JPS6358050A - Multi-chamber type air conditioner - Google Patents

Abstract

PURPOSE:To provide a multi-chamber type air conditioner requiring no capacity selection switches by a method wherein data on a capacity of an indoor unit is inputted into operation command to be transmitted from each of indoor units to an outdoor unit. CONSTITUTION:Each of indoor micro computers 5a and 5b may determine a request inverter output frequency F in response to a temperature difference between a sucked air temperature TA and a room temperature set temperature TS and then output the required inverter output frequency F and each data on a capacity C of an indoor unit set when manufactured in the indoor micro computers 5a and 5b in advance, as an operation command to a multi controlling micro computer 13. The micro computer 13 reads both required inverter output frequency F and the capacity C of the indoor unit in response to an operating command from each of the indoor units 1a and 1b, corrects the required inverter output frequency F from each of the indoor units 1a and 1b in response to a ratio of the capacity C of the indoor unit to the capacity c0 of an outdoor unit 3 and outputs a total frequency FT together with a cooling and heating data to the outdoor micro computer 22 as a final required inverter output frequency.

Description

[Detailed Description of the Invention] [Objective of the Invention] (Industrial Application Field) The present invention connects a plurality of indoor units each having a different capacity and perspiration to an outdoor unit equipped with a compressor capable of capacity control operation. This invention relates to an improvement in a means for recognizing the capacity of each campus unit +- in a multi-room air conditioner I in which indoor units can be freely selected and operated within a fixed range of 8 units.

(Prior Art) In this type of multi-room air conditioner, the same indoor microcomputer is usually installed in every indoor unit regardless of its capacity. Therefore, as it is, even though the capacity of each indoor unit is different, the outdoor unit that receives the operation command from each indoor unit will not be able to distinguish between the capacities of the indoor units. It is not possible to perform refrigerant circulation system 0++ at each indoor unit corner.

For this reason, conventionally, the indoor micro combi coater 10 of each Unai unit l-101, 101b as shown in FIG.
5. 105b are the same, each indoor unit 101 . 101. The capacity of σ
Capacity a selection switch 130 for recording. 130b is provided, and by setting this according to the indoor unit l- connected by the contractor during installation work, the capacity of the indoor unit can be recognized. In the figure, reference numeral 122 denotes an outdoor microcombicoater which receives operation commands from a multicontroller microcomputer 13 and controls the compressor capacity.

(Problems that will be solved by the invention) However, in the conventional method described above, the setting of the capacity selection switch is done by humans during installation work, so setting errors are likely to occur, and - La Bruya)
There is a problem that causes complaints such as not cooling (when cooling) or not warming (when heating).

An object of the present invention is to provide a multi-room air conditioner that does not require an installation contractor to input the capacity of a connected indoor unit to an outdoor unit, that is, does not require a capacity/weight selection switch.

(Structure of the Invention) (Means for Solving the Problems) The present invention incorporates information on the capacity of the indoor unit into the operation command sent from each indoor unit 1 to the outdoor unit. be.

(Function) Each indoor unit sends an operation command representing information such as the cooling/heating operation mode, on/off of the compressor, or the operating frequency to the outdoor unit, and the outdoor unit controls the compressor capacity and refrigerant according to this operation command. Circulation control, etc. is performed, but if information on the capacity of each indoor unit is included in this operation command, the outdoor unit can read the information from the operation command, so there is no need for a capacity selection switch. becomes.

(Example) The present invention will be explained below using fruit examples.

FIG. 2 shows a refrigerant piping system according to an embodiment of the present invention.

As shown in the figure, in this embodiment, a plurality of indoor units 1. 1b, one outdoor unit 3
, and a branch unit 2 connecting each indoor unit 13.1b and the outdoor unit 3. Each indoor unit 1.1 has a heat exchanger 4
．． 45, ab
The required inverter output frequency is determined according to the difference between the detected suction air temperature TA and the room temperature set temperature T3, and the required inverter output frequency is determined as shown in Fig. 1. It consists of an indoor microcomputer 5.5b that outputs operation commands consisting of serial signals. The branch unit 2 is connected to each indoor unit 1.1.
Liquid side skin tube of b 6.6. A cooling expansion valve 78°7, a check valve 8. 8. , m-dynamic flow control valve 9.

b a
a9, each gas side skin @10.10b
b a provided in
Gas side solenoid valve 11. 11. , and each indoor microcomputer 5.5b, corrects and totals each required inverter output frequency, outputs an operation command to the outdoor unit 3 based on this total frequency, and controls the opening degrees of the various valves. The microcomputer 13 is comprised of a mile control microcomputer 13 and the like. Also,
The outdoor unit 3 includes a liquid tank 14, a heating expansion valve 15, a check valve 16, an outdoor heat exchanger 17, a four-way valve 18 for switching between air conditioning and heating, an accumulator 19, and a conbrella I2.
0, an inverter 21 for controlling the rotational speed of the compressor ++ 20, and an operation command from the multi-control microcomputer-3; Outdoor micro combination 1-22
It is composed of etc.

