CN101382354A - Double function all-weather high temperature water-water heat pump hot water unit - Google Patents

Abstract

The invention relates to an all-weather high-temperature water-water heat pump hot water unit, which is characterized in that it includes a compressor (1), a condenser (2), a water-cooled evaporator (3), an air-cooled evaporator (4), and two throttle valves (51, 52) and three-way regulating valve (6); the refrigerant output end (11) of the compressor (1) is connected with the refrigerant input end (21) of the condenser (2); the refrigerant output end of the condenser (2) (22) is connected with the input end (61) of three-way regulating valve (6), and the output end (62,63) of three-way regulating valve (6) is respectively connected with air-cooled evaporator ( 4), the refrigerant input end of the refrigerant input end (31) of the water-cooled evaporator (3) is connected to the refrigerant input end; (1) is connected to the refrigerant input end (12). The invention is composed of double evaporators working together, has the effects of simple structure, low cost and low operation cost, is energy-saving and environment-friendly, and can save initial investment and operation costs.

Description

Double function all-weather high temperature water-water heat pump hot water unit

technical field

The invention relates to a dual-function all-weather high-temperature water-water heat pump hot water unit, which is especially suitable for buildings that simultaneously demand chilled water for air conditioning in summer, hot water for air conditioning in winter, and domestic hot water throughout the year. It belongs to the technical field of construction equipment.

Background technique

At present, the structural characteristics of the common high-temperature water-water heat pump hot water units on the market are: mainly composed of a compressor, a high-temperature water-cooled condenser, and a low-temperature water-cooled evaporator. In summer working conditions, the heat source provided by the water-cooled evaporator is used to prepare hot water, and at the same time, chilled water is prepared for the use of air conditioners, which plays a dual role, and its equivalent heating energy efficiency ratio COP≥6.0W/W; With chilled water, that is to say, the water-cooled evaporator cannot be used as a heat source to prepare hot water. The equipment can only be stopped and replaced by a boiler to prepare hot water. In order to solve the above problems, the utility model patent No. "200720060969.3" discloses a heat pump hot water unit with the functions of cooling, heating and producing domestic hot water. It consists of a refrigeration circuit and a heating circuit, in which, the compressor, the hot water side heat exchanger, the four-way valve, the air side heat exchanger, the third one-way valve, the liquid storage tank, the dry filter, the expansion valve, the first The one-way valve, air-conditioning water-side heat exchanger, four-way valve, and gas-liquid separator are connected in sequence to form a refrigeration circuit; at the same time, the compressor, hot water-side heat exchanger, four-way valve, air-conditioning water-side heat exchanger, and the second A one-way valve, a liquid storage tank, a dry filter, an expansion valve, a fourth one-way valve, an air-side heat exchanger, and a gas-liquid separator are connected in sequence to form a heating circuit; the expansion valve and the solenoid valve are connected in parallel. Although this utility model can integrate the functions of cooling/heating/and domestic hot water production in one device, it has a duplex effect, can save a certain amount of equipment investment and improve energy saving effect, but it still has complex structure and high cost. and high operating costs.

Contents of the invention

The purpose of the present invention is to overcome the defects of complex structure, high cost and high operating cost of the existing heat pump water heater units, and provide a dual-function all-weather high-temperature water-water heat pump hot water with simple structure, low cost and low operating cost The unit can provide buildings with chilled water for air conditioning in summer, hot water for air conditioning in winter and domestic hot water throughout the year.

The purpose of the present invention can be achieved through the following technical solutions:

Double-function all-weather high-temperature water-water heat pump hot water unit, its structural features are: including a compressor, a condenser, a water-cooled evaporator, an air-cooled evaporator, two throttle valves and a three-way regulating valve; the refrigerant output end of the compressor It is connected to the refrigerant input end of the condenser; the refrigerant output end of the condenser is connected to the input end of the three-way regulating valve, and one output end of the three-way regulating valve is connected to the refrigerant input end of the air-cooled evaporator through one of the throttle valves. The second output end of the three-way regulating valve is connected to the refrigerant input end of the water-cooled evaporator through the second throttle valve; the refrigerant output ends of the water-cooled evaporator and air-cooled evaporator are connected in parallel to the refrigerant input end of the compressor; the condenser The water inlet and outlet of the water-cooled evaporator are respectively connected to the user end, and the water inlet and outlet of the water-cooled evaporator are respectively connected to the user end.

One embodiment of the present invention is: the condenser can be constituted by a water-cooled high-temperature condenser.

One embodiment of the present invention is that the three-way regulating valve can be composed of an electric three-way regulating valve, and the control end of the electric three-way regulating valve is externally connected to the signal output end of the controller.

