Cooling and heating heat pump system having dehumidifying unit in indoor unit

Abstract

The present invention relates to a cooling and heating heat pump system having a dehumidifying unit in an indoor unit, the heat pump system comprising: a cooling line in which a high-temperature and high-pressure refrigerant discharged at a discharge side of a compressor passes through a four-way valve, passes through an outdoor unit and a first expansion valve, is converted into a low-temperature and low-pressure refrigerant, passes through an indoor heat exchanger seated in the indoor unit, flows into the four-way valve, and is then circulated back to a suction side of the compressor; and a dehumidifying line in which a high-temperature and high-pressure refrigerant discharged at the discharge side of the compressor is discharged via the dehumidifying line formed between the discharge side and the four-way valve, the high-temperature and high-pressure refrigerant, which has passed through a top refrigerant line of a dehumidifying heat exchanger seated in parallel with and spaced apart from a lower end of the indoor heat exchanger of the indoor unit, passes through a second expansion valve, is converted into a low-temperature and low-pressure refrigerant, and flows back into a bottom refrigerant line of the dehumidifying heat exchanger, and the passing refrigerant is circulated to the compressor via the suction side of the compressor.

Description

Heating and cooling heat pump system with a dehumidification unit in the indoor unit

[0001] The present invention relates to a heating and cooling heat pump system having a dehumidification unit in an indoor unit, which has a system that operates dehumidification separately or simultaneously during cooling and heating operations, and a heating and cooling heat pump system having a normal refrigerant cycle operation and a separate dehumidification heat exchanger in the indoor unit.

[0002] In general, a heat pump is a heating and cooling device that transfers a low-temperature heat source to a high-temperature one or a high-temperature heat source to a low-temperature one by using the heat generation or condensation heat of a refrigerant. Depending on the driving method, it is divided into electric and engine types, but most of them are currently structured to perform both cooling and heating.

[0003] These heat pump heating and cooling systems consist of a cooling cycle including a compressor, a condenser, an expansion valve, and an evaporator, and use a four-way valve or an electromagnetic valve to cause the condenser to act as an evaporator and vice versa to act as a condenser to act as a condenser, thereby performing cooling and heating.

[0004] These heat pump-based heating and cooling systems are used for heating and cooling in various facilities, and are also applied to crop cultivation facilities such as fruits, vegetables, and special crops to appropriately control the cultivation temperature and optimize the cultivation conditions.

[0005] However, existing heating and cooling devices using heat pumps have a weak humidity control function, so when applied to crop cultivation facilities that are sensitive to humidity control as well as temperature control, there is a problem of having to install a separate dehumidifier.

[0006] In addition, these existing dehumidifying and heating devices had problems such as a lack of refrigerant due to refrigerant condensation in the cold winter season and saturation of refrigerant in the hot summer season, which reduced the efficiency of cooling, heating, and dehumidifying functions. As a result, additional air conditioners had to be operated in the summer season and electric heaters and hot air blowers had to be operated separately in the winter season, which was cumbersome and required a lot of equipment installation costs.

[0007] Additionally, in summer, chilled water supplied by the heating and cooling load pump cools and dehumidifies the air ventilated from the greenhouse via a hot and cold water heat exchanger. However, greenhouses typically have significantly higher humidity loads than typical air-conditioned spaces, necessitating extensive dehumidification. However, excessive dehumidification can lower not only the humidity but also the temperature in the hot and cold water heat exchanger, causing the temperature of the air supplied to the greenhouse to drop excessively.

[0008] If air at a temperature excessively lower than the average temperature inside the greenhouse is supplied to the greenhouse, undesirable results such as poor crop growth and poor ignition occur.

[0009] However, to prevent these growth and ignition failures, if the temperature difference between ventilation and supply air is small, a large amount of air must be circulated to handle the cooling load of the greenhouse, so the air conditioner fan becomes larger and its power increases. In addition, if the air rotation speed is too high, the amount of air bypassing the cold and hot water heat exchangers increases, and there is a disadvantage that dew does not form on the coil, which hinders proper dehumidification.

