JP4786822B2 - Electric four-way switching valve and refrigeration cycle apparatus - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an electric four-way switching valve and a refrigeration cycle apparatus.
[0002]
[Prior art]
Refrigeration / refrigerator used throughout the year, especially home refrigeration / refrigerator operation and control more diverse and denser than ever to achieve both high performance and energy saving The demand to do has increased in recent years.
[0003]
As a refrigeration cycle apparatus for a refrigeration / refrigerator that meets such requirements, Japanese Patent Application Laid-Open No. 11-132777 discloses a condenser connected to the discharge side of a compressor and an inlet port of a three-way valve downstream of the condenser. Are connected to one outlet port of the three-way valve, and a capillary tube for the refrigeration chamber is connected to the other outlet port, respectively, on the downstream side of the capillary tube for the freezing chamber and the capillary tube for the refrigeration chamber A refrigeration cycle apparatus to which an evaporator for a freezer compartment, an evaporator for a refrigerator compartment, and a suction side of a compressor are connected is shown.
[0004]
In the above-described refrigeration cycle apparatus, the downstream side of the condenser is selectively connected to one of the capillary tube for the freezer compartment and the capillary tube for the refrigerator compartment by the switching operation of the three-way valve. The priority operation mode can be selected and set, and the cycle efficiency can be improved.
[0005]
[Problems to be solved by the invention]
However, in the above-described refrigeration cycle apparatus, the three-way valve has only two positions: a switching position for connecting the inlet port only to one outlet port and a switching position for connecting the inlet port only to the other outlet port. The operation mode is naturally the operation mode with priority to the freezer compartment in which the downstream side of the condenser is connected to the capillary tube for freezer, and the operation mode with priority to the refrigerator compartment in which the downstream side of the condenser is connected to the capillary tube for refrigerator compartment. However, it has not been possible to achieve both high-performance and energy-saving of refrigeration / refrigerator at a high level. There is room.
[0006]
The present invention has been made to solve the above-described problems, and in order to achieve both high performance and energy saving of the product at a high level, various switching states have been established. Electric four-way switching valve used in refrigeration cycle equipment for refrigeration and refrigerators that can diversify operation modes, and refrigeration that achieves both high-performance and energy-saving products more fully by diversifying operation modes The object is to provide a cycle device.
[0007]
[Means for Solving the Problems]
  In order to achieve the above-mentioned object, an electric four-way switching valve according to the present invention has a valve chamber and one inlet port which is always in communication with the valve chamber and an opening at a position apart from each other on a flat bottom surface of the valve chamber. A valve housing having a first outlet port, a second outlet port, and a third outlet port, and a valve housing that is rotatably displaceable in the valve chamber, and is disposed on an end surface of the valve chamber facing the bottom surface. A port opening / closing shape portion for blocking communication between the chamber and the first to third outlet ports, and the port opening / closing shape portion is displaced relative to the first to third outlet ports by rotational displacement. A valve body that switches communication between the valve chamber and the first to third outlet ports, and an electric actuator that rotationally drives the valve body in a stepwise manner. Staged by actuator A first switching position in which communication between the second outlet port and the third outlet port and the valve chamber is cut off and only the first outlet port is communicated with the valve chamber by driving; A second switching position in which communication between the first outlet port and the third outlet port and the valve chamber is interrupted and only the second outlet port is communicated with the valve chamber; and the first outlet port; A third switching position that blocks all communication between the second outlet port and the third outlet port and the valve chamber; and communication between the first outlet port, the second outlet port and the valve chamber. And a fourth switching position in which only the third outlet port communicates with the valve chamber.A fifth switching position that blocks communication between the third outlet port and the valve chamber and connects both the first outlet port and the second outlet port to the valve chamber;During this period, the switching operation is performed.
[0008]
According to the electric four-way switching valve of the present invention, the valve element is rotationally driven stepwise by the electric actuator, so that the port opening / closing shape part at the bottom of the valve element is changed from the first outlet port to the third outlet port. On the other hand, four positions of the first switching position to the fourth switching position are obtained, and the communication between the second outlet port and the third outlet port and the valve chamber is cut off at the first switching position. Thus, a state in which only the first outlet port is communicated with the valve chamber is obtained, and in the second switching position, the communication between the first outlet port and the third outlet port and the valve chamber is cut off to thereby provide the second outlet port. Only in the valve chamber, and in the third switching position, the first outlet port, the second outlet port, and the third outlet port are all disconnected from the valve chamber. In the fourth switching position, the first outlet port and the second outlet State for communicating only a third outlet port to the valve chamber to interrupt the communication between the over bets and the valve chamber is obtained.
