CN101446465B - refrigerator - Google Patents

Abstract

A refrigerator, which has a refrigerating chamber (6) cooled by a direct cooling method, a freezing chamber (8) and a heat preservation chamber (7) cooled by an indirect cooling method, and a cooler ( 19), a cooling fan (18) arranged above the cooler, a defrosting heater (20) for defrosting the cooler, and a cooler with a cooler cover provided in front of the cooler to store the cooler Room (16). It cools the heat preservation chamber through the control panel (25) including the channel (14) connected to the cooler chamber, the discharge outlet (26) and the damper (24) to control the internal air volume, while the heat preservation chamber is provided with heating for temperature compensation. device (30).

Description

refrigerator

The present invention is a divisional application of Chinese patent application No. 200410100056.0 filed on December 7, 2004 by Matsushita Electric Industrial Co., Ltd. with the title of invention "Refrigerator".

technical field

The invention relates to a refrigerator comprising a refrigerating chamber cooled by direct cooling, a freezing chamber cooled by indirect cooling, and a heat preservation chamber.

Background technique

This kind of refrigerator in the prior art forms a refrigeration cycle in which the refrigerant discharged from the compressor passes through the condenser, the throttle valve, the cooler and then returns to the compressor, including the direct cooling method in which the cooling wall surface cooled by the cooler cools the inside of the box. And the indirect cooling method that circulates the cold air cooled by the cooler into the box to cool the box. For example, the contents disclosed in Japanese Patent Application Laid-Open No. 2000-28257. Hereinafter, the above-mentioned conventional refrigerator will be described with reference to the accompanying drawings.

Fig. 16 is a schematic cross-sectional view of a conventional refrigerator disclosed in the above publication. As shown in FIG. 16 , the existing refrigerator is divided into a refrigerated area and a frozen area up and down by a partition plate 345 having a thermal insulation effect.

In addition, the freezer compartment is divided into a first freezer compartment 349 and a second freezer compartment 350 by a partition 348 in the freezer compartment. Further, a cooling pipe 351 is arranged on the wall surface of the inner box 302 of the refrigerating room 306, and a cooler 319 and a cooling fan 318 are provided on the back of the freezing section.

However, in the above-mentioned existing structure, the temperature of the vegetable compartment in the refrigerated area is difficult to control the temperature because it depends on the temperature of the refrigerated compartment, which accelerates the deterioration of vegetable freshness, which is not ideal for food preservation.

Such defect also exists in the first freezer compartment 349, because it is affected by the temperature of the second freezer compartment 350, so it is difficult to carry out temperature control, which is restricted in use and has unsatisfactory usability.

Contents of the invention

The present invention was developed to solve the above problems, and its object is to provide a refrigerator with excellent usability and low price, which has independent heat preservation chambers and improves the freshness preservation effect of food by controlling them at a predetermined temperature.

In order to solve the above-mentioned problems, the refrigerator of the present invention includes a refrigerating room cooled by a direct cooling method, a freezing room cooled by an indirect cooling method, and a heat preservation room, and a cooler for generating cold air for cooling the box is provided above the cooler. A cooling fan, a defrosting heater for heating and defrosting the cooler, and a cooler chamber for storing the cooler with a cooler cover on the front of the cooler. Moreover, the heat preservation chamber has: a passage connected to the cooler chamber, an outlet connected to the passage, a damper for controlling the air volume, a control panel with the damper inside, and a A heater for temperature compensation on the wall surface of the chamber, wherein a curved portion for suppressing the inflow of warm and humid air is provided in the air passage before and after the damper.

According to the above-mentioned structure, since the refrigerator compartment and the freezer compartment are independently cooled, the temperature in each compartment can be maintained at a predetermined temperature without interfering with each other. In particular, in the direct cooling method in which the refrigerating room is cooled by using a direct cooling plate (direct cooling cooling plate), etc., the humidity in the refrigerating room can be kept at a high humidity by the moisture attached to the surface of the direct cooling plate, and at the same time, the temperature is lower than that of the refrigerating room. In the independently formed insulation room near 0°C, the cooling capacity is controlled within the set temperature (operating temperature) range of the damper in the control panel, and the temperature compensation heater conduction ratio is controlled to keep the insulation room at the specified temperature. Temperature, thus, keeps the food at the specified temperature.

In addition, the refrigerator according to the second aspect of the present invention has a refrigerating room cooled by direct cooling, a freezer room cooled by indirect cooling, and a heat preservation room, and a cooler for generating cold air for cooling the inside of the box. A cooling fan above the cooler and a cooler room in which a cooler cover is provided in front of the cooler and accommodates the cooler is characterized in that a channel connected to the cooler room, a discharge suction port of cold air, and a cooler room are formed. There is an air path for adjusting any one of the damper or the heat preservation room fan in the channel, and the air path is arranged in the heat preservation room, and a part of the filling is removed between the bottom wall of the refrigeration room and the top wall of the heat preservation room. The heat insulating material formed in a concave shape constitutes a top passage between the top wall and the top passage, and a discharge port for discharging cold air into the heat preservation chamber is provided in the top passage.

Description of drawings

Fig. 1 is a longitudinal sectional view of a refrigerator according to a first embodiment of the present invention;

Fig. 2 is the structural diagram of the refrigeration cycle of the first embodiment of the present invention;

Fig. 3 is a longitudinal sectional view of a refrigerator according to a second embodiment of the present invention;

4 is a sectional view around the mechanical damper of the refrigerator according to the third embodiment of the present invention;

5 is a cross-sectional view around the mechanical damper of the refrigerator according to the fourth embodiment of the present invention;

Fig. 6 is a sectional view around the mechanical damper of the refrigerator according to the fifth embodiment of the present invention;

7 is a sectional view around a cooling fan of a refrigerator according to a sixth embodiment of the present invention;

Fig. 8 is a longitudinal sectional view of a refrigerator according to a seventh embodiment of the present invention;

Fig. 9 is a structural diagram of a refrigeration cycle of a seventh embodiment of the present invention;

Fig. 10 is a longitudinal sectional view of a refrigerator according to an eighth embodiment of the present invention;

Fig. 11 is a longitudinal sectional view of a refrigerator according to a ninth embodiment of the present invention;

Fig. 12 is a longitudinal sectional view of a refrigerator according to a tenth embodiment of the present invention;

Fig. 13 is a longitudinal sectional view of a refrigerator according to an eleventh embodiment of the present invention;

Fig. 14 is a longitudinal sectional view of a refrigerator according to a twelfth embodiment of the present invention;

Fig. 15 is a longitudinal sectional view of a refrigerator according to a thirteenth embodiment of the present invention;

Fig. 16 is a longitudinal sectional view of a conventional refrigerator of the present invention.

