JPH0712242A - Flow path selector valve and air-conditioner device using it - Google Patents

Abstract

PURPOSE:To lessen the space through structuring in a single piece a plurality of selector valves to be used in a heat pump type air-conditioner device, etc., and to suppress the power consumption during the operation. CONSTITUTION:A flow path selector valve is chiefly composed of a housing 17 and a rotor 16, and prior to assembling, a plurality of ports are provided in the radial direction in the specified position in axial and circumferential directions of the housing 17, and the first notch 23 and the secondary notch 25 for forming flow path are furnished in the specified position in the axial and circumferential directions of the rotor 16. The rotor 16 is roratably inserted in the cylindrical space of the housing 17 and rotated by a motor 13. The rotor 16 stops at certain rotational angles, for example 90-deg. intervals, and each of the sections A-A, B-B works in the same manner as two selector valves, i.e., as if four selector valves were integrated.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a valve for switching a flow path in a fluid handling system such as a heat pump type air conditioner.

[0002]

2. Description of the Related Art As an example of a fluid handling system,
Cooling, heating disclosed in Japanese Patent Laid-Open No. 4-151324,
FIG. 7 shows a heat pump cycle for switching among many operation modes such as dehumidifying heating and defrosting / dehumidifying. 51 is a compressor, 52 is an accumulator, 53 is a four-way valve, 5
4, 56 are indoor heat exchangers, 55 are outdoor heat exchangers, 57,
58 is a solenoid valve, 59, 60, 61 are capillaries, 62,
Reference numeral 63 is a check valve, and 64 is an auxiliary heater.

[0003]

In the conventional system,
Four-way valve 53, solenoid valves 57 and 58, and check valves 62 and 6
Since 3 and the like are arranged independently of each other, the large number of valves causes the entire system to be large and complicates the piping. SUMMARY OF THE INVENTION It is an object of the present invention to provide a flow path switching valve that solves the above-mentioned problems of the prior art, thereby simplifying and downsizing the piping configuration of the system.

[0004]

In order to achieve the above-mentioned object, the present invention, in the first aspect, has a cylindrical space inside, and a radial direction is formed to form a flow path. A housing having a plurality of openings to be opened, and a plurality of communication passages rotatably inserted into a cylindrical space of the housing and forming passages at predetermined positions in the axial direction and the circumferential direction. A rotor that is provided with means and forms a flow path that selectively stops the plurality of openings of the housing by the plurality of communication flow path means by stopping at a predetermined position in the cylindrical space. And a rotary driving means for rotating the rotor and stopping the rotor at a predetermined position. Technical means according to claim 2, wherein the compressor, the outdoor heat exchanger, and the first heat exchanger are provided. Indoor heat exchanger, second indoor heat exchanger First pressure reducing means, second pressure reducing means,
And a heat pump type air conditioner including a refrigerant pipe that connects them to form a closed circuit, wherein the plurality of openings of the flow path switching valve according to claim 1 are first to sixth openings, The first opening is connected to the refrigerant pipe connecting the first indoor heat exchanger and the first pressure reducing means, and the second opening is connected to the second indoor heat. The refrigerant pipe is connected to connect the exchanger to the suction side of the compressor, and the third opening connects the second pressure reducing means to the second indoor heat exchanger. The fifth opening is connected to a refrigerant pipe, the fourth opening is connected to the refrigerant piping that connects the discharge side of the compressor and the first indoor heat exchanger, and the fifth opening. Is connected to the refrigerant pipe connecting the outdoor heat exchanger and the second pressure reducing means. It is, opening of the sixth, the first pressure reducing means and is connected to the refrigerant pipe connecting the outdoor heat exchanger, the first to sixth
The opening portion of is configured to selectively switch the circulation paths of the components of the closed circuit by being selectively communicated with each other by the plurality of communication channel means formed in the rotor of the channel switching valve. The technical means of being adopted is adopted.

