KR19980067581A - Cooling heating system with combined air heat source heat pump - Google Patents

Abstract

The present invention relates to a cooling / heating system using a complex air heat source heat pump that enables air conditioning of cooling, heating, dehumidification, and humidification of a building as a single device, and a disadvantage of the conventional air heat source heat pump. By actively modifying and supplementing the advantages of air heat source heat pump and the dehumidifier using liquid dehumidifier, it is possible to perform cooling and dehumidification, heating and humidification as a single device, and at the same time, to compact the composite device, It also additionally relates to a system which also enables the use of the properties of a liquid dehumidifier to perform an air cleaning effect.

Description

Cooling heating system with combined air heat source heat pump

The present invention relates to a cooling / heating system using a complex air heat source heat pump that enables air conditioning of building cooling, heating, dehumidification, and humidification with a single device. Combining the advantages of the dehumidifier using a dehumidifier relates to a cooling and heating system using a combined air heat source heat pump that can simultaneously perform cooling and dehumidification, heating and humidification, and compactly manufactured and supplied.

In general, an air heat source heat pump is composed of a compressor, an evaporator, and a four-way valve.In summer, an indoor unit (evaporator) is used for cooling a building.In winter and spring and autumn, four-way valves are used to change the function of the indoor and outdoor units to change the function of an outdoor unit. It is an air conditioner heat source device that can be used for heating indoors by taking heat away from the outside air by using evaporation of the refrigerant in the evaporator and radiating it in the indoor unit (condenser).

Such an air heat source heat pump is operated as a cooler (air conditioner) in summer as a single device, and has the advantage that it can be operated as a heater (heater) in the same cycle as an adjustment of a four-way valve in winter.

However, the above air heat source heat pump has a problem in that when the outside air temperature is lowered to 0 ° C. or less, frost is formed on the surface of the outdoor unit (evaporator), where moisture in the outside air condenses and grows.

Therefore, by operating an electric heating line, a hot gas defrosting cycle (Defrosting Cycle), there was a problem that the heating cycle is started again after melting frost.

In addition, the normal defrost cycle is an inefficient cycle of wasting about 15% of the energy, there is a problem that the application range of the air heat source heat pump is limited to only the case where the outside temperature 0 ℃ or more.

Therefore, in order to use the energy efficiently in the air heat source heat pump even when the outside air temperature is 0 ° C. or less in winter, it is an important problem to solve the problem of frost growth generated in the outdoor unit (evaporator).

Liquid desiccant dehumidifiers used to remove moisture from the air using liquid dehumidifiers are eliminators to prevent losses due to scattering of dehumidifiers, regenerators, solution heat exchangers, solution pumps, solution distributors and liquid desiccants into the air It consists of.

This liquid desiccant dehumidifier is in direct contact with air in the dehumidifying part of the apparatus by using liquid desiccants such as aqueous lithium chloride solution, triethylene glycol solution, calcium chloride solution and lithium bromide solution which have a very high affinity for moisture in the air. To remove moisture from the air.

The operation of the liquid desiccant dehumidifier is the mass transfer driving force of water absorption or discharge of the partial pressure difference between the liquid desiccant and the submersible in the air, and the vapor pressure of the liquid desiccant depends on the temperature and concentration of the solution. In addition, the liquid desiccant is also an antifreeze capable of absorbing moisture without freezing even below -30 ℃ depending on the concentration.

In order to improve the system efficiency of the dehumidifier by improving the heat and mass transfer ability of the dehumidifying unit to remove moisture, it is important to increase the contact area and the contact time of the air and the liquid desiccant, and the latent heat of condensation generated when water is absorbed into the liquid desiccant. Isothermal dehumidification through the removal of absorbed heat, etc. plays an important role in improving the efficiency of the dehumidifier system.

The dehumidifying liquid absorbed by water is heated by using steam, heat, solar heat, etc. in the regeneration unit of the dehumidifier to release the moisture to the regenerated air, so that it can be converted into a concentrated solution and reused. As a renewable energy source used for regeneration, it is possible to utilize arrangement, solar heat, etc., and to reduce the operating cost of the dehumidifier using the liquid desiccant.

Currently, liquid desiccant dehumidifiers are widely used in industrial high temperature applications requiring precise humidity control or low humidity.

The present invention has been made in consideration of the above circumstances, and a first object thereof is to combine the advantages of an air heat source heat pump and a dehumidifier using a liquid dehumidifier to simultaneously perform cooling, dehumidification, heating and humidification. It is to provide a cooling and heating system using a combined air heat source heat pump.

It is a second object of the present invention to provide a cooling / heating system using a complex air heat source heat pump that can be manufactured and supplied in a compact form.

The present invention is to provide a condenser having a heating mode and an evaporator having a cooling mode installed in the indoor unit, to achieve the above object, the outdoor unit is a refrigerant compression provided with a condenser provided with an evaporator and a cooling mode equipped with a heating mode The cycle and the indoor unit are provided with a regenerator with a heating mode and a dehumidifier with a cooling mode, and the outdoor unit is provided with a dehumidifier with a heating mode and a regenerator with a cooling mode, and a solution heat exchanger between the indoor and outdoor air units. Is combined with the liquid dehumidification cycle in which the solution distributor and the solution pump are installed in the indoor and outdoor air, and the combined air heat source heat pump enables evaporation, dehumidification, condensation and regeneration to one indoor and outdoor units. It is achieved by providing a cooling and heating system.

