CN-116558199-B - Cold accumulation mechanism, constant temperature refrigerator and refrigerator defrosting control method

CN116558199BCN 116558199 BCN116558199 BCN 116558199BCN-116558199-B

Abstract

The invention relates to the technical field of cold energy storage, and provides a cold accumulation mechanism which comprises a coil box, an air inlet pipe, an air outlet pipe, an air exhaust pipe and a cold accumulation piece, wherein the coil box is provided with two ports, the two ports are respectively connected with the air inlet pipe and the air exhaust pipe, one pipe orifice of the air inlet pipe is connected with the coil box, the other pipe orifice of the air inlet pipe is communicated with an evaporator chamber and is used for sucking gas in the evaporator chamber and sending the gas into the coil box, one pipe orifice of the air exhaust pipe is connected with the coil box, the other pipe orifice of the air exhaust pipe is communicated with the evaporator chamber and is used for sending the gas in the coil box back to the evaporator chamber, and the cold accumulation piece is arranged in the coil box and is used for carrying out heat exchange with the gas entering the coil box. Therefore, the invention is arranged independently of the evaporator chamber through the cold accumulation mechanism, and the defrosting process is not affected. After defrosting is finished, dry and cold gas is sent back to the evaporator chamber, so that the temperature in the chamber is promoted to be rapidly reduced, and the temperature fluctuation is reduced. And the defrosting period is obviously prolonged, and the defrosting frequency is reduced. The invention also provides a constant temperature refrigerator based on the cold accumulation mechanism and a defrosting control method.

Inventors

LIU LEIXUN
ZHU ZHAOYI
MA GANG
CHEN XINLONG
LI XIANBAO
LIU XIA

Assignees

澳柯玛股份有限公司

Dates

Publication Date: 20260505
Application Date: 20230411

Claims (10)

1. A cold accumulation mechanism, characterized by comprising The coil pipe box is provided with two ports, and the two ports are respectively connected with an air inlet pipe and an air outlet pipe; one pipe orifice of the air inlet pipe is connected with the coil pipe box, the other pipe orifice of the air inlet pipe is communicated with the evaporator chamber and is used for sucking gas in the evaporator chamber and sending the gas into the coil pipe box; One pipe orifice of the exhaust pipe is connected with the coil box, and the other pipe orifice of the exhaust pipe is communicated with the evaporator chamber and is used for sending gas in the coil box back to the evaporator chamber; the cold accumulation piece is arranged in the coil box and is used for carrying out heat exchange with the gas entering the coil box; The gas inlet and outlet modes of the cold accumulation mechanism comprise: When the evaporator is normally refrigerated, the air inlet pipe sucks air in the evaporator cavity and sends the air into the coil box; when the evaporator is frosted, the air inlet pipe and the air outlet pipe stop sucking and blowing; And after defrosting of the evaporator is finished, the air inlet pipe sucks air in the evaporator cavity and sends the air into the coil box, and the air exchanges heat with the cold accumulation piece and then is sent back to the evaporator cavity through the exhaust pipe.
2. The cold accumulation mechanism of claim 1, wherein a circulating fan is respectively arranged in the pipe orifices of the air inlet pipe and the air outlet pipe communicated with the evaporator chamber.
3. The cold accumulation mechanism of claim 1, wherein the coil housing includes a plurality of straight portions and bent portions, the straight portions and bent portions being sequentially cross-connected to form a "serpentine" configuration.
4. The cold accumulation mechanism according to claim 3, wherein the cold accumulation member has a plate-like structure and has a direction consistent with that of the coil box, and the coil box has a rectangular cross-sectional shape and a plurality of cold accumulation members having plate-like structures arranged in parallel.
5. The cold accumulation mechanism according to claim 1, wherein a plurality of drain holes are formed in the bottom plate of the coil box, a drain tank is arranged below the bottom plate, and a water receiving box communicated with the drain tank is further arranged on the cold accumulation mechanism.
6. The cold accumulation mechanism according to claim 5, wherein the water receiving box is connected with a plurality of water guide branch pipes which are also communicated with the water discharge groove, and two port positions of the coil box are respectively provided with a water discharge bucket which is connected with the water discharge groove and the water receiving box.
7. The cold accumulation mechanism of claim 1, wherein a heating tube is further provided on the lower surface of the bottom plate of the coil box.
8. The cold accumulation mechanism according to claim 1, wherein heat insulation plates are respectively arranged on the upper side and the lower side of the coil box, and the heat insulation plates are VIP heat insulation plates.
9. A constant temperature refrigerator comprises an inner container, wherein an evaporator chamber is arranged at the rear part of the inner container, and the constant temperature refrigerator is characterized in that a coil pipe box of the cold accumulation mechanism according to any one of claims 1-8 is arranged at the outer side of the bottom of the inner container, and an air inlet pipe and an air outlet pipe of the cold accumulation mechanism are respectively communicated with the evaporator chamber from two sides.
10. A refrigerator defrosting control method is characterized by comprising the cold accumulation mechanism according to any one of claims 1-8, Evaporator defrosting stage: the air inlet pipe and the air outlet pipe of the cold accumulation mechanism stop sucking and blowing; After defrosting of the evaporator is finished: The air inlet pipe of the cold accumulation mechanism pumps the air in the evaporator cavity into the coil pipe box, and the air outlet pipe sends the air in the coil pipe box back to the evaporator cavity until the temperature of the air in the air outlet pipe is not lower than the temperature in the evaporator cavity; Evaporator normal refrigeration phase: judging whether the temperature T 1 in the evaporator cavity and the temperature T 2 in the refrigerating cavity are stable or not; when both T 1 and T 2 are stable, the air inlet pipe of the cold accumulation mechanism pumps the air in the evaporator cavity into the coil pipe box, and the air outlet pipe returns the air in the coil pipe box to the evaporator cavity until the temperature of the air in the coil pipe box reaches or is lower than a preset value; When either one of T 1 and T 2 is unstable, the air inlet pipe and the air outlet pipe of the cold accumulation mechanism stop sucking and blowing.