[0010] [Prior Art Literature]

[0011] [Patent Document]

[0012] (Patent Document 1) Republic of Korea Patent Publication No. 10-133646

[0013] (Patent Document 2) Republic of Korea Patent Publication No. 10-2021525

[0014] (Patent Document 3) Republic of Korea Patent Publication No. 10-2050694

[0015] The present invention has been devised to solve the above problems, and the purpose of the present invention is to provide a system that operates cooling and heating operation and dehumidification operation separately or simultaneously to increase the efficiency of dehumidification operation and to operate to provide a large amount of dehumidification, and to provide a cooling and heating system that does not require a separate dehumidifier.

[0016] The present invention is a means for solving the above problems, and the present invention

[0017] In a heat pump system, a cooling line in which high-temperature and 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, is converted into a low-temperature and low-pressure refrigerant, passes through an indoor heat exchanger mounted on an indoor unit, and flows into the four-way valve, and is circulated back to the suction side of the compressor; a dehumidification line in which high-temperature and high-pressure refrigerant discharged to the discharge side of the compressor is discharged to a dehumidification line formed between the discharge side and the four-way valve, and the high-temperature and high-pressure refrigerant that passes through the upper refrigerant line of a dehumidifying heat exchanger mounted parallel to and spaced from the lower end of the indoor heat exchanger of the indoor unit passes through a second expansion valve, is converted into a low-temperature and low-pressure refrigerant, and flows into the lower refrigerant line of the dehumidifying heat exchanger, and the refrigerant that passes through the dehumidification line is circulated back to the compressor through the suction side of the compressor; When the control unit switches to the cooling mode, the dehumidification valve formed in the dehumidification line on the discharge side of the compressor is closed and the heating / cooling valve is opened at the same time; when the control unit switches to the dehumidification mode, the dehumidification valve formed in the dehumidification line on the discharge side of the compressor is opened and the heating / cooling valve is closed at the same time; when the control unit switches to the cooling / dehumidification mode, the dehumidification valve formed in the dehumidification line on the discharge side of the compressor is opened and the heating / cooling valve is opened together, so that the refrigerant discharged from the compressor is discharged through the refrigerant line and the dehumidification line.

[0018] The present invention relates to a heating and cooling heat pump system having a dehumidifying unit in an indoor unit, wherein the sap is distributed and supplied at a preset ratio, and is mutually introduced into a sap separator mounted on the front end of the compressor and circulated to the compressor;

[0019] As described above, the present invention operates the heating and cooling operation and the dehumidification operation separately or simultaneously, thereby facilitating control of the heating and cooling operation and the dehumidification operation, and has the effect of increasing the efficiency of the dehumidification operation.

[0020] In addition, it provides a system that operates to achieve a large amount of dehumidification, and has the effect of eliminating the need for a separate dehumidifier.

[0021] In addition, in winter, the efficiency and heat amount decrease due to defrosting of the evaporator of the outdoor heat exchanger, and in order to prevent a rapid decrease in heating efficiency, a reheat pipe is used to supply heat to the reheat pipe in several stages according to the degree of defrosting and the degree of decrease in heating operation efficiency, thereby having the effect of normal operation.

[0022] Figure 1 shows a cooling heat pump system having a dehumidification unit in an indoor unit according to the present invention.

[0023] Schematic diagram shown.

[0024] Figure 2 is a schematic diagram showing a heating heat pump system having a dehumidification unit in an indoor unit according to the present invention.

[0025] Figure 3 is a heating and cooling heat pump system having a dehumidification unit in the indoor unit according to the present invention.

[0026] Schematic diagram showing the reheat pipe.

[0027] Figures 4a and 4b are schematic diagrams showing the refrigerant path of the outdoor heat exchanger of the cooling and heating heat pump system having a dehumidification unit in the indoor unit according to the present invention.

