KR101502378B1 - Heat pump electric boiler for air conditioning and heating system having automatic defrosting function and method for defrosting - Google Patents

Abstract

A water can (400) serving as an evaporator and including a plurality of defrost warming tanks, an automatic solenoid valve (400) for automatically supplying hot water into the water can (400) A hot water tank 420 for storing hot water, a circulation pump 430 for circulating hot water from the hot water tank 420 and the water can 400, a liquefied refrigerant gas A condenser 450 for condensing the high-temperature high-pressure refrigerant from the compressor 440, an expansion valve 460 for decompressing the high-pressure liquefied refrigerant, a compressor 440 for compressing the water can 400, And a temperature sensing sensor 470 for sensing the temperature of the heat pump.

Description

TECHNICAL FIELD [0001] The present invention relates to an electric heating boiler, an electric heating boiler, and a defrosting method.

The present invention relates to an electric heating boiler for an air conditioning heat pump having an automatic defrosting function, and more particularly, to a method for automatically defrosting an electric heating boiler by automatically supplying hot water to a defrost warming tank in a water can, An electric heating boiler, and a defrosting method.

Generally, the heat pump is filled with refrigerant that carries heat. These heat pumps are mainly composed of compressors, evaporators, condensers and expansion valves. The refrigerant injected into the heat pump passes through the evaporator and evaporates (vaporizes from the liquid to the gas) while absorbing heat (for example, ground water heat, river water heat, And sucked into the compressor. In the compressor, the refrigerant is compressed, and the high-temperature and high-pressure state is transferred to the condenser. In the condenser, the refrigerant is liquefied while the heat is released (using hot air and hot water). The liquefied refrigerant is decompressed through the expansion valve and enters the evaporator with the refrigerant in the low-pressure and low-temperature liquefaction state. As described above, the heat pump absorbs the low-temperature heat while repeating the cycle, and generates heat at a high temperature required by the compressor power.

The advantage of such a heat pump is that the heat pump itself does not generate heat but carries the function of transporting it. It utilizes the heat of evaporation and heat of the refrigerant gas to absorb external heat and uses electric 1KW It is a high efficiency energy saver that produces 3 ~ 7KW (COP 3-7) efficiency.

In addition, the heat pump utilizes electricity, natural heat, or waste heat, so there is no discharge of harmful gas such as CO ₂ , and it is a green environment-friendly system without any danger such as explosion fire.

An air conditioner using such a heat pump is a device that performs a cooling and heating function by using a refrigeration cycle, and is composed of an indoor unit having an indoor heat exchanger, an outdoor unit having an outdoor heat exchanger and a compressor.

In the summer, the cooling / heating unit performs a cooling function by supplying cool air to the room by cooling the low temperature and low pressure refrigerant to the indoor heat exchanger toward the indoor heat exchanger, and performs a refrigeration cycle in the opposite direction to the summer during winter to supply high- So that the heating function is performed by providing warm air to the room.

FIG. 1 is a schematic view showing the structure of a general air conditioner, which includes an indoor heat exchanger 110 for condensing a refrigerant gas compressed at a high temperature and a high pressure to room temperature and generating heat, and an indoor heat exchanger 110 A fan 120 is installed in the room for heat-exchanging heat with indoor air for forced heat dissipation.

A capillary 150 for reducing the pressure of the refrigerant passing through the indoor heat exchanger 110 to a low pressure, an outdoor heat exchanger (not shown) for evaporating the low-temperature low-pressure refrigerant gas introduced through the capillary 150, A fan 130 for blowing air cooled to the outside by generating air toward the outdoor heat exchanger 140 and compressing the refrigerant passing through the outdoor heat exchanger 140 to a high temperature and a high pressure to supply the refrigerant to the indoor heat exchanger 110, The compressor 100 is installed.

In this structure, heating is performed through the following process.

The compressor 100 compresses the refrigerant to a high temperature and a high pressure and circulates the refrigerant to the indoor heat exchanger 110. The indoor heat exchanger 110 then exchanges the refrigerant introduced from the compressor with the room air, Condensate with refrigerant. That is, strong wind from the fan 120 is blown toward the indoor heat exchanger 110, and then the heat of the refrigerant passing through the inside of the indoor heat exchanger 110 is radiated to the room by the wind to be condensed into a liquid state at room temperature do. At this time, the high heat radiated from the indoor heat exchanger (110) heats the room air and blows it into the room, thereby heating the room.

