Heating / cooling heat pump system with dehumidification unit inside indoor unit, and its controlling method

Abstract

To provide a heat pump system and its control method.SOLUTION: A heat pump system comprises a cooling line 100 and a dehumidifying line 200. The system is configured upon switching of a control unit 400 into: a cooling mode, a dehumidifying valve 230 is closed and a cooling / heating valve 60 is opened; a dehumidifying mode, the dehumidifying valve 230 is opened and the cooling / heating valve 60 is closed; and a cooling and dehumidifying mode, the dehumidifying valve 230 is opened and the cooling / heating valve 60 is also opened. The system is further configured such that a refrigerant discharged from a compressor 10 is distributedly supplied to the cooling line 100 and the dehumidifying line 200 at a preset ratio, is caused to flow alternately from the cooling line and the dehumidifying line into a liquid receiver separator 80 provided at the front end of the compressor to be circulated to the compressor 10.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a cooling / heating heat pump system equipped with a dehumidifying unit in an indoor unit, and a control method thereof, which has a system that performs dehumidification separately or simultaneously during cooling operation and heating operation, and which has a dehumidifying heat exchanger in the indoor unit separate from normal refrigerant cycle operation, and a control method thereof. [Background technology]

[0002] Generally, a heat pump is a heating and cooling device that uses the heat of heat or condensation of a refrigerant to convert a low-temperature heat source into a high-temperature one, or vice versa. Heat pumps are classified into electric and engine-powered types depending on the drive system, and most heat pumps today are configured to perform both heating and cooling functions.

[0003] Such a heat pump type air conditioner is composed of a cooling cycle including a compressor, a condenser, an expansion valve, and an evaporator, and performs heating and cooling by operating the condenser as an evaporator and the evaporator as a condenser in reverse using a four-way valve or an electronic valve.

[0004] These heat pump-based air conditioning and heating systems are used for heating and cooling in various facilities, as well as in agricultural cultivation facilities for fruits, vegetables, and specialty crops to appropriately control cultivation temperatures and optimize cultivation conditions.

[0005] However, conventional air conditioners using heat pumps have poor humidity control capabilities, so when they are applied to agricultural cultivation facilities, which are sensitive not only to temperature control but also to humidity control, a separate dehumidifier must be installed.

[0006] Furthermore, these conventional dehumidifying and heating devices have low heating, cooling, and dehumidifying efficiency due to refrigerant shortages caused by refrigerant condensation in the cold winter and refrigerant saturation in the hot summer. As a result, additional operation of the air conditioner is required in the summer, and separate operation of the electric heater and warm air blower is required in the winter, which is inconvenient and requires high installation costs.

[0007] Furthermore, in the summer, the cold water supplied from the heating and cooling load pump cools and dehumidifies the air ventilated into the greenhouse through the hot and cold water heat exchanger. However, in the case of a typical cultivation greenhouse, the humidity load is much higher than in a typical air-conditioned space, so a large amount of dehumidification is required. However, when a large amount of dehumidification is performed, not only the temperature but also the humidity decreases in the hot and cold water heat exchanger, resulting in the temperature of the air supplied to the greenhouse becoming excessively low.

[0008] Supplying air into a greenhouse at a temperature that is excessively lower than the average temperature inside the greenhouse can result in undesirable results such as poor crop growth and poor flowering.

[0009] However, if the temperature difference between ventilation and supply air is reduced to prevent such poor growth and flowering, a very large amount of air must be circulated to cover the greenhouse's cooling load, which requires larger air conditioner fans and greater fan power. Furthermore, if the air rotation speed is too fast, a large amount of air bypasses the hot and cold water heat exchanger, shortening the time for condensation to form on the coil, which has the disadvantage of preventing proper dehumidification. [Prior art documents] [Patent documents]

[0010] [Patent Document 1] Korean Patent No. 10-133646 [Patent Document 2] Korean Patent Registration No. 10-2021525 [Patent Document 3] Korean Patent Registration No. 10-2050694 Summary of the Invention [Problem to be solved by the invention]

[0011] The present invention has been devised to solve the above-mentioned problems, and its object is to provide a system that performs heating / cooling operation and dehumidifying operation separately or simultaneously, thereby increasing the efficiency of the dehumidifying operation and increasing the amount of dehumidification, and to provide a heating / cooling system and a control method thereof that do not require a separate dehumidifier. [Means for solving the problem]

[0012] The present invention is a means for solving the above-mentioned problems, and provides a heat pump system and a control method thereof, in which a high-temperature, high-pressure refrigerant discharged from the discharge side of a compressor passes through a four-way valve, an outdoor unit, and a first expansion valve in this order to become a low-temperature, low-pressure refrigerant, passes through an indoor heat exchanger installed in an indoor unit, flows into the four-way valve, and is circulated to the suction side of the compressor again in a cooling line; and the high-temperature, high-pressure refrigerant discharged to the discharge side of the compressor is discharged into a dehumidification line formed between the discharge side and the four-way valve, and the high-temperature, high-pressure refrigerant that has passed through an upper refrigerant line of a dehumidifying heat exchanger that is installed parallel to and spaced apart from the lower part of the indoor heat exchanger of the indoor unit passes through a second expansion valve to become a low-temperature, low-pressure refrigerant, flows into the lower refrigerant line of the dehumidifying heat exchanger again, and the refrigerant that has passed through the suction side of the compressor is and a dehumidifying line through which refrigerant is circulated to the compressor, wherein when the control unit switches to a cooling mode, a dehumidifying valve formed in the dehumidifying line on the discharge side of the compressor is closed and a cooling / heating valve is opened, and when the control unit switches to a cooling / dehumidifying mode, the dehumidifying valve formed in the dehumidifying line on the discharge side of the compressor is opened and the cooling / heating valve is closed, and when the control unit switches to a cooling / dehumidifying mode, the dehumidifying valve formed in the dehumidifying line on the discharge side of the compressor is opened and the cooling / heating valve is also opened, and the refrigerant discharged from the compressor is distributed and supplied to the cooling line and the dehumidifying line at a preset ratio, and flows reciprocally into a liquid receiver separator provided at the front end of the compressor and circulated to the compressor, and a control method thereof. [Effects of the Invention]

[0013] As described above, the present invention has the effect of facilitating the control of the cooling and heating operation and the dehumidifying operation and increasing the efficiency of the dehumidifying operation by performing the cooling and heating operation and the dehumidifying operation separately or simultaneously.