Detailed ways

Embodiments of the present invention will be described below with reference to the drawings.

first embodiment

Fig. 1 is a longitudinal sectional view of a refrigerator according to a first embodiment of the present invention. FIG. 1 shows a refrigerator in which a refrigerator main body 1 is composed of a heat insulating box 5 filled with a heat insulating material 4 between an inner box 2 and an outer box 3 . Refrigerator main body 1 has refrigerating chamber 6, heat preservation chamber 7, freezing chamber 8 from above, and front side forms refrigerating chamber opening and closing door 9, heat preservation chamber opening and closing door 10, freezing chamber opening and closing door 11.

The refrigerating chamber 6 and the heat-retaining chamber 7 are separated by a partition 12 having a heat-insulating effect, and the heat-retaining chamber 7 and the freezing chamber 8 are separated by a partition 13 having a heat-insulating effect. A channel 14 connected to the freezing chamber 8 is provided on the inner side of the partition 13 . In addition, the inner case 2 back side of the refrigerating room 6 is provided with a pipe fitting plate 15 (evaporator) connected to the wall, and the refrigerator 6 is formed with a cooling wall surface cooled by the pipe fitting plate 15 .

Cooler room 16 in freezer compartment 8 is partitioned by cooler cover 17 . In the cooler chamber 16, a cooling fan 18, a cooler 19, and a defrosting heater 20 are arranged. On the cooler cover 17, an outlet 22 for discharging cold air discharged from the cooling fan 18 to the food storage box 21 in the freezer compartment 8 is formed, and at the same time, a passage 14 connected to the thermal insulation compartment 7 on the back side of the partition 13 is also formed. .

The food storage box 23 is provided in the thermal insulation chamber 7, and the control panel 25 which has the mechanical damper 24 inside is arrange|positioned at the back. The control panel 25 is connected to the passage 14 on the inner side of the partition 13 , and the downstream side of the mechanical damper 24 forms a discharge port 26 for exhausting air into the heat preservation chamber 7 .

The partition plate 13 of the heat preservation chamber 7 and the freezer chamber 8 has a structure in which a heat insulating material 29 is filled between the bottom wall 27 of the heat preservation chamber 7 and the top wall 28 of the freezer chamber 8 . In addition, a heater 30 for temperature compensation is arranged in connection with the wall surface of the bottom wall 27 of the heat preservation chamber 7 , and the heat preservation chamber 7 has a heated wall surface heated by the heater 30 for temperature compensation.

Figure 2 shows the refrigeration cycle. The refrigerant discharged from the compressor 31 is condensed by the condenser 32 and the flow path is switched by the three-way valve 33 . A part is depressurized by the capillary tube 34, evaporated by the tube mounting plate 15, the cooler 19, passes through the accumulator 35, and returns to the compressor 31, so that the cooling cycle is carried out in the refrigerator compartment and the freezer compartment at the same time. The other part is depressurized by the capillary tube 34, evaporated by the cooler 19, and returned to the compressor 31 via the accumulator 35, so that the cooling cycle is carried out in the freezing chamber alone. Therefore, the refrigerating compartment 6 is cooled by the tube plate 15 connected to the back surface of the inner box 2, and the freezing compartment 8 is agitated and cooled by the latent heat of evaporation of the cooler 19 by the cooling fan 18 .

Next, the operation and function of the refrigerator formed as above will be described. First, the compressor 31 is operated, and the refrigerant is compressed, condensed, and decompressed, so that the tube plate 15 or the cooler 19 is cooled by the latent heat of evaporation. The tube mounting plate 15 is connected to the back of the inner box 2 of the refrigerating room 6, and the back of the inner box 2 of the refrigerating room 6 becomes a cooling wall surface to cool the refrigerating room 6. On the other hand, in the cooler 19 in the cooler chamber 16 , cold air is discharged by the cooling fan 18 , passes through the air passage in the cooler cover 17 , and is discharged from the outlet 22 to the food storage box 21 . After exchanging heat with the food storage box 21, the discharged cold air is sucked from the lower part of the cooler cover 17 .

The cold air discharged by the cooling fan 18 passes through the air passage in the cooler cover 17 , and a part of the cold air flows into the passage 14 inside the partition 13 , and circulates to the control panel 25 on the back side of the heat preservation chamber 7 . The cold air flowing into the control panel 25 is discharged from the outlet 26 to the food storage box 23 through the mechanical damper 24, and after heat exchange with the food storage box 23, it is sucked in from the air passage (not shown) at the back and returns to the cooler chamber 16. At this time, the heat sensitive part of the mechanical damper 24 detects the temperature in the heat preservation chamber 7, and by changing the temperature in the heat preservation chamber 7, the mechanical damper 24 is controlled within the set temperature (working temperature) range of the mechanical damper 24. Adjust the amount of cold air through the damper to keep the temperature constant.

Through the above-mentioned effects, the refrigerating chamber 6 is controlled at around 3°C, the heat preservation chamber 7 is at about 0°C, and the freezing chamber 8 is at -20°C.

In addition, the heater 30 for temperature compensation is connected to the wall surface of the bottom wall 27 of the thermal insulation chamber 7, and the bottom wall 27 of the thermal insulation chamber 7 becomes a heating wall surface to heat the food storage box 23 in the thermal insulation chamber 7. The heater 30 for temperature compensation The amount of heat generated by the compressor 31 varies depending on the operating conditions of the compressor 31 and the like.

