JPH0328583A - Branching valve - Google Patents

Abstract

PURPOSE:To economically operate an airconditioner by flowing with equal flow rates of refrigerant through tow introduction ports when a communication port is in the center of circumferential angle of the two introduction ports, causing difference in the opening areas with the rotation of a stepping motor to cause difference in the flow rates, and branch flowing refrigerant as required according to the refrigerant requirement of an indoor machine with the motor. CONSTITUTION:When the refrigerant requirement of an indoor machine changes according to the room temperature, flow rate of a fan, etc., and more refrigerant is required on the indoor heat exchanger 22 side, a rotor 3 of a stepping motor 12 is rotated with a signal of a control circuit 27 by a required amount, and a valve body 7 is rotated counterclockwise. Here, the depth of groove is deeper at an introduction port 2a and shallower at an introduction port 2b and the refrigerant flow rate can be changed according to the respective opening areas. As either of the raised stop 8b or 8a is stopped with a stop 10 of a cap, either of the introduction ports 2a and 2b may be closed by rotating the valve body 7 clockwise or counterclockwise to flow all the refrigerant to one indoor heat exchanger.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a flow divider valve mainly used in a refrigerant circuit of an air conditioner.

[Prior art 1] As shown in Fig. 6, in a multi-type air conditioner using two indoor units with one compressor 2o, compression 120
The refrigerant discharged from the outdoor heat exchanger 21 passes through the T-shaped piping and the cabillary tube 25, and then reaches the indoor heat exchanger 22.
And sent to 23 and compressed! [Returning to the suction port of No. 20, I am inspecting the refrigerant circuit. In the above refrigerant circuit, the branch flow to the two indoor heat exchangers is carried out by the -'' shaped piping, but the respective indoor heat exchangers 522 and 23 are
changes depending on the room temperature and the II of the air conditioning fan 24 of the indoor unit, and especially when there is a large difference in the cooling 1'g1 demand, the refrigerant flow vessel is not in the T-shaped pipe but in the cabillary tube on the side with the larger refrigerant demand. 25, the amount of refrigerant flowing to the indoor heat exchanger on the other side was reduced, causing problems such as not being able to divide the flow accurately and causing severe fluctuations in gas pressure. .

Means for Solving Problem E] The present invention fixes a flat valve seat having two conduction ports on the circumference separated from the inlet at a required angle to a cylindrical valve box provided with an inlet. A flat lid with a cylindrical part containing a stepping motor rotor is fixed to the opposite end of the valve seat of the cylindrical well box, and a communication port is provided at one place on the circumference inside the valve box, and a communication port and two are provided on the flat surface of one end. A shallow arc-shaped groove is formed in the direction of the two conductive ports, and a convex part of the stopper is provided on the opposite plane of the groove.The valve body is inserted by touching and pressing the convex part provided on the lid. It is provided so as to be rotatable with respect to the valve seat and to limit its rotation to l+1, and furthermore, a wall with a rack cut in a part is provided on the outer periphery of the plane opposite to the groove, and it engages with a pinion fixed to the shaft of the rotor. To provide a diversion valve comprising a valve body configured as follows.

[Operation] In the above configuration, when the position of the communication port of the valve body is at the center of the circumferential angle of the two communication ports, the depths of the grooves of the two communication ports are the same, so the opening areas are equal and the amount of water is the same. refrigerant can flow. In this situation, by rotating the rotor of the stepping motor, the valve body that engages with the pinion of the rotor rotates, and by rotating the valve body by a predetermined angle, the depth of the groove of each communication port is increased on one side and on the other side. This makes it possible to change the opening area and make a difference in the cold Ixam. In addition, if the convex stopper of the valve body and the convex part of the lid are rotated to the point where they touch, one of the communication ports will be blocked by the flat part of the valve rest, and the other communication port and the communication port of the valve body will be closed around the circumference. The position is the same as above, and it is possible to flow all the refrigerant.

[Miryu PA1 Examples will be described below with reference to the drawings.

