KR100510778B1 - Hybrid heat pump - Google Patents

Abstract

The present invention relates to a complex heat pump, by installing a heat exchanger divided into two stages to improve the condensation effect of the condenser and the regeneration effect of the dehumidifying solution.

The present invention provides a combined heat pump in which a refrigerant compression cycle consisting of a compressor, a condenser, an expansion valve, and an evaporator, and a dehumidification cycle consisting of a regenerator and a dehumidifier are integrally combined. A discharge fan is provided to form an air flow path, and is composed of a tank in which a solution storage unit is formed below the indoor air inlet. The upper and lower heat exchangers are installed at an inner upper end of the tank, and the upper side of the upper and lower heat exchangers. An indoor unit having upper and lower solution distributors respectively installed therein and a solution support between the upper heat exchanger and the lower solution distributor; An outdoor air inlet is provided at one lower side, and an outdoor air outlet and a discharge fan are formed at an upper side thereof, and an air flow path is formed, and a tank having a solution reservoir formed at the lower side of the outdoor air inlet is formed. And an outdoor unit having a lower heat exchanger, upper and lower solution distributors respectively disposed above the upper and lower heat exchangers, and a solution support disposed between the upper heat exchanger and the lower solution distributor. An indoor unit pump and an outdoor unit pump installed between the solution reservoir and the solution distributor; A four-way valve installed between the compressor and the upper heat exchanger; It comprises a valve installed at the point where the discharge pipe of the indoor unit pump and the outdoor unit pump and the upper and lower solution distributors meet.

Description

Hybrid Heat Pump {Hybrid heat pump}

The present invention relates to a complex heat pump, and more particularly, to a complex heat pump to improve the condensation effect and the regeneration effect of the dehumidifying solution in the condenser by installing a heat exchanger divided into two stages.

Compressed air cooling system is composed of compressor, condenser, expansion valve, evaporator, piping, and blower. It extracts heat from process air by using refrigerant evaporation in evaporator and uses it to cool building air with cooling process air. The cycle is configured to discharge to the outside air through the condenser.

Liquid desiccant dehumidification system that utilizes liquid dehumidifier to remove moisture from the air consists of dehumidifier, regenerator, solution heat exchanger, solution pump, solution distributor and eliminator to prevent loss due to scattering of desiccant solution. do.

The combined heat pump is a system combining the compressed air cooling system and the liquid desiccant dehumidification system.

The inventor of the present invention has already proposed a cooling and heating system using a combined air heat source heat pump in the Patent Publication (10-208627). The present invention relates to a cooling and heating device using a complex air heat source heat pump that simultaneously performs air conditioning of cooling, heating, dehumidification, and humidification of a building as a single device. In a cooling operation, an indoor unit is an evaporator of a compression cycle and a dehumidifying solution cycle at the same time. The outdoor unit is a heating and cooling device using a combined air heat source heat pump which is operated as a condenser of a compression cycle and a regenerator of a dehumidifying solution cycle and simultaneously operates absorption dehumidification and sensible cooling.

However, such a conventional combined heat pump has a problem that condensation does not easily occur during system operation. When the solution is sprayed on the entire heat exchanger, the air sucked under the influence of the heated solution comes into contact with the hot solution from the lower air inlet side. Will not. As a result, sufficient condensation will not occur, resulting in poor cooling or heating efficiency.

In addition, the solution level of the solution reservoir may not be adjusted so that the amount of the solution is too large to exceed the solution reservoir or the amount of the solution is too small may not properly perform dehumidification or humidification.

The present invention has been proposed to solve the above problems, and an object of the present invention is to prevent the incoming air from contacting the hot solution so that sufficient condensation can occur in the condenser, and the dehumidifying solution is a high temperature of the compression cycle condenser. It is to provide a combined heat pump that can effectively utilize the heat of the dendritic superheated steam unit, and take the heat of condensation of the refrigerant from the refrigerant condensation unit and use the regenerated air whose temperature is high.

Another object of the present invention is to provide a combined heat pump capable of efficiently performing dehumidification or humidification by adjusting the solution level of the solution reservoir.

