JP2001066021A - Accumulator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain an accumulator disposed in the prestage of a compressor in the refrigeration cycle of a heat pump type refrigerating machine in which manufacturing cost is reduced by integrating the accumulator with a four-way valve thereby reducing the size and thickness of an outdoor unit and simplifying the piping. SOLUTION: An inlet to be coupled with the high pressure side of a compressor, and an outlet to be interconnected with the low pressure side of the compressor are provided in the side of a body 11. A valve is contained in the body 11 and a four-way valve 10 having first and second openings being interconnected selectively with the outlet opens the outlet and the first and second openings into a container 51. The outlet is brought into open state and the first and second openings are blocked from the inner space of the container 51 and interconnected, respectively, with coupling pipes 61, 62 thus jointing the body 11 integrally with the container 51.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a heat pump refrigerating machine used for an air conditioner which also performs cooling and heating by switching the circulation direction of a refrigerant, and relates to an accumulator which is connected in front of a compressor of the refrigerating cycle. is there.

[0002]

2. Description of the Related Art A heat pump refrigerating machine used for an air conditioner is provided with a four-way valve in a refrigerating cycle of a refrigerant circulating between an indoor heat exchanger and an outdoor heat exchanger, and performs a cooling operation and a heating operation. It is configured to switch the circulation cycle of the refrigerant. Further, in order to prevent the liquid refrigerant from being sucked into the cylinder of the compressor, an accumulator for separating gas and liquid is connected in front of the compressor, and in general, the refrigeration cycle of such a heat pump refrigerator has It is configured as shown in FIG.

In FIG. 5, a four-way valve 10 is connected to a refrigeration cycle of a refrigerant circulating between an indoor heat exchanger 1 and an outdoor heat exchanger 2 during operation of a compressor 3, and a suction port 31 of the compressor 3 is provided.
Is connected to the accumulator 5. The four-way valve 10 has an inlet 12 on the side of the cylindrical main body 11 and an outlet 14 on the side facing the inlet 12, the inlet 12 being on the high pressure side of the compressor 3, and the outlet 14 being compressed. Machine 3 is connected to the low pressure side. A first port 15 and a second port 16 are opened adjacent to both sides of the outlet 14, and the first port 15 is connected to the indoor heat exchanger 1.
The second connection port 16 is connected to the outdoor heat exchanger 2 for piping. The plugs 18 are joined to both left and right open ends of the main body 11, and one of the plugs 18 has a suction port 26, and the other plug 18 has a suction port 2.
7 is open.

A valve seat 20 is joined to the inner wall of the main body 11, and a valve body 24 that slides on the surface of the valve seat 20, and a pair of pistons 22 are movably housed in the main body 11 with the valve body 24 interposed therebetween. The two pistons 22 are connected by a connecting plate 23 fitted with 24, and the valve element 24 is driven in conjunction with the movement of the piston 22. Outside the pistons 22, a valve portion 28 for switching the opening and closing of the suction ports 26 and 27 by coming into contact with and away from the plug 18 is formed.

The three-way switching valve 4 having one of the three directions communicating with the outlet port 14 has the other two directions connected to the suction port 26 and the suction port 26, respectively.
27. The three-way switching valve 4 switches between the low pressure side outlet 14 and the other direction when the electromagnetic coil 41 is turned on and off to communicate with one another.
7 communicates with the outlet 14, the pressure on the suction port 27 side is reduced to suck the piston 22, and the outlet 14 and the second communication port 16 are formed in the internal space formed by the concave portion 25 of the valve body 24. In communication, the refrigerant circulates in the order of the compressor 3, the inlet 12, the first outlet 15, the indoor heat exchanger 1, the outdoor heat exchanger 2, the second inlet 16, and the outlet 14, thereby performing a heating operation. (The state of FIG. 5). On the other hand, the three-way switching valve 4 is switched to switch the other intake port 2
6 and the outlet 14, and the piston 2 is connected to the suction port 26 side.
2, the valve body 24 moves on the valve seat 20 and the recess 25
The outlet 14 communicates with the first through port 15 so that the refrigerant flows through the compressor 3, the inlet 12, the second through port 16, the outdoor heat exchanger 2,
The cooling operation is performed by circulating in the order of the indoor heat exchanger 1, the first passage 15, and the outlet 14. As described above, by switching the electromagnetic coil 41 of the three-way switching valve 4 on and off, the piston 22 is sucked to drive the valve element 24, and the outlet port 14 and the first through port 1
5. The circulation direction of the refrigerant is switched by selectively communicating with one of the second communication ports 16.

The accumulator 5 is formed by a closed vessel 51, and a refrigerant inlet pipe 52 on the upper surface is connected to the outlet 14 of the four-way valve 10. A separation plate 55 for separating gas and liquid is stretched inside the container 51, and an outlet pipe 53 whose upper end is raised to a position close to the separation plate 55 is led out from the lower surface, and this outlet pipe 53 is connected to a suction port of the compressor 3. The gas refrigerant separated by the separation plate 55 is connected to the cylinder of the compressor 3 through the outlet pipe 53.

