JPS61147043A - System for controlling system of air conditioning apparatus - Google Patents

Abstract

PURPOSE:To make it possible to set a stable driving condition by setting a water temperature value between an extraordinary temperature determined by a predetermined external air temperature and a body thermostat possessed by a cool-warm water generator to stop a cool-warm water generator, in the case of using one primary pump. CONSTITUTION:A plurality of air conditioning apparatuses are remote-controlled by transmission means. In the case of using a single circulation pump on the heat source side, when the temperature of the air conditioning system reaches an outlet water temperature value of the air conditioning apparatus determined by a predetermined external air temperature, the air conditioning apparatus in operation is stopped even when the concentrated outlet water temperature of the air conditioning apparatus does not reach a predetermined set value. In a case where the minimum outlet water temperature of the air apparatus in operation determined by a predetermined external air temperature is higher than the temperature of a freeze preventing thermostat and the air conditioning apparatus stops its operation, a signal is emitted from a relay for multiplex transmission to a concentration controller through transmission means, and the restarting order of the air conditioning apparatus is made in such a manner that the restarting of the air conditioning apparatuses is carried out in the order from one having lowest workability successively to one having the highest.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a system control method for air conditioners that generates cold and hot water while controlling the capacity using a plurality of cold and hot water generating air conditioners.

[Conventional technology]

FIG. 1 is a block diagram showing the overall configuration of a system control method for air conditioners according to the present invention, and will be used to explain a conventional system control method for air conditioners.

In FIG. 1, l is a centralized controller (hereinafter referred to as
This is called a master unit) and is adapted to control a plurality of cold/hot water generators 31 to 3d as air conditioners. These cold/hot water generators 3a to 3d are provided with multiplex transmission repeaters (hereinafter referred to as child units) 211 to 2d, respectively.

These slave units 2a to 2d receive the signal from the base unit l,
Cold and hot water generator! A multiplex transmission repeater (hereinafter referred to as temperature detection slave unit) 5 is installed between the base unit 1 and the base unit 1 and the base unit 1 which converts the signals 3a to 3d into control signals. or connected.

The cold and hot water generators 3a to 3d are connected in parallel, and one end of each is connected to a plurality of circulation pumps 7 (hereinafter referred to as secondary pumps) on the load side via piping A1.

The outlet side of each of these secondary pumps 7 is, for example,
It is connected to piping A2 via a load 8 such as a fan coil unit or an air handler unit.・This piping A2 is connected to the cold/hot water generator 3a through a heat source side circulation pump 4 (hereinafter referred to as the primary pump). 3d.

A bypass pipe 6b is connected between the pipes A1 and A2. This bypass piping 6b is provided with a bypass valve 6a. The bypass valve 6a is for adjusting the flow balance between the heat source side and the load side.

FIG. 2 is a block diagram showing the detailed internal configuration of the base unit 1, slave units 2a to 2d, and temperature detection slave unit 5 in the system control device for air conditioning equipment of the present invention shown in FIG. 1. When explaining this, FIG. 2 will also be referred to.

In FIG. 2, the slave unit is represented by the reference numeral 2, and the master unit 1, slave unit 2, and temperature detection slave unit 5ti each have the same configuration. Therefore, in order to avoid duplicate explanation, In the following, the base unit 1 will be described as a representative, and corresponding parts of the slave unit 2 and the temperature detection slave unit 5 will be given the same reference numerals.

In the main unit 1, the microcomputer 9 has a power supply 10
Power is being supplied from.

The microcomputer 9 includes a data memory 9a (RA
M), a program memory 9b (ROM) is built-in. The microcomputer 9 is connected to each multiplex transmission circuit unit 11 in the temperature detection slave unit 5 and slave unit 2 via a multiplex transmission signal line 14.

This multiplex transmission signal line 14 connects the base unit 1, the temperature detection slave unit 5, and the slave unit 2, and is used as a transmission means.

The microcomputer 9 also has an A/D (analog/
It is connected to the digital) converter 12 and the input/output section 15. In the case of the A/D converter 1 and the lever machine 5, the A/D converter 12 is connected to a central outlet water temperature detection sensor 13 and an outside air temperature detection sensor 16 such as a thermistor sensor.

On the other hand, the input/output unit 15 processes various input/outputs, and in the main unit 1, various key manual inputs, mode setting inputs,
A display output circuit (not shown) is configured.

