KR20010088744A - Cooling and heating system using the wasting heat - Google Patents

Abstract

The present invention relates to a cooling and heating system having a heating cycle and a cooling cycle, comprising: a water circulation heat pump unit; A compressor installed inside the water circulation heat pump unit and compressing a refrigerant gas at a high temperature and a high pressure; A high temperature side heat exchanger for recovering high temperature heat while exchanging the compressed refrigerant with water and condensing the refrigerant; A low temperature side heat exchanger which evaporates when the condensed refrigerant is introduced through the expansion valve and exchanges heat with water to obtain low temperature heat; It characterized in that it comprises a four-sided to change the flow direction of the refrigerant for reverse cycle operation of the heat pump for cooling and heating in the summer and winter. As a result, by providing a cooling and heating heat exchange system for effectively exchanging water including groundwater, running water, and natural water, energy costs can be reduced, and the cost of dual facilities that have been included in conventional heating and cooling systems can be saved. In particular, by using water as a heat source, it does not destroy nature and does not cause pollution. Water used for cooling and heating is recycled and reused to save water resources, and to use high-temperature and low-temperature energy that have been previously discarded. There is provided a cooling and heating system utilizing available waste heat.

Description

Cooling and heating system using waste heat {COOLING AND HEATING SYSTEM USING THE WASTING HEAT}

The present invention relates to a water circulation type heat pump cooling and heating system, and more particularly to a cooling and heating system using waste heat.

More specifically, the high temperature side heat exchanger (condenser) which obtains high temperature water of 65-70 degreeC by heat-exchanging the high temperature refrigerant gas discharged from a compressor with water circulated, and the refrigerant gas which evaporates to low temperature through an expansion valve. Water and circulated water are exchanged with each other by storing the hot and cold water obtained from the heat exchange unit consisting of a low temperature side heat exchanger (evaporator) to obtain cold water at 7 to 10 ° C in separate storage tanks and connecting them to heating and cooling systems. The present invention relates to a cooling / heating system using waste heat, which can be supplied as hot water and cold water used as water, and in particular, it can recover effectively as much as possible without storing high and low temperature heat generated by a heat pump in water.

In general, in the air-cooled heat pump system of FIG. 1, in the case of cooling, high-temperature refrigerant gas discharged from the compressor 141 is exchanged with air (aka outdoor unit: condenser 122) to release high-temperature heat to the atmosphere and expand the expansion valve ( 148) through the heat exchange (refer to the indoor unit: evaporator 123) with the refrigerant gas evaporated to a low temperature to obtain the desired cooling effect, in the case of heating the refrigerant gas evaporated to a low temperature in the cold atmosphere air and heat By exchanging (also called outdoor unit: in this case, evaporator 122) to discharge low-temperature heat into the atmosphere, and the high-temperature refrigerant gas discharged from the compressor 141 exchanges heat with air (aka indoor unit: condenser 123 in this case). To obtain the desired heating effect.

However, on the other hand, in the air-cooled heat pump system of FIG. 1, there is an energy waste of discharging all the heat of the high temperature in the air during cooling and the low temperature of the heat in the heating. In this case, a separate auxiliary heat source is required due to the rapid deterioration of efficiency, and a heat source device for protecting its own system is required.

In the water-cooled heat pump system of FIG. 2, in the case of cooling, high-temperature refrigerant gas discharged from the compressor 141 is exchanged with water (aka outdoor unit: water-cooled condenser 124) to cool the heat through the cooling tower 126. The refrigerant gas released into the atmosphere, passing through the expansion valve 148 and evaporated to low temperature is exchanged with air (aka indoor unit: evaporator 123) to obtain a desired cooling effect, and in the case of heating, refrigerant gas evaporated to low temperature. Heat exchange with heat (so-called outdoor unit: at this time evaporator 124) to release the low-temperature heat in the cooling water, and the high-temperature refrigerant gas discharged from the compressor 141 exchanges heat with air (aka indoor unit: at this time condenser) (123) To achieve the desired heating effect.

In addition, as shown in FIG. 1, even in the water-cooled heat pump system of FIG. 2, there is an energy waste of dissipating all the heat of the high temperature in the air during cooling and the low temperature of the heat in the heating. When the temperature is less than or equal to the temperature, the efficiency is drastically deteriorated, so a heat source device for protecting the system has a disadvantage.

As described above, as described in the methods of FIGS. 1 and 2, all of the precious energy generated from either one is unconditionally emitted during high temperature during cooling and low temperature during heating, and in particular, during heating. When the temperature drops below -5 ℃, the efficiency is sharply lowered and the heating efficiency is also drastically reduced, so that the insufficient amount of heat must be heated by using an auxiliary heating device (using an electric heater or gas and oil) 125, There was an energy waste such as an auxiliary heating device (electric heater, etc.) 125 attached to prevent the freezing of the evaporator 122 (referred to as an outdoor unit: a condenser during cooling) 122 exposed to the refrigerant gas and the cold atmosphere.

