KR100842374B1 - High-capacity air-conditioning system using heat-pump - Google Patents

Abstract

A heat pump type high-capacity air conditioning system is provided to use a control system of an existing air conditioner system having indoor and outdoor units of the same number without any change by introducing individual controllers per the indoor unit and an additional multiple controller. A heat pump type high-capacity air conditioning system includes an outdoor unit part, an indoor unit part, an air circulation part(30), and a multiple controller(40). The outdoor unit part has a plurality of outdoor unit elements(10A) for supplying and recovering heating medium by a heat pump driven by a driving source. The indoor unit part has a plurality of heat exchangers(21) connected to the outdoor unit elements by pipes, expansion valves(23) connecting the heat exchangers to the outdoor unit elements, air supply fans(25), and individual controllers(20A) for controlling the expansion valves. The air circulation part has an air outlet for supplying the air heat exchanged by the heat exchanger of the indoor unit part to a room(R). The multiple controller applies main signals to the individual controllers for controlling the outdoor unit elements in sequence according to a capacity corresponding to the temperature to raise or lower when set temperature becomes different from real room temperature sensed by temperature sensors of the room.

Description

Heat pump type large capacity air conditioning system {HIGH-CAPACITY AIR-CONDITIONING SYSTEM USING HEAT-PUMP}

1 is a schematic configuration diagram of a heat pump type large-capacity air conditioning system according to the present invention;

2 is a block diagram related to the concept of a heat pump type large-capacity air conditioning system according to the present invention.

<Description of the symbols for the main parts of the drawings>

10: outdoor unit 10A: outdoor unit

11: heat pump 13: radiator

20: Indoor donation 20A: Individual controller

21: heat exchanger 23: expansion valve

25: supply fan 27: humidifier

29: filter 30: air circulation

31: air outlet 33: air intake

35: ventilation fan 37: plate heat exchanger

40: general controller 41: storage unit

43: receiver 45: comparison operator

47: transmitter S1: temperature sensor

S2: Humidity Sensor R: Room

The present invention relates to a heat pump type large-capacity air conditioning system that can be used in industrial facilities, churches, theaters, shopping malls, etc.

More specifically, in the conventional heat pump air conditioning system having a plurality of indoor units, due to the characteristics of the heat pump, it is not possible to configure one or a few large outdoor units (due to the limitation of capacity of commercialized outdoor units) and introduce a large number of small outdoor units (especially the same number as the indoor unit). I had to do it,

In the conventional air conditioning system, the system is implemented in such a way that the entire small-capacity outdoor units are turned on / off by the controller for each indoor unit according to the detection signals of the sensors (temperature and humidity) provided in the large room.

The set temperature and the actual room temperature

As the graph shows, the system is operated to approach the set temperature through a rapid temperature change process.

Compared to the severe waste of energy and the heavy load on the air conditioning system, it has caused trouble, serious failures, and reduced service life.

The present invention is advantageous in terms of cost because it can be used without changing the control device of the existing air conditioning system by introducing a separate general controller separately.

In addition, when a deviation between the set temperature and the actual room temperature occurs, sequential control according to the operating capacity of the outdoor unit required to compensate for the temperature difference

In general, the general controller commands individual indoor unit controllers to determine the number of outdoor units to be operated.

Secondly, through the individual controller of the indoor unit, the degree of opening of the expansion valve is determined to precisely control the operating capacity of the individual outdoor unit, which is operated (in particular, by giving a resistance value to the temperature sensor provided in the individual controller, Can be controlled to allow other virtual temperatures to be recognized)

The set temperature and the actual room temperature

It can be operated to converge while showing continuity in the form of drawing a smooth curve as shown in the graph

It is possible to reduce the deviation between the set temperature and the actual room temperature, thereby improving the constant temperature holding performance, and at the same time, the comfort of those who are active and living in the actual room.

Furthermore, in terms of energy efficiency and air conditioning system load,

The present invention relates to a heat pump type air conditioning system with improved constant temperature holding performance through sequential control of individual outdoor unit units (precise control of on / off and outdoor unit operating capacity).

In terms of energy efficiency, the air conditioning system is preferably a heat pump method, and the direction of induction through legal regulation or government (or local government) subsidies or tax benefits is also flowing to the heat pump method.