As described above, in the embodiment, the refrigerator compartment 6 and the freezer compartment 8 are independently cooled, so that the temperature in each compartment can be kept at a predetermined temperature without affecting each other. In particular, in the direct cooling method in which the refrigerating room 6 is cooled by using a direct cooling plate with refrigerant pipes or the like, the moisture adhering to the surface of the direct cooling plate is used to keep the refrigerating room at a high humidity while keeping the temperature lower than that of the refrigerating room 6. In the cooling of some independently formed heat preservation chambers 7 around 0°C, the cooling fan 18 is used to circulate the latent heat of evaporation of the cooler into the heat preservation chamber, and further, the mechanical damper 24 that detects the temperature of the heat preservation chamber 7 is controlled. The temperature of the heat preservation chamber 7 is kept constant by the amount of circulating cold air, the temperature of the food in the food storage box can be kept fixed, and the freshness preservation performance of the food can be improved.

In addition, by adjusting the conduction ratio of the temperature compensating heater 30 according to the operating conditions of the compressor, etc., and controlling the calorific value, the heat preservation chamber 7 can be heated, and the temperature of the food in the food storage box can be kept constant, thereby improving the temperature of the food. Freshness preservation performance.

second embodiment

Fig. 3 is a longitudinal sectional view of a refrigerator according to a second embodiment of the present invention. In addition, the same structures as those of the first embodiment are denoted by the same symbols, and detailed description thereof will be omitted. In FIG. 3 , the refrigerator main body 1 is composed of a heat insulating box 5 filled with a heat insulating material 4 between the inner box 2 and the outer box 3 , and an outside air temperature detection sensor 36 for detecting the temperature of the outside air.

In addition, since the structure of the refrigerating cycle of the refrigerator of this embodiment is the same as that of the refrigerating cycle of the first embodiment shown in FIG. 2, no further description will be given.

The refrigerator of this embodiment formed as above around the parts different from the first embodiment will describe its operation and function in detail.

The outside air temperature detection sensor 36 detects the outside air temperature and adjusts the conduction ratio of the temperature compensation heater 30 to change the calorific value of the temperature compensation heater 30 . The heater 30 for temperature compensation is connected to the wall surface of the bottom wall 27 of the heat preservation chamber 7, and the bottom surface wall 27 of the heat preservation chamber 7 becomes a heating wall surface to heat the food storage box 23 in the heat preservation chamber 7.

As described above, in this embodiment, generally, when the outside air temperature is low, the endothermic load decreases and the temperature inside the box becomes low. Thus, the heat preservation chamber can be heated, and the temperature of the food in the food storage box can be kept constant.

third embodiment

4 is a cross-sectional view showing a side around a mechanical damper of a refrigerator according to a third embodiment of the present invention. The same structures as those of the first embodiment or the second embodiment are denoted by the same symbols and will not be described in detail.

In FIG. 4, the cooler compartment 16 in the freezer compartment is partitioned by a cooler cover. A cooling fan 18 , a cooler 19 , and a defrosting heater 20 are arranged in the cooler chamber 16 . The cooler cover is equipped with a freezer discharge outlet for discharging cold air discharged from the cooling fan 18 to the food storage box in the freezer, and forms an air path connected to the passage 14 connected to the insulation compartment inside the partition plate 13 .

There is a food storage box in the thermal insulation room, and a control panel 25 with a mechanical damper 24 inside is disposed on the back. The control panel 25 is connected to the channel 14 inside the partition plate 13, and an outlet 26 facing the heat preservation chamber is formed on the downstream side of the mechanical damper 24.

The refrigerating cycle of the refrigerator of this embodiment has the same structure as that of the refrigerating cycle of the first embodiment shown in FIG. 2, so description thereof will be omitted.

The refrigerator of this embodiment formed as above will describe its operation and function around the parts different from the first embodiment or the second embodiment.

Part of the cold air discharged by the cooling fan 18 flows into the passage 14 in the back of the partition 13 and circulates to the control panel 25 on the back of the heat preservation chamber 7 . The cold air flowing into the control panel 25 is discharged from the outlet 26 to the food storage box through the mechanical damper 24 , and after heat exchange with the food storage box, it is sucked in by the air passage at the back and returns to the cooler chamber 16 . At this time, the heat-sensitive part of the mechanical damper 24 detects the temperature in the heat preservation chamber, and by changing the temperature of the heat preservation chamber, the heat passing through the mechanical damper 24 is controlled within the range of the set temperature (working temperature) of the mechanical damper 24. Cooling air volume to keep the temperature constant.

Generally, if the temperature in the box reaches the specified temperature, the compressor will stop, and the pressure will be balanced, then the warm and humid air in the heat preservation chamber will flow back from the outlet 26 to the side of the mechanical damper 24. At this time, the compressor is running around the cooling mechanical damper. Frost will form on the sides, and a frost prevention heater is installed to prevent this. However, by providing the turning portion (trap) 37 and the turning portion 38 in the air passage before and after the mechanical damper 24, it is difficult for warm and humid air to flow in.

As described above, in the embodiments of the present invention, warm moisture is difficult to flow in by providing the curved parts before and after the mechanical damper, so that frost prevention reliability can be ensured at low cost without using a frost prevention heater. .

Fourth embodiment

5 is a cross-sectional view showing a side around a mechanical damper of a refrigerator according to a fourth embodiment of the present invention. The same structures as those of the third embodiment are denoted by the same symbols and will not be described in detail.

In FIG. 5, the cooler compartment 16 in the freezer compartment is partitioned by a cooler cover. In the cooler chamber 16, a cooling fan 18, a cooler 19, and a defrosting heater 20 are arranged. The cooler cover 17 is formed with a freezer outlet for discharging cold air discharged from the cooling fan 18 to the food storage box in the freezer, and an air path connected to the duct 14 connected to the insulation compartment inside the partition 13 .

The refrigerating cycle of the refrigerator of this embodiment has the same structure as that of the refrigerating cycle of the first embodiment shown in FIG. 2, so description thereof will be omitted.

