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Air-cooled heat pump unit and its control method, device and system

An air-cooled heat pump and heating device technology, applied in refrigerators, refrigeration components, refrigeration and liquefaction, etc., can solve problems such as low-pressure protection and failure to start, and achieve the effects of avoiding low-voltage protection, ensuring normal start-up, and improving circulation volume

Active Publication Date: 2019-01-01
GREE ELECTRIC APPLIANCES INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The embodiment of the present invention provides an air-cooled heat pump unit and its control method, device and system, to at least solve the problem of frequent low-voltage protection when the existing air-cooled heat pump unit starts under the condition of low ambient temperature and low water temperature, and even cannot Technical issues with the status of the launch

Method used

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  • Air-cooled heat pump unit and its control method, device and system
  • Air-cooled heat pump unit and its control method, device and system
  • Air-cooled heat pump unit and its control method, device and system

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Embodiment 1

[0024] According to an embodiment of the present invention, a method embodiment of a control method for an air-cooled heat pump unit is provided. It should be noted that the steps shown in the flow chart of the accompanying drawings can be implemented in a computer system such as a set of computer-executable instructions and, although a logical order is shown in the flowcharts, in some cases the steps shown or described may be performed in an order different from that shown or described herein.

[0025] Optionally, the air-cooled heat pump unit may include: a bypass mechanism connected in parallel with the main circuit electronic expansion valve, and the bypass mechanism may include at least one of the following: a bypass solenoid valve, a capillary tube, and a bypass electronic expansion valve, and / or, The bypass mechanism is arranged between the inlet pipe and the exhaust pipe of the gas-liquid separator.

[0026] Specifically, the above-mentioned air-cooled heat pump unit m...

Embodiment 2

[0127] According to an embodiment of the present invention, a device embodiment of a control device for an air-cooled heat pump unit is provided.

[0128] Optionally, the air-cooled heat pump unit may include: a bypass mechanism connected in parallel with the main circuit electronic expansion valve, and the bypass mechanism may include at least one of the following: a bypass solenoid valve, a capillary tube, and a bypass electronic expansion valve, and / or, The bypass mechanism is arranged between the inlet pipe and the exhaust pipe of the gas-liquid separator.

[0129] Specifically, the above-mentioned air-cooled heat pump unit may be an air-cooled heat pump unit that increases enthalpy by injection.

[0130] In an alternative, such as figure 1 As shown, P1 is the suction pressure sensor, P2 is the injection enthalpy pressure sensor, P3 is the exhaust pressure sensor; T1 is the suction temperature sensor, T2 is the injection enthalpy temperature sensor, T3 is the exhaust temp...

Embodiment 3

[0142] According to an embodiment of the present invention, a system embodiment of a control system of an air-cooled heat pump unit is provided.

[0143] Figure 8 is a schematic diagram of a control system of an air-cooled heat pump unit according to an embodiment of the present invention, such as Figure 8 As shown, the system includes:

[0144] The bypass mechanism 81 is connected in parallel with the main circuit electronic expansion valve.

[0145] Optionally, in the above-mentioned embodiments of the present invention, the bypass mechanism may include at least one of the following: a bypass solenoid valve, a capillary tube, and a bypass electronic expansion valve, and / or, the bypass mechanism is arranged in the inlet pipe of the gas-liquid separator and the exhaust pipe.

[0146] Specifically, the above-mentioned air-cooled heat pump unit may be an air-cooled heat pump unit that increases enthalpy by injection.

[0147] In an alternative, such as figure 1 As shown, ...

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Abstract

The invention discloses an air-cooled heat pump unit and its control method, device and system. Wherein, the control method of the air-cooled heat pump unit includes: obtaining the suction pressure detected by the suction pressure sensor; comparing the suction pressure with the first preset suction pressure; If the received suction pressure is less than or equal to the first preset suction pressure, the bypass mechanism is opened, and the opening of the main circuit electronic expansion valve is adjusted to the preset opening. The invention solves the technical problem that when the existing air-cooled heat pump unit is started under the condition of low ambient temperature and low water temperature, frequent low-voltage protection occurs, and even the situation of failure to start occurs.

Description

technical field [0001] The invention relates to the field of control of an air-cooled heat pump unit, in particular to an air-cooled heat pump unit and a control method, device and system thereof. Background technique [0002] The air source heat pump absorbs the low-temperature heat energy in the air and converts it into high-temperature heat energy through the work of the compressor. As a high-efficiency, energy-saving and environmentally friendly heating technology, air source heat pumps have been more and more used in my country. At present, most of the ordinary air-cooled air-source heat pumps have a minimum ambient temperature of -15°C for heating operation. In order to broaden the operating range of air-cooled heat pumps for heating, air injection technology is often used to increase enthalpy. The heating operation range of the air-cooled heat pump using the air injection enthalpy increasing technology can reach -25℃~-30℃. [0003] The air-cooled heat pump unit used...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F25B41/06F25B49/02F25B41/34
CPCF25B49/02F25B2600/2513F25B41/31Y02B30/70
Inventor 魏峰张恩泉王传华孙思林海东赵朋举赵普李华本李桂强
Owner GREE ELECTRIC APPLIANCES INC
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