KR20180109449A - Heat pump system which can supply heat and chill - Google Patents

Abstract

The present invention relates to a heat pump system capable of maintaining a balance between a hot load and a cold load so that demands for heat and cold can be satisfied at the same time. The heat pump system includes a compressor, a plurality of condensers connected in parallel to be supplied with and condense a gas refrigerant compressed by the compressor; a plurality of expansion valves connected in parallel to be supplied with and expand a liquid refrigerant condensed by the condenser, a plurality of evaporators connected to each of the expansion valves to vaporize the expanded liquid refrigerant and then transfer the refrigerant to the compressor; a heat-chill heat pump including a core filter dryer installed between the plurality of evaporators and the compressor, a heat demand portion including a plurality of heat consumers for recovering heat energy from the plurality of condensers and using the energy, and a cold heat demand portion maintaining a cold temperature by transferring heat energy to the evaporators. An accumulator is installed between the core filter dryer and the compressor, a liquid receiver is provided between the plurality of condensers and the plurality of expansion valves, and a bypass pipe for directly connecting the outlet side of the receiver and the inlet side of the accumulator and a bypass module including an expansion valve and an on-off valve installed in the bypass pipe are provided to maintain a balance between the hot load and the cold load. As a result, the heat-chill heat pump system is capable of satisfying both heat and chill demands in summer and winter alike.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a heat pump system,

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a heat pump system, and more particularly, to a heat pump system capable of maintaining a balance between a heat load and a cold load so that the demand for heat and cold can be satisfied at the same time.

The heat pump is a device in which a power driven compressor compresses a gas refrigerant to send thermal energy of a low-temperature heat source to a high-temperature heat source to recover waste heat of the low-temperature heat source. Accordingly, the heat pump also functions to recover the waste heat and to remove heat from the space or material requiring low temperature through the heat recovery operation.

However, since the high temperature demand to be heated by the heat supply and the low temperature demand to maintain the low temperature are difficult to match with each other, the heat pump generally performs only one of the heating operation and the cooling operation.

Also, since high-temperature demand and low-temperature demand differ from season to season, even if any one of the heat pumps performs both heating and cooling, usually only the heating operation is performed during the winter season and only the cooling operation is performed during the summer season. Therefore, even though a heat pump designed to satisfy both high-temperature and low-temperature demands, heat supply and cooling can not be performed at the same time regardless of the winter season and the summer season.

For this reason, if a heat pump operates to perform only a cooling action during the summer season and operates only to perform a heating action during the winter season, in order to operate a refrigerator or a freezer requiring cooling action during the winter season or a drying room or a drying oven requiring a heating action during the summer season, Not only the equipment cost is increased because more heat pumps are required, and the power consumption for operating two or more heat pumps also increases by the number of heat pumps.

A related art related to the related art is a 'hot water waste heat recovering device' disclosed in the prior art Patent Publication No. 10-0686189 (registered on February 15, 2007) shown in FIG. 1.

The prior art is provided with a waste water collecting tank 100 connected to a waste water inlet pipe 102 through which used hot water is introduced and a waste water collecting tank 100 provided separately from the waste water collecting tank 100 and connected by a waste water supply pipe 202, And a waste water discharge pipe 204 connected to the waste water heat exchange tank 200. The waste heat recovering device is a hot water waste heat recovering device that is capable of recovering heat obtained through the heat exchanger 210 .

However, the waste heat recovery apparatus proposed in the prior art has the effect of providing the heat energy recovered from the wastewater and the effect of cooling the wastewater to some degree, but the heat There is a limitation that the load supply and demand configuration can not be presented.

Patent Registration No. 10-0686189 (Registered Date: Feb. 15, 2007)

Accordingly, the present invention has been made to solve the problems of the prior art, and it is an object of the present invention to provide a system and a method for the same, in which not only the heat demand and the cold heat demand separated from each other can be satisfied simultaneously in one cycle, Temperature heat pump system.

