JPH058153U - Reversible valve - Google Patents

Abstract

(57) [Summary] (Correction) [Purpose] The same electric mode can be used to control whether the refrigerant flows in the forward direction or in the reverse direction, improving usability and expanding the field of application. [Structure] A valve body is provided with two chambers 1 in a valve body 1 provided with communication ports 2a and 2b which act as inflow and outflow ports of high-pressure refrigerant.
A float assembly 3 slidable in the axial direction is provided so as to be divided into 1 and 12. Next, the pilot that opens and closes the main port is composed of the pilot chamber 4, the needles 4a and 4b, and the movable iron core 5, and the movable iron core causes the pilot chamber 4 to move.
And the communication with the chamber 14 of the movable iron core. Further, the seal member 7 and the seal portion 7a are provided in the float assembly, and the through opening 13 having the ball 8 is provided.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

  The present invention relates to a reversible valve used in a multi-type heat pump for air conditioning equipment. In particular, the refrigerant circulation to the indoor unit during cooling and heating of one room of the multi-air conditioner It relates to a reversible valve for controlling.

[0002]

[Problems to be solved by the prior art and device]

  The conventional reversible valve has two floats, a high pressure and low pressure outlet. There were things such as those that were necessary and that the electric mode was reversed in the normal and reverse directions of the refrigerant flow. . However, the one using two floats is complicated and expensive. And the pressure loss will increase and the flow rate will decrease. There was a drawback. For reversible valves that require high pressure and low pressure outlets, Requires low-pressure piping, and the installation position is naturally decided. However, it has a drawback in that it is inferior in general versatility and requires labor for piping. Also, The air mode reverses in the forward and reverse directions of the flow of the refrigerant, for example, the positive direction is energized. "Open" when not energized, "Closed" when de-energized, and "closed" when energized in the opposite direction and "Open" when de-energized In the check valve, the flow of the refrigerant cannot be stopped and the electric mode is reversed. Therefore, there were drawbacks such as poor usability. That is, for example, using a four-way valve In the heat pump type refrigerant circuit, when the four-way valve is ON, it is from the forward direction and when it is OFF When the flow direction of the refrigerant is decided, such as from the opposite direction, It is easy to open and close the reversible valve, but if not, use two ports. The direction of flow can be determined by attaching a sensor to the Had to be sensed, which was troublesome.

[0003]   Therefore, the object of the present invention is to solve the above-mentioned problems of the prior art and to improve the usability. It is to provide a good reversible valve that can be used in a wide range of fields.

[0004]

[Means for Solving the Problems]   To achieve the above object, the present invention provides a valve body and a fluid inlet and outlet for the valve body. Two conducting ports to be served and a pilot chamber provided so as to communicate with the two conducting ports , A float assembly provided in the valve body, and a solenoid having a movable iron core. In a reversible valve consisting of a renoid coil, one float assembly is a valve It is slidable in the body in the axial direction of the valve body and is installed so as to divide the valve body into two chambers. And the float assembly provides continuity between the two chambers at the sealed position within the valve body. A first sealing element for closing and a second closing element for closing the conduction between the two conducting openings at the sealing position And a pilot room having a movable iron core and a seal element of Is provided to control the opening and closing of the communication of the A passage is provided which connects two chambers out of the two chambers with chambers not opened, Two needles that independently open and close the communication between the two communication ports and the pilot chamber Is installed inside the valve body at positions other than the seal position of the float assembly. There is an opening that connects the two chambers of the float assembly to the seal position. Disclosed is a reversible valve having elastic means for eccentricity.

[0005]

【Example】

  Embodiments of the present invention will be described below with reference to the drawings.   An embodiment of the reversible valve according to the present invention is shown in FIG. In FIG. 1, 1 is a valve body, Reference numerals 2a and 2b are conducting ports that function as inflow / outflow ports of the high-pressure refrigerant. 3 is a flow In the valve assembly 1, the valve assembly 1 is divided into two chambers 11 and 12 by a toy assembly. It is slidable in the axial direction, and together with the valve body 1 and the communication ports 2a and 2b, Control the flow of the refrigerant. Pilot opening and closing the main port Is composed of a pilot chamber 4, two needles 4a and 4b, and a movable iron core 5. , The needle 4a opens and closes the communication between the pilot chamber 4 and the conduction port 2a, and the needle 4b Opens and closes the communication between the pilot chamber 4 and the communication port 2b, and the movable iron core 5 is a solenoid coil. Is moved by the valve 6 to open and close the communication between the pilot chamber 4 and the movable iron core chamber 14. Is configured. Inside the valve body 1 divided by the float assembly 3 The upper chamber 11 of the two chambers is connected to the chamber 14 of the movable core through the opening 10. There is.

