CN201757537U - Liquid-feeding circulation cold/hot water unit of evaporative condensate pump - Google Patents

Abstract

The utility model discloses an evaporative condensate pump liquid supply circulating cold and hot water unit, which comprises a compressor, a first refrigeration valve, an evaporative condenser, a second refrigeration valve, a throttling device, a circulating liquid storage barrel, a liquid A vapor compression refrigeration cycle composed of a pump, a third refrigeration valve, an evaporator, and a fourth refrigeration valve, and a compressor, a first heat pump valve, an evaporator, a second heat pump valve, a throttling device, and a circulating liquid storage tank , liquid pump, the third heat pump valve, evaporative condenser, and the fourth heat pump valve constitute a vapor compression heat pump cycle; the two cycles can be switched according to the needs of use, and the liquid refrigerant is transported to the evaporator by the liquid pump or evaporative condenser. Compared with the prior art, the utility model provides an evaporative condensate pump with higher heat exchange efficiency, safe and reliable use, free from frost in winter, high-efficiency operation, and free domestic hot water. Liquid circulation hot and cold water unit.

Description

An evaporative condensate pump liquid supply cycle cold and hot water unit

technical field

The invention relates to a cold and hot water unit, in particular to an evaporative condensate pump liquid supply circulation cold and hot water unit which is suitable for cooling and heating supply of an air conditioner throughout the year.

Background technique

The current vapor compression hot and cold water units can be divided into air-cooled heat pump units, water-cooled heat pump units and ground source heat pump units according to the condensation method. The air-cooled heat pump unit uses forced ventilation to exchange heat between the heat exchanger and the air. When the temperature is high in summer, the heat exchange efficiency is low, resulting in high condensation temperature and affecting the cooling efficiency of the refrigeration system; The surface of the heat exchanger is prone to frost and has poor low temperature resistance, which not only reduces the heat exchange efficiency of the outdoor heat exchanger, but also requires defrosting operation of the unit, which greatly reduces the effective heating working time. The water-cooled refrigerating unit realizes heat exchange in the water-cooled condenser through cooling water. The disadvantage is that the system is relatively complicated, requiring a circulation system of a water pump and a cooling tower, and the impact of flying water and noise is serious. Ground source heat pumps have high requirements on the water quantity and quality of water sources, and there are restrictions on recharge and architectural geographical conditions in their application, and a large underground area is required. Therefore, the market needs heat pump technology with higher heating efficiency and not limited by geographical conditions.

In addition, the existing liquid supply method of the evaporator also has many shortcomings. The energy efficiency ratio of the dry system is low, and the liquid level control and oil return are difficult in the flooded system. Therefore, the market needs higher heat exchange efficiency and safety. Reliable evaporator liquid supply system improves the heat exchange efficiency of the evaporator.

Contents of the invention

The purpose of the present invention is to overcome the shortcomings and deficiencies of the above-mentioned prior art, and provide an evaporator with high heat exchange efficiency, safe and reliable use, free from frost in winter, efficient operation, and free domestic hot water. Type condensate pump for liquid circulation cold and hot water unit.

In order to solve the problems of the technologies described above, the present invention is achieved through the following technical solutions:

