WO2010058563A1 - Variable capacity compressor - Google Patents
Variable capacity compressor Download PDFInfo
- Publication number
- WO2010058563A1 WO2010058563A1 PCT/JP2009/006186 JP2009006186W WO2010058563A1 WO 2010058563 A1 WO2010058563 A1 WO 2010058563A1 JP 2009006186 W JP2009006186 W JP 2009006186W WO 2010058563 A1 WO2010058563 A1 WO 2010058563A1
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- WO
- WIPO (PCT)
- Prior art keywords
- gas
- discharge chamber
- control valve
- passage
- opening
- Prior art date
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- 239000003507 refrigerant Substances 0.000 claims abstract description 27
- 238000006073 displacement reaction Methods 0.000 claims description 4
- 238000004519 manufacturing process Methods 0.000 abstract description 4
- 238000012986 modification Methods 0.000 abstract description 2
- 230000004048 modification Effects 0.000 abstract description 2
- 239000000126 substance Substances 0.000 description 7
- 230000015572 biosynthetic process Effects 0.000 description 5
- 239000000463 material Substances 0.000 description 4
- 238000007599 discharging Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000033001 locomotion Effects 0.000 description 2
- 230000007257 malfunction Effects 0.000 description 2
- 230000001276 controlling effect Effects 0.000 description 1
- 239000002826 coolant Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 238000005057 refrigeration Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
Images
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B27/00—Multi-cylinder pumps specially adapted for elastic fluids and characterised by number or arrangement of cylinders
- F04B27/08—Multi-cylinder pumps specially adapted for elastic fluids and characterised by number or arrangement of cylinders having cylinders coaxial with, or parallel or inclined to, main shaft axis
- F04B27/14—Control
- F04B27/16—Control of pumps with stationary cylinders
- F04B27/18—Control of pumps with stationary cylinders by varying the relative positions of a swash plate and a cylinder block
- F04B27/1804—Controlled by crankcase pressure
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B53/00—Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
- F04B53/20—Filtering
Definitions
- the present invention relates to a variable displacement compressor, and more particularly to a variable displacement compressor that can prevent foreign matter from flowing into a displacement control valve.
- a capacity control valve is provided, and the refrigerant gas in the discharge chamber formed in the cylinder head is supplied to the crank chamber via the capacity control valve and the gas supply passage, and the crank chamber is supplied via the gas discharge passage from the crank chamber.
- the pressure in the crank chamber is adjusted, and the stroke of the piston inserted in the cylinder bore of the cylinder block is variably controlled by adjusting the pressure.
- Such variable capacity compressors are well known. In such a variable capacity compressor, when the refrigerant gas in the discharge chamber is supplied to the crank chamber, the gas pressure and the gas flow rate are adjusted by the capacity control valve in the middle of the path.
- Patent Document 1 a structure in which a filter is installed at the inlet of the refrigerant gas inflow passage to the capacity control valve so that foreign matter does not flow into the capacity control valve (for example, Patent Document 1) or capacity control.
- Patent Document 2 a structure in which a filter is installed at the inlet of the refrigerant gas inflow passage to the capacity control valve so that foreign matter does not flow into the capacity control valve.
- the capacity control valve In general, in the case of a variable capacity compressor of an external signal control system, in a normal layout, the capacity control valve is often installed on the lower side of the compressor, and a passage for introducing refrigerant gas into the capacity control valve and its discharge chamber side The opening is often located near the bottom surface of the compressor where foreign matter tends to accumulate. Therefore, in many cases, the arrangement structure is such that the possibility of blockage of the control passage and malfunction of the valve body inside the control valve due to the inflow of foreign matter cannot be completely eliminated.
- Patent Document 1 since it is necessary to install a filter or configure a structure for fixing the filter, the internal structure of the compressor is complicated, and the number of parts associated with the filter installation is increased. Therefore, there is a problem that an increase in assembly man-hours and an increase in manufacturing costs are caused.
- the structure of the said patent document 2 since it is set as the channel
- the object of the present invention is to pay attention to the above-mentioned problems and to prevent foreign matter from flowing into the capacity control valve with a simple improvement while suppressing an increase in manufacturing cost, an increase in size of the compressor, and an increase in weight. It is providing the variable capacity compressor provided with.
- a variable capacity compressor supplies a refrigerant gas in a discharge chamber formed in a cylinder head to a crank chamber via a capacity control valve and a gas supply passage, and discharges a gas.
- the refrigerant gas in the crank chamber is discharged to a suction chamber formed in the cylinder head through a passage to regulate the crank chamber, and by the pressure regulation, the piston inserted into the cylinder bore of the cylinder block is reciprocally movable.
- the refrigerant gas in the discharge chamber is moved to the capacity control valve side between any of the gasket, discharge valve forming member, and valve plate interposed between the cylinder head and the cylinder block.
- a gas passage that can be introduced toward the discharge chamber is formed and an opening into the discharge chamber is provided at one end of the gas passage, and the other end of the gas passage is connected to the cylinder head.
- a gas introduction path for control from the discharge chamber to the capacity control valve is formed by the gas passage and the gas introduction path by connecting to the inlet of the gas introduction path to the capacity control valve that is formed and directly communicates with the capacity control valve. It consists of what is characterized by.
- a gas passage for introducing the refrigerant gas in the discharge chamber toward the capacity control valve side is provided between any one of the gasket, the discharge valve forming member, and the valve plate.
- the gas inflow side opening of the gas passage is opened into the discharge chamber at an appropriate position.
- the other end of the gas passage is connected to an inlet of a gas introduction path that directly communicates with the capacity control valve, and the gas passage and the gas introduction path provide another control gas introduction path from the discharge chamber to the capacity control valve. It is formed as a dedicated path that is separated from the site.
- the refrigerant gas inflow port from the discharge chamber of the control gas introduction path that is, the gas inflow side opening of the gas passage is substantially at an arbitrary position.
- the gas inflow side opening By setting the gas inflow side opening at an appropriate position, particularly at the upper position away from the bottom surface side where foreign substances tend to accumulate in the discharge chamber, foreign substances into the control gas introduction path can be set. It is possible to easily prevent the inflow. As a result, even when the capacity control valve is installed on the lower side of the compressor, the inflow of foreign matter into the passage leading to the capacity control valve and the capacity control valve is prevented, and the passage blockage and the capacity control valve The occurrence of malfunction is reliably prevented.
- the gas passage is formed between any one of the gasket, the discharge valve forming member, and the valve plate. Therefore, basically, the cylinder head and the compressor as a whole are increased in size and weight. There is nothing.
- this gas passage can be provided very simply by forming a groove or the like of a predetermined shape in any of the above members. It can be implemented at a very low cost without incurring an increase in the number of assembly steps or man-hours.
- variable capacity compressor it is preferable that the opening of the gas passage into the discharge chamber is arranged at the upper portion of the discharge chamber.
- the upper side in the discharge chamber is much less likely to accumulate foreign matter than the bottom side, and therefore the inflow of foreign matter can be more easily prevented by introducing the control refrigerant gas from there.
- the capacity control valve is installed on the lower side of the cylinder head, and the gas passage connected to the inflow port extends upward with respect to the inflow port of the gas introduction path to the capacity control valve.
- a structure is also preferable.
- the control valve is connected via a gas passage extending from the upper side to the lower side and a gas introduction path connected to the lower end thereof. Since the refrigerant gas can be supplied to the capacity control valve, it becomes possible to easily avoid the bottom side portion in the compressor where foreign substances are likely to flow in, and to prevent foreign substances from flowing in as much as possible.
- both gas passages are connected to the inlet of the gas introduction passage from opposite directions. It can be set as a structure. If the openings into the discharge chambers of both gas passages are set at positions slightly apart, the possibility of both openings being clogged at the same time can be easily avoided.
- the opening of the gas passage into the discharge chamber may be configured by a plurality of small holes (for example, a mesh-shaped configuration). If comprised in this way, it will become possible to make this opening part play a role of a kind of filter, can prevent the entrance of a foreign material, and can prevent the inflow of a foreign material more reliably.
