JP7139446B2 - integrated valve - Google Patents

Description

The present disclosure is incorporated in a heat pump cycle having an indoor condenser, an outdoor evaporator, and a compressor, separates the refrigerant from the indoor condenser into gas and liquid, and switches whether or not the gaseous refrigerant flows out to the compressor, thereby performing the heat cycle. It relates to an integrated valve for switching heating modes.

A conventional integrated valve has a metal body, a valve opening that opens and closes in the middle of a flow path penetrating the body, and an orifice that communicates the upstream side and the downstream side of the valve opening in the body. A formed one is known (see, for example, Patent Document 1).

Patent No. 5772764 (paragraph [0010], Fig. 4)

In the above-described conventional integrated valve, since the orifice is formed by drilling it deep inside the flow path of the body, there is a problem that it is difficult to form the orifice.

The invention of claim 1 made to solve the above problems is integrated into a heat pump cycle having an indoor condenser, an outdoor evaporator, and a compressor, and switching the heat pump cycle between a normal indoor heating mode and a special indoor heating mode. A valve, comprising: a support base; a gas-liquid separation chamber formed in the support base for taking in a refrigerant, separating the gas from the liquid, and discharging the gaseous refrigerant and the liquid refrigerant separately; A first flow path for taking in the refrigerant, which extends from the chamber and has an indoor condenser port connected to the indoor condenser at its end, and an outdoor evaporator which extends from the gas-liquid separation chamber and has an end connected to the outdoor evaporator. a second flow path for the liquid refrigerant having a port; and a third flow path for the gaseous refrigerant having a compressor port extending from the gas-liquid separation chamber and distally connected to an input port of the compressor. and an open valve provided in the middle of the third flow path, which is normally in a closed state that blocks the third flow path, and opens the third flow path according to the pressure of the second flow path. A differential pressure valve that is in a valve state, and a drive valve that is provided in the middle of the second flow path and is driven to be in an open state in the normal room heating mode and to be in a closed state in the special room heating mode. a heat insulating member formed of a material having a lower thermal conductivity than that of the support base, assembled inside the support base, and through which a part of the second flow path penetrates; The integrated valve is provided with an orifice that communicates between the upstream side and the downstream side of the valve opening that is opened and closed by the driven valve in the two flow paths.

1 is a conceptual diagram of a heat pump cycle incorporating an integrated valve according to a first embodiment of the present disclosure; FIG. Front perspective view of integrated valve Rear perspective view of integrated valve Front sectional view of the integrated valve when the solenoid valve is open Front sectional view of the integrated valve when the solenoid valve is closed Perspective view of heat insulating member BB cross-sectional view of the lower base and heat insulating member Side view of the insulation member assembled to the lower base

[First embodiment]
The valve 10 of this embodiment will be described below with reference to FIGS. As shown in FIG. 1, the integrated valve 10 of the present embodiment is incorporated in, for example, a heat pump cycle 80 of an air conditioner of an electric vehicle or a hybrid vehicle that runs with the driving force of a motor. The heat pump cycle 80 can be switched between a heating mode for heating the interior of the vehicle, a cooling mode for cooling the interior of the vehicle, and the like.

The integrated valve 10 has an inflow port 13 into which the refrigerant flows and two outflow ports 14 and 15 from which the refrigerant flows out. As will be described later, the integrated valve 10 has a gas-liquid separation chamber 12 therein and separates the refrigerant from the inflow port 13 into gas and liquid. The integrated valve 10 allows the gaseous refrigerant and the liquid refrigerant obtained by the gas-liquid separation to flow out from the gas phase outflow port 14 and the liquid phase outflow port 15, respectively. In addition, the integrated valve 10 includes a drive valve 50 (an electromagnetic valve in the example of the present embodiment) inside, and by opening and closing the drive valve 50, the gas phase outflow port 14 can be opened and closed. .

Before describing the details of the integrated valve 10, the heat pump cycle 80 will be described first. The heat pump cycle 80 includes, for example, a compressor 81 and an outdoor heat exchanger 83 (outdoor evaporator) arranged in the bonnet, an indoor condenser 82 and an indoor evaporator 84 arranged in the passenger compartment, and the like.

