KR20120024858A - Heat pump device, compressor with injection mechanism, and method of manufacturing scroll compressor with injection mechanism - Google Patents

Abstract

It is an object to prevent the refrigerant during compression from flowing out into the injection circuit. The compressor forms a compression chamber 20, and the compression section 1, 2 for compressing the suction refrigerant of the suction pressure sucked into the compression chamber 20 to the discharge pressure, and in the compression chamber 20, the suction refrigerant is A refrigerant injection portion for injecting the injection refrigerant into the intermediate pressure portion which is higher than the suction pressure and becomes lower than the discharge pressure is provided. The refrigerant injection unit 1f opens and closes the valve inlet chamber 1f connected to the refrigerant inlet chamber 1e through which the injection refrigerant flows from the injection circuit through the injection pipe 41 and the intermediate pressure portion of the refrigerant inlet chamber 1e and the compression chamber 20. ), A connection port between the refrigerant inlet chamber 1e and an intermediate pressure section is formed in the same plane in the chamber, and the refrigerant is caused by a pressure difference between the refrigerant on the refrigerant inlet chamber 1e side and the refrigerant on the intermediate pressure section side. The on-off valve chamber provided with the on-off valve 30 which opens and closes a connection port with the inflow chamber 1e is provided.

Description

Heat pump device, injection compressor and injection scroll manufacturing method {HEAT PUMP DEVICE, COMPRESSOR WITH INJECTION MECHANISM, AND METHOD OF MANUFACTURING SCROLL COMPRESSOR WITH INJECTION MECHANISM}

The present invention relates to, for example, a heat pump apparatus having an injection circuit, and an injection-compatible compressor having an injection mechanism. Moreover, this invention relates to the manufacturing method of the scroll compressor which has an injection mechanism.

There is a compressor having an injection mechanism for supplying a high pressure refrigerant from the condenser to the compression chamber through an injection circuit (see Patent Document 1).

[Patent Document]

Patent Document 1: Japanese Patent Application Laid-Open No. 2006-112708

In a scroll compressor having an injection mechanism, when the valve of the injection circuit (the third expansion valve 14 shown in FIG. 1 in Patent Document 1) is closed and the injection operation is not performed, the refrigerant during compression in the compression chamber is injected. It flows out to the circuit side. In other words, when no injection operation is performed, the injection circuit becomes a dead volume in the compression process, leading to a decrease in compression efficiency.

Further, even when the pressure in the compression chamber is excessively higher than the pressure of the refrigerant exiting the condenser, the refrigerant in the middle of being compressed in the compression chamber flows out to the condenser side.

An object of the present invention is to prevent, for example, the refrigerant during compression in the compression chamber from flowing out to the injection circuit side.

The heat pump apparatus according to the present invention is, for example,

A main refrigerant circuit in which a compressor, a radiator, a first expansion valve, and an evaporator are sequentially connected;

An injection circuit provided between the radiator of the main refrigerant circuit and the first expansion valve, the injection pipe provided in the compressor, and provided with a second expansion valve;

If the opening degree of the second expansion valve decreases, the flow path from the injection pipe of the compressor to the compression chamber is closed; if the opening degree of the second expansion valve increases, the flow path from the injection pipe of the compressor to the compression chamber It is characterized by providing a mechanism for opening the.

The mechanism is characterized by operating with a pressure difference between the refrigerant flowing through the main refrigerant circuit and the refrigerant flowing through the injection circuit.

The apparatus,

A coolant inlet chamber provided in the middle of the flow path and into which a coolant flows from the injection circuit through the injection pipe;

An opening / closing valve chamber provided between the coolant inlet chamber and the compression chamber in the flow path and connected to the coolant inlet chamber and the compression chamber, wherein a connection port of the refrigerant inlet chamber and a connection port of the compression chamber are formed in the same surface of the chamber, And an on / off valve chamber provided with an on / off valve for opening and closing a connection port with the refrigerant inlet chamber due to a pressure difference between the refrigerant on the refrigerant inlet chamber side and the refrigerant on the compression chamber side.

The injection-adaptive compressor according to the present invention is, for example,

A compression unit which forms a compression chamber and compresses the suction refrigerant having the suction pressure sucked into the compression chamber to the discharge pressure;

In the compression chamber formed by the compression section, provided with a refrigerant injection unit for injecting the injection refrigerant into the intermediate pressure portion, the suction refrigerant is an intermediate pressure higher than the suction pressure and lower than the discharge pressure,

The refrigerant injection unit,

A refrigerant inflow chamber into which the injection refrigerant flows from the outside;

An open / close valve chamber connected to the refrigerant inlet chamber and the intermediate pressure portion of the compression chamber, wherein a connection port between the refrigerant inlet chamber and a connection port between the intermediate pressure portion is formed in the same surface in the chamber, and the refrigerant on the refrigerant inlet chamber side and the intermediate pressure portion are formed. And an on / off valve chamber provided with an on / off valve for opening and closing a connection port with the coolant inflow chamber due to a pressure difference between the coolant on the side.

The on-off valve is a plate-shaped member provided to be movable in the on-off valve chamber in a predetermined direction of movement. When the connection port with the refrigerant inlet chamber is closed, a hole is formed at a position overlapping the connection port with the intermediate pressure portion. It is a formed plate-shaped member, It is characterized by the above-mentioned.

A guide hole is formed in the open / close valve, and a guide rod provided in the open / close valve chamber and extended in the moving direction is provided through the guide hole.

The opening / closing valve chamber is formed in a cylindrical shape in which a connection port between the refrigerant inlet chamber and a connection port between the intermediate pressure portion is formed on a bottom surface thereof.

The on-off valve is a circular plate-shaped member in which the guide hole is formed, and the guide rod is provided so as not to rotate about the guide rod by engaging the guide hole.

The opening / closing valve chamber is formed in a cylindrical shape in which a connection port between the refrigerant inlet chamber and a connection port between the intermediate pressure portion is formed on a bottom surface thereof.

The said open / close valve is circular of diameter smaller than the circle | round | yen of the bottom face of the said open / close valve chamber, The guide hole of the same shape is formed in substantially the same dimension as the outer periphery of the said guide rod, It is characterized by the above-mentioned.

The on-off valve is a leaf spring.

The compression unit includes a rocking scroll having rocking vortices formed on an upper surface side of the rocking base plate, and a fixed vortex that engages with the rocking vortex of the rocking scroll to form the compression chamber. Has a fixed scroll formed on the lower surface side,

The coolant inflow chamber is a room formed inside from the side of the fixed base plate,

The on-off valve chamber is a room formed on an upper surface side of the fixed base plate.

The opening / closing valve chamber is a room in which a recess formed on an upper surface side of the fixed base plate is covered with a back plate.

The compression unit forms a compression chamber in which the swinging vortex of the rocking scroll and the fixed vortex of the fixed scroll are engaged to form a pair,

The on-off valve chamber is provided corresponding to each compression chamber of the pair of compression chambers.

The injection-compatible compressor is also,

A hermetically sealed container accommodating the compression part and the refrigerant injection part therein;

It is provided through the side surface of the sealed container, characterized in that the injection pipe for introducing the injection refrigerant into the refrigerant inlet chamber from the outside.

The closed container has a lower container and an upper container which forms a sealed space therein in combination with the lower container,

The injection pipe is characterized in that it is provided through the side portion of the lower container.

For example, in the manufacturing method of the scroll-compatible scroll compressor according to the present invention,

A swinging winding is formed on one side of the swinging slab,

Form the fixed spiral wound on one side of the fixed base plate,

A side hole is formed in the side of the fixing base;

On the other side of the fixed base plate, a recess is formed,

A first communication hole for communicating the bottom surface of the trench and the side hole, and a second communication hole for communicating the bottom surface of the trench and the one side side of the fixing base, and being formed in the fixing base,

An opening / closing valve for opening / closing the first communication hole is disposed at the indentation formed in the fixed base plate,

Attaching the back plate to the fixed base plate so as to close the opening of the pit where the on-off valve is disposed;

The swinging base on which the swinging winding is formed is placed in a sealed container,

The fixed base formed with the fixed vortex is disposed in the hermetically sealed container so as to form a compression chamber by engaging the fixed vortex with the swing vortex.

A suction pipe for introducing suction refrigerant into the compression chamber from the outside of the sealed container to a suction port of the compression chamber,

An injection pipe for introducing an injection refrigerant into the side hole from the outside of the sealed container is connected to the side hole.

