JPH047409Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a four-way valve used, for example, in an air conditioner system capable of heating and cooling.

[Conventional technology]

Conventional four-way valves of this type include the one shown in Japanese Utility Model Application Publication No. 14555/1983. (See Figure 7) In other words, in this four-way valve, a switching valve 4 is rotated around a passage 5 by an electromagnetic coil 1 via a plunger 2 and an operating plate 3, opening and closing passages 6 and 7, and opening and closing passages 8 and 8.
In some cases, higher pressure and higher temperature refrigerant is passed between passages 7 and 6.
- Cooling is achieved by passing through the passage 5, and sometimes heating is achieved by passing through the passage 6 - passage 7 - passage 5.

To explain this with reference to FIG. 8, during cooling, the refrigerant drawn out from the compressor 9 passes through the passage 8 - passage 7 - condenser 10 - capillary 11 - evaporator 12 and acts as a cooling agent. and returns to the compressor 9 through the The air passes through the compressor 9, which acts as a heating device, and returns to the compressor 9 via passages 7 and 8.

[Problem that the invention attempts to solve]

However, in such a switching valve, high-pressure, high-temperature refrigerant is applied to the outer periphery of the switching valve 4 and presses the switching valve 4 against the bottom surface of the case 13, so the switching valve does not operate smoothly and the switching is difficult. In order to facilitate this, it was necessary to make the electromagnetic coil 1 large in size.

[Means for solving problems]

This proposal was devised to solve the above problems.According to this proposal, the first passage, the second passage, and the third passage are arranged on a circular base at approximately the apex positions of a triangle. and the third passage is a common passage, the box-shaped body rotates around the common passage, selectively switches between the first passage and the second passage, and has a bleed port on the top surface. a rotary communication body, a cover that covers the base and has a fourth passage through which the pressure fluid passes is provided on the rotary communication body, and a cover that normally closes the bleed port and the first passage. A rotating frame having a small stopper for opening the bleed port is provided immediately before switching between the bleed port and the second passage. The problem is solved by regulating the rotation of the frame so as to correctly switch between the first passage and the second passage, and providing a support frame for supporting the rotation frame and the rotation body.

[Effect]

Since the present invention is configured as described above, when the actuating part is not operated, the rotating body and the rotating frame do not rotate, and therefore the rotating connecting body does not rotate, and for example, the first passage and the third passage do not rotate. The first passage is covered and the second passage is left open.
For this reason, pressure fluid flows into the cover from the fourth passage,
From the second passage, the passage passes through a predetermined route to the first passage, further passes through the rotary communication body to the third passage, and from this passage returns to the fourth passage.

However, when the rotating body is rotated by operating the operating part, the rotating frame rotates and the small stopper opens the bleed port of the rotating frame, and the pressure fluid flowing into the cover is circulated through the bleed port. By flowing into the rotary communicating body and balancing the pressure inside and outside the rotary communicating body, the rotary communicating body easily rotates, covering the second passage with the rotary communicating body and opening the first passage. , to switch the desired pressure fluid.

〔Example〕

The present invention will be explained below with reference to an embodiment shown in the drawings. 21 is a circular base, 22 is a cover that covers this base, and this base is filled with pressure fluid (refrigerant).
A first passage 23, a second passage 24, and a third passage 25 through which the passages pass are formed so as to form the vertices of a triangle, respectively. A pipe 26 is connected to the first passage 23, a pipe 27 is connected to the second passage 24,
Further, pipes 28 are connected to each of the third passages. However, these pipes are connected to the path of the cooling system. This cooling system will be described later.

Further, in FIG. 2, only the base and the arrangement of each passage are shown to avoid complicating the drawing.

The cover 22 has an operating portion 29 on its outer periphery. In the illustrated case, the operating portion 29 is an electromagnet, and by energizing the coils 30 and 31, the U-shaped iron piece 32 is magnetized.

The cover 22 is provided with a fourth passage 33 through which pressure fluid is introduced into the cover 22, and a pipe 34 is connected to this passage.

In such a configuration, pipe 34 is connected to the discharge side of the compressor shown in FIG. 8, pipe 28 is connected to the suction side of the compressor, pipe 26 is connected to the evaporator,
Also, the pipes 27 are connected to the condensers respectively.

Next, in FIGS. 3, 4, and 5, the base 21 has legs 36, 3 spaced apart from each other.
It is fixed via 7. In this embodiment, this support frame has a substantially rhombic shape and has a pin 38 projecting from its center. A U-shaped rotating body 39 is rotatably attached to this pin 38.
Magnets 40 and 41 are fixed to both end faces of the rotating body 39.

A rotating frame 42 is inserted between the rotating body 39 and the support frame 35 so as to be substantially orthogonal to the rotating body 39, and is supported by the pin 38 so as to be rotatable. This rotating frame 42 is provided with cutouts 43 and 44 facing each other,
The rotating body 39 is held between these cut and raised portions 43 and 44. In this manner, when the rotating body 39 rotates as will be described later, the rotating frame 42 rotates together with the rotating body 39 via the cut and raised portions 43 and 44.

At one end of the rotating frame 42, legs 45 and 46 facing downward in the figure are provided spaced apart from each other.

A rotary communication body 47 having a box-like cross section and open on the base side is provided between the rotary frame 42 and the base 21. This rotating communication body 47 covers the third passage and has a length such that it can switch between the first passage 23 and the second passage 24 when rotated as will be described later.
Its width is designed to be slightly smaller than the distance between the legs 45 and 46 of the rotating frame 42. A stepped portion 48 is provided on the inner side of the upper surface of the rotary communication body 47 at a portion facing the third passage 25, and a stepped portion 49 is also provided in the third passage 25 so as to oppose this stepped portion 48. A pipe 50 roughly divided in half (sixth
) is inserted so that the rotation communication body 47 rotates around this tube 50.