[0005]

According to the flow path switching valve of the present invention having the structure described in claim 1, the rotor inserted into the cylindrical space of the housing is freely rotated by being driven by the rotation driving means, and a predetermined value is obtained. By stopping at the position,
The flow paths are switched by selectively connecting or blocking the flow paths by the communication flow path means of the rotor between the plurality of openings formed in the housing. In the flow path switching valve of the present invention, the opening of the housing is arranged at a predetermined position not only in the circumferential direction but also in the axial direction, so that it has the same effect as integrating a plurality of switching valves. Therefore, even if it is necessary to switch the flow paths at a plurality of locations at the same time in a fluid handling system, the switching valve of the present invention can be used for simultaneous switching, and the space occupied by the switching valve can be made extremely small. can do.

Specifically, when the switching valve of the present invention is used in a heat pump type air conditioner according to claim 2, it is used in the prior art for switching operation modes such as cooling, heating, dehumidifying and defrosting. Since it is possible to switch the flow paths of the refrigerant at a plurality of locations all at once by using only one or a few flow path switching valves of the present invention instead of a plurality of changeover valves, it is possible to manufacture a small size. An air conditioner that can switch to a plurality of operating modes is realized by using an easy switching valve.

[0007]

EXAMPLE An example in which the flow path switching valve of the present invention is applied to a heat pump type air conditioner for an electric vehicle will be described below. FIG. 1 shows a system diagram of a heat pump type air conditioner for an electric vehicle based on the present invention. 1 is a hermetic compressor driven by an electric motor, 2 is an accumulator, 3
Is an indoor condenser, 4 and 6 are throttles that constitute a pressure reducing means, 5 is an outdoor heat exchanger, 7 is an indoor evaporator, 8 is an integrated flow path switching valve of the present invention, and opening / closing valves 9, 10, 11,
12 built-in. The indoor condenser 3 is arranged on the downstream side of the indoor evaporator 7 in the same ventilation system leading to the vehicle interior, and can reheat the air cooled by the indoor evaporator 7.

FIG. 2 shows a cross-sectional view of the integrated flow path switching valve 8 described above. 13 is an electric motor that constitutes a rotation driving means,
Reference numeral 14 is a speed reducer, and 15 is a position sensor. Reference numeral 16 denotes a rotor, which is incorporated in the housing 17 and is used for the electric motor 1.
The shaft 26 that rotates in response to the rotation of 3 rotates in the cylindrical space 17a of the housing 17. Rotor 16
12 is a perspective view of the housing 17, and FIG. 11 is a perspective view of the housing 17.
Shown in.

FIG. 5 shows a part of the view taken along the line CC of FIG.
2 and 5, the rotor 16 and the shaft 26 are coupled to each other by connecting the pin 27 press-fitted to the shaft 26 to the rotor 1.
Since it is incorporated in the fitting portion 28 provided in 6, the rotation can be transmitted. The AA cross section and the BB cross section of FIG. 2 are shown in FIGS. In FIG. 3, the ports 22 and 20 can be communicated with each other in the positional relationship shown in the drawing by the first cutout portion 23 that constitutes the communication passage means provided in the rotor 16. When the rotor 16 rotates clockwise by 90 ° from the position shown in the drawing, the first cutout portion 23 will move to the port 22.
And 19 are connected. Also in FIG. 4, similarly, the flow passage is opened and closed by the second cutout portion 25 provided in the rotor 16 at a position shifted by 180 ° from the first cutout portion 23. In the positional relationship shown in the figure, the ports are not in communication with each other, but if they are rotated 90 ° counterclockwise from this state, the ports 24 and 18 will be in communication, and if they are further rotated 90 °, ports 24 and 21 will be in communication.

A groove 29 is provided on the outer peripheral portion of the rotor 16 and a sealing packing 30 is attached. Also,
O-ring grooves 40 and 41 are provided in the front plate 31, and O-rings 32 and 33 are attached to keep the inside airtight. Further, a cutout 3 is provided at the rear end of the rotor 16.
4 is provided and is in contact with the plate 36 assembled on the rear side of the cylindrical space 17a of the housing 17 via the balls 35, thereby enabling the smooth rotation of the rotor 16.

