JPH02183776A - Air conditioner - Google Patents

Abstract

PURPOSE:To prevent a reevaporation of dew water when an operation of an air conditioner is stopped, improve a storing characteristic of a flow rate adjusting device and further reduce an expenditure by a method wherein a valve having a small hole is arranged at an intermediate part of an indoor heat exchanger divided. CONSTITUTION:A valve movable part 16 of a two-way valve 24 having a small hole is made such that a coil 18 is mounted around an attracting element 17 which is movable in an upward or a downward direction. In case that a solenoid valve is fully opened, an energization of a coil 18 causes the movable valve 16 to be attracted to the attracting element 17. In case that it is applied for adjusting a flow rate of refrigerant, the movable valve 16 closely contacts with a valve seat 19 and the refrigerant may pass through a lateral hole 21 and a vertical hole 22. A two-way valve 24 having a hole is inserted into an intermediate stage of an indoor heat exchanger as a flow rate adjusting device. Indoor heat exchangers 2 and 3 are divided into an upper part and a lower part. The refrigerant is flowed from an upper part to a lower part, thereby the upper part of the indoor heat exchanger is operated as a condensor and the lower part of the indoor heat exchanger is operated as an evaporator. Indoor air passed through the indoor heat exchangers 2 and 3 is heated at the upper part and dehumidified at the lower part, they are mixed within the same air circuit in an indoor device and then blown out. As a result, it is possible to dehumidify the air while preventing a reduction of the indoor air temperature. In addition, one valve is provided with two functions of a metering state and a fully opened state and thus it becomes possible to simplify a constitution of the main body.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to an air conditioner that can operate to dehumidify while preventing a drop in room temperature.

Prior Art The conventional technology will be explained below with reference to FIGS. 3 and 4.

First, the configuration of the refrigeration cycle will be explained based on FIG.

In FIG. 3, during normal cooling operation, the two-way valve 7 is (
(energized) open, two-way valve 8 (non-energized), indoor heat exchanger 2
．． 3 are operated as evaporators, and outdoor heat exchanger 4 is operated as a condenser.

Next, when dehumidifying while preventing a drop in room temperature, the two-way valve 7 is closed, the two-way valve 8 is (energized), and the indoor heat exchanger 2 is the evaporator, and the indoor heat exchanger 3 is the evaporator. and the outdoor heat exchanger 4 are both operated as a condenser.

Next, the structure of indoor unit A will be explained using FIG. 4.

In the figure, indoor air is sucked in through a front grille 13, passes through indoor heat exchangers 2 and 3, and is blown out by a crossflow fan 11. Here, the indoor heat exchanger is arranged as the indoor heat exchanger a2 and the indoor heat exchanger 3 from the windward side. By using the indoor heat exchanger 2 as an evaporator and the indoor heat exchanger 3 as a condenser, the indoor air that has passed through the evaporator, has been dehumidified and has become low temperature, is reheated by the downstream A condenser, This prevented the temperature of the blowing air from dropping.

In order to adopt the above-mentioned configuration, the indoor heat exchanger had two rows of refrigerant flow paths, and the refrigerant pipes had one path from the inlet to the outlet.

Problems to be Solved by the Invention However, the above conventional configuration has the following disadvantages.

Because the area where the evaporator and condenser are close to each other is large, when the air conditioner stops operating, the moisture remaining on the surface of the 7 generators is heated by the residual heat of the condenser and re-evaporates, causing indoor humidity to drop. It was inevitable that it would rise.

Further, since the flow rate adjusting device in which the two-way valve 7 and the capillary tube 5 are connected in parallel is provided, the volume occupied by the indoor unit A becomes large, and there are problems in that the storage capacity is poor and the cost is high.

In addition, when the two-way valve 7 is opened and the indoor heat exchangers 2 and 3 operate as evaporators, the refrigerant pipe passes through the heat exchanger in one route, so there is a large pressure loss, and normally This was causing a decrease in the cooling capacity of the air conditioner. This also appeared as a decrease in the heating capacity of models capable of heating.

