JP2001153494A - Motor operated selector valve and refrigerating cycle equipment for freezer-refrigerator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a motor operated selector valve used in refrigerating cycle equipment for a freezer-refrigerator, or the like, so as to attain both high performance and energy saving of the freezer-refrigerator in a higher degree. SOLUTION: A valve housing which has one inlet port communicating constantly with a valve chamber and a first outlet port B, a second outlet port C and a restricting groove 13 being opened in the base side of the valve chamber, a valve disk 17 which is so provided in the valve chamber as to be displaceable in rotation and has a partition wall part 20 dividing the end face being in contact with the base side of the valve chamber into a communication region 18 communicating with the valve chamber and a non-communication region 19 not communicating therewith and a motor operated actuator which drives the valve disk 17 to rotate in stages, are provided. The valve disk 17 is switched over to five positions of 1 to 5.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a motor-operated switching valve and a refrigeration cycle device for a refrigerator / refrigerator.

[0002]

2. Description of the Related Art In recent years, there has been an increasing demand for home refrigerators / refrigerators to be able to operate and control variously and precisely, and to achieve both high performance and energy saving of household refrigerators / refrigerators. .

[0003] As such a refrigerating cycle device for a refrigerator / refrigerator, Japanese Patent Laid-Open Publication No. H11-132577 discloses a refrigerating cycle device in which a condenser is connected to a discharge side of a compressor and an inlet port of a three-way valve is provided downstream of the condenser. Are connected to the freezer room capillary tube at one outlet port of the three-way valve, and the refrigerator room capillary tube is connected to the other outlet port, respectively, at the downstream side of the freezer room capillary tube and the refrigerator room capillary tube. 1 shows a refrigerating cycle apparatus to which a freezer evaporator, a refrigerator evaporator, and a suction side of a compressor are connected.

In the above-described refrigerating cycle apparatus, the switching operation of the three-way valve selectively connects the downstream side of the condenser to either the freezing room capillary tube or the refrigerating room capillary tube. And the operation mode in which the refrigerator compartment is prioritized can be selected and set, and the cycle efficiency can be increased.

[0005]

However, in the above-described refrigeration cycle apparatus, the three-way valve has a switching position in which the inlet port is connected to only one outlet port and a switching position in which the inlet port is connected only to the other outlet port. The two operation modes are, naturally, an operation mode in which the downstream side of the condenser is connected to the freezer capillary tube and a refrigerator mode in which the condenser is connected to the refrigerator tube tube of the condenser. It can only be set to the room-priority operation mode,
It is not enough to achieve both high performance and energy saving of refrigerators and refrigerators.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and has been made in order to achieve both high performance and energy saving of a refrigerator / refrigerator at a higher level. It is an object of the present invention to provide a refrigerating cycle device for a refrigerating / refrigerating machine, which can achieve both high performance and energy saving of a motor-operated switching valve and a refrigerating / refrigerating device.

[0007]

In order to achieve the above-mentioned object, a motor-operated switching valve according to the first aspect of the present invention comprises one inlet port constantly communicating with a valve chamber and a bottom surface of the valve chamber. A valve housing having a first outlet port, a second outlet port, and a throttle groove opened to the valve chamber, and an end face provided rotatably displaceable in the valve chamber and in contact with a bottom surface of the valve chamber, and communicating with the valve chamber. A valve body having a partition portion on the end surface for partitioning the communication region into a non-communication region and a non-communication region that does not communicate, and an electric actuator capable of driving the valve body to rotate in a stepwise manner. By stepwise rotation drive by the electric actuator, both the first outlet port and the second outlet port are in a first switching position corresponding to the communication area, and only the first outlet port is provided. Corresponds to the communication area A second switching position in which the second outlet port corresponds to the non-communication region, and a third switching position in which both the first exit port and the second exit port correspond to the non-communication region. A fourth switching position in which only the second outlet port corresponds to the communication area and the first outlet port corresponds to the non-communication area, and wherein the second outlet port corresponds to the communication area. A first outlet port corresponding to the non-communication area and a fifth switching position in which the first outlet port communicates with the communication area via the throttle groove by the partition wall straddling the throttle groove; The switching operation is performed during the operation.

