JP2017082820A - Electromagnetic four-way selector valve and refrigeration cycle including the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an electromagnetic four-way selector valve capable of simplifying a piping system and a control system and reducing costs, capable of rapidly and surely performing switching operation, and capable of improving durability and energy saving performance.SOLUTION: Two electromagnetic coils 11, 12 are externally fitted to a single valve case 10 side by side, and electrification to the two electromagnetic coils 11, 12 is turned on/off to selectively drive two plungers 21, 22, thereby obtaining four modes: a one mode of opening two of three outflow ports p1, p2, p3, and three modes of opening only one of the three outflow ports p1, p2, p3.SELECTED DRAWING: Figure 1

Description

  The present invention relates to an electromagnetic four-way switching valve having one inflow port and three outflow ports and a refrigeration cycle having the same, and more particularly to one suitable for use in a vending machine or the like.

  For example, in a vending machine such as a beverage having three mutually independent rooms (insulation and cold storage), it is necessary to adjust the temperature of each room (cold-hot) according to the season (demand). In such vending machines, in order to cool and cool each room in a cold state, usually a compressor, a condenser (outdoor heat exchanger), three evaporators (indoor heat exchanger), an expansion valve and a capillary are used. A refrigeration cycle composed of throttling means such as a tube is used.

  In a vending machine using such a refrigeration cycle, for example, a mode in which two of the three chambers (R1, R2, R3) (for example, R1 and R2) are in a cold state and one of the three chambers is used. In order to be able to take a total of four modes including three modes in which only one is in a cold state, it is necessary to selectively distribute the high-pressure refrigerant from the condenser to the evaporator disposed in each chamber.

  Conventionally, a plurality of on-off valves, three-way switching valves, and the like are used for such distribution. However, when a plurality of valves are used in this way, the piping system becomes complicated, the occupied space increases, installation costs, parts costs, etc. increase, and power consumption also increases.

  In order to solve such a problem, Patent Document 1 proposes an electric four-way switching valve capable of performing the above-described distribution.

  Note that in a vending machine equipped with a refrigeration cycle as described above, each room (R1, R2, R3) is usually provided with an electric heater for heating and keeping warm (hot). The chambers R1, R2, and R3 can be arbitrarily selected to be cold using the refrigeration cycle or hot using the heater.

JP 2001-325651 A

However, the use of the electric four-way switching valve described in Patent Document 1 in the refrigeration cycle has the following problems.
(1) That is, the electric four-way switching valve using a stepping motor requires a dedicated controller, and the cost of the control system increases.
(2) Since an electric type using a stepping motor takes several seconds to make one rotation, it takes a longer time to switch the flow path than an electromagnetic type.
(3) Since the contact area and pressure receiving area of the valve element are large and the valve element is rotated while being pressed against the valve seat surface in high-pressure refrigerant, the valve element is subject to a large frictional resistance, and the valve element is likely to be worn. This is likely to cause problems in reliability, durability, and the like.

  The present invention has been made in view of the above circumstances. The object of the present invention is to simplify and reduce the cost of piping systems and control systems and to perform switching operations quickly and reliably. It is possible to provide an electromagnetic four-way switching valve capable of improving durability and energy saving, and a refrigeration cycle including the same.

  In order to achieve the above object, the electromagnetic four-way switching valve according to the present invention is basically fitted laterally and externally to a valve case having a valve chamber in which one inflow port and three outflow ports are opened. Two solenoid coils, two plungers installed in series in the valve case, and a first valve that opens and closes one of the three outflow ports in conjunction with one of the two plungers. A body, a second valve body that opens and closes the other of the three outflow ports in conjunction with the other of the two plungers, and the three outflow ports in conjunction with the two plungers. A third valve body that opens and closes the remaining one of them, and selectively opens / closes two of the three outflow ports by selectively turning on / off the current to the two electromagnetic coils. Mode and the three outflow ports Opening the only one is to be taken a total of four modes of the three modes.

  More specifically, the first electromagnetic coil and the second electromagnetic coil are fitted side by side and fixedly fitted to one end side of the valve case, and a first spring comprising a suction element and a compression coil spring, 1 plunger, the 2nd spring which consists of compression coil springs, and the 2nd plunger are built in series, and the 1st outflow port and the 2nd outflow port are arranged side by side in the valve seat side to the other end side from the 2nd plunger. And a second valve seat serving as a lid member having a third outflow port opened at the other end of the valve case. A valve chamber is defined between the second plunger and the second valve seat, and an inflow port is opened in the valve chamber, and the first and second plungers are interlocked with the first and second plungers, respectively. 2 Open outflow port The slide-type first valve body and the second valve body are brought into contact with the valve seat surface of the first valve seat, and the contact-and-separation-type third valve body is opened and closed to open and close the third outflow port. The third valve body is disposed opposite to the second valve seat, and the third valve body is constantly urged in the valve opening direction by a valve opening spring that is mounted between the third valve body and the second valve seat, The first plunger and / or the second plunger is configured to be pushed in the valve closing direction, and the first and second electromagnetic coils are selectively turned on / off to selectively turn on the first. In addition, a total of four modes, that is, one mode for opening two of the third outflow ports and three modes for opening only one of the first to third outflow ports can be taken.

