Integrated system for realizing high and low temperature test environment

Abstract

The utility model discloses an integrated system for realizing a high and low temperature test environment, which relates to the technical field of environment test and comprises a refrigerating unit for supplying cold to a test bin and a heating unit for supplying heat to the test bin, the heating unit comprises an electric heating assembly for heating the test bin and a constant temperature assembly for keeping the temperature of the test bin; the constant temperature assembly comprises an evaporator, a compressor and a heat exchanger, and the heat exchanger, the compressor and the evaporator are connected in series through a connecting pipeline to form a closed circulation path. Compared with the prior art in which an electric heating assembly is used for heating and high-temperature maintenance is also used, according to the utility model, the electric heating assembly is used for heating and the constant-temperature assembly is used for subsequent high-temperature maintenance, so that the energy consumed by high-temperature maintenance can be reduced, and the test cost is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of environmental testing, in particular to an integrated system for realizing high and low temperature testing environments. Background Art

[0002] At present, in order to carry out test experiments under a constant temperature (high and low temperature) environment, a test chamber is generally used to create a constant temperature environment. To create and maintain a low-temperature environment inside the test chamber, a low-temperature refrigeration unit is generally used to first reduce the internal environment temperature of the test chamber to a specified temperature, and then the low-temperature refrigeration unit is used to maintain the temperature. To create and maintain a high-temperature environment inside the test chamber, an electric heating unit is generally used to first increase the internal environment of the test chamber to a specified temperature, and then the electric heating unit is used to maintain the temperature.

[0003] The electric heating unit mentioned above needs to first undergo a heating process and then maintain high temperature. After actual testing, technicians found that during the high-temperature test, the high-temperature maintenance time accounts for 93% of the entire working time of the electric heating unit. High-temperature maintenance is achieved by using the electric heating unit in the existing technology. Since the resources consumed by the electric heating unit per unit time are more than those of other heating units, the energy consumed by the electric heating unit is more, which will increase the test cost. In the high-temperature maintenance state, the overall operating load of the electric heating unit only needs to maintain the heat leakage of the test chamber itself. The use of electric heating units to maintain it in the existing technology will cause a large amount of excess heat to be lost, resulting in data waste.

[0004] To this end, we propose an integrated system that realizes high and low temperature testing environments to solve the above problems. Utility Model Content

[0005] The purpose of the present invention is to solve the problems in the prior art and to propose an integrated system for realizing high and low temperature test environments. The system improves the constant temperature component in the heating unit. Compared with the high energy consumption when the electric heating component is used to maintain the high temperature of the test chamber in the prior art, the constant temperature component of the present invention consumes less energy per unit time when maintaining the high temperature of the test chamber, thereby reducing the testing cost.

[0006] In order to solve the above problems, the present invention provides the following technical solutions:

[0007] An integrated system for achieving high and low temperature test environments, comprising a refrigeration unit for supplying cooling to a test chamber and a heating unit for supplying heating to the test chamber; the heating unit comprises an electric heating component for heating the test chamber and a constant temperature component for maintaining the temperature of the test chamber;

[0008] The constant temperature component includes an evaporator, a compressor and a heat exchanger, and the heat exchanger, the compressor and the evaporator are connected in series through connecting pipes to form a closed circulation path;

[0009] The constant temperature component also includes a driving source and a radiator located in the test chamber, and the driving source, the radiator and the heat exchanger are connected in series through connecting pipes to form a closed heat exchange path.

[0010] As a further solution of the present invention: the constant temperature component also includes a first side branch pipe and a second side branch pipe, both of which have opening and closing functions, the inlet end of the first side branch pipe is connected to the outlet end of the heat exchanger, and the outlet end of the first side branch pipe is connected to the inlet end of the compressor, so that the first side branch pipe and the evaporator are arranged in parallel; the inlet end of the second side branch pipe is connected to the outlet end of the compressor, and the outlet end of the second side branch pipe is connected to the inlet end of the compressor, so that the second side branch pipe and the compressor are arranged in parallel.

[0011] As a further solution of the present invention: a first on-off valve and a first expansion valve are sequentially connected to the first branch pipe along the flow direction of the refrigerant, and the opening and closing functions are realized by the first on-off valve.

