KR102518365B1 - Thermohygrostat chamber for energy-saving constant temperature - Google Patents

Abstract

The present invention relates to a thermo-hygrostat chamber for saving energy, which enables effective temperature operation control. To this end, the thermo-hygrostat chamber for saving energy comprises: a housing; a test room which is formed inside the housing; an air circulation path which is formed on a rear surface of the test room to enable air in the test room to circulate; a fan which is disposed of in the air circulation path to circulate inner air in the test room; a temperature adjustment means which has an evaporator that raises or lowers the temperature of air blown by the fan; and a humidistat which is installed in the air circulation path to constantly adjust inner humidity of the test room. The temperature adjustment means comprises: an evaporator which is disposed of in the air circulation path to raise or lower the temperature of air circulated in the test room; a compressor which receives low-pressure low-temperature gas or low-pressure middle-temperature gas emitted from the evaporator to be emitted as high-pressure high-temperature gas; and a condenser which receives the high-pressure high-temperature gas emitted from the compressor to be emitted as high-pressure room-temperature liquid. The housing is further provided with a recovery tank for collecting condensate water generated on the surface of the evaporator during a dehumidification operation. The evaporator is configured to precisely operate and control the high-pressure room-temperature liquid emitted from the condenser and the amount of emission of the high-pressure high-temperature gas emitted from the compressor to constantly maintain the temperature of the circulated air within a temperature range of -20℃ to 60℃.

Description

Energy-saving constant temperature and humidity chamber {THERMOHYGROSTAT CHAMBER FOR ENERGY-SAVING CONSTANT TEMPERATURE}

The present invention relates to an energy-saving constant temperature and humidity chamber, and more particularly, by arranging an evaporator in an air circulation path that is distributed with a test room so that the temperature of circulated air is constant within a maximum range of 60 ° C to -20 ° C without a separate heating means. The present invention relates to an energy-saving constant temperature and humidity chamber which can save energy by maintaining constant temperature and maintain a constant humidity in a test room by providing a humidity control unit in the air circulation path.

The thermo-hygrostat is a device that maintains the current temperature and humidity (hereinafter referred to as "temperature and humidity") of the indoor space at a set value. It is installed and used in places sensitive to temperature and humidity, such as food processing rooms and computer rooms, as well as R&D in high-tech industries such as machine assembly equipment.

A typical thermo-hygrostat consists of a cooler that supplies cold air, a fan that supplies warm air, and a humidifier that maintains indoor humidity. The generated cool air is supplied to the indoor space through a blower fan.

The hot air blower supplies the warm air generated from the heating wire to the indoor space through a blowing fan, and the humidifier generates water vapor through heating of water to humidify it, or an ultrasonic wave that sprays the supplied water into fine particles using a vibrator. It is supplied to the interior space through the method.

However, the conventional thermo-hygrostat has a disadvantage in that it consumes too much power to heat water together with the operation of the hot wire.

In addition, since the conventional thermo-hygrostat controls the warmth generated from the heating wire through multi-stage on/off control having different levels of power, not only cannot precise temperature control, but also wastes power.

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Republic of Korea Patent No. 10-1210798

The present invention has been made in view of the above problems, and the first object of the present invention is to place an evaporator in an air circulation path that is distributed with the test room to increase the temperature of circulated air up to 60 ° C ~ - without a separate heating means. It is an object of the present invention to provide an energy-saving constant temperature and humidity chamber that can save energy by maintaining a constant temperature within a range of 20° C. and maintain a constant humidity in a test room by providing a humidity control unit in the air circulation path.

A second object of the present invention is an energy-saving constant temperature and humidity control that enables effective temperature operation control by preventing overload of the compressor by exchanging heat with the low-pressure and low-temperature liquid through the third bypass line when the refrigerant discharged from the evaporator to the compressor is a low-pressure medium-temperature gas. to provide a chamber.

