JP2007255740A - Refrigerator - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a refrigerator, efficiently cooling the respective storing chambers. <P>SOLUTION: This refrigerator 1 includes: a first storage chamber 2a; a coldness storage type freezer having a cooler 4 for generating cold air; a blowing air duct 8 for sending the generated cold air from the cooler 4 to the first storage chamber 2a; a return air duct 9 for returning the cold air from the first storage chamber 2a to the cooler; a second storage chamber 2b controlled to a temperature higher than the temperature of the first storage chamber 2a; and a damper 5b provided in the return air duct 9 for introducing the cold air into the second storage chamber 2b, wherein the damper 5b is constructed to switch between the open state where the total quantity of cold air is returned from the first storage chamber 2a through the second storage chamber 2b to the cooler 4 and the close state where the total quantity of cold air is returned from the first storage chamber 2a directly to the cooler 4. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a refrigerator using a regenerative refrigerator such as a Stirling refrigerator or a pulse tube refrigerator.

A known refrigerator relating to the present invention is described in Patent Document 1 described later. FIG. 5 is a diagram showing the configuration of the refrigerator described in Patent Document 1, and FIG. 6 is a sectional view taken along line XX in FIG. The refrigerator 101 includes three storage chambers 102 a, 102 b, 102 c having different indoor temperatures and a Stirling refrigerator 103, and a heat sink 104 of the Stirling refrigerator 103 is provided with a cooler 106 via a heat conduction plate 105. ing. The inlet 106a of the cooler 106 is connected to one end of the return air passages 109a, 109b, and 109c, and the outlet 106b of the cooler 106 is connected to one end of the feed air passages 108a, 108b, and 108c. Dampers 110a, 110b, and 110c are disposed in the middle of the feed air passages 108a, 108b, and 108c, respectively. The other ends of the feed air passages 108a, 108b, 108c are connected to the storage chambers 102a, 102b, 102c, respectively, and the other ends of the return air passages 109a, 109b, 109c are connected to the storage chambers 102a, 102b, 102c. . The cool air generated by the cooler 106 is blown by the blower 107 and flows into the storage chambers 102a, 102b, and 102c through the feed air passages 108a, 108b, and 108c. After cooling the storage chambers 102a, 102b, 102c, the cool air returns to the inlet 106a of the cooler 106 through the return air passages 109a, 109b, 109c, and is cooled again by the cooler 106.
JP 2003-279222 A

  In the above-described refrigerator, a feed air path and a return air path are provided in each of the plurality of storage rooms. Usually, in a refrigerator, a space for providing an air passage is limited due to restrictions such as external dimensions and storage room capacity. Therefore, if the air passage is provided for each storage chamber, there is a possibility that a sufficient cross-sectional area cannot be secured in each air passage. In the air passage, the pressure loss increases as the cross-sectional area of the flow path decreases. When the pressure loss of the air passage increases, the flow rate of the cool air sent to the storage chamber at a time decreases, and it becomes difficult to efficiently cool each storage chamber.

  Therefore, this invention is made | formed in view of said problem, and makes it a subject to provide the refrigerator which can cool each store room efficiently.

  In order to solve the above-mentioned problem, the technical means taken in the present invention is, as described in claim 1, a first storage chamber, a regenerative refrigerator having a cooler for generating cold air, A feed air passage that sends the generated cold air from the cooler to the first storage chamber, and the cold air from the first storage chamber to circulate the cold air between the cooler and the first storage chamber. A return air path that returns to the cooler; a second storage chamber that communicates with the return air path and is controlled to a temperature higher than the temperature of the first storage chamber; and is provided in the return air path; A refrigerator for introducing into the second storage chamber, and the damper is in an open state in which the entire amount of the cold air is returned from the first storage chamber to the cooler via the second storage chamber; And any of the closed states in which the entire amount of the cold air is returned directly from the first storage chamber to the cooler. It is that you have configured to be switched to the people.

  Preferably, as described in claim 2, the first storage chamber may be provided above the second storage chamber in the vertical direction.

  Preferably, as described in claim 3, when the damper is in the closed state, the cool air generated in the cooling unit may be sent only to the first storage chamber.