The compressor 81 sucks refrigerant, compresses it, and discharges it. The compressor 81 is provided with a low-pressure input port 81A for sucking the low-pressure refrigerant, an intermediate-pressure input port 81B for joining the refrigerant in the process of compressing from low pressure to high pressure, and an output port 81C for discharging the compressed refrigerant to the indoor condenser 82. is provided.

The outdoor heat exchanger 83 exchanges heat between the outside air and the refrigerant flowing inside the outdoor heat exchanger 83 . The outdoor heat exchanger 83 functions as an evaporator (outdoor evaporator) that absorbs heat and evaporates the refrigerant when the heat pump cycle 90 is in the heating mode, and functions as a radiator that dissipates heat from the refrigerant when the heat pump cycle 90 is in the cooling mode. Function.

The indoor condenser 82 is arranged in the air-conditioning unit in the passenger compartment, and functions as a radiator that dissipates heat from the high-temperature, high-pressure refrigerant discharged from the compressor 81 (heats the passenger compartment). In the cooling mode, the indoor condenser 82 is covered with a cover, for example. Also, the indoor evaporator 84 is used in the cooling mode, and absorbs heat from the air in the passenger compartment (cools the passenger compartment).

The inflow port 13 of the integrated valve 10 is connected through an expansion valve 87 to the output port 82B of the indoor condenser 82 . The gas-phase outflow port 14 of the integrated valve 10 is connected to an intermediate pressure input port 81B, which is one of the two input ports of the compressor 81 . The liquid-phase outflow port 15 of the integrated valve 10 is connected to the input port of the outdoor heat exchanger 83 .

An input port of an indoor evaporator 84 is connected to an output port of the outdoor heat exchanger 83 via an expansion valve 85 . Also, the output port of the indoor evaporator 84 is connected to the low pressure input port 81A of the compressor 81 . An on-off valve 86 is connected in parallel with the indoor evaporator 84 between the output port of the outdoor heat exchanger 83 and the low-pressure input port 81A of the compressor 81 . In the heating mode, the on-off valve 86 is opened and the expansion valve 85 is closed, while in the cooling mode, the on-off valve 86 is closed and the expansion valve 85 is open ( That is, the refrigerant flows through the indoor evaporator 84).

In the heat pump cycle 80, a normal indoor heating mode (hereinafter referred to as normal heating mode) and a special indoor heating mode (hereinafter referred to as special heating mode) are provided as heating modes. In the normal heating mode, the driven valve 50 of the integrated valve 10 is opened, thereby closing the gas-phase outflow port 14 of the integrated valve 10 (FIG. 1(A)). Here, in the special heating mode, the drive valve 50 of the integrated valve is closed. As a result, the special inflow passage 89 from the gas phase outflow port 14 of the integrated valve 10 to the intermediate pressure input port 81B of the compressor 81 is opened (FIG. 1(B)). The heat pump cycle 80 functions as a gas injection cycle, and can easily warm the vehicle interior even when the outside air temperature is low and the vehicle interior is difficult to warm in the normal heating mode.

More specifically, in the normal heating mode, when the outdoor temperature is extremely low, the outdoor evaporator (outdoor heat exchanger 83) cannot sufficiently absorb heat from the outdoor air. Therefore, it is considered that the pressure of the refrigerant in the flow path from the outdoor heat exchanger 83 to the compressor 81 does not rise and the flow rate of the refrigerant decreases. If the flow rate of the refrigerant decreases, the discharge pressure and temperature of the refrigerant from the compressor 81 will not increase, heat radiation from the indoor condenser 82 will decrease, and the heating capacity will decrease. On the other hand, in the special heating mode, the refrigerant before flowing into the outdoor heat exchanger 83 is gas-liquid separated by the gas injection cycle, and the separated gaseous refrigerant is returned to the compressor 81 . As a result, the refrigerant before the pressure is reduced in the outdoor heat exchanger 83 is added to the compressor 81, so it is thought that the reduction in the discharge pressure of the refrigerant from the compressor 81 can be suppressed. As a result, it is considered possible to improve the heating performance. Details of the heat pump cycle 80 are also disclosed in, for example, Japanese Patent No. 5772764 and Japanese Patent Application Laid-Open No. 2017-53591.