The operation and function of the refrigerator of the present embodiment formed as above will be described below around the parts different from the third embodiment.

The defrosting of the cooler 19 is performed by energizing the defrosting heater 20 every predetermined operation time. During the defrosting operation, the frost adhered to the cooler 19 is heated by the defrosting heater 20 arranged below the cooler 19 to form water droplets and removed from the cooler 19 . The heating by the defrosting heater 20 heats the entire interior of the cooler chamber 16 . The warm and humid air in the cooler chamber 16 rises naturally, passes through the cooling fan 18 , and flows into the control panel 25 in the thermal insulation chamber. Usually, warm and humid air flows into the air duct, and frost forms around the mechanical damper that is cooled while the compressor is running. As a countermeasure against this, a frost prevention heater is installed. However, by shifting the position of the duct 14 from the cooling fan 18 , it becomes difficult to flow into the control panel 25 .

As described above, in this embodiment, by making the passage connected to the heat preservation chamber deviate from the cooling fan, it is difficult for the warm and humid air to flow into the mechanical damper during defrosting, and it is possible to eliminate the need for a frost prevention heater and reduce the cost. To ensure the reliability of frost protection, and to suppress the temperature rise of the heat preservation room.

fifth embodiment

Fig. 6 is a sectional view showing a side around a mechanical damper of a refrigerator according to a fifth embodiment of the present invention. The same structures as those of the third embodiment are denoted by the same symbols and will not be described in detail.

In FIG. 6, the cooler compartment 16 in the freezer compartment is partitioned by a cooler cover. A cooling fan 18 , a cooler 19 , and a defrosting heater 20 are arranged in the cooler chamber 16 . The cooler cover 17 is formed with a freezer outlet for discharging the cold air discharged from the cooling fan 18 to the food storage box in the freezer, and an air passage connected to the passage 14 connected to the insulation compartment inside the partition 13 . There is a food storage box in the thermal insulation room, and a control panel 25 having a mechanical damper 24 inside is disposed on the back. The control panel 25 is connected to the channel 14 inside the partition plate 13, and an outlet 26 facing the heat preservation chamber is formed on the downstream side of the mechanical damper 24.

The cooler cover surface 39 made of resin and the heat insulating member 40 are incorporated in the cooler cover, and the discharge air passage 41 for the heat preservation compartment and the discharge air passage 42 for the freezer compartment are formed. The cooler cover is located in front of the cooler, the upper part of the cooler cover has a freezer outlet, and the lower part has a freezer return air path (not shown). The cold air discharged from the cooling fan 18 is connected to the duct 14 which is provided with a bend portion 43 in the heat-retaining chamber discharge air passage 41 in the cold air cover and connected to the heat-retaining chamber.

The refrigerating cycle of the refrigerator of this embodiment has the same structure as that of the refrigerating cycle of the first embodiment shown in FIG. 2, so description thereof will be omitted.

The operation and function of the refrigerator of the present embodiment formed as above will be described below around the parts different from the third embodiment.

The defrosting of the cooler 19 is performed by energizing the defrosting heater 20 every predetermined operation time. At this time, the defrosting heater 20 is used to heat the entire interior of the cooler chamber 16 . The warm and humid air in the cooler chamber 16 rises naturally, and continues to rise through the cooling fan 18 . But, by arranging the curved portion 43 in the air passage in the cooling cover, it is more difficult for warm and humid air to flow into the channel 14 connected with the heat preservation chamber.

As mentioned above, in this embodiment, by providing a return bend between the cooling fan and the heat-retaining chamber discharge air path connected to the heat-retaining chamber, it is more difficult for the warm and humid air during defrosting to flow into the mechanical damper. Installing the heater for preventing frost formation ensures low-cost frost prevention reliability and suppresses temperature rise in the heat preservation chamber.

Sixth embodiment

Fig. 7 is a cross-sectional view showing the periphery of a cooling fan of a refrigerator according to a sixth embodiment of the present invention. The same structures as those of the fifth embodiment are denoted by the same symbols and will not be described in detail.

In FIG. 7 , the cooler compartment 16 in the freezer compartment is partitioned by a cooler cover 17 . A cooling fan 18 , a cooler 19 , and a defrosting heater 20 are arranged in the cooler chamber 16 . The cooler cover 17 is formed with a freezer outlet for discharging the cold air discharged from the cooling fan 18 to the food storage box in the freezer, and an air path connected to the passage connected to the heat preservation compartment on the inside of the partition. There is a food storage box in the thermal insulation room, and an air duct with a mechanical damper inside is arranged on the back. The air path is connected with the channel inside the partition, and an outlet towards the heat preservation chamber is formed on the downstream side of the mechanical regulating damper.

The cooler cover 17 incorporates a cooler cover surface 39 made of resin and a heat insulating member 40 and is located in front of the cooler 19 . The upper part of the cooler cover 17 has a freezer discharge port 22, and the lower part has a freezer return air path (not shown). The cold air discharged from the cooling fan 18 is connected to the duct that is provided with a bend in the heat-retaining room discharge air duct 41 in the cold-air cover 17 and connects to the heat-retaining room. In addition, a bend portion 44 is provided forward in the discharge direction in the freezer compartment discharge air passage 42 that guides cold air into the freezer compartment.

The refrigerating cycle of the refrigerator of this embodiment has the same structure as that of the refrigerating cycle of the first embodiment shown in FIG. 2, so description thereof will be omitted.

The operation and function of the refrigerator of the present embodiment formed as above will be described below around the parts different from the fifth embodiment.

The defrosting of the cooler is performed by energizing the defrosting heater every predetermined operating time. At this time, the defrosting heater is heated to heat the entire cooler chamber. The warm moisture in the cooler room rises naturally, and continues to rise through the cooling fan. However, by providing a curved portion in the heat-retaining chamber exhaust air passage in the cooling cover, it is more difficult for warm and humid air to flow into the passage connected to the heat-retaining chamber.