  Preferably, as described in claim 4, the apparatus further comprises a first temperature sensor for measuring the temperature of the first storage chamber, and the input of the regenerator type refrigerator according to the temperature measured by the first temperature sensor. Should be controlled.

  Preferably, as described in claim 5, further comprising a second temperature sensor for measuring the temperature of the second storage chamber, and the damper is in the open state according to the temperature measured by the second temperature sensor. It may be switched to either one of the closed states.

  In order to solve the above-mentioned problem, the technical means taken in the present invention includes, as described in claim 6, a first storage chamber, a refrigerator having a cooler for generating cold air, A circulation air passage that communicates with one storage chamber and through which the cool air generated by the cooler circulates, a first damper that is provided in the circulation air passage and introduces the cold air into the first storage chamber, and the circulation A second storage chamber that communicates with the air passage and is controlled to a temperature different from the temperature of the first storage chamber; a second damper that is provided in the circulation air passage and introduces the cold air into the second storage chamber; This is a configuration in which the refrigerator is provided.

  According to the first aspect of the present invention, the cool air generated by the cooler is sent to the first storage chamber via the feed air passage, and then from the first storage chamber to the cooler via the return air passage. Returned. The return air passage communicates with the second storage chamber controlled to a temperature higher than that of the first storage chamber, and the return air passage is provided with a damper for introducing cool air into the second storage chamber. In this structure, the feed air passage and the return air passage not only serve as an air passage for circulating cool air between the cooler and the first storage chamber, but also cool air between the cooler and the second storage chamber. It also functions as a wind path for circulation. That is, the first storage chamber and the second storage chamber share the feed air passage and the return air passage. Therefore, the refrigerator of the present invention does not require an air passage for sending cold air from the cooler to the second storage chamber and an air passage for returning cold air from the second storage chamber to the cooler, and the refrigerator is limited. In the space, the cross-sectional area of two air paths (feed air path and return air path) for sending cool air can be secured to the maximum. Thereby, since the pressure loss in an air path is reduced, the flow volume of the cold air in an air path is fully ensured, and efficient cooling of each store room is attained. In addition to the first storage chamber and the second storage chamber, for example, even when a third storage chamber and a fourth storage chamber that are controlled to temperatures different from these storage chambers are provided, By providing a corresponding damper in the return air passage, the four storage chambers can share the feed air passage and the return air passage, so that each storage compartment can be efficiently cooled regardless of the number of storage compartments.

  According to the invention described in claim 6, the cold air generated by the cooler circulates in the circulation air passage. The circulation air passage communicates with the first storage chamber and the second storage chamber controlled to a temperature different from the temperature of the first storage chamber. The cool air circulating through the circulation air passage is introduced into the first storage chamber by the first damper and is introduced into the second storage chamber by the second damper. In this structure, the circulation air passage not only serves as an air passage for circulating cold air between the cooler and the first storage chamber, but also for circulating cold air between the cooler and the second storage chamber. It also functions as an air path. That is, the first storage chamber and the second storage chamber share a circulation air path. Therefore, the refrigerator of the present invention only needs to have one air path for circulating the cold air generated in the cooler, and the air path (circulation) for sending the cold air in a limited space of the refrigerator. The cross-sectional area of the air path) can be maximized. Thereby, since the pressure loss in an air path is reduced, the flow volume of the cold air in an air path is fully ensured, and efficient cooling of each store room is attained. In addition to the first storage chamber and the second storage chamber, for example, even when a third storage chamber and a fourth storage chamber that are controlled to temperatures different from these storage chambers are provided, By providing the corresponding damper in the circulation air passage, the four storage chambers can share the circulation air passage, and therefore, each of the storage compartments can be efficiently cooled regardless of the number of the storage compartments.