[0007]

In the heat pump type air conditioner of the refrigeration cycle described above, since the components such as the outdoor heat exchanger 2, the compressor 3, the four-way valve 10, and the accumulator 5 are piped into the outdoor unit, these components are used. Therefore, it is difficult to reduce the size of the device because a space for storing the above members is required. Also,
The piping connection of each member is complicated, the workability of assembling is inferior, and the manufacturing cost cannot be reduced.

An object of the present invention is to solve these drawbacks, and the four-way valve 10 and the accumulator 5
By integrating, the outdoor unit is made smaller and thinner,
An object of the present invention is to simplify piping connections and to reduce manufacturing costs.

[0009]

According to a first aspect of the present invention, an outlet pipe connected to a suction port of a compressor is provided in front of a compressor of a refrigeration cycle of a heat pump type refrigerator. In the accumulator derived from the lower surface, either the inlet connected to the high-pressure side of the compressor, the outlet connected to the low-pressure side of the compressor, or the valve housed in the main body, the outlet connected to the side of the main body The first that selectively communicates with either
The four-way valve with the opening of the opening and the second opening is opened to the outlet, the first opening and the second opening in the container, the outlet is opened, and the first opening and the second opening are opened. The main body is joined to the container so as to be integrally formed with the container by communicating with the respective connection pipes that are isolated from the internal space of the container and connected to the container.

According to a second aspect of the present invention, the four-way valve is formed integrally with the accumulator by joining the main body to the upper surface of the container.

With the above construction, the refrigerant circulating in the refrigeration cycle flows directly into the container from the outlet, and the piping from the four-way valve to the accumulator is omitted to simplify the piping connection. By integrating and accumulator into a module, the installation space can be saved.

[0012]

Embodiments of the present invention will be described below with reference to the drawings. FIGS. 1 to 4 show an embodiment of an accumulator according to the present invention. The same reference numerals as those in the previous example denote the same components and members, and their functions and functions are the same. The accumulator 5 includes a closed container 51.
The two outlet pipes 53 are led out from the lower surface of the compressor and connected to a two-cylinder compressor. The two-cylinder compressor operates with two cylinders to increase the starting capacity and shorten the start-up time. Each outlet tube 53 is connected to a respective cylinder. A separation plate 55 for separating the liquid refrigerant from the refrigerant is provided in an upper layer in the container 51, and an outlet hole 56 for dropping the separated liquid refrigerant is opened along the outer periphery of the separation plate 55 to remove impurities in the refrigerant. A mesh filter 57 is provided to cover the upper surface of the separation plate 55. The upper end of each outlet pipe 53 is raised up to a position close to the separation plate 55.

A four-way valve 10 interposed in a refrigerant refrigeration cycle
Is formed by joining the plugs 18 to the left and right opening ends of the cylindrical main body 11, and the main body 11 is joined to the upper surface of the container 51 to be integrated with the accumulator 5. An inlet 12 connected to the high-pressure side of the compressor is opened on a side of the main body 11, and an outlet 14 is opened on a side facing the inlet 12;
The first port 15 and the second port 1 are adjacent to both sides of the outlet 14.
6 is open. Outlet 14, first outlet 15, second
A hole is opened in the upper surface of the accumulator 5 at a position suitable for the opening 16, and the four-way valve 10 is connected to the accumulator 5 with the outlet 14, the first opening 15, and the second opening 16 opened in the container 51. It is integrally joined to the upper surface.

Outlet 14, first outlet 15, second outlet 16
A flat plate-shaped valve seat 20 having an opening at a position suitable for the body is joined to the inner wall of the main body 11, and a valve body 24 having a concave portion 25 having an arc-shaped cross section is slidably and slidably on the surface of the valve seat 20. 1
1, the valve body 24 communicates the outlet 14 and the first through port 15 at one end of the movement range on the surface of the valve seat 20 in the internal space formed by the concave portion 25, Outlet 1 by position
4 and the second communication port 16 are set to communicate with each other.

The conduit 42 in one of the three directions is connected to the container 5
The three-way switching valve 4 which is inserted into and communicates with the first one is attached to the four-way valve 10 with a predetermined metal fitting, and the other two directions are piped to the plug 18 and connected to the respective suction ports.

A connection pipe 63 connected to the high pressure side of the compressor is connected to the inlet 12, and the outlet 14 opens into the container 51 and is open. Accumulator 5
A connection pipe 61 connected to the indoor heat exchanger and a connection pipe 62 connected to the outdoor heat exchanger are connected to the upper surface of the container 51 by opening into the container 51, and a partition wall 58 provided inside the upper surface of the container 51.
A pair of communication passages 59 that are isolated from the internal space of the container 51 are formed by the communication passages 59, and the first communication port 15 and the connection pipe 61 are formed by the communication passages 59.
The second communication port 16 and the connection pipe 62 communicate with each other.