Furthermore, since the indoor heat exchanger is configured such that the windward row is an evaporator and the leeward row is a condenser, the heat exchange ratio between the evaporator and the condenser can only be one to one.

In view of the above conventional problems, the present invention changes the configuration of the indoor heat exchanger, avoids re-evaporation of condensed water in the generator when the air conditioner is stopped, and further simplifies the configuration of the flow rate adjustment device. The purpose is to improve cash flow and keep costs low. Further, the present invention aims to reduce pressure loss during normal cooling operation and heating operation for models capable of heating, thereby preventing a decrease in capacity.

Furthermore, the present invention aims to arbitrarily set the ratio between the heat exchanger capacity as an evaporator and the heat exchanger capacity as a condenser, and to appropriately set the blowout temperature during dehumidification operation. It is something.

Means for Solving the Problems In order to solve the above-mentioned problems, the present invention provides a flow control system that conventionally consists of a two-way valve and a capillary tube. The adjusting device includes a valve movable part, a valve seat, and an electromagnetic actuating coil part, and a small hole is provided in the main body of the movable valve to communicate between the front and rear of the valve seat, and the communication is disconnected in two stages depending on whether or not the electromagnetic coil is energized. This is a two-way valve with a small hole whose area can be varied, and this two-way valve with a small hole is placed in the middle of the indoor heat exchanger, thereby dividing the indoor heat exchanger into an upper part and a lower part.

Further, in the present invention, the refrigerant pipes at the upper and lower portions of the indoor heat exchanger have two routes, respectively, by two rows on the windward side and the leeward side.

Furthermore, in the present invention, the throttle section is arranged above or below the middle stage of the indoor heat exchanger.

Function: With this configuration, by flowing the refrigerant from the upper part of the indoor heat exchanger to the lower part, the upper part of the indoor heat exchanger operates as a condenser, and the lower part operates as an evaporator.

EXAMPLE Hereinafter, an example of the present invention will be described with reference to FIGS. 1 and 2. Components that are the same as those in the conventional example are given the same reference numerals and description thereof will be omitted. First, the second
The structure of the two-way valve with a small hole will be explained with reference to the drawings.

In FIG. 2, 14 and 15 are the valve inlet and outlet.

Valve moving part! 6 is movable in the vertical direction, and its upper part 17 serves as a suction element. There is a coil 1 around the suction element.
8 is attached. Further, 19 is a valve seat. A contact portion 19 is attached to the upper portion of the valve movable portion. The small hole consists of a hole 21 and a vertical hole 22, and furthermore, an enlarged part 23 is provided near the exit.

Next, the operation of this embodiment will be explained. First, the state when the solenoid valve is fully open will be explained. In this case, when the coil 18 is energized, the valve movable part 16 is attracted to the attractor 17.

Next, a case where the refrigerant flow rate is adjusted (throttled) will be explained. In this case, the valve movable part 16 is in close contact with the valve seat 19, and the refrigerant passes through the horizontal hole 21 and the vertical hole 22.

Further, in this embodiment, since the horizontal hole 21 of the valve movable portion 16 is penetrated, it is not necessary to penetrate it in an L-shape as in the conventional case, and the workability is facilitated. Furthermore, by penetrating the horizontal hole 21, the refrigerant population is increased to 21 places, so even if the valve movable part rotates, a constant flow rate can always be obtained.

A two-way valve with a small hole having such a configuration is inserted as a flow rate regulating device into the middle stage of the indoor heat exchanger as shown in FIG.
The indoor heat exchanger 2.3 is divided into an upper part and a lower part, and by flowing the refrigerant from the upper part to the lower part, the upper part of the indoor heat exchanger 2.3 is operated as a condenser and the lower part is operated as an evaporator. Indoor heat exchanger 2
．． The indoor air that has passed through 3 is heated in the upper part, dehumidified in the lower part, mixed in the same air circuit in the indoor unit, and blown out.

