Multi-flow-path condensation waste heat defrosting system

Abstract

The invention relates to the field of refrigerating systems, in particular to a multi-flow-path condensation waste heat defrosting system which comprises a refrigerating system composed of a compressor, a condenser, a throttling pipe fitting and an evaporator, the condenser is arranged in a heat storage water tank, and a refrigerating medium is arranged in the heat storage water tank; a pipeline of the evaporator is composed of a sleeve, a refrigerant flows in an outer pipe of the sleeve, and a secondary refrigerant flows in an inner pipe of the sleeve. The heat storage water tank is connected with an inner pipe of the sleeve through a connecting pipe, a water pump is further arranged on the connecting pipe, and a control system is used for controlling the water pump. The heat of the condenser can be fully stored and used for defrosting, and compared with electric heating defrosting, the electric heating defrosting method is a safe and energy-saving innovation.

Description

Technical Field

[0001] The present invention relates to the field of refrigeration systems, and in particular to a multi-flow path condensation waste heat defrosting system. Background Art

[0002] In traditional household refrigerators, freezers and deep freezers, the refrigeration system is basically composed of a compressor, condenser, throttling pipe and evaporator. The refrigerant absorbs heat and evaporates into gas in the evaporator under certain pressure conditions, and is recovered in the condenser to be re-liquefied, and then absorbs heat and evaporates again. This change is usually repeated in a cycle to achieve the purpose of cooling.

[0003] Among them, the most common cooling methods are direct cooling and air cooling. Direct cooling uses an evaporator placed close to the outer wall of the refrigerator and in contact with the drawer. This direct-contact cooling method absorbs heat from the refrigerator through a continuous flow of refrigerant, achieving cooling. This direct-contact cooling method is passive, relying on the pressure difference between hot and cold air inside the refrigerator to generate convection, ultimately lowering the temperature inside the entire refrigerator. Air cooling, on the other hand, uses a dedicated fan and air duct designed on the evaporator to blow cold air into the refrigerator, creating forced air convection and ultimately achieving a cooling effect. This is an active cooling method.

[0004] Due to the presence of water vapor inside the refrigerator, in a low-temperature environment, the above two refrigeration methods will cause frost problems at the evaporator position, which requires regular defrosting to ensure normal use of the refrigerator.

[0005] Direct cooling, such as in smaller refrigerators, requires users to regularly power down the unit to defrost, which adds to the inconvenience. For air cooling, such as in larger refrigerators, existing technology defrosts by adding a heating tube to the evaporator. While this method solves the frosting problem to some extent, it also increases energy consumption, which is inconsistent with the concept of low-carbon and environmentally friendly development. Summary of the Invention

[0006] The purpose of the present invention is to overcome the defects of the above-mentioned prior art and provide a more energy-saving and efficient multi-flow condensation waste heat defrosting system.

[0007] In order to solve the above technical problems, the present invention adopts the following technical solutions:

[0008] A multi-flow condensing waste heat defrosting system includes a refrigeration system consisting of a compressor, condenser, throttling pipe, and evaporator. The condenser is placed in a hot water storage tank, which contains a brine. The evaporator's piping consists of a casing, with the refrigerant flowing through the outer tube and the brine flowing through the inner tube. The hot water storage tank and the inner tube are connected by a connecting pipe, which is also equipped with a water pump. A control system is connected to the water pump.

[0009] Preferably, the coolant is ethylene glycol.

[0010] Preferably, the control system includes a single chip microcomputer and a temperature sensor.

[0011] Compared with the defrosting method of the prior art, the present invention has the following advantages:

[0012] 1. After placing the condenser in the hot water storage tank, the condenser adopts liquid cooling, and the heat exchange efficiency is further improved.

[0013] 2. The system can store the heat generated by the condenser and use it in the defrosting process of the evaporator, achieving zero heat loss.

[0014] 3. The evaporator adopts the form of a tube, and the hot fluid can fully exchange heat with the evaporator in the tube, which increases the heat exchange area and improves the heat exchange efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a flow chart of the multi-flow path condensation waste heat defrosting system of the present invention. DETAILED DESCRIPTION

[0016] See attached Figure 1 As shown, a multi-flow condensing waste heat defrosting system includes a refrigeration system consisting of a compressor 1, a condenser 2, a throttling pipe 5, and an evaporator 4. The condenser 2 is placed in a hot water storage tank 3, which is provided with a brine. The evaporator 4 has piping consisting of a casing, with the refrigerant flowing through the outer tube of the casing and the brine flowing through the inner tube. The hot water storage tank 3 is connected to the inner tube of the casing by a connecting pipe, which is also provided with a water pump 6. A control system is connected to the water pump 6.

