JPS59180253A - Multi-chamber type air conditioner - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed description of the invention]

The present invention relates to a multi-chamber air conditioner, specifically a 4-unit air conditioner) R
- Regarding multi-room air conditioners that connect multiple indoor units and perform multi-current air conditioning, multi-room air conditioners generally use a heating/cooling switching mechanism such as a four-way switching valve. It is designed to perform air conditioning and heating in multiple rooms, but if either cooling or heating is selected according to D-11 Kiriki 4 Quad q, all indoor units will perform cooling or heating operation, and multiple There was a problem in which the indoor units could not be freely cooled or heated in response to the indoor load installed on these indoor units. 55 12
No. 372, and as shown in Figure 1, in a multi-room air conditioner, the pipe (0) through which high-pressure gas flows during cooling operation is connected to the number of indoor units (B)... Connect multiple corresponding branch pipes (D)... and connect these branch pipes +D)... to the gas side main pipe (E) to open/close the gas side branch pipe (F)... valve (v1). ]... and each gas side branch pipe (F)... and the indoor heat exchanger (G)... of each indoor unit 7) (B)... connected to each of these branch pipes (F).・Connect each branch pipe (F)・
- By installing a Yuko on-off valve (V2)..., even when one indoor unit (B)... is in cooling operation, the remaining indoor unit CB)... We proposed a system that enables heating operation for one or more units. In Figure 5, (A) is the outdoor unit, (H) is the compressor installed in (A), (J) is the straw outside heat exchanger, and (K) is the liquid receiver. be. However, according to this multi-room air conditioner, even when one room is being cooled, another room can be heated (but each indoor unit is heated). An indoor heat exchanger (()) is provided, and these heat exchangers 4(1) are used as an evaporator and a condenser,
Since it is a choice between air conditioning and e-air conditioning,
@Humidity) In most cases, negative indoor air conditioning (fine air conditioning corresponding to A5 i) cannot be performed, and in response to the indoor load, the indoor heat exchanger CG) can be used as an evaporator. dt44, so the next problem is also...
q. That is, firstly, when the indoor heat exchanger (G), which was used as a condenser for heating, is switched to an evaporator for cooling depending on the indoor temperature, the temperature-sensitive node of the expansion valve is the discharge gas. Due to the heat capacity of the heating device (G) itself, etc.), the followability of the expansion valve is poor, resulting in wet or dry operation. Similarly, if the indoor heat exchanger (G), which was used as an evaporator for cooling, is switched to a condenser for heating, due to the heat capacity of the heat exchanger itself, the heat exchanger (G) Liquid refrigerant accumulates in the heat exchanger CG), and as a result, it is not possible to achieve sufficient capacity immediately after switching, resulting in poor response to the load.Moreover, due to the liquid refrigerant accumulating in the heat exchanger CG), This is due to the lack of refrigerant in the other indoor units (CB) and the problem of insufficient capacity.