An evaporative condensate pump liquid supply cycle hot and cold water unit, including a compressor 1, an evaporative condenser 2, a throttling device 3, a circulating liquid storage tank 4, a liquid pump 5, and an evaporator 6; the compressor 1 The exhaust port of the compressor 1 is connected to the gas pipe 2a of the evaporative condenser 2 through the first refrigeration valve 11, and the air inlet of the compressor 1 is connected to the top outlet of the circulating liquid storage barrel 4; the liquid pipe of the evaporative condenser 2 2b is sequentially connected to the lower inlet of the circulating liquid storage tank 4 through the second refrigeration valve 12 and the throttling device 3; the inlet of the liquid pump 5 is connected to the bottom outlet of the circulating liquid storage tank 4, and the outlet of the liquid pump 5 passes through the third The refrigeration valve 13 is connected to the liquid pipe 6a of the evaporator 6; the gas pipe 6b of the evaporator 6 is connected to the upper inlet of the circulating liquid storage tank 4 through the fourth refrigeration valve 14; the unit also includes a first heat pump valve 21, The second heat pump valve 22, the third heat pump valve 23 and the fourth heat pump valve 24; the inlet of the first heat pump valve 21 is connected with the exhaust port of the compressor 1, and the outlet of the first heat pump valve 21 is connected with the exhaust port of the compressor 1. The gas pipe 6b of the evaporator 6 is connected; the inlet of the second heat pump valve 22 is connected with the liquid pipe 6a of the evaporator 6, and the outlet of the second heat pump valve 22 is connected to the lower part of the circulating liquid storage tank 4 through the throttling device 3 The inlet is connected; the inlet of the third heat pump valve 23 is connected with the outlet of the liquid pump 5, and the outlet of the third heat pump valve 23 is connected with the liquid pipe 2b of the evaporative condenser 2; the outlet of the fourth heat pump valve 24 The inlet is connected to the gas pipe 2a of the evaporative condenser 2, and the outlet of the fourth heat pump valve 24 is connected to the upper inlet of the circulating liquid storage barrel 4; the compressor 1, the first refrigeration valve 11, the evaporative condenser 2, The second refrigeration valve 12, the throttling device 3, the circulating liquid storage barrel 4, the liquid pump 5, the third refrigeration valve 13, the evaporator 6, and the fourth refrigeration valve 14 form a vapor compression refrigeration cycle; A heat pump valve 21, an evaporator 6, a second heat pump valve 22, a throttling device 3, a circulating liquid storage tank 4, a liquid pump 5, a third heat pump valve 23, an evaporative condenser 2, and a fourth heat pump valve 24 form a vapor compression heat pump cycle.

As an improvement of the present invention, the first refrigeration valve 11 and the first heat pump valve 21 are combined into a first two-position three-way reversing valve 31; the second refrigeration valve 12 and the third heat pump valve 23 are combined It is the second two-position three-way reversing valve 32; the third refrigeration valve 13 and the second heat pump valve 22 are combined into a third two-position three-way reversing valve 33; the fourth refrigeration valve 14 and the fourth heat pump valve The pump valve 24 is combined into a fourth two-position three-way reversing valve 34; the first port 31a of the first two-position three-way reversing valve 31 is connected to the exhaust port of the compressor 1, and the first two-position three-way reversing valve The second port 31b of the directional valve 31 is connected to the gas pipe 2a of the evaporative condenser 2, and the third port 31c of the first two-position three-way reversing valve 31 is connected to the gas pipe 6b of the evaporator 6; The first port 32a of the one-position three-way reversing valve 32 is connected with the liquid pipe 2b of the evaporative condenser 2, the second port 32b of the second two-position three-way reversing valve 32 is connected with the inlet of the throttling device 3, and the second The third port 32c of the two-position three-way reversing valve 32 is connected with the outlet of the liquid pump 5; the first port 33a of the third two-position three-way reversing valve 33 is connected with the outlet of the liquid pump 5, and the third two-position The second port 33b of the three-way reversing valve 33 is connected with the liquid pipe 6a of the evaporator 6, and the third port 33c of the third two-position three-way reversing valve 33 is connected with the inlet of the throttling device 3; The first port 34a of the position three-way reversing valve 34 is connected to the gas pipe 6b of the evaporator 6, and the second port 34b of the fourth two-position three-way reversing valve 34 is connected to the gas pipe 2a of the evaporative condenser 2. The third port 34c of the four-two-position three-way reversing valve 34 is connected with the upper inlet of the circulating liquid storage tank 4 .

As an improvement of the present invention, the first cooling valve 11, the second cooling valve 12, the third cooling valve 13, the fourth cooling valve 14, the first heat pump valve 21, the second heat pump valve 22, the third cooling valve The heat pump valve 23 and the fourth heat pump valve 24 are electromagnetic valves or electric valves.

As an improvement of the present invention, the first two-position three-way reversing valve 31, the second two-position three-way reversing valve 32, the third two-position three-way reversing valve 33, the fourth two-position three-way reversing valve The direction valve 34 adopts an electric two-position three-way reversing valve or a pneumatic two-position three-way reversing valve.

