CN106545670A

CN106545670A - Direct-acting electromagnetic valve and the four-way switching valve possessed as guide valve

Info

Publication number: CN106545670A
Application number: CN201610674072.3A
Authority: CN
Inventors: 小岛正至; 木船仁志; 森田纪幸
Original assignee: Fujikoki Corp
Current assignee: Fujikoki Corp
Priority date: 2015-09-18
Filing date: 2016-08-16
Publication date: 2017-03-29
Anticipated expiration: 2036-08-16
Also published as: CN106545670B; JP2017057977A; JP6556000B2

Abstract

The present invention provides a kind of direct-acting electromagnetic valve and possesses its four-way switching valve, from warming operation to defrosting operating and when switching from defrosting operating to warming operation, it is not necessary to too big reduction compressor frequency, can just be effectively reduced noise, and can switch rapidly.According to the voltage applied to direct-acting electromagnetic valve (50) solenoid (51), first plunger (61) and the second plunger (62) are respectively at attraction position and non-attraction position, another end position connected with this end position of the first valve element of linkage (71) in port (p1) and port (p2) is connected and by port (p2) and port (p3), the closed position of open position and close port (p4) of second valve element in port (p4) is opened, from defrosting operating to warming operation and when switching from warming operation to defrosting operating, second valve element (72) is in an open position, the reduced pressure of main valve chamber (12) is to predetermined pressure.

Description

Direct-acting electromagnetic valve and the four-way switching valve possessed as guide valve

Technical field

The present invention relates to be used for the four-way switching of the guide type of stream switching among a kind of heat pump type refrigerating heating system etc. Valve, direct-acting electromagnetic valve in particular to the noise occurred during the operating switching being effectively reduced before and after defrosting operating, with And the four-way switching valve possessed as guide valve.

Background technology

In general, the heat pump type refrigerating heating system such as room conditioning, air conditioning for automobiles, except possessing compressor, outdoor heat Outside exchanger, indoor heat converter and expansion valve etc., it is also equipped with cutting as the four-way of stream (flow direction) switching part Change valve.

Reference picture 23A, Figure 23 B is carried out to an example of the heat pump type refrigerating heating system for possessing this kind of four-way switching valve Simple declaration.The heat pump type refrigerating heating system 200 of illustrated example, is formed through the four-way switching valve as flow channel switching valve 240 carrying out the switching of cooling operation (and defrosting operating) and warming operation, substantially possesses compressor 210, outdoor heat exchange Device 220, indoor heat converter 230 and expansion valve 260, in the exhaust end and suction side, outdoor heat converter of compressor 210 220th, and between indoor heat converter 230 configure with 4 ports, namely exhaust end high pressure port D, outside in-out end Mouth C, indoor pass in and out the four-way switching valve 240 of port E and suction side low-pressure port S.

Connected by the stream of the formation such as conduit (pipeline) between each above-mentioned machine, in cooling operation, such as schemed Shown in 23A, exhaust end high pressure port D of four-way switching valve 240 is connected with outside turnover port C, in addition, indoor in-out end Mouth E is connected with suction side low-pressure port S.With this, cold-producing medium is inhaled into compressor 210, and from the high temperature of compressor 210 The cold-producing medium of high pressure is directed to outdoor heat converter 220 by four-way switching valve 240, there carries out hot friendship with outdoor air Change and condense, become the two phase refrigerant of high pressure and be directed to expansion valve 260.High-pressure refrigerant is reduced pressure by the expansion valve 260, Low pressure refrigerant after decompression is directed to indoor heat converter 230, heat exchange (refrigeration) is there carried out with room air and Evaporation, the cold-producing medium from the low-temp low-pressure of indoor heat converter 230 are returned to compressor 210 by four-way switching valve 240 Suction side.

In contrast to this, in warming operation, as shown in fig. 23b, exhaust end high pressure port D of four-way switching valve 240 and room Inner side turnover port E connections, in addition, outside turnover port C is connected with suction side low-pressure port S, the cold-producing medium of High Temperature High Pressure Indoor heat converter 230 is directed to from compressor 210, there heat exchange (heating) is carried out with room air and is condensed, become Into high pressure two phase refrigerant and be directed to expansion valve 260.High-pressure refrigerant is reduced pressure by the expansion valve 260, low after decompression Compression refrigerant is directed to outdoor heat converter 220, there carries out heat exchange with outdoor air and evaporates, and hands over from outdoor heat The cold-producing medium of the low-temp low-pressure of parallel operation 220 is returned to the suction side of compressor 210 by four-way switching valve 240.

In the warming operation, in the past, as needed (usually regularly), to will be attached to outdoor heat converter 220 On frost remove (thawing), in short time by the circulation contrary with the warming operation, namely by with cooling operation identical Circulate and make refrigerant cycle, outdoor heat converter 220 is generated heat and is carried out defrosting operating, the defrosting operating is extensive again after terminating Warming operation is arrived again.

But, when switching from warming operation to defrosting operating while switching (stream), the port that high-pressure refrigerant is flowed into from Indoor passes in and out port E to outside turnover port C switchings, when switching from defrosting operating to warming operation, high-pressure refrigerant stream The port for entering passes in and out port C to indoor turnover port E switchings from opposite to that outside.Then, in the switching, two ends The aperture area of mouth drastically changes, and the cold-producing medium of high pressure is flowed into the port (conduit) of low-pressure side quickly, in the system There is pressure change drastically in 200, and produce the problem of the noise (switching sound) for occurring big.

To reduce the noise, in the prior art, as such as disclosed in patent documentation 1,2 etc., in above-mentioned operating During switching, compressor is stopped or is gradually lowered the frequency (revolution) of compressor, reduce the pressure of high-pressure side and low-pressure side After difference (being reduced to the degree that above-mentioned noise can be allowed), then the switching of (stream) of being operated.

Patent documentation 1：Japanese Unexamined Patent Publication 6-247135 publication

Patent documentation 2：Japanese Unexamined Patent Publication 2003-240391 publications

The content of the invention

But, as described above, when switching from warming operation to defrosting operating, compressor is stopped or is reduced compression The frequency (revolution) of machine, and in the case of being gradually reduced the pressure differential of high-pressure side and low-pressure side, although noise can be reduced, but There is problems with：It is substantially elongated to the time actually entered required for defrosting operating from warming operation, also, with from defrosting Operate to warming operation switch when it is same, the high pressure required for the pressure of cold-producing medium is returned to needs long-time, and warm air is from room Inside heat exchanger out till need long-time.

The present invention is completed in view of the foregoing, be its object is to provide a kind of direct-acting electromagnetic valve and is made The four-way switching valve possessed for guide valve, is switching from warming operation to defrosting operating and from defrosting operating to warming operation When, it is not necessary to too big reduction compressor frequency, noise can be just effectively reduced, and can be carried out from warming operation to defrosting rapidly Operate and from defrosting operating to the switching of warming operation.

To reach above-mentioned purpose, direct-acting electromagnetic valve involved in the present invention is substantially formed in the following manner：At one end The outer valve casing for being fixed with solenoid in side periphery, start to be sequentially connected in series from a side be configured with attraction part, the first plunger and Second plunger, also, the part in second plunger is provided with the outside by first plunger and to the suction unit The extension that part side extends, the area of the close described attraction component side of the extension are formed as leaning on than first plunger The nearly area for attracting component side is little, and the more another side of the second plunger described in the ratio in the valve casing is provided with master port, and Be provided with the valve seat with first, second, third and fourth port, in the valve seat, be by first, second, and third port it Between connected state switch over and in the way of sliding freely to be connected to first plunger linkage the first valve element, and And, it is the 4th port to be switched and is docked in the way of sliding freely or by can be away from being configured with the way of close With the second valve element of second plunger linkage, according to the voltage applied to the solenoid, first plunger and described First valve element and second plunger and second valve element are respectively at multiple positions.

In specific embodiment still more preferably, direct-acting electromagnetic valve is to be formed in the following manner：Side at one end The outer valve casing for being fixed with solenoid in periphery, start to be sequentially connected in series from a side be configured with attraction part, by collapse coil bullet The first spring, the first plunger, the second spring being made up of collapse coil spring and the second plunger that spring is constituted, also, described A part for second plunger is provided with the outside by first plunger and to the extension for attracting component side to extend, described The area of the close described attraction component side of extension is formed as the face of the close described attraction component side than first plunger Product is little, is to prevent first plunger and second plunger from being provided with the first locating part and second spacing to another side movement Part, the more another side of the second plunger described in the ratio in the valve casing are provided with high pressure and import port, and be provided with first, the Two and the 3rd port and the valve seat of the 4th port, in the valve seat, are by the connection between first, second, and third port State is switched over and to being connected to by the first valve element of the slidingtype of the first plunger push-and-pull in the way of sliding freely, and And, it is to be switched and the 4th port to being connected to by the slidingtype of the second plunger push-and-pull in the way of sliding freely The second valve element or by can be away from the second valve element that hoisting type is configured with the way of close, according to applying to the solenoid Plus voltage, first plunger and second plunger are respectively at attraction position and non-attraction position, first valve element Link with first plunger and be in the end position for making the first port and the second port connects and described in making Another end position that second port is connected with the 3rd port, also, second valve element link with second plunger and Open position and the closed position being turned off in the 4th port is opened.

In preferred embodiment, direct-acting electromagnetic valve is formed in the following manner：Stopping to the solenoid In the state of being only powered, by first spring and the force of the second spring, first plunger is in described the One locating part abut locking non-attraction position, also, second plunger in abuts with second locating part engage Non- attraction position, with this, first valve element is in another end position, also, second valve element is in the closing Position, in this condition, if to the solenoid apply first voltage, first plunger still in described first limit Position part abuts the non-attraction position of locking, and second plunger is resisted the force of the second spring and is in first post Plug layback is near and the extension and the attraction position for attracting part to abut, and with this, first valve element is still in described Another end position, second valve element are in the open position, in this condition, if applying than described to the solenoid The high second voltage of first voltage, then first plunger resist the force of first spring and be in by the attraction part The attraction position furthered, but second plunger is still in the attraction position, and with this, first valve element is in described one end Position, also, second valve element is still in the open position, in this condition, if applying to compare institute to the solenoid The low tertiary voltage of the first and second voltages is stated, then first plunger is still maintained at by the captivation for attracting part The attraction position, second plunger are returned to the non-attraction position by the force of the second spring, with this, First valve element is returned to the closed position still in an end position, second valve element.

In other preferred embodiments, direct-acting electromagnetic valve is formed in the following manner：To the electromagnetic wire Circle applies the tertiary voltage, first plunger and is still maintained at the attraction potential by the captivation for attracting part Put, and second plunger also still in the non-attraction position in the state of, if applying described the to the solenoid Two voltages, then first plunger be still maintained at the attraction position, second plunger resists applying for the second spring Power and be in the first plunger layback is near and the extension and the attraction position for attracting part to abut, with this, institute The first valve element is stated still in an end position, second valve element is in the open position, afterwards, if to the electromagnetic wire Circle stops being powered, then first plunger is returned to the non-attraction position by the force of first spring, also, Second plunger is returned to the non-attraction position by the force of the second spring, with this, first valve element Another end position is returned to, also, second valve element is returned to the closed position.

In other preferred embodiments, in a side of the attraction part of the valve casing, it is configured with forever Magnet.

In specific embodiment still more preferably, direct-acting electromagnetic valve is formed in the following manner：To the electricity In the state of magnetic coil stops being powered, by first spring and the force of the second spring, first plunger is in The non-attraction position of locking, also, second plunger are abutted with first locating part in supporting with second locating part The non-attraction position of locking is connect, with this, first valve element is in another end position, also, second valve element is in The closed position, in this condition, if to the solenoid apply first voltage, first plunger still in institute The non-attraction position that the first locating part abuts locking is stated, second plunger is resisted the force of the second spring and is in institute State near the first plunger layback and the extension and the attraction position for attracting part to abut, with this, first valve element is still In another end position, second valve element is in the open position, in this condition, if applying to the solenoid Plus the second voltage higher than the first voltage, then first plunger resist the force of first spring and be in described The attraction position for attracting part to further, but second plunger is still in the attraction position, and with this, first valve element is in One end position, also, second valve element is still in the open position, in this condition, if to the solenoid Stop being powered, then first plunger is still maintained at the attraction position, second post by the magnetic force of the permanent magnet Plug is returned to the non-attraction position by the force of the second spring, and with this, first valve element is still in described One end position, second valve element are returned to the closed position.

In other preferred embodiments, direct-acting electromagnetic valve is formed in the following manner：To the electromagnetic wire Circle stops being powered, first plunger is still maintained at the attraction position and described the by the magnetic force of the permanent magnet Two plungers also still in the non-attraction position in the state of, it is if applying the second voltage to the solenoid, described First plunger is still maintained at the attraction position, and second plunger is resisted the force of the second spring and is in described First plunger layback is near and the extension and the attraction position for attracting part to abut, and with this, first valve element is still located In an end position, second valve element is in the open position, afterwards, if applying opposite polarity to the solenoid Tertiary voltage, then the magnetic force of the permanent magnet be cancelled, first plunger is returned by the force of first spring The non-attraction position is returned to, also, second plunger is returned to the non-suction by the force of the second spring Draw position, with this, first valve element is returned to another end position, also, second valve element be returned to it is described Closed position, afterwards, if stopping being powered to the solenoid, first plunger maintains the non-attraction position, described Second plunger maintains the non-attraction position, first valve element to maintain another end position, second valve element to maintain institute State closed position.