Next, the operation of the switching valve of this embodiment having the above structure will be described. In FIG. 1, reference numerals 18, 19, 20, 21, 22, 24, which show the pipe connecting portions, are first to sixth.
3 and FIG. 4 that form the opening of FIG. In the system shown in FIG. 1, the opening / closing valve 10 is opened during cooling, and the other valves 9, 11, 12 are opened.
Is closed. During heating, the valve 11 is open and the other valves 11 are all closed. Further, during dehumidification heating, only the valve 12 is open and the others are closed. When defrosting and dehumidifying, only the valve 9 is opened and the others are closed. The above is summarized as shown in FIG.

In the cooling mode, the circulation path of each mode is
Compressor 1 → valve 10 → outdoor heat exchanger 5 → throttle 6 → indoor evaporator 7 → accumulator 2 → compressor 1. In the heating mode, compressor 1 → indoor condenser 3 → throttle 4 → outdoor heat exchanger 5 → valve 11 → accumulator 2 → compressor 1. In the dehumidifying and heating mode, compressor 1 → indoor condenser 3 → throttle 4 → outdoor heat exchanger 5 → valve 12 → indoor evaporator 7 → accumulator 2 → compressor 1. In the defrosting / dehumidifying mode, compressor 1 → indoor condenser 3 → valve 9 → outdoor heat exchanger 5 → throttle 6 → indoor evaporator 7 → accumulator 2 → compressor 1.

The opening and closing of the valve in the above system is shown in FIG.
Explaining the connection and disconnection of each port with reference to FIG. 4,
In the positional relationship shown in FIGS. 3 and 4, the ports 22 and 20 communicate with each other and all other ports are closed. That is, in FIG. 1, only the valve 12 is open, which corresponds to the state during dehumidification heating. Here, from the positional relationship of FIG. 3 and FIG.
When rotated by a degree, the AA arrow view is in the state of FIG. 8A and the BB arrow view is in the state of FIG. 8B, the ports 24 and 18 are in communication, and all other ports are closed. This corresponds to defrosting / dehumidifying with only the valve 9 open in FIG.
When the rotor 16 further rotates counterclockwise by 90 ° from here, the AA arrow view is in the state of FIG. 9A, and the BB arrow view is in the state of FIG. 9B, and the ports 24 and 21 communicate with each other. And the other ports are closed. This is a state in which only the valve 10 is open in FIG. 1 and corresponds to the above-described cooling. When the rotor 16 further rotates counterclockwise from this state by 90 °, the AA arrow view is shown in FIG. 10A, and the BB arrow view is shown in FIG.
The state becomes 0 (b), the ports 22 and 19 communicate with each other, and the others are all closed. This is a state in which only the valve 11 is open in FIG. 1 and corresponds to heating. As described above, by rotating the rotor 16 every 90 °, communication between ports can be switched, and each mode of cooling, heating, dehumidifying and heating, and defrosting / dehumidifying can be switched.

Here, the cutouts 23 and 25 are shown as the communication means formed in the rotor 16 for communicating the respective ports, but an L-shaped opening passage 45 as shown in FIG. 13 has the same function. Obtainable. The rotation of the rotor 16 is performed by energizing the motor 13 to transmit torque to the shaft 26 via the speed reducer 14. Moreover, the rotation angle of the rotor 16 can be detected by a known position sensor 15 such as a potentiometer, and the rotor 16 can be stopped at a predetermined position. When stopped, the rotor 16 can be maintained in a stopped state due to the resistance of the speed reducer 14 even if the rotor 16 receives a force due to the dynamic pressure of the refrigerant or external vibration.

As described above, by using the integrated flow path switching valve 8 of the present invention, a heat pump type air conditioner having a simple piping structure and a small size and excellent mountability on a vehicle can be obtained. Can be realized. In the above embodiment, the rotor 16 is provided with two notches forming the flow path, and the housing 17 is provided with six ports. By changing the number, it is possible to provide a flow path switching valve having more functions, and thus it is possible to provide an air conditioning system having more functions.

