Control method and device of solar heat pump water heater and electronic equipment

Abstract

The invention provides a control method and device of a solar heat pump water heater and electronic equipment, the control method is applied to the solar heat pump water heater, and the control method comprises the steps that the first upper temperature of a water storage tank is continuously obtained; when the first upper temperature is smaller than a preset first upper threshold value, the electric heating pump is controlled to conduct heating, water circulation between the solar heat collector and the water storage tank is controlled, and water circulation between the electric heating pump and the water storage tank is controlled; when the first upper temperature is smaller than a preset second upper threshold value, the electric heating pump is controlled to be turned off; when the first upper temperature is larger than a preset third upper threshold value, water circulation between the solar heat collector and the water storage tank is controlled; when the first upper temperature is smaller than a preset fourth upper threshold value, water circulation between the solar heat collector and the water storage tank is controlled to be stopped; according to the scheme provided by the embodiment of the invention, the safety of the solar heat pump water heater in a low-temperature environment and a high-temperature environment can be improved.

Description

Technical Field

[0001] The present application relates to, but is not limited to, the technical field of heating systems, and in particular to a control method, device and electronic equipment for a solar heat pump water heater. Background Art

[0002] Solar heat pump water heater is a composite hot water supply system that integrates solar heat collection technology and heat pump technology. It uses solar energy as a clean heating energy source and can also heat through a heat pump system to meet hot water needs.

[0003] In extremely hot environments, the water in the solar heat pump water heater heats up and expands, which can easily cause the pipes to rupture. Summary of the invention

[0004] The following is a summary of the subject matter described in detail herein. This summary is not intended to limit the scope of the claims.

[0005] The embodiments of the present application provide a control method, device and electronic equipment for a solar heat pump water heater, which can improve the safety of the solar heat pump water heater in low temperature environments and high temperature environments.

[0006] To achieve the above-mentioned purpose, a first aspect of an embodiment of the present application proposes a control method for a solar heat pump water heater, which is applied to a solar heat pump water heater. The solar heat pump water heater includes a solar collector, an electric heat pump, a water storage tank and a control module. The solar collector and the electric heat pump are electrically connected to the control module respectively. A first temperature sensing module is arranged in the water storage tank. The solar collector is connected to the water storage tank, and the electric heat pump is connected to the water storage tank. The control method includes: continuously obtaining a first upper temperature of the water storage tank, wherein the first upper temperature represents the water temperature of the upper part of the water storage tank; when the first upper temperature is less than a preset first upper threshold value, controlling the electric heat pump to The method comprises the steps of: heating the solar thermal collector and controlling water circulation between the solar thermal collector and the water storage tank, and controlling water circulation between the electric heat pump and the water storage tank; when the first upper temperature is less than a preset second upper threshold value, controlling the electric heat pump to be turned off; when the first upper temperature is greater than a preset third upper threshold value, controlling water circulation between the solar thermal collector and the water storage tank; and stopping water circulation between the solar thermal collector and the water storage tank when the first upper temperature is less than a preset fourth upper threshold value; wherein the third upper threshold value is greater than or equal to the fourth upper threshold value, the second upper threshold value is greater than or equal to the first upper threshold value, and the fourth upper threshold value is greater than the second upper threshold value.

[0007] In one embodiment, the solar collector is connected to the upper part of the water storage tank through a first pipe, and the solar collector is connected to the lower part of the water storage tank through a second pipe. When the first upper temperature is greater than a preset third upper threshold, water circulation is controlled between the solar collector and the water storage tank, including: when the first upper temperature is greater than the preset third upper threshold, the hot water in the solar collector is controlled to enter the water storage tank through the first pipe, and the hot water in the water storage tank is controlled to enter the solar collector through the second pipe.

[0008] In one embodiment, the electric heat pump is connected to the upper part of the water storage tank through a third pipe, and the electric heat pump is connected to the lower part of the water storage tank through a fourth pipe. When the first upper temperature is lower than a preset first upper threshold value, the electric heat pump is controlled to heat, and water circulation between the solar collector and the water storage tank and between the electric heat pump and the water storage tank are controlled, including: when the first upper temperature is lower than the preset first upper threshold value, the electric heat pump is controlled to heat; the hot water in the electric heat pump is controlled to enter the water storage tank through the third pipe, and the hot water in the water storage tank is controlled to enter the electric heat pump through the fourth pipe; at the same time, water circulation between the solar collector and the water storage tank is controlled.

[0009] In one embodiment, the electric heat pump includes a compressor and an electric heater, and the control method also includes: obtaining the ambient temperature; when the ambient temperature is greater than a preset first ambient threshold, turning on the compressor for heating; continuously obtaining a second upper temperature of the upper part of the water storage tank, and when the first operating time of the compressor is greater than a preset first time threshold, and the second upper temperature is less than a preset fifth upper threshold, turning on the electric heater for heating; when the second upper temperature is greater than a preset sixth upper threshold, controlling the electric heater to stop heating.

[0010] In one embodiment, the control method also includes: continuously obtaining the first lower temperature of the water storage tank, wherein the first lower temperature represents the water temperature in the lower part of the water storage tank; when the first lower temperature is greater than a preset first lower threshold, controlling the electric heat pump to stop electric heating.

[0011] In one embodiment, a second temperature sensing module is provided in the solar collector, and the control method further includes: continuously acquiring the second lower temperature of the water storage tank and the first collection temperature of the solar collector, wherein the first collection temperature represents the water temperature in the solar collector; determining the collection temperature difference based on the first collection temperature and the second lower temperature, and when the first collection temperature is greater than the second lower temperature, and the collection temperature difference is greater than a preset first temperature difference threshold, controlling water circulation between the solar collector and the water storage tank; when the difference between the first collection temperature and the second lower temperature is less than a preset second temperature difference threshold, stopping the water circulation between the solar collector and the water storage tank.