[0009]
  further,The communication between the third outlet port and the valve chamber can be cut off to obtain a fifth switching position where both the first outlet port and the second outlet port communicate with the valve chamber, Five positions from the first switching position to the fifth switching position can be obtained.
[0010]
The electric four-way switching valve according to the present invention has, as a detailed configuration, a port-shaped opening / closing shape portion of the valve body having a rib shape that is divided into an open region that is open to the valve chamber and a non-open region that is not open. It has a partition wall, and the non-open area has a pocket shape surrounded by the rib-shaped partition wall.
[0011]
According to the electric four-way switching valve of the present invention, the port opening / closing shape portion of the valve body has a rib-shaped partition wall portion that is divided into an open region that is open to the valve chamber and a non-open region that is not open. Since the non-open area has a pocket shape surrounded by a rib-shaped partition wall, the pocket-shaped part acts as a pressure-receiving surface for the differential pressure, and the valve body is the bottom surface of the valve chamber (seat surface) The rib-shaped partition wall is pressed against the bottom surface (seat surface) of the valve chamber with an appropriate surface pressure, and an appropriate valve shut-off property is obtained.
[0012]
  In order to achieve the above-mentioned object, a refrigeration cycle apparatus according to the present invention includes a refrigerant passage for supplying refrigerant from a discharge side of a compressor to a refrigerator for a refrigerator compartment from a capillary tube for the refrigerator compartment through a condenser. And a refrigerant passage that supplies the freezer compartment evaporator through the condenser to the freezer compartment evaporator, and sucks refrigerant from the freezer compartment evaporator and / or the refrigerator compartment evaporator into the compressor. In the refrigeration cycle apparatus to be recirculated to the side, an electric four-way switching valve according to the above-described invention is interposed between the condenser, the capillary tube for the refrigeration chamber, and the capillary tube for the freezing chamber, and the inlet port A downstream side of the condenser is connected to the first outlet port, and an upstream side of the capillary tube for the refrigerator compartment is connected to the first outlet port, and the freezer compartment is connected to the second outlet port. Upstream of the capillary tube is connected, the suction side of the compressor are connected by a bypass passage to said third outlet portThe order of the operation mode obtained by switching the electric four-way switching valve is a refrigeration chamber priority cooling mode in which only the refrigeration chamber capillary tube is connected to the downstream side of the condenser, and the refrigeration chamber capillary on the downstream side of the condenser. Freezing chamber priority cooling mode in which only the freezer compartment capillary tube is connected to the downstream side of the condenser, and the freezer compartment preferential cooling mode in which the tube and the freezer compartment capillary tube are connected to each other, on the downstream side of the condenser Compressor stop mode in the fully closed state where none of the freezer compartment capillary tube, the refrigerator compartment capillary tube, or the bypass passage is connected, and the bypass mode where only the bypass passage is connected downstream of the condenser. Characterize.
[0013]
  According to the refrigeration cycle apparatus according to the present invention, the valve body of the electric four-way switching valve is rotationally driven stepwise by the electric actuator, for example, from the first switching position to the first switching position.5Depending on the switching position5First operation mode in which only the capillary tube for the refrigerator compartment is connected to the downstream side of the condenser at the first switching position.(Refrigerator priority cooling mode)However, in the second switching position, only the freezer compartment capillary tube is connected to the downstream side of the condenser in the second operation mode.(Freezer priority cooling mode)However, in the third switching position, the third operation mode in the fully closed state in which none of the capillary tube for the freezer compartment, the capillary tube for the refrigerator compartment, and the bypass passage is connected to the downstream side of the condenser.(Compressor stop mode)  However, in the fourth switching position, only the bypass passage is connected to the downstream side of the condenser in the fourth operation mode.(Bypass mode)ButIn the fifth switching position, the refrigeration room capillary tube and the freezing room capillary tube are both connected to the downstream side of the condenser in a fifth operation mode (refrigeration room / freezing room full cooling mode).Is obtained.
