CN102425882A - Heat recovery multiple heat pump air-conditioning hot water machine and floor heating system - Google Patents

Abstract

The invention discloses a heat recovery multiple heat pump air-conditioning hot water machine and floor heating system, comprising a compressor, a three-way valve, an outdoor heat exchanger, an indoor heat exchanger, multiple electronic expansion valves, multiple branch pipes and multiple electromagnetic valves, wherein a high-pressure air pipe and a high-pressure liquid pipe of the compressor are respectively connected with a heating water tank and a water fluorine heat exchanger through the branch pipes, the expansion valves and the electromagnetic valves; and the water fluorine heat exchanger is connected with a floor heating pipe network through an expansion water tank and a water pump. According to the invention, the electromagnetic valves are controlled to be switched on or switched off by an electric control device to switch a low-pressure air pipe and the high-pressure air pipe to be communicated with the indoor heat exchanger, so that the indoor heat exchanger cools or heats; the electromagnetic valves are controlled to be switched on or switched off by the electric control device to switch the high-pressure air pipe to be communicated with the heating water tank, so that the heating water tank prepares hot water for life; and the electromagnetic valves are controlled to be switched on or switched off by the electric control device to switch the high-pressure air pipe to be communicated with the water fluorine heat exchanger, so that the water fluorine heat exchanger prepares hot water for floor heating. The invention can realize the aims of air-conditioning refrigeration, air-conditioning heating, preparation of hot water for life and floor heating simultaneously.

Description

Heat recovery multi-connected heat pump air conditioner water heater plus floor heating system

technical field

The invention relates to a heat recovery multi-connected heat pump air conditioner hot water machine plus floor heating system, which belongs to the technical field of air conditioner environmental protection and energy saving.

Background technique

The existing multi-connected heat pump water heater is a kind of heat recovery air conditioner, but it has only four basic operation modes, that is, air conditioning cooling, air conditioning heating, hot water heating, air conditioning cooling + hot water heating. There are limitations in practical applications, and it is impossible to realize the functions of air conditioning heating + hot water heating or air conditioning heating + floor heating at the same time. In winter, some spaces need heating, and some spaces need hot water heating. At this time, the existing The multi-connected heat pump water heater system cannot be realized. At the same time, the existing multi-connected heat pump water heaters all use special water-fluorine heat exchangers to heat domestic hot water, and must be equipped with water pumps to supply water. The structure is complex, there are many hidden troubles, and the maintenance cost is high. If the heater is in contact with high-temperature hot water with poor water quality for a long time, it is easily affected by the water quality and produces a large amount of scale blockage, and it is difficult to clean, which will affect the heat exchange at least, and cause damage to the water-fluorine heat exchanger, leakage, or even explosion. In addition, a water pump must be used for water supply, which not only increases the power consumption of the system, but also the water pump is also affected by scale, so its reliability and life are not guaranteed. Existing multi-connected water heaters with domestic hot water + floor heating functions usually use the same water fluorine heat exchanger for domestic hot water and floor heating systems. Due to different water quality and water temperature requirements for domestic hot water and floor heating hot water, Therefore, one or two water-fluorine heat exchangers must be added to meet the different needs of domestic hot water and floor heating hot water, resulting in not only mutual interference between the two, but also extremely poor system efficiency and low reliability. The existing three-pipe heat recovery multi-connection unit can realize the simultaneous cooling and heating functions of air conditioning. It is also a heat recovery air conditioner, but it also has limitations. It can also not make hot water and has fewer applications. Chinese Patent Document No. CN101235993 disclosed a four-pipe heat pump and hot water three-purpose central air-conditioning system on August 6, 2008. It consists of a heat pump, a hot water unit, an evaporative cooling tower, an indoor heat exchanger, a condensing pump, and a freezing pump. Hot water circulation pump, hot water insulation box, heat pump, hot water unit is composed of compressor, hot water heat exchanger, condenser, filter, throttling mechanism, evaporator, evaporative cooling tower is composed of fin coil, cooling Composed of tower circulation pump and cooling fan. It is said that the three-purpose central air-conditioning system can provide four-pipe refrigerant, which can supply hot refrigerant, cold refrigerant, and domestic hot water throughout the year. It can flexibly adjust the room temperature and provide domestic hot water around the clock. However, its structure is very complicated, its manufacturing operation cost is high, and its reliability is poor. Therefore, it is necessary to make further improvements.

