CN113503645A - Method for determining heating time of water heater and water heater - Google Patents
Method for determining heating time of water heater and water heater Download PDFInfo
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- CN113503645A CN113503645A CN202110771445.XA CN202110771445A CN113503645A CN 113503645 A CN113503645 A CN 113503645A CN 202110771445 A CN202110771445 A CN 202110771445A CN 113503645 A CN113503645 A CN 113503645A
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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
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- F24H9/2007—Arrangement or mounting of control or safety devices for water heaters
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Abstract
The embodiment of the invention discloses a method for determining the heating time of a water heater and the water heater, wherein the method for determining the heating time of the water heater comprises the following steps: acquiring a refrigerating capacity rated parameter, an input power rated parameter, an evaporation temperature and a condensation temperature of a unit of a water heater, and an inlet water temperature, a preset upper limit temperature and a water quality of a water tank of the water heater when the water heater starts to heat; determining the unit heating capacity of the water heater according to the refrigerating capacity rated parameter, the input power rated parameter, the evaporation temperature and the condensation temperature of a compressor in the unit; determining the heating quantity required by the water heater to heat to a preset target temperature according to the water inlet temperature of the water tank, the preset upper limit temperature and the water quality of the water tank; and determining the ratio of the required heating capacity to the unit heating capacity according to the unit heating capacity and the required heating capacity, and taking the ratio as the heating time of the water heater. The method for determining the heating time of the water heater and the water heater provided by the embodiment of the invention can improve the reliability of determining the heating time of the water heater.
Description
Technical Field
The embodiment of the invention relates to a water heater technology, in particular to a method for determining heating time of a water heater and the water heater.
Background
In the heat pump water heater, the application of the water heater such as the heat pump water heater is more and more extensive, because when the water heater heats, a user can only see that the unit is running, the water temperature of the water tank rises along with the time, but the user can not know how long the heat pump water heater needs to heat from the current water temperature to the target set water temperature, so that the time for the user to continuously check the water heater is increased, and the great time waste is caused. Therefore, for the convenience of the user, the water heater needs to determine the heating time and display the heating time.
At present, in an existing method for determining heating time of a water heater, the heating time of the water heater is determined according to temperature change of water in a water tank of the water heater, for example, water temperature change from the beginning of preset heating time to the end of the preset heating time, that is, the heating time is determined only according to the water temperature change, and the reliability of determining the heating time of the water heater is affected without considering the heating capacity of a unit in the water heater.
Disclosure of Invention
The embodiment of the invention provides a method for determining the heating time of a water heater and the water heater, and aims to improve the reliability of determining the heating time of the water heater.
In a first aspect, an embodiment of the present invention provides a method for determining a heating time of a water heater, including:
acquiring a refrigerating capacity rated parameter, an input power rated parameter, an evaporation temperature and a condensation temperature of a unit of a water heater, and an inlet water temperature, a preset upper limit temperature and a water quality of a water tank of the water heater when the water heater starts to heat;
determining the unit heating capacity of the water heater according to the refrigerating capacity rated parameter, the input power rated parameter, the evaporation temperature and the condensation temperature of a compressor in the unit;
determining the heating quantity required by heating the water tank of the water heater to a preset target temperature according to the water inlet temperature of the water tank, the preset upper limit temperature and the water quality of the water tank;
and determining the ratio of the required heating capacity to the unit heating capacity according to the unit heating capacity and the required heating capacity, and taking the ratio as the heating time of the water heater.
Optionally, determining the unit heating capacity of the water heater according to the refrigerating capacity rated parameter, the input power rated parameter, the evaporating temperature and the condensing temperature of the unit compressor in the unit, and the method includes:
determining the unit refrigerating capacity of the water heater according to the refrigerating capacity rated parameter of a compressor in the unit, the evaporating temperature and the condensing temperature of the unit;
determining the unit input power of the water heater according to the input power rated parameter of a compressor in the unit, the evaporation temperature and the condensation temperature of the unit;
and taking the sum of the refrigerating capacity of the unit and the input power of the unit as the heating capacity of the unit.
