Control method of heat pump water heater and heat pump water heater

Abstract

The invention relates to the technical field of hot water supply equipment, and discloses a control method of a heat-pump water heater and the heat-pump water heater, and the control method comprises the following steps: acquiring the water consumption of the heat-pump water heater under the condition that the water temperature in a water tank inner container meets a target temperature and the heat-pump water heater is in a water using state; based on the water consumption of the heat pump water heater, the movement speed of the separation wheel is determined; based on the movement speed of the separation wheel, the separation wheel is controlled to move in the direction close to the water outlet pipe in the axial direction of the water tank inner container. The movement speed of the separation wheel is determined according to the water consumption, the separation wheel is controlled to move in the direction close to the water outlet pipe in the axial direction of the water tank inner container, it is guaranteed that when a user continuously uses hot water, the actual water outlet temperature is always close to the water outlet temperature preset by the user, and the hot water output rate is increased. And the separation wheel can reduce mixing of cold water and hot water in the water tank inner container, so that the hot water using time of a user is prolonged, and the water using comfort is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of hot water supply equipment, and in particular to a control method for a heat pump water heater and a heat pump water heater. Background Art

[0002] Heat pump water heaters, also known as air source heat pump water heaters, are widely used because of their energy saving and high efficiency. In the use of traditional heat pump water heaters, as users continue to use water, hot water in the water tank is continuously output and cold water is continuously replenished. The cold water will mix with the hot water, causing the actual water outlet temperature to gradually decrease during the water use process and differ greatly from the preset water outlet temperature, thus causing the user's water experience to deteriorate. Summary of the invention

[0003] The technical problem solved by the present invention is to provide a control method for a heat pump water heater, which effectively solves the technical problem that the actual outlet water temperature differs greatly from the preset outlet water temperature during continuous water use.

[0004] The above technical problems are solved by the following technical solutions:

[0005] A control method for a heat pump water heater, the heat pump water heater comprising a water tank liner, a separation wheel arranged in the water tank liner, a connected water outlet pipe arranged at the top of the water tank liner, and a water inlet pipe arranged at the bottom of the water tank liner, wherein the separation wheel can move along the axial direction of the water tank liner;

[0006] The method comprises:

[0007] When the water temperature in the water tank inner tank meets the target temperature and the heat pump water heater is in a water use state, obtaining the water consumption of the heat pump water heater;

[0008] determining a movement speed of the partition wheel based on a water consumption of the heat pump water heater;

[0009] Based on the movement speed of the separation wheel, the separation wheel is controlled to move along the axial direction of the water tank inner container toward the direction close to the water outlet pipe.

[0010] Compared with the background technology, the control method of the heat pump water heater described in the present invention has the following beneficial effects: a separator wheel is set in the water tank inner tank to limit the mixing of hot water in the water tank inner tank and cold water entering the water tank inner tank. When the water temperature in the water tank inner tank of the heat pump water heater meets the target temperature and is in a water-using state, the movement speed of the separator wheel is determined according to the water consumption of the heat pump water heater, and the separator wheel is controlled to move along the axial direction of the water tank inner tank toward the water outlet pipe, so that the hot water between the separator wheel and the water outlet pipe can continue to flow from the water outlet pipe to the water-using end, while ensuring that the water supply temperature between the separator wheel and the water outlet pipe meets the user's needs, thereby ensuring that the actual water outlet temperature is always close to the user's preset water outlet temperature, improving the hot water output rate while improving the water use comfort.

[0011] In one embodiment, determining the movement speed of the separation wheel based on the water consumption of the heat pump water heater includes:

[0012] In response to the water consumption being less than a first preset water consumption, maintaining the separation wheel at an initial position;

[0013] In response to the water consumption being between a first preset water consumption and a second preset water consumption, determining the movement speed of the separation wheel to be a first target speed, the second preset water consumption being greater than the first preset water consumption;

[0014] In response to the water consumption being greater than or equal to the second preset water consumption, the movement speed of the partition wheel is determined to be a second target speed, and the second target speed is less than the first target speed.

[0015] Beneficial effect: By dividing the inner tank of the water tank into multiple water storage areas, each water storage area corresponds to a fixed water storage capacity. When the actual water consumption is less than the first preset water consumption, the user's water demand is small, the hot water in the inner tank of the water tank can supply the user's water demand, and can ensure that the water outlet temperature meets the user's preset water outlet temperature, so the control separation wheel is kept in the initial position, so that when the user continues to use water, the separation wheel can respond quickly. When the actual water consumption is between the first preset water consumption and the second preset water consumption, the movement speed of the separation wheel is determined to be the first target speed, and the separation wheel is controlled to move at the first target speed. When the water consumption is greater than or equal to the second preset water consumption, the movement speed of the separation wheel is determined to be the second target speed, and the separation wheel is controlled to move at the second target speed. According to different water consumption, the separation wheel is determined to move in the direction close to the water outlet pipe at the first target speed or the second target speed, so as to further ensure the hot water output rate when the user continues to use hot water, extend the time the user uses hot water, and thus improve the water comfort.

