WO2018082115A1 - 热泵热水机组及其的控制方法和装置 - Google Patents

热泵热水机组及其的控制方法和装置 Download PDF

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Publication number
WO2018082115A1
WO2018082115A1 PCT/CN2016/105771 CN2016105771W WO2018082115A1 WO 2018082115 A1 WO2018082115 A1 WO 2018082115A1 CN 2016105771 W CN2016105771 W CN 2016105771W WO 2018082115 A1 WO2018082115 A1 WO 2018082115A1
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Prior art keywords
temperature
heat pump
time
water
water tank
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PCT/CN2016/105771
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English (en)
French (fr)
Inventor
张登科
Original Assignee
广东美的暖通设备有限公司
美的集团股份有限公司
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Priority to EP16920873.3A priority Critical patent/EP3537059B1/en
Publication of WO2018082115A1 publication Critical patent/WO2018082115A1/zh

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H4/00—Fluid heaters characterised by the use of heat pumps
    • F24H4/02—Water heaters
    • F24H4/04—Storage heaters
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H9/00—Details
    • F24H9/20—Arrangement or mounting of control or safety devices
    • F24H9/2007—Arrangement or mounting of control or safety devices for water heaters
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H15/00—Control of fluid heaters
    • F24H15/10—Control of fluid heaters characterised by the purpose of the control
    • F24H15/174—Supplying heated water with desired temperature or desired range of temperature
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H15/00—Control of fluid heaters
    • F24H15/20—Control of fluid heaters characterised by control inputs
    • F24H15/212—Temperature of the water
    • F24H15/223—Temperature of the water in the water storage tank
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H15/00—Control of fluid heaters
    • F24H15/30—Control of fluid heaters characterised by control outputs; characterised by the components to be controlled
    • F24H15/355—Control of heat-generating means in heaters
    • F24H15/37—Control of heat-generating means in heaters of electric heaters
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H15/00—Control of fluid heaters
    • F24H15/30—Control of fluid heaters characterised by control outputs; characterised by the components to be controlled
    • F24H15/375—Control of heat pumps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H9/00—Details
    • F24H9/20—Arrangement or mounting of control or safety devices
    • F24H9/2007—Arrangement or mounting of control or safety devices for water heaters
    • F24H9/2014—Arrangement or mounting of control or safety devices for water heaters using electrical energy supply
    • F24H9/2021—Storage heaters
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H15/00—Control of fluid heaters
    • F24H15/10—Control of fluid heaters characterised by the purpose of the control
    • F24H15/176—Improving or maintaining comfort of users

Definitions

  • the invention relates to the technical field of household appliances, in particular to a control method of a heat pump hot water unit, a control device of a heat pump hot water unit and a heat pump hot water unit having the same.
  • the opening of the electric auxiliary heater is controlled according to the preset water temperature, that is, when the water temperature of the heat pump hot water unit reaches the preset water temperature, the electric auxiliary heater is controlled to be turned on, and the water temperature of the heat pump hot water unit reaches the set temperature.
  • the electric auxiliary heater is turned off.
  • the heating capacity of the heat pump main unit may change after running for a period of time, and the operating temperature may change during the operation, a simple calculation may cause a large deviation, thereby causing the electric auxiliary heater to be turned on earlier, resulting in consumption.
  • the increase can also cause the electric auxiliary heater to be delayed, so that the water temperature of the heat pump hot water unit cannot reach the set temperature.
  • the present invention aims to solve at least one of the technical problems in the related art to some extent.
  • an object of the present invention is to provide a control method for a heat pump hot water unit, which controls electric assistance by time required for each time the water tank rises at a preset temperature when the heat pump main unit and the electric auxiliary heater are simultaneously turned on according to real-time calculation.
  • the opening of the heater not only achieves the purpose of energy saving, but also satisfies the user's demand for water temperature.
  • Another object of the present invention is to provide a control device for a heat pump hot water unit.
  • Still another object of the present invention is to provide a heat pump hot water unit.
  • an embodiment of the present invention provides a control method of a heat pump hot water unit including a heat pump main unit, an electric auxiliary heater, and a water tank, and the control method includes the following steps: receiving After the electric signal is obtained, the water temperature of the water tank is obtained, and it is determined whether the water temperature of the water tank is less than a set temperature; if the water temperature is less than the set temperature, the heat pump main unit is controlled to be in an open state; Calculating, for a preset time, a time required for the water temperature of the water tank to increase the first preset temperature when the heat pump main body and the electric auxiliary heater are simultaneously turned on, and recording the first time; determining whether the first time is Less than the second preset time; and if the first time is less than the second preset time, controlling the electric auxiliary heater to be in an on state.
  • the control method of the heat pump water heater After receiving the valley electric signal, the water temperature of the water tank is obtained. If the water temperature of the water tank is less than the preset temperature, the control heat pump main body is turned on, and the water temperature of the water tank is required to increase the first preset temperature when the heat pump main unit and the electric auxiliary heater are simultaneously turned on every first preset time. The time is recorded as the first time, and if the first time is less than the second preset time, the electric auxiliary heater is controlled to be in an open state.
  • the method controls the opening of the electric auxiliary heater by the time required for the water tank to raise the preset temperature when the heat pump main unit and the electric auxiliary heater are simultaneously turned on according to the real-time calculation, thereby not only achieving the purpose of energy saving but also satisfying the user.
  • the need for water temperature is not only achieving the purpose of energy saving but also satisfying the user.
  • the time required for the water temperature of the water tank to increase the first preset temperature when the heat pump main body and the electric auxiliary heater are simultaneously turned on is calculated every other first preset time.
  • the method includes: determining whether the set temperature is less than a maximum heating temperature of the heat pump host at a current outdoor ambient temperature; if the set temperature is less than a maximum heating temperature of the heat pump host at the current outdoor ambient temperature, Calculating the total time of the remaining valley electricity for the first preset time, and calculating the first time according to the total time of the remaining valley electricity, the set temperature, and the water temperature of the water tank; if the set temperature is greater than or equal to The maximum heating temperature of the heat pump main body at the current outdoor ambient temperature, according to the time required for the water temperature of the water tank to increase the first preset temperature when the electric auxiliary heater is separately turned on, the first Calculating a total time of remaining valley electricity according to a preset time, and according to the total time of the remaining valley electricity, the maximum heating temperature of the heat pump host
  • the first time is calculated by the following formula:
  • t is the first time
  • H is the total time of the valley electricity
  • TM is the first preset time
  • n is the calculated number of times
  • TS is the set temperature
  • T5 is the water temperature of the water tank.
  • the first time is calculated by the following formula:
  • t is the first time
  • H is the total time of the valley electricity
  • t de is the time required for the water temperature of the water tank to increase the first preset temperature when the electric auxiliary heater is turned on separately
  • TS For the set temperature
  • Tstop is the highest heating temperature of the heat pump host at the current outdoor ambient temperature
  • n is the calculated number of times
  • TM is the first preset time
  • T5 is the water temperature of the water tank.
  • the second preset time is required for each time the water temperature of the water tank is raised by the first preset temperature when the heat pump main body and the electric auxiliary heater are simultaneously turned on at the current outdoor ambient temperature. The minimum time.
  • the method further includes: If the set temperature is less than the highest heating temperature of the heat pump main body at the current outdoor ambient temperature, controlling the heat pump main unit and the electric auxiliary heater when the water temperature of the water tank is greater than or equal to the set temperature Simultaneously in a closed state; if the set temperature is greater than or equal to a maximum heating temperature of the heat pump host at the current outdoor ambient temperature, the water temperature of the water tank is greater than or equal to the current outdoor ambient temperature of the heat pump host The heat pump main body is controlled to be in a closed state at a maximum heating temperature, and the electric auxiliary heater is controlled to be in a closed state when a water temperature of the water tank is greater than or equal to the set temperature.
  • another embodiment of the present invention provides a control device for a heat pump hot water unit, which includes a heat pump main unit, an electric auxiliary heater, and a water tank, and the control device includes: a temperature acquisition module And a control module, wherein the control module is respectively connected to the temperature acquisition module, the heat pump host and the electric auxiliary heater, and the control module is configured to receive a valley electric signal
  • the control module controls the heat pump host to be in an open state, and calculates the first preset time
  • the control module controls the electric auxiliary heater to be in an open state.
  • the control module determines whether the water temperature of the water tank is less than the set temperature. If the water temperature is lower than the set temperature, the control module controls the heat pump main unit to be in an open state, and calculates the required water temperature of the water tank every time the first preset temperature is raised when the heat pump main unit and the electric auxiliary heater are simultaneously turned on every other preset time. The time is recorded as the first time. If the first time is less than the second preset time, the control module controls the electric auxiliary heater to be in an open state.