[0006]   The float assembly 3 is connected to the inner wall of the valve body 1 at the lowermost position of the valve body 1. Upper chamber 11 and lower chamber 1 in the valve body through the gap with the float assembly 2 has a sealing member 7 that cooperates with the inner wall of the valve body 1 to close the connection with 2. , At the lowermost position of the float assembly 3, the guide port 2a and the guide port 2b are guided. In order to close the passage, a seal portion 7a that cooperates with the inner wall of the valve body 1 is formed. In addition, In the funnel assembly 3, there is a through opening that penetrates the float assembly in the axial direction. A mouth 13 is provided, and a ball 8 for opening and closing the through opening 13 is housed therein. 9 Is a spring and is provided in the valve body 1 so as to push the float assembly 3 downward. There is.

[0007]   The operation of the reversible valve having the above structure according to the present invention will be described with reference to FIGS. Explain.   FIGS. 2 and 3 show the operation according to the embodiment of FIG. 1 when the high-pressure refrigerant flows in the forward direction. It is a figure which shows operation | movement of a check valve, FIG. 2 is a solenoid coil OFF, and FIG. The respective states of the reversible valve when the id coil is turned on are shown.

[0008]   In FIG. 2, since the solenoid coil is OFF, the movable iron core 5 moves downward. Therefore, the communication between the movable core chamber 14 and the pilot chamber 4 is closed. Also , The float assembly 3 is pushed downward by the force of the spring 9, and The communication between the upper chamber 11 and the lower chamber 12 is closed by the seal member 7, and the communication port The communication between the 2a and the conduction port 2b is closed by the seal portion 7a. Furthermore, the needle 4a is pressed against the left side of the drawing by the high pressure refrigerant from the conduction port 2a, The communication with the compartment 4 is closed.

[0009]   From this state, when the solenoid coil is turned on, as shown in FIG. The moving iron core 5 is pulled upward, and as a result, the pilot chamber 4 and the movable iron core chamber 14 are Conducts. Then, the refrigerant flows from the movable core chamber 14 into the pilot chamber 4, Since the high pressure refrigerant is exerted on the left side of the drawing on the needle 4a, the needle 4b Is pushed to the left side in the figure, and the refrigerant flows out from the pilot chamber 4 toward the conduction port 2b. Yes When the refrigerant flows out of the chamber 14 of the moving iron core, the pressure of the chamber 14 becomes low, and the pressure in the chamber 14 becomes low. Then, the high pressure refrigerant flows from the upper chamber 11 of the valve body into the chamber 14 of the movable iron core. Further When the refrigerant flows out of the upper chamber 11 of the valve body, this chamber 11 becomes a low pressure and the flow The spring 9 is pushed up by the pushing force of the high pressure refrigerant applied to the bottom surface of the assembly 3. The float assembly 3 is pushed upward by overcoming the pushing down force by the The main port that allows the high-pressure refrigerant to flow from the passage port 2a to the conduction port 2b opens. At this time , Part of the high-pressure refrigerant from the conduction port 2a penetrates through the float assembly. The ball 8 is pushed up through the opening 13, and the upper chamber 11, the opening 10, and the movable core chamber 14, a fluid path through the pilot chamber 4 and the needle 4b to the communication port 2b Form and flow.

[0010]   After that, when the solenoid coil is turned off, the movable iron core 5 goes down, The communication between the movable core chamber 14 and the pilot chamber 4 is closed. Movable iron core chamber 14 and bento The upper chamber 11 of the body is gradually increased in pressure by the high pressure refrigerant supplied through the through opening 13. Then, the high pressure refrigerant in the upper chamber moves the float assembly 3 downward together with the force of the spring 9. To the position where the seal portion 7a seals the valve body 1, that is, the float assembly. Push it down to the lower limit position of the assembly 3. As a result, from the conduction port 2a to the conduction port 2b The flowing main port is closed.

[0011]   FIG. 4 and FIG. 5 show the case where the high pressure refrigerant flows in the opposite direction according to the embodiment of FIG. It is a figure which shows operation | movement of a check valve, FIG. 4 is a solenoid coil OFF, and FIG. The respective states of the reversible valve when the id coil is turned on are shown.

[0012]   In FIG. 4, since the solenoid coil is OFF, as in the case of FIG. The movable iron core 5 is lowered downward, and the communication between the movable iron core chamber 14 and the pilot chamber 4 is It is closed. Also, the float assembly 3 is pushed downward by the force of the spring 9. The seal member 7 connects the upper chamber 11 and the lower chamber 12 in the valve body. And the communication between the conduction port 2a and the conduction port 2b is closed by the seal portion 7a. There is. Further, the needle 4b is pressed to the right side of the drawing by the high pressure refrigerant from the conduction port 2b. The communication with the pilot room has been closed.

