KR101961168B1 - Control method of multi heat pump system using multiple heat source with air heat source cooling operation and simultianeous operation of water heat source cooling and heating - Google Patents

Abstract

The present invention relates to a control method of a multi-heat source multi-heat pump capable of switching between an air heat source cold storage operation and a hydrothermal source cold storage heat storage operation simultaneously without using four sides. More specifically, the present invention relates to a water-cooled condenser and an air- Cooling and heat accumulating operation and the cooling and cooling single operation are performed at a low compression ratio and at a low compression ratio without using the four sides of the compressor, So that it is possible to continuously drive the apparatus even when the apparatus is switched on and off so that the operation efficiency can be increased and the air heat source cooling operation and the heat source circulation cooling Heat source multi-heat pump system having simultaneous heat storage operation.

Description

[0001] The present invention relates to a multi-heat source multi-heat pump system, and more particularly, to a multi-heat source multi-heat pump system having a multi-heat source multi- }

The present invention relates to a control method of a multi-heat source multi-heat pump system capable of switching between an air heat source cold storage operation and a heat source circulation heat accumulation heat accumulation operation simultaneously without using four sides.

Generally, a heat pump is one of the air conditioning devices that can function as cooling and heating by reversing the flow of the refrigerant in the cooling cycle of the air conditioner. In particular, The use area is expanding.

The conventional heat pump includes a compressor for compressing a refrigerant and an outdoor heat exchanger connected to the compressor by a pipe to serve as a condenser for cooling and an evaporator for heating, An indoor heat exchanger serving as an evaporator and serving as a condenser at the time of heating, and a four-way valve for supplying the high-temperature and high-pressure refrigerant from the compressor to the outdoor heat exchanger during cooling and supplying the refrigerant to the indoor heat exchanger during heating.

However, in the case of the conventional heat pump having such a configuration,

(Or heating) is used, or only the axial cooling (or cooling) is used. In addition, the heat storage and the cooling can not be used at the same time.

Korea Registered Utility Model No. 20-0324295 (registered on August 12, 2003)

SUMMARY OF THE INVENTION It is an object of the present invention to solve the above-mentioned problems, and an object of the present invention is to provide a cooling apparatus and a cooling apparatus, which are capable of cooling cold water without using four sides through a plurality of condensers, In addition to the cooling function, the thermal storage function for providing hot water can be performed simultaneously with the cooling function or only the cooling function.

In other words, it is a hybrid type that combines the merits of hydrothermal and air heat. It is used as cooling water by producing cold water at the evaporator side, and at the same time, by using the waste heat, which is selectively discarded in the water / air- And to provide a control method for a multi-heat source multi-heat pump system having operation and simultaneous operation of heat source circulation and storage.

Other objects and advantages of the present invention will be described hereinafter and will be understood by the embodiments of the present invention. Further, the objects and advantages of the present invention can be realized by the means and the combination shown in the claims.

SUMMARY OF THE INVENTION The present invention, as a means for solving the above problems,

A first step (S10) in which the gaseous refrigerant at a low temperature and low pressure is compressed by a compressor (10) into a high-temperature and high-pressure refrigerant; The refrigerant discharged from the compressor 10 is transferred to the branch pipe S1 in which the first and second valves V1 and V2 are respectively installed and when cold water and hot water are simultaneously produced by the simultaneous operation of cold storage and storage, (S20) in which the ON / OFF control of the first and second valves (V1, V2) is performed and the moving direction of the refrigerant is controlled according to the case where only the cold water is intended to be produced. A third step (S30) in which the high-temperature and high-pressure refrigerant undergoes heat exchange with the water supply in the water-cooled condenser (20) when the refrigerant passes through the first valve (V1) and performs a heat storage function; A fourth step (S40) in which the high-temperature and high-pressure refrigerant undergoes heat exchange with the outside air by the air-cooled condenser (30) when passing through the second valve (V2); A fifth step (S50) in which the refrigerant passing through the water-cooled condenser (20) or the air-cooled condenser (30) is converted into a low-temperature low-pressure refrigerant through the electronic expansion valve (40); A sixth step (S60) in which the low-temperature low-pressure refrigerant passing through the electronic expansion valve (40) is heat-exchanged with the water in the evaporator (50), and the refrigerant subjected to the cooling function and heat-exchanged is circulated to the compressor (10); Cooling condenser 20, the air-cooled condenser 30, the electronic expansion valve 40 and the evaporator 50 are integrally formed in one case, and the sixth step S60 And the second valve V2 is operated to simultaneously generate cold water and hot water by simultaneous operation of cooling and storing heat, The first valve V1 is turned off and only the second valve V2 is kept in the ON state when the first valve V1 is kept ON and the cold water alone is to be produced by the cold- So that the compressor 10 can be selectively switched without stopping the compressor 10 at low compression ratios without using the four sides in the water-cooled type, the air-cooled type, or the cooling / heating simultaneous operation and the cooling and cooling single operation.