  • the device controls the opening of the electric auxiliary heater by the time required for the water tank to raise the preset temperature when the heat pump main unit and the electric auxiliary heater are simultaneously turned on according to the real-time calculation, thereby not only achieving the purpose of energy saving but also satisfying the user.
  • the need for water temperature is not only achieving the purpose of energy saving but also satisfying the user.
  • the control module calculates, every first preset time, that the water temperature of the water tank is required to increase the first preset temperature when the heat pump main unit and the electric auxiliary heater are simultaneously turned on. Time, wherein the control module determines whether the set temperature is less than a maximum heating temperature of the heat pump host at a current outdoor ambient temperature; if the set temperature is less than the current outdoor ambient temperature of the heat pump host The maximum heating temperature, the control module calculates the total remaining grid power time according to the first preset time, and calculates the first according to the remaining total valley electricity time, the set temperature, and the water temperature of the water tank a time; if the set temperature is greater than or equal to the highest heating temperature of the heat pump main body at the current outdoor ambient temperature, the control module increases the water temperature of the water tank according to the electric auxiliary heater when the battery is separately turned on.
  • the pump maximum heating temperature of the host, the tank temperature is calculated at a first time outside the ambient temperature.
  • the control module calculates the first time by the following formula:
  • t is the first time
  • H is the total time of the valley electricity
  • TM is the first preset time
  • n is the calculated number of times
  • TS is the set temperature
  • T5 is the water temperature of the water tank.
  • the control module calculates the first time by the following formula:
  • t is the first time
  • H is the total time of the valley electricity
  • t de is the time required for the water temperature of the water tank to increase the first preset temperature when the electric auxiliary heater is turned on separately
  • TS For the set temperature
  • Tstop is the highest heating temperature of the heat pump host at the current outdoor ambient temperature
  • n is the calculated number of times
  • TM is the first preset time
  • T5 is the water temperature of the water tank.
  • the second preset time is required for each time the water temperature of the water tank is raised by the first preset temperature when the heat pump main body and the electric auxiliary heater are simultaneously turned on at the current outdoor ambient temperature. The minimum time.
  • the control module after controlling the electric auxiliary heater to be in an on state, if the set temperature is lower than a maximum heating temperature of the heat pump host at the current outdoor ambient temperature, the control module is Controlling the heat pump main body and the electric auxiliary heater to be in a closed state when the water temperature of the water tank is greater than or equal to the set temperature; if the set temperature is greater than or equal to the current outdoor ambient temperature, the heat pump main body The maximum heating temperature, the control module controls the heat pump main unit to be in a closed state when the water temperature of the water tank is greater than or equal to a maximum heating temperature of the heat pump main body at the current outdoor ambient temperature, and the water temperature in the water tank is greater than The electric auxiliary heater is controlled to be in a closed state when the set temperature is equal to.
  • an embodiment of the present invention also proposes a heat pump hot water unit including the above-described control device of the heat pump water heater unit.
  • the heat pump hot water unit of the embodiment of the present invention controls the opening of the electric auxiliary heater by the above-mentioned control device by the time required for the water tank to raise the preset temperature when the heat pump main unit and the electric auxiliary heater are simultaneously turned on according to the real-time calculation. Therefore, not only can the purpose of energy saving be achieved, but also the user's demand for water temperature can be satisfied.
  • FIG. 1 is a flow chart of a control method of a heat pump water heater according to an embodiment of the present invention
  • FIG. 2 is a schematic diagram showing the relationship between the outdoor ambient temperature and the maximum heating temperature of the heat pump main body according to an embodiment of the present invention
  • FIG. 3 is a logic diagram of a control method of a heat pump water heater according to an embodiment of the present invention.
  • FIG. 4 is a logic diagram of a control method of a heat pump water heater according to another embodiment of the present invention.
  • FIG. 5 is a schematic diagram showing relationship between an outdoor ambient temperature and a second preset time according to an embodiment of the present invention
  • FIG. 6 is a flow chart of a control method of a heat pump water heater according to an embodiment of the present invention.
  • Figure 7 is a schematic view showing the structure of a heat pump water heater according to an embodiment of the present invention.
  • the heat pump hot water unit may include a heat pump main unit, an electric auxiliary heater, and a water tank.
  • control method of the heat pump hot water unit may include the following steps:
  • the set temperature is the water temperature required by the user, and can be manually set according to the hot water capacity of the heat pump hot water unit and the actual needs of the user.
  • the set temperature can be 38 ° C to 75 ° C, and the default value can be 55. °C.
  • control heat pump main unit if the water temperature is lower than the set temperature, the control heat pump main unit is turned on.
  • the first preset time and the first preset temperature may be calibrated according to actual conditions.
  • the first preset time may be 1 min to 10 min
  • the first preset temperature may be 1 ° C to 2 ° C.
  • the time required for the water temperature of the water tank to rise by the first preset temperature when the heat pump main unit and the electric auxiliary heater are simultaneously turned on is calculated every other first time, including: determining whether the set temperature is less than The maximum heating temperature of the heat pump main unit at the current outdoor ambient temperature; if the set temperature is lower than the maximum heating temperature of the heat pump main unit at the current outdoor ambient temperature, the total remaining grid power time is calculated according to the first preset time, and according to the total remaining grid power time Setting the temperature and the water temperature of the water tank to calculate the first time; if the set temperature is greater than or equal to the maximum heating temperature of the heat pump main body at the current outdoor ambient temperature, the water temperature of the water tank is raised according to the first preset when the electric auxiliary heater is turned on separately The time required for the temperature, the first preset time, the total time of the remaining valley electricity is calculated, and the first time is calculated according to the total time of the remaining valley electricity, the maximum heating temperature of the heat pump host at the current outdoor ambient temperature
  • the first time when the set temperature is lower than the highest heating temperature of the heat pump main body at the current outdoor ambient temperature, the first time can be calculated by the following formula (1):
  • H is the total time of the valley electricity
  • the total time H of the valley electricity can be set by the user through the timing, or can be set according to the time provided by the actual power supply bureau, and the value is generally 1 to 8 hours
  • TM For the first preset time
  • n is the number of calculations
  • TS is the set temperature
  • T5 is the water temperature of the water tank.
  • the first time when the set temperature is greater than or equal to the highest heating temperature of the heat pump main body at the current outdoor ambient temperature, the first time can be calculated by the following formula (2):
  • Tstop is the highest heating temperature of the heat pump main body under the current outdoor ambient temperature, that is, under different outdoor environmental temperature T4.
  • the heat pump main body can heat the water in the water tank to the highest temperature, as shown in Figure 2, Tstopg1, Tstopg2, ..., Tstopg13 are the maximum heating temperature of the heat pump main unit under different outdoor ambient temperature T4, for example, when 37 °C ⁇ T4 At ⁇ 43 °C, the maximum heating temperature of the heat pump main unit is Tstopg1.
  • the maximum heating temperature of the heat pump main unit is Tstopg13, when the outdoor ambient temperature T4 is higher than 43 °C or lower than -14 °C.
  • the heat pump main unit does not work.
  • the water temperature T5 of the water tank is obtained in real time through the temperature sensor, and it is determined whether the water temperature T5 of the water tank is less than the set temperature TS (or less than the set temperature TS).
  • the boot hysteresis temperature can be calibrated according to the actual situation, for example, the boot hysteresis temperature can be 1 ° C ⁇ 10 ° C, the default boot hysteresis temperature can be 5 ° C). If the water temperature T5 of the water tank is less than the set temperature TS, the current water temperature cannot meet the user's demand. At this time, the heat pump main unit needs to be controlled to open, that is, the compressor in the heat pump main unit is turned on to heat the water in the water tank.
  • the heat pump main unit After the heat pump main unit is turned on, every time the first preset time TM (such as 5 min) is calculated according to the current heating condition, when the heat pump main unit and the electric auxiliary heater are simultaneously turned on, the water temperature of the water tank rises by a first preset temperature (for example, 1 ° C). The time required is recorded as the first time t.
  • the calculation method of the first time t is also selected according to the relationship between the set temperature TS and the highest heating temperature Tstop of the heat pump host at the current outdoor ambient temperature, so as to ensure the calculation of the first time t. Accuracy.
  • One is to open the heat pump main unit separately for a period of time, then control the electric auxiliary heater and the heat pump main unit to be turned on at the same time, and the other is to open the heat pump main unit separately.
  • the electric auxiliary heater and the heat pump main unit are controlled to be turned on for a while, and finally the electric auxiliary heater is controlled to be turned on for a while. Therefore, in this case, when calculating the first time t, it is also necessary to consider the heating condition when the electric auxiliary heater is separately turned on. For example, the water temperature of the water tank may be raised first according to the temperature of the water heater alone.