As an improvement of the present invention, the exhaust port of the compressor 1 is provided with a heat recovery device 7; the inlet of the heat recovery device 7 is connected to the exhaust port of the compressor 1, and the outlets of the heat recovery device 7 are respectively connected The inlet of the first refrigeration valve 11 is connected to the inlet of the first heat pump valve 21 , or connected to the first port 31 a of the first two-position three-way reversing valve 31 .

As an improvement of the present invention, the evaporative condenser 2 adopts a plate tube evaporative condenser or a coil evaporative condenser.

As an improvement of the present invention, the evaporator 6 is a shell-and-tube evaporator or a finned evaporator.

As an improvement of the present invention, multiple evaporators 6 are connected in parallel.

As an improvement of the present invention, gravity liquid supply switching valves 8 are connected in parallel at both ends of the liquid pump 5 .

As an improvement of the present invention, a dry filter 9 and a sight glass 10 are arranged between the outlet of the evaporative condenser 2 and the inlet of the throttling device 3 .

Compared with prior art, the beneficial effect of the present invention is:

1. The present invention uses a liquid pump to supply liquid to the evaporator in summer refrigeration conditions to realize a vapor compression refrigeration cycle and provide a safer and more reliable liquid supply system for the evaporator, which is better than the current traditional dry evaporator or flooded evaporator The evaporator has a higher heat exchange efficiency.

2. In the heat pump working condition in winter, the present invention realizes the mutual conversion of the functions of the evaporator and the evaporative condenser through two-way valves or two-position three-way reversing valves, and transfers the functions of the evaporator to the evaporative condenser from the liquid pump. The device supplies liquid to improve its heat exchange efficiency. In addition, after adding antifreeze to the evaporative condenser, it can be applied to working conditions with a lower temperature than traditional air-cooled heat pumps, and can achieve frost-free and efficient operation.

3. The present invention utilizes the heat recovery device 7 to collect the waste heat discharged from the compressor 1 to replace domestic boilers to supply domestic hot water; compared with the prior art, the present invention can not only provide domestic hot water, but also reduce the Condensing pressure saves operating costs; at the same time, it saves the construction costs of boilers and boiler rooms, greatly saves coal and oil fuel costs, and reduces the pollution of boiler flue gas to the atmosphere.

Description of drawings

Fig. 1 shows a system schematic diagram of an evaporative condensate pump liquid supply cycle cold and hot water unit of the present invention.

Fig. 2 shows a system schematic diagram of an evaporative condensate pump liquid supply cycle cold and hot water unit using a two-position three-way reversing valve.

Fig. 3 schematically shows the vapor compression refrigeration cycle of the present invention, that is, the system schematic diagram under the summer refrigeration working condition.

Fig. 4 schematically shows the vapor compression heat pump cycle of the present invention, that is, the system schematic diagram under the working condition of the heat pump in winter.

Fig. 5 shows a system schematic diagram of an evaporative condensate pump liquid supply cycle chiller and hot water unit using multiple evaporators connected in parallel.

Fig. 6 shows a system schematic diagram of an evaporative condensate pump liquid supply cycle cold and hot water unit using a heat recovery device.

Fig. 7 shows a system schematic diagram of an evaporative condensate pump liquid supply cycle cold and hot water unit using a gravity liquid supply switching valve.

Fig. 8 shows a system schematic diagram of an evaporative condensate pump liquid supply cycle chiller and hot water unit using a dry filter and a sight glass.

In the figure: 1 compressor, 2 evaporative condenser, 3 throttling device, 4 circulation storage tank, 5 liquid pump, 6 evaporator, 7 heat recovery device, 8 gravity liquid supply conversion valve, 9 dry filter, 10 Sight glass, 11 first refrigeration valve, 12 second refrigeration valve, 13 third refrigeration valve, 14 fourth refrigeration valve, 21 first heat pump valve, 22 second heat pump valve, 23 third heat pump valve, 24 The fourth heat pump valve, 31 first two-position three-way reversing valve, 32 second two-position three-way reversing valve, 33 third two-position three-way reversing valve, 34 fourth two-position three-way reversing valve.

