KR101461394B1 - Refrigeration-Air Conditioning System of Truck Refrigerator with Pressure Regulating Function - Google Patents

Abstract

The present invention relates to a refrigerator-freezer system of a refrigerator truck having a pressure control function which prevents a freezer unit performance from being degraded when simultaneously operating a freezer unit and a refrigerator unit by controlling pressure of refrigerant gas in the freezer unit and the refrigerator unit by one compressor in order to prevent spoilage of frozen food inside the truck. The refrigerator-freezer system of a refrigerator truck having a pressure control function includes a compressor (20) driven by a vehicle engine unit; a condenser (30) condensing the refrigerant discharged from the compressor; a freezer unit evaporator (50) supplying cold air to the freezer unit when the refrigerant passed through the condenser (30) passes; a refrigerator unit evaporator (90) refrigerating an inner portion of the refrigerator truck; a first suction piping (24) connected to enable the refrigerant passed through the freezer unit evaporator (50) to be sucked in by the compressor (20); and a second suction piping (94) connected to the compressor (20) independently from the first suction piping (24) while being connected between the refrigerator unit evaporator (90) and the compressor (20) to enable the refrigerant discharged from an outlet side of the refrigerator unit evaporator (90) to be sucked in by the compressor (20).

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a refrigeration-

The present invention relates to a refrigeration-cooling system for a refrigerator having a pressure control function, and more particularly, to a refrigeration system for controlling the performance of a refrigeration unit by simultaneously controlling a refrigerant pressure of a freezer and a refrigerator through a single compressor, So that damage to the frozen food in the inside of the vehicle can be prevented.

In general, foodstuffs whose freshness can be altered according to temperature are transported using a refrigerator.

Such a refrigerator can be used for carrying refrigeration and cooling functions for carrying refrigerated foods or low-temperature foods that can not be stored or transported at room temperature, such as various refrigerated foods or low-temperature foods. Cooling device is installed on the driver's seat side or the upper side of the conveyance port of the vehicle to cool the driver's seat side of the vehicle through the respective evaporators of the refrigerating and cooling device and the internal temperature of the carrier to a low temperature state .

As shown in Fig. 1, the refrigeration-cooling system of a conventional refrigerator is provided with a compressor 20 driven by an engine 10 of a vehicle and a compressor 20 for condensing the refrigerant discharged from the compressor 20 A condenser 30, a heat exchanger 40 through which the refrigerant passed through the condenser 30 passes, and a freezer evaporator 50 through which the refrigerant passing through the heat exchanger 40 passes.

The refrigerant having passed through the refrigerant evaporator (50) is again sucked into the compressor (20) through the heat exchanger (40).

The heat exchanger 40 exchanges heat between the hot liquid refrigerant at the rear end of the condenser 30 and the cold refrigerant at the rear end of the freezer evaporator 50 to increase the supercooling degree and superheat degree to increase the refrigerating efficiency, Prevent condensation or freezing of piping.

A receiver 60 is provided between the condenser 30 and the heat exchanger 40 to store refrigerant flowing therethrough and keep the flow of the refrigerant constant even when the amount of refrigerant changes. The dryer 70 is further provided.

Further, an expansion valve 80 is provided between the heat exchanger 40 and the freezer evaporator 50 to send the refrigerant under reduced pressure to the freezer evaporator 50.

In addition, the refrigerating compartment evaporator 90 is provided on one side of the refrigerating compartment so as to perform an air-conditioning function.

The refrigerant discharged from the compressor (20) is supplied to the condenser (30), and the refrigerant from the condenser (30) through the dryer (70) is sent to the heat exchanger And the refrigerant passing through the heat exchanger 40 is connected to a transfer pipe 42 through which the refrigerant passing through the heat exchanger 40 is sent to the freezer evaporator 50. The refrigerant passing through the freezer evaporator 50 is heat- A transfer pipe 52 for sending the refrigerant to the compressor 40 and a first suction pipe 24 for allowing the refrigerant passing through the heat exchanger 40 to be sucked back to the compressor 20 are connected.