[0012] In one embodiment, the control method also includes: when water circulation is performed between the solar collector and the water storage tank, continuously recording a second operating time; when the second operating time is equal to a preset second time threshold, controlling the water circulation between the solar collector and the water storage tank to stop, and continuously recording a first stop time; when the first stop time is equal to a preset third time threshold, and the first upper temperature is greater than the fourth upper threshold, re-controlling the water circulation between the solar collector and the water storage tank.

[0013] To achieve the above-mentioned purpose, the second aspect of the present application proposes a control device for a solar heat pump water heater, comprising: an acquisition module, used to continuously acquire a first upper temperature of the water storage tank, wherein the first upper temperature represents the water temperature of the upper part of the water storage tank; a control module, when the first upper temperature is less than a preset first upper threshold value, the control module is used to control the electric heat pump to heat, and control water circulation between the solar collector and the water storage tank, and water circulation between the electric heat pump and the water storage tank; when the first upper temperature is less than a preset second upper threshold value, the control module is used to control the electric heat pump to heat, and control water circulation between the solar collector and the water storage tank, and water circulation between the electric heat pump and the water storage tank; threshold, the control module is also used to control the electric heat pump to shut down; when the first upper temperature is greater than a preset third upper threshold, the control module is also used to control the water circulation between the solar collector and the water storage tank; when the first upper temperature is less than a preset fourth upper threshold, the control module is also used to control the water circulation between the solar collector and the water storage tank to stop; wherein the third upper threshold is greater than or equal to the fourth upper threshold, the second upper threshold is greater than or equal to the first upper threshold, and the fourth upper threshold is greater than the second upper threshold.

[0014] To achieve the above-mentioned purpose, the third aspect of the present application proposes an electronic device, which includes a memory and a processor, the memory stores a computer program, and the processor implements the control method of the solar heat pump water heater as described in the first aspect when executing the computer program.

[0015] To achieve the above-mentioned purpose, the fourth aspect of the present application proposes a storage medium, which stores a computer program. When the computer program is executed by a processor, the control method of the solar heat pump water heater as described in the first aspect is implemented.

[0016] According to the solution provided in the embodiment of the present application, when the ambient temperature is low and the solar heat pump water heater is not operating, the water temperature in the solar heat pump water heater is low. By detecting the first upper temperature of the upper part of the water storage tank, when the first upper temperature is less than the first upper threshold value, the water in the solar heat pump water heater begins to expand or even harden and freeze, which can easily cause damage to the solar heat pump water heater. At this time, by controlling the electric heat pump to heat, the water temperature in the electric heat pump is increased, and the water circulation between the solar collector and the water storage tank and the water circulation between the electric heat pump and the water storage tank are controlled, so that the water temperature in the solar heat pump water heater can be gradually increased, and the solar heat pump hot water can be increased. The safety of the solar heat pump water heater in a cold environment is improved. When the first upper temperature is greater than the second upper temperature, the electric heat pump is turned off and heating is stopped, thereby reducing energy consumption when no one is using the solar heat pump water heater and promoting environmental protection. When the ambient temperature is high and the water in the solar heat pump water heater is not output for use, the solar collector continues to absorb solar energy, and the water temperature in the solar collector continues to rise. By controlling the water circulation between the solar collector and the water storage tank when the first upper temperature is greater than the third upper temperature, the water temperature in the solar collector can be reduced in time, avoiding the solar collector from rupture due to excessive temperature, and improving the safety of the solar heat pump water heater in a high temperature environment.

[0017] Other features and advantages of the present application will be described in the following description, and partly become apparent from the description, or understood by practicing the present application. The purpose and other advantages of the present application can be realized and obtained by the structures specifically pointed out in the description, claims and drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The accompanying drawings are used to provide further understanding of the technical solution of the present application and constitute a part of the specification. Together with the embodiments of the present application, they are used to explain the technical solution of the present application and do not constitute a limitation on the technical solution of the present application.

[0019] Figure 1 A schematic diagram of an optional structure of a solar heat pump water heater provided in an embodiment of the present application;

[0020] Figure 2 An optional system block diagram of a solar heat pump water heater provided in an embodiment of the present application;

[0021] Figure 3A schematic diagram of an optional flow chart of a control method for a solar heat pump water heater provided in an embodiment of the present application;

[0022] Figure 4 An optional specific flow chart of a control method for a solar heat pump water heater provided in an embodiment of the present application;

[0023] Figure 5 An optional schematic flow chart of an electric heat pump heating cycle provided in an embodiment of the present application;

[0024] Figure 6 Another optional flow diagram of the electric heat pump heating cycle provided in the embodiment of the present application;

[0025] Figure 7 Another optional flow diagram of the electric heat pump heating cycle provided in the embodiment of the present application;

[0026] Figure 8 An optional flow chart of the heat collection temperature difference control water circulation provided in the embodiment of the present application;

[0027] Fig. 9 A schematic diagram of an optional flow chart for recording the running time provided in an embodiment of the present application;

[0028] Fig.10 This is an optional structural schematic diagram of a control device for a solar heat pump water heater provided in an embodiment of the present application;

[0029] Fig.11 It is a schematic diagram of an optional hardware structure of an electronic device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0030] This section will describe in detail the specific embodiments of the present application. The preferred embodiments of the present application are shown in the accompanying drawings. The purpose of the accompanying drawings is to supplement the description of the text part of the specification with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the present application, but it cannot be understood as a limitation on the scope of protection of the present application.

[0031] In the description of the present application, it should be understood that descriptions involving orientation, such as up, down, front, back, left, right, etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0032] In the description of this application, "several" means one or more, "more" means more than two, "greater than", "less than", "exceed", etc. are understood to exclude the number itself, and "above", "below", "within", etc. are understood to include the number itself. If there is a description of "first" or "second", it is only used for the purpose of distinguishing technical features, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0033] In the description of this application, unless otherwise clearly defined, terms such as setting, installation, and electrical connection should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in this application based on the specific content of the technical solution.

[0034] Currently, in extremely hot environments, the water in solar heat pump water heaters heats up and expands, which can easily cause pipes to rupture.