Next, details of the integrated valve 10 will be described. As shown in FIGS. 2 and 3, the integrated valve 10 has a vertically long support base 11 made of metal, for example, and has a plurality of flow paths inside the support base 11 . The integrated valve 10 of the present embodiment is arranged such that the longitudinal direction of the support base 11 is the vertical direction during use (that is, when the integrated valve 10 is installed in a vehicle). Hereinafter, in the support base 11, when the integrated valve 10 is used, the surface facing upward is referred to as the upper surface, and the surface facing downward is referred to as the lower surface. In FIG. 4, the surface of the support base 11 that faces the front is called the front surface, the surface that faces the back of the paper is called the rear surface, and the surfaces of the support base 11 that face the left and right sides are called the left surface and the right surface, respectively. do.

As shown in FIG. 4, the gas-liquid separation chamber 12 described above is provided inside the support base 11 . The gas-liquid separation chamber 12 is a columnar chamber extending vertically, and a cylindrical body 12A hangs down from the ceiling coaxially with the central axis. An inflow port 13 communicates with the upper portion of the inner peripheral surface of the gas-liquid separation chamber 12 .

The gas-liquid separation chamber 12 is of a centrifugal separation type, and the refrigerant from the indoor condenser 82 flowing from the inflow port 13 swirls along the inner peripheral surface of the gas-liquid separation chamber 12, and the centrifugal force caused by this swirl The refrigerant is separated into gaseous refrigerant and liquid refrigerant. The separated gaseous refrigerant passes through the inside of the cylindrical body 12A and heads upward, and the separated liquid refrigerant drops downward in the gas-liquid separation chamber 12. As shown in FIG.

A first straight hole portion 21 and a second straight hole portion 31 extending parallel to each other are formed on the lower side and the upper side of the gas-liquid separation chamber 12 . The first straight hole portion 21 extends from the right surface of the support base 11 to a position closer to the left surface, and the left end portion of the first straight hole portion 21 extends from the front surface of the support base 11 and serves as the liquid phase outflow port 15 described above. are in communication. A right end portion of the first straight hole portion 21 serves as a first valve attachment portion closed by a support body 53 of the driven valve 50 . The driven valve 50 includes a valve body 51 that directly moves in the left-right direction, and opens and closes a valve port 62 provided in the middle of the first straight hole portion 21 by the valve body 51 . The driven valve 50 is in the open state away from the valve port 62 in the operating state, and in the non-operating state is in the closed state by being placed on the opening edge of the valve port 62 (that is, the valve seat 62Z).

The second straight hole portion 31 extends from the left surface of the support base 11 to a position close to the right surface, and the right end portion of the second straight hole portion 31 extends to the rear surface of the support base 11 and serves as the gas phase outflow port 14 described above. are in communication. A middle portion of the second straight hole portion 31 is communicated with an inner portion of the cylindrical body 12A of the gas-liquid separation chamber 12 by a communication hole 32 . A left end portion of the second straight hole portion 31 is closed with a support cap 44 that supports a compression coil spring 42 provided in the differential pressure valve 40 . A valve body 41 provided in the differential pressure valve 40 opens and closes a valve port 43 provided in the middle of the second straight hole portion 31 from the left side. A compression coil spring 42 biases the valve body 41 to a closed state.

The left portion of the first straight hole portion 21 and the left end portion of the second straight hole portion 31 communicate with each other through an internal pressure introduction passage 19 .

As shown in FIG. 4 , the support base 11 is provided with a bottom wall 39 that partitions the gas-liquid separation chamber 12 and the first straight hole 21 . The bottom wall 39 is penetrated by a communication hole 34 that extends vertically and connects the gas-liquid separation chamber 12 and the first straight hole portion 21 . Specifically, an enlarged diameter portion 23 is provided in a portion of the first straight hole portion 21 that is arranged directly below the gas-liquid separation chamber 12 . A lower end of a communication hole 34 opens into the enlarged diameter portion 23 .

