KR101370871B1 - Thermohygrostat with enhanced humidifier - Google Patents

Abstract

The present invention relates to a thermo-hygrostat humidifying by a vaporization humidifier and significantly improving the humidification capacity and refrigeration efficiency while heating by a refrigeration cycle, wherein the humidity is controlled by a vaporization humidifier and the temperature is controlled by a refrigeration cycle. In the constant temperature and humidity chamber, a bucket filled with water is provided near the vaporized humidifier to supply water to the vaporized humidifier to vaporize, but the condensed refrigerant pipe of the refrigeration cycle passes through the bucket. In addition, the water and the condensation refrigerant in the water tank heats the water, heat evaporation capacity of the water and at the same time remove the flash gas (flash gas) of the condensation refrigerant to increase the supercooling of the refrigerant.

Description

Thermo-hygrostat with improved humidification capacity and freezing efficiency at the same time {THERMOHYGROSTAT WITH ENHANCED HUMIDIFIER}

The present invention relates to a thermo-hygrostat, and more particularly, to a humidification by a vaporized humidifier, and a heating and humidification by a refrigeration cycle, while remarkably improving the humidification capacity and freezing efficiency.

The thermo-hygrostat, which is mainly used for computer room, precision measurement room, engine laboratory, clean room of semiconductor factory, etc., is used for cooling, heating, dehumidification and humidification to maintain constant set temperature (eg 22 ℃) and set humidity (eg 45%). Have the means. Among these, cooling and dehumidification are mainly performed in summer and are easily performed by a refrigeration cycle using a reheat condenser.

The room where the thermo-hygrostat is installed is mainly a room equipped with a system or device that emits a lot of heat such as a computer room. Therefore, the cooling and dehumidification operation is mainly performed, but in winter, the room temperature may drop below the set temperature and the set humidity. In this case, heating and humidification should be performed. Winter heating and humidification are mostly done at the same time.

The heating and humidification of the thermo-hygrostat should be initiated immediately if the room temperature and humidity are 1 to 3 ° C or 1 to 3% below the set temperature or set humidity to ensure that the set temperature and set humidity can be reached within a minimum amount of time.

The heating can be done by changing the refrigerant circulation direction of the refrigeration cycle used for cooling and dehumidifying the thermo-hygrostat and configuring a heat pump that condenses in the indoor unit and evaporates in the outdoor unit, but in the case of heating with such a heat pump, Four-way valve must be used to convert refrigerant and the circuit of refrigeration cycle is complicated, so it is not only frequent, but also evaporation occurs in the outdoor heat exchanger during heating, causing freezing and freezing problems in the outdoor heat exchanger. Defrost is undesirable because it blocks the evaporation heat source, leading to poor evaporation of the refrigerant, which in turn results in damage to the compressor.

Therefore, the heating operation in the conventional thermo-hygrostat was performed by stopping the refrigeration cycle for cooling and dehumidification, operating only a small heating heater installed in front of the evaporator, and circulating the indoor air by the blower. However, such heating heater heating only heats a part of the incoming air, it takes a lot of time to reach the set temperature, there is a disadvantage that the efficiency is consumed a lot of power.

Conventional thermo-hygrostat accommodates water in a fan (pan) that is open above the humidification to heat the water with a heater such as an electron electrode rod to generate steam, or sprayed water around the evaporator with a pump and a nozzle.

However, the heating method using the electromagnetic electrode or the like consumes too much power to reach the humidified state of the set humidity, and even after reaching the set humidity, it is easy to be humidified above the set humidity by the residual heat of the heater in the humidifier. When used, it is difficult to maintain the clean state of humidified air because water is easily contaminated by water in the humidifier, and when the calcium, manganese, chlorine, iron oxide, etc. precipitate and accumulate around the electrode, the heat generated by the heater in the electrode There was a problem that the electron electrode rod burst due to accumulation without being delivered to the outside.

The method of spraying water on the surface of the evaporator has a problem in that mist is generated in the air and condensation easily occurs in other parts of the thermo-hygrostat or other devices in the room. Mist can also adversely affect the human respiratory system.

