WO2017187505A1 - Rotary flow path opening/closing valve - Google Patents

Abstract

Provided is a rotary flow path opening/closing valve which is capable of using one element to switch a refrigerant flow path to a plurality of patterns, and which has low power consumption. This rotary flow path opening/closing valve is provided with: a cylindrical valve body which is provided with a plurality of first openings, and in which a refrigerant circulates; a plurality of conduit lines which are formed inside the cylindrical valve body, and which each have both ends connected to the first openings; a valve body outer circumference part which is cylindrical, and in which the cylindrical valve body is coaxially accommodated; and a plurality of second openings which are formed in the valve body outer circumference part, are connected to a refrigerant circuit, and through which the refrigerant circulates. The cylindrical valve body is formed such that the first openings and the second openings communicate as a result of rotating the cylindrical valve body relative to the valve body outer circumference part.

Description

Rotary flow path opening / closing valve

The present invention relates to a rotary flow path opening / closing valve, and more particularly, to a structure of a rotary flow path opening / closing valve.

In an air conditioner, both a cooling function and a heating function are implemented, and in addition, various functions such as a defrosting function and a humidifying function are mounted to meet various user needs. . For example, Patent Document 1 discloses a heat pump that uses a rotary four-way switching valve that interrupts heating operation during heating operation and switches to cooling operation to perform a defrosting function. In the heat pump, frost is generated in the outdoor heat exchanger during the heating operation in which the outdoor heat exchanger functions as an evaporator, so the rotary four-way switching valve refrigerant circuit is changed and the cooling operation is performed. The frost is melting.

JP 2012-127632 A

In Patent Document 1, a rotary four-way switching valve is provided as an element for changing the configuration of the refrigerant circuit. In addition, a plurality of electromagnetic valves are also provided to shut off the refrigerant circuit. . Since the rotary four-way switching valve and a plurality of solenoid valves are required as elements to change the configuration of the refrigerant circuit, the refrigerant circuit of the air conditioner becomes complicated, and the number of processes at the time of manufacturing is also the number of parts. Will increase, leading to an increase in the size of the air conditioner. Furthermore, in a four-way valve such as a rotary type four-way switching valve, or a solenoid valve, the on-state or the off-state is maintained depending on whether it is energized or not energized. The case where it is. If the air conditioner is provided with a plurality of four-way valves, solenoid valves, etc., it is considered that the power consumption of the air conditioner increases.

The present invention has been made in order to solve the above-described problems. A rotary flow path opening / closing valve that can switch a refrigerant flow path to a plurality of patterns with a small number of components and consumes less power. The purpose is to provide.

A rotary flow path opening / closing valve according to the present invention has a plurality of first openings, a cylindrical cylindrical valve body through which a refrigerant flows, and an inside of the cylindrical valve body, both ends of which A plurality of conduits connected to one opening, a cylindrical valve body outer periphery that coaxially accommodates the cylindrical valve body, and a valve body outer periphery formed in the valve body outer periphery and connected to a refrigerant circuit to allow refrigerant to flow A plurality of second openings, and the cylindrical valve body is rotated with respect to the outer periphery of the valve body so that the first opening and the second opening communicate with each other. It is configured.

According to the rotary flow path opening and closing valve according to the present invention, the plurality of connection points provided in the outer peripheral portion of the valve body and the plurality of openings of the circular valve body accommodated in the outer peripheral portion of the valve pair are made to coincide with each other. A refrigerant circuit through which the refrigerant flows is configured. By rotating the cylindrical valve body with respect to the outer peripheral portion of the valve body, it is possible to configure a plurality of patterns of refrigerant circuits according to the rotation angle with a small amount of power that only rotates the cylindrical valve body.

It is a schematic diagram which shows the state which has arrange | positioned the rotary flow-path on-off valve which concerns on embodiment to the air conditioning apparatus. It is a schematic diagram when the 1st cylindrical valve body and 2nd cylindrical valve body which are accommodated in the valve body outer peripheral part which concerns on embodiment are seen in the axial direction, respectively. It is a schematic diagram explaining the structure around the 1st cylindrical valve body and 2nd cylindrical valve body which concern on embodiment. It is a schematic diagram which shows the state by which the 1st cylindrical valve body and 2nd cylindrical valve body which concern on embodiment were accommodated in the valve body outer peripheral part. It is a refrigerant circuit block diagram of the state in which the rotary flow-path on-off valve which concerns on embodiment was integrated in the refrigerant circuit. It is a schematic diagram which shows the 1st cylindrical valve body and the 2nd cylindrical valve body in rotation angle (theta) of the rotary flow-path on-off valve which concerns on embodiment. It is a schematic diagram which shows the 1st cylindrical valve body and the 2nd cylindrical valve body in rotation angle (theta) of the rotary flow-path on-off valve which concerns on embodiment. It is a part of refrigerant circuit block diagram at the time of the exhaust heat recovery mode of the rotary flow-path on-off valve which concerns on embodiment. It is a part of refrigerant circuit block diagram at the time of the 1st defrost mode of the rotary flow-path on-off valve which concerns on embodiment. It is a part of refrigerant circuit block diagram at the time of the refrigerant | coolant leakage prevention mode of the rotary flow-path on-off valve which concerns on embodiment. It is a part of refrigerant circuit block diagram at the time of the 2nd defrost mode of the rotary flow-path on-off valve which concerns on embodiment. It is a part of refrigerant circuit block diagram at the time of the conventional mode of the rotary flow-path on-off valve which concerns on embodiment. It is a refrigerant circuit block diagram at the time of incorporating a some solenoid valve in a refrigerant circuit as a switching device. It is the schematic diagram which looked at the valve body outer peripheral part 80a and the 1st cylindrical valve body 81 of the rotary flow-path on-off valve 80 which concern on a modification from the axial direction.

Embodiment A rotary flow path opening / closing valve according to the present embodiment is disposed, for example, between an outdoor unit and an indoor unit of an air conditioner, and in the air conditioner, an exhaust heat recovery mode, a first defrost mode It is used as a switching device for constructing a refrigerant circuit that implements the refrigerant leakage prevention mode, the second defrosting mode, and the like.