Detailed ways

Example 1

Fig. 1 shows a system schematic diagram of an evaporative condensate pump liquid supply circulating hot and cold water unit of the present invention, including a compressor 1, an evaporative condenser 2, a throttling device 3, a circulating liquid storage tank 4, a liquid Pump 5, evaporator 6; the exhaust port of the compressor 1 is connected to the gas pipe 2a of the evaporative condenser 2 through the first refrigeration valve 11, and the air inlet of the compressor 1 is connected to the top outlet of the circulating liquid storage tank 4 connected; the liquid pipe 2b of the evaporative condenser 2 is connected to the lower inlet of the circulating liquid storage tank 4 through the second refrigeration valve 12 and the throttling device 3 in turn; the inlet of the liquid pump 5 is connected to the circulating liquid storage tank 4 The bottom outlet is connected, the outlet of the liquid pump 5 is connected to the liquid pipe 6a of the evaporator 6 through the third refrigeration valve 13; the gas pipe 6b of the evaporator 6 is connected to the upper inlet of the circulating liquid storage tank 4 through the fourth refrigeration valve 14 .

The unit also includes a first heat pump valve 21, a second heat pump valve 22, a third heat pump valve 23 and a fourth heat pump valve 24; the inlet of the first heat pump valve 21 is connected to the exhaust port of the compressor 1 The outlet of the first heat pump valve 21 is connected to the gas pipe 6b of the evaporator 6; the inlet of the second heat pump valve 22 is connected to the liquid pipe 6a of the evaporator 6, and the outlet of the second heat pump valve 22 is connected through a joint The flow device 3 is connected to the lower inlet of the circulating liquid storage tank 4; the inlet of the third heat pump valve 23 is connected to the outlet of the liquid pump 5, and the outlet of the third heat pump valve 23 is connected to the liquid pipe 2b of the evaporative condenser 2 Connection; the inlet of the fourth heat pump valve 24 is connected to the gas pipe 2 a of the evaporative condenser 2 , and the outlet of the fourth heat pump valve 24 is connected to the upper inlet of the circulating liquid storage tank 4 .

The compressor 1, the first refrigeration valve 11, the evaporative condenser 2, the second refrigeration valve 12, the throttling device 3, the circulating liquid storage tank 4, the liquid pump 5, the third refrigeration valve 13, the evaporator 6, the first Four refrigeration valves 14 form a vapor compression refrigeration cycle; the compressor 1, the first heat pump valve 21, the evaporator 6, the second heat pump valve 22, the throttling device 3, the circulating liquid storage tank 4, the liquid pump 5, The third heat pump valve 23, the evaporative condenser 2, and the fourth heat pump valve 24 form a vapor compression heat pump cycle.

The evaporative condensate pump liquid supply cycle chiller and hot water unit in the first embodiment has two operating modes: a vapor compression refrigeration cycle and a vapor compression heat pump cycle.

Fig. 3 schematically shows the vapor compression refrigeration cycle of the present invention, that is, the system schematic diagram under the summer refrigeration working condition. As shown in Figure 3, the compressor 1 and the liquid pump 5 are both running; the first refrigeration valve 11, the second refrigeration valve 12, the third refrigeration valve 13 and the fourth refrigeration valve 14 are opened, and the first heat pump valve 21 and the fourth refrigeration valve are closed. The second heat pump valve 22, the third heat pump valve 23, and the fourth heat pump valve 24. At this time, the system performs a vapor compression refrigeration cycle: the compressor 1 sucks and circulates the gaseous refrigerant in the liquid storage barrel 4, compressing it into high temperature and high pressure High-temperature and high-pressure gaseous refrigerant enters the evaporative condenser 2 through the first refrigeration valve 11 and the gas pipe 2a of the evaporative condenser 2 in turn, exothermic and condensed into a high-pressure and medium-temperature liquid; high-pressure liquid refrigerant sequentially evaporates The liquid pipe 2b of the type condenser, the second refrigeration valve 12, and the throttling device 3 are depressurized and enter the circulating liquid storage tank 4; the liquid refrigerant in the circulating liquid storage tank 4 passes through the lower outlet of the circulating liquid storage tank 4, and passes through The liquid pump 5 pressurizes, and then sends it into the evaporator 6 through the third refrigeration valve 13 and the liquid pipe 6a of the evaporator 6, and exchanges heat with water or air to produce cold water or cold air; the gas-liquid mixture of the refrigerant is sequentially Through the gas pipe 6b of the evaporator 6 and the fourth refrigeration valve 14, it enters the circulating liquid storage tank 4 to realize a vapor compression refrigeration cycle.

