CN107289707B - Air-cooled refrigerator - Google Patents

Abstract

The present invention provides an air-cooled refrigerator. The air-cooled refrigerator includes: an inner tank, which defines a storage compartment, and an evaporator cavity is formed on the outside of the back of the inner tank; and an evaporator, which is arranged in the evaporator cavity to provide cold energy to the storage compartment; In addition, the storage compartment is separated into an independent variable room by the thermal insulation shell, and a heater is arranged inside to adjust the temperature in the variable room in a controlled manner. The first air duct is connected. The air-cooled refrigerator of the invention can defrost the surface of the evaporator by using the waste heat after heating the food in the greenhouse, effectively avoid the problem of lowering the cooling efficiency caused by the frost on the surface of the evaporator, save the cost and reduce the energy consumption of the air-cooled refrigerator. It is avoided that the temperature change after heating the food in the changing room will affect the temperature of the refrigerating room.

Description

air-cooled refrigerator

technical field

The invention relates to the technical field of refrigeration equipment, in particular to an air-cooled refrigerator.

Background technique

In some existing refrigerators, there are compartments with heating functions, which can heat the internal temperature to more than 50°C, so as to realize the production of fermented foods such as yogurt, rice wine, and kimchi in the refrigerator. However, the heated food needs to be re-cooled to a low temperature for storage. Heating and cooling consume a lot of electricity, and at the same time increase the load on the refrigerator evaporator, resulting in an increase in the amount of frost.

A refrigerator with forced circulation of cold air for refrigeration is generally called an inter-cooled (air-cooled) refrigerator, also known as a frost-free refrigerator. The evaporator of frost-free refrigerators is usually of finned tube type, which is usually placed in the back of the freezer or refrigerator. A small fan is used to force the air in the box to convection to achieve the purpose of cooling. Frost only occurs on the evaporator. , so we can't see the frost it produces, but as the amount of frost on the evaporator increases, it will lead to a decrease in the refrigeration efficiency of the refrigerator and affect the stability of the temperature in the refrigerator compartment. The maximum number of frosts can reach more than 2 times, resulting in temperature fluctuations inside the refrigerator and an increase in energy consumption.

For the refrigerating room of the double-evaporator system, since the temperature of the compartment is higher than that of the freezing room, the temperature of the evaporator is also higher, and the amount of frost on the evaporator during the refrigeration process is less. Generally, the defrosting method is used to defrost and defrost. The process is long, and the indoor temperature fluctuates greatly, which affects the temperature in the warehouse.

SUMMARY OF THE INVENTION

In view of the above problems, the present invention is proposed to provide an air-cooled refrigerator that overcomes the above problems or at least partially solves the above problems.

A further object of the present invention is to provide a method for defrosting the evaporator of an air-cooled refrigerator.

A further object of the present invention is to save the energy consumption of the air-cooled refrigerator.

According to one aspect of the present invention, the present invention provides an air-cooled refrigerator. The air-cooled refrigerator includes: an inner tank, which defines a storage compartment, and an evaporator cavity is formed on the outside of the back of the inner tank; and an evaporator, which is arranged in the evaporator cavity to provide cold energy to the storage compartment; In addition, the storage compartment is divided into an independent variable room by the thermal insulation shell, and a heater is arranged inside to adjust the temperature in the variable room in a controlled manner. The first air duct is connected.

Optionally, the controlled opening and closing of the first air duct includes: an air supply port and an air return port, which are respectively opened on the thermal insulation shell and abut on the side wall of the evaporator cavity, and the return air port is lower than the air supply port; The air damper is arranged at the position of the inner tank corresponding to the air supply port; and the first air return damper is arranged at the position of the inner tank corresponding to the air return port.

Optionally, the air supply port is opened at a position where the side wall of the heat insulating shell is higher than the evaporator; and the air return port is opened at a position where the side wall of the heat insulating shell is opposite to the bottom of the evaporator.

Optionally, a second air duct is also formed on the outside of the back of the inner liner, which is connected to the evaporator cavity and is used for supplying air to the area of the storage compartment except the changing room; and the evaporator cavity is communicated with the second air duct. There is a second air supply damper at the position.

Optionally, the temperature changing room is arranged at the bottom of the storage compartment, the second air duct extends vertically upward, and an air supply port leading to the storage compartment is spaced apart in the extending direction.

Optionally, a second air return damper is provided at the position of the inner bladder at the bottom of the evaporator cavity, so as to allow the gas in the storage compartment to return.

