JPS59195068A - Method of dehumidification-operating air conditioner - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The unexploded Ricoh relates to a dehumidifying λM/transfer method for an air conditioner.

Air conditioners capable of conventional cooling and temperature removal operations are installed in 1.2.
To explain with diagrams, (1) in Figure 1 is the compressor, (2)
is the discharge pipe, (3) is the outdoor heat exchanger, (4) is the first solenoid valve (a solenoid valve that closes when cooling and opens when dehumidifying), (51 is the first cooling capillary tube, (6) ) is the first indoor heat exchanger (a heat exchanger that works as an evaporator during cooling and as a condenser during dehumidification and heating), (71 is the second solenoid valve (
(8) is the second dehumidifying cabillary tube, (9) is the second indoor heat exchanger (it functions as an evaporator during cooling and dehumidification, and is used as a heating valve). ('1 is the heat exchanger that acts as a condenser), QQ is the suction pipe, Ql) is the charge modulator, (12iQ3) is the piping, θD is the outdoor fan, (201 is the indoor ventilation inlet in Figure 2), ( 2
2) is the drain pan, (23) is the indoor professional R rough fan, f
24) is the blowout louver, the solid line arrow, or the flow of the cold tofu during cooling operation, with no specific details or bright lines. During dehumidification operation, the high-temperature, high-pressure refrigerant that exits the compressor (1) (the one-pointed line) (see arrow) passes through the discharge pipe (2), the outdoor heat exchanger (3), and the first solenoid valve (4:, piping α3) to the first female internal heat exchanger (6).
I am guided by 1. The heat exchanger (3:) and the first indoor heat exchanger (6) radiate heat to the outside and the refrigerant undergoes adiabatic expansion in the second dehumidifying cabin retube (8). , absorbs heat in the second outdoor heat exchanger (9), and returns to the compressor (1) via the suction pipe 00). On the other hand, the indoor air (see the two-dot chain arrow) passes through the suction port (a) and enters the second indoor heat exchanger (9) (which functions as an evaporator during cooling and dehumidification, and as a condenser during heating). exchanger), where it is cooled and dehumidified, and then led to the first indoor heat exchanger (6) (a heat exchanger that functions as an evaporator during cooling and as a condenser during dehumidification and heating). , where it is reheated (heated).Then, the indoor heat exchanger (9) is blown out into the room via the blowout louver (24).
The condensed water (124) adhering to the drain pan (124) is collected in the drain pan (2).

When the air conditioner is in dehumidifying operation and the outside temperature is low, as shown in Figure 813, the amount of heat dissipated increases.
The refrigerant pressure in the high pressure circuit decreases as shown by the solid line (A).

Therefore, the refrigerant pressure in the low pressure circuit (second indoor heat exchanger (
9)) decreases as shown by the solid line (A2), and when the saturation temperature becomes below 0° C., the condensed water Q4J changes from water to frost or ice. When frost forms on the second indoor heat exchanger (9), heat exchange with the indoor air becomes impossible, making it impossible to perform fertilization and dehumidification operations.

The present invention addresses the above-mentioned problems, and during cooling operation, the refrigerant discharged from the compressor is transferred to the heat source side heat exchanger, the first core, the first indoor heat exchanger, and the second indoor heat exchanger. In an air conditioner that circulates the refrigerant from the compressor to the compressor in this order, during dehumidification operation, the refrigerant discharged from the compressor is passed through the second indoor heat exchanger, the second heat exchanger, the first indoor heat exchanger, An air conditioner characterized by circulating indoor air to a compressor through a heat source side heat exchanger in this order, and causing indoor air to flow through a first indoor heat exchanger and a second indoor heat exchanger in this order. The purpose of the dehumidifying operation method is to provide a dehumidifying operation method for an air conditioner that can perform dehumidification without forming frost on the indoor heat exchanger even when the temperature of the heat source water is high. .

Next, an example of an air conditioner used in the rush flow of the dehumidifying operation method of the present invention will be explained in detail with reference to Fig. 6.4.
~ (131C1ICI) (2H31 (24) jar
(y) f<B minutes, and in this air conditioner, the first indoor heat exchanger (6) (during cooling and dehumidifying As an evaporator,
A heat exchanger (heat exchanger that functions as a condenser during heating) is installed, and a second indoor heat exchanger (9)C is installed downstream that functions as an evaporator during cooling.
A heat exchanger (heat exchanger that functions as a condenser during dehumidification and heating) will be installed. Also, Q4) is a four-way valve, with a discharge pipe (2) and a suction pipe (
10) and arranged between the outdoor heat exchanger (3) and the second indoor heat exchanger (9). Other aspects are the same as before.