Here, a cylindrical heat insulating member 60 is fitted in the first straight hole portion 21 (see FIG. 6). The heat insulating member 60 is made of a material having a lower thermal conductivity than the support base 11, and is a resin injection molded product in the example of the present embodiment. The heat insulating member 60 is fitted in the left end portion of the first straight hole portion 21, and an axially intermediate portion of the heat insulating member 60 is sealed with an O-ring 60R. A right end portion of the heat insulating member 60 is disposed within the enlarged diameter portion 23 with a gap from the inner surface of the enlarged diameter portion 23 . A right end opening of the heat insulating member 60 constitutes a valve port 62 that is opened and closed by the driven valve 50 . The opening edge of the valve port 62 of the heat insulating member 60 forms a valve seat 62Z against which the valve body 51 of the driven valve 50 abuts. The left end surface of the heat insulating member 60 abuts against the left end of the first straight hole portion 21 , and the engaging protrusion 64 provided on a part of the left end surface of the heat insulating member 60 in the circumferential direction engages the first straight hole portion 21 . is engaged with the engaging recess 24 (corresponding to the “positioning portion” described in the claims) on the left end of the heat insulating member 60 in the axial direction. Thereby, the heat insulating member 60 is prevented from rotating with respect to the support base 11 . Specifically, the heat insulating member 60 is prevented from rotating at a position where the through hole 67 passing through the outer peripheral wall of the heat insulating member 60 communicates with the liquid phase outflow port 15 . At this position, the internal pressure introduction passage 19 is arranged on the extension of a later-described discharge hole 65 that penetrates the outer peripheral wall of the heat insulating member 60 so as to be perpendicular to the through hole 67 . In addition, in this embodiment, the engaging protrusion 64 and the engaging recess 24 correspond to the "first positioning engaging portion" described in the claims.

As shown in FIGS. 4 and 7, the heat insulating member 60 is formed with an orifice 61 radially communicating between the inside and the outside. The orifice 61 is narrowed toward the inside of the heat insulating member 60. - 特許庁Specifically, the orifice 61 is provided at the right end portion of the heat insulating member 60 that is spaced apart from the inner surface of the first straight hole portion 21 (with the inner surface of the enlarged diameter portion 23). The orifice 61 extends upward from a portion of the outer peripheral surface of the heat insulating member 60 that is located on the lower side. In addition, the orifice 61 is arranged at a position away from the junction of the first straight hole 21 with the gas-liquid separation chamber 12 in the axial direction of the first straight hole 21 (to the left in FIG. 4). . Although the orifice 61 is orthogonal to the axial direction of the heat insulating member 60 in this embodiment, it may be inclined. For example, the orifice 61 may extend closer to the interior of the insulating member 60 toward the downstream side.

As shown in FIG. 7, the upper surface of the bottom wall 39 is provided with a first engaging hole 33A and a second engaging hole 33B in addition to the communication hole 34. As shown in FIG. An umbrella-shaped cover member 70 is attached to the first engaging hole 33A. Specifically, the umbrella-shaped cover member 70 has an insertion bar 70B suspended from an umbrella portion 70A. The insertion bar 70B is, for example, press-fitted into the second engagement hole 33B. At this time, the umbrella portion 70A is arranged so as to cover the communicating hole 34 and the second engaging hole 33B from above.

The second engagement hole 33B faces a portion of the outer peripheral surface of the end portion of the heat insulating member 60 that is opposite to the orifice 61 in the circumferential direction. A regulation bar 72 is inserted into the second engagement hole 33B. The upper end portion of the restriction bar 72 contacts the lower surface of the head portion 70A and is restricted from moving. The lower end of the regulating bar 72 engages with an engaging recess 63 formed in the outer peripheral surface of the end of the heat insulating member 60 to prevent the heat insulating member 60 from rotating, and the heat insulating member 60 is supported by the support base. 11 (more specifically, a lower base 20B, which will be described later). In this embodiment, the restricting bar 72 and the engaging recess 63 constitute a "second positioning engaging portion" described in the claims.

As shown in FIG. 8, the regulation bar 72 in contact with the heat insulating member 60 is visible when the drive valve 50 is removed from the opening of the first straight hole 21 provided on the right side of the support base 11. It's becoming This makes it easy to confirm whether or not the heat insulating member 60 is positioned by the regulating bar 72 .

