CN115342559A

CN115342559A - Refrigerating system and one-driving-multiple environment simulation test box

Info

Publication number: CN115342559A
Application number: CN202210998160.4A
Authority: CN
Inventors: 杨涛
Original assignee: Jiangsu Tomilo Environmental Testing Equipment Co Ltd
Current assignee: Jiangsu Tomilo Environmental Testing Equipment Co Ltd
Priority date: 2022-08-19
Filing date: 2022-08-19
Publication date: 2022-11-15

Abstract

The invention discloses a refrigerating system and a multi-split environment simulation test box, wherein the refrigerating system comprises an evaporator assembly, and a gas-liquid separator, a compressor assembly, an oil separator and a condenser which are sequentially connected, an outlet of the evaporator assembly is connected with the gas-liquid separator, an inlet of the evaporator assembly is connected with the condenser, the evaporator assembly comprises a plurality of evaporators, and each evaporator is communicated with the condenser and the gas-liquid separator in turn. In order to ensure that the oil return of the compressor is normal, the oil separators connected with the lower reaches of the compressor assembly are provided with a plurality of oil return pipes, the compressor assembly comprises the compressor and an oil return pipeline, one end of each oil return pipeline is connected with an oil return port of the compressor, and the other end of each oil return pipeline is connected with an oil outlet of the oil separator. The oil return amount can be effectively ensured by arranging the plurality of oil separators so as to meet the normal work of the compressor connected with the plurality of evaporators, and the oil outlet of each oil separator is connected with an oil return pipeline, so that the oil return rate can be increased, and the compressor can be ensured to have sufficient lubricating oil to ensure the normal operation.

Description

Refrigerating system and one-driving-multiple environment simulation test box

Technical Field

The invention relates to the technical field of environmental simulation test boxes, in particular to a refrigerating system and a multi-split environmental simulation test box.

Background

For the environment simulation test box, the standard oil filling amount on the refrigerating system depends on the oil content volume, and for the one-driving-more environment simulation test box, the standard oil filling amount and the oil return amount of one oil content cannot meet the requirement that when a plurality of groups of evaporators exist, sufficient oil can be guaranteed to return to the compressor, so that after the one-driving-more environment simulation test box is used for a long time, the oil in the compressor is limited by the oil return capacity of the oil content, and can slowly exist in each evaporator and pipeline, so that the oil in the compressor is less and less, and the normal operation of the compressor is influenced.

Therefore, a refrigeration system and a test chamber for simulating a multi-split environment are needed to solve the above problems.

Disclosure of Invention

An object of the present invention is to provide a refrigeration system which can ensure that a compressor normally operates with a sufficient amount of oil even when there are a plurality of sets of evaporators.

As the conception, the technical scheme adopted by the invention is as follows:

the refrigeration system comprises an evaporator assembly, and a gas-liquid separator, a compressor assembly, an oil separator and a condenser which are sequentially connected, wherein an outlet of the evaporator assembly is connected with the gas-liquid separator, an inlet of the evaporator assembly is connected with the condenser, the evaporator assembly comprises a plurality of evaporators, and each evaporator is in rotational flow communication with the condenser and the gas-liquid separator;

the compressor assembly comprises a compressor and an oil return pipeline, the oil separators are arranged in a plurality of positions and are sequentially arranged at the downstream of the compressor, the compressor is provided with an oil return port, each oil separator is provided with an oil outlet, and the oil outlet of each oil separator is connected to the oil return port through the oil return pipeline.

Optionally, the oil return pipeline includes an oil return main pipeline and a plurality of oil return branch pipelines, one end of the oil return main pipeline is communicated with the oil return port, and the other ends of the oil return branch pipelines are connected with the plurality of oil outlets in a one-to-one manner.

