CN-121977291-A - Heat pump water heater system, control method thereof, electronic equipment and storage medium

CN121977291ACN 121977291 ACN121977291 ACN 121977291ACN-121977291-A

Abstract

The invention discloses a heat pump water heater system, a control method thereof, electronic equipment and a storage medium, wherein the control method of the heat pump water heater system comprises the following steps of acquiring the temperature Ts of a radiator arranged at the outlet of a main flow path of a subcooler and the outdoor environment temperature Th in a heating mode; according to the temperature Ts of the radiator and the outdoor environment temperature Th, the opening and closing of the second electronic expansion valve between the outlet of the first electronic expansion valve of the main circulation loop and the inlet of the supercooled auxiliary flow path in the heat pump water heater system are determined, the heat absorption effect of the refrigerant can be improved, the limit working condition operation requirement of the heat pump water heater can be effectively improved, the product reliability is improved, and the heat dissipation capacity is enhanced.

Inventors

LIU AIJUN
DENG WEIBIN
LI ZI
JI YUTAO
LIANG GUANWEN

Assignees

珠海格力电器股份有限公司

Dates

Publication Date: 20260505
Application Date: 20260126

Claims (10)

1. The control method of the heat pump water heater system is characterized by comprising the following steps of: in a heating mode, acquiring the temperature Ts of a radiator arranged at the outlet of a main flow path of the subcooler and the outdoor environment temperature Th; and determining the opening and closing of a second electronic expansion valve between the outlet of the first electronic expansion valve of the main circulation loop and the inlet of the supercooled auxiliary flow path in the heat pump water heater system according to the temperature Ts of the radiator and the outdoor environment temperature Th.
2. The control method according to claim 1, characterized in that: If the difference between the temperature Ts of the radiator and the outdoor environment temperature Th is larger than the temperature difference threshold value and the temperature Ts of the radiator is larger than the first temperature threshold value, opening the second electronic expansion valve; If the difference value between the temperature Ts of the radiator and the outdoor environment temperature Th is smaller than or equal to the temperature difference threshold value and the temperature Ts of the radiator is smaller than the second temperature threshold value, the second electronic expansion valve is closed; If the conditions are other conditions, the current state of the second electronic expansion valve is kept; The first temperature threshold is greater than the second temperature threshold.
3. The control method according to claim 2, characterized in that: When the second electronic expansion valve is in an open state, if the temperature Ts of the radiator is larger than a first temperature threshold value, increasing the opening of the second electronic expansion valve, and if the temperature Ts of the radiator is smaller than a third temperature threshold value, decreasing the opening of the second electronic expansion valve; the second temperature threshold < third temperature threshold < first temperature threshold.
4. The control method according to claim 1, characterized in that: Acquiring the water inlet temperature of the water side heat exchanger; and controlling the opening and closing of a bypass electromagnetic valve between the inlet and the outlet of the refrigerant flow path of the water side heat exchanger according to the water inlet temperature Tw, the outdoor environment temperature Th and the radiator bulb temperature Ts of the water side heat exchanger.
5. The control method according to claim 4, characterized in that: When the water inlet temperature Tw of the water side heat exchanger is smaller than the outdoor environment temperature Th, and the difference between the temperature Ts of the radiator and the outdoor environment temperature Th is smaller than a preset difference, the bypass electromagnetic valve is opened, and otherwise, the bypass electromagnetic valve is closed.
6. A heat pump water heater system for performing the control method of any one of claims 1-5, comprising a main circulation loop, an ambient temperature bulb (9), a radiator bulb (10) and a controller; The refrigerant of the main circulation loop sequentially passes through an exhaust port of the compressor (1), the four-way valve (2), the water side heat exchanger (3), a main flow path of the supercooling (4), the first electronic expansion valve (5) and the evaporator (7), and then enters the air suction port of the compressor (1) through the four-way valve (2) again; a radiator (6) is arranged at the outlet of the main flow path of the subcooler; a second electronic expansion valve (8) is arranged between the outlet of the first electronic expansion valve (5) and the auxiliary flow path inlet of the subcooler (4), and the auxiliary flow path outlet of the subcooler (4) is connected with the air suction port of the compressor (1); the environment temperature sensing bulb (9) is arranged at the evaporator (7) and is used for acquiring outdoor environment temperature; the radiator temperature sensing bulb (10) is arranged at the radiator (6) and is used for acquiring the temperature of the radiator; The controller is connected with the environment temperature sensing bulb (9) and the radiator temperature sensing bulb (10), and controls the opening and closing of the second electronic expansion valve (8) after the temperature of the radiator sent by the radiator temperature sensing bulb (10) and the outdoor environment temperature sent by the environment temperature sensing bulb (9) are calculated.
7. The heat pump water heater system according to claim 6, wherein: a bypass electromagnetic valve (11) is arranged between an inlet and an outlet of a refrigerant flow path of the heat exchanger.
8. The heat pump water heater system according to claim 6, wherein: The water inlet side of the water side heat exchanger is provided with a water inlet temperature sensing bulb for acquiring water inlet temperature.
9. An electronic device comprising a memory, a processor and a computer program stored on the memory and executable on the processor, characterized in that the computer program when loaded into the processor implements the control method according to any of claims 1-5.
10. A storage medium, characterized by: The storage medium comprising a stored program, wherein the program, when run, controls a device in which the storage medium is located to perform the control method of any one of claims 1-5.

