CN205593032U - Heating installation - heat pump coupling water heater system - Google Patents

Abstract

The utility model relates to a heating-heat pump coupling water heater system consisting of a heat pump system and a water circuit; wherein the heat pump part includes a compressor, a condenser, a liquid storage device, a throttle valve, a first refrigerant side valve, and a second refrigerant side valve , outdoor evaporator, and indoor evaporator; the water circuit includes the first heat exchanger, the second heat exchanger, the first water side valve, the second water side valve, the third water side valve, the fourth water side valve, the storage The water bucket, the three-way valve, and the above-mentioned water circuit can be composed of three parts: a heat exchange water circuit, a heating circuit, and a hot water circuit. The water heater can be operated year-round. In the heating season, on the one hand, the heating water supply will be directly heated to produce hot water; on the other hand, the heating heat will be absorbed by the heat pump evaporator, and then compressed by the compressor to release heat in the condenser to produce hot water; In the non-heating season, the heat of the outdoor air will be absorbed by the heat pump evaporator, and then compressed by the compressor to release heat in the condenser to make hot water.

Description

A Heating-Heat Pump Coupled Water Heater System

technical field

The invention relates to a heating air-heat pump coupled water heater system, which belongs to the technical field of heat pump utilization.

Background technique

With the improvement of people's living standards, water heaters have become an inevitable choice for most families. At present, due to the reverse Carnot cycle, the heat pump water heater can recover the heat in the atmosphere, and has the effect of high efficiency and energy saving, and has been applied in many families. However, when the heat pump water heater is running in winter, due to the low outdoor ambient temperature, its operating evaporation temperature is low, the heat transfer surface is easy to frost, and the overall efficiency drops sharply. protected and unable to operate.

Considering that central heating is generally available in northern regions, most urban residents are equipped with radiators to heat the rooms, coupled with the continuous improvement of the heat exchange efficiency of radiators in recent years and the application of new heating methods such as floor heating, the comfort of residents' homes has been greatly improved. Improvement, and even some families need to open windows to dissipate heat due to high indoor temperature, and there is a phenomenon of residual heating heat. Recently, heating heat metering has also attracted attention, and some areas have begun to promote and apply it. This has changed the previous situation of charging heating fees based solely on the building area, and began to use heat that is more conducive to energy saving to bill, and it also provides residents with more energy in winter. It is possible to fully and rationally utilize the heating heat inside the house.

Contents of the invention

The purpose of the present invention is to overcome the above-mentioned deficiencies in the prior art and provide a heater-heat pump coupled water heater system. The technical solution of the invention is: use the heater to directly produce hot water in the winter heating season and use the heater to provide a heat source for the heat pump to produce Hot water. In summer, air is used as the heat source to produce hot water, so as to realize the comprehensive utilization of heating heat inside the house in winter, and use the heating heat to improve the working conditions of heat pump water heaters in winter, and provide domestic hot water for residents.

The technical principle of the present invention is: a heating-heat pump coupling water heater system has a heat pump system and a water circuit;

The heat pump part includes a compressor, a condenser, a liquid receiver, a throttle valve, a valve on the first refrigerant side, a valve on the second refrigerant side, an outdoor evaporator, and an indoor evaporator;

The water circuit includes a first heat exchanger, a second heat exchanger, a first water side valve, a second water side valve, a third water side valve, a fourth water side valve, a water storage tank, and a three-way valve. It can be composed of three parts: heat exchange water circuit, heating circuit and hot water circuit.

The specific heating system scheme is shown in Figure 1: a heating-heat pump coupled water heater system includes a heat pump system and a water circuit; the heat pump system includes a compressor 1, a condenser 2, a liquid receiver 3, a throttle valve 4, and a first refrigerant Side valve 5, second refrigerant side valve 6, outdoor evaporator 7, indoor evaporator 8;

The compressor 1 is connected to the condenser 2, the condenser 2 is connected to the accumulator 3, the accumulator 3 is connected to the throttle valve 4, the throttle valve 4 is connected to the outdoor evaporator 7 through the first refrigerant side valve 5, and the second refrigerant The side valve 6 is connected to the indoor evaporator 8, and the outdoor evaporator 7 and the indoor evaporator 8 are respectively connected to the compressor 1;