[0014] In addition, the present invention provides an operating system with a large dehumidification capacity, eliminating the need for a separate dehumidifier.

[0015] Furthermore, in order to prevent a sudden drop in heating efficiency due to a decrease in efficiency and heat quantity caused by defrosting of the evaporator of the outdoor heat exchanger in winter, a reheat pipe is used to supply heat to the reheat pipe in multiple stages depending on the degree of defrosting and the degree of decrease in efficiency of heating operation, thereby enabling normal operation. [Brief explanation of the drawings]

[0016] [Figure 1] 1 is a schematic diagram showing a cooling heat pump system provided with a dehumidifying unit in an indoor unit according to the present invention. [Figure 2] 1 is a schematic diagram showing a heating heat pump system provided with a dehumidifying unit in an indoor unit according to the present invention. [Figure 3] 1 is a schematic diagram showing a reheat pipe of a cooling and heating heat pump system having a dehumidifying unit in an indoor unit according to the present invention. [Figure 4] 1A and 1B are schematic diagrams showing the refrigerant passage of an outdoor heat exchanger of a cooling and heating heat pump system provided with a dehumidifying unit in an indoor unit according to the present invention. [Figure 5] 3 is a flowchart showing heating / cooling, dehumidification, and defrosting control according to a control method for a heat pump having a dehumidification unit in an indoor unit according to the present invention. [Figure 6] 1 is a schematic diagram showing a method for controlling a heat pump having a dehumidifying unit in an indoor unit according to the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0017] Before describing some embodiments of the present invention in detail, it should be understood that the details of construction and arrangement of components set forth in the following detailed description or illustrated in the drawings are not intended to limit its application. The present invention can be embodied and practiced in other embodiments and may be carried out in various ways. It should also be understood that the expressions and terms used herein with respect to terms such as device or element orientation (e.g., "front," "back," "up," "down," "top," "bottom," "left," "right," "lateral") are used solely to simplify the description of the present invention and do not imply or indicate that the associated device or element must have a particular orientation. Furthermore, terms such as "first," "second," and the like are used in the present specification and appended claims for descriptive purposes only and are not intended to imply or indicate relative importance or intent.

[0018] In order to achieve the above object, the present invention has the following features.

[0019] Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. Before that, the terms and words used in the specification and claims should not be interpreted as being limited to their ordinary or dictionary meanings, but should be interpreted as meanings and concepts that correspond to the technical idea of ​​the present invention, based on the principle that an inventor can appropriately define the concept of a term to best describe his / her invention.

[0020] Therefore, it should be understood that the embodiments described in this specification and the configurations shown in the drawings are merely the most preferred embodiments of the present invention and do not represent all of the technical ideas of the present invention, and that there may be various equivalents and modifications that can replace them at the time of this application.

[0021] Considering the embodiments according to the present invention: In a heat pump system, A high-temperature, high-pressure refrigerant discharged from the discharge side 11 of the compressor 10 passes through a four-way valve 20, an outdoor unit 30, and a first expansion valve 40 in this order to become a low-temperature, low-pressure refrigerant, which then flows into the four-way valve 20 via an indoor heat exchanger 51 installed in the indoor unit 50, and is then circulated again to the suction side 12 of the compressor 10 in a cooling line 100; The high-temperature, high-pressure refrigerant discharged from the discharge side 11 of the compressor 10 is discharged into a dehumidification line 200 formed between the discharge side 11 and the four-way valve 20, and the high-temperature, high-pressure refrigerant that has passed through an upper refrigerant line 210a of a dehumidifying heat exchanger 210 that is installed parallel to and spaced apart from the lower part of the indoor heat exchanger 51 of the indoor unit 50 passes through a second expansion valve 220 to become a low-temperature, low-pressure refrigerant and then flows into a lower refrigerant line 210b of the dehumidifying heat exchanger 210 again. The passed refrigerant is circulated to the compressor 10 via the suction side 12 of the compressor 10. The indoor air flowing into the front of the indoor unit 50 is cooled and dehumidified when passing through the heat exchanger of the lower refrigerant line 210b of the dehumidifying heat exchanger 210, and the air temperature of the cooled and dehumidified air increases when passing through the heat exchanger of the upper refrigerant line 210a. Then, the cooled and dehumidified air passes through the indoor heat exchanger 51 and is cooled and dehumidified before being supplied to the room. When the control unit 400 switches to the cooling mode, the dehumidification valve 230 formed in the dehumidification line 200 on the discharge side 11 of the compressor 10 is closed, and the cooling / heating valve 60 is opened. When the mode is switched to the dehumidification mode, the dehumidification valve 230 formed in the dehumidification line 200 on the discharge side 11 of the compressor 10 is opened, and the cooling / heating valve 60 is closed. When the mode is switched to the cooling and dehumidifying mode, the dehumidifying valve 230 formed in the dehumidifying line 200 on the discharge side 11 of the compressor 10 is opened, and the cooling and heating valve 60 is also opened. The refrigerant discharged from the compressor 10 is distributed and supplied to the cooling line 100 and the dehumidifying line 200 at a preset ratio, and the refrigerant flows into a receiver separator 80 provided at the front end of the compressor 10, and is then circulated to the compressor 10. This relates to a heating / cooling heat pump system equipped with a dehumidifying unit in an indoor unit.

[0022] In addition, as another embodiment of the present invention, The high-temperature, high-pressure refrigerant discharged from the discharge side 11 of the compressor 10 passes through the four-way valve 20, an indoor heat exchanger 51 installed in the indoor unit 50, and a first expansion valve 40 in this order to become a low-temperature, low-pressure refrigerant, which then passes through the outdoor unit 30 and the four-way valve 20 in this order, and circulates again to the suction side 12 of the compressor 10. A plurality of reheat pipes 70 each equipped with an electric heater rod 71 are formed on the inlet side of the outdoor unit 30 of the heating line 300, and the surface temperature of the outdoor heat exchanger 31 of the outdoor unit 30 and the humidity temperature of the inflow air flowing into the outdoor unit 30 are measured. The control unit 400 determines whether to perform defrosting, and when the defrosting condition is met, the electric heater rod 71 is activated, and a plurality of the electric heater rods 71 ​​are selectively activated simultaneously. When the control unit 400 switches to the heating mode, the dehumidifying valve 230 formed in the dehumidifying line 200 on the discharge side 11 of the compressor 10 is closed, and the cooling / heating valve 60 is opened. When the mode is switched to the dehumidification mode, the dehumidification valve 230 formed in the dehumidification line 200 on the discharge side 11 of the compressor 10 is opened, and the cooling / heating valve 60 is closed. When the mode is switched to the heating / dehumidifying mode, the dehumidifying valve 230 formed in the dehumidifying line 200 on the discharge side 11 of the compressor 10 is opened, and the cooling / heating valve 60 is also opened. The refrigerant discharged from the compressor 10 is distributed and supplied to the heating line 300 and the dehumidifying line 200 at a preset ratio, and is mutually flowed into the receiver separator 80 provided at the front end of the compressor 10, so as to be circulated to the compressor 10.