In order to achieve the above object, the present invention,

In a combined heat pump in which a refrigerant compression cycle consisting of a compressor, a condenser, an expansion valve, and an evaporator, and a dehumidification cycle consisting of a regenerator and a dehumidifier are integrally combined,

An indoor air inlet is provided at one side of the lower side, and an indoor air outlet and a discharge fan are formed at the upper side thereof, and an air flow path is formed, and a tank is formed in which a solution storage unit is formed at the lower side of the indoor air inlet. And an indoor unit having a lower heat exchanger, upper and lower solution distributors respectively installed above the upper and lower heat exchangers, and a solution support being installed between the upper heat exchanger and the lower solution distributor. An outdoor air inlet is provided at one lower side, and an outdoor air outlet and a discharge fan are formed at an upper side thereof, and an air flow path is formed, and a tank having a solution reservoir formed at the lower side of the outdoor air inlet is formed. And an outdoor unit having a lower heat exchanger, upper and lower solution distributors respectively disposed above the upper and lower heat exchangers, and a solution support disposed between the upper heat exchanger and the lower solution distributor. An indoor unit pump and an outdoor unit pump installed between the solution reservoir and the solution distributor; A four-way valve installed between the compressor and the upper heat exchanger; It comprises a valve installed at the point where the discharge pipe of the indoor unit pump and the outdoor unit pump and the upper and lower solution distributors meet.

In addition, in one embodiment of the present invention, a valve is provided in each of the discharge unit of the indoor unit pump and the outdoor unit pump, the indoor unit side valve is a solution storage unit of the outdoor unit, the outdoor unit side valve to the solution storage unit and the piping of the indoor unit It provides a combined heat pump, characterized in that connected.

In addition, in another embodiment of the present invention, the solution support is formed to be inclined and provides a combined heat pump, characterized in that divided into two upper and lower stages.

The combined heat pump preferably includes a level controller for operating the indoor unit pump and the outdoor unit pump according to the level of the indoor unit solution storage unit.

The upper heat exchanger is preferably formed to have a lower width and a higher height than the lower heat exchanger in order to increase the contact time with the solution.

In addition, it is preferable that a filter is installed inside the grill at the outlet of the outlet to facilitate filter replacement.

Hereinafter, with reference to the accompanying drawings will be described in detail a preferred embodiment of the combined heat pump according to the present invention.

1 is a summer schematic diagram of a combined heat pump according to the present invention.

Referring to the drawings, the combined heat pump according to the present invention comprises a large outdoor unit 20, the indoor unit 40.

In the outdoor unit 20, an outdoor air inlet 29 is formed at one lower side of the outdoor unit 20, and an outdoor air outlet and a discharge fan 26 are formed at one upper side of the outdoor unit 20.

The lower side of the outdoor air inlet 29 is formed with a solution storage unit 30 that can store the solution to be regenerated for dehumidification and humidification.

Here, the upper heat exchanger 21 used as the regeneration unit of the dehumidifying solution using the heat of the refrigerant superheated steam and the lower heat exchanger 22 used as the condensation unit of the refrigerant are installed at the inner upper end of the outdoor unit 20. .

In addition, an upper solution distributor 23 is installed above the upper heat exchanger 21, and a lower solution distributor 24 is installed above the lower heat exchanger 22.

Between the upper heat exchanger 21 and the lower solution distributor 24 to guide the solution injected from the upper solution distributor 23 to the side in order to prevent the solution having a high temperature during the regeneration process does not affect the condensation of the refrigerant The solution holder 25 is installed.

The indoor unit 40 is also provided with an indoor air inlet 49, an indoor air outlet and a discharge fan 46 in the same manner as the outdoor unit 20 described above, and an air flow path is formed therein, and a solution storage unit 50, Upper and lower heat exchangers 41 and 42, upper and lower solution distributors 43 and 44, and a solution support 45 are installed.

A four-way valve 16 is installed between the compressor 12 and the upper heat exchanger 21, 41, and discharge pipes of the indoor unit pump 15 and the outdoor unit pump 14 and the upper and lower solution distributors 23, 24. Valves 5, 6, 7, and 8 are installed at points 43 and 44 where they meet.

An accumulator 17 may be included between the four-way valve 16 and the upper heat exchangers 21 and 41.

Valves 3 and 4 are installed at the outlets of the indoor unit pump 15 and the outdoor unit pump 14, respectively, below the valves 5 and 6, and the indoor unit side valve 4 is a solution storage unit of the outdoor unit. 30 and the outdoor unit side valve 3 are connected to the solution storage unit 50 of the indoor unit by pipes 3 'and 4'.