Then, the refrigerant in the converted liquid state at the low temperature and low pressure is recycled to the compressor 100 through the outdoor heat exchanger 140, and the refrigerant is compressed into the high temperature and high pressure refrigerant do. As described above, the cooling / heating unit repeatedly performs the refrigeration cycle, and the indoor air is heated by continuously discharging the heated air from the indoor heat exchanger 110 to the room.

However, since the surface temperature of the outdoor heat exchanger 140, which is a function of evaporating the refrigerant during the performance of the heating function, is lowered and the surface of the outdoor heat exchanger 140 is heated, In order to remove the heat, the refrigerating cycle of the conventional cooling and heating unit is reversed so that defrosting can be performed as heat generated in the outdoor heat exchanger 140 itself.

However, in the case of the defrosting operation function, the room is not heated during the defrosting operation period, and unnecessary heat loss occurs due to the reverse circulation of the refrigeration cycle.

Based on the recognition of these problems, various solutions have been proposed in the past, and the following is an explanation of examples of these various solutions.

First, the measures described in the Public Utility Model Public Disclosure Bulletin 1998-028855 are as follows.

FIG. 2 is a schematic view of a public utility model publication 1998-028855, which shows the structure of an apparatus for removing the property of an outdoor unit generated during a heating operation as described above. The structure of the defrosting apparatus shown in FIG. 2 includes a heating pipe 210 for heating hot water formed on the outer circumferential surface of the compressor 200 and a pumping means for pumping hot water stored in the heating pipe 210 to the defrosting means 240 (250) is provided on one side of the outdoor heat exchanger (220).

The heating pipe 210 is helically wound on the outer circumferential surface of the compressor and heats the hot water circulated inside the compressor 200 through the heat of the compressor 200. The pumping means 250 heats hot water heated by the heating pipe 210 through the hose 240 ).

3 is a key drawing of the registration utility model publication 20-0159702, which has a similar aspect in that it is an apparatus for removing the property of the outdoor unit for the purpose of the invention. The structure of the defrosting apparatus shown in FIG. 3 includes a water tank 330 formed at one side of the outdoor heat exchanger 310 for storing hot water, a heater 370 for heating the hot water to a predetermined temperature, A water temperature sensor 340 for sensing the temperature of the hot water of the water tank 330 and a control unit for controlling the on / off operation by receiving power from the water temperature sensor 340 and applying power to the heater 370 350).

When the outdoor temperature is lowered during the heating operation, the temperature of the outdoor heat exchanger 310 is changed depending on the temperature difference, and hot water stored in the water tank 330 is supplied to the pumping unit 380 The hot water is circulated into the upper part 320 to remove the gaps on the surface of the outdoor heat exchanger 310.

More specifically, a predetermined amount of water is stored in the water tub 330, and the water is periodically heated by the heater 370 to maintain a constant temperature.

The heater 370 is operated and controlled by the control unit 350. The current temperature is input to the control unit 350 from the water temperature sensor 340 installed in the water tank 330. The control unit 350 controls the water temperature And receives power from the sensor 340 and applies power to the heater 370 when the current water temperature is lower than the preset temperature.

When the water temperature of the water tank 330 reaches the set temperature, the control unit 350 turns off the power applied to the heater 370 to stop heating by the heater 370 so that the water temperature is always maintained constant.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a defrost apparatus and method capable of eliminating the deterioration of the outdoor heat exchanger without the reverse circulation of the refrigeration cycle and without unnecessary heat loss due to the reverse circulation.

Another object of the present invention is to provide a defrosting device and a defrosting method which can remove the property without using an electric heat coil.

It is still another object of the present invention to provide a defrost apparatus and method which can remove hot water by using hot water without heating the water in the water tank through a heater.

In order to achieve the above object, the present invention has a structure different from that of the conventional defrost apparatus, and the core components of such a structure are as follows.

The defrosting device of the present invention serves to serve as an evaporator and has a water can 400 including a plurality of defrost warming tanks so that hot water is automatically supplied into the water can 400 according to the temperature measured from the temperature sensing sensor 470 A temperature control unit 410 for controlling the automatic solenoid valve, a hot water tank 420 for storing hot water, a circulation pump 430 for circulating hot water from the hot water tank 420 and the water can 400, A condenser 450 for condensing the high-temperature high-pressure refrigerant from the compressor 440, an expansion valve 460 for reducing the pressure of the high-pressure liquefied refrigerant, a compressor 440 for compressing the refrigerant gas, And a temperature sensing sensor 470 for sensing whether or not the temperature is generated.