As shown in FIG. 7 , the integrated valve 10 is provided with a discharge hole 65 that penetrates inside and outside a portion (left portion) of the heat insulating member 60 downstream of the orifice 61 . Further, between the outer peripheral surface of the heat insulating member 60 and the inner peripheral surface of the first straight hole portion 21, while being separated from the upstream side of the O-ring 60R, the liquid phase outflow port 15 and the discharge hole An annular channel 66 (corresponding to a "curved channel" described in the claims) communicating with 65 is formed. The annular flow path 66 communicates with the internal pressure introduction path 19 . Specifically, as shown in FIG. 6 , an annular recess 66U for forming an annular flow path 66 is formed in the outer peripheral surface of the heat insulating member 60 . Note that the annular flow path 66 may be C-shaped.

The support base 11 is formed by vertically connecting an upper base 20A and a lower base 20B. The lower base has a substantially rectangular parallelepiped shape, and a driven valve 50 is attached to the right side. As shown in FIG. 2, the above-described liquid-phase outflow port 15 opens in the front surface of the lower base 20B. As shown in FIG. 3, the upper base 20A has a rectangular block shape when viewed from the front. It is open. The gas-liquid separation chamber 12 is arranged at the boundary between the upper base 20A and the lower base 20B. is constituted by the bottom wall 39 .

In this embodiment, for example, the heat insulating member 60 is mounted within the lower base 20B prior to joining the lower base 20B and the upper base 20A together. Specifically, it is inserted from one end opening of the first straight hole portion 21 of the lower base 20B before the drive valve 50 is attached, is fitted into the first straight hole portion 21, and is engaged with the heat insulating member 60. The projection 64 and the engaging recess 24 of the first straight hole 21 are engaged with each other. Then, the restriction bar 72 is inserted through the upper opening 30A of the lower base 20B and the second engagement hole 33B of the bottom wall 39 to engage with the engagement recess 63 of the heat insulating member 60. As shown in FIG. After that, the umbrella-shaped cover member 70 is inserted through the first engagement hole 33A and comes into contact with the upper end portion of the regulation bar 72 . Thereby, the heat insulating member 60 is attached to the lower base 20B.

In the integrated valve 10 of this embodiment, the differential pressure valve 40 that opens and closes the gas phase outflow port 14 operates as follows. When the heat pump cycle 80 is in the normal heating mode, the valve opening 62 is opened when the driven valve 50 is driven to the open state as shown in FIG. In this case, the pressure in the second straight hole portion 31 passing through the communication hole 32 is It is considered that the force is not strong enough to move the valve body 41 to the valve open position, and the valve body 41 urged by the compression coil spring 42 is maintained so that the valve port 43 is in the closed state. Therefore, when the heat pump cycle 80 is in the normal heating mode, the gas phase outflow port 14 of the integrated valve 10 is closed, and the liquid refrigerant flows out only from the liquid phase outflow port 15 . Here, when the heat pump cycle 80 is switched to the special heating mode, the drive valve 50 is driven to the closed state to block the valve port 62 (see FIG. 5). The liquid refrigerant separated in the gas-liquid separation chamber 12 flows down from the gas-liquid separation chamber 12 into the enlarged diameter portion 23 of the first straight hole portion 21 and then passes through the orifice 61 to the inside of the heat insulating member 60. flow into the part. At this time, the liquid refrigerant is decompressed. Then, the back pressure of the valve body 41 of the differential pressure valve 40 becomes equal to the pressure inside the first straight hole portion 21 by the internal pressure introducing passage 19 . When the pressure in the communication hole 32 becomes higher than the back pressure of the valve body 41, the valve body 41 opens the valve port 43 as shown in FIG. As a result, gaseous refrigerant flows out from the gas-phase outflow port 14 and flows into the compressor 81 . This constitutes a gas injection cycle. Details of the differential pressure valve 40 are also disclosed in, for example, Japanese Patent Application Laid-Open No. 2017-53591.