Description

Heat pump water heater system, control method thereof, electronic equipment and storage medium Technical Field The present invention relates to the field of heat pump technologies, and in particular, to a heat pump water heater system, a control method thereof, an electronic device, and a storage medium. Background The air energy heat pump water heater is a device for preparing hot water by utilizing heat in air and has the characteristics of high efficiency and energy conservation. With the energy-saving requirement of products, more and more heat pump water heaters have been frequency-converted. However, heat dissipation of the frequency conversion module is a key problem, and the industry generally adopts a refrigerant heat dissipation method to reduce the temperature of the module, or selects a module device with higher temperature resistance. However, the refrigerant heat dissipation method is adopted, namely, the refrigerant enters the electric control radiating fin after being condensed by the condenser and the temperature of the electric control heat exchange module is reduced, and because the refrigerant is only condensed, under the working condition of high water temperature, the deviation of the electric control heat dissipation effect and the operation of the high-temperature limiting working condition are caused because the condensation temperature is higher, and the frequency of the compressor is required to be limited to meet the electric control heating requirement, so that the output of the product capacity is influenced. Disclosure of Invention The invention provides a heat pump water heater system, a control method thereof, electronic equipment and a storage medium, and aims to solve the problem that a controller in the prior art is poor in heat dissipation effect. The invention adopts the following technical scheme: The first aspect of the invention provides a control method of a heat pump water heater system, comprising the following steps: in a heating mode, acquiring the temperature Ts of a radiator arranged at the outlet of a main flow path of the subcooler and the outdoor environment temperature Th; and determining the opening and closing of a second electronic expansion valve between the outlet of the first electronic expansion valve of the main circulation loop and the inlet of the supercooled auxiliary flow path in the heat pump water heater system according to the temperature Ts of the radiator and the outdoor environment temperature Th. According to the control method, if the difference between the temperature Ts of the radiator and the outdoor environment temperature Th is larger than a temperature difference threshold value and the temperature Ts of the radiator is larger than a first temperature threshold value, the second electronic expansion valve is opened; If the difference value between the temperature Ts of the radiator and the outdoor environment temperature Th is smaller than or equal to the temperature difference threshold value and the temperature Ts of the radiator is smaller than the second temperature threshold value, the second electronic expansion valve is closed; If the conditions are other conditions, the current state of the second electronic expansion valve is kept; The first temperature threshold is greater than the second temperature threshold. According to the control method, when the second electronic expansion valve is in an open state, if the temperature Ts of the radiator is greater than a first temperature threshold value, increasing the opening of the second electronic expansion valve; if the temperature Ts of the radiator is smaller than or equal to the first temperature threshold value and larger than or equal to the third temperature threshold value, the opening of the current second electronic expansion valve is kept; the second temperature threshold < third temperature threshold < first temperature threshold. According to the control method, the water inlet temperature of the water side heat exchanger is obtained; and controlling the opening and closing of a bypass electromagnetic valve between the inlet and the outlet of the refrigerant flow path of the water side heat exchanger according to the water inlet temperature Tw, the outdoor environment temperature Th and the radiator bulb temperature Ts of the water side heat exchanger. According to the control method, when the water inlet temperature Tw of the water side heat exchanger is smaller than the outdoor environment temperature Th and the difference between the temperature Ts of the radiator and the outdoor environment temperature Th is smaller than a preset difference, the bypass electromagnetic valve is opened, and otherwise, the bypass electromagnetic valve is closed. The second aspect of the invention provides a heat pump water heater system for executing the control method, comprising a main circulation loop, an ambient temperature sensing bulb, a radiator sensing bulb and a control