Anti-freezing control method, device and equipment of heat pump hot water system and storage medium

Abstract

The present application relates to the technical field of heat pump system, and discloses a freeze-proof control method, device and equipment of heat pump hot water system and a storage medium.The method sets up the monitoring of indoor environment parameters, outdoor environment parameters and equipment state, compares the monitored data with the standard of freeze-proof control, selects whether to execute freeze-proof control based on the comparison result, and controls the system operation by using the corresponding freeze-proof measures, thereby solving the problem that the system is frequently started in the freeze-proof control scheme of the prior art, resulting in excessive energy consumption and short service life of the system.

Description

Technical Field

[0001] This invention relates to the field of heat pump system technology, and in particular to a method, apparatus, equipment and storage medium for antifreeze control of a heat pump hot water system. Background Technology

[0002] Heat pump systems have become the main heating facilities. Traditional heat pump units operate when heating is needed, but when not heating, the heat pump system enters a dormant state for a period of time. This can cause the pipes in the heat pump system to freeze. When restarting, they need to be thawed, which consumes a lot of time.

[0003] Currently, the primary method for controlling the freeze of heat pump systems in winter is to use a freeze sensor to detect changes in the water flow temperature. When the sensor reading falls below a set value, the heat pump unit automatically activates its heating and freeze protection mode. However, this approach does not consider indoor or outdoor temperatures, nor does it differentiate between indoor and outdoor environments. Since the heat pump unit needs to be located outdoors to extract energy from the air, the buffer tank, for better insulation, is typically placed indoors. The buffer tank and the heat pump unit are connected by water pipes, which are often buried or laid on the exterior of the building. In cold weather, when the temperature drops below the freezing point of the liquid in the pipes, ice can form, causing irreversible damage such as pipe cracking. Summary of the Invention

[0004] The main objective of this invention is to solve the problem of excessive energy consumption and short service life caused by frequent system startups in existing antifreeze control schemes.

[0005] The first aspect of this invention provides an antifreeze control method for a heat pump water heating system, applied to the heat pump water heating system, wherein the heat pump water heating system includes a heat pump unit, a buffer tank, and at least two heating devices connected by pipes, each heating device being installed on a corresponding heating area, and temperature sensing units being installed on the pipes, the heat pump unit, the buffer tank, and each heating area; the antifreeze control method includes:

[0006] The environmental parameters and equipment parameters detected by each of the temperature sensing units are obtained, wherein the environmental parameters include indoor environmental parameters and outdoor environmental parameters, and the equipment parameters include the operating status of the heat pump unit and the fault status of the temperature sensing unit.

[0007] Determine whether the indoor environmental parameters, the outdoor environmental parameters, the working status, and the fault status meet the preset judgment conditions for each antifreeze mode;

[0008] If the conditions are met, the result of the judgment determines the corresponding antifreeze mode, and the corresponding antifreeze measures are determined based on the antifreeze mode.

[0009] The corresponding modules in the heat pump water heating system are controlled to operate according to the aforementioned antifreeze measures.

[0010] Optionally, in a first implementation of the first aspect of the present invention, the anti-freeze mode includes an outdoor anti-freeze mode and an indoor anti-freeze mode; the step of determining whether the indoor environmental parameters, the outdoor environmental parameters, the working state, and the fault state meet the preset judgment conditions for each anti-freeze mode includes:

[0011] Determine whether the indoor environmental parameters, the outdoor environmental parameters, the working status, and the fault status meet the judgment conditions corresponding to the indoor antifreeze mode;

[0012] Determine whether the outdoor environmental parameters and the indoor environmental parameters meet the judgment conditions corresponding to the outdoor antifreeze mode;

[0013] If the judgment result is that only the judgment condition corresponding to the indoor antifreeze mode is met, then it is determined that there is an indoor heating abnormality in the heat pump water heating system.

[0014] If the judgment result is that only the judgment condition corresponding to the outdoor antifreeze mode is met, then it is determined that there is an outdoor heating abnormality in the heat pump water heating system.

[0015] If the judgment result is that the judgment conditions corresponding to the indoor antifreeze mode and the outdoor antifreeze mode are met, then it is determined that the indoor and outdoor heating of the heat pump water heating system are both abnormal.

[0016] Optionally, in a second implementation of the first aspect of the present invention, determining whether the indoor environmental parameters, the outdoor environmental parameters, the operating state, and the fault state satisfy the determination conditions corresponding to the indoor antifreeze mode includes:

[0017] Extract the indoor water temperature from the indoor environmental parameters and the outdoor temperature from the outdoor environmental parameters;

[0018] Determine whether the working state is a stopped state and the duration reaches a preset threshold.

[0019] If so, determine whether the outdoor temperature is less than the outdoor temperature threshold.

[0020] If it is less than, then determine whether the indoor water temperature is less than the indoor temperature threshold and whether the temperature sensing unit is faulty;

[0021] If the indoor water temperature is lower than the indoor temperature threshold or the temperature sensing unit malfunctions, then the heat pump water heating system is determined to meet the judgment conditions corresponding to the indoor antifreeze mode.

[0022] Optionally, in a third implementation of the first aspect of the present invention, the judgment condition corresponding to the outdoor anti-freeze mode includes a first outdoor judgment condition and a second outdoor judgment condition; the judgment of whether the outdoor environmental parameters and the indoor environmental parameters satisfy the judgment condition corresponding to the outdoor anti-freeze mode includes:

[0023] Extract the outdoor water temperature and the outdoor temperature from the outdoor environmental parameters;

[0024] The outdoor water temperature and the outdoor temperature are compared with the first outdoor judgment condition and the second outdoor judgment condition, respectively.

[0025] Optionally, in a fourth implementation of the first aspect of the present invention, the outdoor anti-freezing mode includes a primary outdoor anti-freezing mode and a secondary outdoor anti-freezing mode; the determination of the corresponding anti-freezing mode based on the judgment result includes:

[0026] If the determination result is that the outdoor water temperature is within the first outdoor determination condition and the outdoor temperature is less than the second outdoor determination condition, then the heat pump water heating system is determined to be in the first-level outdoor antifreeze mode.

[0027] If the determination result is that the outdoor water temperature is less than the minimum value in the first outdoor determination condition and the outdoor temperature is less than the second outdoor determination condition, then the heat pump water heating system is determined to be in the second-level outdoor antifreeze mode.

[0028] Optionally, in a fifth implementation of the first aspect of the present invention, controlling the operation of the corresponding module in the heat pump water heating system according to the antifreeze measures includes:

[0029] If the antifreeze mode is the indoor antifreeze mode, the water pump of the heating device in each heating area is started, and the hot water in the buffer tank is diverted to the pipes in each heating area based on the water pump.

[0030] If the antifreeze mode is the first-level outdoor antifreeze mode, the temperature of the heat pump unit is obtained, and when it is determined that the temperature is within the preset outdoor temperature range, the water pump is started to drive the hot water in the buffer tank to circulate between the heat pump unit and the buffer tank through the pipe.

[0031] If the antifreeze mode is the level 2 outdoor antifreeze mode, the heat pump unit is started to heat the water in the buffer water tank; when the water temperature in the buffer water tank reaches the preset heating temperature, the heat pump unit stops and the hot water in the buffer water tank and the water pump are started to circulate the heated water in the pipe between the heat pump unit and the buffer water tank.