[0035] In view of the problem that in an extremely hot environment, the water in a solar heat pump water heater heats up and expands, which easily causes the pipeline to rupture, the present application provides a control method, device and electronic device for a solar heat pump water heater, the control method comprising: continuously obtaining a first upper temperature of a water storage tank, wherein the first upper temperature represents the water temperature of the upper part of the water storage tank; when the first upper temperature is less than a preset first upper threshold, controlling an electric heat pump to heat, and controlling water circulation between a solar collector and the water storage tank, and water circulation between the electric heat pump and the water storage tank; when the first upper temperature is less than a preset second upper threshold, controlling the electric heat pump to shut down; when the first upper temperature is greater than a preset third upper threshold, controlling water circulation between the solar collector and the water storage tank; when the first upper temperature is less than a preset fourth upper threshold, controlling water circulation between the solar collector and the water storage tank to stop; wherein the third upper threshold is greater than or equal to the fourth upper threshold, the second upper threshold is greater than or equal to the first upper threshold, and the fourth upper threshold is greater than the second upper threshold. According to the solution provided in the embodiment of the present application, when the ambient temperature is low and the solar heat pump water heater is not operating, the water temperature in the solar heat pump water heater is low. By detecting the first upper temperature of the upper part of the water storage tank, when the first upper temperature is less than the first upper threshold value, the water in the solar heat pump water heater begins to expand or even harden and freeze, which can easily cause damage to the solar heat pump water heater. At this time, by controlling the electric heat pump to heat, the water temperature in the electric heat pump is increased, and the water circulation between the solar collector and the water storage tank and between the electric heat pump and the water storage tank are controlled, the water temperature in the solar heat pump water heater can be gradually increased, thereby increasing the temperature of the solar heat pump water heater. Safety in cold environments: when the first upper temperature is greater than the second upper threshold, the electric heat pump is turned off and heating is stopped, thereby reducing energy consumption when no one is using the solar heat pump water heater and promoting environmental protection; when the ambient temperature is high and the water in the solar heat pump water heater is not output for use, the solar collector continues to absorb solar energy, and the water temperature in the solar collector continues to rise. By controlling the water circulation between the solar collector and the water storage tank when the first upper temperature is greater than the third upper temperature, the water temperature in the solar collector can be reduced in time, avoiding the solar collector from rupturing due to excessive temperature, thereby improving the safety of the solar heat pump water heater in high temperature environments.

[0036] The control method, device and electronic device of the solar heat pump water heater provided in the embodiments of the present application are specifically described through the following embodiments. First, the control method in the embodiments of the present application is described.

[0037] The embodiments of the present application are further described below in conjunction with the accompanying drawings.

[0038] First, refer to Figure 1 to Figure 2 As shown, the present application proposes a solar heat pump water heater, which includes:

[0039] The water storage tank 100 is provided with a first temperature sensing module (not shown in the figure), the first temperature sensing module includes a first thermometer and a second thermometer, the first thermometer is arranged at the top of the inner cavity of the water storage tank 100, and the second thermometer is arranged at the bottom of the inner cavity of the water storage tank 100;

[0040] The solar collector 200 is used to absorb solar energy to heat the water in the solar collector 200. A second temperature sensing module (not shown in the figure) is arranged in the solar collector 200. The solar collector 200 is connected to the upper part of the water storage tank 100 through the first pipe 510. The solar collector 200 is also connected to the lower part of the water storage tank 100 through the second pipe 520.

[0041] The electric heat pump 300 is connected to the upper part of the water storage tank 100 through the third pipe 530, and the electric heat pump 300 is also connected to the lower part of the water storage tank 100 through the fourth pipe 540. The electric heat pump 300 includes a compressor 310 and an electric heater 320;

[0042] The control module 400 , the solar thermal collector 200 and the electric heat pump 300 are electrically connected to the control module 400 , respectively.

[0043] In a specific implementation, the water storage tank 100 is further connected to a fifth pipe 550 , and the water storage tank 100 is connected to living facilities through the fifth pipe 550 .

[0044] Specifically, a first water pump 511 is provided on the first pipeline 510, and the first water pump 511 is used to drive water from the solar collector 200 to the water tank 100. A second water pump 521 is provided on the second pipeline 520, and the second water pump 521 is used to drive water from the water tank 100 to the solar collector 200. A third water pump 531 is provided on the third pipeline 530, and the third water pump 531 is used to drive water from the electric heat pump 300 to the water tank 100. A fourth water pump 541 is provided on the fourth pipeline 540, and the fourth water pump 541 is used to drive water from the water tank 100 to the electric heat pump 300. A fifth water pump is provided on the fifth pipeline 550, and the fifth water pump is used to drive water from the water tank 100 to living facilities.

[0045] It can be understood that the first water pump 511, the second water pump 521, the third water pump 531, the fourth water pump 541 and the fifth water pump are electrically connected to the control module 400, respectively, and the control module 400 is used to control the working status of the first water pump 511, the second water pump 521, the third water pump 531, the fourth water pump 541 and the fifth water pump.

[0046] In a specific embodiment, the electric heat pump 300 further includes a fan 330, a condenser 340, an evaporator 350 and a defrost heater 360. The compressor 310 is connected to the condenser 340 and the evaporator 350 respectively through a medium pipe 560. The condenser 340 is connected to the evaporator 350 through the medium pipe 560. The upper part of the condenser 340 is connected to the upper part of the water storage tank 100 through a third pipe 530. The lower part of the condenser 340 is connected to the lower part of the water storage tank 100 through a fourth pipe 540. The cold water in the water storage tank 100 enters the condenser 340 through the fourth pipe 540. The compressor 310 compresses the heat-conducting medium in the medium pipe 560, and the high-temperature heat-conducting medium enters the condenser 340 to heat the cold water into hot water. The hot water flows back to the water storage tank 100 through the third pipe 530, and the heat-conducting medium also flows from the condenser 340 to the evaporator 350.