Since the heat pump apparatus according to the present invention opens and closes the flow path from the injection pipe to the compression chamber according to the opening degree of the second expansion valve, the refrigerant during compression in the compression chamber flows into the injection circuit when the injection operation is not performed. Can be prevented.

1 is a longitudinal sectional view of a scroll compressor 100 according to the first embodiment.
FIG. 2 is an enlarged top view (1) of the scroll compressor 100 shown in FIG.
3 is an enlarged top view (2) of the scroll compressor 100 shown in FIG.
4 is an enlarged top view (3) of the scroll compressor 100 shown in FIG.
5 shows a heat pump apparatus having an injection circuit.
FIG. 6 is a Moriel diagram showing a state of a refrigerant of the heat pump apparatus shown in FIG. 5. FIG.
FIG. 7 is a view showing the relative position of the swinging scroll 2 with respect to the fixed scroll 1 every 90 degrees with a suction completion state of 0 degrees. FIG.
8 is an exploded perspective view showing the configuration of the injection chamber 1f.
FIG. 9 is a diagram illustrating the vicinity of one injection chamber 1f when an injection operation is performed. FIG.
Fig. 10 is a diagram showing the vicinity of one injection chamber 1f when the injection operation is not performed.
11 is a longitudinal sectional view of the scroll compressor 100 according to the second embodiment.

EMBODIMENT OF THE INVENTION Hereinafter, embodiment of this invention is described based on drawing.

In addition, in the following description, injection means returning the liquid refrigerant (on the high pressure side) or two-phase refrigerant or gas refrigerant | coolant after exiting a condenser to the middle of the compression chamber of a compressor, and to recompress. The liquid refrigerant or the two-phase refrigerant or the gas refrigerant (on the high pressure side) after exiting the condenser is called an injection refrigerant. In addition, after exiting a condenser, the refrigerant | coolant after passing through a predetermined | prescribed expansion valve, a predetermined heat exchanger, etc. may be sufficient not just after exiting a condenser. In addition, a condenser may be read as a radiator, a heat exchanger which heats a load side, or a gas cooler.

Embodiment 1.

1 is a longitudinal sectional view of the scroll compressor 100 according to the first embodiment. The scroll compressor 100 is an injection-compatible compressor having an injection mechanism, as described later.

2 to 4 are enlarged views of the upper portion of the scroll compressor 100 shown in FIG. 1, and all show the same parts. 2 is a diagram for explaining the fixed scroll 1 in particular. 3 is a view for explaining the rocking scroll 2 in particular. FIG. 4 is a diagram specifically illustrating the compliant frame 3 and the guide frame 4. In addition, in FIG. 1 thru | or 4, the invisible component is shown with a broken line.

First, the configuration of the scroll compressor 100 will be described.

As shown in FIG. 1, the scroll compressor 100 includes a fixed scroll 1, a rocking scroll 2, a compliant frame 3, a guide frame 4, an electric motor 5, and a subframe 6. The main shaft 7 and the Oldham mechanism 8 are formed to be housed in the sealed container 10. In addition, the fixed scroll 1 and the swinging scroll 2 are collectively called a compression unit.

Based on FIG. 1, 2, the fixed scroll 1 is demonstrated.

The outer circumferential portion of the fixed scroll 1 is fastened to the guide frame 4 by bolts and fixed.

The plate-shaped vortex 1b (fixed vortex) is formed on one side side (lower side in FIG. 2) of the large plate portion 1a of the fixed scroll 1. The compression chamber 20 is formed by engaging the vortex 1b of the fixed scroll 1 with the vortex 2b (swinging vortex) of the rocking scroll 2 mentioned later.

On the outer circumferential portion of the one surface side (lower side in Fig. 2) of the large plate portion 1a, two old dam guide grooves 1c are formed almost in a straight line. The pole 8b of the old dam mechanism 8 is freely engaged with the old dam guide groove 1c.

The discharge port 1d penetrates through the large plate part 1a in the substantially center part of the large plate part 1a.

Moreover, from the side part of the base plate part 1a, the inside of the exterior of the sealed container 10 via the injection pipe 41 (coolant inlet port) provided through the airtight container 10 at the side part of the base plate part 1a. A coolant inflow chamber 1e through which the injection refrigerant flows from the injection circuit is formed.

In addition, two opening / closing valve chambers 1f (return valve chambers) in which two openings are covered with a lid by the back plate 31 on the surface side (upper side in FIG. 2) opposite to the large plate portion 1a and sealed. ) Is formed. The lower surface of each open / close valve chamber 1f is connected to the inlet chamber communication path 1g (inlet chamber communication hole, first communication hole) communicating with the refrigerant inlet chamber 1e, and the compression chamber communicates with the compression chamber 20. The connection port with the real communication path 1h (compression chamber communication hole, 2nd communication hole) is formed. Moreover, the opening / closing valve 30 (return valve) is accommodated in each open / close valve chamber 1f.

The opening and closing valve 30, the back plate 31, and the like will be described later in detail.

In addition, injection refrigerant is injected into the refrigerant chamber such as the refrigerant inflow chamber 1e, the inflow chamber communication path 1g, the open / close valve chamber 1f, the compression chamber communication path 1h, the open / close valve 30, the back plate 31, and the like. The mechanism for injecting in is called a refrigerant injecting unit.

Based on FIG. 1, 3, the rocking scroll 2 is demonstrated.

On one surface side (upper side in FIG. 3) of the large plate portion 2a of the swinging scroll 2, a plate-shaped vortex 2b having substantially the same shape as the vortex 1b of the fixed scroll 1 is formed. have. As described above, the compression chamber 20 is formed by engaging the vortex 1b of the fixed scroll 1 and the vortex 2b of the swinging scroll 2.

On the outer peripheral part of the surface side (lower side of FIG. 3) opposite to the vortex 2b of the large plate part 2a, the old dam guide groove 2e which has a phase difference of approximately 90 degrees with the old dam guide groove 1c of the fixed scroll 1 Two are formed in a substantially straight line. The pole 8a of the old dam mechanism 8 is freely engaged with the old dam guide groove 2e.

In addition, a hollow cylindrical boss portion 2f is formed at the center of the surface side (lower side in FIG. 3) opposite to the vortex 2b of the large plate portion 2a, and the inside of the boss portion 2f is It becomes the swing bearing 2c. The rocking shaft part 7b of the upper end of the main shaft 7 is engaged with the rocking bearing 2c. In addition, the space between the swing bearing 2c and the swing shaft portion 7b is called the boss portion space 15a.

Moreover, on the outer diameter side of the boss | hub part 2f, the thrust bearing 3a of the compliant frame 3 and the thrust surface 2d which can slide by pressure contact are formed. In addition, on the outer diameter side of the boss part 2f, the space formed between the thrust surface 2d of the swinging scroll 2 and the compliant frame 3 is called the boss part outer diameter space 15b. In addition, on the outer diameter side of the thrust bearing 3a, the space formed between the large plate part 2a of the swinging scroll 2 and the compliant frame 3 is called the large plate outer diameter space 15c. The large-diameter outer diameter space 15c is a low pressure space of intake gas atmospheric pressure (suction pressure).

In addition, the additional plate 2a penetrates from the surface on the fixed scroll 1 side (upper surface in FIG. 3) to the surface on the compliant frame 3 side (lower surface in FIG. 3). I) A hole 2j is provided. That is, the additional board | substrate 2j which communicates the compression chamber 20 and the space on the thrust surface 2d side is provided in the base board part 2a. In addition, the circular trajectory which the opening part (lower opening part 2k) of the compliant frame 3 side of the bleed hole 2j draws at the time of normal operation | movement is the thrust bearing 3a of the compliant frame 3 The additional hole 2j is disposed so as to always converge inside. Therefore, the coolant does not leak from the additional hole 2j into the boss outer diameter space 15b and the base plate outer diameter space 15c.

Based on FIGS. 1 and 4, the compliant frame 3 and the guide frame 4 will be described.

The compliant frame 3 is supported in the radial direction by the cylindrical surfaces 4a and 4b provided in the inner peripheral part of the guide frame 4 with the upper and lower cylindrical surfaces 3d and 3e provided in the outer peripheral part. In the central part of the compliant frame 3, a main shaft support 3c and an auxiliary main shaft support 3h for radially supporting the main shaft 7 which are rotationally driven by the electric motor 5 are formed.

