JP2001311566A - Air conditioner - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an air conditioner in which a plurality of capillary tubes are arranged, their opening or closing operations are carried out under a control of a solenoid valve, and when a surrounding atmosphere temperature is normal one, a high efficient operation is performed and in turn when the surrounding atmosphere temperature is high, an over-heating of a compressor can be prevented. SOLUTION: When a normal operation is carried out at an air conditioner having two parallel capillary tubes 35, 36 arranged therein, a solenoid valve 37 for the second capillary tube 36 is closed up to a value near a thermal allowable limit of a compressor under a state in which a surrounding atmosphere temperature does not exceed the value near a thermal allowable limit of the compressor, its operation is performed under a high efficiency along a curved line D-C-B, and subsequently to the value near the thermal allowable limit (near 35 deg.C), the aforesaid solenoid valve 37 is opened to cause the air conditioner to be operated with the two parallel capillary tubes 35, 36, and even if the surrounding atmosphere temperature is in a high temperature range along a curved line G-F-A, an overheated state of a compressor 24 is prevented and a safe operation of it is performed within a wider temperature range.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to an air conditioner having a dehumidifying function.

[0002]

2. Description of the Related Art Conventionally, in an air conditioner having a dehumidifying function for home use, a refrigerant is compressed by a compressor 24 through a condenser (condenser) 16 and a capillary tube 32 as shown in FIG. A heat cycle to be supplied to the evaporator (evaporator) 15 is formed, and the air sucked into the main body case from the intake port is dehumidified through the evaporator, and then turned into dry air warmed from the exhaust port via the condenser. Released into the room.

[0003] Usually, only one capillary tube 32 is used in this heat cycle. Then, the dehumidifying capacity per day of the air conditioner having the dehumidifying function increases in proportion to the outside air temperature as shown in FIG. Generally, the dehumidification capacity is indicated by the amount of dehumidification per day at an outside air temperature of 27 ° C. and a humidity of 60%.

Judging from the graph of FIG. 5 (B), it seems that the air conditioner can be operated more efficiently as the outside air temperature is higher. However, in practice, the air conditioner operates naturally due to the allowable heat limit of the compressor of the air conditioner. Upper limit of the outside air temperature (3
5 ° C). Therefore, in order to be able to use even at an outside air temperature of 40 ° C. or higher, it was necessary to reduce the dehumidifying ability at a normal operating temperature (around 27 ° C.) to operate.

[0005]

As described above, according to the conventional air conditioner having only one capillary tube having a dehumidifying function, the operating characteristics are uniquely determined and the capacity of the air conditioner is fully utilized. could not. Therefore, the present invention provides a plurality of capillary tubes and performs opening and closing operations by an electromagnetic valve, thereby performing high-efficiency operation when the outside air temperature is a normal temperature and efficiently preventing overheating of the compressor when the outside air temperature is high. It is an object to provide a safe and air conditioned air conditioner.

[0006]

In order to achieve the above object, an air conditioner according to a first aspect of the present invention compresses a refrigerant with a compressor and supplies the refrigerant to an evaporator via a condenser and a capillary tube. Then, in the air conditioner that dehumidifies the air sucked into the main body case from the intake port through the evaporator, and discharges the air from the exhaust port through the condenser, the capillary tube is connected in series with the first capillary tube and the electromagnetic valve. The second capillary tubes are connected in parallel.

[0007] Thus, by providing a plurality of capillary tubes and an electromagnetic valve, it is possible to control the operation of the air conditioner to exhibit the maximum capacity for each of the arbitrary outside air temperature and humidity, and to perform the operation even in a region where the outside air temperature is high. By preventing overheating of the compressor, safe operation can be performed in a wider temperature range.

[0008] An air conditioner according to a second aspect of the present invention comprises:
The refrigerant is compressed by the compressor, supplied to the evaporator through the condenser and the capillary tube, and the air sucked into the main body case from the intake port is dehumidified through the evaporator, and then discharged from the exhaust port through the condenser. In the air conditioner, a capillary tube is connected in parallel to a first capillary tube and a second capillary tube connected in series with an electromagnetic valve, and the sum of the diameters of the first capillary tube and the second capillary tube is: 1 for the same model
The diameter was set substantially equal to the diameter of the capillary tube.