As a result, dehumidification can be performed while preventing a drop in room temperature. This configuration has the following advantages.

Since the upper part is the condenser and the lower part is the evaporator, the condensed water in the evaporator can be drained without being heated by the amperage. Furthermore, the adjacent area between the evaporator and condenser can be significantly reduced compared to conventional technology. Since the air conditioner can be made small (as a result of this, it is possible to prevent re-evaporation of condensed water when the air conditioner is shut down).

Furthermore, by providing a horizontal hole 21 and a vertical hole 22 in the valve movable part 16 of the two-way valve 24, the main body structure can be simplified by providing two functions of a throttle state and a fully open state in one valve body. becomes.

In addition, by using two rows of piping on the windward side and the leeward side, the evaporator and condenser can be easily made into two routes, reducing pressure loss in the heat exchanger and reducing the heating and cooling capacity of the main unit. It is possible to prevent the decrease.

Furthermore, by dividing the indoor heat exchanger into an upper part and a lower part with a throttle part in between, the heat exchange ratio between the upper part and the lower part can be easily set to the optimum one based on the design, depending on the insertion position of the throttle part. It is easily possible to increase the dehumidifying capacity by setting the evaporator side large, or to perform a heating-like dehumidifying operation by setting the condenser side large and raising the blowout temperature above the suction temperature.

Effects of the Invention As is clear from the above embodiments, the present invention provides a valve body with small holes in the middle part of the divided indoor heat exchanger 1W to prevent condensed water from being recycled when the air conditioner is stopped. Evaporation can be prevented, and conventionally, a two-way valve and a capillary valve are installed in parallel to prevent flow. By using a two-way valve with a small hole as the flow rate adjustment device, the flow rate can be adjusted in two stages by opening and closing the valve body, allowing iJt!
The storage property of the adjustment device is improved, and the cost required for this can be reduced. In addition, it reduces the decrease in capacity during normal heating and cooling operation, and the ratio of the evaporator and a-condenser can be freely set according to the design, and the blowout temperature after dehumidification can be set arbitrarily. is possible

[Brief explanation of the drawing]

Fig. 1 is a sectional view of an air conditioner showing an embodiment of the present invention, Fig. 2 is a sectional view of a two-way valve with small holes used in the air conditioner, and Fig. 3 is an air conditioner showing a conventional example. A refrigeration cycle diagram of a conditioner, FIG. 4 is a sectional view of an indoor unit showing a conventional example. ■...Compressor, 2...Indoor heat exchanger (upwind side), 3...Indoor heat exchanger (leeward side)
, 4... Outdoor heat exchanger, 14... Valve inlet, 15... Valve outlet, 16... Valve moving part, 19... ...Valve seat, 21...Horizontal hole,
22... Vertical hole 24... Two-way valve with small hole. Name of agent: Patent attorney Shigetaka Awano and one other person? −Indoor excursion

Claims (3)

[Claims] (1) A refrigeration cycle is constructed by connecting a compressor, an outdoor heat exchanger, a throttle device, and an indoor heat exchanger, and the indoor heat exchanger is arranged in a stage direction with a plurality of horizontal pipes through which refrigerant flows. The ends of these horizontal pipes are connected to each other to form a series of refrigerant circulation circuits, and a two-way valve is installed in the middle of the refrigerant circulation circuit of the indoor heat exchanger to divide the refrigerant circulation circuit into two. An air conditioner in which the two-way valve is configured with a valve movable part, a valve seat, and an electromagnetic actuating coil, and a small hole is provided in the movable valve body to serve as a flow rate adjustment device. (2) The air conditioner according to claim 1, wherein at least one of the bisected refrigerant circulation circuits of the indoor heat exchanger has two paths. (3) The air conditioner according to claim 1 or 2, wherein the refrigerant circulation circuit of the indoor heat exchanger divided into two halves is the same length or one of them is lengthened.