Optionally, the rated cooling capacity parameter of the compressor in the unit is C1-C10, the evaporation temperature of the unit is x, the condensation temperature of the unit is y, the unit cooling capacity of the water heater is Qc, and the unit cooling capacity Qc is C1+ C2 x + C3 y + C4 x ^2+ C5 x y + C6 y ^2+ C7 x ^3+ C8 x ^2 x ^ y + C9 x ^ y ^2+ C10 y 3.
Optionally, the input power rating parameter of the compressor in the unit is P1-P10, the evaporation temperature of the unit is x, the condensation temperature of the unit is y, the unit input power of the water heater is P, and the unit input power P is P1+ P2 x + P3 y + P4 x ^2+ P5 x + P6 y ^2+ P7 x ^3+ P8 x ^2+ P9 x ^ y ^2+ P10 y ^ 3.
Optionally, according to the temperature of intaking of water tank, predetermine upper limit temperature and water tank water quality, confirm that the water tank of water heater heats to predetermineeing the required heating capacity of target temperature, include:
determining the difference between the preset upper limit temperature and the inlet water temperature according to the inlet water temperature and the preset upper limit temperature;
and taking a preset multiple of the product of the difference between the preset upper limit temperature and the inlet water temperature and the water quality of the water tank as the heating quantity required by the water heater to heat to the preset target temperature.
Optionally, the inlet water temperature is Tx, the preset upper limit temperature Ty is, the water quality of the water tank is M, the heating capacity of the water tank is Q2, Q2 is K M (Ty-Tx), and K is a coefficient.
Optionally, the heating capacity of the unit is Q1, the required heating capacity is Q2, and the heating time of the water heater is Hs, Hs being Q2/Q1.
Optionally, the evaporation temperature is obtained by a temperature sensor of an evaporation coil in the unit, and the condensation temperature is the sum of the inlet water temperature and a preset correction value.
In a second aspect, an embodiment of the present invention further provides a water heater, including: the water tank is provided with a water tank temperature sensor, and the compressor, the evaporator coil temperature sensor and the water tank temperature sensor are all electrically connected with the controller; the controller is used for:
acquiring a refrigerating capacity rated parameter, an input power rated parameter, an evaporation temperature and a condensation temperature of a unit, a water inlet temperature of a water tank when a water heater starts to heat, a preset upper limit temperature and water quality of the water tank of the compressor;
determining the unit heating capacity of the water heater according to the refrigerating capacity rated parameter, the input power rated parameter, the evaporation temperature and the condensation temperature of the unit of the compressor;
determining the heating capacity required by the water tank of the water heater according to the water inlet temperature of the water tank, the preset upper limit temperature and the water quality of the water tank;
and determining the ratio of the heating capacity required by the water tank to the heating capacity of the unit according to the heating capacity of the unit and the heating capacity of the water tank, and taking the ratio as the heating time of the water heater.
Optionally, the water heater is further provided with a display screen, the display screen is electrically connected with the controller, and the display screen is used for displaying the heating time transmitted by the controller.
According to the method for determining the heating time of the water heater and the water heater, provided by the embodiment of the invention, the refrigerating capacity rated parameter, the input power rated parameter, the evaporation temperature and the condensation temperature of a unit in the unit of the water heater, and the water inlet temperature, the preset upper limit temperature and the water quality of a water tank of the water heater when the water heater starts to heat are obtained; determining the unit heating capacity of the water heater according to the refrigerating capacity rated parameter, the input power rated parameter, the evaporation temperature and the condensation temperature of a compressor in the unit; determining the heating quantity required by the water heater to heat to a preset target temperature according to the water inlet temperature of the water tank, the preset upper limit temperature and the water quality of the water tank; therefore, the ratio of the required heating capacity to the unit heating capacity is determined according to the unit heating capacity and the required heating capacity, and the ratio is used as the heating time of the water heater. According to the method for determining the heating time of the water heater and the water heater, the heating time of the water heater is determined based on the unit heating capacity and the required heating capacity, the heating time is determined according to the change of the water temperature, the heating time of the water heater is determined by combining the conditions of the unit heating capacity and the like in the water heater, and the reliability of determining the heating time of the water heater can be improved.