Meanwhile, as a related art related to a large-capacity air conditioning system that can be used in industrial facilities, churches, theaters, shopping malls, etc. by introducing a plurality of outdoor units and a plurality of indoor units, Utility Model Registration No. 0307425 (2003.03, 2003) .03) "Multi-type gas heat pump air conditioning system"

As mentioned above, although the registered utility model is a heat pump air conditioning system having a plurality of indoor units and the same number as described above, the entire outdoor units are turned on / off by the controllers for each indoor unit, thereby saving energy and temperature. It is disadvantageous in terms of continuity and precision of regulation and in terms of system durability, safety and stability.

In addition, there is a patent registration of Samsung Electronics Co., Ltd. No. 0667295 (2007.01.04) `` The control method of a multi-type air conditioner ''

A plurality of outdoor units are connected to a plurality of indoor units through a common pipe, and the outdoor unit includes an outdoor control unit for generating a variable capacity compressor and a duty control signal. The outdoor control unit and the outdoor control unit communicate with each other to allow the same outdoor unit to be loaded / unloaded. Since it is a form of sharing the loading duty required for capacity control to perform the unified operation in the loading cycle and time,

It differs from the concept and structure of this invention.

The present invention introduces a separate overall controller in addition to the individual controller of each indoor unit, compared to the conventional air conditioning system having a plurality of indoor units and a plurality of outdoor units, in particular heat pump air conditioning system,

When the deviation between the temperature set by the general controller and the actual room temperature occurs, the general controller first commands the individual indoor unit controller according to the capacity of the outdoor unit required to compensate for the temperature difference, and determines the number of outdoor units to be operated. By precisely controlling the opening capacity of the individual outdoor unit by operating the individual controller of the indoor unit and determining the opening degree of the expansion valve, the set temperature and the actual room temperature can be operated to converge while showing continuity in the form of a smooth curve. It is possible to reduce the deviation between the set temperature and the actual room temperature, improve the constant temperature holding performance, and at the same time improve the comfort of people living and living in the room, and furthermore, in terms of energy efficiency and air conditioning system load, General controller As it is introduced separately, it can be used without changing the control system of the existing air conditioning system, which is advantageous in terms of cost, and it is a heat pump type air conditioning system that has improved constant temperature keeping performance through on / off and precise control of outdoor unit operation capacity. It aims to provide.

In another aspect, the present invention is to provide a heat pump type air conditioning system incorporating a humidification function, ventilation function, prevention of energy waste through heat exchange between outdoor air and indoor air during ventilation, dehumidification function through precise temperature control, and other safety functions in case of emergency. The purpose.

Heat pump type large-capacity air conditioning system according to the present invention to achieve the above object

An outdoor unit including a plurality of outdoor unit units for supplying and recovering a heat medium by a heat pump operated by a driving source;

An indoor unit including a plurality of heat exchangers connected to the outdoor unit of the outdoor unit through respective pipes, an expansion valve connecting each of the heat exchangers and the outdoor unit, an air supply fan, and an individual controller to control the expansion valve;

An air circulation unit including an air outlet provided to supply air exchanged with heat from the heat exchanger of the indoor unit to a room; And

In order to sequentially control the outdoor unit units of the outdoor unit to be operated according to the amount of heat corresponding to the temperature to be raised or lowered when a difference between the actual room temperature and the set temperature detected by the temperature sensor provided in the room occurs. A general controller for applying a main signal to the individual controller;

It is made, including.

In addition, in the heat pump type large-capacity air conditioning system according to the present invention, the general controller sends a negative signal to the individual controller of the indoor unit in order to designate the operating capacity of all or part of the outdoor unit, to which the main signal is applied. Licensed,

Further, it is preferable that the sub-signals of the general controller impart a resistance value to the temperature sensor provided in the individual controller of the indoor unit so that a virtual temperature different from the actual temperature is recognized.

In addition, in the heat pump type large-capacity air conditioning system according to the present invention, when the overall controller has a temperature difference between a set temperature and an actual room temperature exceeding a primary reference value, the room temperature to be raised and lowered by the outdoor unit units operated by the individual controllers. It is preferred that the secondary reference value associated with is greater than or equal to the primary reference value.

In addition, the heat pump type large-capacity air conditioning system according to the present invention preferably further includes an air intake port provided with the air circulation unit in the room and a ventilation fan connected to the air intake port.

