CN-122015293-A - Control method of heat pump water heater and heat pump water heater

Abstract

The application provides a control method of a heat pump water heater and the heat pump water heater, and relates to the technical field of heat pumps. The control method comprises the steps of obtaining the actual temperature rise rate of the heat pump water heater in the current environment and the target temperature rise rate of the heat pump water heater, determining target operating frequency based on the actual temperature rise rate and the target temperature rise rate, and controlling the operation of a compressor in the heat pump water heater based on the target operating frequency. The control method can ensure that the heating capacity of the heat pump water heater is adapted to the environmental change so as to meet the water consumption requirement of a user.

Inventors

• SHEN WENTAO
• GONG JIAJUN
• WANG CHENCHEN
• HUANG JIANCHUAN
• LI HONGWEI

Assignees

• 广东美的暖通设备有限公司
• 合肥美的暖通设备有限公司

Dates

Publication Date

20260512

Application Date

20260209

Claims (10)

1. 1. A control method of a heat pump water heater, the control method comprising: acquiring the actual temperature rise rate of the heat pump water heater in the current environment and the target temperature rise rate of the heat pump water heater; determining a target operating frequency based on the actual temperature rise rate and the target temperature rise rate; And controlling the operation of a compressor in the heat pump water heater based on the target operation frequency.
2. 2. The control method according to claim 1, wherein the determining a target operating frequency based on the actual temperature rise rate and the target temperature rise rate includes: Determining an operating mode of the compressor based on the actual temperature rise rate and the target temperature rise rate; the target operating frequency is determined based on an operating mode of the compressor.
3. 3. The control method according to claim 2, wherein the determining the operation mode of the compressor based on the actual temperature rise rate and the target temperature rise rate includes: When the actual temperature rise rate is greater than or equal to the target temperature rise rate, determining that the operation mode of the compressor is a first operation mode, and operating the compressor at a fixed frequency in the first operation mode; And when the actual temperature rise rate is smaller than the target temperature rise rate, determining that the operation mode of the compressor is a second operation mode, wherein the second operation mode refers to a mode for performing frequency compensation on the compressor.
4. 4. The control method according to claim 2, wherein the determining the target operating frequency based on the operating mode of the compressor includes: When the operation mode of the compressor is a first operation mode, determining a first preset frequency as the target operation frequency; And when the operation mode of the compressor is a second operation mode, determining the target operation frequency based on the actual temperature rise rate.
5. 5. The control method according to claim 4, wherein the determining the target operating frequency based on the actual temperature rise rate includes: when the actual temperature rise rate is greater than or equal to a first rate threshold, determining a second preset frequency as the target operating frequency; when the actual temperature rise rate is smaller than the first rate threshold and larger than or equal to the second rate threshold, determining a third preset frequency as the target operating frequency; when the actual temperature rise rate is smaller than the second rate threshold, determining a fourth preset frequency as the target operating frequency; The first speed threshold is smaller than the target temperature rise speed, the second speed threshold is smaller than the first speed threshold, and the target running frequency is the first preset frequency, the second preset frequency, the third preset frequency and the fourth preset frequency from small to large in sequence.
6. 6. The control method according to any one of claims 1 to 5, characterized in that the control method further comprises: acquiring the water tank temperature and the environment temperature of the heat pump water heater in the current environment; determining the target temperature rise rate based on the tank temperature and the ambient temperature; wherein the target rate of temperature rise is inversely related to the water tank temperature and the target rate of temperature rise is positively related to the ambient temperature.
7. 7. The control method according to any one of claims 1 to 5, characterized in that the control method further comprises: after the heat pump water heater is started, determining a target difference value between the exhaust temperature of the heat pump water heater and the temperature of a water tank; The obtaining the actual temperature rise rate of the heat pump water heater in the current environment and the target temperature rise rate of the heat pump water heater comprises the following steps: And when the target difference value is greater than or equal to a preset difference value threshold value, acquiring the actual temperature rise rate of the heat pump water heater in the current environment and the target temperature rise rate of the heat pump water heater.
8. 8. The control method according to any one of claims 3 to 5, characterized in that the control method further comprises: In the process of controlling the operation of the compressor in the heat pump water heater, acquiring the current temperature rise rate and the current target temperature rise rate of the heat pump water heater in a period of a preset duration; and controlling the heat pump water heater based on the current temperature rise rate and the current target temperature rise rate.
9. 9. The control method according to claim 8, wherein the controlling the heat pump water heater based on the current temperature rise rate and the current target temperature rise rate includes: when the current temperature rise rate is greater than or equal to the current target temperature rise rate, controlling the compressor to run at a first preset frequency; when the current temperature rise rate is smaller than the current target temperature rise rate and the target cycle number is smaller than or equal to a preset cycle number, controlling the compressor to run at a target running frequency corresponding to the current temperature rise rate; When the current temperature rise rate is smaller than the current target temperature rise rate and the target cycle number is larger than the preset cycle number, controlling an electric auxiliary heating device in the heat pump water heater to be started; the target cycle number is the cumulative cycle number of the preset duration cycle when the current temperature rise rate is detected to be smaller than the current target temperature rise rate.
10. 10. A heat pump water heater, the heat pump water heater comprising: a memory for storing executable program code; A processor for calling and running the executable program code from the memory to cause the heat pump water heater to perform the method of any one of claims 1 to 9.