Here, the space formed between the guide frame 4 and the compliant frame 3 and partitioned up and down by ring-shaped seal materials 16a and 16b is called frame space 15d. Moreover, the ring-shaped seal groove which accommodates the real materials 16a and 16b is formed in two places in the inner peripheral surface of the guide frame 4. However, this thread groove may be formed on the outer circumferential surface of the compliant frame 3.

The compliant frame 3 penetrates from the thrust bearing 3a side to the frame space 15d side at a position opposed to the lower opening 2k of the bleed hole 2j, and always or intermittently. A communication hole 3s communicating between 2j) and the frame space 15d is formed.

In addition, in the compliant frame 3, an adjustment valve space 3p in which a valve 3t for adjusting the pressure of the boss portion outer diameter space 15b, a valve press 3y, and an intermediate pressure adjustment spring 3m is housed is stored. It is prepared. The intermediate pressure adjustment spring 3m is housed in the adjustment valve space 3p in a state that is contracted more than the natural length. In addition, the space between the compliant frame 3 and the guide frame 4 on the outer diameter side of the valve 3t is called a valve outer diameter space 15e.

Moreover, the compliant slide 3 is provided with the reciprocating slide part 3x by which the old dam mechanism annular part 8c reciprocally slides on the outer diameter side of the thrust bearing 3a. In the reciprocating slide part 3x, the communication hole 3n which communicates the valve outer diameter space 15e and the board | substrate outer diameter part space 15c is formed.

The guide frame 4 is fixed to the airtight container 10 by the outer peripheral surface by shrink fitting and welding. However, the notch is provided in the outer peripheral part of the guide frame 4, and the flow path which the coolant discharged from the discharge port 1d flows into the discharge pipe 43 is ensured.

An upper fitting cylindrical surface 4a is formed on the fixed scroll 1 side (upper side in FIG. 4) on the inner side of the guide frame 4. The image fitting cylindrical surface 4a is engaged with the image fitting cylindrical surface 3d formed on the outer circumferential surface of the compliant frame 3.

Moreover, the lower fitting cylindrical surface 4b is formed in the electric motor 5 side (lower side of FIG. 4) of the inner side surface of the guide frame 4. As shown in FIG. The lower fitting cylindrical surface 4b is engaged with the lower fitting cylindrical surface 3e formed on the outer circumferential surface of the compliant frame 3.

Based on FIG. 1, the main shaft 7 is demonstrated.

On the rocking scroll 2 side (upper side in FIG. 1) of the main shaft 7, a rocking shaft portion 7b which rotatably engages with the rocking bearing 2c of the rocking scroll 2 is formed. Below the swing shaft portion 7b, a main shaft portion 7c is rotatably engaged with the main shaft support 3c and the auxiliary main shaft support 3h of the compliant frame 3.

On the reverse side of the main shaft 7 (lower side in FIG. 1), a sub shaft portion 7d is rotatably engaged with the sub shaft bearing 6a of the subframe 6. The rotor 5a of the electric motor 5 is shrink-fit between the minor shaft portion 7d and the above-described main shaft portion 7c, and a stator 5b is provided around it.

Moreover, the high pressure oil supply hole 7g provided through the axial direction is provided in the inside of the main shaft 7. Moreover, the oil pipe 7f which communicated with the high pressure oil supply hole 7g is press-fitted in the lower end surface of the main shaft 7.

Next, the operation of the scroll compressor 100 will be described.

The low pressure suction refrigerant enters the compression chamber 20 formed by the vortex 1b of the fixed scroll 1 and the vortex 2b of the swinging scroll 2 from the suction pipe 42. Moreover, the injection refrigerant which flowed in through the injection pipe 41 from the exterior from the compression chamber communication path 1h via the refrigerant inflow chamber 1e, the inflow chamber communication path 1g, and the opening / closing valve chamber 1f. It is injected into the compression chamber 20. In addition, when the injection operation is not performed, the injection refrigerant is not injected into the compression chamber 20.

The main shaft 7 is driven by the electric motor 5, and the swinging scroll 2 is driven. The swinging scroll 2 does not rotate by the old dam mechanism 8 but rotates (eccentric swinging), and performs the compression operation of gradually reducing the volume of the compression chamber 20. By this compression operation, the suction refrigerant becomes high pressure and is discharged into the sealed container 10 from the discharge port 1d of the fixed scroll 1. The discharged refrigerant is discharged out of the sealed container 10 from the discharge pipe 43. That is, the inside of the airtight container 10 becomes high pressure.

As described above, the inside of the airtight container 10 becomes high pressure at the time of normal operation. By this pressure, the refrigeration oil 11 accumulated in the bottom part of the airtight container 10 flows the oil pipe 7f and the high pressure oil supply hole 7g toward the rocking scroll 2 side (upper side of FIG. 1). . The high-pressure refrigeration oil is led to the boss portion space 15a, is reduced to an intermediate pressure Pm1 higher than the suction pressure and lower than the discharge pressure, and flows into the boss portion outer diameter space 15b.

Moreover, the high pressure oil which flows through the high pressure oil supply hole 7g is guide | induced between the main shaft support 3c and the main shaft part 7c from the horizontal blood provided in the main shaft 7. The refrigeration oil guided between the spindle support 3c and the spindle portion 7c is decompressed to an intermediate pressure Pm1 higher than the suction pressure and less than the discharge pressure between the spindle support 3c and the spindle portion 7c. It flows into the boss part outer diameter space 15b.

In addition, the refrigeration oil which becomes the intermediate pressure Pm1 of the boss part outer diameter space 15b is foaming of the refrigerant melt | dissolved in the refrigeration oil, and is generally made into two phases of a gas refrigerant and a refrigeration oil.

The refrigeration oil which became intermediate pressure Pm1 of the boss | hub part outer diameter space 15b passes through the adjustment valve space 3p, and flows into the valve outer diameter space 15e. The refrigeration oil which flowed into the valve outer diameter space 15e passes through the communication hole 3n, and is discharged inside the old dam mechanism annular part 8c. Here, when passing through the adjustment valve space 3p, the refrigeration oil overcomes the force added by the intermediate pressure adjustment spring 3m, and pushes up the intermediate pressure adjustment valve 3t to the valve outer diameter space 15e. Flow.

In addition, the refrigeration oil which became intermediate pressure Pm1 of the boss part outer diameter space 15b is lubricated by the thrust surface 2d of the oscillation scroll 2, and the slide part of the thrust bearing 3a of the compliant frame 3, Is discharged to the inside of the old dam mechanism annular portion 8c.

The refrigeration oil discharged to the inside of the old dam mechanism annular portion 8c is lubricated to the slide surface of the old dam mechanism annular portion 8c and the slide surfaces of the poles 8a and 8b of the old dam mechanism 8. It is opened to the board | substrate outer diameter space 15c.

Here, the intermediate pressure Pm1 of the boss part outer diameter space 15b is set to the predetermined pressure alpha which is almost determined by the springing force of the intermediate pressure adjustment spring 3m and the exposed area of the intermediate pressure adjustment valve 3t. Thus, "Pm1 = Ps + α" is represented. In addition, Ps is suction atmospheric pressure, ie, low pressure.

In addition, the lower opening 2k of the additional hole 2j includes an opening (upper opening 3u shown in FIG. 4) on the thrust bearing 3a side of the communication hole 3s provided in the compliant frame 3. Communicate all the time, or intermittently. For this reason, the refrigerant gas during the compression from the compression chamber 20 is guided to the frame space 15d through the bleed hole 2j of the swinging scroll 2 and the communication hole 3s of the compliant frame 3. do. Since this refrigerant gas is in the middle of compression, it is an intermediate pressure Pm2 higher than the suction pressure and below the discharge pressure.

In addition, even if the refrigerant gas is guided, since the frame space 15d is a closed space enclosed by the upper real 16a and the lower real 16b, the compression chamber 20 is normally used during normal operation. In response to the pressure fluctuation of the compression chamber 20, the compression chamber 20 and the frame space 15d have a small flow in both directions. In other words, the compression chamber 20 and the frame space 15d are in a breathing state.

Here, the intermediate pressure Pm2 of the frame space 15d is represented by "Pm2 = Ps x β" by a predetermined magnification β almost determined by the position of the compression chamber 20 to communicate with. In addition, Ps is inhalation atmosphere ie low pressure.