In addition, in the heat pump type large-capacity air conditioning system according to the present invention, the indoor air discharged from the air inlet of the air circulation unit is preferably discharged after heat exchange with the outside air introduced into the heat exchanger through the air supply fan of the indoor unit while passing through the heat exchanger.

In addition, the heat pump type large-capacity air conditioning system according to the present invention, it is preferable that the indoor base portion further comprises a humidifier.

In addition, it is preferable that the heat pump type large-capacity air conditioning system according to the present invention further includes a filter for external air in which the indoor unit is sucked by the air supply fan.

In addition, the heat pump type large-capacity air conditioning system according to the present invention applies the signal to the individual controller when the overall controller measured by the humidity sensor provided in the room is higher than the set humidity value. It is preferable to implement a dehumidification function by raising the temperature by a reference temperature by these.

In the heat pump type large-capacity air conditioning system according to the present invention, when the overall controller does not communicate with the individual controller for a reference time, it is preferable to stop the operation of the outdoor unit individual outdoor unit and issue an alarm signal. .

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

In each of the drawings, the same reference numerals, in particular, the tens and ones digits, or the same digits, tens, ones, and alphabets refer to members having the same function, and unless otherwise specified, each reference in the drawings. The member referred to may be regarded as a member conforming to these criteria.

In each figure, the dotted line shows the control relationship by the individual controller 20A of the indoor unit 20,

The dashed line indicates the control relationship by the general controller 40,

The dashed-dotted line shows the flow of the heat medium, indoor air, and outside air.

1 and 2, the outdoor unit 10 according to the present invention is composed of a plurality of individual outdoor unit (10A),

In each unit 10A, the heat medium is forcedly circulated by a heat pump 11 that is operated by a driving source (not shown) such as a motor (for EHP) or an engine (for GHP), and the radiator 13 The heat medium is to heat exchange.

In addition, the indoor unit 20 has a plurality of, in particular, the outdoor unit unit 10A and the same number of heat exchangers 21 are connected to each other by a separate pipe (not named),

An expansion valve 23 and an air supply fan 25 connecting the heat exchangers 21 and the outdoor unit;

In particular, the expansion valve is configured to control on / off and movable capacity (particularly, an outdoor unit's movable capacity) by an individual controller 20A.

In addition, the indoor air unit 20 is heat-exchanged after passing the humidifier 27 to the outside air exchanged for humidity control, and the outside air introduced to the humidifier is filtered through a separate filter 29.

However, the arrangement of the filters for filtration of room inlet air

As will be described later, the cold (summer) or warm (winter) indoor air discharged to the outside by the ventilation fan 35 for the ventilation of the air circulation unit 30 of the room (R) in a separate heat exchanger (37) Since the heat exchange with the outside air to be introduced into the room by the air supply fan 25 is advantageous in terms of energy saving

A separate filter is provided in front of the heat exchanger 37, and if necessary, the filter arranged in front of the humidifier may be omitted.

The air supply fan 25 and the humidifier 27 may be controlled by the individual controller 20a. However, the air supply fan 25 and the humidifier 27 may be controlled by the general controller 40 which will be described later for controlling the air conditioning system which is a whole whole in an emergency.

Outside air cooled (summer) or heated (winter) in the heat exchanger 21 of the indoor unit 20 is supplied through the air outlet 31 provided in the room R, in particular, the ceiling,

In the case of constituting the ventilation system, the indoor air sucked by the ventilation fan 35 is separated from the air inlet 33, in particular, the outlet 31, so that the incoming and outgoing air is mixed and discharged without passing the cold or warm air. To prevent things

Far from the outlet, so is discharged through the air inlet 33 provided in the lower portion of the room (R),

As described above, the cold or warm air is transferred to the outside air in the heat exchanger 37,

In general, the air circulation unit 30 is configured.

Next, a multiple controller that forms the core of the present invention has a temperature to be raised or lowered when a difference between the actual room temperature and the set temperature detected by the temperature sensor S1 provided in the room R occurs. The outdoor unit 10A of the outdoor unit 10 to be operated according to the corresponding heat amount is sequentially controlled.

That is, the overall controller 40 applies a main signal to the individual controller 20A of the indoor unit 20 to determine on / off for each outdoor unit 10a.