According to a feature for achieving the above object, a first invention relates to an energy-saving constant temperature and humidity chamber, which includes a housing; a test room formed inside the housing; and air in the test room. An air circulation path formed on the rear side of the test room so that ? is circulated; and a blowing fan disposed in the air circulation path to circulate the air inside the test room; and heating or cooling the air blown by the blowing fan. temperature control means having an evaporator; and a humidity control unit installed in the air circulation path to constantly adjust the internal humidity of the test room, wherein the temperature control means is disposed in the air circulation path to reduce or warm the air circulated in the test room. It consists of an evaporator, a compressor that receives the low-pressure low-temperature gas or low-pressure medium-temperature gas discharged from the evaporator and discharges it as a high-pressure, high-temperature gas, and a condenser that receives the high-pressure and high-temperature gas discharged from the compressor and discharges it as a high-pressure normal temperature liquid, The housing is further provided with a recovery tank for collecting condensate generated on the surface of the evaporator during dehumidification operation, and the evaporator precisely controls the discharge amount of the high-pressure normal temperature liquid discharged from the condenser and the high-pressure, high-temperature gas discharged from the compressor. It is configured to keep the circulated air at a constant temperature in the temperature range of -20 ° C to 60 ° C by operation control, and a first bypass line connected to the evaporator and a second bypass line are branched between the compressor and the condenser. A first solenoid valve for regulating the flow rate of the high-pressure, high-temperature gas discharged from the compressor is connected to the first bypass line, and a first stepping motor valve for controlling the flow rate of the high-pressure, high-temperature gas discharged from the compressor is connected to the second bypass line. The high-pressure, high-temperature gas discharged through the first and second bypass lines is controlled by ON/OFF of the first solenoid valve and the temperature of the first mixed high-pressure, high-temperature gas by precisely adjusting the opening of the first stepping motor valve. It is characterized in that the primary precise operation control.

In the second invention, in the first invention, the humidity control unit includes a water supply pipe, a storage tank connected to the water supply pipe, a compressor for increasing the pressure of the storage tank, and a filter unit for filtering water supplied from the storage tank. And, it is characterized in that it is configured to include a spray tube having a spray nozzle connected to the filter unit and exposed to the air circulation path or the test room.

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In the fourth invention, in the first invention, a second stepping motor valve is connected between the condenser and the evaporator to control the flow rate of the high-pressure normal temperature liquid discharged from the condenser, and the second stepping motor valve controls the flow rate. The liquid at room temperature is secondarily mixed with the first mixed high-pressure, high-temperature gas discharged through the first and second bypass lines and supplied to the evaporator, thereby increasing the temperature of the air heated or cooled through the evaporator within the maximum range of -20 ° C to 60 ° C. It is characterized by precise secondary operation control at 0.1 ° C intervals.

The fifth invention, in the first invention, further includes a plurality of third bypass lines branching between the condenser and the compressor to divert the high-pressure room-temperature liquid from the condenser to the compressor, wherein each of the third bypass lines includes a high-pressure room-temperature liquid A second solenoid valve for regulating the refrigerant is further connected to a capillary tube for converting a high-pressure room-temperature liquid into a low-pressure low-temperature gas, and the low-pressure low-temperature gas discharged through the capillary is mixed with the low-pressure medium-temperature gas when the refrigerant discharged from the evaporator to the compressor is a low-pressure medium-temperature gas. It is characterized in that it is configured to prevent overload of.

The sixth invention, in the first invention, is characterized in that a temperature sensor or humidity sensor for measuring temperature and humidity is further provided inside the test room.

According to the energy-saving constant temperature and humidity chamber of the present invention, an evaporator is placed in the air circulation path that is distributed with the test room, and the temperature of the circulated air is constant within a maximum range of 60 ° C to -20 ° C without a separate heating means to save energy. There is a saving effect.

In addition, there is an effect of maintaining a constant humidity in the test room by providing an anti-humidity unit in the air circulation path.