On the other hand, a kind of four-way switching valve involved in the present invention, is used in heat pump type refrigerating heating system For switching the four-way switching valve of the slidingtype of cold-producing medium flow direction, the heat pump type refrigerating heating system is freezing Operating, warming operation and cold-producing medium is carried out into the mode of selection to the defrosting operating with identical direction flowing during cooling operation And formed, it is characterised in that constitute in the following manner：Possess the direct-acting electromagnetic valve of said structure as guide valve, and Possess the four-way valve body of cylinder type, in the four-way valve body, start to be configured with the first operating room, the first work successively from a side Plug, main valve chamber, second piston, the second operating room, are provided with the exhaust end height being connected with the exhaust end of compressor in the main valve chamber Pressure side mouth, and be provided with main valve seat, in the valve seat of the main valve seat, is started to be sequentially provided with from a side and is connected with outdoor heat converter Outside turnover port and the compressor suction side connection suction side low-pressure port and and indoor heat converter The indoor turnover port of connection, and to being connected to section as the bowl-shape main valve plug that stands upside down, the main valve plug in the way of sliding freely Can selectively in by the outside turnover port open and enter the suction side low-pressure port and the indoor The refrigeration position of exit port connection and the suction side low-pressure port and described is opened and made in indoor turnover port The heating position of outside turnover port connection, the high pressure of the direct-acting electromagnetic valve import port with exhaust end height Pressure side mouth connects, and the first port is connected with first operating room, the second port and the suction side low-pressure port Connection, the 3rd port is connected with second operating room, also, the 4th port is connected with the suction side low-pressure port Connect, when switching when switching from defrosting operating to warming operation and from warming operation to defrosting operating, make the direct drive type electro Open position of second valve element of magnet valve in the 4th port is opened, enables the pressure of the main valve chamber to reduce To predetermined pressure.

Another kind of four-way switching valve involved in the present invention, be used in heat pump type refrigerating heating system for switching The revolving four-way switching valve of cold-producing medium flow direction, the heat pump type refrigerating heating system is can be by cooling operation, heating Operate and cold-producing medium carried out into the mode of selection to the defrosting operating with identical direction flowing during cooling operation and is formed, Characterized in that, constituting in the following manner：Possess the direct-acting electromagnetic valve of said structure as guide valve, and possess main valve, The main valve has：The main valve case of the tubular of graduation main valve chamber；The main valve plug of the main valve chamber is configured in rotatably； And for it is making that the main valve plug rotates, with high-pressure refrigerant is selectively imported or the variable volume discharged the One operating room and the actuator of the second operating room, are provided with the exhaust end high pressure being connected with the exhaust end of compressor in the main valve case The outside turnover port of port and outdoor heat converter connection and the suction side low pressure of the suction side connection of the compressor Port and the indoor turnover port being connected with indoor heat converter, by controlling high-pressure refrigerant to the described first work The importing of room and second operating room is discharged and rotates the main valve plug, and carries out the switching between communications ports, with This is carried out from refrigeration or defrosting operating to warming operation and from warming operation to the switching of refrigeration or defrosting operating, described straight The high pressure of type solenoid valve is imported port and is connected with the exhaust end high pressure port, the first port and first work Make room connection, the second port is connected with the suction side low-pressure port, and the 3rd port is connected with second operating room Connect, also, the 4th port be connected with the suction side low-pressure port, when switching from defrosting operating to warming operation, with And when switching from warming operation to defrosting operating, second valve element of the direct-acting electromagnetic valve is in the 4th end The open position that mouth is opened, enables the pressure of the main valve chamber to be reduced to predetermined pressure.

It is in the following manner using the four-way switching valve that direct-acting electromagnetic valve involved in the present invention possesses as guide valve Constitute：When switching when switching from defrosting operating to warming operation and from warming operation to defrosting operating, direct driving type electromagnetic is made Second valve element of valve is in an open position, makes the pressure of main valve chamber be gradually lowered to predetermined pressure, so, from warming operation to Defrosting operating and when switching from defrosting operating to warming operation, it is not necessary to the too big frequency for reducing compressor, it becomes possible to reduce high Pressure side and the pressure differential of low-pressure side, therefore, it is possible to be effectively reduced noise, and can shorten the pressure of cold-producing medium return to it is required High pressure and time for needing, with as it does so, can shorten from warming operation to into the time required for defrosting operating and warm sky Gas from indoor heat converter out till time.

Like this, according to the present invention, among heat pump type refrigerating heating system, noise can be reduced promptly Carry out from warming operation to defrosting operating and from defrosting operating to the switching of warming operation, add, it is not necessary to which the present invention is involved And direct-acting electromagnetic valve beyond electromagnetic valve, so based on fairly simple structure, cooling operation, warming operation can be carried out And defrosting operating, it is possible to reducing setup cost and component costs.

In addition, among direct-acting electromagnetic valve involved in the present invention, being provided with by first in a part for the second plunger The outside of plunger the extension extended to attraction component side (side), so, magnetic effect is uprised, and with this, is being carried out from confession Warm operating makes the switching action of direct-acting electromagnetic valve become to hold to defrosting operating and from defrosting operating when the switching of warming operation Easily.

Further, when direct-acting electromagnetic valve is not provided with the situation of permanent magnet, the quantity of part is reduced, becomes simpler Single structure, also, permanent magnet is set in direct-acting electromagnetic valve and is formed as the situation of the electromagnetic valve of self maintenance, in refrigeration During operating (during defrosting operating) and during warming operation, the energization to solenoid can be stopped, being capable of save energy with this.

Problem than that described above, structure and action effect, can be able to clearly by embodiments below.

Description of the drawings

Fig. 1 is the overall structure figure of (during defrosting operating) when representing the cooling operation of heat pump type refrigerating heating system, the heat Pump type refrigeration and heating system assembles have and possess the first embodiment of the direct-acting electromagnetic valve of the present invention as guide valve Slidingtype four-way switching valve.

When Fig. 2 is the cooling operation of the four-way valve body for representing four-way switching valve shown in Fig. 1, (during defrosting operating) attaches The profile of partial plan layout.

Fig. 3 is overall structure figure when representing the warming operation of heat pump type refrigerating heating system, and the heat pump type refrigerating heats System assembles have the slidingtype four-way switching valve shown in Fig. 1.

Fig. 4 be represent four-way switching valve shown in Fig. 1 as guide valve, first embodiment direct-acting electromagnetic valve system The amplification profile of the subsidiary partial plan layout of (during defrosting operating) during blowdown firing.

Fig. 5 A are the amplification stereograms of the direct-acting electromagnetic valve internal structure for representing first embodiment.

Fig. 5 B are the profiles of the U-U lines along Fig. 4.

Fig. 5 C are the profiles of the V-V lines along Fig. 4.

Fig. 6 is to represent that the direct-acting electromagnetic valve of first embodiment switches midway and (applies from defrosting operating to warming operation The state of voltage V1) amplification profile.

Fig. 7 is to represent that the direct-acting electromagnetic valve of first embodiment switches midway and (applies from defrosting operating to warming operation The state of voltage V2) amplification profile.

The amplification of (state of applied voltage V3) when Fig. 8 is the direct-acting electromagnetic valve warming operation for representing first embodiment Profile.

Fig. 9 is to represent that the direct-acting electromagnetic valve of first embodiment switches midway and (applies from warming operation to defrosting operating The state of voltage V2) amplification profile.

Figure 10 is the action and position for representing the direct-acting electromagnetic valve each several part of first embodiment in each state Catalog.

Figure 11 is the action of the heat pump type refrigerating heating system each several part for representing first embodiment, position, status summary Sequential chart.

Figure 12 A are to represent the rotation for possessing the second embodiment of the direct-acting electromagnetic valve of the present invention as guide valve The one side figure of formula four-way switching valve.

Figure 12 B are to represent the rotation for possessing the second embodiment of the direct-acting electromagnetic valve of the present invention as guide valve Formula four-way switching valve, refrigeration position upper surface side configuration figure and the upper surface side configuration figure of position of heating.

Figure 13 is the overall structure figure of (during defrosting operating) when representing the cooling operation of heat pump type refrigerating heating system, the heat Pump type refrigeration and heating system assembles have rotary type four-way switching valve shown in Figure 12 A, Figure 12 B (expression be Figure 12 B refrigeration position The X-X sections put).

Figure 14 is overall structure figure when representing the warming operation of heat pump type refrigerating heating system, and the heat pump type refrigerating heats System assembles have rotary type four-way switching valve shown in Figure 12 A, Figure 12 B, and (expression is that the X-X of heating position of Figure 12 B is cutd open Face).

Figure 15 A are the enlarged fragmentary cross sections of the major part of the actuator shown in Figure 12 A.

Figure 15 B are the exploded perspective views of the major part of the motion changing mechanism shown in Figure 15 A.

Figure 16 be represent four-way switching valve shown in Figure 13 as guide valve, second embodiment direct-acting electromagnetic valve The amplification profile of the subsidiary partial plan layout of (during defrosting operating) during cooling operation.

Figure 17 is to represent that the direct-acting electromagnetic valve of second embodiment switches midway and (applies from defrosting operating to warming operation The state of voltage V1) amplification profile.

Figure 18 is to represent that the direct-acting electromagnetic valve of second embodiment switches midway and (applies from defrosting operating to warming operation The state of voltage V2) amplification profile.

The amplification of (without energization blocking) when Figure 19 is the direct-acting electromagnetic valve warming operation for representing second embodiment Profile.

Figure 20 is to represent that the direct-acting electromagnetic valve of second embodiment switches midway and (applies from warming operation to defrosting operating The state of voltage V2) amplification profile.

Figure 21 is the action and position for representing the direct-acting electromagnetic valve each several part of second embodiment in each state Catalog.

Figure 22 is the action of the heat pump type refrigerating heating system each several part for representing second embodiment, position, status summary Sequential chart.

Figure 23 A are (and during defrosting operating) systems when representing an example of heat pump type refrigerating heating system, cooling operation The schematic arrangement figure of cryogen flowing.

The simple knot of cold-producing medium flowing when Figure 23 B represent an example of heat pump type refrigerating heating system, warming operation Composition.

Label declaration

1：Four-way switching valve (first embodiment)；2：Four-way switching valve (second embodiment)；10：Four-way valve body； 11：Cylinder part；12：Main valve chamber；14：Main valve seat；15：Main valve plug；21：First piston；22：Second piston；31：First work Room；32：Second operating room；50：Direct-acting electromagnetic valve (first embodiment)；51：Solenoid；53：Permanent magnet；55：Attract Part；56：First spring；57：Second spring；60：Valve chamber；61：First plunger；62：Second plunger；64：Contact blocking member； 65：Limiting component；70：Valve seat；71：First valve element；72：Second valve element；75：First valve element keeper；76：Second valve element keeps Part；p1：First port；p2：Second port；p3：3rd port；p4：4th port；P10：High pressure imports port (master port)；# 1：First tubule；#2：Second tubule；#3：3rd tubule；#4：4th tubule；#10：High pressure tubule；80：Direct-acting electromagnetic valve (second embodiment)；105：Main valve；107：Actuator；110：Main valve case；110A：Upside valve seat；110B：Downside valve seat； 111：First operating room；112：Second operating room；113：Lower port；114：Upper port；115：Main valve chamber；120：Main valve Core；121：Ground floor part；122：Second layer part；123：Third layer part；124：4th layer of part；130A：Upper shaft Portion；130B：Downside shaft；131：First access；132：Second access；133：Third connecting road；134：4th connection Road；152：Lower surface occlusion component；153：Upper surface occlusion component；154：Keyway；155：Operating room；158：Motion transform machine Structure；160：Pressurized moving body；162：Sealing gasket；163：Work pin；165：Rotate driving body；172：Ball；175：Helicla flute； 176：Rotate and drive axle portion；177：Rotate and pass on mechanism；D：Exhaust end high pressure port；S：Suction side low-pressure port；C：Outside Turnover port；E：Indoor passes in and out port；200：Heat pump type refrigerating heating system；210：Compressor；220：Outdoor heat converter； 230：Indoor heat converter；260：Expansion valve.

Specific embodiment

Hereinafter, referring to the drawings the specific embodiment of the present invention is illustrated.

[first embodiment]

Fig. 1 is the overall structure figure of (during defrosting operating) when representing the cooling operation of heat pump type refrigerating heating system, the heat Pump type refrigeration and heating system assembles have and possess the first embodiment of the direct-acting electromagnetic valve of the present invention as guide valve Slidingtype four-way switching valve, (defrosting operating when Fig. 2 is the cooling operation of the four-way valve body for representing four-way switching valve shown in Fig. 1 When) subsidiary partial plan layout profile, Fig. 3 is overall structure when representing the warming operation of heat pump type refrigerating heating system Figure, the heat pump type refrigerating heating system are assembled with the slidingtype four-way switching valve shown in Fig. 1, and Fig. 4 is to represent that four-way is cut shown in Fig. 1 Change the subsidiary local as (during defrosting operating) during guide valve, first embodiment direct-acting electromagnetic valve cooling operation of valve The amplification profile of plane graph.

In addition, in this manual, the statement in the position such as top to bottom, left and right, front and rear and direction is become in order to avoid explanation Loaded down with trivial details facilitating with reference to the accompanying drawings and it is additional, be not intended to limit position and direction of the actual assembled in heat pump type refrigerating heating system.

In addition, in the various figures, for invention easy to understand, in addition to being easy to draw, have between being formed between part Spacing distance between gap and part etc., becomes situation that is big or diminishing and describe compared with the size of each component parts.

Heat pump type refrigerating heating system 200 shown in Fig. 1 possesses：Compressor 210；Outdoor heat converter 220；Indoor Thermal is handed over Parallel operation 230；Expansion valve 260；And the four-way switching valve 1 of the guide type of first embodiment of the invention.

The four-way switching valve 1 of this first embodiment is the switching valve of slidingtype, is substantially possessed：The cross valve of cylinder type Main body 10 and the single direct-acting electromagnetic valve 50 as guide valve.

[structure of four-way valve body 10]

Four-way valve body 10 has cylinder part 11, in the cylinder part 11, starts to be configured with the first work successively from left end side Room 31, first piston 21, main valve chamber 12, second piston 22 and the second operating room 32.It is to separate cylinder part 11 bubble-tight, Any one in above-mentioned first and second piston 21,22 is provided with the sealing gasket of subsidiary spring, the sealing gasket of the subsidiary spring Peripheral part be crimped on 11 inner peripheral surface of cylinder part.