Figure 3 shows the flow of information between each computer.

As mentioned above, each indoor microcomputer 5a, 5b
determines the required impeller output frequency F in accordance with the relationship shown in FIG. The command is output to the multi-control microcomputer 3. Here, FIG. 4 shows -".

The curve shown by shows the chronological change of the suction air temperature TA, and in which zone is this suction air temperature T present among zones a to g, which are divided into stages of the temperature difference T8-TA with respect to the room temperature setting temperature T3? This shows that the required inverter output frequency F corresponding to each zone is determined depending on this.

In addition, considering the case where the capacity of the indoor unit is insufficient for the heat load of the room in which it is installed, the humidity difference T3-T^ continues to exist in the same zone for a predetermined period of time or more. In this case, increase the required inverter output frequency F by a certain value when the zone is a, b, c, or d, and decrease it by a certain value at the end of the f zone to avoid a shortage of capacity jd. You can also do J to make up for it.

Once the required impark output frequency &F is determined in this way,
The required inverter output frequency F, the type of air conditioning and heating, and the information on the indoor unit 8C set in advance in the indoor microcomputer 5.5b at the time of manufacture at the factory are as shown in Figure 1(a). For example, 11 per set data
It is formed into a serial signal g of bits (electron J≦; waveform 11 → noise signal) and output to the multi-control microcomputer 13 as an operation command. This serial 1Δ
The information assigned to each bit of the code is, for example, as shown in Figure 1(b), the Oth bit is the start bit and is always "
]-], the first bit is the heating/cooling signal bit, f'LJ for cooling, r I-I J for heating, the second to fifth bits.
Pit I is the required impark output frequency F2 from 0 [H] to 90 [H7], 5N (1) medium poly pit, and the 6th to 8th pits are the indoor unit 6 hanging C from 2 [IP] to 6 Bits shown in units of 0.5 [+-IP] up to [+-IP], the 9th and 10th bits are stop bits, and are always <r as r l-I J.

The multi-control microcontroller 13 receives the required inverter output frequency F and the indoor unit capacity 11? from the operation commands from the indoor units ia and 1b. l
ic is read, and first, the required inverter output frequency F from each indoor unit 1.1b is corrected according to the ratio of the capacity fMc of the indoor units 1 to MC8 and the capacity MC8 of the outdoor unit 3 as shown in the following equation.

Here, F* is the corrected inverter output frequency. That is, the capacity C of the indoor unit 1a is C0, the requested impark output frequency F is 8, and the inverter output frequency after adjustment is F*a.

8 The capacity C of the indoor unit 1b is expressed as Cb, the required inverter output frequency F is expressed as Fl, and the same modified impark output frequency 1 is expressed as Fl5. For example, Co=5[11P] C,=21HP Co,C,=3 [1-IP] If J is corrected to . Next, each indoor unit 1 obtained in this way
．． 1b corrected inverter output frequency F*, ,
F*, is calculated by Kawaguchi as shown in the following equation to obtain a total of four frequencies FT.

F[=F"8+F"b This total frequency Fr is set as the final required inverter output frequency and is output to the outdoor microcombustion control unit 22 along with the heating and cooling information.

The multi-control microphone [] computer 13 also controls the electric flow rate adjustment valve 9.b corresponding to each a'b indoor unit 1.1b based on the post-uplift inverter output frequency F*F* of each indoor unit h1.1b. 9
The opening degree of b is changed according to the relationship shown in FIG. In this case, for the indoor unit whose operation is stopped, the corresponding electric flow; a 'JJ! J adjustment valve 9.

close. In addition, while listening to the gas side solenoid valve 11 corresponding to the indoor unit that is in operation, the required inverter output frequency F of O[H7] is
Gas side power 1i corresponding to the indoor unit receiving the command
Close valve 11.

The outdoor microcomputer 22 is a multi-computer 1-[1
- RUN EQ D] Receives the air conditioning/heating frequency and the total frequency F1 transmitted from the computer 13, sets the direction of the four-way valve 18, and limits the output frequency of the inverter 21 to the total frequency F1.

Next, we will explain the effect of this embodiment as an indoor unit with a capacity of 2.
[HP], 3 [+-IP] are connected to create a cold V)
Let me explain using an example of driving.

As mentioned above, the capacity of the outdoor unit 3 C3 = 5 [+-IP] The capacity of the indoor unit 1a in the eighth room ff1ca = 2 [+-IP same required inverter output frequency F = 60 [+17] In the room B Capacity Cb of unit 1b = 3 [HP] Same required inverter output frequency Fb = 80 [+-1,] When each indoor unit 1.1bg)fi positive inverter output frequency F*, , F*b is, Therefore, the total frequency F1 is F = F"+ji, = 72[+-1□]T
It is calculated as a. Therefore, the required inverter output frequency issued from the multi-control microcomputer 3 to the outdoor microcomputer 22 is 72[+-
1], and an electric flow rate adjustment valve 9a corresponding to each indoor unit 1.1b.