[0016] In one embodiment, determining the movement speed of the separation wheel as the first target speed includes:

[0017] Obtaining the flow rate of the heat pump water heater and the operating time of the water flow sensor;

[0018] The first target speed is calculated based on the flow rate, the operating time of the water flow sensor and the structural parameters of the heat pump water heater; wherein the flow rate includes an outlet flow rate and an inlet flow rate, and the water flow sensor includes an outlet flow sensor and an inlet flow sensor.

[0019] Beneficial effect: The flow rate of the heat pump water heater, that is, the speed at which hot water flows in the outlet pipe or inlet pipe of the heat pump water heater, is obtained through the water flow sensor; and the operation time of the water flow sensor during the current water use is further obtained, and the first target speed is calculated in combination with the structural parameters of the heat pump water heater, and then the separation wheel is controlled to move at the calculated first target speed, so that the mixing of cold water and hot water in the water tank liner can be effectively reduced, and the water supply temperature in the water tank liner can be ensured. Among them, the structural parameters of the heat pump water heater include the cross-sectional area of ​​the outlet pipe or inlet pipe, the cross-sectional area of ​​the water tank liner, etc.

[0020] In one embodiment, the first target speed is calculated using the following formula:

[0021] V1 = (AV2) / (tS);

[0022] Among them, V1 is the first target speed; A is the cross-sectional area of ​​the water outlet pipe; V2 is the water outlet flow rate; t is the operating time of the water outlet flow sensor; S is the cross-sectional area of ​​the water tank inner liner; or, V1 is the first target speed; A is the cross-sectional area of ​​the water inlet pipe; V2 is the water inlet flow rate; t is the operating time of the water inlet flow sensor; S is the cross-sectional area of ​​the water tank inner liner.

[0023] In one embodiment, the target temperature includes a first set target temperature and a second set target temperature; after determining that the movement speed of the partition wheel is the second target speed, the method further includes:

[0024] Controlling the heat pump water heater to enter a heating mode, and detecting the current water temperature in the water tank during the heating process;

[0025] In response to the current water temperature being lower than the first set target temperature, the partition wheel is controlled to stop moving.

[0026] Beneficial effect: When the dividing wheel moves at the second target speed, the amount of hot water used in the water tank is relatively large; at this time, the heat pump water heater is controlled to enter the heating mode, thereby controlling the condenser in the heat pump water heater to heat the water tank, thereby increasing the water temperature in the water tank to meet the user's hot water needs. In the process of heating the water tank, the current water temperature in the water tank is detected by the temperature sensor, and the current water temperature is compared with the first set target temperature. When the current water temperature is lower than the first set target temperature, the water supply temperature in the water tank is low and cannot meet the user's water demand; at this time, the dividing wheel is controlled to stop moving to avoid unnecessary mechanical movement, and at the same time, it can also save energy to a certain extent.

[0027] In one embodiment, after controlling the separation wheel to stop moving, the method further comprises:

[0028] In response to the current water temperature being greater than or equal to a second set target temperature, the partition wheel is controlled to move to the initial position; the second set target temperature is greater than the first set target temperature.

[0029] Beneficial effect: After the dividing wheel is controlled to stop moving, the temperature sensor continues to detect the current water temperature in the water tank inner tank; therefore, when it is detected that the current water temperature is greater than or equal to the second set target temperature, the water supply temperature in the water tank inner tank meets the user's usage requirements; the dividing wheel is further controlled to move to an initial position away from the water outlet pipe, and the heat pump water heater is controlled to enter a standby state, so that when the user uses hot water again, the dividing wheel can move axially from the initial position toward the water outlet pipe again, so as to ensure the water supply temperature when the user continues to use hot water, and meet the user's usage requirements for hot water temperature.

[0030] In one embodiment, before obtaining the water consumption of the heat pump water heater, the method further includes:

[0031] When the heat pump water heater is in the on state, obtaining the current water temperature in the water tank;

[0032] In response to the current water temperature being lower than the second set target temperature, controlling the heat pump water heater to enter a heating mode;

[0033] In response to the heat pump water heater being in the heating mode, the heat pump water heater is controlled to heat the water tank.

[0034] Beneficial effect: When the heat pump water heater is turned on and in the on state, the current water temperature in the water tank is detected by the temperature sensor installed in the water tank. The current water temperature is compared with the preset second set target temperature; if the current water temperature is less than the second set target temperature, the heat pump water heater is controlled to enter the heating mode. When the heat pump water heater enters the heating mode, the controller controls the heat pump water heater to heat the water tank, thereby increasing the water supply temperature in the water tank.

[0035] In one embodiment, after controlling the heat pump water heater to heat the water tank liner, the method further includes:

[0036] Obtaining the current water temperature in the water tank liner after heating the water tank liner;

[0037] In response to the current water temperature being greater than or equal to the second set target temperature, the heat pump water heater is controlled to exit the heating mode and enter a standby state.