  Further, the refrigeration cycle according to the present invention includes, for example, a compressor, a condenser, and three evaporators, and the above-described present invention is provided between the condenser and the three evaporators. The electromagnetic four-way switching valve is provided, the condenser and the inflow port in the electromagnetic four-way switching valve are connected, and the three outflow ports in the electromagnetic four-way switching valve are respectively an expansion valve or a throttle means. It is characterized by being connected to the three evaporators via

  In the electromagnetic four-way switching valve according to the present invention, by selectively turning ON / OFF the energization to the two electromagnetic coils, one mode for opening two of the three outflow ports, and the three outflow ports Four modes, including three modes that open only one of them, can be used, so when using multiple on-off valves, three-way switching valves, etc. for refrigerant distribution, or electric four-way switching Compared with the case of using a valve, the piping system and control system can be simplified and the cost can be reduced, the switching operation can be performed quickly and reliably, and durability and energy saving can be improved. .

  Further, the refrigeration cycle and the vending machine using the electromagnetic four-way switching valve having the above-described configuration have effects such as a simple flow path configuration and a control system.

  Problems, configurations, and operational effects other than those described above will be clarified by the following embodiments.

1 is an overall cross-sectional view with a partial plan view showing an embodiment (first mode state) of an electromagnetic four-way switching valve according to the present invention together with a refrigeration cycle in which it is used. It is a figure with which the structure and operation | movement description of a 1st valve body holder shown by FIG. 1 are used, (A) is a top view, (B) shows the state which has a 1st plunger in a non-attraction | suction position, (A) Sectional drawing according to a BB arrow line of (C), (C) is sectional drawing which shows the state which has a 1st plunger in a suction position. FIG. 3 is a diagram for explaining the configuration and operation around the third valve body and the second valve seat shown in FIG. 1, (A) is a partially enlarged cross-sectional view showing a state in which the third valve body is in a closed position; B) is a partially enlarged sectional view showing a state in which the third valve body is in the open position. It is a figure with which the structure and operation | movement description of a 2nd valve body holder shown by FIG. 1 are used, (A) is a top view, (B) shows the state which has a 2nd plunger in a non-attraction | suction position, (A) Sectional drawing according to the BB arrow line of (B), (C) is a sectional view showing a state where the second plunger is in the first suction position, (D) is a sectional view showing a state where the second plunger is in the second suction position, (E) is sectional drawing which follows the EE arrow line of (D). The whole sectional view with a partial top view showing one embodiment (the 2nd mode state) of an electromagnetic four-way selector valve concerning the present invention with the refrigerating cycle in which it was used. The whole sectional view with a partial top view showing one embodiment (the 3rd mode state) of an electromagnetic four-way selector valve concerning the present invention with the refrigerating cycle in which it was used. The whole sectional view with a partial top view showing one embodiment (the 4th mode state) of an electromagnetic four-way selector valve concerning the present invention with the refrigerating cycle in which it was used. The list which shows the state and position of each part of the electromagnetic four-way selector valve shown in FIG. 1 for each mode.

  Embodiments of the present invention will be described below with reference to the drawings.

  1, 5, 6, and 7 respectively use an embodiment of the electromagnetic four-way switching valve according to the present invention (first, second, third, and fourth mode states). It is a whole sectional view with a partial top view shown with a refrigerating cycle of a vending machine made.

  In the present specification, descriptions indicating positions and directions such as up and down, left and right, and front and rear are given for the sake of convenience in accordance with the drawings in order to avoid complicated explanation, and are actually incorporated in the refrigeration cycle. It does not necessarily indicate the position and direction at.

  In each drawing, the gap formed between the members, the separation distance between the members, etc. are larger than the dimensions of each constituent member for easy understanding of the invention and for convenience of drawing. Or it may be drawn small.

  The electromagnetic four-way switching valve 1 of the illustrated embodiment has a valve case 10 made of a cylindrical tube, and a first electromagnetic coil having the same winding number and winding direction, for example, on the outer periphery on the left end side of the cylindrical valve case 10. 11 and the second electromagnetic coil 12 are arranged side by side (in series). The valve case 10 includes, in order from the left end side, a suction element 15, a first spring 16 made of a compression coil spring, a first plunger 21, a second spring 17 made of a compression coil spring, and a second plunger 22 in series. Decorated. The left end portion of the valve case 10 is hermetically joined to the flange portion (outer peripheral terrace portion) of the suction element 15 by welding or the like. In addition, as the 1st electromagnetic coil 11 and the 2nd electromagnetic coil 12, the polarity or polar direction (+,-) of each coil should just be set to the same direction at the time of electricity supply, and the attraction | suction force is the same. Since there is no need, the number of windings and the winding direction of the conducting wire need not be the same.