The water circuit includes a first heat exchanger 9-1, a second heat exchanger 9-2, a first water side valve 10-1, a second water side valve 10-2, a third water side valve 10-3, a fourth Water side valve 10-4, water storage bucket 11, three-way valve 12;

The tap water inlet is connected to the first water side valve 10-1, and the first water side valve 10-1 is respectively connected to the second water side valve 10-2, the fourth water side valve 10-4, the condenser 2, and the second water side valve 10-2 are respectively connected to the first heat exchanger 9-1, the fourth water side valve 10-4, and the condenser 2, the fourth water side valve 10-4 is connected to the water storage tank 11, the condenser 2 is connected to the three-way valve 12, and the three The through valve 12 is respectively connected to the water storage tank 11, the first heat exchanger 9-1, the water storage tank 11 is connected to the third water side valve 10-3, and the first heat exchanger 9-1 is respectively connected to the heating water inlet and the heating return water, the second The second heat exchanger 9-2, the second heat exchanger 9-2 is connected to the indoor evaporator 8;

The water circuit is divided into three parts: the heat exchange water circuit, the heating circuit and the hot water circuit. The connecting pipeline between the indoor evaporator 8 and the second heat exchanger 9-2 is the heat exchange water circuit; The heat exchanger 9-1 enters the second heat exchanger 9-2, and then enters the first heat exchanger 9-1 after coming out of the second heat exchanger 9-2, and then connects the pipeline of the heating return water to form the heating circuit; the rest of the water circuit pipelines form the hot water circuit.

Further, a temperature sensor, a liquid level sensor and an auxiliary electric heater are arranged in the water storage bucket.

Further, water pumps may also be provided in the heat exchange water circuit, the heating circuit and the hot water circuit in the present invention to force the water to flow therein.

Further, the indoor evaporator can be one of plate, shell and tube, sleeve and plate-fin heat exchangers, and/or the outdoor evaporator can be tube-fin and plate-fin heat exchangers One, and/or the condenser can adopt one of the forms of shell-and-tube, casing, plate, plate-fin, etc., and/or the throttle valve can be one of the forms of thermal valve and electronic expansion valve.

The water heater can be operated year-round. In the heating season, on the one hand, hot water will be directly heated through the heating water supply; In the non-heating season, the heat of the outdoor air will be absorbed by the heat pump evaporator, and then compressed by the compressor to release heat in the condenser to make hot water.

Through the above heating method and auxiliary electric heater, the heat pump water heater can not only directly turn the tap water into hot water at the required temperature, but also allow the water to circulate in the hot water circuit and absorb heat continuously when the circulation mode of the hot water circuit is turned on. temperature.

Compared with the prior art, the present invention has substantive features and significant progress: the present invention couples the heating and the heat pump to provide hot water by using the heat of the heating, which not only makes full use of the heat of the heating, but also fully utilizes and exerts the high-efficiency and energy-saving operation of the heat pump The advantage is that it overcomes the disadvantages that the efficiency of the heat pump water heater is greatly reduced or even unusable due to the low evaporation temperature when the heat pump water heater is running in winter. It has substantive features and significant progress.

Description of drawings

Fig. 1 is a schematic diagram of the principle of a heating-heat pump coupled water heater system in Embodiment 1. Among them, compressor 1, condenser 2, liquid receiver 3, throttle valve 4, first refrigerant side valve 5, second refrigerant side valve 6, outdoor evaporator 7, indoor evaporator 8, first heat exchange Device 9-1, second heat exchanger 9-2, first water side valve 10-1, second water side valve 10-2, third water side valve 10-3, fourth water side valve 10-4, Water storage barrel 11, three-way valve 12.

detailed description

The best implementation mode of the present invention will be described in detail below in conjunction with the accompanying drawings.

