Triangular circulation heat management system and method for eliminating peculiar smell of vehicle air conditioner

Abstract

The invention provides a triangular circulation heat management system and method for eliminating peculiar smell of a vehicle air conditioner. The triangular circulation heat management system comprises a host system, a condensation system and a compression system. The main machine system comprises an air conditioner main machine with an evaporator, and the evaporator evaporates condensate water in the main machine system into water vapor. The condensing system comprises a condenser; one end of the condensing system is communicated with the host system through a pipeline; the compression system comprises a compressor, the compression system communicates with the main machine system and the condensation system through pipelines, and the compressor provides high-temperature and high-pressure refrigerants for the evaporator. Wherein a first electronic expansion valve is arranged between the main machine system and the condensation system, a second electronic expansion valve is arranged between the main machine system and the compression system, and a gas-liquid separation device is arranged between the main machine system and the compression system. The triangular circulation heat management system and method for eliminating the peculiar smell of the vehicle air conditioner can solve the problem that in the prior art, peculiar smell is generated when the air conditioner is started.

Description

Technical Field

[0001] The invention relates to an automobile thermal management system, in particular to a triangular cycle thermal management system and method for eliminating peculiar smell of vehicle air conditioner. Background Art

[0002] At present, when the car air conditioner is in cooling mode, the air temperature suddenly drops below the dew point temperature. Condensation water is easily precipitated in the air and adheres to the surface of the evaporator or drips into the air-conditioning box, causing the air-conditioning box to be in a humid environment for a long time, which is easy to cause mold and is accompanied by a sour smell. When the refrigerant temperature is around 0°C, the microorganisms in the air will be frozen on the surface of the evaporator. When the control strategy limits the compressor speed, the user actively exits or other factors cause the air-conditioning system to shut down, the microorganisms will be thawed and blown out with the air-conditioning wind. The sour smell causes discomfort to the user.

[0003] Existing technical solutions generally place active adsorbent materials inside the air conditioner main unit to absorb moisture inside the air conditioner main unit, but this method can only absorb some odors, and the adsorbent material needs to be replaced regularly. The operation is cumbersome and the effect of solving odor is limited. Summary of the invention

[0004] In view of the shortcomings of the prior art mentioned above, the purpose of the present invention is to provide a triangular cycle thermal management system and method for eliminating vehicle air-conditioning odor, which is used to solve the problem of odor generated by turning on the air conditioner in the prior art. The triangular cycle thermal management system for eliminating vehicle air-conditioning odor controls the pressure value of the refrigerant through two electronic expansion valves to meet the working requirements of the evaporator and the compressor. At the same time, a gas-liquid separator is provided at the suction end of the compressor to increase the suction dryness.

[0005] The present invention provides a triangular cycle thermal management system and method for eliminating odor of vehicle air conditioner, comprising:

[0006] A host system, the host system comprising an air conditioning host including an evaporator, the evaporator evaporating condensed water in the host system into water vapor;

[0007] A condensation system, wherein the condensation system comprises a condenser, and one end of the condensation system is connected to the host system through a pipeline;

[0008] A compression system, the compression system comprising a compressor, the compression system being connected to the host system and the condensing system through pipelines, respectively, and the compressor providing a high-temperature and high-pressure refrigerant to the evaporator;

[0009] Among them, a first electronic expansion valve is provided between the host system and the condensation system, a second electronic expansion valve is provided between the host system and the compression system, and a gas-liquid separation device is provided between the host system and the compression system.

[0010] In one embodiment of the present invention, the refrigerant released by the compression system flows through the condensing system, the host system, the gas-liquid separator in sequence through the pipeline, and finally flows back to the compression system.

[0011] In one embodiment of the present invention, the evaporator evaporates condensed water using the refrigerant provided by the compressor.

[0012] In one embodiment of the present invention, the refrigerant does not exchange heat with the condenser.

[0013] In one embodiment of the present invention, the pressure value of the refrigerant flowing through the first electronic expansion valve is controlled by adjusting the opening of the first electronic expansion valve, so that the saturation temperature of the refrigerant at this pressure value is 15° C. higher than the temperature in the host system.

[0014] In one embodiment of the present invention, the pressure value of the refrigerant flowing through the second electronic expansion valve is controlled by adjusting the opening degree of the second electronic expansion valve, so that the pressure value of the refrigerant is reduced to a suction pressure value that meets the requirements of the compressor.

