JPS6314263Y2 - - Google Patents

Description

[Detailed description of the invention] The present invention is a switching kit for a multi-room separate air conditioner; This invention relates to a switching kit for a multi-room separate air conditioner used to relay connections between rooms.

In general, the switching kit used in this type of multi-room separated air conditioner includes various electrical components such as refrigerant pipes with solenoid valves and relays for switching the connections. The front plate F of the main body casing H, which is thin as shown in FIG. On the side, electrical parts E consisting of functional parts such as relays and timers and terminal boards, etc.
is installed on the side surface of the outdoor unit A using a mounting piece G provided on the back surface of the casing H, and a connecting pipe R is connected to the refrigerant pipe, and the outdoor unit A and a plurality of indoor units are connected through these connecting pipes. It is formed as if it were connected.

However, the conventional switching kit, as mentioned above,
The piping set S and the electrical component E are arranged in parallel in the horizontal direction, and the front plate F is opened to perform service and wiring work on the electrical component E from the front. If the direction is limited to the front, and due to the installation circumstances of outdoor unit A, the side surface on which the switching kit is installed is facing a wall or screen of the building, and the distance between them is narrow, it may be difficult to perform service or wiring. There is a problem that the workability becomes very poor, and in order to ensure good workability, a certain work space is required in front of the front plate F, and as a result, the installation position of the outdoor unit A is changed. There were also problems with restrictions.

Furthermore, in the electrical component E, components that require on-site construction, such as the functional components and the terminal board, are miscellaneously incorporated into the main body casing H, so even if there is sufficient work space, However, wiring work during installation and maintenance work during service are complicated, and a large work area is required inside the main casing H, resulting in an increase in the size of the main casing H.

Moreover, since the piping set S and the electrical component E are arranged in parallel, there is a problem that condensation of condensation on the refrigerant piping, etc., can cause frequent failures of the electrical component E. It is necessary to provide a partition structure W with high sealing performance between the set S and the electric component E, which also increases costs.

The present invention was devised in view of the conventional problems as described above, and is an improvement to the storage of refrigerant piping and electrical components in an external switching kit that relays connections between an outdoor unit and multiple indoor units. The purpose of this is to facilitate wiring work and service work during installation, even if the distance between the outdoor unit and the wall or screen of the building is narrow due to the installation circumstances, and to conduct wiring work and service work systematically and efficiently. ,
To provide a switching kit which can be carried out in an orderly manner, does not require a partition structure with high sealing performance, and can be made compact and inexpensive as a whole.

That is _, in the present invention, the compressor 41 and the outdoor heat exchanger ₄₃ are attached to the outer wall surface of the outdoor unit A, and the outdoor unit This is a switching kit for a multi-room separate air conditioner for relaying connections between a unit A and a plurality of indoor units B and C, and includes a main body casing 1 with the top and front sides open, and the casing 1 Side plate 1 facing the top surface and front open part
A contact portion 10 that bends inward is provided at the edge of the main body casing 1, and the upper plate 1a and the front plate 1b are detachably attached to the upper plate _1a.
In addition to incorporating the piping set 2 comprising a plurality of refrigerant piping 20 to 25 with ~SV ₄ , the flange 3a,
A functional parts set 5 in which electrical parts such as relays and timers are held in a box-shaped first holding body 3 having a diameter of 3b.
and a locally installed parts set 6 which holds electrical parts that require on-site installation such as a terminal board on the plate-shaped second holding body 4, and these sets 5 and 6 are connected to each other by the locally installed parts set 6. , the flanges 3a, 3b of the first holding body 3 and both ends of the second holding body 4 are overlapped so as to form an upper layer, and the side plate 1c is located above the piping set 2 in the main body casing 1. , 1d, between a pair of brackets 11, 12 provided inside the brackets 11, 1d, the first holding body 3 and the second holding body 3 are supported in a detachable manner.
A pair of missing parts 10a, 1 for inserting and removing the holding body 4
0b is formed.

Next, an embodiment of the switching kit of the present invention will be described based on the drawings.

The switching kit of the present invention is indicated by the symbol K in FIG.
As shown in FIG. 2, a compressor 41 and an outdoor heat exchanger 43 are installed on the outer wall of one outdoor unit A, and a plurality of indoor units B and C are installed.
The main body casing 1, which is open on the top and front, is connected to a piping system consisting of multiple refrigerant pipes and pressure equalizing pipes with solenoid valves, and electrical parts such as relays and timers, and electrical terminal boards, etc. An electrical system consisting of parts is built in, and the refrigerant piping is
A plurality of indoor units B and C are connected to the outdoor unit A via the switching kit K by connecting the outdoor side connecting pipe _R1 and the indoor side connecting pipe _R2 .