This makes it difficult to frequently switch between heating and cooling the indoor unit. Secondly, switching between air conditioning and heating as described above is mainly done during the interim period, and the cooling and heating loads during the middle 18th construction period are extremely high compared to the peak loads in the summer and winter. small. However, the indoor heat exchanger D (G) is selected to have a large capacity according to the peak load, and the heat exchanger CG with such a large capacity
) is used as an evaporator or condenser to perform air conditioning and heating, so the capacity becomes excessive and the continuous operation of indoor units (CB)... frequently stops, resulting in large variations in indoor temperature. occurs. The present invention was developed in view of the above-mentioned problems, and its purpose is to provide an indoor unit with an auxiliary heat exchanger together with an indoor heat exchanger so that each indoor unit can operate independently of the operation of other indoor units. It is possible to select between J air conditioning, cooling 1 support air conditioning during the intermediate period, dehumidification, and heating operation, and in addition, appropriate air conditioning and heating can be performed in the intermediate period according to each load, and the overall air quality is finely tuned. The point is to make it possible. In addition, the configuration of the present invention includes a compressor, 4 external heat exchangers, and a plurality of 4 external units (1) with an indoor heat exchanger (1) connected multi-chamber air In accordance with the harmonization machine number, several main pipes of the recording unit are provided with several branch pipes, and. A plurality of gas side first branches are installed in the first gas side main pipe, which becomes low pressure during cooling and high pressure during heating, and a plurality of power branches are connected to the second gas side main pipe, which becomes low pressure during heating and high pressure during cooling. In addition to providing a second branch pipe on each side, each indoor unit described in
An auxiliary heat exchanger is provided, and each of the DTJ heat exchangers in each of these indoor units is connected in parallel to the several branch pipes, while the indoor heat exchanger gas side 1 branch pipe, and also the auxiliary heat exchanger t4i
Connect to J gas side da S2 branch pipe respectively, tj! By installing an on-off valve that can prevent the flow of refrigerant for each heat exchanger listed in J, each indoor unit listed in J is controlled according to the indoor load regardless of the operating conditions of other indoor units. Next, one embodiment of the present invention will be described with reference to FIG. 1, which enables proper and detailed air conditioning operation. The number 1N shown is one outdoor unit (A)
4 indoor units) (B)..., which is a successor to the above outdoor unit) [A] is a compression unit (1), an outdoor heat exchanger [2], and a liquid receiver (6). and accumulator (
4] and a heating/cooling switching mechanism (5) mainly consisting of a four-way switching valve.
] and 2, and are connected by refrigerant piping (6).Then, the outdoor heat exchanger (2) and the liquid receiver (6)
A heating expansion valve (7) and a check valve (8) (7) 4p row circuit are interposed in the liquid pipe (61) connecting the refrigerant pipe (6). 62) has four branch pipes (6) corresponding to the number of indoor units) (B)...
6]... and IJ11 refrigerant piping (6)
The cass j1111 has low pressure during cooling and high pressure during heating.
The first main '1f (64) has an on-off valve (9)..., M
Four gas-side first branch pipes (65) corresponding to the fault of the TJ indoor unit (B)...In addition, the gas-side second main pipe (66) has low pressure during heating and high pressure during cooling. i-ko,
It has an on-off valve (10)... and an i7U internal unit (
E) 4 gas side second pillars (6
7)... are provided respectively. On the other hand, the above-mentioned indoor units) CD)...
A device 1ii7L includes an indoor heat exchanger (11), an expansion valve for cooling (12), and a check valve (16) interposed in a bypass circuit that connects the expansion valve (12) to a bypass circuit during heating. Each connection is made by a refrigerant pipe (14), and an auxiliary heat exchanger (
15) are installed to connect the in-mold +ti, lI heat exchanger (11) and the auxiliary heat exchanger (15) to the connecting pipe (2).
0) in parallel to several branch pipes (66) in the outdoor unit (A), and the gas 11II of the rFI-recorded indoor heat exchanger 1) is connected to the first branch pipe on the gas side, respectively. (65) ..., the gas side of the auxiliary heat exchanger 5 (15) described in MjI is connected to the second branch pipe (67) on the gas side.
]... through connecting pipes (21) and (22), respectively. hjJ auxiliary heat exchanger (15)... is li'7J gas side first branch (65)... and gas side second branch pipe (6
7] This is used as an evaporator or a condenser by opening and closing the on-off valves (9), (10)... For example, it is set to 20 to 40%, preferably 60% of the indoor heat exchanger (11). Also, the auxiliary heat exchanger (15)... Some of them include an expansion valve (16) that acts when the auxiliary heat exchanger (15) is used as an evaporator, and a reverse valve that is installed in a bypass passage that bypasses the expansion valve (16) when it is used as a condenser. Stop valve (17
]. In Fig. 1, [18] is an outdoor fan, and (19) is an indoor fan.In addition, in the above embodiment, each on-off valve (9), (10) is connected to each gas side first branch pipe ( lls
5) and the second support (67), but without being limited to these support bones (65) and (67), each heat exchanger (11>, (15) ) per′?