Fig. 4 schematically shows the vapor compression heat pump cycle of the present invention, that is, the system schematic diagram under the working condition of the heat pump in winter. As shown in Figure 4, both the compressor 1 and the liquid pump 5 are running; the first heat pump valve 21, the second heat pump valve 22, the third heat pump valve 23 and the fourth heat pump valve 24 are opened, and the first refrigeration valve is closed 11. The second refrigerating valve 12, the third refrigerating valve 13 and the fourth refrigerating valve 14. At this time, the system performs a vapor compression heat pump cycle: the compressor 1 sucks and circulates the gaseous refrigerant in the liquid storage tank 4, compressing it into high temperature and high pressure High-temperature and high-pressure gaseous refrigerant enters the evaporator 6 through the first heat pump valve 21 and the gas pipe 6b of the evaporator 6 in turn, exothermic and condensed into a high-pressure and medium-temperature liquid; high-pressure liquid refrigerant passes through the liquid in the evaporator in turn The pipe 6a, the second heat pump valve 22, and the throttling device 3 are depressurized and enter the circulating liquid storage tank 4; the liquid refrigerant in the circulating liquid storage tank 4 passes through the lower outlet of the circulating liquid storage tank 4 and is increased Then through the third heat pump valve 23 and the liquid pipe 2b of the evaporative condenser 2, it is sent into the evaporative condenser 2 to exchange heat with water or air to produce cold water or cold air; the gas-liquid mixture of the refrigerant The gas pipe 2a of the evaporative condenser 2 and the fourth heat pump valve 24 enter into the circulating liquid storage barrel 4 successively to realize the vapor compression heat pump cycle.

Example 2

Fig. 2 shows a system schematic diagram of an evaporative condensate pump liquid supply cycle cold and hot water unit using a two-position three-way reversing valve. In this solution, the first refrigeration valve 11 and the first heat pump valve 21 are combined into a first two-position three-way reversing valve 31; the second refrigeration valve 12 and the third heat pump valve 23 are combined into a second two-position The three-way reversing valve 32; the third refrigeration valve 13 and the second heat pump valve 22 are combined into a third two-position three-way reversing valve 33; the fourth refrigeration valve 14 and the fourth heat pump valve 24 are combined into a The fourth two-position three-way reversing valve 34; the first port 31a of the first two-position three-way reversing valve 31 is connected to the exhaust port of the compressor 1, and the first two-position three-way reversing valve 31 The second port 31b is connected to the gas pipe 2a of the evaporative condenser 2, and the third port 31c of the first two-position three-way reversing valve 31 is connected to the gas pipe 6b of the evaporator 6; the second two-position three-way reversing The first port 32a of the valve 32 is connected to the liquid pipe 2b of the evaporative condenser 2, the second port 32b of the second two-position three-way reversing valve 32 is connected to the inlet of the throttling device 3, and the second two-position three-way reversing valve 32 is connected to the inlet of the throttling device 3. The third port 32c of the directional valve 32 is connected with the outlet of the liquid pump 5; the first port 33a of the third two-position three-way reversing valve 33 is connected with the outlet of the liquid pump 5, and the third two-position three-way reversing valve The second port 33b of 33 is connected to the liquid pipe 6a of the evaporator 6, and the third port 33c of the third two-position three-way reversing valve 33 is connected to the inlet of the throttling device 3; the fourth two-position three-way reversing The first port 34a of the valve 34 is connected to the gas pipe 6b of the evaporator 6, the second port 34b of the fourth two-position three-way reversing valve 34 is connected to the gas pipe 2a of the evaporative condenser 2, and the fourth two-position three-way The third port 34c of the reversing valve 34 is connected with the upper inlet of the circulating liquid storage tank 4 .

