Air conditioner indoor unit system connected with floor heating system

Abstract

The invention belongs to the technical field of air conditioner indoor units, and particularly relates to an air conditioner indoor unit system connected with a floor heater. According to the air conditioner indoor unit system connected with the floor heating system, a refrigerant liquid pipe unit, a gas collecting pipe unit and a four-way valve unit are arranged on a machine box and a heat exchanger, so that 1, the refrigerant liquid pipe unit is communicated with an outdoor unit high-pressure pipe and the heat exchanger, and the four-way valve unit and the gas collecting pipe unit are communicated with the heat exchanger, an outdoor unit and / or a floor heating coil pipe; only one refrigerant exists in all pipelines of the air conditioner indoor unit and the floor heating unit, the problem that the refrigerating / heating efficiency is low due to heat exchange among different refrigerants is solved, the conditions of freezing, water leakage and the like of the air conditioner floor heating unit are reduced, the service life of a product is prolonged, and the effect of the product is improved. And 2, the four-way valve unit controls the trend of the gaseous refrigerant in the heat exchanger, the outdoor unit and / or the floor heating coil, so that the air conditioner indoor unit system not only can independently refrigerate / heat an air conditioner, but also can refrigerate / heat the floor heating at the same time, the heating limit of the floor heating is broken, and the use requirement is widened.

Description

Technical Field

[0001] The present invention belongs to the technical field of air-conditioning indoor units, and in particular relates to an air-conditioning indoor unit system connected to floor heating. Background Art

[0002] Floor heating is mainly composed of four parts: heat source (wall-mounted boiler), terminal (coil), auxiliary materials (insulation film, reflective film, etc.), and control (temperature control panel, electric heating actuator, manifold). Heating pipelines are laid under the floor or floor tiles, and circulating hot water or heating cables are used to heat the floor, and the heat is evenly radiated to the space above the floor.

[0003] The air conditioner is mainly composed of an outdoor unit (air conditioner outdoor unit) and an indoor unit (air conditioner indoor unit), which work together to complete the indoor heating and cooling functions. The main structure of the air conditioner indoor unit includes an evaporator (fin copper-aluminum heat exchanger), a fan motor, an electronic control component, a throttling component, and a shell; the indoor unit is responsible for delivering cold air or hot air to the room to achieve the effect of cooling or heating. The air conditioner outdoor unit mainly includes a compressor, a condenser (fin copper-aluminum heat exchanger), a fan motor, an electronic control component, a throttling component, a gas-liquid separator, a liquid storage tank, a four-way reversing valve, and a shell; the air conditioner outdoor unit is responsible for cooling or heating, delivering the treated condensing agent to the air conditioner indoor unit, and transporting the indoor hot air or cold air to the outdoors through pipes.

[0004] Traditional air conditioning and floor heating are two independent systems. Later, the "two-in-one supply" system was proposed, which consists of an outdoor main unit and multiple indoor terminals. It can meet the needs of simultaneous heating and cooling, cooling through the air-conditioning indoor unit fan coil and heating through water floor heating.

[0005] For example, a Chinese invention patent with patent announcement number CN110906482B and announcement date 2021.06.11 discloses a modular floor heating and air conditioning all-in-one unit, whose structure includes: a refrigerant circulation pipeline, an evaporator 1, a four-way valve, a heat exchanger 1, an evaporator 2, a heat exchanger 2, a water tank 1, a water tank 2, a fan coil, and a floor heating circulation pipeline; an evaporator 1, a four-way valve, a heat exchanger 1, an evaporator 2, and a heat exchanger 2 are provided on the refrigerant circulation pipeline; water tank 1 and water tank 2 wrap heat exchanger 1 and heat exchanger 2, and are connected to the fan coil and the floor heating circulation pipeline.