[0047] The electric heater 320 is disposed in the condenser 340, and the electric heater 320 is used to directly heat the water in the condenser 340;

[0048] The fan 330 and the defrost heater 360 are arranged on the outside of the medium pipeline 560. The medium pipeline 560 is provided with a temperature sensor (not shown in the figure) and a four-way valve (not shown in the figure). When the control module 400 detects that the pipeline temperature of the medium pipeline 560 is less than the preset first defrost temperature threshold, the control module 400 starts to record the heating operation time of the compressor 310. When the heating operation time is equal to the preset first defrost time threshold, the control module 400 records the defrosting time and stops the fan 330 and the compressor 310. When the defrosting time is equal to the preset second defrost time threshold, the control module 400 starts to record the heating operation time of the compressor 310. Module 400 controls the reverse flow of the heat transfer medium. When the defrost duration is equal to the preset third defrost duration threshold, the control module 400 controls the compressor 310 to start. When the defrost duration is equal to the preset fourth defrost duration threshold, or the coil temperature is greater than the preset second defrost temperature threshold, the compressor 310 is controlled to stop operating, the fan 330 is controlled to start operating, and the restart operation duration is recorded. When the restart operation duration is equal to the preset fifth defrost duration threshold, the heat transfer medium is controlled to flow forward. When the restart operation duration is equal to the preset sixth defrost duration threshold, the compressor 310 is started to complete the defrost process.

[0049] In a specific embodiment, when the solar heat pump water heater is operating, the control module 400 records the continuous operation time. When the continuous operation time is equal to the preset disinfection time threshold, regardless of whether the solar heat pump water heater is operating or not, the control module 400 controls the electric heater 320 to heat the water to the preset disinfection temperature and continue the preset disinfection operation time, thereby disinfecting the electric heat pump 300 and the water in the water storage tank 100.

[0050] Reference Figure 3 As shown, an embodiment of the present application, the present application proposes a control method for a solar heat pump water heater, which is applied to a solar heat pump water heater. The solar heat pump water heater includes a solar collector, an electric heat pump, a water storage tank and a control module. The solar collector and the electric heat pump are electrically connected to the control module respectively. A first temperature sensing module is arranged in the water storage tank. The solar collector is connected to the water storage tank, and the electric heat pump is connected to the water storage tank. The control method is not limited to the following steps S310 to S3350:

[0051] Step S310, continuously acquiring a first upper temperature of the water storage tank, wherein the first upper temperature represents the water temperature of the upper part of the water storage tank;

[0052] Step S320, when the first upper temperature is less than the preset first upper threshold, controlling the electric heat pump to heat, and controlling water circulation between the solar collector and the water storage tank, and water circulation between the electric heat pump and the water storage tank;

[0053] Step S330, when the first upper temperature is less than a preset second upper threshold, controlling the electric heat pump to turn off;

[0054] Step S340, when the first upper temperature is greater than a preset third upper threshold, controlling water circulation between the solar collector and the water storage tank;

[0055] Step S350, when the first upper temperature is less than a preset fourth upper threshold, controlling the water circulation between the solar collector and the water storage tank to stop;

[0056] Among them, the third upper threshold is greater than or equal to the fourth upper threshold, the second upper threshold is greater than or equal to the first upper threshold, and the fourth upper threshold is greater than the second upper threshold.

[0057] In a specific embodiment, a temperature sensor is provided at the upper part of the inner cavity of the water storage tank, the first upper threshold value is equal to 5 degrees Celsius, the second upper threshold value is equal to 20 degrees Celsius, the third upper threshold value is equal to 90 degrees Celsius, and the fourth upper threshold value is equal to 70 degrees Celsius.

[0058] It is understandable that when the ambient temperature is low and the solar heat pump water heater is not operating, the water temperature in the solar heat pump water heater is low. By detecting the first upper temperature of the upper part of the water storage tank, when the first upper temperature is less than the first upper threshold, the water in the solar heat pump water heater begins to expand or even harden and freeze, which can easily cause damage to the solar heat pump water heater. At this time, by controlling the electric heat pump to heat, the water temperature in the electric heat pump is increased, and the water circulation between the solar collector and the water storage tank and between the electric heat pump and the water storage tank is controlled, the water temperature in the solar heat pump water heater can be gradually increased, thereby improving the solar heat pump water heater in a cold environment. In order to improve the safety of the solar heat pump water heater, when the first upper temperature is greater than the second upper temperature, the electric heat pump is turned off and the heating is stopped, thereby reducing the energy consumption when no one is using the solar heat pump water heater and promoting environmental protection; when the ambient temperature is high and the water in the solar heat pump water heater is not output for use, the solar collector continues to absorb solar energy and the water temperature in the solar collector continues to rise. By controlling the water circulation between the solar collector and the water storage tank when the first upper temperature is greater than the third upper temperature, the water temperature in the solar collector can be reduced in time, avoiding the solar collector from rupture due to excessive temperature, thereby improving the safety of the solar heat pump water heater in high temperature environment.

[0059] In addition, in one embodiment of the present application, the solar collector is connected to the upper part of the water storage tank through a first pipe, and the solar collector is connected to the lower part of the water storage tank through a second pipe. Figure 4 As shown, the control method includes:

[0060] Step S410, when the first upper temperature is greater than the preset third upper threshold, the hot water in the solar collector is controlled to enter the water storage tank through the first pipe, and the hot water in the water storage tank is controlled to enter the solar collector through the second pipe.

[0061] Specifically, the first pipe is communicated with the upper part of the solar thermal collector, and the second pipe is communicated with the lower part of the solar thermal collector.

[0062] It is understandable that when the ambient temperature is high and the water in the solar heat pump water heater is not output for use, the solar collector continues to absorb solar energy, and the water temperature in the solar collector continues to rise. By controlling the water circulation between the solar collector and the water storage tank when the first upper temperature is greater than the third upper temperature, the water temperature in the solar collector can be reduced in time, and the solar collector can be prevented from rupturing due to excessive temperature, thereby improving the safety of the solar heat pump water heater in a high temperature environment; and, by connecting the first pipe between the solar collector and the upper part of the water storage tank, and connecting the second pipe between the solar collector and the lower part of the water storage tank, due to the temperature stratification principle, the water temperature in the lower part of the water storage tank is cold, the hot water in the solar collector enters the water storage tank from the first pipe, and the cold water in the lower part of the water storage tank enters the solar collector from the second pipe, thereby improving the heat exchange efficiency between the solar collector and the water storage tank, promoting the water temperature in the solar collector to drop and promoting the water temperature in the water storage tank to rise, thereby ensuring the safety of the solar collector.