[0019]
  In order to achieve the above object, a refrigeration cycle apparatus according to the present invention includes a refrigerant passage for supplying refrigerant from a discharge side of a compressor to an evaporator from a first capillary tube via a condenser, and the condensation A refrigeration unit that has a refrigerant passage that is supplied to the evaporator from a second capillary tube that has a pressure reduction capability different from that of the first capillary tube, and circulates the refrigerant from the evaporator to the suction side of the compressor. In the cycle device, the condenser is provided between the first capillary tube and the second capillary tube.1An electric four-way switching valve is provided, the downstream side of the condenser is connected to the inlet port, the upstream side of the first capillary tube is connected to the first outlet port, and the second The upstream side of the second capillary tube is connected to the outlet port, the suction side of the compressor is connected to the third outlet port by a bypass passage, and the operation mode obtained by switching the electric four-way switching valve is The order is a first cooling mode in which only the first capillary tube is connected in communication with the downstream side of the condenser, and a third mode in which the first capillary tube and the second capillary tube are connected in communication with the downstream side of the condenser. Cooling mode, the second cooling mode in which only the second capillary tube is connected to the downstream side of the condenser, the first capillary tube downstream of the condenser Second capillary tube, and characterized by a both compressor stop mode by fully closed state that is not communicatively connected, the order of the bypass mode to be connected only communicating the bypass passage on the downstream side of the condenser of the bypass passage.
[0020]
Also in the refrigeration cycle apparatus according to the present invention, the valve body of the electric four-way switching valve is rotationally driven stepwise by the electric actuator, so that, for example, five operation modes by the first switching position to the fifth switching position are performed. The first operation mode (first cooling mode) in which only the first capillary tube is connected to the downstream side of the condenser at the first switching position is the downstream of the condenser at the second switching position. A second operation mode (second cooling mode) in which only the second capillary tube is connected to the side, and at the third switching position, the first capillary tube, the second capillary tube, In the third operation mode (compressor stop mode) in the fully closed state in which none of the bypass passages are connected to each other, only the bypass passage is connected to the downstream side of the condenser at the fourth switching position. Is the fifth operation mode (third cooling mode) in which the first capillary tube and the second capillary tube are both connected to the downstream side of the condenser at the fifth switching position. Is obtained.
[0021]
DETAILED DESCRIPTION OF THE INVENTION
  Embodiments of the present invention will be described below in detail with reference to the accompanying drawings.
  An embodiment of an electric four-way switching valve according to the present invention with reference to FIGS.And reference examplesWill be described. The electric four-way switching valve 100 has a valve chamber 11 in a valve housing 10 having a circular cross section. The valve housing 10 has one inlet port A that opens to the side circumferential surface of the valve chamber 11 and is always in communication with the valve chamber 11, and a first outlet port B that opens to the bottom surface (seat surface) 12 of the valve chamber 11. A second outlet port C and a third outlet port D are formed. The first outlet port B, the second outlet port C, and the third outlet port D are spaced apart from each other in the circumferential direction (valve rotation direction) at the same radial position with respect to the center of the valve chamber bottom surface 12. Is provided.
[0022]
An A joint 13, a B joint 14, a C joint 15, and a D joint 16 are connected to the inlet port A, the first outlet port B, the second outlet port C, and the third outlet port D, respectively.
[0023]
In the valve chamber 11, a disc-shaped valve body 17 is provided so as to be capable of rotational displacement around its own central axis. On the end surface (valve body bottom surface) where the valve body 17 faces the bottom surface 12 of the valve chamber 11, as a port opening / closing shape portion, an open region 18 opened to the valve chamber 11 and a non-opened state to the valve chamber 11. A rib-shaped (protruding rib) partition wall 20 that is divided into an open region 19 is formed to protrude. The partition wall 20 is formed in a crescent-shaped closed loop, and the non-open region 19 is surrounded by the partition wall 20 in a pocket shape (concave).
[0024]
The valve body 17 is in contact with the bottom surface 12 of the valve chamber 11 at the front end surface of the partition wall portion 20 so as to be slidable.
[0025]
A stepping motor 21 is attached to the valve housing 10 as an electric actuator that rotationally drives the valve body 17 stepwise.