  • the second preset time is a minimum time required for the water temperature T5 of the water tank to increase the first preset temperature when the preset heat pump main unit and the electric auxiliary heater are simultaneously turned on.
  • the outdoor ambient temperature T4 has a certain influence on the heating capacity of the heat pump main unit, that is, when the heat pump main unit and the electric auxiliary heater are simultaneously turned on under different outdoor environmental temperatures T4, the water temperature T5 of the water tank is raised by the first preset temperature.
  • the minimum time required is different. Therefore, the minimum time required for the water temperature T5 of the water tank to increase the first preset temperature can be determined according to the current outdoor ambient temperature T4.
  • the second preset time may be a minimum time required for the water temperature of the water tank to rise by the first preset temperature when the heat pump main unit and the electric auxiliary heater are simultaneously turned on at the current outdoor ambient temperature.
  • the outdoor ambient temperature T4 may be partitioned, and the second preset time in each partition is the same, as shown in Table 1:
  • the electric auxiliary heater and the heat pump main unit are simultaneously turned on, and the minimum time required for the T5 to rise by 1 °C 5.4min t hd14e
  • the electric auxiliary heater and the heat pump main unit are simultaneously turned on, and the minimum time required for the T5 to rise by 1 °C 6.0min t hd15e
  • the electric auxiliary heater and the heat pump main unit are simultaneously turned on, and the minimum time required for the T5 to rise by 1 °C 6.4min t de Single-turn electric auxiliary heater, the time required for T5 to rise 1 °C 8.6min
  • t hd1e , t hd1e , ..., t hd15e are respectively in different outdoor ambient temperature regions corresponding to Figure 5, when the electric auxiliary heater and the heat pump main unit are simultaneously turned on, the water temperature T5 of the water tank needs to be increased by 1 ° C.
  • the minimum time that is, the second preset time.
  • the second preset time t hd15e is 6.4 min; when 18 ° C ⁇ T4 ⁇ 21 ° C, the second preset time t hd7e is 3.7 min.
  • the electric auxiliary heater is controlled to be in an open state.
  • the second preset time t hd1e can be obtained according to Table 1 to be 3.1 min.
  • the maximum heating temperature of the heat pump main body can be obtained as Tstopg2.
  • the method further comprises: if the set temperature is lower than a maximum heating temperature of the heat pump main body at the current outdoor ambient temperature, the water temperature in the water tank is greater than or equal to When the temperature is constant, the heat pump main unit and the electric auxiliary heater are simultaneously turned off; if the set temperature is greater than or equal to the maximum heating temperature of the heat pump main unit at the current outdoor ambient temperature, the water temperature of the water tank is greater than or equal to the current outdoor ambient temperature.
  • the heat pump main unit is turned off when the temperature is heated, and the electric auxiliary heater is turned off when the water temperature of the water tank is greater than or equal to the set temperature.
  • control method of the heat pump water heater of the embodiment of the present invention is calculated based on the current heating speed.
  • the accurate opening time of the electric auxiliary heater can not only achieve the purpose of energy saving, but also ensure that the water of the water tank is heated to the set temperature of the user in the total time of the valley electricity to meet the user's demand.
  • FIG. 6 is a flow chart of a control method of a heat pump water heater according to an embodiment of the present invention.
  • the control method of the heat pump hot water unit may include the following steps:
  • step S102 Determine whether T5 ⁇ TS is established. If yes, go to step S103; if no, go back to step S101.
  • step S104 Determine whether TS ⁇ Tstop is established. If yes, go to step S105; if no, go to step S110.
  • step S106 Determine whether t ⁇ t hdie is established, where t hdie is the second preset time under the current outdoor ambient temperature T4. If yes, go to step S107; if no, go back to step S105.
  • step S108 determining whether T5 ⁇ TS is established. If yes, go to step S109; if no, go back to step S107.
  • step S111 determining whether t ⁇ t hdie is established. If yes, go to step S112; if no, go back to step S110.
  • step S113 determining whether T5 ⁇ Tstop is established. If yes, go to step S114; if no, go back to step S112.
  • control heat pump main unit is in a closed state.
  • step S115 determining whether T5 ⁇ TS is established. If yes, go to step S116; if no, go back to step S114.
  • the control method of the heat pump water heater acquires the water temperature of the water tank after receiving the valley electric signal. If the water temperature of the water tank is less than the preset temperature, the control heat pump main body is turned on, and the water temperature of the water tank is required to increase the first preset temperature when the heat pump main unit and the electric auxiliary heater are simultaneously turned on every first preset time. The time is recorded as the first time, and if the first time is less than the second preset time, the electric auxiliary heater is controlled to be in an open state.
  • the method controls the opening of the electric auxiliary heater by the time required for the water tank to raise the preset temperature when the heat pump main unit and the electric auxiliary heater are simultaneously turned on according to the real-time calculation, thereby not only achieving the purpose of energy saving but also satisfying the user.
  • the need for water temperature is not only achieving the purpose of energy saving but also satisfying the user.
  • FIG. 7 is a schematic view showing the structure of a heat pump water heater according to an embodiment of the present invention.
  • the heat pump water heater unit may include a heat pump main unit 10, an electric auxiliary heater 20, and a water tank 30, wherein the electric auxiliary heater 20 may include one or more heating tubes.
  • the control device of the heat pump water heater unit may include a temperature acquisition module 40 and a control module 50. among them,
  • the temperature acquisition module 40 is configured to acquire the water temperature of the water tank 30.
  • the control module 50 is connected to the temperature acquisition module 40, the heat pump main unit 10 and the electric auxiliary heater 20 respectively.
  • the control module 50 is configured to determine whether the water temperature of the water tank 30 is less than the set temperature after receiving the valley electric signal, if the water temperature is less than the set temperature.
  • the temperature control module 50 controls the heat pump main unit 10 to be in an open state, and calculates the time required for the water temperature of the water tank to rise by the first preset temperature when the heat pump main body 10 and the electric auxiliary heater 20 are simultaneously turned on every other preset time. It is recorded as the first time, and it is determined whether the first time is less than the second preset time. If the first time is less than the second preset time, the control module 50 controls the electric auxiliary heater 20 to be in an open state.
  • the control module 50 calculates the time required for the water temperature of the water tank 30 to rise by the first preset temperature when the heat pump main body 10 and the electric auxiliary heater 20 are simultaneously turned on every other preset time, wherein The control module 50 determines whether the set temperature is lower than the highest heating temperature of the heat pump main unit 10 at the current outdoor ambient temperature; if the set temperature is lower than the highest heating temperature of the heat pump main unit 10 at the current outdoor ambient temperature, the control module 50 according to the first preset Calculating the total time of the remaining valley electricity, and calculating the first time according to the total time of the remaining valley electricity, the set temperature, and the water temperature of the water tank 30; if the set temperature is greater than or equal to the highest heating temperature of the heat pump main body 10 at the current outdoor ambient temperature, the control module 50, according to the time required for the water temperature of the water tank 30 to increase the first preset temperature when the electric auxiliary heater 20 is turned on separately, the total preset time of the remaining valley electricity is calculated, and according to the total
  • control module 50 may calculate the first time t by the above formula (1).
  • control module 50 may calculate the first time t by the above formula (2).
  • the second preset time is a minimum time required for the water temperature of the water tank 30 to rise by the first preset temperature when the heat pump main body 10 and the electric auxiliary heater 20 are simultaneously turned on at the current outdoor ambient temperature.
  • the control module 50 sets the water temperature in the water tank 30 to be equal to or greater than When the temperature is constant, the heat pump main unit 10 and the electric auxiliary heater 20 are simultaneously turned off; if the set temperature is greater than or equal to the highest heating temperature of the heat pump main unit 10 at the current outdoor ambient temperature, the control module 50 has a water temperature in the water tank 30 equal to or greater than the current outdoor temperature.
  • the heat pump main unit 10 is controlled to be in a closed state at the highest heating temperature of the heat pump main unit 10 at ambient temperature, and the electric auxiliary heater 20 is controlled to be in a closed state when the water temperature of the water tank 30 is greater than or equal to the set temperature.
  • the control module determines whether the water temperature of the water tank is less than the set temperature. If the water temperature is lower than the set temperature, the control module controls the heat pump main unit to be in an open state, and calculates the water tank when the heat pump main unit and the electric auxiliary heater are simultaneously turned on every first preset time. The time required for the water temperature to increase the first preset temperature is recorded as the first time. If the first time is less than the second preset time, the control module controls the electric auxiliary heater to be in the on state.
  • the device controls the opening of the electric auxiliary heater by the time required for the water tank to raise the preset temperature when the heat pump main unit and the electric auxiliary heater are simultaneously turned on according to the real-time calculation, thereby not only achieving the purpose of energy saving but also satisfying the user.