In addition, the process of lowering the surface temperature of the evaporator to 5 ° C. to 10 ° C. so that the moisture contained in the air is condensed on the surface of the evaporator is repeated so that the internal humidity of the test room can be dehumidified to 0%.

In addition, when the refrigerant discharged from the evaporator to the compressor is a low-pressure medium-temperature gas, heat is exchanged with the low-pressure low-temperature liquid through the third bypass line, thereby enabling effective temperature operation control by preventing overload of the compressor.

1 is a configuration diagram of an energy-saving constant temperature and humidity chamber according to an embodiment of the present invention;
2 is a block diagram showing a humidity control unit according to the present invention;
3 is a development view showing the refrigerant cycle of the temperature control means according to the present invention.

Objects, other objects, features and advantages of the present invention below will be easily understood through the following preferred embodiments in conjunction with the accompanying drawings. However, the present invention is not limited to the embodiments described herein and may be embodied in other forms.

Rather, the embodiments introduced herein are provided so that the disclosed content will be thorough and complete and the spirit of the present invention will be sufficiently conveyed to those skilled in the art.

Embodiments described and illustrated herein also include complementary embodiments thereof.

In this specification, singular forms also include plural forms unless specifically stated otherwise in a phrase. The terms 'comprise' and/or 'comprising' used in the specification do not exclude the presence or addition of one or more other elements.

Hereinafter, the present invention will be described in detail with reference to the drawings. In describing the specific embodiments below, various specific details have been prepared to more specifically describe the invention and aid understanding. However, readers who have knowledge in this field to the extent that they can understand the present invention can recognize that it can be used without these various specific details. In some cases, it is mentioned in advance that parts that are commonly known in describing the invention and are not greatly related to the invention are not described in order to prevent confusion in describing the present invention.

Hereinafter, the energy saving type constant temperature and humidity chamber according to the present invention will be described in detail together with the accompanying drawings.

1 is a configuration diagram of an energy-saving constant temperature and humidity chamber according to an embodiment of the present invention, FIG. 2 is a block diagram showing a humidity and humidity unit according to the present invention, and FIG. 3 is a development view showing a refrigerant cycle of a temperature control unit according to the present invention. am.

As shown in FIGS. 1 to 3, the present invention arranges the evaporator 41 in the air circulation path 30 circulating with the test room 20 to increase the temperature of the circulated air up to 60 ° C. Not only can energy be saved by maintaining a constant temperature within the range of -20 ° C, but also an energy-saving constant temperature that maintains a constant humidity in the test room (20) by providing a humidity control unit (50) in the air circulation path (30). It relates to the humidity chamber (100).

The energy-saving constant temperature and humidity chamber 100 of the present invention is largely composed of five parts, which are the housing 10, the test room 20, the air circulation path 30, the temperature control means 40, and the humidity unit. consists of (50)

The test room 20 is provided inside the housing 10 and has a structure that is opened or closed through a door 11 .

The test room 20 can function to maintain a constant temperature at a constant temperature by air heated or cooled in a set temperature range, as well as to maintain a constant internal humidity at a desired humidity through the constant humidity unit 50. .

To this end, an air circulation path 30 is formed at the rear of the test room 20, and a plurality of air circulation paths 30 are formed on the inner wall of the test room 20 so that hot or cold air generated in the air circulation path 30 can be circulated and circulated. A through hole 12 is further formed.

In addition, a temperature sensor 21 or a humidity sensor 22 may be further provided inside the test room 20 to measure temperature and humidity for constant temperature and humidity.

In addition, the air circulation path 30 has a blowing fan 31 for circulating air in the test room 20 and a temperature control means having an evaporator 41 for heating or cooling the air circulated by the blowing fan 31 ( 40) is disposed, and the humidity control unit 50 is installed to keep the internal humidity of the test room 20 constant.