[0028] <Indication of symbols for major parts of the drawing>

[0029] 10: Compressor

[0030] 11: Discharge side 12: Discharge side

[0031] 20: All sides 30: Outdoor unit

[0032] 35: Outdoor heat exchanger

[0033] 35a: Top pass 35b: Middle pass

[0034] 35c: Lower pass section 38: Outdoor refrigerant liquid collection section

[0035] 40: First expansion valve 50: Indoor unit

[0036] 51: Indoor heat exchanger 60: Heating and cooling valve

[0037] 70: Reheat pipe 71: Electric heater rod

[0038] 80: Sap separator

[0039] 100: Cooling line

[0040] 200: Dehumidification line 210: Dehumidification heat exchanger

[0041] 210a: Upper refrigerant line 210b: Lower refrigerant line

[0042] 220: Second expansion valve 230: Dehumidification valve

[0043] 300: Heating line

[0044] 400: Control Unit

[0045] Before explaining various embodiments of the present invention in detail, it is to be understood that the details of the construction and arrangement of the components set forth in the following detailed description or illustrated in the drawings are not intended to limit the scope of the invention. The present invention may be embodied and practiced in other embodiments and carried out in various ways. It is also to be understood that expressions and terminology used herein with respect to device or element orientation (e.g., “front,” “back,” “up,” “down,” “top,” “bottom,” “left,” “right,” “lateral”), and the like, are used merely to simplify the description of the invention and do not indicate or imply that the associated device or element must have a particular orientation. Furthermore, terms such as “first,” “second,” and the like are used herein and in the appended claims for descriptive purposes and are not intended to indicate or imply relative importance or intent.

[0046] The present invention has the following features to achieve the above purpose.

[0047] Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the attached drawings. Prior to this, it should be noted that the terms and words used in this specification and claims should not be construed as limited to their conventional or dictionary meanings. Based on the principle that the inventor can appropriately define the concepts of terms to best explain his or her invention, they should be interpreted in a way that aligns with the technical spirit of the present invention.

[0048] Accordingly, the embodiments described in this specification and the configurations illustrated 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. Therefore, it should be understood that there may be various equivalents and modified examples that can replace them at the time of filing this application.

[0049]

[0050] Looking at an example according to the present invention,

[0051] In heat pump systems,

[0052] The high temperature and 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), where it is converted into a low temperature and low pressure refrigerant, passes through the indoor heat exchanger (51) installed in the indoor unit (50), and flows into the four-way valve (20), and is circulated back to the suction side (12) of the compressor (10) through the cooling line (100);

[0053] The high temperature and high pressure refrigerant discharged to the discharge side (11) of the compressor (10) is discharged through the dehumidification line (200) formed between the discharge side (11) and the four-way valve (20), and the high temperature and high pressure refrigerant that passes through the upper refrigerant line (210a) of the dehumidification heat exchanger (210) that is spaced apart from and installed in parallel to the lower part of the indoor heat exchanger (51) of the indoor unit (50) passes through the second expansion valve (220).

[0054] It is converted into low-temperature, low-pressure refrigerant and again flows into the lower refrigerant line (210b) of the dehumidifying heat exchanger (210), and the refrigerant passing through it is circulated to the compressor (10) through the suction side (12) of the compressor (10) through the dehumidifying line (200).

[0055] When the control unit (400) switches to cooling mode, the dehumidification valve (230) formed in the dehumidification line (200) of the discharge side (11) of the compressor (10) closes and the heating / cooling valve (60) opens;

[0056] When switched to the dehumidification mode, the dehumidification valve (230) formed in the dehumidification line (200) of the discharge side (11) of the compressor (10) is formed to open while the heating / cooling valve (60) is closed.

[0057] When switching to the cooling / dehumidifying mode, the dehumidifying valve (230) formed in the dehumidifying line (200) of the discharge side (11) of the compressor (10) is opened and the cooling / heating valve (60) is opened at the same time.

[0058] The refrigerant discharged from the compressor (10) is passed through the refrigerant line (100) and the dehumidification line (200).

[0059] It is distributed and supplied at a preset ratio and is mounted on the front end of the compressor (10).

[0060] The present invention relates to a heating and cooling heat pump system having a dehumidifying unit in an indoor unit, which is formed so that the sap is mutually introduced into a sap separator (80) and circulated to a compressor (10).