Optionally, an outlet of the compressor is connected with an inlet of the oil separator through a first pipeline, an outlet of the oil separator is connected with an inlet of the condenser through a second pipeline, an outlet of the condenser is connected with an inlet of the evaporator through a third pipeline, an outlet of the evaporator is connected with an inlet of the compressor through a fourth pipeline, and the gas-liquid separator is arranged on the fourth pipeline;

refrigerating system still includes first branch road and second branch road, the one end of first branch road connect in the third pipeline, the other end connect in the fourth pipeline just is located gas-liquid separator's upper reaches, the one end of second branch road connect in the second pipeline, the other end connect in the fourth pipeline just is located gas-liquid separator's upper reaches.

Optionally, a temperature sensor is arranged on the first pipeline, a first electromagnetic valve is arranged on the first branch, a second electromagnetic valve is arranged on the second branch, and the temperature sensor is electrically connected to the first electromagnetic valve and the second electromagnetic valve respectively.

Optionally, a thermostatic expansion valve is arranged on the first branch, and a bulb of the thermostatic expansion valve is arranged in front of an inlet of the compressor.

Optionally, the refrigeration system further comprises a first monitoring pipeline connected to the fourth pipeline, and a second monitoring pipeline connected to the third pipeline, wherein a first pressure gauge is arranged on the first monitoring pipeline, a second pressure gauge is arranged on the second monitoring pipeline, and the first pressure gauge and the second pressure gauge are electrically connected to the pressure controller.

Optionally, an energy regulating valve is further disposed on the second branch, the refrigeration system further includes a pressure regulating pipeline, one end of the pressure regulating pipeline is connected to the energy regulating valve, the other end of the pressure regulating pipeline is connected to the fourth pipeline and located at the downstream of the gas-liquid separator, and the first monitoring pipeline is connected to the fourth pipeline through the pressure regulating pipeline.

Optionally, the condenser further comprises a cooling water inlet pipeline and a cooling water outlet pipeline, a condenser pressure regulating valve is arranged on the cooling water outlet pipeline, and a pressure sensing switch of the condenser pressure regulating valve is communicated with the third pipeline.

Optionally, the fourth pipeline includes two parallel fourth branch pipelines, one of the fourth branch pipelines is provided with an evaporation pressure regulating valve, and the other of the fourth branch pipelines is provided with a third electromagnetic valve.

Another objective of the present invention is to provide a test chamber for simulating multi-split environment, which has a plurality of test chambers capable of working alternately, and can ensure that the compressor can still operate normally under the condition of multi-split.

As the conception, the technical scheme adopted by the invention is as follows:

the one-driving-more environment simulation test box comprises a plurality of test boxes and the refrigerating system, wherein at least one evaporator is arranged in each test box.

The invention has the beneficial effects that:

the refrigeration system provided by the invention comprises an evaporator assembly, and a gas-liquid separator, a compressor assembly, an oil separator and a condenser which are sequentially connected, wherein an outlet of the evaporator assembly is connected with the gas-liquid separator, an inlet of the evaporator assembly is connected with the condenser, the evaporator assembly comprises a plurality of evaporators, each evaporator is communicated with the condenser and the gas-liquid separator in turn, and the plurality of evaporators can be driven to work in turn by one compressor assembly. In order to ensure that the oil return of the compressor is normal, the oil separators connected with the lower reaches of the compressor assembly are provided with a plurality of oil return pipes, the compressor assembly comprises the compressor and an oil return pipeline, one end of each oil return pipeline is connected with an oil return port of the compressor, and the other end of each oil return pipeline is connected with an oil outlet of the oil separator. The oil return amount can be effectively ensured by arranging the plurality of oil separators so as to meet the normal work of the compressor connected with the plurality of evaporators, and the oil outlet of each oil separator is connected with an oil return pipeline, so that the oil return rate can be increased, and the compressor can be ensured to have sufficient lubricating oil to ensure the normal operation.

The one-driving-more environment simulation test box comprises a plurality of test boxes and the refrigerating system, wherein at least one evaporator is arranged in each test box, and the normal operation of the test box can be still ensured under the condition that the number of compressors is one.