[0012] As a further solution of the present invention: a second on-off valve is connected to the second branch pipeline, and the on-off function is realized by relying on the second on-off valve.

[0013] As a further solution of the present invention: a dryer is connected to the connecting pipe between the heat exchanger and the evaporator.

[0014] As a further solution of the present invention: a third on-off valve and a second expansion valve are sequentially connected to the connecting pipe between the dryer and the evaporator along the flow direction of the refrigerant, and the passage formed by the third on-off valve, the second expansion valve and the evaporator is arranged in parallel with the second branch pipe.

[0015] As a further solution of the present invention: the energy-saving system also includes a temperature control system, the electric heating component and the compressor are both electrically connected to the temperature control system, and the electric heating component and the compressor are both controlled by the temperature control system.

[0016] As a further solution of the present invention: the driving source is a water pump.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] 1. Through the setting of the circulation path, the compressor in the circulation path can deliver high-temperature and high-pressure gaseous refrigerant to the condenser. The high-temperature and high-pressure gaseous refrigerant can dissipate its own heat into the test chamber through the condenser, thereby maintaining the high temperature in the test chamber and facilitating the subsequent work. Compared with the existing technology that uses electric heating components for both heating and maintaining high temperature, the present invention uses electric heating components for heating and constant temperature components for subsequent high temperature maintenance. This can reduce the energy consumed by high temperature maintenance and reduce testing costs.

[0019] 2. By setting up the first and second side branch pipes, the first side branch pipe can be used to deliver low-temperature, low-pressure liquid refrigerant to the compressor inlet, and the second side branch pipe can be used to deliver high-temperature, high-pressure gaseous refrigerant to the compressor inlet. These two types of refrigerant can be mixed with the low-temperature, low-pressure gaseous refrigerant delivered to the compressor inlet by the circulation passage, thereby changing the temperature of the refrigerant at the compressor inlet to meet different cooling capacity requirements in the warehouse;

[0020] 3. Through the setting of the heat exchange passage, the heat of the gaseous refrigerant in the circulation passage can be transferred to the liquid fluid in the heat exchange passage, and finally the heat is dissipated into the test chamber through the liquid fluid. The utility model uses liquid fluid to transfer heat to the test chamber. The liquid fluid has stable heat transfer and strong anti-interference ability, and has a good effect on maintaining the high temperature environment in the test chamber. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The present invention will be further described below with reference to the accompanying drawings.

[0022] Figure 1 This is a schematic structural diagram of the first embodiment of the present invention;

[0023] Figure 2 It is a structural diagram of the second embodiment of the present utility model.

[0024] In the figure: 1. Electric heating component; 2. Constant temperature component; 201. Evaporator; 202. Compressor; 203. Condenser; 204. Connecting pipe; 3. First branch pipe; 4. Second branch pipe; 5. First expansion valve; 6. Second on-off valve; 7. Dryer; 8. Third on-off valve; 9. Second expansion valve; 10. First on-off valve; 11. Heat exchanger; 12. Drive source; 13. Radiator; a. Test chamber. DETAILED DESCRIPTION

[0025] The following will be combined with the accompanying drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0026] Example 1:

[0027] like Figure 1 As shown, an energy-saving system for achieving a high and low temperature test environment includes a refrigeration unit for cooling the test chamber a, a heating unit for heating the test chamber a, and a temperature control system. The heating unit includes an electric heating component 1 for heating the test chamber a and a constant temperature component 2 for maintaining the temperature of the test chamber a. The temperature control system is electrically connected to the electric heating component 1 and the constant temperature component 2. It should be noted that the refrigeration component in this embodiment is a conventional technical means of the prior art and will not be described in detail here to avoid tediousness.