[0006] The general structural principle of the modular floor heating and air conditioning integrated unit in this invention patent is as follows: the flow direction of the refrigerant is changed by the four-way valve to realize fan coil cooling / heating + floor heating can be heated simultaneously / separately. When the fan coil is cooling, the flow direction of the refrigerant is changed by the four-way valve, and heat exchanger one cools the water in water tank one, and circulating water pump one draws the cold water in water tank one into the fan coil through water pipe one to exchange heat with the air, and then injects it into water tank two along water pipe two, and re-enters water tank one through the return pipe; the floor heating circulation pipe needs to be separately For heating, the four-way valve changes the flow direction of the refrigerant, and heat exchanger one heats the water in water tank one. Solenoid valve three opens, and hot water enters the floor heating circulation pipeline along water pipe three to transfer heat to the ground. The hot water circulates in the floor heating circulation pipeline through circulating water pump two, and the hot water flowing out of the floor heating circulation pipeline is injected into water tank two along water pipe four and re-enters water tank one through the return pipe; when the fan coil unit and the floor heating circulation pipeline are cooling or heating at the same time, circulating water pump one is turned on, solenoid valve three is opened, and hot water or cold water flows along the above-mentioned separate cooling and heating modes.

[0007] However, in actual use, the modular floor heating and air conditioning integrated unit still has at least the following shortcomings, in other words, which are the technical problems to be solved by the present invention.

[0008] 1. Its fan coil units and floor heating use the hot and cold water after the secondary heat exchange of "water-fluorine" in the water tank for cooling / heating, which results in slow heating and cooling of the indoor unit. In addition, water is prone to leakage, freezing, and high demand for regular maintenance during use as the main refrigerant, causing inconvenience in use.

[0009] 2. Floor heating can only provide heating but cannot achieve cooling effect.

[0010] So to sum up, there is an urgent need for a new air-conditioning indoor unit system that has only one refrigerant and can heat and cool floor heating. Summary of the invention

[0011] The present invention provides an air-conditioning indoor unit system connected to floor heating, which can be achieved by arranging a refrigerant liquid pipe unit, an air collecting pipe unit and a four-way valve unit on a chassis and a heat exchanger, so that: 1. The refrigerant liquid pipe unit is connected to the high-pressure pipe of an outdoor unit and the heat exchanger, and the four-way valve unit and the air collecting pipe unit are connected to the heat exchanger, the outdoor unit and / or the floor heating coil, so that there is only one refrigerant in the entire pipeline of the air-conditioning indoor unit and the floor heating, thereby reducing the problem of slow cooling / heating efficiency due to heat exchange between different refrigerants, reducing freezing, water leakage and the like of the air-conditioning floor heating, and improving the service life and effect of the product; 2. The four-way valve unit controls the direction of the gaseous refrigerant in the heat exchanger, the outdoor unit and / or the floor heating coil, so that the air-conditioning indoor unit system can not only cool / heat the air conditioner alone, but also cool / heat the floor heating at the same time, breaking the limitation of floor heating and widening the use demand.

[0012] The technical solution adopted by the present invention to solve the above-mentioned problem is: an air-conditioning indoor unit system connected to floor heating, the structure of which includes a chassis and a heat exchanger, and also includes a refrigerant liquid pipe unit arranged on the chassis and having two ends respectively connected to the high-pressure pipe of the external unit and the heat exchanger, a gas collecting pipe unit arranged on the heat exchanger, and a four-way valve unit arranged on the gas collecting pipe unit and used to connect the low-pressure pipe of the external unit and / or the floor heating coil.

[0013] A further preferred technical solution is that: the refrigerant liquid pipe unit includes a main liquid pipe.

[0014] A further preferred technical solution is that the gas collecting pipe unit includes a gas collecting main pipe and a plurality of gas collecting branch pipes which are arranged on the gas collecting main pipe and are used to connect the heat exchanger.

[0015] A further preferred technical solution is that the four-way valve unit includes a valve body, an air conditioning connecting pipe arranged on the valve body and used to connect to the air collecting main pipe, a low-pressure connecting pipe arranged on the valve body and used to connect to the low-pressure pipe of the external unit, and a floor heating connecting pipe arranged on the valve body and used to connect to the floor heating coil.

[0016] A further preferred technical solution is that the refrigerant liquid pipe unit further includes a branch pipe which is arranged on the main liquid pipe and is used to connect the heat exchanger.

[0017] A further preferred technical solution is that the gas collecting pipe unit further includes a three-way valve which is arranged on the gas collecting main pipe and one end of which is connected to the air conditioning connecting pipe.

