KR19990056244A - Rapid freezing system of direct cooling refrigerator - Google Patents

Abstract

The present invention provides a rapid freezing system of a direct cooling refrigerator. Specifically, in a direct-cooling refrigerator having a refrigerant cycle in which a freezer compartment evaporator and a refrigerator compartment evaporator are connected in series with one compressor, the freezer compartment evaporator and the refrigerator compartment evaporator are configured such that the refrigerant passing through the freezer compartment evaporator is directly drawn into the compressor by bypassing the refrigerator compartment evaporator. A bypass pipe installed to be connected to the compressor starting therebetween; And a flow path switching switch for selectively connecting the outlet from which the refrigerant flows out of the freezer compartment evaporator, the inlet through which the refrigerant flows into the refrigerating chamber evaporator, and the inlet through which the refrigerant flows into the bypass pipe. It is controlled to connect the freezer compartment evaporator and the refrigerating compartment evaporator and to connect the freezer compartment evaporator and the bypass pipe during operation for rapid freezing.

Accordingly, in the direct-cooling refrigerator in which the freezing compartment evaporator and the refrigerating compartment evaporator are connected to one compressor, the freezing compartment can be rapidly frozen without the temperature of the refrigerating compartment being too low.

Description

Rapid freezing system of direct cooling refrigerator

The present invention relates to a rapid freezing system of a direct-cooling refrigerator, and more particularly, in a direct-cooling refrigerator having a cooling cycle in which an evaporator respectively installed in a freezer compartment and a refrigerating compartment is connected to one compressor, a direct-cooling refrigerator configured to enable rapid freezing of the freezer compartment only. It relates to a rapid freezing system.

In general, if the refrigerator is classified according to the cooling method, it is divided into direct cooling and liver cooling. Direct cooling refers to the direct cooling method, which installs each cooler (evaporator) in the freezer compartment and the refrigerating compartment and cools the freezer and the freezer compartment using natural convection. On the other hand, intercooling means an indirect cooling method, in which a cooler is installed only in a freezer compartment and a cold air generated through heat exchange is forcedly supplied to a freezer compartment and a refrigerating compartment using a cooling fan.

Figure 1 is a side cross-sectional view showing a simple configuration of a conventional direct-cooling refrigerator 10. In the refrigerator 10, the main body 12 is divided into an upper refrigerator compartment 13 and a lower freezer compartment 14, and a refrigerator compartment evaporator 15 and a freezer compartment evaporator 16 are respectively installed. The refrigerating compartment evaporator 15 is installed at the rear side of the refrigerating compartment 13, and the freezing compartment evaporator 16 is installed to substantially form a storage shelf of the freezing compartment 14. In addition, a condenser 17, which is a radiator, is installed at an outer rear side of the refrigerator 10, and a machine room in which a compressor 18 is installed is disposed at the rear of the lower part.

An example of such a cooling cycle of the conventional direct cooling refrigerator 10 is shown in FIG. 2. The illustrated cooling cycle has a configuration in which the freezer compartment evaporator 16 and the refrigerator compartment evaporator 15 are connected to one compressor 18 in series.

That is, the refrigerant is adiabaticly compressed by the compressor 18 and discharged through the discharge pipe 18a in a high pressure state. The high-pressure refrigerant is liquefied while dissipating while passing through the condenser 17 installed on the rear rear of the refrigerator 10. The liquefied refrigerant is reduced in pressure while passing through a valve and a pressure reducer to prevent backflow, and then lowers the temperature of the freezer compartment 14 while passing through the freezer compartment evaporator 16, and then passes through the refrigerating compartment evaporator 15. Lower the temperature of (13). The refrigerant then flows back into the compressor 18 through the suction pipe 18b to complete one cycle.

As described above, in the conventional direct cooling refrigerator in which the freezing compartment evaporator 16 and the refrigerating compartment evaporator 15 are connected to one compressor 18 in series, there is a problem that supercooling for the freezing compartment 14 is impossible.

That is, in order to rapidly freeze the freezer compartment 14, the compressor 18 must be continuously operated. The refrigerant discharged from the compressor 18 is supplied not only to the freezer compartment evaporator 16 but also to the freezer compartment evaporator 15. This is because only 14) is not rapidly frozen, and the temperature of the refrigerating compartment 13 is too low to freeze foods stored in the refrigerating compartment 13.

Accordingly, in the related art, a system in which separate compressors 18 are connected to each of the freezer compartment evaporators 16 and the refrigerating chamber evaporators 15 for the rapid freezing of the freezer compartment 14 has been proposed, but this is a compressor 18. Since there are two units, there is a problem that the manufacturing cost is increased and the volume of the machine room is relatively large.

