CN101696840B - Energy-saving refrigerator - Google Patents

Abstract

The invention discloses an energy-saving refrigerator, which is based on the existing frost-free air-cooled refrigerator, and further includes: a cold air inlet duct, a cold air outlet duct, an outdoor temperature sensor, an air inlet duct damper, an air outlet duct damper and a refrigerator control panel; A cold air inlet duct is set behind the freezer compartment of the refrigerator, and its two ends are connected to the cold air inside the refrigerator and outside, and one end outside the box is connected to an outdoor temperature sensor. A cold air outlet is set at the corresponding place of the bottom steel plate at the lower part of the body. One end of the cold air outlet is connected to the freezer, and the other end is connected to the air outlet door; the refrigerator control board is connected to the outdoor temperature sensor, refrigeration sensor, freezing sensor, air inlet door and air outlet. The refrigerating sensor is connected to the refrigerating air door, and the freezing sensor is connected to the compressor and the refrigerating fan. On the premise of ensuring the food storage temperature, the present invention makes full use of surrounding low-temperature cold sources, thereby realizing substantial energy saving of the refrigerator and obviously reducing product noise.

Description

An energy-saving refrigerator

technical field

The invention relates to an energy-saving refrigerator, which belongs to the technical field of refrigerator refrigeration air circuit circulation.

Background technique

Refrigerators are divided into two types: direct cooling and air-cooling. Air-cooling refrigerators use cold air forced circulation to refrigerate. An evaporator is installed inside the air-cooled refrigerator. The evaporator is usually of finned tube type. It is placed in the interlayer between the freezer and the refrigerator or at the upper back of the box. The cold air is sent to each position of the refrigerator to achieve the purpose of cooling. Since the evaporator is not in direct contact with the food, the heating system can be used to heat the evaporator for a short time, and the cooling will resume immediately after defrosting, so we cannot see what it is resulting frost.

The direct cooling and frost refrigerator is to place the food directly on the surface of the evaporator for cooling, usually multiple evaporators are installed in multiple positions of the refrigerator. Since the evaporator is the inner wall of the refrigerator, a defrosting system cannot be installed, so manual defrosting is required.

However, at present, the refrigeration of refrigerators basically adopts a closed structure, that is, the cooling of frozen foods is completely provided by the refrigeration system of the refrigerator; The food inside reaches the required temperature, resulting in a waste of energy.

Contents of the invention

The object of the present invention is to have a sufficiently low-temperature cold source around the storage place of the refrigerator, the refrigerator itself can stop cooling, and use the cold source outside the refrigerator to cool the food in the refrigerator, thereby achieving the purpose of environmental protection and energy saving.

An energy-saving refrigerator, based on the existing frost-free air-cooled refrigerator, also includes: a cold air inlet duct, a cold air outlet duct, an outdoor temperature sensor, an air inlet duct damper, an air outlet duct damper and a refrigerator control panel;

A cold air inlet duct is installed behind the freezer compartment of the refrigerator. The two ends of the cold air inlet duct are connected to the cold air inside the refrigerator and outside. Set the air inlet damper;

A cold air outlet channel is provided at the corresponding place on the bottom steel plate of the lower part of the refrigerator box. One end of the cold air outlet channel is connected to the freezer, and the other end is connected to the air outlet damper. Through the cold air outlet channel, the freezer room is connected to the outside air;

The refrigerator control board is connected to the outdoor temperature sensor, refrigeration sensor, freezing sensor, air inlet damper and air outlet damper, the refrigeration sensor is connected to the refrigeration damper, and the refrigeration sensor is connected to the compressor and the refrigeration fan;

When the outdoor temperature sensor detects that the outdoor temperature is lower than the set temperature, the refrigerator control board controls the compressor to stop working. Introduced by air door, through the air distribution of the refrigeration fan, the cold air is divided into two channels, one of which enters the refrigeration air duct, then enters the refrigerator room, flows from the refrigerator return air channel to the evaporator after circulating in the refrigerator room, and then returns to the refrigeration fan , to complete the refrigerating cycle; the other path enters the freezing air duct, then enters the freezing chamber, circulates in the freezing chamber, and then discharges to the outdoors through the cold air outlet duct, and the refrigerator completes all air circulation;

When the outdoor temperature sensor detects that the outdoor temperature is higher than the set temperature, the control board of the refrigerator controls the air inlet damper and the air outlet damper to close, the compressor starts to work, and the refrigerator performs normal cooling.