The humidity control unit 50 includes a water supply pipe 51 connected to an external water supply facility, a storage tank 52 connected to the water supply pipe 51, and a compressor 53 for increasing the pressure of the storage tank 52. ), a filter unit 54 for filtering the water supplied from the storage tank 52, and a spray connected to the filter unit 54 and fixed to the side of the air circulation path 30 or the test room 20 It is configured to include a spray pipe 55 having a nozzle 551.

As shown in FIG. 2, the humidity control unit 50 in the embodiment of the present invention is that the spray pipe 55 having the spray nozzle 551 is installed in the air circulation path 30, and the humidity is controlled through a controller (not shown). When set, the control unit 60 controls the water supply valve V provided in the compressor 53, the water supply pipe 51, and the storage tank 52 to supply water to the air circulation path 30 through the spray nozzle 551. By spraying, the humidity of the test room 20 is adjusted and maintained constant by the air circulated through the air circulation path 30.

In the above, the water spray is sprayed by the water pressure of the water supply pipe 51 or the internal pressure of the storage tank 52, and at this time, the storage tank 52 may be provided with a pressure gauge 521 for measuring the internal pressure, The control unit 60 may control the compressor 53 to operate when the pressure of the pressure gauge 521 is lower than the set pressure.

In addition, the housing 10 may further include a recovery tank 13 for collecting condensate generated on the surface of the evaporator during the dehumidifying operation.

Here, the recovery tank 13 may be connected to the storage tank 52 so that the condensed water is supplied to the storage tank 52 by its own weight.

Even if the condensed water is contaminated, since the storage tank 52 is filtered through the filter unit 54, the water particles sprayed through the spray nozzle 551 are sprayed in a clean state.

The temperature control means 40 has a structure having an evaporator 41 for heating or cooling the air blown by the blowing fan 31 .

In the temperature control means 40, the evaporator 41 of the temperature control means 40 not only generates cold air of -20 ° C, but also heats air up to 60 ° C without a separate heating means to generate hot air. function to allow

As shown in FIG. 3, the temperature control unit 40 includes an evaporator 41, a compressor 42 and a condenser 43.

Here, the evaporator 41 is disposed in the air circulation path 30 to heat or cool the air circulated in the test room 20 .

The compressor 42 functions to receive low-pressure low-temperature gas or low-pressure medium-temperature gas according to the temperature state of the evaporator 41 and discharge it as high-pressure, high-temperature gas.

In addition, the condenser 43 functions to receive the high-pressure, high-temperature gas discharged from the compressor 42 and discharge it in a high-pressure room-temperature liquid state.

Here, the evaporator 41 precisely operates and controls the discharge amount of the high-pressure normal temperature liquid discharged from the condenser 43 and the high-pressure, high-temperature gas discharged from the compressor 42 to heat or cool the circulating air. do.

To this end, the evaporator 41 has a first bypass line L1 connected to the evaporator 41 between the compressor 42 and the condenser 43 to precisely control the temperature first, and a second bypass line L1 connected to the evaporator 41. It is a configuration in which the line L2 is branched.

The first bypass line (L1) and the second bypass line (L2) bypass a part of the high-pressure, high-temperature gas discharged from the compressor (42) and supply it to the evaporator (41). It functions to precisely control the temperature of the high-pressure, high-temperature gas supplied to the second bypass line (L2) and supply it to the evaporator (41).

At this time, the first solenoid valve (SV1) for regulating the flow rate of the high-pressure, high-temperature gas discharged from the compressor 42 is connected to the first bypass line (L1), and the compressor 42 is connected to the second bypass line (L2). A first stepping motor valve (SSV1) that precisely controls the flow rate of the high-pressure, high-temperature gas discharged from is connected.

Through this, the high-pressure, high-temperature gas discharged through the first and second bypass lines L1 and L2 precisely regulates the ON/OFF of the first solenoid valve SV1 and the opening of the first stepping motor valve SSV1. By adjusting the temperature of the mixed high-pressure, high-temperature gas, it is possible to precisely control the temperature first.