By guiding cold air into the freezer chamber with the discharge air duct 42 in the freezer chamber, a return bend 44 is provided ahead of the discharge direction, so that warm and humid air can be prevented from flowing into the freezer chamber 8 from the freezer chamber discharge port 22, and it is also possible to prevent airflow in the freezer chamber case. Temperature rise, frost formation in the air duct or near the discharge outlet.

As mentioned above, in this embodiment, by providing a return bend between the cooling fan and the heat-retaining chamber discharge air path connected to the heat-retaining chamber, it is further difficult for the warm and humid air during defrosting to flow into the mechanical damper. The heater for preventing frost formation is installed, and the reliability of frost prevention is ensured at low cost. In addition, by providing a curved portion in the freezer discharge air passage 42 that guides the cold air into the freezer, warm and humid air can be prevented from flowing into the freezer from the freezer discharge port, and the temperature in the freezer can be prevented from rising. or frost near the discharge port.

Seventh embodiment

Fig. 8 is a longitudinal sectional view showing a refrigerator according to a seventh embodiment of the present invention. FIG. 8 shows a refrigerator in which a box 101 is constituted by a heat insulating box 108 filled with a heat insulating material 107 between an inner box 105 and an outer box 106 . The refrigerator has a refrigerating chamber 121, a heat preservation chamber 131, and a freezing chamber 141 from above, and the front side forms a refrigerating chamber opening and closing door 102, an insulating chamber opening and closing door 103, and a freezing chamber opening and closing door 104.

The refrigerating chamber 121 and the heat preservation chamber 131 are separated by a partition 109 having a heat insulation effect, and the heat preservation chamber 131 and the freezer chamber 141 are separated by a partition 110 having a heat insulation effect. A channel 111 connected to the freezer compartment 141 is disposed on the inside of the partition 110 .

Refrigerator shelf 122 and refrigerator case 123 for storing food are arranged in refrigerator 121 . In addition, the inner box 105 back of the refrigerator compartment 121 is equipped with a tube-mounted plate 119 (evaporator) connected to the wall, and the refrigerator compartment 121 has a cooling wall surface cooled by the tube-mounted plate 119 .

The cooler compartment 151 in the freezer compartment 141 is partitioned by a partition 144 having a thermal insulation effect. A cooling fan 152 , an evaporator 153 , and a defrosting heater 154 are disposed in the cooler chamber 151 . Formed on the partition 144 is the outlet 143 that discharges the cold air discharged from the cooling fan 152 to the freezer compartment case 142 for storing food in the freezer compartment 141, and also forms a connection with the heat preservation chamber 131 on the inside of the partition plate 110. The air path connected by channel 111.

Fig. 9 shows the refrigeration cycle of this embodiment. The refrigerant discharged from the compressor 161 is condensed by the condenser 162 , and the flow path is switched by the three-way valve 163 . A part is depressurized by the capillary tube 164, evaporated by the tube mounting plate 119 and the evaporator 153, and then returned to the compressor 161 through the accumulator 166, so that the cooling cycle is performed simultaneously in the refrigerator compartment and the freezer compartment. In addition, the other part is depressurized by the capillary tube 165, evaporated by the evaporator 153, and then returned to the compressor 161 through the accumulator 166, so that the cooling cycle is independently performed in the freezing chamber. Therefore, the refrigerating room 121 is cooled by the tube mounting plate 119 connected to the back of the inner box 105, and the freezing room 141 is agitated and cooled by the latent heat of evaporation 153 by the cooling fan 152.

The heat preservation chamber 131 has a heat preservation chamber box 132 for accommodating food, and a channel 133 with a mechanical damper 134 inside is arranged on the back. The passage 133 is connected to the passage 111 in the partition plate 110 , and forms a discharge port 135 toward the interior of the heat preservation chamber 131 on the downstream side of the mechanical damper 134 .

Next, the operation and function of the refrigerator formed as described above will be described. First, the compressor 161 operates, and the refrigerant is compressed, condensed, and depressurized, so that the tube plate 119 and the evaporator 153 are cooled by the latent heat of evaporation.

The tube loading plate 119 is connected to the back side of the inner case 105 of the refrigerator compartment 121, and the back side of the inner case 105 of the refrigerator compartment 121 becomes a cooling wall surface to cool the refrigerator compartment shelf 122 and the refrigerator compartment case 123 in the refrigerator compartment 121.

In the evaporator 153 in the cooler room 151 , cold air is discharged by the cooling fan 152 , passes through the air passage in the partition plate 144 , and is discharged from the discharge port 143 to the freezer compartment case 142 . The discharged cold air is sucked from the lower part of the partition plate 144 after exchanging heat with the freezer compartment case 142 .

Furthermore, the cold air discharged from the cooling fan 152 passes through the air passage in the partition 144 , but a part of the cold air flows into the passage 111 inside the partition 110 and circulates to the passage 133 on the back side of the heat preservation chamber 131 . The cold air flowing into the passage 133 is discharged from the outlet 135 to the heat preservation chamber box 132 through the mechanical damper 134 , and after heat exchange with the heat preservation chamber case 132 , it is inhaled from the passage 133 at the back and returns to the cooler chamber 151 . At this time, the heat-sensitive part of the mechanical damper 134 detects the temperature in the heat preservation chamber 131, and by changing the temperature of the heat preservation chamber 131, the temperature is controlled within the range of the set temperature (working temperature) of the mechanical damper 134 through mechanical adjustment. The cold air volume of the damper keeps the temperature of the heat preservation chamber 131 constant.

As mentioned above, in the present embodiment, the latent heat of evaporation of the evaporator 153 is circulated in the thermal insulation chamber 131 by the cooling fan 152, and then by controlling the amount of cold air circulated by the mechanical damper 134 which detects the temperature of the thermal insulation chamber 131, The temperature of the heat preservation chamber 131 is kept constant, thereby, the temperature of the food in the heat preservation chamber box 132 can be kept constant, and the freshness preservation performance of the food can be improved.