The beneficial effects of the present invention are:

1. Since the present invention is equipped with an air-cooled evaporator structure, the double evaporators work together, so that the unit can use the air source (atmosphere) as a heat source to prepare hot water when there is no air-conditioning water heat source, thus solving the problem that the current high-temperature water cannot be operated in winter - Problems with water heat pump hot water units. It is especially suitable for buildings that require both chilled water for air-conditioning in summer, hot water for air-conditioning in winter, and domestic hot water throughout the year. It can replace boilers in areas such as East China and South China where the calculated outdoor temperature of heating in winter is ≥ -5°C.

2. Since the compressor, double evaporator, and condenser of the present invention are connected into a closed-loop circuit through a regulating valve, the parts used are less, so it has the effects of simple structure, low cost and low operating cost, which is energy-saving and environmentally friendly. Can save initial investment and operating costs.

Description of drawings

Fig. 1 is a structural schematic diagram of a specific embodiment of the present invention.

Detailed ways

Specific examples:

With reference to Fig. 1, present embodiment comprises compressor 1, condenser 2, water-cooled evaporator 3, air-cooled evaporator 4, two throttling valves (51,52) and three-way regulating valve 6; The refrigerant output of compressor 1 The end 11 is connected to the refrigerant input end 21 of the condenser 2; the refrigerant output end 22 of the condenser 2 is connected to the input end 61 of the three-way regulating valve 6, and an output end 62 of the three-way regulating valve 6 passes through one of the throttle valves 51 It is connected with the refrigerant input end 41 of the air-cooled evaporator 4, and the second output end 63 of the three-way regulating valve 6 is connected with the refrigerant input end 31 of the water-cooled evaporator 3 through the throttle valve two 52; the water-cooled evaporator 3, the air-cooled The refrigerant output ends (32, 42) of the evaporator 4 are connected in parallel to the refrigerant input end 12 of the compressor 1; the water inlet 23 and the water outlet 24 of the condenser 2 are respectively connected to the user end, and the water inlet of the evaporator 3 is water-cooled The end 33 and the water outlet end 34 are respectively connected with the user end.

In this embodiment, the condenser 2 may be composed of a conventional water-cooled high-temperature condenser. The two throttle valves (51, 52) can be formed by conventional throttle regulating valves. The three-way regulating valve 6 can be composed of a conventional electric three-way regulating valve, and the control end of the electric three-way regulating valve is externally connected to the signal output end of the controller.

In practical applications, the inlet and outlet water temperatures of the water-cooled condenser 2 are 50°C and 60°C respectively, which can be adjusted as required; the inlet and outlet water temperatures of the water-cooled evaporator are 12°C and 7°C, respectively, which can be adjusted as required.

The invention is particularly suitable for buildings that simultaneously demand chilled water for air conditioning in summer, hot water for air conditioning in winter, and domestic hot water throughout the year. In summer, the heat source provided by the water-cooled evaporator is mainly used to prepare hot water, and at the same time, chilled water is prepared for the use of air-conditioning users. When the chilled water demand of air-conditioning users changes, the electric three-way regulating valve automatically adjusts the flow through the water-cooled evaporator and the air-cooled evaporator. Refrigerant flow to ensure the supply of hot water for its users. The comprehensive COP of its summer working conditions is ≥ 6.0W/W; in winter working conditions, the heat source is mainly provided by the air-cooled evaporator to prepare hot water. When the air conditioner users have chilled water demand, The refrigerant flow through the water-cooled evaporator and the air-cooled evaporator is automatically adjusted through the electric three-way regulating valve to ensure the supply of hot water for its users, and its comprehensive COP in winter conditions is ≥ 3.0W/W.

Claims (3)

1. Double-function all-weather high-temperature water-water heat pump hot water unit, which is characterized by: including compressor (1), condenser (2), water-cooled evaporator (3), air-cooled evaporator (4), two throttling valves (51, 52)) and three-way regulating valve (6); the refrigerant output end (11) of the compressor (1) is connected with the refrigerant input end (21) of the condenser (2); the refrigerant of the condenser (2) The output end (22) is connected with the input end (61) of the three-way regulating valve (6), and an output end (62) of the three-way regulating valve (6) is connected to the air-cooled evaporator ( 4) is connected to the refrigerant input end (41), and the second output end (63) of the three-way regulating valve (6) is connected to the refrigerant input end (31) of the water-cooled evaporator (3) through the second throttle valve (52). The refrigerant output ports (32, 42) of the water-cooled evaporator (3) and the air-cooled evaporator (4) are connected in parallel with the refrigerant input port (12) of the compressor (1); the water inlet port of the condenser (2) (23), the water outlet (24) are respectively connected to the user end, and the water inlet (33) and the water outlet (34) of the water-cooled evaporator (3) are respectively connected to the user end. 2. The double-function all-weather high-temperature water-water heat pump hot water unit according to claim 1, characterized in that: the condenser (2) is composed of a water-cooled high-temperature condenser. 3. The dual-function all-weather high-temperature water-water heat pump hot water unit according to claim 1, characterized in that: the three-way regulating valve (6) is composed of an electric three-way regulating valve, and the control end of the electric three-way regulating valve is externally controlled The signal output terminal of the device.

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