Optionally, the air-cooled refrigerator further includes: a fan, disposed above the evaporator, configured to generate airflow for heat exchange through the evaporator and for supplying the air to the changing room and/or the storage compartment.

Optionally, the air-cooled refrigerator further includes: a temperature sensor, arranged in the changing room to detect the temperature of the changing room; a control board, connected with the temperature sensor, and configured to drive the heater and control the first air conditioner according to a preset control mode The channel opens and closes to adjust the temperature inside the variable chamber.

Optionally, the control board is further configured to: in the case of running in a preset heating mode, keep the first air duct closed, and drive the heater to open, so as to adjust the temperature in the temperature changing chamber to the first preset temperature; and After the heating is completed, the heater is turned off, the first air duct and the fan are controlled to be turned on, the surface of the closed evaporator is defrosted by the heat of the variable chamber, and the temperature of the variable chamber is cooled.

Optionally, the control panel is further configured to: in the case of running in a preset cooling mode, keep the first air duct open, and adjust the temperature of the variable chamber to a second preset temperature to store items, the second preset temperature lower than the first preset temperature.

The air-cooled refrigerator of the present invention includes an evaporator cavity formed on the outside of the back of the inner liner and a storage compartment which is separated from an independent changing room by a thermal insulation shell. The first air duct is connected, and the first air duct is controlled, and the surface of the evaporator can be defrosted by using the waste heat after heating the food in the changing greenhouse, which can effectively avoid the problem of cooling efficiency decline caused by frost on the surface of the evaporator.

Further, the air-cooled refrigerator of the present invention can defrost the surface of the evaporator by using the residual heat after heating and fermented food in the changing greenhouse, thereby saving costs, reducing the energy consumption of the air-cooling refrigerator, and avoiding temperature changes after heating the food in the changing greenhouse. Affects the temperature of the refrigerator compartment.

The above and other objects, advantages and features of the present invention will be more apparent to those skilled in the art from the following detailed description of the specific embodiments of the present invention in conjunction with the accompanying drawings.

Description of drawings

Hereinafter, some specific embodiments of the present invention will be described in detail by way of example and not limitation with reference to the accompanying drawings. The same reference numbers in the figures designate the same or similar parts or parts. It will be understood by those skilled in the art that the drawings are not necessarily to scale. In the attached picture:

1 is a side cross-sectional view of an air-cooled refrigerator according to an embodiment of the present invention; and

FIG. 2 is a schematic diagram of a variable temperature chamber and an evaporator chamber of an air-cooled refrigerator according to an embodiment of the present invention.

Detailed ways

This embodiment provides an air-cooled refrigerator, which can defrost the surface of the evaporator in the refrigerating compartment by using the residual heat after heating the items in the changing room. The air-cooled refrigerator in this embodiment may be an air-cooled refrigerator with dual evaporators, with a refrigerating compartment and a freezing compartment, and the two evaporators perform refrigeration respectively; or an air-cooled refrigerator with only a refrigerating compartment, where In this embodiment, the temperature changing room is generally arranged in the refrigerating room, because the heating room is provided with a heater, so it is not suitable to be arranged in the freezing room.

The working principle of an air-cooled refrigerator is generally to use air for refrigeration, and use a fan to generate an airflow that circulates in the memory air duct of the compartment. When the airflow passes through the evaporator set in the air duct, due to the low temperature of the evaporator, the two occur directly. With heat exchange, the temperature of the air is lowered, and at the same time, the cooled air is blown into the refrigerator. The air-cooled refrigerator uses this continuous circulation method to reduce the temperature of the refrigerator storage compartment.

However, there is water vapor in the air, and the water vapor condenses with condensation, so as long as there is heat exchange in the refrigerator, frost will form. The frost formed by the heat exchange of the air-cooled refrigerator condenses on the surface of the evaporator. As the amount of frost on the surface of the evaporator increases, the refrigeration efficiency of the refrigerator will decrease, and the stability of the temperature of the refrigerator compartment will be affected. The evaporator is defrosted.