Thus, by setting the sum of the diameters of the first capillary tube and the second capillary tube to be substantially equal to the diameter of one capillary tube used in the same model, the friction resistance in the capillary tube is reduced. It can be adjusted by opening and closing the valve.

[0010] The air conditioner according to claim 3 of the present invention comprises:
The refrigerant is compressed by the compressor, supplied to the evaporator through the condenser and the capillary tube, and the air sucked into the main body case from the intake port is dehumidified through the evaporator, and then discharged from the exhaust port through the condenser. In the air conditioner, a capillary tube is connected in parallel to a first capillary tube and a second capillary tube connected in series with an electromagnetic valve, and the first capillary tube and the second capillary tube have the same diameter and The length was set to be almost twice as long as one capillary tube of the same diameter used in the same model.

Thus, the diameter of the first capillary tube and the diameter of the second capillary tube 36 are the same and the length thereof is set to almost twice the length of one capillary tube of the same diameter used in the same model. Thereby, the friction resistance in the capillary tube can be adjusted by opening and closing the electromagnetic bubble.

An air conditioner according to a fourth aspect of the present invention is:
The refrigerant is compressed by the compressor, supplied to the evaporator through the condenser and the capillary tube, and the air sucked into the main body case from the intake port is dehumidified through the evaporator, and then discharged from the exhaust port through the condenser. In an air conditioner, a capillary tube is formed by connecting a first capillary tube and a second capillary tube connected in series with an electromagnetic valve in parallel, and the electromagnetic force of the second capillary tube is increased to near the heat allowable limit of the compressor. The operation is performed with the valve closed, and after the vicinity of the heat allowable limit, the electromagnetic valve is opened to operate.

Thus, in a state in which the outside air temperature does not occur near the heat allowable limit of the compressor, the electromagnetic bubble of the second capillary tube is closed to the vicinity of the heat allowable limit of the compressor to operate with high efficiency. Near the permissible limit (around 35 ° C)
After that, by opening the electromagnetic bubble and operating with two parallel capillary tubes, even in the region where the outside air temperature is high, the compressor can be prevented from overheating, and the operation can be safely performed in a wider temperature range. Can be.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, an embodiment of the air conditioner of the present invention will be described in detail with reference to FIGS. 1 is a side sectional view of the main body of the air conditioner, FIG. 2 is a front cross sectional view of the main body, and FIG. 3 is a front view of the main body. In the figure, reference numeral 1 denotes a rectangular main body case that is long in the front-rear direction when viewed from above, and includes a pair of cases 2 and 3 and a bottom plate 4. Reference numeral 5 denotes a partition wall that partitions the inside of the main body case 1 into two chambers, an upper chamber 6 and a lower chamber 7. Reference numeral 8 denotes an intake port formed on both opposite sides of the main body case 1 on the upper chamber 6 side, 9 denotes an exhaust port formed on the upper surface of the main body case 1, 10 denotes a communication between the intake port 8 and the exhaust port 9. This is an air flow path.

Reference numeral 11 denotes a blower disposed in the air flow path 10, which comprises a motor 12 and a fan 13, sucks air from an intake port 8, and exhausts air through an air flow path 10.
From the exhaust. 14 is the blowing unit 11
A heat exchange section provided on the more upstream side, comprising a evaporator 15 and a condenser 16 provided on the downstream side of the evaporator 15, and a support section 17 provided upright on the upper surface of the partition plate 5; It is fixed by a holding portion 18 formed on one of the cases 2.

Reference numeral 19 denotes a handle provided on the upper surface of the main body case 1 so as to be able to be turned upside down, and reference numeral 20 denotes a partition plate for partitioning the lower chamber 7 into two compartments, a storage compartment 21 and a machine compartment 22. The storage chamber 22 stores a drainage tank 27 described below, which is detachably mounted via a mounting opening 23 formed in the main body case 1,
The machine room 22 accommodates a compressor 24 described later.

Reference numeral 24 denotes a compressor disposed in the machine room 22, which is connected to the condenser 16, a capillary tube (not shown) and the evaporator 15 by piping not shown.
A refrigerant is circulated through the condenser 16 and the evaporator 15.

By circulating the refrigerant to the condenser 16 and the evaporator 15 by the compressor 24, the condenser 16 performs a heat releasing operation and the evaporator 15 performs a heat absorbing operation.
The air sucked into the main body case 1 from the air inlet 8 is cooled when passing through the evaporator 15, and the moisture in the air is dehumidified by dew condensation on the surface of the evaporator 15.
When the air passes through the exhaust port 9, the air is heated to lower the relative humidity and is exhausted from the exhaust port 9. The dew water adhering to the surface of the evaporator 15 is dropped on the partition plate 5.

