KR100794270B1 - Air heat pump - Google Patents

Abstract

An air source heat pump is provided to increase defrosting efficiency by backward defrosting of the heat pump in cooling/defrosting mode and extend a defrosting period by delaying frosting in heating mode, thereby reducing energy and time required for the defrosting. An air source heat pump includes a first circulation line(L1) connected to a compressor(1) and an evaporator(10) for supplying refrigerant gas of high temperature and high pressure discharged from the compressor to the evaporator to carry out defrosting operation for the evaporator in a backward direction during cooling/heating/defrosting operation mode. A frosting-delay part(20) is mounted at an end of the evaporator and supplied with refrigerant of high temperature to delay the frosting of the evaporator during the heating mode. Second and third circulation lines(L2,L3) are connected to the frosting-delay part, the evaporator, a receiver tank(5), and the compressor to form a branch type circulation part. The branch type circulation part guides flows of refrigerant of high and low temperature and the refrigerant gas of high temperature and high pressure according to the cooling/heating/defrosting operation mode. The frosting-delay part has a differential pressure switch(22) for sensing air pressure difference between both ends of the evaporator and the outside and operating according to the sensed air pressure difference, and a fan(23) assembled with an inverter motor for delaying the frosting of the evaporator. The inverter motor has rotation speed, which is increased or decreased by the operation of the differential pressure switch.

Description

Air source heat pump

1 is a state in which an air heat heat pump is connected to a conventional heating and cooling system.

2 is a system diagram of a heating operation state of a conventional air heat heat pump.

3 is a system diagram of a cooling and defrosting operation state of a conventional air heat heat pump.

4 is a state in which an air heat heat pump is connected to an air conditioning heating system according to an embodiment of the present invention.

Figure 5 is a system diagram of the heating operation state of the air heat heat pump in the embodiment of the present invention.

Figure 6 is a schematic diagram of the cooling and defrosting operation state of the air heat heat pump in the embodiment of the present invention.

* Description of the symbols for the main parts of the drawings *

One ; Compressor 2; 4-way valve

3; Condenser 5; Receiver

6; Dryer 7; Solenoid valve

8 ; Expansion valve 9; Check valve

10; Evaporator 11; Liquid separator

20; Implant delay 21; Air preheater

22; Differential pressure switch (DPS) 23; 휀

30; Branched circulation sections 31, 32, 33, 35; 1,2,3,4 electron valve

34; Pressure Reducing Valve

L1, L2, L3, L4, L5, L6, L7, L8, L9; 1st to 9th circulation lines

9.d1, d2, d3, d4, d5; Check valve

The present invention relates to an air heat heat pump, and more particularly, to an air heat heat pump that makes the cooling and defrosting operation and the heating operation more stable by utilizing the advantages of air heat to the maximum.

In general, a method of obtaining thermal energy is burning a combustible material or using electrical, chemical reactions and reactions, and the thermal energy obtained by the combustion, action and reaction is stored in a heat storage device or converted into a usable state. This is used as a means for cooling, heating or heating.

However, since the method for obtaining thermal energy as described above has to prepare a combustible material which can be combusted and to obtain thermal energy while combusting it, the necessity of an apparatus for combusting the combustible material is caused by the combustion of the combustible material. There is no doubt that the damage caused by the production of environmental pollutants is serious, and the actual environmental pollution caused by the combustion of flammable substances is reaching a serious state.

In addition, the method of acquiring thermal energy by electrical and chemical reactions produces significantly less pollutants than the method of combusting the combustible materials. However, the electrical and chemical methods require materials or devices for these reactions. Therefore, when you want to obtain a large amount of thermal energy, there is a closed end of the large volume of the device accordingly.

In order to improve the above problems, a cooling and heating system using an air heat heat pump has been disclosed, and the air heat heat pump has a compressor (1) to a four-way valve (2) during normal heating operation as shown in FIGS. → condenser (evaporator for cooling and defrosting operation) (3) → check valve (9) → receiver (5) → dryer (6) → solenoid valve (7) → expansion valve (Expansion) (8) → check valve ( 9) → evaporator (condenser in cooling and defrosting operation) (10) → four-way valve (2) → liquid separator (11) → compressor (1) the flow of the refrigerant gas flow.