Here, in the compliant frame 3, (A) the force caused by the intermediate pressure Pm1 of the boss portion outer diameter space 15b, and (B) the tightness from the rocking scroll 2 through the thrust bearing 3a. The sum of the pressing force (A + B) acts as the downward force.

On the other hand, in the compliant frame 3, (C) due to the force caused by the intermediate pressure Pm2 of the frame space 15d and (D) due to the high pressure acting on the part exposed to the high pressure atmosphere of the lower end surface. The sum with force (C + D) acts as an upward force.

In normal operation, the upward force C + D is set to be larger than the downward force A + B.

In normal driving, since the upward force C + D is set to be larger than the downward force A + B, the compliant frame 3 moves toward the fixed scroll 1 side (upper FIG. 1). You are in a hilarious state. That is, in the compliant frame 3, the upper fitting cylindrical surface 3d is guided to the upper fitting cylindrical surface 4a of the guide frame 4, and the lower fitting cylindrical surface 3e is of the guide frame 4. It is guided to the lower fitting cylindrical surface 4b, and is raised to the fixed scroll 1 side (FIG. 1 upper side). That is, the compliant frame 3 rises to the fixed scroll 1 side (upper side in FIG. 1) and is pressed into the swinging scroll 2 through the thrust bearing 3a.

Since the compliant frame 3 is firmly pressed against the swinging scroll 2, the swinging scroll 2 is also raised to the fixed scroll 1 side (upper side in FIG. 1) similarly to the compliant frame 3. do. As a result, the tooth line of the vortex 2b of the rocking scroll 2 and the tooth bottom of the fixed scroll 1 come into contact with each other, and the vortex of the fixed scroll 1 The tooth line of (1b) and the tooth bottom (base plate part 2a) of the rocking scroll 2 contact.

On the other hand, when the transition period such as the start of the compressor or the internal pressure of the compression chamber 20 abnormally rises, the tightness from the swinging scroll 2 through the (B) thrust bearing 3a described above is tight. The pressing force increases. Therefore, downward force A + B becomes larger than upward force C + D. As a result, the compliant frame 3 is pressed against the guide frame 4 side (lower side in FIG. 1). Then, the tooth line of the vortex 2b of the swinging scroll 2 and the tooth bottom of the fixed scroll 1 are separated, and the tooth line of the vortex 1b of the fixed scroll 1 falls. And the jitter (base plate portion 2a) of the swinging scroll 2 falls. Thereby, the pressure in the compression chamber 20 falls, and excessive increase in the pressure in the compression chamber 20 is prevented.

Next, operation | movement of the heat pump apparatus (refrigeration cycle apparatus) provided with the scroll compressor 100 is demonstrated.

5 is a diagram illustrating an example of a circuit configuration of a heat pump apparatus having an injection circuit. FIG. 6 is a Moriel diagram showing a state of a refrigerant of the heat pump apparatus shown in FIG. 5. In Fig. 6, the horizontal axis represents specific enthalpy and the vertical axis represents refrigerant pressure.

First, the operation during heating operation will be described. In the heating operation, the four-way valve 58 is set in the solid line direction. In addition, this heating operation includes not only heating used as air conditioning but also hot water supply which heats water and produces hot water.

The gas phase refrigerant (point 1 in FIG. 6), which has become a high temperature and high pressure in the compressor 51 (scroll compressor 100), is discharged from the discharge pipe 43 of the compressor 51, and is a heat exchanger 52 that becomes a condenser and a radiator. ) To liquefy by heat exchange (dot 2 in Figure 6). At this time, the air or water is warmed by the heat radiated from the coolant, resulting in heating or hot water supply.

The liquid refrigerant liquefied in the heat exchanger 52 is decompressed to the intermediate pressure by the first expansion valve 53 (decompression mechanism), and is in a gas-liquid two-phase state (point 3 in FIG. 6). The refrigerant which has become a gas-liquid two-phase state in the first expansion valve 53 is heat-exchanged with the refrigerant sucked into the compressor 51 in the receiver 59, cooled, and liquefied (dot 4 in FIG. 6). The liquid refrigerant liquefied in the receiver 59 branches and flows to the internal heat exchanger 54, the third expansion valve 55 side (mainstream), and the second expansion valve 56 side (feeder, injection circuit). .

The liquid refrigerant flowing through the main stream is heat-reduced by the internal flow exchanger 54 and the refrigerant flowing through the tributary which has been depressurized by the second expansion valve 56 to become a gas-liquid two-phase state, and further cooled (dot 5 in FIG. 6). The liquid refrigerant cooled by the internal heat exchanger 54 is reduced in pressure by the third expansion valve 55 (decompression mechanism) to be in a gas-liquid two-phase state (point 6 in FIG. 6). The refrigerant which became the gas-liquid two-phase state by the 3rd expansion valve 55 heat-exchanges and heats in the heat exchanger 57 used as an evaporator (point 7 of FIG. 6). Then, the refrigerant heated in the heat exchanger 57 is heated by the receiver 59 again (point 8 in FIG. 6), and is sucked into the compressor 51 from the suction pipe 42.

On the other hand, as described above, the refrigerant flowing through the tributary is depressurized by the second expansion valve 56 (decompression mechanism) (point 9 in FIG. 6) and heat exchanged in the internal heat exchanger 54 (point 10 in FIG. 6). ). The refrigerant (injection refrigerant) in the gas-liquid two-phase state heat-exchanged by the internal heat exchanger 54 is the refrigerant inflow chamber 1e of the fixed scroll 1 from the injection pipe 41 of the compressor 51 while in the gas-liquid two-phase state. Flows in.

Although the compression operation | movement in the compressor 51 is mentioned in detail later, in the compressor 51, the refrigerant | coolant (point 8 of FIG. 6) which flowed in the mainstream and was sucked in from the suction pipe 42 is compressed and heated to intermediate pressure. (Point 11 in FIG. 6). The refrigerant (point 11 in FIG. 6) and the injection refrigerant (point 8 in FIG. 6) that have been compressed and heated to the intermediate pressure are joined to reduce the temperature (point 12 in FIG. 6). Then, the coolant (point 12 in Fig. 6) whose temperature is lowered is further compressed, heated to high temperature and high pressure, and discharged (point 1 in Fig. 6).

In addition, when the injection operation is not performed, the opening degree of the second expansion valve 56 is made closed. That is, when the injection operation is performed, the opening degree of the second expansion valve 56 is larger than the predetermined opening degree. However, when the injection operation is not performed, the opening degree of the second expansion valve 56 is larger than the predetermined opening degree. Make it small. As a result, the injection refrigerant flowing into the refrigerant inflow chamber 1e of the compressor 51 is shut off. That is, all of the refrigerant passing through the heat exchanger 52, the first expansion valve 53, and the receiver 59 is sucked from the suction pipe 42 to the compressor 51.

Here, the opening degree of the 2nd expansion valve 56 is controlled by electronic control, for example.

Next, the operation during the cooling operation will be described. In the cooling operation, the four-way valve 58 is set in the broken line direction.

The gaseous phase refrigerant (point 1 in FIG. 6), which has become a high temperature and high pressure in the compressor 51 (scroll compressor 100), is discharged from the discharge pipe 43 of the compressor 51 and used in a heat exchanger 57 that becomes a condenser. Heat exchange and liquefy (dot 2 in FIG. 6). The liquid refrigerant liquefied in the heat exchanger (57) is decompressed to an intermediate pressure by the third expansion valve (55), thereby bringing it into a gas-liquid two-phase state (point 3 in Fig. 6). The refrigerant which has become a gas-liquid two-phase state in the third expansion valve 55 is heat-exchanged in the internal heat exchanger 54, cooled, and liquefied (dot 4 in FIG. 6). In the internal heat exchanger 54, the refrigerant which has been in the gas-liquid two-phase state in the third expansion valve 55 and the liquid refrigerant liquefied in the internal heat exchanger 54 are reduced in the second expansion valve 56 to reduce the gas-liquid two-phase. The refrigerant | coolant (point 9 of FIG. 6) which became the state is heat-exchanged. The liquid phase refrigerant (point 4 in FIG. 6) heat-exchanged by the internal heat exchanger 54 flows branched to the receiver 59 side (mainstream) and the internal heat exchanger 54 side (feeder, injection circuit).