  • the need for water temperature is not only achieving the purpose of energy saving but also satisfying the user.
  • an embodiment of the present invention also proposes a heat pump hot water unit including the above-described control device of the heat pump water heater unit.
  • the heat pump hot water unit may be a split structure or a monolithic structure, and may be a water circulation unit or a refrigerant circulation unit.
  • the structure of the heat pump hot water unit may be as shown in FIG. 7 , and the specific structure is as follows. No restrictions.
  • the heat pump hot water unit of the embodiment of the present invention controls the opening of the electric auxiliary heater by the above-mentioned control device by the time required for the water tank to raise the preset temperature when the heat pump main unit and the electric auxiliary heater are simultaneously turned on according to the real-time calculation. Therefore, not only can the purpose of energy saving be achieved, but also the user's demand for water temperature can be satisfied.
  • first and second are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated.
  • features defining “first” or “second” may include at least one of the features, either explicitly or implicitly.
  • the meaning of "a plurality” is at least two, such as two, three, etc., unless specifically defined otherwise.
  • the terms “installation”, “connected”, “connected”, “fixed” and the like shall be understood broadly, and may be either a fixed connection or a detachable connection, unless explicitly stated and defined otherwise. , or integrated; can be mechanical or electrical connection; can be directly connected, or indirectly connected through an intermediate medium, can be the internal communication of two elements or the interaction of two elements, unless otherwise specified Limited.
  • the specific meanings of the above terms in the present invention can be understood on a case-by-case basis.
  • the first feature "on” or “under” the second feature may be a direct contact of the first and second features, or the first and second features may be indirectly through an intermediate medium, unless otherwise explicitly stated and defined. contact.
  • the first feature "above”, “above” and “above” the second feature may be that the first feature is directly above or above the second feature, or merely that the first feature level is higher than the second feature.
  • the first feature “below”, “below” and “below” the second feature may be that the first feature is directly below or obliquely below the second feature, or merely that the first feature level is less than the second feature.

Abstract

一种热泵热水机组及其的控制方法和装置，所述方法包括以下步骤：在接收到谷电信号后，获取水箱（30）的水温；如果水温小于设定温度，则控制热泵主机（10）处于开启状态；每隔第一预设时间计算热泵主机（10）和电辅助加热器（20）同时开启时水箱（30）的水温每升高第一预设温度所需要的时间，记为第一时间；如果第一时间小于第二预设时间，则控制电辅助加热器（20）处于开启状态。该方法通过根据实时计算的热泵主机（10）和电辅助加热器（20）同时开启时水箱（30）每升高预设温度所需要的时间来控制电辅助加热器（20）的开启，从而不仅能够达到节能的目的，而且能够满足用户对水温的需求。

Description

热泵热水机组及其的控制方法和装置 技术领域
本发明涉及家用电器技术领域，特别涉及一种热泵热水机组的控制方法、一种热泵热水机组的控制装置以及一种具有该装置的热泵热水机组。
背景技术
峰谷用电中，虽然谷电的价格非常便宜，但是谷电的总时间是有限的。为了能够在有限的时间内，尽可能多的使用热泵主机，同时又能够保证热泵热水机组的水温达到设定温度，需控制电辅助加热器在合适的时间开启。
相关技术中，根据预设水温来控制电辅助加热器的开启，即当热泵热水机组的水温达到预设水温时，控制电辅助加热器开启，并在热泵热水机组的水温达到设定温度时控制电辅助加热器关闭。
但是，由于热泵主机运行一段时间后的加热能力可能会发生变化，而且运行过程中，环境温度也可能发生变化，简单的计算会产生较大的偏差，从而导致电辅助加热器提前开启，使得耗能增加，也可能导致电辅助加热器推迟开启，从而使得热泵热水机组的水温无法达到设定温度。
发明内容
本发明旨在至少在一定程度上解决相关技术中的技术问题之一。
为此，本发明的一个目的在于提出一种热泵热水机组的控制方法，通过根据实时计算的热泵主机和电辅助加热器同时开启时水箱每升高预设温度所需要的时间来控制电辅助加热器的开启，从而不仅能够达到节能的目的，而且能够满足用户对水温的需求。
本发明的另一个目的在于提出一种热泵热水机组的控制装置。
本发明的又一个目的在于提出一种热泵热水机组。
为实现上述目的，本发明一方面实施例提出了一种热泵热水机组的控制方法，所述热泵热水机组包括热泵主机、电辅助加热器和水箱，所述控制方法包括以下步骤：在接收到谷电信号后，获取所述水箱的水温，并判断所述水箱的水温是否小于设定温度；如果所述水温小于所述设定温度，则控制所述热泵主机处于开启状态；每隔第一预设时间计算所述热泵主机和所述电辅助加热器同时开启时所述水箱的水温每升高第一预设温度所需要的时间，记为第一时间；判断所述第一时间是否小于第二预设时间；以及如果所述第一时间小于所述第二预设时间，则控制所述电辅助加热器处于开启状态。