Example 1

As shown in Figure 1, a heating-heat pump coupled water heater system includes a heat pump system and a water circuit;

The heat pump system includes a compressor 1, a condenser 2, a liquid receiver 3, a throttle valve 4, a first refrigerant side valve 5, a second refrigerant side valve 6, an outdoor evaporator 7, and an indoor evaporator 8;

The compressor 1 is connected to the condenser 2, the condenser 2 is connected to the accumulator 3, the accumulator 3 is connected to the throttle valve 4, the throttle valve 4 is connected to the outdoor evaporator 7 through the first refrigerant side valve 5, and the second refrigerant The side valve 6 is connected to the indoor evaporator 8, and the outdoor evaporator 7 and the indoor evaporator 8 are respectively connected to the compressor 1;

The water circuit includes a first heat exchanger 9-1, a second heat exchanger 9-2, a first water side valve 10-1, a second water side valve 10-2, a third water side valve 10-3, a fourth Water side valve 10-4, water storage bucket 11, three-way valve 12;

The tap water inlet is connected to the first water side valve 10-1, and the first water side valve 10-1 is respectively connected to the second water side valve 10-2, the fourth water side valve 10-4, the condenser 2, and the second water side valve 10-2 are respectively connected to the first heat exchanger 9-1, the fourth water side valve 10-4, and the condenser 2, the fourth water side valve 10-4 is connected to the water storage tank 11, the condenser 2 is connected to the three-way valve 12, and the three The through valve 12 is respectively connected to the water storage tank 11, the first heat exchanger 9-1, the water storage tank 11 is connected to the third water side valve 10-3, and the first heat exchanger 9-1 is respectively connected to the heating water inlet and the heating return water, the second The second heat exchanger 9-2, the second heat exchanger 9-2 is connected to the indoor evaporator 8;

The water circuit is divided into three parts: the heat exchange water circuit, the heating circuit and the hot water circuit. The connecting pipeline between the indoor evaporator 8 and the second heat exchanger 9-2 is the heat exchange water circuit; The heat exchanger 9-1 enters the second heat exchanger 9-2, and then enters the first heat exchanger 9-1 after coming out of the second heat exchanger 9-2, and then connects the heating return water to form a heating circuit; The water circuit forms the hot water circuit.

When the water heater system operates during the heating season:

The control mode of the heat pump system is as follows, the first refrigerant side valve 5 is closed, the second refrigerant side valve 6 and the second water side valve 10-2 are opened, the refrigerant does not pass through the outdoor evaporator 7, but passes through the indoor evaporator 8.

The hot water circuit has a water supply mode and a circulation mode. In the water supply mode, the first water side valve 10-1 is opened, and the fourth water side valve 10-4 is closed; in the circulation mode, the first water side valve 10-1 is closed. The fourth water side valve 10-4 is opened. Regardless of the operation mode, if the user uses water, the third water side valve 10-3 is opened, otherwise the third water side valve 10-3 remains closed. When the third water side valve 10-3 is opened or the liquid level of the water storage bucket 11 is lower than 30% of the height of the bucket, the water filling mode is turned on; Measured by a level sensor.

The specific operation principle is as follows: In the heat pump system, the refrigerant flows out from the indoor evaporator 8, enters the compressor 1 and is compressed, and after obtaining high-temperature and high-pressure refrigerant gas, it enters the condenser 2, and heat is released in the condenser 2 to heat the incoming water , the obtained hot water flows out of the condenser 2 and enters the water storage tank 11 through the three-way valve 12. After the refrigerant releases heat, it becomes a liquid and flows out of the condenser 2, enters the liquid receiver 3, and then throttles through the throttle valve 4 to become a low temperature and low pressure The two-phase refrigerant, because the first refrigerant side valve 5 is closed, the refrigerant does not pass through the first refrigerant side valve 5, but enters the indoor evaporator 8 through the second refrigerant side valve 6, and in the indoor evaporator 8 After absorbing the heat of the water in the heat exchange circuit, it becomes a low-temperature and low-pressure gas, which enters the compressor 1 and continues to circulate.