<Configuration of the rotary flow path opening / closing valve 80>
FIG. 1 is a schematic diagram showing a state in which a rotary flow path opening / closing valve 80 according to the present embodiment is arranged in an air conditioner 103. As shown in FIG. 1, the rotary flow path opening / closing valve 80 includes a valve body outer peripheral portion 80a, and a first cylindrical valve body 81 and a second cylindrical valve body 82 housed inside the valve body outer peripheral portion 80a. Has been. The rotary flow path opening / closing valve 80 is connected to the expansion device 5a and the indoor side heat exchanger 6a of the indoor unit 60a, and the flow path switching device 2 and the outdoor heat exchanger 3 of the outdoor unit 30 by refrigerant piping. ing. The rotary flow path opening / closing valve 80 is also connected to a refrigerant pipe that connects the exhaust heat recovery heat exchanger 4 and a refrigerant pipe that forms a bypass circuit 84. The rotary flow path opening / closing valve 80 is equipped with an electric motor such as a motor 83, and the valve body of the rotary flow path opening / closing valve 80 is rotated by driving the motor 83.

The valve body outer periphery 80a has a cylindrical shape, and a plurality of connection openings 81a, 81b, 81c, 81d and connection openings 82a, 82b, 82c, 82d are formed through the valve body outer periphery 80a. ing. The connection openings 81a to 81d and the connection openings 82a to 82d are connected to a refrigerant pipe constituting a refrigerant circuit. The connection openings 81a to 81d and the connection openings 82a to 82d are connected to the outer periphery 80a of the valve body. The refrigerant flows in and out. The connection opening is an example of the second opening of the present invention.

The connection openings 81a to 81d are arranged in a line at equal intervals on the same circumference of the valve body outer periphery 80a. The connection openings 82a to 82d are arranged in a line at equal intervals on the same circumference of the valve body outer peripheral portion 80a at the positions in the axial direction of the connection openings 81a to 81d. The connection opening 81b is connected to the refrigerant pipe connected to the expansion device 5a of the indoor unit 60a, and the connection opening 81d is connected to the refrigerant pipe connected to the flow path switching device 2 of the outdoor unit 30. The connection opening 82b is connected to a refrigerant pipe connected to the indoor heat exchanger 6a of the indoor unit 60a, and the connection opening 82d is connected to a refrigerant pipe connected to the outdoor heat exchanger 3 of the outdoor unit 30. Yes. The connection opening 81a and the connection opening 82a are connected to a refrigerant pipe constituting a circuit to which the exhaust heat recovery heat exchanger 4 is connected. The connection opening 81c and the connection opening 82c are connected to a refrigerant pipe constituting the bypass circuit 84. A defrosting expansion device (not shown) may be connected in series with the heat exchanger 4 for exhaust heat recovery to the circuit connecting the connection opening 81a and the connection opening 82a.

<Configuration of first cylindrical valve body 81 and second cylindrical valve body 82>
FIG. 2 is a schematic diagram when the first cylindrical valve body 81 and the second cylindrical valve body 82 housed in the valve body outer peripheral portion 80a according to the embodiment are viewed in the axial direction. As shown in FIG. 2, the 1st cylindrical valve body 81 and the 2nd cylindrical valve body 82 which are accommodated in the valve body outer peripheral part 80a have the cylindrical shape of the same circular cross section. In the first cylindrical valve body 81 and the second cylindrical valve body 82, the refrigerant flowing through the connection openings 81 a to 81 d and the connection openings 82 a to 82 d of the valve body outer peripheral portion 80 a is connected to the outer peripheral space 801 and the outer peripheral space 802. Flows in and out through the inside. The outer peripheral space 801 is formed between the first cylindrical valve body 81 and the valve body outer peripheral portion 80a, and connection openings 81a to 81d are opened. The outer peripheral space 802 is formed between the second cylindrical valve body 82 and the valve body outer peripheral portion 80a, and connection openings 82a to 82d are opened. The outer peripheral space 801 and the outer peripheral space 802 between the outer peripheral surface of the first cylindrical valve body 81 and the second cylindrical valve body 82 and the inner peripheral surface of the valve body outer peripheral portion 80a are the first cylindrical valve body 81 and the second cylinder. It is partitioned by a wall plate 80b protruding from the outer peripheral surface of the valve body 82 toward the inner peripheral surface of the valve body outer peripheral portion 80a. The end of the wall plate 80b is slidably in contact with the inner peripheral surface of the valve body outer peripheral portion 80a. The outer peripheral space 801 and the outer peripheral space 802 are divided in the circumferential direction by a plurality of partition plates 85 protruding from the outer peripheral surfaces of the first cylindrical valve body 81 and the second cylindrical valve body 82 toward the inner surface direction of the valve body outer peripheral portion 80a. . Pipe lines 811, 812, and 813 are formed inside the first cylindrical valve body 81, and pipe lines 821, 822, and 823 are formed inside the second cylindrical valve body 82, and the pipe lines 811, Areas F other than 812 and 813 and the pipe lines 821, 822 and 823 are the region F.

FIG. 3 is a schematic diagram illustrating a configuration around the first cylindrical valve body 81 and the second cylindrical valve body 82 according to the embodiment. As shown in FIG. 3, the outer peripheral space 801 and the outer peripheral space 802 formed on the outer peripheral surfaces 810 and 820 of the first cylindrical valve body 81 and the second cylindrical valve body 82 are i = in the circumferential direction by a plurality of partition plates 85. A plurality of space portions 81 (i) and 82 (i) are formed. In the following description, the space portions 81 (i) and 82 (i) are defined as space portions 81 (1) to 81 (16) and 82 (1) to 82 (16) counterclockwise. A part of the space portions 81 (i) and 82 (i) has openings in the outer peripheral surfaces 810 and 820, and the first through the openings in the outer peripheral surfaces 810 and 820 of the space portions 81 (i) and 82 (i). The refrigerant flows into and out of the first cylindrical valve body 81 and the second cylindrical valve body 82. Out of the space portions 81 (i) and 82 (i), the space portions 81 (10), 81 (14), 82 (10), and 82 (14) have the outer peripheral surfaces 810 and 820 closed, and the refrigerant Do not distribute. The openings on the outer peripheral surfaces 810 and 820 are an example of the first opening of the present invention.