The freezing solenoid valve 44 is provided on the transfer pipe 42 in the course of the refrigerant flowing through the heat exchanger 40 into the freezer evaporator 50.

A refrigerant liquid refrigerant transfer pipe 92 branched from the transfer pipe 72 connecting the dryer 70 and the heat exchanger 40 and connected to the refrigerant evaporator 90 to allow the refrigerant to pass therethrough is connected The refrigerant passing through the cooling evaporator 90 is transferred through the second suction pipe 94 connected to the first suction pipe 24 through the connection pipe 98 and is then cooled through the condensate suction pipe 24a And is combined with the refrigerant that has passed through the secondary evaporator (50) and sucked into the compressor (20).

A cooling unit electromagnetic valve 96 is provided on the refrigerant liquid refrigerant transfer pipe 92 and a capillary tube 90a is provided in the portion to be introduced into the cooling air evaporator 90. [

A defrosting pipe 100 is connected between the discharge pipe 22 and the transfer pipe 42 and a defrosting valve 110 is provided in the defrosting pipe 100.

This conventional refrigerator-freeze-refrigerating system is a system for operating both the refrigerating unit 1 and the cooling unit 2 with one compressor 20. The compressor 20 is driven by driving the engine unit 10 of the refrigerating vehicle Is operated to circulate the refrigerant.

A refrigerant solenoid valve 44 is provided on the transfer pipe 42 connected to the refrigerant evaporator 90 from the heat exchanger 40 by operating the clutch of the compressor 20 when the freezing unit 1 is switched on So that the freezing portion 1 of the top vehicle operates while the refrigerant circulates by the operation of the freezing portion solenoid valve 44. [

When the switch of the cooling unit 2 is turned on, the cooling part electromagnetic valve 96 provided on the cooling liquid refrigerant transfer pipe 92 is operated to circulate the refrigerant toward the cooling part evaporator 90, Cooling is performed.

At this time, when the switch for the freezing section 1 of the refrigerator compartment and the switch of the cooling section 2 are operated at the same time, the freezing section electromagnetic valve 44 and the cooling section electromagnetic valve 96 operate simultaneously, The refrigerant is circulated in both the secondary evaporator 50 and the refrigerant evaporator 90, and the temperatures of the two portions are all lowered by the forced convection by the fan installed in each of them.

The temperatures of the freezing portion 1 and the cooling portion 2 are set to be different from each other. The temperature of the freezing portion 1 is lower than the temperature of the cooling portion 2 for storing frozen food or the like. Keep it lower.

The refrigerant pressure of the refrigerating section 1 and the refrigerating section 2 is generally such that the pressure of the refrigerating section 2 is high and the pressure of the freezing section is low when the pressure of the refrigerating section is high, Relatively low pressure is formed.

However, when the freezing section 1 and the cooling section 2 are simultaneously operated in the conventional refrigeration-freeze-throttle refrigeration-cooling system, the refrigerant pressure of the refrigerating section evaporator 90, which is relatively low compared to the refrigerant pressure of the cooling section evaporator 90, The refrigerant pressure of the refrigerant evaporator 90 is lowered and the refrigerant pressure of the refrigerant evaporator 50 is increased.

Therefore, in the case of the cooling unit 2, as the refrigerant pressure is lowered, the evaporation temperature is lowered, so that the cooling unit evaporator 90 is freeze or the flow amount of the refrigerant is reduced, thereby deteriorating the performance of the cooling unit. 1), the pressure is increased and the evaporation temperature rises and the desired temperature (especially the freezing temperature) can not be reached.

In other words, the conventional refrigeration-freezing-refrigeration-cooling system has a problem in that frozen food may be damaged if the air conditioner, which is a cooling unit, is simultaneously operated in the refrigeration vehicle storing and transporting the frozen food.

When the refrigerant combined by the connection pipe 98 is sucked into the compressor 20 through the combined suction pipe 24a, the combined suction pipe 24a is typically composed of a high-pressure hose made of a rubber material.