In this embodiment, the inflow port 13, the liquid phase outflow port 15, and the gas phase outflow port 14 are the "indoor condenser port," the "outdoor evaporator port," and the "compressor port," respectively. Equivalent to "port for Further, the inflow port 13 constitutes the "first flow path" described in the claims. Further, the communication hole 34, the enlarged diameter portion 23 of the first straight hole portion 21, the inside of the heat insulating member 60, and the liquid phase outflow port 15 constitute the "second flow path" described in the claims. Further, the communicating hole 32, the second straight hole portion 31, and the gas-phase outflow port 14 constitute the "third flow path" described in the claims.

In the present disclosure, “parallel” means not only a strictly parallel state but also a substantially parallel state (for example, a state of being inclined with respect to each other at an angle of 5 degrees or less). Moreover, "perpendicular" means not only intersecting at exactly 90 degrees, but also substantially intersecting (for example, intersecting at an angle of 85 degrees or more and 95 degrees or less).

The structure of the integrated valve 10 of this embodiment is as described above. In this embodiment, since the orifice 61 is formed in the member assembled inside the support base 11, it is easier to form the orifice 61 than in the case where the orifice 61 is directly formed inside the support base 11. It becomes possible. In the present embodiment, the member in which the orifice 61 is formed is cylindrical, and the orifice 61 is formed in the radial direction thereof, making it easier to form the orifice 61 .

Further, since the member provided with the orifice 61 is a heat insulating member, the density of the refrigerant passing through the orifice 61 is less likely to change due to external heat, and the flow rate of the refrigerant passing through the orifice 61 can be stabilized. Become. Here, the liquid refrigerant that has been separated from gas and liquid does not necessarily include only completely liquid refrigerant, and may also include gaseous refrigerant that cannot be completely separated. In this case, when the slip ratio (velocity of gas refrigerant/velocity of liquid refrigerant), which is the speed ratio between the gas refrigerant and the liquid refrigerant in the liquid refrigerant, increases, the density of the refrigerant passing through the orifice 61 is affected by the temperature. etc., and the flow rate of the refrigerant passing through the orifice 61 is unstable. In contrast, in the integrated valve 10 of the present embodiment, the orifice 61 penetrates the heat insulating member 60 in the radial direction, so that the liquid refrigerant flowing through the first straight hole portion 21 enters the orifice 61. When you do, you will change direction. As a result, the gas refrigerant and the liquid refrigerant in the liquid refrigerant can be easily agitated, and an increase in the slip ratio can be suppressed.

Moreover, in this embodiment, the orifice 61 penetrates the heat insulating member 60 from the bottom to the top. Therefore, even when the amount of the liquid refrigerant separated in the gas-liquid separation chamber 12 is small, the liquid refrigerant can easily pass through the orifice 61 compared to the configuration in which the orifice 61 is provided in the upper portion of the heat insulating member 60. It becomes possible.

[Other embodiments]
(1) In the above embodiment, the heat insulating member 60 has a cylindrical shape. may

(2) In the above embodiment, the umbrella-shaped cover member 70 is separate from the regulation bar 72, but they may be integrated.

10 integrated valve 11 support base 60 heat insulating member 61 orifice 80 heat pump cycle

Claims (13)