In terms of the hot water circuit, in the water supply mode, the tap water is divided into two paths after passing through the first water side valve 10-1, and one path enters the first heat exchanger 9-1 through the second water side valve 10-2 to absorb heating water. After the heat is turned into hot water, it enters the water storage tank 11 through the three-way valve 12, and the other way enters the condenser 2. After absorbing the heat of the refrigerant, it becomes hot water and enters the water storage tank 11 through the three-way valve 12. The water storage tank 11 has auxiliary The electric heater is equipped with a temperature control knob on the outside of the water storage barrel 11, and the user can set different temperatures as required. When the heat pump water heater is running, if the water temperature in the water storage tank 11 is lower than the set value and the compressor 1 is not running, the compressor 1 will be turned on and put into operation. Auxiliary electric heater, otherwise turn off the auxiliary electric heater, if the water temperature in the barrel is higher than the user's set value, then turn off the compressor 1. A temperature sensor is arranged in the water storage barrel 11, and the temperature is measured by the temperature sensor arranged in the water storage barrel 11.

In circulation mode, since the fourth water side valve 10-4 is opened, the water in the water storage tank 11 will generate natural convection under the action of temperature difference, flow out from the water storage tank 11, and divide into water after passing through the fourth water side valve 10-4 Two paths, one path enters the first heat exchanger 9-1 through the second water side valve 10-2, absorbs the heat of heating water and becomes hot water, then enters the water storage tank 11 through the three-way valve 12, and the other path enters the condenser 2. After absorbing the heat of the refrigerant, it turns into hot water and enters the water storage tank 11 through the three-way valve 12 to form a cycle.

The water in the heat exchange water circuit absorbs the heating heat in the second heat exchanger 9-2, and then enters the indoor evaporator 8 to release heat to the refrigerant. After coming out, it enters the second heat exchanger 9-2 to absorb heat. The circulation continues under the action of natural convection. In the heating circuit, the heating water enters the first heat exchanger 9-1 and the second heat exchanger 9-2 in turn, flows out from the second heat exchanger 9-2 and then enters the first heat exchanger 9-1, and flows out Then enter the heating return water. In this circuit, the heating water heats hot water in the first heat exchanger 9-1 and heats the water in the heat exchange water circuit in the second heat exchanger 9-2.

When the water heater is operating during the non-heating season:

The first refrigerant side valve 5 of the heat pump system is opened, the second refrigerant side valve 6 and the second water side valve 10-2 are closed, and the refrigerant does not pass through the indoor evaporator 8, but passes through the outdoor evaporator 7.

The operation mode of the hot water circuit, that is, water supply mode and circulation mode, and the corresponding water side valve switch are the same as those in the heating season.

The specific operation principle is as follows: when the heat pump system is running, the refrigerant flows out from the outdoor evaporator 7, enters the compressor 1 to be compressed, and obtains high-temperature and high-pressure refrigerant gas, enters the condenser 2, and releases heat in the condenser 2 to heat the incoming water. The obtained hot water flows out of the condenser 2 and enters the water storage tank 11 through the three-way valve 12, and the refrigerant becomes a liquid, flows out of the condenser 2, enters the liquid receiver 3, and then throttles through the throttle valve 4 to become a low-temperature and low-pressure two-phase refrigeration Since the second refrigerant side valve 6 is closed, the refrigerant does not pass through the second refrigerant side valve 6, but enters the outdoor evaporator 7 through the first refrigerant side valve 5, and exchanges with the outdoor air in the outdoor evaporator 7. The heat, after absorbing the heat, becomes a low-temperature and low-pressure gas, which enters the compressor 1 and continues to circulate.

In terms of the hot water circuit, in the water supply mode, since the second water side valve 10-2 is closed, the tap water directly enters the condenser 2 after passing through the first water side valve 10-1, and becomes hot water after absorbing the heat of the refrigerant. The valve 12 enters the water storage barrel 11. When the temperature in the barrel is lower than the user's set value and the compressor 1 is running, the auxiliary electric heater of the water storage barrel 11 is turned on. When the compressor 1 is not turned on, the compressor 1 is turned on; when the barrel When the internal temperature is higher than the user's set value, the auxiliary electric heater and the compressor 1 are turned off sequentially according to the difference between the temperature in the barrel and the user's set value. In circulation mode, since the fourth water side valve 10-4 is opened, the water in the water storage tank 11 will flow out under the action of natural convection, enter the condenser 2 after passing through the fourth water side valve 10-4, and become For hot water to enter the water storage barrel 11 through the three-way valve 12, a circulation is formed.