Both ends of the pipe lines 811, 812, 813 and the pipe lines 821, 822, 823 are connected to the openings of the outer peripheral surfaces 810, 820, and the refrigerant flows through the first cylindrical valve body 81 and the second cylinder through a predetermined path. A flow path is defined so as to flow inside the valve body 82. The pipe lines 811, 812, and 813 allow the refrigerant flowing from the space portion 81 (i) connected at one end to flow only toward the space portions 81 (i) and 82 (i) connected at the other end. The flow path is defined. Specifically, the pipe line 811 is connected to the space portion 81 (16) and the space portion 81 (4). The pipe line 812 is connected to the space part 81 (2) and the space part 81 (6). Further, the pipe line 813 is connected to the space portions 81 (7) to 81 (9) and the space portions 81 (11) to 81 (13). Similarly, at both ends of the pipes 821, 822, and 823, the refrigerant flowing from the space portion 82 (i) to which one end is connected flows only toward the space portion 82 (i) to which the other end is connected. Specifically, the pipe line 821 is connected to the space part 82 (12) and the space part 82 (16), and the pipe line 822 is connected to the space part 82 (2) and the space part 82 (6). The pipe line 823 is connected to the space portions 82 (3) to 82 (5) and the space portions 82 (7) to 82 (9). Of the space portions 81 (i) and 82 (i) connected to the pipe line 813 and the pipe line 823, the adjacent space portions 81 (i) and 82 (i) are provided with a partition plate 85 between them. It is not done. That is, the spaces 81 (7) to 81 (9) form one space and are connected to one end of the pipe line 813. The spaces 81 (11) to 81 (13) also form one space and are connected to the other end of the pipe line 813. Similarly, the space portions 82 (3) to 82 (5) and the space portions 82 (7) to 82 (9) form one space and are connected to both ends of the conduit 823.

The first cylindrical valve body 81 and the second cylindrical valve body 82 are arranged coaxially, are joined so that the inside communicates, and are accommodated in the valve body outer peripheral portion 80a. The wall plate 80b that partitions the outer peripheral surface of the first cylindrical valve body 81 and the second cylindrical valve body 82 and the inner peripheral surface of the valve body outer peripheral portion 80a into the outer peripheral space 801 and the outer peripheral space 802 is the first cylindrical valve body. 81 and the second cylindrical valve body 82. Similar to the plurality of partition plates 85, the outer peripheral end of the wall plate 80b is slidably in contact with the inner surface of the valve body outer peripheral portion 80a. Since the insides of the first cylindrical valve body 81 and the second cylindrical valve body 82 communicate with each other, in the region F other than the pipe lines 811, 812, 813 and the pipe lines 821, 822, 823, the refrigerant flow path is restricted. It is an area that can be freely distributed. The space portions 81 (i) and 82 (i) connected to the region F are connected to the region F without circulating refrigerant flowing toward the specific space portions 81 (i) and 82 (i). It can be distributed to any other space 81 (i), 82 (i). Specifically, the space portions 81 (1), 81 (3), 81 (5), 81 (15), and the space portions 82 (1), 82 (11), 82 (13), 82 (15). The outer peripheral surfaces 810 and 820 are connected to a region F where the flow path of the refrigerant is not restricted. For example, the refrigerant that has flowed from the openings of the outer peripheral surfaces 810 and 820 of the space portion 81 (1) can flow out of the space portion 82 (15).

FIG. 4 is a schematic diagram showing a state in which the first cylindrical valve body 81 and the second cylindrical valve body 82 according to the embodiment are accommodated in the valve body outer peripheral portion 80a. As shown in FIG. 4, the valve body outer peripheral portion 80a accommodates a first cylindrical valve body 81 and a second cylindrical valve body 82, and refrigerant pipes are respectively connected to the connection openings 81a to 81d and the connection openings 82a to 82d. Is connected. The connection openings 81a to 81d and the connection openings 82a to 82d of the valve body outer peripheral portion 80a coincide with the space portions 81 (i) and 82 (i) of the first cylindrical valve body 81 and the second cylindrical valve body 82. Thereby, the flow path of the refrigerant flowing into the rotary flow path opening / closing valve 80 is formed. When the first cylindrical valve body 81 and the second cylindrical valve body 82 rotate inside the valve body outer peripheral portion 80a, the valve body outer peripheral portion 80a and the first cylindrical valve body 81 and the second cylindrical valve body 82 are relative to each other. The positional relationship changes. By rotating the first cylindrical valve body 81 and the second cylindrical valve body 82, the connection openings 81a to 81d and the space portions 81 (i) and 82 (i) corresponding to the connection openings 82a to 82d are changed. Then, the flow path of the refrigerant is switched.

<Distribution route of refrigerant>
The refrigerant flows in from the connection openings 81a to 81d and the connection openings 82a to 82d formed in the outer peripheral portion 80a of the rotary flow path opening / closing valve 80, and is connected to the connection openings 81a to 81d and the connection openings 82a to 82d. Flows into the space portions 81 (i) and 82 (i) that coincide with each other. Then, it passes through the openings of the space portions 81 (i) and 82 (i) and flows into the first cylindrical valve body 81 and the second cylindrical valve body 82. The refrigerant flows through the pipe lines 811, 812, 813 and the pipe lines 821, 822, 823 or the region F of the first cylindrical valve body 81 and the second cylindrical valve body 82, and the space portions 81 (i), 82 ( It flows out from the opening of i). The refrigerant passes through any one of the connection openings 81a to 81d and the connection openings 82a to 82d of the valve body outer peripheral portion 80a that coincides with the spaces 81 (i) and 82 (i) through which the refrigerant has passed. The refrigerant pipes connected to the connection openings 82a to 82d are circulated.

<Operation of the rotary flow path opening / closing valve 80>
FIG. 5 is a refrigerant circuit configuration diagram in a state where the rotary flow path opening / closing valve 80 according to the embodiment is incorporated in the refrigerant circuit. As shown in FIG. 5, the rotary flow path opening / closing valve 80 is connected to the expansion device 5a of the indoor unit 60a, the indoor heat exchanger 6a, and the outdoor unit 30 at the connection openings 81a to 81d and the connection openings 82a to 82d. The flow path switching device 2 and the outdoor heat exchanger 3 are connected to each other. The rotary flow path opening / closing valve 80 forms a refrigerant circuit whose rotation angle is controlled by the control device in accordance with the operation content of the air conditioner 103, and the desired operation content can be realized by changing the refrigerant path. When the motor 83 of the rotary flow path opening / closing valve 80 is driven, the first cylindrical valve body 81 and the second cylindrical valve body 82 inside the valve body outer peripheral portion 80a have a predetermined rotation angle with respect to the valve body outer peripheral portion 80a. It rotates by n × θ.