Contents of the invention

The purpose of the present invention is to provide a heat recovery system with simple and reasonable structure, low manufacturing cost, flexible installation, low operating cost, environmental protection and energy saving, and a wide range of applications, which can simultaneously realize the functions of air conditioning heating + domestic hot water + floor heating A multi-connected heat pump air-conditioning water heater plus a floor heating system overcomes the deficiencies in the prior art.

A heat recovery multi-connected heat pump air-conditioning hot water machine plus floor heating system designed for this purpose, including compressors, three-way valves, outdoor heat exchangers, indoor heat exchangers and multiple electronic expansion valves, branch pipes, solenoid valves ; One end of the three-way valve is connected to the high-pressure air pipe of the compressor, and the other end is connected to the outdoor heat exchanger, electronic expansion valve, branch pipe and indoor heat exchanger in sequence. Tubes, electronic expansion valves, and solenoid valves are connected to the heating water tank and the water-fluorine heat exchanger; the water-fluorine heat exchanger is connected to the floor heating pipe network through the expansion tank and the water pump;

There are more than two three-way valves, and the two three-way valves are connected in parallel to each other to form a connection circuit with the compressor. The input ends of the two three-way valves are connected with the high-pressure air pipe of the compressor, wherein: the first three-way valve The output end A is connected to the outdoor heat exchanger, the first electronic expansion valve, the first branch pipe, the second electronic expansion valve and the A end of the first indoor heat exchanger in sequence; the output end B of the first three-way valve is connected through the low pressure The air pipe is connected to the second branch pipe; the output end A of the second three-way valve is connected to the third branch pipe through the high-pressure air pipe.

The B end of the first branch pipe is connected in series with the fourth branch pipe, the B end of the third branch pipe is connected in series with the fifth branch pipe; the A end of the second branch pipe is connected in parallel with the A end of the third branch pipe It is then connected to the B end of the first indoor heat exchanger; the A end of the fourth branch pipe is connected to the A end of the second indoor heat exchanger; the B end of the second branch pipe and the A end of the fifth branch pipe are connected in parallel and then connected to the second The B end of the indoor heat exchanger; the sixth branch pipe is connected in series to the B end of the fourth branch pipe, and the seventh branch pipe is connected in series to the B end of the fifth branch pipe; the A end of the sixth branch pipe and the seventh branch pipe are connected in series. End A of the branch pipe is respectively connected to the heating water tank through the fourth electronic expansion valve and the fifth electromagnetic valve.

The side where the heating water tank is connected to the high-pressure air pipe is provided with a solenoid valve, and the side connected to the high-pressure liquid pipe is provided with an electronic expansion valve; as required, by adding branch pipes, electronic expansion valves, and solenoid valves, the system can connect multiple heating water tanks, and connect Multiple water-fluorine heat exchangers. The branch pipe connected to the A-end of the indoor heat exchanger is equipped with an electronic expansion valve, and the branch pipe connected to the B-end of the indoor heat exchanger is provided with a solenoid valve; as required, by adding branch pipes, electronic expansion valves, and solenoid valves, the system can be connected Multiple indoor heat exchangers.

The heating water tank is a pressure-bearing water tank heated by a refrigerant coil, and the heating water tank transfers heat through the refrigerant heating coil without connecting a special water-fluorine heat exchanger; For water supply, there is no need to set up a water pump; the floor heating system uses an independent water-fluorine heat exchanger and a closed circulation water circuit.