Description

Control method of heat pump water heater and heat pump water heater Technical Field The application relates to the technical field of heat pumps, in particular to a control method of a heat pump water heater and the heat pump water heater in the technical field of heat pumps. Background Traditional heat pump water heater is usually through the heat pump host computer continuously to the water in the water tank heating for the water in the water tank keeps higher temperature, for the user to use, at this in-process, the heat accumulation ability of heat accumulation water tank can receive the influence of surrounding environment, leads to hot water temperature to receive the restriction, can't satisfy user's water demand, influences user's use experience. Therefore, how to ensure that the heating capacity of the heat pump water heater adapts to the environmental change so as to meet the water demand of users is a problem to be solved urgently. Disclosure of Invention The application provides a control method of a heat pump water heater and the heat pump water heater, which can ensure that the heating capacity of the heat pump water heater is adaptive to environmental changes so as to meet the water use requirement of a user. In a first aspect, a control method of a heat pump water heater is provided, the control method including: acquiring the actual temperature rise rate of the heat pump water heater in the current environment and the target temperature rise rate of the heat pump water heater; Determining a target operating frequency based on the actual temperature rise rate and the target temperature rise rate; and controlling the operation of the compressor in the heat pump water heater based on the target operation frequency. According to the technical scheme, the actual temperature rise rate and the target temperature rise rate of the heat pump water heater in the current environment are monitored, the target operating frequency of the compressor in the heat pump water heater is determined according to the actual temperature rise rate and the target temperature rise rate, and the compressor is controlled to operate at the target operating frequency. Compared with the prior art that the compressor operates at a fixed rated frequency, the operating frequency of the compressor is adjusted by combining the temperature rise rate in the current environment, so that the heating capacity of the heat pump water heater is matched with the heating requirement in the current environment, the heating capacity of the heat pump water heater is ensured to be matched with the current environment, and the water consumption requirement of a user on hot water is met. With reference to the first aspect, in some possible implementations, determining the target operating frequency based on the actual temperature rise rate and the target temperature rise rate includes: determining an operation mode of the compressor based on the actual temperature rise rate and the target temperature rise rate; The target operating frequency is determined based on the operating mode of the compressor. According to the technical scheme, firstly, the operation mode of the compressor is determined according to the actual temperature rise rate and the target temperature rise rate, and then the specific target operation frequency is determined according to the operation mode of the compressor. By determining the operation mode first and then determining the layering control strategy of the target frequency, the frequency adjustment of the compressor is more targeted, and the efficiency of determining the target operation frequency of the compressor under different working conditions is improved. With reference to the first aspect and the foregoing implementation manner, in some possible implementation manners, determining an operation mode of the compressor based on the actual temperature rise rate and the target temperature rise rate includes: When the actual temperature rise rate is greater than or equal to the target temperature rise rate, determining that the operation mode of the compressor is a first operation mode, and operating the compressor at a fixed frequency in the first operation mode; And when the actual temperature rise rate is smaller than the target temperature rise rate, determining the operation mode of the compressor as a second operation mode, wherein the second operation mode refers to a mode for performing frequency compensation on the compressor. In the technical scheme, when the actual temperature rise rate is greater than or equal to the target temperature rise rate, the operation mode of the compressor is determined to be a first operation mode so as to indicate the compressor to operate at a fixed frequency, and when the actual temperature rise rate is less than the target temperature rise rate, the operation mode of the compressor is determined to be a second operation mode so as to perform frequency compensation on th