CN201852356U - Water heater of air conditioner - Google Patents

Abstract

The utility model provides an air conditioner water heater, which includes a compressor, a water heat exchanger, an indoor unit, an outdoor heat exchanger, a first four-way valve, a second four-way valve, a first electronic expansion valve, and a second electronic expansion valve , the indoor unit includes an indoor heat exchanger and an indoor electronic expansion valve that are "connected in series" to each other. The refrigerant outlet of the compressor is connected to the first port of the second four-way valve, the second port of the second four-way valve is connected to one end of the water heat exchanger, and the other end of the water heat exchanger is connected to the indoor air through the second electronic expansion valve. The other end of the indoor unit is connected to the second port of the first-way valve, the fourth port of the first four-way valve is connected to the refrigerant inlet of the compressor, and one end of the outdoor heat exchanger passes through the first electronic expansion valve. Connected between the second electronic expansion valve and the indoor unit, the other end is connected to the third port of the first four-way valve, and the first port of the first four-way valve is connected to the compressor and the first port of the second four-way valve Between, the third port of the second four-way valve is closed.

Description

Air conditioner water heater

technical field

The utility model relates to an air-conditioning water heater and a control method thereof, in particular to a water heater with refrigeration (air cooling alone), heating (air heating alone), hot water heating (hot water heating alone), cooling and heating An air-conditioning water heater with five functional modes of water (cooling air and making hot water at the same time), heating and heating water (heating indoor air and making hot water at the same time).

Background technique

In the prior art, an air conditioner water heater that combines the functions of an air conditioner and a water heater has been widely used. For example, FIG. 1 shows a schematic structural diagram of an air conditioner water heater in the prior art. As shown in Figure 1, the air conditioner water heater has a compressor com (multiple units can be connected in parallel), four-way valve 4wv, solenoid valve sv2, indoor heat exchanger i/d exc (multiple units can be connected in parallel), electronic expansion valve LEV1, Outdoor heat exchanger o/u exc, water heat exchanger water-exc, solenoid valve sv1. In different function modes, the refrigerant flow of the air conditioner water heater is different, as follows:

Cooling mode:

Compressor com→four-way valve 4wv→outdoor heat exchanger o/u-exc→electronic expansion valve lev1→indoor heat exchanger i/d exc→solenoid valve sv2→compressor com

Heating mode:

Compressor com→four-way valve 4wv→solenoid valve sv2→indoor heat exchanger i/d exc→electronic expansion valve lev1→outdoor heat exchanger o/u-exc→compressor com

Hot water heating mode: compressor com→solenoid valve sv1→water heat exchanger water exc→electronic expansion valve lev1→outdoor heat exchanger o/u exc→compressor com

Cooling and hot water mode:

Heating and hot water mode:

However, the air-conditioning water heaters in the prior art above have the following disadvantages: in the mode of cooling and heating hot water, part of the refrigerant enters the room after being condensed by the outdoor heat exchanger, and the other part enters the room after being condensed by the water heat exchanger. The refrigerant is divided into two paths, respectively. Performing different functions, the heat absorbed in the room is not effectively used, and the overall efficiency of the air conditioner and water heater is low.

Utility model content

In view of this, the main purpose of the present utility model is to provide an air-conditioning water heater, which can effectively use the heat absorbed in the room to heat water, and improve the overall efficiency of the air-conditioning water heater.

In order to achieve the above object, the utility model adopts the following technical solutions:

Technical solution 1: Air conditioner water heater includes: compressor, water heat exchanger, indoor unit, outdoor heat exchanger, first four-way valve, second four-way valve, first electronic expansion valve, second electronic expansion valve, indoor unit Including indoor heat exchangers and indoor electronic expansion valves "series" with each other, the first four-way valve and the second four-way valve have the first port, the second port, the third port, and the fourth port respectively, and the first four-way valve The valve and the second four-way valve can be switched between the first state and the second state respectively, the first state refers to the state in which the first port communicates with the third port and the second port communicates with the fourth port, and the second state This refers to a state where the first port is connected to the second port, and the third port is connected to the fourth port. The refrigerant outlet of the compressor is connected to the first port of the second four-way valve, the second port of the second four-way valve is connected to one end of the water heat exchanger, and the other end of the water heat exchanger passes through the second electronic expansion valve One end of the indoor unit is connected, the other end of the indoor unit is connected to the second port of the first four-way valve, the fourth port of the first four-way valve is connected to the refrigerant inlet of the compressor, and one end of the outdoor heat exchanger passes through The first electronic expansion valve is connected between the second electronic expansion valve and the indoor unit, and the other end is connected to the third port of the first four-way valve, and the first port of the first four-way valve is connected between the compressor and the second four-way valve. Between the first ports of the valve, the third port of the second four-way valve is closed.