The invention controls the conduction or closure of the electromagnetic valve through the electric control device, switches the connection between the low-pressure air pipe and the high-pressure air pipe and the indoor heat exchanger, so that the indoor heat exchanger can cool or heat; the conduction of the electromagnetic valve is controlled by the electric control device Or close, switch the connection between the high-pressure air pipe and the heating water tank, so that the heating water tank can produce domestic hot water; control the conduction or closing of the solenoid valve through the electric control device, switch the connection between the high-pressure air pipe and the water fluorine heat exchanger, and make the water fluorine exchange The heater produces hot water for floor heating. It can realize the simultaneous operation of air conditioning refrigeration + air conditioning heating + domestic hot water production + floor heating.

The present invention integrates the existing heat pump water heater and three-pipe heat recovery technology, utilizes and recycles the waste heat of the air conditioning system, greatly enhances the effect of energy saving and emission reduction, and adopts a more advanced and reliable hot water heating method, At the same time, it meets the needs of efficient and reliable supply of domestic hot water and floor heating hot water. It is very flexible to meet the needs of different occasions.

Description of drawings

FIG. 1 is a system schematic diagram of an embodiment of the present invention.

In the figure: 1 is the compressor, 3 is the outdoor heat exchanger, 7 is the heating water tank, 9 is the high pressure liquid pipe, 10 is the low pressure air pipe, 11 is the high pressure air pipe, 12 is the water fluorine heat exchanger, 13 is the expansion tank, 14 is Water pump, 15 is the floor heating pipe network, 21 is the first three-way valve, 22 is the second three-way valve, 41 is the first electronic expansion valve, 42 is the second electronic expansion valve, 43 is the third electronic expansion valve, 44 is the fourth Electronic expansion valve, 45 is the fifth electronic expansion valve, 51 is the first solenoid valve, 52 is the second solenoid valve, 53 is the third solenoid valve, 54 is the fourth solenoid valve, 55 is the fifth solenoid valve, 56 is the sixth solenoid valve Solenoid valve, 61 is the first indoor heat exchanger, 62 is the second indoor heat exchanger, 81 is the first branch pipe, 82 is the second branch pipe, 83 is the third branch pipe, 84 is the fourth branch pipe, 85 86 is the sixth branch pipe, 87 is the seventh branch pipe, C is the hot water outlet, E is the insulation layer, F is the refrigerant heating plate, and G is the tap water inlet.

Detailed ways

The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

Referring to Fig. 1, a heat recovery multi-connected heat pump air-conditioning water heater plus floor heating system includes a compressor 1, a first three-way valve 21, a second three-way valve 22, an outdoor heat exchanger 3, and a first electronic expansion valve 41 to the fifth electronic expansion valve 45, the first solenoid valve 51 to the sixth solenoid valve 56, the first indoor heat exchanger 61, the second indoor heat exchanger 62, the heating water tank 7, the first branch pipe 81 to the seventh branch Pipe 87, high-pressure liquid pipe 9, low-pressure air pipe 10, high-pressure air pipe 11, water fluorine heat exchanger 12, expansion tank 13, water pump 14 and floor heating pipe network 15 constitute a multi-connected heat pump air-conditioning water heater system. The high-pressure air pipe 11 and high-pressure liquid pipe 9 of the compressor 1 are respectively connected to the heating water tank 7 and the water-fluorine heat exchanger 12 through branch pipes, electronic expansion valves, and solenoid valves; The pipe network 15 is connected.

