JPH0972447A - Control valve - Google Patents

Abstract

PROBLEM TO BE SOLVED: To combine a four-way valve which switches flow passages for a refrigerant at the time of cooling and heating in a heat pump type refrigerant circuit, a motor-driven valve which functions as expansion valve, and a two-way valve which is used for the on-off control of a bypass circuit in a refrigerating cycle. SOLUTION: This control valve, which is constituted of a motor-driven valve A section, a four-way valve B section, and a transmission device C section that transmits rotation at the positions just before the valve port of the motor- driven A section opens fully and closes fully, is provided with a through-hole 58 for mounting a bypass pipe 59 fitted in the middle as well as a plurality of openings formed on the concentric circle of a valve seat 37 in the conventional four-way valve B section. At the lower part of a valve disc 39, the second valve disc 51 is stored which is constituted of a delay jointing part by forming the opening 24a, and a through hole 60 is formed which communicates the opening 24a with a hole 22 at the upper part of the valve disc 39. The second valve disc 51 is constituted so as to delay-interlock with the transmission device C section and the valve disc 39 at prescribed angles respectively.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a four-way valve for switching a refrigerant flow passage during cooling and heating in a heat pump type refrigerant circuit, an electric valve functioning as an expansion valve, and an on / off circuit for a refrigeration cycle bypass circuit. The present invention relates to a control valve in which a two-way valve used for off control is combined and integrated, and in particular, a four-way valve and a two-way valve are operated separately by utilizing a driving force of an electric valve.

[0002]

2. Description of the Related Art First, FIG. 11 shows Japanese Patent Application No. 6-270.
381 shows the structure of a prior art control valve Z disclosed in No. 381. The structure of the control valve Z is a six-way valve, which is roughly divided into three parts: an electric valve A, a four-way valve B, and a transmission device C that connects the electric valve A and the four-way valve B.

The first structure of the motor-operated valve A is as follows: A cylindrical case 1 made of a non-magnetic material having an upper portion having a large diameter portion 1a is provided with a chamber 17 in the center and a propulsion bearing in the upper center of the chamber. 7 is provided and a valve opening 8 is provided at the lower portion, and a valve body 6 having openings 18 and 19 at the chamber side portion and the lower portion is arranged.
Further, an inlet / outlet pipe 21 is provided in the opening 20 below the lower valve opening 8.
Is provided.

A stator coil 2 is provided on the outer periphery of the lower part of the case 1, and a rotor 5 of a motor integrally formed with the upper part of a screw shaft 4 having a needle valve 3 at the tip thereof inside thereof.
The screw shaft 4 is converted into linear motion by a propulsion bearing 7, and the needle valve 3 is inserted into a valve port 8 at a lower portion of the valve body 6.
The opening degree of the valve port 8 is controlled by contacting and separating the ribs, and a rib-shaped convex portion 9 protrudes from the inner peripheral surface of the upper half portion of the rotor 5 at only one position in the center direction. It has been formed.

The second structure of the four-way valve B is as follows. As shown in FIG. 12, four openings 33, 34, 35 are provided at the upper end of the large diameter portion 1a of the upper portion of the cylindrical case 1 made of a non-magnetic material.
A metal disc-shaped valve seat 37 having concentric circles 36 at equal intervals is fixed, and a plastic thick disc-shaped valve body 39 is slidably rotatable on the lower surface of the valve seat 37. It was done.

The four openings 33, 34, 3 of the valve seat 37
5 and 36 have a predetermined angle (90
°) Introducing openings 33 at intervals, and openings 3 at positions facing this.
4 is an outlet, and openings 35 and 3 are arranged orthogonally to these.
6, an inlet pipe 40 is provided on the upper surface of the inlet 33, an outlet pipe 41 is provided on the outlet 34, and a through hole 35 is provided.
And 36 are provided with through-hole pipes 42 and 43, respectively.
Only at the lower part of 3 is a stopper 44 made of a pipe provided in a small projecting shape.

Further, the thick disc-shaped valve body 39 made of plastic is provided with a through hole 45 at a position corresponding to the inlet 33 and the through hole 35 of the valve seat 37, as shown in FIG. 12B. And 4
6 is provided, and a communication hole 47 (see FIG. 13A) that connects both through holes 45 and 46 is provided in the lower half part thereof, and the lead-out port 34 and the through-hole are provided at positions corresponding to the lead-out port 34 and the through-hole 36. An airtight communication hole 48 (see FIG. 13 (B)) that airtightly connects the 36 is provided, and the lower portions of both of these communication holes 47, 48 are formed in a plane arc shape, and the communication state is cut at each adjacent opening. It is supposed to be replaced.

Further, as shown in FIG. 11, the thick disc-shaped valve body 39 is provided with a hole 22 at the center of the upper surface thereof, and the valve body 39 is seated in the hole 22 by the pressure of the refrigerant during operation. 37
A compression coil spring 23 having a pressure weaker than the pressure applied to it is provided, a boss 24 is provided on the lower surface side of the valve body 39 on the opposite side, and internal teeth 25 are formed at the center thereof.

Third, as shown in FIG. 11, the transmission device C portion is an intermediate portion of the cylindrical case 1 made of the non-magnetic material, that is, the rotor 5 of the electric valve A portion and the valve of the four-way valve B portion. Body 29
When the valve opening 8 of the motor-operated valve A reaches the position immediately before full opening and the position immediately before fully closing, the delay transmission means 1 is provided.
The rotation is transmitted to the valve body 39 of the four-way valve via 6 and the engaging means 30.