According to another aspect of the present invention, there is provided a refrigeration cycle apparatus for a refrigerator / refrigerator according to the present invention, wherein a refrigerant from a discharge side of a compressor is passed through a condenser to a capillary tube for a freezing room. To the freezing room evaporator and the refrigerator room capillary tube or the refrigerator room evaporator, and the freezing room capillary tube or the freezing room evaporator and the refrigerator room capillary tube or the refrigerator room evaporator are supplied. 2. The refrigerating cycle device for a refrigerator / refrigerator that recirculates from the compressor to the suction side of the compressor, wherein the electric type according to claim 1, between the condenser, the freezer compartment capillary tube and the refrigerating compartment capillary tube. 3. A switching valve is interposed, the downstream side of the condenser is connected to the inlet port, and the first outlet port is located above the freezer chamber capillary tube. Side is connected upstream of the second refrigerator compartment capillary tube to the outlet port is being connected.

In the electric switching valve according to the first aspect of the present invention, the valve body is driven to rotate stepwise by the electric actuator to obtain five positions from the first switching position to the fifth switching position. Wherein in the first switching position, the inlet port is in communication with both the first outlet port and the second outlet port, and in the second switching position, the inlet port is in communication with only the first outlet port; In the third switching position, the inlet port is not connected to any of the first outlet port and the second outlet port, and in the fourth switching position, the inlet port is connected to only the second outlet port, and the fifth switching position is connected to the fifth outlet port. In the switching position, in addition to the state where the inlet port is connected to the second outlet port, the inlet port is connected to the first outlet port with a fixed throttle by a throttle groove.

In the refrigeration cycle apparatus for a refrigerator / refrigerator according to the second aspect of the present invention, the valve body of the electric switching valve is rotated stepwise by the electric actuator, so that the first switching position to the first switching position. Five operation modes are obtained by the five switching positions. In the first switching position, the first operation mode in which both the freezing room capillary tube and the refrigerating room capillary tube are connected downstream of the condenser is provided. ,
In the second switching position, a second operation mode in which only the freezer capillary tube is connected downstream of the condenser,
In the third switching position, the third operation mode in the fully closed state in which neither the freezing room capillary tube nor the refrigerating room capillary tube is connected downstream of the condenser is provided. In a fourth operation mode in which only the refrigerator-tube capillary tube is connected to the downstream side, the refrigerator-room capillary tube is connected to the downstream side of the condenser at the fifth switching position, and the freezing chamber is provided with a fixed throttle. A fifth operation mode in which the use capillary tube is connected in communication is obtained.

[0011]

Embodiments of the present invention will be described below in detail with reference to the accompanying drawings. FIG. 1 shows an embodiment of a refrigeration cycle apparatus for a refrigerator / refrigerator according to the present invention. A refrigeration cycle device for a refrigerator / refrigerator includes a compressor 1, a condenser (radiator) 2, a freezing room capillary tube (CTF) 3, and a refrigerator room capillary tube (CTR). ) 4, a freezer evaporator 5,
It has a refrigerator compartment evaporator 6 and an electric switching valve 7.

A condenser 2 is connected to a discharge side of the compressor 1, and an inlet port A of an electric switching valve 7 is provided downstream of the condenser 2.
Is connected to the first outlet port B of the electric switching valve 7, the capillary tube 3 for the freezer compartment is connected, the second outlet port C of the electric switching valve 7 is connected to the capillary tube 4 for the refrigerator compartment, The evaporator 6 for the refrigerating compartment, the evaporator 5 for the freezing compartment, and the suction side of the compressor 1 are sequentially connected to the downstream side of the capillary tube 4 for the refrigerating compartment. Further, the downstream side of the freezer room capillary tube 3 is the downstream side of the refrigerator room evaporator 6,
And it is connected to the upstream side of the freezer evaporator 5.