In order to solve the humidification problem in a constant temperature and humidity cabinet, the vaporization type humidifier is employ | adopted in a constant temperature and humidity chamber in recent years. An example is disclosed in Korean Utility Model Model Publication No. 20-0392911. However, the evaporative humidifier that has been employed in a constant temperature and humidity chamber has a disadvantage that the time required to raise the humidity to a set humidity is too long because it is sprayed on the evaporative humidification element by purifying or sterilizing cold water. Humidification is usually done in winter, while winter time is very low, whereas water vaporization works well when the water temperature is kept higher than the ambient temperature.

The present invention was made to solve the problems of the winter heating operation and humidification operation of the above-mentioned constant temperature and humidity chamber, the problem to be solved by the present invention while humidifying and heating using a vaporizing humidifier and a refrigeration cycle humidification ability and freezing efficiency It is to provide a constant temperature and humidity chamber at the same time.

An object of the present invention as described above, in a constant temperature and humidity chamber in which the humidity is controlled by a vaporized humidifier and the temperature is controlled by a refrigeration cycle, a water-filled bucket is provided near the vaporized humidifier to vaporize the water in the bucket. It is supplied to the type humidifier to vaporize, the condensed refrigerant tube of the refrigeration cycle is passed through the water tank, the water and condensed refrigerant heats the water in the water tank while heat-exchanging, to increase the evaporation capacity of the water and at the same time This is solved by removing the flash gas and increasing the supercooling degree of the refrigerant.

According to the present invention, by allowing the water to be injected into the vaporized humidifier to exchange heat with the condensation refrigerant of the refrigeration cycle in the bucket before the injection, it is easy to raise the water in the bucket to a temperature of 30 ℃ ~ 40 ℃ easy to vaporize in winter The condensation refrigerant may be condensed in the condenser of the refrigeration cycle and then exchanged with water again in the water tank before being supplied to the expansion valve to increase the supercooling, thereby improving the efficiency of the refrigeration cycle for heating.

1 is a block diagram of a thermo-hygrostat with improved humidification capacity and freezing efficiency according to the present invention.

Hereinafter, specific embodiments of the present invention will be described in detail with reference to FIG. 1.

As shown in Figure 1, the thermo-hygrostat according to the present invention can be used by connecting two refrigeration cycles in parallel to compensate for the temperature in a short time during heating operation. The first refrigeration cycle is composed of a first compressor (3a), a first outdoor condenser (5a), a first reheat condenser (21a), a first expansion valve (E1) and an evaporator (23), the second refrigeration cycle is It consists of the 2nd compressor 3b, the 2nd outdoor condenser 5b, the 2nd reheat condenser 21b, the 2nd expansion valve E2, and the evaporator 23. As shown in FIG. The evaporator 23 has an integrated fin, but the internal coil is separated for the first and second refrigeration cycles.

If the room temperature is slightly lower than the set temperature (for example below 2 ℃), only one of the first refrigeration cycles will be operated.However, if the room temperature is lower than the set temperature (for example, above 2 ℃), for quick temperature recovery The first refrigeration cycle and the second refrigeration cycle are operated simultaneously.

One port (c) of the three-way valve (T1, T2) is connected to the discharge end of the compressor (3a, 3b) and the remaining ports (a, b) are the reheat condenser (21a, 21b) and the outdoor unit installed in the indoor unit (29) It is connected to outdoor condensers 5a and 5b installed in 1a and 1b. Ball ports B1 and B3 and safety valves S1 and S3 are provided in parallel with ports b and c of the three-way valves T1 and T2. In the heating operation or the dehumidification operation, the ball valves B1 and B3 are manually opened to pass only a predetermined ratio (for example, 20%) of the refrigerant, and the a port of the three-way valves T1 and T2 is Fully open In this way, a part (for example, 80%) of the high-pressure side refrigerant flows into the reheat condensers 21a and 21b, and the rest (for example, 20%) flows into the outdoor condensers 5a and 5b. During cooling operation or dehumidification operation, close port a and open port b of the three-way valve (T1, T2) to block the refrigerant circulation to the reheat condenser (21a, 21b) and to condense only in the outdoor condenser (5a, 5b). In the heating operation or the humidification operation, the refrigerant remaining in the outdoor condensers 5a and 5b during the cooling operation or the humidification operation may be circulated through the ball valves B1 and B3. When the ball valves B1 and B2 are not present, the refrigerant remaining in the outdoor condensers 5a and 5b is excluded from the refrigerant circulation of the refrigeration cycle during the cooling operation or the humidification operation, resulting in the refrigerant shortage of the refrigeration cycle in operation. The ball valves B1 and B2 may be opened in the same state during the heating operation or the humidification operation even during the cooling operation or the dehumidification operation. This is because the port a of the three-way valves T1 and T2 is closed and the port b is opened during the cooling operation or the dehumidification operation, so that the refrigerant passing through the ball valves B1 and B3 joins the refrigerant passing through the b port. The ball valves B1 and B3 connected in parallel to the three-way valves T1 and T2 are such that the amount of heat emitted from the reheat condensers 21a and 21b during heating operation or humidification operation is not excessively greater than the amount of heat absorbed by the evaporator 23. It is also used to make adjustments as high as necessary for temperature compensation. This is because the heating compensation temperature in the thermo-hygrostat is only 2 to 3 ° C., and therefore it is not necessary to increase the amount of heat of condensation in the reheat condensers 21a and 21b.

