Air suction cooling device based on low-temperature heat conduction oil

Abstract

The utility model discloses an air suction cooling device based on low-temperature heat conduction oil, which is connected to a compressor inlet of a cooled main system, and comprises an air suction cooling heat exchanger connected between an evaporator outlet and a compressor inlet of the cooled main system, filled with gaseous main refrigerant and used for exchanging heat with main refrigerant of the cooled main system; heat of the main refrigerant is absorbed, so that the temperature of the main refrigerant is reduced; the driving equipment is connected between the gas cooling heat exchanger and the refrigerating unit evaporator and is used for driving the low-temperature heat-conducting oil to circulate in the pipeline; and an outlet of the refrigerating unit evaporator is connected with a pipeline electric heater for assuming the low-temperature heat-conducting oil to a set temperature. Compared with the prior art, the heat exchanger has no corrosion to a system basically, still has lower viscosity and flowability at low temperature, also has good thermal stability and thermal conductivity, not only can prolong the service life of equipment, but also can improve the heat exchange efficiency of the equipment.

Description

Technical Field

[0001] This utility model relates to the field of environmental control, and in particular to a suction cooling device based on low-temperature heat transfer oil. Background Technology

[0002] With the development of new energy vehicles, more and more technologies related to new energy vehicles need to be tackled and overcome. Among them, the research on automotive air conditioning compressor technology has become one of the conditions to ensure that new energy vehicles can be used in cold northern environments. This has led to increasingly demanding heat pump design conditions for automotive air conditioning compressors. Therefore, it is necessary to develop experimental equipment that meets the extreme heat pump conditions of automotive air conditioning compressors to ensure that the compressor's capacity can be accurately measured under low temperature and low superheat conditions.

[0003] In existing technologies, there are generally two methods to increase the outlet superheat of measuring equipment (including calorimeter methods, gas cooler methods, etc.). One method is to use a refrigeration unit for direct cooling, providing cooling to the suction line through a suction cooling heat exchanger, thereby increasing the outlet superheat of the measuring equipment. The other method is to use a refrigerant, such as ethylene glycol, LM-8, or Antifrogen, to indirectly cool the suction line of the equipment by bringing the cooling capacity of the refrigeration unit to the suction line, thus increasing the outlet superheat of the measuring equipment. However, because ethylene glycol has high viscosity and poor fluidity at low temperatures, and requires a high concentration of ethylene glycol to lower its freezing point, excessively high concentrations of ethylene glycol, LM-8, or Antifrogen can easily corrode the equipment, reducing its service life.

[0004] Therefore, there is an urgent need for a cooling device with reliability, stability, and high heat exchange efficiency. Utility Model Content

[0005] The utility model description section introduces a series of simplified concepts, all of which are simplifications of existing technologies in the field, and will be further explained in detail in the detailed description section. This utility model description section is not intended to limit the key features and essential technical features of the claimed technical solution, nor is it intended to determine the scope of protection of the claimed technical solution.

[0006] The technical problem to be solved by this utility model is to provide an air intake cooling device that uses low-temperature heat transfer oil as a heat exchange medium and has high reliability, stability and high heat exchange efficiency.

[0007] To solve the above-mentioned technical problems, this utility model provides a suction cooling device based on low-temperature heat transfer oil, which is connected to the compressor inlet of the main system being cooled, and includes:

[0008] The suction cooling heat exchanger 5 is connected between the outlet of the evaporator 1 of the main system being cooled and the inlet of the compressor. Its interior is filled with gaseous main refrigerant. It is used to exchange heat with the main refrigerant of the main system being cooled, absorb the heat of the main refrigerant, and lower the temperature of the main refrigerant.

[0009] Drive device 9, which is connected between suction cooling heat exchanger 5 and refrigeration unit evaporator 7, is used to drive low temperature heat transfer oil to circulate in the pipeline;

[0010] The evaporator 7 of the refrigeration unit has an outlet connected to an electric heater 6, which is used to heat the low-temperature heat transfer oil to a set temperature.

[0011] Preferably, in a further improvement of the air-cooling device based on low-temperature heat transfer oil, the driving device 9 is a circulating water pump.