In the case of the present invention, there is no need to reverse cycle the refrigeration cycle in order to remove the property of the outdoor heat exchanger, thereby reducing power consumption and unnecessary heat loss while generating hot water in the outdoor heat exchanger It is possible to save the electricity consumed for heating the heater, thereby reducing the electricity consumption due to electricity consumption.

In addition, after the defrosting is completed, the return to the original state is quick, and the coefficient of performance (COP) is high accordingly.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a schematic diagram of a conventional prior art air conditioner.
2 shows a prior art cooling / heating apparatus having a defrosting function.
3 shows another prior art cooling / heating apparatus having a defrosting function.
4 is a view showing an electric heating boiler for an air conditioning heat pump having an automatic defrosting function according to the present invention.
5 is a flowchart showing a defrosting process of the electric heating boiler of the present invention.

As described above, according to the present invention, there is a problem in the conventional air conditioner, that is, a method for eliminating the property generated in the outdoor heat exchanger, the electricity consumption and the unnecessary heat loss due to the reverse circulation of the refrigeration cycle, The present invention relates to an apparatus and method for solving the problem of not consuming defrosting through circulation but consuming excessive electricity by using a heater to heat water.

In addition, in the conventional air conditioner, when the heat pump of the air conditioner is operated, hot air is generated on one side and cold air is generated on the other side.

In the case of cooling, when the heat pump is activated, the air on the cold side is blown into the fan to cool the room, and hot air is blown out of the outdoor unit.

In the case of heating, when the heat pump is activated, the gas on the hot side is boiled using a heat exchanger, and the cold air is blown out of the outdoor unit. In this case, if the outdoor unit also emits cold air and the outside temperature suddenly drops, the outdoor unit may generate hot springs. In this case, the heat pump may not operate. Therefore, in order to operate the heat pump, it is necessary to dissolve the property of the outdoor unit. In the conventional case, defrosting was performed by using hot wire. However, in the case of defrosting using such a hot wire, there is a high possibility of electric tugging due to excessive consumption of electric power, and the speed of returning to the original state after defrosting is low, resulting in a low coefficient of performance (COP).

FIG. 4 is a view showing an electric heating boiler for an air conditioning heat pump having an automatic defrosting function according to the present invention.

4, the defrost apparatus of the present invention functions as an evaporator and includes a water can 400 including a plurality of defrost warm keeping tanks, a water can 400, A hot water tank 420 for storing hot water, a hot water tank 420 for circulating hot water from the water can 400, A compressor 440 for compressing liquefied refrigerant gas, a condenser 450 for condensing the high-temperature high-pressure refrigerant from the compressor 440, an expansion valve 460 for decompressing the high-pressure liquefied refrigerant, And a temperature sensing sensor 470 for sensing whether or not the water can 400 is formed.

The water can 400, which is a core component of the present invention, includes a plurality of defrost warm keeping tanks (not shown) in the water can, and the number of defrost warm keeping tanks is determined by the capacity of the heat pump. The water can 400 is provided with a temperature sensor 470 for detecting whether or not the water is generated.

The temperature control unit 410 analyzes the measured signal value from the temperature sensor 470 and determines that the water can 400 has been damaged by opening the automatic solenoid valve so that the hot water can be poured into the defrost warming tank of the water can 400 So that the temperature of the defrost warming tank is made higher so as to remove the gasses generated in the water can 400.

The automatic solenoid valve is a valve that is automatically opened or closed to supply hot water into the defrosting warming tank of the water can 400 or to stop the supply of hot water according to a command from the temperature control unit 410.

In the heating and cooling mode of the heating / cooling hint pump electric boiler according to the present invention, the states of the respective operations are shown in the following table.

  heating  1 OFF  2 ON  4 ON  5 OFF  6 OFF  7 OFF   cooling  1 ON  2 OFF  4 OFF  5 ON   AUTO   AUTO

As can be seen from the above table, in case of the heating mode, the valve No. 1 is turned off, the valve No. 2 located between the compressor 440 and the condenser 450 is turned on, and the cold refrigerant gas directed to the water can 400 passes The fourth valve is also turned ON, and the fifth valve, the sixth and seventh fans are turned OFF. In this operation mode, the liquefied gas discharged through the compressor 440 flows into the condenser 450 through the No. 2 valve in the ON state to heat the heating water recovered from the defrost keeping warm tank in the water can 400, 420). The stored hot water is used to heat the floor of the room or to supply hot water.