Here, the reason for branching into the first bypass line (L1) and the second bypass line (L2) is to use the temperature difference between the high-pressure, high-temperature gas of the first bypass line (L1) and the second bypass line (L2). When the temperature of the refrigerant in the 1st bypass line (L1) is 60℃ and the temperature of the refrigerant in the 2nd bypass line (L2) is 57℃, the opening degree of the first stepping motor valve (SSV1) is precisely adjusted to achieve a temperature of 60℃ to 57℃. By precisely adjusting within the range, it is possible to primarily control the temperature of the primary mixed high-pressure, high-temperature gas.

In addition, in order to control the cooling temperature of the evaporator 41 to a temperature range of -20 ° C, a second stepping motor controls the flow rate of the high-pressure room temperature liquid discharged from the condenser 43 between the condenser 43 and the evaporator 41. Valve SSV2 is connected.

At this time, the high-pressure room-temperature liquid whose flow rate is controlled by the second stepping motor valve SSV2 is secondarily mixed with the primary mixed high-pressure, high-temperature gas discharged through the first and second bypass lines L1 and L2, and then the evaporator 41 By being supplied to the evaporator 41, the temperature of the circulating air that exchanges heat with the evaporator 41 is precisely controlled for secondary operation (single control of the second stepping motor valve or 1,2 Simultaneous control of stepping motor valves).

Meanwhile, between the condenser 43 and the compressor 42, at least two branched third bypass lines L3 for diverting the high-pressure room temperature liquid of the condenser 43 to the compressor 42 are further included. In the present invention, the two third bypass lines L3 are branched.

The third bypass line L3 serves to prevent overload of the compressor 42 by mixing the refrigerant discharged from the evaporator 41 to the compressor 42 with the low-pressure, low-temperature liquid in the case of a low-pressure medium-temperature gas.

To this end, a second solenoid valve (SV2) for regulating the high-pressure room-temperature liquid and a capillary tube 44 for converting the high-pressure room-temperature liquid into a low-pressure and low-temperature gas are further connected to each of the third bypass lines (L3). The low-pressure low-temperature gas discharged through the evaporator 41 is mixed with the low-pressure medium-temperature gas discharged from the compressor 42 to exchange heat.

For example, the two third bypass lines (L3) are simultaneously opened through the second solenoid valve (SV2) to prevent overload of the compressor (42) when the refrigerant discharged from the evaporator (41) is a low-pressure medium temperature gas. , In the case of low-pressure low-temperature gas, one third bypass line (L3) may be closed and the remaining one third bypass line (L3) may be opened.

Here, each of the second solenoid valves (SV2) is regulated in inverse proportion to the temperature of the low-pressure medium-warm gas discharged from the evaporator (41).

Therefore, the refrigerant supplied to the compressor 42 is constantly supplied only with low-pressure, low-temperature gas, so that overload of the compressor 42 can be prevented, thereby achieving a more stable refrigerant cycle.

Hereinafter, the operation of the energy saving type constant temperature and humidity chamber of the present invention will be briefly described.

[When adjusting the humidity inside the test room]

1. If the humidity of the test room is increased by 20%

When the humidity is set to 20% through a controller (not shown), the internal humidity of the test room 20 is measured through the temperature sensor 21.

At this time, when the measured internal humidity of the test room 20 is 10%, the controller 60 turns on the water supply valve V provided in the compressor 53, the water supply pipe 51, and the storage tank 52. Controlly sprays water to the air circulation path 30 through the spray nozzle 551.

Then, the internal humidity of the test room 20 is increased by the air circulated through the air circulation path.

Then, when the internal humidity of the test room 20 reaches 20% through the temperature sensor 21, the controller 60 stops the operation of the compressor 53, and the water supply pipe 51 and the storage tank 52 By blocking the water supply valve (not shown) provided in the test room 20, the internal humidity of the test room 20 can be maintained at a constant humidity level.

2. When dehumidifying the humidity of the test room to 0%

When the humidity is set to 0% through a controller (not shown), the internal humidity of the test room 20 is measured through the temperature sensor 21 .