[0015] In one embodiment of the present invention, the gas-liquid separator can improve the dryness of the refrigerant.

[0016] The present invention also provides a triangular cycle thermal management method for solving the problem of odor when turning on an air conditioner, comprising:

[0017] S1: The compressor releases refrigerant, which flows into the condenser;

[0018] S2: the refrigerant flows from the condenser to the evaporator through the first electronic expansion valve;

[0019] S3: the refrigerant flows from the host system through the second electronic expansion valve to the gas-liquid separator;

[0020] S4: The refrigerant flows from the gas-liquid separator to the compressor, and the cycle ends.

[0021] In one embodiment of the present invention, in S2, when the refrigerant flows through the first expansion valve, the pressure value of the refrigerant is adjusted by adjusting the opening of the first expansion valve, so that the saturation temperature corresponding to the refrigerant at this pressure value is 15°C higher than the temperature in the host system, and the evaporator evaporates the condensed water on the surface of the evaporator under the action of the refrigerant.

[0022] In one embodiment of the present invention, in S3, when the refrigerant flows through the second expansion valve, the pressure value of the refrigerant is adjusted by adjusting the opening of the second expansion valve, so that the pressure value of the refrigerant is reduced to a suction pressure value that meets the requirements of the compressor, and when the refrigerant enters the gas-liquid separator, the gas-liquid separator increases the dryness of the refrigerant.

[0023] The triangular cycle thermal management system and method for eliminating vehicle air-conditioning odor of the present invention does not rely on external heat-absorbing elements, uses a triangular cycle to ensure stable operation of the system, and uses the evaporator as a condenser to generate heat itself, and combines with a blower to supply air to remove moisture from the evaporator core and surrounding sponge seals, thereby improving the drying effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for describing the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying creative work.

[0025] Figure 1 It is a schematic diagram of the working principle of the thermal management system of the present invention;

[0026] Figure 2 A schematic diagram showing the structure of a thermal management system of the present invention;

[0027] Figure 3 The figure is a flow chart showing the steps of the thermal management method of the present invention. DETAILED DESCRIPTION

[0028] The following describes the embodiments of the present invention through specific examples, and those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present invention.

[0029] It should be noted that, in the absence of conflict, the features in the following examples and embodiments can be combined with each other. It should also be understood that the terms used in the examples of the present invention are intended to describe specific embodiments rather than to limit the scope of the present invention. The test methods in the following examples that do not specify specific conditions are usually carried out under conventional conditions or under conditions recommended by the manufacturers.

[0030] See also Figures 1 to 3. It should be noted that the structures, proportions, sizes, etc. illustrated in the drawings in this specification are only used to match the contents disclosed in the specification for people familiar with this technology to understand and read, and are not used to limit the limiting conditions for the implementation of the present invention, so they have no substantial technical significance. Any modification of the structure, change in the proportional relationship, or adjustment of the size should still fall within the scope of the technical content disclosed by the present invention without affecting the effects and purposes that can be achieved by the present invention. At the same time, the terms such as "upper", "lower", "left", "right", "middle" and "one" quoted in this specification are only for the convenience of description, and are not used to limit the scope of the implementation of the present invention. Changes or adjustments in their relative relationships should also be regarded as the scope of the implementation of the present invention without substantially changing the technical content.

[0031] The present invention provides a triangular cycle thermal management system for eliminating odors from vehicle air conditioners, which can be used to solve the problem of odors generated when turning on air conditioners in the prior art. Specifically, the triangular cycle thermal management system for eliminating odors from vehicle air conditioners of the present invention includes a host system, a condensation system, and a compression system. The host system includes an air conditioner host including an evaporator, and the evaporator evaporates the condensed water in the host system into water vapor; the condensation system includes a condenser, and one end of the condensation system is connected to the host system through a pipeline; the compression system includes a compressor, and the compression system is connected to the host system and the condensation system through pipelines, and the compressor provides high-temperature and high-pressure refrigerant to the evaporator; wherein a first electronic expansion valve is provided between the host system and the condensation system, a second electronic expansion valve is provided between the host system and the compression system, and a gas-liquid separation device is provided between the host system and the compression system.