Next, the operation of the air conditioner will be explained. During cooling operation,
Same as before. In other words, the refrigerant moves as shown by the solid arrow.
Compressor (11, discharge pipe (2), four-way valve θ-like outdoor heat exchanger (31, first cooling capillary tube (5), piping (131, first indoor heat exchanger (L, second Solenoid valve (
7), the second indoor heat exchanger (9), the four-way valve (14), and the suction pipe 00), and then returns to the compressor (1). In addition, the charge modulator function is the same as before, and the piping (131
is at low pressure and operates normally. Also, during dehumidification operation, the four-way valve Q4) is switched. At this time, the compressor (1)
The high-temperature, high-pressure refrigerant that exits the discharge pipe (2) and four-way valve.
The heat is then led to the second indoor heat exchanger (9) (a heat exchanger that works as an evaporator during cooling and as a condenser during dehumidification, unlike conventional heat exchangers), where it is radiated to the outside (indoor air) and heat exchanged. The liquid refrigerant expands adiabatically in the second dehumidifying capillary tube (8), and then enters the first indoor heat exchanger (6), which functions as an evaporator during cooling and unlike conventional evaporators during dehumidification. Here, it absorbs heat from the outside (air inside the dormitory), pipe 03], first solenoid valve (4) (closed when cooling, opened when dehumidified), outdoor heat exchanger (3) (used as a condenser during cooling, dehumidified) Sometimes, unlike the conventional method, the four-way valve works (heat exchanges) with the evaporator and returns to the compressor (1) through the four-way valve 0-like suction pipe (10). In this case, the pressure in pipe 03) will be low, so the charge modulator function will not operate normally and the modulator (11) will not be in a full liquid state (in the mountains with low outside air). First indoor heat exchanger (6
) and the outdoor heat exchanger (3), the amount of heat absorbed by the refrigerant cycle increases, and the first indoor heat exchanger (6) can be effectively dehumidified without frost formation. If the rotation speed of 07) is increased, the heat radiating part of the second indoor heat exchanger (9) is increased, and a dehumidifying operation with a heating effect accompanied by a rise in room temperature can be performed. That is, as shown in FIG. 16, as the outside temperature decreases, both the high pressure side (broken line A3) and the low pressure side (broken line A4) decrease. However, by increasing the rotation speed of the outdoor fan (17), the amount of heat absorbed by the outdoor tA exchanger (3) increases, and both the high and low pressures decrease significantly. Frost formation on the indoor heat exchanger (6) is prevented.

In addition, in this embodiment, the dehumidifying system is connected only to the second heat exchanger (9) on the condenser side, and the internal volume of the condenser is reduced compared to the conventional one, which, combined with the charge modulator function, eliminates the refrigerant shortage situation. and be able to drive properly.

Other embodiments are shown in FIGS. 5 to 12.