The input ends of the two three-way valves are connected to the high-pressure air pipe 11 of the compressor 1, and the output end A of the first three-way valve 21 is connected to the outdoor heat exchanger 3, the first electronic expansion valve 41, and the first branch pipe 81 in sequence; The output end B of the first three-way valve 21 communicates with the second branch pipe 82 through the low-pressure air pipe 10 . The A end of the first branch pipe 81 is connected with the second electronic expansion valve 42 and the A end of the first indoor heat exchanger 61 in turn; the fourth branch pipe 84 is connected in series on the B end of the first branch pipe 81, The A end of the branch pipe 82 and the A end of the third branch pipe 83 are connected in parallel and then connected to the B end of the first indoor heat exchanger 61; the A end of the fourth branch pipe successively exchanges heat with the third electronic expansion valve 43 and the second indoor heat exchanger The A end of the device 62 is connected; the B end of the fourth branch pipe 84 is connected in series with the sixth branch pipe 86, and the A end of the sixth branch pipe 86 is connected to the heating water tank 7 through the fourth electronic expansion valve 44.

The output end A of the second three-way valve 22 communicates with the third branch pipe 83 through the high pressure air pipe 11 . The B end of the third branch pipe 83 is connected in series with the fifth branch pipe 85; the B end of the second branch pipe 82 and the A end of the fifth branch pipe are connected in parallel and then connected to the B end of the second indoor heat exchanger 62; A seventh branch pipe 87 is connected in series with end B of the branch pipe 85 , and end A of the seventh branch pipe 87 communicates with the heating water tank 7 through the fifth electromagnetic valve 55 . The heating water tank 7 is connected with tap water and hot water supply pipeline. The B ends of the sixth branch pipe 86 and the seventh branch pipe 87 are connected to the water-fluorine heat exchanger 12 through the fifth electronic expansion valve 45 and the sixth electromagnetic valve 56, and the water-fluorine heat exchanger 12 passes through the expansion tank 13 and the water pump 14, and Floor heating pipe network 15 is connected.

According to needs, the system can be connected with more indoor heat exchangers, heating water tank 7 and water-fluorine heat exchanger 12 by adding branch pipes, electronic expansion valves, and solenoid valves.

When the first three-way valve 21 and the second three-way valve 22 are adjusted, the electric control device controls the first solenoid valve 51 to be in the conduction state and the second solenoid valve 52 to be in the closed state, so that the low-pressure air pipe 10 exchanges heat with the first chamber The device 61 is connected, and at the same time, the opening degree of the second electronic expansion valve 42 is adjusted by the electronic control device, so that the first indoor heat exchanger 61 is in the cooling mode. The third electromagnetic valve 53 is controlled by the electronic control device to be in the closed state, and the fourth electromagnetic valve 54 is in the conductive state, so that the high-pressure gas pipe 11 is connected with the second indoor heat exchanger 62, and the third electronic expansion valve 43 is controlled by the electronic control device. The opening degree of the second indoor heat exchanger 62 is in the heating mode. The fifth electromagnetic valve 55 is controlled by the electronic control device to be in the conduction state, so that the high-pressure air pipe 11 is connected with the heating water tank 7, and at the same time, the opening degree of the fourth electronic expansion valve 44 is adjusted by the electronic control device, so that the heating water tank 7 is in the position of producing domestic heat. water pattern. The sixth electromagnetic valve 56 is controlled by the electronic control device to be in a conduction state, so that the high-pressure gas pipe 11 is communicated with the water-fluorine heat exchanger 12, and at the same time, the opening degree of the fifth electronic expansion valve 45 is adjusted by the electronic control device to make the water-fluorine heat exchanger 12 is in the mode of making hot water for floor heating. In this way, the first indoor heat exchanger 61 can exchange heat with the surrounding environment to lower the temperature of the surrounding environment to meet the cooling requirements; the second indoor heat exchanger 62 can exchange heat with the surrounding environment to increase the temperature of the surrounding environment to meet the heating requirements. The heating water tank 7 can heat the water in the water tank to the set temperature to meet people’s demand for domestic hot water; the water fluorine heat exchanger 12 is in the process of producing hot water for floor heating, and supplies it to the floor heating pipe network 15 through the water pump 14 Hot water meets people's needs for floor heating. Then the whole system can realize air conditioning cooling + air conditioning heating + domestic hot water + floor heating at the same time.