Example 1
FIG. 1 is a diagram illustrating a configuration of a refrigerator 1 according to a first embodiment of the present invention, and is an embodiment in which three storage rooms having different indoor temperatures are provided. 2 is a cross-sectional view taken along the line AA in FIG. A regenerator type refrigerator 3 such as a Stirling refrigerator or a pulse tube refrigerator is provided below the refrigerator 1. The cool storage type refrigerator 3 is provided with a cooler 4 for generating cold air. The first storage chamber 2a, the second storage chamber 2b, and the third storage chamber 2c are stored in the refrigerator 1 sequentially from the upper side to the lower side in the vertical direction. The set temperature of each storage room becomes higher in the order of the first storage room 2a, the second storage room 2b, and the third storage room 2c. For example, the set temperature of each storage chamber is set to -60 ° C for the first storage chamber 2a, -40 ° C for the second storage chamber 2b, and -20 ° C for the third storage chamber 2c. The first storage chamber 2a, the second storage chamber 2b, and the third storage chamber 2c are provided with temperature sensors 7a to 7c and doors 12a to 12c, respectively.

 In the first storage chamber 2a, the second storage chamber 2b, and the third storage chamber 2c, there are channel ports 10a, 10b, and 10c for injecting cool air, and channel ports 11a, 11b, and 11c for allowing cool air to flow out, respectively. It is provided. The flow path port 10 a is connected to the outlet 4 b of the cooler 4 in the regenerative refrigerator 3 through the feed air path 8, and the flow path port 11 a is connected to the inlet 4 a of the cooler 4 through the return air path 9. Has been. The channel port 11a, the channel port 10b, the channel port 11b, the channel port 10c, and the channel port 11c are sequentially connected to the return air channel 9 according to the flow direction of the cold air.

 In the middle of the return air passage 9, dampers 5 b and 5 c are provided in the order of the flow direction of the return air passage 9. The damper 5b conducts / cuts off the return air passage 9 and the flow passage port 10b, and the damper 5c conducts / cuts off the return air passage 9 and the flow passage port 10c. When the damper 5b is in the open state, the return air passage 9 and the flow passage opening 10b are electrically connected, and the entire amount of cool air flowing through the return air passage 9 is introduced into the second storage chamber 2b. When the damper 5b is in the closed state, the return air passage 9 and the flow passage opening 10b are blocked, and the cold air flowing through the return air passage 9 is not introduced into the second storage chamber 2b. The damper 5b is switched to either the open state or the closed state. The damper 5c is the same as the damper 5b. When the damper 5c is in the open state, the return air passage 9 and the flow passage port 10c are electrically connected, and the entire amount of cold air flowing through the return air passage 9 is introduced into the third storage chamber 2c. The When the damper 5c is in the closed state, the return air passage 9 and the flow passage opening 10c are blocked, and the cold air flowing through the return air passage 9 is not introduced into the third storage chamber 2c. Similarly to the damper 5b, the damper 5c is switched to either the open state or the closed state. When both of the dampers 5b and 5c are in the open state, the return air passage 9 is returned upstream from the upstream side by the dampers 5b and 5c, the return air passage upstream side 9a, the return air passage midstream side 9b, and the return air passage downstream side. 9c is divided into three.

 A blower 6 is provided in the feed air passage 8. In addition, the installation place of the air blower 6 is not limited to this place, and may be any place as long as it can circulate cold air. For example, it may be disposed at the inlet 4a of the cooler 4, and in the case of the present embodiment, may be the flow path port 10a of the first storage chamber 2a.

 In the refrigerator 1, with respect to the vertical direction, the first storage chamber 2a, the second storage chamber 2b, and the third storage chamber 2c are accommodated sequentially from the top to the bottom, and the set temperatures of the storage chambers 2a, 2b, and 2c are The first storage chamber 2a, the second storage chamber 2b, and the third storage chamber 2c increase in this order. The cold air flowing through the storage chambers 2a, 2b, and 2c increases in temperature from the upper side to the lower side and decreases in density from the upper side to the lower side in the vertical direction. Accordingly, the cool air naturally flowing through the return air passage 9 flows downward in the vertical direction due to the action of gravity, so that the required power of the blower 6 can be reduced.

  Next, the operation of this embodiment will be described. The operation of the regenerative refrigerator 3 such as a Stirling refrigerator or a pulse tube refrigerator is well known and will not be described.