In the non-heating season, both the heat exchange water circuit and the heating circuit stop flowing.

In the above embodiments, the switching of the water heater system between heating and non-heating seasons can be done manually by the user, or automatically through timer settings according to the heating time in different regions. The indoor evaporator 8 can be one of the plate, shell and tube, casing, and plate-fin heat exchangers, and the outdoor evaporator 7 can be one of the tube-fin and plate-fin heat exchangers. The device 2 can be one of the shell and tube type, the sleeve type, the plate type, the plate-fin type, etc., and the throttle valve 4 can be one of the thermal valve, the electronic expansion valve, and the like.

Water pumps may also be provided in the heat exchange water circuit, the heating circuit and the hot water circuit in this embodiment to force the water to flow therein.

In the present invention, in the heating season, the three-way valve 12 can adjust the water flow through the two heat exchangers according to the outlet water temperature of the condenser 2 and the first heat exchanger 9-1. 12 will only keep the circulation of water in the condenser 2, and the water path in the first heat exchanger 9-1 will be cut off.

Claims (4)

1. A heating system-heat pump coupled water heater system, characterized in that it comprises a heat pump system and a water circuit; The heat pump system includes a compressor (1), a condenser (2), an accumulator (3), a throttle valve (4), a first refrigerant side valve (5), a second refrigerant side valve (6), an outdoor Evaporator (7), indoor evaporator (8); The compressor (1) is connected to the condenser (2), the condenser (2) is connected to the accumulator (3), the accumulator (3) is connected to the throttle valve (4), and the throttle valve (4) passes the first refrigerant The side valve (5) is connected to the outdoor evaporator (7), and the second refrigerant side valve (6) is connected to the indoor evaporator (8), and the outdoor evaporator (7) and the indoor evaporator (8) are respectively connected to the compressor (1 ); The water circuit includes a first heat exchanger (9-1), a second heat exchanger (9-2), a first water side valve (10-1), a second water side valve (10-2), a third water Side valve (10-3), fourth water side valve (10-4), water storage bucket (11), three-way valve (12); The tap water inlet is connected to the first water side valve (10-1), and the first water side valve (10-1) is respectively connected to the second water side valve (10-2), the fourth water side valve (10-4), the condensation The device (2), the second water side valve (10-2) are respectively connected to the first heat exchanger (9-1), the fourth water side valve (10-4), the condenser (2), and the fourth water side valve (10-4) is connected to the water storage tank (11), the condenser (2) is connected to the three-way valve (12), and the three-way valve (12) is respectively connected to the water storage tank (11), the first heat exchanger (9-1), The water storage bucket (11) is connected to the third water side valve (10-3), the first heat exchanger (9-1) is respectively connected to heating water inlet and heating return water, the second heat exchanger (9-2), and the second The heat exchanger (9-2) is connected to the indoor evaporator (8); The water circuit is divided into three parts: the heat exchange water circuit, the heating circuit and the hot water circuit. The connecting pipeline between the indoor evaporator (8) and the second heat exchanger (9-2) is the heat exchange water circuit; Enter the first heat exchanger (9-1), then enter the second heat exchanger (9-2), come out from the second heat exchanger (9-2), and then enter the first heat exchanger (9-1 ), and then connect the pipeline of the heating return water to form the heating circuit; the remaining water circuit pipelines form the hot water circuit. 2. A heating-heat pump coupled water heater system according to claim 1, characterized in that a temperature sensor, a liquid level sensor and an auxiliary electric heater are arranged in the water storage bucket (11). 3 . The heating-heat pump coupled water heater system according to claim 2 , wherein water pumps are respectively set in the heat exchange water circuit, the heating circuit and the hot water circuit. 4 . 4. A heating-heat pump coupled water heater system according to claim 1, 2 or 3, characterized in that the indoor evaporator (8) is a plate-type, shell-and-tube, casing, or plate-fin heat exchanger One of the forms and/or the outdoor evaporator (7) is one of the tube-fin and plate-fin heat exchangers and/or the condenser (2) is the shell-and-tube and tube-and-tube type , plate type, plate-fin type and/or the throttle valve (4) is one of thermal valve and electronic expansion valve.