[0026]
The stepping motor 21 is provided with a lower lid 22 that is airtightly fixed to the valve housing 10, a cap-like rotor case 23 that is airtightly fixed on the lower lid 22, and a rotor case 23 that is rotatable. A magnet 24 and a rotor 25, and a cylindrical stator coil assembly 27 fixed to the outside of the rotor case 23 by a locking pin 26 are fixed.
[0027]
The valve body 17 is positioned and connected to the valve holder member 28 with respect to the rotational direction. The valve holder member 28 is positioned and connected to the rotor 25 with respect to the rotational direction, and transmits the rotation of the rotor 25 to the valve body 17.
[0028]
A compression coil spring 29 is provided between the step portions of the rotor 25 and the valve holder member 28. The compression coil spring 29 is preloaded and urges the valve body 17 together with the valve holder member 28 toward the valve chamber bottom surface 12.
[0029]
A stopper piece 30 is formed upright on the upper surface of the lower lid 22, and the stopper piece 30 is covered with a buffer rubber (not shown). A stopper protrusion 31 is formed at the lower edge of the magnet 24. The stopper protrusion 31 abuts against the buffer rubber, thereby restricting the rotational movement of the coupling body of the rotor 25 and the magnet 24. In order to determine the base point of the stepping motor 21 (zero point setting), the initial position in the rotational direction of the connecting body of the rotor 25 and the magnet 24 is set. This initial position is a first switching position, which will be described later, obtained with 0 pulses.
[0030]
  The valve body 17 is rotationally driven stepwise by the stepping motor 21, so that the port opening / closing portion at the bottom of the valve body is in relation to the first outlet port A, the second outlet port B, and the third outlet port C. The valve body 17 establishes the following four positions (first switching position to fourth switching position) by the relative displacement.In the embodiment described later, a fifth switching position is established in addition to the fourth switching position.
(1) When the stepping motor 21 is in the 0 pulse state, both the second outlet port C and the third outlet port D correspond to the non-open region 19 as shown in FIG. A first switching position in which only the first outlet port B corresponds to the open area 18.
(2) When the stepping motor 21 is in the 18-pulse state, both the first outlet port B and the third outlet port D correspond to the non-open area 19 as shown in FIG. A second switching position in which only the second outlet port C corresponds to the open area 18.
[0031]
(3) When the stepping motor 21 is in the 36 pulse state, as shown in FIG. 3C, all of the first outlet port B, the second outlet port C, and the third outlet port D are A third switching position corresponding to the non-open area 19.
(4) When the stepping motor 21 is in the 54-pulse state, both the first outlet port B and the second outlet port C correspond to the non-open area 19 as shown in FIG. A fourth switching position in which only the third outlet port D corresponds to the open area 18.
[0032]
By the stepwise rotation drive of the valve body 17 by the stepping motor 21 described above, the communication between the first outlet port B and the inlet port A is shown in FIG. The communication is shown in FIG. 4B, and the communication between the third outlet port D and the inlet port A is shown in FIG. 4C.
[0033]
As a result, in the first switching position, the communication between the second outlet port C and the third outlet port D and the valve chamber 11, and the communication with the inlet port A is cut off, and only the first outlet port B is blocked. A state of communicating with the valve chamber 11 to the inlet port A is obtained, and in the second switching position, communication between the first outlet port B and the third outlet port D and the valve chamber 11 to the inlet port A is interrupted. A state is obtained in which only the second outlet port C communicates with the valve chamber 11 to the inlet port A. In the third switching position, the first outlet port B, the second outlet port C, and the third outlet port D are obtained. And the communication between the valve chamber 11 and the inlet port A is obtained. In the fourth switching position, the first outlet port B and the second outlet port C and the valve chamber 11 to the inlet port A are connected. Block communication and connect only the third outlet port D to the valve chamber to the inlet port A State communicating is obtained.
[0034]
In the switching operation described above, the non-opening region 19 has a pocket shape surrounded by a rib-shaped partition wall 20 on the entire periphery, so that the pocket-shaped portion acts as a pressure receiving surface for the differential pressure. A load is applied to the body 17 against the bottom surface 12 of the valve chamber, and the rib-shaped partition wall portion 20 is pressed against the bottom surface 12 of the valve chamber with an appropriate surface pressure, so that an appropriate valve cutoff is obtained.