- the opening of the gas passage into the discharge chamber can employ a structure that is expanded toward the discharge chamber. If comprised in this way, it can be set as the structure where the inflow speed of refrigerant
- the opening to the discharge chamber of the expanded gas passage is formed downward in the discharge chamber, it is possible to drop the foreign material downward using its own weight. It is possible to make the structure difficult to flow in.
- variable capacity compressor can be applied to any compressor having a control gas introduction path to the capacity control valve, and particularly has high durability, long-term stable performance, low It is suitable for a compressor used in a vehicle air conditioner that is required to be implemented at a low cost.
- the gas passage capable of setting the position of the discharge chamber side opening serving as the gas inflow port substantially arbitrarily and the gas introduction passage connected to the gas passage are provided. Since the control gas introduction path from the discharge chamber to the capacity control valve can be configured, the gas inlet from the discharge chamber can be easily set at the upper position where foreign substances do not easily flow in, and the parts can be substantially A simple and inexpensive improvement without increasing the number of points and without increasing the size and weight can reliably prevent foreign substances from flowing into the capacity control valve and the passage leading to it. As a result, desired capacity control can be performed stably over a long period of time.
- variable capacity compressor It is a longitudinal cross-sectional view of the variable capacity compressor which concerns on one embodiment of this invention. It is a perspective view of the cylinder head of the variable capacity compressor of FIG. It is a disassembled perspective view of the gasket, the discharge valve formation member, and the valve plate which shows the gas passage formation structure of the variable capacity compressor of FIG. It is a schematic partial block diagram of a gasket, a discharge valve forming member, and a valve plate showing various forms for forming a gas passage in the present invention. It is the see-through
- a variable capacity compressor 1 has a cylinder block 2, a cylinder head 3 provided on both sides thereof, and a crankcase 4 (front housing).
- a plurality of cylinder bores 5 are provided in the cylinder block 2.
- a piston 6 is inserted into each cylinder bore 5 so as to reciprocate.
- a crank chamber 7 is formed in the crankcase 4, and a swash plate 8 having a variable inclination angle is provided in the crank chamber 7 so as to be rotatable integrally with the drive shaft 11 via a rotor 9 and a hinge mechanism 10. It has been.
- a pair of shoes 12 held on one end side of the piston 6 are slidably contacted with both surfaces of the outer peripheral portion of the swash plate 8, and the rotational movement of the swash plate 6 is caused to reciprocate the piston 6 through the sliding contact. While being converted, the stroke of the reciprocating motion of the piston 6 can be variably controlled according to the inclination angle of the swash plate 6.
- the inclination angle of the swash plate 6 is adjusted by adjusting the pressure of the crank chamber 7 described below, whereby the stroke of the piston 6 can be variably controlled.
- a suction chamber 13 and a discharge chamber 14 around the suction chamber 13 are formed in the cylinder head 3, and the pressure in the crank chamber 7 is adjusted on the lower side of the cylinder head 3 based on an external signal.
- a capacity control valve 15 is provided for controlling the capacity of the compressor 1 through the pressure.
- a gasket 16 (a retainer-integrated gasket having a retainer function for restricting the opening of the discharge valve)
- a discharge valve forming member 17 are interposed, and these members, together with the cylinder head 3, the cylinder block 2, and the crankcase 4, are fixed and fastened in a predetermined positional relationship by a through bolt 19.
- the valve plate 19 is provided with an orifice 20, and the orifice 20 forms a part of a gas discharge passage 21 for discharging the refrigerant gas in the crank chamber 7 to the suction chamber 13.
- the crank chamber 7 is regulated by supplying the refrigerant gas in the discharge chamber 14 to the crank chamber 7 via the capacity control valve 15 and the gas supply passage 22 and supplying the refrigerant gas in the crank chamber 7 via the gas discharge passage 21. This is done by discharging to the suction chamber 13.
- the stroke of the piston 6 is variably controlled as described above.
- a control gas introduction passage 23 from the discharge chamber 14 to the capacity control valve 15 is connected to the gas passage 24 and the gas passage 24, and directly communicates with the capacity control valve 15. And a gas introduction path 25 to the surface.
- the gas passage 24 has an opening 26 into the discharge chamber 14 at one end (upper end), and the other end (lower end) 27 is an inlet of the gas introduction path 25 formed as shown in FIG. 28.
- the inlet 28 of the gas introduction path 25 is set at a position substantially flush with the end face of the cylinder head 3.
- the gas passage 24 of the control gas introduction passage 23 is formed as shown in FIG. 3, FIG. 4 (A), and FIG.
- a gas passage 24 is formed by carving a groove in the valve plate 18, and in this embodiment, a plurality of gas passages 24, particularly, two communicating with each other and extending in a semicircular shape.
- Gas passages 24a and 24b are provided. Each opening 26a, 26b to the discharge chamber 14 of these gas passages 24a, 24b is set at a position slightly apart.
- These gas passages 24a and 24b have a common lower end 27 and are connected to the inlet 28 of the gas introduction path 25 as described above.
- the discharge valve forming member 17 and the gasket 16 also correspond to the openings 29a and 29b and the openings 30a and 30b corresponding to the openings 26a and 26b and the lower end 27 for introducing gas from the discharge chamber 14, respectively.
- communication holes 31 and 32 to the inlet 28 of the gas introduction path 25 are provided.
- the gas passage 24 is formed by engraving a groove in the valve plate 18, but as shown in FIG. Without processing the plate 18, a groove may be formed in the discharge valve forming member 17 to form a gas passage 24 between the valve plate 18 and the gasket 16, as shown in FIG.
- the gas passage 24 may be formed on the gasket 16 side without processing the valve plate 18 and the discharge valve forming member 17.
- FIG. 5 shows the gas passage 24 formed in the form shown in FIG. 3 as a perspective view in an assembled state of each member.
- the refrigerant gas in the discharge chamber 14 is gas from the opening 26 (26a, 26b) as shown by an arrow A in FIGS. After being introduced into the passage 24 (24a, 24b) and flowing through the gas passage 24 (24a, 24b), it is supplied from the lower end 27 of the gas passage 24 through the inlet 28 to the capacity control valve 15 through the gas introduction passage 25. After the flow rate and pressure are controlled by the capacity control valve 15, as shown by the arrow B in FIG. 1, it is supplied to the crank chamber 7. The paths indicated by arrows A and B form a gas supply passage 22 to the crank chamber 7.
- the gas passage 24 of the control gas introduction passage 23 to the capacity control valve 15 is formed by a groove formed in the valve plate 18 in this embodiment, and is covered with the discharge valve forming member 17. Since the middle of the passage is configured to be sealed, the opening 26 on the discharge chamber 14 side of the gas passage 24 can be set at a substantially arbitrary position. As shown in FIG. 1, the position of the opening 26 is set to a position on the upper side away from the bottom side portion where the foreign matter in the discharge chamber 14 is likely to accumulate with respect to the discharge chamber 14 side. It is possible to easily prevent foreign substances from flowing into the introduction path 23 and further into the capacity control valve 15. In particular, as shown in FIG.
- two openings 26a and 26b are set at positions slightly apart from each other so as to reach the inlet 28 of the gas introduction passage 25 from the left and right gas passages 24a and 24b. If any of the openings 26a and 26b or the gas passages 24a and 24b has a problem due to the inflow of foreign matter, the other opening and the gas passage lead to the capacity control valve 15. As a result, the control gas introduction path 23 is secured, and the occurrence of problems related to capacity control is prevented.
- the gas passage 24 that can prevent the inflow of foreign matter into the control gas introduction path 23 and further into the capacity control valve 15 is any of the gasket 16, the discharge valve forming member 17, and the valve plate 18.
- the gas passage 24 may be formed as a passage separated from other parts by forming a groove between the members.
- the formation of the gas passage 24 basically increases the number of parts, increases the weight, and compresses the compressor. It can be implemented at a low cost without increasing the size. Therefore, a variable capacity compressor having a mechanism in which foreign matter does not easily flow into the capacity control valve with a simple improvement while suppressing an increase in manufacturing cost, an increase in size of the compressor, and an increase in weight, which are the problems of the present invention. Providing is surely realized.
