Environmental simulation test box pipeline system capable of adjusting return air temperature
By installing pressure and temperature sensors in the environmental simulation test chamber, combined with a thermal expansion valve and a thermal bypass valve, the problem of compressor damage caused by unstable return gas temperature was solved, thus achieving compressor protection.
Patent Information
- Application Number
- CN202423033755.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-09
- Publication Date
- 2025-11-14
- Estimated Expiration
- 2034-12-09
AI Technical Summary
If the temperature of the refrigerant returning to the environmental simulation test chamber is too high or too low, it may damage the compressor. Existing technology makes it difficult to effectively regulate the return gas temperature to protect the compressor.
By setting pressure and temperature sensors to monitor the return gas temperature, and using thermal expansion valves and thermal bypass valves to regulate refrigerant flow, the return gas temperature is prevented from being too high or too low, thus protecting the compressor.
It achieves effective regulation of return gas temperature, prevents compressor damage, and protects the safe operation of the compressor.
Smart Images
Figure CN223550662U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to an environmental simulation test chamber, and more particularly to a pipeline system for an environmental simulation test chamber capable of adjusting the return gas temperature. Background Technology
[0002] Environmental simulation test chambers are widely used in the product development stage. They can test the performance of products under various simulated climatic environments by measuring changes in temperature and humidity within the chamber. Environmental simulation test chambers can also be used for product aging tests.
[0003] The refrigeration system in the environmental simulation test chamber includes a set of refrigeration piping systems. After passing through the evaporator, the refrigerant needs to flow back into the compressor. If the temperature of the returning gaseous refrigerant is too high, it may damage the compressor; if the temperature of the returning refrigerant is too low, it may contain a gas-liquid mixture. The liquid refrigerant in the mixture will cause liquid slugging in the compressor, leading to compressor damage. Summary of the Invention
[0004] To address the shortcomings of existing technologies, this utility model provides an environmental simulation test chamber piping system capable of adjusting the return gas temperature, thus preventing the refrigerant temperature in the return compressor from becoming too high or too low, thereby protecting the compressor. To achieve the above technical objectives, the technical solution adopted in this utility model embodiment is as follows:
[0005] This utility model embodiment provides an environmental simulation test chamber piping system capable of adjusting the return gas temperature, including a compressor, oil separator, condenser, liquid storage tank, dryer filter, first solenoid valve, thermal bypass valve, second solenoid valve, thermal expansion valve, third solenoid valve, capillary tube, evaporator, main return gas pipe, pressure sensor, and temperature sensor.
[0006] The compressor outlet is connected to one end of an oil separator via a pipeline, and the other end of the oil separator is connected to one end of a condenser and one end of a first solenoid valve via a pipeline. The oil return port of the oil separator is connected to the compressor. The other end of the first solenoid valve is connected to one end of a thermal bypass valve via a pipeline, and the other end of the thermal bypass valve is connected to the main return gas pipe via a pipeline. The other end of the condenser is connected to the inlet of a liquid receiver tank via a pipeline, and the outlet of the liquid receiver tank is connected to one end of a dryer filter via a pipeline. The other end of the dryer filter is connected to one end of a second solenoid valve and one end of a third solenoid valve via a pipeline. The other end of the second solenoid valve is connected to one end of a thermal expansion valve via a pipeline, and the other end of the thermal expansion valve is connected to the main return gas pipe via a pipeline. The other end of the third solenoid valve is connected to one end of a capillary tube via a pipeline, and the other end of the capillary tube is connected to one end of an evaporator evaporation channel via a pipeline, and the other end of the evaporator evaporation channel is connected to the main return gas pipe. The main return gas pipe is connected to the compressor inlet.
[0007] A pressure sensor and a temperature sensor are installed on the pipeline near the compressor inlet. The pressure sensor and the temperature sensor are respectively connected to a thermostatic expansion valve. The thermostatic expansion valve is controlled by the pressure sensor and the temperature sensor.
[0008] Furthermore, the compressor outlet is provided with a first shock-absorbing hose, which is connected to a pipeline near the oil separator via a first pipe clamp.
[0009] Furthermore, the compressor inlet is provided with a second shock-absorbing hose, which is connected to the main return pipe via a second pipe clamp.
[0010] Furthermore, the storage tank is equipped with a high-pressure gauge and a first pressure relief valve.
[0011] Furthermore, a low-pressure gauge and a second pressure relief valve are installed on the pipeline at the compressor inlet.
[0012] Furthermore, a sight glass is provided on the pipeline at the other end of the drying filter.