  One end side plate-like portion of a coil case 18 having a cross-sectional groove shape in which the first electromagnetic coil 11 and the second electromagnetic coil 12 are housed is fixed to the attractor 15 by a bolt 19 screwed into the attractor 15. Thus, the first electromagnetic coil 11 and the second electromagnetic coil 12 are firmly fitted and fixed to the valve case 10. A common partition wall 18 a is provided at the center in the left-right direction of the coil case 18 so as to partition the first electromagnetic coil 11 and the second electromagnetic coil 12. Further, the outer peripheries of the electromagnetic coils 11 and 12 are sealed with a resin mold 13. Here, the 1st electromagnetic coil 11, the 2nd electromagnetic coil 12, and the common partition part 18a which partitions off the 1st electromagnetic coil 11 and the 2nd electromagnetic coil 12 are made into one coil by one molding (insert). It is configured.

  The first plunger 21 has an H-shaped cross section, the second plunger 22 has a concave shape, and the first plunger 21 and the second plunger 22 have a first valve body 31 and a second valve body, respectively. 32 (described later) is slidably disposed in the valve case 10 in an axial direction (a direction along the center line of the valve case 10), and the first spring 16 is provided with the suction element 15 and the first plunger 21. Between the first plunger 21 and the second plunger 22, and the second plunger 22 is contracted between the first plunger 21 and the second plunger 22. Is urged in the direction of separating the first plunger 21 from the first plunger 21. Here, the biasing force of the first spring 16 is set larger than the biasing force of the second spring 17.

  The right end portion of the first plunger 21 is made of a nonmagnetic material such as synthetic resin so as to prevent the first plunger 21 and the second plunger 22 from coming into direct contact, in other words, to leave a slight gap therebetween. A short cylindrical contact blocking member 24 is integrally coupled by press fitting, caulking, or the like (see FIGS. 5 and 7 for the contact blocking state). The contact blocking member is not limited to the one having the above configuration, and a sheet-like or plate-like member made of a non-magnetic material such as a synthetic resin is fixed to one of those surfaces that may come into contact. Or you may employ | adopt the structure of interposing between the surfaces which may contact.

  As will be described later, the first plunger 21 has a left end separated from the attractor 15 according to the energization state (ON / OFF) of the first electromagnetic coil 11 and the second electromagnetic coil 12 [X0]. (FIGS. 1 and 5) and the suction position [X1] (FIGS. 6 and 7) at which the left end is attracted to the suction element 15 can be taken selectively. In this example, when the first plunger 21 takes the non-attraction position [X0], its left end is located slightly to the left of the central portion of the first electromagnetic coil 11, and its right end is on the left side of the second electromagnetic coil 12. It is about 1/4.

  Further, as will be described later, the left end of the second plunger 22 is the most from the attractor 15 and the first plunger 21 according to the energization state (ON / OFF) to the first electromagnetic coil 11 and the second electromagnetic coil 12. The non-suction position [Y0] (FIGS. 1 and 6) moved away, and the first suction position [Y1] close to the first plunger 21 in the non-suction position [X0] (contacted with the contact blocking member 24) (FIG. 5) and the second suction position [Y2] (FIG. 7) approaching the first plunger 21 at the suction position [X1] (contacting the contact blocking member 24) can be selectively taken. Has been. In this example, when the second plunger 22 takes the non-attraction position [Y0], its left end is located near the center of the second electromagnetic coil 12, and its right end protrudes slightly to the right from the right end of the coil case 18. ing.

  On the other hand, a second valve seat 42 having a side-by-side protruding convex shape that also serves as a lid member is welded to the right end opening of the valve case 10 and a third outlet port p3 that is opened and closed by a third valve body 33 described later is opened. The valve chamber 40 is defined between the second plunger 22 and the second valve seat 42 in the valve case 10.

  Further, between the second plunger 22 and the second valve seat 42 in the valve case 10 (in the valve chamber 40), a first valve seat 41 whose upper surface is a flat valve seat surface is brazed or the like. The first outflow port p1 and the second outflow port p2 are opened from the left side of the valve seat surface of the first valve seat 41 sequentially from the left side with a predetermined interval, and the first An inflow port p10 is opened laterally (so as to open toward the right end side) at the right end portion of the valve seat 41. A metal filter 44 is fixed around the inflow port p10 at the right end of the first valve seat 41 by spot welding or the like. The first outflow port p1, the second outflow port p2, the inflow port p10, and the third outflow port p3 opened in the second valve seat 42 are communicated with the narrow tubes # 1, # 2, #, respectively. 10, # 3 (one end thereof) is hermetically inserted and fixed.