That is, the high temperature and high pressure refrigerant gas discharged from the compressor (1) is heat-changed with the low temperature water in the condenser (3) to change into a refrigerant, the water of the room temperature is heated up to 50 ℃ or more hot water for heating and cooling system It is supplied to the air conditioner 200 through the heat storage tank 100.

At this time, the condensed refrigerant passes through the check valve (9) and passes through the expansion valve (8) through the receiver (5), the dryer (6) and the solenoid valve (7) to decompress the evaporator to a low temperature liquid refrigerant Supplied to 10,

The evaporator 10 is to convert the low-temperature liquid refrigerant to a low-temperature low-pressure refrigerant gas with a reduced pressure while absorbing heat from the air in the atmosphere and then supply it to the compressor (1).

On the other hand, the air heat heat pump defrosting (evaporation) in the evaporator 10 during the heating operation in winter, defrosting the frost formed as described above using a high-temperature, high-pressure refrigerant gas (hot gas). The defrosting operation is performed by electric defrost, and the like, and the defrosting operation is shown in FIGS. 1 and 3.

That is, the defrosting time using the high temperature and high pressure refrigerant gas is related to the degree of frosting when the outside air temperature is lowered below a certain temperature by supplying the high temperature and high pressure refrigerant gas by measuring the outside temperature, the refrigerant evaporation temperature, or by using the outside temperature sensor. It supplies the refrigerant gas of high temperature and high pressure to the evaporator 10 once every 1 hour for about 5 minutes to 10 minutes, and removes the frost formed on the evaporator 10 by reverse operation (same as the cooling operation) of normal heating. Will be.

Although there is a difference in degree depending on the equipment, the conventional air heat heat pump defrosts the evaporator 10 once or twice an hour by an automatic defrosting control program when the outside air temperature falls below a certain level. Refrigerant gas of high temperature and high pressure is introduced into the evaporator 10 according to the program of defrosting time even in the state of low temperature, low ambient temperature, but low relative humidity, and no frosting. There is a problem in that the non-productive operation to re-cool the hot water produced by passing through the condenser (3) repeatedly performed every defrost cycle. This causes a burden on the compressor (1) due to the abnormal operation of the cooling and heating cycles as well as the heat loss, causing a shortened life.

On the contrary, even when the outside temperature is high but the relative humidity is also high, excessive dropping occurs, since the refrigerant gas is supplied at a high temperature and high pressure only for a set time, the defrost is not completed and the frost is frozen. During the defrosting time, the freezing area is continuously diffused without defrosting to reduce the heat exchange area, and thus, the low-temperature refrigerant gas supplied from the expansion valve 8 is supplied to the compressor 1 in a liquid state in which no refrigerant is evaporated. Since the compressor 1 is driven by liquid compression, there is a problem of causing damage.

Accordingly, the present invention has been made to solve the above-mentioned problems, and in the cooling and defrosting operation mode, the defrosting function of the cooling and heating system is increased through reverse defrosting of the heat pump, and in the heating operation mode, the refrigerant passing through the condenser is air. By circulating the preheater, the waste heat recovery as well as the delay of the defrosting can extend the defrosting cycle, which saves calories during defrosting and shortens the defrosting time, and intelligently manages the state of defrosting and defrosting through the differential pressure switch (DPS). The purpose is to provide an air heat heat pump that can achieve the best equipment efficiency and stability of operation.

The air heat heat pump of the present invention for achieving the above object is a compressor, a four-way valve, a condenser, a check valve, a receiver, a dryer, an solenoid valve, an expansion valve, an evaporator, and a liquid separator so that cooling and heating and defrosting operations are performed. In configuring an air heat heat pump connected to each other, the compressor and the evaporator are configured to supply high-temperature, high-pressure refrigerant gas discharged from the compressor to the evaporator in a cooling / heating / defrosting operation mode to guide the reverse defrost of the frost formed on the evaporator. One circulation line (L1) is connected and configured, one end of the evaporator is supplied with a high-temperature refrigerant during the heating operation to form a defrosting delay to delay the frost formation, and the second and third circulation lines (L2, L3), and the second and third circulation lines are connected to the frost delay unit, the evaporator, the receiver, and the compressor to heat and cool the defrosting operation mode. Depending characterized in that the connection configuration circular portion of the branch-type for guiding the refrigerant gas flow in the high and low temperature of the coolant flow and the high temperature and high pressure.