[0023] Furthermore, as another embodiment of the present invention, The heat capacity of the dehumidifying heat exchanger 210 is smaller than that of the indoor heat exchanger 51 .

[0024] In addition, as another embodiment of the present invention, The number of refrigerant pipes forming the upper refrigerant line 210a functioning as a condenser of the dehumidifying heat exchanger 210 is greater than the number of refrigerant pipes forming the lower refrigerant line 210b functioning as an evaporator.

[0025] Furthermore, as another embodiment of the present invention, The outdoor heat exchanger 35 of the outdoor unit 30 has a plurality of refrigerant branch paths each including an upper path portion 35a, a middle path portion 35b, and a lower path portion 35c. The upper passage portion 35a allows the refrigerant to flow in from the top to form a preset refrigerant flow path, and then flows out from the top to the outdoor refrigerant liquid recovery portion 38 located at the outer lower portion of the outdoor heat exchanger 35. The central passage portion 35b allows the refrigerant to flow in from the central portion to form a preset refrigerant flow path, and then flows out from the central portion to the outdoor refrigerant liquid recovery portion 38. The lower passage portion 35c allows the refrigerant to flow in from the bottom to form a preset refrigerant flow path, and then flows out from the bottom to the outdoor refrigerant liquid recovery portion 38. The refrigerant mixed in the outdoor refrigerant liquid recovery section 38 flows into the outdoor heat exchanger 35 again, undergoes heat exchange, and then flows out of the outdoor heat exchanger 35 again.

[0026] In addition, as another embodiment of the present invention, 1. A method for controlling a heat pump, comprising: The indoor unit 50 is separately provided with an indoor heat exchanger 51 and a dehumidifying heat exchanger 210 attached to the lower part of the indoor heat exchanger 51 so as to correspond to the indoor heat exchanger 51 and be spaced apart from the indoor heat exchanger 51. a cooling line 100 and a heating line 300 connected to the outdoor heat exchanger 31 of the outdoor unit 30, and configured by connecting the indoor heat exchanger 51 and the outdoor heat exchanger 31 to each other; A control unit 400 for the cooling / heating heat pump is formed, which is composed of a dehumidifying line 200 consisting of an upper refrigerant line 210a that functions as a condenser in a dehumidifying heat exchanger 210 and a lower refrigerant line 210b that functions as an evaporator, in addition to the cooling line 100 and the heating line 300, The high-temperature, high-pressure refrigerant discharged from the discharge side 11 of the compressor 10 is discharged into a dehumidification line 200 formed between the discharge side 11 and the four-way valve 20. The high-temperature, high-pressure refrigerant passes through an upper refrigerant line 210a of a dehumidifying heat exchanger 210 installed parallel to and spaced apart from the lower part of the indoor heat exchanger 51 of the indoor unit 50. The high-temperature, high-pressure refrigerant passes through a second expansion valve 220 to become a low-temperature, low-pressure refrigerant and flows again into a lower refrigerant line 210b of the dehumidifying heat exchanger 210. The passed refrigerant is circulated to the compressor 10 via the suction side 12 of the compressor 10. The indoor air flowing into the front of the indoor unit 50 is cooled and dehumidified when passing through the heat exchanger of the lower refrigerant line 210b of the dehumidifying heat exchanger 210, and the air temperature of the cooled and dehumidified air increases when passing through the heat exchanger of the upper refrigerant line 210a. Then, the cooled and dehumidified air passes through the indoor heat exchanger 51 and is cooled and dehumidified before being supplied to the room. The control unit 400 is configured to receive the temperature and humidity measured in real time at the indoor supply destination, the surface temperature of the outdoor heat exchanger 31, and the humidity flowing into the outdoor heat exchanger 31, and control them to preset values. In the cooling operation mode, the dehumidifying line 200 is turned off, the indoor heat exchanger 51 is converted to an evaporator function, and the cooling line 100 is controlled to supply refrigerant to control the preset temperature and humidity of the indoor supply destination. In the dehumidification operation mode, the cooling line 100 and the heating line 300 are turned off, and the refrigerant is supplied to the dehumidification heat exchanger 210 to control the preset temperature and humidity of the indoor supply destination. In the heating operation mode, the dehumidification line 200 is turned off, the indoor heat exchanger 51 is converted to a condenser function, and the refrigerant is supplied to the heating line 300 to control the preset temperature and humidity of the indoor supply destination. In the simultaneous cooling and dehumidification operation mode, the cooling line 100 and the dehumidification line 200 are controlled to operate simultaneously. In the simultaneous heating and dehumidification operation mode, the heating line 300 and the dehumidification line 200 are controlled to operate simultaneously. The discharge side 11 of one compressor 10 constituting the heat pump is branched into two refrigerant supply lines, one of which is controlled to supply high-temperature, high-pressure refrigerant to the cooling line 100 and the heating line 300, and the other is controlled to supply high-temperature, high-pressure refrigerant to the dehumidification line 200 by controlling the opening and closing of each valve. The control unit 400 The surface temperature of the outdoor heat exchanger 31 and the humidity and temperature of the inflow air are measured to determine whether defrosting is necessary, and when the defrosting conditions are met, a plurality of reheat pipes 70 equipped with electric heater rods 71 ​​installed on the inflow side of the outdoor unit 30 are selectively operated simultaneously. The control unit 400 In the simultaneous cooling and dehumidification operation mode and the simultaneous heating and dehumidification operation mode, The present invention relates to a control method for a heating / cooling heat pump equipped with a dehumidifying unit in an indoor unit, which is configured to control and adjust the amount of refrigerant supplied from the discharge side 11 of the compressor 10 so as to reach a preset temperature and humidity based on the real-time temperature and humidity of the indoor supply destination.