As described above, according to the present invention, a single apparatus includes a plurality of air-cooled and water-cooled condensers, and selectively controls the flow of the refrigerant to control the flow of the refrigerant. Thus, the cooling function is always used, (Ratio of high pressure / low pressure) or the intake temperature and the outside temperature, the compressor can be used without stopping the compressor at low compression ratio. As a result, it is possible to perform the simultaneous operation of the cooling / heat accumulation and the control of the switching operation of the cooling and the independent operation, and the operation can be continuously performed without turning on / off the product.

Further, according to the present invention, it is possible to simultaneously produce cold water for cooling and hot water for hot water supply using only a single device, thereby reducing facility investment and operation cost.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a flowchart of an embodiment of a control method of a multi-heat source multi-heat pump system according to the present invention.
FIG. 2 is a refrigerant flow chart of one embodiment showing a state during simultaneous cooling / storage heat operation according to the present invention. FIG.
FIG. 3 is a refrigerant flow chart according to an embodiment showing a state during the hot-watering single operation according to the present invention; FIG.

Before describing in detail several embodiments of the invention, it will be appreciated that the application is not limited to the details of construction and arrangement of components set forth in the following detailed description or illustrated in the drawings. The invention may be embodied and carried out in other embodiments and carried out in various ways. It should also be noted that the device or element orientation (e.g., "front,""back,""up,""down,""top,""bottom, Expressions and predicates used herein for terms such as "left,"" right, "" lateral, " and the like are used merely to simplify the description of the present invention, Or that the element has to have a particular orientation. Also, terms such as " first "and" second "are used in this specification and the appended claims for the purpose of description and are not intended to indicate or imply their relative importance or purpose.

The present invention has the following features in order to achieve the above object.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Reference will now be made in detail to the preferred embodiments of the present invention, examples of which are illustrated in the accompanying drawings. Prior to this, terms and words used in the present specification and claims should not be construed as limited to ordinary or dictionary terms, and the inventor should appropriately interpret the concepts of the terms appropriately It should be interpreted in accordance with the meaning and concept consistent with the technical idea of the present invention based on the principle that it can be defined.

Therefore, the embodiments described in this specification and the configurations shown in the drawings are merely the most preferred embodiments of the present invention and do not represent all the technical ideas of the present invention. Therefore, It is to be understood that equivalents and modifications are possible.

According to one embodiment of the present invention,

A first step (S10) in which the gaseous refrigerant at a low temperature and low pressure is compressed by a compressor (10) into a high-temperature and high-pressure refrigerant; The refrigerant discharged from the compressor 10 is transferred to the branch pipe S1 in which the first and second valves V1 and V2 are respectively installed and when cold water and hot water are simultaneously produced by the simultaneous operation of cold storage and storage, (S20) in which the ON / OFF control of the first and second valves (V1, V2) is performed and the moving direction of the refrigerant is controlled according to the case where only the cold water is intended to be produced. A third step (S30) in which the high-temperature and high-pressure refrigerant undergoes heat exchange with the water supply in the water-cooled condenser (20) when the refrigerant passes through the first valve (V1) and performs a heat storage function; A fourth step (S40) in which the high-temperature and high-pressure refrigerant undergoes heat exchange with the outside air by the air-cooled condenser (30) when passing through the second valve (V2); A fifth step (S50) in which the refrigerant passing through the water-cooled condenser (20) or the air-cooled condenser (30) is converted into a low-temperature low-pressure refrigerant through the electronic expansion valve (40); A sixth step (S60) in which the low-temperature low-pressure refrigerant passing through the electronic expansion valve (40) is heat-exchanged with the water in the evaporator (50), and the refrigerant subjected to the cooling function and heat-exchanged is circulated to the compressor (10); Cooling condenser 20, the air-cooled condenser 30, the electronic expansion valve 40 and the evaporator 50 are integrally formed in one case, and the sixth step S60 And the second valve V2 is operated to simultaneously generate cold water and hot water by simultaneous operation of cooling and storing heat, The first valve V1 is turned off and only the second valve V2 is kept in the ON state when the first valve V1 is kept ON and the cold water alone is to be produced by the cold- So that the compressor 10 can be selectively switched without stopping the compressor 10 at low compression ratios without using the four sides in the water-cooled type, the air-cooled type, or the cooling / heating simultaneous operation and the cooling and cooling single operation.