According to another aspect, the concept of the delay is installed on the air suction side of the evaporator, the hot liquid refrigerant passing through the condenser during the heating operation is supplied through the second circulation line to preheat the outside air intake air by using it, and the frost on the evaporator It includes an air preheater to delay the implantation.

According to another aspect of the present invention, the conception delay unit senses a pressure difference between air intakes to both ends of the evaporator, and operates according to the result of the differential pressure switch, and the speed is decelerated from the operation of the differential pressure switch. Includes a fan with an inverter motor for delaying.

According to another aspect, the branched circulation portion is branched from the second circulation line and the first electromagnetic valve and a plurality of check valve for preventing the backflow opening and closing to guide the high temperature refrigerant supplied through the circulation line of the condenser to the air preheater A fifth circulation line having a second electromagnetic valve installed and controlled to guide the low temperature refrigerant, which is branched from the fourth circulation line and the third circulation line, which are exchanged with the air preheater to the receiver, and the circulation of the compressor in the fourth circulation line. Branched to the evaporator in the sixth circulation line and the circulation line of the receiver and the third electromagnetic valve and the pressure reducing valve which is opened and closed to guide the high-temperature and high-pressure refrigerant gas discharged from the compressor to the air preheater, the heating operation mode In case of cooling and defrosting operation mode, evaporate low temperature refrigerant supplied through expansion valve. Low temperature discharged by heat exchange in the air preheater in the defrosting operation mode connected to the seventh circulation line, the third circulation line and the seventh circulation line provided with a check valve for preventing the flow of high temperature discharged from the air to the preheater to the air preheater An eighth circulation line having a fourth electromagnetic valve and a check valve for preventing backflow, and a ninth circulation line branching from the fourth circulation line to a seventh circulation line and installing a check valve for preventing a backflow to guide the refrigerant to the receiver; do.

Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.

4 is a state diagram in which an air heat heat pump is connected to an air conditioning heating system according to an embodiment of the present invention, FIG. 5 is a system diagram of a heating operation state of an air heat heat pump according to an embodiment of the present invention, and FIG. The system diagram of the cooling and defrosting operation state of the heat pump is shown.

4 to 6, the air heat heat pump according to an embodiment of the present invention is connected to a cooling and heating system including a heat storage tank 100 and an air conditioner 200, compressor (1), four-way valve ( 2), condenser (3), receiver (5), dryer (6), solenoid valve (7), expansion valve (Expansion) (8), check valve (9), evaporator (10), liquid separator (11) High temperature and high pressure discharged from the compressor (1) in the air-conditioning and defrosting operation mode of the air heat heat pump while being connected to the circulation line (a, b, c, d, e, f, g, h, i) The compressor 1 and the evaporator 10 are connected to the first circulation line L1 so as to perform a reverse defrost supplying the refrigerant gas to the evaporator 10.

One end of the evaporator 10 is provided with a defrosting part 20 which is supplied with a high temperature refrigerant and a high temperature and high pressure refrigerant gas during heating operation of an air heat heat pump, and delays frost formation on the evaporator 10. The concept of the delay unit 20 includes an air preheater 21, a differential pressure switch 22, and a fan 23 mounted with an inverter motor.

The air preheater 21 is installed on the air suction side of the evaporator 10, and receives the high temperature refrigerant through a second circulation line (L2) to be described later when heating the air heat heat pump. The preheating of the suction air, preheating the outside air suction air will delay the frost on the evaporator (10).

The differential pressure switch 22 is configured to detect the pressure difference between the rear end of the evaporator 10 and the external air pressure and to increase or decrease the driving speed of the fan 23 equipped with an inverter motor when the pressure difference increases according to the degree of implantation. Due to the reduction in the driving speed of the fan (23), the amount of heat exchange with the outside air is reduced, so that the frost defrosting on the surface of the evaporator 10 may be delayed.