The safety valves (S1, S3) is the pressure of the compressor (3a, 3b) rises above the set pressure (for example 23Kg / ㎠) due to failure of the three-way valve (T1, T2) or poor evaporation in the evaporator It is configured to open automatically.

The constant temperature and humidity controller according to the present invention is heated by the reheat condenser 21a, 21b by adjusting the air volume of the air passing through the evaporator 23 during the heating operation or the humidification operation, an imbalance between the refrigerant and condensation and evaporation may occur. As a result, the internal temperatures of the compressors 3a and 3b may rise abnormally. Therefore, between the condensation refrigerant pipes P3 and P9 for conveying the liquid refrigerant condensed in the outdoor condensers 5a and 5b and the low pressure refrigerant pipes P6 and P12 for introducing the low pressure refrigerant into the compressors 3a and 3b. The injection pipes P15 and P16 are connected to each other, and expansion valves E3 and E4 and solenoid valves S2 and S4 are provided in the liquid refrigerant injection pipes P15 and P16 to discharge gas from the compressors 3a and 3b. When the refrigerant temperature rises above a predetermined temperature (for example, 95 ° C.), the low temperature low pressure gas refrigerant expanded from the expansion valves E3 and E4 is opened by opening the solenoid valves S2 and S4 to the compressors 3a and 3b. It is desirable to allow input. Through this, the abnormally overheated compressors 3a and 3b temperature can be lowered to a steady state in a short time. As illustrated in FIG. 1, ball valves B2 and B4 may be further provided in the liquid refrigerant injection pipes P15 and P16 to allow a user to selectively use the liquid refrigerant injection function.

In FIG. 1, 7a, 7b is a well-known receiver, 13a, 13b is a well-known sight glass, 15a, 15b is a well-known filter drier. Reference numerals C1 to C4 are known check valves. The solenoid valve S5 connected in series with the first expansion valve E1 and the solenoid valve S6 connected in series with the second expansion valve E2 are opened when the first refrigeration cycle or the second refrigeration cycle operates, respectively.

As shown in Figure 1, the thermo-hygrostat according to the present invention controls the humidity by the evaporative humidifier 19 and the temperature by the refrigeration cycle. Features of the present invention, by providing a bucket (9) filled with water near the vaporized humidifier (19) to supply the water in the bucket (9) to the vaporized humidifier (19) to be vaporized, the bucket ( 9) allows the condensation refrigerant pipes P4 and P10 of the refrigerating cycle to pass through, thereby heating the water while the water and the condensation refrigerant exchange heat in the bucket 9, increasing the evaporation capacity of the water and flushing the condensation refrigerant at the same time. The supercooling of the refrigerant is increased by removing the flash gas. The present invention is to heat the water in the bucket (9) to a temperature of 30 ° C ~ 40 ° C which is easy to vaporize in winter, and to increase the supercooling degree of the refrigerant to the maximum evaporation in the evaporator before the refrigerant is expanded.

The water container 9 is provided with a water pipe W1 for supplying city water, and the water pipe W1 is provided with a solenoid valve S9 for supplying water only during a humidification operation. As shown in Figure 1, the water pipe (W1) is further provided with a ball valve (B6) can be opened only during the seasons need humidification, such as winter.