1 is an overall configuration diagram of the present invention,

2 is an overall flowchart of the cooling mode operation according to the present invention;

3 is an overall flowchart of the heating mode of operation according to the present invention.

Explanation of symbols on the main parts of the drawings

1 ... compressor 2 ... four-way valve

3 ... outdoor unit 4 ... expansion valve

5 ... indoor unit 6 ... solution heat exchanger

7, 8 ... solution distributor 9, 23 ... solution pump

10, 11 ... Eliminator 14 ... Piping

12, 15, 16 ... refrigerant line 17, 18, 19, 20 ... solution line

21, 22 ... reservoir

Next, embodiments of the present invention will be described in detail with reference to the drawings.

1 to 3 illustrate a cooling and heating system using a combined air heat source heat pump according to the present invention. The cooling and heating system using the combined air heat source heat pump includes a compressor (1) for making a refrigerant into a gas of high temperature and high pressure. ) And the four-way valve 2 and the indoor unit 5 are provided with a condenser having a heating mode and an evaporator having a cooling mode, and the outdoor unit 3 is provided with an evaporator having a heating mode and a condenser having a cooling mode. The refrigerant compression cycle, and the indoor unit 5 is provided with a regenerator having a heating mode and a dehumidifier having a cooling mode, and the outdoor unit 3 is provided with a dehumidifier having a heating mode and a regenerating device having a cooling mode. Liquid dehumidifier with a solution heat exchanger (6) installed between the indoor and outdoor air and a solution distributor (7, 8) and a solution pump (9, 23) installed inside and outside the room. Be greater combined integrally, respectively to be one of the indoor unit 5 and the outdoor unit 3 to perform the evaporation and condensation and dehumidification and regeneration.

2 shows a flow diagram of the refrigerant and the dehumidifying liquid flow in the cooling operation. The refrigerant compressed by the high temperature and high pressure in the compressor 1 passes through the four-way valve 2 through the refrigerant pipe 12 and then the pipe 13. It enters the outdoor unit (3) through the cooling and condensed by the dehumidifying liquid and the outside air, passes through the expansion valve (4) through the pipe (14), depressurizes and evaporates in the indoor unit (5) while heat from the dehumidifying liquid and the process air Taken away, after passing through the four-way valve (2) through the refrigerant pipe (15) enters the compressor (1) to achieve a cooling cycle.

During this cooling cycle, the surface of the heat exchanger of the indoor unit 5, which is the evaporator of the air heat source heat pump, is wetted with the dehumidifying solution dispersed in the solution distributor 7, and absorbs moisture in the air while contacting the process air to dehumidify the air. At the same time, sensible cooling by the evaporation of the refrigerant is also accompanied, so that absorption absorption dehumidification and sensible cooling are performed at the same time.

The dehumidified and cooled process air is sent to the air-conditioned room after completely removing the dehumidifying solution scattered from the eliminator (11).

The dehumidifying solution absorbed by water is collected in the ash storage tank 21, and is passed from the regenerator 3 (outdoor device) while passing through the solution heat exchanger 6 through the solution pump 23 and the solution piping 19. Preheating while preheating the regenerated agricultural solution of the present invention increases the energy efficiency, and is then sprayed from the regenerator 3 [regenerator] by the rare solution distributor 8 via the solution piping 20 and heated by the condensation arrangement of the refrigerant. As the vapor pressure of the solution is increased, moisture is regenerated by the contacting regenerated air, and the regenerated air is heated and the regenerated regenerated air is discharged outside, and the concentrated solution is collected in the concentrate storage tank 22.

The regenerated concentrate is pumped by the solution pump 9 and passed through the solution heat exchanger 6 through the solution pipe 17 to be pre-cooled by heat exchange with a low temperature rare solution from the dehumidifier 5 [indoor]. Then, it is sent to the concentrate distributor 7 through the solution pipe 18 and used in the dehumidifier 5 (indoor).

Therefore, when operating in a cooling cycle, the treatment of moisture in the air, that is, latent heat load (dehumidification), is efficiently carried out as a liquid desiccant dehumidifier, and at the same time, the sensible heat load is performed by evaporation of the refrigerant in the evaporator. As in the case of processing, cooling condensation dehumidification below the dew point temperature lower than the comfort temperature is unnecessary, and the cooling cycle is operated at a high evaporator temperature, thereby increasing the cooling cycle efficiency.

In addition, the bactericidal effect in the air, which is a side effect of the dehumidification solution, can be obtained.

In addition, the energy consumption cost can be reduced by using the condenser arrangement of the compression cycle for the desiccant regeneration heat source which is a heating source required for the desiccant dehumidifier.