The specifications of the high-pressure hose are limited to a specific standard. The confluence suction piping 24a, in which the refrigerant of the first suction pipe 24 and the second suction pipe 94 are combined and sucked into the compressor 20, However, due to the limitation of the high-pressure hose standard, it is necessary to have the same size as that of the first and second suction pipes 24 and 94.

In such a case, there is a problem that the total suction flow rate of the refrigerant is reduced, and the suction flow rate of the freezing portion and the cooling portion is also decreased, which may lead to performance deterioration.

The size of the suction pipe and the size of the connecting pipe 98 are different from each other in the conventional case where the first and second suction pipes 24 and 94, the connecting pipe 98 and the merging suction pipe 24a are positioned below the body of the refrigerating machine. It is necessary to pay attention to the mounting of the freezing unit and to secure a sufficient space, which is a factor of increasing the cost.

2 shows another example of a conventional refrigeration-cooling system. In FIG. 2, a separate cycle is formed through two compressors 20 and 26 to circulate the refrigerant to the refrigerating unit 1 and the cooling unit 2, respectively The cooling unit 2 is provided with a cooling unit condenser 91 in addition to the cooling unit evaporator 90.

The refrigerant discharged from the first compressor 20 passes through the refrigerant condenser 91 through the discharge pipe 22 and then flows through the connection pipe 93 to the second suction pipe 94 via the refrigerant evaporator 90. [ The refrigerant is sucked into the compressor 20 again.

The refrigerant discharged through the second compressor 26 passes through the discharge pipe 27 through the condenser 30 to the refrigerant evaporator 50 side of the refrigerating unit 2 and then flows into the heat exchanger 40. [ Through the first suction pipe (24) to the second compressor (26).

The refrigeration-cooling system driven by the two compressors 20 and 26 does not affect the refrigerant pressure of the refrigerating unit 1 and the cooling unit 2, Since the two compressors 20 and 26 are driven through the engine 10, an excessive load is applied to the engine unit 10, which may adversely affect the fuel consumption and the durability of the vehicle engine.

When the two compressors 20 and 26 are installed, the space between the engine compartment is narrow and the distance between the lowest surface of the refrigerator compartment and the ground, i.e., the height of the ground surface is lowered, There is a problem that can be broken.

Korea Patent Registration No. 10-1180899 (Notice: 2012.09.07)

SUMMARY OF THE INVENTION Accordingly, the present invention has been made to solve the above-mentioned problems occurring in the prior art. Accordingly, it is an object of the present invention to provide a refrigeration system and a refrigeration system, In the cooling system, a refrigeration-cooling system of a refrigerator can be provided, which has a function of controlling the pressure of a refrigerant in a cooling unit, which is sucked into the compressor, to prevent damage to the frozen food.

According to an aspect of the present invention, there is provided a vehicle comprising: a compressor driven by an engine of a vehicle; A condenser for condensing the refrigerant discharged from the compressor; A freezer evaporator for supplying cool air to the freezer while passing through the condenser; A cooling unit evaporator for cooling the inside of the refrigerating compartment; A first suction pipe connected to the refrigerant passing through the freezer evaporator so as to be sucked into the compressor; And a second suction pipe connected between the refrigerant evaporator and the compressor such that the refrigerant exiting the outlet of the refrigerant evaporator is drawn into the compressor while being connected to the compressor independently of the first suction pipe.

The pressure of the refrigerant passing through the refrigerant evaporator may be adjusted on the second suction pipe to reduce the pressure difference of the refrigerant sucked into the compressor through the first suction pipe after passing through the refrigerant evaporator, And a pressure control pipe for preventing the pressure of the refrigerant in the refrigerant pipe from rising.

Also, the pressure control pipe includes a fastening portion formed at both ends and connected to the second suction pipe, and an axial pipe portion between the fastening portion and the axial pipe portion reduced to be smaller than the inner diameter of the fastening portion.