  On the valve seat surface of the first valve seat 41, a slide type first valve body 31 having a circular shape in plan view on the left side, and on the right side is longer than the first valve body 31 and is higher in height (thickness). A slide-type second valve body 32 having a racetrack shape in plan view and having a step is slidably brought into contact with each other.

  The first valve body 31 is for opening and closing the first outflow port p1, and a recess having a size capable of covering the first outflow port p1 from directly above is provided at a lower end portion thereof. The second valve body 32 is for opening and closing the second outflow port p2, and a lower end of the second valve body 32 is longer than that of the first valve body 31 and has a size that can cover the second outflow port p2 from directly above. Is provided.

  The first plunger 21 has a left end small diameter portion 55a of the first valve body holder 55 in which the large diameter portion 55b of the cylindrical left half 55A is slidably fitted to the second plunger 22 and the like. The plate-like right half 55B is integrally connected to the right end of the left half 55A.

  In the vicinity of the left end of the right half 55B of the first valve body holder 55 (the wide portion 55c having the same width as the large diameter portion 55b), as shown in FIG. 2 in addition to FIG. A round rectangular opening 57 is formed, and the first valve body 31 is fitted into the opening 57 so as to be slidable in the thickness direction. Also, an elongated rounded rectangular opening 58 having a size that does not interfere when the second valve body 32 slides in the left-right direction in conjunction with the second plunger 22 is formed near the center of the right half 55B. ing. Further, the right end side of the right half 55B is a narrow portion 55d, and the right end of the narrow portion 55d is brought into contact with and separated from a third valve body 33 described later in conjunction with the first plunger 21. .

  In addition, as can be understood by referring to FIG. 4 in addition to FIG. 1, the second plunger 22 has a left end portion (bifurcated portion 56 c) of the second valve body holder 56 having an inverted dish shape in cross section. It is connected and fixed by a pin or the like, and has a racetrack shape in plan view in which the upper part of the second valve body 32 is slidably fitted in the thickness direction at a position slightly to the right of the center of the second valve body holder 56. An opening 59 is formed. Further, the left end portion and the right end portion of the second valve body holder 56 are bifurcated portions 56c and 56d, and the right end of the right bifurcated portion 56d is linked to the second plunger 21 to a third valve body 33 described later. It comes to come and go.

  The left end portion of the wide portion 55c of the right half 55B of the first valve body holder 55 is fitted between the left forked portion 56c of the second valve body holder 56, and the right bifurcated shape of the second valve body holder 56 is inserted. The right end of the narrow portion 55d of the right half 55B of the first valve body holder 55 is fitted between the portions 56d, and the left end of the wide portion 55c of the right half 55B of the first valve body holder 55 and the second end. The left forked portion 56c of the valve body holder 56, the right end portion of the narrow width portion 55d of the right half 55B of the first valve body holder 55, and the right forked portion 56d of the second valve body holder 56 are: The guide portions are slidably fitted to each other (without interference) (for linear movement guide and lateral vibration suppression).

  Further, between the second valve body holder 56 and the first valve body 31 and the second valve body 32, the first valve body 31 and the second valve body 32 are respectively pressed in the thickness direction (on the first valve seat 41). Belleville springs 66 and 67 that are biased in the direction) are interposed.

  On the other hand, on the inner surface (left surface) side of the second valve seat 42 also serving as the lid member described above, as shown in an enlarged view in FIG. 3, the right end outer peripheral hook-shaped portion of the valve body guide tube 45 is fixed by spot welding or the like. The valve body guide cylinder 45 has a truncated and popping type (poppet type) third having a frustoconical valve body portion 33a that opens and closes the third outflow port p3 of the second valve seat 42 and opens and closes it. The valve body 33 is slidably inserted. The third valve body 33 is always urged in the valve opening direction by a valve opening spring 47 formed of a compression coil spring that is compressed between the third valve body 33 and the second valve seat 42. The guide tube 45 is latched and locked by a left end inner circumferential flange 45a. Further, the third valve body 33 is formed with a through groove 34 penetrating in the thickness direction for guiding the refrigerant introduced into the valve chamber 40 when the valve is opened to the third outflow port p3.

  As described above, the third valve body 33 is formed by the first valve body holder 55 (the narrow width portion 55d) inserted through the left end opening defined by the left end inner circumferential flange 45a of the valve body guide tube 45. The right end and the right end of the second valve element holder 56 (the bifurcated portion 56d) are pushed toward the second valve seat 42 side (right end side) against the urging force of the valve opening spring 47. .