The evaporative condensate pump liquid supply cycle chiller and hot water unit in the first embodiment still has two operating modes: vapor compression refrigeration cycle and vapor compression heat pump cycle.

Fig. 3 schematically shows the vapor compression refrigeration cycle of the present invention, that is, the system schematic diagram under the summer refrigeration working condition. As shown in Figure 3, both the compressor 1 and the liquid pump 5 are running, and the system is performing a vapor compression refrigeration cycle: the compressor 1 sucks and circulates the gaseous refrigerant in the liquid storage barrel 4, and compresses it into a high-temperature and high-pressure gas; The high-temperature and high-pressure gaseous refrigerant enters the evaporative condenser 2 through the first two-position three-way reversing valve 31 and the gas pipe 2a of the evaporative condenser 2 in sequence, and releases heat and condenses into a high-pressure and medium-temperature liquid; the high-pressure liquid refrigerant sequentially passes through The liquid pipe 2b of the evaporative condenser, the second two-position three-way reversing valve 32, and the throttling device 3 are depressurized and enter the circulating liquid storage tank 4; the liquid refrigerant in the circulating liquid storage tank 4 passes through the circulating liquid storage tank The lower outlet of 4 is pressurized by the liquid pump 5, and then sent to the evaporator 6 through the third two-position three-way reversing valve 33 and the liquid pipe 6a of the evaporator 6, and is produced after heat exchange with water or air. Cold water or cold air; the gas-liquid mixture of the refrigerant enters the circulating liquid storage barrel 4 through the gas pipe 6b of the evaporator 6 and the fourth two-position three-way reversing valve 34 to realize a vapor compression refrigeration cycle.

Fig. 4 schematically shows the vapor compression heat pump cycle of the present invention, that is, the system schematic diagram under the working condition of the heat pump in winter. As shown in Figure 4, the compressor 1 and the liquid pump 5 are both running, and the system is performing a vapor compression heat pump cycle: the compressor 1 sucks and circulates the gaseous refrigerant in the liquid storage barrel 4, and compresses it into a high-temperature and high-pressure gas; The high-temperature and high-pressure gaseous refrigerant enters the evaporator 6 sequentially through the first two-position three-way reversing valve 31 and the gas pipe 6b of the evaporator 6, and releases heat and condenses into a high-pressure and medium-temperature liquid; the high-pressure liquid refrigerant sequentially passes through the liquid of the evaporator The pipe 6a, the third two-position three-way reversing valve 33, and the throttling device 3 are depressurized and enter the circulating liquid storage tank 4; the liquid refrigerant in the circulating liquid storage tank 4 passes through the lower outlet of the circulating liquid storage tank 4, and passes through The liquid pump 5 pressurizes, and then sends it into the evaporative condenser 2 through the second two-position three-way reversing valve 32 and the liquid pipe 2b of the evaporative condenser 2, and exchanges heat with water or air to produce cold water or Cold air; the gas-liquid mixture of the refrigerant enters the circulating liquid storage barrel 4 through the gas pipe 2a of the evaporative condenser 2 and the fourth two-position three-way reversing valve 34 to realize the vapor compression heat pump cycle.

As shown in FIG. 5 , the evaporator 6 may be a plurality of evaporators connected in parallel to meet the cooling demand of a single or multiple spaces. Preferably, the evaporator 3 can be a shell-and-tube evaporator or a finned evaporator.

As shown in Figure 6, a heat recovery device 7 can be installed at the exhaust port of the compressor 1, and the heat recovery technology is adopted in summer cooling conditions, and the hot water supply function is added in winter heat pump conditions to realize condensation heat. recycling; the inlet of the heat recovery device 7 is connected to the exhaust port of the compressor 1, and the outlet of the heat recovery device 7 is respectively connected to the inlet of the first refrigeration valve 11 and the inlet of the first heat pump valve 21, or connected to the second The first port 31a of a two-position three-way reversing valve 31.

