JPH0664079U - Refrigerator with two refrigerator compartments - Google Patents

Abstract

(57) [Summary] [PROBLEMS] To provide a refrigerating device with a reliable operation and a simple structure, which can stably control two separate refrigerating chambers at different temperatures close to each other. [Structure] The refrigerating device has two heat exchangers 10 and 13 installed in separate refrigerating chambers, a brine tank 30 fluidly connected to the heat exchangers, and a cooling pipe 4 for cooling brine. . The brine tank is divided into a first tank portion 30a and a second tank portion 30b corresponding to two heat exchangers by a partition wall 32, the cooling pipe 4 is immersed in the first tank portion 30a, and the second tank portion 30b. A partition plate 34 divides the inside into a high temperature region where the brine from the heat exchanger 13 returns and a low temperature region where the brine is supplied from the first tank portion 30a through the circulation pump 15, and the lower opening 34a of the partition plate.
And the flow guide plate 33 provided on the side of the second tank portion of the partition wall cooperate with each other to form a brine return flow path from the high temperature area to the upper portion of the first tank portion through the cold temperature area.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a refrigerating machine, and more particularly to a refrigerating machine brine tank having two refrigerating chambers maintained at different temperatures.

[0002]

[Prior art]

 For example, when refrigerating a plurality of refrigerated items at different temperatures close to each other, it is common to use two separate refrigerating chambers, but it is effective to use one refrigerating device or freezing unit. . That is, by devising a brine tank for supplying brine to the heat exchanger provided in each refrigerating room, the brine inside is cooled by one freezing unit. As an example thereof, FIG. 10 shows a tank structure (No. Sho 63-147677) developed by the present applicant. In the figure, a brine tank 1 is divided into a first tank portion 1a and a second tank portion 1b by a partition wall 2, and the brine in the first tank portion 1a is directly cooled by a freezing portion 3. A part of the brine in the first tank portion 1a is sent to the first heat exchanger 10 in the first refrigerating compartment by the first circulation pump 9 to cool the inside of the first refrigerating compartment (not shown). The brine heated by the heat exchange returns to the first tank unit 1a. Similarly, the brine in the second tank portion 1b is sent to the second heat exchanger 13 by the second circulation pump 12, cools the inside of the second refrigerating chamber (not shown), and then returns to the second tank portion 1b. Further, the cooled brine in the first tank portion 1a is sent to the second tank portion 1b by the third circulation pump 15 and is mixed there with the brine in the second tank portion 1b. The mixed brine is sent to the second heat exchanger 13 as described above, but part of the brine returns to the first tank portion 1a from the lower opening 2a of the partition wall 2. Since the flow rate of the lower opening 2a of the partition wall 2 is limited, if the circulation pump 15 continues to operate, the liquid level of the second tank portion 1b rises, overcoming the partition wall 2 to the first tank portion 1a. The brine flows in.

[0003]

In the tank structure according to the above-mentioned conventional technique, in the second tank portion 1b, the brine returned from the heat exchanger and the brine circulated from the first tank portion 1a are mixed. Then, the mixed brine is supplied to the heat exchanger 13 to cool the refrigerating chamber. Since the temperature of the mixing line is considerably smaller than the temperature of the line directly supplied from the first tank portion 1a to the other heat exchanger 10, the temperatures of the two refrigerating chambers are kept close to each other. However, there was a problem that it was difficult to control and the temperature difference widened. The present invention has been made to solve such a problem, and provides a refrigerating apparatus having a simple operation and a simple structure, which can stably control two separate refrigerating chambers at different temperatures close to each other. It is intended to be provided.

[0004]

[Means for Solving the Problems]

 In order to achieve the above-mentioned object, the present invention provides two cooling heat exchangers respectively installed in two separate refrigerating compartments, and a heat medium brine which is fluidly connected to the heat exchangers. In a refrigerating device having a brine tank for holding and a freezing part for cooling the brine in the brine tank, the inside of the brine tank includes a first tank part corresponding to the two heat exchangers by a partition wall. A second tank part, a cooling pipe of the freezing part is immersed in the first tank part, and a high temperature region in the second tank part where brine from the heat exchanger returns and the first tank part Is partitioned by a partition plate into a low temperature region where brine is supplied from a circulating pump through the circulation pump, and the lower opening of the partition plate and the flow guide plate provided on the second tank section side of the partition wall cooperate with each other. The high A brine return flow path from a region to the upper part of the first tank portion through the cold temperature region is formed, and the brine is directly supplied from the low temperature region to the corresponding heat exchanger. It is a thing.

[0005]

[Action]

 In the above-mentioned configuration, the brine cooled by the freezing section in the first tank section of the brine tank is partially supplied to the corresponding heat exchanger to cool the refrigerating room, while the other section is the second tank section. It is sent to the low temperature region. The brine that has entered this low-temperature region is partly mixed with the brine that has returned to the high-temperature region, but most of it is sent to the corresponding heat exchanger as it is, cools the refrigerating chamber, and enters the high-temperature region of the second tank section. Return and flow into the first tank through the brine return flow path.