Drawings

FIG. 1 is a schematic diagram of a refrigeration system according to an embodiment of the present invention;

fig. 2 is a schematic structural diagram of an evaporator assembly provided in an embodiment of the present invention.

In the figure:

1. a compressor; 2. an oil separator; 3. a condenser; 4. an evaporator assembly; 41. an evaporator; 42. a control valve; 5. an oil return main pipeline; 6. an oil return separation pipeline; 7. a gas-liquid separator; 8. drying the filter; 9. a shock absorbing tube; 10. an endoscopy lens; 11. a temperature sensor; 12. a first pressure gauge; 13. a second pressure gauge; 14. a pressure controller; 15. a fan; 16. a thermostatic expansion valve; 161. a temperature sensing bulb; 17. an energy regulating valve; 18. a condenser pressure regulating valve; 19. an evaporation pressure regulating valve; 20. a first solenoid valve; 21. a second solenoid valve; 22. a third electromagnetic valve; 23. a needle valve;

1001. a first pipeline; 1002. a second pipeline; 1003. a third pipeline; 1004. a fourth pipeline; 2001. a first branch; 2002. a second branch circuit; 3001. a pressure regulating line; 3002. a first monitoring line; 3003. a second monitoring line; 4001. a cooling water inlet pipe; 4002. a cooling water outlet pipeline.

Detailed Description

In order to make the technical problems solved, the technical solutions adopted and the technical effects achieved by the present invention clearer, the technical solutions of the present invention are further described below by way of specific embodiments with reference to the accompanying drawings. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some but not all of the features relevant to the present invention are shown in the drawings.

In the description of the present invention, unless expressly stated or limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, e.g., as meaning permanently connected, removably connected, or integral to one another; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

In the description of the present embodiment, the terms "upper", "lower", "left", "right", and the like are used based on the orientations and positional relationships shown in the drawings, and are only for convenience of description and simplicity of operation, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used only for descriptive purposes and are not intended to be limiting.

The technical scheme of the invention is further explained by the specific implementation mode in combination with the attached drawings.

As shown in fig. 1 to 2, the present embodiment provides a refrigeration system including an evaporator assembly 4, a compressor assembly, an oil separator 2, and a condenser 3. The compressor assembly, the oil separator 2 and the condenser 3 are sequentially connected, an outlet of the evaporator assembly 4 is connected with the compressor assembly, and an inlet of the evaporator assembly 4 is connected with the condenser 3, so that the heat exchange circulation of the refrigerating system is realized. Optionally, the evaporator assembly 4 includes a plurality of evaporators 41, and the plurality of evaporators 41 are respectively disposed in different test chambers, that is, one compressor assembly can drive the plurality of evaporators 41 to work in turn. In order to avoid the situation that the refrigerant quantity in the system pipeline is too large due to the alternate work of the plurality of evaporators 41, so that the liquid refrigerant flows into the compressor 1, a gas-liquid separator 7 is arranged between the outlet of the evaporator assembly 4 and the inlet of the compressor assembly.

In order to ensure that the oil return of the compressor 1 is normal, the downstream of the compressor assembly is connected with an oil separator 2, the compressor assembly comprises the compressor 1 and an oil return pipeline, one end of the oil return pipeline is connected with an oil return port of the compressor 1, and the other end of the oil return pipeline is connected with an oil outlet of the oil separator 2, so that lubricating oil flows back to the compressor 1, the amount of the lubricating oil entering each pipeline of the refrigeration system is reduced, and the compressor 1 is ensured to have sufficient lubricating oil to ensure normal operation. Optionally, the oil separator 2 is provided with a plurality of oil separators 2, the plurality of oil separators 2 are sequentially arranged at the downstream of the compressor 1, and an oil outlet of each oil separator 2 is connected with an oil return port through an oil return pipeline. The oil return amount can be effectively ensured by arranging the plurality of oil separators 2 so as to meet the normal work of the compressor 1 connected with the plurality of evaporators 41, and the oil outlet of each oil separator 2 is connected with an oil return pipeline so as to improve the oil return rate.