The liquid refrigerant flowing through the main stream is heat-exchanged with the refrigerant sucked into the compressor 51 by the receiver 59, and is further cooled (dot 5 in FIG. 6). The liquid refrigerant cooled by the receiver 59 is depressurized by the first expansion valve 53 to be in a gas-liquid two-phase state (point 6 in FIG. 6). The refrigerant which has become a gas-liquid two-phase state by the first expansion valve 53 is heat-exchanged by the heat exchanger 52 which becomes an evaporator, and is heated (point 7 of FIG. 6). At this time, air or water is cooled by endothermic cooling, and cooling is performed, cold water or ice is made, or frozen.

Then, the refrigerant heated in the heat exchanger 57 is heated again in the receiver 59 (point 8 in FIG. 6) and is sucked into the compressor 51 from the suction pipe 42.

On the other hand, the refrigerant flowing through the tributary is depressurized by the second expansion valve 56 (point 9 in FIG. 6) and heat-exchanged in the internal heat exchanger 54 (point 10 in FIG. 6). The refrigerant (injection refrigerant) in the gas-liquid two-phase state heat-exchanged by the internal heat exchanger 54 is the refrigerant inflow chamber 1e of the fixed scroll 1 from the injection pipe 41 of the compressor 51 while in the gas-liquid two-phase state. Flows in.

The compression operation in the compressor 51 is the same as in the heating operation.

In addition, when the injection operation is not performed, the injection refrigerant flowing into the refrigerant inlet chamber 1e of the compressor 51 is shut off with the opening degree of the second expansion valve 56 closed, similarly to the heating operation.

Here, the injection operation is usually the case of heating operation. Therefore, injection operation is not usually performed during the cooling operation. In addition, even during heating operation, the injection operation is not always performed. For example, when the outside temperature is equal to or less than a predetermined temperature (for example, 2 ° C.), or the rotation speed of the compressor is equal to or greater than a predetermined frequency (for example, 60 Hz). In this case, the heating capability can be increased by the injection operation, and a heat pump device having good heating and hot water supply performance can be obtained. If the injection operation is not necessary, the injection operation is not performed with the degree of opening of the second expansion valve 56 closed even during the heating operation.

Of course, the criterion of whether or not the injection operation is not necessarily the above-described criterion, for example, the injection operation may be performed during the cooling operation.

As described above, the heat exchanger 52 may be a heat exchanger for performing heat exchange between a liquid refrigerant such as water and a liquid refrigerant that has become a high temperature and a low pressure or a gaseous refrigerant that has become a high temperature and a high temperature or a low temperature as described above. A heat exchanger may be used for heat exchange between a low-pressure liquid refrigerant and a gas such as air. That is, the heat pump apparatus described with reference to FIGS. 5 and 6 may be an air conditioning apparatus, a hot water supply apparatus, or a refrigeration apparatus or a refrigeration apparatus.

The compression operation of the scroll compressor 100 will be described.

FIG. 7: is the figure which shows the relative position of the rocking scroll 2 with respect to the fixed scroll 1 every 90 degree | times, with a suction completion state as 0 degree.

Compression chambers 20a and 20b are formed by engaging the vortex 1b of the fixed scroll 1 with the vortex 2b of the swinging scroll 2. In addition, the compression chambers 20a and 20b are collectively called the compression chamber 20. The compression chamber 20 moves to the center portion with the volume gradually decreasing as the rocking scroll 2 rotates with the rotation of the main shaft 7. That is, the refrigerant sucked into the compression chamber 20 is gradually compressed by the orbital movement of the swinging scroll 2 with the rotation of the main shaft 7, and moves to the center part while raising the pressure. When the compression chamber 20 communicates with the discharge port 1d provided at the center, the compressed refrigerant is discharged from the discharge port 1d into the sealed container 10.

As described above, the viewpoint of 0 degrees is a state where suction of the refrigerant is completed. At 0 degrees, the refrigerant is sucked into the compression chamber 20 from the suction pipe 42, and the compression chamber 20 is in a sealed state.

When the main shaft 7 is rotated 90 degrees from the zero-degree point of time (the refrigerant suction completion point), the volume of the compression chamber 20 is slightly reduced, and the compression chamber 20 moves slightly closer to the center part. At this point, the compression chamber 20 communicates with the compression chamber communication path 1h. Therefore, if the injection operation is performed, the injection refrigerant flows in from the compression chamber communication path 1h. In other words, the suction refrigerant sucked into the compression chamber 20 from the suction pipe 42 is higher than the suction pressure (low pressure) at the time of suction and lower than the discharge pressure (high pressure) at the time of discharge from the discharge port 1d. The injection refrigerant is injected into the intermediate pressure portion that becomes the pressure.

At the completion of refrigerant suction, the main shaft 7 rotates 180 degrees, 270 degrees, and 360 degrees. In the meantime, the compression chamber 20 communicates with the compression chamber communication path 1h. Therefore, at this time, while the injection refrigerant flows into the compression chamber 20 from the compression chamber communication path 1h, the refrigerant in the compression chamber 20 is compressed and gradually moves closer to the center portion.

When the rotation of the main shaft 7 passes 360 degrees from the completion point of the refrigerant suction, the compression chamber 20 terminates the communication with the compression chamber communication path 1h. After that, the refrigerant in the compression chamber 20 is compressed without the inflow of the refrigerant into the compression chamber 20 from the outside until the compression chamber 20 communicates with the discharge port 1d.

When the rotation of the main shaft 7 passes 450 degrees at the completion point of the refrigerant suction, the compression chamber 20 communicates with the discharge port 1d, and the compressed refrigerant is discharged from the discharge port 1d into the sealed container 10. Discharged.

On the other hand, when the rotation of the main shaft 7 is 360 degrees from the completion of the refrigerant suction, the suction of the refrigerant is completed in the outermost compression chamber 20. Similarly, when the rotation of the main shaft 7 is 450 degrees from the completion point of the refrigerant suction, the outermost compression chamber 20 and the compression chamber communication path 1h start communicating. In this way, in the scroll compressor 100, the refrigerant is repeatedly compressed.

Moreover, the compression chamber 20a, 20b is comprised so that one compression chamber communication path 1h may communicate with the other opening / closing valve chamber 1f, respectively. That is, as mentioned above, two open / close valve chambers 1f are formed in the base plate 1a of the fixed scroll 1. The open / close valve chamber 1f and the compression chamber 20a of the two open / close valve chambers 1f communicate with each other, and the other open / close valve chamber 1f and the compression chamber 20b communicate with each other. do.

Next, the structure of the on-off valve chamber 1f is demonstrated.

FIG. 8: is an exploded perspective view which shows the structure of the opening / closing valve chamber 1f. In addition, in FIG. 8, the invisible component is shown with a broken line.

The two opening / closing valve chambers 1f cover the back plate 31 with two circumferential recesses provided on the reverse side with the vortex 1b of the large plate part 1a of the fixed scroll 1, and the bolt 34 It is formed by fastening by sealing. Here, one back plate 31 covering both openings of two recesses is covered. Of course, a separate back plate 31 may be covered in each recess.

Moreover, the connection port of the inflow chamber communication path 1g and the compression chamber communication path 1h is formed in the lower surface of each recess. The inflow chamber communication path 1g communicates with the refrigerant inflow chamber 1e which is formed inward from the side of the base plate 1a. Moreover, the compression chamber communication path 1h communicates with the surface of the spiral winding 1b side. That is, the compression chamber communication path 1h communicates with the compression chamber 20. That is, the connection port with the refrigerant | coolant inflow chamber 1e, and the connection port with the compression chamber 20 are formed in the lower surface of each recess.

Each open / close valve chamber 1f is provided with an open / close valve 30 formed in a circular plate shape having a diameter substantially the same as the inner diameter of the recess or a slightly smaller diameter. In the open / close valve 30, a passage hole 30a and a guide hole 30b are formed. The open / close valve 30 is disposed at a position where the passage hole 30a overlaps the connection port with the compression chamber communication path 1h. And the opening-closing valve 30 inserts the guide protrusion part 31a (guide rod) formed in the back plate 31 in the guide hole 30b, and is arrange | positioned in the opening-closing valve chamber 1f.