[0018] A further preferred technical solution is that: the other end of the three-way valve is also provided with a one-way connection valve for connecting to the low-pressure pipe of the external unit.

[0019] A further preferred technical solution is that: the low-pressure connecting pipe is also provided with a connecting valve for connecting the external machine low-pressure pipe and the one-way connecting valve.

[0020] A further preferred technical solution is that: the chassis is also provided with a water receiving plate for collecting condensed water outside the heat exchanger.

[0021] A further preferred technical solution is that the floor heating coil is made of capillary copper tube. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a structural disassembly diagram of the present invention.

[0023] Figure 2 It is a three-dimensional diagram of the refrigerant liquid pipe unit in the present invention.

[0024] Figure 3It is a three-dimensional diagram of the gas collecting pipe unit in the present invention.

[0025] Figure 4 It is a three-dimensional diagram of the four-way valve unit in the present invention.

[0026] Figure 5 It is a three-dimensional diagram showing the position connection of the gas collecting pipe unit and the four-way valve unit in the present invention.

[0027] Figure 6 It is a cross-sectional view from a side view angle of the present invention.

[0028] Figure 7 This is a refrigerant flow chart of a refrigeration air conditioner utilizing a four-way valve unit according to the present invention.

[0029] Figure 8 This is a refrigerant flow chart of a heating air conditioner using a four-way valve unit according to the present invention.

[0030] Fig. 9 This is a refrigerant flow chart for refrigeration, air conditioning and floor heating using a four-way valve unit in the present invention.

[0031] Fig.10 This is a refrigerant flow chart for heating air conditioning and floor heating using a four-way valve unit according to the present invention.

[0032] Fig.11 This is a refrigerant flow chart of a refrigeration air conditioner utilizing a one-way connection valve according to the present invention.

[0033] Fig.12 This is a refrigerant flow chart for refrigeration, air conditioning and floor heating using a one-way connection valve and a four-way valve unit in the present invention.

[0034] In the figure, the meanings of the symbols are as follows: External unit a, floor heating coil b, external unit high pressure pipe c, external unit low pressure pipe d; Chassis 11, heat exchanger 12, fan 13, motor 14, electrical box 15, exhaust duct 16, air outlet 17; Refrigerant liquid pipe unit 1, gas collecting pipe unit 2, four-way valve unit 3, one-way connecting valve 4, connecting valve 5, water receiving plate 6, water outlet 7; High-pressure connecting pipe 101 , shunt pipe 102 , gas collecting main pipe 201 , gas collecting branch pipe 202 , three-way valve 203 , valve body 301 , air conditioning connecting pipe 302 , low-pressure connecting pipe 303 , floor heating connecting pipe 304 . DETAILED DESCRIPTION

[0035] The following descriptions are merely preferred embodiments of the present invention and are not intended to limit the scope of the present invention.

[0036] As attached Figure 1-12As shown, an air-conditioning indoor unit system connected to floor heating comprises a machine case 11 and a heat exchanger 12, and also comprises a refrigerant liquid pipe unit 1 arranged on the machine case 11 and having two ends respectively connected to an external unit high-pressure pipe c and the heat exchanger 12, an air collecting pipe unit 2 arranged on the heat exchanger 12, and a four-way valve unit 3 arranged on the air collecting pipe unit 2 and used for connecting to an external unit low-pressure pipe d and / or a floor heating coil b.

[0037] In this embodiment, the chassis 11 is installed indoors, and the fan 13 is connected to the motor 14 and is arranged on the other side of the heat exchanger 12, and the cold air / hot air after heat exchange by the heat exchanger 12 is blown into the room through the air outlet 17, so as to achieve the cooling / heating effect. The electrical box 15 is used to install electrical appliances and electronic control equipment, and is sealed. The exhaust duct 16 is used to transport the hot air or cold air in the indoor unit to the outdoor unit through the pipeline and then discharge it into the room. The air conditioner indoor unit system can be responsible for the cooling / heating / dehumidification of the air conditioner.