However, what is shown in Figures 1 to 5 is
Inwardly bent contact portions 10 are provided at the edges of the side plates 1c, 1d, bottom plate 1e, and back plate 1g facing the upper surface and front opening of the main body casing 1, and the upper plate 1a and the front plate 1b are The piping system such as the refrigerant piping and the pressure equalization pipe is assembled into the lower part of the main body casing 1 as a piping set 2, and is attached to a box-shaped first holder 3 having mounting flanges 3a and 3b. , a plate-shaped second holder 4, and the first holder 3 holds the electrical components having functions such as the relay and the timer to form the functional parts set 5, and the second holder 4 holds electrical parts that require on-site installation, such as the terminal board, to form on-site installation parts sets 6, and each of these sets 5 and 6 is then
As shown in the figure, the on-site construction parts set 6 is supported above the piping set 2 in the main body casing 1 so as to be freely attachable and detachable.

More specifically, each set 2, 5, and 6 shown in the drawing has two indoor units B and C as shown in FIGS. 6 and 7, and each set has two indoor units B and C as shown in FIG. This is applied to a refrigeration system that is controlled by electrical switching, and the piping set 2 is
As shown in FIG. 6, the liquid pipe 20 and the liquid pipe 2
Two liquid side branch pipes 21, 22 and a gas pipe 23 having electromagnetic valves SV ₁ and SV ₂ connected to
two gas-liquid branch pipes 24, 25 with solenoid valves SV ₃ , SV ₄ connected to the liquid-side branch pipes 21, 22;
It is composed of a pressure equalizing pipe 30 having check valves 26, 27 and capillary reach tubes 28, 29 in the middle which allow only the flow of refrigerant to the outdoor unit A. , each of the connecting fittings 31 to 37 is attached, and each of these connecting fittings 31 to 37 is attached.
37 is attached to the side plate 1c of the main body casing 1 in a protruding manner as shown in FIGS. 1 and 5.

Further, as shown in FIG. 7, the functional parts set 5 includes one electromagnetic switch MSB and a timer TB connected to the electric circuit of one indoor unit B.
It also includes one electromagnetic switch MSC, a timer TC, and two relays MR ₁ and MR ₂ connected to the electric circuit of another indoor unit C, and also includes the on-site construction parts set 6. As shown in FIG. 7, it consists of one terminal board 38 connected to the electric circuit of the outdoor unit A, and two terminal boards 39 and 40 connected to the electric circuits of the indoor units B and C. It is something.

Further, each of the parts sets 5 configured as described above,
6 on the main body casing 1, inverted L-shaped brackets 11, 12 are attached to the upper inner sides of the opposing side plates 1c, 1d of the main body casing 1, as shown in FIGS. 2 and 5. This is done by overlapping the mounting flanges 3a and 3b of the first holder 3 and both ends of the second holder 4 and installing them between the pair of brackets 11 and 12, and screws can be used as necessary. That's what I do.

Further, a pair of missing portions 10 are provided in the contact portion 10 located near each of the brackets 11 and 12 for inserting and removing the first and second holding bodies 3 and 4.
a, 10b are formed to ensure space when the respective sets 5, 6 are attached and detached in the front and back direction.

Note that the first and second holding bodies 3 and 4 have a second
As shown in FIGS. 4 to 4, cutouts 3c and 4a are provided through which electric wires are inserted, and the wires connected to the electrical components of each component set 5 and 6 are inserted downward through the cutouts 3c and 4a. The electric wire is guided to the bottom plate 1e of the main body casing 1 and is led out from the electric wire draw-out hole 1f provided in the bottom plate 1e of the main body casing 1. In addition, the terminal board 3
The connecting wires from the outdoor unit A and the indoor units B and C connected to the wires 8 to 40 are
The length of the path from f to each of the terminal boards 38 to 40 is longer than the length of the path, and the connecting wires between each of these terminal boards 38 to 40 and functional parts such as the electromagnetic switches MSB and MSC are also routed in accordance with the arrangement relationship. This makes it possible to perform wiring work with the on-site construction parts set 6 taken out from the main body casing 1, and also allows the wiring to remain connected when servicing functional parts. It can also be taken out.