Left end lid part 11A is fixed with hermetic in the left end of cylinder part 11, left end lid part 11A is as being The locating part of 21 left direction of first piston movement is prevented, and right-hand member lid part is hermetic fixed with the right-hand member of cylinder part 11 11B, right-hand member lid part 11B are as the locating part to prevent 22 right direction of second piston from moving.

On the top of above-mentioned main valve chamber 12, be provided with it is being connected with 210 exhaust end of compressor by conduit, be made up of pipe joint Exhaust end high pressure port D, also, upper surface is formed as the main valve seat 14 of valve seat by the modes such as soldering and 11 gas of cylinder part The engagement of close property ground is fixed.

In the valve seat of above-mentioned main valve seat 14, start to be sequentially provided with from left end side be connected with outdoor heat converter 220 and by The suction side connection of outside turnover port C and compressor 210 that pipe joint is constituted the suction side low pressure being made up of pipe joint The port S and indoor turnover port E for being connected with indoor heat converter 230 and being made up of pipe joint.

In addition, in the valve seat of main valve chamber 14, it is sliding freely the bowl-shape main valve plug 15 that stands upside down to being connected to section, the master Valve element 15 has run-track shaped annular sealing surface.

Above-mentioned main valve plug 15 is formed in the following manner：Can selectively in refrigeration position (right end position) and heating position Put (left position), the refrigeration position be as shown in Figure 1 and Figure 2, by outside turnover port C open and make suction side low pressure Port S passes in and out the position that port E is connected with indoor, and the heating position is as shown in Figure 3, beats indoor turnover port E Open and make suction side low-pressure port S that the position that port C is connected is passed in and out with outside.

In addition to main valve plug 15 is when mobile, the surface of any two (C and S, S and E) among port C, S, E, Now, main valve plug 15 is directed to the high-pressure refrigerant of main valve chamber 12 and presses down on and crimped with valve seat.

First piston 21 and second piston 22, by the main connector 25 of the rectangular plate-like of growing crosswise as shown in Fig. 2 plane graphs And integrally can be movably attached.The main opening 25a of round rectangle is formed with main connector 25, main valve plug 15 is from downside with cunning Dynamic mode freely is entrenched in main opening 25a, and main valve plug 15 is formed in the following manner：With the first and second pistons 21,22 Reciprocate and by above-mentioned main connector 25 main opening 25a part pressing movement, and refrigeration position (right end position) and Come and go between heating position (left position).

In addition, in main connector 25, in the left and right of above-mentioned main opening 25a, namely in main valve plug 15 in refrigeration position The position of the substantially surface of port C is passed in and out when (right end position) positioned at above-mentioned outside, circular open 25b is formed with, also, The position of the substantially surface of port E is passed in and out when main valve plug 15 is in heating position (left position) positioned at above-mentioned indoor, It is formed with circular open 25c.

[action of four-way valve body 10]

Hereinafter, the action to the four-way valve body 10 with said structure is illustrated.

When main valve plug 15 is in heating position (left position), by direct-acting electromagnetic valve described later 50, if making first Operating room 31 is connected with exhaust end high pressure port D, and the second operating room 32 is connected with suction side low-pressure port S, then high temperature is high The cold-producing medium of pressure is directed to the first operating room 31, and the cold-producing medium of High Temperature High Pressure is discharged from the second operating room 32, and first The pressure of operating room 31 is changed into higher than the pressure of the second operating room 32, as shown in figure 1, first, second piston 21,22 and main valve plug 15 right directions are moved, and second piston 22 abuts locking with right-hand member lid part 11B, and main valve plug 15 is in refrigeration position (right-hand member Position).

With this, among refrigeration and heating system 200, cooling operation (defrosting operating) is carried out (describe in detail below).

When main valve plug 15 is in refrigeration position (right end position) shown in Fig. 1, by direct-acting electromagnetic valve described later 50, If making the second operating room 32 connect with exhaust end high pressure port D, and the first operating room 31 is made to connect with suction side low-pressure port S, Then the cold-producing medium of High Temperature High Pressure is directed to the second operating room 32, and the cold-producing medium of High Temperature High Pressure is arranged from the first operating room 31 Go out, the pressure of the second operating room 32 is changed into higher than the pressure of the first operating room 31, first, second piston 21,22 and main valve plug 15 Left direction is moved, and first piston 21 abuts locking with left end lid part 11A, and main valve plug 15 is in heating position (left end position Put).

With this, among refrigeration and heating system 200, warming operation is carried out (describe in detail below).

[structure of direct-acting electromagnetic valve 50]

As the direct-acting electromagnetic valve 50 of guide valve, as shown in Fig. 4 (and Fig. 6 to Fig. 9) enlarged drawing, with left end side The outer valve casing 52 for being fixed with solenoid 51 and being made up of straight tube in periphery, starts to be sequentially connected in series from left end side in the valve casing 52 and matches somebody with somebody It is equipped with and attracts part 55, the first spring 56 for being made up of collapse coil spring, first plunger 61, is made up of collapse coil spring Second spring 57, and the second plunger 62.

The left part of valve casing 52 is sealably engaged on flange (the peripheral section mound for attracting part 55 by modes such as welding Portion), the attraction part 55 is tightened by bolt 59 and is fixed on overcoat 58 that cover solenoid 51, that section is groove shape One end side plate-like portion.

First plunger 61 and the second plunger 62 be substantially shaped as it is cylindric, respectively with the first valve element 71 and the second valve element 72 (aftermentioned) are so that axially (along the direction of 52 centrage L of valve casing) sliding freely configures in the valve casing 52.

Specifically, above-mentioned second plunger 62 has；The matrix part 62a of short cylindrical shape；It is fixed on a left side of matrix part 62a Side peripheral part it is upper and lower two it is local, by constituting with the rectangular flat shape part of above-mentioned matrix part 62a identical type materials Two extensions 62b, 62b.Extension 62b is embedded into by its right part and is formed in outside the left end side of above-mentioned matrix part 62a The upper and lower two local incised notch portion 62c in all portions, and engaged with incised notch portion 62c by modes such as welding, also, its left part By the outside of the first plunger 61 of oval column, simultaneously (axially) extends to 55 side of attraction part.In above-mentioned first plunger 61 Peripheral part (up and down two local), be formed with for by above-mentioned two extension 62b, 62b (to separate some gap 61s Mode) groove 61c, 61c for inserting.In addition, herein, matrix part 62a and extension 62b distinguish shape as different bodies Into but naturally it is also possible to that is, matrix part 62a and extension 62b, with matrix part 62a and will be prolonged as integrally being formed Second plunger 62 of extending portion 62b is made by being integrally formed.

The compression of first spring 56 installed in attracting between part 55 and the first plunger 61, by the first plunger 61 to suction unit 55 detached direction of part exerts a force, the compression of second spring 57 installed in the first plunger 61 and the second plunger 62 (matrix part 62a) it Between, by the second plunger 62 to direction force detached with the first plunger 61.

In the right side of the first plunger 61, it is to prevent the first plunger 61 and the second plunger 62 (matrix part 62a) in axle side In other words, be to be separated some gaps between the two directly contact on (namely moving direction), is configured with tabular Contact blocking member 64 (contact blocked state is with reference to Fig. 6), nonmagnetic substance of the contact blocking member 64 by synthetic resin etc. Constitute.The contact blocking member 64 is by being located at the annular step tread of 75 pars intermedia of the first valve element keeper (by left side halfbody 75A Large-diameter portion 75b and left end minor diameter part 75a formed cascaded surface) and plus hoop be fixed on 75 left end of the first valve element keeper (left side End minor diameter part 75a) the first plunger 61 right side, and be clamped in the way of clamping packing ring 63 in-between.In addition, making To contact blocking member 64, above structure is not limited solely to, it would however also be possible to employ install between having the face of contact probability The structure of cylindric thing etc..

In the inner circumferential of the valve casing 52, by soldering, welding, plus hoop etc. mode is embedded is fixed with limiting component 65, this is spacing Part 65 has the first locating part 66 for preventing the movement of 61 right direction of the first plunger and prevents 62 right direction of the second plunger from moving The second dynamic locating part 67.As shown in Figure 5A, the limiting component 65 has：Cylindric body part 65a；And from the cylindric body Two feet portions 65b, 65b that former and later two local (axially) of body portion 65a are extended, in cylindric body part 65a The part being embedded between the second plunger 62 of valve casing 52 and valve seat 70 (aftermentioned), and by the side such as (such as local at three) spot welding Formula and engaged fix.Along with Fig. 5 B, Fig. 5 C can be more clearly understood from such as in addition to Fig. 5 A, two feet portion 65b, 65b is being formed in first by being formed in the groove 62d of 62 peripheral part of the second plunger (former and later two place), its left part intercalation Former and later two local incised notch portion 61d of 61 right-hand member side peripheral part of plunger.With this, the left part of two feet portions 65b, 65b into It is that the incised notch portion 61d left sides of the first plunger 61 are abutted the first locating part 66 for engaging, the left part of cylindric body part 65a Become the second locating part 67 that 62 right side peripheral part of the second plunger is abutted locking.

In addition, by two feet portion 65b, 65b intercalations in the incised notch portion of the groove 62d and the first plunger 61 of the second plunger 62 The turned position around centrage L of 61d, the first plunger 61 and the second plunger 62 is prescribed, also, the first plunger 61 and second The rotation around centrage L of plunger 62 is also blocked from.It is, two feet portions 65b, 65b are also doubled as to limit the first post The first rotary spacing part rotated around centrage L and the function of the second rotary spacing part of plug 61 and the second plunger 62.

In addition, in the right-hand member side lower part of cylindric body part 65a, being formed with for loading cutting for 70 left end side lower part of valve seat Scarce portion 65c.

In addition, as the structure of locating part, except there are the first and second locating parts and structure is distinguished with valve casing 52 by above-mentioned Into limiting component 65 it is embedded be fixed on the structure of valve casing 52 outside, for example can also be as the second locating part 67 in valve casing 52 Stepped portion is formed, and the limiting component being made up of straight tube etc. is interior so that its right-hand member is connected to the state of above-mentioned stepped portion Build-in is scheduled on the large diameter portion of valve casing 52, and the left part of the limiting component is constituted as the first locating part 66, or, for example Two places that can also be as the first and second locating parts 66,67 in valve casing 52 form stepped portion.

Here, area (two extensions of close 55 side of attraction part of two extensions 62b, 62b of the second plunger 62 The total area of portion 62b, 62b) it is set as that the area of close 55 side of attraction part than the first plunger 61 is little.In addition, the first bullet The force (assumed load) of spring 56 is set as bigger than the force (assumed load) of second spring 57.In addition, being formed in the second plunger The left side of 62 matrix part 62a (is located at the contact blocking portion of the right side of the first plunger 61 with the right side of the first plunger 61 The right side of part 64) between interval G1 and be formed in the second plunger 62 extension 62b left side and attract part 55 Right side between interval G2 be set at essentially it is identical.

On the other hand, the right-end openings portion of valve casing 52 by welding, soldering, plus hoop etc. mode be hermetic equipped with lid Shape part 66A, lid part 66A have the tubule insert port (high pressure imports port p10) for being used to import high-pressure refrigerant, by The region that lid part 66A, the second plunger 62 and valve casing 52 are impaled becomes valve chamber 60.In valve chamber 60, by being hermetic inserted in The tubule insert port (high pressure imports port p10) of lid part 66A, the high pressure tubule #10 with flexibility, the system of High Temperature High Pressure Cryogen is imported into from above-mentioned exhaust end high pressure port D.

In addition, between second plunger 62 and lid part 66A of valve casing 52, hermetic being engaged by modes such as solderings There is valve seat 70, the upper surface of the valve seat 70 is formed as flat valve seat.In the valve seat (upper surface) of the valve seat 70, from left end Side starts, and first port p1, second port p2 and the 3rd port p3 are pre- to separate along the length direction (left and right directions) of valve casing 52 The mode at fixed interval horizontally set successively, also, the 4th port p4 is provided with the left side of valve seat 70, first port p1 passes through First tubule #1 is connected with the first operating room 31 of above-mentioned four-way valve body 10, and second port p2 is by the second tubule #2 and suction Enter side low-pressure port S connections, the 3rd port p3 is connected with the second operating room 32 by the 3rd tubule #3, and the 4th port p4 leads to Cross the 4th tubule #4 to be connected with suction side low-pressure port S.The opening surface of the 4th port p4 is formed as taper seat.

And, in the valve seat of valve seat 70, it is by the connection between first port p1, second port p2 and the 3rd port p3 State is switched over and to being connected to by the first valve element 71 of the slidingtype of 61 push-and-pull of the first plunger in the way of sliding freely, and And, in the left side of valve seat 70, it is to be switched and the 4th port p4 by can be away from being configured with by the second post in the way of close Fill in the second valve element 72 of the hoisting type of 62 push-and-pulls.

During vertical view, the first valve element 71 is provided with recess 71a in first valve element 71 in big oval, and recess 71a has will Among 3 port p1 to p3 of the valve seat for being located at valve seat 70 between adjacent port p1-p2, the size that can connect between p2-p3.Should First valve element 71 is connected with the first plunger 61 by the first valve element keeper 75, and the first valve element keeper 75 is by subsidiary ladder Left side halfbody 75A is constituted with the right side halfbody 75B for being formed with opening 77.

Specifically, the first plunger 61 by plus hoop etc. mode be fixedly connected with the first valve element keeper 75 left end it is little The large-diameter portion 75b of footpath portion 75a, the left side halfbody 75A of the first valve element keeper 75 in the way of sliding freely intercalation second Plunger 62, right-hand member plate-like portion 75c of halfbody 75A on the left of this, the base end part of the right side halfbody 75B of the first valve element keeper 75 and The base end part of plate-shaped springs 68 is connected by modes such as rivetings together and is fixed, and the plate-shaped springs 68 are by the first valve element 71 to thickness Direction (above-below direction) exerts a force.Near the right-hand member of the right side halfbody 75B of the first valve element keeper 75, round rectangle is formed with Opening 77, in the opening 77, can be fitted together in the way of sliding by through-thickness has the first valve element 71.In addition, here, opening 77 The length on width and left and right directions, be formed as the length on width and left and right directions with the first valve element 71 Degree is roughly the same.