That is, a guide bush 26 is caulked and fixed in the cylindrical case 1, and a connecting rod 28 having a flange 27 at an upper portion is air-tightly and rotatably supported at the center of the guide bush 26. External teeth 29 meshing with the internal teeth 25 at the center of the lower surface of the valve body 39 are formed at the upper end of the valve body 39, and the engagement means 30 is formed by the internal teeth 25 and the external teeth 29.

Below the connecting rod 28, a delay transmission means 16 is provided, which penetrates the guide bush 26 and has a coil having projecting pieces 14, 15 on the upper and lower sides. That is, the lower end of the connecting rod 28 extends to the inner surface of the upper half of the rotor 5, and the flange 11 is provided at the tip thereof.

The guide bush 26 of the connecting rod 28
A stopper 13 having a hanging stopper piece 13a at its outer tip is fixed to a slightly lower position.
3 and the flange 11 at the lower end,
6. As shown in FIG. 17, a delay transmission means 16 is provided rotatably, in which the upper and lower ends of a coil of a predetermined length are extended substantially parallel to the tangential direction as an upper protruding piece 14 and a lower protruding piece 15. The tip of the upper projecting piece 14 of the delay transmission means 16 can come into contact with the stopper piece 13a, and the tip of the lower projecting piece 15 is directed inwardly formed on the inner surface of the upper half of the rotor 5. It can come into contact with the convex portion 9.

Next, the operation (operation) of the conventional control valve will be described. As shown in FIG. 11, when the needle valve 3 of the motor-operated valve A is in the closed state, as shown in FIGS.
When the through holes 45 and 46 in the valve body 39 of the four-way valve B portion are in the heating state corresponding to the introduction hole 33 and the through hole 35 of the valve seat 37, as shown in FIGS. 16 and 17 (A). In plan view, one side surface (upper surface) of the convex portion 9 of the rotor 5 is on the outer surface (lower surface) of the protruding piece 15 below the delay transmission means 16, and
The outer surface (upper surface) of the upper protruding piece 14 is the stopper piece 13a.
The upper and lower projecting pieces 14 and 15 are in contact with the outer side (lower surface) of the and are sandwiched by the convex portion 9 and the stopper piece 13a.

In this state, the valve seat 37 and the valve body 39
As shown in FIG. 14, the four-way valve B part has a valve seat 37
Stopper 44 protrudingly provided on the lower surface of the inlet 33
Is at a position corresponding to the through hole 45 of the valve body 39. Therefore, as shown in FIG. 13A, the introduction port 33 and the through hole 35 are in communication with each other through the communication hole 47, and as shown in FIG. 9, the refrigerant discharged from the discharge port of the compressor F is Introductory pipe 40
→ Inlet port 33 → Communication hole 47 → Indoor heat exchanger E through the through-hole pipe 42, and the inlet / outlet pipe 19 of the motor-operated valve A → Valve port 8 →
1 through the inlet / outlet pipe 21 and the outdoor heat exchanger D.
As shown in FIG. 2 (B), it returns to the compressor F through the through hole pipe 43, the through hole 36, the airtight communication hole 48, the outlet 34, and the outlet pipe 41.

When the stator coil 2 of the motor-operated valve A is energized so as to rotate in the valve closing direction in this heating state, the rotor 5 of the motor shown in FIGS. As shown in FIG. 17B, when the protrusion 9 of the rotor 5 is separated from the lower protruding piece 15 of the delay transmission means 16 and rotated about one turn, the lower protruding piece 1 is rotated as shown in FIG. 17B.
5 inside (upper surface).

Subsequently, when the rotor 5 rotates, the projecting piece 15 below the delay transmission means 16 is pushed by the convex portion 9 of the rotor 5 and rotates leftward with the projecting piece 14 above.
As shown in FIG. 17C, the rotor 5 rotates until the upper protruding piece 14 contacts the rear surface (upper surface) of the sputter piece 13a. During about two rotations of the rotor 5 between FIGS. 17 (A) to 17 (C), due to the idle rotation of the coil in the delay transmission means 16, it is not transmitted to the connecting rod 28. Therefore, during this period, the opening area of the valve port 8 can be changed by the vertical action of the needle valve 3 by the screw shaft 4, and the heating operation can be performed at the position of the optimum throttle degree.

Next, when it is desired to switch to the cooling operation, FIG.
When the rotor 5 is further rotated leftward from the state of 7 (C), the upper protruding piece 14 pushes the stopper piece 13a integrally fixed to the connecting rod 28, and FIG.
Since the connection rod 28 starts rotating, the rotation is transmitted to the valve body 36 of the upper four-way valve B portion. As a result, the valve body 39 moves from the state of FIG. 14 to the state of FIG.
Rotate ° and switch to cooling operation.

When switching from the heating operation to the cooling operation, the valve body 39 is rotated by 90 degrees.
The stopper 44, which was in contact with the outer end of the inner edge of the communication hole 47 on the side of the through hole 45, comes into contact with the outer end of the inner edge of the communication hole 47 on the side of the through hole 46 as shown in FIG.