[0038] In addition, the two ends of the refrigerant liquid pipe unit 1 are respectively connected to the outdoor unit high-pressure pipe c on the outdoor unit a and the heat exchanger 12 in the indoor unit, and are used to circulate the liquid refrigerant in the outdoor unit a and the heat exchanger 12. During cooling, the low-temperature liquid refrigerant in the outdoor unit a is transported by the outdoor unit high-pressure pipe c to the refrigerant liquid pipe unit 1, and is transported to the heat exchanger 12 through the refrigerant liquid pipe unit 1 for heat exchange and cooling; during heating, the gaseous refrigerant in the heat exchanger 12 is liquefied after heat exchange and is transported back to the outdoor unit a through the refrigerant liquid pipe unit 1, thereby realizing the circulation of the refrigerant in the indoor unit and the outdoor unit.

[0039] In addition, the function of the gas collecting pipe unit 2 is to collect the gaseous refrigerant vaporized by the heat exchanger 12 during cooling and transport it to the four-way valve unit 3, and finally transport it to the outdoor unit a; during heating, the high-temperature gaseous refrigerant in the outdoor unit a is transported to the heat exchanger 12 through the gas collecting pipe unit 2 and / or the four-way valve unit 3 for heat exchange, which is an important part of the refrigerant circulation in the indoor unit and the outdoor unit.

[0040] Finally. The four-way valve unit 3 connects the air collecting pipe unit 2 and the external unit low-pressure pipe d on the external unit a, and is connected in series with the floor heating coil b in an openable and closable manner, so that during the cooling / heating process of the air conditioner, the four-way valve unit 3 can be adjusted to choose whether to open the floor heating coil b at the same time. When the air conditioner is used for cooling alone: ​​the four-way valve unit 3 is not energized, the low-temperature liquid refrigerant in the external unit a - the external unit high-pressure pipe c - the refrigerant liquid pipe unit 1 - the heat exchanger 12 (heat exchange and vaporization to form a gaseous refrigerant) - the air collecting pipe unit 2 - the four-way valve unit 3 - the external unit low-pressure pipe d - the external unit a; when the air conditioner is used for cooling + floor heating: the four-way valve unit 3 is energized, the low-temperature liquid refrigerant in the external unit a - the external unit high-pressure pipe c - the refrigerant liquid pipe unit 1 - the heat exchanger 12 ( Heat exchange and gasification to form gaseous refrigerant)—the collecting pipe unit 2—the four-way valve unit 3—the floor heating coil b—the low-pressure pipe d of the outdoor unit—the outdoor unit a; the circulation mode of single air conditioning heating and air conditioning heating + floor heating is opposite to the above-mentioned cooling mode, and the high-temperature gaseous refrigerant flows through the low-pressure pipe d of the outdoor unit—the four-way valve unit 3—the collecting pipe unit 2—the heat exchanger 12—the high-pressure pipe c of the outdoor unit—the outdoor unit a, and the floor heating coil b can be heated after the four-way valve unit 3 is powered on. The air conditioning indoor unit system uses only one refrigerant for heat exchange in the whole process, reducing the problem of slow cooling / heating efficiency caused by heat exchange between different refrigerants, avoiding the use of water as a refrigerant as much as possible, reducing the freezing and water leakage of air conditioning floor heating, and improving the service life and use effect of the product. In addition, the flexible control of the four-way valve unit 3 enables the air conditioning indoor unit system to cool / heat the air conditioner alone, and cool / heat the floor heating at the same time, breaking the limitation of floor heating and widening the use demand.

[0041] The refrigerant liquid pipe unit 1 includes a main liquid pipe 101 .

[0042] In this embodiment, the main liquid pipe 101 functions to circulate the liquid refrigerant in the external unit a and the heat exchanger 12 .

[0043] The gas collecting pipe unit 2 includes a gas collecting main pipe 201 and a plurality of gas collecting branch pipes 202 disposed on the gas collecting main pipe 201 and used for connecting the heat exchanger 12 .

[0044] In this embodiment, the main liquid pipe 101 and the gas collecting main pipe 201 are arranged on both sides of the heat exchanger 12 to reduce mutual interference between the two and separate the structure and function. The gas collecting branch pipe 202 is connected to several coils in the heat exchanger 12, and is used to circulate the gaseous refrigerant between the external unit a and the heat exchanger 12 by collecting the gas collecting main pipe 201.