When the high concentration of solution is sent from the regeneration unit to the dehumidification unit, the circulation rate of the solution is about 1/10 of the flow rate of the dehumidifying unit, which is the optimum flow rate known from the experimental experience.

In addition, the outdoor unit 20 and the indoor unit 40 have eliminators 28 and 48 for preventing the solution from scattering above the upper solution distributors 23 and 43, and filters 27 and 47 for filtering air. ) Are installed one after the other.

The solution reservoirs 30 and 50 are connected to each other by a pressure equalizing tube 10, and the pressure equalizing tube 10 is provided with a drain valve 2.

The solution reservoir 50 of the indoor unit 40 is provided with a level controller 51 that can adjust the amount of the stored solution.

On the other hand, the compressor 12 used in the present invention preferably uses an inverter scroll compressor. This scroll compressor is equipped with a solenoid valve for loading / unloading between the upper part of the fixed scroll and the low pressure pipe. When the solenoid valve is OFF, the fixed scroll and the turning scroll of the upper side is in close contact and compressed (loading state), when the solenoid valve is OFF, the fixed scroll and the turning scroll are spaced apart and uncompressed (unloading state). Therefore, the capacity is controlled by controlling the ON TIME and the OFF TIME to adjust the refrigerant circulating in the cycle.

In addition, it is preferable that the expansion valve 13 controls the heating and cooling capacity of the indoor unit by controlling the electromagnetic expansion valve by the difference between the indoor use and the set temperature of the room in which the indoor unit is installed using the electronic expansion valve.

Even if the auxiliary heater is not installed on the indoor unit during winter operation, the compressor and simple capillary expansion valve installed in the existing heat pump are replaced with the above-described inverter scroll compressor, electronic expansion valve and accumulator, so that sufficient condensation and evaporation occurs during winter operation. Even indoor indoor unit (regeneration unit) can increase the temperature of the solution.

2 is a winter schematic diagram of the combined heat pump according to the present invention, referring to the drawing, it can be seen that the winter system is only the direction of the refrigerant in the summer system is changed. This is possible by adjusting the four-way valve 16.

3 is a block diagram showing an air flow path of a combined heat pump according to the present invention.

Referring to the drawings, air is introduced into the lower outdoor air inlet 29 and discharged to the outside by the outdoor air discharge fan 26 through the filter 27 at the upper end.

The dehumidifying or humidifying solution is dropped through the upper solution distributor 23 or the lower solution distributor 24 via the upper heat exchanger 21 or the lower heat exchanger 22 to the lower solution reservoir.

In this case, the lower side of the upper heat exchanger 21 is provided with a two-stage solution support (25a, 25b) so that the solution is not sprayed to the indoor unit, the lower end of the outdoor unit is blocked the flow of the upper solution.

The air flows up vertically and the solution flows down vertically, so the heat exchange efficiency is superior to other methods.

Figure 4 is a perspective view of the solution support used in the combined heat pump according to the present invention. As shown in the figure, the solution support 25 installed in the combined heat pump of the present invention has a cross-sectional shape of 'V' and is formed to be inclined in the longitudinal direction so that the solution sprayed through the solution distributor is guided in a predetermined direction. do.

5 is a block diagram showing the configuration of a level controller used in the combined heat pump according to the present invention.

Referring to the drawings, the level controller includes a sensor unit consisting of a water level sensor 503 and a temperature sensor 505, a controller 501 for generating a control signal by receiving a signal from the sensor unit, and the controller 501. The driver 507 generates a driving signal for driving the pump by receiving a control signal of the control unit, and an indoor unit pump 509 and an outdoor unit pump 511 that are turned on / off according to the driving signal of the driver 507.

The water level sensor 503 generates three (a, b, c) different control signals according to the water level, thereby driving the indoor air pumps (509, 511).

Specific driving methods for this are different in summer and winter, which will be described with reference to FIGS. 6 and 7.

6 is a flowchart illustrating summer level control of a combined heat pump according to the present invention.

The summer level control is configured to include an A contact switching determination step (S601), a B contact switching determination step (S603), a C contact switching determination step (S605), and a status maintenance step (S607).

When the contact point A is switched, the indoor unit pump OFF and the outdoor unit pump ON (S602) are performed, and when the contact point B is switched, the indoor unit pump ON and the outdoor unit pump ON (S604), and when the contact point C is switched, the indoor unit pump ON and the outdoor unit pump OFF ( S606).

