JP2001132982A - Air conditioner - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an air conditioner having an improved coefficient of performance(COP) and simplification of draining. SOLUTION: In an indoor unit 10, a heat exchanger thermally connected with the evaporator 15 of a refrigeration cycle is divided into dehumidifier 11 dehumidifying a part of taken-in air (reverse Y shaped mark in Figure) cooling it below the dew point and a cooling part 14 cooling the mixture of the dehumidified air and the remain of the taken-in air and discharging it. Corresponding to it, the evaporator is divided into an evaporator 15a for cooling heat exchanging with the cooling part 14 and the evaporator for dehumidifying 15b provided with a second expansion valve 17 between the evaporator 15a for cooling and the dehumidifying evaporator 15b. The dehumidifying part 11 comprises the evaporator 15b for dehumidifying and a heat exchanging heat exchanger. The air (reverse Y shaped mark) from the inside of a room is taken in through the dehumidifying part 11 by a blower 12 and dehumidified and the air (truncated chevron mark) from the inside of the room is taken in as it is through an opening part 16. The cooling temperature of the mixed air of the dehumidified air and the taken-in air as it is at the cooling part 14 is the wet-bulb temperature of above the dew point.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a performance index (CO)
The present invention relates to an air conditioner that has improved P) and facilitated drainage.

[0002]

2. Description of the Related Art FIG. 3 is a conceptual diagram of a refrigeration cycle used in an air conditioner. In the outdoor unit 50, the vapor refrigerant evaporated in the evaporator 31a of the indoor unit 30 is sucked into the compressor 51, compressed, sent to the condenser 52, and cooled by the condenser 52 to be a liquid refrigerant. In the indoor unit 30, the high-pressure liquid refrigerant sent from the condenser 52 is sent out to the evaporator 31 a through the expansion valve 39. The liquid refrigerant evaporates in the low-pressure evaporator 31a, and the surroundings are cooled by the heat exchanger 31. Air is sucked in from outside through the heat exchanger 31 by the blower 32 and discharged to the outside, thereby cooling the outside. FIG. 4 is a schematic side view of a conventional air conditioner indoor unit. In the indoor unit 40,
A blower 42 sucks air from the room through a heat exchanger 41 that performs heat exchange with an evaporator of a refrigeration cycle, cools the room, and sends out the cooled air through a blower outlet 44 to cool the room. When the temperature of the heat exchanger 41 is equal to or lower than the dew point temperature of the air B to be sucked in, dew forms on the heat exchanger 41.
Therefore, there is a problem that the thermal resistance between the heat exchanger and the air increases, and the performance index (COP) of the refrigeration cycle decreases. Further, it is necessary for the dew receiving tray 43 to receive all the water condensed on the heat exchanger 41. If the heat exchanger 41 is large, the equipment for drain becomes large.

[0003]

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and has as its object to provide an air conditioner that improves the figure of merit (COP) and facilitates drainage.

[0004]

SUMMARY OF THE INVENTION A compressor for compressing and sending vapor refrigerant evaporated in an evaporator, a condenser for cooling the vapor refrigerant sent from the compressor to a liquid refrigerant, and a high-pressure refrigerant from the condenser. A refrigeration cycle consisting of an expansion valve for sending liquid refrigerant to the evaporator, an evaporator for evaporating the liquid refrigerant sent through the expansion valve and cooling the surroundings, a blower for sucking air from the outside and discharging it to the outside, In an air conditioner consisting of a heat exchanger that performs heat exchange between air and an evaporator,
The heat exchanger is divided into a dehumidifying section that cools a part of the air sucked into the heat exchanger below the dew point and dehumidifies it, and a cooling section that cools and discharges the mixed air of the dehumidified air and the rest of the sucked air. When the mixed air is cooled by the cooling unit by dehumidifying a part of the inhaled air, the temperature is set to a wet bulb temperature at which dew condensation does not occur.

[0005] The dehumidifying section is divided into two parts, a cooling evaporating section for exchanging heat with a heat exchanger serving as a cooling section, and a dehumidifying evaporating section provided with a second expansion valve between the cooling evaporating section. It is divided into a heat exchanger for heat exchange with the dehumidifying evaporator.