A bleed port 51 penetrating vertically is provided on the upper surface of the rotary communication body 47 on the side far from the pipe 50. However, this bleed port 51 is normally closed by a small plug 52 provided on the rotating frame 42.

Further, the mutual sliding surfaces of the rotary communication body 47 and the base 21 are sufficiently finished to prevent pressure fluid from leaking.

Since the present invention is configured as described above, the iron piece 32 is magnetized by energizing the coils 30 and 31, and accordingly the rotating body 39 having the magnets 40 and 41 rotates, and further the rotating frame 42 is rotated. The rotation communication body 47 rotates through the passageway to cover the first passage 23 and the second passageway 23.
Considering the case where the second passage 24 is open, the high-temperature, high-pressure refrigerant discharged from the discharge side of the compressor is supplied into the cover 22 from the pipe 34, and the second passage 24, which is open at this time, is supplied into the cover 22. 27 to the condenser, further passes through a capillary and an evaporator to perform the desired cooling, returns from the pipe 26 to the first passage 23, passes through the rotary communication body 47, passes through the pipe 50, and enters the third passage 25. It is introduced into the suction side of the compressor through the lead pipe 28.

Next, when the coils 30 and 31 are energized in the opposite direction, the rotating body 39 rotates in the opposite direction.
The rotation frame 42 also rotates in the opposite direction to the above-mentioned direction via the cut and raised portions 43 and 44. However, at the beginning of this rotation, the leg portion 46 of the rotation frame 42 comes into contact with the side surface of the rotation communication body 47. In other words, the rotation communication body 47 does not rotate until the two come into contact. Therefore, the small stopper 52 provided on the rotating frame 42 also moves, opening the bleed port 51 of the rotating communication body 47, which had been closed until then.

Therefore, the high-pressure and high-temperature refrigerant introduced into the cover 22 as described above is introduced into the rotary communication body 47 through this bleed port 51, and
7 has the same pressure inside and outside. Therefore, the rotation communication body 47 becomes easy to rotate, and as the rotation body 39 further rotates, the rotation communication body 47 is moved to the pipe 5 via the rotation frame 42.
0 as an axis, and with one side of the rotation communication body 47 in contact with one leg 36 of the support frame 35, the rotation communication body 47 closes the second passage 24 and closes the second passage 24. 1 passage 23 is opened. In this way, even if one side of the rotation communication body 47 comes into contact with the leg 36 and stops, the rotation frame 42 is rotated slightly by the rotation body 39, so the inside of one leg 45 of the rotation frame 42 rotates. While separating from the dynamic communication body 47, the small stopper 52 closes the bleed port 51 again. In other words, the positions of the legs are selected so that the small stopper 52 closes the bleed port 51 in a state where the rotary communication body 47 is connected to the legs of the support frame 35 and stopped.

Thus, as described above, the high temperature and high pressure refrigerant discharged from the discharge side of the compressor is supplied into the cover from the pipe 34, and the first passage 23, which is open at this time,
It passes through the pipe 26 to the evaporator (which acts as a condenser at this time) to provide the desired heating, and then to the capillary.
Returns from the pipe 27 to the second passage 24 through the condenser (acting as an evaporator at this time), and returns to the rotary communication body 4.
7, passes through a pipe 50, reaches the third passage 25, and is introduced from a pipe 28 into the suction side of the compressor.

In the above embodiments, the actuating portion 29 is an electromagnet, but a simple iron piece may also be used, and in this case, the iron piece may be rotated manually.

[Effect of idea]

As described above, the present invention has the advantage that the rotating communication body is provided with a bleed port that is normally closed and opens at the beginning of the rotation, so that the rotation is easy and the operating part can be small.

[Brief explanation of the drawing]

Fig. 1 is a perspective view of the entire embodiment of the four-way valve of the present invention, Fig. 2 is a perspective view of only the base, Fig. 3 is an exploded perspective view of each part with the cover and operating part removed, and Fig. 4 is a perspective view of the entire embodiment of the four-way valve. A perspective view with the cover and the operating part removed; FIG. 5 is a sectional view taken along the - line in FIG. 4;
FIG. 6 is a perspective view of a pipe for connecting the rotary communication body and the third passage, FIG. 7 is a schematic sectional view of a conventional four-way valve, and FIG. 8 is a system diagram of a cooler. 21...Circular base, 22...Hippo, 23...
...First passage, 24... Second passage, 25... Third passage, 33... Fourth passage, 35... Support frame, 39... Rotating body, 42... Rotating frame, 47 ……
Rotating communication body, 51... Bleed port, 52...
Small stopper.

Claims (1)

[Scope of utility model registration request] The first passage, the second passage, and the third passage are arranged in a circular base so that they are approximately at the apex position of a triangle, and the third passage is made a common passage, and the rotation is made around this common passage. A box-shaped rotating communication body is provided that selectively switches between the first passage and the second passage and has a small diameter bleed port on the top surface, and covers the base and allows pressure fluid to pass through a part. A cover having a fourth passage is provided, and a small stopper is provided on the rotating communication body to normally close the bleed port and open the bleed port immediately before switching between the first passage and the second passage. A rotating frame is provided, and this rotating frame is rotated by a rotating body that is rotated by an operating part outside the cover, and the rotation of the rotating frame is regulated so as to correctly switch between the first passage and the second passage. A four-way valve, further comprising a rotating frame and a support frame for supporting the rotating body.