To achieve these and other advantages and in accordance with the purpose of the present invention, as embodied and broadly described, the present invention provides a cold-heat and heat pump system including a compressor for compressing gas refrigerant, a plurality of condensers connected in parallel for supplying and condensing the gas refrigerant compressed in the compressor, A plurality of evaporators connected to each of the expansion valves to vaporize the expanded liquid refrigerant and then transfer the refrigerant to the compressor again; and a plurality of evaporators connected between the plurality of evaporators and the compressor, And a plurality of heat demanders for recovering heat energy from the plurality of condensers, and a cooler for transferring heat energy to the plurality of evaporators, The core filter dryer, A bypass pipe provided with an accumulator between the condensers and provided with a receiver between the plurality of condensers and the plurality of expansion valves and directly connecting the outlet side of the receiver with the inlet side of the accumulator, A bypass module including a valve and an on-off valve is provided so that when a heat load is increased over a cold load in the winter season, a part of the refrigerant circulates without passing through the evaporator, whereby a balance between the heat load and the cold load is maintained, The heat demand and the cold heat demand are all satisfied.

In this case, preferably, a dual pressure sensor in which the refrigerant pressure flowing from the accumulator to the condenser and the pressure of the refrigerant flowing from the plurality of condensers to the plurality of expansion valves are simultaneously measured, and a temperature sensor for measuring the temperature of the refrigerant discharged from the compressor The refrigerant stored in the receiver may be additionally extracted according to the pressure value of the dual pressure sensor and the temperature of the temperature sensor, or a part of the refrigerant circulating in the heat pump may be stored in the receiver.

In this case, preferably, the temperature sensor and the on-off valve are interlocked to increase the amount of refrigerant entering the accumulator when the temperature measured by the temperature sensor is smaller than a predetermined value, And the temperature is increased.

The heat pump system according to the present invention comprises a compressor for compressing a gas refrigerant, a plurality of condensers connected in parallel for supplying and condensing the gas refrigerant compressed in the compressor, and a condenser for condensing the condensed liquid refrigerant, A plurality of evaporators connected to each of the expansion valves to vaporize the expanded liquid refrigerant and then transfer the refrigerant to the compressor, and a core filter drier installed between the plurality of evaporators and the compressor, And a low-temperature water tank installed in the groundwater tank. The high-temperature water tank supplies heat energy from one of the condensers to the groundwater tank, The low-temperature water tank is heated by the groundwater The hot water in the high-temperature water tank and the low-temperature water temperature in the low-temperature water tank are maintained for a long time, thereby providing cold water for hot water and cold water production And a refrigerator which receives cold heat from one of the evaporators, and a freezer which receives cold heat from one of the evaporators, wherein the refrigerator comprises: An accumulator is provided between the filter drier and the compressor, a bypass pipe is provided between the plurality of condensers and the plurality of expansion valves, the bypass pipe directly connecting the outlet side of the receiver with the inlet side of the accumulator, A bypass module including an expansion valve and an on-off valve is installed When the heat load is increased from the cold load in the winter season, a part of the refrigerant is circulated without passing through the evaporator, so that the balance between the heat load and the cooling load is maintained, thereby satisfying both the heat demand and the cold demand .

Preferably, a dual pressure sensor in which the refrigerant pressure flowing from the accumulator to the condenser and the pressure of the refrigerant flowing from the plurality of condensers to the plurality of expansion valves are simultaneously measured, and a temperature sensor for measuring the temperature of the refrigerant discharged from the compressor , The refrigerant stored in the receiver is additionally extracted according to the pressure value of the dual pressure sensor and the temperature value of the temperature sensor, or a part of the refrigerant circulating in the heat pump is stored in the receiver.

In this case, preferably, the temperature sensor and the on-off valve are interlocked to increase the amount of refrigerant entering the accumulator as the on-off valve is opened when the temperature measured by the temperature sensor is smaller than a predetermined value. Pressure and temperature are increased.

Preferably, the high-temperature water tank is connected to the high-temperature water tank to transmit and store the hot water in the high-temperature water tank, or to deliver the stored hot water to the hot water tank. Wherein one of the evaporators receives the high temperature water in the hot water tank during the summer season and then the cooled high temperature water is transferred to the inside of the groundwater tank constituting the triple water tank, And the supply of cold heat load can be performed.

According to the cold / hot simultaneous heat pump system according to the present invention, one heat pump can simultaneously satisfy the demand for hot water and the demand for cold water. In addition, one heat pump is used as it is regardless of seasonal changes, Since both the heat and cold heat demands are satisfied, there is no need to use two heat pumps, thereby maximizing the efficiency, drastically reducing the equipment cost, and drastically reducing the required power.