[0028] When the test chamber a requires a low-temperature test environment, the heating unit does not work and the refrigeration unit starts working. The refrigeration unit first lowers the test chamber a to a specified low temperature, and then uses the refrigeration unit to maintain the low-temperature environment; when the test chamber a requires a high-temperature test environment, the refrigeration unit does not work and the heating unit starts working. The electric heating component 1 in the heating unit first heats the test chamber a to a specified high temperature, and then the temperature control system controls the electric heating component 1 to stop working and enables the constant temperature component 2 to start working. The constant temperature component is used to replenish the heat leakage in the high-temperature environment of the test chamber a in time, so that the high-temperature environment of the test chamber a can be maintained continuously, which is convenient for the subsequent use of the test chamber a to carry out corresponding testing work.

[0029] In summary, in this embodiment, the heating unit is composed of an electric heating component 1 and a constant temperature component 2. After the electric heating component 1 is used to heat the test chamber a to a specified high temperature, the constant temperature component 2 is used to maintain the high temperature environment of the test chamber a. Compared with the prior art method of using the electric heating component 1 for both heating and maintaining high temperature, this embodiment uses the electric heating component 1 for heating and the constant temperature component 2 for subsequent high temperature maintenance, which can reduce the energy consumed by high temperature maintenance and reduce the testing cost.

[0030] The design of the above-mentioned constant temperature component 2 is as follows:

[0031] (1) The constant temperature component 2 includes an evaporator 201, a compressor 202 and a condenser 203, wherein the condenser 203 is located in the test chamber a, and the condenser 203, the compressor 202 and the evaporator 201 are connected in series through the connecting pipe 204 to form a closed circulation path; the connecting pipe 204 between the condenser 203 and the evaporator 201 is connected to the dryer 7; the connecting pipe 204 between the dryer 7 and the evaporator 201 is connected to the third on-off valve 8 and the second expansion valve 9 in sequence along the flow direction of the refrigerant.

[0032] Under normal circumstances, the refrigerant in the circulation path is a low-temperature, low-pressure gaseous refrigerant. When the compressor 202 works, it will convert the low-temperature, low-pressure gaseous refrigerant at its inlet into a high-temperature, high-pressure gaseous refrigerant and discharge it from its outlet. It is then transported to the condenser 203 via the connecting pipe 204. After passing through the condenser 203, the high-temperature, high-pressure gaseous refrigerant is converted into a low-temperature, high-pressure liquid refrigerant. In this process, the high-temperature, high-pressure gaseous refrigerant transfers heat to the condenser 203, and the condenser 203 dissipates the heat into the test chamber a to maintain the high temperature. Then, after the low-temperature, high-pressure liquid refrigerant is discharged from the condenser 203, the low-temperature, high-pressure liquid refrigerant is transported to the evaporator 201 via the second expansion valve 9. At the same time, after passing through the second expansion valve 9, the low-temperature, high-pressure liquid refrigerant is converted into a low-temperature, low-pressure liquid refrigerant. The low-temperature, low-pressure liquid refrigerant is transported into the evaporator 201 and converted into a low-temperature, low-pressure gaseous refrigerant after absorbing heat. Finally, it is transported to the inlet of the compressor 202 via the connecting pipe 204 to realize the circulation flow.

[0033] (2) On the basis of the above-mentioned circulation path, since the low-temperature and low-pressure gaseous refrigerant in the circulation path needs to be heated and pressurized by the compressor 202, under normal use of the circulation path, the amount of low-temperature and low-pressure gaseous refrigerant delivered to the inlet of the compressor 202 per unit time is fluctuating. In order to ensure that the compressor 202 can deliver a continuously controllable amount of refrigerant to the condenser 203, the thermostatic component 2 is provided to further include a first side branch pipe 3 and a second side branch pipe 4, the inlet end of the first side branch pipe 3 is connected to the outlet end of the condenser 203, and the outlet end of the first side branch pipe 3 is connected to the inlet end of the compressor 202, so that the first side branch pipe 3 and the evaporator 201 are arranged in parallel; the inlet end of the second side branch pipe 4 is connected to the outlet end of the compressor 202, and the outlet end of the second side branch pipe 4 is connected to the inlet end of the compressor 202, so that the second side branch pipe 4 and the compressor 202 are arranged in parallel.