The air-conditioning water heater of the utility model described in technical solution 1 can effectively use the heat absorbed in the room for heating water, and improve the overall efficiency of the air-conditioning water heater.

Technical solution 2: On the basis of technical solution 1, the air-conditioning water heater of technical solution 2 further includes a solenoid valve, one end of which is connected between the first electronic expansion valve and the second electronic expansion valve, and the other end passes through the second electronic expansion valve. 2 The capillary is connected with the refrigerant inlet of the compressor.

By adopting the structure of the electromagnetic valve described in technical solution 2, when the amount of refrigerant is small (such as a leak somewhere in the system), the electromagnetic valve is turned on to deliver refrigerant to the compressor, so that the amount of refrigerant in the compressor reaches Require.

Technical solution 3: On the basis of technical solution 1, in the air-conditioning water heater of technical solution 3, the fourth port of the second four-way valve is connected through the refrigerant inlet of the first capillary compressor.

By adopting the air-conditioning water heater of the utility model described in technical solution 3, when it is necessary to remove the frost on the side of the outdoor unit, the first capillary can form a complete defrosting passage, which can make the refrigerant flow in the system at a relatively low Flow or speed circulation, use the high temperature refrigerant output from the compressor to remove the frost on the side of the outdoor unit.

Description of drawings

Fig. 1 is the structural representation of the air-conditioning water heater of prior art;

Fig. 2 is a schematic structural view of the air conditioner water heater in this embodiment.

Detailed ways

Next, the structure of the air-conditioning water heater of this embodiment will be described with reference to the drawings. Figure 2 is a schematic diagram of the structure of the air conditioner water heater of the present invention. For the sake of convenience, in the following description, the connection of various components through pipes is only described as "connection", that is, "connection" in the following description refers to connection through pipes. As shown in Figure 2, the air conditioner water heater in this embodiment includes: compressor com, water heat exchanger water exc, outdoor heat exchanger o/u exc, indoor unit, first four-way valve 4wv1, second four-way valve 4wv2 , the first electronic expansion valve lev1, and the second electronic expansion valve lev2. Wherein, the compressor has a refrigerant outlet and a refrigerant inlet, and the indoor unit includes an indoor heat exchanger i/d exc and an indoor electronic expansion valve, and the indoor heat exchanger i/d exc and the indoor electronic expansion valve are in a "series" relationship. The first four-way valve 4wv1 and the second four-way valve 4wv2 have four inlet and outlet ports respectively, the first port d, the second port c, the third port e, and the fourth port s, which can be switched between the first state and the second state. switch, the first state refers to the state in which the first port d communicates with the third port c and the second port e communicates with the fourth port s, and the second state refers to the state in which the first port d communicates with the second port e and the third port The state in which port c is connected to the fourth port s.

The refrigerant outlet of the compressor is connected to the first port d of the second four-way valve, and the second port e of the second four-way valve 4wv2 is connected to one end of the water heat exchanger, and the other end of the water heat exchanger passes through the second One end of the electronic expansion valve is connected to the indoor unit, the other end of the indoor unit is connected to the second port e of the first four-way valve, and the fourth port s of the first four-way valve 4wv1 is connected to the refrigerant inlet of the compressor. One end of the outdoor heat exchanger is connected between the second electronic expansion valve and the indoor unit through the first electronic expansion valve, and the other end is connected to the third port c of the first four-way valve 4wv1. The first port d of the first four-way valve 4wv1 is connected between the compressor and the first port d of the second four-way valve 4wv2. The third port c of the second four-way valve 4wv2 is closed. In this embodiment, the closing of the third port c of the second four-way valve 4wv2 is realized by welding.

Each working mode of the air conditioner water heater of the present invention will be described below.

【Cooling Mode】

The first four-way valve 4wv1 is de-energized and switched to the first state (the first port d communicates with the third port c and the second port e communicates with the fourth port s), and the second four-way valve 4wv2 is de-energized and switched to the first state (the first port d communicates with the third port c and the second port e communicates with the fourth port s), the first electronic expansion valve lev1 is opened, the second electronic expansion valve lev2 is closed, and the indoor electronic expansion valve lev3 is opened, so that the air conditioner The water heater is placed in cooling mode.