1 is a block diagram showing a conventional technique,
2 is a conceptual view of a heat pump system according to the present invention,
Fig. 3 is a configuration diagram specifically showing Fig. 2,
4 is a conceptual view of a heat pump system according to a further embodiment;
5 is a temperature-entropy graph showing the refrigerant circulation of the heat pump,
6 is a pressure-enthalpy graph showing the refrigerant circulation of the heat pump,

The specific structure or functional description presented in the embodiment of the present invention is merely illustrative for the purpose of illustrating an embodiment according to the concept of the present invention, and embodiments according to the concept of the present invention can be implemented in various forms. And should not be construed as limited to the embodiments described herein, but should be understood to include all modifications, equivalents, and alternatives falling within the spirit and scope of the invention.

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

The heat pump system according to the present invention is characterized in that a single heat pump is provided with a load adjusting means capable of satisfying the demand for hot water and the demand for cold water regardless of the seasonal change.

The heat pump system according to the present invention can be implemented in the first and second embodiments shown below. Hereinafter, a first embodiment will be described with reference to FIG. 2 and FIG. 3, and a second embodiment will be described with reference to FIG.

≪ Embodiment 1 >

In the first embodiment, the heat pump system according to the present invention includes a cold / hot heat pump 10, a hot water demand unit 20, and a cold / hot water demand unit 40.

As shown in FIGS. 2 and 3, the cold / hot simultaneous heat pump 10 includes a compressor 11 for compressing gas refrigerant, a plurality of condensers (not shown) connected in parallel for supplying and condensing the gas refrigerant compressed in the compressor 11 A plurality of expansion valves 13 connected in parallel for supplying and expanding the liquid refrigerant condensed by the plurality of condensers 21; and a plurality of expansion valves 13 connected to the respective expansion valves to vaporize the expanded liquid refrigerant, A plurality of evaporators 14 for transferring the refrigerant to the evaporator 14 and a core filter dryer 16 installed between the evaporators 14 and the compressor 11.

The heat demand section 20 refers to a drying chamber 21 and a hot water tank 22 to receive thermal energy from the respective condensers of the plurality of condensers 12 as shown in FIG. In this case, the condenser connected to the drying chamber is referred to as a first condenser 121, and the condenser connected to the hot water tank 22 is referred to as a second condenser 122. The other condenser is referred to as a third condenser 123 and the heat demand part for receiving thermal energy from the third condenser 123 is not shown but may be a facility requiring thermal energy such as a drying furnace or an evaporator of a generator.

The cold / hot water demand unit 40 is a facility in which a low temperature is maintained while the heat energy is lost to the plurality of evaporators 14. More specifically, it is a refrigeration storage 41, a freezer 42, and a cold water tank 43. At this time, the evaporator connected to the cold storage 41 is referred to as a first evaporator 141, the evaporator connected to the freezer 42 is referred to as a second evaporator 142 and the evaporator connected to the cold water tank 43 is referred to as a third evaporator And is referred to as an evaporator 143. Water supplied to the cold water tank 43 is supplied from the groundwater tank 45 and water supplied from the groundwater tank 45 is cooled while passing through the third evaporator 143 and is transferred to the cold water tank 43. The remaining one evaporator is referred to as a fourth evaporator 144 and the cold and hot water demand portion connected to the fourth evaporator 144 may be an additional freezer or a refrigerated warehouse (not shown) .

The accumulator (17), the receiver (18), and the bypass module (15) are installed in the cold / hot heat pump. The accumulator 17 is installed between the core filter drier 16 and the compressor 11 as shown in Figs. The accumulator 17 separates the refrigerant into a liquid and a gas when the liquid refrigerant that has not evaporated yet is contained in the refrigerant entering the compressor 11, passes only the gas refrigerant through the compressor 11, It is a container in the form of a tank to store.

The receiver (18) is a container which is provided between the plurality of condensers (12) and the plurality of expansion valves (13) to temporarily store the high temperature and high pressure refrigerant liquid liquefied in the plurality of condensers (12) 14 to absorb the change in the refrigerant amount due to the load variation within the refrigerant circuit.

The bypass module 15 includes a bypass pipe 151 for directly connecting the outlet side of the receiver 18 and the inlet side of the accumulator 17 and an expansion valve An expansion valve 152) and an opening / closing valve 154. When the opening / closing valve 154 is opened, a part of the refrigerant discharged from the plurality of condensers 12 and delivered to the plurality of expansion valves 13 is regulated in accordance with the opening degree of the opening / closing valve 154, Passes through the bypass pipe 151 without passing through the valve 13, and enters the accumulator 17 immediately.