Next, second and third circulation lines L2 and L3 are connected to the air preheater 21 included in the delaying unit 20, while the second and third circulation lines L2 and L3 are connected to each other. The air preheater 21, the evaporator 10, the receiver 5, and the branched circulation section 30 for connecting the compressor (1), the branched circulation section 30 is the heating and cooling According to the defrosting operation mode, the 4,5,6,7,8,9 circulation lines (L4, L5, L6, L7, L8, L9) guide the flow of the refrigerant gas of high temperature and high pressure as well as the high temperature and low temperature. It includes.

The fourth circulation line (L4) is configured to guide the high temperature liquid refrigerant supplied through the circulation line (c) of the condenser (3) branched from the second circulation line (L2) to the air preheater (21) On the line, a first electromagnetic valve 31 for opening / closing control and a plurality of check valves d1 and d2 for preventing backflow are provided.

At this time, the first electromagnetic valve 31 is controlled by an operation control unit (not shown) of the air heat heat pump, and is opened in the heating operation mode of the air heat heat pump, and closed in the cooling and defrost operation modes. It is composed.

The fifth circulation line (L5) is configured to guide the low-temperature refrigerant, which is branched from the third circulation line (L3) and heat exchanged in the air preheater (21) to the receiver (5), on the line of the air heat heat pump A second electromagnetic valve 32 is opened and controlled by an operation control unit (not shown).

At this time, the second electromagnetic valve 32 is controlled by an operation control unit of the air heat heat pump, and is configured to be opened in the heating operation mode of the air heat heat pump and to be closed in the cooling and defrosting operation modes.

The sixth circulation line L6 connects the fourth circulation line L4 and the circulation line a of the compressor 1 to supply the high temperature and high pressure refrigerant gas discharged from the compressor 1 to the air preheater 21. The third electromagnetic valve 33 and the pressure reducing valve 34 are installed and controlled by the operation control unit of the air heat heat pump.

At this time, the third electromagnetic valve 33 is in a closed operation state in the normal operation of the evaporator 10, and the external air condition is deteriorated, so that the concept of the air preheater 21 is deepened or the compressor 1 is operated in a bad condition such as cryogenic temperature. It is a protection system developed to supply a high-temperature high-pressure refrigerant gas discharged from the appropriate amount of air preheater (21).

The seventh circulation line L7 branches to the evaporator 10 in the circulation line f of the receiver 5, and in the heating operation mode, the low temperature refrigerant supplied through the expansion valve 8 to the evaporator 10. ), And in the cooling and defrosting operation mode, the hot refrigerant discharged from the evaporator 10 is guided to the air preheater 21, and a check valve d3 for preventing backflow is installed on the line.

The eighth circulation line L8 is branched from the third circulation line L3 to the seventh circulation line L7 to receive the low temperature refrigerant discharged from the air preheater 21 in the air-conditioning and defrosting operation mode. The fourth electromagnetic valve 35 and the check valve (d4) for preventing a back flow are installed on the line.

At this time, the fourth electromagnetic valve 35 is controlled by the operation control unit of the air heat heat pump and is opened in the cooling and defrosting operation modes, and the liquid refrigerant passing through the evaporator during reverse defrosting and cooling of the evaporator 10 is cooled. Is condensed through the air preheater (two stage condenser) to reduce the liquid refrigerant temperature to increase the cooling efficiency.

The ninth circulation line (L9) is branched from the fourth circulation line (L4) to the seventh circulation line (L7) is installed check valve (d5) for preventing the back flow, which is the air heat heat pump cooling and defrost operation The high temperature refrigerant discharged from the evaporator 10 when operating in the mode is circulated to the air preheater 21 through the fourth circulation line L4 and the second circulation line L2 to preheat the intake air and thus to the evaporator 10. By raising the air temperature to prevent defrosting or delaying the defrosting, the defrosting cycle is extended and the cooling efficiency is improved by improving the condensation efficiency during cooling.

In addition, a check valve d5 is installed so that the high temperature liquid refrigerant circulated from the fourth circulation line L4 to the air preheater does not flow backward in the direction of the seventh circulation line L7.

Referring to Figures 4 to 6 attached to the operation according to an embodiment of the present invention configured as described above are as follows.