In cooling mode, the compressor com consumes electric energy to output high-temperature and high-pressure gaseous refrigerant, and the high-temperature and high-pressure gaseous refrigerant enters the outdoor heat exchanger o/u exc through the first port d and the third port c of the first four-way valve 4wv1 , is condensed into a high-pressure medium-temperature liquid refrigerant in the outdoor heat exchanger o/u exc, and then the high-pressure medium-temperature liquid refrigerant enters the indoor unit and is throttled by the indoor electronic expansion valve lev3 of the indoor unit to become a low-temperature and low-pressure liquid refrigerant. The low-temperature and low-pressure liquid refrigerant enters the indoor heat exchanger i/d exc, is evaporated into a low-temperature and low-pressure gas refrigerant in the indoor heat exchanger i/d exc, and finally passes through the second port e and the second port of the first four-way valve 4wv1 4 port s returns to the compressor com to complete a complete refrigeration cycle. Among them, the process of evaporating low-temperature and low-pressure liquid refrigerant in the indoor heat exchanger i/d exc is the process of absorbing indoor heat, that is, cooling. The heat absorbed in the indoor heat exchanger i/d exc is discharged to the outdoor side through the outdoor heat exchanger o/u exc.

In the cooling mode, the refrigerant process of the air-conditioning water heater of the present invention is as follows:

Compressor com→1st four-way valve 4wv1 (1st port d→3rd port c)→outdoor heat exchanger o/u exc→1st electronic expansion valve lev1→indoor unit (indoor electronic expansion valve lev3→indoor heat exchange device i/d exc)→1st four-way valve 4wv1 (2nd port e→4th port s)→compressor com

【Heating Mode】

Switch the first four-way valve 4wv1 to the second state (the first port d is connected to the second port e and the third port c is connected to the fourth port s), and the second four-way valve 4wv2 is switched to the first state by de-energizing (the first port d communicates with the third port c and the second port e communicates with the fourth port s), the first electronic expansion valve lev1 is opened, the second electronic expansion valve lev2 is closed, and the indoor electronic expansion valve lev3 is opened, so that the air conditioner The water heater is placed in heating mode.

In the heating mode, the compressor com consumes electric energy to output high-temperature and high-pressure gaseous refrigerant, and the high-temperature and high-pressure gaseous refrigerant enters the indoor unit (indoor heat exchanger) through the first port d and the second port e of the first four-way valve 4wv1 i/d exc and indoor electronic expansion valve lev3), the heat released in the indoor heat exchanger i/d exc is condensed into a high-pressure medium-temperature liquid refrigerant, and then throttled by the first electronic expansion valve lev1 into a low-temperature and low-pressure liquid Refrigerant, the low-temperature and low-pressure liquid refrigerant enters the outdoor heat exchanger o/u exc, is evaporated into a low-temperature and low-pressure gaseous refrigerant in the outdoor heat exchanger o/u exc, and finally passes through the third port c of the first four-way valve 4wv1 Return to the compressor com with the 4th port to complete a complete heating cycle. Among them, the condensation process of high-temperature and high-pressure gaseous refrigerant in the indoor heat exchanger i/d exc is the process of releasing heat to the room, that is, heating.

In the heating mode, the refrigerant process of the air-conditioning water heater of the present invention is as follows:

Compressor com→1st four-way valve 4wv1 (1st port d→2nd port e)→indoor unit (indoor heat exchanger i/d exc→indoor electronic expansion valve lev3)→1st electronic expansion valve lev1→outdoor exchange Heater o/u exc → 1st four-way valve (3rd port c → 4th port s) → compressor com

【Hot water heating mode】

The first four-way valve 4wv1 is switched to the second state (the first port d communicates with the second port e and the third port c communicates with the fourth port s), and the second four-way valve 4wv2 is switched to the second state ( The first port d communicates with the second port e and the third port c communicates with the fourth port s), the first electronic expansion valve lev1 is opened, the second electronic expansion valve lev2 is opened, and the indoor electronic expansion valve lev3 is closed, so that the air conditioner and water heater Put it in hot water mode.

In hot water heating mode, the compressor com consumes electric energy to output high-temperature and high-pressure gaseous refrigerant, and the high-temperature and high-pressure gaseous refrigerant enters the water heat exchanger water exc. Heat is released in the water heat exchanger warter exc to heat the water and then condensed into a high-pressure medium-temperature liquid refrigerant, which is then throttled into a low-temperature and low-pressure liquid refrigerant through the first electronic expansion valve lev1, and then enters the outdoor heat exchanger o/u exc, is evaporated into low-temperature and low-pressure gaseous refrigerant in the outdoor heat exchanger o/u exc, and finally returns to the compressor com through the third port c and fourth port s of the first four-way valve 4wv1 to complete a complete system Hot water circulation process. Among them, the process of condensing the high-temperature and high-pressure gaseous refrigerant in the water heat exchanger is the process of releasing heat to heat water, that is, to make hot water.