  The temperatures of the first storage chamber 2a, the second storage chamber 2b, and the second storage chamber 2c are set to, for example, −60 ° C., −40 ° C., and −20 ° C., respectively. When each storage room is 2 ° C. or more higher than each set temperature (case 1), the cold storage type refrigerator 3 and the blower 6 are in operation, and the refrigerator 1 is in a cooling operation state. At this time, the dampers 5b and 5c are all in an open state, and the flow passage openings 10b and 10c are electrically connected to the return air passage 9. Accordingly, the entire amount of the cool air sent by the blower 6 is the feed air passage 8, the first storage chamber 2a, the return air passage upstream side 9a, the second storage chamber 2b, the return air passage midstream side 9b, the third storage chamber 2c, and the return air. It returns to the cooler 4 through the air path downstream side 9c, and is cooled again there. The cold air that has flowed into the first storage chamber 2a, the second storage chamber 2b, and the third storage chamber 2c cools each storage chamber and lowers the temperature of each storage chamber. At this time, the temperature of the cool air rises by heat exchange in each storage room. In case 1, since the total amount of cold air generated by the cooler 4 (flow rate blown by the blower 6) flows into the first storage chamber 2a, the second storage chamber 2b, and the third storage chamber 2c, the first storage Heat transfer is performed well in the chamber 2a, the second storage chamber 2b, and the third storage chamber 2c, and the cooling amount of each storage chamber is improved.

  In case 1, time elapses, the third storage chamber 2c reaches 2 ° C. lower than the set temperature (−22 ° C.), and the first storage chamber 2a and the second storage chamber 2b are still 2 ° C. higher than the set temperature ( In each case (−58 ° C., −38 ° C. or higher) (case 2), the damper 5c is switched to the closed state, and the damper 5b is maintained in the open state. At this time, in the flow path port 10b, the conduction state with the return air path upstream side 9a is maintained. Therefore, the entire amount of the cool air sent by the blower 6 is the feed air passage 8, the first storage chamber 2a, the return air passage 9 upstream side 9a, the second storage chamber 2b, the return air passage midstream side 9b, and the return air passage downstream side 9c. It returns to the cooler 4 through and is cooled again. The cool air flowing into the first storage chamber 2a and the second storage chamber 2b cools the first storage chamber 2a and the second storage chamber 2b, and lowers the temperatures of the first storage chamber 2a and the second storage chamber 2b. At this time, the temperature of the cold air rises due to heat exchange in the first storage chamber 2a and the second storage chamber 2b. In the case 2, for the same reason as the case 1, heat transfer is performed well in the first storage chamber 2a and the second storage chamber 2b, and the cooling amount of the first storage chamber 2a and the second storage chamber 2b is improved. .

 Further, time elapses, the second storage chamber 2b reaches 2 ° C. lower than the set temperature (−42 ° C.), the third storage chamber 2c maintains the range of −22 ° C. to −18 ° C., and the first storage chamber When 2a is still higher than the set temperature by 2 ° C. or more (−58 ° C. or more) (case 3), the damper 5b is switched to the closed state, and the damper 5c maintains the closed state. At this time, the flow path port 10b is blocked from the upstream side 9a of the return air path. Accordingly, all the cool air sent by the blower 6 passes through the feed air passage 8, the first storage chamber 2a, the return air passage upstream side 9a, the return air passage middle flow side 9b, and the return air passage downstream side 9c to the cooler 4. Return and cool again. The cold air flowing into the first storage chamber 2a cools the first storage chamber 2a and lowers the temperature of the first storage chamber 2a. At this time, the temperature of the cold air rises due to heat exchange in the first storage chamber 2a. Also in case 3, for the same reason as in case 1 and case 2, heat transfer is performed well in the first storage chamber 2a, and the cooling amount of the first storage chamber 2a is improved.

  In the refrigerator 1 of the first embodiment, the first storage chamber 2 a, the second storage chamber 2 b, and the third storage chamber 2 c share the feed air passage 8 and the return air passage 9, and the cold air generated by the regenerator type refrigerator 3. Is circulated without diverting the feed air path 8 and the return air path 9. Therefore, since it is not necessary to provide an independent air passage in each of the storage chambers 2a to 2c, the flow passage cross-sectional areas of the feed air passage 8 and the return air passage 9 can be sufficiently secured in the limited space of the refrigerator 1, Pressure loss in the feed air path 8 and the return air path 9 is reduced. Thereby, since an appropriate flow rate of the cold air flowing into the storage chambers 2a to 2c can be secured, the heat transfer of the cold air in the storage chambers 2a to 2c is improved, and the cooling amount of the storage chambers 2a to 2c is improved.

