Direct-cooling single-machine double-temperature refrigeration control device

Abstract

The utility model discloses a direct-cooling single-machine double-temperature refrigeration control device, which adopts the arrangement of a single restrictor (capillary tube), and the single restrictor (capillary tube) is arranged between the output end of a condenser and the input end of a freezing evaporation tube, so that the non-uniform refrigerant distribution caused by different resistances of the two capillary tubes is effectively avoided; the problem of uneven liquid distribution is avoided, meanwhile, the cost is saved, the refrigerating pipeline directly extends to the refrigerating box from the freezing box, and the refrigerating efficiency is effectively improved; the electromagnetic valve is installed at the tail end of the refrigeration evaporation pipe, on-off of refrigerants is accurately controlled, the risk that the refrigerants excessively flow back to the compressor is reduced, therefore, the liquid impact phenomenon is avoided, stable operation of a refrigeration system is guaranteed, the tail end of the refrigeration evaporation pipe is a low-pressure air return section, high-pressure impact is reduced, and the service life of a product is prolonged.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of refrigeration device, concretely is a kind of direct cooling single machine double-temperature refrigeration control device. BACKGROUND

[0002] With the progress of society, the performance requirements of commercial refrigerators are increasing. The popular single machine double-temperature kitchen refrigerator on the market uses double capillary tube technology to evaporate refrigeration for the pipelines of the freezer and refrigerator compartments respectively. The temperature controller adjusts the temperature of the refrigerator compartment by controlling the solenoid valve. When the temperature of the refrigerator compartment reaches the preset value, the temperature controller will close the corresponding solenoid valve, cutting off the flow of refrigerant in the refrigerator compartment pipeline. At this time, all the refrigerant will only pass through the freezer compartment pipeline for refrigeration. When the temperature of the freezer compartment reaches the set value, the compressor will stop working. Once the temperature of the refrigerator compartment rises to the set upper limit, the solenoid valve reopens; when the temperature of the freezer compartment also rises to the upper limit, the compressor starts again for a new round of refrigeration cycle for the refrigerator compartment and the freezer compartment, and so on.

[0003] However, the structure of the current single machine double-temperature refrigeration system has two defects:

[0004] 1. In order to ensure the uniform distribution of liquid refrigerant, the inner diameters and lengths of the two capillary tubes of the refrigerator compartment and the freezer compartment must be very close. If the resistance difference of the capillary tubes of the refrigerator compartment or the freezer compartment is too large, it will cause uneven distribution of refrigerant in the refrigerator compartment or the freezer compartment, and thus affect the refrigeration effect of the refrigerator compartment or the freezer compartment;

[0005] 2. The solenoid valve is welded at the position after the condenser and before the capillary tube, which bears the highest pressure of the system. Under long-term operation and pressure impact, the risk of solenoid valve failure increases significantly. SUMMARY

[0006] Therefore, it is necessary to provide a direct cooling single machine double-temperature refrigeration control device. To solve the problem of uneven liquid distribution caused by double capillary tubes in the refrigeration process, which leads to poor refrigeration; and to reduce the probability of solenoid valve failure.

[0007] A direct cooling single machine double temperature refrigeration control device, comprising a refrigerator cabinet, and a compressor, a condenser, a drying filter, a throttling device, a first three-way pipe, a freezing evaporation pipe, a refrigeration evaporation pipe and a solenoid valve installed in the refrigerator cabinet in sequence, the output end of the compressor is connected with the input end of the condenser, the output end of the condenser is connected with the input end of the drying filter, the output end of the drying filter is connected with the input end of the throttling device, the output end of the throttling device is connected with the input end of the freezing evaporation pipe, the output end of the freezing evaporation pipe is connected with the input end of the first three-way pipe, the two output ends of the first three-way pipe are respectively connected with the input end of the refrigeration evaporation pipe and the gas return end of the compressor, the output end of the refrigeration evaporation pipe is connected with the input end of the solenoid valve, and the output end of the solenoid valve is connected with the gas return end of the compressor.

[0008] In one embodiment, the direct cooling single machine double temperature refrigeration control device further comprises a condenser fan installed at one end of the condenser in the refrigerator cabinet for heat dissipation of the condenser.

[0009] In one embodiment, the direct cooling single machine double temperature refrigeration control device further comprises a second three-way pipe, the two input ends of the second three-way pipe are respectively connected with the output end of the first three-way pipe and the output end of the solenoid valve, and the output end is connected with the gas return end of the compressor.

[0010] In one embodiment, the first three-way pipe and the second three-way pipe are copper pipes.

[0011] In one embodiment, the freezing evaporation pipe comprises a freezing top evaporation pipe and a freezing side evaporation pipe, the input end of the freezing top evaporation pipe is connected with the output end of the throttling device, the output end of the freezing top evaporation pipe is connected with the input end of the freezing side evaporation pipe, and the output end of the freezing side evaporation pipe is connected with the input end of the first three-way pipe.

[0012] In one embodiment, the output end of the condenser is connected with the input end of the drying filter through a condenser outlet pipe.

