阅读说明：本技术 热湿交变环境控制的装置以及热湿交变试验箱 (Device for controlling heat-humidity alternating environment and heat-humidity alternating test box ) 是由 胡斌 周默 王如竹 周贤 于 2019-11-22 设计创作，主要内容包括：本发明提供了一种热湿交变环境控制的装置以及热湿交变试验箱,包括：高温级压缩循环部分、低温级压缩循环部分、冷量转换器和超声波加湿器,冷量转换器连接在高温级压缩循环部分和低温级压缩循环部分之间；其中,低温级压缩循环部分中采用微通道蒸发器进行蒸发吸热,超声波加湿器采用高频震荡产生水雾对测试空间进行加湿。本发明通过使用微通道换热器替代管翅片管蒸发器,节省风道内占用体积,在同等制冷需求设计下结构更加紧凑,测试区域内可利用空间更大,气流组织更加均匀；换热器表面固体干燥剂涂层可以储存一部分水蒸气,在加湿过程中放出节省部分能耗；超声波加湿器加湿过程功率小、耗水量少、控制精度高,可以高达到节能减排的作用。(The invention provides a device for controlling a heat-humidity alternating environment and a heat-humidity alternating test box, comprising: the system comprises a high-temperature stage compression circulation part, a low-temperature stage compression circulation part, a cold energy converter and an ultrasonic humidifier, wherein the cold energy converter is connected between the high-temperature stage compression circulation part and the low-temperature stage compression circulation part; wherein, adopt the microchannel evaporator to evaporate the heat absorption in the low temperature level compression circulation part, the ultrasonic humidifier adopts high frequency oscillation to produce water smoke and carries out the humidification to the test space. According to the invention, the microchannel heat exchanger is used for replacing a tube finned tube evaporator, so that the occupied volume in an air channel is saved, the structure is more compact under the design of the same refrigeration requirement, the available space in a test area is larger, and the air flow organization is more uniform; the solid desiccant coating on the surface of the heat exchanger can store a part of water vapor, and the water vapor is discharged in the humidifying process to save a part of energy consumption; the ultrasonic humidifier has the advantages of low power, low water consumption and high control precision in the humidification process, and can achieve the effects of energy conservation and emission reduction.)

1. An apparatus for hot wet alternating environmental control, comprising: the device comprises a high-temperature stage compression circulation part, a low-temperature stage compression circulation part, a cold energy converter (4) and an ultrasonic humidifier (8), wherein the cold energy converter (4) is connected between the high-temperature stage compression circulation part and the low-temperature stage compression circulation part;

wherein, a microchannel evaporator (7) is adopted in the low-temperature stage compression circulation part for evaporation and heat absorption;

the ultrasonic humidifier (8) generates water mist by adopting high-frequency oscillation to humidify the test space.

2. The hme control device of claim 1, wherein the microchannel evaporator (7) has a surface coated with a solid desiccant coating.

3. Device for thermo-hygrothermal environment control according to claim 2, characterized in that the cold converter (4) has a high-temperature stage input, a high-temperature stage output, a low-temperature stage input and a low-temperature stage output.

4. The hme control device of claim 3, wherein the high temperature stage compression cycle portion includes: a first compressor (1), a condenser (2) and a first throttle valve (3);

the input of first compressor (1) is connected the high temperature stage delivery outlet, the output of first compressor (1) with the input of condenser (2) is connected, the output of condenser (2) passes through first choke valve (3) with the high temperature stage input port is connected.

5. The hme control device of claim 3, wherein the low temperature stage compression cycle portion includes: a second throttle valve (6), the microchannel evaporator (7) and a second compressor (5);

the input end of the micro-channel evaporator (7) is connected with the low-temperature stage output port through the second throttling valve (6), the input end of the second compressor (5) is connected with the output end of the micro-channel evaporator (7), and the output end of the second compressor (5) is connected with the low-temperature stage input port.

6. The hme environmental control apparatus of claim 5, wherein the test space region exchanging heat with the low temperature stage compression cycle includes: an air duct and an ultrasonic humidifier (8);

the ultrasonic humidifier (8) and the micro-channel evaporator (7) are arranged in the air duct, and air in the air duct is driven by the fan part of the ultrasonic humidifier (8) and is output after the micro-channel evaporator (7) is cooled and dehumidified.