  Further, although there are three storage chambers 2a to 2c, it is only necessary to provide one feed air passage 8 and one return air passage 9 and one damper 5a and 5b, respectively. The number of points is reduced and the structure is simplified.

  Moreover, the temperature of the 2nd storage chamber 2b and the 3rd storage chamber 2c is measured with the temperature sensors 7b and 7c, respectively, and the dampers 5b and 5c are either an open state or a closed state according to the measured temperature of the temperature sensors 7b and 7c. Therefore, the temperatures of the second storage chamber 2b and the third storage chamber 2c can be maintained within the set temperature range, and the second storage chamber 2b and the third storage chamber 2c are too cold or too warm. The storage chambers 2b and 2c can be efficiently cooled.

  When only the first storage chamber 2a is desired to be cooled in a short time (case 4), the dampers 5b and 5c are all switched to the closed state regardless of the temperatures of the second storage chamber 2b and the third storage chamber 2c. As a result, the flow path port 10b is blocked from the return air path upstream side 9a, and the flow path port 10c is blocked from the return air path midstream side 9b. Therefore, all the cool air sent by the blower 6 passes through the cooler 4 through the feed air passage 8, the first storage chamber 2a, the return air passage 9 upstream side 9a, the return air passage middle flow side 9b, and the return air passage downstream side 9c. And then cooled again. The cold air flowing into the first storage chamber 2a cools the first storage chamber 2a and lowers the temperature of the first storage chamber 2a. At this time, the temperature of the cold air rises due to heat exchange in the first storage chamber 2a. In case 4, the dampers 5 b and 5 c are both switched to the closed state regardless of the temperatures of the second storage chamber 2 b and the third storage chamber 2 c, and the cold air generated by the cooler 4 passes only the first storage chamber 2 a. Cooling. Thereby, the cooling amount of the 1st storage chamber 2a increases by the cooling amount of the 2nd storage chamber 2b and the 3rd storage chamber 2c, and the quick freezing of the 1st storage chamber 2a is attained.

(Example 2)
Next, a second embodiment of the present invention will be described. FIG. 3 is a diagram illustrating the configuration of the refrigerator 19 according to the second embodiment of the present invention, and is an embodiment in which three storage rooms having different indoor temperatures are provided. 4 is a cross-sectional view taken along the line BB in FIG. In addition, the same code | symbol is attached | subjected to the member of the same name as the member shown by FIG.1 and FIG.2 of Example 1. FIG. Moreover, description is abbreviate | omitted about the structure and effect | action same as FIG.1 and FIG.2, and a different structure and effect | action are demonstrated using FIG.3 and FIG.4.

  In the refrigerator 19, the upstream end of the circulation air passage 20 is connected to the outlet 4 b of the cooler 4 provided in the regenerative refrigerator 3, and the downstream end of the circulation air passage 20 is connected to the inlet 4 a of the cooler 4. Yes. The first storage chamber 2a, the second storage chamber 2b, and the third storage chamber 2c are supplied with a first flow path port 10d, a second flow path port 10e, and a third flow path port 10f for allowing cold air to flow into them. The first flow path port 11d, the second flow path port 11e, and the third flow path port 11f are provided. The first flow path port 10d, the first flow path port 11d, the second flow path port 10e, the second flow path port 11e, the third flow path port 10f, and the third flow path port 11f are sequentially connected to the circulation air path 20 according to the flow direction of the cold air. Is done.

 In the middle of the circulation air passage 20, a damper 5a, a damper 5b, and a damper 5c are provided in the order of the flow direction of the cold air. The dampers 5a, 5b, and 5c conduct and block the circulation air passage 20 and the first passage opening 10d, the circulation air passage 20 and the second passage opening 10e, and the circulation air passage 20 and the third passage opening 10f, respectively. When the damper 5a is in the open state, the circulation air passage 20 and the first passage opening 10d are brought into conduction, and the entire amount of cool air flowing through the circulation air passage 20 is introduced into the first storage chamber 2a. When the damper 5a is in the closed state, the circulation air passage 20 and the first passage opening 10d are blocked, and the cold air flowing through the circulation air passage 20 is not introduced into the first storage chamber 2a. The damper 5a is switched to either the open state or the closed state. Note that the operation of the dampers 5b and 5c is the same as that of the damper 5a, and the description thereof is omitted here.