  In addition to the above, the refrigeration cycle 100 of the vending machine using the electromagnetic four-way switching valve 1 of the present embodiment includes, for example, the compressor 5, the condenser 6, and the first chamber R1 and the second chamber 2 of the vending machine. Three evaporators E1, E2, and E3 respectively disposed in the chamber R2 and the third chamber R3 are provided, and the electromagnetic four-way switching valve 1 is provided between the condenser 6 and the three evaporators E1, E2, and E3. The condenser 6 and the inflow port p10 in the electromagnetic four-way switching valve 1 are connected, and the first outflow port p1, the second outflow port p2, and the third outflow port p3 are respectively connected via the expansion valve 7. Are connected to the three evaporators E1, E2, and E3.

  A fan (not shown) is disposed in the vicinity of the evaporators E1, E2, and E3 in each of the chambers R1, R2, and R3, and by blowing air from the fan to the evaporators E1, E2, and E3, It supplies to R2 and R3, and it is set as the state of cooling cold preservation (cold).

  Each room R1, R2, R3 is also provided with an electric heating heater (not shown) for heating and keeping warm (hot), and each room R1, R2, R3 is in a cold state. It is possible to arbitrarily select whether to be in a hot state.

  In the electromagnetic four-way switching valve 1 of the present embodiment configured as described above, the energization to the first and second electromagnetic coils 11 and 12 is selectively performed as shown in the list of FIG. By turning ON / OFF, the first mode in which two of the first, second, and third outflow ports p1, p2, and p3 are opened, and the first, second, and third outflow ports p1, p2, and p3 are set. A total of four modes, a second mode, a third mode, and a fourth mode, in which only one of them is opened can be used.

  This will be described in detail below.

<< First Mode = First Electromagnetic Coil 11: OFF, Second Electromagnetic Coil 12: OFF → FIG. 1 >>
When energization of the first electromagnetic coil 11 and the second electromagnetic coil 12 is both turned OFF, FIG. 1 (FIGS. 2A and 2B, FIG. 3A, and FIGS. 4A and 4B). As shown in FIG. 5, the biasing force of the first spring 16 and the second spring 17 provides the right end (the narrow width portion 55 d) of the first valve body holder 55 provided on the first plunger 21 and the second plunger 22. In addition, the right end (bifurcated portion 56d) of the second valve body holder 56 comes into contact with the third valve body 33 and pushes it to the position where the third outflow port p3 is closed to stop it. At this time, the second valve seat 42 serves as a stopper for the first plunger 21 and the second plunger 22.

  In such a state, the first plunger 21 and the second plunger 22 both take the non-suction positions [X0] and [Y0], which are the rightmost row positions. In the non-suction positions [X0] and [Y0], the first valve body 31 interlocked with the first plunger 21 opens the first outflow port p1, and the second valve body 32 interlocked with the second plunger 22 flows out of the second outflow. The port p2 is opened, and the third valve body 33 is in the state of closing the third outflow port p3 as described above, and the first mode is taken.

  In this first mode, the high-temperature and high-pressure refrigerant is guided from the compressor 5 to the condenser 6, where it is condensed by exchanging heat with outdoor air, and the high-pressure two-phase refrigerant from the condenser 6 is narrow tube # 10 → electromagnetic The inflow port p10 of the four-way switching valve 1 is passed through the valve chamber 40 and led to the first outflow port p1 and the second outflow port p2. The refrigerant guided to the first outflow port p1 is introduced into the expansion valve 7 through the thin tube # 1, the high pressure refrigerant is decompressed by the expansion valve 7, and the decompressed low pressure refrigerant is evaporated in the first chamber R1. Then, the refrigerant is evaporated by exchanging heat with room air (cooling) and evaporating, and low-temperature and low-pressure refrigerant is returned from the evaporator E1 to the suction side of the compressor 5.

  Similarly, the refrigerant guided to the second outflow port p2 is introduced into the expansion valve 7 through the thin tube # 2, and the high pressure refrigerant is reduced by the expansion valve 7, and the reduced low pressure refrigerant is supplied to the second chamber. It is led to the evaporator E2 of R2, where it evaporates by heat exchange (cooling) with room air, and the low-temperature and low-pressure refrigerant is returned from the evaporator E2 to the suction side of the compressor 5.

  As described above, in the first mode, the two chambers, the first chamber R1 and the second chamber R2, are cooled and kept cold.