As shown in FIG. 7 , the two ends of the liquid pump 5 can be connected in parallel with a gravity liquid supply switching valve 8 . When the refrigeration of compressor 6 is just started, open the gravity liquid supply switching valve 8, close the liquid pump 5, and supply liquid in the way of gravity liquid supply; wait until the liquid level of the circulating liquid storage tank 4 is stable, and the load of the compressor 1 reaches more than 60% , open the liquid pump 5, close the gravity liquid supply conversion valve 8, and switch to the liquid pump for liquid supply. This solution avoids the cavitation surge phenomenon of the liquid pump 5 caused by the unstable liquid level of the circulating liquid storage tank 4 . In addition, it is also possible to directly supply liquid to the evaporator 6 or the evaporative condenser 2 by using the gravity liquid supply mode without running the liquid supply pump 5 when the liquid supply pump 5 fails under partial load.

As a preference, the evaporative condenser 2 can adopt a plate tube evaporative condenser or a coil evaporative condenser, which can obtain a lower condensation temperature and reduce the system condensation pressure, thereby improving the energy efficiency ratio of the system.

As shown in FIG. 8 , a dry filter 9 and a sight glass 10 are arranged between the outlet of the evaporative condenser 2 and the inlet of the throttling device 3 , forming a complete refrigeration process pipeline.

Obviously, the present invention is not limited to the above embodiments, and many variations are possible. All deformations that can be directly derived or associated by those skilled in the art from the content disclosed in the present invention should be considered as the protection scope of the present invention.

Claims (10)