[0061]

[0062] In addition, as another embodiment of the present invention,

[0063] The high temperature and 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), where it is converted into a low temperature and low pressure refrigerant, and a heating line (300) is added that circulates the refrigerant through the outdoor unit (30), the four-way valve (20), and back to the suction side (12) of the compressor (10).

[0064] A plurality of reheat pipes (70) equipped with electric heater rods (71) are formed on the inlet side of the outdoor unit (30) of the above heating line (300), and the surface temperature of the outdoor heat exchanger (31) of the above outdoor unit (30) and the humidity temperature of the inlet air flowing into the outdoor unit (30) are measured, and the control unit (400) determines whether defrosting is required, and when the defrosting condition is reached,

[0065] It operates on the above electric heater rod (71), and optionally, multiple ones are operated simultaneously;

[0066] When the control unit (400) above switches to the heating mode, the dehumidification valve (230) formed in the dehumidification line (200) of the discharge side (11) of the compressor (10) closes and the heating / cooling valve (60) opens;

[0067] When switched to the dehumidification mode, the dehumidification valve (230) formed in the dehumidification line (200) of the discharge side (11) of the compressor (10) is formed to open while the heating / cooling valve (60) is closed.

[0068] When switched to the heating and dehumidifying mode, the dehumidifying valve (230) formed in the dehumidifying line (200) of the discharge side (11) of the compressor (10) is opened and the heating and cooling valve (60) is opened at the same time.

[0069] The refrigerant discharged from the compressor (10) is passed through the heating line (300) and the dehumidification line (200).

[0070] It is distributed and supplied at a preset ratio and is mounted on the front end of the compressor (10).

[0071] It is made so that the liquid is mutually introduced into the sap separator (80) and circulated to the compressor (10).

[0072] In addition, as another embodiment of the present invention,

[0073] The above dehumidifying heat exchanger (210) is configured to have a lower heat capacity than the indoor heat exchanger (51).

[0074] In addition, as another embodiment of the present invention,

[0075] The number of refrigerant pipes forming the upper refrigerant line (210a) that is responsible for the condenser function of the above-mentioned dehumidifying heat exchanger (210) is formed to be greater than the number of refrigerant pipes forming the lower refrigerant line (210b) that is responsible for the evaporator function.

[0076] In addition, as another embodiment of the present invention,

[0077] The multiple refrigerant branch passes of the outdoor heat exchanger (35) of the above outdoor unit (30)

[0078] It is formed by an upper pass section (35a), a middle pass section (35b), and a lower pass section (35c).

[0079] The upper pass section (35a) above is such that the refrigerant flows into the upper section, forms a preset refrigerant pass path, flows out of the upper section, and flows into the outdoor refrigerant liquid collection section (38) located at the outer lower part of the outdoor heat exchanger (35);

[0080] The above-mentioned intermediate pass section (35b) is such that the refrigerant flows into the intermediate section, forms a preset refrigerant pass path, flows out of the intermediate section, and flows into the outdoor refrigerant liquid collection section (38);

[0081] The lower pass section (35c) is formed by the refrigerant flowing into the lower section, forming a preset refrigerant pass path, flowing out of the lower section, and flowing into the outdoor refrigerant liquid collection section (38);

[0082] The refrigerant mixed in the outdoor refrigerant liquid collection unit (38) is again introduced into the outdoor heat exchanger (35), heat is exchanged, and then flows out from the outdoor heat exchanger (35).

[0083] Hereinafter, a heating and cooling heat pump system having a dehumidification unit in an indoor unit according to a preferred embodiment of the present invention will be described in detail with reference to FIGS. 1 to 4.

[0084]

[0085] Figure 1 shows a cooling heat pump system having a dehumidification unit in an indoor unit according to the present invention.

[0086] As shown in the schematic diagram, in the heat pump system,

[0087] The high temperature and 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), where it is converted into a low temperature and low pressure refrigerant, and flows into the four-way valve (20) through 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) to form a cooling line (100). This means that the indoor air that has passed through the indoor heat exchanger (51) is cooled and dehumidified and is discharged indoors.

[0088] It is supplied, and the high temperature and humidity indoor air is cooled and dehumidified.