根据本发明实施例的热泵热水机组的控制方法，在接收到谷电信号后，获取水箱的水温。如果水箱的水温小于预设温度，则控制热泵主机处于开启状态，并每隔第一预设时间计算热泵主机和电辅助加热器同时开启时水箱的水温每升高第一预设温度所需要的时间，记为第一时间，如果第一时间小于第二预设时间，则控制电辅助加热器处于开启状态。该方法通过根据实时计算的热泵主机和电辅助加热器同时开启时水箱每升高预设温度所需要的时间来控制电辅助加热器的开启，从而不仅能够达到节能的目的，而且能够满足用户对水温的需求。
根据本发明的一个实施例，所述每隔第一预设时间计算所述热泵主机和所述电辅助加热器同时开启时所述水箱的水温每升高第一预设温度所需要的时间，包括：判断所述设定温度是否小于当前室外环境温度下所述热泵主机的最高加热温度；如果所述设定温度小于所述当前室外环境温度下所述热泵主机的最高加热温度，则根据所述第一预设时间计算剩余谷电总时间，并根据所述剩余谷电总时间、所述设定温度、所述水箱的水温计算所述第一时间；如果所述设定温度大于等于所述当前室外环境温度下所述热泵主机的最高加热温度，则根据单独开启所述电辅助加热器时所述水箱的水温每升高所述第一预设温度所需要的时间、所述第一预设时间计算剩余谷电总时间，并根据所述剩余谷电总时间、所述当前室外环境温度下所述热泵主机的最高加热温度、所述水箱的水温计算所述第一时间。
根据本发明的一个实施例，当所述设定温度小于所述当前室外环境温度下所述热泵主机的最高加热温度时，通过以下公式计算所述第一时间：
t＝(H*60-TM*n)/(TS-T5)，
其中，t为所述第一时间，H为谷电总时间，TM为所述第一预设时间，n为计算的次数，TS为所述设定温度，T5为所述水箱的水温。
根据本发明的另一个实施例，当所述设定温度大于等于所述当前室外环境温度下所述热泵主机的最高加热温度时，通过以下公式计算所述第一时间：
t＝[H*60-tde*(TS-Tstop)-n*TM]/(Tstop-T5)，
其中，t为所述第一时间，H为谷电总时间，tde为单独开启所述电辅助加热器时所述水箱的水温每升高所述第一预设温度所需要的时间，TS为所述设定温度，Tstop为所述当前室外环境温度下所述热泵主机的最高加热温度，n为计算的次数，TM为所述第一预设时间，T5为所述水箱的水温。
根据本发明的一个实施例，所述第二预设时间为当前室外环境温度下所述热泵主机和所述电辅助加热器同时开启时所述水箱的水温每升高第一预设温度所需要的最小时间。
根据本发明的一个实施例，在控制所述电辅助加热器处于开启状态之后，还包括：如 果所述设定温度小于所述当前室外环境温度下所述热泵主机的最高加热温度，则在所述水箱的水温大于等于所述设定温度时控制所述热泵主机和所述电辅助加热器同时处于关闭状态；如果所述设定温度大于等于所述当前室外环境温度下所述热泵主机的最高加热温度，则在所述水箱的水温大于等于所述当前室外环境温度下所述热泵主机的最高加热温度时控制所述热泵主机处于关闭状态，并在所述水箱的水温大于等于所述设定温度时控制所述电辅助加热器处于关闭状态。
为实现上述目的，本发明另一方面实施例提出了一种热泵热水机组的控制装置，所述热泵热水机组包括热泵主机、电辅助加热器和水箱，所述控制装置包括：温度获取模块，用于获取所述水箱的水温；控制模块，所述控制模块分别与所述温度获取模块、所述热泵主机和所述电辅助加热器相连，所述控制模块用于在接收到谷电信号后，判断所述水箱的水温是否小于设定温度，如果所述水温小于所述设定温度，所述控制模块则控制所述热泵主机处于开启状态，并每隔第一预设时间计算所述热泵主机和所述电辅助加热器同时开启时所述水箱的水温每升高第一预设温度所需要的时间，记为第一时间，并判断所述第一时间是否小于第二预设时间，如果所述第一时间小于所述第二预设时间，所述控制模块则控制所述电辅助加热器处于开启状态。
根据本发明实施例的热泵热水机组的控制装置，控制模块在接收到谷电信号后，判断水箱的水温是否小于设定温度。如果水温小于设定温度，控制模块则控制热泵主机处于开启状态，并每隔第一预设时间计算热泵主机和电辅助加热器同时开启时水箱的水温每升高第一预设温度所需要的时间，记为第一时间，如果第一时间小于第二预设时间，控制模块则控制电辅助加热器处于开启状态。该装置通过根据实时计算的热泵主机和电辅助加热器同时开启时水箱每升高预设温度所需要的时间来控制电辅助加热器的开启，从而不仅能够达到节能的目的，而且能够满足用户对水温的需求。
根据本发明的一个实施例，所述控制模块每隔第一预设时间计算所述热泵主机和所述电辅助加热器同时开启时所述水箱的水温每升高第一预设温度所需要的时间时，其中，所述控制模块判断所述设定温度是否小于当前室外环境温度下所述热泵主机的最高加热温度；如果所述设定温度小于所述当前室外环境温度下所述热泵主机的最高加热温度，所述控制模块则根据所述第一预设时间计算剩余谷电总时间，并根据所述剩余谷电总时间、所述设定温度、所述水箱的水温计算所述第一时间；如果所述设定温度大于等于所述当前室外环境温度下所述热泵主机的最高加热温度，所述控制模块则根据单独开启所述电辅助加热器时所述水箱的水温每升高所述第一预设温度所需要的时间、所述第一预设时间计算剩余谷电总时间，并根据所述剩余谷电总时间、所述当前室外环境温度下所述热泵主机的最高加热温度、所述水箱的水温计算所述第一时间。
根据本发明的一个实施例，当所述设定温度小于所述当前室外环境温度下所述热泵主机的最高加热温度时，所述控制模块通过以下公式计算所述第一时间：
t＝(H*60-TM*n)/(TS-T5)，
其中，t为所述第一时间，H为谷电总时间，TM为所述第一预设时间，n为计算的次数，TS为所述设定温度，T5为所述水箱的水温。
根据本发明的另一个实施例，当所述设定温度大于等于所述当前室外环境温度下所述热泵主机的最高加热温度时，所述控制模块通过以下公式计算所述第一时间：
t＝[H*60-tde*(TS-Tstop)-n*TM]/(Tstop-T5)，
其中，t为所述第一时间，H为谷电总时间，tde为单独开启所述电辅助加热器时所述水箱的水温每升高所述第一预设温度所需要的时间，TS为所述设定温度，Tstop为所述当前室外环境温度下所述热泵主机的最高加热温度，n为计算的次数，TM为所述第一预设时间，T5为所述水箱的水温。
根据本发明的一个实施例，所述第二预设时间为当前室外环境温度下所述热泵主机和所述电辅助加热器同时开启时所述水箱的水温每升高第一预设温度所需要的最小时间。
根据本发明的一个实施例，在控制所述电辅助加热器处于开启状态之后，如果所述设定温度小于所述当前室外环境温度下所述热泵主机的最高加热温度，所述控制模块则在所述水箱的水温大于等于所述设定温度时控制所述热泵主机和所述电辅助加热器同时处于关闭状态；如果所述设定温度大于等于所述当前室外环境温度下所述热泵主机的最高加热温度，所述控制模块则在所述水箱的水温大于等于所述当前室外环境温度下所述热泵主机的最高加热温度时控制所述热泵主机处于关闭状态，并在所述水箱的水温大于等于所述设定温度时控制所述电辅助加热器处于关闭状态。
此外，本发明的实施例还提出了一种热泵热水机组，其包括上述的热泵热水机组的控制装置。
本发明实施例的热泵热水机组，通过上述的控制装置，通过根据实时计算的热泵主机和电辅助加热器同时开启时水箱每升高预设温度所需要的时间来控制电辅助加热器的开启，从而不仅能够达到节能的目的，而且能够满足用户对水温的需求。
附图说明
图1是根据本发明实施例的热泵热水机组的控制方法的流程图；
图2是根据本发明一个实施例的室外环境温度与热泵主机的最高加热温度的关系示意图；
图3是根据本发明一个实施例的热泵热水机组的控制方法的逻辑示意图；
图4是根据本发明另一个实施例的热泵热水机组的控制方法的逻辑示意图；
图5是根据本发明一个实施例的室外环境温度与第二预设时间的关系示意图；
图6是根据本发明一个具体实施例的热泵热水机组的控制方法的流程图；以及
图7是根据本发明一个实施例的热泵热水机组的结构示意图。
具体实施方式
下面详细描述本发明的实施例，所述实施例的示例在附图中示出，其中自始至终相同或类似的标号表示相同或类似的元件或具有相同或类似功能的元件。下面通过参考附图描述的实施例是示例性的，旨在用于解释本发明，而不能理解为对本发明的限制。
下面参照附图来描述本发明实施例的热泵热水机组的控制方法、热泵热水机组的控制装置以及具有该装置的热泵热水机组。
图1是根据本发明实施例的热泵热水机组的控制方法的流程图。在本发明的实施例中，热泵热水机组可包括热泵主机、电辅助加热器和水箱。
如图1所示，该热泵热水机组的控制方法可包括以下步骤：
S1，在接收到谷电信号后，获取水箱的水温，并判断水箱的水温是否小于设定温度。其中，设定温度为用户所需水温，具体可根据热泵热水机组的制热水能力和用户实际需求来手动设定，例如，设定温度可以为38℃～75℃，默认值可以为55℃。
S2，如果水温小于设定温度，则控制热泵主机处于开启状态。