6 and 7 are schematic views showing the first cylindrical valve body 81 and the second cylindrical valve body 82 at the rotation angle θ of the rotary flow path opening / closing valve 80 according to the embodiment. Note that the rotation angle θ is a clockwise rotation of the first cylindrical valve body 81 and the second cylindrical valve body 82 when the rotation angle = θ at which the connection opening 81a and the space portion 81 (16) coincide is the reference position. It is a rotation angle from the reference position when it is rotated to the position. As shown in FIGS. 6 and 7, the predetermined rotation angle n × θ is represented by an angle θ of two wall surfaces that define the respective space portions 81 (i) and 82 (i). That is, θ is a multiple of 360 ° / i. By rotating the first cylindrical valve body 81 and the second cylindrical valve body 82 at a predetermined rotation angle θ, the path through which the refrigerant circulates is configured with a pattern of the number of spaces. In the present embodiment, the spaces 81 (i) and 82 (i) are defined by dividing the outer periphery of the first cylindrical valve body 81 and the second cylindrical valve body 82 by i = 16 by wall surfaces. Therefore, the angle θ = 360 ° / 16 = 22.5 °, and 16 patterns of paths through which the refrigerant circulates are obtained.

The rotary flow path opening / closing valve 80 rotates the first cylindrical valve body 81 and the second cylindrical valve body 82 at a predetermined rotation angle n × θ, and the valve body outer peripheral portion 80a, the first cylindrical valve body 81, and the first cylindrical valve body 81 The relative position with respect to the two cylindrical valve bodies 82 is changed. As a result, the connection openings 81a to 81d and the space portions 81 (i) and 82 (i) corresponding to the connection openings 82a to 82d are changed, and the path through which the refrigerant circulates is switched. Then, the connection openings 81a to 81d and the connection openings 82a to 82d communicate with the spaces 81 (i) and 82 (i), and the refrigerant flows.

<Operation of refrigerant>
The refrigerant that has reached the connection openings 81a to 81d of the rotary flow path opening / closing valve 80 passes through the opening of the space 81 (i) that coincides with the connection openings 81a to 81d from the connection openings 81a to 81d. , Flows into the second cylindrical valve element 82. The refrigerant that has reached the connection openings 82a to 82d passes through the openings in the space 82 (i) that coincide with the connection openings 82a to 82d from the connection openings 82a to 82d, and then the first cylindrical valve body 81 and the second cylindrical valve body 82. Flow into. The refrigerant flowing in from the connection openings 81a to 81d and the connection openings 82a to 82d flows through the inside of the valve body outer peripheral portion 80a. Then, through the openings of the space portions 81 (i) and 82 (i), any of the other connection openings 81a to 81d and the connection openings 82a to 82d that coincide with the space portions 81 (i) and 82 (i) Spill from.

<Operation of Air Conditioner 103>
The air conditioner 103 performs a path corresponding to each operation content by the rotary flow path opening / closing valve 80 in order to implement the exhaust heat recovery mode, the first defrosting mode, the refrigerant leakage prevention mode, or the second defrosting mode. Circulate the refrigerant. The operation content includes a refrigerant circuit that implements a conventional mode in which the exhaust heat recovery auxiliary circuit 8 is not connected. When the motor 83 is energized, the rotary flow path opening / closing valve 80 rotates at a rotation angle corresponding to the operation content, and the refrigerant flow path is switched.

　表１に示すように、回転式流路開閉弁８０は、所定の回動角度ｎ×θで回動されると、回動角度に応じてそれぞれの接続開口８１ａ～８１ｄ、接続開口８２ａ～８２ｄに一致する空間部８１（ｉ）、８２（ｉ）が切り替わる。そして、接続開口８１ａ～８１ｄ、及び、接続開口８２ａ～８２ｄのそれぞれの接続相手が変更され、排熱回収モード、第１霜取モード、冷媒漏洩防止モード、又は、第２霜取モードを実施する冷媒回路が構成される。具体的には、回動角度が９０°又は２７０°とすることで、排熱回収モードの冷媒回路が構成される。０°、１５７．５°、１８０°又は２０２．５°とすることで、第１霜取りモードの冷媒回路が構成され、１１２．５°、２４７．５°、２９２．５°又は３１５°とすることで冷媒漏洩防止モードの冷媒回路が構成される。４５°又は６７．５°とすることで第２霜取りモードの冷媒回路が構成される。なお、回動角度が２２．５°又は３３７．５°とすると、従来の排熱回収用熱交換器４が用いられていない回路が構成される。回動角度が１３５°、２２５°であると、接続開口８１ｄ、８２ｄが、空間部８１（１０）又は空間部８１（１４）、空間部８２（１０）又は空間部８２（１４）に一致する。この場合は、室外側熱交換器３及び流路切替装置２を含まない回路となり、冷媒回路が成立せず、空気調和装置１０３が機能しない。回転式流路開閉弁８０は、ｎ＝１～３、１３～１６であると、回動角度が０°～４５°及び２７０°～３３７．５°となり、全てのパターンの冷媒回路がほぼ連続的に出現し、間に成立しない冷媒回路が介在することがない。 Table 1 shows the correspondence between the rotation angle of the rotary flow path opening / closing valve 80, the connection openings 81a to 81d, the connection openings 82a to 82d, and the space portions 81 (i) and 82 (i) corresponding to the respective connection openings. It is a table | surface which shows a relationship. In Table 1, the space portion 81 (i) = 81 (1) to 81 (16) and the space portion 82 (i) = 82 (1) to 82 (16) are shown as i = 1 to 16. Yes. When i = 0 to 9, 11 to 13, and 15 to 16, the outer peripheral surfaces 810 and 820 are open, and i = 10 and 14 are the spaces 81 (i) and 82 where the outer peripheral surfaces 810 and 820 are closed. (I).