First, when the air heat heat pump connected to the heat storage tank 100 and the air conditioner 200 operates in the heating operation mode, the fourth electromagnetic valve provided in the eighth circulation line L8 by the operation control unit of the air heat heat pump. 35, the closing control is performed, the first and second electromagnetic valve 31, 32 provided in the fourth and fifth circulation lines (L4) (L5) is opened control, the four-way valve (2) is The opening direction is determined in the direction of the condenser 3.

Then, when the high temperature and high pressure refrigerant gas is discharged from the compressor (1), the high temperature and high pressure refrigerant gas is condensed through the circulation line (a) → four-way valve (2) → circulation line (b) → condenser (3). Is done.

At this time, the high temperature and high pressure refrigerant gas discharged from the compressor (1) is heat-exchanged with the low temperature water in the condenser (3) is a phase change to the high temperature refrigerant, the hot water circulated in the heat storage tank 100 is hot water 50 ℃ or more The temperature is raised to the heat storage tank 100 through the supply path (HWS) of the heating and cooling system for heating is supplied to the air supply 200 heating supply water.

Next, the high temperature refrigerant in which the phase change is made in the condenser 3 has a circulation line (c) → a fourth circulation line (L4) → a second circulation line (L2) → a frost delay in which the first electron valve 31 is opened. Bar is supplied to the air preheater 21 included in the part 20,

When a high temperature refrigerant is passed through the air preheater 21, the outside air suction air sucked into the air suction side of the evaporator 10 is preheated, and thus, in the evaporator 10 during the heating operation of the air heat heat pump. Defrosting can be delayed by the preheated fresh air intake air.

At this time, the high temperature refrigerant for preheating the outside air suction air while passing through the air preheater 21 is converted into a low temperature refrigerant, and then the third circulation line L3 → the fifth circulation line in which the second electron valve 32 is opened ( L5) → circulating lines (d, f, e) → receiver (5) → dryer (6) → solenoid valve (7) to reduce the pressure by expansion valve (8).

Next, the low-temperature refrigerant depressurized as described above is introduced into the evaporator 10 through the circulation line g → seventh circulation line L7.

The evaporator 10 converts a low-temperature refrigerant having a reduced pressure into a low-temperature low-pressure gas while absorbing heat from air in the atmosphere, and then converts the low-temperature refrigerant into a low-temperature low-pressure gas. h) → the liquid separator (11) → circulating to the compressor (1) through the circulation line (i).

At this time, when the low temperature refrigerant is depressurized through the expansion valve 8 and the flow is guided to the evaporator 10, the evaporation efficiency of the low temperature refrigerant made in the evaporator 10 is increased, and thus the compressor 1 By increasing the temperature of the refrigerant supplied to, the heating efficiency of the air-conditioning system using the air heat heat pump can be further improved.

Here, the evaporator 10 includes a fan 23 on which the differential pressure switch 22 and the inverter motor are mounted as the concept delay unit 20, and the differential pressure switch 22 is formed on the evaporator 10. When this is done, the rear end of the evaporator 10 and an external pressure difference are increased and are sensed.

When a pressure difference occurs due to a slight conception, information sensed by the differential pressure switch 22 is transmitted to the operation control unit, and the operation control unit slows down the driving speed of the fan 23 to reduce the amount of air passing through to suppress the progression of sexual attachment. On the other hand, the partial pre-defrost signal is sent to remove the slight frosting by using the air preheater 21.

According to the partial defrost signal of the operation control unit, a control signal for opening the third electronic valve 33 provided in the sixth circulation line L6 is generated. Accordingly, the high temperature and high pressure refrigerant gas discharged from the compressor 1 is a pressure reducing valve. While reducing the pressure by the 34, the sixth circulation line L6 is supplied to the fourth circulation line L4 to increase the temperature of the high temperature liquid refrigerant supplied from the condenser, and then through the second circulation line L2. 21).

Then, a partial defrost mode is configured to remove the slight defrost formed on the evaporator 10 as well as the air preheater while the high temperature liquid refrigerant is circulated in the air preheater 21. Since the heating flow is maintained for a short time, the energy consumption and the compressor are not overwhelmed compared to the total reverse defrosting, and uneconomical problems such as heating hot water calorie consumption are solved.

That is, the design goal of the partial defrosting mode is to suppress the reverse cycle defrosting by frequently removing the slight defrosting for a short time while maintaining the normal heating cycle before the complete defrosting is achieved.