Reference numeral 25 denotes a recess formed in the partition plate 5 below the evaporator 15 so that the condensed water dropped on the partition plate 5 from the evaporator 15 is collected. 26 is the recess 25
Is a drain hole formed substantially at the center.

Reference numeral 27 denotes a drainage tank which is detachably stored in the storage chamber 21 through the mounting port 23, and the condensed water dropped on the partition plate 5 is guided to the drainage tank 27 through the drainage hole 26. ing. Reference numeral 28 denotes a handle provided on the drain tank 27.

A cover 29 covers the upper surface of the drainage tank 27 and has a drainage opening 30 near the mounting port 23. Three
Reference numeral 1 denotes a guide hole provided in the cover 29, which is provided at a position facing the drain hole 26, and guides the condensed water dripped from the drain hole 26 into the drain tank 27.

The drainage tank 27 is provided with a full-water detecting means (not shown), which detects that the dew condensation water has accumulated in the drainage tank 27 to a predetermined water level and notifies the user.

Reference numeral 33 denotes an operation unit provided above the main body case 1 on the surface of the drainage tank 27 on which the mounting port 23 is formed, a switch 34 for operating / stopping, a display unit for displaying an operation state (not shown), and a drainage unit. A full-water display unit or the like for notifying when a full state of the tank 27 is detected is provided.

Thus, the switch 3 of the operation unit 33
By operating the motor 4, the indoor air is taken into the main body case 1 from the intake port 8 provided in the main body case 1 by the drive of the motor 12, dehumidified by dew condensation in the evaporator 15, and heated by the condenser 16. After that, it is returned to the room through the exhaust port 9.

The water condensed in the evaporator 15 is dropped on the partition plate 5 as water droplets, and a drain hole 26 formed in the partition plate 5 is formed.
Then, it flows down to the drain tank 27 through the guide hole 31 formed in the cover 29. When a predetermined amount of condensed water has accumulated in the drain tank 27, a control unit (not shown) stops operation and turns on a full water display unit (not shown) to turn on the drain tank 2.
It notifies that the inside of 7 is full. Then, the drainage tank 27 is pulled out from the main body case 1 and drained to the outside.

In the air conditioner having such a configuration, a conventional one is configured to form a heat cycle in which a refrigerant is compressed by a compressor and supplied to an evaporator through a condenser and one capillary tube. There is an upper limit (around 35 ° C.) of the outside air temperature at which the air conditioner can be operated by itself according to the allowable heat limit of the compressor of the air conditioner. Therefore, in order to be able to use even at an outside air temperature of 40 ° C. or higher, there is a disadvantage that the dehumidifying ability at a normal operating temperature (around 27 ° C.) has to be reduced to operate.

Therefore, in the present invention, as shown in FIG. 4A, a heat cycle is formed in which the refrigerant is compressed by the compressor 24 and supplied to the evaporator 15 through the condenser 16 and the capillary tube. Is constructed by connecting a first capillary tube 35 and a second capillary tube 36 connected in series with an electromagnetic valve 37 in parallel.

The sum of the diameters of the first capillary tube 35 and the second capillary tube 36 is set substantially equal to the diameter of one capillary tube used in the same model. Thereby, the frictional resistance in the capillary tube can be adjusted by opening and closing the electromagnetic valve 37.

Further, the first capillary tube 3
5 and the second capillary tube 36 have the same diameter and the length is set to be approximately twice as long as one capillary tube of the same diameter used in the same model. This also allows the friction resistance in the capillary tube to be adjusted by opening and closing the electromagnetic valve 37.

Next, the operation of the air conditioner composed of two parallel capillary tubes 35 and 36 shown in FIG. 4A will be described. When the refrigerant is compressed by the compressor 24 and the refrigerant from the condenser 16 is supplied to the evaporator 15 through only one capillary tube 35 with the electromagnetic valve 37 closed, the dehumidifying capacity characteristic is shown in FIG. As shown in B), a curve of DCB is obtained.