1 is a side cross-sectional view of an air-cooled refrigerator 10 according to an embodiment of the present invention. As shown in FIG. 1 , the air-cooled refrigerator 10 includes an inner tank 11, and the interior of the inner tank 11 defines storage compartments. The number and structure of the compartments can be configured according to requirements. The first compartment and the second compartment; the above compartments are configured as a refrigerating compartment, a freezing compartment, a changing room or a fresh-keeping compartment according to different purposes. Each storage compartment can be longitudinally divided into a plurality of storage areas by a partition board, and items can be stored by using a shelf or a drawer. The air-cooled refrigerator 10 in this embodiment is described by taking an air-cooled refrigerator with a dual evaporator system as an example, and the air-cooled refrigerators with other structures can also achieve the technical effects of the embodiments of the present invention through simple deformation. In this embodiment, the first compartment is the refrigerating compartment 110 , the second compartment is the freezing compartment 130 , and the bottom of the refrigerating compartment 110 is further provided with a changing room 120 . Since the heating chamber 120 is provided with the heater 125 inside, it is not suitable to be arranged in the freezing compartment 130 . Therefore, the temperature changing chamber 120 in this embodiment is generally arranged in the refrigerating compartment 110 .

In the refrigerating compartment 110 , an evaporator chamber 140 is formed on the outer side of the back of the inner pot 11 . The refrigerating evaporator 142 is arranged in the evaporator cavity 140 to provide cooling capacity to the refrigerating compartment 110; and the refrigerating compartment 110 is divided into an independent variable temperature chamber 120 by a thermal insulation shell, and a heater 125 is arranged inside for controlled The temperature in the variable temperature chamber 120 is adjusted appropriately, and the variable temperature chamber 120 and the evaporator chamber 140 are closely arranged and communicated with each other through the first air duct 12 which is controlled to open and close.

A second air duct 111 is also formed on the outside of the back of the inner tank 11 and communicated with the evaporator cavity 140 for supplying air to the area of the refrigerating compartment except the changing room 120; and the evaporator cavity 140 and the second air duct 111 A second blower damper 113 is provided at the communicating position.

The temperature changing room 120 is arranged at the bottom of the refrigerating room 110 , the second air duct 111 extends vertically upward, and the air supply ports 112 leading to the refrigerating room 110 are spaced apart in the extending direction, so as to remove the cooling room 110 from the cooling room 110 . Area air supply outside 120.

The air-cooled refrigerator 10 further includes: a fan 141 disposed above the refrigerating evaporator 142 and configured to generate airflow for heat exchange through the refrigerating evaporator 142 and for supplying to the changing room 120 and/or the refrigerating compartment 110 .

When the high-temperature air flows through the refrigerating evaporator 142, the heat exchange with the refrigerating evaporator 142 is sufficient, and the temperature of the air is lowered. At the same time, the cooling air is forced to circulate through the fan 141 to send the air flow to the refrigerating compartment 110 along the second air passage 111 .

A second air return damper 114 is opened at the position of the inner tank 11 at the bottom of the evaporator cavity 140 for the return of the gas in the refrigerating compartment 110 . The air-cooled refrigerator 10 reduces the temperature of the air-cooled refrigerator 10 through this continuous cycle.

The air-cooled refrigerator 10 also includes a compressor 13, which is connected with important components such as an evaporator and a condenser to form a circuit to form a refrigeration system of the air-cooled refrigerator 10. The main function of the compressor 13 is to push the refrigerant to flow in the refrigeration system, and to prevent the air from flowing. Factors such as the cooling efficiency and noise of the cold refrigerator 10 have a great influence.

In the freezing compartment 130 of the air-cooled refrigerator 10 , a refrigerating evaporator 131 and a defrosting heater 132 for defrosting the surface of the refrigerating evaporator 131 are provided in a cavity formed on the outside of the back of the inner pot 11 .

The air-cooled refrigerator 10 of the present embodiment uses the heat of the changing room 120 to defrost the surface of the evaporator, which is generally limited to the evaporator of the refrigerating compartment 110. When the freezer evaporator 142 of the chamber 130 is defrosted, an additional defrost heater 132 is generally required.

FIG. 2 is a schematic diagram of the variable temperature chamber 120 and the evaporator chamber 140 of the air-cooled refrigerator 10 according to an embodiment of the present invention. As shown in FIG. 2 , the controlled opening and closing of the first air duct 12 includes: an air supply port 122 and an air return port 123 , which are respectively opened on the thermal insulation shell and abut on the side wall of the evaporator cavity 140 , and the air return port 123 is low At the air supply port 122; the first air supply air door 143 is disposed on the inner tank 11 at the position corresponding to the air supply port 122;