It is also preferable that the temperature sensors T1 and T2 are provided on the water inlet side of the water-cooled condenser 20 and the evaporator 30 and the temperature of the temperature sensors T1 and T2 satisfies the preset storage temperature or the predetermined temperature , The compressor (10) can be stopped or the compressor (10) can be operated when the temperature of the temperature sensors (T1, T2) does not satisfy the preset storage temperature or the preset cooling temperature.

The check valves C1 and C2 are provided between the water-cooled condenser 20 and the air-cooled condenser 30 and the electronic expansion valve 40 so that the water-cooled condenser 20 and the air-cooled condenser 30 are selectively driven , The refrigerant flows only through the electronic expansion valve (40) so that the refrigerant does not flow in the reverse direction.

The first and second pressure sensors P1 and P2 are provided on the front and rear ends of the compressor 10 and the temperature sensors T1 and T2 are provided on the water inlet side of the water-cooled condenser 20 and the evaporator 50, And the outdoor air temperature sensor (T3) is installed on the side of the air-cooled condenser (30), and the water temperature-cooling type, the air-cooling type or the cooling / And the automatic switching control of the operation and the cooling and cooling operation is performed.

Hereinafter, a control method of the multi-heat source multi-heat pump system having the air heat source cold storage operation and the hydrothermal source co-axial heat storage operation according to the preferred embodiment of the present invention will be described in detail with reference to FIG. 1 to FIG.

The control method of the multi-heat source multi-heat pump system having the air heat source cold storage operation and the simultaneous operation of heat source circulation heat storage and cooling according to the present invention comprises the control method of the first to sixth steps, The pump devices include a compressor 10, a water-cooled condenser 20, an air-cooled condenser 30, an electronic expansion valve 40, an evaporator 50, first and second valves V1 and V2, C1, C2).

1. A first step (S10) in which a gaseous refrigerant at a low temperature and a low pressure is compressed by a compressor 10 at a high temperature and a high pressure,

The low-temperature low-pressure, gaseous refrigerant is compressed by the compressor 10 and compressed into high-temperature and high-pressure refrigerant, through which the heat-exchanged low-temperature low-pressure gaseous refrigerant is re-introduced and circulated through the evaporator 50 to be described later.

2. When the refrigerant discharged from the compressor 10 is moved to the branch pipe S1 in which the first and second valves V1 and V2 are respectively installed and the cold water and the hot water are simultaneously produced by the simultaneous operation of axial cooling and thermal storage, (S20) in which ON / OFF control of the first and second valves (V1, V2) is performed and the direction of movement of the refrigerant is controlled according to the case where only cold water is to be produced by the cold storage operation,

The refrigerant compressed through the first step S10 and converted into a high temperature and high pressure is branched to one of the compressors 10 and a plurality of condensers (water-cooled condenser 20 and air-cooled condenser 30) Section.

To this end, a portion of the pipe connecting the compressor 10 and the plurality of condensers is divided into two pipes connected to the plurality of condensers, and a first valve V1 is installed in the pipe connected to the water-cooled condenser 20 , And a second valve (V2) is installed in a channel connected to the air-cooled condenser (30).

Thus, when it is desired to simultaneously produce cold water and hot water by simultaneous operation of cold storage and thermal storage, the second valve V2 is turned OFF (the air-cooled condenser 30 is not used), and the first valve V1 is kept ON Thus, only the liquid-cooled condenser 20 and the evaporator 50 pass the refrigerant,

The first valve V1 is turned off (the water-cooled condenser 20 for the cooling is not used), and only the second valve V2 is kept in the ON state, Cooled condenser 30 in which the refrigerant is heat-exchanged without being cooled, and then only the evaporator 50 can be cooled while being cooled.

3. A third step (S30) in which the high-temperature and high-pressure refrigerant undergoes heat exchange with the water supply in the water-cooled condenser 20 when the refrigerant passes through the first valve (V1)

As described above, when cold water and hot water are simultaneously produced by simultaneous operation of axial cooling and thermal storage, the refrigerant discharged from the compressor 10 is passed through.

The water-cooled condenser 20 exchanges heat between the high-temperature and high-pressure refrigerant of the compressor 10 with water to perform a heat storage function for storing hot water used for heating, hot water supply, and the like.

4. In a fourth step (S40) in which the high-temperature and high-pressure refrigerant undergoes heat exchange with the outside air by the air-cooled condenser (30) when the second valve (V2)

As described above, in the case where only the cooling function is to be used through the evaporator 50 to be described later, a fan or the like, which is another heat exchanger, may be used without passing through the above-mentioned third stage water-cooled condenser 20 having a heat accumulating function Cooled condenser (30) is moved after the refrigerant discharged from the compressor (10) passes through heat exchange.