[Brief description of drawings]

FIG. 1 is a system configuration diagram of a heat pump type air conditioner suitable for applying the flow path switching valve of the present invention.

FIG. 2 is a vertical sectional front view showing a flow path switching valve as an embodiment of the present invention.

3 is a cross-sectional view taken along the line AA of FIG.

FIG. 4 is a sectional view taken along line BB of FIG.

5 is a sectional view taken along line CC of FIG.

FIG. 6 is a system configuration diagram of a conventional heat pump type air conditioner.

FIG. 7 is a diagram illustrating each operation mode and the open / closed state of each valve.

FIG. 8 is a cross-sectional view for generally explaining the structure and operating state of a typical cross section of the flow path switching valve of the present invention.

FIG. 9 is a cross-sectional view for generally explaining the structure and operating state of a typical cross section of the flow path switching valve of the present invention.

FIG. 10 is a cross-sectional view for generally explaining the structure and the operating state of a typical cross section of the flow path switching valve of the present invention.

FIG. 11 is a perspective view of a housing.

FIG. 12 is a perspective view of a rotor.

FIG. 13 is a diagram showing another embodiment.

[Explanation of symbols]

 13 Electric Motor 15 Position Sensor 16 Rotor 17 Housing 17a Cylindrical Space 18 to 22, 24 Port (Opening) 23 First Notch (First Communication Channel Means) 25 Second Notch (Second) Communication channel means)

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Mitsuo Inagaki 14 Iwatani, Shimohakaku-cho, Nishio-shi, Aichi Japan Auto Parts Research Institute (72) Inventor Nobuaki Ando 14 Iwatani, Shimohakaku-cho, Nishio-shi, Aichi Shares Within Japan Auto Parts Research Institute

Claims (4)

[Claims] 1. A housing having a cylindrical space therein and having a plurality of openings that are opened in a radial direction to form a flow path, and freely rotatable in the cylindrical space of the housing. Is provided with a plurality of communication flow passage means for forming flow passages at predetermined positions in the axial direction and the circumferential direction, and is stopped at a predetermined position in the cylindrical space, The rotor includes a rotor that forms a flow path that allows the plurality of openings to selectively communicate with each other by the plurality of communication flow path units, and a rotation drive unit that rotationally drives the rotor and stops the rotor at a predetermined position. A flow path switching valve characterized in that 2. A plurality of communication flow path means of the rotor are first and second communication flow path means provided at positions separated by a predetermined amount in both the axial direction and the circumferential direction. Item 1. The flow path switching valve according to item 1. 3. The passage switching valve according to claim 1, wherein the plurality of communication passage means of the rotor are a plurality of cutout portions formed in the rotor. 4. A compressor, an outdoor heat exchanger, a first indoor heat exchanger, a second indoor heat exchanger, a first pressure reducing means, a second pressure reducing means, and a closed circuit connecting them. A heat pump type air conditioner comprising a refrigerant pipe to be formed, wherein the plurality of openings of the flow path switching valve are the first to sixth openings, and the first opening is the above-mentioned It is connected to the refrigerant pipe that connects the first indoor heat exchanger and the first pressure reducing means, and the second opening is on the suction side of the second indoor heat exchanger and the compressor. And the third opening is connected to the refrigerant pipe connecting the second pressure reducing means and the second indoor heat exchanger, The fourth opening connects the discharge side of the compressor and the first indoor heat exchanger to each other. Is connected to a medium pipe, the fifth opening is connected to the refrigerant pipe that connects the outdoor heat exchanger and the second pressure reducing means, and the sixth opening is It is connected to the refrigerant pipe connecting the first decompression means and the outdoor heat exchanger, and the first to sixth openings are formed in the rotor of the flow path switching valve. A heat pump type air conditioner configured to selectively switch the circulation paths of the components of the closed circuit by being selectively communicated by the communication flow path means.