At this time, when the measured internal humidity of the test room 20 is 20%, the temperature of the evaporator 41 is raised to raise the temperature of the air to about 30°C.

Thereafter, the surface temperature of the evaporator 41 is lowered to 5 ° C to 10 ° C so that the moisture contained in the air is condensed on the surface of the evaporator 41 so that the process is repeated to reduce the internal humidity of the test room 20 to 0%. can be dehumidified up to

[In case of generating cold air]

After opening the second stepping motor valve SSV2 to supply the high-pressure room temperature liquid discharged from the condenser 43 to the evaporator 41, the circulating air passing through the evaporator 41 is cooled by the latent heat of vaporization of the high-pressure room temperature liquid. The temperature can be cooled to -20 ° C to generate circulating cold air.

At this time, the first solenoid valve (SV1) of the first bypass line (L1) is turned off, and the first stepping motor valve (SSV1) of the second bypass line (L2) precisely adjusts the flow rate of the refrigerant to set the temperature of the cold air to -20. can be adjusted up to °C.

[In case of generating hot air]

By opening the first solenoid valve (SV1) of the first bypass line (L1), high-pressure, high-temperature gas is supplied to the evaporator (41), and the temperature of the circulating air passing through the evaporator (41) is heated up to 60°C to generate circulating hot air. can make it

At this time, the second stepping motor valve SSV2 is blocked, and the second stepping motor valve SSV2 of the second bypass line L2 controls the flow rate of the refrigerant according to the temperature of the high-pressure, high-temperature gas in the first bypass line L1. The hot air temperature can be controlled up to 60℃ by precisely adjusting.

[When adjusting the temperature of hot and cold air]

The high-pressure, high-temperature gas discharged through the first and second bypass lines L1 and L2 is controlled by ON/OFF of the first solenoid valve SV1 and precisely adjusting the opening of the first stepping motor valve SSV1. 1st Precisely adjusts the temperature of the mixed high-pressure, high-temperature gas.

In addition, the high-pressure room-temperature liquid discharged from the second stepping motor valve SSV2 is mixed with the primary mixed high-pressure and high-temperature gas discharged through the first and second bypass lines L1 and L2 to increase the temperature of the circulating air heat-exchanged with the evaporator. The internal temperature of the test room 20 is controlled by heating or cooling the circulating air by precisely controlling the secondary operation (simultaneous control of the 1st and 2nd stepping motor valves) within the range of up to 60℃ ~ -20℃ at 0.1℃ intervals. It can be kept at constant temperature.

Of course, the energy saving type constant temperature and humidity chamber of the present invention can be used for testing of batteries, semiconductors, and electronic components.

Since the embodiments described in this specification and the configurations shown in the drawings are only one of the most preferred embodiments of the present invention and do not represent all of the technical spirit of the present invention, various equivalents that can replace them at the time of this application It should be understood that there may be variations and examples.

10: housing 11: door 12: through hole
13: recovery tank
20: test room 21: temperature sensor 22: humidity sensor
30: air circulation path 31: blowing fan
40: temperature control means 41: evaporator 42: compressor
43: condenser 44: capillary
SV1: 1st solenoid valve SV2: 2nd solenoid valve
SSV1: 1st stepping motor valve SSV2: 2nd stepping motor valve
L1: 1st bypass line L2: 2nd bypass line
L3: 3rd bypass line
50: humidity control unit 51: water supply pipe 52: storage tank
521: pressure gauge 53: compressor
54: filter unit 55: spray pipe
551: spray nozzle V: water supply valve
60: control unit
100: energy-saving constant temperature and humidity chamber