[0032] Optionally, in a sixth implementation of the first aspect of the present invention, after controlling the operation of the corresponding module in the heat pump water heating system according to the antifreeze measures, the method further includes:

[0033] Obtain real-time environmental parameters for indoor and outdoor environments;

[0034] Determine whether the real-time environmental parameters meet the preset antifreeze mode exit conditions;

[0035] If the conditions are met, the heat pump water heating system is controlled to exit the corresponding antifreeze mode.

[0036] A second aspect of the present invention provides an antifreeze control device applied to a heat pump water heating system, characterized in that the heat pump water heating system includes a heat pump unit, a buffer tank, and at least two heating devices connected by pipes, each heating device being installed on a corresponding heating area, and temperature sensing units being installed on the pipes, the heat pump unit, the buffer tank, and each heating area; the antifreeze control device includes:

[0037] The acquisition module is used to acquire the environmental parameters and equipment parameters detected by each of the temperature sensing units, wherein the environmental parameters include indoor environmental parameters and outdoor environmental parameters, and the equipment parameters include the operating status of the heat pump unit and the fault status of the temperature sensing unit.

[0038] The judgment module is used to determine whether the indoor environmental parameters, the outdoor environmental parameters, the working status, and the fault status meet the preset judgment conditions for each antifreeze mode.

[0039] The determination module is used to determine the corresponding antifreeze mode based on the determination result when the antifreeze mode determination condition is met, and to determine the corresponding antifreeze measures based on the antifreeze mode.

[0040] The control module is used to control the operation of the corresponding modules in the heat pump water heating system according to the antifreeze measures.

[0041] Optionally, in a first implementation of the second aspect of the present invention, the antifreeze mode includes an outdoor antifreeze mode and an indoor antifreeze mode; the determination module includes:

[0042] The first judgment unit is used to judge whether the indoor environmental parameters, the outdoor environmental parameters, the working status and the fault status meet the judgment conditions corresponding to the indoor antifreeze mode.

[0043] The second judgment unit is used to judge whether the outdoor environmental parameters and the indoor environmental parameters meet the judgment conditions corresponding to the outdoor antifreeze mode.

[0044] The determining unit is configured to determine that the heat pump water heating system has an indoor heating abnormality if the determination result is that only the determination condition corresponding to the indoor antifreeze mode is met; if the determination result is that only the determination condition corresponding to the outdoor antifreeze mode is met; and if the determination result is that both the indoor and outdoor heating abnormalities of the heat pump water heating system are met.

[0045] Optionally, in a second implementation of the second aspect of the present invention, the first determining unit is specifically used for:

[0046] Extract the indoor water temperature from the indoor environmental parameters and the outdoor temperature from the outdoor environmental parameters;

[0047] Determine whether the working state is a stopped state and the duration reaches a preset threshold.

[0048] If so, determine whether the outdoor temperature is less than the outdoor temperature threshold.

[0049] If it is less than, then determine whether the indoor water temperature is less than the indoor temperature threshold and whether the temperature sensing unit is faulty;

[0050] If the indoor water temperature is lower than the indoor temperature threshold or the temperature sensing unit malfunctions, then the AA heat pump water heating system is determined to meet the judgment conditions corresponding to the outdoor antifreeze mode.

[0051] Optionally, in a third implementation of the second aspect of the present invention, the second determining unit is specifically used for:

[0052] Extract the outdoor water temperature and the outdoor temperature from the outdoor environmental parameters;

[0053] The outdoor water temperature and the outdoor temperature are compared with the first outdoor judgment condition and the second outdoor judgment condition, respectively.

[0054] Optionally, in a fourth implementation of the second aspect of the present invention, the outdoor anti-freezing mode includes a primary outdoor anti-freezing mode and a secondary outdoor anti-freezing mode; the determining module is specifically used for:

[0055] If the determination result is that the outdoor water temperature is within the first outdoor determination condition and the outdoor temperature is less than the second outdoor determination condition, then the heat pump water heating system is determined to be in the first-level outdoor antifreeze mode.

[0056] If the determination result is that the outdoor water temperature is less than the minimum value in the first outdoor determination condition and the outdoor temperature is less than the second outdoor determination condition, then the heat pump water heating system is determined to be in the second-level outdoor antifreeze mode.

[0057] Optionally, in a fifth implementation of the second aspect of the present invention, the control module is specifically used for:

[0058] If the antifreeze mode is the indoor antifreeze mode, the water pump of the heating device in each heating area is started, and the hot water in the buffer tank is diverted to the pipes in each heating area based on the water pump.

[0059] If the antifreeze mode is the first-level outdoor antifreeze mode, the temperature of the heat pump unit is obtained, and when it is determined that the temperature is within the preset outdoor temperature range, the water pump is started to drive the hot water in the buffer tank to circulate between the heat pump unit and the buffer tank through the pipe.

[0060] If the antifreeze mode is the level 2 outdoor antifreeze mode, the heat pump unit is started to heat the water in the buffer water tank; when the water temperature in the buffer water tank reaches the preset heating temperature, the heat pump unit stops and the hot water in the buffer water tank and the water pump are started to circulate the heated water in the pipe between the heat pump unit and the buffer water tank.

[0061] Optionally, in a sixth implementation of the second aspect of the present invention, the antifreeze device further includes a detection module, which is specifically used for:

[0062] Obtain real-time environmental parameters for indoor and outdoor environments;

[0063] Determine whether the real-time environmental parameters meet the preset antifreeze mode exit conditions;

[0064] If the conditions are met, the heat pump water heating system is controlled to exit the corresponding antifreeze mode.

[0065] A third aspect of the present invention provides an antifreeze control device, comprising: a memory and at least one processor, wherein the memory stores instructions, and the memory and the at least one processor are interconnected via a circuit; the at least one processor invokes the instructions in the memory to cause the antifreeze control device to perform the steps of the above-described antifreeze control method for a heat pump water heating system.

[0066] A fourth aspect of the present invention provides a computer-readable storage medium storing instructions that, when executed on a computer, cause the computer to perform the steps of the above-described antifreeze control method for a heat pump water heating system.

[0067] The beneficial effects achieved by this application are:

[0068] By implementing the above-mentioned solution, temperature sensing units are installed on pipes, heat pump units, buffer tanks, and each heating area; environmental parameters and equipment parameters detected by each temperature sensing unit are acquired, including indoor and outdoor environmental parameters, and equipment parameters including the operating status of the heat pump unit and the fault status of the temperature sensing unit; it is determined whether the indoor and outdoor environmental parameters, operating status, and fault status meet the preset antifreeze mode judgment conditions; if they meet the conditions, the judgment result determines the corresponding antifreeze mode, and the corresponding antifreeze measures are determined based on the antifreeze mode; the corresponding modules in the heat pump water heating system are controlled to operate according to the antifreeze measures. By determining that the water temperature in other parts of the system has not reached the required temperature for heating and antifreeze operation, the system circulates water from other parts of the system to further utilize the water temperature for antifreeze circulation, reducing the power consumption of the system when entering heating and antifreeze mode. In addition, by setting up a buffer water tank, the buffer water tank is heated while heating and antifreeze are in progress. When the target water temperature is reached, the heat pump unit can be shut down, avoiding the heat pump unit from continuously running to maintain the water temperature. Timely shutdown is also beneficial, as water temperature fluctuations can lead to frequent unit starts, further reducing the energy consumption and lifespan of the heat pump unit. Attached Figure Description

[0069] Figure 1 This is a schematic diagram of the first embodiment of the antifreeze control method for a heat pump water heating system according to the present invention;

[0070] Figure 2 This is a schematic diagram of a second embodiment of the antifreeze control method for a heat pump water heating system according to the present invention;

[0071] Figure 3 This is a schematic diagram of a third embodiment of the antifreeze control method for a heat pump water heating system according to the present invention;

[0072] Figure 4 This is a design drawing of a heat pump water heating system in an embodiment of the present invention;

[0073] Figure 5 This is a schematic diagram of one embodiment of the antifreeze control device in this invention;

[0074] Figure 6 This is a schematic diagram of another embodiment of the antifreeze control device in this invention;

[0075] Figure 7 This is a schematic diagram of one embodiment of the antifreeze control device in this invention. Detailed Implementation

[0076] This invention provides a method, device, equipment, and storage medium for antifreeze control of a heat pump water heating system. By setting indoor environmental parameters, outdoor environmental parameters, and monitoring equipment status, the monitored data is compared with antifreeze control standards. Based on the comparison results, the system selects whether to implement antifreeze control and uses corresponding antifreeze measures to control system operation. This solves the problem in the prior art where frequent system startup in antifreeze control schemes leads to excessive energy consumption and short service life.