[0013] The beneficial effects of the technical solution provided by this utility model embodiment are: this utility model can monitor the return gas temperature and prevent the refrigerant temperature of the return compressor from being too high or too low through the action of the thermostatic expansion valve and the thermostatic bypass valve, thereby protecting the compressor. Attached Figure Description
[0014] Figure 1 This is a schematic diagram of the pipeline system structure in an embodiment of the present utility model. Detailed Implementation
[0015] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain this utility model and are not intended to limit this utility model.
[0016] like Figure 1 As shown in the figure, the environmental simulation test chamber piping system capable of adjusting the return gas temperature proposed in this utility model embodiment includes a compressor 1, an oil separator 2, a condenser 3, a liquid storage tank 4, a dryer filter 5, a first solenoid valve 6, a thermal bypass valve 7, a second solenoid valve 8, a thermal expansion valve 9, a third solenoid valve 10, a capillary tube 11, an evaporator 12, a main return gas pipe 13, a pressure sensor 14, and a temperature sensor 15.
[0017] The outlet of compressor 1 is connected to one end of oil separator 2 via a pipeline, and the other end of oil separator 2 is connected to one end of condenser 3 and one end of first solenoid valve 6 via a pipeline; the oil return port of oil separator 2 is connected to compressor 1; the other end of first solenoid valve 6 is connected to one end of thermal bypass valve 7 via a pipeline, and the other end of thermal bypass valve 7 is connected to main return gas pipe 13 via a pipeline; the other end of condenser 3 is connected to the inlet of liquid storage tank 4 via a pipeline, and the outlet of liquid storage tank 4 is connected to one end of dryer filter 5 via a pipeline; dryer filter... The other end of 5 is connected to one end of the second solenoid valve 8 and one end of the third solenoid valve 10 via a pipeline; the other end of the second solenoid valve 8 is connected to one end of the thermal expansion valve 9 via a pipeline, and the other end of the thermal expansion valve 9 is connected to the main return gas pipe 13 via a pipeline; the other end of the third solenoid valve 10 is connected to one end of the capillary tube 11 via a pipeline, and the other end of the capillary tube 11 is connected to one end of the evaporation channel of the evaporator 12 via a pipeline, and the other end of the evaporation channel of the evaporator 12 is connected to the main return gas pipe 13; the main return gas pipe 13 is connected to the inlet of the compressor 1;
[0018] A pressure sensor 14 and a temperature sensor 15 are installed on the pipeline near the inlet of compressor 1. The pressure sensor 14 and the temperature sensor 15 are respectively connected to the thermostatic expansion valve 9. The thermostatic expansion valve 9 is controlled by the pressure sensor 14 and the temperature sensor 15.
[0019] Compressor 1 pressurizes the refrigerant to form a high-temperature, high-pressure gaseous refrigerant. Lubricating oil is separated by oil separator 2, and the gaseous refrigerant then enters condenser 3 for condensation, typically forming a room-temperature, high-pressure liquid refrigerant. However, in summer, the refrigerant exiting condenser 3 may be a vapor-liquid mixture. Liquid receiver 4 can increase the liquid saturation of the refrigerant. The room-temperature, high-pressure liquid refrigerant is dried and impurities are filtered out by dryer filter 5, and then enters capillary tube 11 after passing through third solenoid valve 10. Capillary tube 11 reduces the refrigerant pressure, improving the cooling effect of evaporator 12. The refrigerant (liquid, containing some gas) exiting capillary tube 11 enters evaporator 12, absorbs heat, and evaporates, producing a cooling effect. The gaseous refrigerant (i.e., return gas) exiting evaporator 12 flows back to compressor 1 through main return gas pipe 13 for repressurization.
[0020] The thermal expansion valve 9 is controlled by the pressure sensor 14 and the temperature sensor 15. When the return gas temperature is too high, the thermal expansion valve 9 will automatically increase its opening, allowing some room temperature high pressure liquid refrigerant to enter the main return gas pipe 13, evaporate and absorb heat, thus reducing the return gas temperature. When the return gas pressure is too high, the thermal expansion valve 9 will automatically decrease its opening.
[0021] When the return air temperature is too low in winter, the first solenoid valve 6 can be opened, and a small amount of high-temperature and high-pressure gaseous refrigerant enters the main return pipe 13 through the thermal bypass valve 7, preventing the presence of liquid refrigerant in the main return pipe 13 from causing liquid slugging in the compressor 1.