[0035]
FIG. 5 shows an embodiment of a refrigeration cycle apparatus for a refrigeration / refrigerator according to the present invention. A refrigeration cycle apparatus for a refrigeration / refrigerator includes a compressor 1, a condenser (radiator) 2, a capillary tube for cold room (CTR) 3, and a capillary tube for freezer room (CTF). ) 4, a refrigerator compartment evaporator 5, a freezer compartment evaporator 6, and an electric four-way switching valve 100.
[0036]
A condenser 2 is connected to the discharge side of the compressor 1, an inlet port A of the electric four-way switching valve 100 is connected to the downstream side of the condenser 2, and a first outlet port B of the electric four-way switching valve 100 is connected. The refrigerator compartment capillary tube 3 is connected, the freezer capillary tube 4 is connected to the second outlet port C of the electric four-way switching valve 100, and the refrigerator compartment evaporator is located downstream of the refrigerator compartment capillary tube 3. 5, the freezer compartment evaporator 6, the check valve 7, and the suction side of the compressor 1 are connected in this order. The downstream side of the freezer compartment capillary tube 4 is connected to the downstream side of the refrigerator compartment evaporator 5 and to the upstream side of the freezer compartment evaporator 6.
[0037]
The third outlet port D of the electric four-way switching valve 100 bypasses and condenses all of the capillary tube 3 for the refrigeration chamber, the capillary tube 4 for the freezer compartment, the evaporator 5 for the refrigerator compartment, and the evaporator 6 for the freezer compartment. A bypass passage 8 connecting the compressor 2 to the suction side of the compressor 1 is connected.
[0038]
Next, the operation of the refrigeration cycle apparatus for refrigeration / refrigerator configured as described above will be described.
[0039]
The valve body 17 of the electric four-way switching valve 100 is rotationally driven stepwise by a stepping motor 21 that is an electric actuator, thereby obtaining the four positions from the first switching position to the fourth switching position described above. In the first switching position, the first operation mode (refrigeration room priority cooling mode) in which the refrigerator tube 3 is connected in communication with the downstream side of the condenser 2 is in the second switching position. The second operation mode (freezer compartment priority cooling mode) in which the freezer compartment capillary tube 4 is connected to the downstream side is connected to the downstream side of the condenser 2 at the third switching position, and the freezer compartment capillary tube 3 and the refrigerator compartment are provided downstream. In the third operation mode (compressor stop mode) in the fully closed state in which neither the capillary tube 4 nor the bypass passage 8 is in communication, the downstream side of the condenser 2 is bypassed at the fourth switching position. 8 fourth operating mode (bypass mode) is obtained in the order in which they are bypassed connected to the suction side of the compressor 1 by.
[0040]
With the above-mentioned diverse and precise operation and control, higher performance and energy saving of the refrigeration / refrigerator are more highly compatible.
[0041]
The operation stop determination of the compressor 1 of the freezer / refrigerator is performed by detecting a difference between the temperature (actual temperature) of the refrigerator compartment or the freezer compartment and the set temperature in the first operation mode or the second operation mode. In the case where it is not necessary to perform cooling, the electric four-way switching valve 100 is fully closed (third switching position) to enter the third operation mode (compressor stop mode). The operation of the compressor 1 is stopped. Since the compressor is fully closed when the compressor is stopped, wasteful heat transfer of the refrigerant can be prevented and heat loss can be reduced.
[0042]
When cooling needs to be performed due to the rise in the internal temperature, the operation of the compressor 1 is resumed. When the operation is resumed, the electric four-way switching valve 100 is switched from the third switching position to the fourth switching position to enter the bypass mode that is the fourth operation mode. As a result, the high and low pressures in the refrigerant circuit are balanced, and the pressure difference before and after the compressor is reduced, and the compressor 1 is restarted in this state.
[0043]
Since the pressure difference before and after the compressor at the time of restart is small, the starting load of the compressor 1 is reduced, and the starting power of the compressor 1 is reduced. Since the power of the compressor 1 is larger at the time of start-up than during operation, and the capacity selection of the compressor 1 is determined by the start-up power, the capacity of the compressor 1 can be reduced by reducing the start-up power.