[0012] Preferably, the improved suction cooling device based on low-temperature heat transfer oil further includes:

[0013] Pressure fluctuation mitigation device 10 is connected between the inlet of the gas cooling heat exchanger 5 and the drive device 9, and is used to eliminate pipeline pressure fluctuations caused by temperature changes of low-temperature heat transfer oil.

[0014] Preferably, the pressure fluctuation mitigation device 10 is an expansion tank, an accumulator, or a pressure damper, which is further improved from the low-temperature heat transfer oil-based suction cooling device.

[0015] Preferably, the suction cooling device based on low-temperature heat transfer oil is further improved, wherein the main system being cooled includes:

[0016] Evaporator 1, whose inlet is connected to the outlet of condenser 3, and whose outlet is connected to the inlet of suction cooling heat exchanger 5;

[0017] The compressor 4 has its inlet connected to the outlet of the suction cooling heat exchanger 5, and its outlet connected to the inlet of the condenser 3.

[0018] It should be noted that the aforementioned main cooling system should not be construed as limiting the types of main cooling systems to which this invention can be applied. The structure of the aforementioned main cooling system is an example of the simplest cooling system to which this invention can be applied; correspondingly, the intake cooling device of this invention can also be applied to more complex main cooling systems.

[0019] Preferably, the improved suction cooling device based on low-temperature heat transfer oil further includes:

[0020] Throttling device 2 is connected between the inlet of evaporator 1 and the outlet of condenser 3.

[0021] This invention uses low-temperature heat transfer oil as a refrigerant, circulating it through an oil circulation pump. It exchanges heat with the refrigeration unit in the heat exchanger, cooling it down. Then, it is electrically heated to the set temperature. Finally, it cools the main system in the suction cooling heat exchanger, increasing the outlet superheat of the main refrigerant system's measuring equipment, before returning to the oil circulation pump for further circulation. A pressure fluctuation mitigation device (expansion tank) is used to absorb or release the volume change of the low-temperature heat transfer oil caused by temperature variations.

[0022] The main refrigerant in the cooling system is compressed into a high-temperature, high-pressure gas by the compressor, and then condensed into a high-temperature, high-pressure liquid in the condenser. After passing through a throttling device, it becomes a low-temperature, low-pressure liquid again, and then evaporates in the evaporator, becoming a low-temperature, low-pressure gas. It then exchanges heat with low-temperature heat transfer oil in the suction cooling heat exchanger to lower its temperature, and finally enters the compressor. Because the cold energy brought in by the low-temperature heat transfer oil causes the temperature between the evaporator and the compressor to decrease, in order to achieve the target suction temperature, the evaporator needs to absorb more cold energy to balance the system. Therefore, the evaporator will increase the superheat at the evaporator outlet to achieve the target suction temperature and ensure the accuracy of the measurement.

[0023] The advantages of this invention are: the low-temperature heat transfer oil is basically non-corrosive to the system, and at the same time, it still has low viscosity and fluidity at low temperatures, as well as good thermal stability and thermal conductivity. This not only extends the service life of the equipment, but also improves the heat exchange efficiency of the equipment. Attached Figure Description

[0024] The accompanying drawings are intended to illustrate the general characteristics of the methods, structures, and / or materials used in specific exemplary embodiments of the present invention, supplementing the description in the specification. However, these drawings are schematic diagrams not drawn to scale and may not accurately reflect the precise structural or performance characteristics of any of the given embodiments. The drawings should not be construed as limiting or restricting the range of numerical values ​​or properties covered by the exemplary embodiments of the present invention. The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments:

[0025] Figure 1 This is a schematic diagram of the structure of the first embodiment of this utility model.

[0026] Figure 2 This is a schematic diagram of the structure of the second embodiment of this utility model.

[0027] Figure 3 This is a schematic diagram of the third embodiment of the present invention.