This causes the indoor unit pump to be turned off so that only the outdoor unit is sprayed when the contact point A occurs because the solution contacts electrode A, and the indoor unit pump is also operated when the solution stabilizes at a level away from electrode B. If the solution falls from electrode C, stop the outdoor unit pump to raise the level.

7 is a flow chart illustrating winter level control of a combined heat pump according to the present invention.

Level control in winter is -10 ℃ or less determination step (S701), A contact switching determination step (S703), B contact switching determination step (S705), C contact switching determination step (S707) and status maintenance step (S709) It is configured to include.

First, it is determined whether the outside temperature is -10 ° C or less, and when the temperature drops below that, only the outdoor unit pump is operated (S702). Humidification is not possible at outside air temperature below -10 ℃, so spraying only the outdoor unit to prevent frost.

Next, when the contact point A is switched, the indoor unit pump ON and the outdoor unit pump OFF (S704) are performed. When the contact point B is switched, the indoor unit pump ON and the outdoor unit pump ON (S706), and the C contact point is switched, the indoor unit pump OFF and the outdoor unit. The pump is turned on (S708).

When contact point A occurs when electrode A comes into contact with the solution, the outdoor unit pump is turned off so that only the indoor unit is sprayed with the solution. When the solution is separated from electrode B and the level is stabilized, the outdoor unit pump also works together. If the solution falls from electrode C, stop the indoor unit pump to raise the level.

It looks at the operation of the combined heat pump according to an embodiment of the present invention having the configuration as described above.

The summer driving process is as follows.

First, referring to the operation of the outdoor unit side, the solution pump is operated to extract the solution of the outdoor unit storage unit, circulate the solution to the outdoor unit heat exchanger, and turn on the valve 7 to spray the solution on the upper heat exchanger to perform regeneration. Thereafter, the valve 3 is turned on to send a part of the regenerated agricultural solution to the indoor unit storage unit. The agricultural solution introduced into the indoor unit storage is used for dehumidification after mixing. During this operation, the valve 5 is turned off to prevent the solution from being sprayed on the lower heat exchanger for smooth refrigerant condensation.

Looking at the operation of the indoor unit in the summer, the solution pump is operated to extract the solution from the indoor unit reservoir to circulate the solution toward the indoor unit heat exchanger, and turn on the valves (6, 8) to spray the upper and lower heat exchangers to perform dehumidification. . At this time, the valve 4 is turned off to prevent the dehumidifying part rare solution from flowing into the outdoor unit storage part. The solution level of the solution reservoir that absorbs the moisture in the air rises, and the level is maintained by the pressure equalizing tube.

During summer operation, there is an effect of sterilization by dehumidification and dehumidification solution at the same time as cooling.

Looking at the operation of the outdoor unit during the winter operation, by turning on the valve (5,7) during the solution circulation by the solution pump to spray the upper and lower heat exchanger to prevent dehumidification and frost at subzero temperatures. At this time, the valve 3 is turned off to prevent the outdoor unit diluent from flowing into the indoor unit solution storage unit. The solution level of the solution reservoir that absorbs the moisture in the air rises, and the level is maintained by the pressure equalizing tube. The frost protection prevents the system from operating below freezing temperatures.

Looking at the operation of the indoor unit side, the solution is sprayed to the upper heat exchanger by turning on the valve (8) during the solution circulation to perform regeneration. At this time, the valve 4 is turned on to send a part of the regenerated agricultural solution to the outdoor unit storage. The agricultural solution introduced into the outdoor unit storage is used for dehumidification and frost prevention after mixing. During this operation, the valve 6 is turned off to prevent the solution from being sprayed on the lower heat exchanger for smooth refrigerant condensation.

During winter operation, humidification and outdoor unit frost protection are provided at the same time as heating.

As described above, in the combined heat pump according to the present invention, by installing a two-stage solution support so that the incoming air does not come into contact with the hot solution, sufficient condensation occurs in the condenser, thereby improving cooling or heating efficiency and using the heat of condensation of the refrigerant. Efficient solution regeneration effect.

In addition, there is an effect that a level controller that can adjust the solution level of the solution reservoir is installed to maintain an appropriate level.