With this in mind, the water-cooled heat pump system of FIG. 2 is used as an antifreeze and indirect refrigerant for preventing freezing during winter temperature drops by circulating brine or the like instead of water in the water-cooled condenser 124 in some improved manner. However, when cooling, high temperature heat is emitted during heating, and low temperature heat is released in the brine, and when leaking or replacing brine, there is a waste end that may affect the environment by polluting water quality.

Therefore, the present invention has been invented to solve the above-mentioned problems of the prior art, the object of the present invention, it is possible to perform the cooling or heating in one system, the operation is simple and convenient, and the cooling and heating performance The present invention provides a cooling / heating system using waste heat, which can further increase and remarkably reduce power and fuel consumption by recovering and using precious high-temperature and low-temperature precious energy resources.

The cooling and heating system according to the present invention for achieving the above object includes a heating means for heating water in a high temperature side heat exchanger (water cooling condenser) and a cooling means for cooling water in a low temperature side heat exchanger (water cooling evaporator). The heat exchanger on the hot side and the low temperature side is circulated and connected to separate water tanks, and the accumulated heat is circulated to the room or the target of the energy required, so that the heat exchanger can be It includes cooling and heating circulation pipes for cooling and heating, and supply pipes for use with high quality hot and cold water.

Therefore, in the present invention, the heat exchanged hot water and cold water according to the operation of the refrigeration cycle in one system in a separate tank to store the heat, if necessary, circulates the water accumulated in the heat anytime to cool in summer and winter ㆍ The system is capable of heating, and it is convenient to get the cold water and hot water needed at any time of the year, and also the floor heating (cooling if necessary) that Koreans prefer as our own heating means. By using the stored water, the cooling and heating performance is further improved, and the power and fuel consumption can be expected to be significantly reduced as the operation is avoided during high power consumption.

1 is a schematic view showing a conventional air-cooled heat pump system,

2 is a schematic view showing a conventional water-cooled heat pump system;

3 is an overall schematic view showing a cooling / heating system according to the present invention;

Figure 4 is a general plan view showing a cooling and heating system according to the present invention.

Explanation of symbols on the main parts of the drawings

40: heat pump unit 41: heat pump (compressor)

42: high temperature side heat exchanger (water-cooled condenser) 43: low temperature side heat exchanger

44: hot water storage tank 45: cold water storage tank

46: circulating pump 47: four sides

48: expansion valve 49: dryer

Hereinafter, preferred embodiments of the present invention will be described in more detail with reference to the accompanying drawings. 3 is an overall schematic view showing a cooling and heating system according to the present invention, Figure 4 is a general plan view showing a cooling and heating system according to the present invention.

As can be seen in these figures, the present invention is a system in which the water circulation heat pump unit 40 and the hot water tank 44 and the cold water tank 45 are paired with a heat exchanger (heat radiator) for cooling and heating. It includes a cooling and heating circulation system for the furnace, and a water supply system for supplying hot water and cold water.

In the cooling and heating system of the present invention, the water circulation heat pump unit 40 includes a compressor 41 for compressing a refrigerant gas at a high temperature and a high pressure, and recovers high temperature heat while exchanging the compressed refrigerant with water. , A high temperature side heat exchanger (42) for condensing the refrigerant, a low temperature side heat exchanger (43), in which the condensed refrigerant is introduced through the expansion valve (48) and evaporated by heat exchange with water to obtain low temperature heat, and summer And a four-way side 47 for changing the flow direction of the refrigerant for reverse cycle operation of the heat pump for cooling and heating in winter.

The cooling / heating system is a means for heating and supplying hot water in the water circulation heat pump unit 40. The high-temperature side heat exchanger 42 supplies hot refrigerant gas discharged from the compressor and water at room temperature to the circulation pump 46. While being circulated by the water, the high temperature heat is continuously exchanged and absorbed by the water and stored in the hot water tank 44. The heat is circulated through an indoor heat exchanger (heat radiator) such as a floor or fan coil (not shown), and the heating is performed separately. The clean hot water includes a normal cooling / heating circulation pipe and a water supply pipe which are supplied to household water, and the symbol 49 denotes a dryer.

On the other hand, the cooling and heating system according to the present invention is a means for cooling and supplying the cold water in the water circulation heat pump unit 40, the low-temperature side heat exchanger 43 passes through the high-temperature side heat exchanger 42, the expansion valve 48 The low temperature refrigerant gas and the water at room temperature are circulated by the circulating pump 46, and the low temperature heat is continuously exchanged with the water and stored in the cold water tank 45. Cooling while being circulated in the indoor heat exchanger (heat radiator), clean cold water separately stored includes a cooling and heating circulation pipe and a water supply pipe (installed in a conventional heating and heating system) to be supplied to domestic water.