? Of course, it is sufficient to attach it to K to the extent that it can prevent the circulation of medium J. Next, an electric circuit for controlling the opening and closing of the on-off valves (9) and (10) in the air conditioner ζ constructed as above will be explained with reference to FIG. The opening/closing valves (9) and (101) mainly use RL (isofune) and operate by detecting the indoor temperature.
Using an OB device (60) and a humidity detector (61) that detects indoor humidity and generates a
(10) This is done as if controlling the F opening/closing. That is, the temperature detector (60) has a first switch (30a) which has different set temperatures, and which operates to close when the indoor load requires cooling, and a second switch (30a) which closes when the indoor load requires heating. These switches (6Qa) and (3Qb) 7i are connected in series with the relays (T+) and (Tz), respectively, to the power supply line, and the above are connected to the employment rate detector (61).・Switch that closes under humidity conditions that require dehumidification (3)
1 &) Tt, D'J relay (Tt), (T
The normally closed contact (TIb) of z) and the series circuit of ('Db) are connected in series with the relay (Tx).Then, the N iJ power line is connected to the outdoor unit (B) electricity. Connecting a contact (S) and a relay (R1) that are interposed in the circuit and closed by the operation of a relay (not shown) that operates in response to a switching operation of the heating/cooling switching mechanism (5) to the IR column, The on-off valve (9) no solenoid (SVI),
Normally open contact (RIIIL) of IJ Ray (Rs)
and a normally open contact (Tza) of the relay (Tz), a series circuit of a normally closed contact (Rsb) of the relay (R1) described in giJ, and a normally open contact (Tla) of the relay (TI), and The normally open contact (Tsa) of the relay (T3) is connected in series with a parallel circuit that is connected in parallel, and the solenoid (SV2) of the on-off valve (10) is connected to the normally open contact (Tsa) of the relay (R).
A series circuit of the normally open contact (R+a) of 1) and the normally open contact (TIaJ) of the relay (TI), and the normally open contact (Rxb) of the relay (R1) and the normally open contact (Tz) of the relay (Tz). Tsa) is connected in series to a parallel circuit in which the normally open contacts (TB & ) of the relay (T8) are connected in parallel. each indoor unit)
(B)... and is connected to the electric circuit of the outdoor unit (A). 711 Each guide unit (B')... (Pair 1) Each indoor unit) (E)... is operated by opening/closing control of the OjJ on-off valves (9) and (10) provided in 6 sets. This can be done in detail according to the indoor load. Next, the operation pattern of the all-air conditioner configured as above will be explained. First, the heating/cooling switch +: 13Hf+j (5') is set to the first
By switching to cooling mode as shown by the solid line in the figure, cooling-based operation can be performed. Cooling-based operation is selected when the total cooling load for each room is greater than the total heating load for the remaining rooms. The operation pattern in this cooling-based operation is as follows. (1) Cooling operation This pattern is used when there is only a cooling load in each room, and the on-off valve (10) is closed and the on-off valve (9) is closed.
Then, normal cooling cycle-C operation is performed using the indoor heat exchanger described in J as an evaporator. (2) Dehumidifying operation In this pattern, the indoor heat exchanger (1') is used as an evaporator to perform cooling, and the corresponding indoor unit)
Both the on-off valves (, 9) and (10) of (E) are opened, and the discharge gas is transferred to the auxiliary heat exchanger f, + (15). Let it flow,
This is done by reheating the cooled air using the heat of condensation. This dehumidification operation is performed only in the indoor unit (B) installed in the room that requires dehumidification, and can be performed even when other indoor units (B) are performing cooling operation. As is clear from the electric circuit shown in the figure, the humidity detector (61) is activated and the relay [T8]
This can be done automatically by being excited. In addition, in the dehumidification M rotation, the auxiliary heat exchanger (15
] The liquid refrigerant condensed in MiJ passes through the reverse check valve 7)t' and is transferred to the cooling expansion valve (12) into the indoor heat exchanger (11).