S3，每隔第一预设时间计算热泵主机和电辅助加热器同时开启时水箱的水温每升高第一预设温度所需要的时间，记为第一时间。其中，第一预设时间和第一预设温度可根据实际情况进行标定，例如，第一预设时间可以为1min～10min，第一预设温度可以为1℃～2℃。
根据本发明的一个实施例，每隔第一预设时间计算热泵主机和电辅助加热器同时开启时水箱的水温每升高第一预设温度所需要的时间，包括：判断设定温度是否小于当前室外环境温度下热泵主机的最高加热温度；如果设定温度小于当前室外环境温度下热泵主机的最高加热温度，则根据第一预设时间计算剩余谷电总时间，并根据剩余谷电总时间、设定温度、水箱的水温计算第一时间；如果设定温度大于等于当前室外环境温度下热泵主机的最高加热温度，则根据单独开启电辅助加热器时水箱的水温每升高第一预设温度所需要的时间、第一预设时间计算剩余谷电总时间，并根据剩余谷电总时间、当前室外环境温度下热泵主机的最高加热温度、水箱的水温计算第一时间。
根据本发明的一个实施例，当设定温度小于当前室外环境温度下热泵主机的最高加热温度时，可通过下述公式(1)计算第一时间：
t＝(H*60-TM*n)/(TS-T5)              (1)
其中，t为第一时间，H为谷电总时间，谷电总时间H可由用户通过定时设定，也可以根据实际供电局提供的时间进行设定，该值一般为1～8小时，TM为第一预设时间，n为计算的次数，TS为设定温度，T5为水箱的水温。
根据本发明的另一个实施例，当设定温度大于等于当前室外环境温度下热泵主机的最高加热温度时，可通过下述公式(2)计算第一时间：
t＝[H*60-tde*(TS-Tstop)-n*TM]/(Tstop-T5)             (2)
其中，tde为单独开启电辅助加热器时水箱的水温每升高第一预设温度所需要的时间，Tstop为当前室外环境温度下热泵主机的最高加热温度，即不同室外环境温度T4下，热泵主机能够将水箱中的水加热到的最高温度，如图2所示，Tstopg1、Tstopg2、…、Tstopg13分别为不同室外环境温度T4下，热泵主机的最高加热温度，例如，当37℃≤T4＜43℃时，热泵主机的最高加热温度为Tstopg1，当-14℃≤T4＜-10℃时，热泵主机的最高加热温度为Tstopg13，当室外环境温度T4高于43℃或者低于-14℃时，热泵主机不进行工作。
具体而言，如图3和图4所示，在接收到谷电信号后，通过温度传感器实时获取水箱的水温T5，并判断水箱的水温T5是否小于设定温度TS(或者小于设定温度TS-开机回差温度，其中，开机回差温度可根据实际情况进行标定，例如，开机回差温度可以为1℃～10℃，默认开机回差温度可以为5℃)。如果水箱的水温T5小于设定温度TS，则说明当前水温无法满足用户需求，此时需控制热泵主机开启，即控制热泵主机中的压缩机开启，以对水箱中的水进行加热。
在热泵主机开启后，每隔第一预设时间TM(如5min)根据当前加热状况计算一次热泵主机和电辅助加热器同时开启时，水箱的水温升高第一预设温度(如1℃)所需要的时间，记为第一时间t。在计算第一时间t时，还根据设定温度TS与当前室外环境温度下热泵主机的最高加热温度Tstop之间的大小关系来选择第一时间t的计算方式，以保证第一时间t计算的准确度。
如图3所示，当TS＜Tstop时，可能出现两种加热情况，一种是单独开启热泵主机即可在谷电总时间H内将水箱的水加热到设定温度TS，另一种是先单独开启热泵主机一段时间后，再控制电辅助加热器和热泵主机同时开启才能在谷电总时间H内将水箱的水加热到设定温度TS。因此，在计算第一时间t时，可先根据第一预设时间TM计算剩余谷电总时间H＇，例如，剩余谷电总时间H＇＝H*60-n*TM，然后根据剩余谷电总时间H＇、设定温度TS和水箱的水温T5计算第一时间t，例如，第一时间t＝H＇/(TS-T5)＝(H*60-n*TM)/(TS-T5)。
如图4所示，当TS≥Tstop时，不会出现单独开启热泵主机即可在谷电总时间H内将 水箱的水加热到设定温度TS的情况，而且还有可能出现热泵主机和电辅助加热器同时开启时，热泵主机的温度已经达到Tstop，而水箱的水温还未达到设定温度TS，此时需单独开启电辅助加热器继续进行加热以在谷电总时间H内将水箱的水加热到设定温度TS的情况。即言，当TS≥Tstop时，也可能出现两种加热情况，一种是先单独开启热泵主机一段时间后，再控制电辅助加热器和热泵主机同时开启，另一种是先单独开启热泵主机一段时间，然后再控制电辅助加热器和热泵主机同时开启一段时间，最后控制电辅助加热器单独开启一段时间。因此，在该情况下，在计算第一时间t时，还需考虑电辅助加热器单独开启时的加热情况，例如，可先根据单独开启电辅助加热器时水箱的水温每升高第一预设温度所需要的时间tde计算剩余谷电总时间H＇，如，剩余谷电总时间H＇＝H*60-tde*(TS-Tstop)-n*TM，然后，根据剩余谷电总时间H＇、当前室外环境温度下热泵主机的最高加热温度Tstop、水箱的水温T5计算第一时间t，例如，第一时间t＝H＇/(Tstop-T5)＝[H*60-tde*(TS-Tstop)-n*TM]/(Tstop-T5)。
S4，判断第一时间是否小于第二预设时间。
其中，第二预设时间为预先设定的热泵主机和电辅助加热器同时开启时，水箱的水温T5每升高第一预设温度所需要的最小时间。考虑到室外环境温度T4对热泵主机的加热能力会产生一定的影响，即不同室外环境温度T4下，热泵主机和电辅助加热器同时开启时，水箱的水温T5每升高第一预设温度所需要的最小时间是不同的。因此，可根据当前室外环境温度T4来确定水箱的水温T5每升高第一预设温度所需要的最小时间。
即言，根据本发明的一个实施例，第二预设时间可以为当前室外环境温度下热泵主机和电辅助加热器同时开启时水箱的水温每升高第一预设温度所需要的最小时间。
为了简化计算，如图5所示，可以对室外环境温度T4进行分区，并且每个分区内的第二预设时间是相同的，具体如表1所示：
表1
代号 含义 参数值
thd1e 电辅助加热器与热泵主机同时开启，T5上升1℃需要的最小时间 3.1min
thd2e 电辅助加热器与热泵主机同时开启，T5上升1℃需要的最小时间 3.0min
thd3e 电辅助加热器与热泵主机同时开启，T5上升1℃需要的最小时间 3.2min
thd4e 电辅助加热器与热泵主机同时开启，T5上升1℃需要的最小时间 3.4min
thd5e 电辅助加热器与热泵主机同时开启，T5上升1℃需要的最小时间 3.5min
thd6e 电辅助加热器与热泵主机同时开启，T5上升1℃需要的最小时间 3.6min
thd7e 电辅助加热器与热泵主机同时开启，T5上升1℃需要的最小时间 3.7min
thd8e 电辅助加热器与热泵主机同时开启，T5上升1℃需要的最小时间 3.9min
thd9e 电辅助加热器与热泵主机同时开启，T5上升1℃需要的最小时间 4.0min
thd10e 电辅助加热器与热泵主机同时开启，T5上升1℃需要的最小时间 4.2min
thd11e 电辅助加热器与热泵主机同时开启，T5上升1℃需要的最小时间 4.5min
thd12e 电辅助加热器与热泵主机同时开启，T5上升1℃需要的最小时间 4.8min
thd13e 电辅助加热器与热泵主机同时开启，T5上升1℃需要的最小时间 5.4min
thd14e 电辅助加热器与热泵主机同时开启，T5上升1℃需要的最小时间 6.0min
thd15e 电辅助加热器与热泵主机同时开启，T5上升1℃需要的最小时间 6.4min
tde 单开电辅助加热器，T5升1℃需要的时间 8.6min
在表1中，thd1e、thd1e、…、thd15e分别为图5所对应的不同室外环境温度区域内，电辅助加热器和热泵主机同时开启时，水箱的水温T5每升高1℃需要的最小时间，即第二预设时间。例如，当室外环境温度T4＜-3℃时，第二预设时间thd15e为6.4min；当18℃＜T4＜21℃时，第二预设时间thd7e为3.7min。
S5，如果第一时间小于第二预设时间，则控制电辅助加热器处于开启状态。
具体而言，假设当前室外环境温度T4处于35℃～37℃之间，则根据表1可以获得第二预设时间thd1e为3.1min，根据图2可以获得热泵主机的最高加热温度为Tstopg2。并且，假设当前计算的次数n＝10，那么当TS＜Tstopg2时，通过上述公式(1)可计算出第一时间t＝(H*60-TM*10)/(TS-T5)，然后判断第一时间t是否小于第二预设时间thd1e，如果第一时间t小于第二预设时间thd1e，则控制电辅助加热器处于开启状态，此时热泵主机和电辅助加热器同时对水箱的水进行加热；当TS≥Tstopg2时，通过上述公式(2)可计算出第一时间t＝[H*60-tde*(TS-Tstopg2)-10*TM]/(Tstopg2-T5)，然后判断第一时间t是否小于第二预设时间thd1e，如果第一时间t小于第二预设时间thd1e，则控制电辅助加热器处于开启状态，此时热泵主机和电辅助加热器同时对水箱的水进行加热。