All of these systems have a control panel (not shown) equipped with cooling and heating selection switches, automatic and manual selection switches, hot and cold water temperature setting switches, and room control switches for remote control. By attaching a temperature sensor that can be set arbitrarily to a room or machine room as in the prior art, an arbitrary temperature can be set to two values in the range of 7 to 70 ° C., so that the temperature selection range is very wide.

Accordingly, the temperature of the cooling, heating, and cooling and hot water is automatically maintained according to a preset temperature value.

According to the present invention, the water circulation heat pump unit 40 starts to operate when the power is turned on after designating various selection switches and set temperature values, and at the same time, the unit 40 and the storage tanks 44 and 45 of the designated machines are operated. The circulation pump 46, which is connected and attached thereto, is operated and passes through the heat exchangers of the high-temperature side 42 and the low-temperature side 43 in the unit 40, and exchanges the heat-exchanged water at high and low temperatures with the respective storage tanks 44. )) (45).

The stored water passes through heat exchanger (heat radiator) installed in each room such as floor and fan coil (not shown) through cooling / heating circulation pipe and cools and heats it. It is supplied through a supply pipe and used.

In particular, the temperature control is operated to the temperature value of the hot water tank 44 when heating and the temperature value of the cold water tank 45 when cooling according to the already set temperature value so that the temperature detected by the temperature sensor is set to the set temperature value. In this case, the unit 40 of the present invention automatically stops operation, and the unit 40 operates according to a separate dual temperature value, and the unit 40 operates and stops repeatedly. Easy to control

By the above automatic operation, it is possible to maintain the amount of heat and temperature to be obtained by any set temperature value, so that stable and efficient cooling and heating can be obtained, and hot and cold water can be obtained. By recovering and reusing valuable energy, the operating time of the system can be shortened, which greatly reduces power and fuel consumption, thereby reducing energy costs. Also, by recovering and using waste energy, this also reduces energy costs and environmental protection. Economical and high efficiency can be obtained.

As described above, according to the present invention, by operating a refrigeration cycle by operating a compressor in one system, hot water of high temperature (65-70 ° C.) can be obtained and used for heating and hot water, and at the same time cold water (7-10 of low temperature). ℃) is a system that can be used for cooling and cold water has the advantage that can be installed and operated regardless of the season without installing and using separate cooling and heat equipment such as boiler or air conditioner.

In addition, according to the present invention, the heat pump system is a revolutionary waste heat recovery system that can use all the energy that has been discarded in the past as it is, and the auxiliary heating device used in the prior art due to the rapid decrease in efficiency during winter heating is unnecessary. It became.

Therefore, according to the present invention, a significant reduction in energy costs, such as power and fuel, and a reduction in installation cost, which can be installed by simply connecting the system of the present invention to an existing pipe even in a conventional cooling and heating facility. The cooling and heating system using waste heat which can be installed irrespective of installation area and place is provided.

Claims (3)

In a cooling and heating system having a heating cycle and a cooling cycle, A water circulation heat pump unit 40; A compressor (41) installed inside the water circulation heat pump unit (40) for compressing a refrigerant gas at a high temperature and a high pressure; A high temperature side heat exchanger (42) for recovering high temperature heat while exchanging the compressed refrigerant with water and condensing the refrigerant; When the condensed refrigerant is introduced through the expansion valve 48 and evaporated it is heat exchanged with water to obtain a low temperature heat exchanger (43); Cooling and heating system using waste heat, characterized in that it comprises a four-sided (47) for changing the flow direction of the refrigerant for reverse cycle operation of the heat pump for cooling and heating during the summer and winter. The method of claim 1, The cooling / heating system is a means for heating and supplying hot water in the water circulation heat pump unit 40. The high-temperature side heat exchanger 42 supplies hot refrigerant gas discharged from the compressor and water at room temperature to the circulation pump 46. Cooling and heating system using the waste heat, characterized in that the heat is continuously circulated by the hot water is exchanged and absorbed by the water, and stored in the hot water tank (44). The method of claim 1, The cooling / heating system is a means for cooling and supplying cold water in the water circulation heat pump unit 40. The low temperature side heat exchanger 43 passes through the expansion side 48 after passing through the high temperature side heat exchanger 42 to a low temperature. Cooling and heating system using waste heat, characterized in that the low-temperature refrigerant gas evaporated and the water at room temperature is circulated by the circulation pump 46, the low-temperature heat is continuously exchanged with the water and stored in the cold water tank (45).