The guide projection 31a is a projection extending in a rod shape in a vertical direction (up-down direction, vertical direction in FIG. 1) with the surface on which the inflow chamber communication path 1g and the compression chamber communication path 1h are formed. In addition, while the guide hole 30b is formed in a keyhole shape, the guide protrusion 31a is also formed in a key shape. Therefore, although the opening / closing valve 30 is movable in the surface direction and the vertical direction (up-down direction of FIG. 1) of the fixed base plate in the opening / closing valve chamber 1f, the guide hole 30b and the guide protrusion part 31a are By engaging, it will be in the state which does not rotate with the guide protrusion 31a as an axis. That is, the position of the through-hole 30a arrange | positioned in the position which communicates with the compression chamber communication path 1h does not shift.

In addition, the opening / closing valve 30 has a circular shape having a diameter substantially the same as the inner diameter of the recess, or the guide hole 30b has almost the same dimensions and the same shape as the outer periphery of the guide protrusion 31a, thereby opening and closing the valve in the horizontal direction. (30) does not slip off. In addition, when the on-off valve 30 is made into a circle having a diameter substantially the same as the inner diameter of the recess, the outer periphery of the on-off valve 30 and the inner wall of the recess may rub, causing burring. Therefore, it is preferable to make the opening / closing valve 30 into the circular shape of diameter slightly smaller than the inner diameter of the dent, and to make the guide hole 30b the same shape with substantially the same dimension as the outer periphery of the guide protrusion 31a.

In addition, since the recessed part was made into the column shape here, and the open-close valve 30 was made into the circular plate shape, it was made into the shape which is easy to process and easy to manufacture, and therefore the shape of the guide hole 30b and the guide protrusion part 31a. It is necessary to prevent the rotation of the on-off valve 30 by the invention. However, it is also possible to prevent the rotation of the opening / closing valve 30 by setting the recessed portion in the shape of a column and the opening / closing valve 30 in a polygonal shape.

The operation of the on-off valve 30 will be described.

FIG. 9 is a diagram showing the vicinity of one open / close valve chamber 1f when the injection operation is performed.

When the injection operation is performed, the injection refrigerant in the gas-liquid two-phase state flows into the refrigerant inflow chamber 1e formed in the large plate portion 1a of the fixed scroll 1 from the injection pipe 41. The injection refrigerant flowing into the refrigerant inflow chamber 1e flows into the two inflow chamber communication paths 1g, respectively.

Here, normally, the pressure of the injection refrigerant which flowed into the refrigerant inlet chamber 1e is in the compression chamber 20 (especially, the position where the compression chamber communication path 1h communicated in the compression chamber 20, ie, the intermediate | middle pressure part). Is higher than the pressure of the refrigerant. Therefore, the injection refrigerant which flowed into the inflow chamber communication path 1g pushes the on / off valve 30 provided in the on-off valve chamber 1f to the back plate 31 side (upper side of FIG. 9). As a result, the injection refrigerant which flowed into the inflow chamber communication path 1g flows into the on-off valve chamber 1f. And when the compression chamber 20 communicates with the compression chamber communication path 1h, the injection refrigerant of the open / close valve chamber 1f flows into the compression chamber 20 through the compression chamber communication path 1h.

FIG. 10: is a figure which shows the vicinity of one open / close valve chamber 1f when an injection operation is not performed.

As described with reference to Figs. 5 and 4, when the injection operation is not performed, the second expansion valve 56 in the heat pump device is closed. Therefore, the injection refrigerant does not flow into the refrigerant inflow chamber 1e.

However, the pressure in the compression chamber 20 (particularly, the position where the compression chamber communication path 1h communicates with the compression chamber 20, that is, the intermediate pressure portion) is increased from the refrigerant inlet chamber 1e to the opening / closing valve chamber 1f. Since the compression chamber 20 communicates with the compression chamber communication passage 1h, the refrigerant in the compression chamber 20 passes through the compression chamber communication passage 1h to the on-off valve chamber 1f because the pressure of the refrigerant is higher than the pressure of the refrigerant. Reflux.

In this case, the refrigerant flowing into the open / close valve chamber 1f passes through the through hole 30a of the open / close valve 30 and flows into the open / close valve chamber 1f. However, since the pressure in the compression chamber 20 is higher than the pressure in the refrigerant inflow chamber 1e, the refrigerant flowing into the on-off valve chamber 1f from the compression chamber 20 passes the on / off valve 30 through the inflow chamber communication path. Press it firmly to the (1g) side (lower side of FIG. 10). As a result, the inflow chamber communication path 1g is blocked by the on-off valve 30. Therefore, the refrigerant flowing into the open / close valve chamber 1f does not flow out from the inflow chamber communication path 1g into the refrigerant inflow chamber 1e.

That is, as in the case where the injection operation is performed, when the pressure of the refrigerant on the refrigerant inlet chamber 1e side is higher than the pressure of the refrigerant in the compression chamber 20, the opening / closing valve 30 is pushed toward the back plate 31 side. Raised, the open / close valve 30 is in an open state. Then, the injection refrigerant flows into the open / close valve chamber 1f from the inflow chamber communication path 1g, and flows into the compression chamber 20 through the compression chamber communication path 1h.

On the other hand, as in the case where the injection operation is not performed, when the pressure of the refrigerant on the refrigerant inlet chamber 1e side is lower than the pressure of the refrigerant in the compression chamber 20, the opening / closing valve 30 is the inlet chamber communication path 1g. Pressed firmly to the side, the on-off valve 30 is in a closed state. Therefore, the refrigerant flowing back from the compression chamber 20 and flowing into the open / close valve chamber 1f does not flow out from the inflow chamber communication path 1g into the refrigerant inflow chamber 1e.

That is, the open / close valve 30 has a pressure of the refrigerant at the refrigerant inlet chamber 1e side (inlet chamber communication path 1g) and a pressure of the refrigerant in the compression chamber 20 (compression chamber communication path 1h). It opens and closes by pressure difference between and.

Thereby, even when the injection operation is not performed, the refrigerant in the compression chamber 20 can be prevented from flowing back to the injection circuit.

In addition, when the opening / closing valve 30 is not provided, the refrigerant | coolant in the compression chamber 20 flows back to an injection circuit, and the volume from the compression chamber communication path 1h to the 2nd expansion valve 56 is compressed. It becomes the use volume in, and efficiency falls significantly. That is, by using the on-off valve 30, a use volume can be reduced significantly and compression efficiency can be improved.

In addition, even when the injection operation is performed, a case where the pressure of the refrigerant in the compression chamber 20 becomes excessively higher than the pressure of the refrigerant in the refrigerant inlet chamber 1e may occur. Even in this case, the coolant does not flow out into the injection circuit by the on-off valve 30 as in the case of not performing the injection operation.

Moreover, when it moves from the state in which injection operation is performed to the state in which injection operation is not performed, the pressure in refrigerant | coolant inflow chamber 1e will gradually fall. And when the pressure in the compression chamber 20 and the pressure in the refrigerant | coolant inflow chamber 1e become substantially the same pressure, the opening-closing valve 30 pushed up to the back plate 31 side (upper side of FIG. 9, 10) will be It comes down to the inflow chamber communication path 1g side (lower side of FIG. 9, 10) by gravity. And when the pressure in the compression chamber 20 becomes higher than the pressure in the refrigerant | coolant inflow chamber 1e, it opens and closes with the refrigerant which passed through the through-hole 30a from the compression chamber 20, and flowed into the opening / closing valve chamber 1f. The valve 30 is pressed tightly to the inflow chamber communication path 1g side (lower side of FIG. 9, 10).

That is, the open / close valve 30 operates only by a pressure difference and gravity, and operates without using any spring force, such as a coil spring, at all. Therefore, reliability is very high and it can make it low cost.

Here, the connection port with the inflow chamber communication path 1g and the connection port with the compression chamber communication path 1h were formed in the lower surface of the opening / closing valve chamber 1f. Therefore, as described above, when shifting from the state in which the injection operation is performed to the state in which the injection operation is not performed, in addition to the pressure difference, the opening / closing valve 30 is moved by the gravity to the inflow chamber communication path 1g side (Fig. It is easy to go down 9, 10). However, you may provide the connection port with the inflow chamber communication path 1g and the connection port with the compression chamber communication path 1h in the side surface or upper surface of the opening-closing valve chamber 1f. In this case, when switching to the state which does not perform injection operation, although the opening-closing valve 30 moves only by a pressure difference, you may support movement of the opening-closing valve 30 by a coil spring. That is, when the pressure in the compression chamber 20 and the pressure in the refrigerant inflow chamber 1e are almost the same pressure by the coil spring or the like, the opening / closing valve 30 is pressed in the inflow chamber communication path 1g side. Thus, the opening and closing valve 30 may be easily moved to the inflow chamber communication path 1g side when the transition from the state in which the injection operation is performed to the state in which the injection operation is not performed.