Second valve element 72 is formed as needle valve, and the needle valve has：Possess with the 4th port p4 away from close circle The valve element portion 72a of the conical surface；And columned base end part 72b.Second valve element 72 by above-mentioned base end part 72b to be pressed into, plus The modes such as hoop are embedded to be fixed on installing hole and is connected with the second plunger 62, and the installing hole is formed in the base end part of the second plunger 62 The right side of 62a.

In addition, above-mentioned direct-acting electromagnetic valve 50 is arranged on dorsal part of four-way valve body 10 etc. by installed part 69.

Hereinafter, with reference to Figure 10, to the voltage (be powered/stop and be powered) that applies to solenoid 51 and the first plunger 61 and the Relation between the action of two plungers 62, position, and, and the first plunger 61 and the linkage of the second plunger 62 the first valve element 71 and Relation between the action of the second valve element 72, position is illustrated.Figure 10 is to represent 50 each several part of direct-acting electromagnetic valve at each The catalog of action and position during operating state (A, B, C, C1).

In the initial setting state of stopping that being powered to solenoid 51, as shown in figure 4, passing through the first spring 56 and the second bullet The force of spring 57, non-attraction position [X2] of first plunger 61 in locking is abutted with the first locating part 66, also, the second plunger The 62 non-attraction positions [X4] in locking is abutted with the second locating part 67.With as it does so, the first valve element 71 and the first plunger 61 It is dynamic and being in makes second port p2 and the 3rd port p3 connections and the right end position of opening first port p1 is (sometimes referred to as Progressive position) [Y2], also, the second valve element 72 linked with the second plunger 62 and is in and be pressed against the circular cone of the 4th port p4 and open Mouthful face and closed position (sometimes referred to as progressive position) [the Y4] (state classification that is turned off：A).

In this condition, if to 51 applied voltage V1 of solenoid, as shown in fig. 6, the first plunger 61 is still in One locating part 66 abuts the non-attraction position [X2] of locking, and the second plunger 62 is resisted the force of second spring 57 and is in first The near attraction position [X3] of 61 layback of plunger.Here, although two extension 62b, 62b (left part) of the second plunger 62 with Attract part 55 to abut, but the second plunger 62 is touched blocking member 64 with the directly contact of the first plunger 61 to be prevented.It is adjoint This, the first valve element 71 is linked and is in from the 4th end still in above-mentioned right end position [Y2], the second valve element 72 and the second plunger 62 Open position (sometimes referred to as going-back position) [the Y3] (state classification that the conical aperture face of mouth p4 is left and opened it： B)。

In this condition, if applying the voltage V2 higher than voltage V1 to solenoid 51, as shown in fig. 7, the first plunger 61 resistance the first springs 56 forces and be in attraction (sorption) position [X1] for being attracted part 55 and furthering, but, the second post Fill in 62 due to locking being abutted with part 55 is attracted, so still in attraction position [X3] as shown in Figure 6.With as it does so, the One valve element 71 and the first plunger 61 link and being in connects first port p1 and second port p2 and open the 3rd port p3 Left position (sometimes referred to as going-back position) [Y1], also, the second valve element 72 is still in above-mentioned open position [Y3] (shape State is classified：C).

In this condition, if applying the voltage V3 lower than voltage V1 and voltage V2 (namely V3 ＜ V1 to solenoid 51 ＜ V2), as the area of close 55 side of attraction part of two extensions 62b, 62b of the second plunger 62 is set as than the first post The area of close 55 side of attraction part of plug 61 is little, then as shown in figure 8, the first plunger 61 passes through the captivation of attraction part 55 still Attraction (sorption) position [X1] is maintained at, the second plunger 62 is returned to non-attraction position by the force of second spring 57 [X4].With as it does so, the first valve element 71 is still in above-mentioned left position [Y1], the second valve element 72 is returned to above-mentioned closed position [Y4] (state classification：C1).

On the other hand, in this condition, if applying the voltage V2 higher than voltage V1 to solenoid 51, as shown in figure 9, First plunger 61 is still maintained at attraction (sorption) position [X1], the second plunger 62 resist the force of second spring 57 and be in The attraction position [X3] that first plunger, 61 layback is near and two extension 62b, 62b (left part) are abutted with attraction part 55. Companion is as it does so, the first valve element 71 is still in above-mentioned left position [Y1], also, the second valve element 72 is again at above-mentioned open position [Y3] (state classification：C).

Afterwards, if stopping being powered to solenoid 51, the first plunger 61 is returned to by the force of the first spring 56 Non- attraction position [X2], also, the second plunger 62 is returned to non-attraction position [X4] by the force of second spring 57.Companion As it does so, the first valve element 71 is returned to above-mentioned right end position [Y2], also, the second valve element 72 is returned to above-mentioned closed position [Y4] (state classification：A).

It is among the direct-acting electromagnetic valve 50 of present embodiment, formed as described above to be：According to applying to solenoid 51 Plus voltage, the first plunger 61 in abut with the first locating part 66 locking non-attraction position [X2], and to attract part 55 laybacks near attraction (sorption) position [X1], non-attraction position of second plunger 62 in locking is abutted with the second locating part 67 [X4], and to the suction that 61 layback of the first plunger is near and two extension 62b, 62b (left part) are abutted with attraction part 55 Draw position [X3], with as it does so, the first valve element 71 and the first plunger 61 link and being in makes second port p2 and the 3rd port p3 companies Logical right end position (progressive position) [Y2], and the left position that first port p1 is connected with second port p2 is made (to give up the throne afterwards Put) [Y1], also, the second valve element 72 and the second plunger 62 link and be in the conical aperture face that is pressed against the 4th port p4 and The closed position (progressive position) [Y4] that is turned off, and leave from the conical aperture face of the 4th port p4 and open it Open position (going-back position) [Y3].

In addition, when in above-mentioned closed position, the second valve element 72 is pressed against the by the force of second spring 57 The conical aperture face of four port p4, so, the valve seat 70 (left part) for being formed with the 4th port p4 also becomes the second post of prevention Fill in the second locating part 67A of 62 right directions movement.

[four-way switching valve 1 comprising direct-acting electromagnetic valve 50 is monolithically fabricated and action]

Hereinafter, to comprising direct-acting electromagnetic valve 50 1 entirety of four-way switching valve and refrigeration and heating system 200 composition and Action is illustrated.

Among the four-way switching valve 1 of present embodiment, using the description below as feature：From defrosting operating (cooling operation) When switching when switching to warming operation and from warming operation to defrosting operating (cooling operation), direct-acting electromagnetic valve 50 is made Second valve element 72 is in above-mentioned open position (going-back position), is gradually lowered to the pressure of the main valve chamber 12 of four-way valve body 10 Predetermined pressure P1.

So, as shown in figure 1, the voltage applied to the solenoid 51 of direct-acting electromagnetic valve 50 for control, and in possessing Be provided with control unit 40 and operation dish (remote control) 42 of microcomputer etc., also, (such as in exhaust end high pressure port D side) possess for The pressure transducer 45 of detection 12 pressure of main valve chamber, control unit 40 is according to the signal obtained from above-mentioned pressure transducer 45, and examines The reduced pressure of main valve chamber 12 is surveyed to above-mentioned predetermined pressure P1.Though in addition, do not illustrate, except from aforesaid operations disk 42 or pressure The signal of force transducer 45, represents that the signal of the states and action situation etc. such as each several part temperature is also fed with control unit 40, should Control unit 40 carried out according to these signals the control of direct-acting electromagnetic valve 50 (applied voltage), the control of compressor 210 (revolution), It is attached to control of pressure fan of outdoor heat converter 220 and indoor heat converter 230 etc..

Hereinafter, with reference to Figure 11 sequential chart successively to defrosting operating (cooling operation), from defrosting operating to warming operation Switching, warming operation, illustrate from warming operation to the switching of defrosting operating.In addition, in the sequential chart of Figure 11, to avoid Accompanying drawing and explanation it is loaded down with trivial details, expression be each several part for the mechanical action of the change of applied voltage do not delay in the case of.

In addition, as described above, in defrosting operating, cold-producing medium to flow with identical cycle during cooling operation, each portion Point action, position, state etc. be formed as identical with during cooling operation.In addition, because cutting from cooling operation to warming operation Change frequency and the switching frequency from warming operation to cooling operation is extremely low, illustrate with defrosting operating as representative below.

[defrosting (refrigeration) operating]

When operating is defrosted (freeze), stop the energization to solenoid 51.With this, as shown in Figure 1, Figure 2, Figure 4 shows, By the first spring 56 and the force of second spring 57, non-attraction of first plunger 61 in locking is abutted with the first locating part 66 Position, also, non-attraction position of second plunger 62 in locking is abutted with the second locating part 67, with as it does so, the first valve element 71 In make second port p2 and the 3rd port p3 connection right end position, also, the second valve element 72 in by the 4th port p4 close The closed position closed.

If the first valve element 71 is in the closed position in right end position, the second valve element 72, the height of 210 exhaust end of compressor The cold-producing medium of warm high pressure imports port p10 → valve chamber 60 → the first by exhaust end high pressure port D → high pressure tubule #10 → high pressure Port p1 → the first tubule #1 and be directed to the first operating room 31, also, the high-pressure refrigerant of the second operating room 32 is by the Recess 71a → second port p2 → the second tubule the #2 of three tubule #3 → the, three port p3 → the first valve element 71 and be discharged to suction Enter side low-pressure port S, 15 right direction of main valve plug is moved and is in refrigeration position (right end position).

With this, the cold-producing medium from the High Temperature High Pressure of compressor 210 passes through exhaust end high pressure port D → 12 → room of main valve chamber Outside turnover port C and be directed to outdoor heat converter 220, there heat release and condense.Thus, it is attached to outdoor heat exchange The frost of device 220 is melted and removes.Condensed high-pressure refrigerant, is directed to expansion valve 260 and reduces pressure, the low pressure after decompression Cold-producing medium is directed to indoor heat converter 230, there carries out heat exchange with room air and evaporates, from indoor heat exchange The cold-producing medium of the low-temp low-pressure of device 230 passed in and out inside port E → main valve plug 15 by indoor → and suction side low-pressure port S returned Return to the suction side of compressor 210.

[from defrosting operating to the switching of warming operation]

In the switching from defrosting operating to warming operation, to 51 applied voltage V1 of solenoid (time point t1).With this, As shown in fig. 6, the first plunger 61 is still in the non-attraction position that locking is abutted with the first locating part 66, the second plunger 62 resists the The force of two springs 57 and be in that near to 61 layback of the first plunger and extension 62b, 62b (left part) are supported with attraction part 55 The attraction position for connecing, with as it does so, the first valve element 71 is still in above-mentioned right end position, 72 left direction of the second valve element is moved and is in Above-mentioned open position, the 4th port p4 are opened.

If the first valve element 71 is in an open position still in right end position, the second valve element 72, the first plunger 61, the first valve Position when core 71 and main valve plug 15 still maintain defrosting (refrigeration) to operate, the high-pressure refrigerant for importing to valve chamber 60 pass through the 4th end Mouth p4 → the 4th tubule #4, is discharged to suction side low-pressure port S, and the pressure of main valve chamber 12 is gradually lowered.

Then, if the reduced pressure of main valve chamber 12 is to predetermined pressure P1, control unit 40 is according to from pressure transducer 42 Signal detected (time point t2), the voltage applied to solenoid 51 is brought up to into the V2 (time point higher than V1 from V1 t2).With this, as shown in fig. 7, the second plunger 62 is still in above-mentioned attraction position, the second valve element 72 still in above-mentioned open position, First plunger 61 in being attracted attraction (sorption) position that part 55 furthers, with as it does so, the movement of 71 left direction of the first valve element, Left position in making first port p1 connect with second port p2.

If the second valve element 72 is in left position still in open position, the first valve element 71,210 exhaust end of compressor The cold-producing medium of High Temperature High Pressure imports port p10 → valve chamber 60 → the by exhaust end high pressure port D → high pressure tubule #10 → high pressure Three port p3 → the 3rd tubule #3 and be directed to the second operating room 32, also, the high-pressure refrigerant of the first operating room 31 passes through Recess 71a → second port p2 → the second tubule the #2 of the first tubule #1 → first port p1 → the first valve element 71 and be discharged to Suction side low-pressure port S, 15 left direction of main valve body are moved and are in heating position (left position).

In this case, just, to after 51 applied voltage V2 of solenoid, the pressure of main valve chamber 12 is from predetermined pressure P1 urgency It is acute to decline, also, during to 51 applied voltage V2 of solenoid, due to the second plunger 62 still in above-mentioned attraction position, the Two valve elements 72 still in above-mentioned open position, so the pressure of main valve chamber 12 further continuous decrease.

Then, if from the time point t2 of applied voltage V2 through the scheduled time, control unit 40 will be applied to solenoid 51 Plus voltage be reduced to V3 (time point t3) lower than it from V2.With this, as shown in figure 8, the first plunger 61 is by attracting part 55 captivation and still keep above-mentioned attraction (sorption) position, the first valve element 71 is still in making first port p1 and second port p2 The left position of connection, main valve plug 15 is still in heating position (left position), the second applying by second spring 57 of plunger 62 Power and be returned to non-attraction position, with as it does so, due to the second valve element 72 be returned to by the 4th port p4 close close stance Put, so, the pressure of main valve chamber 12 is no longer further reduced, when beginning to ramp up common warming operation from time point t3 Pressure.

With this, the switching from defrosting operating to warming operation is completed.In addition, needing Chang Shixiang electromagnetism in the warming operation 51 applied voltage V3 of coil.

