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CN-122015324-A - Control method for heat pump system, and storage medium

CN122015324ACN 122015324 ACN122015324 ACN 122015324ACN-122015324-A

Abstract

The application discloses a control method of a heat pump system, the heat pump system and a storage medium, and relates to the technical field of heat pumps, wherein a refrigerant circulation loop of the heat pump system comprises a compressor, an indoor heat exchanger, a first throttling device and an outdoor heat exchanger which are sequentially connected, and the method comprises the steps of controlling the heat pump system to operate so that the outdoor heat exchanger is in a condensation state and the indoor heat exchanger is in an evaporation state; the first throttling device and/or the compressor is/are controlled to operate according to an outdoor heat exchanger temperature and an outdoor ambient temperature detected by an outdoor temperature sensor of the heat pump system. The application aims to ensure the reliability of the system and improve the refrigerating effect of the heat pump system.

Inventors

  • LUO XIONGFEI
  • DENG HAIZHAO

Assignees

  • 广东美的制冷设备有限公司

Dates

Publication Date
20260512
Application Date
20241111

Claims (13)

  1. 1. A control method of a heat pump system, wherein a refrigerant circulation loop of the heat pump system includes a compressor and an indoor heat exchanger, a first throttling device, and an outdoor heat exchanger connected in sequence, the method comprising: Controlling a heat pump system to operate so that the outdoor heat exchanger is in a condensation state and the indoor heat exchanger is in an evaporation state; The first throttling device and/or the compressor is/are controlled to operate according to an outdoor heat exchanger temperature and an outdoor ambient temperature detected by an outdoor temperature sensor of the heat pump system.
  2. 2. The method of claim 1, wherein the refrigerant circulation loop further comprises a refrigerant heat dissipating assembly and a second throttling device, the first throttling device, the refrigerant heat dissipating module, the first throttling device, and the indoor heat exchanger are connected in sequence, the outdoor heat exchanger temperature is detected when the compressor is not on, the temperature detected when the compressor is not on is defined as an initial ambient temperature by the outdoor temperature sensor, and the step of controlling the operation of the first throttling device according to the outdoor heat exchanger temperature and the outdoor ambient temperature detected by the outdoor temperature sensor of the heat pump system comprises: Controlling the first throttling device to adjust the operation opening according to the state parameter of the reliability of the heat pump system under the condition that the temperature difference value between the initial environment temperature and the temperature of the outdoor heat exchanger is larger than a first preset temperature difference; and controlling the first throttling device to operate in an unthrottled state under the condition that the temperature difference value of the initial environment temperature and the outdoor heat exchanger temperature is smaller than or equal to the first preset temperature difference and the initial environment temperature is larger than or equal to the outdoor heat exchanger temperature.
  3. 3. The method of claim 1, wherein the outdoor heat exchanger temperature is detected when the compressor is not on, the temperature detected when the compressor is not on is defined as an initial ambient temperature by the outdoor temperature sensor, and the step of controlling the operation of the compressor based on the outdoor heat exchanger temperature and the initial ambient temperature comprises: determining a target corresponding relation between a temperature change state of an outdoor environment and control parameters of the compressor according to the temperature of the outdoor heat exchanger and the initial environment temperature; In the running process of the compressor, determining the temperature change state of the outdoor environment according to the current environment temperature detected by the outdoor temperature sensor and the initial environment temperature; and controlling the compressor to adjust the operating frequency according to the temperature change state and the target corresponding relation.
  4. 4. The method of claim 3, wherein the step of determining a target correspondence between a temperature change state of an outdoor environment and a control parameter of the compressor according to the outdoor heat exchanger temperature and the initial environment temperature comprises: And determining a first corresponding relation as the target corresponding relation under the condition that the temperature difference value between the initial environment temperature and the temperature of the outdoor heat exchanger is larger than a first preset temperature difference, and/or, Determining a second corresponding relation as the target corresponding relation under the condition that the temperature difference value of the initial environment temperature and the outdoor heat exchanger temperature is smaller than or equal to the first preset temperature difference and the initial environment temperature is larger than or equal to the outdoor heat exchanger temperature; The first corresponding relation comprises that the frequency of the compressor is increased when the current environment temperature is smaller than the initial environment temperature, and the current frequency or the frequency of the compressor is reduced when the current environment temperature is larger than or equal to the initial environment temperature, and the second corresponding relation comprises that the current frequency or the frequency of the compressor is increased when the temperature difference value of the current environment temperature and the initial environment temperature is smaller than or equal to a second preset temperature difference, and the frequency of the compressor is stopped or reduced when the temperature difference value of the current environment temperature and the initial environment temperature is larger than the second preset temperature difference.