A means for varying the size of the opening of the second expansion valve is provided, and the wet-bulb temperature of the mixed air is adjusted by the size of the opening of the second expansion valve.

[0007] A compressor that compresses and sends vapor refrigerant evaporated in the evaporator, a condenser that cools the vapor refrigerant sent from the compressor into a liquid refrigerant, and a high-pressure liquid refrigerant from the condenser to the evaporator. A refrigeration cycle consisting of an expansion valve to send out, an evaporator to evaporate liquid refrigerant sent through the expansion valve to cool the surroundings, a blower to suck air from outside and discharge it to the outside, and between the sucked air and the evaporator An air conditioner comprising a heat exchanger for exchanging heat with a Peltier element having a heat-dissipating-side junction thermally connected to an evaporator, and a heat-absorbing-side junction of the Peltier element serving as a dehumidifying unit for removing air inhaled. When the mixed air is cooled by the cooling unit including the heat exchanger, the temperature is set to a non-condensing wet bulb temperature.

A means for varying the magnitude of the current supplied to the Peltier element is provided, and the wet bulb temperature of the mixed air is adjusted according to the magnitude of the current supplied to the Peltier element.

Means are provided for varying the amount of air supplied to the dehumidifying section and the amount of air supplied to the cooling section, and the wet bulb temperature of the mixed air is adjusted by the amount of air supplied to the dehumidifying section and the cooling section.

The heat exchanger serving as a cooling unit is composed of a plurality of flat fins having a horizontal plane that is thermally connected to the evaporator, and also serves as a louver for rectifying discharged cooling air. .

The fins constituting the heat exchanger have a structure in which the fin spacing is increased toward the air discharge side.

The fins constituting the heat exchanger have a structure in which the fin spacing is narrowed downward from the heat exchanger.

[0013]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a schematic side view of an indoor unit of one embodiment of an air conditioner according to the present invention. Indoor unit 1
At 0, a heat exchanger thermally connected to the evaporator 15 of the refrigeration cycle similar to that described with reference to FIG.
And a cooling unit 14 for cooling and discharging the mixed air of the dehumidified air and the remainder of the inhaled air. Correspondingly, the evaporator also exchanges heat with the cooling unit 14 for the cooling evaporator 1.
It is divided into two: a dehumidifying evaporator 15b provided with a second expansion valve 17 between the cooling evaporator 5a and the cooling evaporator 15a. And
The dehumidifying unit 11 includes a heat exchanger that exchanges heat with the dehumidifying evaporating unit 15b. The blower 12 sucks in air from the room through the dehumidifier 11 to dehumidify the air, and also sucks in air from the room through the opening 16 as it is. Then, the mixed air of the dehumidified air and the air sucked as it is is cooled to a wet bulb temperature at which no condensation occurs when it is cooled by the cooling unit 14 including a heat exchanger that exchanges heat with the cooling evaporating unit 15a. As a result, only the dehumidifying part 11 that is a part of the cooling part is condensed and does not condense on the cooling part 14, so that the thermal resistance between the air and the cooling part 14 does not increase due to the dew condensation, and the coefficient of performance does not increase. (COP) is improved. In addition, the dew tray 13 only needs to receive dew water from the dehumidifying section 11 alone, and the drain equipment can be simplified.

The second expansion valve 17 is constituted by a needle valve or the like which opens and closes electromagnetically so that the size of the opening can be changed, and the size of the opening of the second expansion valve 17 is adjusted. In addition, the wet bulb temperature of the mixed air is adjusted. Alternatively, the opening 16 can be electromagnetically opened and closed, and the amount of air C sucked directly from the room is adjusted.
Thus, the wet-bulb temperature of the mixed air is adjusted, and the wet-bulb temperature at which no condensation occurs when the mixed air is cooled by the cooling unit 14 is set.