In addition, in this embodiment, by changing the mechanical damper 134 to an electric damper, especially without restricting the set temperature (working temperature) of the mechanical damper 134, the heat preservation chamber 131 can be controlled at any temperature, forming a suitable temperature for each temperature. temperature of the food. In addition, it is possible to forcibly close the mechanical damper 134, which is not possible. When the heat preservation chamber 131 is not in use, it is not necessary to circulate cold air to the heat preservation chamber 131. By forcibly closing the electric damper, useless cooling is prevented and power consumption is suppressed.

In addition, when defrosting the evaporator 153 in the cooler chamber 151, by forcibly closing the electric damper, warm and humid air can be prevented from entering the heat preservation chamber 131, frosting can be prevented, and the defrosting efficiency can be improved to reduce power consumption.

In addition, in this embodiment, by changing the mechanical damper 134 to a fan in the heat preservation room with a variable speed, the amount of cold air to the heat preservation room 131 is adjusted without restricting the set temperature (working temperature) of the mechanical damper 134. The heat preservation chamber 131 is controlled at any temperature, and can form a temperature suitable for various foods. In addition, the cooling rate of rapid cooling, slow cooling, etc. can also be controlled, and the freshness of food can be improved.

Eighth embodiment

Fig. 10 is a cross-sectional view showing the vicinity of a heat preservation compartment of a refrigerator according to an eighth embodiment of the present invention. The same structures as those of the seventh embodiment are denoted by the same symbols and will not be described in detail.

In FIG. 10 , insulation compartment 131 and freezer compartment 141 are separated by partition plate 171 with built-in heater 175 . Partition plate 171 has a structure in which heat insulating material 174 is filled between bottom wall 172 of heat preservation compartment 131 and top wall 173 of freezer compartment 141 . In addition, a heater 175 is disposed in contact with the wall surface of the bottom wall 172 of the heat preservation chamber 131 , and the heat preservation chamber 131 has a heated wall surface heated by the heater 175 .

In addition, the refrigerating cycle of the refrigerator of this embodiment is the same as the refrigerating cycle of the seventh embodiment shown in FIG. 9 , and its detailed description is omitted.

The refrigerator of this embodiment formed as above around the parts different from the seventh embodiment will describe its operation and function in detail.

The conduction ratio of the heater 175 is adjusted by means of the mechanism for detecting the temperatures of the refrigerator compartment 121, the heat preservation compartment 131, and the freezer compartment 141, thereby changing the calorific value. The heater 175 is connected to the wall surface of the bottom wall 172 of the heat preservation chamber 131 , and the bottom wall 172 of the heat preservation chamber 131 becomes a heating wall surface to heat the heat preservation chamber box 132 in the heat preservation chamber 131 .

As mentioned above, in this embodiment, the conduction ratio of the heater 175 is adjusted by means of the mechanism for detecting the temperatures of the refrigerating chamber 121, the heat-retaining chamber 131, and the freezing chamber 141, so as to control the calorific value, so that the heat-retaining chamber 131 can be heated and the heat-retaining chamber 131 can be heated. The temperature of the food in the compartment case 132 is kept constant in the temperature zone above the refrigerator compartment temperature. In addition, the heating speed of the food can be controlled by adjusting the calorific value of the heater 175, and the usability can be improved.

Ninth embodiment

Fig. 11 is a cross-sectional view showing the periphery of a heat preservation compartment of a refrigerator according to a ninth embodiment of the present invention. The same structures as those of the seventh embodiment or the eighth embodiment are denoted by the same symbols and will not be described in detail.

In FIG. 11 , insulation compartment 131 and freezer compartment 141 are partitioned by partition 181 with built-in heater 175 . Partition plate 181 has a structure in which heat insulating material 174 is filled between bottom wall 172 of heat preservation compartment 131 and top wall 173 of freezing compartment 141 . In addition, a heater 175 is disposed in contact with the wall surface of the bottom wall 172 of the heat preservation chamber 131 , and the heat preservation chamber 131 has a heated wall surface heated by the heater 175 .

A channel 133 with a mechanical damper 134 is disposed on the back of the heat preservation chamber 131 . The channel 133 is connected to the channel 111 in the partition plate 181 , and the downstream side of the mechanical damper 134 forms a discharge port 135 facing into the heat preservation chamber 131 .

In addition, the refrigeration cycle structure of the refrigerator of this embodiment is the same as that of the seventh embodiment shown in FIG. 9 , and its detailed description is omitted.

The operation and function of the refrigerator of this embodiment formed as above will be described in detail around the parts different from the seventh embodiment or the eighth embodiment.

Part of the cold air discharged from the cooling fan 152 flows into the passage 111 on the back of the partition plate 181 and circulates to the passage 133 on the back of the heat preservation chamber 131 . The cold air flowing into the passage 133 is discharged from the outlet 135 to the heat preservation chamber box 132 through the mechanical damper 134 , and after heat exchange with the heat preservation chamber case 132 , it is inhaled from the passage 133 at the back and returns to the cooler chamber 151 . At this time, the heat-sensitive part of the mechanical damper 134 detects the temperature in the heat preservation chamber 131, and by changing the temperature of the heat preservation chamber 131, the temperature is controlled within the range of the set temperature (working temperature) of the mechanical damper 134 through mechanical adjustment. The cold air volume of the damper 134 keeps the temperature constant.

Furthermore, by adjusting the conduction ratio of the heater 175 by means of detecting the temperature of the refrigerator compartment 121, the heat preservation compartment 131, and the freezer compartment 141, the heat quantity is changed, and the heat preservation box 132 in the heat preservation compartment 131 is heated.

Furthermore, in this embodiment, the temperature of the heat preservation chamber 131 is fixed and maintained by controlling the amount of cold air circulating through the mechanical damper 134 that detects the temperature of the heat preservation chamber 131, and the temperature of the heat preservation chamber 121, the heat preservation chamber 131, and the freezer chamber 141 are detected. The temperature mechanism adjusts the conduction ratio of the heater 175 to change the calorific value, so that the food in the heat preservation chamber 132 can be kept at a precise fixed temperature.