[0017] Preferably, the coolant is ethylene glycol.

[0018] Preferably, the control system includes a single chip microcomputer and a temperature sensor.

[0019] Here’s how it works:

[0020] Regardless of whether it is a refrigerator in a refrigeration mode or an air-cooling mode, its refrigeration system includes a refrigeration system composed of a compressor 1, a condenser 2, a throttling pipe 5, and an evaporator 4. This refrigeration system is a prior art.

[0021] The present invention provides a multi-flow condensation waste heat defrost system, wherein a heat storage tank 3 is a closed, insulated box structure filled with a coolant, such as ethylene glycol. The condenser 2 in the refrigeration system is completely placed within the heat storage tank 3. During operation, the condenser 2 needs to dissipate heat. Since the condenser 2 is placed within the glycol-filled heat storage tank 3, the condenser 2 transfers heat to the glycol coolant.

[0022] The pipeline of the evaporator 4 described in the present invention is composed of a sleeve. The so-called sleeve is a large tube wrapped in a small tube. The large tube is the outer tube and the small tube is the inner tube. The refrigerant flows in the large tube and the coolant ethylene glycol flows in the small tube. The inner tube of the sleeve of the present invention is connected in series with the hot water storage tank 3 through a connecting pipe. A power equipment water pump 6 is also provided on the connecting pipe between the hot water storage tank 3 and the inner tube. When the water pump 6 is started, the coolant ethylene glycol after heat exchange with the condenser 2 can flow to the evaporator 4 position for heat exchange.

[0023] Those skilled in the art should know that in the refrigeration system of a refrigerator or freezer, the frost location is the evaporator 4, that is, the component that needs to be defrosted is the evaporator 4. When the refrigeration system has been running for a certain period of time or the temperature sensor senses a temperature difference, the single-chip microcomputer of the control system will turn off the compressor 1 and start the water pump 6. During the refrigeration system process, the refrigerant ethylene glycol in the hot water storage tank 3 exchanges heat with the condenser 2. Specifically, the heat of the condenser 2 is transferred to the refrigerant ethylene glycol, and the refrigerant ethylene glycol is heated. The heated refrigerant ethylene glycol is circulated to the inner tube of the evaporator 4 by the water pump 6. Since the evaporator 4 is a refrigeration component with frost on its surface, the high-temperature refrigerant ethylene glycol will transfer heat with the evaporator 4 during the circulation process in the inner tube of the evaporator 4 and melt the frost on the surface of the evaporator 4 to achieve the defrosting function.

[0024] Regarding when to defrost in the present invention, it can be set according to a certain time or according to the temperature sensed by the temperature sensor. This is determined by the programmer pre-designing a program in the microcontroller. The program is software and is not the content protected by the invention. The applicant will not elaborate on it here.

[0025] The multi-flow path condensation waste heat defrosting system of the present invention can fully store the heat of the condenser 2 and use it for defrosting. Compared with electric heating defrosting, it is an innovation that is both safe and energy-saving.

[0026] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any other manner. Any person skilled in the art may utilize the above-disclosed technical content to modify or modify the present invention into equivalent embodiments. However, any simple modifications, equivalent variations, and modifications to the above embodiments that do not depart from the present invention and are based on the technical essence of the present invention remain within the scope of protection of the present invention.

Claims

1. A multi-flow condensation waste heat defrosting system, comprising a refrigeration system consisting of a compressor, a condenser, a throttling pipe, and an evaporator, characterized in that: The condenser is placed in a hot water storage tank, and a coolant is provided in the hot water storage tank; the pipeline of the evaporator is composed of a casing, the refrigerant flows through the outer tube of the casing, and the coolant flows through the inner tube of the casing; the hot water storage tank is connected to the inner tube of the casing through a connecting pipe, and a water pump is also provided on the connecting pipe, and a control system is connected to the water pump.

2. The multi-flow condensation waste heat defrosting system according to claim 1, characterized in that: The coolant is ethylene glycol.

3. The multi-flow path condensation waste heat defrosting system according to claim 1, characterized in that: The control system includes a single chip microcomputer and a temperature sensor.

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