进一步地，根据本发明的一个实施例，在控制电辅助加热器处于开启状态之后，还包括：如果设定温度小于当前室外环境温度下热泵主机的最高加热温度，则在水箱的水温大于等于设定温度时控制热泵主机和电辅助加热器同时处于关闭状态；如果设定温度大于等于当前室外环境温度下热泵主机的最高加热温度，则在水箱的水温大于等于当前室外环境温度下热泵主机的最高加热温度时控制热泵主机处于关闭状态，并在水箱的水温大于等于设定温度时控制电辅助加热器处于关闭状态。
具体而言，如图3所示，当TS＜Tstop时，在热泵主机和电辅助加热器同时开启以对水箱的水进行加热的过程中，当水箱的水温T5大于等于设定温度TS时，即可控制热泵主机和电辅助加热器同时处于关闭状态；如图4所示，当TS≥Tstop时，在热泵主机和电辅助加热器同时开启以对水箱的水进行加热的过程中，如果水箱的水温T5大于等于当前室外环境温度下热泵主机的最高加热温度Tstop，则控制热泵主机处于关闭状态，即当时间达到H*60-(TS-Tstop)*tde时，控制热泵主机处于关闭状态，然后，电辅助加热器单独对水箱的水进行加热，直至水箱的水温T5大于等于设定温度TS时，控制电辅助加热器处于关闭状态。
因此，本发明实施例的热泵热水机组的控制方法，通过根据当前的加热速度来推算出 电辅助加热器的准确开启时间，从而不仅能够达到节能的目的，而且能够保证谷电总时间内将水箱的水加热至用户的设定温度，满足用户需求。
为使本领域技术人员更清楚地了解本发明，图6是根据本发明一个具体实施例的热泵热水机组的控制方法的流程图。如图6所示，该热泵热水机组的控制方法可包括以下步骤：
S101，在接收到谷电信号后，获取水箱的水温T5。
S102，判断T5＜TS是否成立。如果是，执行步骤S103；如果否，返回步骤S101。
S103，控制热泵主机处于开启状态。
S104，判断TS＜Tstop是否成立。如果是，执行步骤S105；如果否，执行步骤S110。
S105，计算第一时间t＝(H*60-TM*n)/(TS-T5)。
S106，判断t＜thdie是否成立，其中，thdie为当前室外环境温度T4下的第二预设时间。如果是，执行步骤S107；如果否，返回步骤S105。
S107，控制电辅助加热器处于开启状态。
S108，判断T5≥TS是否成立。如果是，执行步骤S109；如果否，返回步骤S107。
S109，控制热泵主机和电辅助加热器同时处于关闭状态。
S110，计算第一时间t＝[H*60-tde*(TS-Tstop)-n*TM]/(Tstop-T5)。
S111，判断t＜thdie是否成立。如果是，执行步骤S112,；如果否，返回步骤S110。
S112，控制电辅助加热器处于开启状态。
S113，判断T5≥Tstop是否成立。如果是，执行步骤S114；如果否，返回步骤S112。
S114，控制热泵主机处于关闭状态。
S115，判断T5≥TS是否成立。如果是，执行步骤S116；如果否，返回步骤S114。
S116，控制电辅助加热器处于关闭状态。
综上所述，根据本发明实施例的热泵热水机组的控制方法，在接收到谷电信号后，获取水箱的水温。如果水箱的水温小于预设温度，则控制热泵主机处于开启状态，并每隔第一预设时间计算热泵主机和电辅助加热器同时开启时水箱的水温每升高第一预设温度所需要的时间，记为第一时间，如果第一时间小于第二预设时间，则控制电辅助加热器处于开启状态。该方法通过根据实时计算的热泵主机和电辅助加热器同时开启时水箱每升高预设温度所需要的时间来控制电辅助加热器的开启，从而不仅能够达到节能的目的，而且能够满足用户对水温的需求。
图7是根据本发明一个实施例的热泵热水机组的结构示意图。如图7所示，该热泵热水机组可包括热泵主机10、电辅助加热器20和水箱30，其中，电辅助加热器20可以包括一个或多个加热管。
如图7所示，该热泵热水机组的控制装置可包括温度获取模块40和控制模块50。其中， 温度获取模块40用于获取水箱30的水温。控制模块50分别与温度获取模块40、热泵主机10和电辅助加热器20相连，控制模块50用于在接收到谷电信号后，判断水箱30的水温是否小于设定温度，如果水温小于设定温度，控制模块50则控制热泵主机10处于开启状态，并每隔第一预设时间计算热泵主机10和电辅助加热器20同时开启时水箱的水温每升高第一预设温度所需要的时间，记为第一时间，并判断第一时间是否小于第二预设时间，如果第一时间小于第二预设时间，控制模块50则控制电辅助加热器20处于开启状态。
根据本发明的一个实施例，控制模块50每隔第一预设时间计算热泵主机10和电辅助加热器20同时开启时水箱30的水温每升高第一预设温度所需要的时间时，其中，控制模块50判断设定温度是否小于当前室外环境温度下热泵主机10的最高加热温度；如果设定温度小于当前室外环境温度下热泵主机10的最高加热温度，控制模块50则根据第一预设时间计算剩余谷电总时间，并根据剩余谷电总时间、设定温度、水箱30的水温计算第一时间；如果设定温度大于等于当前室外环境温度下热泵主机10的最高加热温度，控制模块50则根据单独开启电辅助加热器20时水箱30的水温每升高第一预设温度所需要的时间、第一预设时间计算剩余谷电总时间，并根据剩余谷电总时间、当前室外环境温度下热泵主机10的最高加热温度、水箱30的水温计算第一时间。
根据本发明的一个实施例，当设定温度小于当前室外环境温度下热泵主机10的最高加热温度时，控制模块50可通过上述公式(1)计算第一时间t。
根据本发明的另一个实施例，当设定温度大于等于当前室外环境温度下热泵主机10的最高加热温度时，控制模块50可通过上述公式(2)计算第一时间t。
根据本发明的一个实施例，第二预设时间为当前室外环境温度下热泵主机10和电辅助加热器20同时开启时水箱30的水温每升高第一预设温度所需要的最小时间。
根据本发明的一个实施例，在控制电辅助加热器20处于开启状态之后，如果设定温度小于当前室外环境温度下热泵主机10的最高加热温度，控制模块50则在水箱30的水温大于等于设定温度时控制热泵主机10和电辅助加热器20同时处于关闭状态；如果设定温度大于等于当前室外环境温度下热泵主机10的最高加热温度，控制模块50则在水箱30的水温大于等于当前室外环境温度下热泵主机10的最高加热温度时控制热泵主机10处于关闭状态，并在水箱30的水温大于等于设定温度时控制电辅助加热器20处于关闭状态。
需要说明的是，本公开的热泵热水机组的控制装置中未披露的细节，请参照本公开热泵热水机组的控制方法中所披露的细节，具体这里不再赘述。
综上所述，根据本发明实施例的热泵热水机组的控制装置，控制模块在接收到谷电信号后，判断水箱的水温是否小于设定温度。如果水温小于设定温度，控制模块则控制热泵主机处于开启状态，并每隔第一预设时间计算热泵主机和电辅助加热器同时开启时水箱的 水温每升高第一预设温度所需要的时间，记为第一时间，如果第一时间小于第二预设时间，控制模块则控制电辅助加热器处于开启状态。该装置通过根据实时计算的热泵主机和电辅助加热器同时开启时水箱每升高预设温度所需要的时间来控制电辅助加热器的开启，从而不仅能够达到节能的目的，而且能够满足用户对水温的需求。
此外，本发明的实施例还提出了一种热泵热水机组，其包括上述的热泵热水机组的控制装置。其中，热泵热水机组可以是分体式结构，也可以是整体式结构，可以是水循环机组，也可以是制冷剂循环机组，例如，热泵热水机组的结构可如图7所示，具体结构这里不做限制。
本发明实施例的热泵热水机组，通过上述的控制装置，通过根据实时计算的热泵主机和电辅助加热器同时开启时水箱每升高预设温度所需要的时间来控制电辅助加热器的开启，从而不仅能够达到节能的目的，而且能够满足用户对水温的需求。
在本发明的描述中，需要理解的是，术语“中心”、“纵向”、“横向”、“长度”、“宽度”、“厚度”、“上”、“下”、“前”、“后”、“左”、“右”、“竖直”、“水平”、“顶”、“底”“内”、“外”、“顺时针”、“逆时针”、“轴向”、“径向”、“周向”等指示的方位或位置关系为基于附图所示的方位或位置关系，仅是为了便于描述本发明和简化描述，而不是指示或暗示所指的装置或元件必须具有特定的方位、以特定的方位构造和操作，因此不能理解为对本发明的限制。
此外，术语“第一”、“第二”仅用于描述目的，而不能理解为指示或暗示相对重要性或者隐含指明所指示的技术特征的数量。由此，限定有“第一”、“第二”的特征可以明示或者隐含地包括至少一个该特征。在本发明的描述中，“多个”的含义是至少两个，例如两个，三个等，除非另有明确具体的限定。
在本发明中，除非另有明确的规定和限定，术语“安装”、“相连”、“连接”、“固定”等术语应做广义理解，例如，可以是固定连接，也可以是可拆卸连接，或成一体；可以是机械连接，也可以是电连接；可以是直接相连，也可以通过中间媒介间接相连，可以是两个元件内部的连通或两个元件的相互作用关系，除非另有明确的限定。对于本领域的普通技术人员而言，可以根据具体情况理解上述术语在本发明中的具体含义。