[0089] In addition, as a technical feature of the present invention, a refrigerant system separate from the cooling line (100) is formed.

[0090] This means that the high temperature and high pressure refrigerant discharged to the discharge side (11) of the compressor (10) is discharged through the dehumidification line (200) formed between the discharge side (11) and the four-way valve (20), and the high temperature and high pressure refrigerant that passes through the upper refrigerant line (210a) of the dehumidification heat exchanger (210) that is spaced apart from and installed in parallel to the lower part of the indoor heat exchanger (51) of the indoor unit (50) passes through the second expansion valve (220).

[0091] It is converted into low-temperature, low-pressure refrigerant and again flows into the lower refrigerant line (210b) of the dehumidifying heat exchanger (210), and the refrigerant passing through it is circulated to the compressor (10) through the suction side (12) of the compressor (10) and is formed into a dehumidifying line (200).

[0092] This is because the temperature of the indoor air is sufficiently cooled, but the humidity is high.

[0093] The above 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 by having a high-temperature, high-pressure refrigerant line and a low-temperature, low-pressure refrigerant line that passes through the second expansion valve (220) built in together.

[0094] For this purpose,

[0095] In the present invention, when the control unit (400) switches to the cooling mode, the dehumidification valve (230) formed in the dehumidification line (200) of the discharge side (11) of the compressor (10) is closed and the heating / cooling valve (60) is opened, so that the cooling operation is performed independently.

[0096] When switching to the dehumidification mode, the dehumidification valve (230) formed in the dehumidification line (200) of the discharge side (11) of the compressor (10) opens and the heating / cooling valve (60) closes.

[0097] It is characterized by the dehumidifying operation operating independently.

[0098] In addition, the present invention is one in which cooling and dehumidifying operations are performed simultaneously.

[0099] When switching to the cooling / dehumidifying mode, the dehumidifying valve (230) formed in the dehumidifying line (200) of the discharge side (11) of the compressor (10) is opened and the cooling / heating valve (60) is opened at the same time.

[0100] The refrigerant discharged from the compressor (10) is passed through the refrigerant line (100) and the dehumidification line (200).

[0101] It is distributed and supplied at a preset ratio and is mounted on the front end of the compressor (10).

[0102] It is made so that the liquid is mutually introduced into the sap separator (80) and circulated to the compressor (10).

[0103] The indoor air passing through the dehumidifying heat exchanger (210) of the dehumidifying line (200) has its temperature increased, passes through the indoor heat exchanger (51) at the top, and is cooled and dehumidified. This

[0104] Precisely, such as semiconductor equipment that precisely controls the temperature and humidity of indoor air

[0105] It is characterized by operating in a supply system that simultaneously controls temperature and humidity.

[0106]

[0107] * In addition, for this purpose, the refrigerant discharged from the compressor (10) is distributed to the refrigerant line (100) and the dehumidification line (200) at a preset ratio and supplied to each refrigerant line (100) and dehumidification line (200), and the amount of refrigerant distributed is automatically controlled by measuring the temperature and humidity of the indoor air in real time and automatically controlling the opening and closing degree of the heating and cooling valve (60) and the dehumidification valve (230) so as to achieve the preset temperature and humidity.

[0108] Figure 2 is a schematic diagram showing a heating heat pump system having a dehumidification unit in an indoor unit according to the present invention.

[0109] The present invention is a heating line (300) in which a high-temperature, high-pressure refrigerant discharged from the discharge side (11) of a 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), where it is converted into a low-temperature, low-pressure refrigerant, passes through an outdoor unit (30), passes through a four-way valve (20), and then circulates back to the suction side (12) of the compressor (10), which forms the reverse of the refrigerant circulation direction of the cooling line (100).

[0110] When the control unit (400) of the present invention switches to the heating mode, the dehumidification valve (230) formed in the dehumidification line (200) of the discharge side (11) of the compressor (10) is closed and the heating / cooling valve (60) is opened, and as a result, the temperature of the indoor air passing through the indoor heat exchanger (51) installed in the indoor unit (50) increases, and the indoor air set in the indoor supply source is provided.