In addition, the mechanical damper 134 of the present embodiment selects the electric damper to adjust the heat preservation chamber 131 at any temperature, and controls the heating value of the heater 175, so that the food in the food storage box 132 can be kept at a very high temperature. Precise arbitrary temperature. In addition, by adjusting the opening ratio of the electric damper and the heating value of the heater 175, food can be heated→cooled, and cooled→heated, thereby improving the processability of the food.

In addition, the fan of the heat preservation room can be selected by the mechanical adjustment damper 134 of this embodiment, the rotating speed of the fan of the heat preservation room can be changed, and the calorific value of the heater 175 can be controlled. temperature. In addition, cooling and heating speeds such as rapid cooling, slow cooling, rapid heating, and slow heating can also be controlled, and the freshness and processability of food can be improved.

Tenth embodiment

Fig. 12 is a cross-sectional view showing the vicinity of a heat preservation compartment of a refrigerator according to a tenth embodiment of the present invention. The same structures as those of the seventh embodiment, the eighth embodiment or the ninth embodiment are denoted by the same symbols and will not be described in detail.

In FIG. 12 , the refrigerator compartment 121 and the heat preservation compartment 131 are separated by a partition 191 having a channel 194 on the top surface. Partition plate 191 has a structure in which heat insulating material 195 is filled between bottom wall 192 of refrigerator compartment 121 and top wall 193 of heat preservation compartment 131 . In addition, a part of the heat insulating material 195 is removed to form a concave shape, and a ceiling passage 194 is formed between the wall surface of the ceiling wall 193 of the thermal insulation chamber 131 . In addition, the inside of the top passage 194 is connected to the air passage on the outlet side of the mechanical damper 134 of the back passage 133 of the heat preservation chamber 131 . In addition, a plurality of discharge ports 196 are formed on the top wall 193 of the heat preservation chamber 131 forming the top passage 194 .

In addition, since the refrigerating cycle of the refrigerator of this embodiment is the same as that of the refrigerating cycle of the seventh embodiment shown in FIG. 9, description thereof will be omitted.

The operation and function of the refrigerator of this embodiment formed as above will be described below around the parts different from the seventh embodiment, the eighth embodiment or the ninth embodiment.

Part of the cold air discharged by the cooling fan 152 flows into the passage 111 on the back of the partition plate 181 and circulates to the passage 133 on the back side of the heat preservation chamber 131 . The cool air flowing into the passage 133 is sent into the top passage 194 through the mechanical damper 134 . From the outlet 196 of the top wall 193 of the heat preservation chamber 131 that forms the top passage 194, it is discharged from the heat preservation chamber case 132, and after heat exchange with the heat preservation chamber case 132, it is sucked in from the passage 133 on the back and returns to the cooler chamber 151.

As mentioned above, in the embodiment of the present invention, the cold air passing through the mechanical damper 134 is discharged from the outlet 196 of the top wall 193 of the heat preservation chamber 131 through the top passage 194, thereby entering the heat preservation chamber 131 in a spraying manner. It is cooled inside, can reduce the temperature distribution deviation in the heat preservation chamber box 132, no matter where food is arranged, it can be kept at a fixed temperature evenly.

In addition, in this embodiment, by replacing the mechanical damper 134 with an electric damper, no matter where the food is placed, it can be kept at any very precise and uniform temperature. In addition, in this embodiment, by replacing the mechanical damper 134 with a heat preservation room fan, similarly to the above, no matter where the food is placed, it can be kept at any very precise and uniform temperature.

Eleventh embodiment

Fig. 13 is a cross-sectional view showing the vicinity of a heat preservation compartment of a refrigerator according to an eleventh embodiment of the present invention. In addition, the same structures as those of the seventh embodiment, the eighth embodiment, the ninth embodiment, or the tenth embodiment are denoted by the same symbols and will not be described in detail. In FIG. 13 , a fan 136 for stirring in the heat preservation chamber is disposed on the back of the heat preservation chamber case 132 in the heat preservation chamber 131 .

In addition, since the refrigerating cycle of the refrigerator of this embodiment is the same as that of the refrigerating cycle of the seventh embodiment shown in FIG. 9, description thereof will be omitted.

The operation and function of the refrigerator of this embodiment formed as above will be described below around the parts different from the seventh embodiment, the eighth embodiment, the ninth embodiment or the tenth embodiment.

By rotating the fan 136 for stirring in the heat preservation chamber, the air around the heat preservation chamber box 132 is stirred.

As mentioned above, in this embodiment, by rotating the fan 136 for stirring in the heat preservation chamber, the air around the heat preservation chamber box 132 can be stirred, the deviation of the temperature distribution in the heat preservation chamber 132 can be reduced, and no matter where the food is placed, it can be maintained. at a uniform fixed temperature. In addition, localized heating of the heater 175 can be prevented by the circulation of the air, and the variation in temperature distribution in the heat preservation chamber box 132 can be further reduced.

Twelfth embodiment

Fig. 14 is a cross-sectional view showing the vicinity of the heat preservation compartment of a refrigerator according to a twelfth embodiment of the present invention. In addition, the same structures as those of the seventh embodiment, the eighth embodiment, the ninth embodiment, the tenth embodiment, or the eleventh embodiment are denoted by the same symbols and will not be described in detail.

In FIG. 14 , refrigerating room 121 and warming room 131 are partitioned by partition 201 . Partition plate 201 has a structure in which heat insulating material 205 is filled between bottom wall 202 of refrigerator compartment 121 and top wall 203 of heat preservation compartment 131 . In addition, a part of the heat insulating material 205 is removed to form a concave shape, and a ceiling passage 204 is formed between the wall surface of the ceiling wall 203 of the thermal insulation chamber 131 . In addition, the inside of the top surface passage 204 is connected to the air passage on the outlet side of the mechanical damper 134 of the back passage 133 of the heat preservation chamber 131 and the return air passage to the cooler chamber 151 . Furthermore, an aluminum plate 206 is fitted into the top wall 203 of the heat preservation chamber 131 forming the top passage 204 .