As shown in Table 1, when the rotary flow path opening / closing valve 80 is rotated at a predetermined rotation angle n × θ, the connection openings 81a to 81d and the connection openings 82a to 82d are respectively corresponding to the rotation angles. The space portions 81 (i) and 82 (i) that match are switched. Then, the connection partners of the connection openings 81a to 81d and the connection openings 82a to 82d are changed, and the exhaust heat recovery mode, the first defrosting mode, the refrigerant leakage prevention mode, or the second defrosting mode is performed. A refrigerant circuit is configured. Specifically, the refrigerant circuit in the exhaust heat recovery mode is configured by setting the rotation angle to 90 ° or 270 °. By setting 0 °, 157.5 °, 180 °, or 202.5 °, the refrigerant circuit in the first defrosting mode is configured, and 112.5 °, 247.5 °, 292.5 °, or 315 °. Thus, the refrigerant circuit in the refrigerant leakage prevention mode is configured. The refrigerant circuit of the 2nd defrost mode is comprised by setting it as 45 degrees or 67.5 degrees. If the rotation angle is 22.5 ° or 337.5 °, a circuit in which the conventional exhaust heat recovery heat exchanger 4 is not used is configured. When the rotation angle is 135 ° and 225 °, the connection openings 81d and 82d coincide with the space portion 81 (10) or the space portion 81 (14), the space portion 82 (10), or the space portion 82 (14). . In this case, the circuit does not include the outdoor heat exchanger 3 and the flow path switching device 2, the refrigerant circuit is not established, and the air conditioner 103 does not function. In the rotary flow path opening / closing valve 80, when n = 1 to 3 and 13 to 16, the rotation angles are 0 ° to 45 ° and 270 ° to 337.5 °, and the refrigerant circuits of all patterns are almost continuous. Therefore, there is no intervening refrigerant circuit that appears in the middle.

<Exhaust heat recovery mode>
FIG. 8 is a part of a refrigerant circuit configuration diagram in the exhaust heat recovery mode of the rotary flow path opening / closing valve 80 according to the embodiment. As shown in FIG. 8, in the exhaust heat recovery mode, the rotary flow path opening / closing valve 80 is rotated, for example, at a rotation angle n × θ = 270 °. Here, referring to Table 2, at the rotation angle n × θ = 270 °, the connection openings 81a to 81d have the space portion 81 (12), the space portion 81 (8), the space portion 81 (4), and the space portion. 81 (16). The connection openings 82a to 82d communicate with the space 82 (12), the space 82 (8), the space 82 (4), and the space 82 (16).

In the refrigerant circuit, the connection opening 81a and the connection opening 81b, and the connection opening 81d and the connection opening 81c are connected by the first cylindrical valve body 81, and the connection opening 82a and the connection opening 82d are connected by the second cylindrical valve body 82, and The connection opening 82b and the connection opening 82c are connected. That is, the connection opening 81a and the connection opening 81b are connected by the pipe line 813 that defines the flow path from the space portion 81 (12) to the space portion 81 (8). Further, the connection opening 81d and the connection opening 81c are connected by a pipe line 811 that defines a flow path from the space portion 81 (16) to the space portion 81 (4). The connection opening 82a and the connection opening 82d are connected by a pipe line 823 that defines a flow path from the space 82 (12) to the space 82 (16), and the connection opening 82c and the connection opening 82b are connected to the space 82. It is connected by a pipe line 823 that defines a flow path from (4) to the space portion 82 (8). As a result, the flow path switching device 2, the bypass circuit 84, and the indoor heat exchanger 6a are connected, the expansion device 5a and the exhaust heat recovery heat exchanger 4 are connected, and the exhaust heat recovery heat exchanger 4 and the chamber are connected. The refrigerant circuit in the exhaust heat recovery mode is configured by connecting to the outer heat exchanger 3.

During the cooling operation, the high-temperature and high-pressure refrigerant discharged from the compressor 1 exchanges heat with outdoor air in the outdoor heat exchanger 3, and then exhausts and heats of the ventilator 10 in the exhaust heat recovery heat exchanger 4. Exchange. Further, during the heating operation, the low-temperature refrigerant condensed in the indoor heat exchanger 6a exchanges heat with the exhaust of the ventilator 10 in the exhaust heat recovery heat exchanger 4, and then outdoor in the outdoor heat exchanger 3. Exchange heat with air.

In the above description, the rotation angle n × θ = 270 ° has been described, but a similar refrigerant circuit is configured even when the rotation angle n × θ = 90 °.

<First defrosting mode>
FIG. 9 is a part of a refrigerant circuit configuration diagram in the first defrosting mode of the rotary flow path opening / closing valve 80 according to the embodiment. As shown in FIG. 9, in the first defrosting mode, the rotary flow path opening / closing valve 80 is rotated at a rotation angle n × θ = 0 °, for example. The rotation angle n × θ = 0 ° is the rotation angle of the reference position. Here, referring to Table 2, at the rotation angle n × θ = 0 °, the connection openings 81a to 81d have the space portion 81 (16), the space portion 81 (12), the space portion 81 (8), and the space portion. 81 (4). The connection openings 82a to 82d communicate with the space portion 82 (16), the space portion 82 (12), the space portion 82 (8), and the space portion 82 (4).

In the refrigerant circuit, the connection opening 81a and the connection opening 81d, and the connection opening 81b and the connection opening 81c are connected by the first cylindrical valve body 81, and the connection opening 82a and the connection opening 82b are connected by the second cylindrical valve body 82, and The connection opening 82c and the connection opening 82d are connected. That is, the connection opening 81a and the connection opening 81d are connected by the pipe line 811 that defines the flow path from the space portion 81 (16) to the space portion 81 (4). And the connection opening 81b and the connection opening 81c are connected by the pipe line 813 which prescribes | regulates the flow path from the space part 81 (12) to the space part 81 (8). Moreover, the connection opening 82a and the connection opening 82b are connected by the pipe line 821 which prescribes | regulates the flow path from the space part 81 (16) to the space part 81 (12). The connection opening 82c and the connection opening 82d are connected to each other by a pipe line 823 that defines a flow path from the space portion 82 (8) to the space portion 82 (4). Thereby, the flow path switching device 2 and the heat exchanger 4 for exhaust heat recovery are connected, and the expansion device 5a and the bypass circuit 84 are connected. Further, the heat exchanger 4 for exhaust heat recovery and the indoor heat exchanger 6a are connected, and the outdoor heat exchanger 3 and the bypass circuit 84 are connected to constitute a refrigerant circuit in the first defrosting mode.