Claims (6)

housing 10;
a test room 20 formed inside the housing 10;
an air circulation path 30 formed on the rear side of the test room 20 so that air can be circulated in the test room 20;
a blowing fan 31 disposed in the air circulation path 30 to circulate the air inside the test room 20;
a temperature control means (40) having an evaporator (41) for heating or cooling the air blown by the blowing fan (31); and
A humidity control unit 50 installed in the air circulation path 30 to constantly adjust the internal humidity of the test room 20;
The temperature control unit 40 includes an evaporator 41 disposed in the air circulation path 30 to reduce or warm the air circulated in the test room, and a low pressure low temperature gas or low pressure discharged from the evaporator 41. Consisting of a compressor 42 receiving medium-temperature gas and discharging it as high-pressure, high-temperature gas, and a condenser 43 receiving the high-pressure, high-temperature gas discharged from the compressor 42 and discharging it as a high-pressure, normal-temperature liquid,
The housing 10 is further provided with a recovery tank 13 for collecting condensate generated on the surface of the evaporator 41 during dehumidification operation,
The evaporator 41 precisely operates and controls the discharge amount of the high-pressure normal temperature liquid discharged from the condenser 43 and the high-pressure, high-temperature gas discharged from the compressor 42, so that the circulating air is stored in a temperature range of -20°C to 60°C. It is configured so that it can be incubated in,
A first bypass line (L1) and a second bypass line (L2) connected to the evaporator (41) are branched between the compressor (42) and the condenser (43),
A first solenoid valve (SV1) is connected to the first bypass line (L1) to control the flow rate of the high-pressure, high-temperature gas discharged from the compressor (42).
A first stepping motor valve (SSV1) is connected to the second bypass line (L2) to control the flow rate of the high-pressure, high-temperature gas discharged from the compressor (42).
The high-pressure, high-temperature gas discharged through the first and second bypass lines L1 and L2 is controlled by ON/OFF of the first solenoid valve SV1 and precisely adjusting the opening of the first stepping motor valve SSV1. An energy-saving constant temperature and humidity chamber characterized in that the temperature of the primary mixed high-pressure and high-temperature gas is primarily precisely operated and controlled.
According to claim 1,
The humidity control unit 50 includes a water supply pipe 51 connected to an external water supply facility, a storage tank 52 connected to the water supply pipe 51, and a compressor 53 for increasing the pressure of the storage tank 52. ), a filter unit 54 for filtering the water supplied from the storage tank 52, and a spray connected to the filter unit 54 and fixed to the side of the air circulation path 30 or the test room 20 An energy-saving constant temperature and humidity chamber comprising a spray pipe 55 having a nozzle 551.
delete According to claim 1,
A second stepping motor valve (SSV2) is connected between the condenser 43 and the evaporator 41 to control the flow rate of the high-pressure room temperature liquid discharged from the condenser 43.
The high-pressure room-temperature liquid whose flow rate is controlled by the second stepping motor valve SSV2 is secondarily mixed with the primary mixed high-pressure and high-temperature gas discharged through the first and second bypass lines L1 and L2 and supplied to the evaporator 41. As a result, the temperature of the air heated or cooled through the evaporator 41 is precisely controlled by secondary operation at intervals of 0.1 ° C within a maximum range of -20 ° C to 60 ° C. Energy-saving constant temperature and humidity chamber.
According to claim 1,
Between the condenser 43 and the compressor 42, a plurality of third bypass lines L3 branched to bypass the high-pressure room temperature liquid of the condenser 43 to the compressor 42 are further included,
A second solenoid valve (SV2) for regulating the high-pressure room-temperature liquid and a capillary tube 44 for converting the high-pressure room-temperature liquid into a low-pressure, low-temperature gas are further connected to each of the third bypass lines (L3),
When the refrigerant discharged from the evaporator 41 to the compressor 42 is a low-pressure intermediate temperature gas, the low-pressure low-temperature gas discharged through the capillary tube 44 is mixed with the low-pressure medium-temperature gas to prevent overload of the compressor 42. Energy-saving constant temperature and humidity chamber.
According to claim 1,
An energy-saving constant temperature and humidity chamber, characterized in that a temperature sensor 21 or a humidity sensor 22 for measuring temperature and humidity is further provided inside the test room 20.

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