Optionally, the oil return pipeline includes an oil return main pipeline 5 and a plurality of oil return branch pipelines 6, one end of each oil return main pipeline 5 is communicated with one end of each oil return branch pipeline 6, the other end of each oil return main pipeline 5 is connected with an oil return port, and the other end of each oil return branch pipeline 6 is connected with a plurality of oil outlets one to one. In the present embodiment, two oil separators 2 are provided.

Further alternatively, as shown in fig. 1, in the present embodiment, the outlet of the compressor 1 is connected to the inlet of the oil separator 2 through a first pipeline 1001, the outlet of the oil separator 2 is connected to the inlet of the condenser 3 through a second pipeline 1002, the outlet of the condenser 3 is connected to the inlet of the evaporator assembly 4 through a third pipeline 1003, the outlet of the evaporator 41 is connected to the inlet of the compressor 1 through a third pipeline 1003, and the gas-liquid separator 7 is disposed on a fourth pipeline 1004. Preferably, a shock absorbing pipe 9 is disposed on each of the first and

fourth pipes

1001 and 1004 to absorb shock generated when the compressor 1 operates. Preferably, the third line 1003 and the fourth line 1004 are provided with a needle valve 23, and the refrigerant system can be filled with refrigerant through the needle valve 23.

On this basis, in order to ensure the normal operation of the refrigeration system, the refrigeration system further includes a first branch 2001 and a second branch 2002, and one end of the first branch 2001 is connected to the third line 1003, and the other end is connected to the fourth line 1004 and is located upstream of the gas-liquid separator 7. And the second branch 2002 has one end connected to the second pipe 1002 and the other end connected to the fourth pipe 1004 and located upstream of the gas-liquid separator 7. Since the third line 1003 is a line after the outlet of the condenser 3 and a low-temperature refrigerant that exchanges heat with the condenser 3 flows therein, the temperature of the refrigerant at the inlet of the compressor 1 can be reduced by the first branch 2001 when the temperature of the refrigerant flowing into the compressor 1 is high. Since the second pipe 1002 is a pipe before the inlet of the condenser 3, and a high-temperature refrigerant that does not exchange heat with the condenser 3 flows therein, the temperature of the refrigerant at the inlet of the compressor 1 can be raised through the second branch 2002 when the temperature of the refrigerant flowing into the compressor 1 is low.

Preferably, a temperature sensor 11 is disposed on the first pipeline 1001, a first solenoid valve 20 is disposed on the first branch 2001, a second solenoid valve 21 is disposed on the second branch 2002, and the temperature sensor 11 is electrically connected to the first solenoid valve 20 and the second solenoid valve 21, so that a control end of the refrigeration system can control opening degrees of the first solenoid valve 20 and the second solenoid valve 21 respectively according to feedback of the temperature sensor 11, so as to adjust temperature of refrigerant at an outlet of the compressor 1, and ensure normal operation of the compressor 1 under a preset load.

Preferably, the first branch 2001 is further provided with a thermal expansion valve 16, and a bulb 161 of the thermal expansion valve 16 is disposed in front of an inlet of the compressor 1. The thermal expansion valve 16 senses the superheat of the refrigerant through the bulb 161, so as to adjust the opening degree of the thermal expansion valve 16, thereby controlling the flow rate of the refrigerant entering the evaporator 41. The thermostatic expansion valve 16 allows fine tuning of the amount of refrigerant in the refrigeration system during use of the refrigeration system.