- variable capacity compressor 1 various modifications can be adopted as compared with the variable capacity compressor 1 according to the above embodiment.
- the discharge chamber 14 side inlet of the gas passage 24, for example, the opening 42 of the gasket 41 can be configured as an opening 42 having a plurality of small holes 43. In such a configuration, it becomes possible to give this opening 42 a function of a kind of filter, and it is possible to more reliably prevent foreign matter from entering the gas passage 24.
- FIG. 7 a structure is adopted in which the gas inflow side opening 53 of the gas passage 52 formed by engraving the valve plate 51 is greatly expanded toward the discharge chamber 14 side. Can do. If comprised in this way, the inflow speed of the refrigerant gas at the inlet of the control gas introduction path can be reduced, and even if foreign matter is mixed in at the time of inflow, the foreign matter can be separated from the inflow gas. Therefore, a structure in which foreign matter is less likely to flow in through the control gas introduction path can be obtained.
- the opening 53 into the discharge chamber 14 of the expanded gas passage 52 is formed so as to open toward the lower side of the discharge chamber 14.
- the foreign matter can be dropped downward by utilizing the dead weight of the foreign matter, and the foreign matter can be prevented from flowing into the control gas introduction path more reliably.
- the gas passage 52 is formed so as to extend once upward and then extend to the lower end 54, so that the foreign matter is less likely to reach the lower end 54 and further the capacity control valve. It is said that.
- variable capacity compressor is applicable to any compressor having a control gas introduction path to the capacity control valve, and is particularly suitable for a compressor used in a vehicle air conditioner. Is.
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Abstract
A variable capacity compressor provided with a mechanism which causes foreign matter to be less likely to enter a capacity control valve. The mechanism is achieved with simple modification to the compressor and without increasing the production cost, the size, and the weight of the compressor.
A compressor configured such that the stroke of a piston is changed by adjusting the pressure in a crank chamber by supplying refrigerant gas in a discharge chamber to the crank chamber through a capacity control valve and a gas supply path, wherein a gas path for introducing the refrigerant gas in the discharge chamber to the capacity control valve side is formed between any of a discharge valve forming member, a valve plate, and a gasket which is located between a cylinder head and a cylinder block. Also, an opening connecting to the inside of the discharge chamber is provided in one end of the gas path, and the other end of the gas path is connected to the inflow opening of a control gas introducing path formed in the cylinder head and directly connecting to the capacity control valve. Thus, a control gas introducing route leading from the discharge chamber to the capacity control valve is formed by the gas path and the gas introducing path, and an opening of the gas path, the opening being open to the inside of the discharge chamber, can be set to a desired upper position.
Description
本発明は、可変容量圧縮機に関し、とくに、容量制御弁への異物の流入を防止できるようにした可変容量圧縮機に関する。
The present invention relates to a variable displacement compressor, and more particularly to a variable displacement compressor that can prevent foreign matter from flowing into a displacement control valve.
容量制御弁を備え、該容量制御弁とガス供給通路を介してシリンダヘッド内に形成された吐出室内の冷媒ガスをクランク室に供給するとともに、クランク室からのガス排出通路を介してクランク室の冷媒ガスをシリンダヘッド内に形成された吸入室側に排出することにより、クランク室内の圧力を調節し、その調圧によってシリンダブロックのシリンダボア内に往復動自在に挿入されたピストンのストロークを可変制御するようにした可変容量圧縮機は、よく知られている。このような可変容量圧縮機においては、吐出室内の冷媒ガスをクランク室に供給されるに際し、経路途中で容量制御弁によりガス圧やガス流量が調節されることになるが、容量制御弁に冷媒ガスを流入させる場合、容量制御弁に異物が流入しないように配慮する必要がある。つまり、容量制御用に設けられた通路に磨耗粉等の異物が流入すると、制御通路が塞がれたり、制御弁内部の弁体に噛み込まれたりすることにより、制御性が悪化したり、制御不能になるおそれががある。
A capacity control valve is provided, and the refrigerant gas in the discharge chamber formed in the cylinder head is supplied to the crank chamber via the capacity control valve and the gas supply passage, and the crank chamber is supplied via the gas discharge passage from the crank chamber. By discharging the refrigerant gas to the suction chamber side formed in the cylinder head, the pressure in the crank chamber is adjusted, and the stroke of the piston inserted in the cylinder bore of the cylinder block is variably controlled by adjusting the pressure. Such variable capacity compressors are well known. In such a variable capacity compressor, when the refrigerant gas in the discharge chamber is supplied to the crank chamber, the gas pressure and the gas flow rate are adjusted by the capacity control valve in the middle of the path. When injecting gas, it is necessary to consider that foreign matter does not flow into the capacity control valve. In other words, when foreign matter such as wear powder flows into the passage provided for capacity control, the control passage is blocked or bitten by the valve body inside the control valve, the controllability deteriorates, There is a risk of loss of control.
従来、このような問題に対して、容量制御弁に異物が流入しないように、容量制御弁への冷媒ガスの流入通路入口にフィルタを設置する構造(例えば、特許文献1)、あるいは、容量制御弁への流入通路をシリンダヘッド内に形成するに際し、流入通路の吐出室側からの入口を、異物が溜まり易い圧縮機底部側ではなく、シリンダヘッド内の比較的上部に位置させるようにした構造が知られている(例えば、特許文献2)。
特開2005-120972号公報
特開2007-332847号公報
Conventionally, with respect to such a problem, a structure in which a filter is installed at the inlet of the refrigerant gas inflow passage to the capacity control valve so that foreign matter does not flow into the capacity control valve (for example, Patent Document 1) or capacity control. When the inflow passage to the valve is formed in the cylinder head, the inlet from the discharge chamber side of the inflow passage is positioned not at the bottom of the compressor where foreign matter tends to accumulate, but at a relatively upper portion in the cylinder head Is known (for example, Patent Document 2).
JP 2005-120972 A JP 2007-332847 A
一般に、外部信号制御方式の可変容量圧縮機の場合、通常のレイアウトでは容量制御弁は圧縮機の下部側に設置されることが多く、容量制御弁に冷媒ガスを導入する通路およびその吐出室側への開口は、異物の溜まり易い圧縮機内底面の近くに配置されることが多い。そのため、異物の流入に起因する制御通路の閉塞や制御弁内部の弁体の作動不良のおそれを完全には払拭できない配置構造となっていることが多い。
In general, in the case of a variable capacity compressor of an external signal control system, in a normal layout, the capacity control valve is often installed on the lower side of the compressor, and a passage for introducing refrigerant gas into the capacity control valve and its discharge chamber side The opening is often located near the bottom surface of the compressor where foreign matter tends to accumulate. Therefore, in many cases, the arrangement structure is such that the possibility of blockage of the control passage and malfunction of the valve body inside the control valve due to the inflow of foreign matter cannot be completely eliminated.
上記特許文献1に記載の構造では、フィルタを設置したり、フィルタ固定のための構造を構成したりする必要があるので、圧縮機の内部構造の複雑化を招くとともに、フィルタ設置に伴う部品点数の増加のため、組み付け工数の増加、製造コストの増加を招くという問題がある。また、上記特許文献2に記載の構造では、容量制御弁に対してその上部側に吐出室からの冷媒ガスを導入する通路構造としているため、一般的な弁側面部に通路が接続される構造とは異なることとなって、容量制御弁の共通化が困難になるとともに、この冷媒ガス導入通路がシリンダヘッド内に特別な通路として形成されているため、シリンダヘッドの大型化、ひいては圧縮機の大型化、重量増加を招くという問題がある。
In the structure described in Patent Document 1, since it is necessary to install a filter or configure a structure for fixing the filter, the internal structure of the compressor is complicated, and the number of parts associated with the filter installation is increased. Therefore, there is a problem that an increase in assembly man-hours and an increase in manufacturing costs are caused. Moreover, in the structure of the said patent document 2, since it is set as the channel | path structure which introduce | transduces the refrigerant gas from a discharge chamber into the upper part side with respect to a capacity | capacitance control valve, the structure where a channel | path is connected to a general valve side surface part. Therefore, it is difficult to make the capacity control valve common, and the refrigerant gas introduction passage is formed as a special passage in the cylinder head. There is a problem of increasing the size and weight.