Furthermore, in the above configuration, the switching kit K is attached to the suction side front plate a of the outdoor unit A as shown in FIG. The piping set 2 installed inside the main body casing 1 is installed in the lower part, and the component units 5 and 6 are installed in the upper part, so the width direction dimension is shorter than that of the conventional product shown in Fig. 10. Since it can be made vertically long, it can be attached to the side surface b of the thin outdoor unit A as shown in FIG. 8, or it can also be attached to the rear plate c on the outlet side as shown in FIG. In addition, in Figure 8, 1
Reference numeral 5 denotes a mounting base for opening the suction port provided on the side surface b, and the switching kit K is mounted to this mounting base 15 via the mounting brackets 13 and 14.

Furthermore, when installing the outdoor unit A and performing wiring work with the switching kit K attached to the outdoor unit A as described above, the work can be done from the top or front by removing the top plate 1a and front plate 1b. In addition, each of the parts sets 5 and 6 are removable, and the functional parts and locally installed parts are separated and arranged, so it is easy to install, not only for wiring work but also for servicing. This can be done extremely easily without being restricted by the installation direction of outdoor unit A.

Moreover, since the piping set 2 is placed below the component sets 5 and 6, the electrical components are not exposed to condensation water that occurs in the piping system, and the piping set 2 is provided with highly sealable partitions like the conventional products described above. This eliminates the need for a structure, which also reduces costs.

That is, in detail, in the case of a multi-room separate air conditioner in which a plurality of indoor units B and C are connected to an outdoor unit A, solenoid valves SV ₁ to SV necessary for relaying the connections are used. Refrigerant pipe 20 with ₄
-25, there are many electrical parts such as relays, timers, terminal boards, etc., and depending on their arrangement, the condensed water generated in the pipes 20 to 25 may have an adverse effect on the electrical parts, and the on-site work may be affected. In order to eliminate the negative effect of poor performance, the piping section is placed below the casing 1, and the electrical parts are placed above it.Furthermore, electrical parts that require on-site construction are separated from those that do not, so that they can be installed on-site. By locating the construction part at the top where it can be easily handled, it is possible to prevent condensed water generated around the piping from splashing on the electrical parts, and it has also been possible to improve workability on site.

In addition, a contact portion 10 that bends inward is provided on the upper and front surfaces of the casing 1 to which the top plate 1a and the front plate 1b are attached, to prevent water from entering from outside such as rainwater, and to reinforce the casing 1. In addition, the functional parts set 5 and on-site construction parts 6, which are divided into parts, are supported in series by a pair of brackets 11 and 12, and A pair of missing portions 10 are provided in the abutment portion 10 located at the contact portion 10 for inserting and removing the holding bodies 3 and 4 of each set 5 and 6.
a and 10b are provided to secure space when attaching and detaching each set 5 and 6 in the front and back direction, so it is easy to attach and detach each set 5 and 6 at the same time, and the sealing performance by the abutting portion 10 is improved. The inhibition of this could be kept to a minimum by only the pair of missing parts 10a and 10b.

The embodiment described above is as shown in FIGS. 6 and 7.
One outdoor unit A, two indoor units B,
However, the number of indoor units may be three or more.

In addition, in FIG. 6, 44 indicates the outdoor heat exchanger 4.
3 is an attached outdoor fan, 45 is a heating capillary reach tube, 46 is a check valve, 47 is a dryer,
48 is a capillary reach tube for cooling, 49 is a check valve, 50 is an indoor heat exchanger equipped with an indoor fan 51, and 52 is connected to a point in outdoor unit A that has low pressure during heating and high pressure during cooling. A pressure equalization communication pipe connects a first connecting pipe 54 having a service port 53 and a second connecting pipe 57 having a connecting port 55 and a check valve 56 in parallel.

Further, 58 is a liquid side closing valve, 59 is a gas side closing valve, and the liquid pipe 20 in the piping set 2 is connected to the connection port of the liquid side closing valve 58 by a connecting piping 60 via a connector 31. The gas pipe 23 in the piping set 2 is connected to the connection port of the gas-side shutoff valve 59 by a connecting pipe 61 via the connector 32, and the connecting port of the second connecting pipe 57 is connected to the connecting port of the second connecting pipe 57. 55, the pressure equalizing pipe 30 of the piping set 2 is connected to the connecting pipe 62 via the connector 37.

