according to the range of the difference between the target hot water temperature and the upper hot water temperature specifically includes: When the difference between the target hot water temperature and the upper hot water temperature is less than a third set temperature difference, controlling the heat pump system to switch to the energy-saving mode; When the difference between the target hot water temperature and the upper hot water temperature is greater than the third set temperature difference, controlling the heat pump system to switch to the normal mode.

8. The control method of the heat pump system according to claim 2, characterized in that, After the step of determining that the heat pump system is in the heating mode and obtaining the external temperature of the outdoor environment where the heat pump system is located, it further includes: Determining that the external temperature is less than a second set temperature, and then controlling the heat pump system to forcibly maintain the normal mode.

9. The control method of the heat pump system according to any one of claims 1 to 8, characterized in that When the heat pump system switches from the normal mode to the energy-saving mode, its execution operations are as follows: Adjusting the target temperature of the hot water tank of the heat pump system to decrease; And / or, controlling the operating frequency of the compressor of the heat pump system to decrease; And / or, controlling the heat pump system to turn on the timing switch function to remain on within a set time period and turn off outside the set time period And / or, controlling the heat pump system to turn on the heat recovery function to recover the waste heat generated during the operation of the compressor and the computer board.

10. A control device for a heat pump system, characterized in that, It includes: An acquisition module for determining that the heat pump system is in the heating mode and obtaining the external temperature of the outdoor environment where the heat pump system is located; A first control module for performing different water temperature detection operations on the hot water tank of the heat pump system according to the range of the external temperature; A second control module for controlling the heat pump system to switch between an energy-saving mode and a normal mode according to the detection result of the water temperature detection operation.

11. A heat pump system, comprising a memory, a processor, and a computer program stored on the memory and executable on the processor, characterized in that, When the processor executes the program, it implements the control method of the heat pump system according to any one of claims 1 to 9.

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