CN-122015326-A - Refrigerating equipment and control method thereof

CN122015326ACN 122015326 ACN122015326 ACN 122015326ACN-122015326-A

Abstract

The application discloses refrigeration equipment and a control method thereof, and belongs to the technical field of refrigeration equipment. The refrigeration equipment comprises a controller and a refrigeration system, wherein the refrigeration system comprises a compressor, a condenser, a refrigeration branch, a bypass valve and a controller, the inlet of the refrigeration evaporator is connected with the outlet of the condenser, the outlet of the refrigeration evaporator is communicated with the inlet of the refrigeration evaporator, the bypass valve is connected between the outlet of the compressor and the inlet of the refrigeration evaporator, the controller is configured to control the compressor to keep working under the condition that defrosting conditions are achieved, the condenser and the refrigeration evaporator are controlled to be communicated for a first target duration, then the inlet of the condenser and the inlet of the refrigeration evaporator are controlled to be communicated, the inlet of the condenser and the inlet of the refrigeration evaporator are controlled to be disconnected for a second target duration, and then the bypass valve is controlled to be opened. The application can reduce the risk of damage to the compressor caused by the backflow of the liquid refrigerant into the compressor by reducing the liquid refrigerant circulating in the loop during defrosting.

Inventors

HAN CONG
LI FENG
JI LISHENG
QI FEIFEI

Assignees

青岛海尔特种制冷电器有限公司
海尔智家股份有限公司

Dates

Publication Date: 20260512
Application Date: 20250918

Claims (10)

1. A refrigeration appliance, comprising: a controller and a refrigeration system, the refrigeration system comprising: A compressor; a condenser, an inlet of which is communicated with an outlet of the compressor; a freezing branch, wherein an inlet of a freezing evaporator in the freezing branch is connected with an outlet of the condenser, and the outlet of the freezing evaporator is communicated with an inlet of the compressor; A refrigeration branch, wherein an inlet of a refrigeration evaporator in the refrigeration branch is connected with an outlet of the condenser, and the outlet of the refrigeration evaporator is communicated with an inlet of the freezing evaporator; a bypass valve connected between an outlet of the compressor and an inlet of the freeze evaporator; And the controller is configured to control the compressor to keep working under the condition that defrosting conditions are achieved, control the condenser to be communicated with the refrigeration evaporator for a first target duration, control the bypass valve to be disconnected for a second target duration between the inlet of the condenser and the inlet of the refrigeration evaporator, between the inlet of the condenser and the inlet of the refrigeration evaporator and the bypass valve, and control the bypass valve to be opened, wherein the compressor is communicated with the refrigeration evaporator through the bypass valve.
2. The refrigeration appliance of claim 1 wherein the refrigeration limb further comprises a refrigeration capillary, the inlet of the refrigeration capillary being connected to the outlet of the condenser, the outlet of the refrigeration capillary being in communication with the inlet of the refrigeration evaporator, and the outlet of the refrigeration evaporator being connected between the refrigeration capillary and the refrigeration evaporator; The refrigerating branch also comprises a refrigerating capillary, an inlet of the refrigerating capillary is connected with an outlet of the condenser, and an outlet of the refrigerating capillary is communicated with an inlet of the refrigerating evaporator.
3. The refrigeration apparatus of claim 1, wherein the refrigeration system further comprises a three-way valve, a first port of the three-way valve being in communication with the outlet of the condenser, a second port of the three-way valve being in communication with the refrigeration circuit, a third port of the three-way valve being in communication with the refrigeration circuit, the three-way valve being configured such that at least one of the second port and the third port is in selective communication with the first port.
4. A refrigeration device as recited in claim 3, wherein the refrigeration system further includes a dry filter connected between the condenser and the first port of the three-way valve.
5. The refrigeration appliance of any one of claims 1 to 4 wherein the refrigeration system further includes a refrigeration fan and a condensing fan, each configured to be selectively openable in a defrost mode.
6. The refrigeration appliance of any one of claims 1-4 wherein the controller is configured to determine the first target duration and the second target duration based on operating information of the compressor and a refrigerant charge of the refrigeration system.
7. A control method applied to a refrigeration apparatus according to any one of claims 1 to 6, comprising: controlling the compressor to keep working and controlling the condenser to be communicated with the refrigeration evaporator under the condition that the defrosting condition is determined to be achieved; After the first target duration is reached, controlling the bypass valve to be disconnected between the outlet of the condenser and the inlet of the refrigeration evaporator, between the outlet of the condenser and the inlet of the refrigeration evaporator and between the outlet of the condenser and the inlet of the refrigeration evaporator; And after the second target duration is reached, controlling the bypass valve to be opened.
8. The control method of claim 7, wherein, in the case where the refrigeration system includes a three-way valve, the controlling the compressor to remain in operation in the case where a defrosting condition is reached, controlling the condenser to remain in communication with the refrigerated evaporator, includes: and controlling the compressor to run, and controlling the first valve port of the three-way valve to be communicated with the second valve port of the three-way valve.
9. The control method according to claim 7, wherein, in the case where the refrigeration system includes a three-way valve, the controlling between the inlet of the condenser and the inlet of the refrigeration evaporator, between the inlet of the condenser and the inlet of the freezing evaporator, and the bypass valve to remain open after the first target period of time is reached, includes: after the time for communicating the condenser with the refrigeration evaporator reaches the first target duration, controlling the first valve port of the three-way valve to be not communicated with the second valve port of the three-way valve, controlling the third valve port of the three-way valve to be not communicated with the second valve port of the three-way valve, and controlling the bypass valve to be kept disconnected.
10. The control method according to claim 7, wherein the controlling the bypass valve to open after the second target period is reached includes: And controlling the on-off electromagnetic valve to be opened after the time between the inlet of the condenser and the inlet of the refrigerating evaporator, between the inlet of the condenser and the inlet of the freezing evaporator and the time when the bypass valve is kept to be disconnected reaches the second target duration.