[0111] The technical feature of the present invention is that when switched to the dehumidification mode, the dehumidification valve (230) formed in the dehumidification line (200) of the discharge side (11) of the compressor (10) is formed to open while the heating / cooling valve (60) is closed. This is used in a low-temperature, high-humidity supply location with a lot of moisture even in winter, and is an operation mode required for an indoor supply location with a low temperature and high humidity such as a greenhouse where plant growth is required.

[0112] In addition, the technical feature of the present invention is that when switched to heating and dehumidifying mode,

[0113] The dehumidification valve (230) formed in the dehumidification line (200) of the discharge side (11) of the compressor (10) is formed to open simultaneously with the heating / cooling valve (60).

[0114] The refrigerant discharged from the compressor (10) is passed through the heating line (300) and the dehumidification line (200).

[0115] It is distributed and supplied at a preset ratio and is mounted on the front end of the compressor (10).

[0116] It is characterized by being mutually introduced into the sap separator (80) and circulated to the compressor (10).

[0117] For a low temperature and humidity indoor environment,

[0118] The indoor air passing through the dehumidifying heat exchanger (210) of the dehumidifying line (200) has its temperature increased, passes through the indoor heat exchanger (51) at the top, and is cooled and dehumidified. This

[0119] Precisely, such as semiconductor equipment that precisely controls the temperature and humidity of indoor air

[0120] It is characterized by operating in a supply system that simultaneously controls temperature and humidity.

[0121] In addition, for this purpose, the refrigerant discharged from the compressor (10) is distributed to the refrigerant line (100) and the dehumidification line (200) at a preset ratio and supplied to each refrigerant line (100) and dehumidification line (200), and the amount of refrigerant distributed is automatically controlled by measuring the temperature and humidity of the indoor air in real time and adjusting the opening and closing degrees of the heating and cooling valve (60) and the dehumidification valve (230) so as to achieve the preset temperature and humidity.

[0122] FIG. 3 is a schematic diagram showing a reheat pipe of a heating and cooling heat pump system having a dehumidifying unit in an indoor unit according to the present invention, which relates to defrosting or superheating control of an outdoor unit (30), wherein a plurality of reheat pipes (70) equipped with electric heater rods (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 inlet air flowing into the outdoor unit (30) are measured, and whether defrosting is performed is determined by the control unit (400), and when the defrosting condition is reached,

[0123] It is operated by the above electric heater rod (71), and is characterized in that a plurality of them are selectively operated simultaneously for rapid defrosting.

[0124] This includes the defrosting operation of the outdoor unit (30), and if the temperature of the refrigerant flowing out of the outdoor unit (30) is measured against the surface temperature of the outdoor heat exchanger (31), and if it is lower than the preset refrigerant temperature, it is determined that the refrigerant gas is not condensed, and the electric heater rod (71) is operated so that it is within the preset superheating range.

[0125] In addition, as another embodiment of the present invention,

[0126] As shown in Figures 1 and 2,

[0127] The dehumidifying heat exchanger (210) is formed to be smaller in size than the indoor heat exchanger (51).

[0128] This shows that the heat capacity of the indoor air exchanged from the indoor heat exchanger (51) is relatively smaller than the heat capacity of the dehumidifying heat exchanger (210).

[0129] In addition, as an example, when cooling and dehumidification or heating and dehumidification operations are operated together, if the size of the dehumidification heat exchanger (210) is formed smaller than that of the indoor heat exchanger (51), the first indoor air that escapes outside the dehumidification heat exchanger (210) is introduced into the indoor heat exchanger (51), heat is exchanged, and passes through the indoor heat exchanger (51).

[0130] The indoor air passing through the dehumidifying heat exchanger (210) increases in temperature, and the second indoor air passing through the indoor heat exchanger (51) located above is different from the first indoor air.

[0131] It is mixed and supplied to the indoor supply source.

[0132] In addition, as another embodiment, when the size of the dehumidifying heat exchanger (210) and the size of the indoor heat exchanger (51) are the same, all indoor air that passes through the dehumidifying heat exchanger (210) and has its temperature increased passes through the indoor heat exchanger (51) and is supplied to the indoor supply source.