[0013] In one embodiment, the first three-way pipe has one input end and two output ends, and the second three-way pipe has two input ends and one output end.

[0014] In one embodiment, the throttling device is a capillary tube.

[0015] The straight cooling single-machine double-temperature refrigeration control device adopts the single throttler (capillary tube) to effectively avoid the uneven distribution of refrigerant caused by the different resistance of two capillary tubes, avoid the problem of uneven distribution, save the cost, and effectively improve the refrigeration efficiency. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 FIG. 1 is a refrigeration principle schematic diagram of a straight cooling single-machine double-temperature refrigeration control device according to an embodiment of the present application;

[0017] Figure 2 FIG. 4 is a refrigeration pipe structure schematic diagram of the straight cooling single-machine double-temperature refrigeration control device according to an embodiment of the present application;

[0018] Figure 3 FIG. 4 is a refrigeration pipe structure schematic diagram of the straight cooling single-machine double-temperature refrigeration control device according to an embodiment of the present application;

[0019] Figure 4 FIG. 4 is a refrigeration pipe structure schematic diagram of the straight cooling single-machine double-temperature refrigeration control device according to an embodiment of the present application; DETAILED DESCRIPTION

[0020] To make the above objectives, features and advantages of the present application more apparent, specific embodiments of the present application will be described in detail below with reference to the drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application. However, the present application can be practiced in a variety of ways beyond the specific embodiments described herein without departing from the scope of the present application, and those skilled in the art can make similar improvements without departing from the spirit of the present application, so the present application is not limited to the specific embodiments disclosed below.

[0021] It should be noted that when an element is considered to be "connected" to another element, it can be directly connected to the other element or a middle element can exist simultaneously. In contrast, when an element is referred to as being "directly" connected to another element, no middle element exists.

[0022] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0023] like Figures 1-4 As shown, a direct-cooling single-unit dual-temperature refrigeration control device includes a freezer body 1, and a compressor 2, a condenser 3, a dryer filter 4, a throttle valve 5, a first three-way pipe 6, a freezing evaporator pipe 7, a refrigeration evaporator pipe 8, and a solenoid valve 9, which are sequentially installed at preset positions on the freezer body 1. The output end of the compressor 2 is connected to the input end of the condenser 3, the output end of the condenser 3 is connected to the input end of the dryer filter 4, the output end of the dryer filter 4 is connected to the input end of the throttle valve 5, the output end of the throttle valve 5 is connected to the input end of the freezing evaporator pipe 7, the output end of the freezing evaporator pipe 7 is connected to the input end of the first three-way pipe 6, the two output ends of the first three-way pipe 6 are respectively connected to the input end of the refrigeration evaporator pipe 8 and the return gas end of the compressor 2, the output end of the refrigeration evaporator pipe 8 is connected to the input end of the solenoid valve 9, and the output end of the solenoid valve 9 is connected to the return gas end of the compressor 2.

[0024] The throttle 5 is a capillary tube. The evaporator 7 includes a top evaporator 71 and a side evaporator 72. The input end of the top evaporator 71 is connected to the output end of the throttle 5, and the output end of the top evaporator 71 is connected to the input end of the side evaporator 72. The output end of the side evaporator 72 is connected to the input end of the first three-way pipe 6. The output end of the condenser 3 is connected to the input end of the dryer filter 4 through the condenser outlet pipe 12.

[0025] After the refrigerator is powered on, the compressor 2 starts to start, and the refrigerant is compressed into high-temperature and high-pressure gas into the condenser 3, and the refrigerant enters the dry filter 4 through the condenser outlet pipe 12, and then the refrigerant is changed into low-temperature and low-pressure liquid through the throttling device 5 (capillary tube) 10, when the refrigerant enters the evaporator pipe in the box, first through the freezing top evaporator pipe 71, and then to the freezing side evaporator pipe 72, at this time a part of the refrigerant returns to the compressor 2 through the first three-way pipe 6, and the other part of the refrigerant reaches the refrigeration evaporator pipe 8. In this way, all the freezing evaporator pipe 7 and the refrigeration evaporator pipe 8 start to absorb heat, so that the refrigerator starts to refrigerate, because the temperature of the refrigeration box only needs to reach 0 degrees or more, so the refrigeration running time of the refrigeration box is less than that of the freezing box, at this time the electromagnetic valve 9 acts, closes the outlet of the refrigeration evaporator pipe 8, so that the refrigerant no longer passes through the refrigeration evaporator pipe 8, and all the refrigerant enters the compressor 2 from the first three-way pipe 6, and the refrigeration of the freezing box is not affected. When the freezing box reaches the set value, the compressor 2 stops running. When the temperature of the freezing box or the refrigeration box is higher than the set value, the compressor 2 restarts to continue refrigeration, and so on.