[warming operation]

In warming operation, as shown in figure 3, the cold-producing medium from the High Temperature High Pressure of compressor 210 passes through exhaust end high pressure Port D → 12 → indoor of main valve chamber passes in and out port E and is directed to indoor heat converter 230, there enters with room air Row heat exchange (heating) and condense, become the two phase refrigerant of high pressure and be directed to expansion valve 260.High-pressure refrigerant is swollen by this Swollen valve 260 reduces pressure, and the low pressure refrigerant after decompression is directed to outdoor heat converter 220, there carries out heat with outdoor air Exchange and evaporate, the cold-producing medium from the low-temp low-pressure of outdoor heat converter 220 passes in and out port C → main valve plug 15 by outside Interior → suction side low-pressure port S and be returned to the suction side of compressor 210.

[from warming operation to the switching of defrosting operating]

On the other hand, in the switching from warming operation to defrosting operating, to 51 applied voltage V2 (time point of solenoid t4).With this, as shown in figure 9, the first plunger 61 is still in attraction (sorption) position, the second plunger 62 resists second spring 57 Force and be in the attraction potential that 61 layback of the first plunger is near and extension 62b, 62b (left part) are abutted with attraction part 55 Put, with as it does so, the first valve element 71 is still in above-mentioned left position, 72 left direction of the second valve element is moved and is in above-mentioned open position Put, the 4th port p4 is opened.

If the first valve element 71 is in an open position still in left position, the second valve element 72, the first plunger 61, the first valve Core 71 and main valve plug 15 still maintain position during warming operation, import to the high-pressure refrigerant of valve chamber 60 by the 4th port p4 → 4th tubule #4 and be discharged to suction side low-pressure port S, the pressure of main valve chamber 12 is gradually lowered.

Then, if the reduced pressure of main valve chamber 12 is to predetermined pressure P1, control unit 40 is according to from pressure transducer 42 Signal detected (time point t5), stop to solenoid 51 being powered.With this, by the first spring 56 and second spring 57 Force, the first plunger 61 is returned to the non-attraction position that locking is abutted with the first locating part 66, also, 62 quilt of the second plunger Return to the non-attraction position that locking is abutted with the second locating part 67, with as it does so, the first valve element 71 in make second port p2 and The right end position of the 3rd port p3 connections, also, the second valve element 72 is returned to the closed position for closing the 4th port p4.

In this case, after just stopping to solenoid 51 being powered, the pressure of main valve chamber 12 from predetermined pressure P1 drastically Decline, but, the pressure of main valve chamber 12 is no longer further reduced, and begins to ramp up common defrosting (system from time point t5 It is cold) operating when pressure.

With this, complete the switching from warming operation to defrosting operating, become as shown in Figure 1, Figure 2, Figure 4 shows without be powered Defrosting (refrigeration) operating.

[effect of the direct-acting electromagnetic valve 50 and four-way switching valve 1 of first embodiment]

As from the description above it should be understood that the direct-acting electromagnetic valve 50 of present embodiment is had as guide valve Standby four-way switching valve is constituted in the following manner：When switching from defrosting operating to warming operation and from warming operation to removing During frost operating switching, make the second valve element 72 of direct-acting electromagnetic valve 50 in an open position, the pressure of main valve chamber 12 is gradually dropped It is low to predetermined pressure, so, from warming operation to defrosting operating and when switching from defrosting operating to warming operation, it is not necessary to too The big frequency for reducing compressor 210, it becomes possible to reduce the pressure differential of high-pressure side and low-pressure side, make an uproar therefore, it is possible to be effectively reduced Sound, and the time that the pressure of cold-producing medium can be shortened to return to required high pressure and needed, with as it does so, can shorten from heating fortune Time till going to into the time required for defrosting operating and warm air from indoor heat converter 230 out.

Like this, among the heat pump type refrigerating heating system 200 of present embodiment, noise can be reduced fast Carried out from warming operation fastly to defrosting operating and from defrosting operating to the switching of warming operation, added, it is not necessary to direct acting Electromagnetic valve beyond formula electromagnetic valve 50, so based on fairly simple structure, it becomes possible to carry out cooling operation, warming operation and remove Frost operating, therefore, it is possible to reduce setup cost and component costs.

In addition, among the direct-acting electromagnetic valve 50 of present embodiment, being provided with a part for 62 peripheral part of the second plunger By the outside of the first plunger 61 and to the extension 62b for attracting 55 side of part (left end side) to extend, the second plunger 62 and attract The distance between part 55 becomes near, can produce captivation with few magnetomotive force, so magnetic effect is uprised, with this, carry out From warming operation to defrosting operating and from defrosting operating when the switching of warming operation, the switching action of direct-acting electromagnetic valve 50 is made Become easy.

In addition, among the direct-acting electromagnetic valve 50 of present embodiment, when making the second valve element 72 in an open position, Extension 62b, 62b (left part) of two plungers 62 is abutted with part 55 is attracted, and second plunger 62 is supported with part 55 is attracted Locking is connect, so, carrying out from warming operation to defrosting operating and from defrosting operating, when the switching of warming operation, to make straight The switching action of type solenoid valve 50 is stabilized.

Further, among the direct-acting electromagnetic valve 50 of present embodiment, use as the second valve element 72 with can The valve element of the hoisting type of the 4th port p4 is configured in away from close mode, required for can be switched the 4th port p4 The amount of movement (lift) of the second valve element 72 diminishes, thus it is possible to realize the miniaturization of the direct-acting electromagnetic valve 50, also, with it is rear The direct-acting electromagnetic valve 80 of the second embodiment stated (as the second valve element 72, and is docked at using the mode for sliding freely 80) direct-acting electromagnetic valve of the valve element of the slidingtype of the 4th port p4 is compared, and having can be by 72 smoothly mobile effect of the second valve element Really.In addition, direct-acting electromagnetic valve 80 (arranging the direct-acting electromagnetic valve 80 of the permanent magnet 53) phase with second embodiment described later Than, it is also possible to obtain following a variety of effects：The quantity of part can be reduced；When the reasons such as power failure voltage is cut off, energy The position of the first plunger 61 (the first valve element 71 being connected with the first plunger 61) is easily mastered enough；Consideration is no longer needed to use permanent magnetism Magnetism balanced design of interval voltage of necessary first plunger 61 etc. during body 53.

[second embodiment]

Figure 12 A are to represent the rotation for possessing the second embodiment of the direct-acting electromagnetic valve of the present invention as guide valve The one side figure of formula four-way switching valve, Figure 12 B are represented the second embodiment of the direct-acting electromagnetic valve of the present invention as leading Rotary type four-way switching valve, refrigeration position the upper surface side configuration figure possessed to valve and the upper surface side of position of heating are matched somebody with somebody Put figure.Figure 13 is the overall structure figure of (during defrosting operating) when representing the cooling operation of heat pump type refrigerating heating system, the heat pump Formula refrigeration and heating system assembles have rotary type four-way switching valve shown in Figure 12 A, Figure 12 B (expression be Figure 12 B refrigeration position X-X sections).Figure 14 is overall structure figure when representing the warming operation of heat pump type refrigerating heating system, the heat pump type refrigerating Heating system be assembled with the rotary type four-way switching valve shown in Figure 12 A, Figure 12 B (expression be Figure 12 B heating position X-X Section).In addition, Figure 16 be represent four-way switching valve shown in Figure 13 as guide valve, second embodiment direct drive type electro The amplification profile of the subsidiary partial plan layout of (during defrosting operating) during magnet valve cooling operation.

The four-way switching valve 2 of this second embodiment is revolving four-way switching valve, substantially possesses main valve 105 and makees For the single direct-acting electromagnetic valve 80 of guide valve.

[structure of main valve 105]

Main valve 105 has：The main valve case 110 of the tubular of graduation main valve chamber 115；Main valve is configured in rotatably The main valve plug 120 of room 115；And for it is making that main valve plug 120 rotates, with high-pressure refrigerant selectively being imported or is discharged , the actuator 107 of the first operating room 111 that volume can change and the second operating room 112.

Main valve case 110 has：Cylindric body part 110C；With by the upper surface open of body part 110C hermetic The mode of closing and the upside valve seat 110A by fixed relatively thick round plate shape；And with will be the lower surface opening of body part 110C airtight Property ground closing mode and the downside valve seat 110B by fixed relatively thick round plate shape, in upside, valve seat 110A or so is sagging is provided with Exhaust end high pressure port D being made up of pipe joint and indoor turnover port E, in downside valve seat 110B or so it is sagging be provided with by The outside turnover port C and suction side low-pressure port S that pipe joint is constituted.Each port is located on same circumference, during vertical view, is told Go out side high pressure port D and outside turnover port C and indoor turnover port E and suction side low-pressure port S be configured in it is same Position.The upside lower surface of valve seat 110A and the upper surface of downside valve seat 110B become flat and smooth valve seat 117,117.

In addition, before and after the valve seat 110B lower face sides of downside, being provided with the main part 150 of actuator 107.

The segmenting structure of the first half and lower half of the main valve plug 120 for short cylindrical shape.Specifically, the first half is by thicker Ground floor part 121 and the second layer part integrally engaged with 121 lower face side of ground floor part by modes such as welding 122 are constituted, and lower half is by the third layer part 123 compared with thick round plate shape and by under the modes such as welding and the third layer part 123 Thicker the 4th layer part 124 of face side one engagement is constituted.

130 points of the shaft of main valve plug 120 is：With can be with the main part (first half, lower half) of main valve plug 120 The upper shaft portion 130A in the angle rod portion of one action；Downside shaft 130B；And connection upper shaft portion 130A and downside Pole 130C, 130C of shaft 130B.Upper shaft portion 130A is arranged on the dead eye in upside valve seat 110A lower surfaces central authorities 116A rotationally supports that downside shaft 130B is arranged on the dead eye 116B in the bottom surface central authorities of shrinkage pool and rotationally supports that this is recessed Hole is located at downside valve seat 110B lower surfaces central authorities.

When stream switching is carried out, main valve plug 120 is by actuator described later 107 and by shaft 130 positive and negative Two directions rotate, and are formed as selectively being located at：Refrigeration position as shown in Figure 12 B and Figure 13；And from the refrigeration position Put rotate clockwise 60 degree, heating position as shown in Figure 12 B and Figure 14.

In main valve plug 120, in refrigeration position when, be provided with and exhaust end high pressure port D and outside turnover port C connected The first linear access 131, and will indoor turnover port E it is linear with what suction side low-pressure port S was connected Second access 132, also, when being in heating position, be provided with and exhaust end high pressure port D and indoor turnover port E are connected U-shaped third connecting road 133, and outside is passed in and out the of the U-shaped that connects with suction side low-pressure port S of port C Four access 134.

As described above, among the four-way switching valve 2 of present embodiment, by making main valve plug 120 from refrigeration position to suitable Clockwise rotates 60 degree, and between the port D-C connected by the first access 131 and by the second access Between the 132 port E-S for being connected, between the port D-E connected by third connecting road 133 and by the 4th connection Stream switching is carried out between the port C-S connected by road 134, is turned from heating position counterclockwise by making main valve plug 120 Move 60 degree and carry out stream switching contrary to the above.

Among the four-way switching valve 2 of such present embodiment for constituting, the first access 131 and the second access 132 The thickness (passage diameters) be formed as from top to terminal is big with the bore of exhaust end high pressure port D and indoor turnover port E The path for causing identical linear, cold-producing medium directly flow from exhaust end high pressure port D, indoor turnover port E to underface, So the pressure loss in main valve 105 (main valve plug 120) hardly occurs.In addition, the third connecting road 133 of U-shaped and The volume of four access 134 is formed as larger, so the pressure loss is reduced, stack up can considerably reduce pressure damage Lose.

[structure of actuator 107]

Hereinafter, reference picture 15A, Figure 15 B, for the actuator 107 for rotating main valve plug 120 is illustrated.

Actuator 107 is using pressure between the high-pressure refrigerant and low pressure refrigerant circulated in inside above-mentioned main valve 105 The actuator of poor fluid pressure type, the side (rear end side) with the downside valve seat 110B for being located at above-mentioned main valve case 110 Main part 150.Main part 150 possesses：Cylindric body part 151；Lower surface occlusion component of the central authorities with convex portion 152a 152；It is thicker discoideus and as the upper surface occlusion component 153 for seal member and locating part, the body part 151 from Downside valve seat 110B extends downwards, and the lower surface occlusion component 152 is with will be the lower surface opening of the body part 151 hermetic closed Mode and fixed and by plus hoop, the upper surface occlusion component 153 with by body part 151 upper surface open closing in the form of And by airtight fixation, the pressurized moving body 160 and short cylindrical shape that thicker bottomed cylindrical is contained in its operating chamber 155 turns Dynamic driving body 165, the pressurized moving body 160 constitute motion changing mechanism 158, and the rotation driving body 165 is with the pressurized movement Moving up and down for body 160 and in the way of it can relatively rotate in be inserted in the pressurized moving body 160.With on pressurized moving body 160 Lower movement, rotates driving body 165 and turns opposite to inside the pressurized moving body 160.

Sealing gasket 162 is installed in the periphery lower end of above-mentioned pressurized moving body 160, the sealing gasket 162 will be with action It is hermetic closed and the operating chamber 155 is hermetic separated into into the first work that volume can change between the inner peripheral surface of room 155 Room 111 and the second operating room 112.In addition, action pin 163 is fixed on the periphery of pressurized moving body 160 by modes such as press-ins Portion, the action pin 163 are respectively embedded in two places of inner circumferential first half located at body part 151 or so and extend in short transverse Keyway 154.

By the action pin 163 and keyway 154, pressurized moving body 160 linearly can be moved up and down but its rotation is hindered Only.

In addition, being provided with for importing to the second operating room 112 or discharging high-pressure refrigerant on the top of main part 150 Portion port 114, also, be provided with for importing to the first operating room 111 or discharging height at its bottom (lower surface occlusion component 152) The lower port 113 of compression refrigerant.

Between the pressurized moving body 160 and rotation driving body 165 for constituting above-mentioned motion changing mechanism 158, being will be pressurized The moving up and down of moving body 160 (linear reciprocating motion) is transformed into the rotational motion of the forward and reverse direction for rotating driving body 165, if There are ball 172, the resettlement section 174 of the ball 172 and helicla flute 175.