In addition, in FIG. 7, MC is a compressor motor,
SOL is the electromagnetic coil of the four-way switching valve 42, MFA is the outdoor fan motor, DS is the day icer, and MSA is the compressor motor MC and outdoor fan motor MFA.
The electromagnetic switch MRA is a relay for the coil of the four-way switching valve 42, and these electrical components are installed inside the outdoor unit A.

Also, _SB1 and _SC1 are operation switches, _SB2 and _SC2 are cooling/heating changeover switches, THB and THC are indoor thermostats, and MFB and MFC are indoor fan motors. These electrical parts are connected to the indoor units B and C.
Each is furnished with

Further, MSB-1 and MSC-1 are interlock contacts of the electromagnetic switches MSB and MSC provided in the functional component set 5, and are connected to the electric circuits of the indoor units B and C to which the electromagnetic switches MSB and MSC are connected. Interposed in another electrical circuit different from the corresponding electrical circuit,
When one indoor unit B or C is selected, the other indoor unit C or B cannot be operated.

Further, the timers TB and TC provided in the functional component set 5 are thermal timers, and the respective contacts TB-1 and TB- of these timers TB and TC are thermal timers.
2 is installed in an electric circuit different from the electric circuit corresponding to the electric circuit of each indoor unit B and C to which the timers TB and TC are connected, and
When the power supply to TB and TC is stopped, immediately after the power supply is stopped, the open state is maintained for a predetermined period of time (for example, 3 minutes), and after the operation of one indoor unit B or C is stopped, the operation of the other indoor unit C or B is When operation is to be carried out, operation is prohibited for a period of, for example, 3 minutes until the high and low pressures are balanced.

Further, MR ₁ -1 and MR ₂ -1 are normally open contacts of relays MR ₁ and MR ₂ provided in the functional component set 5, forming a delay circuit, and operating switches SB of the indoor units B and C. ₁ and SC ₁ are turned on at the same time, one indoor unit B is operated with priority.

As described above, the present invention is installed on the outer wall surface of the outdoor unit A that houses the compressor 41 and the outdoor heat exchanger 43, and connects the outdoor connecting pipe _R1 and the indoor connecting pipe.
This is a switching kit for a multi-room separate air conditioner for relaying connections between the outdoor unit A and a plurality of indoor units B and C via _R2 , and the top and front surfaces are open. The upper plate 1a and the front plate 1b are provided with a contact portion 10 bent inward at the edge of the side plates 1c and 1d facing the upper surface and the front opening of the casing 1, so that the upper plate 1a and the front plate 1b can be freely attached and detached. A plurality of refrigerant pipes 20 to 2 having electromagnetic valves SV ₁ to _{SV 4} are attached to the lower part of the main casing 1.
5, a functional parts set 5 in which electrical components such as relays and timers are held in a box-shaped first holder 3 having flanges 3a and 3b, and a plate-shaped second holder. 4 and a locally installed parts set 6 holding electrical parts that require on-site installation such as terminal boards, and each of these sets 5,
6, the local parts set 6 is attached to the flanges 3a, 3b of the first holding body 3 so as to be in the upper stage.
and both ends of the second holding body 4 are overlapped,
It is supported removably between a pair of brackets 11 and 12 provided on the upper side of the piping set 2 in the main body casing 1 and inside the side plates 1c and 1d, and is located near each of the brackets 11 and 12. The first holding body 3 is attached to the contact portion 10.
and a pair of missing parts 1 for inserting and removing the second holding body 4
0a and 10b, wiring work and service work can be carried out extremely easily and orderly regardless of the installation convenience of the outdoor unit A, and the above-mentioned piping Since the set 2 is placed at the bottom and the parts sets 5 and 6 are placed at the top, the main body casing 1 can be made vertically long and therefore compact, and when it is assembled to the outdoor unit A, it can also be installed on its side. In addition, condensed water generated in the piping set 2 will not come into contact with electrical components, and an expensive partition structure with high sealing performance can be eliminated, resulting in cost reduction. In particular, outdoor unit A
In the case of a multi-room separate air conditioner in which a plurality of indoor units B and C are connected to the refrigerant pipes 20 to 25 having solenoid valves SV ₁ to _{SV 4} necessary for relaying the connections, There are many electrical parts such as relays, timers, terminal boards, etc., and depending on their arrangement, the condensed water generated in the pipes 20 to 25 may have a negative effect on the electrical parts, and workability on site may be poor. In order to eliminate this problem, the piping section is placed below the casing 1 and the electrical parts are placed above it.Furthermore, the electrical parts that require on-site construction are separated from those that do not, and the on-site construction parts are arranged. By placing it in the upper part where it is easy to handle, it is possible to prevent condensed water generated around the piping from splashing on the electrical components, and it also improves workability on site, making it an extremely practical switching kit. We have now been able to provide the following.