[0044]
Further, the above-described bypass mode can be obtained by providing a switching operation of the electric four-way switching valve 100 without separately providing an opening / closing valve for the bypass passage 8.
[0045]
The cooling operation after the restart of the compressor 1 switches the electric four-way switching valve 100 from the fourth switching position to the third switching position, switches from the bypass mode to the compressor stop mode (fully closed mode), and thereafter The electric four-way switching valve 100 is switched to the second switching position or the first switching position to set the freezer compartment preferential cooling mode or the refrigerator compartment preferential cooling mode to cool the interior.
[0046]
When the compressor 1 is restarted, a part of the liquid refrigerant flows to the low-pressure side due to temporarily entering the bypass mode. However, the freezer compartment priority cooling mode or the refrigerator compartment priority cooling is performed through the fully closed mode from the bypass mode. By entering the mode, the liquid refrigerant that has flowed to the low-pressure side is quickly collected in a short time.
[0047]
In performing the above-described operation, it is necessary to set the order of operation modes obtained by switching the electric four-way switching valve 100 to refrigerator compartment priority cooling ← → freezer compartment priority cooling ← → compressor stop ← → bypass, By setting the switching order, the energy saving performance is further improved.
[0048]
The refrigerant circuit configuration of the refrigeration cycle apparatus for refrigeration / refrigerator according to the present invention is not limited to that shown in FIG. 5, and the capillary tube 3 for the refrigerator compartment and the evaporator 5 for the refrigerator compartment. And the series circuit of the freezer capillary tube 4 and the freezer evaporator 6 may be provided in parallel with each other, and the series circuit and the condenser 2 may be connected to each other. It can also be switched by the electric four-way switching valve 100.
[0049]
FIG. 6 shows another embodiment of the refrigeration cycle apparatus according to the present invention. The refrigeration cycle apparatus of this embodiment includes a compressor 51, a condenser (heat radiator) 52, a first capillary tube (C.T.B) 53, and a second capillary tube (C.T.C). 54, an evaporator 55, and an electric four-way switching valve 100.
[0050]
A condenser 52 is connected to the discharge side of the compressor 51, an inlet port A of the electric four-way switching valve 100 is connected to the downstream side of the condenser 52, and a first outlet port B of the electric four-way switching valve 100 is connected. The first capillary tube 53 is connected, the second capillary tube 54 is connected to the second outlet port C of the electric four-way switching valve 100, and the downstream side of the first capillary tube 53 and the second capillary tube 54. Further, the evaporator 55, the check valve 57, and the suction side of the compressor 51 are connected in order.
[0051]
The third outlet port D of the electric four-way selector valve 100 bypasses all of the first capillary tube 53, the second capillary tube 54, and the evaporator 55, and connects the condenser 52 to the suction side of the compressor 51. A bypass passage 58 is connected.
[0052]
Also in this embodiment, the valve element 17 of the electric four-way switching valve 100 is rotationally driven stepwise by the stepping motor 21 that is an electric actuator, so that the first to fourth switching positions are changed. 4 positions are obtained. At the first switching position, the first operation mode (for example, the rapid cooling mode) in which the first capillary tube 53 is connected to the downstream side of the condenser 52 is connected, and at the second switching position, The second operation mode (for example, the energy saving mode) in which the second capillary tube 54 is connected to the downstream side of the condenser 52 is connected to the first capillary tube 53 on the downstream side of the condenser 52 at the third switching position. The third operation mode (compressor stop mode) in the fully closed state in which neither the second capillary tube 54 nor the bypass passage 58 is connected in communication is the condenser in the fourth switching position. The fourth mode of operation of the downstream side of the secondary is bypassed connected to the suction side of the compressor 1 by a bypass passage 58 (bypass mode) is obtained in sequence.
[0053]
Therefore, also in this embodiment, the high performance and energy saving of the apparatus can be achieved at a higher level by the various and precise operations and controls as described above.
[0054]
  FIG. 7 shows an electric four-way switching valve according to the present invention.The fruitThe embodiment is shown. In FIG.Explained as a reference exampleParts corresponding to those in FIG. 3 are denoted by the same reference numerals as those in FIG.