The opening degrees of 91 and 91 are 33% and 33%, respectively, according to the relationship shown in Figure 5.
It becomes 56%. By doing so, the compressor 20 in the outdoor unit 3 is connected to each indoor unit 1.1. It is possible to exhibit an appropriate capacity commensurate with the total heat load of the refrigeration cycle, and to maintain the refrigeration cycle in an appropriate state.

Further, each indoor unit 1.1b can perform appropriate tr refrigerant circulation m according to its respective load.

Figures 6 and 7 are the actual hl! ! This is an example of experimental results. For ease of understanding, in Fig. 6, the required inverter output frequency Fa from the indoor unit 1° (2 [HP]) is set as Fa = 30.50.80.
[82], and in each case, change the required inverter output frequency F, from B indoor unit 1 b<3 [1N'l) to ", = 30 to 8017]! Kotoki, A, B Performance of each indoor unit 1.1b
Filter cooling capacity W, W, and total cooling capacity W1 (=W, +
Wb) represents which J, uni change 1゛(
The solid line, broken line, and chain line are at Fa=30.50°80 (],
○ mark, Δ mark, mouth Fb = 30゜50.80 N-17
1 respectively).

In addition, in FIG. 7, contrary to FIG. 6, Fb is Fb=
30.50.80 For each case fixed at [H, ], " represents the changes in W, W, and a WT when changing F = 30 to 80a [+-1] ( The solid line, dashed line, and chain line are F, =
30.50.80 [1 to 12], ○ mark, Δ mark, and mouth correspond to F = 30.50.80 [+-17], respectively). Note that the horizontal axis is the output frequency r! of the inverter 21. I (combined, i] frequency aF,) or compressor 2
Represents an operating frequency of 0.

As can be seen from these figures, for an indoor unit that wants to increase or decrease its cooling capacity, the capacity can be changed in the range of about 60 to 100% according to the indoor load1! : For indoor units that can do so and do not want to change their capabilities, (i) the indoor unit's capabilities can change and b (b) can maintain almost the same capabilities. In addition, the same results as above were obtained when the required inverter output frequencies F and Fb of both indoor units were changed, when the combination of capacities C and C of the indoor units was changed, and when heating operation was performed. The results are 1q from the experiment.

In this way, in this embodiment, information on the indoor unit capacity Id is automatically and reliably transmitted to the multi-control microphone []] computer without any intervention by the JI operator, etc. Therefore, even if indoor units with different capacities are freely selected and connected to an outdoor unit, troubles related to incorrect setting of indoor unit capacity information can be reliably prevented. In addition, each indoor unit can individually exhibit the same capabilities as the required capabilities.

〔Effect of the invention〕

As explained above, according to the present invention, since information on the capacity of indoor units 1 to 1 is included in the operation command sent from the indoor unit, the installation (= Indoor unit capacity information is transmitted to the out-of-town unit in charge of control, eliminating troubles caused by errors in setting capacity information in the past, and making it possible to perform appropriate control according to each indoor unit (8). Also,
Since the capacity selection switch is no longer required, the configuration of the control circuit is simplified, contributing to miniaturization and improved reliability of the control circuit. In particular, multi-room air conditioner systems are likely to become more sophisticated and complex in the future, and the invention of water washing, which continues to become more sophisticated and complex, will be effective in improving the reliability of the system.

[Brief explanation of drawings]

Fig. 1 is a diagram showing the structure of the operation command output from one unit indoors in one embodiment of the present invention, Fig. 2 is a refrigerant piping system diagram of the same embodiment, and Fig. 3 is an information system diagram of the same example. , 4th
The figure shows the intake air temperature TA and room temperature set temperature T in the same example.
, and the required inverter output frequency F. FIG.
7 and 7 are diagrams showing changes in the cooling capacity W according to the first embodiment, and FIG. 8 is a diagram illustrating a conventional multi-room air conditioner. 1... Indoor unit, 2... Branch unit, 3...
・Outdoor unit, 5...indoor microcomputer,
9...Electric flow rate adjustment valve, 11...Gas side solenoid valve, 1
3...Multi-control microcomputer, 1
B... Four-way valve, 20... Compressor, 21...
Inverter, 22... outdoor microcomputer. Applicant's agent: Mr. Sato (b) Figure 1

Claims (1)

[Claims] In a multi-room air conditioner in which multiple indoor units are connected to an outdoor unit equipped with a compressor capable of capacity control operation, and each indoor unit operates according to operation commands sent from the indoor unit to the outdoor unit, the A multi-room air conditioner characterized in that a signal representing the capacity of the indoor unit is included in the operation command issued.