[0063] In a specific embodiment, a first water pump is provided on the first pipeline, and the first water pump is used to drive water to flow from the solar collector to the water storage tank. A second water pump is provided on the second pipeline, and the second water pump is used to drive water to flow from the water storage tank to the solar collector. The control module obtains the ambient temperature, and the control module inputs the ambient temperature and the first upper temperature into a preset first linear model to obtain a circulation frequency and a first circulation flow rate of water circulation between the solar collector and the water storage tank, wherein the first circulation flow rate is used to control the power of the first water pump and the second water pump to control the flow rate of water in the first pipeline and the second pipeline, and the circulation frequency is used to control the number of times the solar collector and the water storage tank circulate water per unit time;

[0064] Specifically, a single water cycle refers to a process in which the flow rate of the first water pump or the second water pump is equal to the capacity of the solar collector, that is, the hot water in the solar collector completely enters the water storage tank through the first pipe, and at the same time the water in the water storage tank enters the solar collector through the second pipe to refill the solar collector.

[0065] In addition, in one embodiment of the present application, the electric heat pump is connected to the upper part of the water storage tank through the third pipe, and the electric heat pump is connected to the lower part of the water storage tank through the fourth pipe. Figure 5 As shown, Figure 3 Step S320 in the embodiment includes but is not limited to the following steps S510 to S530:

[0066] Step S510, when the first upper temperature is less than a preset first upper threshold, controlling the electric heat pump to perform heating;

[0067] Step S520, controlling the hot water in the electric heat pump to enter the water storage tank through the third pipe, and controlling the hot water in the water storage tank to enter the electric heat pump through the fourth pipe;

[0068] Step S530: At the same time, control the water circulation between the solar collector and the water storage tank.

[0069] It is understandable that when the ambient temperature is low and the solar heat pump water heater is not operating, the water temperature in the solar heat pump water heater is low. By detecting the first upper temperature of the upper part of the water storage tank, when the first upper temperature is less than the first upper threshold, the water in the solar heat pump water heater begins to expand or even harden and freeze, which can easily cause damage to the solar heat pump water heater. At this time, by controlling the electric heat pump to heat, the water temperature in the electric heat pump is increased, and the water circulation between the solar collector and the water storage tank and between the electric heat pump and the water storage tank is controlled, the water temperature in the solar heat pump water heater can be gradually increased, thereby improving the safety of the solar heat pump water heater in a cold environment; Furthermore, by connecting the third pipe between the electric heat pump and the upper part of the water tank, and connecting the fourth pipe between the electric heat pump and the lower part of the water tank, due to the temperature stratification principle, the water temperature in the lower part of the water tank is relatively cold, the hot water in the electric heat pump enters the water tank from the third pipe, and the cold water in the upper part of the water tank enters the electric heat pump from the fourth pipe, thereby improving the heat exchange efficiency between the electric heat pump and the water tank, promoting the increase of the water temperature in the water tank, and the hot water in the water tank enters the solar collector through the first pipe, thereby simultaneously improving the water temperature in the water tank and the solar collector, avoiding the rupture of the water tank and the solar water heater due to too low water temperature, and improving the safety of the water tank and the solar water heater.

[0070] In a specific embodiment, a third water pump is provided on the third pipeline, and the third water pump is used to drive water from the electric heat pump to the water storage tank. A fourth water pump is provided on the fourth pipeline, and the fourth water pump is used to drive water from the water storage tank to the electric heat pump. The control module obtains the ambient temperature, and the control module inputs the ambient temperature and the third upper temperature into a preset second linear model to obtain a second circulation flow rate and heating power.

[0071] Specifically, the second circulation flow rate is used to control the power of the third water pump and the fourth water pump, thereby controlling the flow rate of water in the third pipe and the fourth pipe, and the heating power is used to control the power of the electric heat pump.

[0072] In addition, in one embodiment of the present application, the electric heat pump includes a compressor and an electric heater. Figure 6 As shown, the control method also includes but is not limited to the following steps S610 to S630:

[0073] Step S610, obtaining the ambient temperature;

[0074] Step S620, when the ambient temperature is greater than a preset first ambient threshold, start the compressor for heating;

[0075] Step S630, continuously obtaining a second upper temperature of the upper part of the water storage tank, and when the first operation time of the compressor is greater than a preset first time threshold, and the second upper temperature is less than a preset fifth upper threshold, turning on the electric heater for heating;

[0076] Step S640: when the second upper temperature is greater than a preset sixth upper threshold, the electric heater is controlled to stop heating.

[0077] Specifically, the first environmental threshold is 5 degrees Celsius, Figure 6 The embodiment shown is a Figure 3 In step S320, after detecting that the first upper temperature is less than the preset first upper threshold, the detailed method steps of controlling the electric heat pump to perform heating may also be the detailed method steps of controlling the electric heat pump to perform heating after the control module receives an operation instruction from the user to control the electric heat pump.

[0078] Exemplarily, the user inputs a control instruction to control the start of the electric heat pump, and the control module obtains the ambient temperature. When the ambient temperature is less than or equal to the first ambient threshold, the electric heater is started instead of the compressor, thereby preventing the compressor from generating a difficult-to-handle frost layer in a low-temperature environment; when the ambient temperature is greater than the first ambient threshold, the compressor is turned on for heating, and the third water pump and the fourth water pump are turned on at the same time to promote water circulation between the water storage tank and the electric heat pump. When the first operating time of the compressor is greater than the first time threshold, the second upper temperature of the water storage tank is obtained. When the second upper temperature is less than the fifth upper temperature, it indicates that the heating efficiency of the compressor is low. At this time, the electric heater is turned on for heating. When the second upper temperature is greater than the sixth upper threshold, it indicates that the heating task of the electric heat pump is completed and the electric heater can be turned off.