The slave unit 2 includes various interfaces for controlling a cold/hot water generator (representatively indicated by reference numeral 3), and the temperature detection slave unit 5 includes temperature detection of the A/D converter 12. In addition to the interface, it also has interfaces for pump operation, etc.

In the system control method for air conditioning equipment configured in this way, conventionally, during cooling, when the load on the secondary side is large and all units of cold/hot water generators 3a to 3d are operated, a centralized outlet is used. Temperature detector unit 5 that detects water temperature
It is possible to set the temperature detected at 5 to 7°C (setting on the main unit 1 side), and the temperature of the concentrated outlet water can also be suppressed to 5 to 7°C.

[Problem that the invention seeks to solve]

However, if we shift to capacity control in which one unit is stopped in order to save energy when the load decreases or the outside temperature drops, and the cold/hot water generator 3a is stopped, the inlet/outlet water temperature of the cold/hot water generator 3a is are equal, and water with an inlet water temperature of 12°C exhibits the same state as 1/4 bypass.

In other words, centralized output water temperature TTH% input water temperature T! , from the outlet water temperature Tea of the cold and hot water generator 3a to the cold and hot water generator 3
A patent characterized by the outlet water temperature Tod of d and the inlet/outlet temperature difference based on the capacity of the cold/hot water generator on the heat source side Ton-TTH ("Zutama") Δt ・・・・・・・・・・・・
・・・・・・・・・・・・(1) n (n is the number of units). That is, in order to control the 1 concentration outlet water temperature TTH to 17°C during T capacity control operation, if the inlet/outlet temperature Δt is set to 5°C, Toi-7-(-8-T-!-)x5-3.25 ℃, the inside of the cold/hot water generator will appear at a temperature close to 0℃, and the anti-freeze thermostat will abnormally shut down to prevent freezing.

For this reason, the temperature of the outlet water supplied to the load cannot be lowered below 12 to 13 degrees Celsius when the capacity control by one unit control is compensated, and it satisfies the standard of 7 to 8 degrees Celsius for the inlet temperature needle on the load side. Can not do it.

That is, during the intermediate period when the load is light, there is a problem in that freezing abnormality occurs before a predetermined water temperature is obtained.

As described above, in the conventional air conditioning system control method, a freezing abnormality occurs during capacity control during intermediate periods and light loads, which significantly impairs the reliability of the system.

This invention was made in order to solve such problems.The purpose of this invention is to obtain an air conditioning system control method that can maintain a stable operating state even during capacity control operation when there is only one primary pump. @ [Means for solving the problem] The air conditioning system control method according to the present invention is -primary pump 1
In the case of a system configuration in which the cold/hot water generator is used, the water temperature value is set between the abnormal temperature determined by the predetermined outside air temperature and the body thermostat of the cold/hot water generator, and the cold/hot water generator is stopped. It is something.

[For production]

In this invention, in the case of a system configuration in which one primary pump is applied, the cold/hot water generator is stopped according to a water temperature value determined based on a predetermined outside air temperature, and the cold/hot water generator is operated at an abnormal freezing temperature. to prevent

〔Example〕

Embodiments of the air conditioning system control method of the present invention will be described below. Regarding the configuration of the present invention, W,
1 figure and? This is as described with reference to FIG. 42, and the operation will be explained here.

FIG. 3 is a flowchart showing the flow of operation of the present invention, and the flow of operation will be explained based on this FIG. First, step 17 is performed by a mode determination section for a system in which one primary pump is applied in the system.If this is a system in which eleven differentials are applied, the following flow is executed.

That is, in step 18, the minimum stop temperature Tos at the outlet of the cold/hot water generator is determined based on the outside air temperature, and the central outlet water temperature TTH, which is always stored in the data memory 9 in the microcomputer, is set by the main unit. When it is detected that the water concentration has decreased below the set water concentration Ts, capacity control is started (step 19).

When entering this capacity control, a stop signal is issued in step 20 to the cold/hot water generator having the highest operating rate among the cold/hot water generators in operation whose rotation rate is determined.

When capacity control operation starts, as mentioned above, the stopped cold/hot water generator becomes a bypass pipe and cannot reach the predetermined temperature, so the outlet water temperature T of the cold/hot water generator in operation decreases.
on is lower than the central outlet water temperature TTH.