[0045] The four-way valve unit 3 includes a valve body 301, an air conditioning connecting pipe 302 disposed on the valve body 301 and used to connect to the gas collecting main pipe 201, a low-pressure connecting pipe 303 disposed on the valve body 301 and used to connect to the low-pressure pipe d of the external unit, and a floor heating connecting pipe 304 disposed on the valve body 301 and used to connect to the floor heating coil b. The four-way valve unit 3 can be implemented in the form of three groups of solenoid valves, two groups of solenoid valves make the inlet and outlet of the floor heating coil b connected to the low-pressure pipe d of the external unit and the gas collecting main pipe 201 respectively, and one group of solenoid valves is used to connect to the gas collecting main pipe 201, but the control of the valve body is increased; similarly, a three-way valve + a group of solenoid valves can be used as a replacement.

[0046] In this embodiment, the valve body 301 serves as the main control structure for the flow of refrigerant, the air conditioning connecting pipe 302 is connected to the gas collecting main pipe 201, the low pressure connecting pipe 303 is connected to the low pressure pipe d of the external unit, and the floor heating connecting pipe 304 is connected to the inlet and outlet of the floor heating coil b. When the valve body 301 is not energized, the air conditioning connecting pipe 302 and the low pressure connecting pipe 303 are in a connected state, and the air conditioning is in a cooling / heating process alone; when the solenoid valve coil of the valve body 301 is energized, the air conditioning connecting pipe 302-the floor heating connecting pipe 304-the low pressure connecting pipe 303 are in a connected state, and the air conditioning and floor heating are in a simultaneous cooling / heating process.

[0047] The refrigerant liquid pipe unit 1 further includes a branch pipe 102 disposed on the main liquid pipe 101 and used for connecting to the heat exchanger 12 .

[0048] In this embodiment, the purpose of the diversion pipe 102 is to divide into multiple pipelines so that the single pipeline of the main liquid pipe 101 is not too long, which affects the heat exchange effect.

[0049] The gas collecting pipe unit 2 further includes a three-way valve 203 which is arranged on the gas collecting main pipe 201 and has one end connected to the air conditioning connecting pipe 302 .

[0050] In this embodiment, two ends of the three-way valve 203 are respectively connected to the gas collecting main pipe 201 and the air conditioning connecting pipe 302, and the other end serves as a spare port for connecting the pipeline.

[0051] The other end of the three-way valve 203 is also provided with a one-way connection valve 4 for connecting to the external low-pressure pipe d.

[0052] In this embodiment, the one-way connection valve 4 is connected in parallel with the four-way valve unit 3 through the three-way valve 203. When the air conditioner is in cooling state, the refrigerant in the gas collecting main pipe 201 can flow into the low-pressure pipe d of the external unit through the one-way connection valve 4. Fig.11 and attached Fig.12As shown, the refrigerant in the gas collecting main 201 can be transported to the external unit a through the one-way connecting valve 4 alone, and can also be used as a refrigerant flow branch of the four-way valve unit 3. When the air conditioner is used for cooling alone or the air conditioner + floor heating are used for cooling at the same time, the refrigerant is diverted through the three-way valve 203 and transported to the external unit a through the four-way valve unit 3 and the one-way connecting valve 4.

[0053] The low-pressure connecting pipe 303 is also provided with a connecting valve 5 for connecting the external low-pressure pipe d and the one-way connecting valve 4 .

[0054] In this embodiment, the connecting valve 5 serves as a conversion interface between the external unit low-pressure pipe d, the low-pressure connecting pipe 303 and the one-way connecting valve 4 to simplify the structure. Since the one-way connecting valve 4 is a one-way flow, it is only necessary to consider whether it is connected during cooling.

[0055] The chassis 11 is also provided with a water receiving plate 6 for collecting condensed water outside the heat exchanger 12 .

[0056] In this embodiment, when the air outside the heat exchanger 12 forms condensed water after heat exchange, it is collected by the water receiving plate 6, and the condensed water can be discharged through the water outlet 7 by a water pump. The water receiving plate 6 adopts a foam water receiving tray, which can be connected to the lower position of the refrigerant liquid pipe unit 1, the gas collecting pipe unit 2 and the four-way valve unit 3. An upper foam plate can also be set above the heat exchanger 12.