  5. 5. The method of claim 4, wherein when the target correspondence is the first correspondence, the step of controlling the compressor to adjust an operating frequency according to the temperature change state and the target correspondence comprises: determining a frequency adjustment amplitude according to a relationship between a temperature difference value between the initial ambient temperature and the current ambient temperature and the initial ambient temperature when the current ambient temperature is less than the initial ambient temperature; And controlling the compressor to increase the operating frequency according to the frequency adjustment amplitude.
  6. 6. The method of claim 4, wherein the method further comprises: determining an upper frequency limit of the compressor based on the outdoor heat exchanger temperature; When the target corresponding relation is the first corresponding relation, after the step of controlling the compressor to adjust the operating frequency according to the temperature change state and the target corresponding relation, the method further comprises: Returning to the step of executing the temperature change state of the outdoor environment according to the current environment temperature detected by the outdoor temperature sensor and the initial environment temperature in the operation process of the compressor under the condition that the operation frequency of the compressor does not reach the frequency upper limit value; and controlling the compressor to maintain operation at the frequency upper limit value when the operation frequency of the compressor does not reach the frequency upper limit value.
  7. 7. The method as set forth in claim 4, wherein when the target correspondence is the first correspondence, the step of determining the temperature change state of the outdoor environment according to the current ambient temperature detected by the outdoor temperature sensor and the initial ambient temperature during the operation of the compressor further includes: And controlling the first throttling device to operate in an unthrottled state when the current ambient temperature is greater than or equal to the initial ambient temperature.
  8. 8. The method as set forth in claim 3, wherein said step of determining a temperature change state of said outdoor environment from a current ambient temperature detected by said outdoor temperature sensor and said initial ambient temperature during said compressor operation further comprises: Determining a target duration according to the outdoor heat exchanger temperature and the initial ambient temperature; The step of determining the temperature change state of the outdoor environment according to the current ambient temperature detected by the outdoor temperature sensor and the initial ambient temperature during the operation of the compressor includes: and under the condition that the running time length after the start of the compressor is greater than or equal to the target time length, determining the temperature change state of the outdoor environment according to the current environment temperature detected by the outdoor temperature sensor and the initial environment temperature.
  9. 9. The method of claim 8, wherein the step of determining a target time period from the outdoor heat exchanger temperature and the initial ambient temperature comprises: determining a first duration as the target duration under the condition that the temperature difference value between the initial ambient temperature and the temperature of the outdoor heat exchanger is larger than a first preset temperature difference; Determining a second duration as the target duration when the temperature difference value between the initial ambient temperature and the outdoor heat exchanger temperature is less than or equal to the first preset temperature difference and the initial ambient temperature is greater than or equal to the outdoor heat exchanger temperature; wherein the first duration is less than or equal to the second duration.
  10. 10. The method of any one of claims 1 to 9, wherein the step of defining the temperature detected by the outdoor temperature sensor when the compressor is not on as an initial ambient temperature, and controlling the heat pump system to operate such that the outdoor heat exchanger is in a condensed state and the indoor heat exchanger is in an evaporated state, further comprises: And executing the step of controlling the operation of the first throttling device and/or the compressor according to the outdoor heat exchanger temperature and the outdoor ambient temperature detected by the outdoor temperature sensor of the heat pump system under the condition that the initial ambient temperature is greater than the preset ambient temperature.
  11. 11. The method of claim 10, wherein prior to the step of controlling the operation of the first throttling device and/or the compressor based on the outdoor heat exchanger temperature and the outdoor ambient temperature sensed by the outdoor temperature sensor of the heat pump system, further comprising: And controlling the compressor to operate at a frequency less than a preset frequency under the condition that the initial ambient temperature is greater than the preset ambient temperature.
  12. 12. The heat pump system is characterized by comprising a control device and a refrigerant circulation loop, wherein the refrigerant circulation loop comprises a compressor, an indoor heat exchanger, a first throttling device and an outdoor heat exchanger which are connected in sequence; The first throttle device and the compressor are both connected to the control device, which comprises a memory, a processor and a computer program stored on the memory and executable on the processor, which computer program is configured to carry out the steps of the control method of the heat pump system according to any one of claims 1 to 11.
  13. 13. A storage medium, characterized in that the storage medium is a computer-readable storage medium, on which a computer program is stored, which computer program, when being executed by a processor, realizes the steps of the control method of the heat pump system according to any one of claims 1 to 11.