5. In a fifth step (S50) in which the refrigerant passing through the water-cooled condenser 20 or the air-cooled condenser 30 is changed to a low-temperature low-pressure refrigerant through the electronic expansion valve 40,

In the fifth step S50, the refrigerant passing through the water-cooled condenser 20 or the air-cooled condenser 30 passes through the electronic expansion valve 40 to lower the temperature and the pressure.

6. In a sixth step S60, the low-temperature low-pressure refrigerant passing through the electronic expansion valve 40 is circulated to the compressor 10 through the heat-exchanging function,

As a result of the refrigerant passing through the evaporator 50, the evaporator 50 exchanges the low-temperature low-pressure refrigerant through the electronic expansion valve 40 with the water supply.

Thus, the refrigerating function is enabled, and the refrigerant thus heat-exchanged continues to be repeatedly circulated to the compressor 10 described above.

Hereinafter, the multi-heat source multi-heat pump apparatuses for carrying out the first to sixth steps described above will be described.

When the low-temperature low-pressure refrigerant in the gaseous phase flows into the compressor (10), the compressor (10) compresses the refrigerant and transfers it to the condenser (water-cooled condenser (20) or air-cooled condenser (30)) with high temperature and high pressure refrigerant.

The water-cooled condenser 20 is installed in one apparatus together with the air-cooled condenser 30 in the present invention. The first and second valves V1 and V2, which will be described later, (20) or the air-cooled condenser (30) is determined.

The water-cooled condenser 20 functions to heat the high-temperature, high-pressure gaseous refrigerant of the compressor 10 through heat exchange with water supplied from the outside. Through the heat exchange, the temperature of the medium-temperature high- Liquid refrigerant in the state of being lowered and moved to the electronic expansion valve 40 to be described later.

The air-cooled condenser 30 is selectively used with the water-cooled condenser 20. When the vapor-phase high-temperature and high-pressure refrigerant of the compressor 10 flows into the air-cooled condenser 30, the air-cooled condenser 30 heat- And serves to transfer the refrigerant to the electronic expansion valve 40 in the form of a liquid refrigerant at low temperature and high pressure.

In the present invention, the condensing function is required through the evaporator 50 to be described later. According to the embodiment of the present invention, only the cooling function is used by using the air-cooled condenser 30, It is possible to selectively use the heat storage function at the same time as the hot water cooling function.

In the present invention, the compressor 10 is connected to the water-cooled condenser 20 through the branch pipe S1, the first valve V1 is connected to the water-cooled condenser 20, and the second valve V2 is connected to the air- 30) at the same time.

2, the user holds the first valve V1 connected to the water-cooled condenser 20 in the ON state, and the first valve V1 connected to the water-cooled condenser 20 is maintained in the ON state, The second valve V2 connected to the first valve 30 is turned off,

3, the first valve V1 connected to the water-cooled condenser 20 is turned off and the second valve V2 connected to the air-cooled condenser 30 is turned off. Only the ON state is maintained.

Thus, in the present invention, it is possible to perform the water-cooled type, the air-cooled type, the simultaneous cooling / heat storage simultaneous operation, and the cooling and cooling single operation by using the ON / OFF selection control of the first and second valves (V1, V2) The compressor 10 can be selectively switched without stopping the compressor 10.

In addition to the ON / OFF selection control of the first and second valves V1 and V2, the first pressure sensor P1 (low pressure sensor) is connected to the front end channel of the compressor 10, Cooled condenser 20 and the inlet-side temperature sensors T1 and T2 of the evaporator 50 and the air-cooled condenser 30 (high-pressure sensor) are installed in the rear- (T3) is installed on the side of the air conditioner (T3), and it is switched according to the ratio of the preset high pressure and the preset low pressure, and the water-cooled type and air- .

The water-cooled condenser 20 and the air-cooled condenser 30 are selectively connected to the lines of the refrigerant-type condenser 20 and the air-cooling type condenser 30 through lines connected to the electronic expansion valve 40, The refrigerant flows only in the electronic expansion valve 40 so that the refrigerant does not flow in the reverse direction.

As described above, the electronic expansion valve 40 reduces the temperature and pressure of the refrigerant at a high temperature and a high pressure (or a middle temperature and a high pressure) at a lower temperature to a pressure at which evaporation can occur. And moves the evaporator 50 to be described later.