[0057] The floor heating coil b is made of capillary copper tube.

[0058] In this embodiment, the floor heating coil b is made of capillary copper tube to ensure the safe circulation of refrigerant. Capillary copper tube refers to a structure that uses capillary copper tube as a direct heat exchange. Compared with conventional water heating, it lacks a "copper tube-water pipe" heat exchange process, and has higher heat exchange efficiency. At the same time, it avoids a series of problems such as freezing, leakage, scaling, and maintenance associated with the water channel. One of the external units a can be connected in series with multiple air-conditioning indoor unit systems, so that each of the air-conditioning indoor unit systems is an independent system. Two groups of air-conditioning indoor unit systems can also be used, one group is responsible for air-conditioning cooling / heating / dehumidification, and the other group is responsible for floor heating or other heating methods.

[0059] The embodiments of the present invention are described in detail above in conjunction with the accompanying drawings, but the present invention is not limited to the above embodiments. Various modifications can be made within the knowledge of ordinary technicians in the technical field without departing from the purpose of the present invention. These are all non-creative modifications and are protected by patent law as long as they are within the scope of the claims of the present invention.

Claims

1. An air-conditioning indoor unit system connected to floor heating, comprising a chassis (11) and a heat exchanger (12), characterized in that: It also includes a refrigerant liquid pipe unit (1) arranged on the chassis (11) and having two ends respectively connected to an external high-pressure pipe (c) and the heat exchanger (12), a gas collecting pipe unit (2) arranged on the heat exchanger (12), and a four-way valve unit (3) arranged on the gas collecting pipe unit (2) and used for connecting to an external low-pressure pipe (d) and / or a floor heating coil (b).

2. The air-conditioning indoor unit system connected to floor heating according to claim 1, characterized in that: The refrigerant liquid pipe unit (1) comprises a main liquid pipe (101).

3. The air-conditioning indoor unit system connected to floor heating according to claim 1, characterized in that: The gas collecting pipe unit (2) comprises a gas collecting main pipe (201) and a plurality of gas collecting branch pipes (202) arranged on the gas collecting main pipe (201) and used for connecting to the heat exchanger (12).

4. The air-conditioning indoor unit system connected to floor heating according to claim 3, characterized in that: The four-way valve unit (3) comprises a valve body (301), an air conditioning connecting pipe (302) arranged on the valve body (301) and used to be connected to the gas collecting main pipe (201), a low-pressure connecting pipe (303) arranged on the valve body (301) and used to be connected to the external unit low-pressure pipe (d), and a floor heating connecting pipe (304) arranged on the valve body (301) and used to be connected to the floor heating coil (b).

5. The air-conditioning indoor unit system connected to floor heating according to claim 2, characterized in that: The refrigerant liquid pipe unit (1) further comprises a branch pipe (102) arranged on the main liquid pipe (101) and used for connecting to the heat exchanger (12).

6. The air-conditioning indoor unit system connected to floor heating according to claim 4, characterized in that: The gas collecting pipe unit (2) further comprises a three-way valve (203) which is arranged on the gas collecting main pipe (201) and has one end connected to the air conditioning connecting pipe (302).

7. The air-conditioning indoor unit system connected to floor heating according to claim 6, characterized in that: The other end of the three-way valve (203) is also provided with a one-way connection valve (4) for connecting to the low-pressure pipe (d) of the external unit.

8. The air-conditioning indoor unit system connected to floor heating according to claim 7, characterized in that: The low-pressure connecting pipe (303) is also provided with a connecting valve (5) for connecting the external machine low-pressure pipe (d) and the one-way connecting valve (4).

9. The air-conditioning indoor unit system connected to floor heating according to claim 1, characterized in that: The chassis (11) is also provided with a water receiving plate (6) for collecting condensed water outside the heat exchanger (12).

10. The air-conditioning indoor unit system connected to floor heating according to claim 1, characterized in that: The floor heating coil (b) is made of capillary copper tube.

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