[0038] Beneficial effect: When the heat pump water heater is in heating mode and continues to heat the water tank, the current water temperature in the water tank is obtained according to the temperature sensor; it is judged whether the current water temperature in the water tank meets the preset second set target temperature. When the current water temperature is greater than or equal to the second set target temperature, the water temperature in the water tank has reached the target temperature set by the user. At this time, the heat pump water heater is controlled to exit the heating mode and enter the standby state to avoid energy waste caused by continued heating, and it can also prevent the water supply temperature from being too high to ensure the safety of users using hot water. When the heat pump water heater is in standby mode, the heating mode can be restarted at any time according to the change of the water supply temperature in the water tank to ensure the continuous supply of hot water.

[0039] In one embodiment, the heat pump water heater further includes a display panel, and the method further includes:

[0040] The display panel displays the water supply temperature in the water tank inner tank and the available water supply amount in the water tank inner tank.

[0041] Beneficial effects: By setting a display panel on the heat pump water heater, the water supply temperature in the water tank and the available water supply of the hot water in the water tank can be displayed on the display panel, thereby providing intuitive water supply information for users, allowing users to clearly understand the working status of the heat pump water heater; allowing users to reasonably arrange the use of hot water according to the available water supply of the hot water in the water tank to avoid the situation of insufficient hot water. By simultaneously displaying the water supply temperature and the available water supply on the display panel, the user experience is improved, allowing users to use hot water more reasonably.

[0042] On the other hand, the present invention further provides a heat pump water heater, comprising: a memory, a processor, a communication interface and a communication bus, wherein the processor, the memory and the communication interface communicate with each other through the communication bus;

[0043] The memory is used to store at least one executable instruction, and the executable instruction enables the processor to execute the control method of the heat pump water heater as described above. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0045] Figure 1 A schematic flow chart of a control method for a heat pump water heater according to an embodiment of the present invention;

[0046] Figure 2 A schematic structural diagram of a heat pump water heater according to an embodiment of the present invention;

[0047] Figure 3 It is a structural schematic diagram of a heat pump water heater according to another embodiment of the present invention;

[0048] Figure 4 A schematic flow chart of a control method for a heat pump water heater according to another embodiment of the present invention;

[0049] Figure 5 A schematic flow chart of a control method for a heat pump water heater according to another embodiment of the present invention;

[0050] Figure 6 A schematic flow chart of a control method for a heat pump water heater according to another embodiment of the present invention;

[0051] Figure 7 A schematic flow chart of a control method for a heat pump water heater according to another embodiment of the present invention;

[0052] Figure 8 A schematic flow chart of a control method for a heat pump water heater according to another embodiment of the present invention;

[0053] Fig. 9 The figure is a schematic structural diagram of a heat pump water heater according to another embodiment of the present invention.

[0054] Description of reference numerals:

[0055] 11. Water tank liner; 111. Separating wheel; 112. First limiting structure; 113. Second limiting structure; 114. Transmission member; 115. Temperature sensor; 116. Cylindrical section; 117. Arc section; 118. Fixing member; 12. Driving assembly; 13. Water outlet pipe; 14. Water inlet pipe; 141. Water inlet flow sensor; 15. Drain pipe. DETAILED DESCRIPTION

[0056] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0057] In the description of the present application, it should be understood that the terms "center", "up", "down", "front", "back", "left", "right", "top", "bottom", "inside", "outside", 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.

[0058] The terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, unless otherwise specified, "plurality" means two or more.

[0059] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "connected" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0060] Combine the following Figures 1 to 9 , describing an embodiment of the present invention.

[0061] According to an embodiment of the present invention, on the one hand, Figure 2 , Figure 3As shown, a heat pump water heater is provided, including a shell and a water tank liner 11, a driving assembly 12, a transmission member 114 and a separation wheel 111 arranged in the shell; the driving assembly 12 is arranged on the top of the water tank liner 11, and the transmission member 114 is arranged inside the water tank liner 11; the driving assembly 12 is connected to the transmission member 114; the separation wheel 111 is arranged inside the water tank liner 11 and is connected to the transmission member 114; the separation wheel 111 abuts against the side wall of the water tank liner 11, and the driving assembly 12 can overcome the interference resistance and drive the separation wheel 111 to move up and down in the water tank liner 11; the separation wheel 111 is used to limit the mixing of the heated hot water in the water tank liner 11 and the cold water introduced into the water tank liner. Among them, the driving assembly 12 can be a stepping motor, and the movement of the separation wheel 111 is driven by the forward or reverse rotation of the stepping motor.

[0062] In one embodiment, it also includes a water inlet pipe 14, a water outlet pipe 13 and a drain pipe 15, all of which are connected to the water tank inner liner 11; a plurality of water holes are provided on the separator wheel 111, and the sum of the cross-sectional areas of the plurality of water holes is at least a target multiple of the cross-sectional area of ​​any one of the water inlet pipe 14, the water outlet pipe 13 and the drain pipe 15.