そこで本発明の課題は、上記のような問題点に着目し、製造コストの増加や圧縮機の大型化、重量増加を抑えつつ、簡単な改良にて、異物が容量制御弁に流入しにくい機構を備えた可変容量圧縮機を提供することにある。
Therefore, the object of the present invention is to pay attention to the above-mentioned problems and to prevent foreign matter from flowing into the capacity control valve with a simple improvement while suppressing an increase in manufacturing cost, an increase in size of the compressor, and an increase in weight. It is providing the variable capacity compressor provided with.
上記課題を解決するために、本発明に係る可変容量圧縮機は、容量制御弁とガス供給通路を介してシリンダヘッド内に形成された吐出室内の冷媒ガスをクランク室に供給するとともに、ガス排出通路を介して前記クランク室の冷媒ガスをシリンダヘッド内に形成された吸入室に排出して前記クランク室を調圧し、その調圧によってシリンダブロックのシリンダボア内に往復動自在に挿入されたピストンのストロークを可変制御する可変容量圧縮機において、シリンダヘッドとシリンダブロックとの間に介在されたガスケット、吐出弁形成部材、弁板のいずれかの部材間に吐出室内の冷媒ガスを容量制御弁側に向けて導入可能なガス通路を形成するとともに該ガス通路の一端に吐出室内への開口を設け、該ガス通路の他端を、シリンダヘッドに形成され容量制御弁に直接通じる容量制御弁へのガス導入路の流入口に接続することにより、吐出室から容量制御弁までの制御用ガス導入経路を、前記ガス通路と前記ガス導入路によって形成したことを特徴とするものからなる。
In order to solve the above problems, a variable capacity compressor according to the present invention supplies a refrigerant gas in a discharge chamber formed in a cylinder head to a crank chamber via a capacity control valve and a gas supply passage, and discharges a gas. The refrigerant gas in the crank chamber is discharged to a suction chamber formed in the cylinder head through a passage to regulate the crank chamber, and by the pressure regulation, the piston inserted into the cylinder bore of the cylinder block is reciprocally movable. In a variable capacity compressor that variably controls the stroke, the refrigerant gas in the discharge chamber is moved to the capacity control valve side between any of the gasket, discharge valve forming member, and valve plate interposed between the cylinder head and the cylinder block. A gas passage that can be introduced toward the discharge chamber is formed and an opening into the discharge chamber is provided at one end of the gas passage, and the other end of the gas passage is connected to the cylinder head. A gas introduction path for control from the discharge chamber to the capacity control valve is formed by the gas passage and the gas introduction path by connecting to the inlet of the gas introduction path to the capacity control valve that is formed and directly communicates with the capacity control valve. It consists of what is characterized by.
このような本発明に係る可変容量圧縮機においては、吐出室内の冷媒ガスを容量制御弁側に向けて導入するガス通路が、ガスケット、吐出弁形成部材、弁板のいずれかの部材間に他の部位とは隔成された通路として形成され、そのガス通路のガス流入側開口が、適切な位置にて吐出室内へ開口される。このガス通路の他端が、容量制御弁に直接通じるガス導入路の流入口に接続されて、該ガス通路とガス導入路とによって、吐出室から容量制御弁までの制御用ガス導入経路が他の部位とは隔成された専用の経路として形成される。上記ガス通路の形成箇所には特段の制約はないので、この制御用ガス導入経路の吐出室からの冷媒ガスの流入口、つまり上記ガス通路のガス流入側開口は、実質的に任意の位置に設定することが可能になり、ガス流入側開口を適切な位置に、とくに吐出室内の異物の溜まり易い底面側部位から離れた上部の位置に設定することにより、制御用ガス導入経路内への異物の流入を容易に防止することが可能になる。その結果、たとえ容量制御弁が圧縮機の下部側に設置される場合にあっても、容量制御弁に通じる通路や容量制御弁内への異物の流入が防止され、通路閉塞や容量制御弁の作動不良の発生が確実に防止される。そして、この構造では、上記ガス通路は、ガスケット、吐出弁形成部材、弁板のいずれかの部材間に形成されるので、基本的に、シリンダヘッドや圧縮機全体の大型化や重量増加を招くことはない。また、後述の実施形態にも示すように、このガス通路は上記いずれかの部材に所定形状の溝等を形成しておくだけで、ごく簡単に設けることができるので、基本的に部品点数の増加や組み付け工数の増加を招くこともなく、しかも、ごく安価に実施可能である。
In such a variable capacity compressor according to the present invention, a gas passage for introducing the refrigerant gas in the discharge chamber toward the capacity control valve side is provided between any one of the gasket, the discharge valve forming member, and the valve plate. The gas inflow side opening of the gas passage is opened into the discharge chamber at an appropriate position. The other end of the gas passage is connected to an inlet of a gas introduction path that directly communicates with the capacity control valve, and the gas passage and the gas introduction path provide another control gas introduction path from the discharge chamber to the capacity control valve. It is formed as a dedicated path that is separated from the site. Since there is no particular restriction on the location where the gas passage is formed, the refrigerant gas inflow port from the discharge chamber of the control gas introduction path, that is, the gas inflow side opening of the gas passage is substantially at an arbitrary position. By setting the gas inflow side opening at an appropriate position, particularly at the upper position away from the bottom surface side where foreign substances tend to accumulate in the discharge chamber, foreign substances into the control gas introduction path can be set. It is possible to easily prevent the inflow. As a result, even when the capacity control valve is installed on the lower side of the compressor, the inflow of foreign matter into the passage leading to the capacity control valve and the capacity control valve is prevented, and the passage blockage and the capacity control valve The occurrence of malfunction is reliably prevented. In this structure, the gas passage is formed between any one of the gasket, the discharge valve forming member, and the valve plate. Therefore, basically, the cylinder head and the compressor as a whole are increased in size and weight. There is nothing. In addition, as shown in the embodiments described later, this gas passage can be provided very simply by forming a groove or the like of a predetermined shape in any of the above members. It can be implemented at a very low cost without incurring an increase in the number of assembly steps or man-hours.
この本発明に係る可変容量圧縮機においては、上記ガス通路の吐出室内への開口が、吐出室の上部に配置されていることが好ましい。吐出室内の上部側は、底面側に比べてはるかに異物が溜まりにくいので、そこから制御用冷媒ガスを取り入れることにより、異物の流入をより容易に防止できる。
In the variable capacity compressor according to the present invention, it is preferable that the opening of the gas passage into the discharge chamber is arranged at the upper portion of the discharge chamber. The upper side in the discharge chamber is much less likely to accumulate foreign matter than the bottom side, and therefore the inflow of foreign matter can be more easily prevented by introducing the control refrigerant gas from there.
また、上記容量制御弁が、シリンダヘッドの下部側に設置され、該容量制御弁へのガス導入路の流入口に対し、該流入口に接続される上記ガス通路が上方に向けて延びている構造とすることも好ましい。すなわち、レイアウト上容量制御弁をシリンダヘッドの下部側に設置する必要がある場合にあっても、上方から下方に向けて延びるガス通路、その下端部に接続されるガス導入路を介して制御用冷媒ガスを容量制御弁へ供給することができるので、異物が流入し易い圧縮機内の底面側部位を容易に回避できるようになり、それだけ確実に異物の流入を防止できるようになる。
The capacity control valve is installed on the lower side of the cylinder head, and the gas passage connected to the inflow port extends upward with respect to the inflow port of the gas introduction path to the capacity control valve. A structure is also preferable. In other words, even when it is necessary to install a capacity control valve on the lower side of the cylinder head in terms of layout, the control valve is connected via a gas passage extending from the upper side to the lower side and a gas introduction path connected to the lower end thereof. Since the refrigerant gas can be supplied to the capacity control valve, it becomes possible to easily avoid the bottom side portion in the compressor where foreign substances are likely to flow in, and to prevent foreign substances from flowing in as much as possible.