[0133] Another technical feature of the present invention is

[0134] The dehumidifying heat exchanger (210) of the dehumidifying line (200) responsible for the dehumidifying function is characterized by being formed to perform the condenser function at the top and the evaporator function at the bottom, and for the dehumidifying efficiency, the condenser configuration is formed to have a larger heat capacity than the evaporator configuration, and this is usually formed to form a relative heat difference in the range of 1.3 to 1.4 times.

[0135] To this end, the number of refrigerant pipes forming the upper refrigerant line (210a) responsible for the condenser function is formed to be greater than the number of refrigerant pipes forming the lower refrigerant line (210b) responsible for the evaporator function;

[0136] As an example, the upper refrigerant line (210a) is characterized by being formed in two rows, and the lower refrigerant line (210b) is characterized by being formed in one row.

[0137] Figures 4a and 4a are schematic diagrams showing the refrigerant path of the outdoor heat exchanger of the cooling and heating heat pump system having a dehumidification unit in the indoor unit according to the present invention.

[0138] This is a configuration for increasing the efficiency of the outdoor heat exchanger (35), in which the refrigerant pipes flowing into the outdoor heat exchanger (35) formed by a plurality of refrigerant passages are heat-exchanged inside, flow out from the outdoor heat exchanger (35), are mixed and stored, and then flow back into the outdoor heat exchanger (35) to exchange heat, thereby providing a refrigerant that can be mixed into refrigerant gas and refrigerant liquid.

[0139] All of them are for heat exchange with refrigerant gas.

[0140] For this purpose, the present invention

[0141] The plurality of refrigerant branch passes of the outdoor heat exchanger (35) of the outdoor unit (30) are formed by an upper pass section (35a), a middle pass section (35b), and a lower pass section (35c). The refrigerant flows into the upper portion of the upper pass section (35a), forms a preset refrigerant pass path, flows out of the upper portion, and flows into the outdoor refrigerant liquid collection section (38) located at the outer lower portion of the outdoor heat exchanger (35);

[0142] The above-mentioned intermediate pass section (35b) is such that the refrigerant flows into the intermediate section, forms a preset refrigerant pass path, flows out of the intermediate section, and flows into the outdoor refrigerant liquid collection section (38);

[0143] The lower pass section (35c) is formed by the refrigerant flowing into the lower section, forming a preset refrigerant pass path, flowing out of the lower section, and flowing into the outdoor refrigerant liquid collection section (38);

[0144] The refrigerant mixed in the outdoor refrigerant liquid collection unit (38) is again introduced into the outdoor heat exchanger (35), heat is exchanged, and then flows out from the outdoor heat exchanger (35).

[0145] As described above, although the present invention has been described by limited embodiments and drawings, the present invention is not limited thereto, and various modifications and changes are possible within the scope of the technical idea of ​​the present invention and the equivalent scope of the patent claims to be described below by a person having ordinary skill in the art to which the present invention pertains.

Claims

1. In the heat pump system, The high temperature and 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), where it is converted into a low temperature and low pressure refrigerant, passes through the indoor heat exchanger (51) installed in the indoor unit (50), and flows into the four-way valve (20), and is circulated back to the suction side (12) of the compressor (10) through the cooling line (100); The high temperature and high pressure refrigerant discharged to the discharge side (11) of the compressor (10) is discharged through the dehumidification line (200) formed between the discharge side (11) and the four-way valve (20), and the high temperature and high pressure refrigerant that passes through the upper refrigerant line (210a) of the dehumidification heat exchanger (210) that is spaced apart from and installed in parallel to the lower part of the indoor heat exchanger (51) of the indoor unit (50) passes through the second expansion valve (220). It is converted into low-temperature, low-pressure refrigerant and again flows into the lower refrigerant line (210b) of the dehumidifying heat exchanger (210), and the refrigerant passing through it is circulated to the compressor (10) through the suction side (12) of the compressor (10) through the dehumidifying line (200). When the control unit (400) switches to cooling mode, the dehumidification valve (230) formed in the dehumidification line (200) of the discharge side (11) of the compressor (10) closes and the heating / cooling valve (60) opens; When switched to the dehumidification mode, the dehumidification valve (230) formed in the dehumidification line (200) of the discharge side (11) of the compressor (10) is formed to open while the heating / cooling valve (60) is closed. When switching to the cooling / dehumidifying mode, the dehumidifying valve (230) formed in the dehumidifying line (200) of the discharge side (11) of the compressor (10) is opened and the cooling / heating valve (60) is opened at the same time. The refrigerant discharged from the compressor (10) is passed through the refrigerant line (100) and the dehumidification line (200). It is distributed and supplied at a preset ratio and is mounted on the front end of the compressor (10). A heating and cooling heat pump system having a dehumidification unit in an indoor unit, characterized in that the sap is mutually introduced into the sap separator (80) and circulated to the compressor (10).