In addition, the compressor further includes a manifold for connecting the discharge pipe for allowing the refrigerant discharged from the compressor to flow and the first and second suction pipes.

The manifold may include a discharge port connected to the discharge pipe, and first and second suction ports connected to the first and second suction pipes.

In addition, the manifold folder includes a communication hole formed in the manifold folder so that the refrigerant sucked through the first and second suction pipes communicates with the first and second suction ports.

On the other hand, the present invention provides, as another solution, a compressor driven by an engine part of a vehicle; A condenser for condensing the refrigerant discharged from the compressor; A freezer evaporator for supplying cool air to the freezer while passing through the condenser; A cooling unit evaporator for cooling the inside of the refrigerating compartment; A first suction pipe for allowing the refrigerant having passed through the refrigerant evaporator to be sucked back to the compressor; A second suction pipe connected to the first suction pipe to allow the refrigerant to be joined and sucked into the compressor while the refrigerant flowing through the outlet side of the refrigerant evaporator flows; A condensing suction pipe connected to the first and second suction pipes so that the refrigerant flowing through the refrigerant evaporator and the refrigerant flowing through the refrigerant evaporator are combined and sucked into the compressor; The pressure of the refrigerant passing through the evaporator of the refrigerating unit is controlled by controlling the pressure of the refrigerant passing through the evaporator of the refrigerating unit and the pressure of the refrigerant sucked into the compressor through the first suction pipe after passing through the freezing unit evaporator, And a pressure control pipe for preventing the refrigerant pressure from rising.

According to another aspect of the present invention, the pressure regulating pipe includes a connecting portion formed at both ends thereof and connected to the pipe, and an axial pipe portion between the connecting portion and reduced to be smaller than the inner diameter of the connecting portion.

According to another aspect of the present invention, there is provided a structure for forming a connection pipe at a location where the first and second suction pipes meet so that respective refrigerants flowing through the first and second suction pipes are merged and moved to a combined suction pipe, to be.

As described above, according to the present invention, in the refrigerating machine of the present invention, when the cooling unit and the freezing unit are simultaneously operated by using one compressor, each of the suction pipes for flowing the refrigerant moving in the freezing unit and the cooling unit The refrigerating unit can maintain a higher pressure than the freezing unit and the freezing unit can maintain a lower pressure than the cooling unit. It is possible to prevent the performance degradation and automatically adjust the pressure.

In addition, a manifold folder is provided in the compressor, two suction pipes are connected to the manifold, and the refrigerant is sucked into the manifold through the manifold, thereby minimizing the influence on the refrigerant pressure between the freezing portion and the cooling portion There is an effect that the performance deterioration does not occur.

Further, the refrigerant pressure of the refrigerant evaporator at a relatively high pressure is maintained at a predetermined pressure or lower through a pressure control pipe provided on a suction pipe for allowing the refrigerant passing through the refrigerant evaporator to flow, It is possible to reduce the pressure difference between the refrigerant pressure and the refrigerant pressure of the evaporator, thereby preventing the deterioration of performance and preventing the temperature of the freezing section from rising, thereby preventing damage to the frozen food.

Further, the present invention can maintain the pressure of the refrigerant evaporator at a pressure higher than the pressure of the refrigerant evaporator through a pressure control tube provided on a suction pipe connected to the refrigerant passing through the refrigerant evaporator, It is possible to prevent performance deterioration due to freezing of the evaporator of the cooling unit.

In addition, according to the present invention, independent refrigerant suction pipes are connected to one compressor through manifolds to be sucked, thereby reducing the space occupied in the lower portion of the vehicle, and also facilitating mounting.