[0063] In this embodiment, the drain pipe 15 is arranged at the bottom of the water tank liner 11 and is connected to the water tank liner 11, and is used to discharge the water flow and impurities in the water tank liner 11; a drain pipe solenoid valve is also arranged on the drain pipe 15, and the drain pipe 15 is controlled by the drain pipe solenoid valve. The water inlet pipe 14 is arranged above the drain pipe 15 and is connected to the water tank liner 11, and is used to pass cold water into the water tank liner 11; a water inlet pipe solenoid valve is arranged on the water inlet pipe 14, and is used to control the on and off of the water inlet pipe 14; a water inlet flow sensor 141 is also arranged on the water inlet pipe 14, and is used to count the amount of water entering the water tank liner 11. The water outlet pipe 13 is arranged at the top of the water tank liner 11 and is connected to the water tank liner 11, and is used to transmit the water flow in the water tank liner 11 to the water use end; a water outlet pipe solenoid valve is arranged on the water outlet pipe 13, and is used to control the on and off of the water outlet pipe 13. By providing an inlet pipe 14, an outlet pipe 13 and a drain pipe 15, and connecting them to the water tank liner 11 respectively, the normal inflow, outflow and discharge of water can be ensured, so that the heat pump water heater can operate normally. Furthermore, a temperature sensor 115 is also provided in the water tank liner 11 to detect the water temperature of the water tank liner 11; the water temperature and water flow are then fed back to the heat pump water heater for subsequent decision-making. A plurality of water holes are provided on the dividing wheel 111, wherein the target multiples can be 1.5 times, 2 times, 2.5 times, 3 times, etc., which can be set according to actual use requirements without specific restrictions. By setting a suitable total cross-sectional area of ​​the water holes, the obstruction of the dividing wheel 111 to the water flow can be reduced, and the water flow can smoothly pass through the area where the dividing wheel 111 is located without affecting the normal water inlet, outlet and drainage functions of the water tank.

[0064] In one achievable method, the sum of the cross-sectional areas of the water holes is at least twice the cross-sectional area of ​​any one of the water inlet pipe 14, the water outlet pipe 13 and the drain pipe 15, or the sum of the cross-sectional areas of the water holes is at least twice the sum of the cross-sectional areas of the water inlet pipe 14, the water outlet pipe 13 and the drain pipe 15. If the cross-sectional area of ​​the water holes is too small, the separator wheel 111 may cause a large obstruction to the water flow during the normal water inlet, outlet or drainage process of the water tank liner 11. For example, assuming that the cross-sectional area of ​​the water inlet pipe 14 is S, and the sum of the cross-sectional areas of the water holes is 0.5S, then when water enters the water tank liner 11 from the water inlet pipe 14 at a certain flow rate, the separator wheel 111 will hinder the water flow, causing the water inlet speed to slow down, and may even cause abnormal changes in the water pressure inside the water tank. If the sum of the cross-sectional areas of the water holes is twice the cross-sectional area of ​​the water inlet pipe 14, the barrier of the separator wheel 111 to the water flow will be small, and the water can smoothly pass through the area where the separator wheel 111 is located, thereby ensuring the cleaning function of the separator wheel 111 without affecting the normal water inlet, outlet and drainage functions of the water tank.

[0065] Furthermore, the water tank inner liner 11 includes a cylindrical section 116 and arcuate sections 117 arranged at both ends of the cylindrical section 116; a first limiting structure 112 is provided at the top of the cylindrical section 116, and the first limiting structure 112 is sleeved on the transmission member 114 and fixedly connected to the transmission member 114, and the first limiting structure 112 rotates with the transmission of the transmission member 114.

[0066] Furthermore, a fixing member 118 is also provided in the water tank liner 11, and the fixing member 118 is fixedly arranged at the bottom of the water tank liner 11. A second limiting structure 113 is provided at the bottom end of the cylindrical section 116 and fixedly arranged on the fixing member 118. A through hole matching the transmission member 114 is provided on the second limiting structure 113, and the transmission member 114 is arranged in the through hole and abuts against the inner wall of the through hole. The through hole on the second limiting structure 113 is used to prevent the radial displacement of the transmission member 114 when it rotates, so that the rotational movement of the transmission member 114 is more stable, and it is ensured that the spoiler separation wheel 111 can better move along the axial direction of the transmission member 114.

[0067] Furthermore, the transmission member 114 includes a transmission screw, which is connected to the driving assembly 12 , and the separating wheel 111 is threadedly sleeved on the transmission screw and moves axially along the transmission screw.

[0068] According to an embodiment of the present invention, on the one hand, Figure 1 As shown, a control method for a heat pump water heater is provided, comprising the following steps:

[0069] Step S100, when the water temperature in the water tank inner tank meets the target temperature and the heat pump water heater is in a water-using state, obtaining the water consumption of the heat pump water heater;

[0070] Step S200, determining the movement speed of the partition wheel 111 based on the water consumption of the heat pump water heater;

[0071] Step S300 , based on the movement speed of the separation wheel 111 , control the separation wheel 111 to move along the axial direction of the water tank inner liner 11 toward the water outlet pipe 13 .