In addition, during the summer operation, there is an effect of sterilization by the dehumidification and dehumidification solution at the same time cooling, and during the winter operation there is an effect of preventing the humidification and outdoor unit frost generated at the same time with heating.

In the detailed description of the present invention as described above, specific embodiments have been described, but various modifications are possible without departing from the scope of the present invention. Therefore, the scope of the present invention should not be limited to the described embodiments, but should be defined by the claims below and equivalents thereof.

1 is a summer schematic diagram of a combined heat pump according to the present invention,

2 is a winter schematic diagram of the combined heat pump according to the present invention,

3 is a block diagram showing an air flow path of a combined heat pump according to the present invention,

4 is a perspective view of the solution support used in the combined heat pump according to the present invention,

5 is a block diagram showing the configuration of the level controller used in the combined heat pump according to the present invention,

6 is a flowchart illustrating summer level control of a combined heat pump according to the present invention;

7 is a flow chart illustrating winter level control of a combined heat pump according to the present invention.

<Explanation of symbols for the main parts of the drawings>

5,6,7,8 Valve 14: Outdoor unit pump

15: indoor unit pump 16: four-way valve

20: outdoor unit 21, 41: upper heat exchanger

22,42: Lower heat exchanger 23,43: Upper solution distributor

24,44: Lower solution distributor 25,45: Solution support

26,46: exhaust fan 29,49: air inlet

30,50: solution storage

Claims (9)

In a combined heat pump in which a refrigerant compression cycle consisting of a compressor, a condenser, an expansion valve, and an evaporator, and a dehumidification cycle consisting of a regenerator and a dehumidifier are integrally combined, An indoor air inlet 49 is provided at one side of the lower side, and an indoor air outlet and a discharge fan 46 are provided at the upper side thereof, and an air flow path is formed, and a solution storage unit 50 is formed below the indoor air inlet. The upper and lower heat exchangers 41 and 42 are installed at the inner upper end of the tank, and the upper and lower solution distributors 43 and 44 are installed at the upper side of the upper and lower heat exchangers, respectively. An indoor unit 40 in which a solution support 45 is installed between the gas and the lower solution distributor; An outdoor air inlet 29 is provided at one side of the lower side, and an outdoor air outlet and a discharge fan 26 are provided at the upper side thereof, and an air flow path is formed, and a solution storage unit 30 is formed below the outdoor air inlet. The upper and lower heat exchangers 21 and 22 are installed on the inner upper end of the tank, and the upper and lower solution distributors 23 and 24 are respectively installed on the upper and lower heat exchangers. An outdoor unit 20 in which a solution support 25 is installed between the gas and the lower solution distributor; An indoor unit pump 15 and an outdoor unit pump 14 installed between the solution reservoir and the solution distributor; A four-way valve (16) installed between the compressor and the upper heat exchanger; And a valve (5, 6, 7, 8) installed at a point where the discharge pipes of the indoor unit pump and the outdoor unit pump and the upper and lower solution distributors meet. The method according to claim 1, Valves 3 and 4 are installed at the outlets of the indoor unit pump and the outdoor unit pump, respectively, and the indoor unit side valve 4 is the solution storage unit 30 of the outdoor unit, and the outdoor unit side valve 3 is the solution storage unit of the indoor unit. Combination heat pump, characterized in that connected to the 50 and the pipe (3 ', 4'). The method according to claim 2, The solution support (25, 45) is formed to be inclined complex heat pump, characterized in that installed divided into two upper and lower stages. The method according to claim 3, The combined heat pump includes a level controller (51) for operating the indoor unit pump and the outdoor unit pump according to the level of the indoor unit solution storage unit. The method according to claim 3 or 4, The upper heat exchanger (21, 41) is a combined heat pump, characterized in that to form a lower width and height than the lower heat exchanger (22,42). The method according to claim 3 or 4, The accumulator (17) is included between the four-way valve (16) and the upper heat exchanger (21, 41). The method according to claim 6, Combined heat pump, characterized in that the solution filter 18 is included between the indoor unit pump (15) and the valve (4). The method according to claim 6, The combined heat pump is a combined heat pump, characterized in that it comprises a pressure equalizing pipe (10) connecting the indoor unit storage unit and the outdoor unit storage unit. The method according to claim 6, Combination heat pump, characterized in that the filter is included inside the grill of the discharge fan outlet.