Still further optionally, the refrigeration system further includes a first monitoring pipeline 3002 and a second monitoring pipeline 3003, the first monitoring pipeline 3002 is connected to the fourth pipeline 1004, the second monitoring pipeline 3003 is connected to the third pipeline 1003, the first monitoring pipeline 3002 is provided with a first pressure gauge 12, and the second monitoring pipeline 3003 is provided with a second pressure gauge 13. The first pressure gauge 12 is used for monitoring the pressure before the inlet of the compressor 1, the second pressure gauge 13 is used for monitoring the pressure after the outlet of the condenser 3, and whether the compressor 1 and the condenser 3 are in a normal working state or not is judged by monitoring the pressure values of the first pressure gauge 12 and the second pressure gauge 13. Preferably, the first pressure gauge 12 and the second pressure gauge 13 are electrically connected to the pressure controller 14, and the pressure controller 14 is configured to force the refrigeration system to stop when the pressure detected by the first pressure gauge 12 or the second pressure gauge 13 exceeds a safety range. Preferably, a fan 15 is further provided at the pressure controller 14 for cooling the pressure controller 14.

Optionally, an energy regulating valve 17 is further disposed on the second branch 2002, the refrigeration system further includes a pressure regulating line 3001, one end of the pressure regulating line 3001 is connected to the energy regulating valve 17, the other end of the pressure regulating line 3001 is connected to the fourth line 1004 and is located downstream of the gas-liquid separator 7, and the first monitoring line 3002 is connected to the fourth line 1004 through the pressure regulating line 3001. By providing the energy regulating valve 17 and the pressure regulating pipeline 3001 to regulate the energy of the compressor 1, when the inlet pressure of the compressor 1 drops to a set value, the energy regulating valve 17 is opened, the high-temperature gas flowing out through the outlet of the compressor 1 can automatically flow back to the inlet of the compressor 1, and the smaller the inlet pressure of the compressor 1 is, the larger the opening degree of the energy regulating valve 17 is.

Optionally, the condenser 3 further includes a cooling water inlet line 4001 and a cooling water outlet line 4002, a condenser pressure regulating valve 18 is disposed on the cooling water outlet line 4002, and a pressure sensing switch of the condenser pressure regulating valve 18 is communicated with the third line 1003. That is, the opening degree of the condenser pressure regulating valve 18 is adjusted by sensing the circulation pressure of the refrigerant so as to allow an appropriate amount of cooling water to flow through the condenser 3.

Optionally, the fourth pipeline 1004 includes two parallel fourth branch pipelines, one of the fourth branch pipelines is provided with the evaporation pressure regulating valve 19, and the other of the fourth branch pipelines is provided with the electromagnetic valve, which are alternatively opened to adjust the refrigeration efficiency of the evaporator 41, so that the test chamber has two conditions of frost and frost-free.

Optionally, the refrigeration system further includes a dry filter 8, the dry filter 8 is disposed on the third line 1003 and upstream of the first branch line 2001, and the dry filter 8 is configured to filter moisture and impurities in the refrigeration system. A liquid viewing mirror is further arranged at the downstream of the drying filter 8 and used for viewing the state of the refrigerant.

The embodiment also provides an environmental simulation test box, which comprises a plurality of test boxes and the refrigeration system, wherein each test box is provided with at least one evaporator 41. The refrigerant in the evaporator 41 exchanges heat with the ambient air in the test chamber to bring the ambient temperature in the test chamber to the temperature required for the simulation test.

The foregoing embodiments are merely illustrative of the principles and features of this invention, which is not limited to the above-described embodiments, but rather is susceptible to various changes and modifications without departing from the spirit and scope of the invention, which changes and modifications are within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims

1. The refrigeration system is characterized by comprising an evaporator assembly (4), and a gas-liquid separator (7), a compressor assembly, an oil separator (2) and a condenser (3) which are sequentially connected, wherein an outlet of the evaporator assembly (4) is connected with the gas-liquid separator (7), an inlet of the evaporator assembly (4) is connected with the condenser (3), the evaporator assembly (4) comprises a plurality of evaporators (41), and each evaporator (41) is communicated with the condenser (3) and the gas-liquid separator (7) in turn;

the compressor unit spare includes compressor (1) and oil return line, oil separator (2) are provided with a plurality ofly, and are a plurality of oil separator (2) set gradually in the low reaches of compressor (1), compressor (1) has the oil return opening, every oil separator (2) all have the oil-out, every the oil-out of oil separator (2) all passes through oil return line connect in the oil return opening.