[0072] In this embodiment, when the water temperature in the water tank inner tank 11 of the heat pump water heater meets the target temperature and is in a water-using state, the water consumption of the heat pump water heater is calculated according to the water flow sensor installed on the water pipe; after the water consumption of the heat pump water heater is obtained, the movement speed of the dividing wheel 111 is determined according to the water consumption; further according to the determined movement speed, the dividing wheel 111 is controlled to move along the axial direction of the water tank inner tank 11 toward the water outlet pipe 13, so that the hot water between the dividing wheel 111 and the water outlet pipe 13 can continue to flow from the water outlet pipe 13 to the water-using end, while ensuring that the water supply temperature between the dividing wheel 111 and the water outlet pipe 13 meets the user's needs, thereby ensuring that the actual water outlet temperature is always close to the user's preset water outlet temperature, thereby improving the hot water output rate and the water use comfort.

[0073] like Figure 3 , Figure 4 As shown, in one embodiment, step S200 includes the following steps:

[0074] Step S210: in response to the water consumption being less than a first preset water consumption, maintaining the separation wheel 111 at an initial position;

[0075] Step S220, in response to the water consumption being between the first preset water consumption and the second preset water consumption, determining that the movement speed of the partition wheel 111 is the first target speed, and the second preset water consumption is greater than the first preset water consumption;

[0076] Step S230: in response to the water consumption being greater than or equal to the second preset water consumption, determining the movement speed of the partition wheel 111 to be a second target speed, the second target speed being less than the first target speed.

[0077] In this embodiment, the initial position can be at the second limiting structure 113. By dividing the water tank inner tank 11 into multiple water storage areas, namely the first water storage area L1, the second water storage area L2 and the third water storage area L3, each water storage area corresponds to a fixed water storage capacity; the water storage capacity of the water storage area is determined according to the specifications of the heat pump water heater. When the heat pump water heater is manufactured, the water storage capacity of the first water storage area L1, the second water storage area L2 and the third water storage area L3 is fixed. Among them, the first water storage area L1 is the area between the upper end of the second limiting structure 113 and the bottom of the water tank inner tank 11; the second water storage area L2 is the area between the upper end of the second limiting structure 113 and the lower end of the first limiting structure 112; the third water storage area L3 is the area between the lower end of the first limiting structure 112 and the top of the water tank inner tank 11.

[0078] When the actual water consumption is less than the first preset water consumption, the user's water demand is small, the hot water in the water tank liner 11 can supply the user's water demand, and can ensure that the water outlet temperature meets the user's preset water outlet temperature, so the control separation wheel 111 is kept in the initial position, so that when the user continues to use water, the separation wheel 111 can respond quickly. When the actual water consumption is between the first preset water consumption and the second preset water consumption, that is, the actual water consumption meets the first preset water consumption, but does not reach the second preset water consumption, the movement speed of the separation wheel 111 is determined to be the first target speed, and the separation wheel 111 is controlled to move at the first target speed. Among them, the first target speed can be obtained according to calculation.

[0079] Taking the total capacity of the water tank liner 11 as 200L as an example, the water storage capacity of the first water storage area L1 can be 20L, the water storage capacity of the second water storage area L2 can be 160L, and the water storage capacity of the third water storage area L3 can be 20L; the first preset water consumption can be the water storage capacity that the first water storage area L1 can accommodate, that is, 20L; the second preset water consumption can be 100L. When the actual water consumption reaches 20L, the first target speed is calculated, and the partition wheel 111 is controlled to move at the first target speed.

[0080] When the water consumption is greater than or equal to the second preset water consumption, that is, the actual water consumption meets the second preset water consumption, the movement speed of the dividing wheel 111 is determined to be the second target speed, and the dividing wheel 111 is controlled to move at the second target speed. Among them, the second target speed can be the minimum operating speed of the stepper motor. When the water consumption is large, if the movement speed of the dividing wheel 111 is too fast, it may disturb the water flow in the water tank liner 11, accelerate the mixing between the hot water on the upper side of the dividing wheel 111 and the cold water on the lower side, and quickly reduce the actual water supply temperature in the water tank liner 11, thereby reducing the time the user uses hot water. According to different water consumption, it is determined that the dividing wheel 111 moves in the direction close to the water outlet pipe 13 at the first target speed or the second target speed, so as to further ensure the hot water output rate when the user continues to use hot water, extend the time the user uses hot water, and thus improve the water use comfort.