By installing the bypass module 15, firstly, when the load of the plurality of condensers 12 becomes large, especially when the heating or hot water consumption increases during the winter season, if a part of the plurality of evaporators 14 is not operated in the winter season, The refrigerant passes through the accumulator 17 directly to the compressor 11 as it is moved along the bypass pipe 151 without passing through the plurality of evaporators 14 and the supply and discharge of the heat load and the cold load can be controlled. At this time, since the expansion valve (the fifth expansion valve 152) is provided in the bypass pipe 151, the refrigerant evaporates to a certain extent to become a gaseous state. However, since the refrigerant in the liquid state is still mixed, Only the refrigerant in the gaseous state is sent to the compressor 11 and the refrigerant in the liquid state enters the plurality of condensers 12 directly along the liquid refrigerant bypass pipe 19. [ Therefore, only the bypass module 15 and the accumulator 17 are used to adjust the supply and demand of the load.

Secondly, the bypass module 15 can be operated in a larger amount through the interaction with the receiver 18. The bypass module 15 only discharges the refrigerant stored in the receiver 18 and transfers some of the refrigerant among the refrigerant to the compressor 11 through the bypass pipe 151 when there is a limit in the load control in the surge of thermal protection in the winter season , It is possible to increase the amount of refrigerant as the demand for heat increases, and in the meantime, it becomes possible to satisfy the amount of cold demand required by the small amount demanded in the winter season. That is, the increase of the heat demand in the winter season can be satisfied without affecting the cold load.

The points indicated by A, B, C, D1, D2, D3 and D4 in FIG. 2 correspond to A, B, C and D shown in the graphs of FIG. 5 and FIG. In the graphs of FIGS. 5 and 6, it is assumed that the evaporator is not one but a plurality, and the points D1, D2, D3 and D4 in FIGS. 2 and 3 are denoted by D in FIG. 5 and FIG.

In this case, while the heat load is increased as in the winter season, the plurality of evaporators 14 are arranged in such a manner that the refrigerant entering the compressor 11 due to the ambient temperature drop becomes lower than the pressure P2 in FIG. 5 or the refrigerant discharged from the plurality of condensers 12 When the pressure is lower than P1, the output of the compressor 11 is increased to compress the refrigerant to a higher pressure so that the refrigerant pressure discharged from the compressor 11 can be controlled to be P1.

In order to smoothly control the refrigerant pressure using the compressor 11, the refrigerant pressure needs to be measured in real time. Therefore, as shown in FIG. 2, a dual pressure sensor 31 for simultaneously measuring pressures at points A and C is provided. For reference, the pressure P2 shown in Figs. 5 and 6 is the pressure at the point A and P1 is the pressure at the point C.

In order to control the amount of refrigerant entering the plurality of condensers 12 after passing through the compressor 11 directly through the bypass pipe 151 without passing through the plurality of evaporators 14, An interlock controller 153 for automatically controlling the degree of opening and closing of the opening and closing valve 154 provided in the bypass pipe 151 is provided according to the measured value of the temperature sensor 32 .

The temperature of the gas refrigerant discharged from the compressor 11 is the temperature at the point indicated by B in Fig. 5 and Fig. Especially in the winter season, when the refrigerant heat load is lowered due to the low ambient temperature, the temperature and pressure are lowered together. When these phenomena accumulate, the pressure of the circulating refrigerant continues to be lowered, and as a result, the efficiency of the refrigerant decreases as the discharge heat amount decreases in the graph of FIG. In this case, it is necessary to supply additional refrigerant to raise the temperature of the refrigerant by increasing the pressure of the refrigerant. Therefore, it is necessary to send the additional refrigerant to the compressor 11 directly without passing through the plurality of evaporators 14 while further discharging the refrigerant from the receiver 18 and maintaining the heat load of the refrigerant.

Therefore, when the temperature at the point B is lowered, the additional refrigerant is automatically discharged from the receiver 18, and if the temperature is lowered, the opening / closing valve 154 is opened to open more, so that the thermal efficiency can be prevented from lowering in the winter season .