[0026] In this way, the direct cooling single machine double temperature refrigeration control device adopts the setting of a single throttling device 5 (capillary tube), and the single throttling device 5 (capillary tube) is arranged between the output end of the condenser 3 and the input end of the freezing evaporator pipe 7, which effectively avoids the uneven distribution of refrigerant caused by the different resistances of the two capillary tubes 5, avoids the problem of uneven liquid distribution, and saves costs. The refrigeration pipeline directly extends from the freezing box to the refrigeration box, which effectively improves the refrigeration efficiency; the electromagnetic valve 9 is installed at the end of the refrigeration evaporator pipe 8, which accurately controls the on-off of the refrigerant, reduces the risk of excessive reflux of the refrigerant to the compressor, thereby avoiding the occurrence of liquid hammer phenomenon, and ensuring the stable operation of the refrigeration system. Moreover, the end of the refrigeration evaporator pipe 8 is a low-pressure return gas section, which reduces the high-pressure impact and prolongs the service life of the product.

[0027] In one embodiment, the direct cooling single machine double temperature refrigeration control device further comprises a condensing fan 10 installed in the refrigerator box body 1 close to one end of the condenser 3, for cooling the condenser 3.

[0028] In this way, the condensing fan 10 operates to cool the condenser 3, and after the refrigerant is cooled, it enters the dry filter 4 through the condenser outlet pipe 12, so that the refrigeration effect of the refrigerant is better.

[0029] In one of the embodiments, the direct cooling single-machine double-temperature refrigeration control device further comprises a second three-way pipe 11, two input ends of the second three-way pipe 11 are connected with an output end of the first three-way pipe 6 and an output end of the electromagnetic valve 9 respectively, and an output end is connected with a back gas end of the compressor 2; the first three-way pipe 6 and the second three-way pipe 11 are copper pipes; the first three-way pipe 6 is of an entering end and two output ends structure, and the second three-way pipe 11 is of two entering ends and one output ends structure.

[0030] In this way, the first three-way pipe 6 and the second three-way pipe 11 are copper pipes, the copper pipes have high strength and can bear large pressure and tension, and are suitable for use in high-pressure and high-temperature environment. In addition, the copper pipes have strong resistance to humid environment and are not easy to be corroded, thereby ensuring long-term stable operation of the refrigeration system and reducing maintenance cost.

[0031] The two input ends of the second three-way pipe 11 are a refrigeration back gas pipe 111 and a refrigeration back gas pipe 112 respectively, and the output end is a total back gas pipe 113, the total back gas pipe 113 is connected with a suction port of the compressor 2.

[0032] The technical features of the above embodiments can be combined arbitrarily, and to make the description simple, all possible combinations of the technical features in the above embodiments are not described, however, as long as the combinations of the technical features do not exist contradictory, it should be considered that it is within the scope of the present application.

[0033] The above embodiments only express several implementation manners of the present application, the description is more specific and detailed, but it should not be understood as a limitation on the scope of the present application. It should be pointed out that for ordinary skilled in the art, without departing from the concept of the present application, a number of modifications and improvements can be made, which all belong to the protection scope of the present application. Therefore, the protection scope of the present application patent should be subject to the appended claims.

Claims

1. A direct cooling single machine dual temperature refrigeration control device, characterized in that: The direct cooling single-machine double-temperature refrigeration control device comprises a refrigerator box body, and a compressor, a condenser, a drying filter, a throttler, a first three-way pipe, a freezing evaporation pipe, a refrigeration evaporation pipe and a solenoid valve which are sequentially installed at preset positions of the refrigerator box body.

2. A direct cooling single unit dual temperature refrigeration control device according to claim 1, characterized in that: The direct cooling single-machine double-temperature refrigeration control device further comprises a condensing fan which is installed at one end of the refrigerator box body close to the condenser and used for heat dissipation of the condenser.

3. A direct cooling single unit dual temperature refrigeration control device according to claim 1, characterized in that: The direct cooling single-machine double-temperature refrigeration control device further comprises a second three-way pipe, two input ends of the second three-way pipe are connected with an output end of the first three-way pipe and an output end of the solenoid valve respectively, and an output end is connected with a back gas end of the compressor.

4. A direct cooling single unit dual temperature refrigeration control device according to claim 3, characterized in that: The first three-way pipe and the second three-way pipe are copper pipes.

5. A direct cooling single unit dual temperature refrigeration control device according to claim 1, characterized in that: The freezing evaporation pipe comprises a freezing top evaporation pipe and a freezing side evaporation pipe, an input end of the freezing top evaporation pipe is connected with an output end of the throttler, an output end of the freezing top evaporation pipe is connected with an input end of the freezing side evaporation pipe, and an output end of the freezing side evaporation pipe is connected with an input end of the first three-way pipe.

6. A direct cooling single unit dual temperature refrigeration control device according to claim 1, characterized in that: The output end of the condenser is connected with the input end of the drying filter through a condenser outlet pipe.

7. A direct cooling single unit dual temperature refrigeration control device according to claim 4, characterized in that: The first three-way pipe has one input end and two output ends, and the second three-way pipe has two input ends and one output end.

8. A direct cooling single unit dual temperature refrigeration control device according to claim 1, characterized in that: The throttler is a capillary tube.

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