[0077] The terms "first," "second," "third," "fourth," etc. (if present) in the specification, claims, and accompanying drawings of this invention are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms "comprising" or "having" and any variations thereof are intended to cover a non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0078] For ease of understanding, the specific process of the embodiments of the present invention is described below. Please refer to [link / reference]. Figure 1 The first embodiment of the antifreeze control method for a heat pump water heating system in this invention is applied to a heat pump water heating system. The heat pump water heating system includes a heat pump unit, a buffer tank, and at least two heating devices connected by pipes. Each heating device is installed in a corresponding heating area. Temperature sensing units are installed on the pipes, the heat pump unit, the buffer tank, and each heating area. These temperature sensing units can be designed using temperature sensors or are readily available temperature detection modules. The pipes are divided into inner and outer pipes. The outer pipe connects the heat pump unit and the buffer tank, while the inner pipe connects the buffer tank and the heating devices, as well as the water pump and radiators within the heating devices. The heating devices include a water pump, a temperature detection unit, radiators, and radiator pipes. The heating devices are driven by the water pump when pumping water from the buffer tank.

[0079] In practical applications, temperature sensors are installed inside the pipes, the heat pump water heater, and the buffer tank to monitor water and equipment temperatures in real time. Temperature sensors are also installed outside the heat pump unit and within the heating area to monitor outdoor and indoor ambient temperatures. The method includes the following steps:

[0080] 101. Obtain the environmental parameters and equipment parameters detected by each temperature sensing unit. The environmental parameters include indoor and outdoor environmental parameters, and the equipment parameters include the operating status of the heat pump unit and the fault status of the temperature sensing unit.

[0081] In this embodiment, the heat pump water heating system reads the data generated by each temperature sensing unit based on the connection link with each temperature sensing unit, and parses the read data to obtain the corresponding parameters, such as environmental parameters and equipment parameters, namely indoor environmental parameters and outdoor environmental parameters, as well as the working status of the heat pump unit and the fault status of the temperature sensing unit.

[0082] In practical applications, the indoor environmental parameters refer to the water temperature of the water entering the heating area from the buffer tank and the ambient temperature within the heating area; the outdoor environmental parameters refer to the water temperature in the pipes between the buffer tank and the heat pump unit and the outdoor ambient temperature; the operating status of the heat pump unit mainly refers to whether the heat pump unit has stopped running and whether the water pump connected to the heat pump unit is running, and may even include whether the heating unit in the heat pump unit has stopped running; the fault status of the temperature sensing unit refers to whether the heat pump hot water system has received the temperature data reported by the temperature sensing unit.

[0083] 102. Determine whether the indoor environmental parameters, outdoor environmental parameters, working status, and fault status meet the preset judgment conditions for each antifreeze mode.

[0084] In this step, the antifreeze mode judgment conditions mainly include two modes: outdoor antifreeze and indoor antifreeze. After obtaining the parameters, it is first determined whether the outdoor environmental parameters and the operating status of the heat pump unit meet the judgment conditions corresponding to the outdoor antifreeze mode. These judgment conditions can be understood as the limit values ​​of various parameters for activating the outdoor antifreeze mode. By comparing the indoor environmental parameters and the operating status of the heat pump unit with the corresponding limit values ​​of each parameter, if the comparison result shows that there is a value less than the parameter limit value, a signal indicating that the judgment conditions for the outdoor antifreeze mode are met is output.

[0085] Similarly, the judgment process for indoor antifreeze mode is similar to that for outdoor mode, except that the parameters being compared are adjusted to indoor environmental parameters and the operating and fault states of the heat pump unit. The specific judgment process will not be repeated here.

[0086] 103. If satisfied, the result of the judgment determines the corresponding antifreeze mode, and the corresponding antifreeze measures are determined based on the antifreeze mode;

[0087] In this embodiment, "satisfying" here refers to whether there is at least one of the judgment conditions for satisfying multiple antifreeze modes in the environmental parameters and equipment parameters of the heat pump water heating system in step 102. If so, it is determined to be satisfied, and the corresponding antifreeze mode is determined based on the comparison parameter limit value.

[0088] Specifically, the anti-freeze mode includes indoor and outdoor modes. If both environmental and equipment parameters are less than all thresholds for the indoor anti-freeze mode, then the indoor anti-freeze mode needs to be activated. If both environmental and equipment parameters are less than all thresholds for the outdoor anti-freeze mode, then the outdoor anti-freeze mode needs to be activated.

[0089] Furthermore, after determining the outdoor and / or indoor antifreeze modes, the corresponding antifreeze measures are selected from the preset antifreeze measures table, and the antifreeze measures are analyzed to obtain the control strategy of the heat pump water heating system.

[0090] 104. Control the operation of the corresponding modules in the heat pump water heating system according to the antifreeze measures.

[0091] In this step, the corresponding system control strategy is determined based on the antifreeze measures, and the operation of each module in the heat pump water heating system is controlled based on the system control strategy, such as starting and stopping operation.

[0092] In practical applications, the system control strategy can be a start / stop control signal or the operating parameters of each module, such as the operating frequency.

[0093] In this embodiment, prior to this step, the temperature difference is calculated based on the judgment result, and the control time of the antifreeze mode is determined based on the temperature difference. Then, when the control system is working according to the antifreeze measures, a timer is started to count down the control time. After the countdown is completed, the control system exits the antifreeze mode.

[0094] In this embodiment of the invention, temperature sensing units are installed on pipes, heat pump units, buffer tanks, and each heating area. Environmental parameters and equipment parameters detected by each temperature sensing unit are acquired. The environmental parameters include indoor and outdoor environmental parameters, and the equipment parameters include the operating status of the heat pump unit and the fault status of the temperature sensing unit. It is determined whether the indoor and outdoor environmental parameters, operating status, and fault status meet preset anti-freeze mode judgment conditions. If they do, the judgment result determines the corresponding anti-freeze mode, and based on the anti-freeze mode, the corresponding anti-freeze measures are determined. The corresponding modules in the heat pump water heating system are controlled to operate according to the anti-freeze measures. This solves the problem in the prior art where frequent system startup in anti-freeze control schemes leads to excessive system energy consumption and short service life, while also reducing the power consumption of the system entering heating anti-freeze mode.