Next, the electric switching valve 7 according to the present invention will be described with reference to FIGS. Electric switching valve 7
Has a valve chamber 11 having a circular cross section in a valve housing 10. The valve housing 10 has one inlet port A which is opened on the side peripheral surface of the valve chamber 11 and is always in communication with the valve chamber 11;
A first outlet port B and a second outlet port C are formed on the bottom surface (valve seat surface) 12 of the valve chamber 11, and a throttle groove 13 is formed on the bottom surface 12 of the valve chamber 11.

The inlet port A is connected to the outlet side (downstream side) of the condenser 2 by an A-joint 14, the first outlet port B is connected to the inlet side of the freezer chamber capillary tube 3 by a B-joint 15, The inlet side of the refrigerating room capillary tube 4 is connected to the second outlet port C by a C joint 16.

A disk-shaped valve element 17 is provided in the valve chamber 11 so as to be rotationally displaceable. A substantially D-shaped partition wall portion that divides an end surface of a valve body 17 into contact with a bottom surface 12 of the valve chamber 11 into a communication area 18 communicating with the valve chamber 11 and a non-communication area 19 not communicating with the valve chamber 11. The valve body 17 is formed so as to protrude, and the valve body 17 is slidably in contact with the bottom surface 12 of the valve chamber 11 at the tip end surface of the partition wall portion 20.

A stepping motor 21 is mounted on the valve housing 10 as an electric actuator for driving the valve element 17 to rotate stepwise.

The stepping motor 21 includes a lower lid 22 air-tightly fixed to the valve housing 10 and a lower lid 22.
Cap-shaped rotor case 23 airtightly fixed on top
And a magnet 24 and a rotor 25 rotatably provided in the rotor case 23, and a cylindrical stator coil 26 fixed to the outside of the rotor case 23.

The valve element 17 is fixed to a valve element holder 27. The valve element holder 27 is connected to the rotor 25 so as to be fixed (non-movable) in the rotational direction and displaceable in the axial direction. To the valve 17. Further, between the rotor 25 and the valve element holder 27, a compression coil spring 28 for pressing the valve element 17 against the bottom surface 12 of the valve chamber 11 is provided.

The valve element 17 is driven by the stepping motor 21 in a stepwise manner to rotate the first outlet port B and the second outlet port B.
The first switching position (see FIG. 5A) in which both of the outlet ports C correspond to the communication area 18, and only the first outlet port B corresponds to the communication area 18, and the second outlet port C A second switching position corresponding to the non-communication area 19 (see FIG. 5B), and a third switching position in which both the first exit port B and the second exit port C correspond to the non-communication area 19 (FIG. 5
(C), and a fourth switching position (see FIG. 5 (d)) in which the second outlet port C corresponds to only the communication area 18 and the first outlet port B corresponds to the non-communication area 19. , The second outlet port C corresponds to the communication region 18, the first outlet port B corresponds to the non-communication region 19, and the partition wall portion 20 corresponds to the throttle groove 1.
3 and the first outlet port B is
The fifth switching position (FIG. 5) communicating with the communication area 18 through the
(See (e)) and the switching operation is performed to obtain five positions.

Next, the motor-operated switching valve 7 having the above-described structure is used.
The operation of the refrigeration cycle device for refrigeration / refrigerator including the above will be described. The valve element 17 of the electric switching valve 7 is rotated stepwise by a stepping motor 21 which is an electric actuator, so that the first switching position to the above-described first switching position.
Five positions of the fifth switching position are obtained. In the first switching position shown in FIG. 5A, the inlet port A communicates with both the first outlet port B and the second outlet port C. Connected
In the second switching position shown in FIG. 5 (b), the inlet port A is connected to only the first outlet port B, and FIG.
In the third switching position shown in (c), the inlet port A is not in communication with any of the first outlet port B and the second outlet port C, and is not shown in FIG. In the fourth switching position, the inlet port A is connected only to the second outlet port C, and in the fifth switching position shown in FIG. 5 (e), the inlet port A is connected to the second outlet port. In addition to the state of being connected to C, the inlet port A is connected to the first outlet port B with a fixed throttle by the throttle groove 13.