7. A device for humid and hot air control according to claim 6, characterized in that the microchannel evaporator (7) fills the cross section of the air channel.

8. The system according to claim 1, wherein a refrigerant flows through each of the high temperature stage compression cycle portion and the low temperature stage compression cycle portion.

9. Device for thermo-hygro-alternating climate control according to claim 1, characterized in that the cold converter (4) comprises a plate-type intermediate heat exchanger.

10. A thermal humidity alternating test chamber comprising the apparatus for thermal humidity alternating environment control of any one of claims 1 to 9.

Technical Field

The invention relates to the field of refrigeration systems, in particular to a device for controlling a heat-humidity alternating environment and a heat-humidity alternating test box.

Background

The development of the Chinese environmental test technology is late compared with that of foreign countries, the overall technical level has a certain gap compared with that of foreign countries, but the market demand of the domestic environmental test equipment is huge, the GDP is used as a large entity economy country with continuously increasing GDP every year, and the environment simulation technology is required by all aspects as the basis of product reliability testing no matter food processing, logistics transportation or electronic material military equipment. Under the same test requirements, high-end environmental test equipment imported from abroad can often more motivate consumers, so that the independent research and development of multifunctional advanced precise environmental test equipment is urgent.

Most test chambers in the market at present adopt a compression type refrigeration mode to cool, and in order to better simulate extreme environments, people develop several advanced refrigeration/heat pump technologies to achieve the aim and improve the performance, such as multi-stage compression cycle, cascade cycle, compound system and the like. Among them, in the field of test chamber equipment, the cascade refrigeration cycle has gained wide attention and application, that is, it is formed by combining two single-stage compression cycles operating independently through an intermediate heat exchanger. The low-temperature cycle absorbs heat from the box test space through the evaporator, then the refrigerant transferring heat to the high-temperature cycle through the cascade intermediate heat exchanger is evaporated in the intermediate heat exchanger, and the refrigerant discharges heat to the natural environment in the condenser after being compressed. Cascade refrigeration systems have been demonstrated to possess the ability to significantly improve coefficient of performance and cooling space in the field of construction industry applications, as well as provide cooling capability over a wide range in many areas such as food, beverage and test equipment.

Patent document CN 105758048B discloses a cascade refrigeration system with variable flow single working medium parallel condenser and evaporator. The evaporator is used as the tail end of a cascade refrigeration system which is placed in a test environment air channel to provide cold, the structural design of the air channel is directly related, the traditional finned tube evaporator is large in occupied size, general in heat exchange efficiency and serious in heat conduction delay condition, and the uniformity of a test space velocity field and a temperature field is affected. In the aspect of humidity control, the surface of the evaporator is mainly used for condensation and dehumidification, impurities in condensed water are more, the service life of the humidifier is influenced when the water tank is repeatedly recycled, and the water is directly discharged to cause waste and frequent water adding to the water tank.

Disclosure of Invention

In view of the defects in the prior art, the invention aims to provide a device for controlling a heat-humidity alternating environment and a heat-humidity alternating test box.

The invention provides a device for controlling a heat-humidity alternating environment, which comprises: the device comprises a high-temperature stage compression circulation part, a low-temperature stage compression circulation part, a cold converter 4 and an ultrasonic humidifier 8, wherein the cold converter 4 is connected between the high-temperature stage compression circulation part and the low-temperature stage compression circulation part;

wherein, a microchannel evaporator 7 is adopted in the low-temperature stage compression circulation part for evaporation and heat absorption;

the ultrasonic humidifier 8 generates water mist by adopting high-frequency oscillation to humidify the test space.

Preferably, the surface of the microchannel evaporator 7 is coated with a solid moisture storage desiccant coating.

Preferably, the cold converter 4 comprises a high-temperature stage input port, a high-temperature stage output port, a low-temperature stage input port and a low-temperature stage output port.

Preferably, the high temperature stage compression cycle portion comprises: a first compressor 1, a condenser 2 and a first throttle valve 3;

the input of first compressor 1 is connected the high temperature stage delivery outlet, the output of first compressor 1 with the input of condenser 2 is connected, the output of condenser 2 passes through first choke valve 3 with the high temperature stage input port is connected.