在本发明中，除非另有明确的规定和限定，第一特征在第二特征“上”或“下”可以是第一和第二特征直接接触，或第一和第二特征通过中间媒介间接接触。而且，第一特征在第二特征“之上”、“上方”和“上面”可是第一特征在第二特征正上方或斜上方，或仅仅表示第一特征水平高度高于第二特征。第一特征在第二特征“之下”、“下方”和“下面”可以是第一特征在第二特征正下方或斜下方，或仅仅表示第一特征水平高度小于第二特征。
在本说明书的描述中，参考术语“一个实施例”、“一些实施例”、“示例”、“具体示 例”、或“一些示例”等的描述意指结合该实施例或示例描述的具体特征、结构、材料或者特点包含于本发明的至少一个实施例或示例中。在本说明书中，对上述术语的示意性表述不必须针对的是相同的实施例或示例。而且，描述的具体特征、结构、材料或者特点可以在任一个或多个实施例或示例中以合适的方式结合。此外，在不相互矛盾的情况下，本领域的技术人员可以将本说明书中描述的不同实施例或示例以及不同实施例或示例的特征进行结合和组合。
尽管上面已经示出和描述了本发明的实施例，可以理解的是，上述实施例是示例性的，不能理解为对本发明的限制，本领域的普通技术人员在本发明的范围内可以对上述实施例进行变化、修改、替换和变型。

Claims (13)

  1. 一种热泵热水机组的控制方法，其特征在于，所述热泵热水机组包括热泵主机、电辅助加热器和水箱，所述控制方法包括以下步骤：
    在接收到谷电信号后，获取所述水箱的水温，并判断所述水箱的水温是否小于设定温度；
    如果所述水温小于所述设定温度，则控制所述热泵主机处于开启状态；
    每隔第一预设时间计算所述热泵主机和所述电辅助加热器同时开启时所述水箱的水温每升高第一预设温度所需要的时间，记为第一时间；
    判断所述第一时间是否小于第二预设时间；以及
    如果所述第一时间小于所述第二预设时间，则控制所述电辅助加热器处于开启状态。
  2. 如权利要求1所述的热泵热水机组的控制方法，其特征在于，所述每隔第一预设时间计算所述热泵主机和所述电辅助加热器同时开启时所述水箱的水温每升高第一预设温度所需要的时间，包括：
    判断所述设定温度是否小于当前室外环境温度下所述热泵主机的最高加热温度；
    如果所述设定温度小于所述当前室外环境温度下所述热泵主机的最高加热温度，则根据所述第一预设时间计算剩余谷电总时间，并根据所述剩余谷电总时间、所述设定温度、所述水箱的水温计算所述第一时间；
    如果所述设定温度大于等于所述当前室外环境温度下所述热泵主机的最高加热温度，则根据单独开启所述电辅助加热器时所述水箱的水温每升高所述第一预设温度所需要的时间、所述第一预设时间计算剩余谷电总时间，并根据所述剩余谷电总时间、所述当前室外环境温度下所述热泵主机的最高加热温度、所述水箱的水温计算所述第一时间。
  3. 如权利要求2所述的热泵热水机组的控制方法，其特征在于，当所述设定温度小于所述当前室外环境温度下所述热泵主机的最高加热温度时，通过以下公式计算所述第一时间：
    t＝(H*60-TM*n)/(TS-T5)，
    其中，t为所述第一时间，H为谷电总时间，TM为所述第一预设时间，n为计算的次数，TS为所述设定温度，T5为所述水箱的水温。
  4. 如权利要求2所述的热泵热水机组的控制方法，其特征在于，当所述设定温度大于等于所述当前室外环境温度下所述热泵主机的最高加热温度时，通过以下公式计算所述第一时间：
    t＝[H*60-tde*(TS-Tstop)-n*TM]/(Tstop-T5)，
    其中，t为所述第一时间，H为谷电总时间，tde为单独开启所述电辅助加热器时所述水箱的水温每升高所述第一预设温度所需要的时间，TS为所述设定温度，Tstop为所述当前室外环境温度下所述热泵主机的最高加热温度，n为计算的次数，TM为所述第一预设时间，T5为所述水箱的水温。
  5. 如权利要求1-4中任一项所述的热泵热水机组的控制方法，其特征在于，所述第二预设时间为当前室外环境温度下所述热泵主机和所述电辅助加热器同时开启时所述水箱的水温每升高第一预设温度所需要的最小时间。
  6. 如权利要求2-4中任一项所述的热泵热水机组的控制方法，其特征在于，在控制所述电辅助加热器处于开启状态之后，还包括：
    如果所述设定温度小于所述当前室外环境温度下所述热泵主机的最高加热温度，则在所述水箱的水温大于等于所述设定温度时控制所述热泵主机和所述电辅助加热器同时处于关闭状态；
    如果所述设定温度大于等于所述当前室外环境温度下所述热泵主机的最高加热温度，则在所述水箱的水温大于等于所述当前室外环境温度下所述热泵主机的最高加热温度时控制所述热泵主机处于关闭状态，并在所述水箱的水温大于等于所述设定温度时控制所述电辅助加热器处于关闭状态。
  7. 一种热泵热水机组的控制装置，其特征在于，所述热泵热水机组包括热泵主机、电辅助加热器和水箱，所述控制装置包括：
    温度获取模块，用于获取所述水箱的水温；
    控制模块，所述控制模块分别与所述温度获取模块、所述热泵主机和所述电辅助加热器相连，所述控制模块用于在接收到谷电信号后，判断所述水箱的水温是否小于设定温度，如果所述水温小于所述设定温度，所述控制模块则控制所述热泵主机处于开启状态，并每隔第一预设时间计算所述热泵主机和所述电辅助加热器同时开启时所述水箱的水温每升高第一预设温度所需要的时间，记为第一时间，并判断所述第一时间是否小于第二预设时间，如果所述第一时间小于所述第二预设时间，所述控制模块则控制所述电辅助加热器处于开启状态。
  8. 如权利要求7所述的热泵热水机组的控制装置，其特征在于，所述控制模块每隔第一预设时间计算所述热泵主机和所述电辅助加热器同时开启时所述水箱的水温每升高第一预设温度所需要的时间时，其中，
    所述控制模块判断所述设定温度是否小于当前室外环境温度下所述热泵主机的最高加热温度；
    如果所述设定温度小于所述当前室外环境温度下所述热泵主机的最高加热温度，所述 控制模块则根据所述第一预设时间计算剩余谷电总时间，并根据所述剩余谷电总时间、所述设定温度、所述水箱的水温计算所述第一时间；
    如果所述设定温度大于等于所述当前室外环境温度下所述热泵主机的最高加热温度，所述控制模块则根据单独开启所述电辅助加热器时所述水箱的水温每升高所述第一预设温度所需要的时间、所述第一预设时间计算剩余谷电总时间，并根据所述剩余谷电总时间、所述当前室外环境温度下所述热泵主机的最高加热温度、所述水箱的水温计算所述第一时间。
  9. 如权利要求8所述的热泵热水机组的控制装置，其特征在于，当所述设定温度小于所述当前室外环境温度下所述热泵主机的最高加热温度时，所述控制模块通过以下公式计算所述第一时间：
    t＝(H*60-TM*n)/(TS-T5)，
    其中，t为所述第一时间，H为谷电总时间，TM为所述第一预设时间，n为计算的次数，TS为所述设定温度，T5为所述水箱的水温。
  10. 如权利要求8所述的热泵热水机组的控制装置，其特征在于，当所述设定温度大于等于所述当前室外环境温度下所述热泵主机的最高加热温度时，所述控制模块通过以下公式计算所述第一时间：
    t＝[H*60-tde*(TS-Tstop)-n*TM]/(Tstop-T5)，
    其中，t为所述第一时间，H为谷电总时间，tde为单独开启所述电辅助加热器时所述水箱的水温每升高所述第一预设温度所需要的时间，TS为所述设定温度，Tstop为所述当前室外环境温度下所述热泵主机的最高加热温度，n为计算的次数，TM为所述第一预设时间，T5为所述水箱的水温。
  11. 如权利要求7-10中任一项所述的热泵热水机组的控制装置，其特征在于，所述第二预设时间为当前室外环境温度下所述热泵主机和所述电辅助加热器同时开启时所述水箱的水温每升高第一预设温度所需要的最小时间。
  12. 如权利要求8-10中任一项所述的热泵热水机组的控制装置，其特征在于，在控制所述电辅助加热器处于开启状态之后，
    如果所述设定温度小于所述当前室外环境温度下所述热泵主机的最高加热温度，所述控制模块则在所述水箱的水温大于等于所述设定温度时控制所述热泵主机和所述电辅助加热器同时处于关闭状态；
    如果所述设定温度大于等于所述当前室外环境温度下所述热泵主机的最高加热温度，所述控制模块则在所述水箱的水温大于等于所述当前室外环境温度下所述热泵主机的最高 加热温度时控制所述热泵主机处于关闭状态，并在所述水箱的水温大于等于所述设定温度时控制所述电辅助加热器处于关闭状态。
  13. 一种热泵热水机组，其特征在于，包括如权利要求7-12中任一项所述的热泵热水机组的控制装置。
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CN104101106A (zh) * 2014-08-01 2014-10-15 江苏天舒电器有限公司 一种直热式双源热泵热水机及其控制方法
CN105258331A (zh) * 2015-10-30 2016-01-20 广东美的暖通设备有限公司 一种热泵热水机四通阀失效的防冻结控制方法及系统

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