[0028] Explanation of reference numerals in the attached figures

[0029] Evaporator 1

[0030] Condenser 3

[0031] Compressor 4

[0032] Intake cooling heat exchanger 5

[0033] Pipeline electric heater 6

[0034] Refrigeration Unit 8

[0035] Refrigeration unit evaporator 7

[0036] Drive device 9

[0037] Pressure fluctuation relief device 10. Detailed Implementation

[0038] The following specific embodiments illustrate the implementation of this utility model. Those skilled in the art can fully understand other advantages and technical effects of this utility model from the content disclosed in this specification. This utility model can also be implemented or applied through different specific embodiments, and the details in this specification can also be applied based on different viewpoints, with various modifications or changes made without departing from the overall design concept of the utility model. It should be noted that, in the absence of conflict, the following embodiments and features in the embodiments can be combined with each other. The following exemplary embodiments of this utility model can be implemented in many different forms and should not be construed as being limited to the specific embodiments set forth herein. It should be understood that these embodiments are provided to make the disclosure of this utility model thorough and complete, and to fully convey the technical solutions of these exemplary embodiments to those skilled in the art.

[0039] It should be understood that when an element is referred to as "connected" or "joined" to another element, the element may be directly connected or joined to the other element, or there may be intermediate elements. In contrast, when an element is referred to as "directly connected" or "directly joined" to another element, there are no intermediate elements. Throughout the figures, the same reference numerals consistently denote the same elements.

[0040] This utility model provides a first embodiment of a detection circuit. This first embodiment of the detection circuit is exemplary and should not be considered as a limitation of the detection circuit of this utility model. Those skilled in the art, in accordance with the principles of this utility model, can develop other specific structures that satisfy the functions of the detection circuit of this utility model according to actual conditions. The first embodiment of the detection circuit provided by this utility model is the optimal structure among these structures. Furthermore, it should be understood that although the terms "first," "second," etc., may be used herein to describe different elements, components, regions, layers, and / or portions, these elements, components, regions, layers, and / or portions should not be limited by these terms. These terms are only used to distinguish one element, component, region, layer, or portion from another element, component, region, layer, or portion. Therefore, without departing from the teachings of the exemplary embodiments of this utility model, the first element, component, region, layer, or portion discussed below may also be referred to as the second element, component, region, layer, or portion.

[0041] First embodiment;

[0042] refer to Figure 1 As shown, this utility model provides a suction cooling device based on low-temperature heat transfer oil, which is connected to the compressor inlet of the main system being cooled, and includes:

[0043] The suction cooling heat exchanger 5 is connected between the outlet of the evaporator 1 of the main system being cooled and the inlet of the compressor. Its interior is filled with gaseous main refrigerant. It is used to exchange heat with the main refrigerant of the main system being cooled, absorb the heat of the main refrigerant, and lower the temperature of the main refrigerant.

[0044] Drive device 9, which is connected between suction cooling heat exchanger 5 and refrigeration unit evaporator 7, is used to drive low temperature heat transfer oil to circulate in the pipeline;

[0045] The evaporator 7 of the refrigeration unit has an outlet connected to an electric heater 6, which is used to heat the low-temperature heat transfer oil to a set temperature.

[0046] Among them, drive device 9 is a circulating water pump.

[0047] Second embodiment;

[0048] This utility model provides a suction cooling device based on low-temperature heat transfer oil, which is connected to the compressor inlet of the main system being cooled, and includes:

[0049] The suction cooling heat exchanger 5 is connected between the outlet of the evaporator 1 of the main system being cooled and the inlet of the compressor. Its interior is filled with gaseous main refrigerant. It is used to exchange heat with the main refrigerant of the main system being cooled, absorb the heat of the main refrigerant, and lower the temperature of the main refrigerant.

[0050] Drive device 9, which is connected between suction cooling heat exchanger 5 and refrigeration unit evaporator 7, is used to drive low temperature heat transfer oil to circulate in the pipeline;

[0051] The evaporator 7 of the refrigeration unit has an outlet connected to an electric heater 6, which is used to heat the low-temperature heat transfer oil to a set temperature.

[0052] Pressure fluctuation mitigation device 10 is connected between the intake cooling heat exchanger 5 and the inlet of the drive device 9, and is used to eliminate pipeline pressure fluctuations caused by temperature changes of low-temperature heat transfer oil.

[0053] Among them, the driving device 9 is a circulating water pump, and the pressure fluctuation relief device 10 is an expansion tank.