[0022] More preferably, the compressor 1 outlet is provided with a first shock-absorbing hose 16, and the first shock-absorbing hose 16 is connected to a pipeline near the oil separator 2 through a first pipe clamp 17;
[0023] More preferably, the compressor 1 inlet is provided with a second shock-absorbing hose 18, and the second shock-absorbing hose 18 is connected to the main return gas pipe 13 through a second pipe clamp 19;
[0024] The first shock-absorbing hose 16 and the second shock-absorbing hose 18 can prevent the vibration of the compressor 1 from affecting other components.
[0025] More preferably, the liquid storage tank 4 is equipped with a high-pressure gauge 20 and a first pressure relief valve 21; it can observe the refrigerant pressure at the liquid storage tank 4 and prevent the refrigerant pressure from being too high;
[0026] More preferably, a low-pressure gauge 22 and a second pressure relief valve 23 are provided on the pipeline at the inlet of the compressor 1; this allows for observation of the return gas pressure and prevents excessive pressure of the refrigerant returning to the compressor.
[0027] More preferably, a sight glass 24 is provided on the pipe at the other end of the dryer filter 5 for observing the liquid saturation of the refrigerant.
[0028] Finally, it should be noted that the above specific embodiments are only used to illustrate the technical solution of this utility model and not to limit it. Although this utility model has been described in detail with reference to the embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solution of this utility model without departing from the spirit and scope of the technical solution of this utility model, and all such modifications and substitutions should be covered within the scope of the claims of this utility model.
Claims
1. A piping system for an environmental simulation test chamber capable of adjusting the return gas temperature, characterized in that, Includes compressor (1), oil separator (2), condenser (3), liquid receiver (4), dryer filter (5), first solenoid valve (6), thermal bypass valve (7), second solenoid valve (8), thermal expansion valve (9), third solenoid valve (10), capillary tube (11), evaporator (12), main return gas pipe (13), pressure sensor (14), and temperature sensor (15); The outlet of the compressor (1) is connected to one end of the oil separator (2) via a pipeline, and the other end of the oil separator (2) is connected to one end of the condenser (3) and one end of the first solenoid valve (6) via a pipeline; the oil return port of the oil separator (2) is connected to the compressor (1); the other end of the first solenoid valve (6) is connected to one end of the thermal bypass valve (7) via a pipeline, and the other end of the thermal bypass valve (7) is connected to the main return gas pipe (13) via a pipeline; the other end of the condenser (3) is connected to the inlet of the liquid storage tank (4) via a pipeline, and the outlet of the liquid storage tank (4) is connected to one end of the dryer filter (5) via a pipeline; the dryer filter (5) The other end is connected to one end of the second solenoid valve (8) and one end of the third solenoid valve (10) through a pipeline; the other end of the second solenoid valve (8) is connected to one end of the thermal expansion valve (9) through a pipeline, and the other end of the thermal expansion valve (9) is connected to the main return gas pipe (13) through a pipeline; the other end of the third solenoid valve (10) is connected to one end of the capillary tube (11) through a pipeline, and the other end of the capillary tube (11) is connected to one end of the evaporation channel of the evaporator (12) through a pipeline, and the other end of the evaporation channel of the evaporator (12) is connected to the main return gas pipe (13); the main return gas pipe (13) is connected to the inlet of the compressor (1); A pressure sensor (14) and a temperature sensor (15) are provided on the pipeline near the inlet of the compressor (1). The pressure sensor (14) and the temperature sensor (15) are respectively connected to the thermostatic expansion valve (9). The thermostatic expansion valve (9) is controlled by the pressure sensor (14) and the temperature sensor (15).
2. The environmental simulation test chamber piping system capable of adjusting return gas temperature as described in claim 1, characterized in that, The compressor (1) outlet is provided with a first shock-absorbing hose (16), which is connected to a pipeline near the oil separator (2) via a first pipe clamp (17).
3. The environmental simulation test chamber piping system capable of adjusting return gas temperature as described in claim 1, characterized in that, The compressor (1) is equipped with a second shock-absorbing hose (18) at the inlet, and the second shock-absorbing hose (18) is connected to the main return pipe (13) through a second pipe clamp (19).
4. The environmental simulation test chamber piping system capable of adjusting return gas temperature as described in claim 1, characterized in that, The liquid storage tank (4) is equipped with a high pressure gauge (20) and a first pressure relief valve (21).
5. The environmental simulation test chamber piping system capable of adjusting return gas temperature as described in claim 1, characterized in that, The compressor (1) is equipped with a low pressure gauge (22) and a second pressure relief valve (23) on the pipeline at the inlet.
6. The environmental simulation test chamber piping system capable of adjusting return gas temperature as described in claim 1, characterized in that, A sight glass (24) is provided on the pipeline at the other end of the dryer filter (5).