Preferably, the low temperature stage compression cycle portion comprises: a second throttle valve 6, the microchannel evaporator 7 and a second compressor 5;

the input end of the micro-channel evaporator 7 is connected with the low-temperature stage output port through the second throttle valve 6, the input end of the second compressor 5 is connected with the output end of the micro-channel evaporator 7, and the output end of the second compressor 5 is connected with the low-temperature stage input port.

Preferably, the test space region that exchanges heat with the low-temperature stage compression cycle includes: an air duct and an ultrasonic humidifier 8;

the ultrasonic humidifier 8 with the microchannel evaporator 7 set up in the wind channel, the air in the wind channel passes through 8 fan parts drive of ultrasonic humidifier, through the output after microchannel evaporator 7 cools down the dehumidification.

Preferably, the microchannel evaporator 7 fills the cross section of the air channel.

Preferably, a refrigerant flows through each of the high-temperature stage compression cycle portion and the low-temperature stage compression cycle portion.

Preferably, the cold converter 4 comprises a plate intermediate heat exchanger.

The invention provides a heat and humidity alternating test chamber which comprises the device for controlling the heat and humidity alternating environment.

Compared with the prior art, the invention has the following beneficial effects:

1. according to the invention, the microchannel heat exchanger is used for replacing a tube finned tube evaporator, so that the occupied volume in an air channel is saved, the structure is more compact under the design of the same refrigeration requirement, the available space in a test area is larger, and the air flow organization is more uniform.

2. The micro-channel heat exchanger used by the invention has higher heat exchange efficiency, improves the system performance, has faster temperature response, has the cooling rate of 3-5K/min, and can ensure that the uniformity of the whole temperature field of a test space can reach +/-0.5K.

3. The evaporator coating used by the invention can effectively adsorb moisture, and a part of water vapor in the air is adsorbed in the coating when the temperature is reduced and the humidity is removed, so that the power consumption of the compressor when the part is condensed and the humidity is removed is reduced; when the temperature is raised and the humidity is increased, the desorption of the part of the water vapor is released to the space, and the power consumption of the part of the humidifier is reduced. The coating is used for adsorption/desorption, so that the cyclic utilization of water vapor is realized, the overall energy consumption of the system is reduced, and the effects of energy conservation and emission reduction are realized.

4. Compared with an electrode type electric heating humidification mode, the ultrasonic humidifier generates water mist by utilizing high-frequency oscillation to humidify a test space, and the humidifying process is low in power consumption, low in water consumption and high in control precision.

Drawings

Other features, objects and advantages of the invention will become more apparent upon reading of the detailed description of non-limiting embodiments with reference to the following drawings:

FIG. 1 is a schematic structural diagram of the present invention.

Detailed Description

The present invention will be described in detail with reference to specific examples. The following examples will assist those skilled in the art in further understanding the invention, but are not intended to limit the invention in any way. It should be noted that it would be obvious to those skilled in the art that various changes and modifications can be made without departing from the spirit of the invention. All falling within the scope of the present invention.

As shown in fig. 1, the present invention provides a device for controlling an alternating humidity and heat environment, comprising: the device comprises a high-temperature stage compression circulation part, a low-temperature stage compression circulation part, a cold energy converter 4 and an ultrasonic humidifier 8, wherein the cold energy converter 4 is connected between the high-temperature stage compression circulation part and the low-temperature stage compression circulation part. The surface of the microchannel evaporator 7 is coated with a solid moisture storage desiccant coating. The ultrasonic humidifier utilizes high-frequency oscillation to generate water mist to humidify the test space. The high-temperature stage compression cycle portion and the low-temperature stage compression cycle portion in the present invention refer to a relatively high temperature and a relatively low temperature between the two portions, and do not refer to a specific temperature range being a high temperature or a low temperature.