2. The refrigerating system according to claim 1, wherein the oil return pipeline comprises an oil return main pipeline (5) and a plurality of oil return branch pipelines (6), one end of the oil return main pipeline is communicated with one end of the oil return main pipeline, the other end of the oil return main pipeline (5) is connected with the oil return port, and the other ends of the oil return branch pipelines (6) are connected with the oil outlets in a one-to-one manner.

3. A refrigeration system according to claim 1, characterized in that the outlet of the compressor (1) is connected to the inlet of the oil separator (2) by a first line (1001), the outlet of the oil separator (2) is connected to the inlet of the condenser (3) by a second line (1002), the outlet of the condenser (3) is connected to the inlet of the evaporator (41) by a third line (1003), the outlet of the evaporator (41) is connected to the inlet of the compressor (1) by a fourth line (1004), and the gas-liquid separator (7) is arranged on the fourth line (1004);

the refrigeration system further comprises a first branch (2001) and a second branch (2002), wherein one end of the first branch (2001) is connected to the third pipeline (1003), the other end of the first branch is connected to the fourth pipeline (1004) and located upstream of the gas-liquid separator (7), one end of the second branch (2002) is connected to the second pipeline (1002), and the other end of the second branch is connected to the fourth pipeline (1004) and located upstream of the gas-liquid separator (7).

4. A refrigeration system according to claim 3, characterized in that a temperature sensor (11) is arranged on the first pipeline (1001), a first solenoid valve (20) is arranged on the first branch (2001), a second solenoid valve (21) is arranged on the second branch (2002), and the temperature sensor (11) is electrically connected to the first solenoid valve (20) and the second solenoid valve (21), respectively.

5. A refrigeration system according to claim 3, characterized in that a thermostatic expansion valve (16) is arranged in the first branch (2001), and a bulb (161) of the thermostatic expansion valve (16) is arranged in front of the inlet of the compressor (1).

6. A refrigeration system according to claim 3, further comprising a first monitoring line (3002) connected to the fourth line (1004), and a second monitoring line (3003) connected to the third line (1003), wherein the first monitoring line (3002) is provided with a first pressure gauge (12), the second monitoring line (3003) is provided with a second pressure gauge (13), and both the first pressure gauge (12) and the second pressure gauge (13) are electrically connected to a pressure controller (14).

7. The refrigeration system according to claim 6, wherein an energy regulating valve (17) is further disposed on the second branch (2002), the refrigeration system further comprises a pressure regulating line (3001), one end of the pressure regulating line (3001) is connected to the energy regulating valve (17), the other end of the pressure regulating line is connected to the fourth line (1004) and is located downstream of the gas-liquid separator (7), and the first monitoring line (3002) is connected to the fourth line (1004) through the pressure regulating line (3001).

8. A refrigeration system according to claim 3, wherein the condenser (3) further comprises a cooling water inlet line (4001) and a cooling water outlet line (4002), a condenser pressure regulating valve (18) is arranged on the cooling water outlet line (4002), and a pressure sensing switch of the condenser pressure regulating valve (18) is communicated with the third line (1003).

9. A refrigerating system according to claim 3, characterized in that said fourth line (1004) comprises two parallel-connected fourth partial lines, and in that one of said fourth partial lines is provided with a regulating valve (19) for the evaporation pressure and the other with a third solenoid valve (22).

10. One-driving-many environmental simulation test chamber, characterized in that it comprises a plurality of test chambers and a refrigeration system according to any one of claims 1 to 9, each of said test chambers being provided with at least one evaporator (41).