The switching of the valve body 39 causes the airtight communication hole 48 to airtightly communicate between the outlet hole 34 and the communication hole 35, so that the refrigerant discharged from the discharge port of the compressor F is
Introducing pipe 40 → Introducing port 33 → Communicating hole 47 → Passing hole 36 → Introducing into the outdoor heat exchanger D via the guiding pipe 43, through the inlet / outlet pipe 21 of the control valve → Valve 8 → Inlet / outlet pipe 19, the indoor heat exchanger After passing through E, it returns to the compressor F through the through hole pipe 42, the through hole 35, the communication hole 48, the outlet 34, and the outlet pipe 41.

In this cooling operation, that is, in order to obtain the optimum throttle degree in the state of FIG. 17D, the stator coil 2 is energized so that the needle valve 3 rotates in the valve closing direction. As a result, on the principle opposite to the above, the rotor 5 of the motor does not make contact with the delay transmission means but makes one full rotation in the right direction opposite to the arrow when viewed from the top, and the convex portion 9 of the rotor is Delay transmission means 16
It hits the opposite side of the protruding piece 15 below. Then rotor 5
When is rotated, the protruding piece 15 below the delay transmission means 16 is pushed by the convex portion 9 of the rotor sleeve and rotated to the right,
The rotor 5 rotates until the upper protruding piece 14 comes into contact with the stopper piece 13. During this time, the opening area of the valve opening 8 can be changed by the vertical movement of the needle valve 3 by the screw shaft 4, and the cooling operation can be performed at the position of the optimum throttling degree.

When it is desired to switch to the heating operation again, when the stator coil 2 is energized so that the needle valve 3 further rotates in the valve closing direction, the protruding piece 14 above the delay transmission means 16 contacts the stopper piece 13a. The connecting rod 28 rotates in the counterclockwise direction in FIG. 17, and the valve element 39 moves from the state of FIG.
It turns 90 degrees to the state of and switches to heating operation.

On the other hand, FIG. 10 shows the structure of a conventional two-way valve used for on / off control of a bypass circuit of a refrigeration cycle. The structure of the two-way valve G includes a valve main body 101 having a valve seat 103 at the center of the lower part thereof and refrigerant inflow / outflow pipes 104 and 105 at the side and the lower side thereof, and an upper part of the valve main body 101. A plunger 107 made of a magnetic material having a valve body 106 at a lower end slidably inserted in a plunger tube 110 made of a non-magnetic material, and a spring 108 above the plunger 107 via a spring 108. A suction element 109 made of a magnetic material fixed to the upper end of the plunger tube 110,
The coil 112 is arranged around the plunger tube 110, and the electromagnet 111 is formed by a yoke 113 made of a U-shaped magnetic material and surrounding the coil 112. In the figure, reference numeral 102 denotes a fixing screw for fixing the yoke 113 and the suction element 109.

Subsequently, the operation (actuation) of the conventional two-way valve
Will be described. When power is not supplied to the coil 112 of the electromagnet 111, the valve body 106 of the plunger 107 is pressed against the valve seat 103 by the action of the spring 108, and the two-way valve is in a closed state.

Next, when the coil 112 of the electromagnet 111 is energized, the plunger 107 is attracted by the attraction element 109 against the force of the spring 108 by the action of the magnetic field generated inside, and the valve 106 is moved from the valve seat 103. The separation causes the two-way valve to open.

FIG. 9 is a circuit diagram in which a general heat pump type refrigeration cycle is provided with a bypass circuit H called a hot gas defrost type for the purpose of defrosting the outdoor heat exchanger D. In the bypass circuit H, A two-way valve G is provided between the outlet side of the compressor F and the outlet side of the indoor heat exchanger E, that is, the inlet side of the motor-operated valve section A, and the two-way valve G is closed during normal heating operation. Set the valve state and transfer the refrigerant from the compressor F to the introduction pipe 40.
→ Four-way valve B → through-hole pipe 42 → indoor heat exchanger E → electric valve A → outdoor heat exchanger D → through-hole pipe 43 → four-way valve B → outlet pipe 41 → compressor F to circulate Then, in the defrosting operation, the two-way valve G is opened, and the refrigerant is compressed from the compressor F → two-way valve G → motorized valve section A → outdoor heat exchanger D → through hole tube 43 → four-way valve section B.
The outlet pipe 41 is circulated to the compressor F, and the high-temperature and high-pressure refrigerant discharged from the compressor F is directly sent to the outdoor heat exchanger D for defrosting.

The reason for providing such a bypass circuit H is that when the outside air temperature becomes 0 ° C. or less during the heating operation, moisture in the air condenses on the fins of the outdoor heat exchanger D and becomes frost and adheres. Therefore, the heat transfer effect of the outdoor heat exchanger D is reduced, and the efficiency (heating efficiency) of the refrigeration cycle is significantly reduced, so that defrost must be performed.

[0027]

In the above-mentioned prior art, in the specification form of the control valve and the two-way valve in the circuit of the refrigeration cycle shown in FIG. 9, the independent driving devices are used for driving. There were the following problems. Space was required for installing the control valve and the two-way valve, respectively. The motor stator coil 2 for operating the control valve and the electromagnet 37 for operating the two-way valve are individually required to be electrically driven, resulting in a high cost. Two controllers, one for the control valve and the other for the two-way valve, are required, and lead wires for connecting these controllers and the valve are required, resulting in high costs. The two-way valve had to be energized continuously while the valve was open, requiring an extra electricity bill.