[0027] Hereinafter, a cooling and heating heat pump system having a dehumidifying unit in an indoor unit and a control method thereof according to a preferred embodiment of the present invention will be described in detail with reference to FIGS.

[0028] FIG. 1 is a schematic diagram showing a cooling heat pump system equipped with a dehumidifying unit in an indoor unit according to the present invention. In the heat pump system, The high-temperature, high-pressure refrigerant discharged from the discharge side 11 of the compressor 10 passes through the four-way valve 20, the outdoor unit 30, and the first expansion valve 40 in that order to become a low-temperature, low-pressure refrigerant, which then flows into the four-way valve 20 via the indoor heat exchanger 51 installed in the indoor unit 50, and is then circulated back to the suction side 12 of the compressor 10 through the cooling line 100.Indoor air that has passed through the indoor heat exchanger 51 is cooled and dehumidified and supplied to the room, where the hot and humid indoor air is cooled and dehumidified.

[0029] Furthermore, a technical feature of the present invention is that a refrigerant system separate from the cooling line 100 is formed.

[0030] The high-temperature, high-pressure refrigerant discharged from the discharge side 11 of the compressor 10 is discharged into a dehumidification line 200 formed between the discharge side 11 and the four-way valve 20. The high-temperature, high-pressure refrigerant passes through an upper refrigerant line 210a of a dehumidifying heat exchanger 210, which is installed parallel to and spaced apart from the lower part of the indoor heat exchanger 51 of the indoor unit 50. The high-temperature, high-pressure refrigerant passes through a second expansion valve 220 to become a low-temperature, low-pressure refrigerant, and then flows into a lower refrigerant line 210b of the dehumidifying heat exchanger 210 again. The passed refrigerant is circulated to the compressor 10 via the suction side 12 of the compressor 10 through the dehumidification line 200.

[0031] Indoor air flowing into the front of the indoor unit 50 is cooled and dehumidified when passing through the heat exchanger of the lower refrigerant line 210b of the dehumidifying heat exchanger 210, and the air temperature of the cooled and dehumidified air increases when passing through the heat exchanger of the upper refrigerant line 210a, and then passes through the indoor heat exchanger 51 to be cooled and dehumidified before being supplied to the room.

[0032] In addition, when the temperature of the indoor air is sufficiently cooled but the humidity is high, the cooling line 100 stops operating and only the dehumidifying line 200 operates. To this end, a separate dehumidifying heat exchanger 210 is provided inside the indoor unit 50, and the dehumidifying heat exchanger 210 is characterized in that a high-temperature, high-pressure refrigerant line and a low-temperature, low-pressure refrigerant line passing through a second expansion valve 220 are integrated into one unit.

[0033] for that, In the present invention, when the control unit 400 switches to the cooling mode, the dehumidifying valve 230 formed in the dehumidifying line 200 on the discharge side 11 of the compressor 10 is closed, and the cooling / heating valve 60 is opened, so that the cooling operation is performed alone. When the dehumidification mode is switched to, the dehumidification valve 230 formed in the dehumidification line 200 on the discharge side 11 of the compressor 10 is opened, and the cooling / heating valve 60 is closed, so that the dehumidification operation is performed alone.

[0034] In addition, the present invention provides a cooling and dehumidifying operation that is performed simultaneously, When the mode is switched to the cooling / dehumidifying mode, the dehumidifying valve 230 formed in the dehumidifying line 200 on the discharge side 11 of the compressor 10 is opened, and the cooling / heating valve 60 is also opened, so that the refrigerant discharged from the compressor 10 is distributed and supplied to the cooling line 100 and the dehumidifying line 200 at a preset ratio, and is mutually flowed into the receiver separator 80 provided at the front end of the compressor 10, and is circulated to the compressor 10.

[0035] The indoor air passing through the dehumidifying heat exchanger 210 of the dehumidifying line 200 increases in temperature, and passes through the upper indoor heat exchanger 51 to be cooled and dehumidified.

[0036] This is characterized by its operation at a destination where temperature and humidity are to be precisely controlled simultaneously, such as a semiconductor device that precisely controls the temperature and humidity of indoor air.

[0037] To this end, the refrigerant discharged from the compressor 10 is distributed to the cooling line 100 and the dehumidifying line 200 at a preset ratio, and is supplied to the cooling line 100 and the dehumidifying line 200, respectively. The amount of refrigerant distributed is determined by measuring the temperature and humidity of the indoor air in real time, and the opening and closing degrees of the cooling / heating valve 60 and the dehumidifying valve 230 are automatically controlled so that the preset temperature and humidity are achieved.

[0038] FIG. 2 is a schematic diagram showing a heating heat pump system having a dehumidifying unit in an indoor unit according to the present invention, The present invention further includes a heating line 300 in which the high-temperature, high-pressure refrigerant discharged from the discharge side 11 of the compressor 10 passes through the four-way valve 20, the indoor heat exchanger 51 installed in the indoor unit 50, and the first expansion valve 40 in that order to become a low-temperature, low-pressure refrigerant, which then passes through the outdoor unit 30 and the four-way valve 20 in that order, and circulates back to the suction side 12 of the compressor 10. This heating line 300 reverses the refrigerant circulation direction of the cooling line 100.

[0039] When the control unit 400 of the present invention switches to the heating mode, the dehumidification valve 230 formed in the dehumidification line 200 on the discharge side 11 of the compressor 10 is closed and the heating / cooling valve 60 is opened, thereby increasing the temperature of the indoor air passing through the indoor heat exchanger 51 installed in the indoor unit 50 and providing the indoor air set as the indoor supply destination.

[0040] The technical feature of the present invention is that when the dehumidification mode is switched to, the dehumidification valve 230 formed in the dehumidification line 200 on the discharge side 11 of the compressor 10 is opened and the cooling / heating valve 60 is closed. This is an operation mode that is used in low-temperature, high-humidity supply destinations where humidity is high even in winter, and is necessary for indoor supply destinations where humidity is low and high, such as greenhouses where plants need to grow.

[0041] Furthermore, a technical feature of the present invention is that when the mode is switched to the heating and dehumidifying mode, the dehumidifying valve 230 formed in the dehumidifying line 200 on the discharge side 11 of the compressor 10 is opened, and the cooling and heating valve 60 is also opened. The refrigerant discharged from the compressor 10 is distributed and supplied to the heating line 300 and the dehumidifying line 200 at a preset ratio, and flows mutually into the receiver separator 80 provided at the front end of the compressor 10, and is circulated to the compressor 10.