When the electric control device controls the second solenoid valve 52, the fourth solenoid valve 54, the fifth solenoid valve 55, and the sixth solenoid valve 56 to be in the closed state, the first solenoid valve 51 and the third solenoid valve 53 are in the conduction state, and the electric The control device controls the opening degree of the fourth electronic expansion valve 44 and the fifth electromagnetic expansion valve 45 to be 0, and the opening degree of the second electronic expansion valve 42 and the third electronic expansion valve 43 is adjusted by the electronic control device, so that the whole system is only in the air-conditioning and cooling mode .

When the electric control device controls the first solenoid valve 51, the third solenoid valve 53, the fifth solenoid valve 55, and the sixth solenoid valve 56 to be in the closed state, the second solenoid valve 52 and the fourth solenoid valve 54 are in the conduction state, and the electric The control device controls the opening degrees of the fourth electronic expansion valve 44 and the fifth electromagnetic expansion valve 45 to 0, and adjusts the opening degrees of the second electronic expansion valve 42 and the third electronic expansion valve 43 through the electronic control device, so that the whole system is only in the air-conditioning and heating mode. model.

When adjusting the first three-way valve 21, the second three-way valve 22, and controlling the first solenoid valve 51, the second solenoid valve 52, the third solenoid valve 53, the fourth solenoid valve 54, and the sixth solenoid valve 56 is in the closed state, the fifth electromagnetic valve 55 is in the conductive state, and the opening degree of the second electronic expansion valve 42, the third electromagnetic expansion valve 43, and the fifth electromagnetic expansion valve 45 are controlled by the electronic control device to be 0, and the electronic control device is used to adjust The opening degree of the fourth electronic expansion valve 44 makes the whole system only in the mode of air conditioner making domestic hot water.

When the first three-way valve 21 and the second three-way valve 22 are adjusted, and the first solenoid valve 51, the second solenoid valve 52, the third solenoid valve 53, the fourth solenoid valve 54, and the fifth solenoid valve are controlled by the electric control device 55 is in the closed state, the sixth solenoid valve 56 is in the conductive state, the opening degree of the second electronic expansion valve 42, the third electronic expansion valve 43, and the fourth electronic expansion valve 44 are controlled to be 0 by the electronic control device, and the opening degree of the second electronic expansion valve 42, the third electronic expansion valve 43, and the fourth electronic expansion valve The five electronic expansion valves are opened at 45 degrees, so that the whole system is only in the floor heating mode.

Therefore, the electronic control device controls the first solenoid valve 51, the second solenoid valve 52, the third solenoid valve 53, and the fourth solenoid valve 54 to switch on or off to switch between the low-pressure air pipe 10 and the high-pressure air pipe 11 and the first indoor heat exchanger 61. 1. The connection of the second indoor heat exchanger 62 enables the first indoor heat exchanger 61 and the second indoor heat exchanger 62 to cool or heat, and the fifth electromagnetic valve 55 is controlled on or off by the electric control device to switch The communication between the high-pressure air pipe 11 and the heating water tank 7 can make the heating water tank 7 produce domestic hot water; the sixth electromagnetic valve 56 is controlled on or off by the electric control device, and the communication between the high-pressure air pipe 11 and the water-fluorine heat exchanger 12 is switched. , can make the water-fluorine heat exchanger 12 prepare floor heating hot water. So that the whole system can realize 4 basic modes at the same time: air-conditioning refrigeration + air-conditioning heating + domestic hot water + floor heating, and the 4 basic operation modes can be combined arbitrarily.