Therefore, in the first switching position, the first operation mode in which both the freezing-room capillary tube 3 and the refrigerating-room capillary tube 4 are connected downstream of the condenser 2 is changed to the second switching mode. In the second position, only the freezing room capillary tube 3 is connected to the downstream side of the condenser 2 at the position, and in the third switching position, the freezing room capillary tube 3 and the refrigerating room are located downstream of the condenser 2. The third state due to the fully closed state in which none of the capillary tubes 4
Is a fourth operation mode in which only the refrigerating room capillary tube 4 is connected downstream of the condenser 2 at the fourth switching position, and a downstream operation mode of the condenser 2 at the fifth switching position. A fifth operation mode is obtained in which the refrigerating room capillary tube 4 is connected and connected and the freezing room capillary tube 3 is connected and connected with a fixed throttle.

The first operation mode is a freezing room / refrigeration room full cooling operation, in which the evaporator 5 for the freezing room and the evaporator 6 for the refrigerating room are fully operated with respect to the evaporation load amount at the time of starting or the like. Ensure cooling effect. The second operation mode includes a freezer operation,
Perform the freezer compartment priority cooling operation with the refrigerator compartment stopped. The third operation mode prevents the high-temperature and high-pressure refrigerant from flowing into the freezer compartment evaporator 5 and the refrigerator compartment evaporator 6 when the operation is stopped in the fully closed state, and extends the operation stop time. In the fourth operation mode, the refrigerator compartment operation and the refrigerator compartment priority cooling operation in which the freezer compartment is stopped are performed. In the fifth operation mode, the refrigerator compartment near-priority cooling operation of the refrigerator compartment operation and the freezer compartment low-level cooling holding operation is performed.

By the various and precise operations and controls described above, the performance and energy saving of the refrigerator / refrigerator can be more highly compatible.

The configuration of the refrigerant circuit of the refrigeration cycle apparatus for a refrigerator / refrigerator according to the present invention is not limited to that shown in FIG. 1, but the capillary tube 3 for the freezer and the evaporator for the freezer. And a series circuit of the refrigerating room capillary tube 4 and the refrigerating room evaporator 6 may be provided in parallel with each other. The connection can be switched by the electric switching valve 7.

The outlet ports B, C of the electric switching valve 7
Can be reversed between the freezer compartment capillary tube 3 and the refrigerator compartment capillary tube 4. In this case, in the fifth switching position, the freezer compartment capillary tube 3 is located downstream of the condenser 2. And a fifth operation mode in which the refrigerator tube 4 with a fixed throttle is connected and connected is provided, and the freezer compartment priority operation and the refrigerator compartment low-level cooling holding operation (dehumidification operation) can be performed.

[0026]

As can be understood from the above description, according to the electrically operated switching valve according to the first aspect of the present invention, the valve body is rotationally driven stepwise by the electrically operated actuator, whereby Five positions from the switching position to the fifth switching position are obtained. In the first switching position, the inlet port is connected to both the first outlet port and the second outlet port, and in the second switching position, the inlet port is connected. Are communicatively connected only to the first outlet port, and in the third switching position, the inlet port is not communicatively connected to either the first outlet port or the second outlet port;
In the fourth switching position, the inlet port is connected only to the second outlet port, and in the fifth switching position, the inlet port is connected to the second outlet port.
In addition to the state in which it is connected to the outlet port, the inlet port is connected to the first outlet port with a fixed throttle by a throttle groove. Operation and control, and it is possible to achieve both higher performance and energy saving of the refrigerator / refrigerator at a higher level.