Accordingly, the present invention has been made in order to solve the above-mentioned problems, the freezer compartment in the direct-cooling refrigerator connecting the freezer compartment evaporator and the refrigerator compartment evaporator to one compressor so that the freezer compartment can be rapidly frozen without the temperature of the refrigerator compartment being too low. An object of the present invention is to provide a rapid freezing system of a direct-cooling refrigerator configured to control a refrigerant supplied to an evaporator and a refrigerator compartment evaporator.

Figure 1 is a side cross-sectional view schematically showing the termination of the refrigerator compartment of a conventional direct-cooling refrigerator,

2 is a schematic view showing an example of a cooling cycle of a conventional direct-cooling refrigerator.

Figure 3 is a schematic diagram showing the configuration of a refrigerant cycle according to an embodiment of the present invention.

Figure 4 is a schematic diagram showing the configuration of a refrigerant cycle according to another embodiment of the present invention.

5 is a control circuit diagram for rapid freezing control according to an embodiment of the present invention.

〈Explanation of the Signs of Major Parts of Drawings〉

10: refrigerator 12: main body

13: refrigerator compartment 14: freezer compartment

15: refrigerator evaporator 16: freezer evaporator

17 condenser 18 compressor

18a: discharge pipe 18b: suction pipe

22: flow path switch 24: bypass pipe

30: flow path switch 32: bracket

34: rotating member 40: rapid freezing switch

42: power supply 44: first thermostat

46: second thermostat

In order to achieve the above object, the present invention provides a direct-cooling refrigerator having a refrigerant cycle in which a freezer compartment evaporator and a refrigerating compartment evaporator are connected in series to one compressor, wherein the refrigerant passing through the freezer compartment evaporator is directly sucked into the compressor by bypassing the refrigerator compartment evaporator. Preferably, the bypass pipe is installed between the freezer compartment evaporator and the refrigerating compartment evaporator to be connected to the compressor, and an outlet through which the refrigerant flows out of the freezer compartment evaporator, an inlet through which the refrigerant flows into the refrigerator compartment evaporator, and an inlet through which the refrigerant flows into the bypass pipe. By including a flow path switching switch for connecting, the flow path switching switch is controlled to connect the freezer compartment evaporator and the refrigerating chamber evaporator during operation of the general refrigerator, and to connect the freezer compartment evaporator and the bypass pipe during operation for rapid freezing. Rapidness of the fridge It provides a dynamic system.

Alternatively, the flow path switching switch includes: an inlet through which the refrigerant is supplied to the refrigerating chamber evaporator on one side and an outlet through which the refrigerant flows out of the refrigerating chamber evaporator, and an outlet and a compressor on which the refrigerant flows out of the freezer compartment evaporator on the opposite side thereof A bracket to which a suction pipe inlet through which refrigerant is introduced is connected; And rotatably installed in the bracket to connect the outlet of the freezer compartment evaporator, the inlet of the refrigerator compartment evaporator, the outlet of the refrigerator compartment evaporator, and the suction pipe inlet, and the outlet of the freezer compartment evaporator and the suction pipe inlet. And a rotational member for selectively reciprocating between the position of closing the inlet and the outlet.

In addition, the flow path switching switch is controlled to perform a switching operation for rapid freezing when the temperature in the refrigerating chamber is below a predetermined reference value, and when the temperature is above the reference value is controlled to perform a switching operation for normal operation, the freezer compartment evaporator and the refrigerator compartment evaporator are one compressor. In the direct-cooling refrigerator connected to the refrigerator, the temperature of the refrigerator compartment is not too low, so that the freezer compartment can be rapidly frozen.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

Figure 3 is a schematic diagram showing the configuration of the refrigerant cycle according to an embodiment of the present invention, Figure 4 is a schematic diagram showing the configuration of the refrigerant cycle according to another embodiment of the present invention, and Figure 5 is an embodiment of the present invention Is a control circuit diagram for rapid freezing control according to the present invention.

The rapid freezing system of the direct-cooling refrigerator according to an embodiment of the present invention is applied to a direct-cooling refrigerator (10) having a refrigerant cycle in which a freezer compartment evaporator (16) and a refrigerator compartment evaporator (15) are connected in series with one compressor (18). It is a system. The rapid freezing system may include a bypass pipe 24 and a flow path switching switch 22, as shown in FIG.

The bypass pipe 24 starts between the freezer compartment evaporator 16 and the refrigerator compartment evaporator 15 so that the refrigerant passing through the freezer compartment evaporator 16 is directly drawn into the compressor 18 by bypassing the refrigerator compartment evaporator 15. 18 is a passage through which a coolant connected to the pump flows. The refrigerant passing through the bypass pipe 24 may flow into the compressor 18 through the suction pipe 18b. Alternatively, it may be directly connected to the compressor 18.