The cold quantity converter 4 comprises a high-temperature level input port, a high-temperature level output port, a low-temperature level input port and a low-temperature level output port. The high temperature stage compression cycle portion includes: a first compressor 1, a condenser 2 and a first throttle valve 3; the input end of the first compressor 1 is connected with the high-temperature stage output port, the output end of the first compressor 1 is connected with the input end of the condenser 2, and the output end of the condenser 2 is connected with the high-temperature stage input port through the first throttle valve 3. The low temperature stage compression cycle portion includes: a second throttle valve 6, a microchannel evaporator 7 and a second compressor 5; the input end of the micro-channel evaporator 7 is connected with the low-temperature stage output port through the second throttle valve 6, the input end of the second compressor 5 is connected with the output end of the micro-channel evaporator 7, and the output end of the second compressor 5 is connected with the low-temperature stage input port. The test space region that exchanges heat with the low temperature stage compression cycle includes: an air duct and an ultrasonic humidifier 8; the ultrasonic humidifier 8 and the micro-channel evaporator 7 are arranged in the air duct, and air in the air duct is driven by the fan part of the ultrasonic humidifier 8 and is output after being cooled and dehumidified by the micro-channel evaporator 7.

In the high-temperature stage compression cycle, a refrigerant is compressed by a first compressor 1 to become a high-temperature high-pressure gas state and is discharged into a condenser 2, the heat released in the condensation process of the refrigerant is dissipated to the environment, then the refrigerant is decompressed and expanded by a first throttle valve 3 and finally enters a cold converter 4 to be evaporated, and the heat exchange is carried out with the low-temperature stage refrigerant in the process; the low-temperature-level refrigerant is condensed and exchanges heat in the cold energy converter 4, enters the second throttling valve 6 to be expanded and decompressed, then enters the micro-channel heat exchanger 7 to be evaporated and absorb heat, heat and adsorption heat in air are taken away, the refrigerant finally returns to the second compressor 5, and the air after being cooled and dehumidified is circularly sent to the test space by the fan in the air duct. In the present embodiment, the cold energy converter 4 is a plate-type intermediate heat exchanger.

In order to be able to provide sufficient cooling load, the microchannel evaporator 7 should be dimensioned according to the maximum refrigeration requirement; in order to avoid insufficient heat exchange caused by short-circuit wind, the microchannel evaporator 7 should fill the cross section of the air channel as much as possible and fill the non-heat exchange area to avoid air leakage; in order to avoid affecting the heat exchange effect and reducing the wind resistance, the solid moisture storage desiccant coating process should avoid plugging the gaps between the spacers of the microchannel evaporator 7.

The device for controlling the heat-humidity alternating environment can be applied to a heat-humidity alternating test box.

The micro-channel evaporator is used for replacing the traditional finned tube evaporator, the structure of the micro-channel evaporator is more compact under the condition of the same refrigerating capacity, the space utilization rate is high, the occupied volume in an air duct can be saved by more than 40%, and the abundant air duct space is favorable for the optimal design of airflow organization and is convenient for possible later maintenance work.

The micro-channel evaporator utilizes a large-scale micro-channel enhanced heat transfer principle, the convective heat transfer coefficient can be improved by 50% -100% when the equivalent diameter of a flow channel is about 1mm, the uniformity of a temperature field is better, the higher energy efficiency standard can be met while the stability of a test space environment is maintained, the system performance is effectively improved, the overall energy consumption of the system is reduced, and the pressure resistance, durability and reliability are high.

The moisture storage desiccant coating sprayed on the surface of the microchannel evaporator has the advantages that in the continuous dehumidification process, the average dehumidification amount can reach more than 5g/kg of dry air, so that water vapor in the air can be effectively adsorbed, adsorption heat can be taken away through a refrigerant flowing in a pipeline, and irreversible loss in the dehumidification process is reduced; during the heating and humidifying process of the system, water vapor in the coating can be desorbed into air, so that a part of humidifying capacity is provided and the energy consumption of the humidifier is saved.

In the humidifying process of the ultrasonic humidifier, the test space is humidified by using water mist generated by high-frequency oscillation, and the humidifying process is low in power consumption, low in water consumption and high in control precision.

In the description of the present application, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience in describing the present application and simplifying the description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present application.

The foregoing description of specific embodiments of the present invention has been presented. It is to be understood that the present invention is not limited to the specific embodiments described above, and that various changes or modifications may be made by one skilled in the art within the scope of the appended claims without departing from the spirit of the invention. The embodiments and features of the embodiments of the present application may be combined with each other arbitrarily without conflict.