[0034] The first and second side pipes 3 and 4 both have opening and closing functions to enable them to be connected to the circulation path for operation. Specifically, a first on-off valve 10 and a second on-off valve 6 can be provided on the first and second side pipes 3 and 4, respectively, to achieve the corresponding opening and closing functions. Furthermore, a first expansion valve 5 can be connected to the first side pipe 3. It should be noted that the first on-off valve 10 and the second on-off valve 6 can not only control the opening and closing of the first and second side pipes 3 and 4, but also realize the opening degree of the first and second side pipes 3 and 4 when connected to the circulation path.

[0035] When the circulation path is working normally, the first on-off valve 10 on the first side branch pipe 3 and the second on-off valve 6 on the second side branch pipe 4 are both opened, so that the first side branch pipe 3 and the second side branch pipe 4 are both connected to the circulation path, and then the working conditions are as follows: after the low-temperature and low-pressure gaseous refrigerant enters the inlet of the compressor 202, it is converted into a high-temperature and high-pressure gaseous refrigerant and discharged from its outlet. A part of the high-temperature and high-pressure gaseous refrigerant at the outlet of the compressor 202 is transported to the condenser 203 for normal heating work, and the other part is transported to the second side branch pipe 4 and returned Return to the inlet of the compressor 202; the high-temperature and high-pressure gaseous refrigerant passing through the condenser 203 will be converted into a low-temperature and high-pressure liquid refrigerant, and this part of the liquid refrigerant will be diverted to the passage where the evaporator 201 is located and the first side branch pipe 3 respectively, and then through the second expansion valve 9 and the low-temperature and high-pressure liquid refrigerant in the passage where the evaporator 201 is located will be converted into a low-temperature and low-pressure gaseous refrigerant and transported to the inlet of the compressor 202, and the low-temperature and high-pressure liquid refrigerant passing through the first expansion valve 5 on the first side branch pipe 3 will be converted into a low-temperature and low-pressure liquid refrigerant and transported to the inlet of the compressor 202.

[0036] Combining the types of refrigerants transported by the circulation path, the first side branch pipe 3 and the second side branch pipe 4, when the three types of refrigerants converge at the inlet of the compressor 202, since the low-temperature and low-pressure gaseous refrigerant transports the largest amount per unit time, the other two types of refrigerants will be mixed into the low-temperature and low-pressure gaseous refrigerant. The mixing process can regulate the temperature of the low-temperature and low-pressure gaseous refrigerant. The temperature regulation can change the suction amount of the low-temperature and low-pressure gaseous refrigerant at the inlet of the compressor 202, and then adjust the amount of refrigerant that the compressor 202 can transport per unit time. This type of regulation can enable the compressor 202 to transport the corresponding flow rate of refrigerant according to the actual environmental requirements, and the transportation effect is good.

[0037] Of course, on the basis of setting up a temperature control system, the electric heating component 1 and the compressor 202 can also be electrically connected to the temperature control system, and the electric heating component 1 and the compressor 202 are both controlled by the temperature control system. After using the electric heating component 1 to heat up the test chamber a, the temperature control system controls the electric heating component 1 to turn off and controls the compressor 202 to turn on, so that the circulation path where the compressor 202 is located works to provide high temperature maintenance.

[0038] Example 2:

[0039] During actual use, technicians discovered through testing that while the circulation path in Example 1 can save resources, since it uses compressor 202 to deliver high-temperature, high-pressure gaseous refrigerant to condenser 203 for heating, the gaseous refrigerant has poor anti-interference ability during the heating process, its own temperature changes are unstable, and thus the effect of maintaining the high-temperature environment in test chamber a is poor. Therefore, based on Example 1, this embodiment improves the constant temperature component 2 and proposes an integrated system for achieving high and low temperature test environments. The specific improvements are as follows:

[0040] like Figure 2 As shown, an integrated system for realizing high and low temperature test environment includes a heat exchanger 11, a radiator 13 and a driving source 12 (which can be a water pump). The heat exchanger 11 is connected to the circulation path to replace the condenser 203 in the circulation path. At the same time, the radiator 13, the driving source 12 and the heat exchanger 11 are connected in series through the connecting pipe 204 to form a heat exchange path. When the circulation path is working normally, the compressor 202 delivers high-temperature and high-pressure gaseous refrigerant to the heat exchanger 11. The liquid fluid in the heat exchanger 11 (which can be 50% ethylene glycol + water) will absorb the heat of the refrigerant. Then the driving source 12 is used to drive the liquid fluid in the heat exchange path to flow into the radiator 13. The liquid fluid will dissipate its own heat through the radiator 13 to the test chamber a for high temperature maintenance.