[0095] Please see Figure 2 The second embodiment of the antifreeze control method for a heat pump water heating system in this invention is based on... Figure 4The heat pump water heating system proposed in this paper includes a heat pump unit, a buffer tank, a heating device, and heating areas connected by pipes. Taking two heating areas as an example, these are area 1 and area 2. In this embodiment, area 1 is radiator heating, and area 2 is underfloor heating. The heating of the heat pump water heating system is mainly achieved through the operation of the heat pump unit and the heating device. Specifically, when the heat pump unit is running, it drives the refrigerant to obtain heat from the air and produces hot water. The hot water flows to the buffer tank through a water pump 3, and the water in the buffer tank is heated by the internal coils. The buffer tank is connected to the heat pump unit through inlet and outlet pipes, forming a heating circuit. The buffer tank is also connected to area 1 and area 2 through water pipes. In one embodiment, area 1 is the radiator heating area, and area 2 is the underfloor heating area. Radiant heating has a high radiant heat dissipation and thermal conductivity. On the other hand, since users' feet may come into contact with the chassis, the required temperature in the radiant heating area is generally higher than that in the underfloor heating area. Temperature sensing units are installed in the pipes, heat pump units, buffer water tanks, and each heating area.

[0096] Based on the above system structure, the antifreeze control method for this heat pump water heating system includes the following steps:

[0097] 201. Obtain the indoor environmental parameters, outdoor environmental parameters, operating status of the heat pump unit, and fault status of the temperature sensing units detected by each temperature sensing unit;

[0098] 202. Determine whether the indoor environmental parameters, outdoor environmental parameters, working status, and fault status meet the judgment conditions corresponding to the indoor antifreeze mode.

[0099] In this embodiment, if the judgment result is that only the judgment condition corresponding to the indoor antifreeze mode is met, then it is determined that there is an indoor heating abnormality in the heat pump water heating system.

[0100] In practical applications, the indoor environmental parameters include the indoor ambient temperature and the outlet water temperature of the water pump in the heating device; the outdoor environmental parameters include the outdoor ambient temperature and the inlet and outlet water temperatures of the buffer water tank; and the operating status includes whether the heat pump unit is stopped and whether the water pump connected to the heat pump unit is running.

[0101] The judgment conditions corresponding to the indoor anti-freeze mode include at least the following three. The following three are used as examples to illustrate that the indoor anti-freeze mode is determined when the following conditions are met simultaneously:

[0102] Indoor antifreeze mode judgment conditions:

[0103] ① After the water pump has been turned off for a period of time (e.g., 10 minutes);

[0104] ②Outdoor temperature is less than 2℃ or temperature sensor malfunction;

[0105] ③ Indoor water temperature is less than 6℃ or temperature sensor malfunction;

[0106] When conditions ①, ②, and ③ are met simultaneously, the system enters indoor anti-freeze mode. Specifically:

[0107] Extract the indoor water temperature from the indoor environmental parameters and the outdoor temperature from the outdoor environmental parameters;

[0108] Determine whether the working state is a stopped state and the duration reaches a preset threshold.

[0109] If so, determine whether the outdoor temperature is less than the outdoor temperature threshold.

[0110] If it is less than, then determine whether the indoor water temperature is less than the indoor temperature threshold and whether the temperature sensing unit is faulty;

[0111] If the indoor water temperature is lower than the indoor temperature threshold or the temperature sensing unit malfunctions, then the heat pump water heating system is determined to meet the judgment conditions corresponding to the indoor antifreeze mode.

[0112] Specifically, the purpose of triggering the indoor anti-freeze mode only when conditions ①, ②, and ③ are met simultaneously is to ensure that the water pumps have been shut off for a certain period of time (e.g., pumps 1 and 2 have been shut off for 10 minutes), meaning the water flow in the pipes of area 1 or area 2 has stopped—that is, the water flow in the indoor pipes has stopped—and this is only triggered when the outdoor temperature is below 2°C and the indoor water temperature is below 6°C. This method allows for more accurate judgment. On one hand, entering anti-freeze mode when the outdoor temperature is below 2°C and the indoor water temperature is below 6°C provides advance protection for the pipes in area 1 or area 2. On the other hand, setting the temperature check after the pumps have been shut off for a period of time avoids misjudging the indoor anti-freeze conditions due to water flow in the pipes caused by the pumps being turned on. This can be understood as flowing water being less likely to freeze than static water under the same conditions.

[0113] 203. Determine whether the outdoor and indoor environmental parameters meet the judgment conditions corresponding to the outdoor antifreeze mode;

[0114] In this step, if the judgment result is that only the judgment condition corresponding to the outdoor antifreeze mode is met, then it is determined that the heat pump water heating system has an outdoor heating abnormality.

[0115] If the judgment result is that the judgment conditions corresponding to the indoor antifreeze mode and the outdoor antifreeze mode are met, then it is determined that the indoor and outdoor heating of the heat pump water heating system are both abnormal.

[0116] In this embodiment, the outdoor anti-freeze mode includes at least one level; the following explanation uses a two-level example:

[0117] The judgment conditions corresponding to the outdoor anti-freeze mode include a first outdoor judgment condition and a second outdoor judgment condition; the judgment of whether the outdoor environmental parameters and the indoor environmental parameters meet the judgment conditions corresponding to the outdoor anti-freeze mode includes:

[0118] Extract the outdoor water temperature and the outdoor temperature from the outdoor environmental parameters;

[0119] The outdoor water temperature and the outdoor temperature are compared with the first outdoor judgment condition and the second outdoor judgment condition, respectively.

[0120] Furthermore, the outdoor anti-freezing mode includes a primary outdoor anti-freezing mode and a secondary outdoor anti-freezing mode; the determination of the corresponding anti-freezing mode based on the judgment result includes:

[0121] If the determination result is that the outdoor water temperature is within the first outdoor determination condition and the outdoor temperature is less than the second outdoor determination condition, then the heat pump water heating system is determined to be in the first-level outdoor antifreeze mode.

[0122] If the determination result is that the outdoor water temperature is less than the minimum value in the first outdoor determination condition and the outdoor temperature is less than the second outdoor determination condition, then the heat pump water heating system is determined to be in the second-level outdoor antifreeze mode.

[0123] In practical applications, the judgment condition corresponding to the Level 1 outdoor antifreeze mode is:

[0124] When 2℃ < inlet water temperature ≤ 4℃ and ambient temperature ≤ 0℃, it enters the first-level antifreeze state.

[0125] The judgment conditions for the Level 2 outdoor antifreeze mode are:

[0126] If the inlet water temperature is ≤2℃ and the ambient temperature is ≤0℃, it enters the second-level antifreeze state.

[0127] The inlet water temperature refers specifically to the temperature of the water supply pipes for the buffer tank and heat pump components, and can be referred to as the unit return water temperature.

[0128] 204. If satisfied, the result of the judgment determines the corresponding antifreeze mode, and the corresponding antifreeze measures are determined based on the antifreeze mode;

[0129] 205. If the antifreeze mode is the indoor antifreeze mode, start the water pump of the heating device in each heating area, and divert the hot water in the buffer tank to the pipes in each heating area based on each water pump.

[0130] In practical applications, the zone water pumps, including pump 1 and pump 2, are activated to ensure continuous water flow, preventing the water in the pipes from freezing and bursting. Generally, the buffer tank is located indoors and equipped with insulation. Furthermore, by activating the zone water pumps, the residual heat from the buffer tank is utilized to raise the water temperature throughout the pipes, further mitigating the risk of pipe bursting due to excessively low water temperature in the indoor pipes.