The air supply port 122 is opened at a position where the side wall of the heat preservation shell is higher than the refrigerating evaporator 142; and the air return port 123 is opened at the position where the side wall of the heat preservation shell is facing the bottom of the refrigerating evaporator 142, so as to change the heat of the greenhouse 120 Defrost the refrigerated evaporator 142 surface. When the airflow passes through and exchanges heat with the refrigerated evaporator 142 , the airflow with water vapor tends to form frost on the lower end of the refrigerated evaporator 142 , and the air return port 123 is opened on the side wall of the thermal insulation shell and faces the refrigerated evaporator 142 . At the bottom position, the air with a certain temperature can directly defrost the most frosted area of the refrigerated evaporator 142 . When the fan 141 is turned on, the residual heat after heating the fermented food in the temperature changing room 120 can smoothly enter the evaporator cavity 140, and the bottom of the refrigerating evaporator 142 can be defrosted in a targeted manner, and the setting position of the air supply port 122 is high to ensure that the air and the The refrigerated evaporator 142 fully exchanges heat, effectively improving the defrosting efficiency. On the other hand, the temperature of the air after defrosting decreases, which helps to cool down the temperature changing room 120 and avoids the influence of the temperature changing room 120 on the refrigerating compartment 110 .

In addition, the air-cooled refrigerator 10 further includes: a temperature sensor 124 , which is arranged in the changing room 120 to detect the temperature of the changing room 120 . When the heater 125 in the changing room 120 is not working, the changing room 120 can be used as a common refrigerating room 110 to store items, and the temperature sensor 124 can accurately detect whether the temperature of the changing room 120 is suitable for storing items.

The air-cooled refrigerator 10 further includes a control board 121 connected to the temperature sensor 124 and configured to drive the heater 125 and control the opening and closing of the first air duct 12 according to a preset control mode, so as to adjust the temperature in the variable temperature chamber 120 . The control board 121 can be independently disposed on the side surface of the thermal insulation shell of the variable temperature room 120 , or can be integrated on the main control board of the air-cooled refrigerator 10 .

In addition, the control board 121 is further configured to: in the case of running in a preset heating mode, keep the first air duct 12 closed, and drive the heater 125 to open, so as to adjust the temperature in the variable chamber 120 to the first preset temperature And after completing the heating, turn off the heater 125, control the first air duct 12 and the fan 141 to open, use the heat of the variable chamber 120 to defrost the surface of the closed refrigerated evaporator 142, and use the heat of the refrigerated evaporator 142 surface to be defrosted. The residual frost cools the temperature-changing greenhouse 120 .

The control panel 121 is further configured to: when operating in a preset cooling mode, keep the first air duct 12 open, and adjust the temperature of the temperature changing chamber 120 to a second preset temperature to store items. In this case, the changing room 120 acts as a general refrigerating room to store items.

A specific example of using the air-cooled refrigerator 10 of this embodiment is described below:

The variable chamber 120 of the air-cooled refrigerator 10 can be used for making yogurt, and the control panel 121 receives the user's setting instruction and executes the control process for making yogurt. First, keep the first air duct 12 closed, that is, the first air supply air door 143 and the first air return air door 144 are closed, the changing room 120 is now a separate closed room, and the heater 125 therein is activated to turn the changing room 120 The temperature inside is adjusted to 40 degrees Celsius to heat and ferment the yogurt. After the temperature in the variable chamber 120 reaches 40 degrees Celsius and is maintained for a preset period of time, the heating ends. It is judged whether the refrigerating evaporator 142 of the air-cooled refrigerator 10 has reached the defrosting condition. If the defrosting condition is met, the heater 125 is turned off and the first air duct 12 is opened, that is, the first air supply air door 143 and the first air return air door 144 are opened, And the second air supply damper 113 is closed, the refrigerating evaporator 142 stops working, and the fan 141 is turned on, so that the heat generated by heating and fermenting the yogurt in the temperature changing room 120 is discharged into the evaporator chamber 140 through the return air port 123 and the first air return air door 144, so as to discharge the heat generated by the heating and fermenting yogurt in the temperature changing room 120 into the evaporator cavity 140, so that Defrost treatment is performed on the surface of the refrigerated evaporator 142 , especially the lower end surface of the refrigerated evaporator 142 . At the same time, the residual frost on the surface of the refrigerating evaporator 142 can also cool the temperature changing room 120, so as to save the energy consumed for cooling the cooling room 120, and on the other hand, it also avoids the temperature of the cooling room 110 caused by the changing room 120. influences. It should be noted that, after the heating is completed, it is also possible to directly turn off the heater 125 without judging whether the refrigerating evaporator 142 has reached the defrosting condition, open the first air supply damper 143 and the first return air damper 144, and close the second The air supply damper 113 stops the refrigerating evaporator 142 from working, and the fan 141 is turned on to discharge the waste heat of the changing chamber 120 and defrost the refrigerating evaporator 142 .