) and used for air cooling. (3) This heating M-turn pattern in the intermediate period is performed by flowing the discharge gas through the auxiliary heat exchanger (15) without using the indoor heat exchanger (11).
Applicable indoor unit) mJ on-off valve 10) of CB]
This can be done by opening '2 and closing the on-off valve (9). This heating operation is performed only in the indoor unit installed in the room that requires heating.In other rooms with a cooling load, cooling operation is performed, and in other rooms with a dehumidifying load, dehumidification is performed. Even if the indoor load changes from cooling load to heating load, cooling is carried out by the heat exchanger inside the silkworm.

[11], and heating is performed using an auxiliary heat exchanger (1
5), in other words, one heat exchanger is not switched from cooling to heating or vice versa, so there is no problem with cooling control in the conventional equipment described in iFI. In operation, since the capacity of the auxiliary information exchanger (15) is set to the capacity required for the intermediate period, it can be operated at a capacity that matches the small load during the intermediate period, and the frequency of operation stoppages can be reduced accordingly. , Therefore, the variation in room temperature can also be reduced. Also, the heating operation is performed when the second temperature sensor [60]
This can be done automatically by energizing the relay ['1ax] by operating the switch (3Qb). In addition, in this heating operation, the liquid refrigerant that has undergone W Ha in the auxiliary heat exchanger (15) passes through the check valve (17)',
It is supplied to the indoor heat exchanger (11) of the indoor unit (B) which is performing cooling operation via the connecting pipe (20). Next, the operating conditions in heating-based operation are explained as follows. Note that heating-based operation is selected when the total heating load of each room is greater than the total cooling load of the remaining rooms. '1 No. Heating operation This pattern is used when there is only a heating load for each ≧≦, and the on-off valve (10) is closed and the on-off valve (10) is closed.
9) Open 1) 1 (recording room + ttll heat exchange 1 smile (11
) is used as a condenser and is operated in a normal heating cycle. (2) Dehumidification operation In this pattern, if the indoor heat exchanger (11) described in item 1 is used as a condenser to heat the air, the corresponding M
i Open and close the on-off valves (9) and +10) by 1 υ1j,
This is done by supplying the liquid refrigerant through the expansion valve (16) and cooling the air with its latent heat of vaporization (not applicable to other indoor units). In (B), heating operation can be performed. This pattern is similar to the dehumidifying operation in the cooling-dominant operation (dehumidifying operation in contrast to the cooling-dominant operation), but depending on the condition of the auxiliary heat exchanger (15) described in [j11], the cooling-dominant operation (in contrast to the dehumidifying operation in , This dehumidifying operation in the < turn has a heating effect. Also, this dehumidifying operation can only be performed in the indoor unit (B) installed in a room that requires dehumidification, and the humidity detector (61) This can be done automatically from the excitation number of the relay (T3) by operation.
The gas refrigerant evaporated is returned to the first suction port of the compressor (1) via the communication pipe (22), the second gas side branch pipe [67], and the low pressure gas side main pipe (66). ( B Cooling operation during the intermediate period This pattern does not use the indoor heat exchanger (11).
This is done by flowing liquid refrigerant through auxiliary heat exchange a (15).
Nil period on-off valve 0) of the applicable indoor unit (B)
Open the on-off valve

This can be done by performing l1I4 on [9]. In addition, this operation is performed only in the indoor unit (B) installed with an indoor air conditioner that requires air conditioning.
In other rooms with heating load, cooling is performed, and in this pattern of cooling operation with negative heating, an auxiliary heat exchanger is used, as in the heating operation in the intermediate period of the above-mentioned cooling-main operation, and the main operation is changed. (Therefore, the indoor unit installed in a room that requires air conditioning)
(E) alone, and even if, for example, there is no sunlight and the indoor load changes from cooling load to heating load, heating is performed by ν≦inner heat exchanger (11), so refrigerant control is required. There is no problem with the above, and cooling operation can be performed with a capacity that matches the small load in the intermediate period.