Specifically, multiple (being 2 in present embodiment) balls 172 and its resettlement section are provided with pressurized moving body 160 174, rotate driving body 165, its periphery be provided with the circumferential direction bending one side extend in the vertical direction it is multiple (being 2 in present embodiment) helicla flute 175.Above-mentioned resettlement section 174 a, so that part for the ball 172 is into radial direction State that side projects and mobile state is prevented to house ball 172 in a rotatable manner and with essence, it is above-mentioned Shallow slot of the helicla flute 175 by section for arc-shaped is constituted, and the shallow slot is embedded with prominent on the inside of from the resettlement section 174 to radial direction Ball 172 a part and be in close contact with which in a rotatable manner.

Add hoop to be fixed with rotation in the central authorities of above-mentioned rotation driving body 165 and drive axle portion 176, the rotation drives axle portion 176 With 165 unitary rotation of rotation driving body.The rotation drives axle portion 176 to possess：Bottom is fixed on the bias for rotating driving body 165 Portion 176a；The big footpath pars intermedia 176b of the subsidiary ladder in upper surface occlusion component 153 is supported in a rotatable manner；To turn Dynamic mode freely is supported in dead eye 119, the hinge portion 176c that diameter is little located at downside valve seat 110B lower face sides.Separately Outward, O-ring 159 is equiped between the big footpath pars intermedia 176b of the medium pore and subsidiary ladder of upper surface occlusion component 153.

Here, rotating the pivot center Q, the pivot center O with main valve plug 120 of driving body 165 (rotate and drive axle portion 176) It is arranged in parallel, drives between axle portion 176 and the downside shaft 130B of main valve plug 120 rotating, is provided with and will rotate driving body 165 The rotation of (rotate and drive axle portion 176) is communicated to main valve plug 120, rocker-arm rotation and passes on mechanism 177.

Under such composition, if importing high-pressure refrigerant to the first operating room 111 by lower port 113, and pass through Upper port 114 discharges high-pressure refrigerant from the second operating room 112, due to first operating room 111 compared with the second operating room 112 For high pressure, so pressurized moving body 160 is pushed upwardly, the action pin 163 of pressurized moving body 160 is induced by keyway 154, is received Pressure moving body 160 is moved up on one side as the crow flies, with as it does so, the ball 172 of motion changing mechanism 158 also rotates pen Directly move up.Now, helicla flute 175 is embedded in the part of the ball 172 in helicla flute 175 to circumferential direction pressing, turns (herein for clockwise) rotates dynamic driving body 165 towards a direction.Then, if the upper end of pressurized moving body 160 and upper surface Occlusion component 153 is abutted against, moving up for pressurized moving body 160, is stopped, and the rotation for rotating driving body 165 also stops.With Under, by the trip referred to as upper dynamic stroke.

On the other hand, stroke completion statuses are moved on above-mentioned, if importing to the second operating room 112 by upper port 114 High-pressure refrigerant, and by lower port 113 from the first operating room 111 discharge high-pressure refrigerant, due to the first operating room 111 to compare the second operating room 112 be high pressure, so pressurized moving body 160 is pressed downwards, the action pin 163 of pressurized moving body 160 While being induced by keyway 154, pressurized moving body 160 is moved down as the crow flies, with as it does so, the rolling of motion changing mechanism 158 Pearl 172 is also rotated while moving down as the crow flies.Now, helicla flute 175 is embedded in the ball 172 in helicla flute 175 Part press to circumferential direction, rotate driving body 165 and rotate to other directions (be counterclockwise) herein.Then, if pressurized The lower end of moving body 160 abutted against with the convex portion 152a of lower surface occlusion component 152, and pressurized moving body 160 is moved down then Stop, the rotation for rotating driving body 165 also stops.Hereinafter, dynamic stroke under be referred to as the trip.

As described above, in upper dynamic stroke completion statuses, being located at lower dynamic stroke, main valve plug 120 by making pressurized moving body 160 Rotate to heating position from refrigeration position, carry out stream switching as above, in contrast, in lower dynamic stroke completion statuses, Upper dynamic stroke is located at by making pressurized moving body 160, main valve plug 120 is rotated from heating position to refrigeration position, carries out as above institute The stream switching stated.

In the present embodiment, by with upper port 114 and lower port 113, and as the exhaust end of high-pressure section High pressure port D and the direct-acting electromagnetic valve described later 80 of the suction side low-pressure port S connections as low-pressure section, and carry out above-mentioned The switching of stream switching (switching of refrigeration position and heating position), the namely upper dynamic stroke of actuator 107 and lower dynamic stroke.

Above the schematic arrangement of the main valve 105 and actuator 107 of revolving four-way switching valve 2 is illustrated, extremely In detailed construction, the Japanese patent application laid for being referred to the applicant's submission if desired is willing to the description of 2014-252259 Deng.

[structure of direct-acting electromagnetic valve 80]

Hereinafter, with reference to Figure 16 and Figure 17 to Figure 20, the second embodiment to direct-acting electromagnetic valve involved in the present invention Illustrate.

In addition, it is illustrated that the basic structure of the direct-acting electromagnetic valve 80 of second embodiment and the Direct Action Type of first embodiment Electromagnetic valve 50 is roughly the same, thus for the corresponding part of 50 each several part of direct-acting electromagnetic valve, pay identical symbol and save The explanation for slightly repeating, below stresses difference.

As the direct-acting electromagnetic valve 80 of the guide valve of present embodiment, the direct driving type electromagnetic valve base with first embodiment This is the same, in the valve casing 52, starts to be sequentially connected in series from left end side and is configured with for attracting part 55, being made up of collapse coil spring One spring 56, the first plunger 61, the second spring 57 being made up of collapse coil spring, and the second plunger 62, but, attracting On the left of part 55, thicker discoideus permanent magnet 53 to clip the plate 54 being made up of magnetic metal material in-between, and with Cover solenoid 51 section for groove shape overcoat 58 one end side plate-like portion together, by being screwed into above-mentioned attraction part 55 bolt 59 tightens fixation jointly.

It is different that permanent magnet 53 is magnetized to polarity in a thickness direction, relative to attract 55 arranged in series of part, and occurs the One plunger 61 and the second plunger 62 are to the magnetic flux for attracting 55 layback of part near.

In addition, in the inner circumferential of valve casing 52, it is embedded be fixed with compared with first embodiment, cylindric body part 65a The slightly long limiting component 65 of the length of direction of principal axis (left and right directions), the limiting component 65 have and prevent 61 right direction of the first plunger The first mobile locating part 66 and the second locating part 67 for preventing 62 right direction of the second plunger from moving.

In addition, among present embodiment, it is same with first embodiment, two extension 62b of the second plunger 62, The area (the total areas of two extensions 62b, 62b) of close 55 side of attraction part of 62b is set as than the first plunger 61 Near attracting, the area of 55 side of part is little, and the force (assumed load) of the first spring 56 is set as the force than second spring 57 (assumed load) is big, and the right side of the left side of the matrix part 62a of the second plunger 62 and the first plunger 61 (is located at the first plunger 61 Right side contact blocking member 64 right side) between interval G1 and the second plunger 62 extension 62b left end Interval G2 between the right side of face and attraction part 55 is set at essentially identical.

It is in addition, in the valve seat of valve seat 70, same with first embodiment, start to be transversely provided with the to the other end from one end Single port p1, second port p2 and the 3rd port p3, the 4th port p4 separate longer-range to the right from than above-mentioned 3rd port p3 From and arrange, first port p1 passes through the first operating room 111 of the first tubule #1 and above-mentioned main valve 105 (actuator 107) Connection, second port p2 are connected with suction side low-pressure port S by the second tubule #2, and the 3rd port p3 is thin by the 3rd Pipe #3 is connected with the second operating room 112, and the 4th port p4 is connected with suction side low-pressure port S by the 4th tubule #4.

And, in the valve seat of valve seat 70, it is by between above-mentioned first port p1, second port p2 and the 3rd port p3 Connected state is switched over and to being connected to by first valve element of slidingtype 71 of 61 push-and-pull of the first plunger in the way of sliding freely, and And, it is to be switched and the 4th port p4 to being connected to by the slidingtype second of 62 push-and-pull of the second plunger in the way of sliding freely Valve element 72.

The attachment structure of the first valve element 71 and the first valve element 71 and the first plunger 61 is substantially identical with first embodiment, But, here, the second valve element 72, in the shape for combining elongated little semiellipsoid and big semiellipsoid during vertical view.

It is that the second valve element 72 and the second plunger 62 are connected, in above-mentioned second plunger 62, is connected by adding the modes such as hoop, welding The left part for being fixed with the second valve element keeper 76 is connect, the second valve element keeper 76 is configured in the first valve element 71 and the first post The underface of the first valve element keeper 75 of 61 connection of plug, and the right part of the second valve element keeper 76 is positioned at than the first valve element guarantor The right part of gripping member 75 closer to right side, the right-hand member side of the second valve element keeper 76 be formed with elongated round rectangle, and The opening 78 with 77 same widths of opening of above-mentioned first valve element keeper 75 is formed with, the opening 78 is provided with into width A pair of fasteners 79 that side projects.In more left part 78A of the ratio fastener 79 of the opening 78, with left-right direction and thickness The mode that direction can be slided is fitted together to the first valve element 71.Left part 78A length in the lateral direction, is set as first The length that valve element 71 is not interfered when coming and going between left position and right end position with the movement of the first plunger 61.

In addition, more right part 78B of the ratio fastener 79 in opening 78, with left-right direction and above-below direction can be slided Dynamic mode is chimeric the second valve element 72, also, with following forms setting the size shape of the opening 78：In the second plunger 62 When right direction is moved, the pressing of the second valve element 72 is moved to right end position by fastener 79, is moved in 62 left direction of the second plunger When dynamic, the pressing of the second valve element 72 is moved to left position by the right-hand member of opening 78.

In addition, among present embodiment, a left side for the first valve element keeper 75 is fastened on together with the halfbody 75B of right side The plate-shaped springs 68 of the right-hand member plate-like portion 75c of side halfbody 75A, by the second valve element 72 to thickness direction together with the first valve element 71 (above-below direction) exerts a force.

Hereinafter, with reference to Figure 21, to the voltage (be powered/stop and be powered) that applies to solenoid 51 and the first plunger 61 and the Relation between the action of two plungers 62, position, and, and the first plunger 61 and the linkage of the second plunger 62 the first valve element 71 and Relation between the action of the second valve element 72, position is illustrated.Figure 21 is to represent 80 each several part of direct-acting electromagnetic valve at each The catalog of action and position during state (A, A1, B, C, C1).

In the initial setting state of stopping that being powered to solenoid 51, as shown in figure 16, by the first spring 56 and second The force of spring 57, non-attraction position [X2] of first plunger 61 in locking is abutted with the first locating part 66, also, the second post Non- attraction position [X4] of the plug 62 in locking is abutted with the second locating part 67.With as it does so, the first valve element 71 and the first plunger 61 Linkage and be in make second port p2 and the 3rd port p3 connection and by first port p1 open right end position (progressive position) [Y2], also, the second valve element 72 and the second plunger 62 link and be in by the 4th port p4 close closed position (advanced potential Put) [Y4] (state classification：A).

In this condition, if to 51 applied voltage V1 of solenoid, as shown in figure 17, the first plunger 61 is still in One locating part 66 abuts the non-attraction position [X2] of locking, and the second plunger 62 is resisted the force of second spring 57 and is in first The near attraction position [X3] of 61 layback of plunger.Here, although two extension 62b, 62b (left part) of the second plunger 62 with Attract part 55 to abut, but the second plunger 62 is touched blocking member 64 with the directly contact of the first plunger 61 to be prevented.It is adjoint This, the first valve element 71 is linked and is in the 4th end still in above-mentioned right end position [Y2], the second valve element 72 and the second plunger 62 Open position (going-back position) [the Y3] (state classification that mouth p4 is opened：B).

In this condition, if applying the voltage V2 higher than voltage V1, as shown in figure 18, the first plunger to solenoid 51 61 resistance the first springs 56 forces and be in attraction (sorption) position [X1] for being attracted part 55 and furthering, but, the second post Fill in 62 due to locking being abutted with part 55 is attracted, so still in attraction position [X3] as shown in figure 17.With as it does so, the One valve element 71 and the first plunger 61 link and being in connects first port p1 and second port p2 and open the 3rd port p3 Left position (going-back position) [Y1], also, the second valve element 72 is still in above-mentioned open position [Y3] (state classification：C).

In this condition, if stopping being powered to solenoid 51, as shown in figure 19, by the magnetic force of permanent magnet 53, the One plunger 61 is still maintained at attraction (sorption) position [X1], and the second plunger 62 is returned to by the force of second spring 57 Non- attraction position [X4] (state is referred to as without energization locking (latch) state).With as it does so, the first valve element 71 is still in an above-mentioned left side End position [Y1], the second valve element 72 are returned to above-mentioned closed position [Y4] (state classification：C1).

On the other hand, under the above-mentioned blocking without energization, if applying the voltage V2 higher than voltage V1 to solenoid 51, Then as shown in figure 20, the first plunger 61 is still maintained at attraction (sorption) position [X1], and the second plunger 62 resists second spring 57 Force and be in 61 layback of the first plunger is near and two extension 62b, 62b (left part) are abutted with attraction part 55 Attract position [X3].With as it does so, the first valve element 71 is again at still in above-mentioned left position [Y1], also, the second valve element 72 (the state classification of above-mentioned open position [Y3]：C).

Afterwards, if applying opposite polarity voltage-V2 to solenoid 51, the magnetic force of permanent magnet 53 is cancelled, and first Plunger 61 is returned to non-attraction position [X2] by the force of the first spring 56, also, the second plunger 62 passes through the second bullet The force of spring 57 and be returned to non-attraction position [X4].With as it does so, the first valve element 71 is returned to above-mentioned right end position [Y2], Also, the second valve element 72 is returned to above-mentioned closed position [Y4] (state classification：A1).

