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CN-116398982-B - Refrigerating system, control method of refrigerating system and air conditioner

CN116398982BCN 116398982 BCN116398982 BCN 116398982BCN-116398982-B

Abstract

The invention provides a refrigerating system, a control method of the refrigerating system and an air conditioner. The refrigerating system comprises a compressor, an indoor heat exchanger and an outdoor heat exchanger, wherein an exhaust port of the compressor is connected with the indoor heat exchanger, the indoor heat exchanger is connected with the outdoor heat exchanger, the outdoor heat exchanger is connected with an air suction port of the compressor, a defrosting heat exchange device is provided with a refrigerant inlet and a refrigerant outlet, the refrigerant inlet of the defrosting heat exchange device is connected between the exhaust port of the compressor and the indoor heat exchanger in an on-off mode, the refrigerant outlet of the defrosting heat exchange device is connected between the outdoor heat exchanger and the air suction port of the compressor, and at least part of the defrosting heat exchange device is arranged on the inner side of an outdoor coil of the outdoor heat exchanger and used for heating the refrigerant in the outdoor coil and realizing defrosting. The refrigerating system ensures that the defrosting process is finished in a non-stop state, and the indoor side heating is normally carried out in the defrosting process, so that the defect of indoor temperature reduction in the traditional defrosting mode is avoided, and the use experience of a user is improved.

Inventors

  • GE WENKAI
  • DU CHAO

Assignees

  • 青岛海尔空调器有限总公司
  • 青岛海尔空调电子有限公司
  • 青岛海尔智能技术研发有限公司
  • 海尔智家股份有限公司

Dates

Publication Date
20260508
Application Date
20230414

Claims (8)

  1. 1.A refrigeration system, comprising: The device comprises a compressor, an indoor heat exchanger and an outdoor heat exchanger, wherein an exhaust port of the compressor is connected with the indoor heat exchanger, the indoor heat exchanger is connected with the outdoor heat exchanger, and the outdoor heat exchanger is connected with an air suction port of the compressor; The defrosting heat exchange device is provided with a refrigerant inlet and a refrigerant outlet, the refrigerant inlet of the defrosting heat exchange device is connected between the exhaust port of the compressor and the indoor heat exchanger in an on-off mode, and the refrigerant outlet of the defrosting heat exchange device is connected between the outdoor heat exchanger and the air suction port of the compressor; At least part of the defrosting heat exchange device is arranged on the inner side of an outdoor coil of the outdoor heat exchanger and is used for heating a refrigerant in the outdoor coil and defrosting; The defrosting heat exchange device comprises a bypass pipeline, a defrosting heat exchange pipeline and a throttling piece which are sequentially connected, wherein an inlet of the bypass pipeline forms a refrigerant inlet, an outlet of the throttling piece forms a refrigerant outlet, and the defrosting heat exchange pipeline is arranged on the inner side of the outdoor coil and is used for heating a refrigerant in the outdoor coil and realizing defrosting; when the air conditioner enters a defrosting mode, an inlet of the bypass pipeline is communicated with an exhaust port of the compressor, a high-temperature refrigerant flowing out of the exhaust port of the compressor is divided into two paths, one path of high-temperature refrigerant sequentially flows through the indoor heat exchanger and the throttling device and then becomes a low-temperature refrigerant to flow into the outdoor heat exchanger, and the other path of high-temperature refrigerant enters the defrosting heat exchange pipeline through the bypass pipeline; The throttling element comprises an electronic expansion valve with adjustable opening; the control device of the air conditioner is used for acquiring the temperature of an indoor coil of the indoor heat exchanger, comparing the priority levels of a heating mode and a defrosting mode of the air conditioner, determining that the temperature of the indoor coil is lower than the target heating temperature, the priority level of the heating mode is higher than the priority level of the defrosting mode, and controlling the opening degree of the electronic expansion valve to be reduced until the temperature of the indoor coil reaches the target heating temperature, wherein the outdoor coil is a hollow annular pipeline, a refrigerant channel is defined between the outer peripheral wall and the inner peripheral wall of the outdoor coil, a hollow channel is defined by the inner peripheral wall of the outdoor coil, and the defrosting heat exchange pipeline is arranged in the hollow channel and is tightly attached to the outdoor coil.
  2. 2. The refrigerant system as set forth in claim 1, wherein a refrigerant channel is formed in said outdoor coil, said defrost heat exchange line being disposed within said refrigerant channel; And be equipped with the intercommunication on the pipe wall of outdoor coil the first trompil and the second trompil of refrigerant passageway, the bypass line stretches into in the first trompil in order to connect defrosting heat exchange line, the throttling element stretches into in the second trompil in order to connect defrosting heat exchange line.
  3. 3. The refrigerant system as set forth in claim 2, wherein a first seal is disposed between said first opening and said bypass line, and a second seal is disposed between said second opening and said restriction.
  4. 4. The refrigeration system of claim 1, wherein the defrost heat exchange line extends in a direction of extension of the outdoor coil and wherein a total length of the defrost heat exchange line is greater than or equal to a total length of the outdoor coil.
  5. 5. The refrigeration system as recited in any one of claims 1 to 4 wherein said throttle is a capillary tube, an inlet of said capillary tube being connected to said defrost heat exchange line, an outlet of said capillary tube forming said refrigerant outlet and being connected to an intake of said compressor; Or the throttling element is a throttling pipeline provided with a throttling valve, and the opening degree of the throttling valve can be adjusted.
  6. 6. The refrigerant system as set forth in any one of claims 1 to 4, wherein a center axis of said outdoor coil and a center axis of said defrost heat exchange line coincide with each other.
  7. 7. A control method based on the refrigeration system according to any one of claims 1 to 6, comprising: acquiring a detection temperature of a defrosting sensor arranged on the outdoor heat exchanger; determining that the detection temperature of the defrosting sensor is lower than a first set temperature, entering a defrosting mode, and exiting the defrosting mode after the detection temperature of the defrosting sensor is higher than a second set temperature; and in the defrosting mode, controlling the refrigerant inlet of the defrosting heat exchange device to be communicated with the exhaust port of the compressor.
  8. 8. An air conditioner, comprising: a refrigeration system as claimed in any one of claims 1 to 6.