≪ Embodiment 2 >

In the second embodiment, the configurations of the cold / hot heat pump 10, the bypass module 15, the dual pressure sensor 31 and the temperature sensor 32 provided in the cold / hot heat pump 10 are both the first The description thereof will be omitted.

The second embodiment differs from the first embodiment in that the hot water tank 22 and the cold water tank 43 are provided separately from each other, but the hot water tank and the cold water tank are connected to one groundwater tank 51, As shown in FIG. At this time, in the second embodiment, the hot water tank and the cold water tank in the first embodiment will be referred to as a hot water tank 52 and a low-temperature water tank 53, respectively.

The high temperature water tank 52 and the low temperature water tank 53 are heated or cooled by the second condenser 122 and the third evaporator 143 respectively but the high temperature water tank 52 and the low temperature water tank 53 are brought into contact with the outside atmosphere When installed, the hot water tank 52 is cooled by the influence of the cold air in the winter season, and in the summer, the temperature of the low temperature water tank 53 is raised by the influence of the hot outside air.

Therefore, in order to prevent such a phenomenon, a groundwater tank 51 is buried in the lower part of the ground, and a high-temperature water tank 52 and a low-temperature water tank 53 are installed to be submerged in the groundwater tank 51. In this case, not only the temperature effect due to the seasonal change is significantly reduced at the point of being buried in the ground, but also the temperature of the high temperature water tank 52 and the temperature of the low temperature water tank 53 Can be kept constant for a long time. At this time, the groundwater in the groundwater tank 51 may be groundwater salvaged from the groundwater source S as shown in FIG. 4, or rainwater collected in the stormwater tank R.

Particularly, in the present invention, the high-temperature water tank 52 is disposed at the upper portion and the low-temperature water tank 53 is disposed at the lower portion, so that groundwater having a relatively high temperature is gathered around the hot water tank 52 due to the thermal flow inside the groundwater tank 51 The low-temperature groundwater collects around the low-temperature water tank 53, and the temperature of the high-temperature water tank 52 and the low-temperature water tank 53 can be maintained for a longer time.

At this time, the bottom surface of the hot water tank 52 and the top surface of the low temperature water tank 53 are connected to each other by the uprising pipe 54 as shown in FIG. The uprising pipe 54 is connected to the water supply pipe 54 so that the water temperature of the upper portion of the low temperature water tank 53 is lower than the water temperature of the low temperature water sinking below the high temperature water tank 52, The water above the low temperature water tank 53 rises to the high temperature water tank 52 so that the relative temperature difference between the high temperature water tank 52 and the low temperature water tank 53 can be maintained for a longer time. This phenomenon occurs when water in the low-temperature water tank 53 passes through a direct air-conditioning unit (not shown) installed in a neighborhood or other room where cooling is required to meet the cooling demand during the summer, The process of returning may be repeated.

The high-temperature water tank 52 and the low-temperature water tank 53 can also be used as hot and cold water sources, respectively, so that supplementation may be required. At this time, a hot water tank replenishment valve 55 and a cold water tank replenishment valve 56 are installed in the high temperature water tank 52 and the low temperature water tank 53, respectively, so that water can be replenished from the surrounding ground water. In this case, a foreign matter removing filter may be installed in the hot water tank refill valve 55 and the cold water tank refill valve 56 so that foreign matter in the ground water can be filtered.

The second condenser 122 maintains the water inside the high temperature water tank 52 at a high temperature and the third evaporator 143 maintains the water inside the low temperature water tank 53 at a low temperature as shown in FIG. I will. In this case, the hot water tank 152 provides hot water in the winter season or provides air to the air conditioner (not shown), and the low temperature water tank 53 provides cold water in the summer season, Provides cooling.

However, hot water and heating may be required in large quantities during the winter season, so that an additional hot water supply means is required. In this case, when the groundwater is introduced through the hot water tank replenishment valve 55 in order to consume a large amount of hot water, the groundwater temperature in the winter season is low, so that it may take considerable time to operate only the second condenser 122. Therefore, instead of replenishing the ground water with the hot water tank replenishment valve 55, the third condenser 123 warms the ground water and immediately flows the warmed ground water into the hot water tank 52, whereby the hot water tank 52, And the water temperature of the hot water tank 52 can be kept high enough to be used as hot water.