Description

Refrigerating equipment and control method thereof Technical Field The application belongs to the technical field of refrigeration equipment, and particularly relates to refrigeration equipment and a control method thereof. Background In the related art, when the refrigerator operates in the thermal defrosting mode, the refrigerating system changes the flow direction of the refrigerant, and the high-temperature and high-pressure gaseous refrigerant is reversely introduced into the evaporator to quickly melt the frost layer accumulated on the surface of the evaporator, but larger temperature and pressure changes are generated in the evaporator and a connecting pipeline thereof, a large amount of liquid refrigerant generated by defrosting cannot be completely vaporized, and excessive liquid refrigerant is easily migrated and flows back to the inside of the compressor under the action of the system pressure difference, so that the risk of damage of the compressor due to the liquid impact phenomenon exists in an improvement space. Disclosure of Invention The present application is directed to solving at least one of the technical problems existing in the related art. Therefore, the application provides the refrigeration equipment and the control method thereof, which can reduce the risk of damaging the compressor caused by the backflow of the liquid refrigerant into the compressor. In a first aspect, the present application provides a refrigeration appliance comprising: a controller and a refrigeration system, the refrigeration system comprising: A compressor; a condenser, an inlet of which is communicated with an outlet of the compressor; a freezing branch, wherein an inlet of a freezing evaporator in the freezing branch is connected with an outlet of the condenser, and the outlet of the freezing evaporator is communicated with an inlet of the compressor; A refrigeration branch, wherein an inlet of a refrigeration evaporator in the refrigeration branch is connected with an outlet of the condenser, and the outlet of the refrigeration evaporator is communicated with an inlet of the freezing evaporator; a bypass valve connected between an outlet of the compressor and an inlet of the freeze evaporator; And the controller is configured to control the compressor to keep working under the condition that defrosting conditions are achieved, control the condenser to be communicated with the refrigeration evaporator for a first target duration, control the bypass valve to be disconnected for a second target duration between the inlet of the condenser and the inlet of the refrigeration evaporator, between the inlet of the condenser and the inlet of the refrigeration evaporator and the bypass valve, and control the bypass valve to be opened, wherein the compressor is communicated with the refrigeration evaporator through the bypass valve. In the technical scheme, by reducing the liquid refrigerant circulating in the loop during defrosting, the risk of damage to the compressor caused by backflow of the liquid refrigerant into the compressor can be reduced. According to one embodiment of the application, the freezing branch further comprises a freezing capillary, the inlet of the freezing capillary is connected with the outlet of the condenser, the outlet of the freezing capillary is communicated with the inlet of the freezing evaporator, and the outlet of the freezing evaporator is connected between the freezing capillary and the freezing evaporator; The refrigerating branch also comprises a refrigerating capillary, an inlet of the refrigerating capillary is connected with an outlet of the condenser, and an outlet of the refrigerating capillary is communicated with an inlet of the refrigerating evaporator. In the technical scheme, the outlet of the refrigeration evaporator is connected between the freezing capillary tube and the freezing evaporator, which is beneficial to improving the energy efficiency utilization rate. According to one embodiment of the application, the refrigeration system further comprises a three-way valve, a first valve port of the three-way valve is communicated with the outlet of the condenser, a second valve port of the three-way valve is communicated with the refrigeration branch, a third valve port of the three-way valve is communicated with the freezing branch, and the three-way valve is configured so that at least one of the second valve port and the third valve port is selectively communicated with the first valve port. According to one embodiment of the application, the refrigeration system further comprises: And the drying filter is connected between the condenser and the first valve port of the three-way valve. In the above technical solution, the dry filter is located upstream of the refrigeration capillary tube and the freezing capillary tube, and the dry filter is mainly used for removing moisture in the refrigerant, so as to reduce the fault risk of the refrigeration capillary tube and