[0055]
  In this embodiment, the valve body 17 is rotationally driven stepwise by the stepping motor 21 so that the port opening / closing shape portion at the bottom of the valve body has the first outlet port A, the second outlet port B, the third Relative to the outlet port C,Explained as a reference exampleIn addition to the first to fourth switching positions, when the stepping motor 21 is in the 9-pulse state, as shown in FIG. 7E, the first stepping motor 21 is in the 9-pulse state. A fifth switching position is obtained in which both the outlet port B and the second outlet port C correspond to the open region 18 and only the third outlet port D corresponds to the non-open region 19.
[0056]
Thus, in the fifth switching position, the first outlet port B and the second outlet port C communicate with the valve chamber 11 to the inlet port A, and only the third outlet port D is connected to the valve chamber 11 to the inlet port. A state of being cut off from communication with A is obtained.
[0057]
Application of the electric four-way switching valve 100 according to this embodiment to the refrigeration cycle apparatus is similar to the refrigeration cycle apparatus for the refrigeration / refrigerator shown in FIG. 5 and the refrigeration cycle apparatus shown in FIG. In the state in which the electric four-way switching valve 100 is switched to the fifth switching position, the refrigerator-use capillary tube 3 (first capillary tube 53) and the freezer compartment are provided downstream of the condenser 2. A fifth operation mode in which both the capillary tubes 4 (second capillary tubes 54) are connected in communication can also be obtained.
[0058]
In this fifth operation mode, the refrigeration cycle apparatus for the refrigeration / refrigerator shown in FIG. 5 is the refrigeration room / freezing room full cooling operation. The cooling effect in the full operation is ensured with respect to the evaporation load amount of the room evaporator 6, and in the refrigeration cycle apparatus shown in FIG. This is a fifth operation mode having a higher cooling efficiency than that of the rapid cooling mode. In addition, the cooling effect in the full operation is ensured with respect to the evaporation load amount of the evaporator 55 immediately after the start-up.
[0059]
【The invention's effect】
As can be understood from the above description, according to the electric four-way switching valve according to the present invention, the valve opening / closing shape formed on the end face of the valve body is driven stepwise by the electric actuator. Since the part is relatively displaced with respect to the three output ports that are open on the flat bottom surface of the valve chamber, the communication block between the inlet port and the three outlet ports that are always in communication with the valve chamber is switched. Many switching positions can be obtained with a simple structure.
[0060]
According to the refrigeration cycle apparatus according to the present invention, the operation mode can be diversified to achieve both higher performance and energy saving of the product at a higher level.
[Brief description of the drawings]
FIG. 1 is a sectional view showing an embodiment of an electric four-way switching valve according to the present invention.
FIG. 2 is a bottom view of the main body portion excluding the stator coil assembly of the electric four-way switching valve of FIG. 1;
FIG. 3 (a) to (d) areReference exampleIt is a figure which shows each switching position state of the electrically driven four-way switching valve by.
FIG. 4 (a) to (c)Reference exampleIt is a figure which shows the valve opening / closing characteristic of the electrically driven four-way switching valve by.
FIG. 5 is a configuration diagram showing one embodiment of a refrigeration cycle apparatus according to the present invention.
FIG. 6 is a block diagram showing another embodiment of the refrigeration cycle apparatus according to the present invention.
FIGS. 7A to 7E are views showing respective switching position states of the electric four-way switching valve according to the present invention.