1. An evaporative condensate pump liquid supply cycle hot and cold water unit, including a compressor (1), an evaporative condenser (2), a throttling device (3), a circulating liquid storage tank (4), a liquid pump ( 5), evaporator (6); the exhaust port of the compressor (1) is connected with the gas pipe (2a) of the evaporative condenser (2) through the first refrigeration valve (11), and the compressor (1) The air inlet is connected to the top outlet of the circulating liquid storage tank (4); the liquid pipe (2b) of the evaporative condenser (2) passes through the second refrigeration valve (12) and the throttling device (3) and the circulating storage tank in sequence. The lower inlet of the liquid barrel (4) is connected; the inlet of the liquid pump (5) is connected to the bottom outlet of the circulating liquid storage barrel (4), and the outlet of the liquid pump (5) is connected to the evaporator through the third refrigeration valve (13) The liquid pipe (6a) of (6) is connected; the gas pipe (6b) of the evaporator (6) is connected with the upper inlet of the circulating liquid storage tank (4) through the fourth refrigeration valve (14), it is characterized in that: the The unit also includes a first heat pump valve (21), a second heat pump valve (22), a third heat pump valve (23) and a fourth heat pump valve (24); the first heat pump valve (21) The inlet is connected to the exhaust port of the compressor (1), the outlet of the first heat pump valve (21) is connected to the gas pipe (6b) of the evaporator (6); the inlet of the second heat pump valve (22) is connected to the The liquid pipe (6a) of the evaporator (6) is connected, and the outlet of the second heat pump valve (22) is connected with the lower inlet of the circulating liquid storage barrel (4) through a throttling device (3); the third heat pump valve The inlet of (23) is connected with the outlet of the liquid pump (5), and the outlet of the third heat pump valve (23) is connected with the liquid pipe (2b) of the evaporative condenser (2); the fourth heat pump valve (24 ) is connected to the gas pipe (2a) of the evaporative condenser (2), and the outlet of the fourth heat pump valve (24) is connected to the upper inlet of the circulating liquid storage barrel (4); the compressor (1), The first refrigeration valve (11), the evaporative condenser (2), the second refrigeration valve (12), the throttling device (3), the circulating liquid storage tank (4), the liquid pump (5), the third refrigeration valve ( 13), the evaporator (6), the fourth refrigeration valve (14) form a vapor compression refrigeration cycle; the compressor (1), the first heat pump valve (21), the evaporator (6), the second heat pump Valve (22), throttling device (3), circulating liquid storage tank (4), liquid pump (5), third heat pump valve (23), evaporative condenser (2), fourth heat pump valve (24 ) form a vapor compression heat pump cycle. 2. An evaporative condensate pump liquid supply cycle cold and hot water unit according to claim 1, characterized in that: the first refrigeration valve (11) and the first heat pump valve (21) are combined into a first The two-position three-way reversing valve (31); the second refrigeration valve (12) and the third heat pump valve (23) are combined into a second two-position three-way reversing valve (32); the third refrigeration valve (13) and the second heat pump valve (22) are merged into the third two-position three-way reversing valve (33); the fourth refrigeration valve (14) and the fourth heat pump valve (24) are merged into the fourth two position three-way reversing valve (34); the first port (31a) of the first two-position three-way reversing valve (31) is connected to the exhaust port of the compressor (1), and the first two-position three-way reversing valve (31) is connected to the exhaust port of the compressor (1). The second port (31b) of the directional valve (31) is connected to the gas pipe (2a) of the evaporative condenser (2), and the third port (31c) of the first two-position three-way reversing valve (31) is connected to the gas pipe (2a) of the evaporative condenser (2). The gas pipe (6b) of (6) is connected; the first port (32a) of the second two-position three-way reversing valve (32) is connected with the liquid pipe (2b) of the evaporative condenser (2), and the second The second port (32b) of the two-position three-way reversing valve (32) is connected to the inlet of the throttling device (3), and the third port (32c) of the second two-position three-way reversing valve (32) is connected to the liquid pump (5) outlet connection; the first port (33a) of the third two-position three-way reversing valve (33) is connected with the outlet of the liquid pump (5), and the third two-position three-way reversing valve (33) The second port (33b) of the evaporator (6) is connected to the liquid pipe (6a), and the third port (33c) of the third two-position three-way reversing valve (33) is connected to the inlet of the throttling device (3) ; The first port (34a) of the fourth two-position three-way reversing valve (34) is connected with the gas pipe (6b) of the evaporator (6), and the first port (34a) of the fourth two-position three-way reversing valve (34) The second port (34b) is connected to the gas pipe (2a) of the evaporative condenser (2), and the third port (34c) of the fourth two-position three-way reversing valve (34) is connected to the upper part of the circulating liquid storage barrel (4) Ingress connection. 3. An evaporative condensate pump liquid supply cycle cold and hot water unit according to claim 1 or 2, characterized in that: the first refrigeration valve (11), the second refrigeration valve (12), the third The refrigeration valve (13), the fourth refrigeration valve (14), the first heat pump valve (21), the second heat pump valve (22), the third heat pump valve (23), and the fourth heat pump valve (24) adopt Solenoid valve or electric valve. 4. An evaporative condensate pump liquid supply cycle cold and hot water unit according to claim 2, characterized in that: the first two-position three-way reversing valve (31), the second two-position three-way reversing valve Directional valve (32), the third two-position three-way reversing valve (33), the fourth two-position three-way reversing valve (34) adopt electric two-position three-way reversing valve or pneumatic two-position three-way reversing valve. 5. An evaporative condensate pump liquid supply cycle cold and hot water unit according to claim 1 or 2, characterized in that: the exhaust port of the compressor (1) is provided with a heat recovery device (7); The inlet of the heat recovery device (7) is connected to the exhaust port of the compressor (1), and the outlet of the heat recovery device (7) is respectively connected to the inlet of the first refrigeration valve (11) and the first heat pump valve (21) or the first port (31a) of the first two-position three-way reversing valve (31). 6. An evaporative condensate pump liquid supply cycle cold and hot water unit according to claim 1 or 2, characterized in that: the evaporative condenser (2) adopts a plate-tube evaporative condenser or a coil type Evaporative condenser. 7. An evaporative condensate pump liquid supply cycle cold and hot water unit according to claim 1 or 2, characterized in that: the evaporator (6) is a shell-and-tube evaporator or a finned evaporator. 8. An evaporative condensate pump liquid supply cycle chiller and hot water unit according to claim 1 or 2, characterized in that: the evaporators (6) are connected in parallel. 9. An evaporative condensate pump liquid supply cycle cold and hot water unit according to claim 1 or 2, characterized in that: both ends of the liquid pump (5) are connected in parallel with a gravity liquid supply switching valve (8) . 10. An evaporative condensate pump liquid supply cycle cold and hot water unit according to claim 1 or 2, characterized in that: the outlet of the evaporative condenser (2) and the inlet of the throttling device (3) A dry filter (9) and a sight glass (10) are arranged between them.

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