In addition, in order to designate the movable capacity of all or part of the outdoor unit unit 10A to which the operation main signal is applied (possible by designating application method of the individual resistance value), the individual controller 20A of the indoor unit 20 is provided. A negative signal is applied.

In particular, the sub-signals of the general controller 40 are provided with a resistance value to the temperature sensor provided in the individual controller of the indoor unit so that a virtual temperature different from the actual temperature is recognized. Since it is not necessary to modify the control relationship of the air conditioning system provided with the same number of indoor units as the outdoor unit, the construction and the control are advantageous, and there is no error occurrence is preferable.

The overall controller 40 will be basically composed of a microcomputer, a storage unit 41 storing a reference value, etc., a receiving unit 43 receiving an external signal, and a comparison calculation unit 45 for comparing and determining a signal value of the receiving unit with a reference value of the storing unit. And a transmitter 47 for authorizing the appropriate command.

The overall controller 40 is operated by the individual controllers 20A when the temperature difference between the set set temperature and the actual room temperature read by the temperature sensor S1 exceeds a primary reference value (for example, 0.5 ° C.). The secondary reference value associated with the room temperature to be raised and lowered by the outdoor unit units 10A is suitable for maintaining the actual indoor temperature at a temperature closest to the set temperature that is higher than or equal to the primary reference value (for example, 1 ° C). .

In addition, the introduction of the humidity control function, the overall controller 40 receives the humidity information from the humidity sensor (S2) provided in the room (R),

In particular, when the actual room humidity is higher than the set humidity value input during the summer, a signal is applied to the individual controller 20A to increase the temperature by the reference temperature (for example, 1 ° C.) by the outdoor unit to implement a dehumidification function. do.

In addition, the dehumidification operation of the overall controller starts when the difference between the actual humidity and the set humidity is higher than the stored reference value (relative humidity 1%),

In addition, the dehumidification operation is performed only when the actual room temperature is lower than the set temperature value, thereby preventing the temperature holding condition of the room from being broken or the comfort falling by unnecessary dehumidification operation.

In addition, during the winter heating operation, the overall controller 40 compares the set temperature with the actual room temperature, and determines the room temperature by the individual controller 20A per reference temperature difference (for example, 0.5 ° C.). Heating can be achieved by increasing the temperature of the heat pump (ie, reducing the temperature of the heat pump by a reference temperature (eg -1 ° C)).

Dehumidification can be controlled by setting the cooling stage to zero for controlling humidity.

On the other hand, in the case of the GHP of the winter heat pump system, the heating medium is heated by the engine coolant, so defrosting operation is generally unnecessary.

The EHP system requires defrosting, in which case the problem of cold air entering the room is a big complaint from users.

However, in the case of implementing the EHP system based on the heat pump type large-capacity air conditioning system according to the present invention, even during the defrosting operation, some outdoor unit units are normally operated by sequential control by individual controllers, that is, by individual control of each expansion valve. And some outdoor unit can defrost operation can prevent the problem of cold wind flowing into the room.

In addition, in order to enhance the safety function, when the overall controller 40 does not communicate with the individual controller 20A for a reference time (for example, 5 seconds), the outdoor unit 20 of the individual outdoor unit 20A All operations can be stopped, alarm signals (sound and / or light emission) can be emitted, and in particular connected to the building's central control unit for perfect implementation of intelligent building systems, which can be linked to fire protection.

Then, when the communication line is restored, the data is extracted, the output of the outdoor unit 20A is turned on, and normal summer or winter operation is performed.

In order to provide such a system control function in the emergency controller 40, the air supply fan 25 and the humidifier 27 of the indoor unit may be controlled by the general controller 40.