An integrated valve incorporated in a heat pump cycle having an indoor condenser, an outdoor evaporator, and a compressor to switch the heat pump cycle between a normal indoor heating mode and a special indoor heating mode,
a support base;
a gas-liquid separation chamber formed in the support base for taking in a refrigerant, separating the gas from the liquid, and discharging the gaseous refrigerant and the liquid refrigerant separately;
a first flow path for taking in the refrigerant, which extends from the gas-liquid separation chamber and has an indoor condenser port connected to the indoor condenser at its end;
a second flow path for the liquid refrigerant extending from the gas-liquid separation chamber and having an outdoor evaporator port connected to the outdoor evaporator at its terminal end;
a third flow path for the gaseous refrigerant extending from the gas-liquid separation chamber and having a compressor port at its distal end connected to an input port of the compressor;
It is provided in the middle of the third flow path, and is normally in a closed state that blocks the third flow path, and is in an open state that opens the third flow path according to the pressure in the second flow path. a differential pressure valve,
a driven valve provided in the middle of the second flow path and driven so as to be open in the normal indoor heating mode and closed in the special indoor heating mode;
a heat insulating member formed of a material having a lower thermal conductivity than the support base, assembled inside the support base, and through which a part of the second flow path penetrates;
an orifice that is formed in the heat insulating member and communicates between an upstream side and a downstream side of a valve opening of the second flow path that is opened and closed by the driven valve. A one-end opening of the portion of the second flow path that penetrates the heat insulating member forms a valve opening that is opened and closed by the valve element of the driven valve, and an opening edge of the one-end opening is formed by the valve element of the driven valve. 2. The integrated valve of claim 1, wherein the integrated valve is an abutting valve seat. The support base is arranged to extend laterally below the gas-liquid separation chamber when the integrated valve is in use, and one end constitutes a part of the second flow path, and one end is the drive valve. forming a first straight hole forming a first valve mounting portion closed by a support body of the valve and forming a positioning portion with the other end closed or reduced in diameter;
3. The integrated valve according to claim 2, wherein said heat insulating member is fitted into said first straight hole and has an end opposite to said valve seat positioned by said positioning portion. The heat insulating member has a tubular shape,
4. The integrated valve according to claim 3, wherein said orifice is formed to communicate between the inner surface and the outer surface of said heat insulating member. 5. The integrated valve according to claim 4, wherein said orifice is arranged at a position separated in the axial direction of said first straight hole from a junction with said gas-liquid separation chamber in said first straight hole. 6. The integrated valve according to claim 4 or 5, wherein the orifice is arranged such that the refrigerant passes through the outside and inside of the heat insulating member toward the upper side when the integrated valve is used. 7. Any one of claims 4 to 6, further comprising a first positioning engaging portion formed on said positioning portion and said heat insulating member, and engaged with projections and depressions in the axial direction of said heat insulating member to prevent rotation of said heat insulating member. or 1. The integrated valve according to claim 1. a communicating hole, a first engaging hole, and a second engaging hole that partition the gas-liquid separation chamber and the first straight hole portion and communicate between the gas-liquid separation chamber and the first straight hole portion; a bottom wall having a hole;
An insertion bar hangs down from a head covering the communication hole and the second engagement hole from above when the integrated valve is used, and the insertion bar is inserted into the first engagement hole and attached to the bottom wall. a fixed umbrella-shaped cover member;
It passes through the second engagement hole and is restricted from upward movement by the umbrella portion when the integrated valve is in use. 8. The integrated valve according to any one of claims 4 to 7, further comprising a movement restriction bar that restricts movement of the . 2. A second positioning engaging portion for preventing rotation of said heat insulating member from said lower end portion of said movement restricting bar and a recess formed in said heat insulating member and engaging said lower end portion of said movement restricting bar. 9. The integrated valve according to 8. 10. The integrated valve according to claim 8 or 9, wherein the lower end portion of the movement restricting bar becomes visible when the support body of the driven valve is removed from the first valve mounting portion. The support base is formed with a second straight hole portion extending parallel to the first straight hole portion above the gas-liquid separation chamber when the integrated valve is used,
one end of the second straight hole on the side of the first valve mounting portion from the gas-liquid separation chamber constitutes at least a part of the third flow path,
The integrated valve according to any one of claims 3 to 10, wherein the other end of the second straight hole is closed with a support cap that supports a biasing member provided in the differential pressure valve. . a discharge hole penetrating inside and outside a portion of the heat insulating member downstream of the orifice;
is formed between the outer peripheral surface of the heat insulating member and the inner peripheral surface of the first straight hole portion, is cut off from the upstream portion of the second flow path from the valve port, and is connected to the outdoor evaporator port and the a curved channel that communicates with the discharge hole and forms part of the second channel;
12. The integrated valve according to any one of claims 3 to 11, further comprising an internal pressure introducing path that communicates with the curved flow path and introduces the internal pressure of the second flow path into the differential pressure valve. The discharge hole is arranged to face upward when the integrated valve is used, and penetrates from the inside to the outside of the heat insulating member,
The internal pressure introduction path is arranged to extend upward from the curved flow path when the integrated valve is used,
13. The integrated valve according to claim 12, wherein the outdoor evaporator port is arranged on the side of the curved flow path.

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