As described above, when the defrosting of the evaporator 10 is not delayed due to the partial defrosting mode, the deepening of the defrosting occurs. That is, the pressure difference between both ends of the evaporator 10 is not solved while the defrosting occurs a lot. When the reverse defrost command set value is reached, the operation control unit commands and operates the reverse defrost operation mode.

That is, when the pressure difference between the both ends of the evaporator 10 by the differential pressure switch 22 is not resolved due to partial defrosting, the second and third electromagnetic valves provided in the fifth and sixth circulation lines L5 and L6 are partially defrosted. 32 and 33 generate a control signal for closing the high temperature and high pressure discharged from the compressor 1 while generating a control signal for opening the fourth electromagnetic valve 35 provided in the eighth circulation line L8. The refrigerant gas is directly guided to the evaporator 10 through the four-way valve (2) and the first circulation line (L1).

Then, the high temperature and high pressure gas supplied from the compressor 1 is supplied to the evaporator 10 to defrost the evaporator frost and then converts to a high temperature liquid refrigerant state to guide the flow to the air preheater 21 so that the air preheater is also defrosted. As the air flows in, the refrigerant flows to shorten the evaporator defrost time.

At this time, the high temperature liquid refrigerant passing through the evaporator is converted into a low temperature refrigerant after passing through the air preheater 21 and directly through the eighth circulation line L8 in which the fourth electron valve 35 is opened. Is returned.

When the defrost is completed and the pressure difference is eliminated at the front and rear ends of the evaporator 10, the operation control unit of the air heat heat pump operates the control program to return the air heat heat pump to the normal heating operation mode from the defrost operation mode. .

On the other hand, when the air heat heat pump connected to the heat storage tank 100 and the air conditioner 200 is operated in the cooling operation mode, the fourth and fifth circulation lines L4 and L5 and the sixth by the operation control unit of the air heat heat pump The first, second and third electromagnetic sides 31 and 32 and 33 of the circulation line L6 are closed, and the fourth electromagnetic side 35 provided in the eighth circulation line L8 is open-controlled. The four-way valve 2 is changed in the opening direction to the first circulation line L1.

Then, when the refrigerant gas of the high temperature and high pressure is discharged from the compressor 1, the refrigerant gas of the high temperature and high pressure passes through the circulation line (a), the four-way valve (2), the first circulation line (L1), the evaporator (in the cooling operation mode). Condensation takes place (10).

That is, during cooling, the refrigerant gas of high temperature and high pressure discharged from the compressor 1 is condensed by circulating air in an evaporator (condenser) to change phase into a high temperature liquid refrigerant, and the high temperature refrigerant is the seventh circulation line (L7). ) Is passed through the air preheater 21 via the ninth circulation line (L9) → the second circulation line (L2) to change into a low temperature refrigerant through sufficient heat exchange.

Next, the low-temperature refrigerant heat-exchanged while passing through the air preheater 21 is the third circulation line (L3) → the fourth circulation line (L8) → the receiver (5) → the dryer in which the fourth electron valve 35 is opened. (6) → solenoid valve (7) → expansion valve (8) → circulation line (d, c) is supplied to the condenser (evaporator) which evaporates in the cooling / defrosting operation mode, whereby the condenser (3) After producing the cold water it will be supplied to the heat storage tank 100 and the air conditioner 200 through the supply passage (CWS).

At this time, the low temperature liquid refrigerant absorbs heat from cold water in the condenser (3), which evaporates and vaporizes into low temperature low pressure gas, and then passes through the circulation line (b, h) → liquid separator (11) → circulation line (i). It is circulated to the compressor (1).

Here, the defrosting operation mode of the air heat heat pump has the same operation cycle as that of the cooling operation mode, and descriptions thereof will not be repeated below.

As described above, in the present invention, while the conventional heat pump repeatedly performs the heating mode and the defrost mode by a program, the partial defrost mode is developed to operate the reverse cycle defrost operation mode (cooling mode) that is critical to energy consumption and equipment life. By minimizing and minimizing the reduction of heat loss and equipment life due to repeated defrosting operation, it is operated in conjunction with the airflow control function and air preheater to perform defrosting in a short time more efficiently than the existing equipment when operating the defrost mode in the worst case. The intelligent control system is configured to select and control partial defrosting and reverse cycle defrosting by intelligently monitoring the state of frosting. The air preheater is installed in front of the evaporator to provide high temperature liquid refrigerant heat passing through the condenser. To prevent implantation in the evaporator In order to improve the cooling efficiency by cooling the liquid refrigerant of the high temperature condensed in the evaporator (10) that serves as a group once again.