In addition, since the refrigerating cycle of the refrigerator of the present embodiment has the same structure as that of the refrigerating cycle of the seventh embodiment shown in FIG. 9, description thereof will be omitted.

The operation and function of the refrigerator of this embodiment formed as above will be described below around the parts different from the seventh embodiment, the eighth embodiment, the ninth embodiment, the tenth embodiment or the eleventh embodiment.

Part of the cold air discharged by the cooling fan 152 flows into the passage 111 on the back of the partition plate 181 and circulates to the passage 133 on the back side of the heat preservation chamber 131 . The cool air flowing into the passage 133 is sent into the top passage 204 through the mechanical damper 134 . The aluminum plate 206 of the top wall 203 of the heat preservation chamber 131 forming the top passage 204 is cooled by the cold air flowing therethrough, and the heat preservation chamber box 132 below is cooled by natural convection. The cold air flowing through the top channel 204 returns to the cooler chamber 151 through the return air path of the channel 133 on the back.

As mentioned above, in this embodiment, the cold air passing through the mechanical damper 134 flows through the top wall 204 to cool the aluminum plate 206 embedded in the top wall 203 of the heat preservation chamber 131, thereby cooling the heat preservation chamber 131 by natural convection. Since cold air is directly circulated in the heat-retaining chamber 131, a decrease in humidity in the heat-retaining chamber 131 and drying of food can be suppressed.

Thirteenth embodiment

Fig. 15 is a cross-sectional view showing the vicinity of the heat preservation compartment of a refrigerator according to a thirteenth embodiment of the present invention. In addition, the same structures as those of the seventh embodiment, the eighth embodiment, the ninth embodiment, the tenth embodiment, the eleventh embodiment, or the twelfth embodiment are denoted by the same symbols and will not be described in detail.

In FIG. 15, the cooler compartment 151 in the freezer compartment 141 is partitioned by a partition plate 212 having a heat insulating effect. A cooling fan 211 whose rotational speed can be changed is embedded in the partition plate 212 . An evaporator 153 and a defrosting heater 154 are arranged in the cooler chamber 151 . Formed on the partition 212 is the discharge port 143 that discharges the cold air discharged from the cooling fan 211 with variable rotation speed to the freezer compartment 142 in the freezer compartment 141, and also forms a passage connected to the heat preservation chamber 131 on the back side of the partition 110. 111 connected wind road.

The following describes the operation of the refrigerator of this embodiment formed as above around the parts different from the seventh embodiment, the eighth embodiment, the ninth embodiment, the tenth embodiment, the eleventh embodiment or the twelfth embodiment. ,effect.

Cool air is discharged from the evaporator 153 in the cooler chamber 151 by the cooling fan 211 with variable rotation speed, passes through the air passage in the partition plate 212 , and is discharged from the discharge port 143 to the freezer compartment case 142 . The discharged cold air is sucked from the lower part of the partition plate 212 after exchanging heat with the freezer compartment case 142 .

In addition, the cold air discharged by the variable-speed cooling fan 211 passes through the air passage in the partition 212 , partly flows into the passage 111 on the back of the partition 110 , and circulates to the passage 133 on the back of the heat preservation chamber 131 .

As mentioned above, in this embodiment, the cooling fan with variable speed is selected as the cooling fan, so that the speed can be changed. Thus, when food to be cooled is put into the heat preservation chamber 131 and the freezer chamber 141, the speed of the variable cooling fan 211 is increased to increase cold air to the heat preservation chamber 131 and the freezer chamber 141, so that the heat preservation chamber 131 and the freezer chamber can be rapidly cooled. Food within 141.

When the heat preservation compartment 131 and the freezer compartment 141 are sufficiently cooled, the power consumption of the variable-rotation cooling fan 211 can be reduced by reducing the rotation speed of the variable-rotation cooling fan 211 and reducing the input. Furthermore, by reducing the rotational speed of the rotational speed variable cooling fan 211, the noise of the rotational rotational speed variable cooling fan 211 can also be reduced, and noise reduction can be achieved.

In the refrigerator of the present invention, by independently cooling the refrigerator compartment and the freezer compartment, the temperature in each compartment can be kept at a predetermined temperature without interfering with each other. In addition, it can provide independent heat preservation chambers, and by controlling them at the set temperature, the freshness of food can be improved, and a refrigerator with excellent performance and low price can be used.

Claims (5)

1. A refrigerator comprising a refrigerating chamber cooled by a direct cooling method, a freezer chamber cooled by an indirect cooling method, and an insulated chamber, a cooler for generating cold air for cooling the box, and a cooler disposed on the cooler An upper cooling fan and a cooler chamber in which a cooler cover is provided in front of the cooler and accommodates the cooler, The refrigerator has the refrigerating chamber, the heat preservation chamber, and the freezing chamber from top to bottom, A passage connected to the cooler chamber and an air passage provided with a damper in the passage are formed on the back side of the heat preservation chamber, and between the bottom wall of the refrigerating chamber and the top wall of the heat preservation chamber fill the space with heat insulating material, and form a top channel between the heat insulating material and the wall surface of the top wall, A plurality of outlets are provided in the top passage, and the plurality of outlets are used to discharge cold air sent to the top passage through the passage into the heat preservation chamber, The temperature of the heat preservation chamber is maintained at a specified temperature by using the channel, and it is characterized in that, The refrigerator also has a heater connected to the bottom wall of the heat preservation chamber, and an outside air temperature detection sensor installed outside the refrigerator to detect the temperature of the outside air, The outside air temperature detection sensor changes the heating value of the heater. 2. The refrigerator according to claim 1, wherein the damper is any one of a mechanical damper or an electric damper. 3. The refrigerator according to claim 1, characterized in that a fan for stirring in the heat preservation chamber is further provided in the heat preservation chamber. 4. The refrigerator according to claim 1, characterized in that, an air path composed of aluminum plates and channels is formed on the top surface of the heat preservation chamber. 5. The refrigerator according to claim 1, wherein the rotation speed of the cooling fan is variable.

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