1 is a configuration diagram of a refrigeration-cooling system of a conventional refrigerator.
2 is a configuration diagram of another refrigeration-cooling system of a conventional refrigerator.
3 is a configuration diagram of a refrigeration-cooling system of a refrigerating machine according to a first embodiment of the present invention.
4 is an enlarged cross-sectional view of the pressure control pipe of Fig.
FIG. 5 is a perspective view illustrating a combined manifold of a compressor in a refrigeration-cooling system of a refrigerator according to a first embodiment of the present invention. FIG.
6 is a sectional view of the manifold according to the first embodiment of the present invention.
FIG. 7 is a configuration diagram of a refrigeration-cooling system of a refrigerator according to a second embodiment of the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

[First Embodiment] (See Figs. 3 to 6)

3 is a configuration diagram of a refrigeration-cooling system of a refrigerating machine according to a first embodiment of the present invention.

In the present invention, the same components as those described in FIG. 1 are denoted by the same reference numerals, and a detailed description thereof will be omitted, and new components will be described in detail with new reference numerals.

3, a compressor 20 driven by an engine 10 of a vehicle and a condenser 30 for condensing the refrigerant discharged from the compressor 20, as in the conventional refrigeration-cooling system, A heat exchanger 40 through which the refrigerant passes through the condenser 30 and a freezer evaporator 50 through which the refrigerant passing through the heat exchanger 40 passes.

The refrigerant having passed through the refrigerant evaporator (50) is again sucked into the compressor (20) through the heat exchanger (40).

The condenser 30 discharges the heat of the high-temperature and high-pressure gas refrigerant discharged from the compressor 20 into the air at room temperature to condense and liquefy it. In other words, the gas refrigerant condensed in the condenser 30 is deprived of the latent heat of condensation around the air.

The liquid receiver 60 is further provided between the condenser 30 and the heat exchanger 40 to temporarily store the condensed liquid refrigerant in the condenser 30 before sending the liquid refrigerant to the expansion valve. The receiver (60) is generally formed of a cylindrical high-pressure vessel and serves to receive the refrigerant in the apparatus so that it does not affect the system even when the ambient temperature or environment changes.

The dryer 70 is further provided at the next position of the refrigerant flow receiver 60 to remove moisture and foreign substances from the liquid refrigerant through the receiver 60.

An expansion valve 80 is provided between the heat exchanger 40 and the freezer evaporator 50 for throttling the liquid refrigerant and sending it to the freezer evaporator 50 in a low temperature and low pressure state.

In addition, the refrigerating compartment evaporator 90 is provided on one side of the refrigerating compartment so as to perform an air-conditioning function.

The compressor 20 is provided with a discharge pipe 22 through which the refrigerant discharged from the compressor 20 is sent to the condenser 30 and the refrigerant from the condenser 30 through the dryer 70 flows into the heat exchanger 30. [ A transfer pipe 72 to be connected to the evaporator 50 is connected to the evaporator 50 and a transfer pipe 42 for transferring the refrigerant through the heat exchanger 40 to the evaporator 50 is connected to the evaporator 50, And a first suction pipe 24 for allowing the refrigerant passing through the heat exchanger 40 to be sucked back to the compressor 20 are connected to each other, I have.

The freezing solenoid valve 44 is provided on the transfer pipe 42 in the course of the refrigerant flowing through the heat exchanger 40 into the freezer evaporator 50.

A refrigerant liquid refrigerant transfer pipe 92 is connected which is connected to the refrigerant evaporator 90 and is branched from a transfer pipe 72 connecting the dryer 70 and the heat exchanger 40 to allow the refrigerant to pass therethrough .

A cooling unit electromagnetic valve 96 is provided on the refrigerant liquid refrigerant transfer pipe 92 and a capillary tube 90a is provided in a portion of the refrigerant liquid refrigerant transfer pipe 92 that flows into the cooling air evaporator 90.

A defrosting pipe 100 is connected between the discharge pipe 22 and the transfer pipe 42 and a defrosting valve 110 is provided in the defrosting pipe 100.

In the first embodiment of the present invention, the second suction pipe 94 through which the refrigerant exiting through the outlet side of the cooling-air evaporator 90 flows is connected to the compressor 20 so that the refrigerant is sucked into the compressor 20 And the second suction pipe 94 has a structure in which a pressure control pipe 200 is provided.