[0079] In a specific implementation, when the first operation time of the compressor is greater than a preset first time threshold, and the second upper temperature is less than a preset fifth upper threshold, the control module controls the electric heat pump to perform defrosting.

[0080] In addition, refer to Figure 7 As shown, in one embodiment of the present application, the control method further includes but is not limited to the following steps S710 to S720:

[0081] Step S710, continuously acquiring a first lower temperature of the water storage tank, wherein the first lower temperature represents the water temperature at the lower part of the water storage tank;

[0082] Step S720: When the first lower temperature is greater than a preset first lower threshold, the electric heat pump is controlled to stop electric heating.

[0083] Specifically, a temperature sensor is provided at the lower part of the inner cavity of the water storage tank. Figure 7 In the illustrated embodiment, the user may adjust the first lower threshold value according to actual needs.

[0084] In a specific implementation, the control module determines the second lower threshold value according to the first lower threshold value input by the user and the preset heating hysteresis difference. Figure 7 The illustrated embodiment may also include: when the first lower temperature is greater than the second lower threshold, controlling the electric heat pump to stop electric heating.

[0085] Specifically, the second lower threshold is equal to the difference between the first lower threshold and the heating hysteresis difference.

[0086] In a specific embodiment, after the electric heat pump is controlled to stop heating, the third water pump and the fourth water pump are controlled to continue running for a preset continuous operation time, which can be 30 seconds, thereby improving the heat exchange efficiency between the electric heat pump and the water storage tank and reducing the waste of heating power of the electric heat pump.

[0087] In a specific implementation, the fifth upper threshold and the sixth upper threshold are both linearly related to the first lower threshold.

[0088] In addition, in one embodiment of the present application, a second temperature sensing module is provided in the solar thermal collector, referring to Figure 8 As shown, the control method also includes but is not limited to the following steps S810 to S830:

[0089] Step S810, continuously acquiring the second lower temperature of the water storage tank and the first heat collection temperature of the solar thermal collector, wherein the first heat collection temperature represents the water temperature in the solar thermal collector;

[0090] Step S820, determining a heat collection temperature difference based on the first heat collection temperature and the second lower temperature, and when the first heat collection temperature is greater than the second lower temperature, and the heat collection temperature difference is greater than a preset first temperature difference threshold, controlling water circulation between the solar collector and the water storage tank;

[0091] Step S830, when the difference between the first heat collection temperature and the second lower temperature is less than a preset second temperature difference threshold, stop the water circulation between the solar collector and the water storage tank.

[0092] It can be understood that the collection temperature difference is determined by the first collection temperature of the solar collector and the second lower temperature of the water storage tank. When the collection temperature difference is greater than the first temperature difference threshold, it means that a large amount of solar heat is accumulated in the solar collector, while the water temperature in the water storage tank is low. By controlling the water circulation between the water storage tank and the solar collector, the hot water in the solar collector is input into the water storage tank for user use, and the cold water in the water storage tank is input into the solar collector for heating, thereby reducing the waste of solar energy and improving the efficiency of the solar collector in collecting and heating. At the same time, it can also avoid damage to the solar collector caused by excessive water temperature in the solar collector, thereby improving the safety of the solar heat pump water heater.

[0093] In addition, refer to Fig. 9 As shown, in one embodiment of the present application, the control method further includes but is not limited to the following steps S910 to S930:

[0094] Step S910, when water is circulated between the solar collector and the water storage tank, the second operation time is continuously recorded;

[0095] Step S920, when the second operation duration is equal to the preset second duration threshold, control the water circulation between the solar collector and the water storage tank to stop, and continuously record the first stop duration;

[0096] Step S930, when the first stop time is equal to the preset third time threshold and the first upper temperature is greater than the fourth upper threshold, re-control the water circulation between the solar collector and the water storage tank.

[0097] Specifically, the second time threshold is greater than the quotient of the capacity of the solar thermal collector and the first circulation flow rate, and the third time threshold is linearly related to the ambient temperature.

[0098] It can be understood that when water is circulated between the solar collector and the water storage tank, the second operating time is recorded. When the second operating time is greater than the second time threshold, the water in the solar collector that has been collected and heated has been circulated into the water storage tank, and the water in the water storage tank is also refilled into the solar collector. At this time, the first collection temperature in the solar collector is basically equal to the second lower temperature of the water storage tank. The water circulation between the solar collector and the water storage tank is stopped to improve the heat collection efficiency of the solar collector. The first stop time is recorded. When the first stop time is equal to the third time threshold, the water in the solar collector has been fully heated, and the water circulation between the solar collector and the water storage tank is re-controlled to transport the hot water in the solar collector to the water storage tank again, thereby avoiding excessive water temperature in the solar collector and improving the heating efficiency of the solar heat pump water heater.

[0099] In addition, refer to Fig.10As shown, the present application also proposes a control device 1000 for a solar heat pump water heater, comprising:

[0100] An acquisition module 1010 is used to continuously acquire a first upper temperature of the water storage tank, wherein the first upper temperature represents a water temperature at an upper portion of the water storage tank;

[0101] Processing module 1020, when the first upper temperature is less than a preset first upper threshold, processing module 1020 is used to control the electric heat pump to perform heating, and control water circulation between the solar collector and the water storage tank, and water circulation between the electric heat pump and the water storage tank;

[0102] When the first upper temperature is less than a preset second upper threshold, the processing module 1020 is also used to control the electric heat pump to shut down;

[0103] When the first upper temperature is greater than a preset third upper threshold, the processing module 1020 is also used to control water circulation between the solar collector and the water storage tank;

[0104] When the first upper temperature is less than a preset fourth upper threshold, the processing module 1020 is also used to control the water circulation between the solar collector and the water storage tank to stop;

[0105] Among them, the third upper threshold is greater than or equal to the fourth upper threshold, the second upper threshold is greater than or equal to the first upper threshold, and the fourth upper threshold is greater than the second upper threshold.