On the other hand, in case of using only the high-temperature water tank 52 as the heat source for the winter season hot water and the heating in the second embodiment, in case that the hot water and the heating demand can not be satisfied due to the capacity limit of the hot water tank 52, A solar heat recovery unit 60 including a solar collector 61 and a solar collector 62 may be provided.

The hot water tank 61 basically stores the water heated by the solar collector 62 and supplies hot water and heating to the respective consumers with the stored water. 4, when the high temperature water stored in the high temperature water tank 61 is satisfied after the hot water and the heating demand are satisfied, the high temperature water tank 61 is provided in the high temperature water tank 61, And the high temperature water tank 52 are connected to the high temperature water supply pipe 63 and the high temperature water recovery pipe 64.

When the heating and hot water demand is satisfied only in the hot water tank 52 in the winter season, since the second condenser 122 and the third condenser 123 are fully operated as described above, the evaporator can also respond thereto So that the entire heat pump system can be fully operated by evaporating the same amount of refrigerant as the condenser.

In the winter season, however, only the first evaporator 141 and the second evaporator 142 are operated only for the refrigerator 41 and the freezer 42, which are not required for cooling and are required to be operated during the winter season and the summer, The first evaporator 143 and the fourth evaporator 144 need not be operated. However, even in such a situation, the evaporator must be operated so as to correspond to the capacities of the first to third condensers 121, 122 and 123.

In this case, if the hot water in the hot water tank 61 heated by the sun is cooled to room temperature by the fourth evaporator 144 and the hot water is moved into the underground water tank 51, The operation of the first to third condensers 121, 122 and 123 can be controlled by the operation of the first, second and fourth evaporators 141, 142 and 144 So that the drying room 21 used for all four seasons can be normally operated while meeting hot water and heating demand. In this case, when the high temperature water tank 52 conveys heat energy to the fourth evaporator 144 and the temperature is lowered to room temperature, the 'normal temperature' is about 15 degrees Celsius to 20 degrees Celsius It refers to the postwar period, not the subzero temperature, which is the normal temperature in winter.

The second embodiment of the cold / hot heat pump system according to the present invention is configured as described above, so that one heat pump can satisfy both cold and hot heat demands, and simultaneous satisfying of the cold and hot heat demands can be performed both in the winter season and the summer season Lt; / RTI >

However, the present invention is not limited to the first and second embodiments. In the case where the known technology is added to the common technical features of the first and second embodiments, And there is no limit to the form.

It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit or scope of the inventions. It will be apparent to those of ordinary skill in the art.

R: Excellent tank S: Underground water source
10: simultaneous cold and hot heat pump 11: compressor
12: a plurality of condensers 13: a plurality of expansion valves
14: plurality of evaporators 15: bypass module
16: Core filter dryer 17: Accumulator
18: Receiver unit 19: Liquid refrigerant bypass pipe
20: Heating and Demand Department 21: Drying Room
22: hot water tank 30:
31: Dual pressure sensor 32: Temperature sensor
40: cold / hot demand part 41: cold storage warehouse
42: Freezer 43: Cold water tank
45: ground water tank 50: triple water tank
51: Groundwater tank 52: High temperature water tank
53: low temperature water tank 54: rising pipe
55: Hot water tank replenishment valve 56: Cold water tank replenishment valve
60: solar heat recovery unit 61: high temperature water tank
62: solar collector 63: high temperature water supply pipe
64: high temperature water recovery pipe 121: first condenser
122: second condenser 123: third condenser
131: first expansion valve 132: second expansion valve
133: third expansion valve 134: fourth expansion valve
141: first evaporator 142: second evaporator
143: Third evaporator 144: Fourth evaporator
151: bypass pipe 152: fifth expansion valve
153: interlock controller 154: opening / closing valve

Claims (8)