[0081] like Figure 5 As shown, in one embodiment, step S220 includes the following steps:

[0082] Step S221, obtaining the flow rate of the heat pump water heater and the operating time of the water flow sensor;

[0083] Step S222, calculate the first target speed based on the flow rate, the operating time of the water flow sensor and the structural parameters of the heat pump water heater; wherein the flow rate includes the water outlet flow rate and the water inlet flow rate, and the water flow sensor includes the water outlet flow sensor and the water inlet flow sensor 141.

[0084] In this embodiment, the water inlet flow rate of the heat pump water heater, that is, the speed at which water flows in the water inlet pipe 14 of the heat pump water heater, is obtained through the water inlet flow sensor 141; and the running time of the water inlet flow sensor 141 during the current water use period is further obtained, and the first target speed is calculated in combination with the structural parameters of the heat pump water heater, and then the dividing wheel 111 is controlled to move at the calculated first target speed, so that the mixing of cold water and hot water in the water tank liner 11 can be effectively reduced to ensure the water supply temperature in the water tank liner 11. Among them, the structural parameters of the heat pump water heater include the cross-sectional area of ​​the water outlet pipe 13 or the water inlet pipe 14, the cross-sectional area of ​​the water tank liner 11, etc. Similarly, the water outlet flow rate of the heat pump water heater, that is, the speed at which water flows in the water outlet pipe 13 of the heat pump water heater, can also be obtained through the water outlet flow sensor, and then the running time of the water outlet flow sensor during the current water use period is obtained, and the first target speed is calculated in combination with the structural parameters of the heat pump water heater.

[0085] Further, the first target speed is calculated using the following formula: V1 = (AV2) / (tS);

[0086] Among them, V1 is the first target speed; A is the cross-sectional area of ​​the water outlet pipe; V2 is the water outlet flow rate; t is the operating time of the water outlet flow sensor; S is the cross-sectional area of ​​the water tank inner tank; or, V1 is the first target speed; A is the cross-sectional area of ​​the water inlet pipe; V2 is the water inlet flow rate; t is the operating time of the water inlet flow sensor; S is the cross-sectional area of ​​the water tank inner tank.

[0087] like Figure 6 As shown, in one embodiment, the target temperature includes a first set target temperature and a second set target temperature; after step S220, it also includes:

[0088] Step S240, controlling the heat pump water heater to enter a heating mode, and detecting the current water temperature in the water tank liner 11 during the heating process;

[0089] Step S250: In response to the current water temperature being lower than the first set target temperature, the partition wheel 111 is controlled to stop moving.

[0090] In this embodiment, when the dividing wheel 111 moves at the second target speed, the amount of hot water used in the water tank liner 11 is relatively large. Since the amount of water in the water tank liner 11 needs to be kept relatively constant, more cold water is introduced into the water tank liner 11 during the use of hot water. At this time, the heat pump water heater is controlled to enter the heating mode, so as to control the condenser in the heat pump water heater to heat the water tank liner 11 and increase the water temperature in the water tank liner 11 to meet the user's hot water use needs. In the process of heating the water tank liner 11, the current water temperature in the water tank liner 11 is detected according to the temperature sensor 115, and the current water temperature is compared with the first set target temperature. Among them, the first set target temperature is the lower limit of the settable temperature of the heat pump water heater, which is determined according to the performance of the heat pump water heater. For example, if the settable temperature of a heat pump water heater is 30℃-60℃, the first set target temperature is 30℃. When the current water temperature is lower than the first set target temperature, the water supply temperature in the water tank 11 is low and cannot meet the user's water demand; at this time, the separation wheel 111 is controlled to stop moving to avoid unnecessary mechanical movement, and at the same time, energy can be saved to a certain extent.

[0091] In one embodiment, after step S250, the method further includes: in response to the current water temperature being greater than or equal to the second set target temperature, controlling the partition wheel 111 to move to the initial position; and the second set target temperature being greater than the first set target temperature.

[0092] In this embodiment, after the control of the separation wheel 111 stops moving, the temperature sensor 115 continues to detect the current water temperature in the water tank liner 11; therefore, when it is detected that the current water temperature is greater than or equal to the second set target temperature, the water supply temperature in the water tank liner 11 meets the user's use requirements; the separation wheel 111 is further controlled to move to the initial position away from the water outlet pipe 13, and the heat pump water heater is controlled to enter the standby state, so that when the user uses hot water again, the separation wheel 111 can move axially from the initial position to the direction close to the water outlet pipe 13 again, so as to ensure the water supply temperature when the user continues to use hot water, and meet the user's use requirements for hot water temperature. Among them, the second set target temperature can be 40℃, 45℃, 50℃, 55℃, 60℃, etc.; it can be determined according to the user's use requirements and the performance of the heat pump water heater, and is not specifically limited.

[0093] like Figure 7 As shown, in one embodiment, before obtaining the water consumption of the heat pump water heater, the following steps are also included:

[0094] Step S110, when the heat pump water heater is in the on state, obtaining the current water temperature in the water tank liner 11;

[0095] Step S120, in response to the current water temperature being lower than the second set target temperature, controlling the heat pump water heater to enter a heating mode;

[0096] Step S130 : In response to the heat pump water heater being in a heating mode, controlling the heat pump water heater to heat the water tank liner 11 .