The water in the bucket 9 is heated by the condensation refrigerant and then sterilized by a UV sterilizer (ultraviolet sterilizer) 17 and then supplied to the vaporized humidifier 19. As shown in FIG. 1, a ball valve B5 is installed in parallel with the UV sterilizer 17, so that a part of the water does not pass through the UV sterilizer 17 directly to the vaporized humidifier 19. It is desirable to be supplied. When water passes through the UV sterilizer 17, ozone may be generated by ultraviolet rays, and when the amount is excessive, ozone is mixed in the air and introduced into the room, which is harmful to the human body. By adjusting only a part of the water to pass through the UV sterilizer 17 through the ball valve (B5), it is possible to easily lower the amount of ozone to be introduced into the room below an acceptable level.

As shown in FIG. 1, the liquid refrigerant passing through the water tank 9 and the gas refrigerant passing through the evaporator 23 exchange heat with each other to increase the supercooling degree of the liquid refrigerant, and to increase the superheat degree of the gas refrigerant. economizer 11 may be further provided.

As described above, the refrigeration cycle according to the present invention further includes not only the reheat condenser 21a, 21b, but also outdoor condensers 5a, 5b, and the discharge refrigerant of the compressors 3a, 3b is the reheat condenser 21a. , 21b) and supplied to the outdoor condenser 5a and 5b at a predetermined ratio, and recombine the refrigerant condensed in the reheat condenser 21a and 21b and the outdoor condenser 5a and 5b, respectively. Pass through the interior.

With this configuration, during the heating operation or the humidification operation, the refrigerant is transferred from the a port / ball valve (B1)-> reheat condenser 21a / outdoor condenser of the compressor (3a)-> three-way valve (T1). (5a) and receiver (7a)-> condensation refrigerant tube P2 / condensation refrigerant tube P3-> condensation refrigerant tube P4-> bucket (9) _ economizer (11)-> sight glass (13a)-> filter dryer (15a) )-> First expansion valve (E1)-> Evaporator (23)-> Compressor (3a) in order. When operating the second refrigeration cycle at the same time as the first refrigeration cycle, the refrigerant in the second refrigeration cycle is a port / ball valve (B3)-> reheat condenser (21b) of the compressor (3b)-> three-way valve (T2) / Outdoor condenser (5b) and receiver (7b) The dryer 15b-> second expansion valve E2-> evaporator 23-> compressor 3b circulates in this order. At this time, when the indoor humidity is lower than the set humidity, the solenoid valve (S9) of the water pipe (W1) is heated to heat the water in the bucket (9) and then supplied to the vaporized humidifier (19) to humidify. When the inside of the bucket 9 is filled with water and the solenoid valve S9 is opened, the water heated in the filled state in the bucket 9 is pressurized toward the vaporized humidifier 19 and supplied to the vaporized humidifier 19.

As shown in FIG. 1, the compressors 3a and 3b, the reheat condensers 21a and 21b, the expansion valves E1 and E2 and the evaporator 23 constituting the refrigerant cycle are known components. In the constant temperature and humidity chamber indoor unit 29 of the present invention, the evaporator 23, the reheat condensers 21a and 21b, and the vaporized humidifier 19 are sequentially arranged according to the circulating air flow direction formed by the air circulation fan F3. do. Another feature of the present invention is that between the evaporator 23 and the reheat condenser 21a, 21b of the indoor unit 29, the indoor air is directly passed through the reheater 21a, 21b and vaporization without passing through the evaporator 23. By providing an intermediate damper 27 that can flow into the humidifier 19, air cooled in the evaporator 23 and indoor air not cooled in the evaporator 23 are mixed to vaporize the reheat condenser 21a, 21b and vaporization. It is to be put in the food humidifier (19). The intermediate damper 27 is opened during a heating operation and a humidification operation, and a part of the air introduced into the indoor unit 29 circulated by the air circulation fan F3 is introduced through the air filter 25, and the indoor unit ( The remaining air introduced into 29 is introduced through the intermediate damper 27. With the above configuration, the present invention mixes the air that has passed through the evaporator 23 with the air that has not passed through the evaporator 23 to further compensate the temperature and the amount of air. In this configuration, the present invention controls the amount of heat absorbed by the evaporator 23 to a level suitable for heating or humidification. In addition, the present invention is to maintain the temperature of the air introduced into the reheat condenser (21a, 21b) and the evaporative humidifier (19) in such a configuration to the heat level absorbed by the evaporator (23) and the reheat condenser (21a) The difference in calories emitted in 21b) makes it easy to raise the room air to the set temperature. Moreover, this invention raises the temperature of the air applied to the vaporization type humidifier 19 easily to the temperature (20 degreeC or more) which is easy to vaporize water with such a structure.