[0013]   From this state, when the solenoid coil is turned on, as shown in FIG. The moving iron core 5 is pulled upward, and as a result, the pilot chamber 4 and the movable iron core chamber 14 are Conducts. Then, the refrigerant flows from the movable core chamber 14 into the pilot chamber 4, Since the high pressure refrigerant force is applied to the needle 4a on the right side of the drawing, the needle 4a Is pushed to the right side of the drawing, and the refrigerant flows out from the pilot chamber 4 toward the conduction port 2a. Yes When the refrigerant flows out from the chamber 14 of the moving iron core, the same principle as described with reference to FIG. 3 is used. The main port for flowing the high-pressure refrigerant from the conduction port 2b to the conduction port 2a opens. This At this time, part of the high pressure refrigerant from the conduction port 2b was provided in the float assembly. The ball 8 is pushed up through the through opening 13, and the upper chamber 11, the opening 10, the movable core Fluid flowing through the chamber 14, the pilot chamber 4, and the needle 4a to the communication port 2a It forms a path and flows.

[0014]   When the solenoid coil is turned off, the same principle as in the case of positive direction refrigerant flow Thus, the main port flowing from the conduction port 2b to the conduction port 2a is closed.

[0015]   In order to improve the movement of the float assembly 3 inside the valve body, The size of the float assembly 3 so that there is enough clearance for the fluid to flow between You can also set the law. Also at this time, at the lower limit position of the float assembly 3. In order to close the conduction between the conduction port 2a and the conduction port 2b, it cooperates with the inner wall of the valve body 1. It is necessary to provide the seal portion 7a for the float assembly.

[0016]   As described above, according to the present invention, even when the refrigerant flows in the forward direction, the refrigerant flows in the reverse direction. The same electric mode can be used for control, so it is easy to use and use The field can be expanded. Also, by using one float in the valve body The structure is simple and the flow rate can be increased.

[Brief description of drawings]

FIG. 1 is a schematic view showing an embodiment of a reversible valve according to the present invention.

FIG. 2 is a diagram for explaining the operation of the reversible valve according to the embodiment of FIG. 1, showing a state in which a high pressure refrigerant has flowed in a positive direction and a solenoid coil is OFF.

FIG. 3 is a diagram for explaining the operation of the reversible valve according to the embodiment of FIG. 1, and is a diagram showing a state in which a solenoid coil is turned on when high-pressure refrigerant flows in a positive direction.

FIG. 4 is a diagram for explaining the operation of the reversible valve according to the embodiment of FIG. 1, and is a diagram showing a state in which a solenoid coil is OFF when high-pressure refrigerant flows in the opposite direction.

5 is a diagram for explaining the operation of the reversible valve according to the embodiment of FIG. 1, and is a diagram showing a state in which a solenoid coil is turned on when high-pressure refrigerant flows in the opposite direction.

[Explanation of symbols]

1 valve body 2a Communication port 2b Communication port 3 float assembly 4 pilot room 4a needle 4b needle 5 movable iron core 6 solenoid coil 7 Seal member 7a Seal part 8 balls 9 springs 10 openings 11 Upper chamber 12 Lower chamber 13 Through opening 14 Movable iron core room

Claims (2)

[Scope of utility model registration request] 1. A valve body, two conducting ports for providing a fluid inlet / outlet of the valve body, a pilot chamber provided so as to communicate with the two conducting ports, and a pilot chamber provided in the valve body. In a reversible valve including one float assembly and a solenoid coil having a movable iron core, the one float assembly is slidable in the valve body in the axial direction of the valve body, and the inside of the valve body is divided into two chambers. Separately provided, the float assembly establishes a communication between a first sealing element closing a conduction between the two chambers at a sealing position in the valve body and a conduction between the two communication ports at the sealing position. A second sealing element for closing, wherein the movable iron core is provided so as to control opening and closing of communication between the room in which the movable iron core is housed and the pilot room, and the room in which the movable iron core is housed and the front A passage is provided that connects the two chambers in the valve body that do not open to the two communication ports, and that independently opens and closes the communication between the two communication ports and the pilot chamber. Two needles are provided, an opening is provided at a position other than the sealing position of the float assembly for connecting two chambers in the valve body, and an elastic means for biasing the float assembly toward the sealing position is provided. A reversible valve characterized in that 2. The reversible valve according to claim 1, wherein the float assembly has a gap between itself and an inner wall of the valve body so that a fluid can flow therethrough.