In the hot water heating mode, the refrigerant process of the air-conditioning water heater of the present invention is as follows:

Compressor com→four-way valve 4wv2 (1st port d→2nd port e)→water heat exchanger warter exc→2nd electronic expansion valve lev2→1st electronic expansion valve lev1→outdoor heat exchanger o/u exc→ 1st four-way valve (3rd port c→4th port s)→compressor com

【Cooling and hot water mode】

The first four-way valve 4wv1 is de-energized and switched to the first state (the first port d is connected to the third port c and the second port e is connected to the fourth port s), and the second four-way valve 4wv2 is switched to the second state by power-on (the first port d communicates with the second port e and the third port c communicates with the fourth port s), the first electronic expansion valve lev1 is closed, the second electronic expansion valve lev2 is opened, and the indoor electronic expansion valve lev3 is opened, so that The air conditioner water heater is placed in cooling and hot water mode.

In the mode of cooling and heating hot water, the compressor com consumes electric energy to output high-temperature and high-pressure gaseous refrigerant, and the high-temperature and high-pressure gaseous refrigerant enters the water heat exchanger through the first port d and the second port e of the second four-way valve , heat is released in the water heat exchanger warter exc to heat the water and then condensed into a high-pressure and medium-temperature liquid refrigerant, which is throttled into a low-temperature and low-pressure liquid refrigerant through the indoor electronic expansion valve lev3 and then enters the room for heat exchange In the indoor heat exchanger i/d exc, the low-temperature and low-pressure liquid refrigerant evaporates into a low-temperature and low-pressure gaseous refrigerant, and finally returns to the compressor through the second port e and the fourth port s of the first four-way valve In the machine com, a complete cooling and hot water cycle process is completed. Among them, the process of evaporating the low-temperature and low-pressure liquid refrigerant in the indoor heat exchanger i/d exc is the process of absorbing indoor heat, that is, cooling. After absorbing heat indoors, the refrigerant returns to the compressor com, and then becomes high-temperature and high-pressure Gaseous to heat water. It can be seen that the heat absorbed from the room is utilized to heat water in the water heat exchanger water exc, which realizes the effective use of heat, reduces the energy consumption of the overall air-conditioning water heater, and improves its efficiency.

In the mode of cooling and heating hot water, the refrigerant process of the air-conditioning water heater of the present invention is as follows:

Compressor com→four-way valve 4wv2 (1st port d→2nd port e)→water heat exchanger water exc→2nd electronic expansion valve lev2→indoor unit (indoor electronic expansion valve lev3→indoor heat exchanger i/d exc)→1st four-way valve (2nd port e→4th port s)→compressor com

【Heating and hot water mode】

The first four-way valve 4wv1 is switched to the second state (the first port d communicates with the second port e and the third port c communicates with the fourth port s), and the second four-way valve 4wv2 is switched to the second state ( The first port d communicates with the second port e and the third port c communicates with the fourth port s), the first electronic expansion valve lev1 is opened, the second electronic expansion valve lev2 is opened, and the indoor electronic expansion valve lev3 is opened, so that the air conditioner and water heater Put it in heating and hot water mode.

In the heating and hot water mode, the compressor com consumes electricity to output high-temperature and high-pressure gaseous refrigerant, and part of the high-temperature and high-pressure gaseous refrigerant enters the room for heat exchange through the first port d and the second port e of the first four-way valve 4wv1 In the indoor heat exchanger i/d exc, it is condensed into a high-pressure and medium-temperature liquid refrigerant in the indoor heat exchanger i/d exc, and the other part enters the water heat exchanger water exc through the first port d and the second port e of the second four-way valve , release heat in the water heat exchanger warter exc to heat the water, and then pass through the second electronic expansion valve lev2 to merge with the refrigerant flowing through the side of the indoor heat exchanger i/d exc, and the merged refrigerant is absorbed by the first electronic expansion valve lev1 The low-temperature and low-pressure liquid refrigerant enters the outdoor heat exchanger o/u exc, is evaporated into a low-temperature and low-pressure gaseous refrigerant in the outdoor heat exchanger o/u exc, and finally passes through the third port c of the first four-way valve 4wv1 And the 4th port s returns to the compressor com to complete a complete heating and hot water circulation process. Among them, the process of high-temperature and high-pressure gaseous refrigerant being condensed in the indoor heat exchanger i/d exc is the process of releasing heat to heat the indoor air, that is, the process of heating, and the process of releasing heat in the water heat exchanger warter exc is the process of heating water. heating process.