また、上記ガス通路およびその吐出室内への開口が、複数形成されている構成を採用することもできる。このように構成すれば、容量制御弁に直接通じるガス導入路は一つであっても、そこに通じる制御用冷媒ガスを導入するための経路は複数形成されることになるので、たとえ一つのガス通路やその吐出室内への開口に詰まり等の不具合が生じたとしても、他のガス通路やその吐出室内への開口によって制御用冷媒ガスを導入するための経路が確保されることになり、容量制御弁による良好な容量制御が安定して維持されることになる。例えば、後述の実施形態にも示すように、上記ガス通路およびその吐出室内への開口が、2組形成されており、両ガス通路が互いに反対方向から上記ガス導入路の流入口に接続されている構成とすることができる。両ガス通路の吐出室内への開口を少し離れた位置に設定しておけば、両開口が同時に詰まる等のおそれも容易に回避できる。
It is also possible to adopt a configuration in which a plurality of the gas passages and openings into the discharge chamber are formed. With this configuration, even if there is only one gas introduction path that directly leads to the capacity control valve, a plurality of paths for introducing the control refrigerant gas that leads to the capacity control valve are formed. Even if a problem such as clogging occurs in the gas passage or the opening into the discharge chamber, a path for introducing the control refrigerant gas is secured by the other gas passage or the opening into the discharge chamber, Good capacity control by the capacity control valve is stably maintained. For example, as shown in the embodiments described later, two sets of the gas passage and its opening into the discharge chamber are formed, and both gas passages are connected to the inlet of the gas introduction passage from opposite directions. It can be set as a structure. If the openings into the discharge chambers of both gas passages are set at positions slightly apart, the possibility of both openings being clogged at the same time can be easily avoided.
また、上記ガス通路の吐出室内への開口は、複数の小孔から形成されている構成(例えば、メッシュ状の構成)とすることもできる。このように構成すれば、この開口部に一種のフィルタの役割を果たさせることが可能になり、異物の進入を阻止して、より確実に異物の流入を防止することができる。
Further, the opening of the gas passage into the discharge chamber may be configured by a plurality of small holes (for example, a mesh-shaped configuration). If comprised in this way, it will become possible to make this opening part play a role of a kind of filter, can prevent the entrance of a foreign material, and can prevent the inflow of a foreign material more reliably.
また、上記ガス通路の吐出室内への開口については、吐出室内に向けて拡開されている構造を採用することができる。このように構成すれば、制御用ガス導入経路の入口部で冷媒ガスの流入速度を遅くし、異物がガスから分離されてより流入しにくい構造とすることができる。とくに、拡開されたガス通路の吐出室内への開口を、吐出室内の下方に向けて形成しておけば、異物の自重を利用して異物を下方に落下させることも可能になり、一層異物が流入しにくい構造とすることができる。
In addition, the opening of the gas passage into the discharge chamber can employ a structure that is expanded toward the discharge chamber. If comprised in this way, it can be set as the structure where the inflow speed of refrigerant | coolant gas is slowed in the inlet part of the control gas introduction path | route, and a foreign material is isolate | separated from gas and it is hard to flow in. In particular, if the opening to the discharge chamber of the expanded gas passage is formed downward in the discharge chamber, it is possible to drop the foreign material downward using its own weight. It is possible to make the structure difficult to flow in.
このような本発明に係る可変容量圧縮機の構造は、容量制御弁への制御用ガス導入経路を備えたあらゆる圧縮機に適用可能であり、とくに、高い耐久性、長期間安定した性能、低コストでの実施が要求される、車両用空調装置に用いられる圧縮機に好適なものである。
Such a structure of the variable capacity compressor according to the present invention can be applied to any compressor having a control gas introduction path to the capacity control valve, and particularly has high durability, long-term stable performance, low It is suitable for a compressor used in a vehicle air conditioner that is required to be implemented at a low cost.
このように、本発明に係る可変容量圧縮機によれば、ガス流入口となる吐出室側開口の位置を実質的に任意に設定可能なガス通路と該ガス通路に接続されるガス導入路とによって、吐出室から容量制御弁までの制御用ガス導入経路を構成できるようにしたので、吐出室からのガス流入口を容易に異物の流入しにくい上部側の位置に設定でき、実質的に部品点数の増加を伴わず、大型化や重量増加も伴わない簡単で安価な改良にて、容量制御弁やそれに通じる通路への異物の流入を確実に防止できる。その結果、長期間にわたって安定した所望の容量制御を行うことが可能になる。
As described above, according to the variable capacity compressor according to the present invention, the gas passage capable of setting the position of the discharge chamber side opening serving as the gas inflow port substantially arbitrarily and the gas introduction passage connected to the gas passage are provided. Since the control gas introduction path from the discharge chamber to the capacity control valve can be configured, the gas inlet from the discharge chamber can be easily set at the upper position where foreign substances do not easily flow in, and the parts can be substantially A simple and inexpensive improvement without increasing the number of points and without increasing the size and weight can reliably prevent foreign substances from flowing into the capacity control valve and the passage leading to it. As a result, desired capacity control can be performed stably over a long period of time.
以下に、本発明の望ましい実施の形態について、図面を参照して説明する。
図1~図5は、本発明の一実施態様に係る可変容量圧縮機を示しており、例えば、車両用空調装置の冷凍回路等に好適に用いられる可変容量圧縮機を示している。図1において、可変容量圧縮機1は、シリンダブロック2と、その両側に設けられたシリンダヘッド3、クランクケース4(フロントハウジング)を有しており、シリンダブロック2内には複数のシリンダボア5が形成され、各シリンダボア5内には往復動自在にピストン6が挿入されている。クランクケース4内にはクランク室7が形成されており、クランク室7内には傾斜角可変の斜板8が、ロータ9、ヒンジ機構10を介して駆動軸11と一体的に回転可能に設けられている。斜板8の外周部両面には、ピストン6の一端部側に保持された一対のシュー12が摺接されており、この摺接を介して斜板6の回転運動がピストン6の往復動に変換されるとともに、斜板6の傾斜角に応じてピストン6の往復動のストロークが可変制御できるようになっている。斜板6の傾斜角は下記のクランク室7の調圧によって調節され、それによってピストン6のストロークが可変制御できるようになっている。 Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings.
1 to 5 show a variable capacity compressor according to an embodiment of the present invention, for example, a variable capacity compressor suitably used for a refrigeration circuit of a vehicle air conditioner or the like. In FIG. 1, avariable capacity compressor 1 has a cylinder block 2, a cylinder head 3 provided on both sides thereof, and a crankcase 4 (front housing). A plurality of cylinder bores 5 are provided in the cylinder block 2. A piston 6 is inserted into each cylinder bore 5 so as to reciprocate. A crank chamber 7 is formed in the crankcase 4, and a swash plate 8 having a variable inclination angle is provided in the crank chamber 7 so as to be rotatable integrally with the drive shaft 11 via a rotor 9 and a hinge mechanism 10. It has been. A pair of shoes 12 held on one end side of the piston 6 are slidably contacted with both surfaces of the outer peripheral portion of the swash plate 8, and the rotational movement of the swash plate 6 is caused to reciprocate the piston 6 through the sliding contact. While being converted, the stroke of the reciprocating motion of the piston 6 can be variably controlled according to the inclination angle of the swash plate 6. The inclination angle of the swash plate 6 is adjusted by adjusting the pressure of the crank chamber 7 described below, whereby the stroke of the piston 6 can be variably controlled.
図1~図5は、本発明の一実施態様に係る可変容量圧縮機を示しており、例えば、車両用空調装置の冷凍回路等に好適に用いられる可変容量圧縮機を示している。図1において、可変容量圧縮機1は、シリンダブロック2と、その両側に設けられたシリンダヘッド3、クランクケース4(フロントハウジング)を有しており、シリンダブロック2内には複数のシリンダボア5が形成され、各シリンダボア5内には往復動自在にピストン6が挿入されている。クランクケース4内にはクランク室7が形成されており、クランク室7内には傾斜角可変の斜板8が、ロータ9、ヒンジ機構10を介して駆動軸11と一体的に回転可能に設けられている。斜板8の外周部両面には、ピストン6の一端部側に保持された一対のシュー12が摺接されており、この摺接を介して斜板6の回転運動がピストン6の往復動に変換されるとともに、斜板6の傾斜角に応じてピストン6の往復動のストロークが可変制御できるようになっている。斜板6の傾斜角は下記のクランク室7の調圧によって調節され、それによってピストン6のストロークが可変制御できるようになっている。 Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings.