<< Second Mode = First Electromagnetic Coil 11: OFF, Second Electromagnetic Coil 12: ON → FIG. 5 >>
When the energization to the first electromagnetic coil 11 is turned off and the energization to the second electromagnetic coil 12 is turned on, FIG. 5 (FIGS. 2A, 2B, 3A, and 4C). As shown in FIG. 5, the first plunger 21 has a magnetic pulling force generated by the magnetic field of the second electromagnetic coil 12 and the urging force of the first spring 16 to be larger than the urging force of the second spring 17, and the rightward force> Since this is a leftward force, the right end (narrow width portion 55d) of the first valve body holder 55 provided on the first plunger 21 contacts the third valve body 33 and closes the third outflow port p3. The first plunger 21 remains in the non-suction position [X0], which is the rightmost row position, while the second plunger 22 is in the magnetic field of the second electromagnetic coil 12. The magnetic attraction force due to is greater than the biasing force of the second spring 17 and goes right <Because of the leftward force, the left side is moved from the non-suction position [Y0] (the right end (bifurcated portion 56d) of the second valve body holder 56 is separated from the third valve body 33) and the non-suction position [X0 ] Is taken close to the first plunger 21 (contacted with the contact blocking member 24), the first suction position [Y1].

  In such a state, the first valve body 31 interlocked with the first plunger 21 opens the first outflow port p1, but the second valve body 32 interlocked with the second plunger 22 closes the second outflow port p2, and the above Thus, the third valve body 33 is in a state of closing the third outflow port p3, and the second mode is taken.

  In this second mode, the high-temperature and high-pressure refrigerant is guided from the compressor 5 to the condenser 6, where it is condensed by exchanging heat with outdoor air, and the high-pressure two-phase refrigerant from the condenser 6 is narrow tube # 10 → electromagnetic The refrigerant guided to the first outflow port p1 through the inflow port p10 → the valve chamber 40 of the four-way switching valve 1 and guided to the first outflow port p1 is introduced into the expansion valve 7 through the thin tube # 1. The high-pressure refrigerant is decompressed by the expansion valve 7, and the decompressed low-pressure refrigerant is guided to the evaporator E1 in the first chamber R1, where it evaporates through heat exchange (cooling) with room air, and the evaporator E1 The low-temperature and low-pressure refrigerant is returned to the suction side of the compressor 5.

  As described above, in the second mode, only the first chamber R1 is cooled and kept cold.

<< Third Mode = First Electromagnetic Coil 11: ON, Second Electromagnetic Coil 12: OFF → FIG. 6 >>
When the energization of the first electromagnetic coil 11 is turned on and the energization of the second electromagnetic coil 12 is turned off, FIG. 6 (FIGS. 2C, 3A, and 4A, 4B). As shown in FIG. 4, the first plunger 21 is not attracted because the magnetic attractive force due to the magnetic field of the first electromagnetic coil 11 is greater than the urging force of the first spring 16 and the rightward force <the leftward force. To move left from the position [X0] (the right end (narrow width portion 55d) of the first valve body holder 55 is separated from the third valve body 33) and take the suction position [X1] attracted to the suction element 15 On the other hand, since the urging force of the second spring 17 is greater than the magnetic attraction force due to the magnetic field of the first electromagnetic coil 12, the second plunger 22 is provided on the second plunger 22 so that the rightward force is greater than the leftward force. The right end (bifurcated portion 56d) of the second valve body holder 56 abuts against the third valve body 33, which is connected to the third flow body. The port p3 closed by pushing to the position in a state of stopping, the second plunger 22 will remain taking the non-suction position is the most rightward position [Y0].

  In such a state, the first valve body 31 interlocked with the first plunger 21 closes the first outflow port p1, but the second valve body 32 interlocked with the second plunger 22 opens the second outflow port p2, and the above Thus, the third valve body 33 is in a state of closing the third outflow port p3, and the third mode is taken.

  In this third mode, the high-temperature and high-pressure refrigerant is led from the compressor 5 to the condenser 6, where it is condensed by exchanging heat with the outdoor air, and the high-pressure two-phase refrigerant from the condenser 6 is narrow tube # 10 → electromagnetic The refrigerant guided to the second outflow port p2 through the inflow port p10 → the valve chamber 40 of the four-way switching valve 1 and introduced into the second outflow port p2 is introduced into the expansion valve 7 through the thin tube # 2. The high-pressure refrigerant is decompressed by the expansion valve 7, and the decompressed low-pressure refrigerant is guided to the evaporator E2 in the second chamber R2, where it evaporates through heat exchange (cooling) with room air, and the evaporator E2 The low-temperature and low-pressure refrigerant is returned to the suction side of the compressor 5.

  As described above, in the third mode, only the second chamber R2 is cooled and kept cold.