In the heating and hot water mode, the refrigerant process of the air-conditioning water heater of the present invention is as follows:

In this embodiment, the air conditioner water heater also has a solenoid valve sv, one end of the solenoid valve sv is connected between the first electronic expansion valve lev1 and the second electronic expansion valve lev2, and the other end is connected to the compressor com through the first capillary ct1 Between the 4th port s of the 1st four-way valve 4wv1. When the amount of refrigerant is small (such as a leak somewhere in the system), the solenoid valve sv is connected to deliver refrigerant to the compressor com, so that the amount of refrigerant flowing into the compressor is sufficient, and due to the current limiting effect of the first capillary ct1, The refrigerant will not flow excessively to the compressor through the electromagnetic valve sv, and will not affect other functions of the air conditioner water heater.

In addition, in the present embodiment, the fourth port s of the second four-way valve is connected between the fourth port s of the first four-way valve 4wv1 and the compressor through the second capillary ct2. The second capillary ct2 connected to the fourth port s of the second four-way valve has no effect when the air conditioner water heater is running normally, but when the whole system does not have an indoor air conditioner (for example, the user does not need refrigeration in winter, the indoor air conditioner can be turned off The local system in which it is located), when there is only floor heating or water heaters, in the case of long-term low-temperature hot water heating, the condenser of the external unit will have frosting. When defrosting is required, the capillary forms a complete defrosting The passage can make the refrigerant circulate in the system at a lower flow rate or speed, and use the high-temperature refrigerant output from the compressor to remove the frost on the side of the outdoor unit. At this time, the first four-way valve 4wv1 is switched to the first state, the second four-way valve 4wv2 is switched to the first state, the first electronic expansion valve lev1 is opened, the second electronic expansion valve lev2 is opened, and the third electronic expansion valve lev3 is closed , the refrigerant circulation process is as follows:

Compressor com→1st four-way valve 4wv1 (1st port d→3rd port c)→outdoor heat exchanger o/u exc→1st electronic expansion valve lev1→2nd electronic expansion valve lev2→water heat exchanger water exc→2nd four-way valve 4wv2 (2nd port e→4th port s)→compressor com.

It can be seen that the high-temperature and high-pressure refrigerant flowing out of the refrigerant outlet of the compressor com directly flows to the outdoor unit (outdoor heat exchanger o/u exc, first electronic expansion valve lev1), thereby removing the frost on the outdoor unit.

Claims (3)

1. An air-conditioning water heater, characterized in that it includes: a compressor, a water heat exchanger, an indoor unit, an outdoor heat exchanger, a first four-way valve, a second four-way valve, a first electronic expansion valve, and a second electronic expansion valve. Expansion valve, the indoor unit includes an indoor heat exchanger and an indoor electronic expansion valve that are "connected in series", and the first four-way valve and the second four-way valve have a first port, a second port, a third port, The fourth port, and the first four-way valve and the second four-way valve can be switched between the first state and the second state respectively, the first state means that the first port is connected to the third port and the second port is connected to the second port. The state that the 4th port is connected, this 2nd state refers to the state that the 1st port is connected with the 2nd port and the 3rd port is connected with the 4th port, The refrigerant outlet of the compressor is connected to the first port of the second four-way valve, the second port of the second four-way valve is connected to one end of the water heat exchanger, and the other end of the water heat exchanger passes through the second electronic expansion valve One end of the indoor unit is connected, the other end of the indoor unit is connected to the second port of the first four-way valve, the fourth port of the first four-way valve is connected to the refrigerant inlet of the compressor, and one end of the outdoor heat exchanger passes through The first electronic expansion valve is connected between the second electronic expansion valve and the indoor unit, and the other end is connected to the third port of the first four-way valve, and the first port of the first four-way valve is connected between the compressor and the second four-way valve. Between the first ports of the valve, the third port of the second four-way valve is closed. 2. The air conditioner water heater according to claim 1, further comprising a solenoid valve, one end of which is connected between the check valve, the first electronic expansion valve, and the second electronic expansion valve, and the other end It is connected to the refrigerant inlet of the compressor through the second capillary tube. 3. The air conditioner water heater according to claim 1, wherein the fourth port of the second four-way valve is connected to the refrigerant inlet of the compressor through the first capillary tube.

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