FIG. 2 is (A) a side view conceptual diagram of an indoor unit of another embodiment of the air conditioner according to the present invention, and (B) a perspective view of FIG. In the indoor unit 20, a Peltier element 28 is provided in which the heat-dissipation-side junction is thermally connected to a part of the evaporator 25 of the refrigeration cycle similar to that described in FIG. A dehumidifying section 21 made of fins or the like for exchanging heat with the Peltier element 28 is provided at the heat absorbing side joint of the Peltier element 28. The blower 22 sucks in air from the room through the dehumidifying unit 21 to dehumidify the air, and also sucks in air from the room through the opening 26 as it is. When the mixed air of the dehumidified air and the air sucked as it is cooled in the cooling unit 24, the temperature is set to a wet bulb temperature at which no dew condensation occurs. As a result, the dew condensation portion becomes only the dehumidifying portion 21 which is a part of the cooling portion, and the dew condensation does not occur in the cooling portion 24. Therefore, the thermal resistance between the air and the cooling portion 24 does not increase due to the dew condensation. The coefficient (COP) is improved. Further, the dew receiving tray 23 only needs to receive dew water from the dehumidifying unit 21 alone, and the drain equipment can be simplified.

A power supply for driving the Peltier element 28
The wet bulb temperature of the mixed air is adjusted by changing the magnitude of the current supplied to the Peltier element 28. Alternatively, as described above, the opening 26 can be electromagnetically opened and closed, and the amount of air sucked from the room as it is is adjusted to supply the amount of air sucked through the dehumidifying unit 21 and the air to the cooling unit 24. The wet-bulb temperature of the mixed air is adjusted by changing the ratio of the amount of air to be mixed. With these, the wet-bulb temperature of the mixed air is adjusted, and the cooling unit 24 is adjusted.
Wet bulb temperature at which condensation does not occur when cooling at.

In the conventional heat exchanger 41 shown in FIG. 4, the planes of the fins constituting the heat exchanger are generally oriented in a vertical direction so that water droplets of dew are easily dropped. However, since there is no condensation in the cooling units 14 (FIG. 1) and 24 (FIG. 2) according to the present invention, the planes of the fins constituting the heat exchangers serving as the cooling units 14 and 24 need to be arranged in the horizontal direction. it can. This allows the cooling units 14 and 24 to also have the function of a louver for rectifying the air to be discharged. Further, the fins constituting the heat exchangers serving as the cooling units 14 and 24 have a structure in which the fin spacing is increased toward the air discharge side so that the cooled air is uniformly discharged into the room. Further, the fins constituting the heat exchangers serving as the cooling units 14 and 24 have a structure in which the fin interval is narrowed toward the lower side of the heat exchanger, so that the fins are cooled and emit a large amount of heavy air upward. In addition, the room temperature is made uniform.

[0018]

As described above, a compressor for compressing and sending vapor refrigerant evaporated in an evaporator, a condenser for cooling the vapor refrigerant sent from the compressor to a liquid refrigerant, A refrigeration cycle consisting of an expansion valve that sends high-pressure liquid refrigerant to the evaporator, an evaporator that cools the surroundings by evaporating the liquid refrigerant sent through the expansion valve, and a blower that sucks air from the outside and discharges it to the outside An air conditioner comprising a heat exchanger for exchanging heat between inhaled air and an evaporator, a dehumidifying unit for dehumidifying by cooling a part of the air inhaled from the heat exchanger to a dew point or less, And a cooling unit that cools and releases the mixed air of the inhaled air and the rest of the inhaled air, and dehumidifies part of the inhaled air to cool the mixed air in the cooling unit. By condensation It becomes only dehumidifying unit which is a part of the cooling part, since the cooling unit without condensation, air and it is no coefficient of performance of the heat resistance increases by condensation of the cooling section (C
OP) is improved. Similarly, the portion to be drained becomes smaller, and the equipment for drain can be simplified.

[Brief description of the drawings]

FIG. 1 is a conceptual side view of an indoor unit of an embodiment of an air conditioner according to the present invention.

FIG. 2 is a schematic (A) side view of an indoor unit according to another embodiment of the air conditioner according to the present invention, and FIG.

FIG. 3 is a conceptual diagram of a refrigeration cycle used for an air conditioner.