Figure 5 shows the function of the first frost valve (J and second solenoid valve (7) in Figure 6, which can be replaced with check valves (4A) <, 7A) to reduce costs. There is. Note that the first check valve (4A) is operated during dehumidification operation, and the second check valve (7A) is operated during dehumidification operation.
5- Arrange the refrigerant in the direction in which it flows during operation. Fig. 6 shows a refrigerant circuit that can perform heating operation in addition to cooling and dehumidification, and has a sixth solenoid valve (151 (open for cooling/dehumidification, closed for heating) and sixth heating capillary α6). Additionally, during dehumidification and heating, the four-way valve θ4) is switched to create a reverse cycle. Further, in FIG. 7, the first π1 valve (4) in FIG. 6 is replaced with a check valve (4A), thereby making it possible to reduce costs. The first check valve (
4A) is arranged in the direction in which the refrigerant flows during dehumidification and heating operations. In each of the embodiments shown in FIGS. 5 to 7, the pressure in the pipe θ3) becomes low during cooling, dehumidification, and heating, and the charge modulator function operates normally. Dehumidification operation IJ4
The function and effect of J are the same as in the embodiment shown in FIG. Note that the charge modulator Ql) is '1. s may be omitted. In addition, in the case of each of the embodiments described in ``2'' below, it becomes difficult to operate the air conditioner with a slight dehumidifying effect, or in such a case, since it is desired to lower the indoor temperature, the air conditioner is switched to the cooling direction while the indoor temperature is still high. It is good to do this, and it is good to remove the slag from one to one and five times indoors. Further, using a bimetallic valve instead of the second box 1 solenoid valve (7) or the second check valve (7A) causes the following problem. That is, the bimetal valve changes the flow direction depending on the temperature difference of the inlet refrigerant, but in the present invention, as shown in FIG. , the flow of refrigerant, and the two-dot chain arrow indicates the flow of indoor air), since the reverse cycle is used during both heating and dehumidification, the temperature of the refrigerant leaving the second indoor heat exchanger (9) is Since there is no temperature difference like there is during cooling, it is difficult to apply a metal valve. The pressure regulating three-way valve (78'
), which has a hollow cylinder (2!51) and a pressure adjustment spring (A) inside it.When the inlet pressure is low, the refrigerant entering from the three-way valve C2n flows through the hollow cylinder as shown in Figure 11. (c) The pipe passes through the inside and exits from the 2-way exit opening.Also, when the inlet pressure is high, the pressure adjustment spring (26+) contracts as shown in Figure 12, and the piston enters from the three-way valve inlet (5). The refrigerant passes through the hollow cylinder (c) and exits from the capillary side outlet (2).
In the figure, a solenoid valve (4) is used on the first valve side, and in FIG. 10, a check valve (4A) is used on the first valve side. Next, the operation of the air conditioner shown in FIG. 9 will be explained. During heating or dehumidification, refrigerant flows into the three-way valve (7A') through the second indoor heat exchanger (9). As is clear from Fig. 16, when the outside temperature is low and heating operation is necessary, the refrigerant pressure in the high pressure circuit is low and the three-way valve (78') is in the state shown in Fig. 11. Refrigerant flows through the bypass pipe (8A) and heating operation begins. Conversely, when the outside temperature is high, the refrigerant pressure in the high-pressure circuit (the second indoor heat exchanger (
9) becomes high, and the three-way valve (7A')
The state shown in the figure is reached, and the second turbidity removal capillary tube (8
), the refrigerant flows through the dehumidifying operation. As described above, the three-way valve (7A') automatically switches between heating operation and dehumidification operation depending on the outside temperature.

When the refrigerant is in use, the refrigerant flows through the first indoor heat exchanger (61) and through the bypass pipe (8A) to the three-way valve (7A') due to the resistance difference with the second dehumidifying capillary tube (8).

Note that two on-off valves or a three-way valve and a check valve can be used instead of the four-way valve θ4). Moreover, indoor professionals can reverse the direction of indoor air flow from the conventional one by reversing the rough angle or reversing the front and back of the first and second indoor heat exchangers.

Although the present invention has been described above with reference to embodiments, it goes without saying that the present invention is not limited to such embodiments, and that various design modifications can be made without departing from the spirit of the present invention. .

[Brief explanation of drawings]

Fig. 1 is a refrigerant circuit diagram of a conventional air conditioner, Fig. 2 is a 1-meter longitudinal cross-sectional view thereof, and Fig. 6 is a refrigerant circuit diagram showing an example of an air conditioner used to implement the dehumidifying operation method according to the present invention. , 4th
Figure 5.6.7 is a refrigerant circuit diagram showing another example of an air conditioner, Figure 8 is an explanatory diagram showing the flow of refrigerant in the present invention, and Figure 9.10 is a longitudinal side view of the same. A refrigerant circuit diagram showing yet another example of an air conditioner, Figure 11.12 is a vertical h' showing the pressure regulating three-way valve used in the air conditioner of Figure 9.10.
j' is a side view, and FIG. 16 is an explanatory diagram of the operation of the conventional and preferred method. (1)...Compressor, (3)...Heat source side heat exchanger, (
5)...first aperture, (6)...-first indoor heat exchanger, (8)...second aperture, (9)...-second indoor heat exchanger. Sub-Agent Patent Attorney Shige Okamoto 2 people outside the vehicle Figure 1 Bee 2 (branch) 3M Figure 4 4 Figure 5 6 Figure 7 8M Port 10 Figure 11 Figure 120

Claims (1)

[Claims] In an air conditioner, during cooling operation, refrigerant discharged from the compressor is circulated to the compressor through a heat source side heat exchanger, a first throttle, a first indoor heat exchanger, and a second indoor heat exchanger in this order. During dehumidification operation, the refrigerant discharged from the compressor is circulated to the compressor through the second indoor heat exchanger, the second throttle, the first indoor heat exchanger, and the heat source side heat exchanger in this order. A dehumidifying operation method for an air conditioner in which air is passed through a first indoor heat exchanger and a second indoor heat exchanger in this order.