<< Fourth Mode = First Electromagnetic Coil 11: ON, Second Electromagnetic Coil 12: ON → FIG. 7 >>
When energization of the first electromagnetic coil 11 is turned on and energization of the second electromagnetic coil 12 is also turned on, as shown in FIG. 7 (FIGS. 2C, 3B, and 4D). In addition, the magnetic field of the first electromagnetic coil 11 and the magnetic field of the second electromagnetic coil 12 are combined (combined magnetic field), and the first plunger 21 has a magnetic attraction force by the combined magnetic field larger than the urging force of the first spring 16. Since the rightward force <the leftward force, leftward from the non-suction position [X0] (the right end (narrow width portion 55d) of the first valve body holder 55 is separated from the third valve body 33), suction is performed. The attracting position [X1] attracted to the child 15 is taken, and the second plunger 22 also has a magnetic attraction force by the combined magnetic field larger than the urging force of the second spring 17, and the right-hand force <the left-hand force. Therefore, left from the non-suction position [Y0] (the right end of the second valve element holder 56 (the bifurcated portion 56d There away from the third valve body 33), taking brought close to the first plunger 21 in the suction position [X1] (was brought into contact with the contact blocking member 24) the second suction position [Y2].

  In such a state, the first valve body 31 interlocked with the first plunger 21 closes the first outflow port p1, and the second valve body 32 interlocked with the second plunger 22 closes the second outflow port p2. As described above, since the right end (narrow portion 55d) of the first valve body holder 55 and the right end (bifurcated portion 56d) of the second valve body holder 56 are separated from the third valve body 33, the third valve body 33 is opened. The third outflow port p3 is opened by the urging force of the valve spring 47, and the valve body 47 is locked by the left inner peripheral flange 45a of the valve element guide tube 45, and the fourth mode is taken.

  In the fourth mode, the high-temperature and high-pressure refrigerant is led from the compressor 5 to the condenser 6, where it is condensed by exchanging heat with outdoor air, and the high-pressure two-phase refrigerant from the condenser 6 is narrow tube # 10 → electromagnetic Of the four-way switching valve 1 through the inflow port p10 → the valve chamber 40, through the through groove 34 formed in the third valve body 33, and only to the third outflow port p3, and into the third outflow port p3. The refrigerant is introduced into the expansion valve 7 through the thin tube # 3, and the high pressure refrigerant is decompressed by the expansion valve 7, and the decompressed low pressure refrigerant is guided to the evaporator E3 in the third chamber R3, where The refrigerant evaporates by heat exchange (cooling) with air, and low-temperature and low-pressure refrigerant is returned from the evaporator E3 to the suction side of the compressor 5.

  As described above, in the fourth mode, only the third chamber R3 is cooled and kept cold.

  As described above, in the electromagnetic four-way switching valve 1 of the present embodiment, the first, second, and third outflow ports are selectively turned ON / OFF to the first and second electromagnetic coils 11 and 12. a first mode in which two of p1, p2, and p3 (here, the first outflow port p1 and the second outflow port p2) are opened, and the first, second, and third outflow ports p1, p2, and p3 Since a total of four modes of the second, third, and fourth modes that open only one of them can be taken, when a plurality of on-off valves, three-way switching valves, etc. are used for refrigerant distribution, Compared to the case of using an electric four-way switching valve, the piping system and control system can be simplified and the cost can be reduced, and the switching operation can be performed quickly and reliably, resulting in durability and energy saving. Can also be improved.

  Further, the refrigeration cycle 100 and the vending machine using the electromagnetic four-way switching valve 1 having the above-described configuration have effects such as a simple flow path configuration and a control system.

DESCRIPTION OF SYMBOLS 1 Electromagnetic four way switching valve 10 Valve case 11 1st electromagnetic coil 12 2nd electromagnetic coil 15 Attractor 16 1st spring 17 2nd spring 21 1st plunger 22 2nd plunger 24 Contact prevention member 31 1st valve body 32 2nd Valve body 33 Third valve body 40 Valve chamber 41 First valve seat 42 Second valve seat 55 First valve body holder 56 Second valve body holders p1, p2, p3 First, second, third outflow port p10 Inflow port 100 refrigeration cycle

Claims (15)