The relay (Tl) is excited by the operation of the switch (3Q a) (this allows automatic tune numbering), and the gas refrigerant evaporated in the auxiliary heat exchanger (15) during this cooling operation is used in the dehumidifying operation. Similarly, it is returned to the suction port of the compressor (1).
However, the cooling operation pattern and heating operation pattern have been suspended.
By configuring as shown in FIG. 6, cooling or heating capacity can be increased by utilizing the auxiliary heat exchanger (15)'E-. That is, what is shown in FIG. 6 is the refrigerant piping system number shown in FIG. To write, ■ iJ for the on-off valves (9), (10) of each branch pipe (65), (67), the gas O1!l first and second main pipe (64), C66
), each branch pipe (65) of the same system, on the side opposite to the connection side to (
67) A communication pipe (68) with an on-off valve (60) between
... are interposed respectively. In such a configuration, by closing the on-off valve (10) and opening the on-off valves (9) and (30), the auxiliary heat exchanger (15) can be used for evaporation, similar to the indoor heat exchanger (11). As vessels or condensers, these exchangers (11), (15
) can perform cooling or heating at the same time, increasing capacity accordingly. The idea behind this example is that during cooling when the outside temperature is high,
Alternatively, when the outside air temperature is low (at 1νω), the auxiliary heat exchanger (15) is rarely used because there is generally no coexistence of heating and cooling loads and there is less need for dehumidification than in the intermediate period. Focusing on the fact that it is somehow idle,
This is done to make more effective use of the idle auxiliary heat exchanger (15), and if the capacity of the indoor heat exchanger (11) is selected according to the heating and cooling load at peak times, the indoor Increase in capacity in unit) CB) The start-up operation time can be shortened, smooth start-up operation can be performed, and the capacity can be increased, so the total of each heat exchanger (11) and (15) can be reduced. ability? Since it can be selected according to the heating and cooling load at the peak time, the amount of the indoor heat exchanger (11) can be reduced accordingly. In addition, the opening/closing control of the on-off valve (30) in the case of the above configuration is performed by connecting a control switch (SS) and a relay (Rt) in series to the electric circuit shown in FIG. 4, as shown in FIG. Circuit P is added, and the solenoid (S Vs) of the on-off valve (60) is added.
), the normally open contact (R2a) of the relay (R2),
The next parallel circuit, namely the relay (R+), ('f+
), a series circuit of each normally open contact (Rla) + (Tt a ), a normally closed contact (R+b) of the relay (R1), and a series circuit of the relay (T2)'s open contact (Tta) and - and a parallel circuit connected in parallel with I. It connects to. The control switch (SS) is mainly a manual type, but it may also be operated by an outside temperature sensor provided, or an indoor temperature sensor 1 may be provided and this sensor It may also be configured such that it is operated by. In this case, the room? 'l! As the degree detector, it is preferable to use a two-stage thermostat that sets the temperature corresponding to cooling/heating. Regarding IN 31XJ and Figure 4, are the parts with the same configuration as the embodiment shown in Figures 1 and 2 the same reference numerals? I have filled it out. As described above, the present invention includes a compressor (1), an outdoor heat exchanger (
2) and an outdoor unit equipped with a heating/cooling switching mechanism (5))
(A) A mantissa indoor unit equipped with an indoor heat exchanger (11) CB)... In a multi-room air conditioner connected to the indoor unit (A), several main % F of the outdoor unit (A)
(62) + several branch pipes (66)... are provided,
In addition, the pressure is low during cooling and the pressure is regulated during heating.
The first branch pipe on the gas side of the coal number [65] is connected to the main pipe (64), and the second branch pipe on the gas side of the mantissa is connected to the second main pipe on the gas side, which becomes low pressure during heating and low pressure during cooling (66). (67)...