In addition, the flow path switching switch 22 is a switching means for switching a passage through which a refrigerant flowing selectively connecting the freezer compartment evaporator 16 to the refrigerating compartment evaporator 15 or the bypass pipe 24 flows. That is, the flow path switching switch 22 may connect the outlet 16a through which the refrigerant flows out of the freezer compartment evaporator 16 and the inlet 15a through which the refrigerant flows into the refrigerating compartment evaporator 15, and also in the freezer compartment evaporator 16. The outlet 16a through which the refrigerant flows out may be connected to the inlet 24a through which the refrigerant flows into the bypass pipe 24. The former is a case of forming a general refrigerant cycle, the latter may be a connection configuration in the case of rapid freezing.

That is, the operation of the flow path switching switch 22 connects the freezer compartment evaporator 16 and the refrigerating compartment evaporator 15 when the general refrigerator 10 is operated, and the freezer compartment evaporator 16 and the bypass pipe during the rapid freezing operation. 24 can be controlled to connect.

Thus, in normal operation, the refrigerant compressed by the compressor 18 passes through the freezer compartment evaporator 16 and the refrigerating compartment evaporator 15 in order through the condenser 17 or the like, and the desired temperature of the freezer compartment 14 and the refrigerating compartment 13 is achieved. It can flow to be. On the other hand, during rapid freezing, the refrigerant compressed and discharged from the compressor 18 passes through the freezer compartment evaporator 16 after passing through the condenser 17, and may immediately enter the compressor 18 through the bypass pipe 24. have. Therefore, excessive temperature fall of the refrigerating chamber 13 can be prevented.

In addition, according to another preferred embodiment of the present invention, a specific flow path switching switch 30 as shown in Figure 4 may be provided. In general, the direct-cooling refrigerator 10 has a compressor 18 positioned at the bottom, as shown in FIG. 1, a condenser 17 on one side and a freezer evaporator 15 on the other side. It is located on the upper side, the relative position of the cooling cycle in this case is configured as shown in FIG. In FIG. 4, the condenser 17 and the evaporators 15 and 16 are centered for convenience of description, and other devices are omitted.

According to the configuration of the cooling cycle, the refrigerant is supplied from the central compressor 18 to the condenser 17 on the right side, and then to the freezer compartment evaporator 16 located on the lower left side and the refrigerating chamber evaporator 15 thereon. . Then, a pipe is connected from the upper end side of the refrigerating chamber evaporator 15 to the lower side so that the refrigerant can be reflowed into the compressor 18 on the lower side. In this case, the connection portion between the freezer compartment evaporator 16 and the refrigerator compartment evaporator 15 and the connection portion between the refrigerator compartment evaporator 15 and the compressor 18 are located in close proximity to each other spatially.

Therefore, the apparatus for switching the flow path of the refrigerant does not need a separate bypass pipe 24, as shown in Figure 4, it can be configured by installing only the flow path switching switch 30. The flow path switching switch 30 may include a bracket 32 having four entrances and exits of the refrigerant and a rotation member 34 installed therein.

The bracket 32 has an inlet 15a through which coolant is supplied to the refrigerating chamber evaporator 15 on one side thereof, and an outlet 15b through which the refrigerant flows out of the refrigerating chamber evaporator 15, and is connected to the freezer compartment evaporator on a side opposite thereto. The outlet 16a through which the refrigerant flows out at 16 and the suction pipe inlet 18c through which the refrigerant flows into the compressor 18 may be connected. And the rotation member 34 is rotatably installed in the bracket 32, preferably can be installed reciprocating about 90 °. The rotating member 34 has an outlet 16a of the freezer compartment evaporator 16, an inlet 15a of the refrigerating compartment evaporator 15, an outlet 15b of the refrigerating compartment evaporator 15, and a suction pipe inlet (in the bracket 32). 18c) and a position connecting the outlet 16a of the freezer compartment evaporator and the suction pipe inlet 18c to each other while closing the inlet 15a and outlet 15b of the refrigerating compartment evaporator 15 selectively. It can be installed reciprocally. At this time, the respective connecting passages are well sealed to each other so that the refrigerant does not leak out.

The control operation of each of the flow path switching switches 22 and 30 having such a configuration can be adjusted by the control circuit as shown in FIG. 5. 5 shows a control circuit in which the operation of the compressor 18 is regulated by the first thermostat 44 and the second thermostat 46.

That is, in the general operation, the compressor 18 is connected to the power source 42 through the first thermostat 44. The first thermostat 44 typically starts the operation of the compressor 18 when the temperature is higher than the predetermined temperature by sensing the temperature in the refrigerating chamber 13, so that the temperatures of the freezing chamber 14 and the refrigerating chamber 13 are lower than or equal to that. Adjust to maintain.