From the above description, it can be concluded that the air-cooled refrigerator 10 of this embodiment includes an evaporator cavity 140 formed on the outside of the back of the inner pot 11 and a storage compartment separated by a thermal insulation shell to form an independent temperature changing room 120, and the cooling room is 120 and the evaporator cavity 140 are closely arranged, and the first air duct 12 is communicated with the controlled opening and closing, and the first air duct 12 is controlled, so that the heat of the variable chamber 120 can be used to defrost the surface of the evaporator and effectively avoid evaporation. The cooling efficiency is reduced due to frost on the surface of the appliance.

Further, in the air-cooled refrigerator 10 of the present embodiment, the surface of the refrigerating evaporator 142 is defrosted by the residual heat after heating the items in the changing chamber 120, and the temperature of the changing chamber 120 is cooled by the residual frost on the surface of the refrigerating evaporator 142, which saves money. The manufacturing cost is reduced and the energy consumption of the air-cooled refrigerator 10 is reduced.

By now, those skilled in the art will recognize that, although various exemplary embodiments of the present invention have been illustrated and described in detail herein, the present invention may still be implemented in accordance with the present disclosure without departing from the spirit and scope of the present invention. The content directly determines or derives many other variations or modifications consistent with the principles of the invention. Accordingly, the scope of the present invention should be understood and deemed to cover all such other variations or modifications.

Claims (7)

1. An air-cooled refrigerator, comprising: an inner bladder defining a storage compartment therein, and a vaporizer cavity is formed on the outside of the back of the inner bladder; and an evaporator, disposed in the evaporator cavity, to provide cooling capacity to the storage compartment; and The storage compartment is divided into an independent variable temperature chamber by a thermal insulation shell, and a heater is arranged inside the storage compartment for controlled adjustment of the temperature in the variable temperature chamber. and communicated through the first air duct that is controlled to open and close, a fan, disposed above the evaporator, configured to generate an air flow for heat exchange through the evaporator and for supplying to the changing room and/or the storage compartment; a temperature sensor, arranged in the changing chamber to detect the temperature of the changing chamber; a control board, connected with the temperature sensor, and configured to drive the heater and control the opening and closing of the first air duct according to a preset control mode, so as to adjust the temperature in the temperature changing chamber, The control board is further configured to: in the case of running in a preset heating mode, keep the first air duct closed, and drive the heater to open, so as to adjust the temperature in the temperature changing chamber to the first preset temperature. and after the heating is completed, the heater is turned off, the first air duct and the fan are controlled to be turned on, and the heat of the changing chamber is used to defrost the closed evaporator surface, and make the The variable greenhouse cools down. 2. The air-cooled refrigerator according to claim 1, wherein the controlled opening and closing of the first air duct comprises: The air supply port and the air return port are respectively opened on the thermal insulation shell and abutted on the side wall of the evaporator cavity, and the air return port is lower than the air supply port; a first air supply damper, disposed on the inner tank at a position corresponding to the air supply port; and The first air return damper is arranged at the position of the inner tank corresponding to the air return port. 3. The air-cooled refrigerator according to claim 2, wherein, The air supply port is opened at a position where the side wall of the thermal insulation shell is higher than the evaporator; and The air return port is opened at a position where the side wall of the thermal insulation shell is opposite to the bottom of the evaporator. 4. The air-cooled refrigerator according to claim 1, wherein, A second air duct is also formed on the outer side of the back of the inner tank, which is communicated with the evaporator cavity and is used for supplying air to the area of the storage compartment except the changing room; and A second air supply damper is arranged at a position where the evaporator chamber communicates with the second air passage. 5. The air-cooled refrigerator according to claim 4, wherein, The temperature changing chamber is arranged at the bottom of the storage compartment, the second air duct extends vertically upward, and is provided with air supply ports leading to the storage compartment at intervals in the extending direction. 6. The air-cooled refrigerator according to claim 5, wherein, A second air return damper is opened at the position of the inner tank at the bottom of the evaporator cavity, so as to allow the gas in the storage compartment to return. 7. The air-cooled refrigerator of claim 1, wherein the control panel is further configured to: In the case of running in a preset cooling mode, the first air duct is kept open, and the temperature of the temperature changing chamber is adjusted to a second preset temperature to store items, and the second preset temperature is lower than the The first preset temperature.

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