Drawings
FIG. 1 is a flow chart of a method for determining heating time of a water heater according to an embodiment of the present invention;
FIG. 2 is a flow chart of a method for determining heating time of a water heater according to a second embodiment of the present invention;
fig. 3 is a structural block diagram of a part of components of a water heater according to a second embodiment of the present invention;
fig. 4 is a schematic structural diagram of a water heater according to a second embodiment of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures.
Example one
Fig. 1 is a flowchart of a method for determining a heating time of a water heater according to an embodiment of the present invention, where the embodiment is applicable to determining the heating time of the water heater, and the method may be executed by a controller in the water heater, and the method specifically includes the following steps:
and 110, acquiring a refrigerating capacity rated parameter, an input power rated parameter, an evaporation temperature and a condensation temperature of a unit of the water heater, and an inlet water temperature, a preset upper limit temperature and a water quality of a water tank of the water heater when the water heater starts to heat.
The refrigerating capacity rated parameter, the input power rated parameter, the preset upper limit temperature of the water tank and the water quality of the water tank of the compressor can be stored in the controller in advance. The controller in the water heater can be electrically connected with a temperature sensor of an evaporation coil in the unit to obtain the evaporation temperature of the unit, the condensation temperature of the unit is the sum of the water inlet temperature of the water tank and a preset correction value, and the controller can also be electrically connected with a temperature sensor of the water tank to obtain the water inlet temperature of the water tank.
And step 120, determining the unit heating capacity of the water heater according to the refrigerating capacity rated parameter, the input power rated parameter, the evaporation temperature and the condensation temperature of the unit of the compressor in the unit.
Illustratively, the unit heating capacity of the water heater is the sum of the unit refrigerating capacity and the unit input power, the unit input power is related to the input power rated parameter of the compressor and the evaporation temperature and the condensation temperature of the unit, the unit refrigerating capacity is related to the refrigerating capacity rated parameter of the compressor, the evaporation temperature and the condensation temperature of the unit, and the unit refrigerating capacity and the unit input power can be obtained through calculation.
And step 130, determining the heating quantity required by the water heater to be heated to the preset target temperature according to the water inlet temperature of the water tank, the preset upper limit temperature and the water quality of the water tank.
Specifically, the product of the difference between the preset upper limit temperature of the water tank and the inlet water temperature and the water quality of the water tank and the heating capacity of the water tank are in a multiple relation, and the heating capacity required by the water heater to be heated to the preset target temperature can be calculated according to the product of the difference between the preset upper limit temperature of the water tank and the inlet water temperature and the water quality of the water tank.
And 140, determining the ratio of the required heating capacity to the unit heating capacity according to the unit heating capacity and the required heating capacity, and taking the ratio as the heating time of the water heater.
The heating capacity of the unit is Q1, the required heating capacity is Q2, and the heating time of the water heater is Hs, wherein Hs is Q2/Q1. Namely, the heating time of the water heater is in a proportional relation with the unit heating capacity and the required heating capacity, the heating time of the water heater is determined based on the unit heating capacity and the required heating capacity, the heating time is determined according to the change of the water temperature, the heating time of the water heater is determined by combining the conditions of the unit heating capacity and the like in the water heater, and the reliability of determining the heating time of the water heater can be improved.
According to the method for determining the heating time of the water heater, the unit heating capacity of the water heater is determined according to the acquired refrigerating capacity rated parameter, input power rated parameter, evaporation temperature and condensation temperature of the unit of the compressor in the unit; determining the heating quantity required by the water heater to heat to a preset target temperature according to the acquired water inlet temperature of the water tank, the preset upper limit temperature and the water quality of the water tank; therefore, the ratio of the required heating capacity to the unit heating capacity is determined according to the unit heating capacity and the required heating capacity, and the ratio is used as the heating time of the water heater. According to the method for determining the heating time of the water heater, the heating time of the water heater is determined based on the unit heating capacity and the required heating capacity, the heating time is determined according to the water temperature change, the heating time of the water heater is determined by combining the conditions of the unit heating capacity and the like in the water heater, and the reliability of determining the heating time of the water heater can be improved.