[0097] In this embodiment, when the heat pump water heater is turned on and in the on state, the current water temperature in the water tank 11 is detected by the temperature sensor 115 installed in the water tank 11. The current water temperature is compared with the preset second set target temperature; if the current water temperature is less than the second set target temperature, the heat pump water heater is controlled to enter the heating mode. When the heat pump water heater enters the heating mode, the controller controls the condenser in the heat pump water heater to heat the water tank 11, thereby increasing the water supply temperature in the water tank 11.

[0098] like Figure 8 As shown, in one embodiment, after step S130, the following steps are further included:

[0099] Step S140, obtaining the current water temperature in the water tank liner 11 after heating the water tank liner 11;

[0100] Step S150: In response to the current water temperature being greater than or equal to the second set target temperature, the heat pump water heater is controlled to exit the heating mode and enter a standby state.

[0101] In this embodiment, after the heat pump water heater is in the heating mode and continues to heat the water tank liner 11, the current water temperature in the water tank liner 11 is obtained according to the temperature sensor 115; it is determined whether the current water temperature in the water tank liner 11 meets the preset second set target temperature. When the current water temperature is greater than or equal to the second set target temperature, the water temperature in the water tank liner 11 has reached the target temperature set by the user. At this time, the heat pump water heater is controlled to exit the heating mode and enter the standby state to avoid energy waste caused by continued heating, and to prevent the water supply temperature from being too high, ensuring the safety of users using hot water. When the heat pump water heater is in the standby state, the heating mode can be restarted at any time according to the change of the water supply temperature in the water tank liner 11 to ensure the continuous supply of hot water.

[0102] In one of the embodiments, the heat pump water heater further comprises a display panel, and the method further comprises: displaying the water supply temperature in the water tank inner tank 11 and the available water supply amount in the water tank inner tank 11 on the display panel.

[0103] In this embodiment, by providing a display panel on the heat pump water heater, the water supply temperature in the water tank inner tank 11 and the available water supply of the hot water in the water tank inner tank 11 can be displayed on the display panel, thereby providing intuitive water supply information for the user, allowing the user to clearly understand the working status of the heat pump water heater; allowing the user to reasonably arrange the use of hot water according to the available water supply of the hot water in the water tank inner tank 11, and avoid the situation where the hot water is insufficient. By simultaneously displaying the water supply temperature and the available water supply on the display panel, the user's experience is improved, allowing the user to use hot water more reasonably.

[0104] Fig. 9 The schematic diagram of the structure of the heat pump water heater provided in the embodiment of the present invention is shown. The specific embodiment of the present invention does not limit the specific implementation of the heat pump water heater.

[0105] like Fig. 9 As shown, the heat pump water heater may include: a processor 502 , a communications interface 504 , a memory 506 , and a communications bus 508 .

[0106] The processor 502, the communication interface 504, and the memory 506 communicate with each other via the communication bus 508. The communication interface 504 is used to communicate with other devices such as a client or other server network elements. The processor 502 is used to execute the program 510, which can specifically execute the relevant steps in the above-mentioned control method embodiment for the heat pump water heater.

[0107] Specifically, the program 510 may include program code including computer executable instructions.

[0108] The processor 502 may be a central processing unit (CPU), or an application-specific integrated circuit (ASIC), or one or more integrated circuits configured to implement the embodiment of the present invention. The one or more processors included in the heat pump water heater may be processors of the same type, such as one or more CPUs; or processors of different types, such as one or more CPUs and one or more ASICs.

[0109] The memory 506 is used to store the program 510. The memory 506 may include a high-speed RAM memory, and may also include a non-volatile memory (non-volatile memory), such as at least one disk memory.

[0110] The program 510 may be specifically called by the processor 502 to enable the heat pump water heater to execute the relevant steps in the above-mentioned control method embodiment for the heat pump water heater.

[0111] It can be understood by those skilled in the art that Fig. 9 The structure shown is only for illustration and does not limit the structure of the above-mentioned device. Fig. 9 More or fewer components as shown, or with Fig. 9 Different configurations shown.

[0112] The embodiment of the present invention also provides a computer-readable storage medium. The method according to the embodiment of the present invention can be implemented in hardware, firmware, or can be implemented as a computer code that can be recorded in a storage medium, or can be implemented as a computer code that is originally stored in a remote storage medium or a non-temporary machine-readable storage medium and will be stored in a local storage medium through a network download, so that the method described herein can be stored in such software processing on a storage medium using a general-purpose computer, a dedicated processor, or programmable or dedicated hardware. Among them, the storage medium can be a magnetic disk, an optical disk, a read-only storage memory, a random access memory, a flash memory, a hard disk or a solid-state hard disk, etc.; further, the storage medium can also include a combination of the above types of memories. It can be understood that a computer, a processor, a microprocessor controller, or programmable hardware includes a storage component that can store or receive software or computer code. When the software or computer code is accessed and executed by a computer, a processor, or hardware, the method shown in the above embodiment is implemented.