[Explanation of symbols]
  1,51 Compressor
  2,52 Condenser
  3 Capillary tube for refrigerator compartment
  4 Capillary tube for freezer
  5 Freezer compartment evaporator
  6 Refrigerating room evaporator
  8, 58 Bypass passage
  15 Evaporator
  100 Electric four-way switching valve
  10 Valve housing
  11 Valve chamber
  17 Disc
  18 Open area
  19 Non-open area
  20 Bulkhead
  21 Stepping motor
  31 cushion rubber
  53 First capillary tube
  54 Second capillary tube
  100 Electric four-way switching valve
  A Inlet port
  B First outlet port
  C Second outlet port
  D Third exit port

Claims (4)

One inlet port always communicating with the valve chamber and the valve chamber, and a first outlet port, a second outlet port, and a third outlet port that are opened at positions apart from each other on a flat bottom surface of the valve chamber; A valve housing having
The valve chamber is provided so as to be capable of rotational displacement, and has an opening / closing shape portion for blocking communication between the valve chamber and the first to third outlet ports on an end surface facing the bottom surface of the valve chamber, A valve body that switches communication between the valve chamber and the first to third outlet ports when the port opening / closing shape portion is displaced relative to the first to third outlet ports by rotational displacement;
An electric actuator that rotationally drives the valve body in stages;
The valve body is configured to block only communication between the second outlet port, the third outlet port, and the valve chamber by the stepwise rotational drive by the electric actuator, so that only the first outlet port is provided. The first switching position that communicates with the valve chamber, the communication between the first outlet port and the third outlet port, and the valve chamber are cut off, and only the second outlet port communicates with the valve chamber. A second switching position; a third switching position that blocks all communication between the first outlet port, the second outlet port, and the third outlet port and the valve chamber; and the first outlet port. And a fourth switching position in which the communication between the second outlet port and the valve chamber is cut off and only the third outlet port is communicated with the valve chamber, the third outlet port and the valve chamber, The communication between the first outlet port and the first outlet Electric four-way switching valve, characterized in that the switching operation between the fifth switching position communicating both of the outlet ports of the valve chamber. The port opening and closing shape portion of the valve body has a rib-shaped partition wall section that is divided into an open region opened to the valve chamber and a non-open region that is not opened, and the non-open region surrounds the periphery. 2. The electric four-way switching valve according to claim 1 , wherein the electric four-way switching valve has a pocket shape surrounded by the rib-shaped partition wall. Refrigerant passage for supplying refrigerant from the discharge side of the compressor to the evaporator for the refrigerator compartment from the capillary tube for the refrigerator compartment through the condenser, and to the evaporator for the freezer compartment from the capillary tube for the freezer compartment via the condenser. A refrigerating cycle device for recirculating refrigerant from the freezer compartment evaporator and / or the refrigerating compartment evaporator to the suction side of the compressor,
The electric four-way switching valve according to claim 1 is interposed between the condenser and the capillary tube for the refrigerator compartment and the capillary tube for the freezer compartment,
A downstream side of the condenser is connected to the inlet port, an upstream side of the capillary tube for the refrigeration chamber is connected to the first outlet port, and an upstream side of the capillary tube for the freezer compartment is connected to the second outlet port. The suction side of the compressor is connected to the third outlet port by a bypass passage ,
The order of the operation mode obtained by switching the electric four-way switching valve is a refrigerator compartment priority cooling mode in which only the capillary tube for the refrigerator compartment is connected to the downstream side of the condenser,
Refrigerating room / freezing room full cooling mode in which the capillary tube for the refrigerating room and the capillary tube for the freezing room are both connected to the downstream side of the condenser.
Fully closed with no freezing chamber priority cooling mode in which only the freezing chamber capillary tube is connected to the downstream side of the condenser, and no freezing chamber capillary tube, refrigerating room capillary tube, or bypass passage is connected to the downstream side of the condenser. The refrigeration cycle apparatus characterized by the compressor stop mode depending on the state and the bypass mode in which only the bypass passage is connected to the downstream side of the condenser . A refrigerant passage for supplying refrigerant from the discharge side of the compressor to the evaporator from the first capillary tube through the condenser, and a second capillary having a decompression capacity different from that of the first capillary tube through the condenser. A refrigeration cycle apparatus having a refrigerant passage for supplying the evaporator from a tube and circulating the refrigerant from the evaporator to the suction side of the compressor,
The electric four-way switching valve according to claim 1 is interposed between the condenser and the first capillary tube and the second capillary tube.
A downstream side of the condenser is connected to the inlet port, an upstream side of the first capillary tube is connected to the first outlet port, and an upstream side of the second capillary tube is connected to the second outlet port. The suction side of the compressor is connected to the third outlet port by a bypass passage,
The order of operation modes obtained by switching the electric four-way switching valve is the first cooling mode in which only the first capillary tube is connected to the downstream side of the condenser, and the first capillary tube on the downstream side of the condenser. And a second cooling mode in which only the second capillary tube is connected to the downstream side of the condenser, and a first capillary on the downstream side of the condenser. The refrigeration is characterized in the order of the compressor stop mode in a fully closed state in which none of the tube, the second capillary tube, and the bypass passage are connected in communication, and the bypass mode in which only the bypass passage is connected downstream of the condenser. Cycle equipment.

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