In addition, the gas cooled in the condenser 450 through the compressor 440 is converted into cold refrigerant gas through the expansion valve, is evaporated through the water can 400 through the valve 4 in the ON state, and then sent to the compressor do. In the case of the heating mode, such a process is repeatedly generated. At this time, when a cold is generated in the water can 400 by the cold refrigerant gas flowing through the No. 4 valve, the occurrence of the hot water is detected by the temperature sensor 470 The temperature controller unit 410 opens the automatic electromagnetic valve 3 to flow hot water to the water can 400 to remove the hot water.

In the cooling mode, the first valve is turned on, the second valve located between the compressor 440 and the condenser 450 is turned off, and the fourth valve is turned off to prevent the coolant from flowing into the water can 400 The fifth valve is turned on so that the cold refrigerant moves to the seventh heat exchanger through the fifth valve and air cooled by the fan 7 is blown into the room to cool the room. The refrigerant passing through the heat exchanger is condensed by the liquefied gas and sent to the compressor (440). At this time, since the valve 2 is in the OFF state, the compressed liquefied gas is cooled not by the condenser 450 but by the heat exchanger of the outdoor unit 6 through the heat exchanger, and then cooled again to be converted into cold refrigerant gas through the expansion valve 460 The process described is repeated.

FIG. 5 is a view showing a method of automatic defrosting of an electric heating boiler pump electric boiler according to the present invention.

Referring to FIG. 5, the automatic defrosting method according to the present invention is performed according to the following steps. In step 500, the temperature sensing sensor 470 senses the temperature of the water can 400, and the sensed measurement value is transmitted to the temperature control unit 410. The temperature control unit 410 compares the measured temperature with a preset threshold value to determine whether the measured temperature is a set threshold value (520). The threshold value set here means a temperature at which hot water supply is not required, that is, a temperature is not generated. That is, if the temperature is lower than the set threshold value, the property is generated. Accordingly, if the measured temperature is not lower than the set threshold value as a result of the comparison, the process returns to step 500 to perform temperature sensing of the water can. Conversely, if the measured temperature is lower than the set threshold value, the flow proceeds to step 530. In step 530, the automatic solenoid valve opens the valve in response to the open signal from the temperature control unit 410. The hot water in the hot water tank 420 supplies hot water to the defrost hot water tank in the water can 400 due to the opening of the valve (step 540). Accordingly, the generated water in the water can 400 is removed due to the supply of the hot water (550).

As described above, it can be seen that the defrosting function is performed only in the heating mode, and in the case of the present invention, the defrosting function can be performed even without a separate heater for heating the water in the defrost warming tank in the water can 400 Which is different from the conventional technique.

While the invention has been shown and described with reference to certain preferred embodiments thereof, it will be understood by those skilled in the art that various changes and modifications may be made therein without departing from the scope of the invention as defined by the appended claims.

400: Water cans
410: Temperature control unit
420: Hot water tank
430: circulation pump
440: Compressor
450: condenser
460: expansion valve

Claims (6)

A water can replacing the role of an outdoor unit;
A hot water tank for storing hot water;
A circulation pump for circulating hot water from the hot water tank and the water can;
A compressor for compressing the liquefied refrigerant gas;
A condenser for condensing the high-temperature high-pressure refrigerant from the compressor;
An expansion valve for reducing the pressure of the high-pressure liquefied refrigerant;
A temperature sensor for detecting whether or not the water can is generated in the cast; And
A temperature control unit for controlling the automatic solenoid valve so that hot water is automatically supplied to the water can according to the measured temperature from the temperature sensor
And an automatic defrosting function. The method according to claim 1,
An electric heating boiler with automatic defrosting function, which includes a defrosting warming tank for storing hot water inside the water can. The method according to claim 1,
Wherein the number of defrost heat keeping tanks included in the water can varies with the capacity of the heat pump. The method according to claim 1,
A heating / cooling heat pump electric boiler having an automatic defrost function, wherein the water can itself serves as an evaporator. Sensing and measuring the temperature of the water can replacing the role of the outdoor unit;
Transmitting the measured temperature value to a temperature control unit;
Comparing the measured temperature with a preset threshold value;
Opening the automatic solenoid valve according to a comparison result; And
The step of supplying hot water to the defrost hot water tank in the water cans through the opened automatic solenoid valve
And an automatic defrosting method. 6. The method of claim 5,
Wherein the automatic solenoid valve opening is made when the measured temperature is lower than a predetermined threshold value.

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