Moreover, even when the connection port with the inflow chamber communication path 1g and the connection port with the compression chamber communication path 1h are formed in the lower surface of the switching valve chamber 1f, between the opening-closing valve 30 and the back plate 31 A coil spring or the like may be provided to support the operation in which the open / close valve 30 descends to the inflow chamber communication path 1g side (lower side in FIGS. 9 and 10).

As described above, the inlet chamber communication path 1g in communication with the refrigerant inlet chamber 1e and the compression chamber communication path 1h in communication with the compression chamber 20 are provided on the same surface in the opening / closing valve chamber 1f. Therefore, the surface can be made flat and the on-off valve 30 can be made simple.

The manufacturing method of the scroll compressor 100 is demonstrated.

First, the fixed scroll 1, the rocking scroll 2, and the like are formed in the above-described shape.

In particular, with regard to the fixed scroll 1, a hole serving as the refrigerant inlet chamber 1e, two recesses, and an inflow chamber are formed in the vortex 1b and the large plate portion 1a of the fixed scroll 1. Machining is performed to form a hole to be the communication path 1g and a hole to be the compression chamber communication path 1h, and the opening / closing valve 30 is arranged at the formed recess, and the back plate 31 is attached. do. Further, in the large plate portion 1a of the fixed scroll 1, a hole serving as the refrigerant inflow chamber 1e, two recesses, a hole serving as an inflow chamber communication path 1g, and a compression chamber communication path 1h. Can be formed by performing a straight cutting process. Further, the spiral winding 1b, the hole serving as the refrigerant inlet chamber 1e, two recesses, the hole serving as the inlet chamber communication passage 1g, and the hole serving as the compression chamber communicating passage 1h are formed. The order of machining can be any order.

Next, as shown in FIG. 1, the subframe 6, the electric motor 5, the main shaft 7, the guide frame 4, and the compliant frame 10 are provided on the lower container 10a of the sealed container 10. 3) While arranging the old dam mechanism 8, the swinging scroll 2 is arranged to engage the main shaft 7. Furthermore, the fixed scroll 1 is arrange | positioned so that the compression chamber 20 may be formed between the oscillation scroll 2. Then, the injection pipe 41 is attached to the lower container 10a to be connected to the refrigerant inlet chamber 1e, and the suction pipe 42 is attached to the lower container 10a to be connected to the suction port of the compression chamber 20. The discharge pipe 43 is attached to the lower container 10a, and the upper container 10b is attached to the lower container 10a and sealed.

As a result, the scroll compressor 100 is manufactured.

As described above, according to the scroll compressor 100, it is possible to prevent backflow of the refrigerant during compression to the injection circuit and to expand the use volume in the compression process.

In particular, in the scroll compressor 100, a connection port to the opening / closing valve chamber 1f between the inflow chamber communicating passage 1g and the compression chamber communicating passage 1h is provided on the same side of the opening / closing valve chamber 1f, and the opening / closing valve is provided. 30 opens and closes by the pressure difference between the pressure on the inflow chamber communication path 1g side and the pressure on the compression chamber communication path 1h side. Therefore, the on-off valve 30 can move smoothly, can open and close, and can improve reliability. In addition, the on-off valve chamber 1f can be formed compactly. In addition, in the scroll compressor 100, opening and closing can be controlled by the pressure difference between the pressure in the compression chamber 20 and the pressure in the refrigerant inlet chamber 1e without using the coil spring. Compared with the on-off valve, the number of parts can be reduced.

In addition, in the scroll compressor 100, the coolant inflow chamber 1e, two recesses, the inflow chamber communication path 1g, and the compression chamber are only linearly with respect to the base plate 1a of the fixed scroll 1. The communication path 1h is formed, the on-off valve 30 is provided, the lid is covered with the back plate 31, and the on-off valve chamber 1f is formed. That is, in the scroll compressor 100, only the opening / closing valve 30 and the back plate 31 are provided through a straight hole. Therefore, for example, complicated processing, such as providing a groove of the refrigerant passage, is unnecessary for the valve seat portion of the on / off valve. Therefore, the processing time can be reduced.

Moreover, the coolant inflow chamber 1e is provided inward from the side of the base plate 1a of the fixed scroll 1. Therefore, since the injection pipe 41 may be attached to the side of the large plate part 1a of the fixed scroll 1, the injection pipe 41 can be attached to the lower container 10a. That is, it is not necessary to attach the injection pipe 41 to the upper container 10b. Therefore, the operation of attaching the upper container 10b to the lower container 10a is very easy.

In addition, since the injection pipe 41 may be attached to the side of the large plate part 1a of the fixed scroll 1, the injection pipe 41 is provided in the side of the airtight container 10. Therefore, the piping connected to the injection pipe 41 may be arrange | positioned at the side of the airtight container 10, and it is not necessary to arrange it in the upper side of the airtight container 10. FIG. Generally, when miniaturizing the heat pump apparatus provided with a compressor, there is no room in the space above and below the sealed container 10 in what is called an outdoor unit. Here, the scroll compressor 100 can save space on the upper side of the hermetic container 10 compared to the compressor which should arrange the pipe connected to the injection pipe 41 on the upper side of the hermetic container 10. The pump apparatus can be miniaturized.

Embodiment 2:

In Embodiment 2, the scroll compressor 100 using the open / close valve 32 comprised by the leaf spring is demonstrated.

11 is a longitudinal sectional view of the scroll compressor 100 according to the second embodiment. The scroll compressor 100 according to the second embodiment shown in FIG. 11 has a configuration different from that of the scroll compressor 100 according to the first embodiment shown in FIG. 1.

In the scroll compressor 100 according to the second embodiment, as described above, an on-off valve 32 formed of a leaf spring is used. The opening / closing valve 32 is provided so that 1g of inflow chamber communication paths may be covered.

As in the case where the injection operation is performed, when the pressure of the refrigerant on the refrigerant inlet chamber 1e side is higher than the pressure of the refrigerant in the compression chamber 20, the opening / closing valve 32 is pushed toward the back plate 33 side. . Then, the injection refrigerant flows into the open / close valve chamber 1f from the inflow chamber communication path 1g, and flows into the compression chamber 20 through the compression chamber communication path 1h.

On the other hand, when the pressure on the refrigerant inlet chamber 1e side is lower than the pressure in the compression chamber 20, such as when no injection operation is performed, the on-off valve 32 is pressed tightly to the inlet chamber communication path 1g side. . Therefore, the refrigerant flowing back from the compression chamber 20 and flowing into the open / close valve chamber 1f does not flow out from the inflow chamber communication path 1g into the refrigerant inflow chamber 1e.

In addition, when the open / close valve 32 comprised by the leaf spring is used, it is not necessary to provide the guide protrusion part 31a in the back plate 33 like the back plate 31 which concerns on Embodiment 1. Therefore, as shown in FIG. 11, the back plate 33 can be made into a simple structure.

As mentioned above, also with the scroll compressor 100 which concerns on Embodiment 2 using the on-off valve 32 comprised by the leaf spring, the same effect as the scroll compressor 100 which concerns on Embodiment 1 can be acquired.

The above is summarized as follows.

The scroll compressor according to the above embodiment is

In the sealed container, by disengaging the fixed scroll and the swinging scroll and rotating the swinging scroll without rotating the fixed scroll, the refrigerant compressed in the compression chamber formed by the plate-shaped vortex of both scrolls is discharged in the center of the fixed scroll. A scroll compressor capable of injecting a medium from the port into the discharge space on the rear of the fixed scroll and injecting a medium pressure refrigerant between the pressure of the refrigerant flowing into the compression chamber and the pressure of the refrigerant discharged from the compression chamber into the middle of the compression process. To

It has an on-off valve chamber for storing two on-off valves and two on-off valves in the middle of the refrigerant inflow chamber that passes through the interior from the side of the fixed scroll and enters the compression chamber through the compression chamber communication path. It is characterized by having one back plate.

Therefore, even when the injection circuit is not closed and the injection operation is performed, only a very small volume from the compression chamber communication to the opening / closing valve of the on-off valve chamber becomes a dead volume, and the compression efficiency can be improved.