1 to 5 show a variable capacity compressor according to an embodiment of the present invention, for example, a variable capacity compressor suitably used for a refrigeration circuit of a vehicle air conditioner or the like. In FIG. 1, a
シリンダヘッド3内には、吸入室13と、該吸入室13の周囲の吐出室14とが形成されており、シリンダヘッド3の下部側に、外部信号に基づき、上記クランク室7の圧力を調圧し、それを介して圧縮機1の容量を制御する容量制御弁15が設けられている。シリンダヘッド3とシリンダブロック2との間には、シリンダヘッド3側から、ガスケット16(吐出弁の開度規制のためのリテーナ機能を備えたリテーナ一体型ガスケット)、吐出弁形成部材17、弁板18が介在されており、これらの部材は、シリンダヘッド3、シリンダブロック2、クランクケース4とともに、通しボルト19によって所定の位置関係に固定、締結されている。弁板19には、オリフィス20が設けられており、オリフィス20は、クランク室7の冷媒ガスを吸入室13に排出するガス排出通路21の一部を形成している。クランク室7の調圧は、容量制御弁15とガス供給通路22を介して吐出室14内の冷媒ガスをクランク室7に供給するとともに、ガス排出通路21を介してクランク室7の冷媒ガスを吸入室13へと排出することによって行われる。このクランク室7の調圧によって、上述の如く、ピストン6のストロークが可変制御される。
A suction chamber 13 and a discharge chamber 14 around the suction chamber 13 are formed in the cylinder head 3, and the pressure in the crank chamber 7 is adjusted on the lower side of the cylinder head 3 based on an external signal. A capacity control valve 15 is provided for controlling the capacity of the compressor 1 through the pressure. Between the cylinder head 3 and the cylinder block 2, from the cylinder head 3 side, a gasket 16 (a retainer-integrated gasket having a retainer function for restricting the opening of the discharge valve), a discharge valve forming member 17, a valve plate 18 are interposed, and these members, together with the cylinder head 3, the cylinder block 2, and the crankcase 4, are fixed and fastened in a predetermined positional relationship by a through bolt 19. The valve plate 19 is provided with an orifice 20, and the orifice 20 forms a part of a gas discharge passage 21 for discharging the refrigerant gas in the crank chamber 7 to the suction chamber 13. The crank chamber 7 is regulated by supplying the refrigerant gas in the discharge chamber 14 to the crank chamber 7 via the capacity control valve 15 and the gas supply passage 22 and supplying the refrigerant gas in the crank chamber 7 via the gas discharge passage 21. This is done by discharging to the suction chamber 13. By adjusting the pressure of the crank chamber 7, the stroke of the piston 6 is variably controlled as described above.
上記ガス供給通路22のうち、吐出室14から容量制御弁15までの制御用ガス導入経路23は、ガス通路24と、該ガス通路24に接続され、容量制御弁15に直接通じる容量制御弁15へのガス導入路25とによって形成されている。ガス通路24は、その一端(上端)に、吐出室14内への開口26を有しており、他端(下端)27が、図2に示すように形成されたガス導入路25の流入口28に接続されている。この接続のため、ガス導入路25の流入口28は、シリンダヘッド3の端面と実質的に面一の位置に設定されている。これらガス通路24とガス導入路25の接続によって、他の部位とは隔成された、吐出室14から容量制御弁15に制御用ガスを導くための専用の制御用ガス導入経路23が形成されている。
Of the gas supply passage 22, a control gas introduction passage 23 from the discharge chamber 14 to the capacity control valve 15 is connected to the gas passage 24 and the gas passage 24, and directly communicates with the capacity control valve 15. And a gas introduction path 25 to the surface. The gas passage 24 has an opening 26 into the discharge chamber 14 at one end (upper end), and the other end (lower end) 27 is an inlet of the gas introduction path 25 formed as shown in FIG. 28. For this connection, the inlet 28 of the gas introduction path 25 is set at a position substantially flush with the end face of the cylinder head 3. By connecting the gas passage 24 and the gas introduction path 25, a dedicated control gas introduction path 23 for guiding the control gas from the discharge chamber 14 to the capacity control valve 15 is formed, which is separated from other parts. ing.
この制御用ガス導入経路23のガス通路24は、本実施態様では、図3、図4(A)、図5に示すように形成されている。図3に示すように、弁板18に溝を刻設することによってガス通路24が形成されており、本実施態様では、複数のガス通路24、とくに、互いに連通し半円状に延びる2本のガス通路24a、24bが設けられている。これらガス通路24a、24bの吐出室14への各開口26a、26bは少し離れた位置に設定されている。また、これらガス通路24a、24bは共通の下端27を有し、前述の如く、ガス導入路25の流入口28へと接続されている。吐出弁形成部材17、ガスケット16にも、それぞれ、吐出室14からのガス導入のために、上記各開口26a、26bに対応する開口29a、29bと開口30a、30bと、上記下端27に対応する位置に、ガス導入路25の流入口28への連通孔31、32が設けられている。なお、本実施態様では、図4(A)に模式的に示すように、弁板18に溝を刻設することによってガス通路24を形成したが、図4(B)に示すように、弁板18には加工を加えずに、吐出弁形成部材17に溝を刻設して弁板18とガスケット16との間にガス通路24を形成してもよく、また、図4(C)に示すように、弁板18と吐出弁形成部材17には加工を加えずに、ガスケット16側にガス通路24を形成するようにしてもよい。図5は、図3に示した形態にて形成されたガス通路24を、各部材の組立状態における透視図として表している。
In this embodiment, the gas passage 24 of the control gas introduction passage 23 is formed as shown in FIG. 3, FIG. 4 (A), and FIG. As shown in FIG. 3, a gas passage 24 is formed by carving a groove in the valve plate 18, and in this embodiment, a plurality of gas passages 24, particularly, two communicating with each other and extending in a semicircular shape. Gas passages 24a and 24b are provided. Each opening 26a, 26b to the discharge chamber 14 of these gas passages 24a, 24b is set at a position slightly apart. These gas passages 24a and 24b have a common lower end 27 and are connected to the inlet 28 of the gas introduction path 25 as described above. The discharge valve forming member 17 and the gasket 16 also correspond to the openings 29a and 29b and the openings 30a and 30b corresponding to the openings 26a and 26b and the lower end 27 for introducing gas from the discharge chamber 14, respectively. At positions, communication holes 31 and 32 to the inlet 28 of the gas introduction path 25 are provided. In this embodiment, as schematically shown in FIG. 4A, the gas passage 24 is formed by engraving a groove in the valve plate 18, but as shown in FIG. Without processing the plate 18, a groove may be formed in the discharge valve forming member 17 to form a gas passage 24 between the valve plate 18 and the gasket 16, as shown in FIG. As shown, the gas passage 24 may be formed on the gasket 16 side without processing the valve plate 18 and the discharge valve forming member 17. FIG. 5 shows the gas passage 24 formed in the form shown in FIG. 3 as a perspective view in an assembled state of each member.