The biggest problem of the present invention is that the existing air heat heat pump can solve the problem of defrost which is a key problem of weakness in winter heating and the problem of compressor burnout, and the control system that can accurately determine and intelligently control all equipment and operation conditions It is designed to reduce the operating costs and spread the air heat heat pump, which is an eco-friendly facility, because it is designed to apply to the customers without specialized knowledge.

The present invention is not limited to the above-described specific preferred embodiments, and various modifications can be made by any person having ordinary skill in the art without departing from the gist of the present invention claimed in the claims. Of course, such changes will fall within the scope of the claims.

Claims (5)

Compressor, 4-way valve, condenser, receiver, dryer, first solenoid valve, expansion valve, check valve, evaporator, liquid separator are connected to each other through the circulation line for air conditioning and defrost operation. , The compressor and the evaporator is connected to the first circulation line for supplying a high-temperature, high-pressure refrigerant gas discharged from the compressor in the heating and cooling / defrosting operation mode to the evaporator to guide the reverse defrost of the frost formed on the evaporator, One end of the evaporator is configured to receive a high-temperature refrigerant during the heating operation to form a defrosting delay to delay the frost defrosting, The second and third circulation lines are formed in the conception delay unit, The second and third circulation lines connect branching delay units, evaporators, receivers, and compressors, and branched circulation units for guiding high and low temperature refrigerant flows and high and high pressure refrigerant gas flows according to cooling and heating and defrosting operation modes. Make connections, The defrosting delay unit detects an air pressure difference between both ends of the evaporator and the outside air pressure and operates according to the result, and an inverter motor for decelerating the frost in the evaporator by decelerating and decelerating the speed from the operation of the differential pressure switch. Air heat heat pump characterized in that it comprises a 장착 equipped with. The method of claim 1, wherein the conception delay unit, It is formed on the air suction side of the evaporator, and receives a high-temperature refrigerant during the heating operation through the second circulation line to preheat the outside air intake air by using it, characterized in that it comprises an air preheater to delay the frost formation in the evaporator Air heat heat pump made with. delete The method of claim 1, wherein the branched circulation portion, A fourth circulation line provided with a first electromagnetic valve and a plurality of backflow prevention check valves which are opened and closed to guide the high temperature refrigerant supplied from the second circulation line through the circulation line of the condenser to the air preheater; A fifth circulation line having a second electromagnetic valve which is opened and closed to guide the low temperature refrigerant, which is branched from the third circulation line and heat exchanged in the air preheater, to the receiver; A sixth circulation line having a third electromagnetic valve and a pressure reducing valve installed and controlled to branch the fourth circulation line from the fourth circulation line to the circulation line of the compressor and guide the high temperature and high pressure refrigerant gas discharged from the compressor to the air preheater; Branch to the evaporator in the circulation line of the receiver.In the heating operation mode, the low temperature refrigerant supplied through the expansion valve is guided to the evaporator.In the cooling and defrost operation modes, the high temperature refrigerant discharged from the evaporator is transferred to the air preheater. 7th circulation line which installed the check valve to prevent backflow, An eighth circulation line branched from the fourth circulation line to the seventh circulation line and provided with a fourth electromagnetic valve and a check valve for preventing backflow to guide the low temperature refrigerant discharged from the air preheater to the receiver in the air-conditioning and defrosting operation modes; , And a ninth circulation line branched from the fifth circulation line to the seventh circulation line and provided with a check valve for preventing a backflow. The method according to claim 1 or 4, The air heat heat pump operates an operation mode for preventing or delaying the evaporator implantation while maintaining normal heating by using the delaying unit. When a slight frosting occurs during normal heating, the air heat further comprises a partial defrosting mode in which a gas of a high temperature and high pressure is supplied to an air preheater included in the frost delay part through a sixth circulation line to defrost. Heat pump.

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