[0042] For a low-temperature, high-humidity indoor environment, the temperature of indoor air passing through the dehumidifying heat exchanger 210 of the dehumidifying line 200 rises, and the air is cooled and dehumidified by passing through the upper indoor heat exchanger 51. This is characterized by its operation at a supply destination that precisely controls the temperature and humidity simultaneously, such as a semiconductor device that precisely controls the temperature and humidity of indoor air.

[0043] To this end, the refrigerant discharged from the compressor 10 is distributed to the cooling line 100 and the dehumidifying line 200 at a preset ratio, and is supplied to the cooling line 100 and the dehumidifying line 200, respectively. The amount of refrigerant distributed is determined by measuring the temperature and humidity of the indoor air in real time, and the opening and closing degrees of the cooling / heating valve 60 and the dehumidifying valve 230 are automatically controlled so that the preset temperature and humidity are achieved.

[0044] FIG. 3 is a schematic diagram showing a reheat pipe 70 of a heating and cooling heat pump system equipped with a dehumidification unit in an indoor unit according to the present invention. This relates to defrosting or superheat control of the outdoor unit 30. A plurality of reheat pipes 70 equipped with electric heater rods 71 ​​are formed on the inlet side of the heating line 300 to the outdoor unit 30. The surface temperature of the outdoor heat exchanger 31 of the outdoor unit 30 and the temperature and humidity of the inflow air flowing into the outdoor unit 30 are measured, and the control unit 400 determines whether to perform defrosting. When the defrosting conditions are met, the electric heater rods 71 ​​are activated, and a plurality of the electric heater rods 71 ​​are selectively activated simultaneously for rapid defrosting.

[0045] This includes defrosting operation of the outdoor unit 30, measuring the surface temperature of the outdoor heat exchanger 31, and if the temperature of the refrigerant flowing out of the outdoor unit 30 is lower than a preset refrigerant temperature, it is determined to be uncondensed refrigerant gas, and the electric heater rod 71 is operated so that the temperature is within a preset superheat range.

[0046] Furthermore, as another embodiment of the present invention, As shown in FIGS. 1 and 2, the dehumidifying heat exchanger 210 is formed to be smaller in size than the indoor heat exchanger 51. This indicates that the heat capacity of the indoor air that is heat exchanged by the indoor heat exchanger 51 is relatively smaller than the heat capacity by the dehumidifying heat exchanger 210.

[0047] In addition, as an embodiment, when both cooling and dehumidification or heating and dehumidification are operated, if the size of the dehumidifying heat exchanger 210 is smaller than that of the indoor heat exchanger 51, the first indoor air exiting from the outside of the dehumidifying heat exchanger 210 flows into the indoor heat exchanger 51, undergoes heat exchange, and passes through the indoor heat exchanger 51. The temperature of the indoor air passing through the dehumidifying heat exchanger 210 increases, and the second indoor air passing through the indoor heat exchanger 51 spaced above is mixed with the first indoor air and supplied to the indoor supply destination.

[0048] In another embodiment, when the size of the dehumidifying heat exchanger 210 and the size of the indoor heat exchanger 51 are equal, all of the indoor air that has passed through the dehumidifying heat exchanger 210 and whose temperature has increased passes through the indoor heat exchanger 51 and is supplied to the indoor supply destination.

[0049] Another technical feature of the present invention is: The dehumidification heat exchanger 210 of the dehumidification line 200, which performs the dehumidification function, is characterized in that the upper part functions as a condenser and the lower part functions as an evaporator. For dehumidification efficiency, the condenser configuration is formed to have a larger heat capacity than the evaporator configuration, and this usually has a relative heat capacity difference in the range of 1.3 to 1.4 times.

[0050] For this reason, the number of refrigerant pipes forming the upper refrigerant line 210a, which functions as a condenser, is greater than the number of refrigerant pipes forming the lower refrigerant line 210b, which functions as an evaporator. In one embodiment, the upper refrigerant line 210a is formed in two rows, and the lower refrigerant line 210b is formed in one row.

[0051] 4A and 4B are schematic diagrams showing the refrigerant path of an outdoor heat exchanger of a cooling and heating heat pump system having a dehumidifying unit in an indoor unit according to the present invention; This is a configuration for increasing the efficiency of the outdoor heat exchanger 35, and the refrigerant pipe flowing into the outdoor heat exchanger 35 is formed with multiple refrigerant flow paths, and after heat exchange inside, the refrigerant flows out of the outdoor heat exchanger 35, is mixed and stored, and then flows back into the outdoor heat exchanger 35 for heat exchange, so that all of the refrigerant that can be mixed into refrigerant gas and refrigerant liquid is heat exchanged into refrigerant gas.

[0052] To that end, the present invention provides: The outdoor heat exchanger 35 of the outdoor unit 30 has a plurality of refrigerant branch paths, each of which includes an upper path portion 35a, a middle path portion 35b, and a lower path portion 35c. The upper path portion 35a receives refrigerant from the top to form a preset refrigerant flow path, and the refrigerant flows out from the top to an outdoor refrigerant liquid recovery portion 38 located at the bottom outside the outdoor heat exchanger 35. The central passage portion 35b allows the refrigerant to flow in from the central portion to form a preset refrigerant flow path, and then flows out from the central portion to the outdoor refrigerant liquid recovery portion 38. The lower passage portion 35c allows the refrigerant to flow in from the bottom to form a preset refrigerant flow path, and then flows out from the bottom to the outdoor refrigerant liquid recovery portion 38. The refrigerant mixed in the outdoor refrigerant liquid recovery section 38 flows into the outdoor heat exchanger 35 again, undergoes heat exchange, and then flows out of the outdoor heat exchanger 35 again.