A plurality of expansion valves connected in parallel for expanding and expanding the liquid refrigerant condensed by the condenser; and a plurality of expansion valves connected in parallel to each other for expanding and expanding the liquid refrigerant condensed by the condenser, A plurality of evaporators connected to the plurality of evaporators to vaporize the expanded liquid refrigerant and then transfer the refrigerant to the compressor, and a core filter drier installed between the plurality of evaporators and the compressor;
A heat demand unit configured by a plurality of heat demanders for recovering heat energy from the plurality of condensers; And
And a cold / hot water supply unit for supplying cold energy to the plurality of evaporators,
An accumulator is provided between the core filter drier and the compressor, a bypass pipe is provided between the plurality of condensers and the plurality of expansion valves, the bypass pipe directly connecting the outlet side of the receiver with the inlet side of the accumulator, A bypass module comprising an expansion valve and an on-off valve installed in the pipe,
When the heat load is increased over the cold load in the winter season, a part of the refrigerant circulates without passing through the evaporator, so that the balance between the heat load and the cold load can be maintained to satisfy both the heat demand and the cold demand Features cold and hot heat pump system. The method according to claim 1,
A dual pressure sensor in which the pressure of the refrigerant flowing from the accumulator to the compressor and the pressure of the refrigerant flowing from the receiver to the plurality of expansion valves are measured at the same time and the pressure of the refrigerant flowing into the compressor is lower than the saturated vapor pressure, Wherein the compressor output is further increased when the saturated liquid pressure is less than the saturated liquid pressure. The method according to claim 1,
A temperature sensor for measuring the temperature of the refrigerant discharged from the compressor is installed to be interlocked with an on-off valve installed in the bypass module. When the temperature value measured by the temperature sensor is lower than the saturation steam temperature, Features cold and hot heat pump system. A plurality of expansion valves connected in parallel for expanding and expanding the liquid refrigerant condensed by the condenser; and a plurality of expansion valves connected in parallel to each other for expanding and expanding the liquid refrigerant condensed by the condenser, A plurality of evaporators connected to the plurality of evaporators to vaporize the expanded liquid refrigerant and then transfer the refrigerant to the compressor, and a core filter drier installed between the plurality of evaporators and the compressor;
A high-temperature water tank installed in a ground water tank, and a low-temperature water tank installed in a groundwater tank, wherein the high-temperature water tank is heated by receiving heat energy from one of the condensers, and the low- Wherein the high temperature water in the high temperature water tank and the low temperature water temperature in the low temperature water tank are maintained for a long time to provide cold water for hot water and cold water production;
A drying chamber for receiving thermal energy from one of the condensers;
A refrigerator for receiving cold heat from one of the evaporators; And
A freezer for receiving cold heat from one of the evaporators; Lt; / RTI >
An accumulator is provided between the core filter drier and the compressor, a bypass pipe is provided between the plurality of condensers and the plurality of expansion valves, the bypass pipe directly connecting the outlet side of the receiver with the inlet side of the accumulator, A bypass module comprising an expansion valve and an on-off valve installed in the pipe,
In the winter season, when the heat load is increased over the cold load, a part of the refrigerant circulates without passing through the evaporator, so that the balance between the heat load and the cooling load is maintained to satisfy both the hot water demand and the cold water demand Features cold and hot heat pump system. 5. The method of claim 4,
One of the condensers heats water in the groundwater tank and transfers it directly to the inside of the hot water tank. When the flow rate of the hot water tank is lowered due to an increase in hot water usage in the winter season, hot water heated in the hot water tank is supplied to supplement both heat and flow Wherein the heat pump system comprises: 5. The method of claim 4,
A dual pressure sensor is provided in which the pressure of the refrigerant flowing from the accumulator to the compressor and the pressure of the refrigerant flowing from the receiver to the plurality of expansion valves are simultaneously measured so that the refrigerant pressure flowing into the compressor becomes lower than the saturated steam pressure, Wherein the compressor output is further increased when the saturated liquid pressure is less than the saturated liquid pressure. The method according to claim 6,
A temperature sensor for measuring the temperature of the refrigerant discharged from the compressor is installed to be interlocked with an on-off valve installed in the bypass module. When the temperature value measured by the temperature sensor is lower than the saturation steam temperature, Features cold and hot heat pump system. 5. The method of claim 4,
A high temperature water tank connected to the high temperature water tank for transferring and storing the hot water in the high temperature water tank or delivering the stored high temperature water to the high temperature water tank and a solar heat recovery unit including a solar heat collector for heating the high temperature water inside the hot water tank with solar heat In addition,
One of the evaporators receives the water in the hot water tank in the summer, and after cooling it to room temperature, transfers it to the inside of the groundwater tank constituting the triple water tank. Thus, when the operation rate of the condenser is maximized during the winter season, And the groundwater temperature of the groundwater tank is kept at room temperature without being influenced by the winter environment, thereby increasing the heat supply efficiency in the winter season.

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