3 shows a flow diagram of a refrigerant and a dehumidifying solution flow when operating in a winter heating mode, in which the high temperature and high pressure refrigerant exiting the compressor 1 passes through a valve 2 through a refrigerant pipe 12. Then, the condenser 5 enters the condenser 5 through the pipe 15 to the indoor unit 5 to heat the process air, regenerate the dehumidifying liquid, and humidify the process air.

The refrigerant passes through the expansion valve (4), enters the outdoor unit (3 [evaporator and dehumidifier]) through the refrigerant pipe 14, takes heat from the dehumidification solution scattered on the outside air and the heat exchanger surface, and evaporates the refrigerant. Passing the four-way valve (2) through (13) and then entering the compressor (1) through the refrigerant pipe (16), a refrigerant compression heating cycle is achieved.

In the heating mode, the indoor unit 5 serves as a condenser in the compression cycle and a regenerator in the liquid dehumidification cycle, thereby also acting as a humidifier in the indoor treatment air which is easy to dry by simple heating in winter. As in the air sterilization effect by the dehumidification solution also has the advantage that can be expected.

However, a very small carry-over problem caused by the contact of the heated dry solution with the process air can be recovered and reused in the dehumidification cycle through the efficient operation of the eliminator.

In the heating mode, the outdoor unit (3) compression cycle acts as an evaporator and frost generation problems occurring below 0 ° C are prevented by the dehumidification and antifreeze effects of the dehumidifying solution scattered on the surface of the heat exchanger, improving the shortcomings of the simple air heat source heat pump system. You can do it.

Next, the effects will be described with reference to FIGS. 2 and 3.

When cooling the air heat source heat pump, the indoor unit is used as a dehumidifier and the outdoor unit is used as a regenerator. When heating, the indoor unit is used as a humidifier (regenerator) and the outdoor unit can be used as a dehumidifier. It is not a simple combination of liquid desiccant dehumidifier, but the compact system of compact system is achieved through dual use of evaporator and condenser respectively for two purposes.In summer, the indoor unit (evaporator) is used for efficient latent heat load treatment of liquid desiccant and efficient for evaporator. Energy efficiency is improved by utilizing sensible heat treatment, and condensation arrangement of outdoor unit is used as regeneration heat source of desiccant to reduce energy consumption of system. In winter, liquid desiccant having antifreeze properties is spread on outdoor unit surface. Due to moisture in the air By preventing the re-created, by the need for an air disadvantage of the defrost cycle of the heat source heat pump, to increase the energy efficiency.

At this time, the absorbed moisture in the indoor unit (condenser) through the discharge of the desiccant to the room through the multipurpose characteristics that can also act as a winter humidifier.

In addition, as has been proved academically, the liquid desiccants used in the past have a sterilizing effect to remove bacteria in the air upon contact with air, so that in the summer, efficient cooling and dehumidification and air cleaning effect can be obtained. In winter, heating and humidification can be obtained at the same time.

Claims (5)

Cooling and heating system using a combined air heat source heat pump; a) a compressor and a four-way valve for making the refrigerant into a gas of high temperature and high pressure; b) a refrigerant compression cycle in which the indoor unit is provided with a condenser having a heating mode and an evaporator having a cooling mode, and the outdoor unit is provided with a condenser having an evaporator and a cooling mode; c) In addition, the indoor unit is provided with a regenerator with a heating mode and a dehumidifier with a cooling mode, and the outdoor unit is provided with a dehumidifier with a heating mode and a regenerator with a cooling mode, and a solution heat exchanger is installed between the indoor and outdoor air units. At the same time, the liquid dehumidification cycle in which the solution distributor and the solution pump are installed in the indoor and outdoor air is integrated. d) Evaporation and dehumidification, condensation and regeneration are carried out to one indoor unit and one outdoor unit, respectively. The method of claim 1; In the cooling mode, the compression cycle of the indoor unit is started by the evaporator, the dehumidification solution cycle by the dehumidifier, the compression cycle of the outdoor unit is operated by the condenser, the dehumidification cycle by the regenerator, the absorption dehumidification and sensible cooling are operated simultaneously and the condenser is dehumidified Cooling and heating system using a combined air heat source heat pump, characterized in that to perform the regeneration of. The method of claim 1; In the heating mode, the compression cycle of the indoor unit is operated by the condenser and the dehumidification solution cycle by the regenerator, and the compression cycle of the outdoor unit is operated by the evaporator and the dehumidification solution cycle by the dehumidifier to simultaneously perform heating and humidification. Cooling and heating system using a combined air heat source heat pump, characterized in that to prevent the formation of frost by the absorption of outside air. The method of claim 1; The dehumidifying solution is a triethylene glycol, lithium chloride aqueous solution, a liquid desiccant mixed solution, characterized in that the cooling and heating system using a combined heat source heat pump. The method of claim 1; The indoor and outdoor air are respectively connected to a solution heat exchanger with a solution distributor, a dehumidifying solution, an air contactor and a solution reservoir are installed, and an eliminator is installed on one side to recover the dehumidifying solution scattered in the processing air, and a dehumidifying solution. Cooling heating system using a combined air heat source heat pump, characterized in that the falling liquid film to wet the air contactor surface to increase the heat and mass transfer efficiency.