Among the direct-acting electromagnetic valve 80 of present embodiment, as described above, the direct driving type electromagnetic with first embodiment Valve 50 be identically formed for：According to the voltage applied to solenoid 51, the first plunger 61 is in abutting with the first locating part 66 The non-attraction position [X2] of locking, and to attracting near attraction (sorption) position [X1] of 55 layback of part, at the second plunger 62 In the non-attraction position [X4] of locking is abutted with the second locating part 67, and to 61 layback of the first plunger is near and two extensions 62b, 62b (left part) and the attraction position [X3] for attracting part 55 to abut, with as it does so, the first valve element 71 and the first plunger 61 Linkage and being in makes the right end position (progressive position) [Y2] of second port p2 and the 3rd port p3 connections, and makes first port The left position (going-back position) [Y1] that p1 is connected with second port p2, also, the second valve element 72 and the second plunger 62 link and Closed position (progressive position) [Y4] in the 4th port p4 is closed, and the open position (going-back position) that opens it [Y3]。

[2 molar behavior of rotary type four-way switching valve comprising direct-acting electromagnetic valve 80]

Hereinafter, 2 molar behavior of four-way switching valve comprising direct-acting electromagnetic valve 80 is illustrated.

It is among the four-way switching valve 2 of present embodiment, same with above-mentioned first embodiment, from defrosting operating (refrigeration Operating) to warming operation switch when and when switching from warming operation to defrosting operating (cooling operation), make direct-acting electromagnetic valve Open position (going-back position) of 80 the second valve element 72 in the 4th port p4 is opened, makes the main valve chamber 115 of main valve 105 Pressure is gradually decrease to predetermined pressure P1.

Hereinafter, with reference to Figure 22 sequential chart successively to defrosting operating (cooling operation), from defrosting operating to warming operation Switching, warming operation, illustrate from warming operation to the switching of defrosting operating.

[defrosting (refrigeration) operating]

When operating is defrosted (freeze), stop the energization to solenoid 51.With this, as shown in figure 16, by The force of one spring 56 and second spring 57, non-attraction position of first plunger 61 in locking is abutted with the first locating part 66, Also, non-attraction position of second plunger 62 in locking is abutted with the second locating part 67, with as it does so, the first valve element 71 is in and makes Second port p2 and the right end position of the 3rd port p3 connections, also, pass of second valve element 72 in the 4th port p4 is closed Closed position.

If the first valve element 71 is in the closed position in right end position, the second valve element 72, the height of 210 exhaust end of compressor The cold-producing medium of warm high pressure imports port p10 → valve chamber 60 → the first by exhaust end high pressure port D → high pressure tubule #10 → high pressure Port p1 → the first tubule #1 and be directed to the first operating room 111, also, the high-pressure refrigerant of the second operating room 112 passes through Recess 71a → second port p2 → the second tubule the #2 of three port p3 → the first valve element 71 of the 3rd tubule #3 → the and be discharged to Suction side low-pressure port S, with this, pressurized moving body 160 is located at upper dynamic stroke, and main valve plug 120 rotates 60 degree counterclockwise And it is in refrigeration position.

With this, as shown in figure 13, from compressor 210 High Temperature High Pressure cold-producing medium by exhaust end high pressure port D → First 131 → outside of access pass in and out port C and be directed to outdoor heat converter 220, there heat release and condense.By This, the frost for being attached to outdoor heat converter 220 is melted and removes.The high-pressure refrigerant of condensation, be directed to expansion valve 260 and Decompression, the low pressure refrigerant after decompression are directed to indoor heat converter 230, there carry out heat exchange with room air and steam Send out, from indoor heat converter 230 low-temp low-pressure cold-producing medium by indoor turnover port E → the second access 132 → Suction side low-pressure port S and be returned to the suction side of compressor 210.

[from defrosting operating to the switching of warming operation]

In the switching from defrosting operating to warming operation, to 51 applied voltage V1 of solenoid (time point t1).With this, As shown in figure 17, the first plunger 61 still in the non-attraction position that locking is abutted with the first locating part 66, resist by the second plunger 62 The force of second spring 57 and be in 61 layback of the first plunger is near and extension 62b, 62b (left part) with attract part 55 The attraction position of abutting, with as it does so, the first valve element 71 is still in above-mentioned right end position, 72 left direction of the second valve element is moved and is located In above-mentioned open position, the 4th port p4 is opened.

If the first valve element 71 is in an open position still in right end position, the second valve element 72, the first plunger 61, the first valve Position when core 71 and main valve plug 120 still maintain defrosting (refrigeration) to operate, the high-pressure refrigerant for importing to valve chamber 60 pass through the 4th Port p4 → the 4th tubule #4 and be discharged to suction side low-pressure port S, the pressure of main valve chamber 115 is gradually lowered.

Then, if the reduced pressure of main valve chamber 115 is to predetermined pressure P1, by the voltage applied to solenoid 51 from V1 Bring up to the V2 (time point t2) higher than which.In addition, among present embodiment, the reduced pressure of main valve chamber 115 is to pre- level pressure Power P1, can detect according to the signal from the pressure transducer for being used to detect 115 pressure of main valve chamber.

With this, as shown in figure 18, still in above-mentioned attraction position, the second valve element 72 is still in above-mentioned opening for the second plunger 62 Position, in attraction (sorption) position that part 55 furthers is attracted, companion is as it does so, 71 left direction of the first valve element for the first plunger 61 It is mobile, the left position in making first port p1 connect with second port p2.

If the second valve element 72 is in left position still in open position, the first valve element 71,210 exhaust end of compressor The cold-producing medium of High Temperature High Pressure imports port p10 → valve chamber 60 → the by exhaust end high pressure port D → high pressure tubule #10 → high pressure Three port p3 → the 3rd tubule #3 and be directed to the second operating room 112, also, the first operating room 111 high-pressure refrigerant lead to Cross the recess 71a → second port p2 → the second tubule #2 of the first tubule #1 → first port p1 → the first valve element 71 and be discharged To suction side low-pressure port S, with this, pressurized moving body 160 is located at lower dynamic stroke, and main valve body 120 rotates 60 clockwise Spend and be in heating position.

In this case, just, to after 51 applied voltage V2 of solenoid, the pressure of main valve chamber 115 is from predetermined pressure P1 urgency It is acute to decline, also, during to 51 applied voltage V2 of solenoid, due to the second plunger 62 still in above-mentioned attraction position, the Two valve elements 72 are still in above-mentioned open position, so the 4th port p4 is still opened, the pressure of main valve chamber 115 is further held It is continuous to decline.

Then, if from the time point t2 of applied voltage V2 through the scheduled time, be powered to the stopping of solenoid 51 (when Between point t3).With this, as shown in figure 19, the first plunger 61 still keeps above-mentioned attraction (sorption) position by the magnetic force of permanent magnet 53 (without energization blocking), the first valve element 71 is still in the left position for making first port p1 connect with second port p2, main valve Still in heating position, the second plunger 62 is returned to non-attraction position by the force of second spring 57 to core 120, adjoint This, is as the second valve element 72 is returned to the closed position for closing the 4th port p4, so, the pressure of main valve chamber 115 is no longer Further reduce, pressure when beginning to ramp up common warming operation from time point t3.

With this, the switching from defrosting operating to warming operation is completed, become the warming operation without energization blocking.

[warming operation]

In warming operation, as shown in figure 14, the cold-producing medium from the High Temperature High Pressure of compressor 210 passes through exhaust end high pressure Port D → 133 → indoor of third connecting road passes in and out port E and is directed to indoor heat converter 230, there with Interior Space Gas carries out heat exchange (heating) and condenses, and becomes the two phase refrigerant of high pressure and is directed to expansion valve 260.High-pressure refrigerant quilt The expansion valve 260 reduces pressure, and the low pressure refrigerant after decompression is directed to outdoor heat converter 220, there enters with outdoor air Row heat exchange and evaporate, from outdoor heat converter 220 low-temp low-pressure cold-producing medium by outside pass in and out port C → 4th 134 → suction side of access low-pressure port S and be returned to the suction side of compressor 210.

[from warming operation to the switching of defrosting operating]

On the other hand, in the switching from warming operation to defrosting operating, to 51 applied voltage V2 (time point of solenoid t4).With this, as shown in figure 20, the first plunger 61 still in attract (sorption) position, the first valve element 71 still in left position, Second plunger 62 is resisted the force of second spring 57 and is in 61 layback of the first plunger is near and extension 62b, 62b (left end Portion) with attract the attraction position that abuts of part 55, with as it does so, 72 left direction of the second valve element is moved and is in above-mentioned open position Put, the 4th port p4 is opened.

If the first valve element 71 is in an open position still in left position, the second valve element 72, the first plunger 61, the first valve Core 71 and main valve plug 120 still maintain position during warming operation, and the high-pressure refrigerant for importing to valve chamber 60 passes through the 4th port P4 → the 4th tubule #4 and be discharged to suction side low-pressure port S, the pressure of main valve chamber 115 is gradually lowered.

Then, if the reduced pressure of main valve chamber 115 applies opposite polarity electricity to solenoid 51 to predetermined pressure P1 Press a V2 (time point t5).

With this, the magnetic force of permanent magnet 53 is cancelled, by the first spring 56 and the force of second spring 57, the first plunger 61 Be returned to abut with the first locating part 66 locking non-attraction position, also, the second plunger 62 be returned to it is spacing with second Part 67 abuts the non-attraction position of locking, with as it does so, the first valve element 71 is in makes what second port p2 and the 3rd port p3 were connected Right end position, also, the second valve element 72 is returned to the closed position for closing the 4th port p4.

In this case, just, to after 51 applied voltage-V2 of solenoid, the pressure of main valve chamber 115 is from predetermined pressure P1 Drastically decline, but, the pressure of main valve chamber 115 is no longer further reduced, and begins to ramp up common removing from time point t5 Pressure when white (refrigeration) operates.

If stopping energization (time point t6) to solenoid 51 through the scheduled time from time point t5.With this, complete From warming operation to the switching of defrosting operating, become without defrosting (refrigeration) operating being powered.

[effect of the direct-acting electromagnetic valve 80 and four-way switching valve 2 of second embodiment]

As from the description above it should be understood that in the direct-acting electromagnetic valve 80 using this second embodiment as guide valve And among the rotary type four-way switching valve 2 for possessing, be also configured to：When switching from defrosting operating to warming operation and from confession Warm operating to defrosting operating switch when, make the second valve element 72 of direct-acting electromagnetic valve 80 in an open position, make main valve chamber 115 Pressure is gradually lowered to predetermined pressure, so, cutting to warming operation from warming operation to defrosting operating and from defrosting operating When changing, it is not necessary to the too big frequency for reducing compressor 210, it becomes possible to reduce the pressure differential of high-pressure side and low-pressure side, therefore, it is possible to Noise, and the time that the pressure of cold-producing medium can be shortened to return to required high pressure and needed are effectively reduced, with as it does so, can Shorten from warming operation to into the time required for defrosting operating and warm air from indoor heat converter 230 out when Between.

Like this, among the heat pump type refrigerating heating system 200 of present embodiment, noise can be reduced fast Carried out from warming operation fastly to defrosting operating and from defrosting operating to the switching of warming operation, added, it is not necessary to direct acting Electromagnetic valve beyond formula electromagnetic valve 80, so based on fairly simple structure, cooling operation, warming operation and defrosting can be carried out Operating, therefore, it is possible to reduce setup cost and component costs.

Further, permanent magnet 53 is set in direct-acting electromagnetic valve 80 and is formed as the electromagnetic valve of self maintenance, so, In cooling operation (during defrosting operating) and during warming operation, the energization to solenoid 51 can be stopped, being saved with this The energy.

In addition, becoming in above-mentioned direct-acting electromagnetic valve 80 in the relation of the electromagnetic valve of self maintenance, due to power failure not Clear first plunger 61 is positioned at the attraction position or non-attraction potential for being attracted 55 sorption of part by the magnetic force of permanent magnet 53 When putting, at the beginning of operating restarts, it is also possible to first the first plunger 61 (is inhaled in attraction to 51 applied voltage V2 of solenoid ) position etc., start common operating control after its position is grasped again.

In addition, among the direct-acting electromagnetic valve 80 of present embodiment, being provided with a part for 62 peripheral part of the second plunger By the outside of the first plunger 61 and to the extension 62b for attracting 55 side of part (left end side) to extend, the second plunger 62 and attract The distance between part 55 becomes near, can produce captivation with few magnetomotive force, so magnetic effect is uprised, with this, carry out From warming operation to defrosting operating and from defrosting operating when the switching of warming operation, the switching action of direct-acting electromagnetic valve 80 is made Become easy.

In addition, among the direct-acting electromagnetic valve 80 of present embodiment, when making the second valve element 72 in an open position, Extension 62b, 62b (left part) of two plungers 62 is abutted with part 55 is attracted, and second plunger 62 is attracted part 55 and supports Locking is connect, so, carrying out from warming operation to defrosting operating and from defrosting operating, when the switching of warming operation, making Direct Action Type The switching action of electromagnetic valve 80 can be stabilized.

In addition, among above-mentioned embodiment, illustrate using direct-acting electromagnetic valve 50 as slidingtype four-way switching valve 1 Guide valve and the first embodiment that uses and will make with the direct-acting electromagnetic valve 80 of 50 different structure of direct-acting electromagnetic valve The second embodiment used for the guide valve of revolving four-way switching valve 2, it is also possible to by above-mentioned direct-acting electromagnetic valve 50 Adopt as the guide valve of revolving four-way switching valve 2, it is also possible to using above-mentioned direct-acting electromagnetic valve 80 as slidingtype The guide valve of four-way switching valve 1 and adopt, this is not required to repeat.