The evaporator 50 is configured to heat-exchange the low-temperature and low-pressure liquid refrigerant, which has been moved through the above-described electronic expansion valve 40, with the feed water so that the feed water has a cooling function as cold water. And the refrigerant is circulated to the compressor (10).

In the present invention, temperature sensors T1 and T2 are provided on the water inlet side of the water-cooled condenser 20 and the evaporator 30, and the temperature of the temperature sensors T1 and T2 is set to a pre- The compressor 10 can be stopped or the compressor 10 can be operated when the temperature of the temperature sensors T1 and T2 does not satisfy the preset storage temperature or the preset cooling temperature.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments. It is to be understood that various changes and modifications may be made without departing from the scope of the appended claims.

10: compressor 20: water-cooled condenser
30: air-cooled condenser 40: electronic expansion valve
50: Evaporator
P1: first pressure sensor P2: second pressure sensor
S1: Branch engine
T1: Water-cooled condenser intake temperature sensor T2: Evaporator intake temperature sensor
T3: Outdoor temperature sensor
V1: first valve V2: second valve
C1: first check valve C2: second check valve

Claims (4)

A first step (S10) in which the gaseous refrigerant at a low temperature and low pressure is compressed by a compressor (10) into a high-temperature and high-pressure refrigerant;
The refrigerant discharged from the compressor 10 is transferred to the branch pipe S1 in which the first and second valves V1 and V2 are respectively installed and when cold water and hot water are simultaneously produced by the simultaneous operation of cold storage and storage, (S20) in which the ON / OFF control of the first and second valves (V1, V2) is performed and the moving direction of the refrigerant is controlled according to the case where only cold water is desired to be produced.
A third step (S30) in which the high-temperature and high-pressure refrigerant undergoes heat exchange with the water supply in the water-cooled condenser (20) when the refrigerant passes through the first valve (V1) and performs a heat storage function;
A fourth step (S40) in which the high-temperature and high-pressure refrigerant undergoes heat exchange with the outside air by the air-cooled condenser (30) when passing through the second valve (V2);
A fifth step (S50) in which the refrigerant passing through the water-cooled condenser (20) or the air-cooled condenser (30) is converted into a low-temperature low-pressure refrigerant through the electronic expansion valve (40);
A sixth step (S60) in which the low-temperature low-pressure refrigerant passing through the electronic expansion valve (40) is heat-exchanged with the water in the evaporator (50), and the refrigerant subjected to the cooling function and heat-exchanged is circulated to the compressor (10); Lt; / RTI >
The compressor 10, the water-cooled condenser 20, the air-cooled condenser 30, the electronic expansion valve 40, and the evaporator 50 are integrally formed in one case,
The cooling function of the sixth step S60 is necessarily driven, the heat storage function of the third step S30 is selectively driven,
When it is desired to produce cold water and hot water at the same time by simultaneous operation of axial cooling and thermal storage, the second valve V2 is turned off, the first valve V1 is kept in the ON state,
In the case where only cold water is to be produced by cold storage operation, by turning off the first valve (V1) and keeping only the second valve (V2) ON,
The compressor 10 can be selectively switched without stopping the compressor 10 at low compression ratios without using the four sides for simultaneous operation of the water-cooling type, the air-cooling type, or the cooling /
The temperature sensors T1 and T2 are provided on the water inlet side of the water-cooled condenser 20 and the evaporator 30. When the temperature of the temperature sensors T1 and T2 satisfies the preset storage temperature or the predetermined temperature The compressor 10 is stopped,
Allows the compressor 10 to be operated when the temperature of the temperature sensors T1 and T2 does not satisfy the preset storage temperature or the preset cooling temperature,
When the water-cooled condenser 20 and the air-cooled condenser 30 are selectively driven, check valves C1 and C2 are provided between the water-cooled condenser 20 and the air-cooled condenser 30 and the electronic expansion valve 40, The refrigerant flows only through the electronic expansion valve 40 so that the refrigerant does not flow in the reverse direction,
First and second pressure sensors P1 and P2 are provided on the front and rear ends of the compressor 10, respectively,
Temperature sensors T1 and T2 are provided on the water inlet side of the water-cooled condenser 20 and the evaporator 50,
The outdoor air temperature sensor T3 is provided on the side of the air-cooled condenser 30,
Characterized in that the water-cooled type, the air-cooled type, the simultaneous cooling / storage simultaneous operation, and the cooling and cooling independent operation are automatically switched according to the ratio of the preset high pressure and the preset low pressure, A Method for Controlling Multiple Heat Source Multi Heat Pump System with Simultaneous Heat and Storage Operation. delete delete delete

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