[0131] 206. If the antifreeze mode is the first-level outdoor antifreeze mode, the temperature of the heat pump unit is obtained, and when the temperature is determined to be within the preset outdoor temperature range, the water pump is started to drive the hot water in the buffer tank to circulate between the heat pump unit and the buffer tank through the pipe.

[0132] Specifically, the outdoor temperature is first obtained. When the outdoor temperature (which can be detected by the temperature sensor on the heat pump unit) is within the range (ambient temperature less than 0℃ and water temperature less than 4℃), water pump 3 between the heat pump unit and the buffer tank is turned on. Flowing water is less likely to freeze than static water. Therefore, the water pump drives the water circulation in the pipes. Through the circulation of water and the continuous operation of water pump 3, water flows in the pipes between the heat pump unit and the buffer tank. This can be understood as the mechanical energy driven by the water pump being converted into the kinetic energy of the flowing water. Furthermore, the temperature of the flowing water remains consistent. On the one hand, this avoids excessively low local temperatures in the building, which could lead to ice accumulation in the pipes, thus delaying freezing and maintaining a normal operating water temperature. On the other hand, the power consumption of the water pump circulation is lower than that of the heat pump unit in heating mode. Delaying the transition to the heat pump unit's heating mode for antifreeze also helps reduce system energy consumption and improve energy efficiency.

[0133] 207. If the antifreeze mode is the second-level outdoor antifreeze mode, the heat pump unit will start to heat the water in the buffer water tank; when the water temperature in the buffer water tank reaches the preset heating temperature, the heat pump unit will stop and the hot water in the buffer water tank and the starting water pump will circulate the heated water in the pipe between the heat pump unit and the buffer water tank.

[0134] Specifically, when the outdoor ambient temperature is ≤0℃, the pipes are at risk of freezing and bursting because the ambient temperature is lower than the freezing point of the water in the pipes. In this case, the heat pump unit is turned on to heat the water in the pipes and prevent it from becoming too cold. When the temperature of the buffer tank reaches the target heating temperature (e.g., 10℃), the heat pump unit stops, and the hot water in the buffer tank, along with the starting water pump 3, heats the pipes between the heat pump unit and the buffer tank.

[0135] Furthermore, before initiating the secondary antifreeze step, the temperature of the buffer tank is simultaneously monitored. If the buffer tank temperature meets the circulation requirements (the buffer tank temperature is one value higher than the inlet water temperature (e.g., 4°C)), the water pump is activated, utilizing the water in the buffer tank to circulate in the pipes, preventing premature activation of the heating mode and reducing system energy consumption. This step is similar to the primary antifreeze step, but the detected temperature differs. The primary antifreeze step detected the outdoor temperature, while the subsequent step detects the temperature of the buffer tank. Because buffer tanks are often installed indoors / inside buildings and are typically insulated, their temperature decreases more slowly than the ambient temperature.

[0136] In this embodiment, the temperature of region 1 or region 2 can also be obtained. If the temperature of region 1 or region 2 also meets the circulation conditions, the water can be circulated to the buffer tank by water pump 1 and water pump 2 to raise the temperature of the water in the buffer tank. Then, the water pump 3 circulates the pipeline between the heat pump unit and the buffer tank to further reduce the energy consumption of the system.

[0137] In this embodiment of the invention, by determining that the water temperature in other parts of the system has not reached the required temperature for secondary antifreeze, and by circulating the water in other parts of the system, further utilizing the water temperature in other parts of the system for antifreeze circulation, the system's entry into heating mode is delayed, reducing system power consumption. By setting up a buffer water tank, the buffer water tank is heated while heating and antifreeze are in progress. When the target water temperature is reached, the heat pump unit can be shut down, avoiding the heat pump unit from continuously running to maintain the water temperature and promptly entering the shutdown state. While heating, the hot water in the buffer water tank is circulated to areas 1 and 2 by water pumps 1 and 2, ensuring that the system pipe water temperature remains consistent. This avoids situations where the outdoor pipe water temperature does not meet the antifreeze conditions, or the water temperatures in areas 1 and 2 do not meet the antifreeze conditions, leading to frequent startups of the unit into heating mode, which is beneficial for further reducing the energy consumption and service life of the heat pump unit.

[0138] Please see Figure 3 The third embodiment of the antifreeze control method for a heat pump hot water system in this invention includes:

[0139] 301. Obtain the environmental parameters and equipment parameters detected by each temperature sensing unit. The environmental parameters include indoor and outdoor environmental parameters, and the equipment parameters include the operating status of the heat pump unit and the fault status of the temperature sensing unit.

[0140] In this embodiment, temperature sensing units are installed on pipes, heat pump units, buffer water tanks, and each heating area.

[0141] 302. Determine whether the indoor environmental parameters, outdoor environmental parameters, working status, and fault status meet the preset judgment conditions for each antifreeze mode.

[0142] In this step, the antifreeze mode includes an outdoor antifreeze mode and an indoor antifreeze mode;

[0143] Specifically, the indoor environmental parameters, the outdoor environmental parameters, the working status, and the fault status are judged to determine whether the judgment conditions corresponding to the indoor antifreeze mode are met; and the outdoor environmental parameters and the indoor environmental parameters are judged to determine whether the judgment conditions corresponding to the outdoor antifreeze mode are met.

[0144] If the judgment result is that only the judgment condition corresponding to the indoor antifreeze mode is met, then it is determined that there is an indoor heating abnormality in the heat pump water heating system.

[0145] If the judgment result is that only the judgment condition corresponding to the outdoor antifreeze mode is met, then it is determined that there is an outdoor heating abnormality in the heat pump water heating system.

[0146] If the judgment result is that the judgment conditions corresponding to the indoor antifreeze mode and the outdoor antifreeze mode are met, then it is determined that the indoor and outdoor heating of the heat pump water heating system are both abnormal.

[0147] In practical applications, the criteria for determining outdoor and indoor antifreeze modes are set as follows:

[0148] 1) Indoor antifreeze mode judgment conditions:

[0149] ① After the water pump has been turned off for a period of time (e.g., 10 minutes);

[0150] ②Outdoor temperature is less than 2℃ or temperature sensor malfunction;

[0151] ③ Indoor water temperature is less than 6℃ or temperature sensor malfunction;

[0152] 2) Outdoor frost protection judgment conditions:

[0153] The judgment conditions for Level 1 outdoor antifreeze mode are:

[0154] When 2℃ < inlet water temperature ≤ 4℃ and ambient temperature ≤ 0℃, it enters the first-level antifreeze state.

[0155] The judgment conditions for the Level 2 outdoor antifreeze mode are:

[0156] If the inlet water temperature is ≤2℃ and the ambient temperature is ≤0℃, it enters the second-level antifreeze state.

[0157] The inlet water temperature refers specifically to the temperature of the water supply pipes for the buffer tank and heat pump components, and can be referred to as the unit return water temperature.

[0158] Based on the above judgment conditions, the system identifies whether to enter indoor or outdoor anti-freeze mode, as follows:

[0159] Extract the indoor water temperature from the indoor environmental parameters and the outdoor temperature from the outdoor environmental parameters; determine whether the working state is a stopped state and the duration reaches a preset threshold; if so, determine whether the outdoor temperature is less than the outdoor temperature threshold; if less, determine whether the indoor water temperature is less than the indoor temperature threshold and whether the temperature sensing unit is faulty; if the indoor water temperature is less than the indoor temperature threshold or the temperature sensing unit is faulty, determine that the heat pump water heating system meets the judgment conditions corresponding to the outdoor antifreeze mode.