・In addition to providing each of the above indoor units) (B
)...(Auxiliary heat exchangers (15)... are provided in each of these indoor units) CB)... Each of the heat exchangers (11) in... (15) are connected in parallel to the several branch pipes (66)..., while iiJ indoor heat exchanger PAs (11) are connected to the first gas side branch pipe (65)... , the auxiliary heat exchanger (15) is connected to the gas 1AIli second branch pipe (67).
... and each heat exchanger marked 'A'J (11
An on-off valve (9) that can block the flow of refrigerant every 1° (15)
), (103 are attached respectively, so each indoor unit CB)...- is connected to other indoor units)
(B) Cooling or heating and dehumidifying operation are possible regardless of the four conditions of...14J. Of course, IUI can perform cooling or heating operation on all indoor units) (B)..., for example, even if one indoor unit) CB) is performing cooling or heating operation, the remaining In (B), it is possible to carry out air conditioning or air conditioning, and also to dehumidify the air. Also, heating during cooling-based operation and cooling during heating-based operation are performed using an auxiliary heat exchanger (15 cm), so it is possible to switch from cooling to heating or from heating to cooling depending on changes in the indoor load. In the case, rM storage chamber III!l heat exchanger (1
1) There is no need to switch between the F evaporator and the condenser,
Therefore, there is no inconvenience such as wet or dry operation, there is no problem of liquid refrigerant accumulating in the indoor heat exchanger (11), and it is possible to switch between heating and cooling modes. This becomes the f finger. Furthermore, the capacity of the RiJ auxiliary heat exchanger (15) 4'i can be selected to correspond to the load required during the intermediate period, so that heating or cooling performed using the auxiliary heat exchanger (15) during the intermediate period can be , it is possible to operate at a capacity that matches the load, and it is possible to reduce variations in indoor temperature caused by operation at an excessive capacity for the load during the intermediate period. As mentioned above (not only the selection of air conditioning and heating, but also
It is possible to perform heating and cooling according to the indoor load during the intermediate period, and since the dehumidification operation is also possible, detailed air conditioning operation can be performed.

[Brief explanation of the drawing]

Fig. 1 is a refrigerant piping system diagram showing one embodiment of the present invention;
6 is a refrigerant piping system diagram showing another embodiment, FIG. 4 is an electric circuit diagram thereof, and FIG. 5 is a refrigerant piping system diagram showing a conventional example. (1) Compressor (2) Outdoor heat exchanger (5) Air conditioning/heating switching mechanism (9), (10) Open/close valve (11) Indoor heat exchanger Heat exchanger (15)...Auxiliary heat exchanger (62)...Part side main pipe (66)...Liquid side 1st branch pipe (64)...Gas side first main pipe (65)...Gas Side first branch pipe (66)...Gas side second main pipe (67)...Gas side second branch pipe (A)...￥External unit CB)...Indoor unit Fig. 2 Fig. 3

Claims (1)

[Claims] (1) Outdoor unit with +E compressor (1), outdoor heat exchanger (2), and air conditioning/heating switch gA61 (5)
(A) 1, the mantissa of the indoor heat exchanger (11)
In a multi-room air conditioner connected to 4 indoor units) (E)..., several main pipes (62
) is provided with a plurality of branch pipes (66)..., and the gas side first main '# (64) has low pressure during cooling and high pressure during heating.
) to the gas side first branch pipe (65) of (-M@), and the gas side second main pipe C6, which has low pressure during heating and high pressure during cooling.
6) In addition to providing a plurality of gas side second branch pipes (67)..., +iJ each indoor unit 7) (E)...
, an auxiliary heat exchanger (15)... is provided respectively, and each of the heat exchangers (11), (15) in each of these indoor units (CB)... is connected to the several branch pipes (66)...・
・While connected in parallel to
1) to the first branch pipe (65) on the gas side described in 1ITS, and the second branch pipe on the gas side (67) described in jjjl, respectively, Each of the heat exchangers 1) and ('15) is equipped with an on-off valve (9) and (10) that can block the flow of refrigerant f: Features of multi-room air conditioner