As described above, the heat pump type large-capacity air conditioning system according to the present invention introduces a separate general controller in addition to the individual controller of each indoor unit to form an air conditioning system having a plurality of indoor units and a plurality of outdoor units (especially the same number of indoor units). When the deviation between the temperature set by the general controller and the actual room temperature occurs, the overall controller first commands the individual indoor unit controller according to the capacity of the outdoor unit required to compensate for the temperature difference, and determines the number of outdoor units to be operated. By precisely controlling the opening capacity of the individual outdoor unit by operating the individual controller of the indoor unit and determining the opening degree of the expansion valve, the set temperature and the actual room temperature can be operated to converge while showing continuity in the form of a smooth curve. There is set temperature and actual room on Can improve the temperature stability, and at the same time improve the comfort of people who live and live in the room. Furthermore, it is advantageous in terms of energy efficiency and air conditioning system load. It can be used as it is without changing the control system of the air conditioning system, which is advantageous in terms of cost, and thus the constant temperature holding performance can be increased through on / off of each individual outdoor unit unit and precise control of the operating capacity of the outdoor unit, and furthermore, a humidification function and a ventilation function. It can provide heat pump type air-conditioning system that introduces energy saving prevention through heat exchange between outdoor air and indoor air during ventilation, dehumidification function through precise temperature control, and stable function in case of emergency.

In the above description, the conventional well-known techniques related to the air conditioning system, the heat pumps (GHP and EHP), the humidity control, etc. are omitted, but those skilled in the art will naturally be able to infer and deduce them.

In the above description of the present invention with reference to the accompanying drawings, a specific configuration of the air conditioning system having air and heat medium flow, but the present invention can be variously modified and changed by those skilled in the art, such modifications and changes are the present invention It should be interpreted as falling within the protection scope of.

Claims (11)

An outdoor unit including a plurality of outdoor unit units for supplying and recovering a heat medium by a heat pump operated by a driving source; An indoor unit including a plurality of heat exchangers connected to the outdoor unit of the outdoor unit through respective pipes, an expansion valve connecting each of the heat exchangers and the outdoor unit, an air supply fan, and an individual controller to control the expansion valve; An air circulation unit including an air outlet provided to supply air exchanged with heat from the heat exchanger of the indoor unit to a room; And In order to sequentially control the outdoor unit units of the outdoor unit to be operated according to the amount of heat corresponding to the temperature to be raised or lowered when a difference between the actual room temperature and the set temperature detected by the temperature sensor provided in the room occurs. A general controller for applying a main signal to the individual controller; Heat pump type large capacity air conditioning system made, including. The method of claim 1, wherein the overall controller is A heat pump type large-capacity air conditioning system, characterized in that a negative signal is applied to an individual controller of the indoor unit to designate a movable capacity of all or part of the outdoor unit, to which a main signal is applied. The sub-signal of claim 2, wherein the sub-signal of the controller is Heat pump type large-capacity air conditioning system, characterized in that the virtual temperature is different from the actual temperature by giving a resistance value to the temperature sensor provided in the individual controller of the indoor unit. The method of claim 1, wherein the overall controller is If the temperature difference between the set temperature and the actual room temperature exceeds the primary reference value, And a secondary reference value associated with a room temperature to be raised and lowered by the outdoor unit units operated by the individual controllers is equal to or greater than the primary reference value. The method of claim 1, wherein the air circulation unit An air inlet provided in the room, Heat pump type high-capacity air conditioning system, characterized in that it further comprises a ventilation fan connected to the air intake. The method of claim 5, wherein The indoor air sucked by the air inlet 33 of the air circulation unit 30 and discharged to the outside passes through the heat exchanger 37. Heat pump type large-capacity air conditioning system, characterized in that discharged after heat exchange with the outside air introduced through the heat exchanger (37) through the air supply fan 25 of the indoor unit (20). The indoor unit according to any one of claims 1 to 4, wherein the indoor unit is Heat pump type large-capacity air conditioning system, characterized in that it further comprises a humidifier. The indoor unit according to any one of claims 1 to 4, wherein the indoor unit is Heat pump type large-capacity air conditioning system, characterized in that it further comprises a filter for the outside air sucked by the air supply fan. The integrated controller according to any one of claims 1 to 4, wherein If the actual room humidity measured by the humidity sensor provided in the room is higher than the set humidity value, Heat pump type large-capacity air conditioning system, characterized in that to implement a dehumidification function by applying a signal to the individual controller to increase the temperature by a reference temperature by the outdoor unit. The method of claim 9, The dehumidifying operation of the overall controller is a heat pump type large-capacity air conditioning system, characterized in that the difference between the actual humidity and the set humidity is higher than the stored reference value. The method according to any one of claims 1 to 4, If the overall controller does not communicate with the individual controller during the reference time, To stop the operation of the outdoor unit individual outdoor unit; Heat pump type large-capacity air conditioning system, characterized in that to issue an alarm signal.

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