[0054] Third Embodiment

[0055] refer to Figure 3 As shown, this utility model provides a specific structure for a first embodiment and a second embodiment applied to a main system being cooled, comprising:

[0056] Evaporator 1, whose inlet is connected to the outlet of condenser 3, and whose outlet is connected to the inlet of suction cooling heat exchanger 5;

[0057] Compressor 4, whose inlet is connected to the outlet of suction cooling heat exchanger 5, and whose outlet is connected to the inlet of condenser 3;

[0058] Throttling device 2 is connected between the inlet of evaporator 1 and the outlet of condenser 3.

[0059] The suction cooling heat exchanger 5 is connected between the outlet of the evaporator 1 of the main system being cooled and the inlet of the compressor. Its interior is filled with gaseous main refrigerant. It is used to exchange heat with the main refrigerant of the main system being cooled, absorb the heat of the main refrigerant, and lower the temperature of the main refrigerant.

[0060] Drive device 9, which is connected between suction cooling heat exchanger 5 and refrigeration unit evaporator 7, is used to drive low temperature heat transfer oil to circulate in the pipeline;

[0061] The evaporator 7 of the refrigeration unit has an outlet connected to an electric heater 6, which is used to heat the low-temperature heat transfer oil to a set temperature.

[0062] Pressure fluctuation mitigation device 10 is connected between the inlet of the impurity gas cooling heat exchanger 5 and the drive device 9, and is used to eliminate pipeline pressure fluctuations caused by temperature changes of low-temperature heat transfer oil.

[0063] Among them, the driving device 9 is a circulating water pump, and the pressure fluctuation relief device 10 is an expansion tank.

[0064] Unless otherwise defined, all terms used herein (including technical and scientific terms) shall have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. It will also be understood that, unless explicitly defined herein, terms such as those defined in a general dictionary shall be interpreted as having the meaning consistent with their meaning in the relevant field context, and not as having an idealized or overly formal meaning.

[0065] The present invention has been described in detail above through specific embodiments and examples, but these are not intended to limit the present invention. Many modifications and improvements can be made by those skilled in the art without departing from the principles of the present invention, and these should also be considered within the scope of protection of the present invention.

Claims

1. A low temperature heat transfer oil based air cooling device connected at the inlet of the main system compressor to be cooled, characterized in that, include: The suction cooling heat exchanger (5) is connected between the outlet of the evaporator (1) of the main system being cooled and the inlet of the compressor. Its interior is filled with gaseous main refrigerant, which is used to exchange heat with the main refrigerant of the main system being cooled, absorb the heat of the main refrigerant, and lower the temperature of the main refrigerant. A drive unit (9) is connected between the suction cooling heat exchanger (5) and the evaporator (7) of the refrigeration unit, and is used to drive the low-temperature heat transfer oil to circulate in the pipeline; The evaporator (7) of the refrigeration unit has an outlet connected to an electric heater (6) for heating low-temperature heat transfer oil to a set temperature.

2. The low temperature heat transfer oil based air suction cooling device according to claim 1, characterized in that: The driving device (9) is a circulating water pump.

3. The low temperature heat transfer oil based suction cooling device as claimed in claim 1, wherein, Also includes: Pressure fluctuation mitigation device (10), which is connected between the intake cooling heat exchanger (5) and the inlet of the drive device (9), is used to eliminate pipeline pressure fluctuations caused by temperature changes of low-temperature heat transfer oil.

4. The low temperature heat transfer oil based air suction cooling device according to claim 3, characterized in that: The pressure fluctuation mitigation device (10) is an expansion tank, accumulator or pressure damper.

5. The cryogenic heat transfer oil based air cooling device according to any one of claims 1 to 4, wherein The main system being cooled includes: Evaporator (1), whose inlet is connected to the outlet of condenser (3), and whose outlet is connected to the inlet of suction cooling heat exchanger (5); The compressor (4) has its inlet connected to the suction cooling heat exchanger (5) and its outlet connected to the condenser (3) inlet.

6. The low temperature heat transfer oil based suction cooling device according to claim 5, wherein, Also includes: A throttling device (2) is connected between the inlet of the evaporator (1) and the outlet of the condenser (3).

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