Two electromagnetic coils that are fitted laterally and externally to a valve case having a valve chamber in which one inflow port and three outflow ports are open, two plungers that are serially mounted in the valve case, and the two A first valve body that opens and closes one of the three outflow ports in conjunction with one of the two plungers, and another of the three outflow ports in conjunction with the other of the two plungers. A second valve body that opens and closes one of the two, and a third valve body that opens and closes the remaining one of the three outflow ports in conjunction with the two plungers,
By selectively turning on / off energization to the two electromagnetic coils, one mode for opening two of the three outflow ports and three for opening only one of the three outflow ports. Electromagnetic four-way switching valve designed to be able to take a total of four modes with one mode. A first electromagnetic coil and a second electromagnetic coil are fitted side by side on one end side of the valve case, and a first spring comprising a suction element and a compression coil spring, a first plunger, and a compression coil spring are sequentially arranged from the one end side. The second spring and the second plunger are arranged in series, and the first outflow port and the second outflow port are opened side by side on the valve seat surface on the other end side from the second plunger. And a second valve seat serving as a lid member having a third outflow port opened at the other end of the valve case, and the second plunger and the second plunger in the valve case. A valve chamber is defined between the two valve seats, and an inflow port is opened in the valve chamber.
The slidable first valve body and the second valve body are brought into contact with the valve seat surface of the first valve seat so as to open and close the first and second outflow ports, respectively, in conjunction with the first and second plungers. And a third valve body that is contacted and separated to open and close the third outflow port is disposed opposite to the second valve seat,
The third valve body is constantly urged in the valve opening direction by a valve opening spring that is compressed between the third valve body and the second valve seat, and the first plunger and / or the first valve body. It is configured to be pushed in the valve closing direction by two plungers,
A mode in which two of the first to third outflow ports are opened by selectively turning on / off energization of the first and second electromagnetic coils, and the first to third outflow ports; An electromagnetic four-way switching valve designed to be able to take a total of four modes, with three modes opening only one of them.   A first valve body holder for pushing and pulling the first valve body or the second valve body and pushing the third valve body is provided on the other end side of the first plunger, and the second plunger The second valve body holder for pushing and pulling the second valve body or the first valve body and pushing the third valve body on the other end side is provided. Electromagnetic four-way switching valve. When the energization of both the first and second electromagnetic coils is turned off, the first and second plungers both come into contact with the third valve body by the biasing force of the first and second springs. Taking the non-suction position pushed to the valve closing position, thereby opening both the first and second outlet ports,
When energization to the first electromagnetic coil is turned off and energization to the second electromagnetic coil is turned on, the first plunger resists the non-suction position and the second plunger resists the biasing force of the second spring. Taking the first suction position on the side of the suction element from the non-suction position, whereby only the first outflow port or the second outflow port is opened,
When the energization to the second electromagnetic coil is turned off and the energization to the first electromagnetic coil is turned on, the second plunger resists the non-suction position and the first plunger resists the biasing force of the first spring. Taking the suction position on the side of the suction element from the non-suction position, whereby only the second outflow port or the first outflow port is opened,
When energization of both the first and second electromagnetic coils is turned on, the first plunger resists the biasing force of the first spring, and the suction position on the side of the attractor from the non-suction position, the second plunger Takes a second suction position closer to the suction element than the first suction position against the urging force of the second spring, whereby only the third outflow port is opened. The electromagnetic four-way switching valve according to claim 3,   One end of a first valve body holder, one end of which is slidably fitted to the second plunger, is connected and fixed to the first plunger, and the other end of the first valve body holder is connected to the first plunger. The electromagnetic according to any one of claims 2 to 4, wherein the one valve body or the second valve body is connected, fitted, or engaged so as to be pushed and pulled by the first plunger. Formula four-way switching valve.   6. The other end of the first valve body holder is configured to push and move the third valve body in contact with and away from the third valve body in conjunction with the first plunger. The electromagnetic four-way selector valve described in 1.   One end of a second valve body holder is connected and fixed to the second plunger, and the second valve body or the first valve body is pushed against the second plunger on the other end side of the second valve body holder. The electromagnetic four-way switching valve according to claim 5 or 6, wherein the electromagnetic four-way switching valve is connected, fitted, or engaged so as to be pulled.   8. The other end of the second valve body holder is adapted to push and move the third valve body in contact with and away from the third valve body in conjunction with the second plunger. The electromagnetic four-way selector valve described in 1.   9. A contact blocking member made of a non-magnetic material is interposed between the first plunger and the second plunger so as to prevent direct contact between the first plunger and the second plunger. An electromagnetic four-way switching valve according to claim 1.   The electromagnetic four-way switching valve according to any one of claims 2 to 9, wherein the inflow port is opened laterally at the other end of the first valve seat.   The electromagnetic four-way switching valve according to any one of claims 2 to 10, wherein the valve case is made of a cylindrical tube.   The first electromagnetic coil, the second electromagnetic coil, and the common partition wall partitioning the first electromagnetic coil and the second electromagnetic coil are configured as one coil by one molding. The electromagnetic four-way switching valve according to any one of claims 2 to 11.   The electromagnetic four-way switching valve according to any one of claims 2 to 12, wherein the first and second electromagnetic coils have the same polarity when energized. A refrigeration cycle comprising a compressor, a condenser, and three evaporators,
The electromagnetic four-way switching valve according to any one of claims 1 to 13 is provided between the condenser and the three evaporators, and the condenser and the inlet port of the electromagnetic four-way switching valve are connected to each other. The refrigeration cycle is characterized in that the three outflow ports of the electromagnetic four-way switching valve are connected to the three evaporators via expansion valves or throttle means, respectively. A vending machine using the refrigeration cycle according to claim 14.

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