The refrigerant that has flowed out of the outdoor heat exchanger 3 flows into the indoor unit 60a, and then flows into the heat exchanger 4 for exhaust heat recovery. The refrigerant exchanges heat with the exhaust of the ventilator 10 in the exhaust heat recovery heat exchanger 4, then flows into the compressor 1, and defrosts again in the outdoor heat exchanger 3.

In the above description, the rotation angle n × θ = 0 ° has been described, but a similar refrigerant circuit is configured even when the rotation angle n × θ = 157.5 °, 180 °, or 202.5 °.

<Refrigerant leakage prevention mode>
FIG. 10 is a part of a refrigerant circuit configuration diagram in the refrigerant leakage prevention mode of the rotary flow path opening / closing valve 80 according to the embodiment. As shown in FIG. 10, in the refrigerant leakage prevention mode, the rotary flow path opening / closing valve 80 is rotated at, for example, a rotation angle n × θ = 315 °. Here, referring to Table 2, when the rotation angle is n × θ = 315 °, the connection openings 81a to 81d are the space portion 81 (14), the space portion 81 (10), the space portion 81 (6), and the space portion. 81 (2). Further, the connection openings 82a to 81d communicate with the space portion 82 (14), the space portion 82 (10), the space portion 82 (6), and the space portion 82 (2).

In the refrigerant circuit, the connection opening 81c and the connection opening 81d are connected by the first cylindrical valve body 81, and the connection opening 82c and the connection opening 82d are connected by the second cylindrical valve body 82. That is, the connection opening 81c and the connection opening 81d are connected by the pipe line 812 that defines the flow path from the space portion 81 (6) to the space portion 81 (2). In addition, the connection opening 82c and the connection opening 82d are connected by a pipe line 822 that defines a flow path from the space portion 82 (6) to the space portion 82 (2). On the other hand, the connection opening 81a and the connection opening 81b, and the connection opening 82a and the connection opening 82b are the closed space part 81 (14), the space part 81 (10), the space part 82 (14), and the space. The flow path is not formed in communication with the portion 82 (10). As a result, the heat exchanger 4 for exhaust heat recovery and the indoor heat exchanger 6a are disconnected from the refrigerant circuit, and the refrigerant circuit in the refrigerant leakage prevention mode is configured. When the refrigerant leakage is detected, the operation of the compressor 1 is stopped, and the exhaust heat recovery heat exchanger 4 and the indoor heat exchanger 6a are disconnected from the refrigerant circuit. In addition, this mode can also be utilized as a defrosting mode by what is called triangular operation with the operation of the compressor 1.

In the above description, the rotation angle n × θ = 315 ° has been described, but a similar refrigerant circuit is configured even when the rotation angle n × θ = 112.5 °, 247.5 °, or 292.5 °. The In this case, the refrigerant circuit in which the refrigerant circuit is closed by the outer peripheral surfaces 810 and 820 of the space portions 81 (i) and 82 (i) is not configured, and the flow path of the refrigerant is restricted by the pressure relationship. become.

<Second defrosting mode>
FIG. 11 is a part of a refrigerant circuit configuration diagram in the second defrosting mode of the rotary flow path opening / closing valve 80 according to the embodiment. As shown in FIG. 11, in the second defrosting mode, the rotary flow path opening / closing valve 80 is rotated at a rotation angle n × θ = 45 °, for example. Here, referring to Table 1, at the rotation angle n × θ = 45 °, the connection openings 81a to 81d are the space portion 81 (2), the space portion 81 (14), the space portion 81 (10), and the space portion. 81 (6). The connection openings 82a to 82d communicate with the space portion 82 (2), the space portion 82 (14), the space portion 82 (10), and the space portion 82 (6).

In the refrigerant circuit, the connection opening 81a and the connection opening 81d of the first cylindrical valve body 81 are connected, and the connection opening 82a and the connection opening 82d of the second cylindrical valve body 82 are connected. That is, the connection opening 81a and the connection opening 81d are connected by the pipe line 812 that defines the flow path from the space portion 81 (2) to the space portion 81 (6), and the connection opening 82a and the connection opening 82d are connected to the space portion 82. They are connected by a pipe line 822 that defines a flow path from (2) to the space 82 (6). On the other hand, the connection opening 81b and the connection opening 81c, and the connection opening 82b and the connection opening 82c are closed space part 81 (14), space part 81 (10), space part 82 (14), space part. 82 (10) communicates and no flow path is formed. Thereby, the flow path switching device 2, the exhaust heat recovery heat exchanger 4 and the outdoor heat exchanger 3 are connected to form a refrigerant circuit in the second defrosting mode.

In the above description, the rotation angle n × θ = 45 ° has been described, but a similar refrigerant circuit is configured even when the rotation angle n × θ = 67.5 °. In this case, the refrigerant circuit in which the refrigerant circuit is closed by the outer peripheral surfaces 810 and 820 of the space portions 81 (i) and 82 (i) is not configured, and the refrigerant flow path is restricted by the pressure relationship.

<Conventional mode>
FIG. 12 is a part of a refrigerant circuit configuration diagram in the conventional mode of the rotary flow path opening / closing valve 80 according to the embodiment. As shown in FIG. 12, when the rotary flow path opening / closing valve 80 is rotated, for example, at a rotation angle n × θ = 22.5 °, a conventional mode refrigerant circuit is configured. The refrigerant circuit in the conventional mode is a refrigerant circuit in which the exhaust heat recovery auxiliary circuit 8 is not provided. Here, referring to Table 1, at the rotation angle n × θ = 22.5 °, the connection openings 81a to 81d are the space portion 81 (1), the space portion 81 (13), the space portion 81 (9), It communicates with the space part 81 (5). The connection openings 82a to 82d communicate with the space portion 82 (1), the space portion 82 (13), the space portion 82 (9), and the space portion 82 (5).