2. In paragraph 1, Includes the above dehumidification line (200), The high temperature and 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), where it is converted into a low temperature and low pressure refrigerant, and a heating line (300) is added that circulates the refrigerant through the outdoor unit (30), the four-way valve (20), and back 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 outdoor unit (30) of the above heating line (300), and the surface temperature of the outdoor heat exchanger (31) of the above outdoor unit (30) and the humidity temperature of the inlet air flowing into the outdoor unit (30) are measured, and the control unit (400) determines whether defrosting is required, and when the defrosting condition is reached, It operates on the above electric heater rod (71), and optionally, multiple ones are operated simultaneously; When the control unit (400) above switches to the heating mode, the dehumidification valve (230) formed in the dehumidification line (200) of the discharge side (11) of the compressor (10) closes and the heating / cooling valve (60) opens; When switched to the dehumidification mode, the dehumidification valve (230) formed in the dehumidification line (200) of the discharge side (11) of the compressor (10) is formed to open while the heating / cooling valve (60) is closed. When switched to the heating and dehumidifying mode, the dehumidifying valve (230) formed in the dehumidifying line (200) of the discharge side (11) of the compressor (10) is opened and the heating and cooling valve (60) is opened at the same time. The refrigerant discharged from the compressor (10) is passed through the heating line (300) and the dehumidification line (200). It is distributed and supplied at a preset ratio and is mounted on the front end of the compressor (10). A heating and cooling heat pump system having a dehumidification unit in an indoor unit, characterized in that the sap is mutually introduced into the sap separator (80) and circulated to the compressor (10).

3. In paragraph 1 or 2, A heating and cooling heat pump system having a dehumidification unit in an indoor unit, characterized in that the number of refrigerant pipes forming the upper refrigerant line (210a) that performs the condenser function of the above-mentioned dehumidifying heat exchanger (210) is formed to be greater than the number of refrigerant pipes forming the lower refrigerant line (210b) that performs the evaporator function.

4. In paragraph 1 or 2, A heating and cooling heat pump system having a dehumidifying unit in an indoor unit, characterized in that the above dehumidifying heat exchanger (210) has a lower heat capacity than the indoor heat exchanger (51).

5. In paragraph 3, The multiple refrigerant branch passes of the outdoor heat exchanger (35) of the above outdoor unit (30) It is formed by an upper pass section (35a), a middle pass section (35b), and a lower pass section (35c). The upper pass section (35a) above is such that the refrigerant flows into the upper section, forms a preset refrigerant pass path, flows out of the upper section, and flows into the outdoor refrigerant liquid collection section (38) located at the outer lower part of the outdoor heat exchanger (35); The above-mentioned intermediate pass section (35b) is such that the refrigerant flows into the intermediate section, forms a preset refrigerant pass path, flows out of the intermediate section, and flows into the outdoor refrigerant liquid collection section (38); The lower pass section (35c) is formed by the refrigerant flowing into the lower section, forming a preset refrigerant pass path, flowing out of the lower section, and flowing into the outdoor refrigerant liquid collection section (38); A heating and cooling heat pump system having a dehumidification unit in an indoor unit, characterized in that the refrigerant mixed in the outdoor refrigerant liquid collection unit (38) is again introduced into the outdoor heat exchanger (35), heat is exchanged, and then again flows out from the outdoor heat exchanger (35).

Images