By providing such an intermediate damper 27, when the amount of air passing through the evaporator 23 is reduced, poor evaporation may be caused temporarily by the reduction of the amount of evaporation heat during heating and dehumidification operation, thereby causing the evaporator 23 The pressure may temporarily drop excessively. This can cause overheating and damage of the compressor. The present invention provides the evaporation pressure control valve (S8, S7) between the high pressure refrigerant pipe (P1, P7) and the refrigerant suction end of the evaporator 23, so that the evaporator pressure is below a certain pressure (for example 4.5Kg / ㎠) When it is lowered into the high pressure gas refrigerant is bypassed to be temporarily put into the evaporator (23). Through this, it is possible to continue to operate the refrigeration cycle without interruption by solving the problem of poor evaporation caused by the evaporation calorie control.

As mentioned above, although the exemplary embodiment of the present invention was exemplarily described with reference to the accompanying drawings, the scope of protection of the present invention is not limited thereto. It must be decided.

1a, 1b: outdoor unit 3a, 3b: compressor
5a, 5b: outdoor condenser 7a, 7b: receiver
9: bucket 11: economizer
13a, 13b: sight glass 15a, 15b: filter drier
17: UV sterilizer 19: vaporized humidifier
21a, 21b: reheat condenser 23: evaporator
25: air filter 27: intermediate damper
29: indoor unit B1 ~ B6: ball valve
C1 ~ C4: Check Valve E1 ~ E4: Expansion Valve
F1, F2: Blower F3: Air Circulation Fan
P1 ~ P16: Refrigerant pipe S1 ~ S9: Solenoid valve
T1, T2: 3-way valve W1, W2: Water pipe

Claims (3)

In the constant temperature and humidity chamber which controls the humidity by the evaporative humidifier and the temperature by the refrigeration cycle,
The refrigeration cycle is composed of known compressors (3a, 3b), reheat condensers (21a, 21b), expansion valves (E1, E2) and evaporator (23),
The evaporator 23, the reheat condenser 21a, 21b and the evaporative humidifier 19 are sequentially arranged in the constant temperature and humidity chamber indoor unit according to the circulation air flow direction formed by the air circulation fan (F3), the evaporator ( Between the 23) and the reheat condenser 21a, 21b, an intermediate damper 27 capable of directly introducing indoor air into the reheater 21a, 21b and the vaporized humidifier 19 without passing through the evaporator 23 is provided. Humidification capacity and freezing characterized in that the air cooled in the evaporator 23 and the air not cooled in the evaporator 23 is mixed into the reheat condenser (21a, 21b) and the evaporative humidifier (19) Constant temperature and humidity with improved efficiency.
The method of claim 1,
In the vicinity of the vaporized humidifier (19) to provide a bucket filled with water (9) to supply the water in the bucket (9) to the vaporized humidifier (19) to be vaporized,
The condensation refrigerant pipes P4 and P10 of the refrigeration cycle pass through the water tank 9 to heat the water while the water and the condensation refrigerant heat exchange in the water tank, increase the evaporation capacity of the water and flush the condensation refrigerant. Humidity and refrigerating efficiency improved at the same time, characterized in that to increase the supercooling of the refrigerant by removing the gas (flash gas).
3. The method of claim 2,
In the refrigerating cycle, outdoor condensers 5a and 5b are provided, and the discharge refrigerant of the compressors 3a and 3b is distributed and supplied to the reheat condensers 21a and 21b and the outdoor condensers 5a and 5b at a predetermined ratio. And the refrigerant condensed in the reheat condenser (21a, 21b) and the outdoor condenser (5a, 5b), respectively, to pass through the inside of the water tank, characterized in that the constant temperature and humidity at the same time improved .

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