[0028]

The control valve of the present invention comprises an electrically operated valve A section which functions as an expansion valve, and a four-way valve B section which functions to switch the flow path of the refrigerant during cooling and heating. In the conventional control valve, a two-way valve having a function of opening and closing the flow path of the refrigerant used for the bypass circuit H of the refrigeration cycle is integrally provided between the transmission device C portion and the valve body 39, and The drive source (stator coil 2) is capable of controlling three functions.

That is, the control valve according to the present invention rotates the rotor 5 in the case 1 by energizing the stator coil 2 on the outer periphery of the case 1 made of a non-magnetic material.
The needle valve 3 at the tip of the screw shaft is moved up and down via a screw shaft 4 integrally provided below the center of the case 1 to control the opening degree of a valve port 8 below the valve body 6 provided at the lower end of the case 1. An electric valve A portion and a metal disk-shaped valve seat 37 having at least three openings provided concentrically are provided at the upper end of the case 1.
7 is slid and rotated on at least two of the three openings.
And the other one opening are opened, and a four-way valve B portion is formed of a plastic valve body 39, the rotor 5 of the motor-operated valve A portion and the valve body 39 of the four-way valve B portion. The valve opening 8 of the motor-operated valve A portion is formed by a transmission device C portion that transmits rotation at a position immediately before fully opening and a position immediately before fully closing, and the rotational force of the rotor 5 of the motor-operated valve A portion. In the control valve which interlocks the throttle opening / closing of the valve opening 8 of the motor-operated valve A and the flow path switching by the rotation of the valve body 39 of the four-way valve B, the valve seat 37 of the four-way valve B is used. Has at least 3
One opening is provided on the concentric circle, a through hole 58 is provided at the center, a bypass pipe 59 is provided in the through hole 58, and a plate-like locking piece 56 is provided on the wall surface of the opening 24a in the inner surface of the boss 24 below the valve body 39. And a through hole 60 for communicating the opening 24a with the hole 22 in the upper portion of the valve body 39, and the upper half portion of the second valve body 51 inserted into the opening 24a is cut out in a fan shape. The delay connecting portion 53 is provided, and further, the inner teeth 52 are provided at the center of the lower half portion, and the delay connecting portion 53 of the second valve body 52 and the locking piece 56 provided on the wall surface of the opening 24a are used to provide the first portion. The two-valve element 51 delays and interlocks with the transmission device C section and the valve element 39 at a predetermined rotation angle, and the valve seat 37
And a second valve seat 57 formed on the lower surface of the valve body 39 and communicating with a through hole 58 provided in the control valve.

[0030]

BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of the present invention will be described in detail with reference to FIGS. Note that the same reference numerals are used for the same components as the control valve Z of the related art. As shown in FIG. 1, the control valve of the present invention has the same structure as that of the control valve of the prior art since the transmission device C and the motor-operated valve A below the external teeth 29 have the same structure as the prior art. Detailed description is omitted. Further, in the four-way valve B, the structure relating to the function of switching the flow path of the refrigerant during cooling and during heating is the same as that of the prior art, and a detailed description thereof will be omitted.

Regarding the part of the four-way valve B in the control valve of the present invention, the following new items are added.
As shown in FIGS. 1 and 2, in the valve seat 37 of the four-way valve B, at least three openings are provided concentrically as in the conventional product, and a through hole 58 is provided in the center of the valve seat. The
A bypass pipe 59 is connected to the through hole 58. The bypass pipe 59 is connected between the electric valve A portion and the outdoor heat exchanger D in FIG.

The plastic valve body 39 is provided with the introduction port 33, the through hole 35, and the through holes 45 and 46 as in the case of the conventional product, and the lower half portion thereof is a communication hole connecting the both through holes 45 and 46. An airtight communication hole 48 that airtightly connects 47 and the outlet 34 and the through hole 36 is provided. Also, the valve 39
A hole 22 for inserting the compression coil spring 23 is provided at the center of the upper surface of the.

In addition to the above structure, the valve body 39 of the present invention has a boss 24 under the valve body 39 as shown in FIG.
An opening 24a is provided on the inner surface of the plate, and a plate-like locking piece 56 is provided so as to face the wall surface of the opening 24a so as to project in the axial direction as shown in FIG. 2B. Further, the valve body 39
A through hole 60 for communicating the upper hole 22 (see FIG. 4A) with the opening 24a is provided, and a second valve seat 57 is formed at the lower end of the through hole 60.

The second valve body 52 is inserted into the opening 24a to form a slide type on-off valve.
Only the lower half of the valve body 51 has a smaller diameter than the opening 24a, and as shown in FIG. 3 (A), the upper half is cut out in a fan shape to provide a butterfly-shaped delay connecting portion 53. Further, the upper end surface of the second valve body 52 is formed in a flat shape to form a valve seal portion 54. Further, the second valve body 5
At the center of the lower half of 2, the inner teeth 52 that mesh with the outer teeth 29 arranged at the upper part of the transmission device C are provided, and the outer teeth 29 and the inner teeth 52 are used to engage means. The configuration of 60 is exactly the same as the conventional one.