In the refrigerant circuit, the first cylindrical valve body 81 connects the connection opening 81b and the connection opening 81c, and the second cylindrical valve body 82 connects the connection opening 82a and the connection opening 82d. That is, the connection opening 81b and the connection opening 81c are connected by the pipe line 813 that defines the flow path from the space portion 81 (13) to the space portion 81 (9). The connection opening 82c and the connection opening 82d are connected by a pipe line 822 that defines a flow path from the space portion 82 (9) to the space portion 82 (10). On the other hand, the connection opening 81a and the connection opening 81d, and the connection opening 82a and the connection opening 82b are the space portion 81 (1), the space portion 81 (5), the space portion 82 (1), and the space portion 82 ( 13). The space portion 81 (1), the space portion 81 (5), the space portion 82 (1), and the space portion 82 (13) have flow paths inside the first cylindrical valve body 81 and the second cylindrical valve body 82. It is connected to a region F that is not defined, and the flow path of the refrigerant is regulated by the pressure relationship. Thereby, the outdoor side heat exchanger 3, the flow path switching device 2, the expansion device 5a, and the indoor side heat exchanger 6a are connected to form a conventional refrigerant circuit.

In the above description, the rotation angle n × θ = 22.5 ° has been described, but a similar refrigerant circuit is configured even when the rotation angle n × θ = 337.5 °. Also in this case, the space portion 81 (15), the space portion 81 (3), the space portion 82 (15), and the space portion 82 (11) are connected to the first cylindrical valve body 81 and the second cylindrical valve body 82. The refrigerant is connected to a region F where the flow path is not defined inside, and the flow path of the refrigerant is regulated by the pressure relationship.

FIG. 13 is a refrigerant circuit configuration diagram when a plurality of solenoid valves are incorporated in the refrigerant circuit as a switching device. As shown in FIG. 13, when a plurality of electromagnetic valves 7a, 7b, 7c, 7d, 7e, and 7f are incorporated in the air conditioner 102, ON and OFF are controlled according to the operation content, and the exhaust heat is exhausted. The recovery mode, the first defrost mode, the refrigerant leakage prevention mode, and the second defrost mode are performed. Specifically, the plurality of solenoid valves 7 a, 7 b, 7 c, 7 d, 7 e, and 7 f include the indoor heat exchanger 6 a and the expansion device 5 a of the indoor unit 60 a and the outdoor heat exchanger 3 of the outdoor unit 30. And the path | route of the refrigerant | coolant which distribute | circulates the flow-path switching apparatus 2 is changed. The configuration of this refrigerant circuit is the same as the configuration of the refrigerant circuit shown in FIG. 5 with the rotary flow path opening / closing valve 80 incorporated in the refrigerant circuit. As described above, the rotary flow path opening / closing valve 80 is configured by a single rotary flow path opening / closing valve 80 as a refrigerant circuit including a plurality of electromagnetic valves.

In the present embodiment, the valve body outer peripheral portion 80a has been described as an example in which the first cylindrical valve body 81 and the second cylindrical valve body 82 are accommodated. A plurality of bodies may be accommodated, and the number of cylindrical valve bodies is not limited. Further, the path of the pipeline formed inside each cylindrical valve body, the configuration of the region F, and the number and position of the connection openings are not limited. Further, an example in which i = 16 is divided between the valve body outer peripheral portion 80a and the first cylindrical valve body 81 and the second cylindrical valve body 82 is described, but the number of divisions is not limited, and the outer peripheral surface 810 is divided. , 820 is not limited in the number of spaces. By appropriately changing the number of cylindrical valve bodies, the route followed by the pipeline, the configuration of the region F, the number and position of the connection openings, and the number of divisions of the space, the route through which the refrigerant flows is determined and the desired route is realized. can do.

<Modification>
FIG. 14 is a schematic view of the valve body outer peripheral portion 80a and the first cylindrical valve body 81 of the rotary flow path opening / closing valve 80 according to the modification viewed from the axial direction. In addition, since the 2nd cylindrical valve body 82 is the structure similar to the 1st cylindrical valve body 81, description of the 2nd cylindrical valve body 82 is abbreviate | omitted in the following description. In the rotary flow path opening / closing valve 80 according to the modification, the inner peripheral surface of the valve body outer peripheral portion 80a and the outer peripheral surface 810 of the first cylindrical valve body 81 are in contact with each other, and the outer peripheral space 801 is not provided. The outer peripheral surface 810 is provided with a slit 814 that opens at a position corresponding to the space portion 81 (i). Further, slits 814 are continuously formed on the outer peripheral surface 810 corresponding to the adjacent space portion 81 (i). That is, one continuous slit 814 is formed on the outer peripheral surface 810 corresponding to the spaces 81 (7) to 81 (9), and is connected to one end of the pipe line 813.

The rotary flow path opening / closing valve 80 according to the present embodiment described above has openings on the outer peripheral surfaces 810 and 820 in the valve body outer peripheral portion 80a in which the connection openings 81a to 81d and the connection openings 82a to 82d are formed. A first cylindrical valve element 81 and a second cylindrical valve element 82 are accommodated. Communication between the outer peripheral surfaces 810 and 820 of the first cylindrical valve body 81 and the second cylindrical valve body 82 and the connection openings 81a to 81d and the connection openings 82a to 82d of the valve body outer peripheral portion 80a allows the first cylindrical valve body. The refrigerant flows into the 81 and the second cylindrical valve body 82. When the first cylindrical valve body 81 and the second cylindrical valve body 82 are rotated at a predetermined angle, the relative positions of the openings of the outer peripheral surfaces 810 and 820 and the connection openings 81a to 81d and the connection openings 82a to 82d are changed. To do. Thus, the connection openings 81a to 81d and the connection openings 82a to 82d communicate with the openings of the outer peripheral surfaces 810 and 820 connected to the pipes inside the first cylindrical valve body 81 and the second cylindrical valve body 82, and the refrigerant The flow path is switched. As described above, the rotary flow path opening / closing valve 80 can switch a complicated refrigerant circuit to a plurality of patterns with only one component by a simple operation of rotating at a predetermined angle. In addition, the motor 83 that rotates the rotary flow path opening / closing valve 80 may be energized during rotation, and does not require power when the angle is maintained. Therefore, it is possible to obtain a switching device that realizes a reduction in the number of parts and a reduction in power consumption, and has both space saving and ease of operation.