Next, in step 21, the outlet stop water temperature To of the cold/hot water generator having a temperature value between the body thermostat temperature value determined in step 18 and the freezing abnormality detection temperature value is determined.
s or less, the cold/hot water generator that has reached the outlet stop temperature ToslC of the cold/hot water generator is stopped (step 22).

Therefore, freezing abnormality as shown in the conventional example does not occur.

Also, in this case, a stop signal is sent from the slave unit 2 to the base unit 1, and the normal rotation function for adjusting the operating rate (stopping the unit with the highest operating rate and starting the unit with the lowest operating rate) Therefore, in step 23, if the central outlet water temperature TTH rises above the set water concentration T and restarts, an operation signal is issued to the stopped unit with the lowest operating rate ( Step 24).

Further, in this case, as shown in step 23, it is assumed that the exit stop water concentration ROM of the cold/hot water generator has also increased, as has the outlet water temperature TO of the cold/hot water generator.

In the above embodiment, in the centralized system, the outlet water temperature value of the cold/hot water generator is sent to the main unit 1, and the stop signal is issued from the main unit 1. Even if an individual thermostat having a set temperature slightly higher than the freezing abnormality detection temperature value of the cold/hot water generator is installed, the same effect can be obtained.

〔Effect of the invention〕

As explained above, this invention is an air conditioner whose capacity is being controlled by the outlet stop water concentration of the cold/hot water generator, which is determined between the set value by the freezing abnormality thermostat determined at a predetermined outside temperature and the set value by the body thermostat. Since the operation of the cold/hot water generator is stopped by a stop command output from the main unit, stable operation is possible without freezing abnormalities, and the operating rate can be made uniform. Therefore, the cold/hot water generating device has effects such as a longer lifespan.

[Brief explanation of drawings]

Fig. 1 is a block diagram showing the configuration of the conventional air conditioning system control method and the present invention, and Fig. 2 is a block diagram showing the internal configuration of the main unit, slave unit, and temperature detection slave unit in the air conditioning system control method of Figure 1. , FIG. 3 is a flowchart showing the operation flow of the air conditioning system control method of the present invention. 1... Master unit, 2, 2 i-2 d-child unit, 3.3a
~3d...Cold/hot water generator, 4...Primary pump, 5
...Temperature detection slave unit, 8...Load. Note that the same reference numerals in the figures indicate the same or corresponding parts. Agent Masuo Oiwa (and 2 others) Figure 3 Procedural amendment (voluntary) 1. Indication of case Patent application No. 1982-271238 2.
Title of the invention System control method for air conditioning equipment 3, Representative of the person making the amendment: Hitoshi Katayama 5, Subject of the amendment (1) Detailed description of the invention in the specification column 6, Contents of the amendment (1) Specification No. On page 5, lines 7 to 9, [detection sensor 1
3 is connected to an outside air temperature detection sensor 16 such as a thermistor sensor. " is corrected to "The detection sensor 13 and the outside temperature detection sensor 16 (for example, a thermistor sensor etc. are connected."). (2) On page 5, line 19 of the same page, "has. ] has been corrected to "has. (not shown)". (3) On the 7th page, line 12, "inlet temperature needle reference" has been replaced with "inlet temperature reference". (4) On page 10, line 4, "Outlet water temperature TonJ" is corrected to "Outlet water temperature ToJ."

Claims (3)

[Claims] (1) In a system control method for air conditioning equipment that remotely controls multiple air conditioning equipment using a transmission means, when there is only one circulation pump on the heat source side, the outlet water temperature of the air conditioning equipment is determined based on a predetermined outside air temperature. A system control method for air conditioning equipment, characterized in that when the outlet water temperature of the air conditioning equipment reaches this value, the air conditioning equipment in operation is stopped even if the central outlet water temperature of the air conditioning equipment does not reach a predetermined set value. (2) The system control method for air conditioning equipment according to claim 1, wherein the lowest outlet water temperature of the air conditioning equipment determined at a predetermined outside air temperature is higher than the antifreeze thermostat. (3) Even when the air conditioner stops operating by detecting the outlet water temperature of the air conditioner determined by the predetermined outside air temperature, a signal is sent from the multiplex transmission repeater to the central controller through the transmission means and the air conditioner is activated. 2. The system control method for air conditioning equipment according to claim 1, wherein the restart order is used as a rotation signal for restarting the air conditioning equipment with the lowest operating rate to the highest operating rate in order.