Example two
Fig. 2 is a flowchart of a method for determining a heating time of a water heater according to a second embodiment of the present invention, where the second embodiment is applicable to determining the heating time of the water heater, and the method may be executed by a controller in the water heater, and the method specifically includes the following steps:
Specifically, fig. 3 is a block diagram of a structure of a part of components of a water heater according to a second embodiment of the present invention, fig. 4 is a schematic structural diagram of a water heater according to a second embodiment of the present invention, and with reference to fig. 3 and fig. 4, an exemplary water heater includes: the water tank type air conditioner comprises a unit 10, an evaporator 20, a water tank 30 and a controller 40, wherein the unit 10 is provided with a compressor 11, the evaporator 20 is provided with an evaporator coil temperature sensor 21, the water tank 30 is provided with a water tank temperature sensor 31, the evaporator 20 is communicated with the water tank 30 and the compressor 11, the evaporator coil temperature sensor 21 and the water tank temperature sensor 31 are all electrically connected with the controller 40 so that the controller 40 can obtain the evaporation temperature of the unit 10 and the water inlet temperature of the water tank 30. The controller 40 may obtain the temperature collected by the water tank temperature sensor 31 when detecting that the compressor 11 starts to operate, and use the temperature obtained at this time as the water inlet temperature of the water tank 30 when the water heater starts to heat. The condensing temperature of the unit 10 is the sum of the inlet water temperature of the water tank 30 and a preset correction value, and the condensing temperature correction value, i.e., the preset correction value, is shown in table 1.
TABLE 1 Preset correction values
And step 220, determining the unit refrigerating capacity of the water heater according to the refrigerating capacity rated parameter of the compressor in the unit, the evaporating temperature and the condensing temperature of the unit.
Illustratively, the rated cooling capacity parameter of the compressor 11 is C1-C10, the evaporation temperature of the unit 10 is x, the condensation temperature of the unit 10 is y, the unit cooling capacity of the water heater is Qc, and the unit cooling capacity Qc is C1+ C2 x + C3 y + C4 x ^2+ C5 x ^ y + C6 y ^2+ C7 x ^3+ C8 x ^2 y + C9 x ^ y ^2+ C10 y 3.
And step 230, determining the unit input power of the water heater according to the input power rated parameter of the compressor in the unit, the evaporation temperature and the condensation temperature of the unit.
Illustratively, the input power rating of the compressor 11 is P1-P10, the evaporation temperature of the unit 10 is x, the condensation temperature of the unit is y, the unit input power of the water heater is P, and the unit input power P is P1+ P2 x + P3 y + P4 x ^2+ P5 x y + P6 y ^2+ P7 x ^3+ P8 x ^2 x y + P9 x ^ y ^2+ P10 y ^ 3.
Wherein each compressor 11 has ten rated parameters corresponding thereto, such as the Meizhi PH165X1C-4DZDE2 compressor, and the ten rated parameters are shown in Table 2.
TABLE 2 rated parameters of the compressor
| Refrigerating capacity (W) | Input power (W) | ||
| C1 | 3.35220093E+03 | P1 | 1.13571690E+02 |
| C2 | 1.00050323E+02 | P2 | -9.88070400E+00 |
| C3 | -1.29200387E+01 | P3 | 2.23357502E+01 |
| C4 | -3.28213452E-01 | P4 | -2.35678341E-01 |
| C5 | -4.91200264E-01 | P5 | 1.95536534E-01 |
| C6 | -1.38644338E-01 | P6 | -2.94160721E-01 |
| C7 | 1.54580018E-01 | P7 | -2.78249141E-03 |
| C8 | 1.13154906E-03 | P8 | 8.18864241E-04 |
| C9 | -3.12819931E-03 | P9 | 1.93250444E-03 |
| C10 | 1.61897630E-04 | P10 | 2.72283988E-03 |
And step 240, taking the sum of the refrigerating capacity and the input power of the unit as the heating capacity of the unit.
Specifically, the formula in the above steps is simulated as shown in table 3, and the unit heating amount Q1(Q1 ═ Qc + P) can be calculated in real time through the evaporation temperature and the condensation temperature.