[0032] At present, when the air temperature of automobile air conditioners drops below the dew point temperature in the cooling mode, condensed water is easily precipitated in the air, attached to the surface of the evaporator, or dripped into the air conditioner box, causing the air conditioner box to be in a humid environment for a long time, which is easy to cause mold and accompanied by a sour smell. When the refrigerant temperature is around 0°C, the microorganisms in the air will be frozen on the surface of the evaporator. When the control strategy limits the compressor speed, the user actively exits or other factors cause the air conditioner system to shut down, the microorganisms are thawed and blown out with the air conditioning wind, and the sour smell causes discomfort to the user. The existing implementation scheme is to install an activated carbon filter element that absorbs odors in front of the evaporator, but this scheme can only absorb part of the odor and has a very limited effect on solving the odor problem. The present invention uses refrigerant to heat the evaporator surface, dry the moisture in the evaporator and the air conditioner box, avoid the humid environment in the air conditioner box, accelerate the circulation of air in the host system through the blower, improve the drying effect, thereby preventing mold growth and solving the problem of odor when turning on the air conditioner. At the same time, it does not rely on external heat-absorbing elements, and uses a triangular cycle to ensure stable operation of the system. During the drying process, the operation of 1 to 3 types of thermal management system components can be reduced. For example, there is no need for fans and water pumps to run, which may cause NVH problems. There is no need to absorb heat from the battery to prevent the battery core from being too low. In this solution, the evaporator is used as a condenser, and its own heat is used. In combination with the blower, it can not only remove moisture from the air duct and shell of the air conditioner, but also remove moisture from the evaporator core and surrounding sponge seals. The existing solution of using PTC or internal condenser to dry moisture can only dry part of the air duct of the air conditioner, and cannot remove water from the evaporator core. The drying effect of the present invention is more thorough.

[0033] like Figure 1 and 2As shown, a triangular cycle thermal management system for eliminating odor in vehicle air conditioners provided by the present invention includes a host system, a condensation system and a compression system. Among them, the host system, the condensation system and the compression system are connected by pipelines respectively, and a first electronic expansion valve is provided on the pipeline between the host system and the condensation system, and a second electronic expansion valve is provided on the pipeline between the host system and the compression system. The first electronic expansion valve and the second electronic expansion valve are in a normally open state, and the pressure value of the refrigerant passing through can be adjusted by controlling the opening of the two electronic expansion valves. The host system is an air conditioner host including an evaporator, and the compressor can work on the refrigerant to increase the temperature, heat the evaporator core, remove the moisture on the surface of the evaporator, evaporate the condensed water on the inner wall of the air conditioner host shell and on the evaporator core, and form water vapor, which can be combined with the opening of the blower to supply air, so as to achieve a good drying effect. The air conditioner host also includes a blower. When the blower is turned on, the gas circulation speed in the host system can be accelerated, and the water vapor in the pipeline can be transported to the vehicle cabin. The condensation system includes a condenser, which provides a condensation effect under refrigeration conditions and can condense the water vapor entering the condensation system into liquid water. In the present invention, there is no restriction on the type of condenser, which can be an air source condenser or a water condenser. The compression system includes a compressor and an inhaled air dryness detection device, and the inhaled air dryness detection device is installed in the compressor. The compressor provides heat to the evaporator and provides the refrigerant flow required by the refrigerant pipeline.

[0034] Furthermore, when the thermal management system is working, the suction dryness detector in the compressor detects the suction dryness of the compressor in real time. The suction dryness detector is preset with a suction dryness threshold. When the suction dryness is too low, it may cause wet stroke and liquid hammer, etc., and may also cause problems such as low oil temperature and high viscosity, affecting the lubrication performance of the compressor. Therefore, in the present invention, a gas-liquid separator is set at the suction end of the compressor. When the suction dryness detection device detects that the suction dryness is lower than the preset suction dryness threshold, the gas-liquid separator works until the suction dryness meets the working requirements of the compressor, increasing the outlet dryness at the second electronic expansion valve. At the same time, in the present invention, the pressure value of the refrigerant passing through can be adjusted by adjusting the opening of the first expansion valve and the second expansion valve. When the refrigerant flows from the condenser to the host system, it is intercepted by the first expansion valve, and the refrigerant reaches a specified pressure value. At this pressure value, the corresponding saturation temperature is 10-20°C higher than the temperature in the host system. The surface of the evaporator is heated to dry the condensed water, and the blower blows air to accelerate the evaporation efficiency of the evaporator. After passing through the host system, the refrigerant is intercepted by the second electronic expansion valve, and the pressure is reduced to the suction pressure value that meets the compressor requirements by adjusting the opening of the second expansion valve. After that, it enters the gas-liquid separator to increase the dryness, and finally enters the compressor suction port to complete the refrigerant cycle.