[0113] In the specific contents of the above-mentioned specific implementation methods, the various technical features can be combined in any non-contradictory manner. In order to make the description concise, not all possible combinations of the above-mentioned technical features are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0114] The specific contents of the above specific embodiments only express several embodiments of the present invention, and the description is relatively specific and detailed, but it cannot be understood as limiting the scope of the patent of the present invention. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the present invention, which all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be based on the attached claims.

Claims

1. A control method for a heat pump water heater, characterized in that: The heat pump water heater comprises a water tank inner tank, a separation wheel arranged in the water tank inner tank, a water outlet pipe arranged at the top of the water tank inner tank and a water inlet pipe arranged at the bottom of the water tank inner tank, and the separation wheel can move along the axial direction of the water tank inner tank; The method comprises: When the water temperature in the water tank inner tank meets the target temperature and the heat pump water heater is in a water use state, obtaining the water consumption of the heat pump water heater; determining a movement speed of the partition wheel based on a water consumption of the heat pump water heater; Based on the movement speed of the separation wheel, the separation wheel is controlled to move along the axial direction of the water tank inner container toward the direction close to the water outlet pipe.

2. The control method of the heat pump water heater according to claim 1, characterized in that: The step of determining the movement speed of the separation wheel based on the water consumption of the heat pump water heater comprises: In response to the water consumption being less than a first preset water consumption, maintaining the separation wheel at an initial position; In response to the water consumption being between the first preset water consumption and the second preset water consumption, determining the movement speed of the separation wheel to be the first target speed, the second preset water consumption being greater than the first preset water consumption; In response to the water consumption being greater than or equal to the second preset water consumption, the movement speed of the partition wheel is determined to be a second target speed, and the second target speed is less than the first target speed.

3. The control method of the heat pump water heater according to claim 2, characterized in that: The step of determining the moving speed of the separation wheel as the first target speed comprises: Obtaining the flow rate of the heat pump water heater and the operating time of the water flow sensor; The first target speed is calculated based on the flow rate, the operating time of the water flow sensor and the structural parameters of the heat pump water heater; wherein the flow rate includes an outlet flow rate and an inlet flow rate, and the water flow sensor includes an outlet flow sensor and an inlet flow sensor.

4. The control method of the heat pump water heater according to claim 3, characterized in that: The first target speed is calculated using the following formula: V1 = (AV2) / (tS); Among them, V1 is the first target speed; A is the cross-sectional area of ​​the water outlet pipe; V2 is the water outlet flow rate; t is the operating time of the water outlet flow sensor; S is the cross-sectional area of ​​the water tank inner liner; or, V1 is the first target speed; A is the cross-sectional area of ​​the water inlet pipe; V2 is the water inlet flow rate; t is the operating time of the water inlet flow sensor; S is the cross-sectional area of ​​the water tank inner liner.

5. The control method of the heat pump water heater according to claim 2, characterized in that: The target temperature includes a first set target temperature and a second set target temperature; after determining that the movement speed of the partition wheel is the second target speed, the method further includes: Controlling the heat pump water heater to enter a heating mode, and detecting the current water temperature in the water tank during the heating process; In response to the current water temperature being lower than the first set target temperature, the partition wheel is controlled to stop moving.

6. The control method of the heat pump water heater according to claim 5, characterized in that: After controlling the separation wheel to stop moving, the method further comprises: In response to the current water temperature being greater than or equal to the second set target temperature, the partition wheel is controlled to move to the initial position; the second set target temperature is greater than the first set target temperature.

7. The control method of the heat pump water heater according to claim 5, characterized in that: Before obtaining the water consumption of the heat pump water heater, the method further includes: When the heat pump water heater is in the on state, obtaining the current water temperature in the water tank; In response to the current water temperature being lower than the second set target temperature, controlling the heat pump water heater to enter a heating mode; In response to the heat pump water heater being in the heating mode, the heat pump water heater is controlled to heat the water tank.

8. The control method of the heat pump water heater according to claim 7, characterized in that: After controlling the heat pump water heater to heat the water tank liner, the method further includes: Obtaining the current water temperature in the water tank liner after heating the water tank liner; In response to the current water temperature being greater than or equal to the second set target temperature, the heat pump water heater is controlled to exit the heating mode and enter a standby state.

9. The control method of the heat pump water heater according to claim 1, characterized in that: The heat pump water heater further includes a display panel, and the method further includes: The display panel displays the current water temperature in the water tank inner tank and the available water supply in the water tank inner tank.

10. A heat pump water heater, characterized in that: include: A memory, a processor, a communication interface and a communication bus, wherein the processor, the memory and the communication interface communicate with each other via the communication bus; The memory is used to store at least one executable instruction, and the executable instruction enables the processor to execute the control method of the heat pump water heater according to any one of claims 1 to 9.

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