In addition, among above-mentioned embodiment, omitting in the direct-acting electromagnetic valve 50 using the second valve element of hoisting type Permanent magnet 53 (and the plate 54 being made up of magnetic material), in the direct-acting electromagnetic valve 80 using the second valve element of slidingtype Permanent magnet 53 is provided with, but it is also possible to permanent magnet is adopted in the direct-acting electromagnetic valve 50 using the second valve element of hoisting type And produce without energization blocking, it is also possible to permanent magnetism is omitted in the direct-acting electromagnetic valve 80 using the second valve element of slidingtype Body, and apply the voltage V3 lower than voltage V2 to solenoid 51 to produce and the above-mentioned shape same without energization blocking State, voltage V2 are that the first plunger 61 is maintained at attraction (sorption) position (force of second plunger 62 by second spring 57 And it is returned to non-attraction position) voltage of degree.

Claims

1. a kind of direct-acting electromagnetic valve, it is characterised in that formed in the following manner：

The outer valve casing for being fixed with solenoid in side periphery at one end, start to be sequentially connected in series from a side be configured with attraction part, First plunger and the second plunger, also, second plunger a part be provided with the outside by first plunger and to The extension for attracting component side to extend, close the described area for attracting component side of the extension are formed as than described the The area of the close described attraction component side of one plunger is little, the more another side of the second plunger described in the ratio in the valve casing, if There is master port, and be provided with the valve seat with first, second, third and fourth port, in the valve seat, be by described first, second And the 3rd the connected state between port switch over and to being connected to and first plunger linkage in the way of sliding freely First valve element, also, be by the 4th port switched and docked in the way of sliding freely or with can away from be close to Mode be configured with the second valve element with second plunger linkage, according to the voltage applied to the solenoid, described the One plunger and first valve element and second plunger and second valve element are respectively at multiple positions.

2. a kind of direct-acting electromagnetic valve, it is characterised in that formed in the following manner：

The outer valve casing for being fixed with solenoid in side periphery at one end, start to be sequentially connected in series from a side be configured with attraction part, The first spring, the first plunger, the second spring being made up of collapse coil spring and the second plunger being made up of collapse coil spring, Also, the outside by first plunger is provided with a part for second plunger and attract what component side extended to described Extension, the area of the close described attraction component side of the extension are formed as the close described attraction than first plunger The area of component side is little, is to prevent first plunger and second plunger from being provided with the first locating part to another side movement With the second locating part,

The more another side of the second plunger described in the ratio in the valve casing, is provided with high pressure and imports port, and be provided with first, the Two and the 3rd port and the valve seat of the 4th port, in the valve seat, are by the connection between first, second, and third port State is switched over and to being connected to by the first valve element of the slidingtype of the first plunger push-and-pull in the way of sliding freely, and And, it is to be switched and the 4th port to being connected to by the slidingtype of the second plunger push-and-pull in the way of sliding freely The second valve element or by can away from the second valve element that hoisting type is configured with the way of close,

According to the voltage applied to the solenoid, first plunger and second plunger be respectively at attraction position and Non- attraction position, first valve element and first plunger link and being in connects the first port and the second port A logical end position and another end position that the second port connected with the 3rd port is made, also, second valve Core is linked with second plunger and is in the open position of the 4th port opening and the closed position being turned off.

3. direct-acting electromagnetic valve according to claim 2, it is characterised in that

In the groove of the peripheral part for being formed at first plunger, insert has the extension.

4. direct-acting electromagnetic valve according to claim 2, it is characterised in that

The one end of the first valve element keeper is fixedly connected with first plunger, a side of the first valve element keeper with The mode intercalation for sliding freely in second plunger, in the another side of the first valve element keeper, first valve element with First plunger links and is connected in the way of in an end position and another end position, chimeric or card Close.

5. direct-acting electromagnetic valve according to claim 4, it is characterised in that

In the valve seat, first, second, and third port and the 4th port are from one end to the other side transversely provided with,

The one end of the second valve element keeper is fixedly connected with second plunger, the other end of the second valve element keeper Positioned at the more another side of the other end than the first valve element keeper, in the another side of the second valve element keeper, Second valve element of the slidingtype is linked with second plunger and with the side in the open position and the closed position Formula and be connected, it is chimeric or engaging.

6. direct-acting electromagnetic valve according to claim 4, it is characterised in that

In the valve seat, first, second, and third port is from one end to the other side transversely provided with, also, in the valve seat End face be provided with the 4th port,

In second plunger, the second valve element of the hoisting type link with second plunger and with the open position and The mode of the closed position and be connected, it is chimeric or engaging.

7. direct-acting electromagnetic valve according to claim 2, it is characterised in that

To prevent the directly contact of first plunger and second plunger, it is provided with in-between and is made up of nonmagnetic substance Contact blocking member.

8. direct-acting electromagnetic valve according to claim 2, it is characterised in that

The force of first spring is set as bigger than the force of the second spring.

9. direct-acting electromagnetic valve according to claim 2, it is characterised in that formed in the following manner：

In the state of stopping being powered to the solenoid, by first spring and the force of the second spring, institute State the first plunger in abut with first locating part locking non-attraction position, also, second plunger in institute The non-attraction position that the second locating part abuts locking is stated, with this, first valve element is in another end position, also, institute The second valve element is stated in the closed position,

In this condition, if to the solenoid apply first voltage, first plunger still in described first limit Position part abuts the non-attraction position of locking, and second plunger is resisted the force of the second spring and is in first post Plug layback is near and the extension and the attraction position for attracting part to abut, and with this, first valve element is still in described Another end position, second valve element are in the open position,

In this condition, if applying the second voltage higher than the first voltage, first plunger to the solenoid Resist the force of first spring and to be in and attracted the attraction position furthered of part by described, but second plunger still in The attraction position, with this, first valve element is in an end position, also, second valve element is beaten still in described Open position,

In this condition, if applying the tertiary voltage lower than first and second voltage to the solenoid, described the One plunger is still maintained at the attraction position by the captivation for attracting part, and second plunger passes through described second The force of spring and be returned to the non-attraction position, with this, first valve element still in an end position, described Two valve elements are returned to the closed position.

10. direct-acting electromagnetic valve according to claim 9, it is characterised in that formed in the following manner：

To the solenoid apply the tertiary voltage, first plunger by the captivation of the attraction part still by Be maintained at the attraction position and second plunger also still in the non-attraction position in the state of, if to the electricity Magnetic coil applies the second voltage, then first plunger is still maintained at the attraction position, and second plunger is resisted The force of the second spring and be in that near to the first plunger layback and the extension attracts what part was abutted with described Attract position, with this, first valve element is in the open position still in an end position, second valve element,

Afterwards, if stopping being powered to the solenoid, first plunger is returned by the force of first spring The non-attraction position is returned to, also, second plunger is returned to the non-suction by the force of the second spring Draw position, with this, first valve element is returned to another end position, also, second valve element be returned to it is described Closed position.

11. direct-acting electromagnetic valves according to claim 2, it is characterised in that

In a side of the attraction part of the valve casing, permanent magnet is configured with.

12. direct-acting electromagnetic valves according to claim 11, it is characterised in that formed in the following manner：

In this condition, if stopping being powered to the solenoid, first plunger passes through the magnetic force of the permanent magnet still The attraction position is maintained at, second plunger is returned to the non-attraction potential by the force of the second spring Put, with this, first valve element is returned to the closed position still in an end position, second valve element.

13. direct-acting electromagnetic valves according to claim 12, it is characterised in that formed in the following manner：

The suction is still maintained at by the magnetic force of the permanent magnet energization, first plunger is stopped to the solenoid Draw position and second plunger also still in the non-attraction position in the state of, if applying institute to the solenoid Second voltage is stated, then first plunger is still maintained at the attraction position, second plunger resists the second spring Force and be in the first plunger layback is near and the extension and the attraction position for attracting part to abut, with This, first valve element is in the open position still in an end position, second valve element,

Afterwards, if applying opposite polarity tertiary voltage to the solenoid, the magnetic force of the permanent magnet is cancelled, described First plunger is returned to the non-attraction position by the force of first spring, also, second plunger passes through The force of the second spring and be returned to the non-attraction position, with this, first valve element is returned to described another End position, also, second valve element is returned to the closed position.

14. direct-acting electromagnetic valves according to claim 2, it is characterised in that

First locating part and second locating part, are fixed on the limiting component of the valve casing inner circumferential, are located at institute by configuration Among a part for the stepped portion and the valve seat of stating valve casing any one and constitute.

A kind of 15. four-way switching valves, be used in heat pump type refrigerating heating system for switching cold-producing medium flow direction The four-way switching valve of slidingtype, the heat pump type refrigerating heating system be with can by cooling operation, warming operation and will refrigeration Agent carries out the mode of selection to the defrosting operating with identical direction flowing during cooling operation and is formed, it is characterised in that with Following manner is constituted：

Possess the direct-acting electromagnetic valve any one of claim 2 to 14 as guide valve, and possess the four of cylinder type Port valve main body,

In the four-way valve body, from a side start to be configured with successively the first operating room, first piston, main valve chamber, second piston, Second operating room, is provided with the exhaust end high pressure port being connected with the exhaust end of compressor, and is provided with main valve seat in the main valve chamber, In the valve seat of the main valve seat, start to be sequentially provided with from a side outside turnover port that is connected with outdoor heat converter and The suction side low-pressure port and the indoor in-out end being connected with indoor heat converter of the suction side connection of the compressor Mouthful, and to being connected to section as the bowl-shape main valve plug that stands upside down in the way of sliding freely, the main valve plug selectively can be in will Open and make the suction side low-pressure port that the refrigeration position that port connects is passed in and out with the indoor in the outside turnover port Put, and indoor turnover port opened and connects the suction side low-pressure port and outside turnover port Heating position,

The high pressure of the direct-acting electromagnetic valve is imported port and be connected with the exhaust end high pressure port, the first port and First operating room connection, the second port are connected with the suction side low-pressure port, the 3rd port and described the Two operating rooms connect, also, the 4th port is connected with the suction side low-pressure port,

When switching when switching from defrosting operating to warming operation and from warming operation to defrosting operating, the Direct Action Type is made Open position of second valve element of electromagnetic valve in the 4th port is opened, enables the pressure of the main valve chamber to drop It is low to predetermined pressure.

16. four-way switching valves according to claim 15, it is characterised in that

The first piston and the second piston integrally can be movably attached by main connector, in the main connection Body, the main valve plug is with adjoint first and second the reciprocating for piston in the refrigeration position and the heating position Between carry out round mode and be connected, it is chimeric or engaging.

17. four-way switching valves according to claim 15, it is characterised in that

One end side cover shape part is fixed with one end of the four-way switching valve, one end side cover shape part is as described to prevent The locating part that first piston is moved to an extreme direction, is fixed with another side lid portion in the other end of the four-way switching valve Part, the another side lid part is as the locating part to prevent the second piston from moving to another extreme direction.

A kind of 18. four-way switching valves, be used in heat pump type refrigerating heating system for switching cold-producing medium flow direction Revolving four-way switching valve, the heat pump type refrigerating heating system is can be by cooling operation, warming operation and by cold-producing medium The mode of selection is carried out to the defrosting operating with identical direction flowing during cooling operation and is formed, it is characterised in that below The mode of stating is constituted：

Possess the direct-acting electromagnetic valve any one of claim 2 to 14 as guide valve, and possess main valve, the main valve Have：The main valve case of the tubular of graduation main valve chamber；The main valve plug of the main valve chamber is configured in rotatably；And use In it is making that the main valve plug rotates, with high-pressure refrigerant selectively being imported or the first of variable volume working of discharging Room and the actuator of the second operating room,

The exhaust end high pressure port that is connected with the exhaust end of compressor and outdoor heat converter connection are provided with the main valve case Outside is passed in and out the suction side low-pressure port of the suction side connection of port and the compressor and is connected with indoor heat converter Connect indoor turnover port, by control high-pressure refrigerant to first operating room and second operating room importing or Discharge and make the main valve plug to rotate, and carry out the switching between communications ports, carried out from refrigeration or defrosting operating to confession with this Warm operating, and from warming operation to the switching of refrigeration or defrosting operating,

19. four-way switching valves according to claim 18, it is characterised in that

In the hermetically closed upside valve seat of the upper surface open and lower surface opening by the main valve case and downside valve seat, it is provided with The exhaust end high pressure port, outside turnover port, the suction side low-pressure port and the indoor in-out end Mouthful.

20. four-way switching valves according to any one of claim 15 to 19, it is characterised in that formed in the following manner：

Possesses the control unit to the solenoid applied voltage of the direct-acting electromagnetic valve for control, by the control Portion, when switching from defrosting operating to warming operation, applies first voltage to the solenoid first, makes second valve element In the open position, with this, the reduced pressure of the main valve chamber is applied to the backward solenoid of the predetermined pressure Plus the second voltage higher than the first voltage, after making first valve element be in an end position, to the electromagnetism Coil applies the tertiary voltage lower than the second voltage,

On the other hand, when switching from warming operation to defrosting operating, apply the second voltage to the solenoid, make institute The second valve element is stated in the open position, with this, the reduced pressure of the main valve chamber stop to after the predetermined pressure to The energization of the solenoid, makes first valve element be in another end position.

21. four-way switching valves according to any one of claim 15 to 19, it is characterised in that formed in the following manner：

Possesses the control unit to the solenoid applied voltage of the direct-acting electromagnetic valve for control, by the control Portion, when switching from defrosting operating to warming operation, applies first voltage to the solenoid first, makes second valve element In the open position, with this, the reduced pressure of the main valve chamber is applied to the backward solenoid of the predetermined pressure Plus the second voltage higher than the first voltage, making first valve element after the end position, stop to described Solenoid is powered,

On the other hand, when switching from warming operation to defrosting operating, apply the second voltage to the solenoid, make institute The second valve element is stated in the open position, with this, the reduced pressure of the main valve chamber is to the backward described of the predetermined pressure Solenoid applies opposite polarity tertiary voltage, making first valve element after another end position, stop to The energization of the solenoid.

22. four-way switching valves according to claim 20, it is characterised in that

Equipped with for detecting the pressure transducer of the pressure of the main valve chamber, the control unit is formed as：According to from the pressure The signal that force transducer is obtained, detects the reduced pressure of the main valve chamber to the predetermined pressure.