[0035] In one embodiment of the present invention, when the evaporator stops the cooling function, condensed water will be hung on the surface of the evaporator. At this time, the compressor is turned on, and the high-temperature and high-pressure refrigerant enters the condenser. This condenser can be an air-cooled condenser or a water-cooled condenser. When the condenser is an air-cooled condenser, the condensing fan is not turned on at this time. The vehicle model with AGS can close the front air intake, and the condenser has no heat dissipation; if it is a water-cooled condenser, the condensing water pump is turned off. The refrigerant only passes through the condenser without any heat exchange. After that, the refrigerant is intercepted by EXV1, and the refrigerant pressure entering the evaporator is controlled so that the corresponding saturation temperature under this pressure is 10 to 20°C higher than the temperature in the cabin. The system releases heat. At this time, the evaporator acts as a condenser. The compressor provides heat to the evaporator by delivering refrigerant to the evaporator. The heat output by the evaporator acts on the side wall of the air-conditioning main unit and the inner core of the evaporator to dry the condensed water. The condensed water on the surface of the air-conditioning main unit and the inner core of the evaporator evaporates to form water vapor under the action of heat, and the water vapor circulates rapidly in the main unit system under the action of the blower. After passing through the evaporator, the saturated / supercooled refrigerant is intercepted by EXV2 and enters the two-phase zone. At the same time, the pressure is reduced to the suction pressure value that meets the requirements of the compressor, and then enters the gas filter to increase the dryness, and finally enters the compressor suction port to complete the cycle. Because this process does not include the evaporation process, it presents a triangular cycle when drawn in the pressure-enthalpy diagram. The refrigerant flows from the compressor through the condensation system, the first electronic expansion valve, the host system, the second electronic expansion valve, and the gas-liquid separator in sequence, and finally flows back to the compressor. The refrigerant does not exchange heat when flowing through the condensation system. When flowing through the first electronic expansion valve and the second electronic expansion valve, the pressure value changes according to demand. When flowing through the host system, heat exchange occurs to provide heat to the evaporator, and the dryness is increased when flowing through the gas-liquid separator.

[0036] The present invention also provides a triangular cycle thermal management method for solving the problem of odor when turning on the air conditioner, comprising: S1: the compressor releases refrigerant, and the refrigerant flows into the condenser; S2: the refrigerant flows from the condenser to the evaporator through the first electronic expansion valve; S3: the refrigerant flows from the host system to the gas-liquid separator through the second electronic expansion valve; S4: the refrigerant flows from the gas-liquid separator to the compressor, and the cycle ends.

[0037] like Figure 1 and 3As shown, the evaporator is arranged in the air-conditioning main unit, and the air-conditioning main unit is connected to the compressor and the condenser through pipelines respectively. A temperature sensor is also arranged on the pipeline between the compression system and the condensation system. In S2, when the refrigerant flows through the first expansion valve, the pressure value of the refrigerant is adjusted by adjusting the opening of the first expansion valve, so that the saturation temperature corresponding to the refrigerant at this pressure value is 15°C higher than the temperature in the main unit system, and the evaporator evaporates the condensed water on the surface of the evaporator under the action of the refrigerant. In S3, when the refrigerant flows through the second expansion valve, the pressure value of the refrigerant is adjusted by adjusting the opening of the second expansion valve, so that the pressure value of the refrigerant is reduced to the suction pressure value that meets the requirements of the compressor, and when the refrigerant enters the gas-liquid separator, the gas-liquid separator increases the dryness of the refrigerant.

[0038] The present invention proposes a triangular cycle thermal management system and method for eliminating odor in vehicle air conditioning. The pressure value of the refrigerant is controlled by two electronic expansion valves to meet the working requirements of the evaporator and the compressor. At the same time, a gas-liquid separator that can improve the dryness of the suction air is provided at the suction end of the compressor.