Description

Refrigerating system, control method of refrigerating system and air conditioner Technical Field The invention relates to the technical field of electric appliances, in particular to a refrigerating system, a control method of the refrigerating system and an air conditioner. Background In the related art, when an air conditioner heats in winter, the outdoor side heat exchanger is easy to frost due to lower outdoor side temperature. The frosting will cause the fin to be blocked, the air quantity is reduced, the heat exchange thermal resistance is increased, the heat exchange effect is poor, and the heating effect of the whole machine is further poor. The existing method is to shut down and defrost in the way of reversing the four-way valve, heating the outdoor heat exchanger and refrigerating the indoor heat exchanger. When the outdoor heat exchanger frosts to a certain extent, the compressor is controlled to stop, the four-way valve is switched over, the compressor is started to run, after defrosting is finished, the compressor is stopped, the four-way valve is switched over again, and then the compressor is started to finish the whole defrosting process. Above-mentioned current shut down defrosting mode, when defrosting, the indoor fan of air conditioner is not running, and the air conditioner can't normally heat under the defrosting mode promptly, and the temperature in the whole room can be great decline to lead to human travelling comfort to descend, in addition, in the defrosting in-process, current defrosting mode needs four-way valve switching-over 2 times, and need to shut down the compressor, thereby cause entire system's energy efficiency relatively poor. Disclosure of Invention The invention provides a refrigerating system, a control method of the refrigerating system and an air conditioner, which are used for solving the defects in the prior art, and realizing the following technical effects that the defrosting process is finished in a non-stop state, and the indoor side heating is normally carried out in the defrosting process, so that the defect of indoor temperature drop in the traditional defrosting mode is avoided, and the use experience of a user is improved. An embodiment of a refrigeration system according to a first aspect of the present invention includes: The device comprises a compressor, an indoor heat exchanger and an outdoor heat exchanger, wherein an exhaust port of the compressor is connected with the indoor heat exchanger, the indoor heat exchanger is connected with the outdoor heat exchanger, and the outdoor heat exchanger is connected with an air suction port of the compressor; The defrosting heat exchange device is provided with a refrigerant inlet and a refrigerant outlet, the refrigerant inlet of the defrosting heat exchange device is connected between the exhaust port of the compressor and the indoor heat exchanger in an on-off mode, and the refrigerant outlet of the defrosting heat exchange device is connected between the outdoor heat exchanger and the air suction port of the compressor; at least part of the defrosting heat exchange device is arranged on the inner side of an outdoor coil of the outdoor heat exchanger and used for heating a refrigerant in the outdoor coil and realizing defrosting. According to one embodiment of the invention, the defrosting heat exchange device comprises a bypass pipeline, a defrosting heat exchange pipeline and a throttling element which are connected in sequence; The inlet of the bypass pipeline forms the refrigerant inlet, the outlet of the throttling piece forms the refrigerant outlet, and the defrosting heat exchange pipeline is arranged on the inner side of the outdoor coil pipe and is used for heating the refrigerant in the outdoor coil pipe and realizing defrosting. According to one embodiment of the invention, a refrigerant channel is formed in the outdoor coil, and the defrosting heat exchange pipeline is arranged in the refrigerant channel; And be equipped with the intercommunication on the pipe wall of outdoor coil the first trompil and the second trompil of refrigerant passageway, the bypass line stretches into in the first trompil in order to connect defrosting heat exchange line, the throttling element stretches into in the second trompil in order to connect defrosting heat exchange line. According to one embodiment of the invention, a first seal is provided between the first opening and the bypass line, and a second seal is provided between the second opening and the restriction. According to one embodiment of the invention, the outdoor coil is a hollow annular tube defining a refrigerant passage therebetween, and the inner peripheral wall of the outdoor coil defines a hollow passage within which the defrost heat exchange tube is mounted. According to one embodiment of the present invention, the defrosting heat exchange line extends in an extending direction of the outdoor coil, and a total length of the defrosting heat ex