Next, the operation of the accumulator 5 will be described. One way of the three-way switching valve 4 is that the conduit 42 communicates with the inside of the container 51 and the outlet 14 is open into the container 51. Communicating with the low pressure side of the machine. Accordingly, the valve 24 is driven by switching the electromagnetic coil 41 on and off in the same manner as in the previous example, and the outlet 14 and the first passage 15 are formed in the internal space formed by the recess 25 of the valve 24.
And the refrigerant is supplied to the compressor, the inlet 12, the second port 1
6, outdoor heat exchanger, indoor heat exchanger, first opening 15,
The cooling operation is performed by circulating in the order of the outlet 14, while the three-way switching valve 4 is switched to drive the valve element 24, and the outlet 14 and the second through-hole 16 are communicated. Mouth 1
2, the first passage 15, an indoor heat exchanger, an outdoor heat exchanger,
The heating operation is performed by circulating in the order of the second passage 16 and the outlet 14. As described above, the valve element 24 is driven by switching the electromagnetic coil 41 of the three-way switching valve 4 on and off, and the valve element 24 is positioned at one end and the other end of the movement range on the valve seat 20 surface, and the outlet port is set. 14 is selectively communicated with one of the first through-hole 15 and the second through-hole 16, and the refrigerant circulation direction is switched between the cooling operation and the heating operation.

The refrigerant flowing into the upper layer of the container 51 from the outlet 14 is subjected to removal of impurities in the refrigerant by the filter 57, the flow is deflected by the separator 55, and the liquid refrigerant flows out of the outlet 56.
From the outlet pipe 5 and only the gas refrigerant having a small inertia force
3, and is supplied to each cylinder of a two-cylinder compressor and circulated.

The present invention is not limited to the embodiment, and the accumulator may have a single outlet pipe 53 for connecting to a one-cylinder compressor. The four-way valve 10 may be integrally formed by joining the main body 11 to the upper side wall of the 51.

[0020]

As described above, according to the accumulator of the present invention, the four-way valve 10 provided in the refrigeration cycle has the outlet 14 directly opened in the container 51, and the main body 11 is connected to the container 51.
The refrigerant circulated through the indoor heat exchanger and the outdoor heat exchanger flows directly into the container 51 from the outlet port 14, and piping from the four-way valve 10 to the accumulator is formed. It is short-circuited, the piping connection is simplified, the assembling workability is excellent, and the manufacturing cost can be reduced. Also,
The four-way valve 10 and the accumulator are pre-integrated and modularized for convenient handling, and the installation space is reduced compared to the conventional individually piped one, and the outdoor unit is made smaller and thinner. Can be realized.

The first and second communication ports 15 and 16 are connected to respective connection pipes 61 and 62 connected to the container 51 while being isolated from the internal space of the container 51.
Thus, the pipe connection with the indoor heat exchanger and the outdoor heat exchanger can be easily performed.

Further, by joining the main body 11 to the upper surface of the container 51 and forming the four-way valve 10 integrally with the accumulator, the refrigerant can flow directly into the upper layer of the container 51 from the upper surface of the accumulator. Further, by attaching the three-way switching valve 4 to the four-way valve 10, it becomes possible to integrate these members extremely compactly.

[Brief description of the drawings]

FIG. 1 is a partially cutaway front view of an embodiment of the present invention.

FIG. 2 is a plan view.

FIG. 3 is a side sectional view.

FIG. 4 is a sectional view of a main part.

FIG. 5 is a piping diagram of a refrigeration cycle of the heat pump refrigerator.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 11 Main body 10 Four-way valve 12 Inlet 14 Outlet 15 First port 16 Second port 24 Valve body 3 Compressor 31 Suction port 51 Container 53 Outlet pipe 61, 62 Connection pipe

Claims (2)

[Claims] An outlet pipe (53) connected to a suction port (31) of a compressor (3) is provided in front of a compressor of a refrigerating cycle of a heat pump refrigerator, and an outlet pipe (53) is provided on a lower surface of a closed vessel (51). In the accumulator derived from, an inlet (12) connected to the high pressure side of the compressor and an outlet (1) connected to the low pressure side of the compressor are provided on the side of the main body (11).
4) a first valve body (24) housed in the main body (11), wherein the outlet port (14) is selectively communicated with one of the outlet port (14);
Four-way valve (1) with an opening (15) and a second opening (16)
0), the outlet (14), the first outlet (15), the second outlet (16)
Is opened in the container (51), the outlet (14) is opened, and the first through-hole (15) and the second through-hole (16) are connected to the container (5).
The connection pipes (61) and (62), which are isolated from the internal space of 1) and connected to the container (51), communicate with the main body (1).
An accumulator in which 1) is joined to a container (51) to be integrally formed. 2. The accumulator according to claim 1, wherein the main body is joined to the upper surface of the container.