In the control valve of the present invention constructed as described above, the second valve body 51 is provided with the delay connecting portion 53 of the second valve body 52 and the plate-like locking piece 56 provided on the wall surface of the opening 24a. The second valve seat 5 provided on the valve seat 37 by delaying and interlocking with the transmission device C portion and the valve body 39 at a predetermined rotation angle.
7 is opened and closed with a delay, and then the valve body 39 of the four-way valve B part
Is rotated. That is, the basic structure of the conventional control valve Z is a six-way valve, whereas the basic structure of the control valve of the present invention is a seven-way valve.

Next, the operating principle of this embodiment will be described with reference to FIGS. First, in the heating operation, the positional relationship between the valve seat 37 and the valve body 39 of the four-way valve B and the open / close valve state of the second valve body are as shown in FIG. And the through hole 35 are communicated with each other, and the airtight communication hole 48
With the through hole 36 and the outlet hole 34 communicated with each other, the second valve body 51 is closed.

Next, when the heating operation is switched to the cooling operation, as shown in FIG. 8 (A), the motor-operated valve A portion controlled between the rotational positions (C) to (D) during the heating operation is operated. While the rotor 5 is in the process of switching to the cooling operation, the rotor 5 first proceeds to the position (e), opens the second valve body 51 as shown in FIG. 5 (B), and further to the position (f). Go to Figure 5 (C)
As shown by, the communication hole 47 connects the inlet 33 and the communication hole 36, and the airtight communication hole 48 connects the communication hole 35 and the discharge hole 3.
The four-way valve B is switched to a state in which 4 and 5 are communicated with each other, and finally, the position returns to the position (b), the second valve body 51 is returned to the closed state as shown in FIG. 5 (D), and then the cooling is performed. Move to driving.

When switching from the cooling operation to the heating operation again, as shown in FIG. 8 (B), the motor-operated valve A portion controlled between the rotational positions (C) to (D) during the cooling operation is operated. The rotor 5 returns to the position (a), and as shown in FIG.
While the second valve body 51 is in the closed state, the communication port 47 communicates the inlet 33 and the communication hole 35, and the airtight communication hole 48 communicates the communication hole 36 and the discharge hole 34 with each other. After that, the heating operation is started.

On the other hand, when the heating operation is switched to the defrosting operation, as shown in FIG. 8 (C), the motor-operated valve section A controlled between the rotational positions (C) to (D) during the heating operation. Rotor 5 moves to the position of (e), and as shown in FIG. 6 (B),
The second valve body 51 is opened without switching the four-way valve B, and then the defrosting operation is started. During the defrosting operation,
The stator coil 2 is used to maintain the second valve body 51 in the open state.
It is clear from the principle of conventional control valves that there is no need to energize.

When the defrosting operation is switched to the heating operation again, as shown in FIG. 8D, the rotation of the motor-operated valve A which is controlled at the rotational position (e) during the defrosting operation. Child 5
However, it returns to the position of (B), and as shown in FIG. 6A, the second valve body 51 is returned to the closed state without switching the four-way valve B part, and then the heating operation is started.

As described above, in the control valve of the present invention, as shown in FIG. 7, by varying the rotational position of the rotor 5 of the electric valve A part, the throttle function of the valve opening 8 of the electric valve A part, Valve B
This makes it possible to control three functions, that is, the heating / cooling switching function of the valve body 39 of the portion and the opening / closing valve function of the second valve body 51 corresponding to the function of the two-way valve G. Further, the total number of steps of the rotor 5 and the value of the delay angle of the delay connection portion are not limited to those described in the related art and the present invention, and can be freely designed in consideration of the use application and cost. is there.

[0042]

The control valve according to the present invention is, as in the above-described embodiment, the motor-operated valve portion A which functions as an expansion valve and the four-way valve B which functions to switch the flow path of the refrigerant during cooling and heating. In a conventional control valve composed of two parts, a four-way valve B is integrally provided with a two-way valve that functions to open and close the flow path of the refrigerant used in the bypass circuit H of the refrigeration cycle, and one drive source (stator The coil 2) makes it possible to control three functions.

Therefore, the electromagnet in the two-way valve and most of the parts of the valve body are not required, so that it is very compact (space saving). Since the electromagnet in the two-way valve and most parts of the valve body are unnecessary, the manufacturing cost is reduced. Since the controller and the lead wire in the two-way valve are unnecessary, the manufacturing cost is reduced. The two-way valve function interlocks with the motor of the motor-operated valve A section having a self-holding function, so that it does not need to be energized during valve opening, thus eliminating the need for electricity. There is such an effect.

[Brief description of drawings]

FIG. 1 is a vertical cross-sectional view of an embodiment of a control valve of the present invention in a heating state.

FIG. 2 is an exploded perspective view of a valve seat, a valve body and a second valve body of the control valve of the present invention, (A) is a perspective view of the valve seat, (B) is a perspective view of the valve body, and (C). Is a perspective view of a second valve body.

FIG. 3 is an enlarged perspective view of a second valve body of the control valve of the present invention,
(A) is a perspective view seen from the valve seal portion side, and (B) is a perspective view seen from the internal tooth side.

FIG. 4 is an enlarged perspective view of a valve body of the control valve of the present invention,
(A) is a perspective view seen from the communication hole side, (B) is a perspective view seen from the delay connecting portion side.

FIG. 5 is a plan view for explaining the operating state of the delay connection portion of the control valve of the present invention and the opening / closing valve state of the second valve body at the time of switching between cooling and heating, and FIG. B)
And (C) are plan views showing states during heating operation switching, and (D) during heating operation.