[0160] The judgment conditions corresponding to the outdoor antifreeze mode include a first outdoor judgment condition and a second outdoor judgment condition; the judgment of whether the outdoor environmental parameters and the indoor environmental parameters meet the judgment conditions corresponding to the outdoor antifreeze mode includes: extracting the outdoor water temperature and the outdoor temperature from the outdoor environmental parameters; and comparing the outdoor water temperature and the outdoor temperature with the first outdoor judgment condition and the second outdoor judgment condition, respectively.

[0161] Furthermore, the antifreeze mode includes a first-level outdoor antifreeze mode and a second-level outdoor antifreeze mode; the determination of the corresponding antifreeze mode by the judgment result includes: if the judgment result is that the outdoor water temperature is within the first outdoor judgment condition and the outdoor temperature is less than the second outdoor judgment condition, then the heat pump water heating system is determined to be in the first-level outdoor antifreeze mode; if the judgment result is that the outdoor water temperature is less than the minimum value in the first outdoor judgment condition and the outdoor temperature is less than the second outdoor judgment condition, then the heat pump water heating system is determined to be in the second-level outdoor antifreeze mode.

[0162] 303. If satisfied, the result of the judgment determines the corresponding antifreeze mode, and the corresponding antifreeze measures are determined based on the antifreeze mode;

[0163] 304. Control the operation of the corresponding modules in the heat pump water heating system according to the antifreeze measures;

[0164] In this step, if the antifreeze mode is the indoor antifreeze mode, the water pump of the heating device in each heating area is started, and the hot water in the buffer tank is diverted to the pipes in each heating area based on the water pump.

[0165] If the antifreeze mode is the first-level outdoor antifreeze mode, the temperature of the heat pump unit is obtained, and when it is determined that the temperature is within the preset outdoor temperature range, water pump 1 and water pump 2 are started to drive the hot water in the buffer tank to circulate between the heat pump unit and the buffer tank through the pipe.

[0166] If the antifreeze mode is the level 2 outdoor antifreeze mode, the heat pump unit is started to heat the water in the buffer water tank; when the water temperature in the buffer water tank reaches the preset heating temperature, the heat pump unit stops, and the hot water in the buffer water tank, along with water pumps 1 and 2, is circulated in the pipe between the heat pump unit and the buffer water tank.

[0167] 305. Obtain real-time indoor and outdoor environmental parameters;

[0168] 306. Determine whether the real-time environmental parameters meet the preset anti-freeze mode exit conditions;

[0169] 307. If satisfied, control the heat pump water heating system to exit the corresponding antifreeze mode.

[0170] In practical applications, the conditions for canceling the indoor antifreeze (water pump) mode can be set as follows: (meeting one of the following conditions is sufficient)

[0171] ①When the outdoor temperature is ≥4℃, the water pump will be turned on for a period of time (4min).

[0172] ② -5℃≤outdoor temperature<4℃ and mixing water outlet temperature>8℃;

[0173] ③ Outdoor temperature < -5℃, and mixing water outlet temperature > 20℃ (the mixing water outlet temperature here refers to the temperature of the three-way valve outlet interface, because this port is connected to the water pipes in the underfloor heating room, so it is necessary to detect the temperature here. If the temperature here is > 8℃, then exit the zone antifreeze mode.

[0174] The conditions for canceling the outdoor antifreeze (water pump) mode can be set as follows:

[0175] Level 1 outdoor antifreeze status: When the inlet water temperature is ≥A04℃+4℃ or the ambient temperature is >1℃, the unit shuts down the water pump and exits Level 1 winter antifreeze status.

[0176] Level 2 outdoor antifreeze mode: When the inlet water temperature is ≥A04℃+11℃ or the ambient temperature is >1℃, the unit will stop heating and return to standby mode.

[0177] In summary, by determining that the water temperature in other parts of the system has not reached the water temperature required for heating and antifreeze, and by circulating the water in other parts of the system, the antifreeze circulation is further utilized to reduce the power consumption of the system when it enters heating and antifreeze mode.

[0178] By setting up a buffer water tank, the heat pump unit can be heated while providing heating and preventing freezing. When the target water temperature is reached, the heat pump unit can be shut down, avoiding the need for the heat pump unit to keep running continuously to maintain the water temperature. This timely shutdown also prevents water temperature fluctuations from causing the unit to start up frequently, further reducing the energy consumption and lifespan of the heat pump unit.

[0179] The above describes the antifreeze control method for the heat pump hot water system in the embodiments of the present invention. The following describes the antifreeze control device in the embodiments of the present invention. Please refer to [link / reference]. Figure 5 One embodiment of the antifreeze control device in this invention is applied to a heat pump water heating system. The heat pump water heating system includes a heat pump unit, a buffer tank, and at least two heating devices connected by pipes. Each heating device is installed in a corresponding heating area. Temperature sensing units are installed on the pipes, the heat pump unit, the buffer tank, and each heating area. The antifreeze control device includes:

[0180] The acquisition module 501 is used to acquire the environmental parameters and equipment parameters detected by each of the temperature sensing units, wherein the environmental parameters include indoor environmental parameters and outdoor environmental parameters, and the equipment parameters include the operating status of the heat pump unit and the fault status of the temperature sensing unit.

[0181] The judgment module 502 is used to determine whether the indoor environmental parameters, the outdoor environmental parameters, the working status and the fault status meet the preset judgment conditions of each antifreeze mode;

[0182] The determining module 503 is used to determine the corresponding antifreeze mode based on the result of the determination when the antifreeze mode determination condition is met, and to determine the corresponding antifreeze measures based on the antifreeze mode.

[0183] The control module 504 is used to control the operation of the corresponding module in the heat pump water heating system according to the antifreeze measures.

[0184] In this embodiment of the invention, by setting indoor environmental parameters, outdoor environmental parameters, and monitoring equipment status, the monitored data is compared with the antifreeze control standard, and the antifreeze control is selected based on the comparison result. The corresponding antifreeze measures are then used to control the system operation, which solves the problem in the prior art where the antifreeze control scheme frequently starts the system, resulting in excessive energy consumption and short service life.

[0185] Please see Figure 6Another embodiment of the antifreeze control device in this invention is applied to a heat pump water heating system. The heat pump water heating system includes a heat pump unit, a buffer tank, and at least two heating devices connected by pipes. Each heating device is installed in a corresponding heating area. Temperature sensing units are installed on the pipes, the heat pump unit, the buffer tank, and each heating area. The antifreeze control device includes:

[0186] The acquisition module 501 is used to acquire the environmental parameters and equipment parameters detected by each of the temperature sensing units, wherein the environmental parameters include indoor environmental parameters and outdoor environmental parameters, and the equipment parameters include the operating status of the heat pump unit and the fault status of the temperature sensing unit.

[0187] The judgment module 502 is used to determine whether the indoor environmental parameters, the outdoor environmental parameters, the working status and the fault status meet the preset judgment conditions of each antifreeze mode;

[0188] The determining module 503 is used to determine the corresponding antifreeze mode based on the result of the determination when the antifreeze mode determination condition is met, and to determine the corresponding antifreeze measures based on the antifreeze mode.

[0189] The control module 504 is used to control the operation of the corresponding module in the heat pump water heating system according to the antifreeze measures.