[0006]

【Example】

 Next, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings, in which the same reference numerals indicate the same or corresponding parts. 1 and 2, the refrigerating chambers 22 and 23 of the refrigerating apparatus 20 are separated by a partition wall 21. The front surfaces of the refrigerating chambers 22 and 23 are closed by openable / closable doors 25a and 25b, and the rear surfaces are closed by a fixed wall 25c.

The refrigerating compartment 22 is provided with the first heat exchanger 10 described above, and the refrigerating compartment 23 is provided with the second heat exchanger 13. The heat exchangers 10 and 13 are located on the ceiling portion as shown in the figure, and the inside air is sent to the heat exchangers by a cool air circulation fan 26 provided at the back of each refrigerating compartment. Heat is exchanged between the sent air in the refrigerator and the brine sent by the circulation pumps 9 and 12. The temperature of the air in the refrigerator is detected by the temperature sensors 28a and 28b. In the machine room 27 located above the refrigerating device 20, the freezing section 3 is provided as in the above-described conventional technique, and thereby the brine in the brine tank 30 (described later) is cooled. The brine tank 30 is placed on the top plate 25d of the refrigerator compartments 22 and 23. Circulation pumps 9 and 12 for sending brine from the brine tank 30 to the heat exchangers 10 and 13 are also provided in the machine room 27.

FIG. 3 shows the structure of the brine tank 30, the brine distribution system related to the structure, and the refrigerant distribution system of the refrigeration unit 3. Further, FIG. 4 is a perspective view showing the structure of the characteristic portion of the brine tank 30 three-dimensionally. In FIGS. 3 and 4, the interior of the brine tank 30 is divided by a partition wall 32 into a first tank portion 30a and a second tank portion 30b. Inside the first tank portion 30a, a square tube-shaped brain guide 40 is erected, and a serpentine cooler (cooling pipe) 4 for cooling the brine by evaporating the refrigerant in the freezing portion 3 is immersed. . The refrigeration unit 3 has a cooling medium compressor 3a, a condenser 3b, a cooler 4 and pipes as in the ordinary unit, but it should not be understood as a special unit. Brine suction pipes 41a and 41b are provided upright on the bottom of the first tank portion 30a, surrounded by the brine guide 40. The suction pipe 41a facilitates sending the brine to the heat exchanger 10, and the suction pipe 41a, the circulation pump 9 and the heat exchanger 10 are connected by the pipes 11a, 11b and 11c. The pipe 11c opens at the outlet 11d of the first tank portion 30a of the brine tank 30, and the brine sent to the heat exchanger 10 by the circulation pump 9 returns to the first tank portion 30a from the outlet 11d. There is.

The brine suction pipe 41b has a smaller diameter than the suction pipe 41a, but communicates with the outlet 16c of the second tank portion 30b via the circulation pump 15 and the pipes 16a and 16b. This is to send a part of the brine 5a in the first tank portion 30a cooled by the cooler 4 to the second tank portion 30b. Vertical partition plates 33, 34 are provided in the second tank portion 30b with the outlet 16c interposed therebetween. The three-dimensional relationship between the partition wall 32 and the partition plates 33 and 34 is shown in FIG. Referring to FIGS. 3 and 4, the partition plate 33 is fixed to the partition wall 32 in a U-shaped horizontal cross section. The lower end of the partition plate 33 is separated from the bottom surface of the second tank portion 30b to define an opening 33a, while the part of the partition wall 32 surrounded by the partition plate 33 is cut off at its upper end to define the slot 32a. Is made.

Further, referring to FIGS. 3 and 4, the partition plate 34 has an L-shaped plane cross section, and has an opening 34 a facing the opening 33 a of the partition plate 33 in the lower part. As clearly shown in FIG. 4, the suction pipe 41c, which is erected on the bottom surface of the second tank portion 30b surrounded by the partition wall 32 and the partition plate 34, includes the circulation pump 12, the heat exchanger 13, and the pipe 14a. , 14b, 14c to communicate with the outlet 14d that opens into the space surrounded by the partition plate 34. The suction pipes 41a, 41c are provided with brine thermistors 6a, 6b for detecting the temperature of the brine. The output signal of the brine thermistor 6a is used for controlling the operation of the compressor, and the output signal of the brine thermistor 6b is used for the circulation pump 15. Used for operation control. Reference numeral 7 is a drain valve for discharging the brine in the brine tank 30 as needed.

The operation of the refrigerating apparatus 20 having the above configuration will be described focusing on the movement of the brine in the brine tank 30. Referring to FIGS. 3, 5 and 6, when the circulation pump 9 is operated, the brine 5a of the first tank portion 30a is sucked from the suction pipe 41a and returns to the outlet 11d via the heat exchanger 10. The brine discharged from the outlet 11d is guided by the brine guide 40 as shown by the arrow and flows into the suction pipe 41a again, but is cooled by the cooler 4 (not shown in FIGS. 5 and 6) in the process. Be done.