When the user wants rapid freezing of the freezer compartment 14, the user presses the quick freezing switch 40. Then, the compressor 18 is connected to the second thermostat 46 capable of sensing the temperature of the refrigerating chamber 13. The second thermostat 46 is connected not only to the compressor 18 but also to the flow path switching switches 22 and 30. Thus, when the temperature in the refrigerating chamber 13 is a predetermined reference value, for example, 5 ° C. or less, the switching operation for rapid freezing is performed so that the refrigerant is supplied only to the freezer compartment evaporator 16 in the case of the cycle shown in FIGS. 3 and 4, and the refrigerating compartment evaporator 15. Do not allow refrigerant to be supplied. Thus, only the freezer compartment 14 can be cooled while the refrigerating compartment 13 maintains temperature.

On the other hand, when the temperature of the refrigerating chamber 13 becomes higher than a reference value, for example, 5 ° C. due to frequent opening and closing of the door of the refrigerator 10, the flow path switching switches 22 and 30 are configured to perform a switching operation for general operation. 2 receives a signal from the thermostat (46). In this case, the coolant may also be supplied to the refrigerating chamber evaporator 15 to cool the refrigerating chamber 13. At this time, the second thermostat 46 senses the temperature controlling the operation of the compressor 18 and cuts off the power supply, and senses the temperature at which the operation of the flow path switching switches 22 and 30 is controlled. It is desirable to have an output terminal for outputting

Accordingly, when the rapid freezing function is activated, the refrigerant is intensively supplied only to the freezing compartment 14 at first, and when the temperature of the refrigerating compartment 13 becomes too high, the refrigerant is returned to the general refrigerant cycle, thereby realizing the rapid freezing function only for the freezing compartment 14. Can be.

According to the configuration and function of the rapid freezing system of the direct-cooling refrigerator according to the embodiment of the present invention described above, the refrigerant is supplied only to the freezer compartment evaporator during the rapid freezing, thereby connecting the freezer compartment evaporator and the refrigerator compartment evaporator to one compressor. In the direct-cooling refrigerator, the temperature of the refrigerating compartment is not too low, so the freezing compartment can be rapidly frozen.

One embodiment of the present invention has been described in detail above with reference to the accompanying drawings, but the present invention is not limited thereto, and the present invention is not limited to the scope of the present invention provided in the following claims. It will be readily apparent to one of ordinary skill in the art that various modifications and variations can be made.

Claims (3)

In the direct-cooling refrigerator 10 having a refrigerant cycle connecting the freezer compartment evaporator 16 and the refrigerating compartment evaporator 15 to one compressor 18 in series, Installed between the freezer compartment evaporator 16 and the refrigerator compartment evaporator 15 and connected to the compressor 18 such that the refrigerant passing through the freezer compartment evaporator 16 is directly drawn into the compressor 18 by skipping the refrigerator compartment evaporator 15. The bypass pipe 24; And Selectively connecting the outlet 16a through which the refrigerant flows from the freezer compartment evaporator 16, the inlet 15a through which the refrigerant flows into the refrigerating chamber evaporator 15, and the inlet 24a through which the refrigerant flows into the bypass pipe 24. By including the flow path switching switch 22, The flow path switching switch 22 connects the freezer compartment evaporator 16 and the refrigerating compartment evaporator 15 during operation of the general refrigerator 10, and the freezer compartment evaporator 16 and the bypass pipe 24 during operation for rapid freezing. Rapid freezing system of the direct-cooling refrigerator characterized in that the control to connect. The method of claim 1, wherein there is no separate bypass pipe 24 and the flow path switching switch 30: refrigerant flows from the inlet 15a and the refrigerating chamber evaporator 15 to which the refrigerant is supplied to the refrigerating chamber evaporator 15 on one side. Is connected to the outlet 15b, and a bracket to which the outlet 16a through which the refrigerant flows out from the freezer compartment evaporator 16 and the suction pipe inlet 18c through which the refrigerant flows into the compressor 18 are connected. 32); And rotatably installed in the bracket 32, the outlet 16a of the freezer compartment evaporator 16, the inlet 15a of the refrigerator compartment evaporator 15, the outlet 15b of the refrigerator compartment evaporator 15, and the suction pipe inlet ( 18c) and a position connecting the outlet 16a of the freezer compartment evaporator and the suction pipe inlet 18c to each other while closing the inlet 15a and outlet 15b of the refrigerating compartment evaporator 15 selectively. Rapid refrigeration system of a direct-cooling refrigerator characterized by including a reciprocating rotating member (34). According to claim 1 or 2, wherein the flow path switching switch (22, 30) is a switching operation for rapid freezing when the temperature in the refrigerating chamber (13) is less than a predetermined reference value, when the reference value is higher than the switching for normal operation Rapid freezing system of the direct-cooling refrigerator, characterized in that controlled to operate.