The advantages of the present invention are:

Under the premise of ensuring the food storage temperature, the present invention makes full use of the outdoor low-temperature air as the cold source of the indoor refrigerator, and the compressor stops working during the refrigeration process, thereby realizing a large energy saving of the refrigerator and obviously reducing the product noise; When there is a sufficient low-temperature cold source, the refrigerator can still use the refrigeration system of the refrigerator itself to obtain the cold source like other air-cooled refrigerators.

Description of drawings

Fig. 1 is a structural schematic diagram of an energy-saving refrigerator of the present invention;

Fig. 2 is a schematic diagram of the cold air circulation of the present invention.

In the picture:

1-freezer 2-refrigerator 3-cold air inlet 4-outdoor temperature sensor

5-air filter 6-air inlet door 7-freezing air duct 8-cold air outlet

9-Air outlet damper 10-Refrigeration duct 11-Refrigeration damper 12-Box body

13-Freezing fan 14-Refrigeration sensor 15-Refrigerator control board 16-Freezing sensor

17-evaporator 18-refrigerated return air duct

Detailed ways

The present invention will be further described in detail with reference to the accompanying drawings and embodiments.

An energy-saving refrigerator of the present invention, on the basis of the existing frost-free (air-cooled) refrigerator, also includes a cold air inlet duct 3, a cold air outlet duct 8, an outdoor temperature sensor 4, an air inlet duct damper 6, and an air outlet duct Damper 9 and refrigerator control board 15.

A cold air inlet duct 3 is arranged behind the freezer compartment 1 of the refrigerator, and the two ends of the cold air inlet duct 3 communicate with the cold air inside the refrigerator and outside. One end of the air duct 3 located outside the cabinet is connected to the outdoor temperature sensor 4, and an air filter 5 is set between the cold air inlet duct 3 and the outdoor temperature sensor 4. The air filter 5 is used to purify the cold air entering the refrigerator, and the cold air inlet duct 3. Set the air inlet duct damper 6 at the box body 12;

A cold air outlet duct 8 is arranged at the corresponding place of the bottom steel plate of the refrigerator cabinet 12, and one end of the cold air outlet duct 8 is connected to the freezing chamber 1, and the other end is connected to the outlet damper 9, and the freezing chamber is communicated with the outside air through the cold air outlet duct 8.

The refrigerating damper 11 is connected to the refrigerating sensor 14, the compressor and the refrigerating fan 13 are connected to the refrigerating sensor 16, the outdoor temperature sensor 4, the refrigerating sensor 14 and the refrigerating sensor 16 are connected to the refrigerator control board 15, and the air inlet duct damper 6 and the air outlet duct damper 9 are connected to the refrigerator control panel15.

When the outdoor temperature sensor 4 detects that the outdoor temperature is lower than the set temperature, for example, the set temperature is -15°C, the refrigerator control panel 15 controls the compressor to stop working through the freezing sensor 16, and at the same time, controls the air inlet door 6 and the air outlet. The air door 9 is opened, the freezing fan 13 rotates, and the outdoor cold air is introduced from the air inlet air door 3, as shown in Figure 2, the arrow of the dotted line in the figure represents the flow direction of the cold air, the cold air entering through the air inlet air channel 3, After the air distribution of the refrigeration fan 13, the cold air is divided into two paths, one path enters the refrigerating air duct 10, and then enters the refrigerating room 2. After circulating in the refrigerating room 2, it flows from the refrigerating return air duct 18 to the evaporator 17, and then returns There are 13 refrigerating fans to complete the refrigerating cycle; the other one enters the refrigerating air channel 7, then enters the freezing room 1, circulates in the freezing room 1, and then discharges to the outdoors through the cold air outlet channel 8, and the refrigerator completes the entire air circuit cycle, thereby completing The purpose of using outdoor air-conditioning to make the temperature of each room of the refrigerator consistent with the normal operation of the compressor;