FIG. 4 is a conceptual side view of an indoor unit of a conventional air conditioner.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Indoor unit 11 Dehumidifying part 12 Blower 13 Dew receiving tray 14 Cooling part 15 Evaporator 15a Cooling evaporating part 15b Dehumidifying evaporating part 16 Opening 17 Expansion valve 20 Indoor unit 21 Dehumidifying part 22 Blower 23 Dew receiving tray 24 Cooling part 25 Evaporator 26 Opening 28 Peltier element 30 Indoor unit 31 Heat exchanger 31a Evaporator 32 Blower 39 Expansion valve 40 Indoor unit 41 Heat exchanger 42 Blower 43 Dew tray 44 Outlet 50 Outdoor unit 51 Compressor 52 Condenser

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) F25B 21/02 F24F 1/00 391A 25/00 391B

Claims (9)

[Claims] 1. A compressor that compresses and sends vapor refrigerant evaporated in an evaporator, a condenser that cools the vapor refrigerant sent from the compressor into a liquid refrigerant, and evaporates a high-pressure liquid refrigerant from the condenser. A refrigeration cycle consisting of an expansion valve that sends out to the vessel, an evaporator that cools the surroundings by evaporating the liquid refrigerant sent through the expansion valve, a blower that sucks in air from the outside and discharges it to the outside, the sucked air and the evaporator An air conditioner consisting of a heat exchanger that performs heat exchange between the dehumidifier and a dehumidifier that cools a part of the air drawn into the heat exchanger below the dew point and dehumidifies the air. It is characterized in that it is divided into a cooling unit that cools and discharges the mixed air with the rest, and dehumidifies part of the inhaled air, so that the mixed air is cooled to a wet-bulb temperature when it is cooled in the cooling unit. Air conditioner. 2. The dehumidifying section is divided into two parts, a cooling evaporating section for exchanging heat with the cooling section, and a dehumidifying evaporating section provided with a second expansion valve between the cooling evaporating sections. 2. The air conditioner according to claim 1, wherein the air conditioner comprises a heat exchanger for exchanging heat with the dehumidifying evaporator. 3. The method according to claim 1, further comprising the step of providing a means for varying the size of the opening of the second expansion valve, and adjusting the wet-bulb temperature of the mixed air according to the size of the opening of the second expansion valve. The air conditioner according to claim 2, wherein 4. A compressor that compresses and sends vapor refrigerant evaporated by an evaporator, a condenser that cools the vapor refrigerant sent from the compressor into a liquid refrigerant, and evaporates a high-pressure liquid refrigerant from the condenser. A refrigeration cycle consisting of an expansion valve that sends out to the vessel, an evaporator that cools the surroundings by evaporating the liquid refrigerant sent through the expansion valve, a blower that sucks in air from the outside and discharges it to the outside, the sucked air and the evaporator In the air conditioner consisting of a heat exchanger that performs heat exchange between the peltier element, the radiating side junction is thermally connected to the evaporator, and the air is sucked in the dehumidifying part consisting of the heat absorbing side junction of the peltier element. An air conditioner characterized in that a part of the air is cooled below the dew point and dehumidified so that the mixed air has a wet-bulb temperature at which no condensation occurs when the mixed air is cooled by a cooling part comprising a heat exchanger. 5. A method according to claim 1, further comprising means for varying the magnitude of the current supplied to the Peltier element, and adjusting the wet bulb temperature of the mixed air according to the magnitude of the current supplied to the Peltier element. Item 4. The air conditioner according to Item 4. 6. A means for varying the amount of air supplied to the dehumidifying unit and the amount of air supplied to the cooling unit, and adjusting the wet bulb temperature of the mixed air based on the amount of air supplied to the dehumidifying unit and the cooling unit. The air conditioner according to claim 2 or 4, wherein the air conditioner is operated. 7. A heat exchanger serving as a cooling unit is composed of a plurality of flat fins having a horizontal plane that is thermally connected to the evaporator, and has a louver function of rectifying cooling air to be discharged. The air conditioner according to claim 1 or 4, wherein the air conditioner is also used. 8. The air conditioner according to claim 7, wherein the fins constituting the heat exchanger have a structure in which the fin spacing is increased toward the air discharge side. 9. The air conditioner according to claim 7, wherein the fins constituting the heat exchanger have a structure in which a fin interval is narrowed downward from the heat exchanger.