[0053] FIG. 5 is a flowchart showing heating / cooling, dehumidification, and defrosting control by a control method for a heat pump having a dehumidification unit in an indoor unit according to the present invention, and FIG. 6 is a schematic diagram showing a control method for a heat pump having a dehumidification unit in an indoor unit according to the present invention. 1 to 4 are schematic diagrams of a refrigerant system and a main configuration for the control method of the present invention, The present invention provides a heat pump control method, comprising: The indoor unit 50 is separately provided with an indoor heat exchanger 51 and a dehumidifying heat exchanger 210 attached to the lower part of the indoor heat exchanger 51 so as to correspond to the indoor heat exchanger 51 and be spaced apart from the indoor heat exchanger 51. a cooling line 100 and a heating line 300 connected to the outdoor heat exchanger 31 of the outdoor unit 30, and configured by connecting the indoor heat exchanger 51 and the outdoor heat exchanger 31 to each other; In addition to the cooling line 100 and the heating line 300, a control unit 400 for the cooling / heating heat pump is formed, which is composed of a dehumidifying line 200 consisting of an upper refrigerant line 210a that functions as a condenser in the dehumidifying heat exchanger 210 and a lower refrigerant line 210b that functions as an evaporator.

[0054] FIG. 1 is a schematic diagram showing a refrigerant system diagram for cooling and dehumidification according to a control method for a heat pump equipped with a dehumidifying unit in an indoor unit according to the present invention; In a heat pump system, The high-temperature, high-pressure refrigerant discharged from the discharge side 11 of the compressor 10 passes through the four-way valve 20, the outdoor unit 30, and the first expansion valve 40 in that order to become a low-temperature, low-pressure refrigerant, which then flows into the four-way valve 20 via the indoor heat exchanger 51 installed in the indoor unit 50, and is then circulated back to the suction side 12 of the compressor 10 through the cooling line 100.Indoor air that has passed through the indoor heat exchanger 51 is cooled and dehumidified and supplied to the room, where the hot and humid indoor air is cooled and dehumidified.

[0055] Furthermore, a technical feature of the present invention is that a refrigerant system separate from the cooling line 100 is formed.

[0056] The high-temperature, high-pressure refrigerant discharged from the discharge side 11 of the compressor 10 is discharged into a dehumidification line 200 formed between the discharge side 11 and the four-way valve 20. The high-temperature, high-pressure refrigerant passes through an upper refrigerant line 210a of a dehumidifying heat exchanger 210, which is installed parallel to and spaced apart from the lower part of the indoor heat exchanger 51 of the indoor unit 50. The high-temperature, high-pressure refrigerant passes through a second expansion valve 220 to become a low-temperature, low-pressure refrigerant, and then flows into a lower refrigerant line 210b of the dehumidifying heat exchanger 210 again. The passed refrigerant is circulated to the compressor 10 via the suction side 12 of the compressor 10 through the dehumidification line 200.

[0057] Indoor air flowing into the front of the indoor unit 50 is cooled and dehumidified when passing through the heat exchanger of the lower refrigerant line 210b of the dehumidifying heat exchanger 210, and the air temperature of the cooled and dehumidified air increases when passing through the heat exchanger of the upper refrigerant line 210a, and then passes through the indoor heat exchanger 51 to be cooled and dehumidified before being supplied to the room.

[0058] Also, if the indoor air temperature is sufficiently cooled but the humidity is high, The cooling line 100 is stopped and only the dehumidifying line 200 is operated. To this end, a separate dehumidifying heat exchanger 210 is provided inside the indoor unit 50, and the dehumidifying heat exchanger 210 is characterized in that a high-temperature, high-pressure refrigerant line and a low-temperature, low-pressure refrigerant line passing through a second expansion valve 220 are integrated into one unit.

[0059] for that, In the present invention, when the control unit 400 switches to the cooling mode, the dehumidifying valve 230 formed in the dehumidifying line 200 on the discharge side 11 of the compressor 10 is closed, and the cooling / heating valve 60 is opened, so that the cooling operation is performed alone. When the dehumidification mode is switched to, the dehumidification valve 230 formed in the dehumidification line 200 on the discharge side 11 of the compressor 10 is opened, and the cooling / heating valve 60 is closed, so that the dehumidification operation is performed alone.

[0060] In addition, the present invention is a system in which cooling and dehumidifying operations are performed simultaneously, When the mode is switched to the cooling and dehumidifying mode, the dehumidifying valve 230 formed in the dehumidifying line 200 on the discharge side 11 of the compressor 10 is opened, and the cooling and heating valve 60 is also opened. The refrigerant discharged from the compressor 10 is distributed and supplied to the cooling line 100 and the dehumidifying line 200 at a preset ratio, and is mutually flowed into the receiver separator 80 provided at the front end of the compressor 10, so as to be circulated to the compressor 10.

[0061] The temperature of the indoor air passing through the dehumidifying heat exchanger 210 of the dehumidifying line 200 increases, and the air passes through the upper indoor heat exchanger 51 to be cooled and dehumidified. This is characterized by its operation at a supply destination that precisely controls the temperature and humidity simultaneously, such as a semiconductor device that precisely controls the temperature and humidity of indoor air.

[0062] In addition, the control unit 400 of the present invention is configured to control and adjust the supply amount of each refrigerant branched from the discharge side 11 of the compressor 10 so as to reach a preset temperature and humidity based on the real-time temperature and humidity of the indoor supply destination in the cooling and dehumidifying simultaneous operation mode and the heating and dehumidifying simultaneous operation mode, To this end, the refrigerant discharged from the compressor 10 is distributed to the cooling and heating lines 100, 300 and the dehumidification line 200 at a preset ratio, and is supplied to the cooling and heating lines 100, 300 and the dehumidification line 200, respectively. The amount of refrigerant distributed is determined by measuring the temperature and humidity of the indoor air in real time, and the opening and closing degrees of the cooling and heating valve 60 and the dehumidification valve 230 are automatically controlled so that the preset temperature and humidity are achieved.

[0063] FIG. 2 is a schematic diagram showing a refrigerant system diagram for heating and dehumidification according to a control method for a heat pump equipped with a dehumidifying unit in an indoor unit according to the present invention; The present invention further includes a heating line 300 in which the high-temperature, high-pressure refrigerant discharged from the discharge side 11 of the compressor 10 passes through the four-way valve 20, the indoor heat exchanger 51 installed in the indoor unit 50, and the first expansion valve 40 in that order to become a low-temperature, low-pressure refrigerant, which then passes through the outdoor unit 30 and the four-way valve 20 in that order, and circulates back to the suction side 12 of the compressor 10. This heating line 300 reverses the refrigerant circulation direction of the cooling line 100.

[0064] When the control unit 400 of the present invention switches to the heating mode, the dehumidification valve 230 formed in the dehumidification line 200 on the discharge side 11 of the compressor 10 is closed and the heating / cooling valve 60 is opened, thereby increasing the temperature of the indoor air passing through the indoor heat exchanger 51 installed in the indoor unit 50 and providing the indoor air set as the indoor supply destination.