4, the pressure regulating tube 200 includes a fastening part 210 formed at both ends thereof and a shaft part 210 which is contracted so as to be smaller than the inner diameter of the fastening part 210 between the fastening part 210, (220).

The coupling part 210 is connected to the second suction pipe 94 so that the refrigerant coming from the cooling part evaporator 90 passes through the pressure control pipe 200 and is sucked into the compressor 20 in a state where the pressure is lowered .

5 and 6, a manifold 28 for a three-way valve is provided on the compressor 20 side so that the discharge pipe 22, the first suction pipe 24, the second suction pipe 94, Respectively.

The manifold 28 has a discharge port 28a connected to the discharge pipe 22, a first suction port 28b connected to the first suction pipe 24 and a second suction port 28b connected to the second suction pipe 94, 2 inlet port 28c.

The second suction port 28c is inclined at a predetermined angle in view of the structure of the first suction port 28b and the second suction port 28c. In the inside of the manifold 28, And a communication hole 28d for allowing the refrigerant, which has passed through the first and second suction ports 28b and 28c and joined together, to be finally sucked into the compressor 20, ) Are formed on the substrate.

6, a discharge hole 22a for discharging the high-temperature and high-pressure refrigerant gas to the discharge pipe 22 is formed in the manifold folder 28, and a discharge hole 22a for discharging the high- 28e are formed.

Accordingly, the high-pressure refrigerant passing through the refrigerant evaporator 90 is lowered to a predetermined pressure or lower while passing through the pressure control pipe 200, and the low-pressure refrigerant passing through the refrigerant evaporator 50 flows through the first suction pipe 24 and the manifold 28 of the compressor 20 so as to be sucked at the same pressure so as to minimize the influence between the cooling unit 2 side and the freezing unit 1 have.

In other words, the refrigerant passing through the first suction pipe 24 flows into the inside of the manifold 28 through the first suction port 28b of the manifold 28, passes through the second suction pipe 94 The refrigerant is introduced into the manifold 28 through the second suction port 28c of the manifold 28. At this time, the refrigerant is mixed in the manifold 28, And the refrigerant is sucked into the compressor 20 through the communication hole 28d so that the influence of the refrigerant is greatly reduced. As a result, the refrigerant pressure in the freezer evaporator 50 rises, Can be prevented.

In the first embodiment of the present invention, the pressure regulating tube 200 can maintain the pressure of the refrigerant evaporator 90 at a pressure higher than the pressure of the freezer evaporator 50, It is possible to prevent performance deterioration due to freezing of the cooling-air evaporator 90, which may be caused by lowering the refrigerant pressure of the evaporator 90 and lowering the evaporation temperature.

Meanwhile, in the first embodiment of the present invention, the pressure control pipe 200 provided on the second suction pipe 94 may not be provided.

The refrigerating unit 1 and the first and second suction pipes 24 and 94 for the cooling unit 2 are connected through the manifold 28 of the compressor 20, It is possible to minimize the pressure interference between the cooling unit and the freezing unit cycle at the time of simultaneous operation of the freezing unit 1 and the cooling unit 2 (minimizing the confluence period that may interfere with each other and affect the pressure) ).

Therefore, the cooling unit 2 can maintain a higher pressure than the freezing unit 1, and the freezing unit 1 can maintain a lower pressure than the cooling unit 2, thereby automatically controlling the pressure .

According to the first embodiment of the present invention, the high pressure hose of a limited standard is not used, and the refrigerant is connected to the compressor 20 through the suction pipe which can be provided freely regardless of the inner diameter, (1) and the cooling unit (2) is sucked, the flow rate of the refrigerant sucked into the compressor is not limited, and performance deterioration can be prevented.

[Second Embodiment]

7, the second embodiment differs from the first embodiment in that the evaporator 90 of the cooling unit is provided in the compressor 20 described in the first embodiment without using the manifold 28 for the three- When the rough refrigerant is sucked into the compressor 20, the second suction pipe 94 is connected to the first suction pipe 24 through the connection pipe 98 so that the respective refrigerants are merged, And a condensing suction pipe (24a) connected to the compressor (20) to suck the combined refrigerant into the compressor (20).