In addition, a contact portion 10 that bends inward is provided on the top and front surfaces of the casing 1 to which the top plate 1a and the front plate 1b are attached, to prevent water from entering from outside such as rainwater, and to reinforce the casing 1. In addition, the functional parts set 5 and the on-site construction parts 6, which are divided into parts, are supported in series by a pair of brackets 11 and 12, and the parts are placed near the brackets 11 and 12. The first and second holding bodies 3, 4 are attached to the abutting portion 10 located at the contact portion 10.
A pair of missing parts 10a, 1 for putting in and taking out the
0b is provided to ensure a space for attaching and detaching each set 5 and 6 when attaching and detaching them in the front and back direction. Therefore, each set 5 and 6 can be easily attached and detached at the same time, and the sealing performance by the abutting portion 10 is improved. This is not achieved by supporting the two sets 5 and 6 on separate brackets and providing two pairs of missing parts corresponding to the positions of these two sets of brackets, but by treating only the pair of missing parts 10a and 10b. This could be kept to a minimum.

[Brief explanation of the drawing]

Fig. 1 is a perspective view showing one embodiment of the switching kit of the present invention, Fig. 2 is a perspective view with the top plate and front plate open, Fig. 3 is a perspective view of only the on-site construction parts set, and Fig. 4 is a perspective view showing an embodiment of the switching kit of the present invention. The figure is a perspective view of only the functional parts set.
The figure is a partially cutaway enlarged front view with the top plate and front plate open, Figure 6 is a refrigerant piping system diagram showing an example of an air conditioner to which the switching kit of the present invention is applied, and Figure 7 is also an electrical The circuit diagram, FIGS. 8 and 9 are schematic plan views showing an example of attachment to an outdoor unit, and FIG. 10 is a perspective view showing a conventional example. 1... Main body casing, 2... Piping set, 3
...First holding body, 4...Second holding body, 3a, 3b
...Flange, 5...Functional parts set, 6...On-site construction parts set, A...Outdoor unit, B, C
...Indoor unit, SV ₁ to _{SV 4} ...Solenoid valve, 20
~25...Refrigerant piping, 1c, 1d...Side plate, 41
... Compressor, 43 ... Outdoor heat exchanger, R ₁ ...
Outdoor connection piping, R ₂ ... Indoor connection piping, 10
...Abutting part, 10a, 10b...Missing part, 11,
12...Bracket.

Claims (1)

[Scope of utility model registration request] The compressor 41 and the outdoor heat exchanger 43 are installed on the outer wall of the outdoor unit A, and are connected to the outdoor unit A and a plurality of indoor units via an outdoor connecting pipe _R1 and an indoor connecting pipe _R2 . This is a switching kit for a multi-room separate air conditioner for relaying connections between units B and C, and includes a main body casing 1 with an open top and front surface. Abutment portions 10 bent inward are provided at the edges of the side plates 1c and 1d facing the upper plate 1.
A and front plate 1b are freely attached and detached, and piping set 2 is provided with a plurality of refrigerant pipes 20 to 25 having electromagnetic valves SV ₁ to _{SV 4} at the lower part of the main casing 1.
In addition, a functional parts set 5 which holds electrical parts such as relays and timers in a box-shaped first holder 3 having flanges 3a and 3b, and a plate-shaped second
A locally installed parts set 6 holding electrical parts that require on-site installation such as a terminal board is formed on the holder 4, and these sets 5 and 6 are arranged in the above-mentioned manner so that the locally installed parts set 6 is on the upper stage. A pair of flanges 3a, 3b of the first holder 3 and both ends of the second holder 4 are overlapped, and are provided above the piping set 2 in the main body casing 1 and inside the side plates 1c, 1d. bracket 1
1 and 12, a pair of missing parts 10a for freely attaching and detaching support, and for inserting and removing the first holder 3 and the second holder 4 into and out of the contact part 10 located near each of the brackets 11 and 12; , 10b for a multi-room separate air conditioner.