Further, the rotary flow path opening / closing valve 80 according to the present embodiment is provided between the outer peripheral surfaces 810 and 820 of the first cylindrical valve body 81 and the second cylindrical valve body 82 and the inner peripheral surface of the valve body outer peripheral portion 80a. In addition, space portions 81 (i) and 82 (i) divided by a plurality of partition plates 85 are formed. Thereby, a connection opening can be connected with the opening of the some outer peripheral surface 810,820.

Further, in the rotary flow path opening / closing valve 80 according to the present embodiment, a plurality of partition plates 85 are arranged from the outer peripheral surfaces 810 and 820 of the first cylindrical valve body 81 and the second cylindrical valve body 82 to the valve body outer peripheral portion 80a. It protrudes toward the inner peripheral surface and is in contact with the inner peripheral surface of the valve body outer peripheral portion 80a. Thereby, when the first cylindrical valve body 81 and the second cylindrical valve body 82 rotate inside the valve body outer peripheral portion 80a, the plurality of partition plates 85 slide on the inner peripheral surface of the valve body outer peripheral portion 80a, The refrigerant will not leak.

Further, in the rotary flow path opening / closing valve 80 according to the present embodiment, the first cylindrical valve body 81 and the second cylindrical valve body 82 are coaxially joined and accommodated coaxially with the valve body outer peripheral portion 80a. . Therefore, a plurality of pipelines 811, 812, 813 and pipelines 821, 822, 823 that define the fluid flow paths are formed, and a plurality of refrigerant flow paths are provided to form a desired refrigerant circuit. Can do.

Further, the rotary flow path opening / closing valve 80 according to the present embodiment protrudes toward the inner peripheral surface of the valve body outer peripheral portion 80a on the outer peripheral side of the joint portion of the first cylindrical valve body 81 and the second cylindrical valve body 82. A wall plate 80b is formed. Therefore, the connection openings 81a to 81d can be communicated with the outer peripheral surface 810, and the connection openings 82a to 82d can be communicated with the opening of the outer peripheral surface 820. Thereby, a desired refrigerant circuit can be constituted.

Further, in the rotary flow path opening / closing valve 80 according to the present embodiment, the insides of the first cylindrical valve body 81 and the second cylindrical valve body 82 communicate with each other. Therefore, the refrigerant flowing in from the connection openings 81a to 81d can flow out of the connection openings 82a to 82d, or the refrigerant flowing in from the connection openings 82a to 82d can flow out of the connection openings 81a to 81d to form a desired refrigerant circuit. .

Further, in the rotary flow path opening / closing valve 80 according to the present embodiment, the connection openings 81a to 81d are arranged in a line in the circumferential direction, the connection openings 82a to 82d are arranged in a line in the circumferential direction, and the connection opening 81a To 81d and connection openings 82a to 82d are arranged in two rows in the axial direction. Thereby, the rotary flow path opening / closing valve 80 can be reduced in size.

1 compressor, 2 flow switching device, 3 outdoor heat exchanger, 4 heat recovery heat exchanger, 5a expansion device, 6a indoor heat exchanger, 7a, 7b, 7c, 7d, 7e solenoid valve, 8 Auxiliary circuit for exhaust heat recovery, 10 ventilator, 30 outdoor unit, 60a indoor unit, 80 rotary channel opening / closing valve, 80a valve body outer periphery, 80b wall plate, 81 (1) to 81 (16), 82 (1 ) To 82 (16) space part, 81 first cylindrical valve body, 81a, 81b, 81c, 81d, 82a, 82b, 82c, 82d connection opening, 82 second cylindrical valve body, 83 motor, 84 bypass circuit, 85 partition Plate, 103 air conditioner, 801 outer peripheral space, 802 outer peripheral space, 810 outer peripheral surface, 811 conduit, 812 conduit, 813 conduit, 814 slit, 820 outer peripheral surface, 821 conduit 822 pipe, 823 pipe.

Claims (7)

A cylindrical cylindrical valve body having a plurality of first openings and through which the refrigerant flows;
A plurality of conduits formed inside the cylindrical valve body, both ends of which are connected to the first opening;
A cylindrical valve body outer peripheral portion that coaxially accommodates the cylindrical valve body; and
A plurality of second openings formed in the outer periphery of the valve body, connected to a refrigerant circuit and through which the refrigerant flows;
With
The cylindrical valve body is
A rotary flow path opening / closing valve configured to communicate with the first opening and the second opening by rotating with respect to the outer periphery of the valve body. Between the outer peripheral surface of the cylindrical valve body and the inner peripheral surface of the valve body outer peripheral portion,
A plurality of space portions formed on the outer peripheral surface of the cylindrical valve body and divided by a plurality of partition plates are formed.
The rotary flow path opening / closing valve according to claim 1. The plurality of partition plates are
Projecting from the outer peripheral side of the cylindrical valve body toward the inner peripheral surface of the outer peripheral part of the valve body,
The rotary flow path opening / closing valve according to claim 2, which is in contact with an inner peripheral surface of the outer peripheral portion of the valve body. The outer periphery of the valve body is
A plurality of the cylindrical valve bodies joined on the same axis of the outer periphery of the valve body are accommodated on the same axis of the outer periphery of the valve body.
The rotary flow path opening / closing valve according to claim 2 or 3. The plurality of cylindrical valve bodies are:
Provided on the outer peripheral side of the joint portion, comprising a wall plate protruding on the inner peripheral surface of the valve body outer peripheral portion,
The wall plate is
The rotary flow path opening / closing valve according to claim 4, which is in contact with an inner peripheral surface of the outer peripheral portion of the valve body. The rotary flow path opening / closing valve according to claim 4 or 5, wherein the insides of the plurality of cylindrical valve bodies communicate with each other. The plurality of second openings are
A plurality of the valve bodies are formed in a row in the circumferential direction of the outer peripheral portion,
Arranged in a plurality of rows in the axial direction of the outer periphery of the valve body,
The rotary flow path opening / closing valve according to any one of claims 1 to 6.

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