Also, as in the first embodiment, a pressure control pipe 200 is provided on the second suction pipe 94, and a low-pressure refrigerant passing through the first suction pipe 24 in a state where the pressure of the high- And sucked into the compressor 20 through the merged suction pipe 24a.

That is, the compressor (20) has a structure in which only the discharge pipe (22) and the combined suction pipe (24a) are connected.

The second suction pipe 94 is connected to the first suction pipe 24 through the connection pipe 98 so that the refrigerant flowing inside the second suction pipe 94 flows from the position of the connection pipe 98 to the first suction pipe 94, Pressure refrigerant passing through the piping 24 and sucked into the compressor 20 through the combined suction piping 24a, the pressure of the refrigerant can be maintained at a predetermined pressure or lower.

More specifically, if the pressure of the high-pressure refrigerant passed through the refrigerant evaporator 90 by the pressure control tube 200 is maintained at a predetermined pressure or less, the refrigerant evaporator 50 and the refrigerant evaporator 90 simultaneously The refrigerant flowing through the refrigerant evaporator 90 having a relatively high pressure flows through the second suction pipe 94 and flows into the first suction pipe 24 through which the refrigerant passing through the refrigerant evaporator 50, The pressure difference between the combined refrigerant is reduced in the process of being sucked into the compressor 20 through the merging suction pipe 24a while being joined together at the connection pipe 98 of the refrigerating unit 1 and the cooling unit 2 ) Can be reduced.

Therefore, according to the second embodiment of the present invention, the refrigerant pressure of the refrigerant evaporator (90) is lowered by influencing the freezing portion (1) and the cooling portion (2) Can be prevented.

That is, since the pressure regulating tube 200 has the structure in which the shaft tube portion 210 is formed, the pressure of the refrigerant passing through the high-pressure refrigerant evaporator 90 while passing through the axial tube portion 210 is maintained at a constant pressure The pressure difference between the low pressure refrigerant passing through the freezer evaporator 50 and the first suction pipe 24 through the connection pipe 98 decreases so that the influence of the pressure difference between the refrigerant and the low pressure refrigerant is greatly reduced, It is possible to prevent a phenomenon that the temperature of the freezing portion rises and the frozen food is damaged by raising the refrigerant pressure of the freezing portion evaporator 50.

In the second embodiment of the present invention, the refrigerant passing through the freezing section 1 and the refrigerant passing through the cooling section 2 are combined through the merging suction pipe 24a having a predetermined length and sucked into the compressor 20, Since the pressure control pipe 200 is provided on the second suction pipe 94 to join the refrigerant passing through the freezing portion 1 in a state where the pressure of the high pressure refrigerant passing through the refrigerant evaporator 90 is lowered, The interference can be minimized and the performance degradation of the system can be prevented.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments. While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, But fall within the scope of the appended claims.

1:
2:
10: engine section
20, 26: Compressor
22, 27: Discharge piping
22a: Discharge ball
24: First suction pipe
24a: Combined suction piping
28: Manifold folder
28a:
28b: first inlet
28c: second suction port
28d: communicating ball
28e: Coupling ball
30: condenser
40; heat transmitter
42: Transfer piping
44: freezing solenoid valve
50; Freezer evaporator
52: Transfer piping
60: Receiver
70: Dryer
72: Transfer piping
80: Expansion valve
90: Evaporator for cooling air
90a; capillary
91: Cooling unit condenser
92: cooling liquid refrigerant transfer pipe
93: Connection piping
94: Second suction pipe
96: Solenoid valve for cooling
98: Connector
100: Defrosting piping
110: defrost solenoid valve
200: Pressure regulating tube
210:
220:

Claims (9)