[0039] Therefore, the problem of odor in the air conditioner can be solved by a triangular cycle thermal management system and method for eliminating odor in a vehicle air conditioner according to the present invention.

[0040] The above embodiments are merely illustrative of the principles and effects of the present invention, and are not intended to limit the present invention. Anyone familiar with the art may modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by a person of ordinary skill in the art without departing from the spirit and technical concept disclosed by the present invention shall still be covered by the claims of the present invention.

Claims

1. A triangular cycle thermal management system for eliminating odor in vehicle air conditioners, characterized in that: include: A host system, the host system comprising an air-conditioning host including an evaporator; A condensation system, wherein the condensation system comprises a condenser, and one end of the condensation system is connected to the host system through a pipeline; A compression system, the compression system comprising a compressor, the compression system being connected to the host system and the condensing system through pipelines respectively; Wherein, a first electronic expansion valve is provided between the host system and the condensing system, a second electronic expansion valve is provided between the host system and the compression system, and a gas-liquid separation device is provided between the second electronic expansion valve and the compression system; After the evaporator stops the refrigeration function, the compressor provides the evaporator with a preset pressure of refrigerant through the first electronic expansion valve, so that the evaporator evaporates the condensed water in the host system into water vapor.

2. The triangular cycle thermal management system for eliminating odor in vehicle air conditioners according to claim 1 is characterized in that: The refrigerant released by the compression system flows through the condensing system, the host system, and the gas-liquid separator in sequence through the pipeline, and finally flows back to the compression system.

3. The triangular cycle thermal management system for eliminating vehicle air-conditioning odor according to claim 1 is characterized in that: The evaporator evaporates condensed water using the refrigerant provided by the compressor.

4. The triangular cycle thermal management system for eliminating vehicle air-conditioning odor according to claim 3 is characterized in that: While the evaporator is evaporating condensed water using the refrigerant provided by the compressor, no heat exchange occurs between the refrigerant and the condenser.

5. The triangular cycle thermal management system for eliminating odor in vehicle air conditioners according to claim 4 is characterized in that: The pressure of the refrigerant flowing through the first electronic expansion valve is controlled to reach the preset pressure value by adjusting the opening of the first electronic expansion valve, so that the saturation temperature of the refrigerant at the preset pressure value is higher than the temperature in the host system by a preset temperature difference.

6. The triangular cycle thermal management system for eliminating vehicle air-conditioning odor according to claim 5, characterized in that: The pressure value of the refrigerant flowing through the second electronic expansion valve is controlled by adjusting the opening degree of the second electronic expansion valve, so that the pressure value of the refrigerant is reduced to a suction pressure value that meets the requirements of the compressor.

7. The triangular cycle thermal management system for eliminating vehicle air-conditioning odor according to claim 6, characterized in that: The host system also includes a blower, which works while the evaporator is evaporating condensed water, and fully dries the moisture attached to the outer wall of the evaporator and the inner wall of the air-conditioning host.

8. A method for using the triangular cycle thermal management system according to any one of claims 1 to 7, characterized in that: include: S1: When the evaporator of the air-conditioning host system stops the cooling function, the compressor releases the refrigerant, and the refrigerant flows into the condenser; S2: the refrigerant flows from the condenser to the evaporator through the first electronic expansion valve at a preset pressure; S3: The refrigerant flows from the air conditioning host system to the gas-liquid separator through the second electronic expansion valve; S4: The refrigerant flows from the gas-liquid separator to the compressor, and the cycle ends.

9. The method according to claim 8, characterized in that In S2, when the refrigerant flows through the first expansion valve, the pressure value of the refrigerant is adjusted to reach the preset pressure by adjusting the opening of the first expansion valve, so that the saturation temperature corresponding to the refrigerant at the preset pressure is higher than the temperature in the air-conditioning host system by a preset temperature difference, and the evaporator evaporates the condensed water on the surface of the evaporator under the action of the refrigerant.

10. The method according to claim 7, characterized in that In S3, when the refrigerant flows through the second expansion valve, the pressure value of the refrigerant is adjusted by adjusting the opening of the second expansion valve, so that the pressure value of the refrigerant is reduced to a suction pressure value that meets the requirement of the compressor.

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