[0027] Further, the freezing and refrigerating method according to the second aspect of the present invention.
According to the refrigerating cycle device for a refrigerator, the valve body of the electric switching valve is rotationally driven stepwise by the electric actuator, so that five operation modes according to the first switching position to the fifth switching position are set. In the first switching position, the first operation mode in which both the freezing room capillary tube and the refrigerating room capillary tube are connected to the downstream side of the condenser in the first switching position, and the second switching position is located downstream of the condenser. In the second operation mode in which only the freezer capillary tube is connected and connected to the side, neither the freezer capillary tube nor the refrigerating room capillary tube is connected and connected downstream of the condenser at the third switching position. A third operation mode based on the fully closed state is a fourth operation mode in which only the refrigerating chamber capillary tube is connected downstream of the condenser at the fourth switching position. Fifth refrigerating compartment capillary tube on the downstream side of the condenser at the position freezer compartment capillary tube with a fixed throttle is connected communication are communicated with
Since the operation mode described above can be obtained, various and precise operations and controls are performed, and higher performance and energy saving of the refrigerator / refrigerator can be more highly compatible.

[Brief description of the drawings]

FIG. 1 is a configuration diagram showing one embodiment of a refrigeration cycle device for a refrigerator / refrigerator according to the present invention.

FIG. 2 is a cross-sectional view showing one embodiment of the electric switching valve according to the present invention.

FIG. 3 is a perspective view of a valve seat portion of the electric switching valve according to the present invention.

FIG. 4 is a perspective view of a valve body of the electric switching valve according to the present invention.

FIGS. 5 (a) to (e) are diagrams showing each switching position state of the electric switching valve according to the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Compressor 2 Condenser 3 Capillary tube for freezer compartment 4 Capillary tube for refrigerator compartment 5 Evaporator for freezer compartment 6 Evaporator for refrigerator compartment 7 Electric switching valve 10 Valve housing 11 Valve room 13 Restrictor groove 17 Valve body 18 Communication area 19 Non-communication area 20 Partition wall 21 Stepping motor 24 Magnet 25 Rotor 26 Stator coil 27 Valve holder A Inlet port B First outlet port C Second outlet port

Claims (2)

[Claims] A valve housing having one inlet port constantly communicating with a valve chamber, a first outlet port, a second outlet port, and a throttle groove opened at a bottom surface of the valve chamber; A valve body having a partition wall portion on the end surface, which is provided so as to be rotationally displaceable, and divides an end surface abutting on a bottom surface of the valve chamber into a communication region communicating with the valve chamber and a non-communication region not communicating with the valve chamber. An electric actuator capable of driving the valve body to rotate in a stepwise manner, wherein the valve body is driven by the electric actuator in a stepwise manner to rotate the first outlet port and the second outlet. A first switching position in which both of the ports correspond to the communication region, and a second switching position in which only the first outlet port corresponds to the communication region and the second outlet port corresponds to the non-communication region And the first outlet A third switching position in which both the port and the second outlet port correspond to the non-communication region, and only the second outlet port corresponds to the communication region, and the first outlet port is in the non-communication region. A fourth switching position corresponding to an area, the second outlet port corresponding to the communication area, the first outlet port corresponding to the non-communication area, and the partition wall straddling the throttle groove. An electric switching valve, wherein the first outlet port switches between a fifth switching position and the fifth switching position which communicates with the communication region via the throttle groove. 2. A refrigerant from a discharge side of the compressor is selectively supplied to a freezing room capillary tube or a freezing room evaporator and a freezing room capillary tube or a refrigerating room evaporator via a condenser. Refrigeration / refrigeration that is recirculated from the freezing room capillary tube or freezing room evaporator and the freezing room capillary tube or cold room evaporator to the suction side of the compressor.
In the refrigerating cycle device for a refrigerator, the electric switching valve according to claim 1 is interposed between the condenser and the capillary tube for the freezer compartment and the capillary tube for the refrigerator compartment, and the inlet port is provided. The downstream side of the condenser is connected to the first outlet port, the upstream side of the freezing room capillary tube is connected to the first outlet port, and the upstream side of the refrigerator room capillary tube is connected to the second outlet port. A refrigeration cycle device for a refrigerator / refrigerator.