[0041] In this embodiment, through the setting of the heat exchange passage, the heat of the gaseous refrigerant in the circulation passage can be transferred to the liquid fluid in the heat exchange passage, and finally the heat is dissipated into the test chamber a through the liquid fluid. Compared with the gaseous refrigerant in Example 1 for heat transfer, the liquid refrigerant is used to transfer heat to the test chamber a in this embodiment. The liquid refrigerant has stable heat transfer and strong anti-interference ability, and has a better effect on maintaining the high temperature environment in the test chamber a.

[0042] The above describes an embodiment of the present invention in detail. However, the above content is only a preferred embodiment of the present invention and should not be considered to limit the scope of implementation of the present invention. All equivalent changes and improvements made within the scope of the present invention should still fall within the scope of the patent application of the present invention.

Claims

1. An integrated system for realizing high and low temperature test environment, characterized in that: The invention comprises a refrigeration unit for supplying cooling to a test chamber (a) and a heating unit for supplying heat to the test chamber (a); the heating unit comprises an electric heating component (1) for heating the test chamber (a) and a constant temperature component (2) for maintaining the temperature of the test chamber (a); The constant temperature component (2) includes an evaporator (201), a compressor (202), and a heat exchanger (11), and the heat exchanger (11), the compressor (202), and the evaporator (201) are connected in series via a connecting pipe (204) to form a closed circulation path; The constant temperature component (2) further comprises a driving source (12) and a radiator (13) located in the test chamber (a), and the driving source (12), the radiator (13) and the heat exchanger (11) are connected in series via a connecting pipe (204) to form a closed heat exchange path.

2. The integrated system for realizing high and low temperature test environment according to claim 1, characterized in that: The thermostatic component (2) further comprises a first side branch pipe (3) and a second side branch pipe (4), both of which have an opening and closing function. The inlet end of the first side branch pipe (3) is connected to the outlet end of the heat exchanger (11), and the outlet end of the first side branch pipe (3) is connected to the inlet end of the compressor (202), so that the first side branch pipe (3) and the evaporator (201) are arranged in parallel; the inlet end of the second side branch pipe (4) is connected to the outlet end of the compressor (202), and the outlet end of the second side branch pipe (4) is connected to the inlet end of the compressor (202), so that the second side branch pipe (4) and the compressor (202) are arranged in parallel.

3. The integrated system for realizing high and low temperature test environment according to claim 2, characterized in that: The first branch pipe (3) is connected to a first on-off valve (10) and a first expansion valve (5) in sequence along the flow direction of the refrigerant, and the opening and closing functions thereof are realized by the first on-off valve (10).

4. The integrated system for realizing high and low temperature test environment according to claim 3, characterized in that: The second branch pipe (4) is connected to a second on-off valve (6), and the on-off function is realized by the second on-off valve (6).

5. The integrated system for realizing high and low temperature test environment according to claim 4, characterized in that: A dryer (7) is connected to the connecting pipe (204) between the heat exchanger (11) and the evaporator (201).

6. The integrated system for realizing high and low temperature test environment according to claim 5, characterized in that: A third on-off valve (8) and a second expansion valve (9) are sequentially connected to the connecting pipe (204) between the dryer (7) and the evaporator (201) along the flow direction of the refrigerant, and a passage formed by the third on-off valve (8), the second expansion valve (9) and the evaporator (201) is arranged in parallel with the second branch pipe (4).

7. An integrated system for realizing high and low temperature test environment according to claim 1 or 2, characterized in that: The energy-saving system also includes a temperature control system. The electric heating component (1) and the compressor (202) are both electrically connected to the temperature control system, and the electric heating component (1) and the compressor (202) are both controlled by the temperature control system.

8. The integrated system for realizing high and low temperature testing environment according to claim 1, characterized in that: The driving source (12) is a water pump.

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