[0190] In this embodiment, the antifreeze mode includes an outdoor antifreeze mode and an indoor antifreeze mode; the judgment module 502 includes:

[0191] The first judgment unit 5021 is used to judge whether the indoor environmental parameters, the outdoor environmental parameters, the working state and the fault state meet the judgment conditions corresponding to the indoor antifreeze mode.

[0192] The second judgment unit 5022 is used to judge whether the outdoor environmental parameters and the indoor environmental parameters meet the judgment conditions corresponding to the outdoor antifreeze mode.

[0193] The determining unit 5023 is configured to determine that the heat pump water heating system has an indoor heating abnormality if the determination result is that only the determination condition corresponding to the indoor antifreeze mode is met; if the determination result is that only the determination condition corresponding to the outdoor antifreeze mode is met; and if the determination result is that both the indoor and outdoor antifreeze modes are met, then the heat pump water heating system has an outdoor heating abnormality.

[0194] In this embodiment, the first determination unit 5021 is specifically used for:

[0195] Extract the indoor water temperature from the indoor environmental parameters and the outdoor temperature from the outdoor environmental parameters;

[0196] Determine whether the working state is a stopped state and the duration reaches a preset threshold.

[0197] If so, determine whether the outdoor temperature is less than the outdoor temperature threshold.

[0198] If it is less than, then determine whether the indoor water temperature is less than the indoor temperature threshold and whether the temperature sensing unit is faulty;

[0199] If the indoor water temperature is lower than the indoor temperature threshold or the temperature sensing unit malfunctions, then the heat pump water heating system is determined to meet the judgment conditions corresponding to the indoor antifreeze mode.

[0200] In this embodiment, the second determination unit 5022 is specifically used for:

[0201] Extract the outdoor water temperature and the outdoor temperature from the outdoor environmental parameters;

[0202] The outdoor water temperature and the outdoor temperature are compared with the first outdoor judgment condition and the second outdoor judgment condition, respectively.

[0203] In this embodiment, the outdoor anti-freezing mode includes a primary outdoor anti-freezing mode and a secondary outdoor anti-freezing mode; the determining module 503 is specifically used for:

[0204] If the determination result is that the outdoor water temperature is within the first outdoor determination condition and the outdoor temperature is less than the second outdoor determination condition, then the heat pump water heating system is determined to be in the first-level outdoor antifreeze mode.

[0205] If the determination result is that the outdoor water temperature is less than the minimum value in the first outdoor determination condition and the outdoor temperature is less than the second outdoor determination condition, then the heat pump water heating system is determined to be in the second-level outdoor antifreeze mode.

[0206] In this embodiment, the control module 504 is specifically used for:

[0207] If the antifreeze mode is the indoor antifreeze mode, the water pump of the heating device in each heating area is started, and the hot water in the buffer tank is diverted to the pipes in each heating area based on the water pump.

[0208] If the antifreeze mode is the first-level outdoor antifreeze mode, the temperature of the heat pump unit is obtained, and when it is determined that the temperature is within the preset outdoor temperature range, the water pump is started to drive the hot water in the buffer tank to circulate between the heat pump unit and the buffer tank through the pipe.

[0209] If the antifreeze mode is the level 2 outdoor antifreeze mode, the heat pump unit is started to heat the water in the buffer water tank; when the water temperature in the buffer water tank reaches the preset heating temperature, the heat pump unit stops and the hot water in the buffer water tank and the water pump are started to circulate the heated water in the pipe between the heat pump unit and the buffer water tank.

[0210] In this embodiment, the antifreeze device further includes a detection module 505, which is specifically used for:

[0211] Obtain real-time environmental parameters for indoor and outdoor environments;

[0212] Determine whether the real-time environmental parameters meet the preset antifreeze mode exit conditions;

[0213] If the conditions are met, the heat pump water heating system is controlled to exit the corresponding antifreeze mode.

[0214] In this embodiment of the invention, temperature sensing units are installed on pipes, heat pump units, buffer tanks, and each heating area. Environmental parameters and equipment parameters detected by each temperature sensing unit are acquired. The environmental parameters include indoor and outdoor environmental parameters, and the equipment parameters include the operating status of the heat pump unit and the fault status of the temperature sensing unit. It is determined whether the indoor and outdoor environmental parameters, operating status, and fault status meet preset anti-freeze mode judgment conditions. If they do, the judgment result determines the corresponding anti-freeze mode, and based on the anti-freeze mode, the corresponding anti-freeze measures are determined. The corresponding modules in the heat pump water heating system are controlled to operate according to the anti-freeze measures. This solves the problem in the prior art where frequent system startup in anti-freeze control schemes leads to excessive system energy consumption and short service life, while also reducing the power consumption of the system entering heating anti-freeze mode.

[0215] above Figure 5 and Figure 6 The antifreeze control device in the embodiments of the present invention will be described in detail from the perspective of modular functional entities. The antifreeze control device in the embodiments of the present invention will be described in detail from the perspective of hardware processing.

[0216] Figure 7This is a schematic diagram of an antifreeze control device 700 provided in an embodiment of the present invention. The antifreeze control device 700 can vary significantly due to different configurations or performance characteristics. It may include one or more central processing units (CPUs) 710 (e.g., one or more processors) and a memory 720, and one or more storage media 730 (e.g., one or more mass storage devices) for storing application programs 733 or data 732. The memory 720 and storage media 730 can be temporary or persistent storage. The program stored in the storage media 730 may include one or more modules (not shown in the diagram), each module may include a series of instruction operations on the express sorting device 700. Furthermore, the processor 710 may be configured to communicate with the storage media 730 and execute the series of instruction operations in the storage media 730 on the antifreeze control device 700.

[0217] The anti-freeze control device 700 may also include one or more power supplies 740, one or more wired or wireless network interfaces 750, one or more input / output interfaces 760, and / or one or more operating systems 731, such as Windows Server, Mac OS X, Unix, Linux, FreeBSD, etc. Those skilled in the art will understand that... Figure 7 The illustrated antifreeze control device structure does not constitute a limitation on the antifreeze control device, and may include more or fewer components than illustrated, or combine certain components, or have different component arrangements.

[0218] The present invention also provides a computer-readable storage medium, which can be a non-volatile computer-readable storage medium or a volatile computer-readable storage medium, wherein the computer-readable storage medium stores instructions that, when the instructions are executed on a computer, cause the computer to perform the steps of the antifreeze control method for the heat pump water heating system.

[0219] Those skilled in the art will clearly understand that, for the sake of convenience and brevity, the specific working process of the system, device, or unit described above can be referred to the corresponding process in the foregoing method embodiments, and will not be repeated here.

[0220] If the integrated unit is implemented as 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 invention, in essence, 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. This computer software product is stored in a storage medium and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of the present invention. The aforementioned storage medium includes various media capable of storing program code, such as USB flash drives, portable hard drives, read-only memory (ROM), random access memory (RAM), magnetic disks, or optical disks.