A compressor (20) driven by an engine part of the vehicle;
A condenser (30) for condensing the refrigerant discharged from the compressor (20);
A freezer evaporator 50 for supplying cool air to the freezer while passing through the refrigerant passing through the condenser 30;
A cooling unit evaporator (90) for cooling the inside of the refrigerator compartment;
A first suction pipe (24) connected to suck the refrigerant having passed through the refrigerant evaporator (50) to the compressor (20);
The refrigerant evaporator 90 and the compressor 20 are connected to the compressor 20 independently of the first suction pipe 24 so that the refrigerant exiting the outlet side of the refrigerant evaporator 90 is sucked into the compressor 20. [ A second suction pipe (94) connected between the first suction pipe (20) and the second suction pipe (94);
And a refrigerating and cooling system for a refrigerator with a pressure control function.
The method according to claim 1,
The pressure of the refrigerant passing through the refrigerant evaporator 90 is adjusted on the second suction pipe 94 to pass through the refrigerant evaporator 50 and then through the first suction pipe 24 to the compressor 20 Further comprising a pressure control tube (200) for reducing the pressure difference of the refrigerant sucked into the freezer evaporator (50) so that the refrigerant pressure of the freezer evaporator (50) is not increased. .
The method of claim 2,
The pressure regulating tube (200)
And a shaft portion 220 that is formed between the coupling portion 210 and reduced to be smaller than the inner diameter of the coupling portion 210 is included in the coupling portion 210. The coupling portion 210 is formed at both ends and connected to the second suction pipe 94, Wherein the refrigerant-cooling system has a pressure control function.
The method according to any one of claims 1 to 3,
The compressor 20 further includes a manifold 28 for connecting the discharge pipe 22 and the first and second suction pipes 24 and 94 for allowing the refrigerant discharged from the compressor 20 to flow therethrough Cooling system of a refrigerator with a pressure regulating function.
The method of claim 4,
The manifold (28)
A discharge port 28a connected to the discharge pipe 22 and first and second suction ports 28b and 28c connected to the first and second suction pipes 24 and 94, A refrigeration - cooling system for a refrigerator having a function.
The method of claim 5,
In the manifold 28, the refrigerant sucked through the first and second suction pipes 24 and 94 is communicated through the first and second suction ports 28b and 28c, And a hole (28d). The refrigeration-cooling system of the refrigerator as claimed in claim 1,
A compressor (20) driven by an engine part of the vehicle;
A condenser (30) for condensing the refrigerant discharged from the compressor (20);
A freezer evaporator 50 for supplying cool air to the freezer while passing through the refrigerant passing through the condenser 30;
A cooling unit evaporator (90) for cooling the inside of the refrigerator compartment;
A first suction pipe (24) provided to allow the refrigerant having passed through the refrigerant evaporator (50) to be sucked back to the compressor (20);
A second suction pipe 94 connected to the first suction pipe 24 while the refrigerant flowing through the outlet of the refrigerant evaporator 90 flows to suck the refrigerant into the compressor 20;
The first and second suction pipes 24 and 94 are connected to connect the refrigerant flowing through the refrigerant evaporator 50 and the refrigerant flowing through the refrigerant evaporator 90 to be sucked into the compressor 20, A merged suction pipe 24a;
The refrigerant is supplied to the compressor through the first suction pipe 24 after passing through the refrigerant evaporator 50. The refrigerant passing through the first suction pipe 94 is supplied to the second suction pipe 94, A pressure control pipe 200 for reducing the pressure difference of the refrigerant sucked into the evaporator 20 so that the refrigerant pressure of the freezer evaporator is not increased;
/ RTI >
The pressure regulating tube (200)
And a shaft portion (220) formed between the coupling portion (210) and the shaft portion (220) so as to be smaller than an inner diameter of the coupling portion (210) A refrigeration - cooling system for a refrigerator with adjustable function.
delete The method of claim 7,
The first and second suction pipes 24 and 94 are connected to the first suction pipe 24 and the second suction pipe 24 so that the respective refrigerants flowing through the first and second suction pipes 24 and 94 are joined to the combined suction pipe 24a, And the connection pipe (98) is formed at a position where the connection pipe (98) is located.

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