FIG. 6 is a plan view for explaining an operating state of the delay connecting portion of the control valve of the present invention and an opening / closing valve state of the second valve body at the time of switching between heating and defrosting, and FIG. (B)
[Fig. 4] is a plan view showing a state during defrosting operation.

FIG. 7 is a graph chart showing the relationship between the rotational position of the rotor, the valve opening flow rate of the motor-operated valve, the valve body position of the four-way valve, and the open / close valve state of the second valve body.

FIG. 8 is a graph chart showing the relationship between the rotational position of the rotor, the valve body position of the four-way valve, and the open / close valve state of the second valve body when each operation mode is switched, and (A) is a heating operation →
The graph chart figure which shows the state at the time of switching of cooling operation, (B) cooling operation-> heating operation, (C) heating operation-> defrost operation, and (D) defrosting operation-> heating operation.

FIG. 9 is a refrigeration cycle diagram using a control valve and a two-way valve of the related art, in which a solid arrow indicates a refrigerant flow during a heating operation, and a dashed arrow indicates a refrigerant flow during a defrosting operation in the bypass circuit H. Indicates.

FIG. 10 is a longitudinal sectional view of a conventional two-way valve in a closed state.

FIG. 11 is a longitudinal sectional view of a conventional control valve in a heating state.

FIG. 12 is an exploded perspective view of a valve seat and a valve body of a conventional control valve, (A) is a perspective view of the valve seat, and (B) is a perspective view of the valve body.

13 is a cross-sectional view showing a state in which a valve seat and a valve body of a conventional control valve are combined, and FIG.
Sectional drawing, (B) is BB sectional drawing of FIG.

FIG. 14 is a plan view showing a positional relationship between a valve seat and a valve element during heating of a control valve according to a conventional technique.

FIG. 15 is a plan view showing the positional relationship between the valve seat and the valve element during cooling of the control valve of the conventional technique.

FIG. 16 is a partially cutaway perspective view of a prior art control valve delay coupling means.

FIG. 17 is a plan view for explaining an operating state of the delay coupling means of the conventional control valve at the time of switching between cold and warm, in which (A) is for heating and (B) to (C) are for the valve opening. When squeezing
(D) is a top view which shows the state at the time of heating.

[Explanation of symbols] A Motorized valve B Four-way valve C
Transfer device C Transfer device D Outdoor heat exchanger E
Indoor heat exchanger F Compressor G Two-way valve H
Bypass circuit Z Control valve 1 Case 2 Stator coil 3
Needle valve 4 Screw shaft 5 Rotor 6
Valve body 7 Propulsion bearing 8 Valve mouth 9
Convex part 10 Lid 11 Flange part 13a Stopper piece 13 Stopper 1
4 Upper protruding piece 15 Lower protruding piece 16 Delay transmission means 1
7 Chamber 18 Opening 19 Pipe 2
0 opening 21 pipe 22 hole 2
3 Compression coil spring 24 Boss 24a Opening 2
5 Inner teeth 26 Guide bush 27 Collar 2
8 Connecting Rod 29 External Teeth 30 Engaging Means 3
1 Valve Main Body 32 Cylindrical Case 33 Opening (Inlet) 3
4 Opening (outlet) 35 Opening (through hole) 36 Opening (through hole) 3
7 valve seat 38 compression coil spring 39 valve body 4
0 Inlet pipe 41 Outlet pipe 42 Through-hole pipe 4
3 Through-hole pipe 44 Valve body stopper 45 Through-hole 4
6 Through hole 47 Communication hole 48 Communication hole 5
1 2nd valve body 52 Internal tooth 53 Delay connection part 5
4 Valve seal part 55 Delay connection part 56 Locking piece 5
7 Second valve seat 58 Through hole 59 Bypass pipe 6
0 Engaging means 101 Valve body 102 Set screw 1
03 valve seat 104 inflow / outflow pipe 105 inflow / outflow pipe 1
06 Valve body 107 Plunger 108 Spring 1
09 Suction element 110 Plunger tube 1
11 electromagnet 112 coil 113 yoke

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[Procedure amendment]

[Submission date] July 10, 1996

[Procedure amendment 1]

[Document name to be amended] Statement

[Correction target item name] 0009

[Correction method] Change

[Correction contents]

Third, as shown in FIG. 11, the transmission device C portion is an intermediate portion of the cylindrical case 1 made of the non-magnetic material, that is, the rotor 5 of the electric valve A portion and the valve of the four-way valve B portion. Body 29
Provided between, when the valve opening 8 of the electric valve A portion is reached the position and full close straight before the fully open position immediately before the delay transmission means 16
The rotation is transmitted to the valve body 39 of the four-way valve via the engagement means 30.

[Procedure amendment 2]

[Document name to be amended] Statement

[Correction target item name] 0027

[Correction method] Change

[Correction contents]

[0027]

In the [0006] conventional art described above, in the use form of the control valve and the two-way valve in the circuit of the refrigeration cycle shown in FIG. 9, since those drives with each independent drive unit, There were the following problems. Space was required for installing the control valve and the two-way valve, respectively. The motor stator coil 2 for operating the control valve and the electromagnet 37 for operating the two-way valve are individually required to be electrically driven, resulting in a high cost. Two controllers, one for the control valve and the other for the two-way valve, are required, and lead wires for connecting these controllers and the valve are required, resulting in high costs. The two-way valve had to be energized continuously while the valve was open, requiring an extra electricity bill.