In the above description, the scroll compressor 100 has been described as an example of the injection-compatible compressor. However, the injection-compatible compressor is not limited to this and other compressors may be used as long as the compressor has an injection mechanism such as a rotary compressor.

In the above description, an example in which the coolant inflow chamber 1e, the open / close valve chamber 1f, and the like are provided in the large plate portion 1a of the fixed scroll 1 in the scroll compressor 100 has been described. However, the present invention is not limited thereto, and the coolant inlet chamber 1e, the open / close valve chamber 1f, and the like may be provided separately from the large plate portion 1a of the fixed scroll 1.

1: fixed scroll 1a: large part
1b: Wawonchi 1c: Oldham Information Home
1d: discharge port 1e: refrigerant inlet chamber
1f: on-off valve chamber 1g: inflow chamber communication path
1h: Compression chamber communication path 2: Oscillation scroll
2a: large scale part 2b: vortex
2c: rocking bearing 2d: thrust surface
2e: Oldham guide groove 2f: Boss
2j: additional hole 2k: lower opening
3: compliant frame 3a: thrust bearing
3c: spindle support 3d: phase fitting cylindrical surface
3e: Lower fitting cylindrical surface 3h: Auxiliary spindle support
3m: Medium pressure adjustment spring 3n: Communication hole
3p: adjusting valve space 3s: communication hole
3t: valve 3u: phase opening
3x: Reciprocating sliding part 3y: Pressing valve
4: guide frame 4a: phase fitting cylindrical surface
4b: lower fitting cylindrical surface 5: electric motor
5a: Rotor 5b: Stator
6: subframe 6a: support
7: spindle 7b: rocking shaft
7c: main shaft portion 7d: minor shaft portion
7f: oil pipe 7g: high pressure oil supply hole
8: Oldham mechanism 10: airtight container
10a: lower container 10b: upper container
15a: boss part space 15b: boss part outer space
15e: valve outer diameter space 15c: plate outer diameter space
15d: frame space 20: compression chamber
30, 32: on-off valve 30a: through hole
30b: guide hole 31, 33: back plate
31a: guide protrusion 34: bolt
41: injection pipe 42: suction pipe
43: discharge pipe 51: compressor
52, 57: heat exchanger 53: first expansion valve
54: internal heat exchanger 55: third expansion valve
56 second expansion valve 58 four-way valve
59: receiver 100: scroll compressor

Claims (15)

A main refrigerant circuit in which a compressor, a radiator, a first expansion valve, and an evaporator are sequentially connected;
An injection circuit provided between the radiator of the main refrigerant circuit and the first expansion valve, the injection pipe provided in the compressor, and provided with a second expansion valve;
If the opening degree of the second expansion valve decreases, the flow path from the injection pipe of the compressor to the compression chamber is closed; if the opening degree of the second expansion valve increases, the flow path from the injection pipe of the compressor to the compression chamber The heat pump apparatus characterized by providing a mechanism for opening the. The method of claim 1,
And the mechanism operates with a pressure difference between the refrigerant flowing through the main refrigerant circuit and the refrigerant flowing through the injection circuit. The method of claim 1,
The apparatus,
A coolant inlet chamber provided in the middle of the flow path and into which a coolant flows from the injection circuit through the injection pipe;
An opening / closing valve chamber provided between the coolant inlet chamber and the compression chamber in the flow path and connected to the coolant inlet chamber and the compression chamber, wherein a connection port of the refrigerant inlet chamber and a connection port of the compression chamber are formed in the same surface of the chamber, And an on / off valve chamber provided with an on / off valve for opening and closing a connection port with the refrigerant inlet chamber due to a pressure difference between the refrigerant on the refrigerant inlet chamber side and the refrigerant on the compression chamber side. A compression unit which forms a compression chamber and compresses the suction refrigerant having the suction pressure sucked into the compression chamber to the discharge pressure;
In the compression chamber formed by the compression section, provided with a refrigerant injection unit for injecting the injection refrigerant into the intermediate pressure portion, the suction refrigerant is an intermediate pressure higher than the suction pressure and lower than the discharge pressure,
The refrigerant injection unit,
A refrigerant inflow chamber into which the injection refrigerant flows from the outside;
An open / close valve chamber connected to the refrigerant inlet chamber and the intermediate pressure portion of the compression chamber, wherein a connection port between the refrigerant inlet chamber and a connection port between the intermediate pressure portion is formed in the same surface in the chamber, and the refrigerant on the refrigerant inlet chamber side and the intermediate pressure portion are formed. And an on / off valve chamber provided with an on / off valve for opening and closing a connection port with the refrigerant inlet chamber due to a pressure difference between the refrigerant on the side. The method of claim 4, wherein
The on-off valve is a plate-shaped member provided to be movable in the on-off valve chamber in a predetermined direction of movement. When the connection port with the refrigerant inlet chamber is closed, a hole is formed at a position overlapping the connection port with the intermediate pressure portion. An injection-compatible compressor, which is a plate-shaped member formed. 6. The method of claim 5,
A guide hole is formed in the open / close valve, and a guide rod provided in the open / close valve chamber and extended in the moving direction is provided through the guide hole. The method of claim 6,
The opening / closing valve chamber is formed in a cylindrical shape in which a connection port between the refrigerant inlet chamber and a connection port between the intermediate pressure portion is formed on a bottom surface thereof.
The opening / closing valve is a circular plate-shaped member having the guide hole formed therein, wherein the guide rod is provided so as not to rotate about the guide rod by engaging with the guide hole. The method of claim 6,
The opening / closing valve chamber is formed in a cylindrical shape in which a connection port between the refrigerant inlet chamber and a connection port between the intermediate pressure portion is formed on a bottom surface thereof.
The said on-off valve is circular of diameter smaller than the circle | round | yen of the bottom face of the said on-off valve chamber, The injection compatible compressor characterized by the formation of the guide hole of the same shape in substantially the same dimension as the outer periphery of the said guide rod. The method of claim 4, wherein
The on-off valve is an injection compatible compressor, characterized in that the leaf spring. The method of claim 4, wherein
The compression unit has a swinging scroll having a swinging vortex formed on the upper surface side of the swinging base, and a fixed scroll formed on the lower surface side of the stationary base with a fixed vortex that is engaged with the swinging vortex of the swinging scroll to form the compression chamber.
The coolant inflow chamber is a room formed inside from the side of the fixed base plate,
The opening and closing valve chamber is a chamber formed on the upper surface side of the fixed base plate. The method of claim 10,
The said opening-closing valve chamber is an injection | compression-responsive compressor characterized by the above-mentioned opening formed in the upper surface side of the said fixed base board which covered the lid by the back plate. The method of claim 10,
The compression unit forms a compression chamber in which the swinging vortex of the rocking scroll and the fixed vortex of the fixed scroll are engaged to form a pair,
The opening / closing valve chamber is provided corresponding to each compression chamber of the pair of compression chambers. The method of claim 4, wherein
The injection-compatible compressor is also,
A hermetically sealed container accommodating the compression part and the refrigerant injection part therein;
And an injection pipe provided through a side portion of the sealed container and configured to introduce the injection refrigerant into the refrigerant inlet chamber from the outside. The method of claim 13,
The closed container has a lower container and an upper container which forms a sealed space therein in combination with the lower container,
The injection pipe is injection-compressor, characterized in that provided through the side of the lower container. A swinging winding is formed on one side of the swinging slab,
Form a fixed spiral wound on one side of the fixed base plate,
A side hole is formed in the side of the fixing base;
On the other side of the fixed base plate, a recess is formed,
A first communication hole for communicating the bottom surface of the trench and the side hole, and a second communication hole for communicating the bottom surface of the trench and the one side side of the fixing base, and being formed in the fixing base,
An opening / closing valve for opening / closing the first communication hole is disposed at the indentation formed in the fixed base plate,
Attaching the back plate to the fixed base plate so as to close the opening of the pit where the on-off valve is disposed;
The swinging base on which the swinging winding is formed is placed in a sealed container,
The fixed base formed with the fixed vortex is disposed in the hermetically sealed container so as to form a compression chamber by engaging the fixed vortex with the swing vortex.
A suction pipe for introducing suction refrigerant into the compression chamber from the outside of the sealed container to a suction port of the compression chamber,
And an injection pipe for introducing an injection refrigerant into the side hole from the outside of the sealed container to the side hole.

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