Claims (6)

1. A heat recovery multi-connected heat pump air-conditioning water heater plus floor heating system, including a compressor (1), a three-way valve, an outdoor heat exchanger (3), an indoor heat exchanger, multiple electronic expansion valves, and branch pipes , solenoid valve; one end of the three-way valve communicates with the high-pressure air pipe (11) of the compressor, and the other end communicates with the outdoor heat exchanger, electronic expansion valve, branch pipe and indoor heat exchanger in sequence, and is characterized in that the high-pressure air pipe (11) of the compressor ), the high-pressure liquid pipe (9) are respectively connected with the heating water tank (7) and the water fluorine heat exchanger (12) through the branch pipe, the electronic expansion valve, and the electromagnetic valve; the water fluorine heat exchanger passes through the expansion water tank (13) and the water pump ( 14) be connected with the floor heating pipe network (15); There are more than two three-way valves, and the two three-way valves are connected in parallel to each other to form a connection circuit with the compressor (1), and the input ends of the two three-way valves are connected with the high-pressure air pipe (11) of the compressor (1) , the output end A of the first three-way valve (21) is sequentially connected to the outdoor heat exchanger (3), the first electronic expansion valve (41), the first branch pipe (81), the second electronic expansion valve (42) and the first The A ends of an indoor heat exchanger (61) are connected; the output B of the first three-way valve is connected to the second branch pipe (82) through the low-pressure air pipe (10); the output A of the second three-way valve (22) The third branch pipe (83) is communicated with by the high-pressure air pipe (11). 2. The heat recovery multi-connected heat pump air-conditioning hot water machine plus floor heating system according to claim 1, characterized in that the B end of the first branch pipe (81) is connected in series with a fourth branch pipe (84), The fifth branch pipe (85) is connected in series on the B end of the third branch pipe (83); the A end of the second branch pipe (82) and the A end of the third branch pipe (83) are connected in parallel and connected to the first indoor exchange The B end of the heat exchanger (61); the A end of the fourth branch pipe (84) communicates with the A end of the second indoor heat exchanger (62); the B end of the second branch pipe (82) and the fifth branch pipe (85 ) is connected in parallel to the B end of the second indoor heat exchanger (62); the B end of the fourth branch pipe (84) is connected in series with the sixth branch pipe (86), and the fifth branch pipe (85) The seventh branch pipe (87) is connected in series on the B end; the A end of the sixth branch pipe (86) and the A end of the seventh branch pipe (87) pass through the fourth electronic expansion valve (44) and the fifth electromagnetic valve respectively. (55) communicate with the heating water tank (7). 3. The heat recovery multi-connected heat pump air conditioner water heater plus floor heating system according to claim 2, characterized in that the B end of the sixth branch pipe (86) and the B end of the seventh branch pipe (87) are respectively The water-fluorine heat exchanger (12) is connected through the fifth electronic expansion valve (45) and the sixth electromagnetic valve (56). 4. The heat recovery multi-connected heat pump air-conditioning water heater plus floor heating system according to claim 3, characterized in that a solenoid valve is provided on the side where the heating water tank (7) is connected to the high-pressure air pipe (11), and is connected to the high-pressure liquid pipe ( 9) An electronic expansion valve is installed on the side; as required, by adding branch pipes, electronic expansion valves, and solenoid valves, the system can be connected to multiple heating water tanks (7) and multiple water-fluorine heat exchangers (12). 5. The heat recovery multi-connected heat pump air-conditioning hot water machine plus floor heating system according to any one of claims 1-4, characterized in that the branch pipe connected to the A end of the indoor heat exchanger is provided with an electronic expansion valve, which is connected to the indoor heat exchanger. The branch pipe at the B end of the heater is equipped with a solenoid valve; according to the needs, by adding branch pipes, electronic expansion valves, and solenoid valves, the system can be connected to multiple indoor heat exchangers. 6. The heat recovery multi-connected heat pump air-conditioning hot water machine plus floor heating system according to claim 5, characterized in that the heating water tank (7) is a pressure-bearing water tank heated by a refrigerant coil, and the heating water tank (7) passes through the refrigerant The heating coil conducts heat without connecting a special water-fluorine heat exchanger (12); the heating water tank (7) adopts a pressure-bearing insulated water tank, and uses the water pressure of tap water to directly supply water without setting up a water pump (14); floor heating The system adopts an independent water-fluorine heat exchanger (12) and a closed circulation water circuit.

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