[Procedure 3]

[Document name to be amended] Statement

[Correction target item name] 0036

[Correction method] Change

[Correction contents]

Next, the operating principle of this embodiment will be described with reference to FIGS. First, in heating operation, four-way valve B
As shown in FIG. 5A, the positional relationship between the valve seat 37 and the valve body 39 and the open / closed valve state of the second valve body are shown in FIG. The second valve body 51 is in a closed state in a state where the through hole 36 and the outlet 34 are communicated with each other by the hole 48.

[Procedure amendment 4]

[Document name to be amended] Statement

[Correction target item name] 0037

[Correction method] Change

[Correction contents]

Next, when the heating operation is switched to the cooling operation, as shown in FIG. 8 (A), the motor-operated valve A portion controlled between the rotational positions (C) to (D) during the heating operation is operated. While the rotor 5 is being switched to the cooling operation, the rotor 5 advances to the position (e) , the second valve body 51 is opened as shown in FIG. 5 (B), and further to the position (f). As shown in FIG. 5 (C), the four-way valve B is placed in a state in which the introduction port 33 and the through hole 36 are communicated by the communication hole 47 and the through hole 35 and the discharge port 34 are communicated by the airtight communication hole 48. Switch, and finally,
Returning to the position of (b), as shown in FIG. 5 (D), the second valve body 51 is returned to the closed state, and then the cooling operation is started.

[Procedure Amendment 5]

[Document name to be amended] Statement

[Correction target item name] 0038

[Correction method] Change

[Correction contents]

When switching from the cooling operation to the heating operation again, as shown in FIG. 8 (B), the motor-operated valve A portion controlled between the rotational positions (C) to (D) during the cooling operation is operated. The rotor 5 returns to the position (a), and as shown in FIG.
In the state where the second valve body 51 is in the valve closed state, the communication port 47 communicates the introduction port 33 and the communication hole 35, and the airtight communication hole 48 communicates the communication hole 36 and the discharge port 34 with each other. After that, the heating operation is started.

[Procedure correction 6]

[Document name to be amended] Statement

[Correction target item name] 0041

[Correction method] Change

[Correction contents]

As described above, in the control valve of the present invention, as shown in FIG. 7, the rotational position of the rotor 5 of the motor-operated valve A is variable.
By doing so , three functions of the throttle function of the valve opening 8 of the motor-operated valve A, the heating / cooling switching function of the valve body 39 of the four-way valve B section, and the opening / closing valve function of the second valve body 51 corresponding to the function of the two-way valve G are provided. To be controllable. Further, the total number of steps of the rotor 5 and the value of the delay angle of the delay connection portion are not limited to those described in the related art and the present invention, and can be freely designed in consideration of the use application and cost. is there.

[Procedure amendment 7]

[Document name to be amended] Statement

[Correction target item name] 0043

[Correction method] Change

[Correction contents]

Therefore, the electromagnet in the two-way valve and most of the parts of the valve body are not required, which is very compact (space saving). Since the electromagnet in the two-way valve and most parts of the valve body are unnecessary, the manufacturing cost is reduced. Since the controller and the lead wire in the two-way valve are unnecessary, the manufacturing cost is reduced. The two-way valve function interlocks with the motor of the motor-operated valve A section having a self-holding function, so that it does not need to be energized during valve opening, thus eliminating the need for electricity. There is such an effect.

[Procedure amendment 8]

[Document name to be amended] Statement

[Correction target item name] Brief description of drawings

[Correction method] Change

[Correction contents]

[Brief description of drawings]

FIG. 1 is a vertical cross-sectional view of an embodiment of a control valve of the present invention in a heating state.

FIG. 2 is an exploded perspective view of a valve seat, a valve body and a second valve body of the control valve of the present invention, (A) is a perspective view of the valve seat, (B) is a perspective view of the valve body, and (C). Is a perspective view of a second valve body.

FIG. 3 is an enlarged perspective view of a second valve body of the control valve of the present invention,
(A) is a perspective view seen from the valve seal portion side, and (B) is a perspective view seen from the internal tooth side.

FIG. 4 is an enlarged perspective view of a valve body of the control valve of the present invention,
(A) is a perspective view seen from the communication hole side, (B) is a perspective view seen from the delay connecting portion side.

FIG. 5 is a plan view for explaining the operating state of the delay connection portion of the control valve of the present invention and the opening / closing valve state of the second valve body at the time of switching between cooling and heating, and FIG. B)
And (C) are plan views showing states during heating operation switching, and (D) during heating operation.

FIG. 6 is a plan view for explaining an operating state of the delay connecting portion of the control valve of the present invention and an opening / closing valve state of the second valve body at the time of switching between heating and defrosting, and FIG. (B)
[Fig. 4] is a plan view showing a state during defrosting operation.

FIG. 7 is a graph chart showing the relationship between the rotational position of the rotor, the valve opening flow rate of the motor-operated valve, the valve body position of the four-way valve, and the open / close valve state of the second valve body.

FIG. 8 is a graph chart showing the relationship between the rotational position of the rotor, the valve body position of the four-way valve, and the open / close valve state of the second valve body when each operation mode is switched, and (A) is a heating operation →
The graph chart figure which shows the state at the time of switching of cooling operation, (B) cooling operation-> heating operation, (C) heating operation-> defrost operation, and (D) defrosting operation-> heating operation.