TABLE 3 calculation of the heating capacity of the unit
| C1 | 3.35E+03 | P1 | 1.14E+02 |
| C2 | 1.00E+02 | P2 | -9.88E+00 |
| C3 | -1.29E+01 | P3 | 2.23E+01 |
| C4 | -3.28E-01 | P4 | -2.36E-01 |
| C5 | -4.12E-01 | P5 | 1.96E-01 |
| C6 | -1.39E-01 | P6 | -2.94E-01 |
| C7 | 1.55E-01 | P7 | -2.78E-03 |
| C8 | 1.13E-03 | P8 | 8.19E-04 |
| C9 | -3.13E-03 | P9 | 1.93E-03 |
| C10 | 1.62E-04 | P10 | 2.72E-03 |
| Evaporation temperature | 6.00 | ||
| Condensation temperature | 50.00 | ||
| Refrigerating capacity Qc | 2833.21 | Input power P | 856.07 |
| Heating capacity Q1 | 3689.28 |
And step 250, determining the difference between the preset upper limit temperature and the inlet water temperature according to the inlet water temperature and the preset upper limit temperature.
Specifically, the inlet water temperature of the water tank 30 is Tx, the preset upper limit temperature Ty, and the difference between the preset upper limit temperature and the inlet water temperature is Ty-Tx. Wherein the preset upper limit temperature can be preset by a user.
And step 260, taking a preset multiple of the product of the difference between the preset upper limit temperature and the inlet water temperature and the water quality of the water tank as the required heating quantity.
Wherein, the water quality of the water tank is M, the required heating capacity is Q2, Q2 is K M (Ty-Tx), K is a coefficient, and K is 1.163.
And 270, determining the ratio of the required heating capacity to the unit heating capacity according to the unit heating capacity and the required heating capacity, and taking the ratio as the heating time of the water heater.
Illustratively, in conjunction with fig. 3 and 4, the unit 10 is further provided with a four-way valve 12, and the paths of the evaporator 20 and the water tank 30 are also provided with an electronic expansion valve 50. The water heater is further provided with a display screen 60, the display screen 60 is electrically connected with the controller 40, and the display screen 60 is used for displaying the heating time transmitted by the controller 40 (the heating time of the water heater is Q2/Q1), so that the user can conveniently view the heating time.
According to the method for determining the heating time of the water heater, the heating time of the water heater is determined based on the unit heating capacity and the required heating capacity, the heating time is determined according to the water temperature change, the heating time of the water heater is determined by combining the conditions of the unit heating capacity and the like in the water heater, and the reliability of determining the heating time of the water heater can be improved.
It is to be noted that the foregoing is only illustrative of the preferred embodiments of the present invention and the technical principles employed. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, although the present invention has been described in greater detail by the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the spirit of the present invention, and the scope of the present invention is determined by the scope of the appended claims.
Claims (10)
1. A method for determining a heating time of a water heater, comprising:
acquiring a refrigerating capacity rated parameter, an input power rated parameter, an evaporation temperature and a condensation temperature of a compressor in a unit of a water heater, and an inlet water temperature, a preset upper limit temperature and a water quality of a water tank of the water heater when the water heater starts to heat;
determining the unit heating capacity of the water heater according to the refrigerating capacity rated parameter, the input power rated parameter, the evaporation temperature and the condensation temperature of a compressor in the unit;
determining the heating quantity required by the water heater to be heated to a preset target temperature according to the water inlet temperature of the water tank, a preset upper limit temperature and the water quality of the water tank;
and determining the ratio of the required heating capacity to the unit heating capacity according to the unit heating capacity and the required heating capacity, and taking the ratio as the heating time of the water heater.
2. The method for determining the heating time of the water heater according to claim 1, wherein the determining the unit heating capacity of the water heater according to the refrigerating capacity rated parameter, the input power rated parameter, the evaporating temperature and the condensing temperature of the unit of the compressor in the unit comprises:
determining the unit refrigerating capacity of the water heater according to the refrigerating capacity rated parameter of a compressor in the unit, the evaporating temperature and the condensing temperature of the unit;
determining the unit input power of the water heater according to the input power rated parameter of a compressor in the unit, the evaporation temperature and the condensation temperature of the unit;
and taking the sum of the refrigerating capacity of the unit and the input power of the unit as the heating capacity of the unit.
3. The method for determining the heating time of a water heater according to claim 2, wherein the rated cooling capacity of a compressor in the unit is C1-C10, the evaporation temperature of the unit is x, the condensation temperature of the unit is y, the unit cooling capacity of the water heater is Qc, and the unit cooling capacity Qc is C1+ C2 x + C3 y + C4 x ^2+ C5 x + C6 y ^2+ C7 x ^3+ C8 x ^2 x ^ y + C9 x ^ y 2+ C10 y ^ 3.