[0106] It can be understood that the specific implementation of the control device 1000 of the solar heat pump water heater is basically the same as the specific embodiment of the control method of the solar heat pump water heater mentioned above, and will not be repeated here.

[0107] In addition, refer to Fig.11 , Fig.11 : is an optional hardware structure diagram of an electronic device provided in an embodiment of the present application, the electronic device includes:

[0108] The processor 1101 may be implemented by a general-purpose CPU (Central Processing Unit), a microprocessor, an application-specific integrated circuit (ASIC), or one or more integrated circuits, and is used to execute relevant programs to implement the technical solutions provided in the embodiments of the present application;

[0109] The memory 1102 can be implemented in the form of a read-only memory (ROM), a static storage device, a dynamic storage device, or a random access memory (RAM). The memory 1102 can store an operating system and other application programs. When the technical solution provided in the embodiment of this specification is implemented by software or firmware, the relevant program code is stored in the memory 1102, and the processor 1101 calls and executes the control method of the solar heat pump water heater in the embodiment of the present application, for example, executing the above-described Figure 3 Steps S310 to S350 of the method, Figure 4 Steps S310 to S350 of the method, Figure 5 Steps S510 to S530 of the method, Figure 6 Steps S610 to S640 of the method, Figure 7 Steps S710 to S720 of the method, Figure 8 Steps S810 to S830 of the method, and Fig. 9 Steps S910 to S930 of the method;

[0110] Input / output interface 1103, used to implement information input and output;

[0111] The communication interface 1104 is used to realize the communication interaction between the device and other devices. The communication can be realized through a wired manner (such as USB, network cable, etc.) or a wireless manner (such as mobile network, WIFI, Bluetooth, etc.);

[0112] A bus 1105 that transmits information between various components of the device (e.g., the processor 1101, the memory 1102, the input / output interface 1103, and the communication interface 1104);

[0113] The processor 1101 , the memory 1102 , the input / output interface 1103 and the communication interface 1104 are connected to each other in communication within the device via the bus 1105 .

[0114] The present application also provides a storage medium, which is a computer-readable storage medium for computer-readable storage. The storage medium stores one or more programs, and the one or more programs can be executed by one or more processors to implement the control method of the solar heat pump water heater. For example, the above-described Figure 3 Steps S310 to S350 of the method, Figure 4 Steps S310 to S350 of the method, Figure 5 Steps S510 to S530 of the method, Figure 6 Steps S610 to S640 of the method, Figure 7 Steps S710 to S720 of the method, Figure 8 Steps S810 to S830 of the method, and Fig. 9 Method steps S910 to S930.

[0115] The memory, as a non-transient computer-readable storage medium, can be used to store non-transient software programs and non-transient computer executable programs. In addition, the memory may include a high-speed random access memory, and may also include a non-transient memory, such as at least one disk storage device, a flash memory device, or other non-transient solid-state storage device. In some embodiments, the memory may optionally include a memory remotely disposed relative to the processor, and these remote memories may be connected to the processor via a network. Examples of the above-mentioned network include, but are not limited to, the Internet, an intranet, a local area network, a mobile communication network, and combinations thereof.

[0116] The embodiments described in the embodiments of the present application are intended to more clearly illustrate the technical solutions of the embodiments of the present application and do not constitute a limitation on the technical solutions provided in the embodiments of the present application. Those skilled in the art will appreciate that with the evolution of technology and the emergence of new application scenarios, the technical solutions provided in the embodiments of the present application are also applicable to similar technical problems.

[0117] It can be understood by those skilled in the art that Figures 3 to 9 The technical solutions shown in the figure do not constitute a limitation on the embodiments of the present application, and may include more or fewer steps than those shown in the figure, or a combination of certain steps, or different steps.

[0118] The device embodiments described above are merely illustrative, and the units described as separate components may or may not be physically separated, that is, they may be located in one place or distributed on multiple network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0119] Those skilled in the art will appreciate that all or some of the steps in the methods disclosed above, and the functional modules / units in the systems and devices may be implemented as software, firmware, hardware, or a suitable combination thereof.

[0120] The terms "first", "second", "third", "fourth", etc. (if any) in the specification of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchangeable where appropriate, so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device comprising a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0121] It should be understood that in the present application, "at least one (item)" means one or more, and "plurality" means two or more. "And / or" is used to describe the association relationship of associated objects, indicating that three relationships may exist. For example, "A and / or B" can mean: only A exists, only B exists, and A and B exist at the same time, where A and B can be singular or plural. The character " / " generally indicates that the objects associated before and after are in an "or" relationship. "At least one of the following" or similar expressions refers to any combination of these items, including any combination of single or plural items. For example, at least one of a, b or c can mean: a, b, c, "a and b", "a and c", "b and c", or "a and b and c", where a, b, c can be single or multiple.

[0122] In the several embodiments provided in the present application, it should be understood that the disclosed devices and methods can be implemented in other ways. For example, the device embodiments described above are only schematic. For example, the division of the above units is only a logical function division. There may be other division methods in actual implementation, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of devices or units, which can be electrical, mechanical or other forms.

[0123] The units described above 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 on multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0124] In addition, each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit. The above-mentioned integrated unit may be implemented in the form of hardware or in the form of software functional units.

[0125] If the integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present application, or the part that contributes to the prior art, or all or part of the technical solution can be embodied in the form of a software product, and the computer software product is stored in a storage medium, including multiple instructions to enable a computer device (which can be a personal computer, server, or network device, etc.) to execute all or part of the steps of the methods of various embodiments of the present application. The aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (Read-Only Memory, referred to as ROM), random access memory (Random Access Memory, referred to as RAM), disk or optical disk and other media that can store programs.

[0126] The preferred embodiments of the present invention are described above with reference to the accompanying drawings, but the scope of the rights of the present invention is not limited thereto. Any modification, equivalent substitution and improvement made by a person skilled in the art without departing from the scope and essence of the present invention should be within the scope of the rights of the present invention.