このように構成された本実施態様に係る可変容量圧縮機1においては、吐出室14内の冷媒ガスが、図1、図5の矢印Aで示すように、開口26(26a、26b)からガス通路24(24a、24b)内に導入され、ガス通路24(24a、24b)を流れた後、ガス通路24の下端27から流入口28を経てガス導入路25を通して容量制御弁15へと供給され、容量制御弁15で流量や圧力が制御された後、図1の矢印Bで示すように、クランク室7へと供給される。この矢印A、矢印Bで示した経路が、クランク室7へのガス供給通路22を形成している。とくに、容量制御弁15までの制御用ガス導入経路23のうちのガス通路24が、本実施態様では弁板18に刻設された溝によって形成され、それが吐出弁形成部材17で覆われて通路途中がシールされた状態に構成されているので、ガス通路24の吐出室14側の開口26は実質的に任意の位置に設定可能である。この開口26の位置を、図1に示したように、吐出室14側に対して吐出室14内の異物の溜まり易い底面側部位から離れた上部側の位置に設定することにより、制御用ガス導入経路23内、さらには容量制御弁15内への異物の流入を容易に防止することが可能になる。とくに、図5に示したように、開口26a、26bを少し離れた位置にて2箇所設定し、そこから左右両側のガス通路24a、24bを介してガス導入路25の流入口28に至るように構成すれば、万一開口26a、26bのいずれか一方、あるいはガス通路24a、24bのいずれか一方に異物流入による不具合が生じたとしても、他方の開口とガス通路によって容量制御弁15までの制御用ガス導入経路23が確保されることになり、容量制御に関する不具合の発生は防止される。
In the variable capacity compressor 1 according to this embodiment configured as described above, the refrigerant gas in the discharge chamber 14 is gas from the opening 26 (26a, 26b) as shown by an arrow A in FIGS. After being introduced into the passage 24 (24a, 24b) and flowing through the gas passage 24 (24a, 24b), it is supplied from the lower end 27 of the gas passage 24 through the inlet 28 to the capacity control valve 15 through the gas introduction passage 25. After the flow rate and pressure are controlled by the capacity control valve 15, as shown by the arrow B in FIG. 1, it is supplied to the crank chamber 7. The paths indicated by arrows A and B form a gas supply passage 22 to the crank chamber 7. In particular, the gas passage 24 of the control gas introduction passage 23 to the capacity control valve 15 is formed by a groove formed in the valve plate 18 in this embodiment, and is covered with the discharge valve forming member 17. Since the middle of the passage is configured to be sealed, the opening 26 on the discharge chamber 14 side of the gas passage 24 can be set at a substantially arbitrary position. As shown in FIG. 1, the position of the opening 26 is set to a position on the upper side away from the bottom side portion where the foreign matter in the discharge chamber 14 is likely to accumulate with respect to the discharge chamber 14 side. It is possible to easily prevent foreign substances from flowing into the introduction path 23 and further into the capacity control valve 15. In particular, as shown in FIG. 5, two openings 26a and 26b are set at positions slightly apart from each other so as to reach the inlet 28 of the gas introduction passage 25 from the left and right gas passages 24a and 24b. If any of the openings 26a and 26b or the gas passages 24a and 24b has a problem due to the inflow of foreign matter, the other opening and the gas passage lead to the capacity control valve 15. As a result, the control gas introduction path 23 is secured, and the occurrence of problems related to capacity control is prevented.
また、上記のように制御用ガス導入経路23内、さらには容量制御弁15内への異物の流入防止を可能ならしめるガス通路24は、ガスケット16、吐出弁形成部材17、弁板18のいずれかの部材間に溝形成等により他の部位とは隔成された通路として形成されればよく、このようなガス通路24の形成は、基本的に部品点数の増加や、重量増加、圧縮機の大型化を伴わずに安価に実施可能である。したがって、本発明の課題である、製造コストの増加や圧縮機の大型化、重量増加を抑えつつ、簡単な改良にて、異物が容量制御弁に流入しにくい機構を備えた可変容量圧縮機を提供することが、確実に実現されることになる。
Further, as described above, the gas passage 24 that can prevent the inflow of foreign matter into the control gas introduction path 23 and further into the capacity control valve 15 is any of the gasket 16, the discharge valve forming member 17, and the valve plate 18. The gas passage 24 may be formed as a passage separated from other parts by forming a groove between the members. The formation of the gas passage 24 basically increases the number of parts, increases the weight, and compresses the compressor. It can be implemented at a low cost without increasing the size. Therefore, a variable capacity compressor having a mechanism in which foreign matter does not easily flow into the capacity control valve with a simple improvement while suppressing an increase in manufacturing cost, an increase in size of the compressor, and an increase in weight, which are the problems of the present invention. Providing is surely realized.
本発明では、上記実施態様に係る可変容量圧縮機1に比べ、各種の変形例を採用することが可能である。例えば図6に示すように、上記ガス通路24の吐出室14側入口、例えばガスケット41の開口42を、複数の小孔43を有する開口42に構成することが可能である。このような構成においては、この開口42部に一種のフィルタの機能を持たせることが可能になり、ガス通路24内への異物の進入をより確実に阻止することが可能になる。
In the present invention, various modifications can be adopted as compared with the variable capacity compressor 1 according to the above embodiment. For example, as shown in FIG. 6, the discharge chamber 14 side inlet of the gas passage 24, for example, the opening 42 of the gasket 41, can be configured as an opening 42 having a plurality of small holes 43. In such a configuration, it becomes possible to give this opening 42 a function of a kind of filter, and it is possible to more reliably prevent foreign matter from entering the gas passage 24.
また、例えば図7に示すように、弁板51に溝刻設により形成するガス通路52のガス流入側開口53を、吐出室14側に向けて大きく拡開して形成する構造を採用することができる。このように構成すれば、制御用ガス導入経路の入口部での冷媒ガスの流入速度を低下させることができ、流入時にたとえ異物が混入していたとしても、その異物を流入ガスから分離させることが可能になり、異物が制御用ガス導入経路により流入しにくい構造とすることができる。また、図示例では、拡開されたガス通路52の吐出室14内への開口53が、吐出室14の下方に向けて開口するように形成されているので、異物が存在する場合にはその異物の自重を利用して異物を下方に落下させることが可能になり、一層確実に異物の制御用ガス導入経路への流入を防止できるようになっている。さらに、図示例では、ガス通路52は、一旦上方へ向かって延びた後、下端54まで延びるように形成されているので、異物は、さらに一層下端54、さらには容量制御弁へと至りにくい構造とされている。
Further, for example, as shown in FIG. 7, a structure is adopted in which the gas inflow side opening 53 of the gas passage 52 formed by engraving the valve plate 51 is greatly expanded toward the discharge chamber 14 side. Can do. If comprised in this way, the inflow speed of the refrigerant gas at the inlet of the control gas introduction path can be reduced, and even if foreign matter is mixed in at the time of inflow, the foreign matter can be separated from the inflow gas. Therefore, a structure in which foreign matter is less likely to flow in through the control gas introduction path can be obtained. In the illustrated example, the opening 53 into the discharge chamber 14 of the expanded gas passage 52 is formed so as to open toward the lower side of the discharge chamber 14. The foreign matter can be dropped downward by utilizing the dead weight of the foreign matter, and the foreign matter can be prevented from flowing into the control gas introduction path more reliably. Further, in the illustrated example, the gas passage 52 is formed so as to extend once upward and then extend to the lower end 54, so that the foreign matter is less likely to reach the lower end 54 and further the capacity control valve. It is said that.
本発明に係る可変容量圧縮機の構造は、容量制御弁への制御用ガス導入経路を備えたあらゆる圧縮機に適用可能であり、とくに、車両用空調装置に用いられる圧縮機に用いて好適なものである。
The structure of the variable capacity compressor according to the present invention is applicable to any compressor having a control gas introduction path to the capacity control valve, and is particularly suitable for a compressor used in a vehicle air conditioner. Is.