  The configuration of the second embodiment is different from the first embodiment in that the upper part of the feed air path 8 and the upper part of the feed air path 9 communicate with each other to form one circulation air path 20, and a damper is provided in the circulation air path 20. 5a is installed, and the damper 5a conducts / blocks the circulation air passage 20 and the first flow passage port 10d of the first storage chamber 2a. As in the first embodiment, the set temperatures of the first storage chamber 2a, the second storage chamber 2b, and the third storage chamber 2c are set to −60 ° C., −40 ° C., and −20 ° C., respectively. Further, the operation of the second embodiment is different from the first embodiment in that the cool air generated by the cooler 4 does not flow through the first storage chamber 2a depending on the open / close state of the damper 5a. For example, when the first storage chamber 2a reaches a temperature 2 ° C. or more lower than the set temperature (−62 ° C. or less), the damper 5a is switched to the closed state, and the circulation air passage 20 and the first flow passage port 10d are connected. The cold air that is blocked and blown by the blower 6 does not flow into the first storage chamber 2a.

In the structure of the second embodiment, after the first storage chamber 2a having the lowest set temperature reaches the set temperature, the cool air is not sent to the first storage chamber 2a, and the set temperature is higher than that of the first storage chamber 2a. Cold air is sent to the second storage chamber 2b and the third storage chamber 2c. In this case, the regenerative refrigerator 3 does not need to generate enough cold air to cool the first storage chamber 2a, and may generate cold air having a higher temperature. Thereby, the input (voltage or electric current, rotation speed) to the cool storage type refrigerator 3 can be small, and the required power of the cool storage type refrigerator 3 can be reduced.
As described above, according to the refrigerator 1 according to the first embodiment, the cold air generated by the cooler 4 of the regenerator type refrigerator 3 is sent to the first storage chamber 2a via the feed air passage 8. The first storage chamber 2a is returned to the cooler 4 through the return air passage 9. The return air passage 9 communicates with the second storage chamber 2b and the third storage chamber 2c which are controlled to a temperature higher than the temperature of the first storage chamber 2a, and the return air passage 9 has cold air to the second storage chamber 2b. A damper 5b for introduction and a damper 5c for introducing cold air into the third storage chamber 2c are provided. In this structure, the feed air passage 8 and the return air passage 9 are not only air passages for circulating cool air between the cooler 4 and the first storage chamber 2a, but also the cooler 4 and the second storage chamber 2b. Also, it functions as an air path for circulating cold air between the cooler 4 and the third storage chamber 2c. That is, the first storage chamber 2a, the second storage chamber 2b, and the third storage chamber 2c share the feed air passage 8 and the return air passage 9. Therefore, the refrigerator 1 according to the first embodiment of the present invention includes an air passage for sending cold air from the cooler 4 to the second storage chamber 2b and the third storage chamber 2c, and the second storage chamber 2b and the third storage chamber 2c. The flow of the two air passages (feed air passage 8 and return air passage 9) for sending the cold air in the limited space of the refrigerator 1 without requiring the air passage for returning the cold air to the cooler 4 Maximum road cross-sectional area can be secured. Thereby, since the pressure loss in an air path is reduced, the flow volume of the cold air in an air path is fully ensured, and the cooling of the storage chambers 2a-2c is attained. In addition to the first storage chamber 2a, the second storage chamber 2b, and the third storage chamber 2c, for example, a fourth storage chamber and a fifth storage chamber that are controlled at temperatures different from those storage chambers are provided. However, by providing dampers corresponding to these storage chambers in the return air passage 9, five storage chambers can share the feed air passage 8 and the return air passage 9, so that each storage can be performed regardless of the number of storage chambers. Efficient cooling of the chamber is possible.