[0221] The above-described embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A method for antifreeze control in a heat pump water heating system, applied to a heat pump water heating system, characterized in that, The heat pump water heating system includes a heat pump unit, a buffer tank, and at least two heating devices connected by pipes. Each heating device is installed in a corresponding heating area. Temperature sensing units are installed on the pipes, the heat pump unit, the buffer tank, and each heating area. The antifreeze control method includes: The environmental parameters and equipment parameters detected by each of the temperature sensing units are obtained, wherein the environmental parameters include indoor environmental parameters and outdoor environmental parameters, and the equipment parameters include the operating status of the heat pump unit and the fault status of the temperature sensing unit. Determine whether the indoor environmental parameters, the outdoor environmental parameters, the working status, and the fault status meet the preset judgment conditions for each antifreeze mode; If the conditions are met, the result of the judgment determines the corresponding antifreeze mode, and the corresponding antifreeze measures are determined based on the antifreeze mode. The corresponding modules in the heat pump water heating system are controlled to operate according to the aforementioned antifreeze measures. The anti-freeze mode includes an outdoor anti-freeze mode and an indoor anti-freeze mode. The step of determining whether the indoor environmental parameters, the outdoor environmental parameters, the operating status, and the fault status meet the preset judgment conditions for each anti-freeze mode includes: determining whether the indoor environmental parameters, the outdoor environmental parameters, the operating status, and the fault status meet the judgment conditions corresponding to the indoor anti-freeze mode; determining whether the outdoor environmental parameters and the indoor environmental parameters meet the judgment conditions corresponding to the outdoor anti-freeze mode; if the judgment result is that only the judgment conditions corresponding to the indoor anti-freeze mode are met, then it is determined that the heat pump water heating system has an indoor heating anomaly; if the judgment result is that only the judgment conditions corresponding to the outdoor anti-freeze mode are met, then it is determined that the heat pump water heating system has an outdoor heating anomaly; if the judgment result is that both the indoor and outdoor anti-freeze modes meet the judgment conditions, then it is determined that the heat pump water heating system has heating anomalies both indoors and outdoors.

2. The antifreeze control method according to claim 1, characterized in that, The step of determining whether the indoor environmental parameters, the outdoor environmental parameters, the operating status, and the fault status meet the judgment conditions corresponding to the indoor antifreeze mode includes: Extract the indoor water temperature from the indoor environmental parameters and the outdoor temperature from the outdoor environmental parameters; Determine whether the working state is a stopped state and the duration reaches a preset threshold. If so, determine whether the outdoor temperature is less than the outdoor temperature threshold. If it is less than, then determine whether the indoor water temperature is less than the indoor temperature threshold and whether the temperature sensing unit is faulty; If the indoor water temperature is lower than the indoor temperature threshold or the temperature sensing unit malfunctions, then the heat pump water heating system is determined to meet the judgment conditions corresponding to the indoor antifreeze mode.

3. The antifreeze control method according to claim 1, characterized in that, The judgment conditions corresponding to the outdoor antifreeze mode include a first outdoor judgment condition and a second outdoor judgment condition. The step of determining whether the outdoor environmental parameters and the indoor environmental parameters meet the judgment conditions corresponding to the outdoor antifreeze mode includes: Extract the outdoor water temperature and the outdoor temperature from the outdoor environmental parameters; The outdoor water temperature and the outdoor temperature are compared with the first outdoor judgment condition and the second outdoor judgment condition, respectively.

4. The antifreeze control method according to claim 3, characterized in that, The outdoor anti-freezing mode includes a first-level outdoor anti-freezing mode and a second-level outdoor anti-freezing mode; The result of the judgment determines the corresponding antifreeze mode, including: If the result of the judgment is that the outdoor water temperature is within the first outdoor judgment condition and the outdoor temperature is less than the second outdoor judgment condition, then the heat pump water heating system is determined to be in the first-level outdoor antifreeze mode. If the result of the judgment is that the outdoor water temperature is less than the minimum value in the first outdoor judgment condition and the outdoor temperature is less than the second outdoor judgment condition, then the heat pump water heating system is determined to be in the second-level outdoor antifreeze mode.

5. The antifreeze control method according to any one of claims 1-4, characterized in that, The step of controlling the operation of the corresponding module in the heat pump water heating system according to the antifreeze measures includes: If the antifreeze mode is the indoor antifreeze mode, the water pump of the heating device in each heating area is started, and the hot water in the buffer tank is diverted to the pipes in each heating area based on the water pump. If the antifreeze mode is the first-level outdoor antifreeze mode, the temperature of the heat pump unit is obtained, and when it is determined that the temperature is within the preset outdoor temperature range, the water pump is started to drive the hot water in the buffer tank to circulate between the heat pump unit and the buffer tank through the pipe. If the antifreeze mode is the level 2 outdoor antifreeze mode, the heat pump unit is started to heat the water in the buffer water tank; when the water temperature in the buffer water tank reaches the preset heating temperature, the heat pump unit stops and the hot water in the buffer water tank and the water pump are started to circulate the heated water in the pipe between the heat pump unit and the buffer water tank.

6. The antifreeze control method according to any one of claims 1-4, characterized in that, After controlling the corresponding module in the heat pump water heating system to operate according to the antifreeze measures, the method further includes: Obtain real-time environmental parameters for indoor and outdoor environments; Determine whether the real-time environmental parameters meet the preset antifreeze mode exit conditions; If the conditions are met, the heat pump water heating system is controlled to exit the corresponding antifreeze mode.

7. An antifreeze control device, applied to a heat pump water heating system, characterized in that, The heat pump water heating system includes a heat pump unit, a buffer tank, and at least two heating devices connected by pipes. Each heating device is installed in a corresponding heating area. Temperature sensing units are installed on the pipes, the heat pump unit, the buffer tank, and each heating area. The antifreeze control device includes: The acquisition module is used to acquire the environmental parameters and equipment parameters detected by each of the temperature sensing units, wherein the environmental parameters include indoor environmental parameters and outdoor environmental parameters, and the equipment parameters include the operating status of the heat pump unit and the fault status of the temperature sensing unit. The judgment module is used to determine whether the indoor environmental parameters, the outdoor environmental parameters, the working status, and the fault status meet the preset judgment conditions for each antifreeze mode. The determination module is used to determine the corresponding antifreeze mode based on the determination result when the antifreeze mode determination condition is met, and to determine the corresponding antifreeze measures based on the antifreeze mode. The control module is used to control the operation of the corresponding module in the heat pump water heating system according to the antifreeze measures. The anti-freeze mode includes an outdoor anti-freeze mode and an indoor anti-freeze mode. The step of determining whether the indoor environmental parameters, the outdoor environmental parameters, the operating status, and the fault status meet the preset judgment conditions for each anti-freeze mode includes: determining whether the indoor environmental parameters, the outdoor environmental parameters, the operating status, and the fault status meet the judgment conditions corresponding to the indoor anti-freeze mode; determining whether the outdoor environmental parameters and the indoor environmental parameters meet the judgment conditions corresponding to the outdoor anti-freeze mode; if the judgment result is that only the judgment conditions corresponding to the indoor anti-freeze mode are met, then it is determined that the heat pump water heating system has an indoor heating anomaly; if the judgment result is that only the judgment conditions corresponding to the outdoor anti-freeze mode are met, then it is determined that the heat pump water heating system has an outdoor heating anomaly; if the judgment result is that both the indoor and outdoor anti-freeze modes meet the judgment conditions, then it is determined that the heat pump water heating system has heating anomalies both indoors and outdoors.

8. An antifreeze control device, characterized in that, The antifreeze control device includes: a memory and at least one processor, wherein the memory stores instructions, and the memory and the at least one processor are interconnected via a line; The at least one processor invokes the instructions in the memory to cause the antifreeze control device to perform the steps of the antifreeze control method for the heat pump water heating system as described in any one of claims 1-6.

9. A computer-readable storage medium storing a computer program thereon, characterized in that, When the computer program is executed by the processor, it implements each step of the antifreeze control method for the heat pump water heating system as described in any one of claims 1-6.

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