1 可変容量圧縮機
2 シリンダブロック
3 シリンダヘッド
4 クランクケース
5 シリンダボア
6 ピストン
7 クランク室
8 斜板
9 ロータ
10 ヒンジ機構
11 駆動軸
12 シュー
13 吸入室
14 吐出室
15 容量制御弁
16 ガスケット
17 吐出弁形成部材
18 弁板
19 通しボルト
20 オリフィス
21 ガス排出通路
22 ガス供給通路
23 制御用ガス導入経路
24、24a、24b ガス通路
25 ガス導入路
26、26a、26b 開口
27 下端
28 流入口
29a、29b、30a、30b 開口
31、32 連通孔
41 ガスケット
42 開口
43 小孔
51 弁板
52 ガス通路
53 開口
54 下端 DESCRIPTION OFSYMBOLS 1 Variable capacity compressor 2 Cylinder block 3 Cylinder head 4 Crankcase 5 Cylinder bore 6 Piston 7 Crank chamber 8 Swash plate 9 Rotor 10 Hinge mechanism 11 Drive shaft 12 Shoe 13 Suction chamber 14 Discharge chamber 15 Capacity control valve 16 Gasket 17 Discharge valve formation Member 18 Valve plate 19 Through bolt 20 Orifice 21 Gas discharge passage 22 Gas supply passage 23 Control gas introduction passage 24, 24a, 24b Gas passage 25 Gas introduction passage 26, 26a, 26b Opening 27 Lower end 28 Inlet 29a, 29b, 30a 30b Opening 31, 32 Communication hole 41 Gasket 42 Opening 43 Small hole 51 Valve plate 52 Gas passage 53 Opening 54 Lower end
2 シリンダブロック
3 シリンダヘッド
4 クランクケース
5 シリンダボア
6 ピストン
7 クランク室
8 斜板
9 ロータ
10 ヒンジ機構
11 駆動軸
12 シュー
13 吸入室
14 吐出室
15 容量制御弁
16 ガスケット
17 吐出弁形成部材
18 弁板
19 通しボルト
20 オリフィス
21 ガス排出通路
22 ガス供給通路
23 制御用ガス導入経路
24、24a、24b ガス通路
25 ガス導入路
26、26a、26b 開口
27 下端
28 流入口
29a、29b、30a、30b 開口
31、32 連通孔
41 ガスケット
42 開口
43 小孔
51 弁板
52 ガス通路
53 開口
54 下端 DESCRIPTION OF
Claims (9)
- 容量制御弁とガス供給通路を介してシリンダヘッド内に形成された吐出室内の冷媒ガスをクランク室に供給するとともに、ガス排出通路を介して前記クランク室の冷媒ガスをシリンダヘッド内に形成された吸入室に排出して前記クランク室を調圧し、その調圧によってシリンダブロックのシリンダボア内に往復動自在に挿入されたピストンのストロークを可変制御する可変容量圧縮機において、シリンダヘッドとシリンダブロックとの間に介在されたガスケット、吐出弁形成部材、弁板のいずれかの部材間に吐出室内の冷媒ガスを容量制御弁側に向けて導入可能なガス通路を形成するとともに該ガス通路の一端に吐出室内への開口を設け、該ガス通路の他端を、シリンダヘッドに形成され容量制御弁に直接通じる容量制御弁へのガス導入路の流入口に接続することにより、吐出室から容量制御弁までの制御用ガス導入経路を、前記ガス通路と前記ガス導入路によって形成したことを特徴とする可変容量圧縮機。 The refrigerant gas in the discharge chamber formed in the cylinder head through the capacity control valve and the gas supply passage is supplied to the crank chamber, and the refrigerant gas in the crank chamber is formed in the cylinder head through the gas discharge passage. In a variable capacity compressor that discharges to a suction chamber and regulates the crank chamber, and variably controls the stroke of a piston that is reciprocally inserted into the cylinder bore of the cylinder block by the pressure regulation, the cylinder head and the cylinder block A gas passage through which refrigerant gas in the discharge chamber can be introduced toward the capacity control valve side is formed between any of the gasket, discharge valve forming member, and valve plate interposed therebetween, and discharged to one end of the gas passage. A gas introduction path to a capacity control valve which is provided with an opening to the room and the other end of the gas path is formed in the cylinder head and directly communicates with the capacity control valve By connecting the inflow port, the variable displacement compressor, characterized in that the control gas introduction path from the discharge chamber to the control valve, formed by the gas introducing passage and the gas passage.
- 前記ガス通路の吐出室内への開口が、吐出室の上部に配置されている、請求項1に記載の可変容量圧縮機。 The variable capacity compressor according to claim 1, wherein an opening of the gas passage into the discharge chamber is disposed at an upper portion of the discharge chamber.
- 前記容量制御弁が、シリンダヘッドの下部側に設置され、該容量制御弁へのガス導入路の流入口に対し、該流入口に接続される前記ガス通路が上方に向けて延びている、請求項1または2に記載の可変容量圧縮機。 The capacity control valve is installed on a lower side of the cylinder head, and the gas passage connected to the inflow port extends upward with respect to the inflow port of the gas introduction path to the capacity control valve. Item 3. The variable capacity compressor according to Item 1 or 2.
- 前記ガス通路およびその吐出室内への開口が、複数形成されている、請求項1~3のいずれかに記載の可変容量圧縮機。 The variable capacity compressor according to any one of claims 1 to 3, wherein a plurality of openings to the gas passage and its discharge chamber are formed.
- 前記ガス通路およびその吐出室内への開口が、2組形成されており、両ガス通路が互いに反対方向から前記ガス導入路の流入口に接続されている、請求項4に記載の可変容量圧縮機。 5. The variable capacity compressor according to claim 4, wherein two sets of the gas passage and its opening into the discharge chamber are formed, and both gas passages are connected to the inlet of the gas introduction passage from opposite directions to each other. .
- 前記ガス通路の吐出室内への開口が、複数の小孔から形成されている、請求項1~5のいずれかに記載の可変容量圧縮機。 The variable capacity compressor according to any one of claims 1 to 5, wherein the opening of the gas passage into the discharge chamber is formed of a plurality of small holes.
- 前記ガス通路の吐出室内への開口が、吐出室内に向けて拡開されている、請求項1~6のいずれかに記載の可変容量圧縮機。 The variable capacity compressor according to any one of claims 1 to 6, wherein an opening of the gas passage into the discharge chamber is expanded toward the discharge chamber.
- 前記拡開されたガス通路の吐出室内への開口が、吐出室内の下方に向けて形成されている、請求項7に記載の可変容量圧縮機。 The variable capacity compressor according to claim 7, wherein the opening of the expanded gas passage into the discharge chamber is formed downward in the discharge chamber.
- 車両用空調装置に用いられる圧縮機からなる、請求項1~8のいずれかに記載の可変容量圧縮機。 The variable capacity compressor according to any one of claims 1 to 8, comprising a compressor used in a vehicle air conditioner.
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Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0694311A (en) * | 1992-09-11 | 1994-04-05 | Toshiba Corp | Refrigerating cycle |
JPH10281060A (en) * | 1996-12-10 | 1998-10-20 | Toyota Autom Loom Works Ltd | Variable displacement compressor |
JPH11324910A (en) * | 1998-05-15 | 1999-11-26 | Toyota Autom Loom Works Ltd | Variable capacity compressor |
JP2001300345A (en) * | 2000-04-21 | 2001-10-30 | Kenzo Takahashi | Air separation device combined with magnetic separation |
JP2002070745A (en) * | 2000-06-13 | 2002-03-08 | Toyota Industries Corp | Compressor |
JP2007332847A (en) * | 2006-06-14 | 2007-12-27 | Toyota Industries Corp | Variable displacement compressor |
-
2008
- 2008-11-18 JP JP2008294312A patent/JP2010121487A/en active Pending
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2009
- 2009-11-18 WO PCT/JP2009/006186 patent/WO2010058563A1/en active Application Filing
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
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JPH0694311A (en) * | 1992-09-11 | 1994-04-05 | Toshiba Corp | Refrigerating cycle |
JPH10281060A (en) * | 1996-12-10 | 1998-10-20 | Toyota Autom Loom Works Ltd | Variable displacement compressor |
JPH11324910A (en) * | 1998-05-15 | 1999-11-26 | Toyota Autom Loom Works Ltd | Variable capacity compressor |
JP2001300345A (en) * | 2000-04-21 | 2001-10-30 | Kenzo Takahashi | Air separation device combined with magnetic separation |
JP2002070745A (en) * | 2000-06-13 | 2002-03-08 | Toyota Industries Corp | Compressor |
JP2007332847A (en) * | 2006-06-14 | 2007-12-27 | Toyota Industries Corp | Variable displacement compressor |
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