Claims

1. A control method for a solar heat pump water heater, characterized in that: Applied to a solar heat pump water heater, the solar heat pump water heater comprises a solar collector, an electric heat pump, a water storage tank and a control module, the solar collector and the electric heat pump are electrically connected to the control module respectively, a first temperature sensing module is arranged in the water storage tank, the solar collector is connected to the water storage tank, the electric heat pump is connected to the water storage tank, and the control method comprises: Continuously acquiring a first upper temperature of the water storage tank, wherein the first upper temperature represents a water temperature at an upper portion of the water storage tank; When the first upper temperature is less than a preset first upper threshold, the electric heat pump is controlled to perform heating, and water circulation is controlled between the solar collector and the water storage tank, and water circulation is controlled between the electric heat pump and the water storage tank; When the first upper temperature is less than a preset second upper threshold, controlling the electric heat pump to turn off; When the first upper temperature is greater than a preset third upper threshold, controlling water circulation between the solar thermal collector and the water storage tank; When the first upper temperature is lower than a preset fourth upper threshold, controlling the water circulation between the solar thermal collector and the water storage tank to stop; The third upper threshold is greater than or equal to the fourth upper threshold, the second upper threshold is greater than or equal to the first upper threshold, and the fourth upper threshold is greater than the second upper threshold.

2. The control method according to claim 1, characterized in that: The solar thermal collector is connected to the upper part of the water storage tank through a first pipe, and the solar thermal collector is connected to the lower part of the water storage tank through a second pipe. When the temperature of the first upper part is greater than a preset third upper part threshold, water circulation is controlled between the solar thermal collector and the water storage tank, including: When the first upper temperature is greater than a preset third upper threshold, the hot water in the solar collector is controlled to enter the water storage tank through the first pipe, and the hot water in the water storage tank is controlled to enter the solar collector through the second pipe.

3. The control method according to claim 2, characterized in that: The electric heat pump is connected to the upper part of the water storage tank through a third pipe, and is connected to the lower part of the water storage tank through a fourth pipe. When the temperature of the first upper part is less than a preset first upper threshold, the electric heat pump is controlled to heat, and water circulation is controlled between the solar collector and the water storage tank, and water circulation is controlled between the electric heat pump and the water storage tank, including: When the first upper temperature is less than a preset first upper threshold, controlling the electric heat pump to perform heating; Controlling the hot water in the electric heat pump to enter the water storage tank through the third pipe, and controlling the hot water in the water storage tank to enter the electric heat pump through the fourth pipe; At the same time, water circulation between the solar collector and the water storage tank is controlled.

4. The control method according to claim 1, characterized in that: The electric heat pump includes a compressor and an electric heater, and the control method further includes: Get the ambient temperature; When the ambient temperature is greater than a preset first ambient threshold, turning on the compressor for heating; Continuously acquiring a second upper temperature of the upper part of the water storage tank, and when the first operating time of the compressor is greater than a preset first time threshold, and the second upper temperature is less than a preset fifth upper threshold, turning on the electric heater for heating; When the second upper temperature is greater than a preset sixth upper threshold, the electric heater is controlled to stop heating.

5. The control method according to claim 1, characterized in that: The control method further comprises: Continuously acquiring a first lower temperature of the water storage tank, wherein the first lower temperature represents a water temperature at a lower portion of the water storage tank; When the first lower temperature is greater than a preset first lower threshold, the electric heat pump is controlled to stop electric heating.

6. The control method according to claim 1, characterized in that: A second temperature sensing module is provided in the solar thermal collector, and the control method further comprises: Continuously acquiring a second lower temperature of the water storage tank and a first heat collection temperature of the solar thermal collector, wherein the first heat collection temperature represents a water temperature in the solar thermal collector; Determine a heat collection temperature difference based on the first heat collection temperature and the second lower temperature, and when the first heat collection temperature is greater than the second lower temperature and the heat collection temperature difference is greater than a preset first temperature difference threshold, control water circulation between the solar collector and the water storage tank; When the difference between the first heat collection temperature and the second lower temperature is less than a preset second temperature difference threshold, the water circulation between the solar thermal collector and the water storage tank is stopped.

7. The control method according to claim 1, characterized in that: The control method further comprises: When water is circulated between the solar collector and the water storage tank, continuously recording the second operation time; When the second operation duration is equal to a preset second duration threshold, controlling the water circulation between the solar collector and the water storage tank to stop, and continuously recording the first stop duration; When the first stop time is equal to a preset third time threshold, and the first upper temperature is greater than the fourth upper threshold, water circulation between the solar collector and the water storage tank is re-controlled.

8. A control device for a solar heat pump water heater, characterized in that: include: An acquisition module, used for continuously acquiring a first upper temperature of the water storage tank, wherein the first upper temperature represents a water temperature of an upper portion of the water storage tank; A control module, when the first upper temperature is less than a preset first upper threshold, the control module is used to control the electric heat pump to perform heating, and to control water circulation between the solar collector and the water storage tank, and between the electric heat pump and the water storage tank; When the first upper temperature is less than a preset second upper threshold, the control module is also used to control the electric heat pump to shut down; When the first upper temperature is greater than a preset third upper threshold, the control module is also used to control water circulation between the solar collector and the water storage tank; When the first upper temperature is less than a preset fourth upper threshold, the control module is also used to control the water circulation between the solar collector and the water storage tank to stop; The third upper threshold is greater than or equal to the fourth upper threshold, the second upper threshold is greater than or equal to the first upper threshold, and the fourth upper threshold is greater than the second upper threshold.

9. An electronic device, characterized in that: The electronic device comprises a memory and a processor, the memory stores a computer program, and the processor implements the control method of the solar heat pump water heater according to any one of claims 1 to 7 when executing the computer program.

10. A storage medium storing a computer program, characterized in that: When the computer program is executed by a processor, the control method of the solar heat pump water heater according to any one of claims 1 to 7 is implemented.

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