[0065] The technical feature of the present invention is that when the dehumidification mode is switched to, the dehumidification valve 230 formed in the dehumidification line 200 on the discharge side 11 of the compressor 10 is opened and the cooling / heating valve 60 is closed. This is an operation mode that is used in low-temperature, high-humidity supply destinations where humidity is high even in winter, and is necessary for indoor supply destinations where humidity is low and high, such as greenhouses where plants need to grow.

[0066] Furthermore, a technical feature of the present invention is that when the mode is switched to the heating and dehumidifying mode, the dehumidifying valve 230 formed in the dehumidifying line 200 on the discharge side 11 of the compressor 10 is opened, and the cooling and heating valve 60 is also opened. The refrigerant discharged from the compressor 10 is distributed and supplied to the heating line 300 and the dehumidifying line 200 at a preset ratio, and flows mutually into a receiver separator 80 provided at the front end of the compressor 10, and is circulated to the compressor 10.

[0067] For a low-temperature, high-humidity indoor environment, the temperature of indoor air passing through the dehumidifying heat exchanger 210 of the dehumidifying line 200 rises, and the air is cooled and dehumidified by passing through the upper indoor heat exchanger 51. This is characterized by its operation at a supply destination that precisely controls the temperature and humidity simultaneously, such as a semiconductor device that precisely controls the temperature and humidity of indoor air.

[0068] To this end, the refrigerant discharged from the compressor 10 is distributed to the cooling line 100 and the dehumidifying line 200 at a preset ratio, and is supplied to the cooling line 100 and the dehumidifying line 200, respectively. The amount of refrigerant distributed is determined by measuring the temperature and humidity of the indoor air in real time, and the opening and closing degrees of the cooling / heating valve 60 and the dehumidifying valve 230 are automatically controlled so that the preset temperature and humidity are achieved.

[0069] Although the present invention has been described above using limited embodiments and drawings, the present invention is not limited thereby, and it goes without saying that a person having ordinary knowledge in the technical field to which the present invention pertains can make various modifications and changes within the technical spirit of the present invention and the scope of equivalents of the appended claims. [Explanation of symbols]

[0070] 10 Compressor 11 Discharge side 12 Intake side 20 Four-way valve 30 Outdoor unit 35 Outdoor heat exchanger 35a Upper road section 35b Chubu Road section 35c Lower road section 38 Outdoor refrigerant liquid recovery section 40 First expansion valve 50 Indoor unit 51 Indoor heat exchanger 60 Heating and cooling valve 70 Reheat tube 71 Electric heater rod 80 Receiving liquid separator 100 Cooling Line 200 Dehumidification Line 210 Dehumidification heat exchanger 210a Upper refrigerant line 210b Lower refrigerant line 220 Second expansion valve 230 Dehumidification valve 300 Heating Line 400 control section

Claims

1. In a heat pump system, A cooling line (100) in which a high-temperature, high-pressure refrigerant discharged from a discharge side (11) of a compressor (10) passes through a four-way valve (20), an outdoor unit (30), and a first expansion valve (40) in this order to become a low-temperature, low-pressure refrigerant, which flows into the four-way valve (20) via an indoor heat exchanger (51) installed in an indoor unit (50), and is circulated again to a suction side (12) of the compressor (10); The high-temperature, high-pressure refrigerant discharged from the discharge side (11) of the compressor (10) is discharged to a dehumidification line (200) formed between the discharge side (11) and the four-way valve (20), and the high-temperature, high-pressure refrigerant that has passed through an upper refrigerant line (210a) of a dehumidifying heat exchanger (210) that is installed parallel to and spaced apart from the lower part of the indoor heat exchanger (51) of the indoor unit (50) passes through a second expansion valve (220), The refrigerant becomes a low-temperature, low-pressure refrigerant and flows again into the lower refrigerant line (210b) of the dehumidifying heat exchanger (210), and the refrigerant that has passed through the dehumidifying heat exchanger (210) is circulated to the compressor (10) via the suction side (12) of the compressor (10). The indoor air flowing into the front of the indoor unit (50) is cooled and dehumidified when passing through the heat exchanger of the lower refrigerant line (210b) of the dehumidifying heat exchanger (210), and the cooled and dehumidified air has its temperature increased when passing through the heat exchanger of the upper refrigerant line (210a), and then passes through the indoor heat exchanger (51) to be cooled and dehumidified and supplied to the room. When the control unit (400) switches to the cooling mode, the dehumidification valve (230) formed in the dehumidification line (200) on the discharge side (11) of the compressor (10) is closed, and the cooling / heating valve (60) is opened. When the mode is switched to the dehumidification mode, the dehumidification valve (230) formed in the dehumidification line (200) on the discharge side (11) of the compressor (10) is opened, and the cooling / heating valve (60) is closed. When the mode is switched to the cooling / dehumidifying mode, the dehumidifying valve (230) formed in the dehumidifying line (200) on the discharge side (11) of the compressor (10) is opened, and the cooling / heating valve (60) is also opened. The refrigerant discharged from the compressor (10) is distributed and supplied to the cooling line (100) and the dehumidification line (200) at a preset ratio, and is mutually flowed into a receiver separator (80) provided at the front end of the compressor (10), and is circulated to the compressor (10). The dehumidification line (200) is provided, The system further includes a heating line (300) through which a high-temperature, high-pressure refrigerant discharged from a discharge side (11) of the compressor (10) passes through a four-way valve (20), an indoor heat exchanger (51) installed in an indoor unit (50), and a first expansion valve (40) in this order to become a low-temperature, low-pressure refrigerant, which passes through an outdoor unit (30) and the four-way valve (20) in this order, and circulates again to the suction side (12) of the compressor (10), A plurality of reheat pipes (70) equipped with electric heater rods (71) are formed on the inlet side of the heating line (300) of the outdoor unit (30), and the surface temperature of the outdoor heat exchanger (31) of the outdoor unit (30) and the humidity temperature of the inflow air flowing into the outdoor unit (30) are measured. The control unit (400) determines whether or not to perform defrosting, and when a defrosting condition is satisfied, The electric heater rods (71) are activated and are configured to selectively activate multiple rods simultaneously. When the control unit (400) switches to the heating mode, the dehumidification valve (230) formed in the dehumidification line (200) on the discharge side (11) of the compressor (10) is closed, and the cooling / heating valve (60) is opened. When the mode is switched to the dehumidification mode, the dehumidification valve (230) formed in the dehumidification line (200) on the discharge side (11) of the compressor (10) is opened, and the cooling / heating valve (60) is closed. When the mode is switched to the heating and dehumidifying mode, the dehumidifying valve (230) formed in the dehumidifying line (200) on the discharge side (11) of the compressor (10) is opened, and the cooling and heating valve (60) is also opened. The refrigerant discharged from the compressor (10) is distributed and supplied to the heating line (300) and the dehumidifying line (200) at a preset ratio, and is reciprocally flowed into a receiver separator (80) provided at the front end of the compressor (10) and circulated to the compressor (10). The outdoor heat exchanger (35) of the outdoor unit (30) has a plurality of refrigerant branch paths, It consists of an upper path portion (35a), a middle path portion (35b), and a lower path portion (35c), The upper passage portion (35a) allows the refrigerant to flow in from the top to form a preset refrigerant flow path, and then flows out from the top to an outdoor refrigerant liquid recovery portion (38) located at the outside lower portion of the outdoor heat exchanger (35), The central passage portion (35b) allows the refrigerant to flow in from the central portion to form a preset refrigerant flow path, and then flows out from the central portion to the outdoor refrigerant liquid recovery portion (38), The lower passage portion (35c) allows the refrigerant to flow in from the lower portion to form a preset refrigerant flow path, and then flows out from the lower portion to the outdoor refrigerant liquid recovery portion (38), The refrigerant mixed in the outdoor refrigerant liquid recovery section (38) flows back into the outdoor heat exchanger (35), undergoes heat exchange, and then flows out of the outdoor heat exchanger (35) again.