Description

Control method for heat pump system, and storage medium Technical Field The present application relates to the field of heat pump technologies, and in particular, to a control method of a heat pump system, and a storage medium. Background The heat pump system can be operated in a refrigeration mode to release cold to reduce the indoor temperature. The heat pump system generally detects the ambient temperature through a temperature sensor arranged on the external machine during refrigeration, and limits the operation of the compressor based on the ambient temperature so as to ensure the reliability. However, when the heat pump system is used in a high-temperature area, due to ground radiation, solar radiation and the like, the temperature sensor detected on the external machine can be much higher than the actual air temperature, which can cause the heat pump system to unnecessarily limit refrigeration output and even not start up, and the refrigeration effect of the heat pump system is affected. Disclosure of Invention The application mainly aims to provide a control method of a heat pump system, the heat pump system and a storage medium, and aims to ensure the reliability of the system and improve the refrigerating effect of the heat pump system. In order to achieve the above object, the present application provides a control method of a heat pump system, wherein a refrigerant circulation loop of the heat pump system includes a compressor, and an indoor heat exchanger, a first throttling device and an outdoor heat exchanger which are sequentially connected, the method includes: Controlling a heat pump system to operate so that the outdoor heat exchanger is in a condensation state and the indoor heat exchanger is in an evaporation state; The first throttling device and/or the compressor is/are controlled to operate according to an outdoor heat exchanger temperature and an outdoor ambient temperature detected by an outdoor temperature sensor of the heat pump system. In an embodiment, the refrigerant circulation loop further includes a refrigerant heat dissipation assembly and a second throttling device, the first throttling device, the refrigerant heat dissipation module, the first throttling device and the indoor heat exchanger are sequentially connected, the outdoor heat exchanger temperature is detected when the compressor is not opened, the temperature detected by the outdoor temperature sensor when the compressor is not opened is defined as an initial environment temperature, and the step of controlling the operation of the first throttling device according to the outdoor heat exchanger temperature and the outdoor environment temperature detected by the outdoor temperature sensor of the heat pump system includes: Controlling the first throttling device to adjust the operation opening according to the state parameter of the reliability of the heat pump system under the condition that the temperature difference value between the initial environment temperature and the temperature of the outdoor heat exchanger is larger than a first preset temperature difference; and controlling the first throttling device to operate in an unthrottled state under the condition that the temperature difference value of the initial environment temperature and the outdoor heat exchanger temperature is smaller than or equal to the first preset temperature difference and the initial environment temperature is larger than or equal to the outdoor heat exchanger temperature. In an embodiment, the outdoor heat exchanger temperature is detected when the compressor is not turned on, the temperature detected when the compressor is not turned on by the outdoor temperature sensor is defined as an initial ambient temperature, and the step of controlling the operation of the compressor according to the outdoor heat exchanger temperature and the initial ambient temperature includes: determining a target corresponding relation between a temperature change state of an outdoor environment and control parameters of the compressor according to the temperature of the outdoor heat exchanger and the initial environment temperature; In the running process of the compressor, determining the temperature change state of the outdoor environment according to the current environment temperature detected by the outdoor temperature sensor and the initial environment temperature; and controlling the compressor to adjust the operating frequency according to the temperature change state and the target corresponding relation. In an embodiment, the step of determining the target correspondence between the temperature change state of the outdoor environment and the control parameter of the compressor according to the outdoor heat exchanger temperature and the initial environment temperature includes: And determining a first corresponding relation as the target corresponding relation under the condition that the temperature difference value between the initial envi