The refrigerant from the condenser 16 is supplied to the two capillary tubes in which the electromagnetic valve 37 is opened and the first capillary tube 35 and the second capillary tube 36 connected in series with the electromagnetic valve are connected in parallel. The dehumidifying ability characteristic when supplying to the evaporator 15 through FIG.
As shown in (B), the curve becomes a GFA curve.

In the former case, the dehumidifying ability is larger than that of the GFA curve at a normal operating temperature (around 27 ° C.), but the compressor 24 can overheat in a region where the outside air temperature is high. There is. In the latter case, the dehumidifying ability is smaller than that of the DC-B-C curve at the normal operating temperature, but the compressor 24 can be used even in a region where the outside air temperature is high.
Overheating can be avoided.

Therefore, in a state where the outside air temperature does not occur near the heat allowable limit of the compressor, the electromagnetic valve 37 of the second capillary tube 36 is closed to the vicinity of the heat allowable limit of the compressor, and the DCB curve is obtained. The solenoid valve 3 is operated with high efficiency along the
7. Open 7 and two parallel capillary tubes 35,
By operating at 36, overheating of the compressor 24 is prevented even in a region where the outside air temperature is high along the curve of GFA, and the compressor 24 is safely operated in a wider temperature range.

In the above embodiment, two capillary tubes are provided. However, if there is a sufficient space in the configuration of the air conditioner and the complexity of the control can be cleared, the number of the capillary tubes is not limited to two and more than two. By providing the capillary tube and the electromagnetic valve, it is possible to control the operation of the air conditioner to achieve the maximum capacity for each of the arbitrary outside air temperature and humidity.

[0035]

As described above, the air conditioner having a dehumidifying function of the present invention is provided with a plurality of capillary tubes and an electromagnetic valve to exhibit the maximum capacity of the air conditioner for each arbitrary outside air temperature and humidity. In addition, it is possible to prevent overheating of the compressor even in a region where the outside air temperature is high, and to perform a safe operation in a wider temperature range.

In particular, until the outside air temperature is close to the heat allowable limit where the compressor does not overheat, the solenoid valve of the second capillary tube is closed to operate with high efficiency until near the heat allowable limit of the compressor, By opening the solenoid valve and operating with two parallel capillary tubes after the vicinity of the heat allowable limit (around 35 ° C.), even in a region where the outside air temperature is high, the compressor is prevented from being overheated. It can be operated safely in a wide temperature range.

[Brief description of the drawings]

FIG. 1 is a side sectional view of a main body of an air conditioner of the present invention.

FIG. 2 is a front sectional view of the main body of the air conditioner of the present invention.

FIG. 3 is a front view of the main body of the air conditioner of the present invention.

FIG. 4 is a diagram showing a heat cycle and a performance curve of the air conditioner of the present invention.

FIG. 5 is a diagram showing a heat cycle and a performance curve of a conventional air conditioner.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Main body case 2, 3 Side case 8 Inlet 9 Exhaust port 12 Motor 13 Fan 15 Evaporator 16 Condenser 24 Compressor 27 Drain tank 33 Operation part 32, 35, 36 Capillary tube 37 Electromagnetic valve

Claims (4)

[Claims] 1. A refrigerant is compressed by a compressor, supplied to an evaporator through a condenser and a capillary tube, and air sucked into a main body case from an intake port is dehumidified through the evaporator and then dehumidified through the condenser. An air conditioner discharging air from an exhaust port, wherein the capillary tube is configured by connecting a first capillary tube and a second capillary tube connected in series with an electromagnetic valve in parallel. 2. The apparatus according to claim 1, wherein the sum of the diameters of the first capillary tube and the second capillary tube is set substantially equal to the diameter of one capillary tube used in the same model. Air conditioner. 3. The first capillary tube and the second capillary tube have the same diameter and the length thereof is set to be approximately twice as long as one capillary tube having the same diameter used in the same model. The air conditioner according to claim 1, wherein: 4. A refrigerant is compressed by a compressor, supplied to an evaporator through a condenser and a capillary tube, and air sucked into a main body case from an intake port is dehumidified through the evaporator and then dehumidified through the condenser. In an air conditioner discharging from an exhaust port, a capillary tube is configured by connecting a first capillary tube and a second capillary tube connected in series with an electromagnetic valve in parallel, and a second capillary tube is disposed near a heat allowable limit of the compressor. The air conditioner is operated by closing the electromagnetic valve of the capillary tube described above, and operating after opening the electromagnetic valve near the heat allowable limit.