When the outdoor temperature sensor 4 detects that the outdoor temperature is higher than the set temperature, the refrigerator control board 15 controls the air inlet damper 6 and the air outlet damper 9 to close, the compressor starts to work, and the refrigerator performs normal refrigeration.

When the refrigerator of the present invention has been operated for more than 10 hours, check the internal temperature of the refrigerator. The stable temperature of the freezer compartment 1 is -16.5°C, and the stable temperature of the freezer compartment is 4°C. The refrigerator can work normally. Under the premise of ensuring the food storage temperature, the present invention makes full use of the outdoor low-temperature air as the cold source of the indoor refrigerator, and the compressor stops working during the refrigeration process, thereby realizing a large energy saving of the refrigerator and obviously reducing the product noise; When there is a sufficient low-temperature cold source, the refrigerator can still use the refrigeration system of the refrigerator itself to obtain the cold source like other air-cooled refrigerators.

Claims (3)

1. An energy-saving refrigerator, based on an existing frost-free air-cooled refrigerator, is characterized in that it also includes: a cold air inlet duct, a cold air outlet duct, an outdoor temperature sensor, an air inlet damper, an air outlet damper and refrigerator control plate; A cold air inlet duct is installed behind the freezer compartment of the refrigerator. The two ends of the cold air inlet duct are connected to the cold air inside the refrigerator and outside. Set the air inlet damper; A cold air outlet channel is provided at the corresponding place on the bottom steel plate of the lower part of the refrigerator box. One end of the cold air outlet channel is connected to the freezer, and the other end is connected to the air outlet damper. Through the cold air outlet channel, the freezer room is connected to the outside air; The refrigerator control board is connected to the outdoor temperature sensor, refrigeration sensor, freezing sensor, air inlet damper and air outlet damper, the refrigeration sensor is connected to the refrigeration damper, and the refrigeration sensor is connected to the compressor and the refrigeration fan; When the outdoor temperature sensor detects that the outdoor temperature is lower than the set temperature, the refrigerator control board controls the compressor to stop working. The cold air is introduced into the channel air door, and through the air distribution of the refrigeration fan, the cold air is divided into two channels, one of which enters the refrigeration air channel, and then enters the refrigerator room. After circulating in the refrigerator room, it flows from the refrigerator return air channel to the evaporator, and then returns to the refrigeration fan. , to complete the refrigeration cycle; the other path enters the freezing air duct, then enters the freezing chamber, circulates in the freezing chamber, and then discharges to the outdoors through the cold air outlet duct, and the refrigerator completes all air circulation; The refrigerated return air duct is arranged in the rear wall of the refrigerator and freezer compartments, the inlet of the refrigerated return air duct is located at the lower part of the refrigerator compartment, and the outlet of the refrigerated return air duct is located at the bottom of the refrigerator compartment. on the casing of the freezing chamber and below the evaporator; The outlet end of the cold air inlet channel is arranged on the rear wall of the freezer box, and is located below the refrigeration fan and above the evaporator; When the outdoor temperature sensor detects that the outdoor temperature is higher than the set temperature, the control board of the refrigerator controls the air inlet damper and the air outlet damper to close, the compressor starts to work, and the refrigerator performs normal cooling. 2. The energy-saving refrigerator according to claim 1, wherein an air filter is provided between the cold air inlet duct and the outdoor temperature sensor. 3. The energy-saving refrigerator according to claim 1, wherein one end of the cold air inlet duct inside the refrigerator is located directly below the freezing fan.

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