2. 2. The heating / cooling heat pump system with a dehumidifying unit in an indoor unit according to claim 1, wherein the number of refrigerant pipes forming the upper refrigerant line (210a) that functions as a condenser of the dehumidifying heat exchanger (210) is greater than the number of refrigerant pipes forming the lower refrigerant line (210b) that functions as an evaporator.

3. 3. The cooling / heating heat pump system having a dehumidifying unit in an indoor unit according to claim 1, wherein the heat capacity of the dehumidifying heat exchanger (210) is smaller than that of the indoor heat exchanger (51).

4. 1. A method for controlling a heat pump, comprising: The indoor unit (50) is provided with an indoor heat exchanger (51) and a dehumidifying heat exchanger (210) attached separately to the lower part of the indoor heat exchanger (51) and spaced apart from the indoor heat exchanger (51), a cooling line (100) and a heating line (300) connected to an outdoor heat exchanger (31) of the outdoor unit (30) and configured by interconnecting an indoor heat exchanger (51) and the outdoor heat exchanger (31); A control unit (400) for the cooling / heating heat pump is formed, which is composed of a dehumidifying line (200) consisting of an upper refrigerant line (210a) that functions as a condenser in a dehumidifying heat exchanger (210) and a lower refrigerant line (210b) that functions as an evaporator, in addition to the cooling line (100) and the heating line (300). The high-temperature, high-pressure refrigerant discharged from the discharge side (11) of the compressor (10) is discharged to a dehumidification line (200) formed between the discharge side (11) and the four-way valve (20), and the high-temperature, high-pressure refrigerant that has passed through an upper refrigerant line (210a) of a dehumidifying heat exchanger (210) that is installed parallel to and spaced apart from the lower part of the indoor heat exchanger (51) of the indoor unit (50) passes through a second expansion valve (220) and is The refrigerant becomes a low-temperature, low-pressure refrigerant and flows again into the lower refrigerant line (210b) of the dehumidifying heat exchanger (210), and the refrigerant that has passed through the dehumidifying heat exchanger (210) is circulated to the compressor (10) via the suction side (12) of the compressor (10). The indoor air flowing into the front of the indoor unit (50) is cooled and dehumidified when passing through the heat exchanger of the lower refrigerant line (210b) of the dehumidifying heat exchanger (210), and the cooled and dehumidified air has its temperature increased when passing through the heat exchanger of the upper refrigerant line (210a), and then passes through the indoor heat exchanger (51) to be cooled and dehumidified and supplied to the room. The control unit (400) is configured to receive the temperature and humidity measured in real time at the indoor supply destination, the surface temperature of the outdoor heat exchanger (31), and the humidity flowing into the outdoor heat exchanger (31), and to control them to preset values; In a cooling operation mode, the dehumidification line (200) is turned off, the indoor heat exchanger (51) is converted to an evaporator function, and a cooling line (100) control method is provided for supplying refrigerant to control a preset temperature and humidity of an indoor supply destination. a control method for the dehumidification line (200) in which, in a dehumidification operation mode, the cooling line (100) and the heating line (300) are turned off and a refrigerant is supplied to the dehumidification heat exchanger (210) to control a preset temperature and humidity of an indoor supply destination; In a heating operation mode, the dehumidification line (200) is turned off, the indoor heat exchanger (51) is converted to a condenser function, and a heating line (300) is controlled to supply refrigerant and control the preset temperature and humidity of the indoor supply destination. In the simultaneous cooling and dehumidification operation mode, the cooling line (100) and the dehumidification line (200) are controlled to operate simultaneously, In the simultaneous heating and dehumidification operation mode, the heating line (300) and the dehumidification line (200) are controlled to operate simultaneously, The discharge side (11) of one compressor (10) constituting the heat pump is branched into two refrigerant supply lines, one of which is controlled to supply high-temperature, high-pressure refrigerant to the cooling line (100) and the heating line (300), and the other is controlled by opening and closing valves to supply high-temperature, high-pressure refrigerant to the dehumidification line (200). The control unit (400) The surface temperature of the outdoor heat exchanger (31) and the humidity and temperature of the inflow air are measured to determine whether defrosting is necessary, and if the defrosting conditions are met, A plurality of reheat pipes (70) equipped with electric heater rods (71) installed on the inlet side of the outdoor unit (30) are configured to be selectively operated simultaneously, The control unit (400) In the simultaneous cooling and dehumidification operation mode and the simultaneous heating and dehumidification operation mode, A control method for a heating / cooling heat pump equipped with a dehumidifying unit in an indoor unit, characterized in that the amount of refrigerant supplied branched from the discharge side (11) of the compressor (10) is controlled and adjusted based on the real-time temperature and humidity of the indoor supply destination so as to reach a preset temperature and humidity.

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