When the circulation pump 15 operates, a part of the brine 5a flows out from the suction pipe 41b and flows into the second tank portion 30b through the outlet 16c of the second tank portion 30b. The brine 5b swirls and flows as shown by the arrow, and flows out from the suction pipe 41c. This is because it is sucked in by the circulation pump 12, and further passes through the heat exchanger 13 and returns to the outlet 14d. Since the returned brine is surrounded by the partition plate 34, it is guided by the partition plate 34 to descend, and flows out through the opening 34a. In particular, as shown in FIG. 6, the descended brine flows as shown by the arrow due to the flow inertia and the geometrical relationship between the opening 34a of the partition plate 34 and the opening 33a of the partition plate 33. Flows in between the partition wall 32 and the partition plate 33 and rises. The elevated line rides over the partition wall 32 through the slot 32a and flows into the first tank portion 30a. This brine joins and mixes with the brine 5a that goes around the brine guide 40. In this way, the brine cooled by the cooler 4 is sent to the heat exchangers 10 and 13 for heat exchange, and cools the inside of the refrigerating chambers 22 and 23.

Next, the flow state of the brine in the brine tank 30 will be described as a change in the water level. FIG. 7 shows a state in which the pumps 9, 12 and 15 are inoperative. The openings 33a, 34a and the slot 32a each function as a communication hole for brine, and the water level is the same in both the first tank portion 30a and the second tank portion 30b as shown in FIG. When the pumps 9 and 12 operate together and the circulation pump 15 does not operate, the amount of suction brine by the pumps 9 and 12 is equal to the amount returned, so as shown in FIG. The water level of the portion 30a is equal to the water level of the second tank portion 30b. When the circulation pump 15 is operated in addition to the pumps 9 and 12, brine is directly sent from the first tank portion 30a to the second tank portion 30b, so that as shown in FIG. The water level becomes high. At this time, the opening 34a in the lower part of the vertical partition plate 34, the partition plate 33, that is, the opening 33a of the flow guide plate, and the space between the partition wall 32 and the partition plate 33 form the return flow path of the brine, From the high temperature area surrounded by the plate 34 (the brine returning from the heat exchanger 13 is relatively high temperature), the brine flows back to the first tank portion 30a through the other relatively low temperature area. .

[0014]

[Effect of device]

 As described above, according to the present invention, the cooled brine sent from the first tank part to the second tank part is sent to the heat exchanger almost as it is, and the high temperature brine returned from the heat exchanger is , The vertical partition plate, the flow guide plate, the partition wall, and the return flow path defined by the openings, and flow into the first tank section without mixing with other brine in the second tank section. The temperature of the refrigerating compartment with the heat exchanger can be kept at a low value close to the temperature of the other refrigerating compartment.

[Brief description of drawings]

FIG. 1 is an overall view of a refrigerating apparatus according to an embodiment of the present invention.

2 is a side sectional view of the embodiment of FIG.

FIG. 3 is a flow system diagram of a brine including a main part of the embodiment of FIG.

FIG. 4 is a partial perspective view of a brine tank forming a main part of the embodiment of FIG.

5 is a plan view for explaining the operation of the embodiment of FIG.

FIG. 6 is a vertical cross-sectional view for explaining the operation of the embodiment of FIG.

FIG. 7 is an explanatory view of the operation of the embodiment shown in FIG.

FIG. 8 is an explanatory view of the operation of the embodiment shown in FIG.

FIG. 9 is a diagram for explaining the operation of the embodiment of FIG.

FIG. 10 is a schematic diagram showing an example of a conventional tank structure.

[Explanation of symbols]

3 ... Freezing part, 4 ... Cooler (cooling pipe), 10 ... Heat exchanger,
13 ... Heat exchanger, 15 ... Circulation pump, 20 ... Refrigerator,
22 ... Refrigerator, 23 ... Refrigerator, 30 ... Brine tank,
30a ... 1st tank part, 30b ... 2nd tank part, 32 ...
Partition wall, 33 ... Partition plate (flow guide plate), 34 ... Partition plate,
34a ... Lower opening.

Claims (1)

[Scope of utility model registration request] 1. A two heat exchangers for cooling which are respectively installed in two separate refrigerating chambers, a brine tank which fluidly communicates with the heat exchangers, and holds a brine for a heat medium, In a refrigerating device having a freezing part for cooling the brine in a brine tank, the inside of the brine tank is divided by a partition wall into a first tank part and a second tank part corresponding to the two heat exchangers. The
The cooling pipe of the freezing part is immersed in the first tank part, and a high temperature region where the brine from the heat exchanger returns in the second tank part, and the brine is supplied from the first tank part via a circulation pump. The low temperature region is divided by a partition plate, and the lower opening of the partition plate and the flow guide plate provided on the side of the second tank portion of the partition wall cooperate with each other so that the high temperature region to the cold temperature region. A refrigerating apparatus having two refrigerating chambers, characterized in that a brine return flow path leading to the upper portion of the first tank portion is formed therethrough.