A cylindrical valve box 1 is provided with an inlet 1a, and two conductive ports 2a and 2b are provided at one end of the valve box 1 at a required angularly symmetrical distance from the inlet 1a (90° in FIG. 2). At the other end of the valve box, a flat plate N5 having a case 4 with a built-in port 3 of a stepping motor 12 is fixed at one end of the case 4. A bearing cover 6 is fixed to the bearing cover 6. Inside the valve box 1, a communication port 7a is provided at one location on the outer periphery, and a communication port 7a is provided on the lower side surface.
An arc-shaped lI7b is provided which becomes shallower in the circumferential direction from a toward the conduction ports 2a and 2b, and a wall 7d in which a rack is carved inward on a part of the inner periphery is provided on the upper side surface portion on the opposite side from the groove. On this 17d, an I-shaped valve 7 having convex stoppers 8a and 8b corresponding to the positions of the communication ports and having a shaft 9 in the center is rotatably arranged. A bearing 9a is fixed to the center of the lid 5, and the valve body 7 is supported via a shaft 9. In addition, a stopper 10 is fixed to one location of l5, and the stopper 10 and convex stoppers 8a and 8b
are in contact with each other to limit the rotation angle of the valve rest 7. At one end of the shaft of the rotor 3 of the stepping motor 12,
The pinion 11 is fixed and meshes with the rack 7C of the valve body 7.

Next, its effect will be explained. The introduction port 1a is connected to an outdoor heat exchanger 21, and the conduction ports 2a and 2b are connected to indoor heat exchangers 22 and 23, respectively (FIG. 5). Now, if the refrigerant demand of each indoor unit is equal,
Communication port 7aG. t3j1 Conduction ports 2a and 2b are located on an extension of the population 1a and are opened by an arcuate groove 7b.
have the same opening area, the indoor heat exchangers 22 and 23 are connected through the respective communication ports 2a and 2b.
The same amount of refrigerant as U is flowing. Next, if the refrigerant requirement of the indoor unit changes depending on the indoor temperature, fan ventilation, etc., and for example, more refrigerant is required on the indoor heat exchanger 22 side,
The stepping motor 12 rotates the rotor 3 as required by the signal 0 from the control circuit 27, and rotates the valve body 7 counterclockwise as seen in FIG. At this time, the depth of the groove is
The refrigerant Rm can be changed depending on the area of each opening. Also,
By rotating the valve body 7 clockwise or counterclockwise until the convex stopper 8b or 8a of the valve body 7 contacts the stopper 10 of the lid, the conduction port 2a or 2b is opened, respectively.
It is also possible to block one of the indoor heat exchangers and allow all the refrigerant to flow to one indoor heat exchanger.

[Effect 1] The present invention has the above-mentioned configuration, and unlike the conventional T
Instead of dividing the refrigerant with the double pipe 26, the cooling II of the indoor unit
Depending on the mold requirement, it is possible to eliminate the stepping motor, and economical operation of the air conditioner is possible. Also,
When the amount of shunt does not change (L), it is economical because the power to the stepping motor can be stopped.

[Brief explanation of drawings]

FIG. 1 is a longitudinal sectional view of one embodiment of the diverter valve of the present invention, and FIG.
The figure is a cross-sectional view of the device in Figure 1, Figures 3 and 4 are perspective views showing the upper and lower surfaces of the valve body in Figure 1, and Figure 5 is a cross-sectional view of the device in Figure 1.
FIG. 6 is a circuit diagram showing a refrigerant circuit using a diversion valve. FIG. 6 is a circuit diagram showing a refrigerant circuit according to the prior art. DESCRIPTION OF SYMBOLS 1... Cylindrical valve box, 1a... Inlet, 2... Planar valve seat, 2a. 2b... Conduction port, 3... Rotor, 4
...Case, 5...Flat plate lid, 6...Bearing cover, 7
... Valve body, 7a... Communication port, 7b... Arc-shaped groove, 7G... Rack, 7d... Wall, 8a, 8b...
Convex stopper 9...Shaft, Mi-bearing, 10...
・Stopper 11...on, 12...stepping motor 20...compressor, 21...outdoor heat exchanger, 22.23...indoor heat exchanger, 24...fan, 25... Capillary tube, 26... T-tube,
27...Control circuit.

Claims (1)

[Claims] (1) In a diverter valve having a cylindrical valve box, the valve box has an inlet and two communication ports at one end located symmetrically on the circumference from the inlet. A valve seat is fixed, and a case containing a stepping motor rotor is fixed to the other end, and a lid with a convex portion projecting inward is fixed, and inside the valve box, A communication port is provided at one location of the cylinder on the outer periphery, and an arc-shaped groove that becomes shallower in the circumferential direction toward the two communication ports is provided on one end plane to communicate the communication port and the two communication ports. A wall with a rack cut into a part of the outer periphery is disposed on the other end plane, and a cylindrical valve body with convex portions provided on both ends of the wall is arranged rotatably with respect to the valve seat, and the lid and the wall are arranged so as to be rotatable with respect to the valve seat. One of the convex portions is arranged so as to abut when the communication port of the valve body and either of the two conduction ports are at the same position on the circumference, and the rack of the valve body is located at one end of the rotor. A diverting valve characterized by being engaged with a pinion fixed to the valve.