Description

Cold accumulation mechanism, constant temperature refrigerator and refrigerator defrosting control method Technical Field The invention belongs to the technical field of cold energy storage, and particularly relates to a cold accumulation mechanism. Background The existing refrigerator needs to defrost the evaporator periodically to ensure the heat exchange efficiency. The temperature of the evaporator chamber is increased during defrosting, and the temperature in the freezing chamber is increased, so that larger temperature fluctuation is generated in the freezing chamber, and the freshness of the stored food materials is not facilitated. At present, a technology for reducing temperature fluctuation during defrosting appears, such as a scheme disclosed in China patent 202123400800.7, wherein a cold storage device body is arranged in a refrigerating chamber of a constant temperature refrigerator, and convection heat exchange is realized by utilizing specific gravity difference of hot and cold gases, so that temperature fluctuation during defrosting is reduced. The cold accumulation device body is arranged close to the evaporator, the fluctuation range of the cold accumulation device body is reduced by reducing the temperature during defrosting, but the defrosting time is prolonged and the defrosting efficiency is reduced due to the reduction of the defrosting temperature. The cold storage device adopts natural convection heat exchange of hot and cold gases, has low heat exchange efficiency, adopts liquid refrigerant to store cold, has large whole volume and inevitably occupies the space of a refrigerating chamber. In summary, it is clear that the prior art has inconvenience and defects in practical use, so that improvement is needed. Disclosure of Invention The invention solves the technical problem that the heat exchange efficiency of the cold accumulation device is low. The cold accumulation mechanism is independent of the evaporator chamber, so that the defrosting process is not affected. After defrosting is finished, dry and cold gas is sent back to the evaporator chamber, so that the temperature in the chamber is promoted to be rapidly reduced, and the temperature fluctuation is reduced. And the defrosting period is obviously prolonged, and the defrosting frequency is reduced. In order to solve the problems, the invention provides a cold accumulation mechanism, which comprises a coil pipe box, a cooling device and a cooling device, wherein the coil pipe box is provided with two ports, and the two ports are respectively connected with an air inlet pipe and an air outlet pipe; one pipe orifice of the air inlet pipe is connected with the coil pipe box, the other pipe orifice of the air inlet pipe is communicated with the evaporator chamber and is used for sucking gas in the evaporator chamber and sending the gas into the coil pipe box; One pipe orifice of the exhaust pipe is connected with the coil box, and the other pipe orifice of the exhaust pipe is communicated with the evaporator chamber and is used for sending gas in the coil box back to the evaporator chamber; the cold accumulation piece is arranged in the coil box and is used for carrying out heat exchange with the gas entering the coil box. According to the cold accumulation mechanism, the pipe orifices of the air inlet pipe and the air outlet pipe, which are communicated with the evaporator chamber, are respectively provided with a circulating fan. According to the cold accumulation mechanism provided by the invention, the coil pipe box comprises a plurality of straight line parts and bending parts, and the straight line parts and the bending parts are sequentially and crosswise connected to form a serpentine structure. According to the cold accumulation mechanism, the cold accumulation pieces are of plate-shaped structures, the trend of the cold accumulation pieces is consistent with that of the coil pipe box, the section of the coil pipe box is rectangular, and a plurality of cold accumulation pieces of plate-shaped structures which are arranged in parallel are arranged in the coil pipe box. According to the cold accumulation mechanism, the bottom plate of the coil pipe box is provided with a plurality of drain holes, the drain groove is arranged below the bottom plate, and the cold accumulation mechanism is also provided with the water receiving box communicated with the drain groove. According to the cold accumulation mechanism, the water receiving box is connected with the plurality of water guide branch pipes which are also communicated with the water discharge grooves, two port positions of the coil pipe box are respectively provided with the water discharge hoppers, and the water discharge hoppers are connected with the water discharge grooves and the water receiving box. According to the cold accumulation mechanism, a heating pipe is further arranged on the lower surface of the bottom plate of the coil box. According to the cold accumul