  Further, according to the refrigerator 19 according to the second embodiment, the cold air generated by the cooler 4 of the regenerator type refrigerator 3 circulates in the circulation air passage 20. The circulation air passage 20 communicates with the first storage chamber 2a and the second storage chamber 2b and the third storage chamber 2c which are controlled to a temperature different from the temperature of the first storage chamber 2a. The cold air circulating through the circulation air passage 20 is introduced into the first storage chamber 2a by the damper 5a and introduced into the second storage chamber 2b and the third storage chamber 2c by the dampers 5b and 5c, respectively. In this structure, the circulation air passage 20 is not only an air passage for circulating cold air between the cooler 4 and the first storage chamber 2a, but also the cooler 4, the second storage chamber 2b, the cooler 4, and the like. It also functions as an air passage for circulating cold air between the third storage chamber 2c. In other words, the first storage chamber 2 a, the second storage chamber 2 b, and the third storage chamber 2 c share the circulation air path 20. Therefore, the refrigerator 19 according to the second embodiment of the present invention only needs to have one air path for circulating the cool air generated in the cooler 4, and the cool air is limited in the limited space of the refrigerator 19. The cross-sectional area of the air passage for circulating the air (circulation air passage 20) can be maximized. Thereby, since the pressure loss in an air path is reduced, the flow volume of the cold air in an air path is fully ensured, and the cooling of the storage chambers 2a-2c is attained. In addition to the first storage chamber 2a, the second storage chamber 2b, and the third storage chamber 2c, for example, a fourth storage chamber and a fifth storage chamber that are controlled at temperatures different from those storage chambers are provided. However, by providing dampers corresponding to these storage chambers in the circulation air passage 20, since the five storage chambers can share the circulation air passage, efficient cooling of each storage chamber regardless of the number of storage chambers. Is possible.

The figure which shows the structure of the refrigerator 1 which concerns on Example 1 of this invention. AA sectional drawing of FIG. The figure which shows the structure of the refrigerator 19 which concerns on Example 2 of this invention. BB sectional drawing of FIG. The figure which shows the structure of a well-known refrigerator. XX sectional drawing of FIG.

Explanation of symbols

1 Refrigerator
2a 1st storage room 2b 2nd storage room 2c 3rd storage room 3 Cold storage type refrigerator 4 Cooler 5a Damper (1st damper)
5b Damper (second damper)
5c Damper 7a Temperature sensor (first temperature sensor)
7b Temperature sensor (second temperature sensor)
7c Temperature sensor 8 Feed air passage 9 Return air passage 19 Refrigerator 20 Circulation air passage

Claims (6)

A first storage room;
A regenerative refrigerator having a cooler for generating cold air;
A feed air passage for sending the generated cold air from the cooler to the first storage chamber;
A return air path for returning the cold air from the first storage chamber to the cooler to circulate the cold air between the cooler and the first storage chamber;
A second storage chamber that communicates with the return air passage and is controlled at a temperature higher than the temperature of the first storage chamber;
A damper provided in the return air passage for introducing the cold air into the second storage chamber;
With
The damper is in an open state in which the total amount of cold air is returned from the first storage chamber to the cooler via the second storage chamber, and the total amount of cold air is directly transferred from the first storage chamber to the cooler. A refrigerator that is switched to one of the closed states to be returned.   The refrigerator according to claim 1, wherein the first storage room is provided above the second storage room in the vertical direction.   The refrigerator according to claim 1, wherein when the damper is in the closed state, the cold air generated in the cooling unit is sent only to the first storage chamber.   2. The apparatus according to claim 1, further comprising a first temperature sensor that measures a temperature of the first storage chamber, wherein the input of the regenerator is controlled according to a temperature measured by the first temperature sensor. Refrigerator.   A second temperature sensor for measuring the temperature of the second storage chamber, wherein the damper is switched between the open state and the closed state according to the temperature measured by the second temperature sensor; The refrigerator according to claim 1. A first storage room;
A refrigerator having a cooler for generating cold air;
A circulation air passage that communicates with the first storage chamber and through which the cool air generated by the cooler circulates;
A first damper provided in the circulation air passage, for introducing the cold air into the first storage chamber;
A second storage chamber that communicates with the circulation air passage and is controlled to a temperature different from the temperature of the first storage chamber;
A second damper provided in the circulation air passage, for introducing the cold air into the second storage chamber;
A refrigerator comprising:

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