FIG. 9 is a refrigeration cycle diagram using a control valve and a two-way valve of the related art, in which a solid arrow indicates a refrigerant flow during a heating operation, and a dashed arrow indicates a refrigerant flow during a defrosting operation in the bypass circuit H. Indicates.

FIG. 10 is a longitudinal sectional view of a conventional two-way valve in a closed state.

FIG. 11 is a longitudinal sectional view of a conventional control valve in a heating state.

FIG. 12 is an exploded perspective view of a valve seat and a valve body of a conventional control valve, (A) is a perspective view of the valve seat, and (B) is a perspective view of the valve body.

13 is a cross-sectional view showing a state in which a valve seat and a valve body of a conventional control valve are combined, and FIG.
Sectional drawing, (B) is BB sectional drawing of FIG.

FIG. 14 is a plan view showing a positional relationship between a valve seat and a valve element during heating of a control valve according to a conventional technique.

FIG. 15 is a plan view showing the positional relationship between the valve seat and the valve element during cooling of the control valve of the conventional technique.

FIG. 16 is a partially cutaway perspective view of a prior art control valve delay coupling means.

FIG. 17 is a plan view for explaining an operating state of the delay coupling means of the conventional control valve at the time of switching between cold and warm, in which (A) is for heating and (B) to (C) are for the valve opening. When squeezing
(D) is a plan view showing a state during cooling .

[Explanation of Codes] A Motorized valve B Four-way valve C Transmission device D Outdoor heat exchanger E Indoor heat exchanger F Compressor G Two-way valve H Bypass circuit Z Control valve 1 Case 2 Stator coil 3 Needle valve 4 Screw shaft 5 Rotor 6 Valve body 7 Propulsion bearing 8 Valve mouth 9 Convex portion 10 Lid 11 Flange portion 13a Stopper piece 13 Stopper 14
Upper protruding piece 15 Lower protruding piece 16 Delay transmission means 17
Chamber 18 Opening 19 Pipe 20
Opening 21 Pipe 22 Hole 23
Compression coil spring 24 Boss 24a Opening 25
Inner teeth 26 Guide bush 27 Collar 28
Connecting rod 29 External tooth 30 Engaging means 31
Valve body 32 Cylindrical case 33 Opening (inlet) 34
Opening (outlet) 35 Opening (through hole) 36 Opening (through hole) 37
Valve seat 38 Compression coil spring 39 Valve body 40
Introducing pipe 41 Outlet pipe 42 Through-hole pipe 43
Through-hole pipe 44 Valve body stopper 45 Through-hole 46
Through hole 47 Communication hole 48 Communication hole 51
2nd valve body 52 Internal tooth 53 Delay connection part 54
Valve seal 55 Delay connection 56 Locking piece 57
Second valve seat 58 Through hole 59 Bypass pipe 60
Engaging means 101 Valve body 102 Set screw 103
Valve seat 104 Inflow / outflow pipe 105 Inflow / outflow pipe 106
Valve body 107 Plunger 108 Spring 109
Suction element 110 Plunger tube 111
Electromagnet 112 Coil 113 Yoke

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁶ Identification number Agency reference number FI Technical display F25B 41/06 F25B 41/06 T

Claims (1)

[Claims] 1. A screw shaft integrally provided below the center of the rotor 5 by rotation of the rotor 5 in the case 1 by energizing the stator coil 2 on the outer peripheral portion of the case 1 made of a non-magnetic material. A needle valve 3 at the tip of a screw shaft is moved up and down via a valve 4 to control an opening degree of a valve port 8 at a lower portion of a valve body 6 provided at a lower end of the case 1, and at least three openings are concentric. A metal disk-shaped valve seat 37 provided above is provided at the upper end of the case 1, and the lower surface of the valve seat 37 is slid and rotated so that at least two of the three openings are air-tightly connected. One opening is a four-way valve B portion including a valve body 39 that is opened, and a motor-operated valve A portion provided between the rotor 5 of the motor-operated valve A portion and the valve body 39 of the four-way valve B portion. The valve port 8 is constituted by a transmission device C for transmitting rotation at a position immediately before full opening and a position immediately before full closing, Control in which the rotational force of the rotor 5 of the motor-operated valve A is used to interlock with opening / closing of the valve opening 8 of the motor-operated valve A and switching of the flow path by rotation of the valve body 39 of the four-way valve B. In the valve, the valve seat 37 of the four-way valve B part is provided with at least three openings concentrically and a through hole 58 is provided in the center part, and a bypass pipe 59 is provided in the through hole 58, and the valve element 39 is provided. A plate-like locking piece 56 is provided to face the wall surface of the opening 24a on the inner surface of the lower boss 24, and
a through hole 60 that connects the hole a in the upper portion of the valve body 39 to each other is provided, and the upper half portion of the second valve body 51 inserted into the opening 24a is notched in a fan shape to provide the delay connecting portion 53. Inner teeth 52 are provided in the center of the lower half, and the second valve body 51 is transferred to the transmission device C section by the delay connecting portion 53 of the second valve body 52 and the locking piece 56 provided on the wall surface of the opening 24a. And the valve element 39 with the respective predetermined rotation angles for the delay interlocking, the second valve seat 57 provided on the valve seat 37 is delayed for opening and closing, and then the valve element 39 of the four-way valve B portion is rotated. A control valve characterized in that