4. The method of claim 2, wherein the input power rating of the compressor in the plant is P1-P10, the evaporation temperature of the plant is x, the condensation temperature of the plant is y, the plant input power of the water heater is P, and the plant input power P is P1+ P2 x + P3 x + P4 x 2+ P5 x + P6 x 2+ P7 x 3+ P8 x 2 x + P9 x 2+ P10 y 3.
5. The method for determining the heating time of a water heater according to claim 1, wherein the step of determining the heating quantity required by the water heater to heat to the preset target temperature according to the water inlet temperature of the water tank, the preset upper limit temperature and the water quality of the water tank comprises the following steps:
determining the difference between the preset upper limit temperature and the water inlet temperature according to the water inlet temperature and the preset upper limit temperature;
and taking a preset multiple of the product of the difference between the preset upper limit temperature and the water inlet temperature and the water quality of the water tank as the heating quantity required by the water heater to heat to a preset target temperature.
6. The method for determining the heating time of a water heater according to claim 5, wherein the inlet water temperature is Tx, the preset upper limit temperature Ty, the water quality of the water tank is M, the heating capacity of the water tank is Q2, Q2 is K M (Ty-Tx), and K is a coefficient.
7. The method for determining the heating time of a water heater according to claim 1, wherein the set heating capacity is Q1, the required heating capacity is Q2, and the heating time of the water heater is Hs, Hs-Q2/Q1.
8. The method for determining the heating time of a water heater according to claim 1, wherein the evaporation temperature is obtained by a temperature sensor of an evaporation coil in the unit, and the condensation temperature is the sum of the water inlet temperature and a preset correction value.
9. A water heater, comprising: the water tank is provided with a water tank temperature sensor, and the compressor, the evaporator coil temperature sensor and the water tank temperature sensor are all electrically connected with the controller; the controller is configured to:
acquiring a refrigerating capacity rated parameter and an input power rated parameter of the compressor, an evaporation temperature and a condensation temperature of the unit, and an inlet water temperature, a preset upper limit temperature and a water quality of the water tank when the water heater starts to heat;
determining the unit heating capacity of the water heater according to the refrigerating capacity rated parameter and the input power rated parameter of the compressor, and the evaporation temperature and the condensation temperature of the unit;
determining the heating quantity required by the water heater to be heated to a preset target temperature according to the water inlet temperature of the water tank, a preset upper limit temperature and the water quality of the water tank;
and determining the ratio of the required heating capacity to the unit heating capacity according to the unit heating capacity and the required heating capacity, and taking the ratio as the heating time of the water heater.
10. The water heater of claim 9, further comprising a display screen electrically connected to the controller for displaying the heating time transmitted by the controller.
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| JP2002168524A (en) * | 2000-12-01 | 2002-06-14 | Denso Corp | Hot water supply device |
| CN104930714A (en) * | 2015-06-11 | 2015-09-23 | Tcl空调器(中山)有限公司 | Heat pump type water heater and heating control method thereof |
| CN108397853A (en) * | 2018-02-11 | 2018-08-14 | 珠海格力电器股份有限公司 | Air conditioning unit control method and device |
| CN110631283A (en) * | 2019-10-08 | 2019-12-31 | 广东纽恩泰新能源科技发展有限公司 | Loading and unloading control method and system for heat pump multi-machine parallel system |
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2021
- 2021-07-08 CN CN202110771445.XA patent/CN113503645A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002168524A (en) * | 2000-12-01 | 2002-06-14 | Denso Corp | Hot water supply device |
| CN104930714A (en) * | 2015-06-11 | 2015-09-23 | Tcl空调器(中山)有限公司 | Heat pump type water heater and heating control method thereof |
| CN108397853A (en) * | 2018-02-11 | 2018-08-14 | 珠海格力电器股份有限公司 | Air conditioning unit control method and device |
| CN110631283A (en) * | 2019-10-08 | 2019-12-31 | 广东纽恩泰新能源科技发展有限公司 | Loading and unloading control method and system for heat pump multi-machine parallel system |
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